JP2006344447A - Vehicular battery/electric unit combined structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular battery/electric unit combined structure capable of preventing the battery from being reversely connected between direct current terminals of the electric unit. <P>SOLUTION: The battery 8 is housed in a case main body 21 fixed to a body of the vehicle, and the control unit (electric unit) 9 is held on a front face of the case main body 21. Bus-bars for a cathode and an anode are casted in a cover 22 closing an opening arranged at upper end of the case main body 21. The bus-bar for the cathode is connected to a cathode terminal 802 of the battery and a cathode side direct current terminal ta of the controller by a bolt, and the bus-bar for the anode is connected to an anode terminal 803 of the battery and an anode side direct current terminal tb of the controller by a bolt. It is constructed so that the bus-bar casted in the cover 22 can be connected to the terminals corresponding to the battery 8 and the control unit 9 only when the battery 8 is housed in the case main body 21 in correct direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted battery / electric unit combination structure including a vehicle-mounted battery and an electric unit mounted on a vehicle.

  Generally, a generator such as a magnet generator is attached to an engine for driving a vehicle, and a battery that supplies electric power to various electrical components is charged by the output of the generator. Electric units such as control units and voltage regulators for various electrical components are connected to both ends of the battery. Some of the electric units connected to the battery require a large current to flow. Many.

  Recently, a rotating electrical machine that operates as a starter motor when an engine is started and operates as a battery charging generator after the engine is started has been developed and put into practical use. A rotating electrical machine used for this type of purpose is called a starter generator in the sense that it serves as both a starter motor and a battery charging generator. In order to operate the starter generator, it is necessary to connect a control unit for controlling energization from the battery to the starter generator and energization from the starter generator to the battery. In this control unit, it is necessary to flow a large current of about 100 A when energizing the starter generator from the battery to operate the starter generator as a starter motor.

  A starter generator is disclosed in Patent Document 1, for example. A starter generator disclosed in Patent Document 1 has a multi-phase armature coil wound around an iron core having a magnetic field and a rotor attached to an engine crankshaft and a magnetic pole portion facing the magnetic pole of the rotor. When the engine is started, it is operated as a brushless motor, and after the engine is started, it is operated as a magnet generator for charging a battery.

  As shown in Patent Document 1, the control unit used to operate the starter generator rectifies the AC output supplied from the armature coil when the starter generator is operated as a generator and supplies the rectified battery to the battery. The driver includes a full-wave rectifier circuit and an inverter-type switch circuit that supplies a drive current from the battery to the starter generator when the starter generator operates as a motor, and a controller that controls the driver.

  Usually, an in-vehicle electric unit connected to a battery is often supported at a location away from the battery and connected to the battery via an electric wire. FIG. 8 shows an example of a vehicle equipped with a starter generator. The illustrated vehicle 1 is an ATV (All Terrain Vehicle, so-called buggy vehicle), and includes a vehicle body 3 equipped with an engine 2, a pair of front wheels 5 operated by a handle 4, and a pair of rear wheels 6. 5 and the rear wheel 6 are driven by the engine 2. A starter generator (SG) 7 includes a rotor having a magnet field and attached to the crankshaft of the engine 2, and a stator having a three-phase armature coil and fixed to the engine case.

  In the illustrated example, a battery 8 ′ and a control unit 9 ′ are mounted on the rear and front parts of the vehicle body 3, respectively, and a positive DC terminal and a negative DC terminal of the control unit 9 ′ and a positive terminal and a negative terminal of the battery 8 ′. Are connected through electric wires 10 and 11, respectively. The three-phase AC side terminal of the control unit 9 'is connected to the terminal of the three-phase armature coil of the starter generator through three electric wires 12u to 12w.

  The driver provided in the control unit 9 ′ includes a full-wave rectifier circuit that rectifies the AC output of the armature coil of the starter generator, so that if the battery 8 ′ is accidentally connected in the reverse direction, Battery 8 'is short-circuited by a diode constituting a full-wave rectifier circuit. When the battery 8 'is short-circuited in this way, a large short-circuit current flows from the battery through the full-wave rectifier circuit, so that the rectifier elements constituting the rectifier circuit are instantaneously destroyed.

In a driver of this type of control unit, as shown in Patent Document 1, a MOSFET is used as a switch element constituting an inverter type switch circuit, and the entire circuit is formed by a parasitic diode formed between the drain and source. In many cases, the wave rectifier circuit is configured. In this case, when the battery is reversely connected, the MOSFET itself is destroyed. In order to prevent such an accident from occurring, as shown in Patent Document 2, a relay in which a contact is inserted between the battery and the driver and the battery are connected only when the battery is connected in the correct direction. It has been proposed to provide a protection device that includes a control circuit that controls the magnet to close the contacts by exciting the relay.
JP 2000-209891 A JP 2001-69796 A

  As described above, in the conventional vehicle, the battery 8 ′ and the electric unit (control unit 9 ′ in the above example) are connected via the electric wire, but the battery and the electric unit are connected by the electric wire. When connected, the wire vibrates greatly due to vibrations transmitted from the vehicle body, so that a large force is applied to the connecting portion between the wires 10, 11 and the battery 8 'and the connecting portion between the wires 10, 11 and the control unit 9'. There is a possibility that 10, 11 may come off from the battery 8 'and / or the control unit 9', or the connection part may be loosened. In particular, in the case of a vehicle that travels on rough terrain such as ATV, since vibration transmitted from the vehicle is large, it is preferable to connect the battery and the control unit with a long electric wire as shown in FIG. Absent. In particular, when a large diameter wire is used as the electric wires 10 and 11 in order to pass a large current, the above-mentioned problem is conspicuous because the mass is large.

  Further, if the battery and the electric unit are connected via an electric wire, the electric wire is troublesome to be routed, so that the number of man-hours for assembling the electric unit to the vehicle increases and the cost of the vehicle increases. Therefore, it is desirable to minimize the number of connection points using electric wires.

  Furthermore, when the battery and the electric unit are connected via an electric wire, the wiring resistance between the battery and the electric unit increases, so that a large current needs to flow from the battery to the electric unit. In some cases, the loss becomes large.

  Further, as shown in Patent Document 2, in the case where a protective device is provided in the control unit in preparation for the case where the battery is erroneously reversely connected, not only the control unit 9 becomes large but also its cost. The problem that becomes high occurs.

  In the above description, the case where the electric unit connected to both ends of the battery is the control unit of the starter generator is taken as an example, but the case where the electric unit connected to the battery is another unit such as a voltage regulator. However, the same problem as above occurs.

  An object of the present invention is to enable connection between a battery and an electric unit without using an electric wire, thereby reducing costs and facilitating mounting on a vehicle body, as well as vibration of the vehicle body. It is an object of the present invention to provide an in-vehicle battery / electric unit combination structure that can eliminate the possibility of disconnection between a battery and an electric unit.

  Another object of the present invention is to provide an in-vehicle battery / electric unit combination structure in which the wiring resistance between the battery and the electric unit can be reduced to reduce the loss when a large current is applied. There is to do.

  Still another object of the present invention is to enable a connection between a battery and an electric unit without using an electric wire, and also to prevent a battery from being reversely connected when the battery is mounted on a vehicle body. An object of the present invention is to provide a vehicle-mounted battery / electric unit combination structure that can be provided.

  The present invention is connected to a battery in a unit case provided with a battery attached to a vehicle body driven by an engine, and a positive DC terminal and a negative DC terminal connected to the positive terminal and the negative terminal of the battery, respectively. The present invention relates to a vehicle-mounted battery / electric unit combination structure including a vehicle-mounted electric unit in which components of an electric circuit to be stored are accommodated.

  In the present invention, the electric unit is disposed adjacent to the battery, and the positive terminal and the negative terminal of the battery are connected to the positive DC terminal and the negative DC terminal of the electric unit through the positive bus bar and the negative bus bar, respectively. Yes.

  As described above, the electric unit is disposed at a position adjacent to the battery, and the positive terminal and the negative terminal of the battery are connected to the positive DC terminal and the negative DC terminal of the electric unit through the positive bus bar and the negative bus bar, respectively. As a result, since the battery and the electric unit can be electrically connected without using a troublesome electric wire, the number of man-hours for mounting the electric unit on the vehicle body can be reduced, and the cost of the vehicle can be reduced. Reduction can be achieved.

  Further, since the battery and the electric unit are connected at a close distance via the bus bar, the wiring resistance between the battery and the electric unit can be minimized and the loss in the wiring resistance can be achieved. The power can be efficiently supplied from the battery to the electric load.

  In addition, since the battery and the electric unit can be connected at a close distance, it is possible to prevent the member (bus bar) connecting the electric unit and the battery from greatly vibrating due to vibration transmitted from the vehicle body. It is possible to prevent an excessive force from being applied to the electrical connection portion between the battery and the electric unit. Therefore, it is possible to prevent the connection portion between the battery and the electric unit from being disconnected or loosened, and there is a risk that the electrical connection between the battery and the electric unit will be poor or the connection may be broken. It can be lost.

  In a preferred aspect of the present invention, the positive electrode bus bar and the negative electrode terminal are provided only when the positive electrode terminal and the negative electrode terminal of the battery are arranged at predetermined positions with respect to the positive electrode side DC terminal and the negative electrode side DC terminal of the electric unit, respectively. Configured to connect the bus bar to the corresponding terminals on the battery and electrical unit

  With this configuration, since the battery is not connected to the electric unit in the reverse direction, it is not necessary to provide a protective device provided in the case where the battery is connected in the reverse direction. Therefore, it is possible to reduce the size of the electric unit and reduce the cost.

  In another preferred aspect of the present invention, a battery case having a unit holder for holding the electric unit on the outside is provided, the battery is accommodated in the battery case, and the electric unit is held in the unit holder. When the battery is accommodated in the battery, the positions of the positive and negative terminals of the battery are uniquely determined, and when the electric unit is held in the unit holder, the positions of the positive and negative DC terminals of the electric unit are unambiguous. The battery case and the unit holder are configured as determined. Also, the positive electrode bus bar and the negative electrode bus bar formed by conductive plates between the positive electrode side DC terminal of the electric unit held by the unit holder and the positive electrode terminal of the battery and between the negative electrode side DC terminal of the electric unit and the negative electrode terminal of the battery, respectively. Connected through.

  With the above configuration, when the battery is accommodated in the battery case and the electric unit is held by the unit holder, the position of each terminal of the battery and the electric unit is uniquely determined. The possibility of being connected in the opposite direction can be eliminated. In addition, the positive side DC terminal of the electric unit and the positive terminal of the battery and the negative side DC terminal of the electric unit and the negative terminal of the battery are connected by a positive electrode bus bar and a negative electrode bus bar made of conductive plates, respectively. However, the battery and the electric unit can be connected without using a troublesome electric wire.

  In still another preferred embodiment of the present invention, a case body having a unit holder for holding an electric unit on a side surface and having an upper end opened, and an insulating resin cover disposed so as to close the upper end opening of the case body, A battery case attached to the vehicle body of the vehicle is provided, the battery is housed in the case body of the battery case, and the electric unit is held by the unit holder.

  Further, in this embodiment, the positive side DC terminal and the negative side DC terminal are provided on the upper part of the electric unit held by the unit holder, and when the cover is put on the upper end of the case body, one end and the other end are respectively positive electrodes of the battery. The positive electrode bus bar provided on the positive electrode side DC terminal of the terminal and the electric unit, and when the cover is put on the upper end of the case body, one end and the other end are the negative electrode terminal of the battery and the negative electrode side of the electric unit, respectively. A negative electrode bus bar provided on the DC terminal is cast in the cover. One end of each of the positive electrode bus bar and the negative electrode bus bar is connected to the positive electrode terminal and the negative electrode terminal of the battery by a bolt, and the other end of each of the positive electrode bus bar and the negative electrode bus bar is connected to the positive electrode side DC terminal of the electric unit and Connected to the negative side DC terminal with a bolt.

  When configured as described above, the battery is accommodated in the battery case in the correct orientation and the electric unit is not held in the unit holder in the correct orientation. Since it cannot connect to a terminal and a negative electrode side DC terminal, the incorrect connection of a battery can be prevented reliably. In addition, since the battery can be correctly connected between the battery and the electric unit by simply placing the cover on the case body and bolting the end of each bus bar to the corresponding terminal after housing the battery in the case body. The operation of attaching the battery / electric unit combination structure to the battery can be facilitated.

  In still another preferred aspect of the present invention, a metal frame fixed to the vehicle body is provided, the battery case is fixed to the metal frame with a bolt, and the bolt for fixing the battery case to the metal frame is one of the negative electrode bus bars. The negative electrode bus bar is configured to be grounded to the vehicle body of the vehicle.

  With this configuration, the battery negative electrode terminal can be automatically grounded to the vehicle body by attaching the battery / electric unit combination structure to the vehicle. -Installation of the electric unit combination structure can be facilitated.

  The present invention is particularly useful when the engine includes a starter generator and the control unit of the starter generator is connected to a battery as the electric unit. The control unit for the starter generator converts the AC output supplied from the armature coil through the AC side terminal to the DC output when the starter generator is operated as a generator, and converts the DC output to the positive side DC terminal and the negative side DC. When starting the engine with a full-wave rectifier circuit supplied to the battery from the terminal, the DC output given from the battery through the positive side DC terminal and the negative side DC terminal is converted to the drive current required to operate the starter generator as a motor. Thus, there is provided an electric circuit constituting a driver having an inverter type switch circuit for supplying the drive current from the AC side terminal to the armature coil and a controller for controlling the driver.

  As described above, according to the present invention, since the battery and the electric unit are connected via the bus bar, the battery and the driver are electrically connected without using a troublesome electric wire. It is possible to reduce the number of man-hours for mounting the electric unit on the vehicle body and reduce the cost of the vehicle.

  Further, according to the present invention, since the battery and the electric unit are connected at a close distance through the bus bar, the wiring resistance between the battery and the electric unit is minimized, and the loss in the wiring resistance is reduced. Thus, there is an advantage that power can be efficiently supplied from the battery to the electric load.

  Further, according to the present invention, since the battery and the electric unit are connected at a close distance via the bus bar, the member that connects the electric unit and the battery greatly vibrates due to vibration transmitted from the vehicle body. Therefore, it is possible to prevent an excessive force from being applied to the electrical connection portion between the battery and the electric unit. Therefore, it is possible to prevent the connection portion between the battery and the electric unit from being disconnected or loosened, and there is a risk that the electrical connection between the battery and the electric unit will be poor or the connection may be broken. Elimination can increase reliability.

  In particular, according to the invention described in claim 2, 3 or 4, it is possible to eliminate the possibility that the battery is connected in the reverse direction. It is also possible to obtain an effect that the protective device is omitted and the electric unit can be miniaturized and the cost can be reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show an embodiment in which the present invention is applied when an electric unit connected to a battery is a control unit of a starter generator. FIG. 1 shows a battery / electric unit combination structure according to the present invention. FIG. 2 is a perspective view showing an example of a state in which the battery / electric unit combination structure according to the present invention is mounted on a vehicle body, and FIG. 3 is a diagram of the structure according to the present embodiment. FIG. 4 is an exploded perspective view of the structure, FIG. 5 is a perspective view showing a cover of a battery case used in the present embodiment, and FIGS. 6A and 6B are books. The perspective view which showed the bus bar for negative electrodes and the bus bar for positive electrodes used by embodiment of invention, FIG. 7 is sectional drawing which abbreviate | omitted some connection parts of the cover of a battery case, and a control unit. .

  In FIG. 1, 7 is a starter generator, and this starter generator is composed of a rotor 7A attached to the crankshaft of the engine and a stator 7B fixed to the case of the engine. The rotor 7A is fixed to the inner periphery of the peripheral wall of the flywheel 701 and the cup-shaped iron flywheel (rotor yoke) 701 attached to the crankshaft of the engine, and is magnetized so that the magnetic poles on the inner periphery side are different. Arc-shaped permanent magnets 702 and 703. In the illustrated example, both magnets are magnetized in the radial direction of the flywheel so that the magnetic pole on the inner peripheral side of the magnet 702 is an N pole and the magnetic pole on the inner peripheral side of the magnet 703 is an S pole.

  The stator 7B includes an armature core (not shown) having three magnetic pole portions facing the magnet field of the rotor 7A, and three-phase armature coils Lu, Lv, and Lw wound around the armature core. It is made up of. The three-phase armature coils Lu to Lw are star-connected. On the stator side of the starter generator 7, position sensors hu, hv and hw are provided for detecting the position of the magnetic poles of the rotor 7 with respect to the armature coils Lu, Lv and Lw when the starter generator is driven as a brushless motor. ing. As these position sensors, sensors similar to those widely used in known brushless motors, for example, Hall ICs are used. The position sensors hu to hw output detection signals Hu to Hw indicating different levels depending on whether the detected magnetic pole of the rotor is the N pole or the S pole.

  In the illustrated example, the rotor 7A has two poles and the stator has three poles. However, in the case of a starter generator that operates as a three-phase brushless motor when the engine is started, the rotor is similar to a general brushless motor. The magnetic poles can be 2n (n is an integer of 1 or more), and the number of poles of the stator can be 3n.

  Reference numeral 9 denotes a starter generator control unit, which includes a driver 901 and a controller 902 for controlling the driver 901.

  The driver 901 is the same as that provided in the three-phase brushless motor, and is a diode bridge three-phase full-wave rectifier circuit comprising diodes Du to Dw and Dx to Dz constituting the upper side and the lower side of the three-phase bridge, respectively. It is composed of an inverter type switch circuit composed of MOSFETs Fu to Fw and Fx to Fz that constitute the upper side and the lower side of the three-phase bridge, respectively. In this example, parasitic diodes formed between the drains and sources of the MOSFETs Fu to Fw and Fx to Fz are used as the diodes Du to Dw and Dx to Dz constituting the full-wave rectifier circuit.

  Positive-side DC terminals ta and tb are derived from the positive-side and negative-side DC-side terminals of the full-wave rectifier circuit and the switch circuit, and AC-side terminals tu to tw are derived from the respective three-phase AC-side terminals. . The positive side DC terminal ta and the negative side DC terminal tb are connected to the positive terminal and the negative terminal of the battery 8, respectively. The three-phase AC side terminals tu to tw are connected to the non-neutral point terminals of the armature coils Lu to Lw through the electric wires 12u to 12w, respectively.

  The controller 902 includes a microprocessor, and constitutes a driver switch circuit based on rotor rotational angle position information obtained from position detection signals Hu to Hw obtained from position sensors hu to hw when starting the engine. A drive signal Id is applied to the MOSFETs Fu to Fw and Fx to Fz, and a drive current Id commutated in a predetermined phase sequence is supplied from the battery 8 to the armature coils Lu to Lw, thereby generating a rotating magnetic field from the armature coils. Then, the rotor 7A is rotated in the direction to start the engine.

  After the engine is started, the starter generator 7 is operated as a generator, and a charging current Ic is applied to the battery 8 through the full-wave rectifier circuit of the driver 901 from the armature coils Lu to Lw. After the engine is started, the controller 902 simultaneously turns on or off the MOSFETs Fx to Fz constituting the lower side of the bridge of the switch circuit of the driver 901 or the MOSFETs Fu to Fw constituting the upper side of the bridge, thereby turning the armature coils Lu to Lw. To control the output voltage of the full-wave rectifier circuit so that the voltage applied across the battery 8 through the full-wave rectifier circuit of the driver 901 does not exceed the set value. In this control, for example, when the voltage at both ends of the battery 8 exceeds a set value, the MOSFETs Fx to Fz are simultaneously turned on, and the generator is passed through these MOSFETs and any diode constituting the full-wave rectifier circuit. The voltage at both ends of the battery is lowered by short-circuiting the output terminals. When the voltage across the battery 8 becomes lower than the set value, all MOSFETs constituting the driver switch circuit are turned off and the full-wave rectified output voltages of the armature coils Lu to Lw are applied to the battery 8 as they are. Thus, the switch circuit of the driver 901 is controlled.

  In addition to the position detection signals Hu to Hw, an output signal of a detection circuit that detects the voltage across the battery 8 is input to the controller 902, but the input of these signals is not shown. In this embodiment, a MOSFET is used as a switch element constituting each side of the bridge of the switch circuit of the driver 901. However, other power switches such as bipolar power transistors and IGBTs (gate insulation transistors) are used. The switch circuit of the driver can also be configured using the element. If a parasitic diode that can flow a large current is not formed at both ends of the switch element that constitutes the switch circuit, reverse the diode having the current capacity necessary for the switch element that constitutes each side of the bridge of the switch circuit. A full-wave rectifier circuit that rectifies the outputs of the armature coils Lu to Lw by connecting in parallel is configured.

  The components of the driver 901 and the controller 902 are accommodated in a flat rectangular unit case 903 made of insulating resin as shown in FIGS. As a unit. A heat sink 904 is cast into the unit case 903, and the heat dissipating fins are projected from the front of the unit case to the outside, and a semiconductor element that requires heat dissipation is attached to the electronic component mounting surface of the heat sink located in the case. ing.

  The illustrated control unit 9 is arranged with one long side 903a of the unit case 903 facing upward. As shown in FIG. 4, the positive side DC terminal ta and the negative side DC terminal tb are provided at the upper end of the unit case 903 at a predetermined interval, and these DC terminals have screw holes 905 and 906 is provided. Further, three-phase AC side terminals tu to tw are provided on the side surface on one end side in the longitudinal direction of the unit case 903. These AC side terminals are also provided with screw holes, and terminal fittings provided at one ends of the electric wires 12u to 12w connecting between the controller and the terminals of the armature coils Lu to Lw are AC side terminals tu. Or screwed to tw. Couplers 907 and 908 for connecting signal lines for supplying various signals to the controller 902 are attached to the lower end of the unit case 903.

  3 and 4, a substantially cylindrical bulge 909 provided on the front surface of the unit case 903 accommodates a capacitor (not shown in FIG. 1) connected between the DC side terminals of the driver 901. It is a part that.

  The battery 8 accommodates the electrode plate group and the electrolyte in the battery case 801, and is positioned on the upper surface of the battery case 801 near one end in the width direction (closer to the front face of the battery case). And the positive electrode terminal 802 and the negative electrode terminal 803 are provided in the state located near the both ends of the longitudinal direction of the battery case 801. Screw holes 802a and 803a are formed in the axial center portions of the positive electrode terminal 802 and the negative electrode terminal 803, respectively. A plurality of liquid plugs 804, 804,... Are arranged side by side at the center of the upper surface of the battery case 801. On the upper surface of the battery case 801, a rectangular parallelepiped protrusion 805 extending in the longitudinal direction of the battery case between the positive electrode terminal 802 and the negative electrode terminal 803 is formed in a state of being positioned closer to the front surface of the battery case. Partition walls 805a and 805b are formed integrally at both ends in the longitudinal direction of the portion 805 so as to partition between the positive electrode terminal 802 and the liquid port plug and between the negative electrode terminal 803 and the liquid port plug, respectively. Further, a substantially rectangular parallelepiped protrusion 806 extending substantially over the entire length of the battery case is formed on the upper surface near the back surface of the battery case, and one end of the protrusion 806 protrudes in the length direction of the protrusion. The alignment protrusion 806a is formed.

  In the present invention, the control unit 9 is disposed at a position adjacent to the battery 8, and the vehicle-mounted battery / electric unit combination structure 20 is configured by the battery 8 and the control unit 9. The positive terminal and the negative terminal of the battery 8 are connected to the positive DC terminal ta and the negative DC terminal tb of the control unit 9 through a positive bus bar and a negative bus bar made of a conductive plate, respectively.

  In this embodiment, as shown in FIGS. 3 and 4, a case main body 21 having an upper end opened and an insulating resin cover 22 arranged so as to close the upper end opening of the case main body 21 are provided. A battery case 23 is provided, and this battery case is attached to the vehicle 1 driven by the engine 2 as shown in FIG.

  A vehicle 1 shown in FIG. 2 is an ATV similar to that shown in FIG. 8, and includes a vehicle body 3 on which an engine 2 is mounted, a pair of front wheels 5 operated by a handle 4, and a pair of rear wheels 6. The front wheel 5 and the rear wheel 6 are driven by the engine 2. A starter generator 7 is attached to the engine 2.

  The case main body 21 is formed in the shape of a rectangular parallelepiped having an internal space in which the battery 8 can be inserted with almost no gap, and an outer flange 21a is formed at the peripheral edge of the upper end. Through holes 21b and 21b are formed at both end corners of the flange 21a located on the back side of the case body, and through holes 21b 'and 21b' are formed at both end corners of the flange 21a located on the front side of the case body. ing. These through holes are used to pass bolts for fixing the case body to a frame which will be described later. In order to reinforce the case main body 21, a large number of pleats 21c are formed on the side surface.

  Further, on the side surface on the front side of the case body 21, there are first and second stays 21 d and 21 d ′ that hold the unit case 903 of the control unit 9 in a state of being held, and both corners on the lower end side of the unit case 903. A unit holder comprising a pair of support members 21e that contact from below and support the unit case is attached. The stays 21 d, 21 d ′ and the support 21 e are made of metal, and are fixed to the case body 21 while being cast into the case body 21.

  The first stay 21d is formed in the shape of a tongue piece, and is provided in a pair on the one end side of the front surface of the case body with a predetermined interval in the vertical direction. These stays 21d are connected to the AC side terminals tu to tw of the unit case 903. Is brought into contact with the side surface 903b on the side provided with. The second stay 21d 'is made of an L-shaped member whose tip 21d1' is bent at right angles to the first stay 21d side, and a pair of second stays 21d 'is provided on the other end side of the front surface of the case body with a vertical spacing. These stays 21 d ′ are engaged with the side surface 903 c opposite to the side surface 903 b of the unit case 903 and the front surface of the unit case 903. The control unit 9 is held by the case body 21 with both lower ends of the unit case 903 placed on the support 21e and the stays 21d and 21d 'being in contact with the side surfaces 903b and 903c of the unit case 903, respectively. .

  A groove 21f for fitting an alignment protrusion 806a provided on the battery 8 is formed on the inner surface of the case body 21, and the protrusion 806a is only inserted when the battery 8 is inserted into the case body 21 in the correct orientation. Is fitted into the groove 21f to allow the battery 8 to be inserted into the case main body 21.

  The cover 22 is a shallow box-shaped resin molded product having a rectangular top plate portion 22a and a side wall portion 22b protruding downward from the outer peripheral portion of the top plate portion, and covers the upper end of the case body 21. The side wall portion 22b is dimensioned so that the side wall portion 22b fits into the outer periphery of the flange 21a at the upper end of the case body 21 without any gap. On the front side wall portion of the cover 22, there is an overhanging portion 22c that overhangs above the control unit 9 held by the unit holder of the case main body 21 when the cover is attached to the upper end of the case main body 21. Is formed. The overhang portion 22c is formed with a thickness smaller than that of the other portion of the cover 22, and a step is formed between the other portion of the cover 22 and the overhang portion 22c.

  Concave portions 22d and 22e that match the positive side DC terminal ta and the negative side DC terminal tb of the control unit 9 are formed across the projecting portion 22c and a part of the side wall portion on the front side of the cover. In addition, in the portion of the cover 22 near the front surface of the top plate portion 22a, concave portions 22f and 22g are formed which are respectively aligned with the positive electrode end 802 and the negative electrode terminal 803 of the battery inserted into the case body. Further, through holes 22h and 22h that are respectively aligned with through holes 21b and 21b provided in the flange of the case main body are formed at both ends of the portion near the back surface of the cover 22. At both ends of the overhanging portion 22c, through holes 22h ′ and 22h ′ for passing bolts for fixing the frame of the cover 22 to be described later are formed.

  The cover 22 is also casted with a positive electrode bus bar 25 and a negative electrode bus bar 26 formed of a conductive plate made of a highly conductive material such as copper. As shown in FIG. 6B, the positive electrode bus bar 25 has a L-shaped first portion 25a and a plate surface perpendicular to the plate surface of the first portion 25a on the tip side. A conductive plate that is integrally formed with a second portion 25b having a widthwise end near the rear end connected to the tip of the portion 25a, and a rear end of the first portion 25a and Holes 25c and 25d are formed through the tip of the second portion 25b, respectively.

  Further, as shown in FIG. 6A, the negative electrode bus bar 26 has a first portion 26a formed in an L shape and a plate surface orthogonal to the plate surface of the first portion, and has a rear end portion. One end in the width direction of the closer portion is a band-shaped second portion 26b integrated with the tip portion of the first portion 26a, and an L-shape with a rear end portion integrated with the tip of the second portion 26b. The conductive plate is formed to have a third portion 26c. A hole 26d is formed through the rear end portion of the first portion 26a of the negative electrode bus bar 26, and a hole 26e and a rear end portion of the second portion 26b and a front end portion of the third portion 26c are respectively penetrated. 26f is formed.

  The positive bus bar 25 is cast in the cover 22 with its hole 25c positioned in the cover recess 22f and the hole 25d positioned in the recess 22d. The negative electrode bus bar 26 has holes 26d and 26e positioned in the cover recesses 22g and 22e, respectively, and, as shown in FIG. 7, the hole 26f is provided near the recess 22e. 'And the periphery of the hole 26f is cast into the cover 22 in a state where it is exposed to the lower surface of the overhang portion 22c.

  Then, with the cover 22 attached to the case main body 21, the holes 25c and 25d of the positive electrode bus bar 25 are respectively connected to the screw hole 802a and the unit holder of the axial center portion of the positive electrode terminal 802 of the battery 8 inserted into the case main body. The holes 26d and 26e of the negative electrode bus bar 26 are aligned with the screw holes 803a of the negative electrode terminal 803 of the battery 8 and the screw holes 803a of the control unit 9, respectively. The positive side bus bar 25 and the negative side bus bar 26 are positioned so as to align with the screw hole 906 of the negative side DC terminal tb.

  In order to attach the battery case 23 to the vehicle body, a U-shaped metal frame 24 including arm portions 24A and 24B extending in parallel with each other and a connecting portion 24C for connecting one end of these arm portions is positioned in the vicinity of the starter generator 7. In this state (see FIG. 2), a part of the vehicle body 3 is provided integrally with the vehicle body. The frame 24 has a battery case case 21 fitted between the arm portions 24A and 24B, and the upper end flange 21a of the case body 21 is placed on the arm portions 24A and 24B and the connecting portion 24C. The case 23 is held. The arm portions 24A and 24B of the frame 24 have screw holes 24b and 24b that are respectively aligned with the through holes 21b and 21b provided in the flange portion of the case main body 21, and the through holes 21b provided in the flange portion of the case main body 21. Screw holes 24b 'and 24b' which are respectively aligned with 'and 21b', and screw holes 24h 'and 24h' which are respectively aligned with the through holes 22h and 22h 'formed at both ends of the cover protruding portion 22c. Yes.

  In the present embodiment, the battery 8 is housed in the case body 21 fixed to the vehicle body 3 by the frame 24, the control unit 9 is held by the unit holder on the front surface of the case body, and the cover 22 is attached to the case body 21. Attach and connect between the positive terminal 802 of the battery and the positive DC terminal ta of the control unit and between the negative terminal 803 of the battery and the negative DC terminal tb of the control unit by the positive bus bar 25 and the negative bus bar 26. By doing so, the in-vehicle battery / electric unit combination structure 20 is configured.

  The battery / electric unit combination structure 20 according to this embodiment is attached to the vehicle body 3 according to the following procedure. First, the case main body 21 is inserted between the arm portions 24A, 24B of the frame 24, the flange 21a is placed on the frame 24, and the bolts 31 passed through the through holes 21b ', 21b' provided in the flange 21a, The case body 21 is fixed to the frame 21 by screwing 31 into the screw holes 24 b ′ and 24 b ′ of the frame 24. Next, the battery 8 is inserted into the case body 21 while the alignment protrusion 806a of the battery 8 is inserted into the groove 21f of the case body 21, and the control unit 9 is held by the unit holder on the front surface of the case body. Either the insertion of the battery into the case body or the attachment of the electric unit may be performed first.

  Next, the cover 22 is put on the upper end of the case body 21, and the bolts 32 and 32 ′ passing through the hole 25 c of the positive electrode bus bar 25 and the hole 26 d of the negative electrode bus bar 26 are connected to the positive terminal 802 and the negative terminal 803 of the battery 8. The bus bars 25 and 26 are screwed into the screw holes 802a and 803a to connect the positive terminals 802 and 803 of the battery. Also, the bolts 33 and 33 'penetrating the hole 25d of the positive electrode bus bar 25 and the hole 26e of the negative electrode bus bar 26 are screwed into the screw holes 905 and 906 of the positive side DC terminal ta and the negative side DC terminal tb of the electric unit. Thus, the positive bus bar 25 and the negative bus bar 26 are connected to the positive DC terminal ta and the negative DC terminal tb.

  Thereafter, bolts 34, 34, which penetrate through the through holes 22h, 22h of the cover 22 and the through holes 21b, 21b of the flange of the case body 21, are screwed into the screw holes 24b, 24b of the frame 24, and the through holes 22h of the cover 22 The battery 22 and the electric unit combined structure are fastened by fastening the cover 22 to the flange 21a of the case body 21 and the frame 24 by screwing the bolts 35 and 35 through which 'and 22h' are passed into the screw holes 24h 'and 24h' of the frame 24. Complete the assembly of the body 20. By screwing the bolt 35 into the screw holes 24 h ′ and 24 h ′ of the frame 24, the negative electrode bus bar 26 is electrically connected to the metal frame 24, whereby the negative electrode terminal of the battery 8 is grounded to the vehicle body 3.

  After assembling the battery / electrical unit combination structure 20 as described above, the three-phase AC terminals tu to tw of the control unit 9 and the starter generator 7 are connected through the three-phase electric wires 12u to 12w.

  As described above, when the battery 8 and the control unit (electric unit) 9 are connected via a bus bar at a close distance, the wiring resistance between the battery 8 and the control unit can be minimized. Therefore, the loss in the wiring resistance can be reduced, and power can be efficiently supplied from the battery to the electric load. In the above embodiment, when starting the engine, it is necessary to flow a large current of about 140 A from the battery 8 through the driver of the control unit. When flowing such a large current, there is a problem between the battery and the control unit. Loss in wiring resistance becomes extremely large. According to the present invention, since the battery and the control unit can be connected at a close distance via the bus bar, the wiring resistance between the battery and the control unit can be minimized, and a large current can be applied. Loss can be minimized.

  As described above, when the battery 8 and the control unit 9 are connected via the bus bars 25 and 26 made of conductive plates, the battery 8 and the driver of the electric unit can be connected to each other without using thick wires that are troublesome to route. They can be electrically connected.

  Further, since the battery 8 and the control unit 9 can be connected to each other through a bus bar made of a conductive plate at a close distance, the bus bars 25 and 26 are greatly vibrated by vibration transmitted from the vehicle, and the battery and the electric unit are It is possible to prevent the connection portion between them from being loosened or disconnected.

  Further, in the above embodiment, the battery 8 cannot be inserted into the case main body 21 unless the battery 8 is oriented correctly, and if the battery 8 is not inserted into the case main body 21 in the correct orientation, the cover 22 is cast. Since the inserted bus bars 25 and 26 cannot be connected to the positive terminal and the negative terminal of the battery, the possibility that the battery is connected to the electric unit in the reverse direction can be eliminated. Therefore, it is possible to reduce the size of the control unit 9 and reduce the cost by eliminating the need to provide a protective device in the control unit 9 in case the battery is reversely connected.

  In the above embodiment, the battery case is provided with the alignment projection 806a on the battery case and fitted into the groove 21f on the inner surface of the case body 21 so that the battery 8 is always in the correct orientation in the case body 21. However, in the above embodiment, the battery 8 is placed in the reverse direction by providing the positive terminal and the negative terminal of the battery so as to be shifted to the same end in the width direction of the battery case. When inserted into the main body 21, the bus bars 25 and 26 cast into the cover 22 cannot be connected to the positive terminal 802 and the negative terminal 803 of the battery, so the alignment protrusion 806a and the groove 21f are omitted. Even so, reverse connection of the battery can be prevented.

  In the above embodiment, the peripheral part of the hole 26f provided in the negative electrode bus bar 26 for passing the bolt 35 for fixing the negative electrode bus bar 26 to the metal frame 24 is exposed to the lower surface of the overhang part 22c of the cover. In this state, when the cover is fastened to the metal frame 24 with the bolt 35, the negative electrode bus bar 26 is in contact with the metal frame 24. Therefore, even if an insulating material is used as the bolt 35, the negative electrode bus bar is used. 26 can be grounded to the vehicle body 3 through the frame 24.

  The structure for grounding the negative electrode bus bar to the vehicle body is not limited to the above example. For example, the peripheral portion of the hole 26f provided in the negative electrode bus bar 26 for passing the bolt 35 for fastening the cover to the metal frame 24 is provided so as to be exposed on the upper surface of the overhang portion 22c of the cover, and the bolt 35 is made of metal. Also, the negative electrode bus bar 26 can be electrically connected to the frame 24 and grounded to the vehicle body by contacting the head of the bolt 35 with the peripheral portion of the hole 26f of the negative electrode bus bar. it can.

  In the above embodiment, the case where the electric unit held in the battery case is the control unit of the starter generator is taken as an example. However, the electric unit held in the battery case receives the voltage supplied from the generator to the battery through the rectifier circuit. Other units such as a voltage regulator unit that is controlled so as to be kept below the set value may be used. The present invention is particularly useful when the electrical unit is a unit that needs to pass a large current.

It is the circuit diagram which showed the electrical structure of the starter generator used in embodiment of this invention, and its control unit. It is the perspective view which showed an example of the state which mounted the battery-electrical unit combination structure concerning this invention in the vehicle body. It is a perspective view in the assembled state of the battery and electric unit combination structure concerning this embodiment. It is a disassembled perspective view of the battery / electric unit combination structure. It is the perspective view which showed the cover of the battery case used by this embodiment. (A) And (B) is the perspective view which showed the bus bar for negative electrodes and the bus bar for positive electrodes which are each used by embodiment of this invention. It is sectional drawing which abbreviate | omitted and showed the connection part of the cover and controller of a battery case used by this embodiment. It is the perspective view which showed the state which arrange | positioned the electric unit connected to a battery away from the battery, and was attached to the vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine 3 Car body 7 Starter generator 8 Battery 802 Positive electrode terminal 803 Negative electrode terminal 9 Control unit (electric unit)
901 Driver 902 Controller 20 In-vehicle battery / electric unit combination structure 21 Case body 22 Cover 23 Battery case 24 Frame 25 Positive electrode bus bar 26 Negative electrode bus bar

Claims (6)

Connected to the battery in a unit case provided with a battery attached to the vehicle body of the vehicle driven by the engine, and a positive DC terminal and a negative DC terminal connected to the positive terminal and the negative terminal of the battery, respectively. An in-vehicle battery / electric unit combination structure including an in-vehicle electric unit in which components of an electric circuit are housed,
The electrical unit is located adjacent to the battery;
A battery / electric unit combination structure in which a positive terminal and a negative terminal of the battery are connected to a positive DC terminal and a negative DC terminal of the electric unit through a positive bus bar and a negative bus bar, respectively.   Only when the positive terminal and the negative terminal of the battery are disposed at predetermined positions with respect to the positive DC terminal and the negative DC terminal of the electrical unit, respectively, the positive bus bar and the negative bus bar are connected to the battery. The in-vehicle battery / electric unit combination structure according to claim 1, wherein the structure is connectable to a corresponding terminal of the electric unit. Connected to the battery in a unit case provided with a battery attached to the vehicle body of the vehicle driven by the engine, and a positive DC terminal and a negative DC terminal connected to the positive terminal and the negative terminal of the battery, respectively. An in-vehicle battery / electric unit combination structure including an in-vehicle electric unit in which components of an electric circuit are housed,
A battery case having an outer unit holder for holding the electric unit is provided, the battery is accommodated in the battery case, and the electric unit is held in the unit holder,
When the battery is accommodated in the battery case, the positions of the positive terminal and the negative terminal of the battery are uniquely determined, and when the electric unit is held by the unit holder, the positive side DC terminal of the electric unit and The battery case and the unit holder are configured so that the position of the negative side DC terminal is uniquely determined,
A positive bus bar comprising a conductive plate between the positive DC terminal of the electric unit held by the unit holder and the positive terminal of the battery and between the negative DC terminal of the electric unit and the negative terminal of the battery; In-vehicle battery / electric unit combination structure connected via a bus bar for negative electrode. Connected to the battery in a unit case provided with a battery attached to the vehicle body of the vehicle driven by the engine, and a positive DC terminal and a negative DC terminal connected to the positive terminal and the negative terminal of the battery, respectively. An in-vehicle battery / electric unit combination structure including an in-vehicle electric unit in which components of an electric circuit are housed,
The vehicle body of the vehicle is provided with a case body having a unit holder for holding the electric unit on a side surface and having an upper end opened, and an insulating resin cover disposed so as to close the upper end opening of the case body. A battery case to be attached is provided,
While the battery is housed in the case body of the battery case, the electric unit is held by the unit holder,
The positive side DC terminal and the negative side DC terminal are provided on the upper part of the electric unit held by the unit holder,
A positive bus bar provided so that one end and the other end of the cover are placed on the positive terminal of the battery and the positive DC terminal of the electric unit when the cover is put on the upper end of the case body; A negative electrode bus bar provided so that one end and the other end of the case body are placed on the negative electrode terminal of the battery and the negative electrode side DC terminal of the electric unit when it is put on the upper end of the case body is cast into the cover Provided in a rare state,
One end of each of the positive electrode bus bar and the negative electrode bus bar is connected to the positive electrode terminal and the negative electrode terminal of the battery by a bolt, and the other end of each of the positive electrode bus bar and the negative electrode bus bar is a positive side DC of the electric unit. An in-vehicle battery / electric unit combination structure connected to a terminal and a negative side DC terminal by a bolt. A metal frame fixed to the vehicle body is provided, and the battery case is fixed to the metal frame with a bolt,
The in-vehicle battery / electric unit combination according to claim 4, wherein when the battery case is fixed to the metal frame, the negative electrode bus bar is grounded to the vehicle body of the vehicle via the metal frame. Structure. The engine comprises a starter generator;
The electric circuit of the electric unit converts an AC output supplied from the armature coil through the AC side terminal to a DC output when the starter generator is operated as a generator, and converts the DC output to the positive side DC terminal and A full-wave rectifier circuit supplied to the battery from a negative DC terminal and a DC output supplied from the battery through the positive DC terminal and the negative DC terminal when the engine is started are operated as the motor. A circuit comprising a driver having an inverter-type switch circuit that converts the drive current necessary for the operation into the armature coil and converts the drive current to the armature coil, and a controller that controls the driver The in-vehicle battery / electric unit combination structure according to claim 1, 2, 3, 4, or 5. .

Images