JP2017073352A - Battery holding structure - Google Patents

Battery holding structure Download PDF

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JP2017073352A
JP2017073352A JP2015201187A JP2015201187A JP2017073352A JP 2017073352 A JP2017073352 A JP 2017073352A JP 2015201187 A JP2015201187 A JP 2015201187A JP 2015201187 A JP2015201187 A JP 2015201187A JP 2017073352 A JP2017073352 A JP 2017073352A
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case
battery
lower wall
vehicle body
body side
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幸司 安藤
Koji Ando
幸司 安藤
正浩 今井
Masahiro Imai
正浩 今井
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Kojima Industries Corp
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Kojima Press Industry Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide a battery holding structure capable of suppressing infiltration of dust, dirt and water into a case for housing a battery.SOLUTION: A case 30 hermetically seals a battery 10. Therefore, it is possible to suppress intrusion of dust, dirt and water into a case 30 as compared with the prior art. The plate thickness of a lower wall 31a of a lower case 31 is set to be smaller than that of a side wall 31b of the lower case 31, so that the heat of a battery 20 can be transmitted to a vehicle body side member 50. Therefore, by reducing the thickness, the thermal resistance can be lowered, and heat can be effectively transferred to the vehicle body side member 50. Accordingly, even when the battery 20 is hermetically sealed in the case 30, the battery 20 can be efficiently cooled.SELECTED DRAWING: Figure 2

Description

本発明は、電池と該電池を収容するケースとを有する電池保持構造に関する。   The present invention relates to a battery holding structure having a battery and a case for housing the battery.

特開２００６−２４４４５号公報は、図３に示すように、複数の電池２の積層体を板金ケース３内に搭載してパック化し、板金ケース３の外部からケース３内に取り入れた空気Ａを、隣り合う電池２，２間に流して電池２を冷却（熱交換）した後にケース３の外に排出する技術を開示している。   As shown in FIG. 3, JP 2006-24445 A discloses a stack of a plurality of batteries 2 mounted in a sheet metal case 3 to form a pack, and air A taken into the case 3 from the outside of the sheet metal case 3. A technique is disclosed in which the battery 2 is cooled (heat exchanged) between the adjacent batteries 2 and 2 and then discharged out of the case 3.

しかし従来技術には、つぎの問題点がある。
（ａ）ケース３内に取り入れる空気とともに埃、ゴミ等がケース３内に混入し、ケース３内の冷却風流路に堆積して電池２の冷却性能を低下させるおそれがある。
（ｂ）ケース３内に空気を取り入れる取り入れ口が存在するため、そこから、また板金の継ぎ目から水がケース３内に入るおそれがある。パッキンや水濡れ対策カバーなどの別部品を設けることも考えられるが高コストになる。 However, the prior art has the following problems.
(A) There is a possibility that dust, dust and the like are mixed in the case 3 together with the air taken into the case 3 and accumulate in the cooling air flow path in the case 3 to deteriorate the cooling performance of the battery 2.
(B) Since there is an intake port for taking air into the case 3, water may enter the case 3 from there or from the joint of the sheet metal. It may be possible to provide other parts such as a packing and a cover to prevent water wetting, but this is expensive.

特開２００６−２４４４５号公報JP 2006-24445 A

本発明の目的は、電池を収容するケース内に埃、ゴミおよび水が入り込むことを抑制できる、電池保持構造に関する。   The objective of this invention is related with the battery holding structure which can suppress that dust, refuse, and water enter into the case which accommodates a battery.

上記目的を達成する本発明はつぎの通りである。
（１） 電池と、該電池を覆う樹脂製ケースと、を有し、
前記電池は、前記ケース内に該ケースの少なくとも下壁に接触させて収容されており、
前記ケースは、前記下壁と該下壁から立ち上がる側壁を備えるロアケースと、該ロアケースに固定されるアッパケースと、を備えており、前記電池を密閉しており、
前記ロアケースは、前記ケースの外部に配置される車体側部材に前記下壁を接触させた状態で、該車体側部材に取付けられており、
前記ロアケースの下壁の板厚は、前記ロアケースの側壁に比べて薄く設定されており、前記電池の熱を前記車体側部材に伝達可能な厚さとされている、電池保持構造。
（２）前記電池と前記アッパケースとの間には、弾性部材が配設されており、該弾性部材により、前記電池は前記ケースの下壁に押し付けられている、（１）記載の電池保持構造。 The present invention for achieving the above object is as follows.
(1) having a battery and a resin case covering the battery;
The battery is accommodated in the case in contact with at least the lower wall of the case,
The case includes a lower case including the lower wall and a side wall rising from the lower wall, and an upper case fixed to the lower case, and seals the battery,
The lower case is attached to the vehicle body side member in a state where the lower wall is in contact with the vehicle body side member disposed outside the case,
The battery holding structure, wherein a thickness of a lower wall of the lower case is set to be thinner than a side wall of the lower case, and is a thickness capable of transmitting heat of the battery to the vehicle body side member.
(2) The battery holder according to (1), wherein an elastic member is disposed between the battery and the upper case, and the battery is pressed against a lower wall of the case by the elastic member. Construction.

上記（１）の電池保持構造によれば、ケースが電池を密閉しているため、ケース内に埃、ゴミおよび水が入り込むことを、従来に比べて抑制できる。
なお、ロアケースの下壁の板厚が、ロアケースの側壁に比べて薄く設定されており、電池の熱を車体側部材に伝達可能とされているため、薄肉にすることで熱抵抗を下げることができ、車体側部材に熱を効果的に伝達することができる。よって、ケースで電池を密閉した場合であっても、電池を冷却することができる。 According to the battery holding structure of (1) above, since the case seals the battery, it is possible to suppress dust, dust, and water from entering the case as compared with the conventional case.
In addition, the plate thickness of the lower wall of the lower case is set to be thinner than the side wall of the lower case, and the heat of the battery can be transferred to the vehicle body side member. And heat can be effectively transferred to the vehicle body side member. Therefore, even when the battery is sealed with a case, the battery can be cooled.

上記（２）の電池保持構造によれば、弾性部材により、電池がケースの下壁に押し付けられているため、電池とケース下壁との安定した接圧を確保でき、安定した電池冷却効果を得ることができる。 According to the battery holding structure of (2) above, since the battery is pressed against the lower wall of the case by the elastic member, a stable contact pressure between the battery and the lower wall of the case can be secured, and a stable battery cooling effect can be obtained. Can be obtained.

本発明実施例の電池保持構造の概略斜視図である。It is a schematic perspective view of the battery holding structure of an Example of this invention. 本発明実施例の電池保持構造の断面図である。It is sectional drawing of the battery holding structure of this invention Example. 従来の電池保持構造の模式図である。It is a schematic diagram of the conventional battery holding structure.

以下に、本発明実施例の電池保持構造を、図面を参照して、説明する。
本発明実施例の電池保持構造１０は、たとえば、ハイブリッド自動車、電池自動車等に搭載される。保持構造１０は、図１、図２に示すように、電池２０と、電池２０を覆うケース３０と、弾性部材４０と、を有する。 Hereinafter, a battery holding structure according to an embodiment of the present invention will be described with reference to the drawings.
The battery holding structure 10 according to the embodiment of the present invention is mounted on, for example, a hybrid vehicle, a battery vehicle, or the like. As shown in FIGS. 1 and 2, the holding structure 10 includes a battery 20, a case 30 that covers the battery 20, and an elastic member 40.

電池２０は、図１に示すように、角型の電池であり、単一のケース３０内に、複数積層された状態で収容されている。ケース３０内に収容される電池２０の数は、図示例では４個であるが、４個に限定されるものではなく、２個または３個であってもよく、５個以上であってもよい。電池２０は、二次電池であり、たとえばリチウムイオン電池である。各電池２０の上面には、プラスとマイナスの端子２１がそれぞれ１個ずつ設けられている。また、両端子２１、２１間には、電池２０の内部短絡等により電池２０の温度が上昇して電池２０の内圧が所定値以上となったときに、電池２０内のガスを電池２０の外部に放出する安全弁２２が設けられている。 As shown in FIG. 1, the battery 20 is a rectangular battery, and is housed in a single case 30 in a stacked state. The number of batteries 20 accommodated in the case 30 is four in the illustrated example, but is not limited to four, and may be two or three, or may be five or more. Good. The battery 20 is a secondary battery, for example, a lithium ion battery. One positive terminal 21 and one negative terminal 21 are provided on the upper surface of each battery 20. In addition, when the temperature of the battery 20 rises due to an internal short circuit of the battery 20 and the internal pressure of the battery 20 exceeds a predetermined value, the gas in the battery 20 is exchanged between the terminals 21 and 21 outside the battery 20. A safety valve 22 is provided for discharging the battery.

ケース３０は、熱伝導性を有するとともに電気絶縁性を有する樹脂製である。ケース３０は、図２に示すように、電池２０を密閉している。ケース３０は、ケース３０の外部に配置される、たとえば金属製の車体側部材５０に、締結等の方法で固定して取付けられる。 The case 30 is made of a resin having thermal conductivity and electrical insulation. As shown in FIG. 2, the case 30 seals the battery 20. The case 30 is fixedly attached to a vehicle body side member 50 that is disposed outside the case 30 by, for example, a fastening method.

ケース３０は、下壁３１ａと下壁３１ａの縁から立ち上がる側壁３１ｂを備えるロアケース３１と、ロアケース３１の上側に配置されてロアケース３１に固定して取付けられるアッパケース３２と、を備える。電池２０は、ロアケース３１内に収容されており、ロアケース３１とアッパケース３２とでケース３０の外部から密閉されている。 The case 30 includes a lower case 31 having a lower wall 31a and a side wall 31b rising from the edge of the lower wall 31a, and an upper case 32 disposed on the lower case 31 and fixedly attached to the lower case 31. The battery 20 is accommodated in the lower case 31, and is sealed from the outside of the case 30 with the lower case 31 and the upper case 32.

ロアケース３１（ケース３０）の下壁３１ａには、電池２０の下面が、常時、面接触している。ロアケース３１（ケース３０）の側壁３１ｂには、電池２０の側面が接触していてもよく、非接触であってもよい。アッパケース３２（ケース３０の上壁）には、端子２１を除いて電池２０の上面は非接触となっている。 The lower surface 31a of the lower case 31 (case 30) is always in surface contact with the lower surface of the battery 20. The side surface 31b of the lower case 31 (case 30) may be in contact with the side surface of the battery 20, or may be non-contact. The upper surface of the battery 20 is not in contact with the upper case 32 (the upper wall of the case 30) except for the terminals 21.

ロアケース３１の下壁３１ａは、電池２０の熱を車体側部材に伝わらせて電池２０を冷却するのに利用される。ロアケース３１の下壁３１ａは、車体側部材５０に面接触している。下壁３１ａは、下壁３１ａの全体で車体側部材５０に面接触していることが望ましい。下壁３１ａを介して行われる車体側部材５０への熱伝達効率が高まるからである。また、下壁３１ａの剛性が低くてもロアケース３１（ケース３０）の変形を抑制できるからである。下壁３１ａの板厚は、ロアケース３１の側壁３１ｂに比べて薄く設定されており、電池２０の熱を車体側部材５０に伝達可能な厚さとされている。なお、下壁３１ａの板厚は、たとえば０．２ｍｍ程度である。 The lower wall 31a of the lower case 31 is used for transferring the heat of the battery 20 to the vehicle body side member and cooling the battery 20. The lower wall 31 a of the lower case 31 is in surface contact with the vehicle body side member 50. It is desirable that the lower wall 31a is in surface contact with the vehicle body side member 50 as a whole of the lower wall 31a. This is because the efficiency of heat transfer to the vehicle body side member 50 performed through the lower wall 31a is increased. Further, even if the rigidity of the lower wall 31a is low, deformation of the lower case 31 (case 30) can be suppressed. The plate thickness of the lower wall 31 a is set to be thinner than the side wall 31 b of the lower case 31, and is a thickness that can transfer the heat of the battery 20 to the vehicle body side member 50. In addition, the plate | board thickness of the lower wall 31a is about 0.2 mm, for example.

アッパケース３２は平板状である。アッパケース３２は、ロアケース３１の側壁３１ｂの上端に、溶着、締結等によりロアケース３１との間に隙間が無い状態で（密閉状態で）、固定して取付けられる。アッパケース３２には、電池２０の端子２１に接続されるバスバー３２ａがインサート成形等にて一体化されている。バスバー３２ａは、電池２０の端子２１に常時接触している。 The upper case 32 has a flat plate shape. The upper case 32 is fixedly attached to the upper end of the side wall 31b of the lower case 31 with no gap (sealed) with the lower case 31 by welding, fastening, or the like. A bus bar 32a connected to the terminal 21 of the battery 20 is integrated with the upper case 32 by insert molding or the like. The bus bar 32 a is always in contact with the terminal 21 of the battery 20.

弾性部材４０は、電池２０とアッパケース３２とに配設されている。弾性部材４０は、電池２０およびアッパケース３２とは別部品であり、電池２０とアッパケース３２とで挟持されている。弾性部材４０は、電池２０とアッパケース３２の一方に固定して取付けられていてもよい。弾性部材４０は、たとえばエラストマ製であり、自身が圧縮されることで弾性変形可能である。ただし、弾性部材４０は、板バネ形状であってもよく、この場合エラストマ製に限定されず、自身が曲げ変形されることで弾性変形可能とされていてもよい。弾性部材４０は、弾性変形している状態で電池２０とアッパケース３２との間に配設されている。このため、電池２０は、弾性部材４０により、ロアケース３１（ケース３０）の下壁３１ａに押し付けられており、ケース３０内での移動を抑制されている。 The elastic member 40 is disposed on the battery 20 and the upper case 32. The elastic member 40 is a separate component from the battery 20 and the upper case 32, and is sandwiched between the battery 20 and the upper case 32. The elastic member 40 may be fixedly attached to one of the battery 20 and the upper case 32. The elastic member 40 is made of an elastomer, for example, and can be elastically deformed by being compressed. However, the elastic member 40 may be in the form of a leaf spring, and in this case, the elastic member 40 is not limited to being made of elastomer, and may be elastically deformable by being bent and deformed. The elastic member 40 is disposed between the battery 20 and the upper case 32 while being elastically deformed. For this reason, the battery 20 is pressed against the lower wall 31a of the lower case 31 (case 30) by the elastic member 40, and movement within the case 30 is suppressed.

弾性変形部材４０は、端子２１と安全弁２２との間で、電池２０の上面に接触している。また、弾性変形部材４０は、安全弁２２の両側に安全弁２２からの距離を等しくして一対設けられている。 The elastic deformation member 40 is in contact with the upper surface of the battery 20 between the terminal 21 and the safety valve 22. A pair of elastic deformation members 40 are provided on both sides of the safety valve 22 with the same distance from the safety valve 22.

つぎに、本発明実施例の作用、効果を説明する。
（Ａ）ケース３０が電池１０を密閉しているため、ケース３０内に埃、ゴミおよび水が入り込むことを、従来に比べて抑制できる。 Next, the operation and effect of the embodiment of the present invention will be described.
(A) Since the case 30 seals the battery 10, it is possible to prevent dust, dirt, and water from entering the case 30 as compared to the conventional case.

（Ｂ）ロアケース３１の下壁３１ａの板厚が、ロアケース３１の側壁３１ｂに比べて薄く設定されており、電池２０の熱を車体側部材５０に伝達可能とされているため、薄肉にすることで熱抵抗を下げることができ、車体側部材５０に熱を効果的に伝達することができる。よって、ケース３０で電池２０を密閉した場合であっても、電池２０を効率よく冷却することができる。 (B) The thickness of the lower wall 31a of the lower case 31 is set to be thinner than the side wall 31b of the lower case 31, and the heat of the battery 20 can be transmitted to the vehicle body side member 50. Thus, the thermal resistance can be lowered, and heat can be effectively transmitted to the vehicle body side member 50. Therefore, even when the battery 20 is sealed with the case 30, the battery 20 can be efficiently cooled.

（Ｃ）弾性部材４０により、電池２０がケース３０の下壁３１ａに押し付けられているため、電池２０とケース下壁３１ａとの安定した接圧を確保でき、安定した電池冷却効果を得ることができる。
（Ｄ）弾性変形部材４０が、端子２１と安全弁２２との間で、電池２０の上面に接触しているため、弾性変形部材４０を設けることによる、電池２０の端子２１、安全弁２２への影響を無視することができる。
（Ｅ）弾性変形部材４０が、安全弁２２の両側に安全弁２２からの距離を等しくして一対設けられているため、弾性変形部材４０により電池２０にケース３０内で傾く方向に荷重がかかることを抑制できる。 (C) Since the battery 20 is pressed against the lower wall 31a of the case 30 by the elastic member 40, a stable contact pressure between the battery 20 and the case lower wall 31a can be secured, and a stable battery cooling effect can be obtained. it can.
(D) Since the elastic deformation member 40 is in contact with the upper surface of the battery 20 between the terminal 21 and the safety valve 22, the influence of the elastic deformation member 40 on the terminal 21 and the safety valve 22 of the battery 20 is provided. Can be ignored.
(E) Since a pair of elastic deformation members 40 are provided on both sides of the safety valve 22 with the same distance from the safety valve 22, the elastic deformation member 40 applies a load in a direction in which the battery 20 is inclined in the case 30. Can be suppressed.

（Ｆ）バスバー３２ａがアッパケース３２にインサート成形等で一体化されているため、バスバー３２ａがアッパケース３２に一体化されていない場合に比べて組付けコストを低減できる。 (F) Since the bus bar 32a is integrated with the upper case 32 by insert molding or the like, the assembly cost can be reduced as compared with the case where the bus bar 32a is not integrated with the upper case 32.

１０ 電池保持構造
２０ 電池
２１ 端子
２２ 安全弁
３０ ケース
３１ ロアケース
３１ａ 下壁
３１ｂ 側壁
３２ アッパケース
３２ａ バスバー
４０ 弾性部材
５０ 車体側部材 DESCRIPTION OF SYMBOLS 10 Battery holding structure 20 Battery 21 Terminal 22 Safety valve 30 Case 31 Lower case 31a Lower wall 31b Side wall 32 Upper case 32a Bus bar 40 Elastic member 50 Car body side member

Claims (2)

電池と、該電池を覆う樹脂製ケースと、を有し、
前記電池は、前記ケース内に該ケースの少なくとも下壁に接触させて収容されており、
前記ケースは、前記下壁と該下壁から立ち上がる側壁を備えるロアケースと、該ロアケースに固定されるアッパケースと、を備えており、前記電池を密閉しており、
前記ロアケースは、前記ケースの外部に配置される車体側部材に前記下壁を接触させた状態で、該車体側部材に取付けられており、
前記ロアケースの下壁の板厚は、前記ロアケースの側壁に比べて薄く設定されており、前記電池の熱を前記車体側部材に伝達可能な厚さとされている、電池保持構造。 A battery and a resin case covering the battery;
The battery is accommodated in the case in contact with at least the lower wall of the case,
The case includes a lower case including the lower wall and a side wall rising from the lower wall, and an upper case fixed to the lower case, and seals the battery,
The lower case is attached to the vehicle body side member in a state where the lower wall is in contact with the vehicle body side member disposed outside the case,
The battery holding structure, wherein a thickness of a lower wall of the lower case is set to be thinner than a side wall of the lower case, and is a thickness capable of transmitting heat of the battery to the vehicle body side member. 前記電池と前記アッパケースとの間には、弾性部材が配設されており、該弾性部材により、前記電池は前記ケースの下壁に押し付けられている、請求項１記載の電池保持構造。 The battery holding structure according to claim 1, wherein an elastic member is disposed between the battery and the upper case, and the battery is pressed against a lower wall of the case by the elastic member.
JP2015201187A 2015-10-09 2015-10-09 Battery holding structure Pending JP2017073352A (en)

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JP2019139926A (en) * 2018-02-08 2019-08-22 株式会社デンソー Battery pack

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JPH11250880A (en) * 1998-03-03 1999-09-17 Kenwood Corp Battery containing structure
JP2002334684A (en) * 2001-05-02 2002-11-22 Daiwa Kasei Ind Co Ltd Battery case
JP2011124101A (en) * 2009-12-10 2011-06-23 Mitsubishi Motors Corp Battery case
JP2012252958A (en) * 2011-06-06 2012-12-20 Mitsubishi Motors Corp Battery pack
US20150229010A1 (en) * 2014-02-10 2015-08-13 Samsung Sdi Co., Ltd. Battery pack

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JPH11250880A (en) * 1998-03-03 1999-09-17 Kenwood Corp Battery containing structure
JP2002334684A (en) * 2001-05-02 2002-11-22 Daiwa Kasei Ind Co Ltd Battery case
JP2011124101A (en) * 2009-12-10 2011-06-23 Mitsubishi Motors Corp Battery case
JP2012252958A (en) * 2011-06-06 2012-12-20 Mitsubishi Motors Corp Battery pack
US20150229010A1 (en) * 2014-02-10 2015-08-13 Samsung Sdi Co., Ltd. Battery pack

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Publication number Priority date Publication date Assignee Title
JP2019139926A (en) * 2018-02-08 2019-08-22 株式会社デンソー Battery pack
JP7155528B2 (en) 2018-02-08 2022-10-19 株式会社デンソー battery pack

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