JP6144128B2

JP6144128B2 - Battery for vehicle

Info

Publication number: JP6144128B2
Application number: JP2013135940A
Authority: JP
Inventors: 植田　義明; 義明植田
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2017-06-07
Anticipated expiration: 2033-06-28
Also published as: JP2015011848A

Description

本発明は、車両に電装用バッテリとして搭載されるバッテリに関し、とくにニッケル水素電池やリチウムイオン二次電池などの補助バッテリを鉛バッテリに接続してなる車両用のバッテリに関する。 The present invention relates to a battery mounted as an electrical equipment battery in a vehicle, and more particularly to a vehicle battery in which an auxiliary battery such as a nickel metal hydride battery or a lithium ion secondary battery is connected to a lead battery.

車両に搭載される鉛バッテリは、車両を走行させる状態で充放電が繰り返されることから寿命が数年と相当に短く、短期間で新しく交換する必要がある。とくに、アイドリングストップの車両に搭載される鉛バッテリは、さらに寿命が短くなる。それは、アイドリングストップする車両は、車両を減速するときに発電機を駆動して回生制動するが、このときの発電電力で鉛バッテリを大電流で充電し、また、信号待ちなどで停止したエンジンをスターターモータで始動するときに大電流で放電するからである。すなわち、アイドリングストップする毎に、鉛バッテリを大電流で充電し、また放電することが鉛バッテリの寿命を著しく短くする。さらに、鉛バッテリは、回生制動するときの発電電力を効率よく充電できない欠点もある。このような弊害を解消するために、鉛バッテリと並列に、リチウムイオン二次電池やニッケル水素電池等の補助バッテリを接続する車両用のバッテリが開発されている。（特許文献１及び２参照） Since the lead battery mounted on the vehicle is repeatedly charged and discharged while the vehicle is running, the life of the lead battery is considerably short as several years, and it is necessary to replace it with a new one in a short period of time. In particular, the life of a lead battery mounted on an idling stop vehicle is further shortened. A vehicle that is idling stopped drives a generator when it decelerates and regeneratively brakes.The lead battery is charged with a large current by the generated power at this time, and the engine stopped due to waiting for a signal, etc. This is because a large current is discharged when starting with the starter motor. That is, each time idling is stopped, charging and discharging the lead battery with a large current significantly shortens the life of the lead battery. Furthermore, the lead battery also has a drawback that it cannot efficiently charge the generated power when regenerative braking is performed. In order to eliminate such adverse effects, a vehicle battery for connecting an auxiliary battery such as a lithium ion secondary battery or a nickel metal hydride battery in parallel with a lead battery has been developed. (See Patent Documents 1 and 2)

特開２００４−１９０６２６号公報JP 2004-190626 A 特開２００９−１６６７６９号公報JP 2009-166769 A

鉛バッテリと並列に、リチウムイオン二次電池やニッケル水素電池等の補助バッテリを接続している車両用のバッテリは、鉛バッテリとは別に補助バッテリを配置して、これを並列に接続することから、車両などの種々の用途において、設置に手間がかかり、また収納スペースも大きくなる欠点がある。 A battery for vehicles connected to an auxiliary battery such as a lithium ion secondary battery or a nickel metal hydride battery in parallel with a lead battery is arranged separately from the lead battery and connected in parallel. In various applications such as vehicles, there are drawbacks in that installation takes time and storage space increases.

本発明は、以上の欠点を解決することを目的に開発されたものである。本発明の第１の目的は、補助バッテリを鉛バッテリと一体構造として、種々の用途において簡単かつ容易にしかも便利に設置でき、しかも全体をコンパクトにできる車両用のバッテリを提供することにある。 The present invention has been developed for the purpose of solving the above drawbacks. SUMMARY OF THE INVENTION A first object of the present invention is to provide a vehicular battery that can be easily and easily installed in various applications, and can be made compact as a whole, with an auxiliary battery integrated with a lead battery.

さらに、鉛バッテリに補助バッテリを接続して、鉛バッテリの欠点を解消する車両用のバッテリは、鉛電池ケースと補助バッテリとを一体構造として、全体をコンパクトにできる。この構造のバッテリは、補助バッテリであるニッケル水素電池やリチウムイオン二次電池などの過充電や過放電を防止し、また大電流による電気特性の低下を少なくするために、保護回路を実現する電子部品を実装する回路基板を必要とする。回路基板は、バッテリの外形を大きくしないように、バッテリケースの上面に配置される。さらに、回路基板は、補助バッテリの電流、すなわち充放電をコントロールするために、ＦＥＴ、トランジスタ、ダイオード、抵抗器、コイル、トランスなど種々の電子部品を実装する。ＦＥＴ、トランジスタ、ダイオード、抵抗器などの電子部品は、流れる電流によってジュール熱で発熱するので、大電流が流れる電子部品は発熱量が大きく、回路基板を局部的に加熱し、また電子部品自体の温度が上昇して、電子部品や回路基板に熱による弊害を与える。電子部品や回路基板の温度上昇は、放熱フィンで放熱して抑制できる。ただ、電子部品や回路基板に放熱フィンを設けると、この回路基板の体積が大きくなって、バッテリ全体の外形が大きくなる。また、放熱フィンにはアルミニウムなどの金属が使用されることから、これ等を絶縁する必要があって、バッテリの設置場所に制約を受ける欠点もある。とくに、車両用のバッテリは、狭くて、金属製のボンネットで上方開口部を塞いでいるエンジンルームに主として設置されることから、バッテリの上に、絶縁する必要のある放熱フィンがある構造では、設置場所の設定が難しく、また、放熱フィンにボンネットなどの金属が接触するとショートする等の弊害が発生する。 Furthermore, the vehicle battery that eliminates the drawbacks of the lead battery by connecting the auxiliary battery to the lead battery can be made compact as a whole by integrating the lead battery case and the auxiliary battery. A battery with this structure is an electronic device that implements a protection circuit to prevent overcharge and overdischarge of auxiliary batteries such as nickel metal hydride batteries and lithium ion secondary batteries, and to reduce deterioration of electrical characteristics due to large currents. A circuit board for mounting components is required. The circuit board is disposed on the upper surface of the battery case so as not to increase the outer shape of the battery. Furthermore, the circuit board is mounted with various electronic components such as FETs, transistors, diodes, resistors, coils, and transformers in order to control the current of the auxiliary battery, that is, charging and discharging. Electronic components such as FETs, transistors, diodes, resistors, etc. generate heat due to Joule heat due to the flowing current, so electronic components that flow large currents generate large amounts of heat, locally heat the circuit board, and the electronic components themselves The temperature rises and the electronic parts and circuit boards are adversely affected by heat. The temperature rise of electronic components and circuit boards can be suppressed by dissipating heat with the radiation fins. However, if the heat dissipating fins are provided on the electronic component or the circuit board, the volume of the circuit board is increased and the outer shape of the entire battery is increased. In addition, since a metal such as aluminum is used for the heat radiating fins, it is necessary to insulate them, and there is a drawback that the installation location of the battery is restricted. In particular, since the battery for vehicles is narrow and is mainly installed in the engine room where the upper opening is closed with a metal bonnet, in the structure where there is a heat radiation fin that needs to be insulated on the battery, Setting the installation location is difficult, and when a metal such as a bonnet comes into contact with the heat dissipating fin, a short circuit or the like occurs.

本発明は、さらに以上の欠点を解消することを目的として開発されたもので、本発明の第２の目的は、発熱部品を実装している回路基板やこれに実装している電子部品等の発熱を効率よく放熱しながら、従来の鉛バッテリに代わって車両のエンジンルームに簡単かつ容易に、しかも理想的な絶縁状態で設置できる車両用のバッテリを提供することにある。 The present invention was developed for the purpose of eliminating the above-described drawbacks. The second object of the present invention is to provide a circuit board on which a heat generating component is mounted, an electronic component mounted on the circuit board, and the like. An object of the present invention is to provide a vehicle battery that can be easily and easily installed in an engine room of a vehicle in an ideal insulated state in place of a conventional lead battery while efficiently dissipating heat.

Means for Solving the Problems and Effects of the Invention

本発明の車両用のバッテリは、互いに並列に接続してなる鉛バッテリ１と補助バッテリ２とを区画して配置してなる鉛電池ケース１０と、この鉛電池ケース１０の上方開口部を閉塞してなる鉛電池蓋１７と、補助バッテリ２に接続され、かつ鉛電池蓋１７の上方に配置され、なおかつ発熱部品２９Ａを実装する回路基板４と、回路基板４を内部に収納してなる下方開口の基板ケース５とを備えており、回路基板４が基板ケース５の下方開口部において鉛電池蓋１７に熱結合状態に配置されている。 The vehicle battery of the present invention closes a lead battery case 10 formed by partitioning a lead battery 1 and an auxiliary battery 2 connected in parallel with each other, and an upper opening of the lead battery case 10. A lead battery lid 17, a circuit board 4 connected to the auxiliary battery 2 and disposed above the lead battery lid 17 and mounting the heat generating component 29 A, and a lower opening containing the circuit board 4 inside The circuit board 4 is disposed in a thermally coupled state to the lead battery lid 17 in the lower opening of the board case 5.

以上の車両用のバッテリは、互いに並列に接続している鉛バッテリと補助バッテリとを鉛電池ケースに配置して、鉛バッテリと補助バッテリとを一体構造とするので、種々の用途において簡単かつ容易にしかも便利に設置でき、しかも全体をコンパクトにできる特徴がある。また、以上の車両用のバッテリは、発熱部品を実装する回路基板やこれに実装している電子部品等の発熱を効率よく放熱しながら、従来の鉛バッテリに代わって車両のエンジンルームに簡単かつ容易に、しかも理想的な絶縁状態で設置できる特徴がある。それは、以上の車両用のバッテリが、鉛電池蓋の上方に配置している回路基板を下方開口の基板ケースの内部に配置すると共に、基板ケースの下方開口部において、回路基板と鉛電池蓋とを熱結合状態に配置しているからである。鉛電池蓋に熱結合状態に配置される回路基板は、発熱部品の発熱を鉛電池蓋に熱伝導して放熱する。鉛電池蓋は、内部に鉛バッテリの電解液を充填しているので、この電解液によって強制的に冷却される。とくに、車両用のバッテリは、車両が走行して振動され、あるいは車両の加速減速で前後方向に加速度を受け、さらに車両が左右に曲がって横方向に加速度を受ける。したがって、鉛電池ケースに充填している電解液は、車両の振動や加速度によって内部で揺れ動いて鉛電池蓋に接触して、鉛電池蓋を介して回路基板を強制的に冷却する。さらに、鉛電池ケースは、鉛電池蓋に連結している区画壁で内部を複数のセル室に区画して、各々のセル室に電解液を充填しているので、鉛電池蓋に連結している区画壁は鉛電池蓋を冷却する放熱フィンの作用をして、鉛電池蓋を効率よく冷却する。さらに、放熱フィンの作用をする区画壁は、電解液に接触しているので、この放熱フィンの区画壁は電解液で強制的に冷却される。したがって、回路基板が鉛電池蓋に熱結合状態に接触する構造は、放熱フィンのある、とくに、放熱フィンを電解液で強制的に液冷している鉛電池蓋に回路基板の発熱を熱伝導して、極めて効率よく冷却されて、発熱部品や回路基板の温度上昇が効果的に防止される。 The vehicle battery described above has a lead battery and an auxiliary battery, which are connected in parallel to each other, arranged in a lead battery case, and the lead battery and the auxiliary battery have an integrated structure, so that it is simple and easy in various applications. Moreover, it can be installed conveniently and has the feature that the whole can be made compact. In addition, the above-mentioned vehicle battery can easily dissipate the heat generated by the circuit board on which the heat-generating component is mounted and the electronic components mounted on the circuit board, and can be used in the vehicle engine room instead of the conventional lead battery. It has the feature that it can be installed easily and in an ideal insulated state. The above-mentioned vehicle battery arranges the circuit board arranged above the lead battery lid inside the board case of the lower opening, and at the lower opening of the board case, the circuit board, the lead battery lid, This is because they are arranged in a thermally coupled state. The circuit board disposed in a thermally coupled state to the lead battery lid dissipates heat by conducting heat generated by the heat generating component to the lead battery lid. Since the lead battery lid is filled with the electrolyte solution of the lead battery, it is forcibly cooled by this electrolyte solution. In particular, the vehicle battery is vibrated when the vehicle travels or receives acceleration in the front-rear direction due to acceleration and deceleration of the vehicle, and further, the vehicle bends left and right and receives acceleration in the lateral direction. Therefore, the electrolyte filled in the lead battery case is swayed internally by the vibration and acceleration of the vehicle and contacts the lead battery lid, forcibly cooling the circuit board via the lead battery lid. Furthermore, the lead battery case is divided into a plurality of cell chambers with partition walls connected to the lead battery lid, and each cell chamber is filled with an electrolyte solution. The partition wall that is used acts as a heat radiating fin for cooling the lead battery lid to cool the lead battery lid efficiently. Furthermore, since the partition wall which acts as a radiating fin is in contact with the electrolytic solution, the partition wall of the radiating fin is forcibly cooled by the electrolytic solution. Therefore, the structure in which the circuit board contacts the lead battery lid in a thermally coupled state has heat dissipation fins. As a result, it is cooled very efficiently, and the temperature rise of the heat generating component and the circuit board is effectively prevented.

鉛バッテリの電解液で回路基板や発熱部品の熱エネルギを放熱する本発明のバッテリは、鉛バッテリの温度が上昇すると効率よく放熱できなくなるが、車両用のバッテリは、温度上昇を少なくするために、外気で冷却される位置に、あるいは室内の温度上昇の少ない場所に設置される。例えば、エンジンルームに設置されるバッテリは、外気を流入させるエンジンルームの前部に配置されて、車両が走行してエンジンルームに強制的に送風される外気で冷却される。すなわち、車両の走行する状態においては、エンジンルームに強制送風される外気が鉛バッテリを冷却する。また、エンジンルーム内に隔壁を設けて区画室にバッテリを配置する構造にあっては、隔壁でバッテリの加熱が抑制されて、鉛バッテリの温度上昇は抑制される。さらに、車両の室内であってシートの下方などに配置されるバッテリは、エンジンの発熱で加熱されず温度上昇を特に小さくできる。 The battery of the present invention that dissipates the heat energy of the circuit board and heat-generating components with the electrolyte of the lead battery cannot be efficiently dissipated when the temperature of the lead battery rises, but the battery for the vehicle is used to reduce the temperature rise. It is installed at a location cooled by the outside air or at a place where the temperature rise in the room is small. For example, a battery installed in an engine room is disposed in the front part of the engine room through which the outside air flows and is cooled by the outside air that is forcibly blown into the engine room as the vehicle travels. That is, in the state where the vehicle travels, the outside air forced into the engine room cools the lead battery. Moreover, in the structure which provides a partition in an engine room and arrange | positions a battery in a compartment, the heating of a battery is suppressed by a partition and the temperature rise of a lead battery is suppressed. Further, the battery disposed in the vehicle interior and below the seat is not heated by the heat generated by the engine, and the temperature rise can be particularly reduced.

本発明の車両用のバッテリは、回路基板４と鉛電池蓋１７のとの間に熱伝導シート５１を挟着して、この熱伝導シート５１を介して回路基板４の発熱を鉛電池蓋１７に熱伝導することができる。
以上の車両用のバッテリは、回路基板と鉛電池蓋とをより理想的な熱結合状態として、回路基板の発熱を効率よく鉛電池蓋に熱伝導して、回路基板やこれに実装している発熱部品の温度上昇をより少なくできる特徴がある。 In the vehicle battery of the present invention, a heat conductive sheet 51 is sandwiched between the circuit board 4 and the lead battery lid 17, and the heat generation of the circuit board 4 is conducted via the heat conductive sheet 51. Can conduct heat.
The vehicle battery described above is mounted on the circuit board and the circuit board by efficiently conducting the heat generated by the circuit board to the lead battery lid, with the circuit board and the lead battery lid being more ideally thermally coupled. There is a feature that the temperature rise of the heat generating component can be reduced.

本発明の車両用のバッテリは、回路基板４を、実装部品を上面に固定してなる片面実装基板として、回路基板４の下面と鉛電池蓋１７との間に熱伝導シート５１を配置することができる。
以上の車両用のバッテリは、回路基板と鉛電池蓋とを広い面積で面接触状態に接触させて熱結合状態に配置できる。このため、回路基板の発熱を効率よく鉛電池蓋に熱伝導して、回路基板や発熱部品の温度上昇を少なくできる。 In the vehicle battery of the present invention, the heat conductive sheet 51 is disposed between the lower surface of the circuit board 4 and the lead battery lid 17 using the circuit board 4 as a single-sided mounting board in which mounting components are fixed to the upper surface. Can do.
The battery for vehicles described above can be placed in a thermal coupling state by bringing the circuit board and the lead battery lid into contact with each other in a surface contact state over a wide area. For this reason, the heat generation of the circuit board can be efficiently conducted to the lead battery lid, and the temperature rise of the circuit board and the heat-generating component can be reduced.

本発明の車両用のバッテリは、回路基板４が、発熱部品２９Ａを固定してなる発熱部品固定部４Ａの下面を熱伝導シート５１を介して鉛電池蓋１７の上面に熱結合状態に配置することができる。
以上の車両用のバッテリは、発熱部品固定部を熱伝導シートを介して鉛電池蓋に熱結合状態とするので、発熱部品の発熱を熱伝導シートを介してより効率よく鉛電池蓋に熱伝導できる。このため、発熱部品の温度上昇を制限して、発熱部品の温度上昇による弊害をより確実に防止できる。 In the vehicle battery according to the present invention, the circuit board 4 has the lower surface of the heat generating component fixing portion 4A formed by fixing the heat generating component 29A disposed in a thermally coupled state on the upper surface of the lead battery lid 17 via the heat conductive sheet 51. be able to.
In the above vehicle battery, the heat generating component fixing part is thermally coupled to the lead battery lid via the heat conductive sheet, so that heat generated from the heat generating component is more efficiently conducted to the lead battery lid via the heat conductive sheet. it can. For this reason, the temperature rise of a heat-emitting component is restrict | limited and the bad effect by the temperature rise of a heat-emitting component can be prevented more reliably.

本発明の車両用のバッテリは、発熱部品２９Ａを回路基板４の下面に突出して固定し、回路基板４の下面に突出してなる発熱部品２９Ａと鉛電池蓋１７との間に熱伝導シート５１を配置することができる。
以上の車両用のバッテリは、回路基板に実装している発熱部品を熱伝導シートを介して直接に鉛電池蓋に熱結合状態とするので、発熱部品の発熱をより効率よく鉛電池蓋に熱伝導して温度上昇を少なくできる。 In the vehicle battery of the present invention, the heat generating component 29 A protrudes and is fixed to the lower surface of the circuit board 4, and the heat conductive sheet 51 is disposed between the heat generating component 29 A protruding on the lower surface of the circuit substrate 4 and the lead battery lid 17. Can be arranged.
In the above-described vehicle battery, the heat generating component mounted on the circuit board is directly coupled to the lead battery lid through the heat conductive sheet, so that the heat generated by the heat generating component is more efficiently heated to the lead battery lid. Conduction can reduce temperature rise.

本発明の車両用のバッテリは、熱伝導シート５１をゲル状シートとすることができる。
以上の車両用のバッテリは、回路基板や鉛電池蓋表面の凹凸をゲル状の熱伝導シートで吸収して、凹凸のある回路基板をも、より理想的な状態で鉛電池蓋に熱結合状態として、回路基板から鉛電池蓋に効率よく熱伝導できる。 In the vehicle battery of the present invention, the heat conductive sheet 51 can be a gel sheet.
The above vehicle battery absorbs the irregularities on the surface of the circuit board and the lead battery lid with the gel-like heat conduction sheet, and the circuit board with the irregularities is also thermally coupled to the lead battery lid in a more ideal state. As a result, heat can be efficiently conducted from the circuit board to the lead battery lid.

本発明の車両用のバッテリは、鉛電池蓋１７が回路基板４に向かって突出する突出部５５を有して、この突出部５５の外側に回路基板４を固定する固定部３８を上面に突出して設け、突出部５５は、回路基板４に熱結合状態に接触する熱結合面５５Ａを上面に有し、固定部３８に回路基板４を固定して、熱結合面５５Ａを回路基板４に熱結合状態に接触させることができる。
以上の車両用のバッテリは、回路基板を鉛電池蓋に確実に固定しながら、回路基板を鉛電池蓋に確実に熱結合状態に配置できる。このため、回路基板を鉛電池蓋に固定する状態で、回路基板の発熱を有効に鉛電池蓋に熱伝導して、回路基板や発熱部品の温度上昇を抑制できる。 The vehicle battery of the present invention has a protruding portion 55 in which the lead battery lid 17 protrudes toward the circuit board 4, and a fixing portion 38 that fixes the circuit board 4 on the outer side of the protruding portion 55 protrudes on the upper surface. The protrusion 55 has a thermal coupling surface 55A that contacts the circuit board 4 in a thermally coupled state on the upper surface, fixes the circuit board 4 to the fixing portion 38, and heats the thermal coupling surface 55A to the circuit board 4. The bonded state can be contacted.
The vehicle battery described above can reliably arrange the circuit board to the lead battery lid in a thermally coupled state while securely fixing the circuit board to the lead battery lid. For this reason, in a state where the circuit board is fixed to the lead battery lid, the heat generation of the circuit board can be effectively conducted to the lead battery lid, and the temperature rise of the circuit board and the heat-generating component can be suppressed.

本発明の車両用のバッテリは、熱結合面５５Ａを、回路基板４の発熱部品２９Ａを固定してなる発熱部品固定部４Ａに熱結合状態に接触させることができる。
以上の車両用のバッテリは、発熱部品固定部を鉛電池蓋に熱結合状態とするので、発熱部品の発熱を効率よく鉛電池蓋の突出部に熱伝導させて、発熱部品の温度上昇を効率よく抑制できる。 In the vehicle battery of the present invention, the heat coupling surface 55A can be brought into contact with the heat generating component fixing portion 4A formed by fixing the heat generating component 29A of the circuit board 4 in a heat coupled state.
In the above vehicle battery, since the heat generating component fixing part is thermally coupled to the lead battery lid, the heat generated by the heat generating component is efficiently conducted to the protruding portion of the lead battery cover, and the temperature rise of the heat generating component is efficiently performed. Can be well controlled.

本発明の車両用のバッテリは、鉛電池蓋１７が、下面に突出する放熱フィン５６を有することができる。
以上の車両用のバッテリは、鉛電池蓋の下面に設けている放熱フィンでもって、回路基板から鉛電池蓋に熱伝導される熱エネルギをより効率よく放熱できる。 In the vehicle battery of the present invention, the lead battery lid 17 can have the radiation fins 56 projecting from the lower surface.
The vehicle battery described above can dissipate more efficiently the heat energy that is thermally conducted from the circuit board to the lead battery lid with the radiation fins provided on the lower surface of the lead battery lid.

本発明の車両用のバッテリは、放熱フィン５６を、回路基板４に熱結合状態にある領域に設けることができる。
以上の車両用のバッテリは、放熱フィンでもって鉛電池蓋を冷却することで、回路基板の熱結合状態にある領域を効果的に冷却できる。 In the vehicle battery of the present invention, the heat radiation fins 56 can be provided in a region in a state of being thermally coupled to the circuit board 4.
The above battery for vehicles can cool the area | region in the thermal coupling state of a circuit board effectively by cooling a lead battery cover with a radiation fin.

本発明の車両用のバッテリは、放熱フィン５６を、回路基板４に実装する発熱部品２９Ａに熱結合してなる熱結合領域に設けることができる。
以上の車両用のバッテリは、放熱フィンでもって、回路基板の発熱部品から熱伝導される熱エネルギをより効率よく冷却して、発熱部品の温度上昇を効果的に抑制できる。 The vehicle battery of the present invention can be provided with the heat dissipating fins 56 in a heat coupling region formed by heat coupling to the heat generating component 29 A mounted on the circuit board 4.
The vehicle battery described above can more efficiently cool the thermal energy conducted from the heat generating component of the circuit board with the heat radiation fins, and effectively suppress the temperature rise of the heat generating component.

本発明の車両用のバッテリは、基板ケース５が、下方開口を鉛電池蓋１７で密閉して内部を閉鎖構造として、この閉鎖構造の内部に回路基板４を配置することができる。
以上の車両用のバッテリは、回路基板を閉鎖構造の内部に配置するので、回路基板をエンジンルームなどの外的環境から保護しながら、鉛電池蓋を介して回路基板と発熱部品の熱エネルギを効率よく放熱できる。 In the vehicle battery according to the present invention, the circuit board 4 can be disposed inside the closed structure, with the substrate case 5 having the lower opening sealed with the lead battery lid 17 and the inside being a closed structure.
In the above vehicle battery, since the circuit board is disposed inside the closed structure, the thermal energy of the circuit board and the heat-generating component is transferred via the lead battery lid while protecting the circuit board from an external environment such as an engine room. Efficient heat dissipation.

本発明の車両用のバッテリは、基板ケース５が下方に突出する外周壁５Ｂを有し、鉛電池蓋１７が外周壁５Ｂの内側に配置してなる内周壁３８を有し、内周壁３８と外周壁５Ｂとの間にパッキン５２を配設して、基板ケース５の内部を閉鎖構造とすることができる。
以上の車両用のバッテリは、回路基板をより安全にエンジンルームなどの外的環境から保護して、回路基板の故障や劣化を有効に防止し、さらに、回路基板を閉鎖構造の基板ケースの内部に配置しながら、回路基板やこれに実装する発熱部品の発熱を効果的に鉛電池蓋に熱伝導して、これ等の温度上昇を抑制できる理想的な特徴を実現できる。 The vehicle battery of the present invention has an outer peripheral wall 5B from which the substrate case 5 protrudes downward, and an inner peripheral wall 38 in which the lead battery lid 17 is disposed inside the outer peripheral wall 5B. A packing 52 is provided between the outer peripheral wall 5B and the inside of the substrate case 5 can be a closed structure.
The above-mentioned battery for vehicles protects the circuit board from the external environment such as the engine room more safely, and effectively prevents the circuit board from being damaged or deteriorated. It is possible to achieve ideal characteristics that can effectively conduct heat generated by the circuit board and the heat-generating component mounted on the circuit board to the lead battery lid while suppressing the temperature rise.

本発明の一実施の形態にかかる車両用のバッテリのブロック図である。It is a block diagram of the battery for vehicles concerning one embodiment of the present invention. 本発明の一実施の形態にかかる車両用のバッテリの斜視図である。It is a perspective view of the battery for vehicles concerning one embodiment of the present invention. 図２に示す車両用のバッテリの一部拡大垂直縦断面図であって、図７のＩＩＩ−ＩＩＩ線断面に相当する図である。FIG. 3 is a partially enlarged vertical vertical sectional view of the vehicle battery shown in FIG. 2, corresponding to a cross section taken along line III-III in FIG. 7. 図２に示す車両用のバッテリの垂直横断面図であって、図７のＩＶ−ＩＶ線断面に相当する図である。FIG. 4 is a vertical cross-sectional view of the vehicle battery shown in FIG. 2, corresponding to a cross section taken along line IV-IV in FIG. 7. 図２に示す車両用のバッテリの一部拡大分解斜視図である。FIG. 3 is a partially enlarged exploded perspective view of the vehicle battery shown in FIG. 2. 図２に示す車両用のバッテリを反対側から見た分解斜視図である。It is the disassembled perspective view which looked at the battery for vehicles shown in FIG. 2 from the opposite side. 図２に示す車両用のバッテリの基板ケースを外した平面図である。It is the top view which removed the board | substrate case of the battery for vehicles shown in FIG. 図５に示す電池組立の分解斜視図である。FIG. 6 is an exploded perspective view of the battery assembly shown in FIG. 5. 本発明の他の実施の形態にかかる車両用のバッテリの要部拡大垂直横断面図である。It is a principal part expansion vertical cross-sectional view of the battery for vehicles concerning other embodiment of this invention. 本発明の他の実施の形態にかかる車両用のバッテリの要部拡大垂直縦断面図である。It is a principal part expansion vertical longitudinal cross-sectional view of the battery for vehicles concerning other embodiment of this invention.

以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための車両用のバッテリを例示するものであって、本発明は車両用のバッテリを以下のものに特定しない。さらに、この明細書は、特許請求の範囲を理解しやすいように、実施例に示される部材に対応する番号を、「特許請求の範囲」および「課題を解決するための手段の欄」に示される部材に付記している。ただ、特許請求の範囲に示される部材を、実施例の部材に特定するものでは決してない。 Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a battery for a vehicle for embodying the technical idea of the present invention, and the present invention does not specify the battery for a vehicle as follows. 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.

図１に示す車両用のバッテリ１００は、鉛バッテリ１に補助バッテリ２を並列に接続している。補助バッテリ２は、鉛バッテリ１と異なる二次電池であって、鉛バッテリ１と並列に接続されて、鉛バッテリ１の充放電特性や寿命等の特性を改善する。補助バッテリ２の二次電池は、金属ケースに電極と電解液を充填しているニッケル水素電池やリチウムイオン二次電池、あるいは電極の両面を密閉構造の外装フィルムで被覆しているリチウムポリマー電池などのラミネート電池である。 A vehicle battery 100 shown in FIG. 1 has a lead battery 1 and an auxiliary battery 2 connected in parallel. The auxiliary battery 2 is a secondary battery different from the lead battery 1 and is connected in parallel with the lead battery 1 to improve characteristics such as charge / discharge characteristics and life of the lead battery 1. The secondary battery of the auxiliary battery 2 is a nickel metal hydride battery or a lithium ion secondary battery in which a metal case is filled with an electrode and an electrolyte, or a lithium polymer battery in which both surfaces of the electrode are covered with a sealed exterior film This is a laminated battery.

車両用のバッテリ１００は、好ましくは、定格電圧を１２Ｖ、又は２４Ｖとする鉛バッテリ１に補助バッテリ２を接続する。定格電圧を１２Ｖとする鉛バッテリ１には、１０個のニッケル水素電池を直列に接続して定格電圧を１２Ｖとする補助バッテリ２を並列に接続する。定格電圧を２４Ｖとする鉛バッテリは、２０個のニッケル水素電池を直列に接続している補助バッテリを並列に接続する。これ等の車両用のバッテリ１００は、鉛バッテリ１と補助バッテリ２の定格電圧を同じ電圧にできる。車両用のバッテリ１００は、鉛バッテリ１と補助バッテリ２の定格電圧を等しくして、ＤＣ／ＤＣコンバータなどの電圧を調整する回路を介することなく並列に接続できる。ただ、本発明のバッテリは、補助バッテリの定格電圧を必ずしも鉛バッテリの定格電圧に等しくする必要はない。定格電圧が鉛バッテリと異なる補助バッテリは、ＤＣ／ＤＣコンバータ（図示せず）を介して鉛バッテリと並列に接続できるからである。 In the vehicle battery 100, the auxiliary battery 2 is preferably connected to a lead battery 1 having a rated voltage of 12V or 24V. A lead battery 1 with a rated voltage of 12V is connected in parallel with an auxiliary battery 2 with 10 nickel hydride batteries connected in series and a rated voltage of 12V. A lead battery having a rated voltage of 24 V is connected in parallel with an auxiliary battery in which 20 nickel metal hydride batteries are connected in series. These vehicle batteries 100 can make the rated voltage of the lead battery 1 and the auxiliary battery 2 the same voltage. The vehicle battery 100 can be connected in parallel without using a circuit that adjusts the voltage of the lead battery 1 and the auxiliary battery 2 so that the rated voltages of the lead battery 1 and the auxiliary battery 2 are equal. However, the battery of the present invention does not necessarily have the rated voltage of the auxiliary battery equal to the rated voltage of the lead battery. This is because an auxiliary battery having a rated voltage different from that of the lead battery can be connected in parallel to the lead battery via a DC / DC converter (not shown).

補助バッテリ２をニッケル水素電池やリチウムイオン二次電池とする車両用のバッテリ１００は、全体の容積と重量に対する充放電容量を鉛バッテリ単体よりも大きくできる。また、補助バッテリ２によって、回生発電電力を鉛バッテリ単体よりも改善して効率よく蓄電して燃費を改善できる。さらにまた、並列に接続しているニッケル水素電池やリチウムイオン二次電池などの補助バッテリ２でもって鉛バッテリ１の劣化を防止して鉛バッテリ１の寿命を長くできる。 The vehicle battery 100 in which the auxiliary battery 2 is a nickel metal hydride battery or a lithium ion secondary battery can have a larger charge / discharge capacity with respect to the overall volume and weight than a lead battery alone. Further, the auxiliary battery 2 can improve the fuel efficiency by improving the regenerative power generation more efficiently than the lead battery alone and storing it efficiently. Furthermore, the deterioration of the lead battery 1 can be prevented by the auxiliary battery 2 such as a nickel hydride battery or a lithium ion secondary battery connected in parallel, and the life of the lead battery 1 can be extended.

本発明の車両用のバッテリは、鉛バッテリに接続される補助バッテリを、ニッケル水素電池やリチウムイオン二次電池に特定するものでなく、現在開発され、あるいはこれから開発される二次電池であって、鉛バッテリに接続して鉛バッテリ単体の電気特性を改善できる全ての二次電池を使用できる。 The battery for vehicles according to the present invention is not a secondary battery connected to a lead battery, but a nickel-hydrogen battery or a lithium ion secondary battery. Any secondary battery that can be connected to a lead battery to improve the electrical characteristics of the lead battery alone can be used.

図１の車両用のバッテリ１００は、鉛バッテリ１と補助バッテリ２をスイッチング素子８を介して並列に接続している。スイッチング素子８は回路基板４（図３及び図４参照）に実装される保護回路９でオンオフに制御される。スイッチング素子８のオン状態で補助バッテリ２は鉛バッテリ１と並列に接続され、スイッチング素子８のオフ状態で補助バッテリ２は鉛バッテリ１に接続されない。保護回路９は、補助バッテリ２の残容量や電流値でスイッチング素子８をオンオフに切り換えて、補助バッテリ２の劣化を防止し、またバッテリ１００のトータルの電気特性を改善する。 A vehicle battery 100 in FIG. 1 has a lead battery 1 and an auxiliary battery 2 connected in parallel via a switching element 8. The switching element 8 is controlled to be turned on and off by a protection circuit 9 mounted on the circuit board 4 (see FIGS. 3 and 4). The auxiliary battery 2 is connected in parallel with the lead battery 1 when the switching element 8 is on, and the auxiliary battery 2 is not connected to the lead battery 1 when the switching element 8 is off. The protection circuit 9 switches the switching element 8 on and off according to the remaining capacity and current value of the auxiliary battery 2 to prevent the deterioration of the auxiliary battery 2 and improve the total electrical characteristics of the battery 100.

たとえば、車両用のバッテリ１００は、スターターモータに電力を供給する状態では保護回路９でスイッチング素子８をオフ状態に切り換える。この状態において、補助バッテリ２はスターターモータに電力を供給せず、鉛バッテリ１がスターターモータに電力を供給する。この車両用のバッテリ１００は、補助バッテリ２の大電流放電による劣化を防止できる。車両の回生制動においては、保護回路９はスイッチング素子８をオン状態として、回生発電電力で補助バッテリ２と鉛バッテリ１の両方を充電する。このバッテリ１００は、回生発電電力で鉛バッテリ１と補助バッテリ２の両方を充電するので、回生発電電力をより効率よく蓄電できる。 For example, the battery 100 for vehicles switches the switching element 8 to the OFF state by the protection circuit 9 in a state where electric power is supplied to the starter motor. In this state, the auxiliary battery 2 does not supply power to the starter motor, and the lead battery 1 supplies power to the starter motor. The vehicle battery 100 can prevent the auxiliary battery 2 from being deteriorated due to a large current discharge. In regenerative braking of the vehicle, the protection circuit 9 turns on the switching element 8 and charges both the auxiliary battery 2 and the lead battery 1 with regenerative power generation. Since the battery 100 charges both the lead battery 1 and the auxiliary battery 2 with regenerative power, the regenerative power can be stored more efficiently.

さらに、保護回路９は、補助バッテリ２の過充電や過放電を防止するために、補助バッテリ２や鉛バッテリ１の電圧を検出し、あるいは補助バッテリ２の残容量を検出して、過充電と過放電を防止するようにスイッチング素子８を制御する。すなわち、バッテリの充電状態で、補助バッテリ２が過充電され、あるいは過充電に近い状態になるとスイッチング素子８をオフに切り換えて過充電を防止し、またバッテリの放電状態で、補助バッテリ２が過放電され、あるいは過放電に近い状態になるとスイッチング素子８をオフに切り換えて過放電を防止する。 Further, the protection circuit 9 detects the voltage of the auxiliary battery 2 or the lead battery 1 or detects the remaining capacity of the auxiliary battery 2 in order to prevent overcharging and overdischarging of the auxiliary battery 2, The switching element 8 is controlled so as to prevent overdischarge. That is, when the auxiliary battery 2 is overcharged or close to being overcharged when the battery is charged, the switching element 8 is switched off to prevent overcharging, and the auxiliary battery 2 is overcharged when the battery is discharged. When discharged or close to overdischarge, the switching element 8 is switched off to prevent overdischarge.

図２ないし図７に示す車両用のバッテリ１００は、鉛電池ケース１０の上方開口部を鉛電池蓋１７で閉塞して閉鎖構造のバッテリケース４０としている。鉛電池ケース１０は、内部を電池区画壁１４で区画して補助バッテリ収納室１６を設けて、この補助バッテリ収納室１６に補助バッテリ２を収納している。補助バッテリ２は、リード線３３を介して、鉛バッテリ１である鉛電池ケース１０の上に配置している回路基板４に接続され、この回路基板４を基板ケース５でカバーして、基板ケース５の内部に配置している。 The battery 100 for a vehicle shown in FIGS. 2 to 7 has a closed battery case 40 in which the upper opening of the lead battery case 10 is closed with a lead battery lid 17. The lead battery case 10 is partitioned by a battery partition wall 14 to provide an auxiliary battery storage chamber 16, and the auxiliary battery 2 is stored in the auxiliary battery storage chamber 16. The auxiliary battery 2 is connected to the circuit board 4 disposed on the lead battery case 10 which is the lead battery 1 via the lead wire 33, and the circuit board 4 is covered with the board case 5. 5 is arranged inside.

図２ないし図７の鉛電池ケース１０は、熱可塑性樹脂を長方形の箱形に成形して、長方形である外周壁１２の内部に、電池区画壁１４を設けて鉛バッテリ室１Ａと補助バッテリ収納室１６とに区画している。鉛バッテリ室１Ａは、複数の区画壁１３を設けて内部を複数のセル室１５に区画している。 The lead battery case 10 shown in FIGS. 2 to 7 is formed by molding a thermoplastic resin into a rectangular box shape, and providing a battery partition wall 14 inside the rectangular outer peripheral wall 12 to accommodate the lead battery chamber 1A and the auxiliary battery. It is partitioned into a chamber 16. The lead battery chamber 1 A is provided with a plurality of partition walls 13 to partition the inside into a plurality of cell chambers 15.

区画壁１３は垂直姿勢で互いに平行に配置されて、鉛電池ケース１０の内部を区画して複数のセル室１５を長方形の長手方向に並べて配置している。各々のセル室１５には、正負の電極板４１が配置され、さらに電解液４２を充電している。鉛バッテリ１の１セルの電圧は２Ｖである。したがって、定格電圧を１２Ｖとする鉛バッテリ１は６セルを直列に接続している。鉛電池ケース１０は、外周壁１２と区画壁１３と底板１１を熱可塑性樹脂で一体的に成形している。外周壁１２は、図５の一部拡大図に示すように、区画壁１３よりも厚く成形される。また、外周壁は、その上端縁を区画壁の上端縁よりも高く成形することができる。この鉛電池ケース１０は、外周壁１２を区画壁１３よりも強固に、しかも確実に鉛電池蓋１７に熱溶着できる。 The partition walls 13 are arranged in parallel with each other in a vertical posture, and the inside of the lead battery case 10 is partitioned to arrange a plurality of cell chambers 15 in the longitudinal direction of the rectangle. In each cell chamber 15, positive and negative electrode plates 41 are arranged, and the electrolytic solution 42 is further charged. The voltage of one cell of the lead battery 1 is 2V. Therefore, the lead battery 1 having a rated voltage of 12 V has 6 cells connected in series. In the lead battery case 10, the outer peripheral wall 12, the partition wall 13, and the bottom plate 11 are integrally formed of a thermoplastic resin. As shown in the partially enlarged view of FIG. 5, the outer peripheral wall 12 is formed thicker than the partition wall 13. Moreover, an outer peripheral wall can shape | mold the upper end edge higher than the upper end edge of a partition wall. In this lead battery case 10, the outer peripheral wall 12 can be thermally welded to the lead battery lid 17 more securely than the partition wall 13.

鉛電池蓋１７は熱可塑性樹脂で成形されて、鉛電池ケース１０の外周壁１２と区画壁１３及び電池区画壁１４の上縁に熱溶着されて、各セル室１５と補助バッテリ収納室１６の上方開口部を閉塞している。図２、図４、及び図５に示すバッテリ１００は、各セル室１５に補充液の蒸留水を充填する点検開口１９を鉛電池蓋１７に設けて、点検開口１９を気密に密閉しない開閉蓋（図示せず）で閉塞している。また、密閉構造の鉛バッテリは、鉛電池蓋でもって、各セル室の上方開口部を密閉構造に、すなわち気密又は水密に密閉している。 The lead battery lid 17 is formed of a thermoplastic resin, and is thermally welded to the outer peripheral wall 12, the partition wall 13, and the battery partition wall 14 of the lead battery case 10. The upper opening is closed. The battery 100 shown in FIGS. 2, 4 and 5 is provided with an inspection opening 19 for filling each cell chamber 15 with distilled water as a replenisher in the lead battery lid 17 so that the inspection opening 19 is not hermetically sealed. (Not shown). Further, the lead battery having a sealed structure has a lead battery lid, and the upper opening of each cell chamber is sealed in a sealed structure, that is, airtight or watertight.

図３ないし図６の鉛電池蓋１７は、外周縁に沿って下方に突出する周壁１８を設けている。周壁１８は、その内側に鉛電池ケース１０の外周壁１２を挿入できるように、内形を外周壁１２の外形にほぼ等しく、正確には外周壁１２を隙間なくスムーズに挿入できるように、外周壁１２の外形よりもわずかに小さく成形している。この鉛電池蓋１７は、周壁１８の内側に外周壁１２を挿入して熱溶着するので、鉛電池蓋１７の周壁１８で鉛電池ケース１０外周壁１２の上縁部を補強して確実に液漏れしないように熱溶着できる。 The lead battery lid 17 of FIGS. 3 to 6 is provided with a peripheral wall 18 protruding downward along the outer peripheral edge. The peripheral wall 18 has an inner shape substantially equal to the outer shape of the outer peripheral wall 12 so that the outer peripheral wall 12 of the lead battery case 10 can be inserted inside, and precisely, the outer peripheral wall 12 can be inserted smoothly without gaps. It is molded slightly smaller than the outer shape of the wall 12. Since the lead battery lid 17 is thermally welded by inserting the outer peripheral wall 12 inside the peripheral wall 18, the peripheral edge 18 of the lead battery lid 17 reinforces the upper edge of the lead battery case 10 outer peripheral wall 12 to ensure the liquid. Can be heat-sealed so as not to leak.

さらに、図３の鉛電池ケース１０は、箱形の外周壁１２の内部に電池区画壁１４を設けて、補助バッテリ２を収納する補助バッテリ収納室１６を設けている。電池区画壁１４は、長方形である外周壁１２の内側で長手方向の一端部に設けられて、電池区画壁１４と外周壁１２との間に補助バッテリ収納室１６を設けている。この鉛電池ケース１０は、長方形のバッテリケース４０の長手方向に、複数のセル室１５と補助バッテリ収納室１６とを並べて配置する。図３の鉛電池ケース１０は、セル室１５と補助バッテリ収納室１６の内幅を同じ幅としている。ただし、補助バッテリ収納室は、必ずしもセル室と同じ内幅とする必要はなく、補助バッテリを収納できる内幅に成形される。 Further, the lead battery case 10 of FIG. 3 is provided with a battery partition wall 14 inside a box-shaped outer peripheral wall 12 and an auxiliary battery storage chamber 16 for storing the auxiliary battery 2. The battery partition wall 14 is provided at one end in the longitudinal direction inside the rectangular outer peripheral wall 12, and an auxiliary battery storage chamber 16 is provided between the battery partition wall 14 and the outer peripheral wall 12. In the lead battery case 10, a plurality of cell chambers 15 and auxiliary battery storage chambers 16 are arranged side by side in the longitudinal direction of the rectangular battery case 40. In the lead battery case 10 of FIG. 3, the inner widths of the cell chamber 15 and the auxiliary battery storage chamber 16 are the same. However, the auxiliary battery storage chamber does not necessarily have the same inner width as the cell chamber, and is formed to have an inner width that can store the auxiliary battery.

鉛電池ケース１０のセル室１５は、鉛バッテリ１の電解液４２である希硫酸を充填して、正負の電極板４１を配置している。電解液４２の希硫酸が補助バッテリ収納室１６に液漏れすると、補助バッテリ２に悪影響を与える。電池区画壁１４は、鉛電池ケース１０と一体的に成形できるので、両側縁は外周壁１２に、底縁は底板１１に液漏れしない状態で連結される。電池区画壁１４の上縁は鉛電池蓋１７と一体的に成形されない。補助バッテリ収納室１６に上方開口部から補助バッテリ２を備える電池組立２０を収納するからである。したがって、電池区画壁１４の上縁は、補助バッテリ２の電池組立２０を収納した後、鉛電池蓋１７を熱溶着して閉塞される。 The cell chamber 15 of the lead battery case 10 is filled with dilute sulfuric acid, which is the electrolytic solution 42 of the lead battery 1, and has positive and negative electrode plates 41. If dilute sulfuric acid in the electrolytic solution 42 leaks into the auxiliary battery storage chamber 16, the auxiliary battery 2 is adversely affected. Since the battery partition wall 14 can be formed integrally with the lead battery case 10, both side edges are connected to the outer peripheral wall 12, and the bottom edge is connected to the bottom plate 11 without liquid leakage. The upper edge of the battery partition wall 14 is not integrally formed with the lead battery lid 17. This is because the battery assembly 20 including the auxiliary battery 2 is stored in the auxiliary battery storage chamber 16 from the upper opening. Therefore, the upper edge of the battery partition wall 14 is closed by storing the battery assembly 20 of the auxiliary battery 2 and then thermally welding the lead battery lid 17.

電池区画壁１４は、図４の一部拡大図に示すように、上縁を区画壁１３の上縁よりも高く突出する形状に成形し、あるいは、図示しないが、鉛電池蓋の内面に熱溶着される上縁の厚さを区画壁の上縁よりも厚く成形して、鉛電池蓋の内面に熱溶着している。 As shown in the partially enlarged view of FIG. 4, the battery partition wall 14 is shaped so that the upper edge protrudes higher than the upper edge of the partition wall 13, or although not shown, heat is applied to the inner surface of the lead battery lid. The thickness of the upper edge to be welded is formed to be thicker than the upper edge of the partition wall, and is thermally welded to the inner surface of the lead battery lid.

図３と図５の鉛電池蓋１７は、鉛電池ケース１０の上方開口部、すなわちセル室１５と補助バッテリ収納室１６の上方開口部を閉塞する。ただ、バッテリは、補助バッテリ収納室に収納する補助バッテリを密閉ケースに入れる構造とし、あるいは補助バッテリ収納室の上方開口部を別の蓋で閉塞することで、鉛電池蓋がセル室のみの上方開口部を閉塞する形状とすることもできる。 3 and 5 closes the upper opening of the lead battery case 10, that is, the upper openings of the cell chamber 15 and the auxiliary battery storage chamber 16. However, the battery has a structure in which the auxiliary battery stored in the auxiliary battery storage chamber is put in a sealed case, or the upper opening of the auxiliary battery storage chamber is closed with another cover so that the lead battery cover is located above the cell chamber only. It can also be made into the shape which obstruct | occludes an opening part.

補助バッテリ収納室１６は、補助バッテリ２が配置されている。補助バッテリ２は、プラスチック製のインナーケース２１を介して補助バッテリ収納室１６の定位置に配置される。このバッテリ１００は、補助バッテリ２のニッケル水素電池などをインナーケース２１の定位置に配置して電池組立２０とし、この電池組立２０を補助バッテリ収納室１６に配置して、補助バッテリ２を補助バッテリ収納室１６に配置する。インナーケース２１は、プラスチック製で、電池組立２０を補助バッテリ収納室１６に収納する状態で、補助バッテリ収納室１６の定位置に配置されて、補助バッテリ２を補助バッテリ収納室１６の定位置に配置する。 The auxiliary battery 2 is disposed in the auxiliary battery storage chamber 16. The auxiliary battery 2 is disposed at a fixed position in the auxiliary battery storage chamber 16 via a plastic inner case 21. In this battery 100, a nickel metal hydride battery or the like of the auxiliary battery 2 is arranged at a fixed position of the inner case 21 to form a battery assembly 20, and the battery assembly 20 is arranged in the auxiliary battery storage chamber 16 so that the auxiliary battery 2 is used as the auxiliary battery. Arranged in the storage chamber 16. The inner case 21 is made of plastic and is disposed at a fixed position of the auxiliary battery storage chamber 16 in a state where the battery assembly 20 is stored in the auxiliary battery storage chamber 16, and the auxiliary battery 2 is positioned at a fixed position of the auxiliary battery storage chamber 16. Deploy.

図８の分解斜視図に示す電池組立２０のインナーケース２１は、一対の対向プレート２２を連結して、対向プレート２２の間に補助バッテリ２を配置している。一対の対向プレート２２は、プレート部２２Ａの周囲に周壁２２Ｂを設けて、周壁２２Ｂを熱溶着、ネジ止め、接着などの方法で互いに連結して、内部に補助バッテリ２を配置している。プレート部２２Ａは、円筒形電池２Ａを定位置に配置する山形の凸条２２Ｃを一体的に成形して設けている。この対向プレート２２は、凸条２２Ｃを円筒形電池２Ａの間に配置して、補助バッテリ２の円筒形電池２Ａを定位置に配置する。円筒形電池２Ａは２個を直列に接続して電池モジュールとし、この電池モジュールを水平姿勢で上下に多段に配置している。電池組立２０は、電池モジュールを直列に接続する個数で定格電圧を調整できる。補助バッテリ２をニッケル水素電池とする電池組立２０は、２個の円筒形電池２Ａを直列に接続する電池モジュールを５段に配置し、電池モジュールを直列に接続して定格電圧を１２Ｖにできる。 In the inner case 21 of the battery assembly 20 shown in the exploded perspective view of FIG. 8, a pair of opposed plates 22 are connected, and the auxiliary battery 2 is disposed between the opposed plates 22. The pair of opposing plates 22 are provided with a peripheral wall 22B around the plate portion 22A, and the peripheral walls 22B are connected to each other by a method such as heat welding, screwing, or bonding, and the auxiliary battery 2 is disposed inside. The plate portion 22A is integrally formed with a mountain-shaped ridge 22C for arranging the cylindrical battery 2A at a fixed position. The counter plate 22 has the ridge 22C disposed between the cylindrical batteries 2A, and the cylindrical battery 2A of the auxiliary battery 2 is disposed at a fixed position. Two cylindrical batteries 2A are connected in series to form a battery module, and the battery modules are arranged in multiple stages vertically in a horizontal posture. The battery assembly 20 can adjust the rated voltage by the number of battery modules connected in series. In the battery assembly 20 in which the auxiliary battery 2 is a nickel metal hydride battery, battery modules that connect two cylindrical batteries 2A in series are arranged in five stages, and the battery modules are connected in series to achieve a rated voltage of 12V.

図の電池組立２０は、補助バッテリ２をニッケル水素電池とするので、１０個の電池を直列に接続して、定格電圧を１２Ｖとする。ただし、本発明の車両用のバッテリは、補助バッテリをニッケル水素電池には特定しない。補助バッテリをリチウムイオン二次電池とする電池組立は、３個又は４個の電池を直列に接続して、定格電圧を１１Ｖ〜１５Ｖとして、定格電圧を１２Ｖとする鉛バッテリ１に接続することができる。 In the illustrated battery assembly 20, the auxiliary battery 2 is a nickel metal hydride battery, so that 10 batteries are connected in series and the rated voltage is set to 12V. However, the battery for vehicles of the present invention does not specify the auxiliary battery as a nickel metal hydride battery. The battery assembly in which the auxiliary battery is a lithium ion secondary battery may be connected to a lead battery 1 having three or four batteries connected in series, a rated voltage of 11V to 15V, and a rated voltage of 12V. it can.

さらに、図６と図７のバッテリ１００は、補助バッテリ２を鉛バッテリ１に並列に接続するために、補助バッテリ２の出力側をバスバー３２、３４を介して鉛バッテリ１の出力端子３に接続している。図６のバッテリ１００は、鉛電池蓋１７の上面に垂直姿勢に突出する鉛バッテリ１の正負の出力端子３を設けている。図６のバッテリ１００は、鉛バッテリ１のマイナス側の出力端子３を、バスバー３４を介して補助バッテリ２のマイナス側出力である接続端子３１に接続して、鉛バッテリ１のプラス側の出力端子３を、接続リード３７と回路基板４とバスバー３２を介してサブバッテリのプラス側出力である接続端子３１に接続している。 6 and 7 connect the output side of the auxiliary battery 2 to the output terminal 3 of the lead battery 1 via the bus bars 32 and 34 in order to connect the auxiliary battery 2 to the lead battery 1 in parallel. doing. The battery 100 of FIG. 6 is provided with the positive and negative output terminals 3 of the lead battery 1 projecting in a vertical posture on the upper surface of the lead battery lid 17. The battery 100 of FIG. 6 connects the negative output terminal 3 of the lead battery 1 to the connection terminal 31 that is the negative output of the auxiliary battery 2 via the bus bar 34, and the positive output terminal of the lead battery 1. 3 is connected to a connection terminal 31 which is a positive output of the sub-battery via the connection lead 37, the circuit board 4 and the bus bar 32.

回路基板４は、補助バッテリ２の保護回路９（図１参照）を実現する電子部品２９を実装する。回路基板４に実装される保護回路９は、補助バッテリ２を構成する各々の二次電池の電圧を検出し、さらに補助バッテリ２の電流を検出して、補助バッテリ２の過充電や過放電を防止し、さらに、過大電流を防止して、補助バッテリ２の電気特性の低下を防止する。補助バッテリ２の電圧を検出する保護回路９は、補助バッテリ２を構成する各々の二次電池の電圧を検出し、あるいは複数の二次電池を直列に接続している電池モジュールの電圧を検出する。この保護回路９を実装する回路基板４は、補助バッテリ２を構成する二次電池の電極端子や電池モジュールの電極端子にリード線３３を介して接続されて、二次電池や電池モジュールの電圧を検出する。さらに、補助バッテリ２の電流を検出する保護回路９は、補助バッテリ２と直列に接続する電流検出抵抗２８（図８参照）の両端の電圧を検出する。この保護回路９を実装する回路基板４は、電流検出抵抗２８の両端に接続しているリード線３３を補助バッテリ２に接続している。 The circuit board 4 mounts an electronic component 29 that realizes the protection circuit 9 (see FIG. 1) of the auxiliary battery 2. The protection circuit 9 mounted on the circuit board 4 detects the voltage of each secondary battery constituting the auxiliary battery 2 and further detects the current of the auxiliary battery 2 to prevent overcharging and overdischarging of the auxiliary battery 2. In addition, an excessive current is prevented, and deterioration of the electrical characteristics of the auxiliary battery 2 is prevented. The protection circuit 9 for detecting the voltage of the auxiliary battery 2 detects the voltage of each secondary battery constituting the auxiliary battery 2 or detects the voltage of a battery module in which a plurality of secondary batteries are connected in series. . The circuit board 4 on which the protection circuit 9 is mounted is connected to the electrode terminals of the secondary battery and the battery module constituting the auxiliary battery 2 via the lead wires 33 so that the voltage of the secondary battery or the battery module is supplied. To detect. Further, the protection circuit 9 that detects the current of the auxiliary battery 2 detects the voltage across the current detection resistor 28 (see FIG. 8) connected in series with the auxiliary battery 2. The circuit board 4 on which the protection circuit 9 is mounted has the lead wires 33 connected to both ends of the current detection resistor 28 connected to the auxiliary battery 2.

補助バッテリ２の保護回路９を実装する回路基板４は、電流検出抵抗や半導体スイッチング素子８（図１参照）などの発熱部品２９Ａを実装している。発熱部品２９Ａの半導体スイッチング素子８は、たとえば補助バッテリ２と直列に接続されるＦＥＴ、トランジスタ、ＩＧＢＴなどのスイッチング素子で、オンオフに制御されて補助バッテリ２の過充電や過放電を防止する。また、補助バッテリをＤＣ／ＤＣコンバータを介して鉛バッテリに接続している車両用のバッテリは、ＤＣ／ＤＣコンバータを構成するトランジスタ、ＦＥＴ、ダイオード、トランスなどの発熱部品を回路基板に実装している。 A circuit board 4 on which the protection circuit 9 of the auxiliary battery 2 is mounted is mounted with a heat generating component 29A such as a current detection resistor and a semiconductor switching element 8 (see FIG. 1). The semiconductor switching element 8 of the heat generating component 29A is, for example, a switching element such as an FET, a transistor, or an IGBT connected in series with the auxiliary battery 2, and is controlled to be turned on / off to prevent overcharging and overdischarging of the auxiliary battery 2. In addition, a vehicle battery in which an auxiliary battery is connected to a lead battery via a DC / DC converter has a circuit board mounted with heat-generating components such as transistors, FETs, diodes, and transformers that constitute the DC / DC converter. Yes.

発熱部品２９Ａを実装する回路基板４は、鉛電池蓋１７の上に固定される。回路基板４は、図３、図４、及び図６に示すように、鉛電池蓋１７の上面に突出するように設けている固定部３８に、回路基板４を貫通する止ネジ５３を介して固定される。図に示す固定部３８は、止ネジ５３をねじ込みできる固定ボスとしている。回路基板４を絶縁状態で配置するために、鉛電池蓋１７に基板ケース５を固定している。基板ケース５は、回路基板４を内部に収納する下方開口の箱形で、下方開口部を鉛電池蓋１７で密閉して内部を閉鎖構造とし、閉鎖構造の内部に回路基板４を配置している。回路基板４を基板ケース５に収納している車両用のバッテリ１００は、車両のエンジンルームなどに設置されて、回路基板４をエンジンルーム内の厳しい温度などの外的環境から保護できる。 The circuit board 4 on which the heat generating component 29 A is mounted is fixed on the lead battery lid 17. As shown in FIGS. 3, 4, and 6, the circuit board 4 is attached to a fixing portion 38 provided so as to protrude from the upper surface of the lead battery lid 17 through a set screw 53 that penetrates the circuit board 4. Fixed. The fixing portion 38 shown in the figure is a fixing boss into which a set screw 53 can be screwed. In order to arrange the circuit board 4 in an insulated state, the board case 5 is fixed to the lead battery lid 17. The substrate case 5 has a box shape with a lower opening for accommodating the circuit board 4 therein, the lower opening is sealed with a lead battery lid 17 to form a closed structure, and the circuit board 4 is disposed inside the closed structure. Yes. A battery 100 for a vehicle in which the circuit board 4 is housed in the board case 5 is installed in an engine room or the like of the vehicle, and can protect the circuit board 4 from an external environment such as severe temperature in the engine room.

基板ケース５は、絶縁材のプラスチックを下方開口の箱形に成形している。この基板ケース５は、下方に突出する外周壁５Ｂを一体的に成形して設けている。この基板ケース５の下方開口を鉛電池蓋１７で閉塞するために、鉛電池蓋１７は基板ケース５の外周壁１２の内側に配置される内周壁３９をプラスチックで一体的に成形して設けている。この基板ケース５は、外周壁５Ｂの内側に内周壁３９を挿入し、さらに内周壁３９と外周壁５Ｂとの間にＯリングなどのパッキン５２を配置して、基板ケース５の内部を閉鎖構造としている。 The substrate case 5 is formed by molding a plastic as an insulating material into a box shape having a downward opening. The substrate case 5 is integrally formed with an outer peripheral wall 5B that protrudes downward. In order to close the lower opening of the substrate case 5 with the lead battery lid 17, the lead battery lid 17 is provided by integrally molding an inner peripheral wall 39 disposed inside the outer peripheral wall 12 of the substrate case 5 with plastic. Yes. In this substrate case 5, an inner peripheral wall 39 is inserted inside the outer peripheral wall 5B, and a packing 52 such as an O-ring is disposed between the inner peripheral wall 39 and the outer peripheral wall 5B, so that the inside of the substrate case 5 is closed. It is said.

基板ケース５の内部に配置される回路基板４は、基板ケース５の下方開口部において、鉛電池蓋１７に熱結合状態に配置されて、回路基板４や回路基板４に実装している発熱部品２９Ａの発熱を鉛電池蓋１７に熱伝導する。図３と図４のバッテリ１００は、回路基板４と鉛電池蓋１７のとの間に熱伝導シート５１を挟着して、熱伝導シート５１を介して回路基板４の発熱を鉛電池蓋１７に熱伝導する。熱伝導シート５１は、ゲル状シートである。この熱伝導シート５１は、凹凸のある回路基板４や鉛電池蓋１７の表面に隙間なく密着して、効率よく熱伝導する特徴がある。ただ、熱伝導シートは、必ずしもゲル状シートとする必要はなく、ゴム状弾性のある熱伝導シート、あるいは表面にシリコンオイル等を塗布している優れた熱伝導特性のシートが使用できる。 The circuit board 4 arranged inside the board case 5 is arranged in a thermally coupled state to the lead battery lid 17 in the lower opening of the board case 5 and is mounted on the circuit board 4 or the circuit board 4. The heat generated by 29A is conducted to the lead battery lid 17. 3 and 4, the heat conductive sheet 51 is sandwiched between the circuit board 4 and the lead battery lid 17, and the heat generated by the circuit board 4 is transferred via the heat conductive sheet 51. To conduct heat. The heat conductive sheet 51 is a gel-like sheet. The heat conductive sheet 51 is characterized in that it is in close contact with the surface of the uneven circuit board 4 and the lead battery lid 17 without any gap and efficiently conducts heat. However, the heat conductive sheet does not necessarily need to be a gel-like sheet, and a heat conductive sheet having rubbery elasticity or a sheet having excellent heat conductive characteristics in which silicon oil or the like is applied to the surface can be used.

図３と図４の断面図に示す回路基板４は、実装部品を上面に固定してなる片面実装基板で、回路基板４の下面と鉛電池蓋１７との間に熱伝導シート５１を配置している。この構造は、回路基板４を鉛電池蓋１７に接近して配置できるので、薄くて熱伝導特性の優れた熱伝導シート５１で回路基板４の発熱を効率よく鉛電池蓋１７に熱伝導できる。 The circuit board 4 shown in the cross-sectional views of FIGS. 3 and 4 is a single-sided mounting board in which mounting components are fixed to the upper surface. A heat conductive sheet 51 is disposed between the lower surface of the circuit board 4 and the lead battery lid 17. ing. In this structure, the circuit board 4 can be disposed close to the lead battery lid 17, so that heat generation of the circuit board 4 can be efficiently conducted to the lead battery lid 17 by the thin heat conduction sheet 51 having excellent heat conduction characteristics.

さらに、図３と図４の断面図に示す回路基板４は、発熱部品２９Ａを固定している発熱部品固定部４Ａの下面を熱伝導シート５１を介して鉛電池蓋１７の上面に熱結合状態に配置している。この構造は、発熱部品２９Ａの発熱を、熱伝導シート５１を介して鉛電池蓋１７に効率よく熱伝導して、発熱部品２９Ａの温度上昇を抑制できる。 Further, in the circuit board 4 shown in the cross-sectional views of FIGS. 3 and 4, the lower surface of the heat generating component fixing portion 4 A fixing the heat generating component 29 A is thermally coupled to the upper surface of the lead battery lid 17 via the heat conductive sheet 51. Is arranged. With this structure, the heat generation of the heat generating component 29A can be efficiently conducted to the lead battery lid 17 via the heat conductive sheet 51, and the temperature rise of the heat generating component 29A can be suppressed.

また、図９の断面図に示す構造は、発熱部品２９Ａを回路基板４の下面に突出するように固定して、回路基板４の下面に突出する発熱部品２９Ａと鉛電池蓋１７との間に熱伝導シート５１を配置している。この構造は、回路基板４に実装する発熱部品２９Ａの発熱を熱伝導シート５１を介して直接に鉛電池蓋１７に熱伝導してより効率よく放熱する。 The structure shown in the cross-sectional view of FIG. 9 is such that the heat generating component 29A is fixed so as to protrude on the lower surface of the circuit board 4, and between the heat generating component 29A protruding on the lower surface of the circuit board 4 and the lead battery lid 17. A heat conductive sheet 51 is disposed. In this structure, the heat generated by the heat generating component 29A mounted on the circuit board 4 is directly conducted to the lead battery lid 17 through the heat conductive sheet 51, and is radiated more efficiently.

さらに、図１０の断面図に示す鉛電池蓋１７は、回路基板４に向かって突出する突出部５５を成形して設けて、突出部５５の外側に回路基板４を固定する固定部３８を上面に突出して設けている。突出部５５は、広い面積で回路基板４に熱結合できるように、回路基板４に熱結合状態に接触する熱結合面５５Ａを上面に設けている。この車両用のバッテリは、固定部３８に回路基板４を貫通する止ネジ５３をねじ込んで、回路基板４を鉛電池蓋１７に固定し、この状態で、回路基板４と熱結合面５５Ａとの間に熱伝導シート５１を押圧状態で挟み、回路基板４を熱伝導シート５１を介して熱結合面５５Ａに押し付けて回路基板４と鉛電池蓋１７とを常に理想的な状態で熱結合状態にできる。このため、この回路基板４を鉛電池蓋１７に確実に固定しながら、回路基板４を鉛電池蓋１７に確実に熱結合状態に配置できる。また、図１０に示す鉛電池蓋１７は、熱結合面５５Ａを回路基板４の発熱部品固定部４Ａに熱結合状態に接触するので、発熱部品２９Ａの発熱を効率よく鉛電池蓋１７の突出部５５に熱伝導して、発熱部品２９Ａの温度上昇を効率よく抑制できる。 Furthermore, the lead battery lid 17 shown in the cross-sectional view of FIG. 10 is formed with a protruding portion 55 protruding toward the circuit board 4, and the fixing portion 38 that fixes the circuit board 4 outside the protruding portion 55 is provided on the upper surface. It protrudes to. The protrusion 55 is provided with a thermal coupling surface 55 A that contacts the circuit board 4 in a thermally coupled state on the upper surface thereof so that it can be thermally coupled to the circuit board 4 with a large area. In this vehicle battery, a set screw 53 penetrating the circuit board 4 is screwed into the fixing portion 38 to fix the circuit board 4 to the lead battery lid 17. In this state, the circuit board 4 and the heat coupling surface 55 A are connected to each other. The circuit board 4 is pressed against the heat coupling surface 55A via the heat conductive sheet 51, and the circuit board 4 and the lead battery lid 17 are always in a heat coupled state in an ideal state. it can. For this reason, the circuit board 4 can be reliably placed in the lead battery lid 17 in a thermally coupled state while the circuit board 4 is securely fixed to the lead battery lid 17. Further, the lead battery lid 17 shown in FIG. 10 contacts the heat coupling surface 55A with the heat generating component fixing portion 4A of the circuit board 4 in a heat coupled state, so that the heat generated by the heat generating component 29A can be efficiently generated. Conducting heat to 55, the temperature rise of the heat generating component 29A can be efficiently suppressed.

さらに、図１０の断面図に示す鉛電池蓋１７は、下面に突出するように放熱フィン５６を設けている。放熱フィン５６は、プラスチック製の鉛電池蓋１７に一体的に成形して設けられる。この鉛電池蓋１７は、下面に設けている放熱フィン５６をセル室１５に配置し、この放熱フィン５６を電解液４２に接触させて電解液４２で強制冷却するので、回路基板４の発熱を鉛電池蓋１７から効率よく放熱できる。とくに、図１０の鉛電池蓋１７は、放熱フィン５６を、回路基板４に熱結合状態にある領域に設けているので、放熱フィン５６でもって鉛電池蓋１７を冷却して、回路基板４の熱結合状態にある領域をより効果的に冷却できる。 Furthermore, the lead battery lid 17 shown in the sectional view of FIG. 10 is provided with heat radiation fins 56 so as to protrude from the lower surface. The heat radiating fins 56 are integrally formed on the plastic lead battery lid 17. In this lead battery lid 17, the heat radiation fins 56 provided on the lower surface are disposed in the cell chamber 15, and the heat radiation fins 56 are brought into contact with the electrolytic solution 42 and forcibly cooled by the electrolytic solution 42. Heat can be efficiently radiated from the lead battery lid 17. In particular, the lead battery lid 17 of FIG. 10 is provided with the radiation fins 56 in the region that is thermally coupled to the circuit board 4, so that the lead battery lid 17 is cooled by the radiation fins 56 and the circuit board 4 The region in the heat coupled state can be cooled more effectively.

さらに、図１０の鉛電池蓋１７は、放熱フィン５６を、回路基板４に実装する発熱部品２９Ａに熱結合している熱結合領域に設けているので、放熱フィン５６を電解液４２で強制冷却して、回路基板４の発熱部品２９Ａから熱伝導される熱エネルギをより効率よく冷却して、発熱部品２９Ａの温度上昇を効果的に抑制できる。 Furthermore, since the lead battery lid 17 of FIG. 10 has the heat radiating fins 56 provided in the heat coupling region that is thermally coupled to the heat generating component 29A mounted on the circuit board 4, the heat radiating fins 56 are forcibly cooled by the electrolytic solution 42. Thus, the heat energy conducted from the heat generating component 29A of the circuit board 4 can be cooled more efficiently, and the temperature rise of the heat generating component 29A can be effectively suppressed.

１００…バッテリ
１…鉛バッテリ
１Ａ…鉛バッテリ室
２…補助バッテリ
２Ａ…円筒形電池
３…出力端子
４…回路基板
４Ａ…発熱部品固定部
５…基板ケース
５Ｂ…外周壁
８…スイッチング素子
９…保護回路
１０…鉛電池ケース
１１…底板
１２…外周壁
１３…区画壁
１４…電池区画壁
１５…セル室
１６…補助バッテリ収納室
１７…鉛電池蓋
１８…周壁
１９…点検開口
２０…電池組立
２１…インナーケース
２２…対向プレート
２２Ａ…プレート部
２２Ｂ…周壁
２２Ｃ…凸条
２８…電流検出抵抗
２９…電子部品
２９Ａ…発熱部品
３１…接続端子
３２…バスバー
３３…リード線
３４…バスバー
３７…接続リード
３８…固定部
３９…内周壁
４０…バッテリケース
４１…電極板
４２…電解液
５１…熱伝導シート
５２…パッキン
５３…止ネジ
５５…突出部
５５Ａ…熱結合面
５６…放熱フィン DESCRIPTION OF SYMBOLS 100 ... Battery 1 ... Lead battery 1A ... Lead battery chamber 2 ... Auxiliary battery 2A ... Cylindrical battery 3 ... Output terminal 4 ... Circuit board 4A ... Heating component fixing | fixed part 5 ... Board case 5B ... Outer peripheral wall 8 ... Switching element 9 ... Protection Circuit 10 ... Lead battery case 11 ... Bottom plate 12 ... Outer peripheral wall 13 ... Partition wall 14 ... Battery partition wall 15 ... Cell chamber 16 ... Auxiliary battery storage chamber 17 ... Lead battery lid 18 ... Perimeter wall 19 ... Inspection opening 20 ... Battery assembly 21 ... Inner case 22 ... opposing plate 22A ... plate portion 22B ... peripheral wall 22C ... ridge 28 ... current detection resistor 29 ... electronic component 29A ... heating component 31 ... connection terminal 32 ... bus bar 33 ... lead wire 34 ... bus bar 37 ... connection lead 38 ... Fixed part 39 ... Inner peripheral wall 40 ... Battery case 41 ... Electrode plate 42 ... Electrolytic solution 51 ... Thermal conductive sheet 52 ... Packing 5 ... screws 55 ... projecting portion 55A ... thermal coupling surface 56 ... radiator fins

Claims

A lead battery case formed by dividing and arranging a lead battery and an auxiliary battery connected in parallel with each other;
A lead battery lid formed by closing the upper opening of the lead battery case;
A circuit board connected to the auxiliary battery and disposed above the lead battery lid, and mounting a heat generating component;
A board case having a lower opening formed by housing the circuit board therein;
A battery for vehicles, wherein the circuit board is disposed in a thermally coupled state to the lead battery lid at a lower opening of the board case.

A heat conduction sheet is sandwiched between the circuit board and the lead battery lid, and heat generated from the circuit board is conducted to the lead battery lid through the heat conduction sheet. 1. A vehicle battery according to 1.

The vehicle circuit board according to claim 2, wherein the circuit board is a single-sided mounting board in which mounting components are fixed to the upper surface, and a heat conductive sheet is disposed between the lower surface of the circuit board and the lead battery lid. Battery.

4. The vehicle according to claim 2, wherein the circuit board is configured such that a lower surface of a heat generating component fixing portion formed by fixing a heat generating component is disposed in a thermally coupled state on an upper surface of the lead battery lid via a heat conductive sheet. Battery for.

The heat generating component is arranged to protrude from a lower surface of the circuit board and fixed, and the heat conductive sheet is disposed between the heat generating component protruding from the lower surface of the circuit board and the lead battery lid. Battery for vehicles to be used.

6. The vehicle battery according to claim 2, wherein the heat conductive sheet is a gel sheet.

The lead battery lid has a protrusion protruding toward the circuit board;
A fixing portion for fixing the circuit board is provided on the outer surface of the protruding portion so as to protrude from the upper surface.
The protrusion has a heat coupling surface on the upper surface that contacts the circuit board in a thermally coupled state,
The circuit board is fixed to the fixing part,
The vehicle battery according to any one of claims 1 to 6, wherein the thermal coupling surface is in contact with the circuit board in a thermal coupling state.

The vehicle battery according to claim 7, wherein the heat coupling surface is in contact with a heat generating component fixing portion formed by fixing a heat generating component of the circuit board in a heat coupled state.

The battery for vehicles described in any one of Claim 1 thru | or 7 in which the said lead battery cover has a radiation fin which protrudes in a lower surface.

The vehicle battery according to claim 9, wherein the heat dissipating fins are provided in a region in a state of being thermally coupled to the circuit board.

The vehicle battery according to claim 9, wherein the heat dissipating fin is provided in a heat coupling region formed by heat coupling to a heat generating component mounted on the circuit board.

The vehicle case according to any one of claims 1 to 11, wherein the board case has a closed structure in which a lower opening is sealed with the lead battery lid, and a circuit board is disposed inside the closed structure. Battery.

The substrate case has an outer peripheral wall projecting downward, the lead battery lid has an inner peripheral wall formed on the inner side of the outer peripheral wall, and a packing is disposed between the inner peripheral wall and the outer peripheral wall. The battery for a vehicle according to claim 12, wherein the inside of the substrate case has a closed structure.