JP6612893B2 - Assembled battery - Google Patents

Assembled battery Download PDF

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JP6612893B2
JP6612893B2 JP2017554974A JP2017554974A JP6612893B2 JP 6612893 B2 JP6612893 B2 JP 6612893B2 JP 2017554974 A JP2017554974 A JP 2017554974A JP 2017554974 A JP2017554974 A JP 2017554974A JP 6612893 B2 JP6612893 B2 JP 6612893B2
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battery
short
circuit member
secondary battery
external terminal
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JPWO2017098838A1 (en
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明徳 多田
孝 佐々木
克利 栗原
佳士 飯塚
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Description

本発明は、複数の角形二次電池を備えた組電池に関する。   The present invention relates to an assembled battery including a plurality of prismatic secondary batteries.

従来から、例えば電気自動車やハイブリッド電気自動車の電源として、リチウムイオンバッテリー等の二次電池が使用されている。このような車載用の二次電池は、複数の二次電池を接続した組電池を１つの筐体に収容した二次電池モジュールとして用いられるが、衝撃や落下等による外力が加わると、二次電池に内部短絡が発生して内部の圧力や温度が過度に上昇する虞がある。このような問題に対処するために、短絡部材を設置して連結部材の短絡を誘導し、それによって過電流を発生させて、異常のある電池の充電と放電を中断させる技術が開示されている（下記特許文献１を参照）。   Conventionally, a secondary battery such as a lithium ion battery has been used as a power source for an electric vehicle or a hybrid electric vehicle. Such an in-vehicle secondary battery is used as a secondary battery module in which an assembled battery in which a plurality of secondary batteries are connected is housed in one housing. When an external force such as an impact or a drop is applied, the secondary battery is used. There is a possibility that an internal short circuit occurs in the battery and the internal pressure and temperature rise excessively. In order to cope with such a problem, a technique is disclosed in which a short-circuit member is installed to induce a short-circuit of the connecting member, thereby generating an overcurrent, thereby interrupting charging and discharging of an abnormal battery. (See Patent Document 1 below).

特許文献１に記載された二次電池モジュールは、以下の各構成を含んでいる。ケースの外側に露出された端子を含む複数個の二次電池。隣接する前記二次電池の前記端子を電気的に連結し、過電流が発生するとその連結を遮断するヒューズ部を有する第１連結部材。前記隣接する二次電池の端子のうちの第１連結部材が設置されていない端子を電気的に連結する第２連結部材。そして、前記第２連結部材の間の連結を制御して短絡を誘発する短絡部材である。この構成により、特許文献１では、上記のように過電流を発生させて、異常のある電池の充電と放電を中断させることによって安全性が向上する効果が得られる、としている（特許文献１、段落０００９、００２２等を参照）。   The secondary battery module described in Patent Document 1 includes the following components. A plurality of secondary batteries including terminals exposed to the outside of the case. A first connection member having a fuse portion that electrically connects the terminals of the adjacent secondary batteries and interrupts the connection when an overcurrent is generated. The 2nd connection member which electrically connects the terminal in which the 1st connection member is not installed among the terminals of the said adjacent secondary battery. And it is a short circuit member which induces a short circuit by controlling the connection between the second connection members. According to this configuration, Patent Document 1 describes that an effect of improving safety can be obtained by generating overcurrent as described above and interrupting charging and discharging of an abnormal battery (Patent Document 1, (See paragraphs 0009, 0022, etc.).

特開２０１１−４０３６８号公報JP2011-40368A

特許文献１に記載された電池モジュールでは、二次電池の内圧が上昇し、二次電池が膨張することで短絡回路が形成される。しかし、二次電池の内部短絡によって内圧が上昇する場合には、短時間で熱暴走状態に至る虞がある。また、ガス排出弁が開放されて二次電池の内圧が低下すると、膨張した二次電池が元に戻り、短絡回路が形成されない虞がある。   In the battery module described in Patent Document 1, the internal pressure of the secondary battery rises and the secondary battery expands to form a short circuit. However, when the internal pressure increases due to an internal short circuit of the secondary battery, there is a possibility that a thermal runaway state may be reached in a short time. Further, when the gas discharge valve is opened and the internal pressure of the secondary battery decreases, the expanded secondary battery returns to its original state, and there is a possibility that a short circuit is not formed.

本発明は、前記課題に鑑みてなされたものであり、衝撃等による外力に対する二次電池の安全性を従来よりも向上させることができる組電池を提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide an assembled battery that can improve the safety of a secondary battery against an external force due to an impact or the like as compared with the conventional battery.

前記目的を達成すべく、本発明の組電池は、厚さ方向に積層された扁平角形の複数の二次電池を備え、積層方向に隣り合う一方の二次電池の正極外部端子と他方の二次電池の負極外部端子が接続された組電池であって、導電性を有する短絡部材を備え、前記短絡部材は、前記一方の二次電池の負極外部端子を含む負極側低電位部と、前記他方の二次電池の正極外部端子を含む正極側高電位部とに対向するとともに、前記負極側低電位部と前記正極側高電位部の少なくとも一方との間に間隙を有する。   In order to achieve the above object, the assembled battery of the present invention includes a plurality of flat rectangular secondary batteries stacked in the thickness direction, and the positive external terminal and the other two secondary batteries adjacent in the stacking direction. An assembled battery to which a negative electrode external terminal of a secondary battery is connected, comprising a short-circuit member having conductivity, the short-circuit member including a negative electrode-side low potential portion including a negative electrode external terminal of the one secondary battery, While facing the positive electrode side high potential part including the positive electrode external terminal of the other secondary battery, there is a gap between at least one of the negative electrode side low potential part and the positive electrode side high potential part.

本発明によれば、衝撃等による外力に対する二次電池の安全性を従来よりも向上させることができる組電池を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the assembled battery which can improve the safety | security of the secondary battery with respect to the external force by an impact etc. than before can be provided.

本発明の実施形態１に係る組電池の模式的な外観斜視図。1 is a schematic external perspective view of an assembled battery according to Embodiment 1 of the present invention. FIG. 図１に示す２つのセルホルダによって保持された二次電池を示す斜視図。The perspective view which shows the secondary battery hold | maintained by the two cell holders shown in FIG. 図２に示すセルホルダと二次電池の分解斜視図。The disassembled perspective view of the cell holder and secondary battery shown in FIG. 図１に示す２つの二次電池の間のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member between the two secondary batteries shown in FIG. 図４Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and short circuit member which follow the BB line shown to FIG. 4A. 図４Ａに示す組電池の変形後のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member after a deformation | transformation of the assembled battery shown to FIG. 4A. 図５Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and short circuit member which follow the BB line shown to FIG. 5A. 本発明の実施形態２に係る組電池のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member of the assembled battery which concern on Embodiment 2 of this invention. 図６Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and short circuit member which follow the BB line shown to FIG. 6A. 図６Ａに示す組電池の変形後のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member after a deformation | transformation of the assembled battery shown to FIG. 6A. 図７Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and short circuit member which follow the BB line shown to FIG. 7A. 本発明の実施形態３に係る組電池のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member of the assembled battery which concern on Embodiment 3 of this invention. 図８Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and short circuit member which follow the BB line shown to FIG. 8A. 図８Ｂに示す組電池の変形後のセルホルダ及び短絡部材の断面図。Sectional drawing of the cell holder and the short circuit member after a deformation | transformation of the assembled battery shown to FIG. 8B. 本発明の実施形態４に係る組電池のセルホルダ及び短絡部材を示す平面図。The top view which shows the cell holder and short circuit member of the assembled battery which concern on Embodiment 4 of this invention. 本発明の実施形態５に係る組電池のセルホルダ及び短絡部材を示す断面図。Sectional drawing which shows the cell holder and short circuit member of an assembled battery which concern on Embodiment 5 of this invention. 本発明の実施形態６に係る組電池のセルホルダ及び短絡部材を示す斜視図。The perspective view which shows the cell holder and short circuit member of the assembled battery which concern on Embodiment 6 of this invention. 本発明の実施形態７に係る組電池のセルホルダ及び短絡部材を示す斜視図。The perspective view which shows the cell holder and short circuit member of an assembled battery which concern on Embodiment 7 of this invention.

以下、図面を参照して本発明の組電池の実施形態を説明する。   Hereinafter, embodiments of the assembled battery of the present invention will be described with reference to the drawings.

以下の各図面では、各部の縮尺を適宜変更する場合がある。また、以下の説明における上下左右は、各部材の位置関係を説明する便宜的な方向であり、必ずしも鉛直方向や水平方向に対応するものではない。   In the following drawings, the scale of each part may be changed as appropriate. In the following description, up, down, left, and right are convenient directions for explaining the positional relationship between the members, and do not necessarily correspond to the vertical direction or the horizontal direction.

［実施形態１］
図１は、本発明の実施形態に係る組電池１００の模式的な外観斜視図である。[Embodiment 1]
FIG. 1 is a schematic external perspective view of a battery pack 100 according to an embodiment of the present invention.

本実施形態の組電池１００は、厚さ方向に積層された扁平角形の複数の二次電池１０を備えている。複数の二次電池１０は、積層方向に隣り合う一方の二次電池１０の正極外部端子１６Ｐと他方の二次電池１０の負極外部端子１６Ｎとが接続されて直列に接続されている。詳細は後述するが、本実施形態の組電池１００は、衝撃等による外力が作用したときに、積層方向に隣り合う一方の二次電池１０の負極側低電位部１０Ｌと、他方の二次電池１０の正極側高電位部１０Ｈとを短絡させる短絡部材４０を備えることを特徴としている。以下では、負極側低電位部１０Ｌを単に低電位部１０Ｌと表記し、正極側高電位部１０Ｈを単に高電位部１０Ｈと表記する。   The assembled battery 100 of this embodiment includes a plurality of flat rectangular secondary batteries 10 stacked in the thickness direction. In the plurality of secondary batteries 10, the positive external terminal 16 </ b> P of one secondary battery 10 adjacent in the stacking direction and the negative external terminal 16 </ b> N of the other secondary battery 10 are connected and connected in series. Although details will be described later, the assembled battery 100 according to the present embodiment includes the negative electrode side low potential portion 10L of one secondary battery 10 adjacent in the stacking direction and the other secondary battery when an external force due to impact or the like is applied. The short circuit member 40 which short-circuits the 10 positive electrode side high electric potential part 10H is provided. Hereinafter, the negative electrode side low potential portion 10L is simply expressed as a low potential portion 10L, and the positive electrode side high potential portion 10H is simply expressed as a high potential portion 10H.

本実施形態の組電池１００は、複数の二次電池１０と、個々の二次電池１０を保持するセルホルダ２０と、複数の二次電池１０を直列に接続する複数のバスバー３０と、導電性を有する短絡部材４０と、を備えている。短絡部材４０の素材としては、例えば、二次電池１０の正極外部端子１６Ｐ又は負極外部端子１６Ｎと同様の導電性を有する金属材料を用いることができる。   The assembled battery 100 of the present embodiment includes a plurality of secondary batteries 10, a cell holder 20 that holds the individual secondary batteries 10, a plurality of bus bars 30 that connect the plurality of secondary batteries 10 in series, and conductivity. A short-circuit member 40. As a material of the short-circuit member 40, for example, a metal material having the same conductivity as that of the positive electrode external terminal 16P or the negative electrode external terminal 16N of the secondary battery 10 can be used.

短絡部材４０は、積層方向に隣り合う一方の二次電池１０の負極外部端子１６Ｎを含む低電位部１０Ｌと、他方の二次電池１０の正極外部端子１６Ｐを含む高電位部１０Ｈとに対向する。また、短絡部材４０は、低電位部１０Ｌと高電位部１０Ｈの少なくとも一方との間に間隙を有する。本実施形態の組電池１００において、短絡部材４０は、対向する低電位部１０Ｌと高電位部１０Ｈの双方との間に間隔を有している。   The short-circuit member 40 faces the low potential portion 10L including the negative external terminal 16N of one secondary battery 10 adjacent in the stacking direction and the high potential portion 10H including the positive external terminal 16P of the other secondary battery 10. . Further, the short-circuit member 40 has a gap between at least one of the low potential portion 10L and the high potential portion 10H. In the assembled battery 100 of the present embodiment, the short-circuit member 40 has an interval between both the low potential portion 10L and the high potential portion 10H that face each other.

複数のバスバー３０は、積層方向に隣り合う一方の二次電池１０の正極外部端子１６Ｐと、他方の二次電池１０の負極外部端子１６Ｎとを順次接続している。本実施形態の組電池１００おいて、上記一方の二次電池１０の低電位部１０Ｌは、当該二次電池１０の負極外部端子１６Ｎと、当該負極外部端子１６Ｎに接続されたバスバー３０とを含む。さらに、上記他方の二次電池１０の高電位部１０Ｈは、当該二次電池１０の正極外部端子１６Ｐと、当該正極外部端子１６Ｐに接続されたバスバー３０とを含む。   The plurality of bus bars 30 sequentially connect the positive external terminal 16P of one secondary battery 10 adjacent in the stacking direction and the negative external terminal 16N of the other secondary battery 10. In the assembled battery 100 of the present embodiment, the low potential portion 10L of the one secondary battery 10 includes a negative electrode external terminal 16N of the secondary battery 10 and a bus bar 30 connected to the negative electrode external terminal 16N. . Further, the high potential portion 10H of the other secondary battery 10 includes a positive external terminal 16P of the secondary battery 10 and a bus bar 30 connected to the positive external terminal 16P.

図２は、組電池１００を構成する二次電池１０を一対のセルホルダ２０によって保持した状態を示す斜視図である。図３は、図２に示す二次電池１０とセルホルダ２０の分解斜視図である。   FIG. 2 is a perspective view showing a state in which the secondary battery 10 constituting the assembled battery 100 is held by a pair of cell holders 20. FIG. 3 is an exploded perspective view of the secondary battery 10 and the cell holder 20 shown in FIG.

組電池１００を構成する個々の二次電池１０は、扁平角形の電池容器１１を備えた角形二次電池である。電池容器１１の材質は、例えば、アルミニウム又はアルミニウム合金等である。電池容器１１は、有底角筒状の電池缶１２と、電池缶１２の上部の開口部を封止する矩形板状の電池蓋１３とによって構成されている。電池缶１２は、例えば、板材を深絞り加工することによって、上部に開口部を有する扁平な矩形箱型に形成されている。電池蓋１３は、例えば、鍛造等によって長方形の平板状に形成され、例えば、レーザ溶接によって電池缶１２の上部に接合され、電池缶１２の開口部を封止している。   Each secondary battery 10 constituting the assembled battery 100 is a rectangular secondary battery including a flat rectangular battery container 11. The material of the battery container 11 is, for example, aluminum or an aluminum alloy. The battery container 11 includes a bottomed rectangular tube-shaped battery can 12 and a rectangular plate-shaped battery lid 13 that seals the opening at the top of the battery can 12. The battery can 12 is formed into a flat rectangular box shape having an opening in the upper part, for example, by deep drawing a plate material. The battery lid 13 is formed into a rectangular flat plate shape by forging or the like, for example, and is joined to the upper portion of the battery can 12 by, for example, laser welding to seal the opening of the battery can 12.

電池容器１１は、幅と高さに対して厚さが小さい扁平角形の形状を有することで、厚さ方向の両側に比較的面積の大きい広側面１１ｗを有し、幅方向両側に比較的面積の小さい狭側面１１ｎを有し、上下に幅方向を長手方向とする長方形の底面１１ｂ及び上面１１ｔを有している。なお、各図において、電池容器１１の厚さ方向をＸ軸方向、幅方向をＹ軸方向、高さ方向をＺ軸方向とするＸＹＺ直交座標系を示している。   The battery container 11 has a flat rectangular shape with a small thickness with respect to the width and height, thereby having wide side surfaces 11w having relatively large areas on both sides in the thickness direction and relatively large areas on both sides in the width direction. A narrow bottom surface 11n and a rectangular bottom surface 11b and top surface 11t with the width direction as the longitudinal direction. In each figure, an XYZ orthogonal coordinate system is shown in which the thickness direction of the battery case 11 is the X-axis direction, the width direction is the Y-axis direction, and the height direction is the Z-axis direction.

電池容器１１の内部には、図示を省略する電極群が収容されている。電極群は、例えば、長尺帯状の正極電極及び負極電極の間に長尺帯状のセパレータを介在させて捲回した扁平な捲回電極群である。電極群を構成する正極電極は、幅方向の一端の箔露出部が束ねられて電池容器１１の内部に収容された図示を省略する正極集電板に接合されることで、正極集電板を介して正極外部端子１６Ｐに接続されている。電極群を構成する負極電極は、幅方向の一端の箔露出部が正極電極の箔露出部と電極群の捲回軸方向の反対側で束ねられ、電池容器１１の内部に収容された図示を省略する負極集電板に接合されることで、負極集電板を介して負極外部端子１６Ｎに接続されている。   An electrode group (not shown) is accommodated inside the battery container 11. The electrode group is, for example, a flat wound electrode group that is wound with a long strip-shaped separator interposed between a long strip-shaped positive electrode and a negative electrode. The positive electrode constituting the electrode group is bonded to a positive current collector plate (not shown) in which the foil exposed portion at one end in the width direction is bundled and accommodated inside the battery container 11. To the positive external terminal 16P. In the negative electrode constituting the electrode group, the foil exposed portion at one end in the width direction is bundled on the opposite side of the electrode group in the winding axis direction from the foil exposed portion of the positive electrode, and is shown inside the battery container 11. By being joined to the negative current collector plate that is omitted, the negative electrode current collector plate is connected to the negative electrode external terminal 16N.

正極外部端子１６Ｐ及び負極外部端子１６Ｎは、電池容器１１の外面に配置され、それぞれ正極集電板及び負極集電板を介して電極群の正極電極及び負極電極に接続されている。正極外部端子１６Ｐは、電池容器１１を構成する電池蓋１３の上面１１ｔの長手方向の一端に配置され、負極外部端子１６Ｎは、電池蓋１３の上面１１ｔの長手方向の他端に配置されている。正極外部端子１６Ｐ及び負極外部端子１６Ｎは、電池蓋１３を貫通する不図示の接続部が電池容器１１の内部の正極集電板及び負極集電板基部を貫通し、接続部の先端が塑性変形させられて、かしめ部が設けられている。   The positive external terminal 16P and the negative external terminal 16N are disposed on the outer surface of the battery container 11, and are connected to the positive electrode and the negative electrode of the electrode group via the positive current collector and the negative current collector, respectively. The positive external terminal 16P is arranged at one end in the longitudinal direction of the upper surface 11t of the battery lid 13 constituting the battery container 11, and the negative external terminal 16N is arranged at the other end in the longitudinal direction of the upper surface 11t of the battery lid 13. . In the positive external terminal 16P and the negative external terminal 16N, a connection portion (not shown) that penetrates the battery lid 13 penetrates the positive current collector plate and the negative current collector base in the battery container 11, and the tip of the connection portion is plastically deformed. A caulking portion is provided.

これにより、正極外部端子１６Ｐ及び負極外部端子１６Ｎは、図示を省略する電池容器１１内部の絶縁部材を介在させて電池蓋１３に正極集電板及び負極集電板をかしめ固定し、それぞれ正極集電板及び負極集電板に対して電気的に接続されている。また、正極外部端子１６Ｐ及び負極外部端子１６Ｎは、電池蓋１３との間に絶縁性を有する樹脂材料を素材とするガスケット１７を介在させることで、電池蓋１３に対して電気的に絶縁されている。   Thus, the positive electrode external terminal 16P and the negative electrode external terminal 16N are fixed by crimping the positive electrode current collector plate and the negative electrode current collector plate to the battery lid 13 with an insulating member inside the battery container 11 (not shown) interposed therebetween, respectively. It is electrically connected to the electric plate and the negative electrode current collector plate. Moreover, the positive electrode external terminal 16P and the negative electrode external terminal 16N are electrically insulated from the battery cover 13 by interposing a gasket 17 made of an insulating resin material between the battery cover 13 and the positive electrode external terminal 16P. Yes.

電池蓋１３の上面１１ｔの正極外部端子１６Ｐと負極外部端子１６Ｎとの間には、ガス排出弁１８と注液口１９ａが設けられている。ガス排出弁１８は、例えば、電池蓋１３の一部を薄肉化してスリット状の溝を形成することによって形成され、電池容器１１の内部の圧力が所定値よりも上昇したときに開裂し、電池容器１１の内部のガスを排出することで、電池容器１１の内部の圧力を低下させる。注液口１９ａは、電池容器１１の内部に電解液を注入するために用いられ、電解液の注入後に、例えばレーザ溶接によって注液栓１９ｂが接合されて封止される。   Between the positive electrode external terminal 16P and the negative electrode external terminal 16N on the upper surface 11t of the battery lid 13, a gas discharge valve 18 and a liquid injection port 19a are provided. The gas discharge valve 18 is formed, for example, by thinning a part of the battery lid 13 to form a slit-like groove, and is cleaved when the internal pressure of the battery container 11 rises above a predetermined value. By discharging the gas inside the container 11, the pressure inside the battery container 11 is reduced. The liquid injection port 19a is used for injecting the electrolyte into the battery container 11, and after the injection of the electrolyte, the liquid injection plug 19b is joined and sealed, for example, by laser welding.

複数の二次電池１０は、互いの電池容器１１の広側面１１ｗが対向するように、厚さ方向に積層させて配置される。積層方向に隣接する二つの二次電池１０は、一方の二次電池１０の正極外部端子１６Ｐと、他方の二次電池１０の負極外部端子１６Ｎとが積層方向に隣り合うように、１８０°反転させて配置される。そして、一方の二次電池１０の正極外部端子１６Ｐに、例えば溶接によってバスバー３０の一端が接合され、他方の二次電池１０の負極外部端子１６Ｎに、例えば溶接によってバスバー３０の他端が接合されることで、複数の二次電池１０が直列に接続される。   The plurality of secondary batteries 10 are stacked in the thickness direction so that the wide side surfaces 11w of the battery containers 11 face each other. The two secondary batteries 10 adjacent to each other in the stacking direction are inverted by 180 ° so that the positive external terminal 16P of one secondary battery 10 and the negative external terminal 16N of the other secondary battery 10 are adjacent to each other in the stacking direction. Arranged. One end of the bus bar 30 is joined to the positive external terminal 16P of one secondary battery 10 by welding, for example, and the other end of the bus bar 30 is joined to the negative external terminal 16N of the other secondary battery 10 by welding, for example. Thus, the plurality of secondary batteries 10 are connected in series.

組電池１００は、複数の二次電池１０の配列の一端に配置された二次電池１０の正極外部端子１６Ｐと、他端に配置された二次電池１０の負極外部端子１６Ｎにも、それぞれバスバー３０が接続されている。これらのバスバー３０によって、例えば、組電池１００を他の組電池や外部機器に接続することができる。   The assembled battery 100 is also connected to the positive external terminal 16P of the secondary battery 10 disposed at one end of the array of the secondary batteries 10 and the negative external terminal 16N of the secondary battery 10 disposed at the other end, respectively. 30 is connected. With these bus bars 30, for example, the assembled battery 100 can be connected to another assembled battery or an external device.

正極外部端子１６Ｐ、正極集電板及び正極電極の金属箔の素材は、例えば、アルミニウム又はアルミニウム合金である。また、負極外部端子１６Ｎ、負極集電板及び負極電極の金属箔の素材は、例えば、銅又は銅合金である。バスバー３０の素材は、正極外部端子１６Ｐ又は負極外部端子１６Ｎと同様の素材、正極外部端子１６Ｐ及び負極外部端子１６Ｎに対する溶接性と導電性に優れた素材、或いはめっき層を有する金属製の板材等を適宜選択することができる。   The material of the metal foil of the positive electrode external terminal 16P, the positive electrode current collector plate, and the positive electrode is, for example, aluminum or an aluminum alloy. Moreover, the raw material of the metal foil of the negative electrode external terminal 16N, the negative electrode current collector plate, and the negative electrode is, for example, copper or a copper alloy. The material of the bus bar 30 is the same material as the positive electrode external terminal 16P or the negative electrode external terminal 16N, a material excellent in weldability and conductivity with respect to the positive electrode external terminal 16P and the negative electrode external terminal 16N, or a metal plate material having a plating layer, etc. Can be appropriately selected.

組電池１００を構成する個々の二次電池１０は、それぞれセルホルダ２０によって保持されている。セルホルダ２０は、複数の二次電池１０の積層方向の両端に配置される一対の端部セルホルダ２０Ａと、２つの隣接する二次電池１０の間に配置される複数の中間セルホルダ２０Ｂによって構成されている。セルホルダ２０の素材としては、例えば、ガラスエポキシ樹脂、ポリプロピレン、ポリブチレンテレフタレート樹脂などの樹脂材料や、アルミニウム、銅、ステンレスなどの金属材料を用いることができる。   Each secondary battery 10 constituting the assembled battery 100 is held by a cell holder 20. The cell holder 20 includes a pair of end cell holders 20A disposed at both ends in the stacking direction of the plurality of secondary batteries 10 and a plurality of intermediate cell holders 20B disposed between two adjacent secondary batteries 10. Yes. As a material of the cell holder 20, for example, a resin material such as glass epoxy resin, polypropylene, or polybutylene terephthalate resin, or a metal material such as aluminum, copper, or stainless steel can be used.

中間セルホルダ２０Ｂは、図２及び図３に示すように、二次電池１０の扁平角形の電池容器１１の広側面１１ｗに対向するスペーサ部２１と、電池容器１１の狭側面１１ｎに対向する側板部２２と、電池容器１１の底面１１ｂに対向する底板部２３とを有している。端部セルホルダ２０Ａは、中間セルホルダ２０Ｂにおいて、スペーサ部２１を中心に電池容器１１の厚さ方向の両側に延びる側板部２２及び底板部２３の片側を、スペーサ部２１に沿う平面で切断した構成を有している。そのため、以下では、セルホルダ２０の構成として中間セルホルダ２０Ｂの構成を中心に説明し、端部セルホルダ２０Ａの説明を適宜省略する。   As shown in FIGS. 2 and 3, the intermediate cell holder 20 </ b> B includes a spacer portion 21 that faces the wide side surface 11 w of the flat rectangular battery case 11 of the secondary battery 10 and a side plate portion that faces the narrow side surface 11 n of the battery case 11. 22 and a bottom plate portion 23 that faces the bottom surface 11 b of the battery container 11. The end cell holder 20A has a configuration in which one side of the side plate portion 22 and the bottom plate portion 23 extending on both sides in the thickness direction of the battery container 11 is cut along a plane along the spacer portion 21 in the intermediate cell holder 20B. Have. Therefore, below, it demonstrates centering around the structure of the intermediate | middle cell holder 20B as a structure of the cell holder 20, and abbreviate | omits description of the edge part cell holder 20A suitably.

セルホルダ２０は、前述のように、電池容器１１の広側面１１ｗに対向するスペーサ部２１と、電池容器１１の狭側面１１ｎに対向する側板部２２と、電池容器１１の底面１１ｂに対向する底板部２３とを有している。電池容器１１の幅方向に間隔を有して対向する一対の長方形の板状の側板部２２と、電池容器１１の幅方向に延在して一対の側板部２２を連結する長方形板状の底板部２３とによって、上部が開放されたＵ字状の保持部２４が形成されている。   As described above, the cell holder 20 includes the spacer portion 21 that faces the wide side surface 11w of the battery container 11, the side plate portion 22 that faces the narrow side surface 11n of the battery container 11, and the bottom plate portion that faces the bottom surface 11b of the battery container 11. 23. A pair of rectangular plate-like side plate portions 22 facing each other with a gap in the width direction of the battery case 11, and a rectangular plate-like bottom plate extending in the width direction of the battery case 11 and connecting the pair of side plate portions 22. The portion 23 forms a U-shaped holding portion 24 whose upper portion is open.

セルホルダ２０の保持部２４は、電池容器１１の上面１１ｔを露出させた状態で、電池容器１１の厚さの約半分を収容する。対向する一対のセルホルダ２０の保持部２４に、二次電池１０の電池容器１１の厚さの約半分ずつを収容することで、二次電池１０は、電池容器１１の上面１１ｔを露出させた状態で、一対のセルホルダ２０の間に保持される。   The holding part 24 of the cell holder 20 accommodates about half of the thickness of the battery container 11 with the upper surface 11t of the battery container 11 exposed. The secondary battery 10 is in a state where the upper surface 11t of the battery container 11 is exposed by accommodating approximately half of the thickness of the battery container 11 of the secondary battery 10 in the holding portions 24 of the pair of cell holders 20 facing each other. Thus, it is held between the pair of cell holders 20.

複数のスペーサ部２１の間には、電池容器１１の幅方向に延びる複数のスリット２５が形成されている。また、側板部２２には、各スリット２５に連通する複数の開口部２６が形成されている。セルホルダ２０は、二次電池１０の電池容器１１の広側面１１ｗを冷却する冷却空気等の冷媒を、一方の側板部２２の開口部２６から導入してスリット２５に流通させ、他方の側板部２２の開口部２６から導出することができるように構成されている。   A plurality of slits 25 extending in the width direction of the battery container 11 are formed between the plurality of spacer portions 21. Further, the side plate portion 22 is formed with a plurality of openings 26 communicating with the respective slits 25. The cell holder 20 introduces a coolant such as cooling air that cools the wide side surface 11 w of the battery container 11 of the secondary battery 10 from the opening 26 of one side plate portion 22, distributes it through the slit 25, and the other side plate portion 22. It is comprised so that it can derive | lead-out from the opening part 26 of this.

図示は省略するが、複数の二次電池１０の積層方向の両端に配置された一対の端部セルホルダ２０Ａの外側の平坦な面に対向して一対のエンドプレートが配置される。また、二次電池１０の幅方向の両側に、複数のセルホルダ２０の側板部２２に対向して二次電池１０の積層方向に延在する一対のサイドプレートが配置され、一対のサイドプレートの延在方向の両端が一対のエンドプレートに締結される。これにより、一対のエンドプレートの間隔が規定され、セルホルダ２０の間に配置された複数の二次電池１０は、電池容器１１の広側面１１ｗにセルホルダ２０のスペーサ部２１が当接し、圧縮力が付与された状態で、セルホルダ２０によって保持される。   Although illustration is omitted, a pair of end plates are disposed opposite to the flat surfaces outside the pair of end cell holders 20A disposed at both ends in the stacking direction of the plurality of secondary batteries 10. In addition, a pair of side plates extending in the stacking direction of the secondary batteries 10 are arranged on both sides of the secondary battery 10 in the width direction so as to face the side plate portions 22 of the plurality of cell holders 20. Both ends in the present direction are fastened to the pair of end plates. Thereby, the space | interval of a pair of end plate is prescribed | regulated, and the spacer part 21 of the cell holder 20 contact | abuts the wide side surface 11w of the battery container 11, and the some secondary battery 10 arrange | positioned between the cell holders 20 has compression force. In the applied state, it is held by the cell holder 20.

図４Ａは、図１に示す組電池１００の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０を示す平面図である。図４Ｂは、図４Ａに示すＢ−Ｂ線に沿うセルホルダ２０及び短絡部材４０の断面図である。   4A is a plan view showing the cell holder 20 and the short-circuit member 40 between the two secondary batteries 10 of the assembled battery 100 shown in FIG. 4B is a cross-sectional view of the cell holder 20 and the short-circuit member 40 along the line BB shown in FIG. 4A.

前述のように、本実施形態の組電池１００は、厚さ方向に積層された扁平角形の複数の二次電池１０を備えている。複数の二次電池１０の積層方向に隣り合う任意の二つの二次電池１０は、一方の二次電池１０の正極外部端子１６Ｐと他方の二次電池１０の負極外部端子１６Ｎとがバスバー３０によって順次接続されて直列に接続されている。組電池１００は、導電性を有する短絡部材４０を備えることを特徴としている。   As described above, the assembled battery 100 of this embodiment includes the plurality of flat rectangular secondary batteries 10 stacked in the thickness direction. Arbitrary two secondary batteries 10 adjacent to each other in the stacking direction of the plurality of secondary batteries 10 include a positive external terminal 16P of one secondary battery 10 and a negative external terminal 16N of the other secondary battery 10 by a bus bar 30. They are sequentially connected and connected in series. The assembled battery 100 includes a short-circuit member 40 having conductivity.

短絡部材４０は、積層方向に隣り合う二つの二次電池１０のうち、一方の二次電池１０の負極外部端子１６Ｎを含む低電位部１０Ｌと、他方の二次電池１０の正極外部端子１６Ｐを含む高電位部１０Ｈとに対向している。また、短絡部材４０は、これら低電位部１０Ｌと高電位部１０Ｈの少なくとも一方との間に間隙を有する。なお、本実施形態の組電池１００において、短絡部材４０は、対向する低電位部１０Ｌと高電位部１０Ｈの双方との間に間隔を有している。   Of the two secondary batteries 10 adjacent to each other in the stacking direction, the short-circuit member 40 includes the low potential portion 10L including the negative external terminal 16N of one secondary battery 10 and the positive external terminal 16P of the other secondary battery 10. It is opposed to the high potential portion 10H that contains it. Further, the short-circuit member 40 has a gap between at least one of the low potential portion 10L and the high potential portion 10H. In the assembled battery 100 of the present embodiment, the short-circuit member 40 has an interval between both the low potential portion 10L and the high potential portion 10H facing each other.

また、前述のように、本実施形態の組電池１００において、上記一方の二次電池１０の低電位部１０Ｌは、当該二次電池１０の負極外部端子１６Ｎとそれに接続されたバスバー３０とを含む。さらに、上記他方の二次電池１０の高電位部１０Ｈは、当該二次電池１０の正極外部端子１６Ｐとそれに接続されたバスバー３０とを含む。   Further, as described above, in the assembled battery 100 of the present embodiment, the low potential portion 10L of the one secondary battery 10 includes the negative external terminal 16N of the secondary battery 10 and the bus bar 30 connected thereto. . Further, the high potential portion 10H of the other secondary battery 10 includes a positive external terminal 16P of the secondary battery 10 and a bus bar 30 connected thereto.

短絡部材４０は、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとの間の空間に沿って、二次電池１０の電池容器１１の幅方向を長手方向とする長方形の板状又は直方体の柱状に形成されている。電池容器１１の厚さ方向における短絡部材４０の上端部の寸法は、下端部の寸法よりも大きくされ、電池容器１１の厚さ方向の両側面において上端部と下端部との間に段差が形成されている。   The short-circuit member 40 has a longitudinal direction in the width direction of the battery container 11 of the secondary battery 10 along the space between the low potential part 10L and the high potential part 10H of the two secondary batteries 10 adjacent in the stacking direction. It is formed in a rectangular plate shape or a rectangular parallelepiped column shape. The size of the upper end portion of the short-circuit member 40 in the thickness direction of the battery case 11 is made larger than the size of the lower end portion, and a step is formed between the upper end portion and the lower end portion on both side surfaces in the thickness direction of the battery case 11. Has been.

短絡部材４０の上端部と、低電位部１０Ｌ及び高電位部１０Ｈとの間隔は、後述するように、組電池１００に作用する荷重に応じて設定されている。短絡部材４０の下端部は、セルホルダ２０のスペーサ部２１に固定されている。なお、短絡部材４０の形状は、特に限定されず、矩形の平板状又は柱状の形状以外に、例えば、菱形、円形、楕円形等、任意の形状を選択することができる。   The intervals between the upper end portion of the short-circuit member 40 and the low potential portion 10L and the high potential portion 10H are set according to the load acting on the assembled battery 100, as will be described later. The lower end portion of the short-circuit member 40 is fixed to the spacer portion 21 of the cell holder 20. In addition, the shape of the short circuit member 40 is not specifically limited, Arbitrary shapes, such as a rhombus, a circle | round | yen, an ellipse, can be selected other than rectangular flat plate shape or columnar shape.

なお、組電池１００の複数の二次電池１０のうち、短絡部材４０を介して積層方向に隣り合う任意の二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈは、これら二つの二次電池１０の相対的な電位の高低によって決定される。したがって、複数の二次電池１０のうち、低電位側に配置された二つの二次電池１０において高電位部１０Ｈであったバスバー３０は、その二つの二次電池１０の高電位側に配置された二つの二次電池１０においては、低電位部１０Ｌとなる。   Of the plurality of secondary batteries 10 of the assembled battery 100, the low potential part 10 </ b> L and the high potential part 10 </ b> H of any two secondary batteries 10 adjacent in the stacking direction via the short-circuit member 40 are the two secondary batteries 10. It is determined by the relative potential level of the secondary battery 10. Therefore, the bus bar 30 that is the high potential portion 10H in the two secondary batteries 10 arranged on the low potential side among the plurality of secondary batteries 10 is arranged on the high potential side of the two secondary batteries 10. In the two secondary batteries 10, the low potential portion 10 </ b> L is obtained.

より詳細には、本実施形態の組電池１００において、複数の扁平角形の二次電池１０は、各二次電池１０の正極外部端子１６Ｐと負極外部端子１６Ｎの幅方向の位置を交互に反転させて厚さ方向に積層されている。これにより、積層方向に隣り合う任意の二つの二次電池１０において、一方の二次電池１０の正極外部端子１６Ｐと、他方の二次電池１０の負極外部端子１６Ｎとが、積層方向に対向している。   More specifically, in the assembled battery 100 of the present embodiment, the plurality of flat rectangular secondary batteries 10 alternately invert the positions in the width direction of the positive external terminals 16P and the negative external terminals 16N of the secondary batteries 10. Are stacked in the thickness direction. Accordingly, in any two secondary batteries 10 adjacent in the stacking direction, the positive external terminal 16P of one secondary battery 10 and the negative external terminal 16N of the other secondary battery 10 face each other in the stacking direction. ing.

そして、積層方向の一端に配置された二次電池１０の正極外部端子１６Ｐが、その二次電池１０に隣り合う二次電池１０の負極外部端子１６Ｎにバスバー３０を介して接続される。また、積層方向の一端に配置された二次電池１０に隣り合う二次電池１０の正極外部端子１６Ｐが、さらにその二次電池１０に隣り合う二次電池１０の負極外部端子１６Ｎにバスバー３０を介して接続される。これを積層方向の他端に配置された二次電池１０まで繰り返すことで、複数の二次電池１０が直列に接続されている。   Then, the positive external terminal 16P of the secondary battery 10 arranged at one end in the stacking direction is connected to the negative external terminal 16N of the secondary battery 10 adjacent to the secondary battery 10 via the bus bar 30. Further, the positive electrode external terminal 16P of the secondary battery 10 adjacent to the secondary battery 10 arranged at one end in the stacking direction is further connected to the negative electrode external terminal 16N of the secondary battery 10 adjacent to the secondary battery 10 with the bus bar 30. Connected through. By repeating this up to the secondary battery 10 disposed at the other end in the stacking direction, the plurality of secondary batteries 10 are connected in series.

このように、複数の二次電池１０が厚さ方向に積層されて直列に接続された組電池１００では、積層方向に隣り合う任意の二つの二次電池１０のうち、一方の二次電池１０の正極外部端子１６Ｐと、他方の二次電池１０の負極外部端子１６Ｎとが接続されている。この場合、当該一方の二次電池１０の負極外部端子１６Ｎは、低電位部１０Ｌであり、当該他方の二次電池１０の正極外部端子１６Ｐは、高電位部１０Ｈである。   As described above, in the assembled battery 100 in which the plurality of secondary batteries 10 are stacked in the thickness direction and connected in series, one of the two secondary batteries 10 adjacent in the stacking direction is one of the secondary batteries 10. The positive external terminal 16P of the other and the negative external terminal 16N of the other secondary battery 10 are connected. In this case, the negative external terminal 16N of the one secondary battery 10 is the low potential portion 10L, and the positive external terminal 16P of the other secondary battery 10 is the high potential portion 10H.

換言すると、上記のように、複数の二次電池１０が厚さ方向に積層されて直列に接続された組電池１００では、積層方向に隣り合う任意の二つの二次電池１０の間に、短絡部材４０が配置されている。この場合、短絡部材４０に対向する高電位側の二次電池１０の正極外部端子１６Ｐ及びそれに接続されたバスバー３０が高電位部１０Ｈとなり、短絡部材４０に対向する低電位側の二次電池１０の負極外部端子１６Ｎ及びそれに接続されたバスバー３０が低電位部１０Ｌとなる。   In other words, as described above, in the assembled battery 100 in which the plurality of secondary batteries 10 are stacked in the thickness direction and connected in series, a short circuit occurs between any two secondary batteries 10 adjacent in the stacking direction. A member 40 is arranged. In this case, the positive external terminal 16P of the high-potential side secondary battery 10 facing the short-circuit member 40 and the bus bar 30 connected thereto become the high-potential portion 10H, and the low-potential-side secondary battery 10 facing the short-circuit member 40. The negative external terminal 16N and the bus bar 30 connected thereto become the low potential portion 10L.

短絡部材４０と、低電位部１０Ｌ及び高電位部１０Ｈとの間の間隔は、組電池１００に衝撃等による外力が作用したときに、短絡部材４０が低電位部１０Ｌ及び高電位部１０Ｈに接触する間隔に設定することができる。具体的には、例えば、組電池１００に衝撃が加わったときに想定される荷重による組電池１００の変形量を算出し、その変形量に応じて短絡部材４０と、低電位部１０Ｌ及び高電位部１０Ｈとの間隔を設定することができる。   The distance between the short-circuit member 40 and the low-potential portion 10L and the high-potential portion 10H is such that the short-circuit member 40 contacts the low-potential portion 10L and the high-potential portion 10H when an external force such as an impact acts on the assembled battery 100. The interval can be set. Specifically, for example, the deformation amount of the assembled battery 100 due to a load assumed when an impact is applied to the assembled battery 100 is calculated, and the short-circuit member 40, the low potential portion 10L, and the high potential are calculated according to the deformation amount. The interval with the part 10H can be set.

例えば、組電池１００に衝撃が加わったときに４ｋＮの荷重が作用することが想定され、その荷重による組電池１００の変形によって、短絡部材４０と低電位部１０Ｌ及び高電位部１０Ｈとの間隔が１ｍｍ狭くなることが算出されたと仮定する。この場合、短絡部材４０と高電位部１０Ｈとの間隔、及び、短絡部材４０と低電位部１０Ｌとの間隔は、１ｍｍ以下に設定することができる。   For example, it is assumed that a load of 4 kN is applied when an impact is applied to the assembled battery 100, and due to the deformation of the assembled battery 100 due to the load, the distance between the short circuit member 40 and the low potential portion 10L and the high potential portion 10H is increased. Assume that it has been calculated to be 1 mm narrower. In this case, the interval between the short-circuit member 40 and the high potential portion 10H and the interval between the short-circuit member 40 and the low potential portion 10L can be set to 1 mm or less.

また、組電池１００に衝撃が加わったときに４０ｋＮの荷重が作用することが想定され、その荷重による組電池１００の変形によって、短絡部材４０と低電位部１０Ｌ及び高電位部１０Ｈとの間隔が２ｍｍ狭くなることが算出されたと仮定する。この場合、短絡部材４０と高電位部１０Ｈとの間隔、及び、短絡部材４０と低電位部１０Ｌとの間隔は、２ｍｍ以下に設定することができる。組電池１００に作用する衝撃による外力は、例えば、組電池１００の製造時に作用する圧縮力の２倍から５倍程度と想定することができる。   Further, it is assumed that a load of 40 kN is applied when an impact is applied to the assembled battery 100, and due to the deformation of the assembled battery 100 due to the load, the distance between the short-circuit member 40 and the low potential portion 10L and the high potential portion 10H is increased. Assume that 2 mm narrowing was calculated. In this case, the interval between the short-circuit member 40 and the high potential portion 10H and the interval between the short-circuit member 40 and the low potential portion 10L can be set to 2 mm or less. The external force due to the impact acting on the assembled battery 100 can be assumed to be, for example, about 2 to 5 times the compressive force acting when the assembled battery 100 is manufactured.

本実施形態の組電池１００において、短絡部材４０は、二次電池１０を保持する筐体であるセルホルダ２０に固定されている。より具体的には、セルホルダ２０は、扁平角形の電池容器１１の広側面１１ｗに対向するスペーサ部２１を有し、短絡部材４０は、スペーサ部２１に固定されている。短絡部材４０は、例えば、インサート成形によってセルホルダ２０に固定することができる。また、短絡部材４０は、例えば、ボルトやリベット等の機械的な締結手段によってセルホルダ２０に固定してもよいし、粘着テープや接着剤によってセルホルダ２０に固定することもできる。   In the assembled battery 100 of the present embodiment, the short-circuit member 40 is fixed to the cell holder 20 that is a housing that holds the secondary battery 10. More specifically, the cell holder 20 has a spacer portion 21 that faces the wide side surface 11 w of the flat rectangular battery case 11, and the short-circuit member 40 is fixed to the spacer portion 21. The short-circuit member 40 can be fixed to the cell holder 20 by insert molding, for example. Further, the short-circuit member 40 may be fixed to the cell holder 20 by a mechanical fastening means such as a bolt or a rivet, or may be fixed to the cell holder 20 by an adhesive tape or an adhesive.

以下、本実施形態の組電池１００の作用について説明する。   Hereinafter, the operation of the assembled battery 100 of the present embodiment will be described.

前述のように、本実施形態の組電池１００は、厚さ方向に積層された扁平角形の複数の二次電池１０を備え、積層方向に隣り合う一方の二次電池１０の正極外部端子１６Ｐと他方の二次電池１０の負極外部端子１６Ｎが順次接続されている。ここで、複数の二次電池１０の積層方向に隣り合う一方の二次電池１０の正極外部端子１６Ｐと他方の二次電池１０の負極外部端子１６Ｎは、バスバー３０によって順次接続されている。   As described above, the assembled battery 100 according to the present embodiment includes the plurality of flat rectangular secondary batteries 10 stacked in the thickness direction, and the positive external terminal 16P of one secondary battery 10 adjacent in the stacking direction. The negative electrode external terminal 16N of the other secondary battery 10 is sequentially connected. Here, the positive external terminal 16P of one secondary battery 10 and the negative external terminal 16N of the other secondary battery 10 adjacent to each other in the stacking direction of the plurality of secondary batteries 10 are sequentially connected by the bus bar 30.

この構成により、組電池１００は、例えば発電機等の外部機器から供給された電力を、積層方向の一端の二次電池１０の正極外部端子１６Ｐと、積層方向の他端の二次電池１０の負極外部端子１６Ｎとを介して、直列に接続された複数の二次電池１０に供給して充電することができる。また、組電池１００は、直列に接続された複数の二次電池１０に充電された電力を、積層方向の一端の二次電池１０の正極外部端子１６Ｐに接続されたバスバー３０と、積層方向の他端の二次電池１０の負極外部端子１６Ｎに接続されたバスバー３０とを介して、例えばモータ等の外部機器へ供給することができる。   With this configuration, the assembled battery 100 supplies power supplied from an external device such as a generator to the positive external terminal 16P of the secondary battery 10 at one end in the stacking direction and the secondary battery 10 at the other end in the stacking direction. A plurality of secondary batteries 10 connected in series can be supplied and charged via the negative electrode external terminal 16N. In addition, the assembled battery 100 includes power charged in a plurality of secondary batteries 10 connected in series with a bus bar 30 connected to the positive external terminal 16P of the secondary battery 10 at one end in the stacking direction, It can be supplied to an external device such as a motor through the bus bar 30 connected to the negative electrode external terminal 16N of the secondary battery 10 at the other end.

また、組電池１００は、導電性を有する短絡部材４０を備えている。短絡部材４０は、積層方向に隣接する任意の二つの二次電池１０のうち、一方の二次電池１０の負極外部端子１６Ｎを含む低電位部１０Ｌと、前記他方の二次電池１０の正極外部端子１６Ｐを含む高電位部１０Ｈとに対向している。また、短絡部材４０は、当該低電位部１０Ｌと高電位部１０Ｈの双方との間に間隙を有している。そのため、組電池１００の通常の使用時においては、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０との間が電気的に絶縁され、低電位部１０Ｌと高電位部１０Ｈとが短絡することが防止されている。   The assembled battery 100 includes a short-circuit member 40 having conductivity. The short-circuit member 40 includes a low potential portion 10L including the negative electrode external terminal 16N of one secondary battery 10 of any two secondary batteries 10 adjacent in the stacking direction, and the positive electrode external of the other secondary battery 10. It faces the high potential portion 10H including the terminal 16P. The short-circuit member 40 has a gap between both the low potential portion 10L and the high potential portion 10H. Therefore, during normal use of the assembled battery 100, the low potential portion 10L and the high potential portion 10H are electrically insulated from the short-circuit member 40, and the low potential portion 10L and the high potential portion 10H are short-circuited. It is prevented.

なお、短絡部材４０は、低電位部１０Ｌと高電位部１０Ｈの少なくとも一方との間に間隙を有していればよい。短絡部材４０が低電位部１０Ｌと高電位部１０Ｈの少なくとも一方との間に間隙を有することで、これらのいずれか一方と接していても、低電位部１０Ｌと高電位部１０Ｈとが電気的に絶縁される。これにより、組電池１００の通常の使用時における低電位部１０Ｌと高電位部１０Ｈとの短絡を防止することができる。   The short-circuit member 40 only needs to have a gap between at least one of the low potential portion 10L and the high potential portion 10H. Since the short-circuit member 40 has a gap between at least one of the low potential portion 10L and the high potential portion 10H, the low potential portion 10L and the high potential portion 10H are electrically connected even if they are in contact with either one of them. Insulated. Thereby, a short circuit between the low potential portion 10L and the high potential portion 10H during normal use of the assembled battery 100 can be prevented.

例えば、車両の衝突等によって組電池１００に衝撃が加わると、組電池１００の製造時に作用する圧縮力よりも数倍大きい荷重が組電池１００に作用する場合がある。このような場合、例えば前記特許文献１に記載された従来の電池モジュールでは、二次電池に内部短絡が発生して内圧が上昇し、二次電池が膨張して短絡回路が形成され、二次電池に蓄えられたエネルギーが放出される。しかし、二次電池の内部短絡によって内圧が上昇する場合には、短時間で熱暴走状態に至る虞がある。また、ガス排出弁が開放されて二次電池の内圧が低下すると、膨張した二次電池が元に戻り、短絡回路が形成されない虞がある。   For example, when an impact is applied to the assembled battery 100 due to a vehicle collision or the like, a load that is several times larger than the compressive force acting when the assembled battery 100 is manufactured may act on the assembled battery 100. In such a case, for example, in the conventional battery module described in Patent Document 1, an internal short circuit occurs in the secondary battery, the internal pressure rises, the secondary battery expands, and a short circuit is formed. The energy stored in the battery is released. However, when the internal pressure increases due to an internal short circuit of the secondary battery, there is a possibility that a thermal runaway state may be reached in a short time. Further, when the gas discharge valve is opened and the internal pressure of the secondary battery decreases, the expanded secondary battery returns to its original state, and there is a possibility that a short circuit is not formed.

図５Ａは、図４Ａに示す本実施形態の組電池１００が、二次電池１０の積層方向の荷重を受けて変形した後のセルホルダ２０及び短絡部材４０を示す平面図である。図５Ｂは、図５Ａに示すＢ−Ｂ線に沿うセルホルダ及び短絡部材の断面図である。   FIG. 5A is a plan view showing the cell holder 20 and the short-circuit member 40 after the assembled battery 100 of the present embodiment shown in FIG. 4A is deformed by receiving a load in the stacking direction of the secondary battery 10. FIG. 5B is a cross-sectional view of the cell holder and the short-circuit member along the line BB shown in FIG. 5A.

本実施形態の組電池１００は、衝撃が加わって製造時に作用する圧縮力よりも数倍大きい荷重が作用すると、各部材の変形によって、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０との間隔が狭まる。   In the assembled battery 100 of the present embodiment, when a load several times larger than the compressive force acting at the time of manufacture is applied due to an impact, the deformation of each member causes the low potential portion of the two secondary batteries 10 adjacent in the stacking direction. The space | interval of 10L and the high electric potential part 10H, and the short circuit member 40 becomes narrow.

より具体的には、組電池１００に二次電池１０の積層方向の衝撃が加わって荷重が作用すると、例えばセルホルダ２０のスペーサ部２１が圧縮されて変形したり、二次電池１０の電池容器１１が圧縮されて変形したりする。このような組電池１００を構成する各部材の変形により、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０との間隔が狭まる。   More specifically, when an impact in the stacking direction of the secondary battery 10 is applied to the assembled battery 100 and a load is applied, for example, the spacer portion 21 of the cell holder 20 is compressed and deformed, or the battery container 11 of the secondary battery 10. Is compressed and deformed. Due to the deformation of each member constituting the assembled battery 100, the distance between the short potential member 10 and the low potential portion 10L and the high potential portion 10H of the two secondary batteries 10 adjacent in the stacking direction is narrowed.

積層方向に隣り合う二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０との間隔がさらに狭まると、互いに対向する短絡部材４０と低電位部１０Ｌ及び高電位部１０Ｈとが接触する。これにより、短絡部材４０を介して積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   When the distance between the low potential portion 10L and the high potential portion 10H of the secondary battery 10 adjacent in the stacking direction and the short circuit member 40 is further reduced, the short circuit member 40, the low potential portion 10L, and the high potential portion 10H facing each other Contact. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction via the short-circuit member 40 are short-circuited.

このようにして、組電池１００のすべての二次電池１０において、短絡部材４０を介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   Thus, in all the secondary batteries 10 of the assembled battery 100, the low potential portion 10L and the high potential portion 10H can be short-circuited via the short-circuit member 40. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池１００によれば、衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。   Therefore, according to the assembled battery 100 of the present embodiment, the safety of the secondary battery 10 against an external force due to an impact or the like can be improved as compared with the related art.

なお、低電位部１０Ｌ及び高電位部１０Ｈの一方と、短絡部材４０とを予め接触させおくことで、より小さい荷重又はより少ない変形量で積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとを短絡させることも可能である。   In addition, the low potential of the two secondary batteries 10 adjacent to each other in the stacking direction with a smaller load or a smaller amount of deformation by bringing one of the low potential portion 10L and the high potential portion 10H into contact with the short-circuit member 40 in advance. It is also possible to short-circuit the part 10L and the high potential part 10H.

また、本実施形態の組電池１００は、積層方向に隣り合う一方の二次電池１０の正極外部端子１６Ｐと他方の二次電池１０の負極外部端子１６Ｎを順次接続する複数のバスバー３０を備えている。そして、積層方向に隣り合う二つの二次電池１０において、低電位部１０Ｌは、一方の二次電池１０の負極外部端子１６Ｎに接続されたバスバー３０を含み、高電位部１０Ｈは、他方の二次電池１０の正極外部端子１６Ｐに接続されたバスバー３０を含んでいる。   In addition, the assembled battery 100 of the present embodiment includes a plurality of bus bars 30 that sequentially connect the positive electrode external terminal 16P of one secondary battery 10 and the negative electrode external terminal 16N of the other secondary battery 10 that are adjacent in the stacking direction. Yes. In the two secondary batteries 10 adjacent in the stacking direction, the low potential portion 10L includes the bus bar 30 connected to the negative electrode external terminal 16N of the one secondary battery 10, and the high potential portion 10H includes the other two secondary batteries 10. A bus bar 30 connected to the positive electrode external terminal 16P of the secondary battery 10 is included.

そのため、短絡部材４０と、一方の二次電池１０の正極外部端子１６Ｐ又は他方の二次電池の負極外部端子１６Ｎとが接触しなくても、短絡部材４０とバスバー３０とが接触することで、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。また、短絡部材４０と、一方の二次電池１０の正極外部端子１６Ｐ及びそれに接続されたバスバー３０、又は、他方の二次電池の負極外部端子１６Ｎ及びそれに接続されたバスバー３０とを、同時に接触させることもできる。これにより、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとをより短絡させ易くすることができる。   Therefore, even if the short circuit member 40 and the positive electrode external terminal 16P of one secondary battery 10 or the negative electrode external terminal 16N of the other secondary battery do not contact, the short circuit member 40 and the bus bar 30 are in contact with each other. The low potential portion 10L and the high potential portion 10H of the two secondary batteries 10 adjacent in the stacking direction can be short-circuited. Further, the short-circuit member 40 and the positive external terminal 16P of one secondary battery 10 and the bus bar 30 connected thereto, or the negative external terminal 16N of the other secondary battery and the bus bar 30 connected thereto are simultaneously contacted. It can also be made. Thereby, the low potential part 10L and the high potential part 10H of the two secondary batteries 10 adjacent in the stacking direction can be more easily short-circuited.

また、組電池１００は、二次電池１０を保持するセルホルダ２０を備えている。そして、短絡部材４０は、セルホルダ２０に固定されている。これにより、積層方向に隣り合う二つ二次電池１０の低電位部１０Ｌと高電位部１０Ｈとに、短絡部材４０を対向させて配置するのが容易になる。   The assembled battery 100 includes a cell holder 20 that holds the secondary battery 10. The short-circuit member 40 is fixed to the cell holder 20. Thereby, it becomes easy to arrange the short-circuit member 40 to face the low potential portion 10L and the high potential portion 10H of the two secondary batteries 10 adjacent in the stacking direction.

本実施形態の組電池１００において、セルホルダ２０は、扁平角形の電池容器１１の広側面１１ｗに対向するスペーサ部２１を有し、短絡部材４０は、セルホルダ２０のスペーサ部２１に固定されている。これにより、積層方向に隣り合う二つ二次電池１０の低電位部１０Ｌと高電位部１０Ｈとに対して、二次電池１０の積層方向に対向させて短絡部材４０を配置するのが容易になる。   In the assembled battery 100 of the present embodiment, the cell holder 20 has a spacer portion 21 that faces the wide side surface 11 w of the flat rectangular battery container 11, and the short-circuit member 40 is fixed to the spacer portion 21 of the cell holder 20. Thereby, it is easy to arrange the short-circuit member 40 so as to face the low potential portion 10L and the high potential portion 10H of the two secondary batteries 10 adjacent in the stacking direction in the stacking direction of the secondary battery 10. Become.

これにより、組電池１００に、二次電池１０の積層方向の衝撃による荷重が作用したときに、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとに短絡部材４０を接触させることができる。したがって、二次電池１０の積層方向の衝撃による荷重が作用したときに、短絡部材４０を介して積層方向に隣り合う二つの二次電池１０を短絡させることができる。   Accordingly, when a load due to an impact in the stacking direction of the secondary battery 10 is applied to the assembled battery 100, the short-circuit member is connected to the low potential portion 10L and the high potential portion 10H of the two secondary batteries 10 adjacent in the stacking direction. 40 can be brought into contact. Therefore, when a load due to an impact in the stacking direction of the secondary battery 10 is applied, the two secondary batteries 10 adjacent in the stacking direction can be short-circuited via the short-circuit member 40.

以上説明したように、本実施形態の組電池１００によれば、例えば車両の衝突等により衝撃が加わって高い荷重が作用した場合に、二次電池１０に蓄えられた電気エネルギーを速やかにかつ安全に放出することができ、二次災害等を防止することができる。したがって、本実施形態の組電池１００によれば、衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。よって、本実施形態の組電池１００は、大容量、高入力特性とともに、高い安全性が要求される車載用の組電池として適している。   As described above, according to the assembled battery 100 of the present embodiment, the electrical energy stored in the secondary battery 10 can be quickly and safely when a high load is applied due to an impact caused by a vehicle collision or the like. Can be released to prevent secondary disasters. Therefore, according to the assembled battery 100 of the present embodiment, the safety of the secondary battery 10 against an external force due to an impact or the like can be improved as compared with the related art. Therefore, the assembled battery 100 of this embodiment is suitable as an assembled battery for vehicles that require high safety as well as large capacity and high input characteristics.

［実施形態２］
次に、本発明の実施形態２に係る組電池について、図１から図３を援用し、図６Ａ及び図６Ｂ、並びに、図７Ａ及び図７Ｂを用いて説明する。[Embodiment 2]
Next, an assembled battery according to Embodiment 2 of the present invention will be described with reference to FIGS. 1 to 3 and FIGS. 6A and 6B and FIGS. 7A and 7B.

図６Ａは、図４Ａに相当する本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ａを示す平面図である。図６Ｂは、図６Ａに示すＢ−Ｂ線に沿うセルホルダ２０及び短絡部材４０Ａの断面図である。   FIG. 6A is a plan view showing the cell holder 20 and the short-circuit member 40A between the two secondary batteries 10 of the assembled battery of the present embodiment corresponding to FIG. 4A. 6B is a cross-sectional view of cell holder 20 and short-circuit member 40A along the line BB shown in FIG. 6A.

本実施形態の組電池は、短絡部材４０Ａが、セルホルダ２０の側板部２２に固定されている点で、前述の実施形態１の組電池１００と異なっている。本実施形態の組電池のその他の点は、前述の実施形態１の組電池と同一であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery of this embodiment is different from the assembled battery 100 of Embodiment 1 described above in that the short-circuit member 40A is fixed to the side plate portion 22 of the cell holder 20. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

前述の実施形態１の組電池１００で説明したように、セルホルダ２０は、二次電池１０の扁平角形の電池容器１１の狭側面１１ｎに対向する側板部２２を有している。短絡部材４０Ａは、セルホルダ２０の側板部２２に固定されている。これにより、短絡部材４０Ａは、積層方向に隣り合う二つの二次電池１０のうち、一方の二次電池１０の負極外部端子１６Ｎを含む低電位部１０Ｌと、他方の二次電池１０の正極外部端子１６Ｐを含む高電位部１０Ｈとに、電池容器１１の幅方向に対向している。また、短絡部材４０Ａは、これら低電位部１０Ｌと高電位部１０Ｈの双方との間に、電池容器１１の幅方向に間隙を有している。   As described in the assembled battery 100 of Embodiment 1 described above, the cell holder 20 has the side plate portion 22 that faces the narrow side surface 11 n of the flat rectangular battery container 11 of the secondary battery 10. The short-circuit member 40 </ b> A is fixed to the side plate portion 22 of the cell holder 20. Accordingly, the short-circuit member 40A includes the low potential portion 10L including the negative external terminal 16N of one secondary battery 10 and the external positive electrode of the other secondary battery 10 out of the two secondary batteries 10 adjacent in the stacking direction. The battery container 11 faces the high potential portion 10H including the terminal 16P in the width direction. In addition, the short-circuit member 40A has a gap in the width direction of the battery container 11 between both the low potential portion 10L and the high potential portion 10H.

図７Ａは、図６Ａに示す本実施形態の組電池が、電池容器１１の幅方向の荷重を受けて変形した後のセルホルダ２０及び短絡部材４０Ａを示す平面図である。図７Ｂは、図７Ａに示すＢ−Ｂ線に沿うセルホルダ２０及び短絡部材４０Ａの断面図である。   FIG. 7A is a plan view showing the cell holder 20 and the short-circuit member 40A after the assembled battery of the present embodiment shown in FIG. 6A is deformed by receiving a load in the width direction of the battery container 11. FIG. FIG. 7B is a cross-sectional view of the cell holder 20 and the short-circuit member 40A along the line BB shown in FIG. 7A.

例えば、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の幅方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の幅方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、セルホルダ２０の側板部２２が電池容器１１の幅方向に圧縮されて変形し、又は、側板部２２に固定された短絡部材４０Ａが、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈへ向けて変形する。   For example, an impact in the width direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery of the present embodiment due to a vehicle collision or the like, and the load is several times larger than the load that is applied during normal use of the assembled battery. May act in the width direction of the battery case 11. In such a case, in the assembled battery of the present embodiment, for example, the side plate portion 22 of the cell holder 20 is compressed and deformed in the width direction of the battery container 11, or the short-circuit member 40A fixed to the side plate portion 22 is The two secondary batteries 10 adjacent in the stacking direction are deformed toward the low potential portion 10L and the high potential portion 10H.

これにより、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ａとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ａとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   Thereby, the space | interval of the low potential part 10L and the high potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the short circuit member 40A becomes narrow, and the low potential part 10L and the high potential part 10H, and the short circuit member 40A contacts. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

このようにして、組電池のすべての二次電池１０において、短絡部材４０Ａを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   Thus, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10H can be short-circuited via the short-circuit member 40A. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の幅方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。   Therefore, according to the assembled battery of the present embodiment, as in the assembled battery 100 of the first embodiment, the safety of the secondary battery 10 against external force due to the impact in the width direction of the battery container 11 and the like is improved as compared with the related art. be able to.

なお、短絡部材４０Ａは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。また、短絡部材４０Ａの形状は、平板状の形状に限定されず、Ｕ字形又はチャネル形等、一方向が開放された矩形の形状を有してもよい。   Note that the short-circuit member 40A may be brought into contact with either the low potential portion 10L or the high potential portion 10H of two adjacent secondary batteries 10 in advance. In addition, the shape of the short-circuit member 40A is not limited to a flat plate shape, and may have a rectangular shape with one direction open, such as a U shape or a channel shape.

［実施形態３］
次に、本発明の実施形態３に係る組電池について、図１から図３を援用し、図８Ａから図８Ｃを用いて説明する。[Embodiment 3]
Next, an assembled battery according to Embodiment 3 of the present invention will be described using FIGS. 1 to 3 and FIGS. 8A to 8C.

図８Ａは、図４Ａに相当する本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ｂを示す平面図である。図８Ｂは、図８Ａに示すＢ−Ｂ線に沿うセルホルダ２０及び短絡部材４０Ｂの断面図である。   FIG. 8A is a plan view showing the cell holder 20 and the short-circuit member 40B between the two secondary batteries 10 of the assembled battery of the present embodiment corresponding to FIG. 4A. FIG. 8B is a cross-sectional view of the cell holder 20 and the short-circuit member 40B along the line BB shown in FIG. 8A.

本実施形態の組電池は、バスバー３０を保持するバスバーホルダ５０を有し、短絡部材４０Ｂがバスバーホルダ５０に固定されている点で、前述の実施形態１の組電池１００と異なっている。本実施形態の組電池のその他の点は、前述の実施形態１の組電池１００と同一であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery of this embodiment is different from the assembled battery 100 of Embodiment 1 described above in that it has a bus bar holder 50 that holds the bus bar 30 and the short-circuit member 40B is fixed to the bus bar holder 50. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery 100 of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池は、バスバー３０を保持するバスバーホルダ５０を有し、短絡部材４０Ｂがバスバーホルダ５０に固定されている。バスバーホルダ５０の素材は、例えば絶縁性を有する樹脂材料である。短絡部材４０Ｂは、例えばインサート成形によってバスバーホルダ５０に固定することができる。なお、短絡部材４０Ｂは、ボルトやリベットなどの機械的固定手段、又は粘着テープや接着剤等によってバスバーホルダ５０に固定されていてもよい。   The assembled battery of the present embodiment includes a bus bar holder 50 that holds the bus bar 30, and the short-circuit member 40 </ b> B is fixed to the bus bar holder 50. The material of the bus bar holder 50 is, for example, an insulating resin material. The short-circuit member 40B can be fixed to the bus bar holder 50 by insert molding, for example. The short-circuit member 40B may be fixed to the bus bar holder 50 by a mechanical fixing means such as a bolt or a rivet, or an adhesive tape or an adhesive.

短絡部材４０Ｂは、バスバーホルダ５０に保持されて、複数の二次電池１０の積層方向に隣り合う任意の二つの二次電池１０の低電位部Ｌと高電位部１０Ｈとに、電池容器１１の高さ方向に対向している。また、短絡部材４０Ｂは、これら低電位部１０Ｌと高電位部１０Ｈとの間に、電池容器１１の高さ方向に間隔を有している。   The short-circuit member 40B is held by the bus bar holder 50 and is connected to the low potential portion L and the high potential portion 10H of any two secondary batteries 10 adjacent to each other in the stacking direction of the plurality of secondary batteries 10. Opposite the height direction. Further, the short-circuit member 40B has an interval in the height direction of the battery case 11 between the low potential portion 10L and the high potential portion 10H.

より詳細には、短絡部材４０Ｂは、複数の二次電池１０の積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌを構成する一方の二次電池１０の負極外部端子１６Ｎと、高電位部１０Ｈを構成する他方の二次電池１０の正極外部端子１６Ｐに対向している。また、短絡部材４０Ｂは、隣り合う二つの二次電池１０のうち、一方の二次電池１０の負極外部端子１６Ｎと、他方の二次電池１０の正極外部端子１６Ｐとの間に、間隔を有している。短絡部材４０Ｂは、電池容器１１の幅方向を長手方向とする概ね直方体のブロック形状を有している。   More specifically, the short-circuit member 40B includes a negative external terminal 16N of one secondary battery 10 constituting the low potential portion 10L of two secondary batteries 10 adjacent to each other in the stacking direction of the plurality of secondary batteries 10, and a high Opposite to the positive external terminal 16P of the other secondary battery 10 constituting the potential unit 10H. Further, the short-circuit member 40B has a space between the negative external terminal 16N of one secondary battery 10 and the positive external terminal 16P of the other secondary battery 10 out of two adjacent secondary batteries 10. doing. The short-circuit member 40B has a substantially rectangular parallelepiped block shape with the width direction of the battery case 11 as the longitudinal direction.

図８Ｃは、図８Ｂに示す本実施形態の組電池が、電池容器１１の高さ方向の荷重を受けて変形した後のセルホルダ２０及び短絡部材４０Ｂを示す断面図である。   FIG. 8C is a cross-sectional view showing the cell holder 20 and the short-circuit member 40B after the assembled battery of the present embodiment shown in FIG. 8B is deformed by receiving a load in the height direction of the battery container 11.

例えば、車両の衝突等により、本実施形態の組電池に対し、二次電池１０の電池容器１１の高さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の高さ方向に作用する場合がある。このような場合に、本実施形態の組電池では、例えばバスバーホルダ５０が電池容器１１の高さ方向に圧縮され、バスバーホルダ５０に保持された短絡部材４０Ｂと、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとの間隔が狭くなる。   For example, an impact in the height direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery according to the present embodiment due to a vehicle collision or the like, which is several times larger than the load acting during normal use of the assembled battery. The load may act in the height direction of the battery container 11. In such a case, in the assembled battery of the present embodiment, for example, the bus bar holder 50 is compressed in the height direction of the battery container 11 and the two short-circuit members 40B held by the bus bar holder 50 are adjacent to each other in the stacking direction. The interval between the low potential portion 10L and the high potential portion 10H of the secondary battery 10 is narrowed.

そして、複数の二次電池１０の積層方向に隣り合う任意の二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、これらに対向する短絡部材４０Ｂとが接触して、低電位部１０Ｌと高電位部１０Ｈとが短絡部材４０Ｂを介して短絡する。このようにして、組電池のすべての二次電池１０において、短絡部材４０Ｂを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   Then, the low potential portion 10L and the high potential portion 10H of any two secondary batteries 10 adjacent to each other in the stacking direction of the plurality of secondary batteries 10 and the short-circuit member 40B facing them come into contact with each other, so that the low potential portion 10L and the high potential portion 10H are short-circuited via the short-circuit member 40B. Thus, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10H can be short-circuited via the short-circuit member 40B. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の高さ方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。   Therefore, according to the assembled battery of the present embodiment, as in the assembled battery 100 of the first embodiment, the safety of the secondary battery 10 against external force due to the impact in the height direction of the battery container 11 and the like is improved as compared with the related art. Can be made.

なお、短絡部材４０Ｂは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。また、短絡部材４０Ｂの形状は、平板状の形状に限定されず、Ｕ字形又はチャネル形等、一方向が開放された矩形の形状を有してもよい。   The short-circuit member 40B may be previously brought into contact with either the low potential portion 10L or the high potential portion 10H of the two adjacent secondary batteries 10. Further, the shape of the short-circuit member 40B is not limited to a flat plate shape, and may have a rectangular shape with one direction opened, such as a U shape or a channel shape.

［実施形態４］
次に、本発明の実施形態４に係る組電池について、図１から図３を援用し、図９を用いて説明する。図９は、図６Ａに相当する本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ｃを示す平面図である。[Embodiment 4]
Next, an assembled battery according to Embodiment 4 of the present invention will be described with reference to FIGS. FIG. 9 is a plan view showing the cell holder 20 and the short-circuit member 40 </ b> C between the two secondary batteries 10 of the assembled battery of the present embodiment corresponding to FIG. 6A.

本実施形態の組電池は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈに、短絡部材４０Ｃが電池容器１１の厚さ方向及び幅方向に対向する点で、前述の実施形態２の組電池と異なっている。本実施形態の組電池のその他の点は、前述の実施形態２の組電池と同一であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery of the present embodiment is the above-described in that the short-circuit member 40C faces the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the thickness direction and the width direction of the battery container 11. This is different from the assembled battery of the second embodiment. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery of the above-described second embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池において、短絡部材４０Ｃは、電池容器１１の幅方向に延びる第１部分４１と、第１部分４１の一端から電池容器１１の厚さ方向の両側へ延びる第２部分とを有する、概ねＴ字形の形状を有している。   In the assembled battery of the present embodiment, the short-circuit member 40C includes a first portion 41 extending in the width direction of the battery case 11 and a second portion extending from one end of the first portion 41 to both sides in the thickness direction of the battery case 11. It has a generally T-shaped shape.

短絡部材４０Ｃの第１部分４１は、例えば板状の短絡部材４０ＣがＵ字状に湾曲して折り返された部分である。第１部分４１は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとの間に配置され、低電位部１０Ｌ及び高電位部１０Ｈに電池容器１１の厚さ方向に対向している。第１部分４１は、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。第１部分４１は、セルホルダ２０のスペーサ部２１に固定されている。   The first portion 41 of the short-circuit member 40C is a portion where, for example, a plate-like short-circuit member 40C is bent and bent in a U shape. The first portion 41 is disposed between the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10, and faces the low potential portion 10L and the high potential portion 10H in the thickness direction of the battery container 11. doing. The first portion 41 is spaced from the low potential portion 10L and the high potential portion 10H. The first portion 41 is fixed to the spacer portion 21 of the cell holder 20.

短絡部材４０Ｃの第２部分４２は、例えば板状の短絡部材４０Ｃが第１部分４１の基端部で電池容器１１の厚さ方向に曲折された平板状の部分である。第２部分４２は、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の幅方向に対向している。第２部分４２は、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。第２部分４２は、セルホルダ２０の側板部２２に固定されている。   The second portion 42 of the short-circuit member 40 </ b> C is, for example, a plate-like portion in which the plate-like short-circuit member 40 </ b> C is bent in the thickness direction of the battery container 11 at the base end portion of the first portion 41. The second portion 42 faces the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the width direction of the battery container 11. The second portion 42 is spaced from the low potential portion 10L and the high potential portion 10H. The second portion 42 is fixed to the side plate portion 22 of the cell holder 20.

例えば、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の厚さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の厚さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う二つの二次電池１０の電池容器１１が厚さ方向に圧縮されて変形する。   For example, an impact in the thickness direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery according to the present embodiment due to a vehicle collision or the like, which is several times larger than the load acting during normal use of the assembled battery. The load may act in the thickness direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the battery containers 11 of the two adjacent secondary batteries 10 are compressed and deformed in the thickness direction.

そして、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｃの第１部分４１との間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｃの第１部分４１とが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the 1st part 41 of the short circuit member 40C becomes narrow, and the low electric potential part 10L and the high electric potential part 10H. And the first portion 41 of the short-circuit member 40C come into contact with each other. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

また、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の幅方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の幅方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う二つの二次電池１０の電池容器１１及びセルホルダ２０が電池容器１１の幅方向に圧縮されて変形する。   Also, a load that is several times larger than the load that is applied during normal use of the assembled battery due to the impact in the width direction of the battery container 11 of the secondary battery 10 applied to the assembled battery of this embodiment due to a vehicle collision or the like. May act in the width direction of the battery case 11. In such a case, in the assembled battery of this embodiment, for example, the battery container 11 and the cell holder 20 of the two adjacent secondary batteries 10 are compressed in the width direction of the battery container 11 and deformed.

そして、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｃの第２部分４２との間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｃの第２部分４２とが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the 2nd part 42 of the short circuit member 40C becomes narrow, and the low electric potential part 10L and the high electric potential part 10H. And the second portion 42 of the short-circuit member 40C come into contact with each other. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

このようにして、組電池のすべての二次電池１０において、電池容器１１の厚さ方向及び幅方向の衝撃による荷重に対し、短絡部材４０Ｃを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   In this way, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10H are connected via the short-circuit member 40C to the load caused by the impact in the thickness direction and the width direction of the battery case 11. Can be short-circuited. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の厚さ方向及び幅方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。なお、短絡部材４０Ｃは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。   Therefore, according to the assembled battery of the present embodiment, the safety of the secondary battery 10 against the external force due to the impact in the thickness direction and the width direction of the battery container 11 is conventionally improved as in the assembled battery 100 of the first embodiment. Can be improved. Note that the short-circuit member 40C may be brought into contact with either the low potential portion 10L or the high potential portion 10H of two adjacent secondary batteries 10 in advance.

［実施形態５］
次に、本発明の実施形態５に係る組電池について、図１から図３を援用し、図１０を用いて説明する。図１０は、図８Ｂに相当する本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ｄを示す断面図である。[Embodiment 5]
Next, an assembled battery according to Embodiment 5 of the present invention will be described with reference to FIGS. FIG. 10 is a cross-sectional view showing the cell holder 20 and the short-circuit member 40D between the two secondary batteries 10 of the battery pack of the present embodiment corresponding to FIG. 8B.

本実施形態の組電池は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈに、短絡部材４０Ｄが電池容器１１の厚さ方向及び高さ方向に対向する点で、前述の実施形態３の組電池と異なっている。本実施形態の組電池のその他の点は、前述の実施形態３の組電池と同様であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery according to the present embodiment is described above in that the short-circuit member 40D faces the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the thickness direction and the height direction of the battery container 11. This is different from the assembled battery of the third embodiment. Since the other points of the assembled battery of this embodiment are the same as those of the assembled battery of the above-described embodiment 3, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池において、短絡部材４０Ｄは、電池容器１１の高さ方向に延びる第１部分４１と、第１部分４１の一端から電池容器１１の厚さ方向の両側へ延びる第２部分とを有している。   In the assembled battery of the present embodiment, the short-circuit member 40D includes a first portion 41 that extends in the height direction of the battery case 11, and a second portion that extends from one end of the first portion 41 to both sides in the thickness direction of the battery case 11. have.

短絡部材４０Ｄの第１部分４１は、例えば板状の短絡部材４０ＤがＵ字状に湾曲して折り返された部分である。第１部分４１は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとの間に配置され、低電位部１０Ｌ及び高電位部１０Ｈに電池容器１１の厚さ方向に対向している。第１部分４１は、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。   The first portion 41 of the short-circuit member 40D is a portion where, for example, a plate-like short-circuit member 40D is bent in a U shape. The first portion 41 is disposed between the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10, and faces the low potential portion 10L and the high potential portion 10H in the thickness direction of the battery container 11. doing. The first portion 41 is spaced from the low potential portion 10L and the high potential portion 10H.

短絡部材４０Ｄの第２部分４２は、例えば板状の短絡部材４０Ｄが第１部分４１の基端部で電池容器１１の厚さ方向に曲折された平板状の部分である。第２部分４２は、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の高さ方向に対向している。第２部分４２は、バスバーホルダ５０に固定され、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。   The second portion 42 of the short-circuit member 40 </ b> D is a plate-like portion in which, for example, the plate-like short-circuit member 40 </ b> D is bent in the thickness direction of the battery container 11 at the base end portion of the first portion 41. The second portion 42 faces the low potential portion 10L and the high potential portion 10H of the two adjacent secondary batteries 10 in the height direction of the battery container 11. The second portion 42 is fixed to the bus bar holder 50 and has a space between the low potential portion 10L and the high potential portion 10H.

例えば、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の厚さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の厚さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う二つの二次電池１０の電池容器１１が厚さ方向に圧縮されて変形する。   For example, an impact in the thickness direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery according to the present embodiment due to a vehicle collision or the like, which is several times larger than the load acting during normal use of the assembled battery. The load may act in the thickness direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the battery containers 11 of the two adjacent secondary batteries 10 are compressed and deformed in the thickness direction.

そして、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｄの第１部分４１との間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｄの第１部分４１とが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the 1st part 41 of the short circuit member 40D becomes narrow, and the low electric potential part 10L and the high electric potential part 10H. And the first portion 41 of the short-circuit member 40D come into contact with each other. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

また、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の高さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の高さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、バスバーホルダ５０が電池容器１１の高さ方向に圧縮されて変形する。   Moreover, the impact in the height direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery of the present embodiment due to a vehicle collision or the like, which is several times larger than the load acting during normal use of the assembled battery. The load may act in the height direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the bus bar holder 50 is deformed by being compressed in the height direction of the battery container 11.

そして、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｄの第２部分４２との間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｄの第２部分４２とが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two adjacent secondary batteries 10 and the 2nd part 42 of the short circuit member 40D becomes narrow, and it short-circuits with the low electric potential part 10L and the high electric potential part 10H. The second portion 42 of the member 40D comes into contact. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

このようにして、組電池のすべての二次電池１０において、電池容器１１の厚さ方向及び高さ方向の衝撃による荷重に対し、短絡部材４０Ｄを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   In this way, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10H with respect to the load due to the impact in the thickness direction and the height direction of the battery container 11 via the short-circuit member 40D. Can be short-circuited. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の厚さ方向及び高さ方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。なお、短絡部材４０Ｄは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。   Therefore, according to the assembled battery of the present embodiment, similarly to the assembled battery 100 of the first embodiment described above, the safety of the secondary battery 10 against external forces due to impacts in the thickness direction and the height direction of the battery container 11 is improved. This can be improved compared to the prior art. Note that the short-circuit member 40D may be previously brought into contact with one of the low potential portion 10L and the high potential portion 10H of the two adjacent secondary batteries 10.

［実施形態６］
次に、本発明の実施形態６に係る組電池について、図１から図３を援用し、図１１を用いて説明する。図１１は、本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ｅを示す斜視図である。[Embodiment 6]
Next, an assembled battery according to Embodiment 6 of the present invention will be described with reference to FIGS. FIG. 11 is a perspective view showing the cell holder 20 and the short-circuit member 40E between the two secondary batteries 10 of the assembled battery of the present embodiment.

本実施形態の組電池は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈに、短絡部材４０Ｅが電池容器１１の幅方向及び高さ方向に対向する点で、前述の実施形態２の組電池と異なっている。本実施形態の組電池のその他の点は、前述の実施形態２の組電池と同様であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery of the present embodiment is the above-described in that the short-circuit member 40E faces the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the width direction and the height direction of the battery container 11. This is different from the assembled battery of the second embodiment. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery of the second embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池において、短絡部材４０Ｅは、互いに垂直な平板状の第１部分４０ａと第２部分４０ｂと有する断面形状がＬ字形の部材である。第１部分４０ａは、電池容器１１の上面１１ｔと概ね平行であり、電池容器１１の幅方向及び厚さ方向に延在している。第２部分４０ｂは、第１部分４０ａの一端から電池容器１１の狭側面１１ｎと概ね平行に、電池容器１１の高さ方向及び厚さ方向に延在し、セルホルダ２０の側板部２２に固定されている。   In the assembled battery of the present embodiment, the short-circuit member 40E is a member having an L-shaped cross section having a flat plate-like first portion 40a and a second portion 40b that are perpendicular to each other. The first portion 40 a is substantially parallel to the upper surface 11 t of the battery case 11 and extends in the width direction and the thickness direction of the battery case 11. The second portion 40b extends from one end of the first portion 40a substantially in parallel with the narrow side surface 11n of the battery container 11 in the height direction and the thickness direction of the battery container 11, and is fixed to the side plate portion 22 of the cell holder 20. ing.

第１部分４０ａは、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の高さ方向に対向し、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。第２部分４０ｂは、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の幅方向に対向し、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。   The first portion 40a is opposed to the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the height direction of the battery container 11, and is between the low potential portion 10L and the high potential portion 10H. Have an interval. The second portion 40b is opposed to the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the width direction of the battery container 11, and is spaced between the low potential portion 10L and the high potential portion 10H. have.

例えば、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の高さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の高さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、セルホルダ２０が電池容器１１の高さ方向に圧縮されて変形する。   For example, an impact in the height direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery of this embodiment due to a vehicle collision or the like, and is several times larger than the load acting during normal use of the assembled battery. The load may act in the height direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the cell holder 20 is compressed and deformed in the height direction of the battery container 11.

そして、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｅの第１部分４０ａとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｅの第１部分４０ａとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the 1st part 40a of the short circuit member 40E becomes narrow, and the low electric potential part 10L and the high electric potential part 10H. And the 1st part 40a of the short circuit member 40E contacts. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

また、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の幅方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の幅方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う２つの二次電池１０の電池容器１１及びセルホルダ２０が電池容器１１の幅方向に圧縮されて変形する。   Also, a load that is several times larger than the load that is applied during normal use of the assembled battery due to the impact in the width direction of the battery container 11 of the secondary battery 10 applied to the assembled battery of this embodiment due to a vehicle collision or the like. May act in the width direction of the battery case 11. In such a case, in the assembled battery of this embodiment, for example, the battery container 11 and the cell holder 20 of the two adjacent secondary batteries 10 are compressed and deformed in the width direction of the battery container 11.

そして、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｅの第２部分４０ｂとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｅの第２部分４０ｂとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two adjacent secondary batteries 10 and the 2nd part 40b of the short circuit member 40E becomes narrow, and it short-circuits with the low electric potential part 10L and the high electric potential part 10H. The second portion 40b of the member 40E comes into contact. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

このようにして、組電池のすべての二次電池１０において、電池容器１１の厚さ方向及び高さ方向の衝撃による荷重に対し、短絡部材４０Ｅを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   In this way, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10H are subjected to the load due to the impact in the thickness direction and the height direction of the battery container 11 via the short-circuit member 40E. Can be short-circuited. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の高さ方向及び幅方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。なお、短絡部材４０Ｅは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。   Therefore, according to the assembled battery of the present embodiment, the safety of the secondary battery 10 against the external force due to the impact in the height direction and the width direction of the battery container 11 is conventionally improved as in the assembled battery 100 of the first embodiment. Can be improved. Note that the short-circuit member 40E may be brought into contact with either the low potential portion 10L or the high potential portion 10H of two adjacent secondary batteries 10 in advance.

［実施形態７］
次に、本発明の実施形態７に係る組電池について、図１から図３を援用し、図１２を用いて説明する。図１２は、本実施形態の組電池の２つの二次電池１０の間のセルホルダ２０及び短絡部材４０Ｆを示す平面図である。[Embodiment 7]
Next, an assembled battery according to Embodiment 7 of the present invention will be described with reference to FIGS. FIG. 12 is a plan view showing the cell holder 20 and the short-circuit member 40F between the two secondary batteries 10 of the assembled battery of the present embodiment.

本実施形態の組電池は、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈに、短絡部材４０Ｆが電池容器１１の厚さ方向、幅方向、及び高さ方向に対向する点で、前述の実施形態２の組電池と異なっている。本実施形態の組電池のその他の点は、前述の実施形態２の組電池と同様であるため、同一の部分には同一の符号を付して説明を省略する。   In the assembled battery of this embodiment, the short-circuit member 40F faces the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the thickness direction, the width direction, and the height direction of the battery container 11. This is different from the assembled battery of Embodiment 2 described above. Since the other points of the assembled battery of this embodiment are the same as those of the assembled battery of the above-described embodiment 2, the same parts are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池において、短絡部材４０Ｆは、互いに垂直な平板状の第１部分４０ａと第２部分４０ｂと有するとともに、電池容器１１の幅方向に延びるＵ字形の第３部分４０ｃと、電池容器１１の高さ方向に延びる柱状の第４部分４０ｄとを有している。短絡部材４０Ｆは、電池容器１１の厚さ方向において、Ｕ字形の第３部分４０ｃの基端部の両側に、それぞれ一対の第１部分４０ａ、第２部分４０ｂ、及び第４部分４０ｄを有している。   In the assembled battery of the present embodiment, the short-circuit member 40F includes a flat plate-like first portion 40a and a second portion 40b that are perpendicular to each other, a U-shaped third portion 40c that extends in the width direction of the battery container 11, and a battery. And a columnar fourth portion 40 d extending in the height direction of the container 11. The short-circuit member 40F has a pair of first portion 40a, second portion 40b, and fourth portion 40d on both sides of the base end portion of the U-shaped third portion 40c in the thickness direction of the battery case 11. ing.

第１部分４０ａは、電池容器１１の上面１１ｔと概ね平行な平板状であり、電池容器１１の幅方向及び厚さ方向に延在している。第２部分４０ｂは、第１部分４０ａの一端から電池容器１１の狭側面１１ｎと概ね平行に延びる平板状であり、電池容器１１の高さ方向及び厚さ方向に延在して、第４部分４０ｄの一端に連結されている。   The first portion 40 a has a flat plate shape substantially parallel to the upper surface 11 t of the battery container 11, and extends in the width direction and the thickness direction of the battery container 11. The second portion 40b has a flat plate shape extending from one end of the first portion 40a substantially in parallel with the narrow side surface 11n of the battery case 11, and extends in the height direction and the thickness direction of the battery case 11 to form a fourth portion. It is connected to one end of 40d.

一対の第１部分４０ａは、それぞれ、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の高さ方向に対向し、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。一対の第２部分４０ｂは、それぞれ、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の幅方向に対向し、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。   The pair of first portions 40a are respectively opposed to the low potential portion 10L and the high potential portion 10H of the two adjacent secondary batteries 10 in the height direction of the battery container 11, and the low potential portion 10L and the high potential portion 10H. There is a gap between them. The pair of second portions 40b are respectively opposed to the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10 in the width direction of the battery container 11, and the low potential portion 10L and the high potential portion 10H There is a gap between them.

第３部分４０ｃは、例えば断面形状が矩形の棒状の部材がＵ字状に湾曲して折り返された部分であり、隣り合う二つの二次電池１０の低電位部１０Ｌと高電位部１０Ｈとの間に配置され、低電位部１０Ｌ及び高電位部１０Ｈに、電池容器１１の厚さ方向に対向している。第３部分４０ｃは、基端部が一対の第２部分４０ｂに連結され、低電位部１０Ｌ及び高電位部１０Ｈとの間に間隔を有している。一対の第４部分４０ｄは、一端が第２部分４０ｂに連結され、他端がセルホルダ２０の側板部２２に固定されている。   The third portion 40c is, for example, a portion in which a rod-like member having a rectangular cross-sectional shape is bent in a U shape, and is connected to the low potential portion 10L and the high potential portion 10H of two adjacent secondary batteries 10. It arrange | positions in between and opposes the low potential part 10L and the high potential part 10H in the thickness direction of the battery container 11. The third portion 40c has a base end connected to the pair of second portions 40b, and has a gap between the low potential portion 10L and the high potential portion 10H. The pair of fourth portions 40 d has one end connected to the second portion 40 b and the other end fixed to the side plate portion 22 of the cell holder 20.

例えば、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の高さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の高さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、セルホルダ２０が電池容器１１の高さ方向に圧縮されて変形する。   For example, an impact in the height direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery of this embodiment due to a vehicle collision or the like, and is several times larger than the load acting during normal use of the assembled battery. The load may act in the height direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the cell holder 20 is compressed and deformed in the height direction of the battery container 11.

そして、積層方向に隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの一対の第１部分４０ａとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの一対の第１部分４０ａとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low potential part 10L and the high potential part 10H of the two secondary batteries 10 adjacent to the lamination direction and the pair of first parts 40a of the short-circuit member 40F becomes narrow, and the low potential part 10L and the high potential The part 10H and the pair of first portions 40a of the short-circuit member 40F are in contact with each other. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

また、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の幅方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の幅方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う２つの二次電池１０の電池容器１１及びセルホルダ２０が電池容器１１の幅方向に圧縮されて変形する。   Also, a load that is several times larger than the load that is applied during normal use of the assembled battery due to the impact in the width direction of the battery container 11 of the secondary battery 10 applied to the assembled battery of this embodiment due to a vehicle collision or the like. May act in the width direction of the battery case 11. In such a case, in the assembled battery of this embodiment, for example, the battery container 11 and the cell holder 20 of the two adjacent secondary batteries 10 are compressed and deformed in the width direction of the battery container 11.

そして、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの一対の第２部分４０ｂとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの一対の第２部分４０ｂとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low potential part 10L and the high potential part 10H of the two adjacent secondary batteries 10 and a pair of 2nd part 40b of the short circuit member 40F becomes narrow, and the low potential part 10L and the high potential part 10H The pair of second portions 40b of the short-circuit member 40F come into contact with each other. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

また、車両の衝突等により、本実施形態の組電池に対して二次電池１０の電池容器１１の厚さ方向の衝撃が加わって、組電池の通常の使用時に作用する荷重よりも数倍大きい荷重が、電池容器１１の厚さ方向に作用する場合がある。このような場合に、本実施形態の組電池において、例えば、隣り合う２つの二次電池１０の電池容器１１及びセルホルダ２０が電池容器１１の厚さ方向に圧縮されて変形する。   In addition, due to a vehicle collision or the like, an impact in the thickness direction of the battery container 11 of the secondary battery 10 is applied to the assembled battery of the present embodiment, which is several times larger than the load acting during normal use of the assembled battery. The load may act in the thickness direction of the battery container 11. In such a case, in the assembled battery of this embodiment, for example, the battery container 11 and the cell holder 20 of the two adjacent secondary batteries 10 are compressed and deformed in the thickness direction of the battery container 11.

そして、隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの第３部分４０ｃとの間隔が狭くなって、低電位部１０Ｌ及び高電位部１０Ｈと、短絡部材４０Ｆの第３部分４０ｃとが接触する。これにより、積層方向に隣り合う二次電池１０の低電位部１０Ｌと高電位部１０Ｈとが短絡する。   And the space | interval of the low electric potential part 10L and the high electric potential part 10H of the two adjacent secondary batteries 10 and the 3rd part 40c of the short circuit member 40F becomes narrow, short circuit with the low electric potential part 10L and the high electric potential part 10H. The third portion 40c of the member 40F comes into contact. Thereby, the low potential part 10L and the high potential part 10H of the secondary battery 10 adjacent to each other in the stacking direction are short-circuited.

このようにして、組電池のすべての二次電池１０において、電池容器１１の厚さ方向、幅方向、及び高さ方向の衝撃による荷重に対し、短絡部材４０Ｆを介して低電位部１０Ｌと高電位部１０Ｈとを短絡させることができる。これにより、個々の二次電池１０に蓄えられていた電気エネルギーが消費され、二次電池１０に内部短絡が発生しても、二次電池１０の内圧や温度が過度に上昇することを防止できる。   In this way, in all the secondary batteries 10 of the assembled battery, the low potential portion 10L and the high potential portion 10F are increased through the short-circuit member 40F against the load caused by the impact in the thickness direction, the width direction, and the height direction of the battery case 11. The potential unit 10H can be short-circuited. Thereby, even if the electrical energy stored in each secondary battery 10 is consumed and an internal short circuit occurs in the secondary battery 10, it is possible to prevent the internal pressure and temperature of the secondary battery 10 from excessively rising. .

したがって、本実施形態の組電池によれば、前述の実施形態１の組電池１００と同様に、電池容器１１の厚さ方向、幅方向、及び高さ方向の衝撃等による外力に対する二次電池１０の安全性を従来よりも向上させることができる。なお、短絡部材４０Ｆは、予め隣り合う二つの二次電池１０の低電位部１０Ｌ及び高電位部１０Ｈのいずれか一方に接触させておいてもよい。   Therefore, according to the assembled battery of the present embodiment, similar to the assembled battery 100 of the first embodiment described above, the secondary battery 10 against an external force due to an impact in the thickness direction, the width direction, and the height direction of the battery container 11 or the like. The safety can be improved as compared with the prior art. Note that the short-circuit member 40F may be previously brought into contact with one of the low potential portion 10L and the high potential portion 10H of the two adjacent secondary batteries 10.

以上、図面を用いて本発明の実施の形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

１０ 二次電池、１０Ｌ 低電位部、１０Ｈ 高電位部、１１ 電池容器、１１ｗ 広側面、１１ｎ 狭側面、１６Ｎ 負極外部端子、１６Ｐ 正極外部端子、２０ セルホルダ、２１ スペーサ部、２２ 側板部、３０ バスバー、４０ 短絡部材、４０Ａ−４０Ｆ 短絡部材、５０ バスバーホルダ、１００ 組電池 10 Secondary battery, 10L Low potential part, 10H High potential part, 11 Battery container, 11w Wide side, 11n Narrow side, 16N Negative external terminal, 16P Positive external terminal, 20 Cell holder, 21 Spacer part, 22 Side plate part, 30 Bus bar 40 short circuit member, 40A-40F short circuit member, 50 bus bar holder, 100 battery pack

Claims (4)

厚さ方向に積層された扁平角形の複数の二次電池を備え、積層方向に隣り合う一方の二次電池の正極外部端子と他方の二次電池の負極外部端子が接続された組電池であって、
導電性を有する短絡部材と、前記二次電池を保持するセルホルダと、を備え、
前記短絡部材は、前記セルホルダに固定されており、前記一方の二次電池の負極外部端子を含む負極側低電位部と、前記他方の二次電池の正極外部端子を含む正極側高電位部とに対向するとともに、前記負極側低電位部と前記正極側高電位部の少なくとも一方との間に間隙を有することを特徴とする組電池。 A battery pack comprising a plurality of flat rectangular secondary batteries stacked in the thickness direction, and connected to the positive external terminal of one secondary battery and the negative external terminal of the other secondary battery adjacent in the stacking direction. And
A short-circuit member having conductivity, and a cell holder for holding the secondary battery ,
The short-circuit member is fixed to the cell holder, and includes a negative electrode-side low potential portion including a negative electrode external terminal of the one secondary battery, and a positive electrode side high potential portion including a positive electrode external terminal of the other secondary battery. And a gap between at least one of the negative electrode side low potential part and the positive electrode side high potential part. 積層方向に隣り合う一方の二次電池の正極外部端子と他方の二次電池の負極外部端子を接続する複数のバスバーを備え、
前記負極側低電位部は、前記一方の二次電池の前記負極外部端子に接続されたバスバーを含み、
前記正極側高電位部は、前記他方の二次電池の前記正極外部端子に接続されたバスバーを含むことを特徴とする請求項１に記載の組電池。 A plurality of bus bars connecting the positive electrode external terminal of one secondary battery adjacent to the stacking direction and the negative electrode external terminal of the other secondary battery,
The negative electrode side low potential portion includes a bus bar connected to the negative electrode external terminal of the one secondary battery,
The assembled battery according to claim 1, wherein the positive electrode side high potential portion includes a bus bar connected to the positive electrode external terminal of the other secondary battery. 前記セルホルダは、前記二次電池の電池容器の広側面に対向するスペーサ部を有し、
前記短絡部材は、前記スペーサ部に固定されていることを特徴とする請求項１に記載の組電池。 The cell holder has a spacer portion facing the wide side surface of the battery container of the secondary battery,
The assembled battery according to claim 1 , wherein the short-circuit member is fixed to the spacer portion. 前記セルホルダは、前記二次電池の電池容器の狭側面に対向する側板部を有し、
前記短絡部材は、前記側板部に固定されていることを特徴とする請求項１に記載の組電池。 The cell holder has a side plate portion facing the narrow side surface of the battery container of the secondary battery,
The assembled battery according to claim 1 , wherein the short-circuit member is fixed to the side plate portion.
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