JP2022035425A - Battery system - Google Patents

Battery system Download PDF

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Publication number
JP2022035425A
JP2022035425A JP2020139743A JP2020139743A JP2022035425A JP 2022035425 A JP2022035425 A JP 2022035425A JP 2020139743 A JP2020139743 A JP 2020139743A JP 2020139743 A JP2020139743 A JP 2020139743A JP 2022035425 A JP2022035425 A JP 2022035425A
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Prior art keywords
battery
temperature control
control member
support
batteries
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徹 大西
Toru Onishi
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Toyota Industries Corp
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Toyota Industries Corp
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Priority to JP2020139743A priority Critical patent/JP2022035425A/en
Priority to PCT/JP2021/026487 priority patent/WO2022038927A1/en
Publication of JP2022035425A publication Critical patent/JP2022035425A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

To provide a battery system which can uniformize heat transfer characteristics between batteries and a temperature adjustment member, and can also prevent degradation in the heat transfer characteristics, while preventing the energy of external impact from transferring to the batteries.SOLUTION: A battery system 1 comprises a battery laminate 10, a temperature adjustment member 30, and support members 40. The battery laminate 10 is made up of a plurality of batteries 10a which are laminated on each other. The temperature adjustment member 30 comes into thermal contact with the battery laminate 10 so as to adjust the temperature of the battery laminate 10. The plurality of support members 40 support the temperature adjustment member 30. The temperature adjustment member 30 extends in a lamination direction of the batteries 10a, and it is supported over the plurality of support members 40. Each of the plurality of support members 40 is connected to the batteries 10a different from each other, and each of the support members 40 presses the temperature adjustment member 30 against the battery 10a to which the support member 40 is connected.SELECTED DRAWING: Figure 3

Description

本発明は、電池システムに関する。 The present invention relates to a battery system.

複数の電池を積層してなる電池積層体と電池の温調のための温調部材とが筐体に収容されてなる電池システムが広く使用されている。例えば、特許文献１には、電池積層体の底面に温調部材をあてがうとともに、温調部材と筐体底部との間に設けた板バネにより温調部材を電池積層体の底面に押圧する構成が開示されている。 A battery system in which a battery laminate formed by stacking a plurality of batteries and a temperature control member for controlling the temperature of the batteries are housed in a housing is widely used. For example, in Patent Document 1, a temperature control member is applied to the bottom surface of the battery laminate, and the temperature control member is pressed against the bottom surface of the battery laminate by a leaf spring provided between the temperature control member and the bottom of the housing. Is disclosed.

特許第５５２３５３０号公報Japanese Patent No. 5523530

しかしながら、特許文献１に開示の構成では、板バネが温調部材と筐体底部との間に設けられているため、筐体底部が外部から衝撃を受けると衝撃のエネルギが板バネ及び温調部材を介して電池に伝わり、電池にダメージを与えるおそれがある。また、電池積層体の底面は、積層される電池の大きさのバラツキにより平面となっておらず、電池ごとに段差が生じている。そのため、各電池への温調部材の押し付け力にバラツキが生じることとなり、電池と温調部材との間の伝熱特性が均一とならず、熱効率が低下する。また、電池積層体の底面と温調部材との間に設けた伝熱部材により、電池積層体の底面における上記段差を解消することも考えられるが、当該段差を解消するには伝熱部材の厚さが厚くなりすぎ、電池と温調部材との間の伝熱特性が低下して熱効率が低下する。 However, in the configuration disclosed in Patent Document 1, since the leaf spring is provided between the temperature control member and the bottom of the housing, when the bottom of the housing receives an impact from the outside, the energy of the impact is the leaf spring and the temperature control. It is transmitted to the battery through the member and may damage the battery. Further, the bottom surface of the battery laminate is not flat due to the variation in the size of the stacked batteries, and a step is generated for each battery. Therefore, the pressing force of the temperature control member against each battery will vary, the heat transfer characteristics between the battery and the temperature control member will not be uniform, and the thermal efficiency will decrease. Further, it is conceivable to eliminate the above-mentioned step on the bottom surface of the battery laminate by a heat transfer member provided between the bottom surface of the battery laminate and the temperature control member. The thickness becomes too thick, the heat transfer characteristics between the battery and the temperature control member deteriorate, and the thermal efficiency decreases.

本発明は、かかる課題に鑑みてなされたもので、外部から衝撃のエネルギが電池に伝わることを抑制しつつ、電池と温調部材との間の伝熱特性の均一化を図るとともに伝熱特性の低下の防止を図ることができる電池システムを提供しようとするものである。 The present invention has been made in view of the above problems, and while suppressing the transfer of impact energy from the outside to the battery, the heat transfer characteristics are made uniform between the battery and the temperature control member, and the heat transfer characteristics are achieved. It is intended to provide a battery system capable of preventing a decrease in energy.

本発明の一態様は、複数の電池が積層されてなる電池積層体と、
上記電池積層体に熱的に接して上記電池積層体を温調する温調部材と、
上記温調部材を支持する複数の支持部材と、
を備え、
上記温調部材は、上記電池の積層方向に延在するとともに、複数の上記支持部材に亘って支持されており、
上記複数の支持部材は互いに異なる上記電池に接続されており、上記支持部材はそれぞれ、上記支持部材が接続された上記電池に上記温調部材を押圧している、電池システムにある。 One aspect of the present invention is a battery laminate in which a plurality of batteries are laminated, and
A temperature control member that thermally contacts the battery laminate to control the temperature of the battery laminate,
A plurality of support members that support the temperature control member, and
Equipped with
The temperature control member extends in the stacking direction of the battery and is supported by the plurality of support members.
The plurality of support members are connected to the batteries that are different from each other, and each of the support members is in a battery system in which the temperature control member is pressed against the battery to which the support members are connected.

上記電池システムにおいては、温調部材は電池積層体を構成する電池に接続された支持部材により支持されており、温調部材及び電池積層体を電池システムの外形を形成する筐体底部と分離することができる。これにより、筐体底部に外部から加わった衝撃のエネルギが電池に伝わることが抑制される。また、温調部材を支持する複数の支持部材は、電池積層体を構成する複数の電池のうち互いに異なる電池に接続されている。そして、支持部材はそれぞれの支持部材が接続された電池に温調部材を押圧している。そのため、電池の大きさのバラツキに起因して電池積層体の底面に段差が生じていたとしても、温調部材は支持部材の押圧により当該段差に追従して変形することができる。その結果、電池と温調部材との間の伝熱特性の均一化を図ることができる。また、温調部材が電池積層体の底面の段差に追従して変形するため、温調部材と電池との距離を小さいまま維持することができ電池と温調部材との間の伝熱特性の低下の防止を図ることができる。 In the above battery system, the temperature control member is supported by a support member connected to the battery constituting the battery laminate, and the temperature control member and the battery laminate are separated from the bottom of the housing forming the outer shape of the battery system. be able to. As a result, the energy of the impact applied from the outside to the bottom of the housing is suppressed from being transmitted to the battery. Further, the plurality of support members that support the temperature control member are connected to different batteries among the plurality of batteries constituting the battery laminate. Then, the support member presses the temperature control member against the battery to which each support member is connected. Therefore, even if a step is generated on the bottom surface of the battery laminate due to the variation in the size of the battery, the temperature control member can be deformed following the step by pressing the support member. As a result, the heat transfer characteristics between the battery and the temperature control member can be made uniform. In addition, since the temperature control member deforms following the step on the bottom surface of the battery laminate, the distance between the temperature control member and the battery can be kept small, and the heat transfer characteristics between the battery and the temperature control member can be maintained. It is possible to prevent the decrease.

以上のごとく、上記態様によれば、外部から衝撃のエネルギが電池に伝わることを抑制しつつ、電池と温調部材との間の伝熱特性の均一化を図るとともに伝熱特性の低下の防止を図ることができる電池システムを提供することができる。 As described above, according to the above aspect, while suppressing the transfer of impact energy from the outside to the battery, the heat transfer characteristics between the battery and the temperature control member are made uniform and the deterioration of the heat transfer characteristics is prevented. It is possible to provide a battery system capable of achieving the above.

実施形態１における、電池システムの斜視図。The perspective view of the battery system in Embodiment 1. FIG. 実施形態１における、電池、温調部材及び支持部材の組付け後の斜視図。The perspective view after assembling the battery, the temperature control member and the support member in Embodiment 1. FIG. 図１における、III-III線位置断面図。FIG. 1 is a sectional view taken along line III-III. 実施形態１における、電池、温調部材及び支持部材の組付け前の斜視図。The perspective view before assembling the battery, the temperature control member, and the support member in Embodiment 1. FIG. 図３における、V-V線位置断面図。FIG. 3 is a sectional view taken along line V-V. 実施形態２における、電池、温調部材及び支持部材の組付け後の斜視図。The perspective view after assembling the battery, the temperature control member and the support member in Embodiment 2. FIG. 実施形態２における、図１のIII-III線位置断面図。FIG. 1 is a sectional view taken along line III-III of FIG. 1 in the second embodiment. 実施形態２における、電池、温調部材及び支持部材の組付け前の斜視図。The perspective view before assembling the battery, the temperature control member and the support member in Embodiment 2. FIG. 実施形態２における、温調部材の組付け態様を説明する概念図。The conceptual diagram explaining the assembly mode of the temperature control member in Embodiment 2. （ａ）変形形態１における支持部材の底面図、（ｂ）変形形態１における支持部材の一部拡大斜視図。(A) A bottom view of the support member in the modified form 1, and (b) a partially enlarged perspective view of the support member in the modified form 1. （ａ）変形形態２における支持部材の底面図、（ｂ）変形形態３における支持部材の底面図。(A) Bottom view of the support member in the modified form 2, and (b) Bottom view of the support member in the modified form 3. （ａ）変形形態４における支持部材の一部拡大断面図、（ｂ）変形形態４における支持部材の一部拡大斜視図。(A) Partially enlarged cross-sectional view of the support member in the modified form 4, and (b) Partially enlarged perspective view of the support member in the modified form 4.

上記支持部材は、上記電池の側面又は隣り合う他の電池に対向する上記電池の背面に接して上記電池に接続される電池接続部と、上記電池の下面に対向する位置において凹状に形成されて上記温調部材が配置される支持凹部と、を有することとすることができる。この場合には、温調部材を上記支持凹部により確実に支持して電池に押圧することができるため、電池と温調部材との間の伝熱特性を一層均一化することができる。 The support member is formed in a concave shape at a position facing the lower surface of the battery and the battery connection portion connected to the battery in contact with the side surface of the battery or the back surface of the battery facing the other adjacent battery. It may have a support recess in which the temperature control member is arranged. In this case, since the temperature control member can be reliably supported by the support recess and pressed against the battery, the heat transfer characteristics between the battery and the temperature control member can be further made uniform.

上記支持部材は、上記電池の側面又は隣り合う他の電池に対向する上記電池の背面に接続される電池接続部と、上記電池の下面に対向する位置において上記電池と反対側に突出して上記温調部材を係止する一対の係止爪とを有することとすることができる。この場合には、電池接続部を介して支持部材を電池に取り付けて、電池積層体を形成した後に、係止爪を介して温調部材を取り付けることができる。そのため、組付の作業性が向上するとともに、電池接続部を広く確保しやすくなるため、支持部材の強度を高めることができる。 The support member projects to the side opposite to the battery at a position facing the lower surface of the battery and a battery connection portion connected to the side surface of the battery or the back surface of the battery facing the other adjacent battery, and the temperature thereof. It may have a pair of locking claws for locking the tuning member. In this case, the support member can be attached to the battery via the battery connection portion to form the battery laminate, and then the temperature control member can be attached via the locking claw. Therefore, the workability of assembly is improved, and it becomes easy to secure a wide battery connection portion, so that the strength of the support member can be increased.

上記支持部材は、上記複数の電池の半数以上に設けられていることが好ましい。この場合は、支持部材の押圧により、電池積層体の下面の段差に追従して温調部材を変形させやすくなるため、電池と温調部材との間の伝熱特性を一層均一化することができる。 It is preferable that the support member is provided in more than half of the plurality of batteries. In this case, the pressure of the support member makes it easier to deform the temperature control member by following the step on the lower surface of the battery laminate, so that the heat transfer characteristics between the battery and the temperature control member can be further made uniform. can.

（実施形態１）
上記電池システムの実施形態について、図１～図５を用いて説明する。
本実施形態の電池システム１は、電池積層体１０、温調部材３０、支持部材４０を備える。
電池積層体１０は、複数の電池１０ａが積層されてなる。
温調部材３０は、電池積層体１０に熱的に接して電池積層体１０を温調する。
支持部材４０は複数備えられ、温調部材３０を支持する。
そして、図５に示すように、温調部材３０は、電池１０ａの積層方向Ｙに延在するとともに、複数の支持部材４０に亘って支持されている。
複数の支持部材４０は互いに異なる電池１０ａに接続されており、支持部材４０はそれぞれ、支持部材４０が接続された電池１０ａに温調部材３０を押圧している。 (Embodiment 1)
The embodiment of the battery system will be described with reference to FIGS. 1 to 5.
The battery system 1 of the present embodiment includes a battery laminate 10, a temperature control member 30, and a support member 40.
The battery laminate 10 is formed by laminating a plurality of batteries 10a.
The temperature control member 30 is in thermal contact with the battery stack 10 to control the temperature of the battery stack 10.
A plurality of support members 40 are provided to support the temperature control member 30.
Then, as shown in FIG. 5, the temperature control member 30 extends in the stacking direction Y of the battery 10a and is supported over a plurality of support members 40.
The plurality of support members 40 are connected to different batteries 10a, and each of the support members 40 presses the temperature control member 30 against the battery 10a to which the support member 40 is connected.

以下、本実施形態の電池システム１について、詳述する。
図１に示すように、電池１０ａは、複数備えられてＹ方向に積層されている。電池１０ａの数は特に限定されないが、本実施形態１では２０個の電池１０ａを備える。電池１０ａの種類は限定されず、充放電可能な二次電池とすることができる。当該複数の電池１０ａが積層されることにより、電池積層体１０が形成される。本実施形態１では、電池１０ａは上面１１に端子１１ａが設けられており、電池１０ａの下面１２は平面となっている。電池積層体１０において各電池１０ａは端子１１ａが同じ側に位置するように形を揃えて積層されている。なお、電池積層体１０において隣り合う電池１０ａ同士の間に図示しないスペーサが介在していてもよい。 Hereinafter, the battery system 1 of the present embodiment will be described in detail.
As shown in FIG. 1, a plurality of batteries 10a are provided and stacked in the Y direction. The number of batteries 10a is not particularly limited, but the first embodiment includes 20 batteries 10a. The type of the battery 10a is not limited, and a secondary battery that can be charged and discharged can be used. By stacking the plurality of batteries 10a, the battery laminate 10 is formed. In the first embodiment, the battery 10a is provided with a terminal 11a on the upper surface 11, and the lower surface 12 of the battery 10a is a flat surface. In the battery laminate 10, each battery 10a is laminated so that the terminals 11a are located on the same side. In the battery laminate 10, a spacer (not shown) may be interposed between adjacent batteries 10a.

図１に示すように、電池積層体１０の積層方向Ｙの両端側には、それぞれ一対のエンドプレート１５が設けられている。本実施形態１では、エンドプレート１５の外形は平面視において電池１０ａよりも若干大きくなっている。エンドプレート１５は、剛性の高い金属製とすることができる。 As shown in FIG. 1, a pair of end plates 15 are provided on both ends of the battery laminate 10 in the stacking direction Y. In the first embodiment, the outer shape of the end plate 15 is slightly larger than that of the battery 10a in a plan view. The end plate 15 can be made of a highly rigid metal.

図１に示すように、電池積層体１０は拘束プレート２０により、積層方向Ｙに拘束されている。拘束プレート２０は、電池積層体１０の両端に位置するエンドプレート１５にそれぞれ接続されて、エンドプレート１５によって電池積層体１０を挟持させる。拘束プレート２０は金属製の長板からなる。本実施形態１では、拘束プレート２０はエンドプレート１５の高さ方向Ｚにおける上面と下面のそれぞれ２箇所に取り付けられて、合計４つ設けられている。拘束プレート２０は、ボルト２１によりエンドプレート１５に締結されている。電池積層体１０は、拘束プレート２０を介して一対のエンドプレート１５によって挟持されて積層方向Ｙに拘束されることにより、積層状態に維持されるとともに電池１０ａが積層方向Ｙに膨張することが抑制されている。 As shown in FIG. 1, the battery laminate 10 is constrained in the stacking direction Y by the restraint plate 20. The restraint plate 20 is connected to end plates 15 located at both ends of the battery laminate 10, and the battery laminate 10 is sandwiched by the end plates 15. The restraint plate 20 is made of a metal long plate. In the first embodiment, the restraint plates 20 are attached to the upper surface and the lower surface of the end plate 15 in the height direction Z, respectively, and a total of four restraint plates 20 are provided. The restraint plate 20 is fastened to the end plate 15 by bolts 21. The battery laminate 10 is sandwiched by the pair of end plates 15 via the restraint plate 20 and restrained in the stacking direction Y, so that the battery stack 10a is maintained in the laminated state and the battery 10a is suppressed from expanding in the stacking direction Y. Has been done.

図２、図３に示すように、電池積層体１０の下方Ｚ２には、電池１０ａを冷却又は加熱して温調する温調部材３０が設けられている。温調部材３０は、積層方向Ｙに延在しており、本実施形態１では、図４に示すように、内部に熱媒体が流通可能な流路３１を備える。なお、図示しないが、温調部材３０には、熱媒体を温調部材３０に導入するための熱媒体導入部と、熱媒体を温調部材３０から導出するための熱媒体導出部が備えられている。 As shown in FIGS. 2 and 3, a temperature control member 30 for cooling or heating the battery 10a to control the temperature is provided in the lower Z2 of the battery stack 10. The temperature control member 30 extends in the stacking direction Y, and in the first embodiment, as shown in FIG. 4, a flow path 31 through which a heat medium can flow is provided inside. Although not shown, the temperature control member 30 is provided with a heat medium introduction unit for introducing a heat medium into the temperature control member 30 and a heat medium lead-out unit for deriving the heat medium from the temperature control member 30. ing.

本実施形態１では、図３、図５に示すように、温調部材３０と電池積層体１０との間には、伝熱部材３５が介在している。伝熱部材３５は、高い熱伝導度を有する材料からなり、温調部材３０と電池積層体１０との両方に密着した状態となっている。 In the first embodiment, as shown in FIGS. 3 and 5, a heat transfer member 35 is interposed between the temperature control member 30 and the battery laminate 10. The heat transfer member 35 is made of a material having high thermal conductivity, and is in close contact with both the temperature control member 30 and the battery laminate 10.

図２に示すように、支持部材４０は、温調部材３０を支持している。本実施形態１では、支持部材４０は樹脂製であって図４に示すように、電池１０ａに接続される電池接続部４１と温調部材３０が配置される支持凹部４２とを有する。電池接続部４１は電池１０ａの側面１３に沿って立設されている。本実施形態１では、電池接続部４１は符号４１ａで示すように、隣り合う他の電池に対向する電池１０ａの背面１４に回り込んでいる。ただし、電池１０ａの背面１４に対向する位置において、積層方向Ｙから見て後述の支持凹部４２の上側の領域には電池接続部４１は形成されずに開放しており開放部４３が形成されている。電池接続部４１を介して支持部材４０は電池１０ａに接続されている。なお、電池接続部４１における接続態様は限定されない。 As shown in FIG. 2, the support member 40 supports the temperature control member 30. In the first embodiment, the support member 40 is made of resin and has a battery connection portion 41 connected to the battery 10a and a support recess 42 in which the temperature control member 30 is arranged, as shown in FIG. The battery connection portion 41 is erected along the side surface 13 of the battery 10a. In the first embodiment, as indicated by reference numeral 41a, the battery connection portion 41 wraps around the back surface 14 of the battery 10a facing another adjacent battery. However, at the position facing the back surface 14 of the battery 10a, the battery connecting portion 41 is open without being formed in the region above the support recess 42 described later when viewed from the stacking direction Y, and the open portion 43 is formed. There is. The support member 40 is connected to the battery 10a via the battery connection portion 41. The connection mode of the battery connection unit 41 is not limited.

図４に示すように、支持凹部４２は、電池１０ａの下面１２に対向する位置において凹状に形成されている。支持凹部４２の積層方向Ｙは両側とも開放されており、図３に示すように積層方向Ｙに延在する温調部材３０が支持凹部４２に入り込んで配置できるように構成されている。本実施形態１では、支持凹部４２の深さは、温調部材３０の厚さと伝熱部材３５の厚さの合計よりも若干小さく設定されている。そして、本実施形態１では、図４に示すように、電池接続部４１を電池１０ａに接続する前に、高さ方向Ｚにおいて温調部材３０を開放部４３を介して支持凹部４２に配置した後、図２に示すように、電池１０ａを電池接続部４１に嵌め込んで接続する。その後、図１に示すように、エンドプレート１５と拘束プレート２０で電池積層体１０を拘束する。これにより、図５に示すように、温調部材３０は複数の支持部材４０に亘って支持されるとともに、支持凹部４２により電池１０ａの下面１２に向けて押圧される。そして、支持部材４０は電池システム１の筐体２に直接固定されず、支持部材４０と筐体２とは離間した状態となっている。 As shown in FIG. 4, the support recess 42 is formed in a concave shape at a position facing the lower surface 12 of the battery 10a. The stacking direction Y of the support recess 42 is open on both sides, and as shown in FIG. 3, the temperature control member 30 extending in the stacking direction Y is configured to enter the support recess 42 and be arranged. In the first embodiment, the depth of the support recess 42 is set to be slightly smaller than the total thickness of the temperature control member 30 and the heat transfer member 35. Then, in the first embodiment, as shown in FIG. 4, the temperature control member 30 is arranged in the support recess 42 via the open portion 43 in the height direction Z before the battery connection portion 41 is connected to the battery 10a. Later, as shown in FIG. 2, the battery 10a is fitted into the battery connection portion 41 and connected. Then, as shown in FIG. 1, the battery laminate 10 is constrained by the end plate 15 and the restraint plate 20. As a result, as shown in FIG. 5, the temperature control member 30 is supported over the plurality of support members 40 and is pressed toward the lower surface 12 of the battery 10a by the support recess 42. The support member 40 is not directly fixed to the housing 2 of the battery system 1, and the support member 40 and the housing 2 are separated from each other.

支持部材４０を設ける数は特に限定されず、電池積層体１０を構成する複数の電池１０ａのすべてに設けてもよいし、複数の電池１０ａの一部に設けてもよく、複数の電池１０ａの半数以上に設けることが好ましい。本実施形態１ではすべての電池１０ａに支持部材４０を設けている。支持部材４０を一部の電池１０ａに設ける場合、支持部材４０が設けられていない電池１０ａにおいても近傍の電池１０ａに設けられた支持部材４０において温調部材３０が電池１０ａに押し付けられることにより、温調部材３０の電池１０ａへの押し付け力が生じることとなる。そして、支持部材４０を一部の電池１０ａに設ける場合は、積層方向Ｙにおいて、支持部材４０が所定間隔に配置されるように支持部材４０を設ける電池１０ａを選択することが好ましい。これにより、温調部材３０の電池１０ａへの押し付け力を均等化しやすくなる。 The number of the support members 40 is not particularly limited, and the support members 40 may be provided on all of the plurality of batteries 10a constituting the battery laminate 10, may be provided on a part of the plurality of batteries 10a, or may be provided on a part of the plurality of batteries 10a. It is preferable to provide more than half. In the first embodiment, the support member 40 is provided in all the batteries 10a. When the support member 40 is provided on a part of the batteries 10a, the temperature control member 30 is pressed against the battery 10a by the support member 40 provided on the nearby battery 10a even in the battery 10a without the support member 40. A pressing force of the temperature control member 30 against the battery 10a is generated. When the support member 40 is provided in a part of the batteries 10a, it is preferable to select the battery 10a in which the support members 40 are provided so that the support members 40 are arranged at predetermined intervals in the stacking direction Y. This makes it easier to equalize the pressing force of the temperature control member 30 against the battery 10a.

次に、本実施形態の電池システム１における作用効果について、詳述する。
本実施形態の電池システム１では、温調部材３０は電池積層体１０を構成する電池１０ａに接続された支持部材４０により支持されており、温調部材３０及び電池積層体１０を電池システム１の外形を形成する筐体２の底部と分離することができる。これにより、筐体２の底部に外部から加わった衝撃のエネルギが電池１０ａに伝わることが抑制される。また、温調部材３０を支持する複数の支持部材４０は、電池積層体１０を構成する複数の電池１０ａのうち互いに異なる電池１０ａに接続されている。そして、支持部材４０は、図５に示すように、それぞれの支持部材４０が接続された電池１０ａに温調部材３０を押圧している。そのため、電池１０ａの大きさのバラツキに起因して電池積層体１０の底面に段差が生じていたとしても、温調部材３０は支持部材４０の押圧により当該段差に追従して変形することができる。その結果、電池１０ａと温調部材３０との間の伝熱特性の均一化を図ることができる。また、温調部材３０が電池積層体１０の底面の段差に追従して変形するため、温調部材３０と電池１０ａとの距離を小さいまま維持することができ、電池１０ａと温調部材３０との間の伝熱特性の低下の防止を図ることができる。 Next, the operation and effect of the battery system 1 of the present embodiment will be described in detail.
In the battery system 1 of the present embodiment, the temperature control member 30 is supported by the support member 40 connected to the battery 10a constituting the battery laminate 10, and the temperature control member 30 and the battery stack 10 are supported by the battery system 1. It can be separated from the bottom of the housing 2 that forms the outer shape. As a result, the energy of the impact applied from the outside to the bottom of the housing 2 is suppressed from being transmitted to the battery 10a. Further, the plurality of support members 40 that support the temperature control member 30 are connected to different batteries 10a among the plurality of batteries 10a constituting the battery laminate 10. Then, as shown in FIG. 5, the support member 40 presses the temperature control member 30 against the battery 10a to which each support member 40 is connected. Therefore, even if a step is generated on the bottom surface of the battery laminate 10 due to the variation in the size of the battery 10a, the temperature control member 30 can be deformed following the step by pressing the support member 40. .. As a result, the heat transfer characteristics between the battery 10a and the temperature control member 30 can be made uniform. Further, since the temperature control member 30 is deformed following the step on the bottom surface of the battery laminate 10, the distance between the temperature control member 30 and the battery 10a can be kept small, and the battery 10a and the temperature control member 30 can be maintained. It is possible to prevent deterioration of the heat transfer characteristics during the period.

本実施形態１では、電池１０ａと温調部材３０との間に伝熱部材３５が設けられている。そして、上述の通り、温調部材３０は支持部材４０の押圧により当該段差に追従して変形することができる。そのため、支持部材４０の単品の公差と温調部材３０の厚さ公差のみが伝熱部材３５の厚さばらつきとなり公差縮小でき、伝熱材厚さの呼び値も小さくできる。その結果、電池１０ａと温調部材３０との間の伝熱特性の向上を図ることができる。 In the first embodiment, the heat transfer member 35 is provided between the battery 10a and the temperature control member 30. Then, as described above, the temperature control member 30 can be deformed following the step by pressing the support member 40. Therefore, only the tolerance of the individual support member 40 and the thickness tolerance of the temperature control member 30 cause the thickness variation of the heat transfer member 35, so that the tolerance can be reduced and the nominal value of the heat transfer material thickness can be reduced. As a result, the heat transfer characteristics between the battery 10a and the temperature control member 30 can be improved.

また、本実施形態１では、支持部材４０は、電池１０ａの側面１３に接して電池１０ａに接続される電池接続部４１と、電池１０ａの下面１２に対向する位置において凹状に形成されて温調部材３０が配置される支持凹部４２とを有する。これにより、温調部材３０を支持凹部４２により確実に支持して電池１０ａに押圧することができるため、電池１０ａと温調部材３０との間の伝熱特性を一層均一化することができる。 Further, in the first embodiment, the support member 40 is formed in a concave shape at a position facing the battery connecting portion 41 which is in contact with the side surface 13 of the battery 10a and is connected to the battery 10a and the lower surface 12 of the battery 10a to control the temperature. It has a support recess 42 in which the member 30 is arranged. As a result, the temperature control member 30 can be reliably supported by the support recess 42 and pressed against the battery 10a, so that the heat transfer characteristics between the battery 10a and the temperature control member 30 can be further made uniform.

また、本実施形態１では、支持部材４０は、複数の電池１０ａの半数以上に設けられている。これにより、支持部材４０の押圧により、温調部材３０を電池積層体１０の下面の段差に追従して変形させやすくなるため、電池１０ａと温調部材３０との間の伝熱特性を一層均一化することができる。 Further, in the first embodiment, the support member 40 is provided on more than half of the plurality of batteries 10a. As a result, the temperature control member 30 is easily deformed by following the step on the lower surface of the battery laminate 10 by pressing the support member 40, so that the heat transfer characteristics between the battery 10a and the temperature control member 30 are more uniform. Can be transformed into.

以上のごとく、上記態様によれば、外部から衝撃のエネルギが電池１０ａに伝わることを抑制しつつ、電池１０ａと温調部材３０との間の伝熱特性の均一化を図るとともに伝熱特性の低下の防止を図ることができる電池システム１を提供することができる。 As described above, according to the above aspect, while suppressing the transfer of impact energy from the outside to the battery 10a, the heat transfer characteristics are made uniform between the battery 10a and the temperature control member 30, and the heat transfer characteristics are improved. It is possible to provide a battery system 1 capable of preventing deterioration.

（実施形態２）
上述の実施形態１では、図４に示すように、支持部材４０は凹状の支持凹部４２を備えることとしたが、これに替えて、本実施形態２の電池システム１では、図７、図８に示すように、支持部材４０は、電池１０ａの下面１２に対向する位置に、電池１０ａと反対側に突出して温調部材３０を幅方向Ｘに挟み込んで係止する複数の係止爪４２１を有する。 (Embodiment 2)
In the above-described first embodiment, as shown in FIG. 4, the support member 40 is provided with the concave support recess 42. Instead, in the battery system 1 of the second embodiment, FIGS. 7 and 8 are provided. As shown in the above, the support member 40 has a plurality of locking claws 421 that project to the opposite side of the battery 10a and sandwich and lock the temperature control member 30 in the width direction X at a position facing the lower surface 12 of the battery 10a. Have.

さらに、実施形態１では支持部材４０は、電池１０ａの背面１４に対向する位置に開放部４３が形成されていたが、本実施形態２では、図８において符号４１ａで示すように、電池接続部４１は電池１０ａの背面１４全体に回り込んでおり、電池１０ａの背面１４に対向する位置に開放部４３が形成されない構成となっている。一方、本実施形態２では、支持部材４０は、下方Ｚ２に向けて開放した開放部４４を有しており、電池１０ａの積層方向Ｙ及び高さ方向Ｚに直交する幅方向Ｘにおいて、開放部４４の両端にそれぞれ係止爪４２１が一つ設けられている。すなわち、幅方向Ｘに互いに対向する一対の係止爪４２１の間の領域は下方Ｚ２に向けて開放した開放部４４となっている。 Further, in the first embodiment, the support member 40 has an open portion 43 formed at a position facing the back surface 14 of the battery 10a, but in the second embodiment, as shown by reference numeral 41a in FIG. 8, the battery connection portion is formed. The 41 wraps around the entire back surface 14 of the battery 10a, and the opening portion 43 is not formed at a position facing the back surface 14 of the battery 10a. On the other hand, in the second embodiment, the support member 40 has an open portion 44 that is open toward the lower side Z2, and is an open portion in the width direction X orthogonal to the stacking direction Y and the height direction Z of the battery 10a. One locking claw 421 is provided at both ends of the 44. That is, the region between the pair of locking claws 421 facing each other in the width direction X is an open portion 44 that opens toward the lower Z2.

そして、温調部材３０を組み付ける際には、まず、電池１０ａに支持部材４０を取り付けて、エンドプレート１５と拘束プレート２０で電池積層体１０を拘束した後、図９に示すように、伝熱部材３５を重ねた温調部材３０を支持部材４０の一対の係止爪４２１の間に押し込む。これにより、一対の係止爪４２１を幅方向Ｘに若干押し広げて、温調部材３０及び伝熱部材３５が一対の係止爪４２１を乗り越えるようにする。本実施形態２では、一対の係止爪４２１の先端４２２を傾斜させて、温調部材３０及び伝熱部材３５が一対の係止爪４２１を乗り越えやすくしている。 When assembling the temperature control member 30, first, the support member 40 is attached to the battery 10a, the battery laminate 10 is restrained by the end plate 15 and the restraint plate 20, and then heat transfer is performed as shown in FIG. The temperature control member 30 on which the members 35 are stacked is pushed between the pair of locking claws 421 of the support member 40. As a result, the pair of locking claws 421 is slightly expanded in the width direction X so that the temperature control member 30 and the heat transfer member 35 get over the pair of locking claws 421. In the second embodiment, the tip 422 of the pair of locking claws 421 is tilted so that the temperature control member 30 and the heat transfer member 35 can easily get over the pair of locking claws 421.

そして、図７に示すように、温調部材３０及び伝熱部材３５を電池１０ａの下面１２に当接させるとともに、一対の係止爪４２１により温調部材３０を係止する。これにより、本実施形態２において、図５に示す実施形態１の場合と同様に、温調部材３０は複数の支持部材４０に亘って支持され、電池１０ａの下面１２に押圧される。そして、支持部材４０は電池システム１の筐体２に直接固定されず、支持部材４０と筐体２とは離間した状態となっている。本実施形態２におけるその他の構成要素は実施形態１の場合と同様であり、本実施形態２においても実施形態１の場合と同一の符号を用いてその説明を省略する。 Then, as shown in FIG. 7, the temperature control member 30 and the heat transfer member 35 are brought into contact with the lower surface 12 of the battery 10a, and the temperature control member 30 is locked by the pair of locking claws 421. As a result, in the second embodiment, the temperature control member 30 is supported by the plurality of support members 40 and pressed against the lower surface 12 of the battery 10a, as in the case of the first embodiment shown in FIG. The support member 40 is not directly fixed to the housing 2 of the battery system 1, and the support member 40 and the housing 2 are separated from each other. The other components in the second embodiment are the same as those in the first embodiment, and the same reference numerals as those in the first embodiment are used in the second embodiment, and the description thereof will be omitted.

本実施形態２の電池システム１では、上述のとおり、支持部材４０は、電池１０ａの側面１３に接続される電池接続部４１と、電池１０ａの下面１２に対向する位置において電池１０ａと反対側に突出して温調部材３０を幅方向に挟み込んで係止する複数の係止爪４２１とを有する。これにより、電池接続部４１を介して支持部材４０を電池１０ａに取り付けて電池積層体１０を形成した後に、複数の係止爪４２１を介して温調部材３０を取り付けることができる。そのため、組付の作業性が向上するとともに、実施形態１のように電池１０ａの背面１４に対向する位置に開放部４３を設ける必要がなく、電池接続部４１を広く確保しやすくなるため、支持部材４０の強度を高めることができる。なお、本実施形態２においても、実施形態１における支持凹部４２による作用効果を除いて、実施形態１の場合と同様の作用効果を奏する。 In the battery system 1 of the second embodiment, as described above, the support member 40 is on the opposite side of the battery 10a at a position facing the battery connecting portion 41 connected to the side surface 13 of the battery 10a and the lower surface 12 of the battery 10a. It has a plurality of locking claws 421 that project and sandwich and lock the temperature control member 30 in the width direction. As a result, after the support member 40 is attached to the battery 10a via the battery connection portion 41 to form the battery laminate 10, the temperature control member 30 can be attached via the plurality of locking claws 421. Therefore, the workability of assembly is improved, and it is not necessary to provide the opening portion 43 at a position facing the back surface 14 of the battery 10a as in the first embodiment, and it is easy to secure the battery connecting portion 41 widely. The strength of the member 40 can be increased. It should be noted that also in the second embodiment, the same action and effect as in the case of the first embodiment is obtained except for the action and effect of the support recess 42 in the first embodiment.

本実施形態２では、複数の係止爪４２１として、開放部４４の幅方向Ｘの一端側と他端側に一つずつ設けられた一対の係止爪４２１を備えることとしたが、これに限定されず、例えば、図１０（ａ）、図１０（ｂ）に示す変形形態１のように、係止爪４２１を開放部４４の幅方向Ｘの一端側及び他端側に３つずつ設け、隣り合う係止爪４２１の間にスリット４２３を形成することとしてもよい。これにより、個々の係止爪４２１のＹ方向の長さは、図８に示す実施形態２の場合よりも十分小さくなるため、係止爪４２１の弾性変形が容易となり、温調部材３０の組付作業性を向上させることができる。 In the second embodiment, as the plurality of locking claws 421, a pair of locking claws 421 provided one on one end side and one on the other end side of the opening portion 44 in the width direction X are provided. Not limited to this, for example, as in the modified form 1 shown in FIGS. 10 (a) and 10 (b), three locking claws 421 are provided on one end side and the other end side of the opening portion 44 in the width direction X. A slit 423 may be formed between the adjacent locking claws 421. As a result, the length of each locking claw 421 in the Y direction is sufficiently smaller than that of the second embodiment shown in FIG. 8, so that the locking claw 421 can be easily elastically deformed, and the temperature control member 30 is assembled. Workability can be improved.

また、開放部４４の幅方向Ｘの一端側及び他端側に設ける係止爪４２１の数は限定されず、図１１（ａ）に示す変形形態２のように、開放部４４の幅方向Ｘの一端側及び他端側に２つずつ設けてもよい。また、図１１（ｂ）に示す変形形態３のように、開放部４４の幅方向Ｘの一端側に係止爪４２１を３つ設けるとともに、他端側に係止爪４２１を２つ設けることとしてもよい。 Further, the number of locking claws 421 provided on one end side and the other end side of the opening portion 44 in the width direction X is not limited, and the width direction X of the opening portion 44 is as shown in the modified form 2 shown in FIG. 11A. Two may be provided on one end side and two on the other end side. Further, as in the modified form 3 shown in FIG. 11B, three locking claws 421 are provided on one end side of the opening portion 44 in the width direction X, and two locking claws 421 are provided on the other end side. May be.

また、図１２（ａ）、図１２（ｂ）に示す変形形態４のように、係止爪４２１の基部４２１ａに凹部４２４を設けて、係止爪４２１の基部４２１ａを薄肉としてもよい。変形形態４では係止爪４２１は基部４２１ａにおいて弾性変形が容易となり、温調部材３０の組付作業性を向上させることができる。 Further, as in the modified form 4 shown in FIGS. 12A and 12B, a recess 424 may be provided in the base portion 421a of the locking claw 421 to make the base portion 421a of the locking claw 421 thin. In the modified form 4, the locking claw 421 is easily elastically deformed at the base portion 421a, and the assembling workability of the temperature control member 30 can be improved.

本発明は上記各実施形態に限定されるものではなく、その要旨を逸脱しない範囲において種々の実施形態に適用することが可能である。 The present invention is not limited to each of the above embodiments, and can be applied to various embodiments without departing from the gist thereof.

１ 電池システム
１０ 電池積層体
１０ａ 電池
３０ 温調部材
３５ 伝熱部材
４０ 支持部材
４１ 電池接続部
４２ 支持凹部
４３、４４ 開放部
４２１ 係止爪 1 Battery system 10 Battery laminate 10a Battery 30 Temperature control member 35 Heat transfer member 40 Support member 41 Battery connection part 42 Support recess 43, 44 Open part 421 Locking claw

Claims (4)

複数の電池が積層されてなる電池積層体と、
上記電池積層体に熱的に接して上記電池積層体を温調する温調部材と、
上記温調部材を支持する複数の支持部材と、
を備え、
上記温調部材は、上記電池の積層方向に延在するとともに、複数の上記支持部材に亘って支持されており、
上記複数の支持部材は互いに異なる上記電池に接続されており、上記支持部材はそれぞれ、上記支持部材が接続された上記電池に上記温調部材を押圧している、電池システム。 A battery laminate made up of multiple batteries stacked together,
A temperature control member that thermally contacts the battery laminate to control the temperature of the battery laminate,
A plurality of support members that support the temperature control member, and
Equipped with
The temperature control member extends in the stacking direction of the battery and is supported by the plurality of support members.
A battery system in which the plurality of support members are connected to different batteries, and each of the support members presses the temperature control member against the battery to which the support member is connected. 上記支持部材は、上記電池の側面又は隣り合う他の電池に対向する上記電池の背面に接して上記電池に接続される電池接続部と、上記電池の下面に対向する位置において凹状に形成されて上記温調部材が配置される支持凹部と、を有する、請求項１に記載の電池システム。 The support member is formed in a concave shape at a position facing the lower surface of the battery and the battery connection portion connected to the battery in contact with the side surface of the battery or the back surface of the battery facing the other adjacent battery. The battery system according to claim 1, further comprising a support recess in which the temperature control member is arranged. 上記支持部材は、上記電池の側面又は隣り合う他の電池に対向する上記電池の背面に接続される電池接続部と、上記電池の下面に対向する位置において上記電池と反対側に突出して上記温調部材を幅方向に挟み込んで係止する複数の係止爪とを有する、請求項１に記載の電池システム。 The support member projects to the side opposite to the battery at a position facing the lower surface of the battery and the battery connection portion connected to the side surface of the battery or the back surface of the battery facing the other adjacent battery, and the temperature thereof. The battery system according to claim 1, further comprising a plurality of locking claws that sandwich and lock the adjusting member in the width direction. 上記支持部材は、上記複数の電池の半数以上に設けられている、請求項１～３のいずれか一項に記載の電池システム。 The battery system according to any one of claims 1 to 3, wherein the support member is provided in more than half of the plurality of batteries.
JP2020139743A 2020-08-21 2020-08-21 Battery system Pending JP2022035425A (en)

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JP2013012441A (en) * 2011-06-30 2013-01-17 Sanyo Electric Co Ltd Electric power source device and vehicle including the same
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