JP2018098150A - Vehicle battery system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve high safety and reliability over a long period of time by preventing a core wire of a wire harness arranged close to a metal exposed surface of an outer case from being in contact with the metal exposed surface of the case.SOLUTION: A wire harness 1 that insulates the surface with an insulation coating is arranged in a wiring space 8 provided inside a metal exposed surface 6E of an inner surface of the case, and in the wiring space 8, an insulation wall 12 is provided between the wire harness 1 and the metal exposed surface 6E, and a core wire of the wire harness 1 is provided in the wiring space 8 by double insulation between the insulation wall and the insulation coating on the surface.SELECTED DRAWING: Figure 3

Description

  The present invention is a battery system including a secondary battery, which is mounted on a vehicle and connected in parallel to an electrical battery to supply power to electrical components, or a large number of secondary batteries are connected in series. The present invention relates to a battery system for a vehicle that supplies power to a traveling motor having a high output voltage.

In a battery system mounted on a vehicle, a plurality of secondary batteries and a wire harness connected to the secondary battery and the circuit board are arranged in a wiring space provided in the outer case. (See Patent Document 1)
Battery systems mounted on vehicles receive vibrations and shocks and receive acceleration in a three-dimensional direction, so flexible and freely deformable wire harnesses are installed in the wiring space provided in the exterior case. It is arranged. Furthermore, a metal outer case is used in order to realize sufficient strength against vibration and impact and to efficiently dissipate the heat energy generated by the internal heating element to the outside.

JP 2008-270121 A

  In a battery system for a vehicle, the wire harness may be wired close to the inner surface of the metal outer case, that is, the exposed metal surface of the outer case, due to restrictions such as space efficiency. Since the surface of the wire harness is covered with an insulating coating, there is no failure to contact the metal outer case in a use environment that is not subject to vibration, such as an indoor use environment. However, a vehicle battery system is used in an environment in which road surface irregularities during traveling are constantly vibrated by an engine that reciprocates, and is used in an environment that is subject to vibrations and impacts over a considerably long period of time. In addition, the battery system for vehicles is used in a severe external environment that is heated by a heat generating element in the outer case and also heated from the engine and the outside. When the wiring harness that is routed close to the exposed metal surface rubs against the exposed metal surface and breaks the insulation coating, the core wire of the wiring harness comes into contact with the exposed metal surface, causing short circuits, electrical leakage, ignition, electronic components, etc. Since it causes a failure, it is important to prevent contact between the wire harness and the exposed metal surface in any operating environment.

  The present invention was developed for the purpose of eliminating the drawbacks of conventional battery systems for vehicles, and an important object of the present invention is to place the wire harness close to the exposed metal surface of the outer case. In addition to improving space efficiency, the wire harness core wire can be reliably prevented from coming into contact with the exposed metal surface even in harsh vehicle environments that are subject to vibrations and shocks and heated to high temperatures. An object of the present invention is to provide a vehicle battery system capable of realizing high safety and reliability over a period of time.

  The battery system for vehicles of this invention has accommodated the wire harness and the secondary battery in the exterior case which has a metal exposed surface inside. The exterior case is provided with a wiring space for the wire harness inside the exposed metal surface, and the wire harness is disposed close to the exposed metal surface. A wire harness whose surface is insulated with an insulation coating is routed in the wiring space. In the wiring space, an insulating wall is provided between the wire harness and the exposed metal surface, and the exposed metal surface through the insulating wall. Wire harness is placed in the wiring space. The above wire harness is insulated with the insulation coating on the surface of the core wire, further insulated from the exposed metal surface with an insulation wall, and double insulated with the insulation coating and the insulation wall to wire the core wire of the wire harness Arranged in space.

  The battery system for a vehicle according to the present invention can have a structure in which the wire harness has a curved portion, and the wire harness is biased toward the metal exposed surface by the restoring force of the curved portion. Can be arranged outside the wiring space. Moreover, the above structure fixes the edge part of a wire harness to the predetermined position in an exterior case via the connection tool of a connection terminal or a connector, curves a wire harness with a connection tool, and arrange | positions it in wiring space. be able to.

  The battery system for a vehicle of the present invention can be provided by providing a plastic battery holder in which a secondary battery is disposed at a fixed position in an exterior case and integrally forming an insulating wall on the battery holder.

  The battery system for a vehicle according to the present invention includes a metal exposed surface on the inner surface of the peripheral wall, an insulating wall in a posture parallel to the peripheral wall at a position facing the peripheral wall, and between the metal exposed surface of the peripheral wall and the insulating wall. A wire harness can be placed.

  The battery system for a vehicle according to the present invention includes a heat generating element disposed in an outer case, a metal outer case whose inner surface is a metal exposed surface is used for the outer case, and the heat generating element is thermally coupled to the metal outer case. A structure in which the heat energy of the heat generating element is thermally conducted to the metal outer case and radiated to the outside can be obtained.

  In the vehicle battery system of the present invention, an air layer is provided between the insulating wall and the exposed metal surface, so that the insulating wall and the exposed metal surface are not thermally coupled.

  In the above battery system for vehicles, the wire harness placed close to the exposed metal surface of the outer case is subjected to vibrations and shocks and exposed to high temperatures. There is a feature that high safety and reliability can be realized over a long period of time without touching. This is because the above battery system wires the wiring harness in the wiring space inside the exposed metal surface of the outer case, and an insulating wall is provided between the wiring harness and the exposed metal surface. This is because the exposed surface is double-insulated by both the insulating coating of the wire harness and the insulating wall. Further, in the battery system described above, the insulating wall is not required to be flexible like the insulating coating, and can be formed of hard plastic that is tougher than the insulating coating, and is formed thick to form the wire harness and the exposed metal surface. There is a feature that can be insulated in an ideal state.

1 is an exploded perspective view of a battery system according to an embodiment of the present invention. It is a top view except the lid case of the battery system of FIG. It is the perspective view which looked at the part shown with the dashed line of FIG. 2 from the top. It is the perspective view of FIG. 3 which isolate | separated the battery holder up and down. It is a schematic sectional drawing of the battery system shown in FIG. It is a bottom perspective view of the battery system shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments shown below exemplify a vehicle battery system for embodying the technical idea of the present invention, and the present invention specifies the vehicle battery system as the following structure and material. do not do.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The battery system for vehicles of the present invention is connected in parallel with an electrical equipment battery mounted on the vehicle, or is mounted on the vehicle and used as a power source for supplying electric power to the travel motor. The battery system of the following embodiment is used by connecting the output voltage in parallel with the battery for electrical equipment, with the output voltage being, for example, 12V. A battery system that supplies electric power to a travel motor has a large number of secondary batteries connected in series, for example, an output voltage of 100V to 400V.

  The exploded perspective view seen from the top of FIG. 1, the top view except the lid outer case of FIG. 2, the partially enlarged perspective view shown in FIGS. 3 and 4, the schematic cross-sectional view of FIG. The battery system shown in the exploded perspective view seen from below realizes an outer case 6, a secondary battery 4, a battery holder 7 that places the secondary battery 4 in a fixed position, a protection circuit for the secondary battery 4, and the like. A circuit board 5 on which electronic components are mounted, and a wire harness 1 that is directly or indirectly connected to the circuit board 5, the secondary battery 4, the lead plate 9, and the like are provided. The wire harness 1 is a bundle of a plurality of lead wires 1A.

  The secondary battery 4 is a nickel metal hydride battery. However, the secondary battery may be a currently used secondary battery such as a lithium ion secondary battery, or any other secondary battery to be developed in the future. Since the figure details the battery system used in parallel with the lead battery, the secondary battery 4 is a nickel metal hydride battery, and 10 secondary batteries 4 are placed in place by the battery holder 7. Yes. Ten secondary batteries 4 are connected in series, and the rated voltage is 12 V of a lead battery.

  The outer case 6 is composed of a first case 6A and a second case 6B which are divided vertically in FIGS. In the figure, the first case 6A is a bottom case, and the second case 6B is a lid case that closes the opening of the first case 6A. 1 has the first case 6A as a bottom case and the second case 6B as a lid case, but the first case 6A can be a lid case and the second case 6B can be a bottom case.

  The first case 6A is made of metal that efficiently dissipates heat from the heating element 2 mounted on the surface of the circuit board 5. The second case 6B is made of plastic to reduce the weight of the outer case. The first case 6A is made of metal, has a peripheral wall 6C around the surface plate portion 6D, and the surface plate portion 6D and the inner surface of the peripheral wall 6C serve as a metal exposed surface 6E. The exposed metal surface 6E of the surface plate portion 6D is thermally coupled to the circuit board 5 on which the heat generating element 2 is mounted, and conducts the heat energy of the heat generating element 2 to the metal first case 6A. The first case 6A made of metal radiates heat energy conducted from the surface to the outside. The first case 6A is made of aluminum die-casting having a surface plate portion 6D and a peripheral wall 6C as an integral structure. The surface plate portion 6D has a heat radiating plate portion 6F for thermally coupling the heat generating element 2 and a battery holder 7 fixed thereto. The fitting part which fits in a position is provided.

  As shown in the exploded perspective view of FIG. 1 and the schematic sectional view of FIG. 5, the heat radiating plate portion 6 </ b> F is disposed at a position facing the heating element mounting portion of the circuit board 5. Further, the heat radiating plate portion 6 </ b> F is provided with a heat conducting space between the heat generating element mounting portion of the circuit board 5. The heat conductive space 3 is filled with the heat conductive insulating gel 3. The heat conductive insulating gel 3 is obtained by dispersing heat conductive powder such as aluminum oxide or zinc oxide in a binder oil. The heat conductive insulating gel 3 thermally couples the heat generating element mounting portion of the circuit board 5 and the heat radiating plate portion 6F, and conducts the heat energy of the heat generating element 2 to the heat radiating plate portion 6F. Since the circuit board 5 fixes the heat generating element 2 on the front surface and the back surface is thermally coupled to the heat radiating plate portion 6F, the heat energy of the heat generating element 2 is transferred from the circuit board 5 to the heat conductive insulating gel 3. 3 is conducted to the heat radiating plate portion 6F.

  The heat conductive insulating gel 3 conducts the heat energy of the heat generating element 2 mounted on the circuit board 5 to the heat radiating plate portion 6F while insulating the circuit board 5 and the heat radiating plate portion 6F. The gel-like heat conductive insulating gel 3 is freely deformed and adheres closely to the back surface of the circuit board 5 and the surface of the heat radiating plate portion 6F. Accordingly, the heat conductive insulating gel 3 is applied to the surface of the heat radiating plate portion 6F with a predetermined thickness, and the circuit board 5 is pressed against the surface of the heat radiating plate portion 6F to be in close contact with the back surface of the circuit board 5 and the surface of the heat radiating plate portion 6F.

  Since the heat conductive insulating gel 3 conducts heat while keeping the circuit board 5 and the heat radiating plate portion 6F in an insulated state, the heat conducting plate portion 6F can be insulated without insulating the back surface of the circuit board 5 and the surface of the heat radiating plate portion 6F. The circuit board 5 that is directly applied to the front surface and the back surface of which is not insulated is pressed onto the circuit board 5 so as to be in close contact with both surfaces of the circuit board 5 and the heat radiating plate part 6F. Conduct. However, it is also possible to apply an insulating film to the back surface of the circuit board 5 so as to adhere to the heat conductive insulating gel 3. Since the heat conductive insulating gel 3 insulates the circuit board 5 and is thermally coupled to the heat radiating plate part 6F, even if the insulating film on the back surface of the circuit board 5 is damaged, the circuit board 5 and the heat radiating plate part 6F are insulated and heated. Can conduct.

  The metal first case 6A is provided with heat radiating fins 6G outside the heat radiating plate portion 6F. The heat radiating fins 6G are provided on the entire heat radiating plate portion 6F, and efficiently dissipate heat energy conducted from the circuit board 5 through the heat conductive insulating gel 3 to the outside of the outer case 6. The first case 6A shown in the exploded perspective view of FIG. 3 has a heat radiating plate portion 6F protruding inside the outer case 6, and the tips of the heat radiating fins 6G are flush with the bottom surface around the heat radiating plate portion 6F. With this structure, the heat energy of the heating element 2 can be efficiently radiated to the outside without causing the heat radiating plate portion 6F to protrude from the surface of the exterior case 6.

  Furthermore, the metal first case 6A is provided with a peripheral wall 6C along the periphery of the surface plate portion 6D. The peripheral wall 6C is a metal exposed surface 6E without insulating the inner surface. The second case 6B has a peripheral wall 6C that fits with the peripheral wall 6C of the first case 6A, the second case 6B is fixed to the first case 6A, and the exterior case 6 has a closed structure inside, so that the secondary battery 4, the circuit board 5, and the wire harness 1 are accommodated.

  The battery system shown in FIGS. 1 and 2 includes two circuit boards 5 each including a first circuit board 5A and a second circuit board 5B. The first circuit board 5 </ b> A is fixed to the surface of the battery holder 7, and the second circuit board 5 </ b> B is fixed to the exterior case 6. The first circuit board 5A is mounted with a circuit for calculating the voltage, current, remaining capacity, etc. of the secondary battery 4, and the second circuit board 5B is connected to the output side of the secondary battery 4 to charge / discharge A semiconductor power switch such as a power MOSFET for turning on and off the current is mounted. The semiconductor power switch is a heating element 2 that turns on and off a large current. The second circuit board 5B shown in FIG. The heat generating element 2 is mounted on the second circuit board 5B fixed to the outer case 6. The second circuit board 5B to which the heat generating element 2 is fixed is fixed to the first case 6A so that the heat generating element mounting portion is thermally coupled to the heat radiating plate portion 6F of the first case 6A via the heat conductive insulating gel 3. Is done.

  The first circuit board 5A and the second circuit board 5B are connected by the wire harness 1. The wire harness 1 has a connector 11 coupled to both ends, and is detachably connected to the first circuit board 5A and the second circuit board 5B via the connector 11. The wire harness 1 transmits a signal indicating battery information from the first circuit board 5A to the second circuit board 5B to the second circuit board 5B. The second circuit board 5B charges and discharges while protecting the secondary battery 4 by controlling the semiconductor power switch on and off with the battery information transmitted from the first circuit board 5A.

  For example, when the remaining capacity of the discharged secondary battery 4 becomes smaller than the set capacity for stopping the discharge, a signal for stopping the discharge via the wire harness 1 is sent from the first circuit board 5A to the second circuit board 5B. And the semiconductor power switch of the second circuit board 5B is switched to the OFF state to prevent the secondary battery 4 from being overdischarged. When the remaining capacity of the secondary battery 4 being charged becomes larger than the set capacity for stopping charging, a signal for stopping charging via the wire harness 1 is sent from the first circuit board 5A to the second circuit board 5B. And the semiconductor power switch of the second circuit board 5B is switched to the OFF state to prevent the secondary battery 4 from being overcharged.

  The wire harness 1 that connects the first circuit board 5A and the second circuit board 5B is wired in the wiring space 8, and transmits battery information from the first circuit board 5A to the second circuit board 5B. In the battery system shown in the plan view of FIG. 2, a wiring space 8 is provided along the metal exposed surface 6E on the inner surface of the peripheral wall 6C, and the wiring space 8 is arranged at a position approaching the peripheral wall 6C. The wire harness 1 guided here approaches the metal exposed surface 6E on the inner surface of the peripheral wall 6C. Although the surface of the wire harness 1 is insulated with an insulation coating, if the insulation coating on the surface is damaged by rubbing against the approaching metal exposed surface 6E, the core wire contacts the metal exposed surface 6E and shorts, or the component is Failure or damage to the core wire may occur.

  Since the battery system for a vehicle is used in a very severe external environment such as being subjected to vibration or impact and being exposed to a considerably high temperature, the insulation coating cannot be completely damaged. In addition to this, the battery system for vehicles is used for an extremely long period of more than 10 years, so that the insulating coating which is an organic material deteriorates and is subject to vibration and impact in a deteriorated state. Thus, the deteriorated insulation coating is damaged and the adverse effect of contacting the metal exposed surface 6E cannot be solved.

  In the battery system described above, the wire harness 1 disposed in the wiring space 8 disposed on the inner side of the metal exposed surface 6E in order to prevent a failure in which the wire harness 1 contacts the metal exposed surface 6E for a long period of time. And an insulating wall 12 between the exposed metal surface 6E. The insulating wall 12 is made of plastic integrally formed with the battery holder 7. In the battery system of FIGS. 2 to 4, a wiring guide 13 having an insulating wall 12 as one side wall is provided in the wiring space 8. The wiring guide 13 is disposed on both sides of the elongated bottom surface with a pair of side walls including a first side wall and a second side wall arranged in a deformed posture in a vertical posture facing each other and between the metal exposed surface 6E side. The first side wall is an insulating wall 12.

  On the upper edge of the second side wall 14, a fitting recess 14 </ b> A that guides the connection terminal 10 connected to the tip of the wire harness 1 in a specific posture is provided. Further, the wiring guide 13 is disposed in the exterior case 6 in a posture extending along the metal exposed surface 6E of the peripheral wall 6C, and opens upward in FIGS. 3 and 4, and has a tip portion (in FIGS. 3 and 4). The lower right end) is also opened to guide the wire harness 1 from the opening at the end to the inside.

  The insulating wall 12 that is the first side wall is not in contact with the metal exposed surface 6E of the peripheral wall 6C, and an air layer is provided between the inner surface of the peripheral wall 6C and the metal exposed surface 6E. An air layer is provided between the surface plate portion 6D and the surface plate portion 6D without contacting the metal exposed surface 6E on the inner surface of the metal surface plate portion 6D. The wiring guide 13 is disposed through the air layer without contacting the metal exposed surface 6E of the metal outer case 6. The air layer blocks heat conduction between the metal outer case 6 and the wiring guide 13. Therefore, the wiring guide 13 is not heated by the exterior case 6 where the heat energy of the heating element 2 is conducted and the temperature rises, and the adverse effect caused by the heat of the wire harness 1 disposed here is eliminated, and the wire harness 1 is deteriorated. Can be more effectively prevented.

  The second side wall 14 is provided with a fitting recess 14 </ b> A of the connection terminal 10 connected to the wire harness 1. The connection terminal 10 is screwed to the lead plate 9 fixed to the circuit board 5 to connect the wire harness 1 to the lead plate 9. The other end of the wire harness 1 is connected to the first circuit board 5 </ b> A via the connector 11. The fitting recess 14 </ b> A is a groove shape for inserting a crimping arm portion that is connected by crimping the tip end portion of the wire harness 1, and the crimping arm portion is not rotated when the connection terminal 10 is screwed to the lead plate 9. Keep in state. In this structure, since the connection terminal 10 does not rotate when the connection terminal 10 is screwed to the lead plate 9, the connection terminal 10 can be fixed to the lead plate 9 easily and reliably. Further, the direction of the crimp arm part is specified in a state where the connection terminal 10 is fixed to the lead plate 9, the extension direction of the wire harness 1 is also specified, and the wire harness 1 is ideal for the wiring space 8 with the insulating wall 12. The feature that can be guided in a specific posture is also realized. The fitting recess 14A in FIGS. 3 and 4 guides the crimping arm in an attitude that inclines with respect to the second side wall 14 and extends the wire harness 1 in the pull-out direction. The fitting recess 14A shown in the figure guides the crimping arm portion with respect to the second side wall 14 at an inclination angle (α) of about 45 degrees, and the inclination angle (α) is set to 30 degrees to 60 degrees. Can be guided to the wiring space 8.

  The wire harness 1 that is guided to the wiring space 8 by inserting the crimping arm portion into the fitting recess 14A is curved in the wiring space 8 and guided to the wiring space 8 regardless of the inclination angle (α). The wire harness 1 acts in a direction in which the restoring force of the curved portion urges the wire harness 1 toward the metal exposed surface 6E on the inner surface of the peripheral wall 6C, but the wiring space 8 is insulated from the metal exposed surface 6E. Since the wall 12 is provided, the insulating wall 12 can prevent the adverse effect such as the core wire of the wire harness 1 being in direct contact with the metal exposed surface 6E and being short-circuited. If there is no insulating wall 12 and the wire harness 1 is directly pressed against the exposed metal surface 6E on the inner surface of the peripheral wall 6C and is subjected to vibration or impact and the insulating coating is damaged, the core wire contacts the exposed metal surface 6E and shorts. This may cause a malfunction. In particular, when the insulating coating deteriorates and becomes brittle, it is likely to cause a problem such as a short circuit, but the insulating wall 12 reliably prevents this failure.

  In addition to the wire harness 1 connected to the connection terminal 10, the wiring space 8 shown in FIG. 2 also guides the wire harness 1 connected to the connector 11 to the wiring space 8 having the insulating wall 12. In the wiring space 8, the wire harness 1 of the connection terminal 10 is arranged on the wire harness 1 connected to the connector 11 inside the insulating wall 12. This is because the fitting recess 14 </ b> A is located at the upper edge of the second side wall 14. The connection terminal 10 guided by the fitting recess 14 </ b> A arranges the connected wire harness 1 above the wiring space 8 and above the wire harness 1 connected to the connector 11. The first side wall guides the wire harness 1 connected to the connection terminal 10 in order to guide both the wire harness 1 connected to the connector 11 and the wire harness 1 connected to the connection terminal 10 into the wiring space 8. The part is raised.

  As shown in FIGS. 2 to 5, the wire harness 1 whose end is connected to the connector 11 is curved and guided to the wiring space 8. In particular, since the wire harness 1 connected to the connector 11 is bent about 90 degrees and guided to the wiring space 8, the restoring force of the bending portion 1B acts strongly, and the wire harness 1 is made of metal on the inner surface of the peripheral wall 6C. Although it works in the direction of urging toward the exposed surface 6E, since the insulating wall 12 is arranged between the metal exposed surface 6E in the wiring space 8, the wire harness 1 is directly applied to the metal exposed surface 6E by the restoring force. It contacts the insulating wall 12 without being touched. If the wire harness 1 is directly and strongly pressed against the exposed metal surface 6E on the inner surface of the peripheral wall 6C without passing through the insulating wall 12, the insulation coating is damaged and the core wire contacts the exposed metal surface 6E. Although this causes a failure, this problem is surely prevented by the structure in which the insulating wall 12 insulates the wire harness 1 from the metal exposed surface 6E. In particular, the insulating wall 12 is not required to have a flexible insulating coating, and can be molded from a hard plastic with excellent wear resistance. Insulation to prevent harmful effects such as short circuit, and achieve high safety.

  The insulating wall 12 in the wiring space 8 that insulates the wire harness 1 from the exposed metal surface 6 </ b> E is made of plastic integrally formed with the battery holder 7. The battery holder 7 shown in FIGS. 3 to 5 is integrally formed with a wiring guide 13 for guiding the wire harness 1 to provide an insulating wall 12. The wiring guide 13 is arranged in parallel in a vertical posture on both sides of the elongated bottom surface extending in the longitudinal direction of the wire harness 1 so that a pair of side walls composed of the first side wall and the second side wall 14 face each other. .

  The battery holder 7 in FIG. 1 includes a lower holder 7A and an upper holder 7B, and a wiring guide 13 is provided in the lower holder. The lower holder and the upper holder are connected to each other, and a plurality of secondary batteries 4 are arranged in a horizontal plane. The lower holder and the upper holder are connected to each other in a fixed position with a fitting structure. The battery holder 7 is formed of a hard plastic in which reinforcing fibers such as glass fibers are embedded in order to be mounted on a vehicle that receives vibration and to achieve sufficient strength. The hard plastic is a thermoplastic resin such as polybutylene terephthalate resin (PBT) which is a polyester-based engineering plastic. Molded with plastic. The battery holder 7 is arranged at a fixed position with the secondary battery 4 sandwiched between the lower holder 7A and the upper holder 7B.

  The lower holder 7A is integrally formed with a wiring guide 13 including an insulating wall 12. The wiring guide 13 formed integrally with the battery holder 7 is formed of a tough plastic and has the same strength as the battery holder 7. The wiring guide 13 is integrated with the battery holder 7, and the structure in which the wire harness 1 guided to the wiring guide 13 is connected to the circuit board 5 fixed to the battery holder 7 connects the wire harness 1 and the wire harness 1. Without causing relative movement with respect to the circuit board 5, it is possible to prevent deformation and movement of the wire harness 1 due to vibration and impact, and to prevent failures caused by these.

  The lower holder 7A in FIGS. 3 and 4 is provided with a wiring guide 13 that protrudes from a battery holding portion (the upper left portion in the figure) in which a plurality of batteries are arranged horizontally. The battery holding part is formed into a five-row groove shape in which a plurality of cylindrical batteries are set at fixed positions, and the two cylindrical batteries that are the secondary batteries 4 are arranged in a straight line and arranged at the fixed positions. In addition, an opening 15 is formed on the bottom surface of the battery holding portion, and the opening 15 serves as a vent hole for cooling the secondary battery 4. In addition, it is good also as a structure which arrange | positions the heat conductive member 15 in the opening part 15, and interposes the heat conductive member 16 between the secondary battery 4 and 1st case 6A. According to this configuration, the secondary battery 4 can be cooled by transferring heat from the secondary battery 4 to the metal first case 6 </ b> A via the heat conducting member 16.

  Further, the lower holder 7A in FIG. 1 is provided with a board space for arranging the second circuit board 5B beside the battery holding part (lower right in FIG. 1). The second circuit board 5B is fixed to the bottom case and disposed in the board space. The wiring guide 13 is adjacent to the board space, protrudes from the battery holding portion, and is disposed and provided in the wiring space 8 inside the peripheral wall 6C. As shown in the plan view of FIG. 2, the lower holder 7 </ b> A is provided with the wiring guide 13 in an integrated structure so that the first side wall, which is the insulating wall 12, is arranged on the same plane as the side surface of the battery holding part. The wiring guide 13 disposed adjacent to the board space guides the wire harness 1 connected to the second circuit board 5B fixed to the board space via the connection terminal 10 and the connector 11.

  The upper holder 7B is provided with five rows of grooves on the lower surface, and two secondary batteries 4 are arranged in a straight line in each row and arranged at fixed positions. The upper holder 7B is also provided with a plurality of vent holes for cooling the secondary battery 4. Further, the upper holder 7B is provided with a boss for fixing the circuit board 5 on the upper surface. The bosses are arranged at the four corners of the circuit board 5, and the four corners of the circuit board 5 are fixed to the upper holder 7B with screws. Furthermore, the upper holder 7B is provided with a boss for fixing the lead plate 99, and a lead plate 9 made of a thick metal plate is fixed thereto.

  In the upper holder 7B, the sub-wire harness 21 that connects the output lead plate 9 and the first circuit board 5A is disposed inside the case away from the exposed metal surface.

The above battery system is assembled in the following steps.
1. A battery holder 7 in which a plurality of secondary batteries 4 are arranged at fixed positions is fixed by screwing to a lower exterior case 6, and the first circuit board 5 A is attached to the battery holder 7 and the second circuit board 5 B. Is fixed to the outer case 6 with screws, and the lead plate 9 is also fixed with screws.
2. The wire harness 1 and the sub-wire harness 21 are connected to the circuit board 5 and the lead plate 9 via the connector 11 and the connection terminal 10.
3. The wire harness 1 is guided to the wiring guide 13 in the wiring space 8, and the insulating wall 12 is disposed between the wire harness 1 and the metal exposed surface 6E on the inner surface of the peripheral wall 6C. Further, the sub wire harness 21 is disposed inside the case.
4). Finally, the outer case 6 is sealed by connecting the second case to the first case.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used for a vehicle battery system in which a wire harness is built in an exterior case.

DESCRIPTION OF SYMBOLS 1 ... Wire harness 1A ... Lead wire 1B ... Bending part 2 ... Heat generating element 3 ... Thermal conduction insulating gel 4 ... Secondary battery 5 ... Circuit board 5A ... 1st circuit board 5B ... 2nd circuit board 6 ... Outer case 6A ... 1st case (bottom case)
6B ... 2nd case (lid case)
6C ... peripheral wall 6D ... surface plate 6E ... metal exposed surface 6F ... heat dissipation plate 6G ... heat dissipation fin 7 ... battery holder 7A ... lower holder 7B ... upper holder 8 ... wiring space 9 ... lead plate 10 ... connection terminal 11 ... connector 12 ... Insulating wall (first side wall)
DESCRIPTION OF SYMBOLS 13 ... Wiring guide 14 ... 2nd side wall 14A ... Fitting recessed part 15 ... Opening part 16 ... Heat conduction member 21 ... Sub wire harness

Claims (8)

A battery system for a vehicle in which a wire harness and a secondary battery are housed in an exterior case having a metal exposed surface inside,
The outer case has a wiring space for the wire harness inside the exposed metal surface,
In the wiring space, the wire harness formed by insulating the surface with an insulating coating is wired, and an insulating wall is provided between the wire harness and the metal exposed surface of the wiring space, and the wire harness Is insulated from the exposed metal surface through the insulating wall and arranged in the wiring space,
The battery system for vehicles, wherein the wire harness is double-insulated with the insulating coating on the surface and the insulating wall and disposed in the wiring space. A vehicle battery system according to claim 1,
The wire harness has a curved portion;
The battery system for vehicles, wherein the wire harness is biased toward the exposed metal surface by the restoring force of the bending portion. A battery system for a vehicle according to claim 2,
The battery system for vehicles, wherein the curved portion is arranged outside the wiring space. A battery system for a vehicle according to claim 2 or 3,
An end portion of the wire harness is fixed to a predetermined position in the exterior case via a connection tool including a connection terminal or a connector, and the connection tool curves the wire harness and is disposed in the wiring space. A battery system for a vehicle. A battery system for a vehicle according to claim 1, wherein
The outer case includes a plastic battery holder that places the secondary battery in place,
A battery system for a vehicle, wherein the insulating wall is formed integrally with the battery holder. A vehicle battery system according to any one of claims 1 to 5,
The metal exposed surface is a peripheral wall of the exterior case, the insulating wall is located in a position opposite to the peripheral wall and arranged in parallel with the peripheral wall, and a wire is provided between the metal exposed surface of the peripheral wall and the insulating wall. A battery system for vehicles, comprising a harness. A battery system for a vehicle according to any one of claims 1 to 6,
A heating element in the outer case;
The outer case has a metal outer case whose inner surface is a metal exposed surface,
The battery system for vehicles, wherein the heat generating element is thermally coupled to the metal outer case, and heat energy of the heat generating element is thermally conducted to the metal outer case and radiated to the outside. A vehicle battery system according to any one of claims 1 to 7,
A battery system for a vehicle, wherein an air layer is provided between the insulating wall and the exposed metal surface.

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