JP6636887B2 - Power storage device - Google Patents

Power storage device Download PDF

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JP6636887B2
JP6636887B2 JP2016185732A JP2016185732A JP6636887B2 JP 6636887 B2 JP6636887 B2 JP 6636887B2 JP 2016185732 A JP2016185732 A JP 2016185732A JP 2016185732 A JP2016185732 A JP 2016185732A JP 6636887 B2 JP6636887 B2 JP 6636887B2
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洋介 西村
洋介 西村
宏明 垣村
宏明 垣村
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Blue Energy Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、複数の蓄電素子を備える蓄電装置に関する。   The present invention relates to a power storage device including a plurality of power storage elements.

従来から、複数の蓄電セルを備えた蓄電モジュールが知られている（特許文献１参照）。具体的に、前記蓄電モジュールは、一方向（積層方向）に並ぶ複数の蓄電セルと、隣り合う前記蓄電セル間に配置される複数の中間蓄電セルホルダと、積層方向両端の二個の前記蓄電セルの積層方向外側に重ね合わされる一対のエンドプレートと、前記一対のエンドプレートの幅方向両端部に締結される一対の側部締結フレームと、を備える。   BACKGROUND ART Conventionally, a power storage module including a plurality of power storage cells is known (see Patent Literature 1). Specifically, the power storage module includes a plurality of power storage cells arranged in one direction (stacking direction), a plurality of intermediate power storage cell holders disposed between adjacent power storage cells, and two power storage cells at both ends in the stacking direction. And a pair of side fastening frames fastened to both ends in the width direction of the pair of end plates.

前記複数の蓄電セルのそれぞれは、直方体状に形成されている。前記複数の中間蓄電セルホルダのそれぞれは、四角い板状の本体と、前記本体の各角部から積層方向に延び、且つ前記本体と隣り合う前記蓄電セルの四隅と接触することで該蓄電セルの該本体に対する積層方向と直交する面方向への移動を規制する規制部と、を有する。   Each of the plurality of power storage cells is formed in a rectangular parallelepiped shape. Each of the plurality of intermediate power storage cell holders is a rectangular plate-shaped main body, and extends from each corner of the main body in the stacking direction, and contacts the four corners of the power storage cell adjacent to the main body to form the power storage cell. A restricting portion for restricting movement of the main body in a plane direction orthogonal to the laminating direction.

以上の蓄電モジュールを構成する各構成要素（前記蓄電セル、前記中間蓄電セルホルダ等）は、形状や材質等に起因する共振周波数（固有振動数）をそれぞれ有している。これら各構成要素の共振周波数は、十分に高い。このため、前記蓄電モジュールの各構成要素について着目した場合は、該蓄電モジュールが設置（搭載）された装置や車両等の作動時等の振動が伝わっても、各構成要素は共振し難い。   Each of the components (the storage cell, the intermediate storage cell holder, and the like) configuring the power storage module described above has a resonance frequency (natural frequency) caused by a shape, a material, and the like. The resonance frequency of each of these components is sufficiently high. For this reason, when attention is paid to each component of the power storage module, each component is unlikely to resonate even when vibrations at the time of operation of a device or a vehicle in which the power storage module is installed (mounted) are transmitted.

しかし、上記の蓄電モジュールでは、前記中間蓄電セルホルダが隣り合う前記蓄電セルを保持している（即ち、前記中間蓄電セルホルダが隣り合う前記蓄電セルの該中間蓄電セルホルダに対する積層方向と直交する面方向への移動を規制している）ため、前記複数の蓄電セルと前記複数の中間蓄電セルホルダとによって構成される積層体を一つの物体（系）として見ることができ、前記蓄電モジュールにおいてこの積層体に着目した場合には、各構成要素の共振周波数に比べて前記積層体の共振周波数は、大幅に低くなっている。このため、前記積層体における前記蓄電セルの数等によっては、前記蓄電モジュールが設置（搭載）された装置や車両等の作動時等の振動が伝わることで該積層体が共振する場合がある。尚、前記中間蓄電セルホルダが前記蓄電セルを保持していなくても、複数の蓄電セル全体に対して該蓄電セルの積層方向に荷重がかかっていれば、前記複数の蓄電セルによって構成される積層体を、共振周波数の観点から一つの物体（系）として見ることができる。   However, in the above-described power storage module, the intermediate power storage cell holder holds the adjacent power storage cells (that is, the intermediate power storage cell holder is in a plane direction orthogonal to the stacking direction of the adjacent power storage cells with respect to the intermediate power storage cell holder). Of the plurality of storage cells and the plurality of intermediate storage cell holders can be viewed as one object (system). When attention is paid, the resonance frequency of the laminated body is significantly lower than the resonance frequency of each component. For this reason, depending on the number of the power storage cells in the stacked body, the stacked body may resonate due to transmission of vibration during operation of a device, a vehicle, or the like on which the power storage module is installed (mounted). In addition, even if the intermediate storage cell holder does not hold the storage cells, if a load is applied to the entire storage cells in the stacking direction of the storage cells, the stack formed by the plurality of storage cells may be used. The body can be viewed as one object (system) in terms of the resonance frequency.

特開２０１５−９９６４９号公報JP 2015-99649 A

そこで、本実施形態は、複数の蓄電素子を備えていても使用時に外部から伝わる振動によって共振し難い蓄電装置を提供することを目的とする。   Therefore, an object of the present embodiment is to provide a power storage device that is hardly resonated by vibration transmitted from the outside during use even when a plurality of power storage elements are provided.

本実施形態に係る蓄電装置は、
第一方向に並ぶ複数の蓄電素子と、
前記複数の蓄電素子のうちの隣り合う二つの蓄電素子の間に配置される隣接部材と、
前記第一方向と直交する第二方向において前記複数の蓄電素子と対向する対向部材と、を備え、
前記対向部材は、
前記第一方向に延び且つ前記第一方向及び前記第二方向と直交する第三方向に間隔をあけて配置される一対の梁部材と、
前記一対の梁部材同士を連結する接触部材であって、前記隣接部材及び前記蓄電素子の少なくとも一方と直接又は間接に接触する接触部と、を有する。 The power storage device according to the present embodiment includes:
A plurality of power storage elements arranged in a first direction,
An adjacent member disposed between two adjacent power storage elements of the plurality of power storage elements,
A facing member facing the plurality of power storage elements in a second direction orthogonal to the first direction,
The facing member,
A pair of beam members extending in the first direction and arranged at intervals in a third direction orthogonal to the first direction and the second direction,
A contact member for connecting the pair of beam members to each other, the contact member being in direct or indirect contact with at least one of the adjacent member and the power storage element;

かかる構成によれば、隣接部材と蓄電素子とによって構成される系に対向部材の接触部が接触していることで該系の剛性が向上し、これにより、接触部が接触していない系に比べ、該系全体の共振周波数が高くなり、その結果、蓄電装置の設置（搭載）された装置や車両等の作動時の振動、即ち蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）が共振し難くなる。   According to this configuration, the rigidity of the system is improved by the contact portion of the opposing member being in contact with the system formed by the adjacent member and the power storage element. As a result, the resonance frequency of the entire system is increased, and as a result, the vibration during the operation of the device or the vehicle, etc., in which the power storage device is installed (mounted), that is, the vibration transmitted from the outside when the power storage device is used, is used. ) Becomes difficult to resonate.

この場合、
前記対向部材は、前記複数の蓄電素子の前記第二方向の両側にそれぞれ配置され且つ前記接触部をそれぞれ有してもよい。 in this case,
The opposed member may be arranged on both sides of the plurality of power storage elements in the second direction, and may have the contact portions.

このように、隣接部材と蓄電素子とによって構成される系が第二方向の両外側から接触部に接触されることで、該系全体の剛性がより向上するため、該系全体の共振周波数がより高くなる。これにより、蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）がより共振し難くなる。   As described above, since the system constituted by the adjacent member and the energy storage element is brought into contact with the contact portions from both outer sides in the second direction, the rigidity of the entire system is further improved. Higher. Accordingly, the power storage device (system) is less likely to resonate due to vibration transmitted from the outside when the power storage device is used.

また、前記蓄電装置は、
前記第一方向において前記複数の蓄電素子の両側に配置される一対の終端部材を備え、
前記対向部材は、前記一対の終端部材同士を接続すると共に、前記接触部を複数有し、
前記複数の接触部は、前記第一方向において前記一対の終端部材間を等間隔に区切る位置に配置されてもよい。 Further, the power storage device,
A pair of terminal members disposed on both sides of the plurality of power storage elements in the first direction,
The facing member connects the pair of terminal members and has a plurality of the contact portions,
The plurality of contact portions may be arranged at positions that divide the pair of end members at equal intervals in the first direction.

かかる構成によれば、一対の終端部材間を等間隔に区切る位置で複数の接触部が系に接触するため、第一方向において全体的に（即ち、第一方向の一部に偏らずに）バランスよく系の剛性を向上させることができ、これにより、系全体の剛性がより好適に向上する。その結果、蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）がより共振し難くなる。   According to such a configuration, since the plurality of contact portions contact the system at positions that divide the pair of terminal members at equal intervals, the entirety in the first direction (ie, without being biased to a part in the first direction). The rigidity of the system can be improved in a well-balanced manner, whereby the rigidity of the entire system is more appropriately improved. As a result, the power storage device (system) is less likely to resonate due to vibration transmitted from outside when the power storage device is used.

また、前記蓄電装置は、
前記第一方向において前記複数の蓄電素子の両側に配置される一対の終端部材を備え、
前記対向部材は、前記一対の終端部材同士を接続すると共に、前記接触部を複数有し、
前記隣接部材は、前記対向部材に固定される第一隣接部材を有し、
前記複数の接触部は、前記第一方向において前記終端部材と前記第一隣接部材との間を等間隔に区切る位置に配置されてもよい。 Further, the power storage device,
A pair of terminal members disposed on both sides of the plurality of power storage elements in the first direction,
The facing member connects the pair of terminal members and has a plurality of the contact portions,
The adjacent member has a first adjacent member fixed to the opposed member,
The plurality of contact portions may be disposed at positions that divide the end member and the first adjacent member at equal intervals in the first direction.

かかる構成によれば、第一方向において終端部材と第一隣接部材との間を等間隔に区切る位置で複数の接触部が系に接触するため、終端部材と第一隣接部材との間において第一方向の一部に偏らずにバランスよく系の剛性を向上させることができる。その結果、蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）が共振し難くなる。しかも、第一隣接部材が対向部材に固定されることで蓄電装置全体の剛性が向上しているため、蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）がさらに共振し難くなる。   According to such a configuration, since the plurality of contact portions contact the system at positions that divide the end member and the first adjacent member at equal intervals in the first direction, the first contact member is located between the end member and the first adjacent member. The rigidity of the system can be improved in a well-balanced manner without being partially biased in one direction. As a result, the power storage device (system) hardly resonates due to vibration transmitted from the outside when the power storage device is used. In addition, since the rigidity of the entire power storage device is improved by fixing the first adjacent member to the opposing member, the power storage device (system) is less likely to resonate due to vibration transmitted from outside when the power storage device is used.

また、前記蓄電装置において、
前記接触部は、前記隣接部材及び前記蓄電素子の少なくとも一方と接触することによって弾性変形していてもよい。 In the power storage device,
The contact portion may be elastically deformed by contacting at least one of the adjacent member and the power storage element.

かかる構成によれば、接触部の弾性変形によって生じた弾発力（弾性復帰力）によって系が第二方向に押圧されることで系の剛性をより効果的に向上させることができ、これにより、系全体の剛性がより向上する。その結果、蓄電装置の使用時に外部から伝わる振動によって該蓄電装置（系）がより共振し難くなる。   According to such a configuration, the rigidity of the system can be more effectively improved by the system being pressed in the second direction by the elastic force (elastic return force) generated by the elastic deformation of the contact portion. In addition, the rigidity of the entire system is further improved. As a result, the power storage device (system) is less likely to resonate due to vibration transmitted from outside when the power storage device is used.

また、前記蓄電装置において、
前記接触部は、該接触部と接触する前記隣接部材及び前記蓄電素子の少なくとも一方に向けて膨出するように湾曲してもよい。 In the power storage device,
The contact portion may be curved so as to bulge toward at least one of the adjacent member and the power storage element that is in contact with the contact portion.

このように、第三方向に延びる部位を湾曲させることで形成された接触部を系に押し当てるといった簡素な構成によって、弾発力を生じさせて系に押圧力を加える、即ち、系の剛性を効果的に向上させることができる。   As described above, by a simple configuration in which a contact portion formed by bending a portion extending in the third direction is pressed against the system, an elastic force is generated to apply a pressing force to the system, that is, the rigidity of the system is increased. Can be effectively improved.

また、前記蓄電装置では、
前記隣接部材は、前記第二方向に流体を流通させる流路を該隣接部材と隣り合う蓄電素子との間に形成し、
前記接触部は、前記隣接部材と隣り合う蓄電素子と接触してもよい。 In the power storage device,
The adjacent member forms a flow path for flowing the fluid in the second direction between the adjacent member and an adjacent power storage element,
The contact portion may contact a power storage element adjacent to the adjacent member.

かかる構成によれば、隣接部材と蓄電素子との間に流路が形成されるため、該流路に温度調整用の流体を流通させることで、蓄電素子の温度を調整することができる。しかも、接触部を蓄電素子に接触させることで、接触部は、流路の開口を避けた位置、即ち、流路の開口を塞がない位置で系に接触するため、流路を流れる流体の流通を妨げない。その結果、系の剛性を高めて蓄電装置の使用時の共振を防ぎつつ、蓄電素子の温度調整を効率よく行うことができる。   According to this configuration, since the flow path is formed between the adjacent member and the power storage element, the temperature of the power storage element can be adjusted by flowing a temperature adjusting fluid through the flow path. In addition, by bringing the contact portion into contact with the energy storage element, the contact portion contacts the system at a position avoiding the opening of the flow path, that is, at a position where the opening of the flow path is not closed, so that the fluid flowing through the flow path Does not hinder distribution. As a result, the temperature of the power storage element can be efficiently adjusted while increasing the rigidity of the system to prevent resonance when the power storage device is used.

前記蓄電装置は、
前記接触部と、前記蓄電素子との間に配置されるインシュレータを備え、
前記接触部は、前記インシュレータを介して前記蓄電素子に接触し、
前記インシュレータは、前記蓄電素子と接触することで該蓄電素子に対して前記第一方向において位置決めされると共に、該インシュレータに対する前記接触部の前記第一方向への移動を許容する形状を有してもよい。 The power storage device,
The contact portion, comprising an insulator disposed between the power storage element,
The contact portion contacts the power storage element via the insulator,
The insulator is positioned in the first direction with respect to the power storage element by contacting the power storage element, and has a shape that allows the contact portion to move with respect to the insulator in the first direction. Is also good.

かかる構成によれば、接触部と蓄電素子との間にインシュレータが配置されるため、蓄電装置に第一方向の加速度が生じたことで蓄電素子が対向部材に対して相対移動しても、蓄電素子が接触部と擦れて損傷することを防ぐことができる。しかも、インシュレータが、蓄電素子に位置決めされていてもインシュレータに対する接触部の第一方向への移動を許容しているため、蓄電装置に第一方向の加速度が生じたときに、インシュレータが蓄電素子の第一方向への移動（対向部材との相対移動）に追随して移動しても、インシュレータに対する接触部の相対移動（第一方向において蓄電素子の移動方向と反対側への移動）が許容されるため、インシュレータの損傷が抑えられる。   According to this configuration, since the insulator is arranged between the contact portion and the power storage element, even if the power storage device is relatively moved with respect to the facing member due to the acceleration in the first direction generated in the power storage device, the power storage device is not charged. The element can be prevented from rubbing against the contact portion and being damaged. In addition, since the insulator allows the contact portion to move in the first direction with respect to the insulator even when the insulator is positioned on the power storage element, when the acceleration in the first direction occurs in the power storage device, the insulator moves to the power storage element. Even if it moves following the movement in the first direction (relative movement with the opposing member), the relative movement of the contact portion with respect to the insulator (movement in the first direction on the side opposite to the movement direction of the power storage element) is allowed. Therefore, damage to the insulator is suppressed.

前記蓄電装置では、
前記蓄電素子は、該蓄電素子の外表面を構成する外装シートを有し、
前記インシュレータは、前記蓄電素子の外装シートに接触してもよい。 In the power storage device,
The power storage element has an exterior sheet constituting an outer surface of the power storage element,
The insulator may contact an exterior sheet of the power storage device.

かかる構成によれば、蓄電装置に第一方向の加速度が生じたことで蓄電素子が対向部材に対して相対移動しても、インシュレータが蓄電素子の第一方向への移動（対向部材との相対移動）に追随して移動するため、外装シートにおけるインシュレータの擦れ等による損傷を防ぐことができる。   According to this configuration, even if the power storage device moves relative to the opposing member due to the acceleration in the first direction generated in the power storage device, the insulator moves in the first direction (relative to the opposing member). (Movement), so that damage due to rubbing of the insulator on the exterior sheet can be prevented.

以上より、本実施形態によれば、複数の蓄電素子を備えていても使用時に外部から伝わる振動によって共振し難い蓄電装置を提供することができる。   As described above, according to the present embodiment, it is possible to provide a power storage device that is hardly resonated by vibration transmitted from the outside during use even when a plurality of power storage elements are provided.

図１は、本実施形態に係る蓄電装置の斜視図である。FIG. 1 is a perspective view of a power storage device according to the present embodiment. 図２は、前記蓄電装置の構成の一部を省略した分解斜視図である。FIG. 2 is an exploded perspective view in which a part of the configuration of the power storage device is omitted. 図３は、前記蓄電装置に用いられる蓄電素子の斜視図である。FIG. 3 is a perspective view of a power storage element used in the power storage device. 図４は、前記蓄電素子の分解斜視図である。FIG. 4 is an exploded perspective view of the power storage device. 図５は、前記蓄電装置に用いられる一対の対向部材の斜視図である。FIG. 5 is a perspective view of a pair of opposed members used for the power storage device. 図６は、図１のＶＩ−ＶＩ位置における一部を省略した断面図である。FIG. 6 is a cross-sectional view in which a part at a VI-VI position in FIG. 1 is omitted. 図７は、前記蓄電装置に用いられる一対のインシュレータの斜視図である。FIG. 7 is a perspective view of a pair of insulators used in the power storage device. 図８は、図６のＶＩＩＩ−ＶＩＩＩ位置における断面の模式図である。FIG. 8 is a schematic view of a cross section taken along the line VIII-VIII in FIG.

以下、本発明の一実施形態について、図１〜図８を参照しつつ説明する。尚、本実施形態の各構成部材（各構成要素）の名称は、本実施形態におけるものであり、背景技術における各構成部材（各構成要素）の名称と異なる場合がある。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The names of the components (components) in the present embodiment are those in the present embodiment, and may be different from the names of the components (components) in the background art.

蓄電装置は、図１及び図２に示すように、所定の方向に並ぶ複数の蓄電素子１０と、複数の蓄電素子１０のうちの前記所定の方向の途中位置にある蓄電素子１０と隣り合う少なくとも一つの隣接部材２と、前記所定の方向と直交する方向において複数の蓄電素子１０と対向する対向部材３１と、備える。この対向部材３１は、複数の蓄電素子１０と少なくとも一つの隣接部材２とをひとまとめに保持する保持部材３に含まれる。即ち、蓄電装置１は、保持部材３を備える。また、本実施形態の蓄電装置１は、複数の蓄電素子１０と保持部材３との間に配置されるインシュレータ４も備える。   As shown in FIGS. 1 and 2, the power storage device includes a plurality of power storage elements 10 arranged in a predetermined direction, and at least one of the plurality of power storage elements 10 adjacent to the power storage element 10 at an intermediate position in the predetermined direction. It includes one adjacent member 2 and an opposing member 31 opposing the plurality of power storage elements 10 in a direction orthogonal to the predetermined direction. The facing member 31 is included in a holding member 3 that holds the plurality of power storage elements 10 and at least one adjacent member 2 collectively. That is, the power storage device 1 includes the holding member 3. Further, power storage device 1 of the present embodiment also includes insulator 4 arranged between a plurality of power storage elements 10 and holding member 3.

複数の蓄電素子１０のそれぞれは、図３及び図４にも示すように、正極及び負極を含む電極体１１と、電極体１１を収容するケース１２と、ケース１２の外面に配置される一対の外部端子１３と、ケース１２の表面の少なくとも一部を覆う外装シート１４と、を備える。また、複数の蓄電素子１０のそれぞれは、電極体１１とケース１２との間を絶縁する絶縁部材１５も備える。   As shown in FIGS. 3 and 4, each of the plurality of power storage elements 10 includes an electrode body 11 including a positive electrode and a negative electrode, a case 12 that accommodates the electrode body 11, and a pair of An external terminal 13 and an exterior sheet 14 that covers at least a part of the surface of the case 12 are provided. In addition, each of the plurality of power storage elements 10 also includes an insulating member 15 that insulates between the electrode body 11 and the case 12.

ケース１２は、開口を有するケース本体１２０と、ケース本体１２０の開口を塞ぐ蓋板１２１とを有する。本実施形態のケース１２は、直方体形状である。   The case 12 includes a case main body 120 having an opening, and a cover plate 121 for closing the opening of the case main body 120. The case 12 of the present embodiment has a rectangular parallelepiped shape.

ケース本体１２０は、長方形の板状の閉塞部１２３と、閉塞部１２３の周縁に接続された筒状の胴部１２４と、を有する。以下の説明では、閉塞部１２３の短辺方向（即ち、蓄電素子１０が並ぶ方向）を直交座標系におけるＸ軸方向（第一方向）とし、閉塞部１２３の長辺方向を直交座標系におけるＹ軸方向（第二方向）とし、閉塞部１２３の法線方向を直交座標系におけるＺ軸方向（第三方向）とする。これに伴い、各図面に、Ｘ軸方向、Ｙ軸方向、及びＺ軸方向のそれぞれに対応する直交座標軸を補助的に図示する。   The case main body 120 has a rectangular plate-shaped closing portion 123 and a cylindrical body 124 connected to the periphery of the closing portion 123. In the following description, the short side direction of the closed portion 123 (that is, the direction in which the power storage elements 10 are arranged) is defined as the X-axis direction (first direction) in the rectangular coordinate system, and the long side direction of the closed portion 123 is defined as Y in the rectangular coordinate system. An axial direction (second direction) is defined, and a normal direction of the closed portion 123 is defined as a Z-axis direction (third direction) in a rectangular coordinate system. Accompanying this, in each drawing, orthogonal coordinate axes respectively corresponding to the X-axis direction, the Y-axis direction, and the Z-axis direction are additionally illustrated.

胴部１２４は、閉塞部１２３の輪郭に沿った角筒状、即ち、扁平な角筒状である。具体的に、胴部１２４は、閉塞部１２３の周縁における長辺から延びる一対の長壁部１２５と、閉塞部１２３の周縁における短辺から延びる一対の短壁部１２６と、を有する。この胴部１２４の一端は、閉塞部１２３によって閉塞され、他端は、開口する。即ち、ケース本体１２０は、扁平な有底角筒形状を有する。   The body 124 has a rectangular tube shape along the contour of the closing portion 123, that is, a flat rectangular tube shape. Specifically, the trunk portion 124 has a pair of long wall portions 125 extending from the long side at the periphery of the closing portion 123 and a pair of short wall portions 126 extending from the short side at the periphery of the closing portion 123. One end of the body portion 124 is closed by the closing portion 123, and the other end is open. That is, the case main body 120 has a flat bottomed rectangular tube shape.

蓋板１２１は、ケース本体１２０の開口を塞ぐ板状の部材である。具体的に、蓋板１２１は、法線方向から見て、ケース本体１２０の開口周縁部に対応した輪郭を有する。本実施形態の蓋板１２１には、一対の外部端子１３が電極体１１の各極（正極、負極）に電気的に接続された状態で取り付けられる。   The cover plate 121 is a plate-shaped member that closes the opening of the case main body 120. Specifically, the cover plate 121 has a contour corresponding to the peripheral edge of the opening of the case main body 120 when viewed from the normal direction. The pair of external terminals 13 are attached to the cover plate 121 of the present embodiment in a state where the pair of external terminals 13 are electrically connected to the respective electrodes (positive electrode, negative electrode) of the electrode body 11.

以上のケース１２は、電極体１１が内部に収容された状態で、蓋板１２１の周縁部がケース本体１２０の開口周縁部に重ねられて該ケース本体１２０の開口が塞がれ、この状態の蓋板１２１とケース本体１２０との境界部が溶接されることで構成される。   In the case 12 described above, in a state where the electrode body 11 is housed inside, the peripheral edge of the cover plate 121 is overlapped with the peripheral edge of the opening of the case main body 120, and the opening of the case main body 120 is closed. The boundary between the cover plate 121 and the case body 120 is welded.

外装シート１４は、絶縁性を有し、ケース１２の表面を覆う。即ち、外装シート１４は、蓄電素子１０の外表面の少なくとも一部を構成する。本実施形態の外装シート１４は、ポリプロピレンによって形成されている。この外装シート１４は、胴部１２４の表面の略全域（詳しくは、蓋板１２１側の端部と閉塞部１２３側の端部とを除いた領域）を覆っている。尚、外装シート１４は、胴部１２４の一部を覆う構成でもよく、蓋板１２１や閉塞部１２３のみを覆う構成等であってもよい。   The exterior sheet 14 has insulating properties and covers the surface of the case 12. That is, the exterior sheet 14 forms at least a part of the outer surface of the power storage device 10. The exterior sheet 14 of the present embodiment is formed of polypropylene. The exterior sheet 14 covers substantially the entire area of the surface of the body 124 (specifically, the area excluding the end on the cover plate 121 side and the end on the closing section 123 side). The exterior sheet 14 may be configured to cover a part of the trunk 124, or may be configured to cover only the cover plate 121 or the closing portion 123.

本実施形態の蓄電装置１では、以上のように構成される蓄電素子１０が複数配置されている。具体的には、複数の蓄電素子１０が、胴部１２４の幅広の壁部（長壁部１２５）同士を対向させるように並んでいる。   In power storage device 1 of the present embodiment, a plurality of power storage elements 10 configured as described above are arranged. Specifically, the plurality of power storage elements 10 are arranged so that the wide wall portions (long wall portions 125) of body portion 124 face each other.

隣接部材２は、Ｘ軸方向に並ぶ蓄電素子１０の間、又は蓄電素子１０と該蓄電素子１０に対してＸ軸方向に並ぶ部材（本実施形態の例では、保持部材３の一部）との間に配置される。この隣接部材２は、図１及び図２に示すように、複数種の隣接部材を含む。本実施形態の隣接部材２は、蓄電装置１のＸ軸方向の途中位置に配置される蓄電素子１０と隣り合う第一隣接部材２１と、Ｘ軸方向に並ぶ複数の蓄電素子１０のうちの最も端にある蓄電素子１０と隣り合う第二隣接部材２２と、第一隣接部材２１と第二隣接部材２２との間にある蓄電素子１０と隣り合う第三隣接部材（隣接部材）２３と、を有する。   The adjacent member 2 is located between the energy storage elements 10 arranged in the X-axis direction or between the energy storage element 10 and a member arranged in the X-axis direction with respect to the energy storage element 10 (a part of the holding member 3 in the example of the present embodiment). Placed between. As shown in FIGS. 1 and 2, the adjacent member 2 includes a plurality of types of adjacent members. The adjacent member 2 of the present embodiment includes a first adjacent member 21 adjacent to the power storage element 10 arranged at an intermediate position of the power storage device 1 in the X-axis direction, and a most adjacent one of the plurality of power storage elements 10 arranged in the X-axis direction. A second adjacent member 22 adjacent to the power storage element 10 at the end, and a third adjacent member (adjacent member) 23 adjacent to the power storage element 10 between the first adjacent member 21 and the second adjacent member 22. Have.

第一隣接部材２１は、Ｘ軸方向に隣り合う蓄電素子１０の間に配置される。これにより、第一隣接部材２１を介してＸ軸方向に並ぶ蓄電素子１０の間に、所定の間隔（沿面距離等）が確保される。また、第一隣接部材２１は、保持部材３に連結（固定）されている。   The first adjacent member 21 is arranged between the power storage elements 10 adjacent in the X-axis direction. Thereby, a predetermined interval (such as a creepage distance) is secured between the power storage elements 10 arranged in the X-axis direction via the first adjacent member 21. The first adjacent member 21 is connected (fixed) to the holding member 3.

具体的に、第一隣接部材２１は、蓄電素子１０（ケース本体１２０）と隣り合う本体部（以下、「第一本体部」と称する。）２１１と、第一本体部２１１と隣り合う蓄電素子１０の該第一本体部２１１に対する移動を規制する規制部（以下、「第一規制部」と称する。）２１２と、を有する。また、第一隣接部材２１は、保持部材３と係合する軸部２１３を備える。   Specifically, the first adjacent member 21 includes a main body portion (hereinafter, referred to as a “first main body portion”) 211 adjacent to the power storage device 10 (the case main body 120) and a power storage device adjacent to the first main body portion 211. And a restricting portion (hereinafter, referred to as a “first restricting portion”) 212 that restricts movement of the first main portion 211 with respect to the first main body portion 211. Further, the first adjacent member 21 includes a shaft portion 213 that engages with the holding member 3.

第一本体部２１１は、Ｘ軸方向から見て隣り合う蓄電素子１０（ケース１２）に対応する長方形の輪郭を具備し、保持部材３に第一本体部２１１を固定（連結）するための連結部２１１１を有する。また、第一本体部２１１は、Ｘ軸方向に隣り合う蓄電素子１０との間に温度調整用の流体（本実施形態の例では空気）を流通させる流路２１５を形成する。詳しくは、第一本体部２１１では、隣り合う蓄電素子１０に向けて（Ｘ軸方向に）突出すると共にＹ軸方向に延びる複数の凸部２１６が、Ｚ軸方向に間隔をあけて並ぶ。これら複数の凸部２１６の先端（突出方向の先端）のそれぞれが隣り合う蓄電素子１０に接触することにより、第一隣接部材２１と蓄電素子１０との間にＹ軸方向に延びる流路２１５が形成される。   The first main body 211 has a rectangular outline corresponding to the adjacent power storage element 10 (case 12) as viewed from the X-axis direction, and is connected for fixing (connecting) the first main body 211 to the holding member 3. It has a part 2111. In addition, the first main body 211 forms a flow path 215 for flowing a fluid for temperature adjustment (air in the example of the present embodiment) between the power storage elements 10 adjacent in the X-axis direction. More specifically, in the first main body portion 211, a plurality of convex portions 216 protruding (in the X-axis direction) toward the adjacent power storage elements 10 and extending in the Y-axis direction are arranged at intervals in the Z-axis direction. When each of the tips (tips in the protruding direction) of the plurality of protrusions 216 comes into contact with the adjacent power storage element 10, a flow path 215 extending in the Y-axis direction between the first adjacent member 21 and the power storage element 10 is formed. It is formed.

連結部２１１１は、第一本体部２１１のＹ軸方向の端部に設けられている。本実施形態の連結部２１１１は、第一本体部２１１のＹ軸方向の両端部にそれぞれ設けられている。この連結部２１１１は、ボルトＢが保持部材３を貫通した状態でねじ込まれる部位である。蓄電装置１では、このボルトＢの連結部２１１１へのねじ込みにより、第一本体部２１１（第一隣接部材２１）と保持部材３とが連結される。   The connecting portion 2111 is provided at an end of the first main body 211 in the Y-axis direction. The connecting portions 2111 of the present embodiment are provided at both ends of the first main body 211 in the Y-axis direction. The connecting portion 2111 is a portion into which the bolt B is screwed while penetrating the holding member 3. In power storage device 1, first main body 211 (first adjacent member 21) and holding member 3 are connected by screwing bolt B into connecting portion 2111.

第一規制部２１２は、第一本体部２１１からＸ軸方向に延び、第一本体部２１１と隣り合う蓄電素子１０（詳しくはケース１２）とＹ−Ｚ面（Ｙ軸とＺ軸とを含む面）方向の外側から接触することによって該蓄電素子１０の第一本体部２１１に対するＹ−Ｚ面方向への相対移動を規制する。この第一規制部２１２は、第一本体部２１１の少なくとも各角部からＸ軸方向に延び、第一本体部２１１と隣り合う蓄電素子１０（ケース１２）の角部にＹ−Ｚ面方向の外側から接触する。   The first regulating portion 212 extends in the X-axis direction from the first main body portion 211, and includes the power storage element 10 (specifically, the case 12) adjacent to the first main body portion 211 and the YZ plane (including the Y axis and the Z axis). By contacting the power storage element 10 from the outside in the (plane) direction, the relative movement of the power storage element 10 in the YZ plane direction with respect to the first main body 211 is regulated. The first regulating portion 212 extends in the X-axis direction from at least each corner of the first main body 211, and is provided at the corner of the power storage element 10 (case 12) adjacent to the first main body 211 in the YZ plane direction. Contact from outside.

このように第一本体部２１１の各角部から延びる第一規制部２１２が該第一本体部２１１と隣り合う蓄電素子１０の対応する角部に対してＹ−Ｚ面方向の外側からそれぞれ接触することで、隣り合う蓄電素子１０の第一本体部２１１（第一隣接部材２１）に対するＹ−Ｚ面方向への移動が規制される。本実施形態の第一隣接部材２１では、第一規制部２１２が第一本体部２１１のＸ軸方向の両側にそれぞれ延びているため、第一隣接部材２１は、第一本体部２１１のＸ軸方向の一方側において隣り合う蓄電素子１０のＹ−Ｚ面方向の移動を規制すると共に、他方側において隣り合う蓄電素子１０のＹ−Ｚ面方向の移動を規制する。   As described above, the first restricting portions 212 extending from the corners of the first main body 211 contact the corresponding corners of the power storage element 10 adjacent to the first main body 211 from the outside in the YZ plane direction. By doing so, the movement of the adjacent power storage element 10 with respect to the first main body 211 (first adjacent member 21) in the YZ plane direction is restricted. In the first adjacent member 21 of the present embodiment, since the first restricting portions 212 extend on both sides in the X-axis direction of the first main body portion 211, the first adjacent member 21 In one direction, the movement of the adjacent storage element 10 in the YZ plane direction is restricted, and on the other side, the movement of the adjacent storage element 10 in the YZ plane direction is restricted.

軸部２１３は、第一本体部２１１のＹ軸方向の端から外側に向けて延び、保持部材３と係合する。本実施形態の軸部２１３は、第一本体部２１１のＹ軸方向の両端から外側に向けてそれぞれ延び、保持部材３において該軸部２１３と対応する部位に設けられた貫通孔３２２２に挿通されている。   The shaft portion 213 extends outward from an end of the first main body portion 211 in the Y-axis direction, and engages with the holding member 3. The shaft portion 213 of this embodiment extends outward from both ends in the Y-axis direction of the first main body portion 211, and is inserted into a through hole 3222 provided in a portion of the holding member 3 corresponding to the shaft portion 213. ing.

第二隣接部材２２は、Ｘ軸方向において蓄電素子１０と保持部材３との間に配置される。これにより、第二隣接部材２２を介してＸ軸方向に並ぶ蓄電素子１０と保持部材３との間に、所定の間隔（沿面距離等）が確保される。   The second adjacent member 22 is arranged between the electric storage element 10 and the holding member 3 in the X-axis direction. Thereby, a predetermined interval (such as a creepage distance) is secured between the power storage elements 10 arranged in the X-axis direction and the holding member 3 via the second adjacent member 22.

具体的に、第二隣接部材２２は、蓄電素子１０と保持部材３との間において該蓄電素子１０（ケース本体１２０）と隣り合う本体部（以下、「第二本体部」と称する。）２２１と、第二本体部２２１と隣り合う蓄電素子１０の該第二本体部２２１に対する移動を規制する規制部（以下、「第二規制部」と称する。）２２２と、を有する。   Specifically, the second adjacent member 22 has a main body (hereinafter, referred to as a “second main body”) 221 adjacent to the power storage element 10 (the case main body 120) between the power storage element 10 and the holding member 3. And a regulating unit (hereinafter, referred to as a “second regulating unit”) 222 that regulates movement of the power storage element 10 adjacent to the second main body 221 with respect to the second main body 221.

第二本体部２２１は、Ｘ軸方向から見て隣り合う蓄電素子１０（ケース１２）に対応する矩形の輪郭を有する。また、第二本体部２２１は、Ｘ軸方向に隣り合う蓄電素子１０との間に温度調整用の流体（本実施形態の例では空気）を流通させる流路２２５を形成する。詳しくは、第二本体部２２１では、隣り合う蓄電素子１０に向けて（Ｘ軸方向に）突出すると共にＹ軸方向に延びる複数の凸部２２６が、Ｚ軸方向に間隔をあけて並ぶ。これにより、複数の凸部２２６の先端（突出方向の先端）のそれぞれが隣り合う蓄電素子１０と接触することで、第二隣接部材２２と蓄電素子１０との間にＹ軸方向に延びる流路２２５が形成される。   The second main body 221 has a rectangular outline corresponding to the adjacent power storage element 10 (case 12) when viewed from the X-axis direction. In addition, the second main body 221 forms a flow path 225 for flowing a fluid for temperature adjustment (air in the example of the present embodiment) between the power storage elements 10 adjacent in the X-axis direction. More specifically, in the second main body 221, a plurality of protrusions 226 projecting toward the adjacent power storage elements 10 (in the X-axis direction) and extending in the Y-axis direction are arranged at intervals in the Z-axis direction. With this, each of the tips (tips in the protruding direction) of the plurality of protrusions 226 comes into contact with the adjacent power storage element 10, so that the flow path extending in the Y-axis direction between the second adjacent member 22 and the power storage element 10. 225 are formed.

第二規制部２２２は、第二本体部２２１からＸ軸方向に延び、第二本体部２２１と隣り合う蓄電素子１０（詳しくはケース１２）とＹ−Ｚ面方向の外側から接触することによって該蓄電素子１０の第二本体部２２１に対するＹ−Ｚ面方向への相対移動を規制する。この第二規制部２２２は、第二本体部２２１の少なくとも各角部からＸ軸方向に延び、第二本体部２２１と隣り合う蓄電素子１０（ケース１２）の角部にＹ−Ｚ面方向の外側から接触する。   The second restricting portion 222 extends in the X-axis direction from the second main body portion 221, and contacts the power storage element 10 (specifically, the case 12) adjacent to the second main body portion 221 from the outside in the YZ plane direction. The relative movement of the electric storage element 10 in the YZ plane direction with respect to the second main body 221 is restricted. The second regulating portion 222 extends in the X-axis direction from at least each corner of the second main body 221, and is provided at a corner of the power storage element 10 (case 12) adjacent to the second main body 221 in the YZ plane direction. Contact from outside.

このように第二本体部２２１の各角部から延びる第二規制部２２２が該第二本体部２２１と隣り合う蓄電素子１０の対応する角部に対してＹ−Ｚ面方向の外側からそれぞれ接触することで、隣り合う蓄電素子１０の第二本体部２２１（第二隣接部材２２）に対するＹ−Ｚ面方向への移動が規制される。本実施形態の第二隣接部材２２では、第二規制部２２２が第二本体部２２１のＸ軸方向の一方側（又は他方側）に延びている。このため、第二隣接部材２２は、第二本体部２２１のＸ軸方向の一方側（又は他方側）において隣り合う蓄電素子１０のＹ−Ｚ面方向の移動を規制する。   As described above, the second restricting portions 222 extending from the corners of the second main body 221 make contact with the corresponding corners of the power storage element 10 adjacent to the second main body 221 from the outside in the YZ plane direction. By doing so, the movement of the adjacent power storage element 10 in the YZ plane direction with respect to the second main body part 221 (the second adjacent member 22) is regulated. In the second adjacent member 22 of the present embodiment, the second regulating portion 222 extends to one side (or the other side) of the second main body 221 in the X-axis direction. For this reason, the second adjacent member 22 regulates the movement of the adjacent storage element 10 in the YZ plane direction on one side (or the other side) of the second main body 221 in the X-axis direction.

第三隣接部材２３は、第一隣接部材２１と第二隣接部材２２との間において、Ｘ軸方向に隣り合う蓄電素子１０の間に配置される。これにより、第三隣接部材２３を介してＸ軸方向に並ぶ蓄電素子１０の間に、所定の間隔（沿面距離等）が確保される。   The third adjacent member 23 is disposed between the first adjacent member 21 and the second adjacent member 22 and between the power storage elements 10 adjacent in the X-axis direction. Thereby, a predetermined interval (such as a creepage distance) is secured between the power storage elements 10 arranged in the X-axis direction via the third adjacent member 23.

具体的に、第三隣接部材２３は、蓄電素子１０（ケース本体１２０）と隣り合う本体部（以下、「第三本体部」と称する。）２３１と、第三本体部２３１と隣り合う蓄電素子１０の該第三本体部２３１に対する移動を規制する規制部（以下、「第三規制部」と称する。）２３２と、を有する。   Specifically, the third adjacent member 23 includes a main body portion (hereinafter, referred to as a “third main body portion”) 231 adjacent to the power storage device 10 (the case main body 120) and a power storage device adjacent to the third main body portion 231. And a restricting portion (hereinafter, referred to as a “third restricting portion”) 232 that restricts movement of the tenth portion 10 with respect to the third main body portion 231.

第三本体部２３１は、Ｘ軸方向から見て隣り合う蓄電素子１０（ケース１２）に対応する矩形の輪郭を有する。また、第三本体部２３１は、Ｘ軸方向に隣り合う蓄電素子１０との間に温度調整用の流体（本実施形態の例では空気）を流通させる流路２３５を形成する。詳しくは、第三本体部２３１は、矩形波形の断面形状を有する。これにより、第三本体部２３１が隣り合う蓄電素子１０と接触することで、該蓄電素子１０との間にＹ軸方向に延びる流路２３５が形成される。   The third main body 231 has a rectangular outline corresponding to the adjacent power storage element 10 (case 12) when viewed from the X-axis direction. In addition, the third main body 231 forms a flow path 235 for flowing a fluid for temperature adjustment (air in the example of the present embodiment) between the power storage elements 10 adjacent in the X-axis direction. More specifically, the third main body 231 has a rectangular waveform cross-sectional shape. Thereby, the third main body portion 231 comes into contact with the adjacent power storage element 10 to form a flow path 235 extending in the Y-axis direction between the power storage element 10 and the third main body part 231.

第三規制部２３２は、第三本体部２３１からＸ軸方向に延び、第三本体部２３１と隣り合う蓄電素子１０（詳しくはケース１２）とＹ−Ｚ面方向の外側から接触することによって該蓄電素子１０の第三本体部２３１に対するＹ−Ｚ面方向への相対移動を規制する。この第三規制部２３２は、第三本体部２３１の少なくとも各角部からＸ軸方向に延び、第三本体部２３１と隣り合う蓄電素子１０（ケース１２）の角部にＹ−Ｚ面方向の外側から接触する。   The third regulating portion 232 extends in the X-axis direction from the third main body portion 231, and contacts the power storage element 10 (specifically, the case 12) adjacent to the third main body portion 231 from the outside in the YZ plane direction. The relative movement of the electric storage element 10 in the YZ plane direction with respect to the third main body part 231 is restricted. The third restricting portion 232 extends in the X-axis direction from at least each corner of the third main body 231, and is provided at the corner of the power storage element 10 (case 12) adjacent to the third main body 231 in the YZ plane direction. Contact from outside.

このように第三本体部２３１の各角部から延びる第三規制部２３２が該第三本体部２３１と隣り合う蓄電素子１０の対応する角部に対してＹ−Ｚ面方向の外側からそれぞれ接触することで、隣り合う蓄電素子１０の第三本体部２３１（第三隣接部材２３）に対するＹ−Ｚ面方向への移動が規制される。本実施形態の第三隣接部材２３では、第三規制部２３２が第三本体部２３１のＸ軸方向の両側にそれぞれ延びているため、第三隣接部材２３は、第三本体部２３１のＸ軸方向の一方側において隣り合う蓄電素子１０のＹ−Ｚ面方向の移動を規制すると共に、他方側において隣り合う蓄電素子１０のＹ−Ｚ面方向の移動を規制する。   In this way, the third regulating portions 232 extending from the corners of the third main body 231 contact the corresponding corners of the storage element 10 adjacent to the third main body 231 from the outside in the YZ plane direction. By doing so, the movement of the adjacent power storage element 10 with respect to the third main body part 231 (third adjacent member 23) in the YZ plane direction is restricted. In the third adjacent member 23 of the present embodiment, the third regulating member 232 extends on both sides of the third main body 231 in the X-axis direction. In one direction, the movement of the adjacent storage element 10 in the YZ plane direction is restricted, and on the other side, the movement of the adjacent storage element 10 in the YZ plane direction is restricted.

保持部材３は、図１に示すように、複数の蓄電素子１０と複数の隣接部材２との周囲を囲むことで、これら複数の蓄電素子１０と複数の隣接部材２とをひとまとめに保持する。この保持部材３は、導電性を有する部材によって構成される。具体的に、保持部材３は、図２にも示すように、Ｘ軸方向において複数の蓄電素子１０が間に位置するように配置される一対の終端部材３０と、複数の蓄電素子１０とＹ軸方向に対向した状態で一対の終端部材３０同士を接続する対向部材３１と、を備える。本実施形態の蓄電装置１では、一対の終端部材３０が、Ｘ軸方向の端に配置された蓄電素子１０との間に第二隣接部材２２を挟み込んだ状態で配置され、一対の対向部材３１がＸ軸方向に並ぶ複数の蓄電素子１０のＹ軸方向の両側に配置される。   As illustrated in FIG. 1, the holding member 3 surrounds the plurality of power storage elements 10 and the plurality of adjacent members 2 to hold the plurality of power storage elements 10 and the plurality of adjacent members 2 together. The holding member 3 is made of a conductive member. Specifically, as shown in FIG. 2, the holding member 3 includes a pair of terminal members 30 arranged so that a plurality of power storage elements 10 are located therebetween in the X-axis direction, and a plurality of power storage elements 10 and Y And an opposing member 31 that connects the pair of terminal members 30 in a state where they face each other in the axial direction. In the power storage device 1 of the present embodiment, the pair of terminal members 30 are disposed with the second adjacent member 22 sandwiched between the pair of terminal members 30 and the power storage element 10 disposed at the end in the X-axis direction. Are arranged on both sides in the Y-axis direction of the plurality of power storage elements 10 arranged in the X-axis direction.

一対の終端部材３０のそれぞれは、Ｙ−Ｚ面方向に広がる。具体的に、一対の終端部材３０のそれぞれは、蓄電素子１０と対応する輪郭（本実施形態では矩形状の輪郭）を有する本体３００と、本体３００から第二隣接部材２２の第二本体部２２１に向けて突出し且つ該第二隣接部材２２に接触する圧接部３０１と、を有する。   Each of the pair of terminal members 30 extends in the YZ plane direction. Specifically, each of the pair of terminal members 30 includes a main body 300 having an outline (a rectangular outline in this embodiment) corresponding to the power storage element 10, and a second main body 221 of the second adjacent member 22 from the main body 300. And a pressure contact portion 301 projecting toward the second adjacent member 22.

一対の対向部材３１のそれぞれは、ケース１２の一つの面を構成する短壁部１２６と対向する。この対向部材３１は、図５にも示すように、短壁部１２６に沿う本体３２と、本体３２からケース１２の閉塞部１２３に沿って延びる第一延設部３３と、を有する。また、本実施形態の対向部材３１は、本体３２からケース１２の蓋板１２１に沿って延びる第二延設部３４と、本体３２を終端部材３０に接続する一対の接続片３５と、も有する。   Each of the pair of opposing members 31 opposes the short wall portion 126 that forms one surface of the case 12. As shown in FIG. 5, the facing member 31 has a main body 32 along the short wall portion 126 and a first extension portion 33 extending from the main body 32 along the closing portion 123 of the case 12. Further, the facing member 31 of the present embodiment also has a second extending portion 34 extending from the main body 32 along the cover plate 121 of the case 12, and a pair of connecting pieces 35 for connecting the main body 32 to the terminal member 30. .

本体３２は、第三隣接部材２３及び該第三隣接部材２３によってＹ−Ｚ面方向の移動を規制されている蓄電素子１０の少なくとも一方と接触している接触部３２５を有する。本実施形態の本体３２は、Ｘ−Ｚ面（Ｘ軸及びＹ軸を含む面）方向に沿った板状の部位である。具体的に、本体３２は、Ｘ軸方向に延び且つＺ軸方向に間隔をあけて配置される一対の梁部３２０と、一対の梁部３２０の端部同士を連結する一対の第一連結部３２１と、一対の第一連結部３２１の間で一対の梁部３２０に接続される少なくとも一つの接触部３２５と、を有する。また、本実施形態の本体３２は、Ｘ軸方向における途中位置（本実施形態の例では、第一隣接部材２１とＹ軸方向に重なる位置）において一対の梁部３２０同士を連結する第二連結部３２２と、第一連結部３２１と第二連結部３２２との間で一対の梁部３２０を連結する少なくとも一つの第三連結部３２３と、を有する。   The main body 32 includes a third adjacent member 23 and a contact portion 325 that is in contact with at least one of the power storage elements 10 whose movement in the YZ plane direction is regulated by the third adjacent member 23. The main body 32 of the present embodiment is a plate-shaped portion along the XZ plane (a plane including the X axis and the Y axis). Specifically, the main body 32 includes a pair of beam portions 320 extending in the X-axis direction and arranged at an interval in the Z-axis direction, and a pair of first connection portions connecting ends of the pair of beam portions 320. 321, and at least one contact portion 325 connected to the pair of beam portions 320 between the pair of first connection portions 321. Further, the main body 32 of the present embodiment connects the pair of beam portions 320 to each other at an intermediate position in the X-axis direction (a position overlapping with the first adjacent member 21 in the Y-axis direction in the example of the present embodiment). A portion 322 and at least one third connection portion 323 that connects the pair of beam portions 320 between the first connection portion 321 and the second connection portion 322.

一対の梁部３２０のそれぞれは、Ｘ軸方向に並ぶ複数の蓄電素子１０（ケース１２）の短壁部１２６におけるＺ軸方向の端部に沿って延びる。即ち、一対の梁部３２０のうちの一方は、複数の蓄電素子１０のそれぞれの短壁部１２６の蓋板１２１側の端部に沿って延び、一対の梁部３２０のうちの他方は、複数の蓄電素子１０のそれぞれの短壁部１２６の閉塞部１２３側の端部に沿って延びている。   Each of the pair of beam portions 320 extends along the end in the Z-axis direction of the short wall portion 126 of the plurality of power storage devices 10 (case 12) arranged in the X-axis direction. That is, one of the pair of beam portions 320 extends along the end of the short wall portion 126 of the plurality of power storage elements 10 on the side of the lid plate 121, and the other of the pair of beam portions 320 Extend along the end of the short wall portion 126 on the closed portion 123 side of the power storage device 10.

一対の第一連結部３２１のそれぞれは、終端部材３０とＹ軸方向に重なる位置においてＺ軸方向に延びる。これにより、一対の梁部３２０と一対の第一連結部３２１とは、矩形の枠状となる。   Each of the pair of first connecting portions 321 extends in the Z-axis direction at a position overlapping the terminal member 30 in the Y-axis direction. As a result, the pair of beam portions 320 and the pair of first connection portions 321 have a rectangular frame shape.

接触部３２５は、第三隣接部材２３、及び第三隣接部材２３によって移動を規制されている蓄電素子１０の少なくとも一方と接触することによって弾性変形している。具体的に、接触部３２５は、図６にも示すように、一対の梁部３２０のうちの一方の梁部３２０から他方の梁部３２０までＺ軸方向に延びると共に、該接触部３２５を含む対向部材３１が対向する蓄電素子１０側に膨出するように湾曲している。この接触部３２５のＺ軸方向の中央部は、第三隣接部材２３、及び該第三隣接部材２３によって移動を規制されている蓄電素子１０の少なくとも一方に押し付けられている。本実施形態の接触部３２５は、第三隣接部材２３によって移動を規制されている蓄電素子１０の短壁部１２６に接触している。即ち、接触部３２５は、第三隣接部材２３と蓄電素子１０との間に形成される流路２３５の開口を避けた状態で蓄電素子１０に接触している。本実施形態の蓄電装置１では、一対の対向部材３１において、一方の対向部材３１の接触部３２５と、他方の対向部材３１の接触部３２５とが、対応する位置に配置されている（即ち、Ｙ軸方向に互いに向かい合った状態で共通の蓄電素子１０に接触する）ことが好ましい。   The contact portion 325 is elastically deformed by contacting at least one of the third adjacent member 23 and the power storage element 10 whose movement is regulated by the third adjacent member 23. Specifically, as shown in FIG. 6, the contact portion 325 extends in the Z-axis direction from one beam portion 320 of the pair of beam portions 320 to the other beam portion 320, and includes the contact portion 325. The opposing member 31 is curved so as to swell toward the opposing power storage element 10. The center of the contact portion 325 in the Z-axis direction is pressed against at least one of the third adjacent member 23 and the power storage element 10 whose movement is regulated by the third adjacent member 23. The contact portion 325 of the present embodiment is in contact with the short wall portion 126 of the power storage device 10 whose movement is regulated by the third adjacent member 23. That is, the contact portion 325 is in contact with the power storage element 10 in a state of avoiding the opening of the flow path 235 formed between the third adjacent member 23 and the power storage element 10. In the power storage device 1 of the present embodiment, in the pair of opposing members 31, the contact portion 325 of one opposing member 31 and the contact portion 325 of the other opposing member 31 are arranged at corresponding positions (that is, the corresponding positions). It is preferable to contact the common power storage element 10 while facing each other in the Y-axis direction).

また、対向部材３１（本体３２）は、複数（本実施形態の例では四つ）の接触部３２５を有する。この複数の接触部３２５は、Ｘ軸方向において一対の終端部材３０の間を等間隔に区切る位置、又はＸ軸方向において終端部材３０と第一隣接部材２１（対向部材３１に固定された隣接部材２）との間を等間隔に区切る位置に配置される。本実施形態の対向部材３１では、複数の接触部３２５は、Ｘ軸方向において終端部材３０と第一隣接部材２１との間を等間隔に区切る位置に配置されている（図１参照）。   The facing member 31 (the main body 32) has a plurality of (four in the example of the present embodiment) contact portions 325. The plurality of contact portions 325 are located at positions that divide the pair of terminal members 30 at equal intervals in the X-axis direction, or the terminal members 30 and the first adjacent member 21 (the adjacent member fixed to the opposing member 31) in the X-axis direction. 2) is disposed at a position that divides the space between them at equal intervals. In the facing member 31 of the present embodiment, the plurality of contact portions 325 are arranged at positions that divide the end member 30 and the first adjacent member 21 at equal intervals in the X-axis direction (see FIG. 1).

第二連結部３２２は、Ｚ軸方向に延び、第一隣接部材２１の連結部２１１１及び軸部２１３と対応する位置（具体的には、Ｙ軸方向に重なる位置）に厚さ方向に貫通する貫通孔３２２１、３２２２を有する。貫通孔３２２１には、ボルトＢが挿通され、該ボルトＢは、第一隣接部材２１の連結部２１１１にねじ込まれる。これにより、対向部材３１（本体３２）と第一隣接部材２１とが連結される。また、貫通孔３２２２には、第一隣接部材２１の軸部２１３が挿通される。   The second connecting portion 322 extends in the Z-axis direction and penetrates in a thickness direction at a position corresponding to the connecting portion 2111 and the shaft portion 213 of the first adjacent member 21 (specifically, a position overlapping in the Y-axis direction). It has through holes 3221 and 3222. A bolt B is inserted into the through hole 3221, and the bolt B is screwed into the connecting portion 2111 of the first adjacent member 21. Thereby, the opposing member 31 (the main body 32) and the first adjacent member 21 are connected. The shaft portion 213 of the first adjacent member 21 is inserted into the through hole 3222.

第三連結部３２３は、Ｙ軸方向において蓄電素子１０と重なる位置においてＺ軸方向に延びる。本実施形態の対向部材３１は、複数（本実施形態の例では四つ）の第三連結部３２３を有する。これら複数の第三連結部３２３は、一対の第一連結部３２１の間における第二連結部３２２と複数の接触部３２５とを避けた位置（重ならない位置）に配置されている。   Third connecting portion 323 extends in the Z-axis direction at a position overlapping power storage element 10 in the Y-axis direction. The facing member 31 of the present embodiment has a plurality (four in the example of the present embodiment) of the third connecting portion 323. The plurality of third connecting portions 323 are arranged at positions (non-overlapping positions) between the pair of first connecting portions 321 and avoiding the second connecting portions 322 and the plurality of contact portions 325.

第一延設部３３は、本体３２の閉塞部１２３側の端縁（梁部３２０の端縁）からＹ軸方向に延びると共にＸ軸方向に延びる板状、即ち、Ｘ軸方向に並ぶ複数の蓄電素子１０の閉塞部１２３のそれぞれに沿った板状の部位である。この第一延設部３３のＸ軸方向の寸法は、梁部３２０（本体３２）のＸ軸方向の寸法と略同じである。この第一延設部３３と該第一延設部３３が接続される梁部３２０とは、Ｌ字状の断面（Ｙ−Ｚ面方向の断面）形状、即ち、中央部が屈曲した断面形状を有し、各蓄電素子１０の閉塞部１２３側の角部（各蓄電素子１０における閉塞部１２３と短壁部１２６とによって構成される角部）をＹ−Ｚ面方向の外側から拘束する。   The first extending portion 33 has a plate shape extending in the Y-axis direction and extending in the X-axis direction from an edge (the edge of the beam portion 320) of the main body 32 on the side of the closing portion 123, that is, a plurality of plates arranged in the X-axis direction. It is a plate-like portion along each of the closing portions 123 of the electric storage element 10. The dimension of the first extension portion 33 in the X-axis direction is substantially the same as the dimension of the beam portion 320 (main body 32) in the X-axis direction. The first extending portion 33 and the beam portion 320 to which the first extending portion 33 is connected have an L-shaped cross section (a cross section in the YZ plane direction), that is, a cross-sectional shape in which a central portion is bent. To restrict the corners of the respective storage elements 10 on the side of the closing section 123 (the corners formed by the closing sections 123 and the short wall portions 126 in the respective storage elements 10) from the outside in the YZ plane direction.

第二延設部３４は、本体３２の蓋板１２１側の端縁（梁部３２０の端縁）からＹ軸方向に延びると共にＸ軸方向に延びる板状、即ち、Ｘ軸方向に並ぶ複数の蓄電素子１０の蓋板１２１のそれぞれに沿った板状の部位である。この第二延設部３４のＸ軸方向の寸法は、第一延設部３３と同様に、梁部３２０（本体３２）のＸ軸方向の寸法と略同じである。また、第二延設部３４のＹ軸方向の寸法は、第一延設部３３のＹ軸方向の寸法より小さい。この第二延設部３４と該第二延設部３４が接続される梁部３２０とは、Ｌ字状の断面（Ｙ−Ｚ面方向の断面）形状、即ち、中央部が屈曲した断面形状を有し、各蓄電素子１０の蓋板１２１側の角部（各蓄電素子１０における蓋板１２１と短壁部１２６とによって構成される角部）をＹ−Ｚ面方向の外側から拘束する。   The second extending portion 34 has a plate shape extending from the edge of the main body 32 on the side of the lid plate 121 (the edge of the beam portion 320) in the Y-axis direction and extending in the X-axis direction, that is, a plurality of plates arranged in the X-axis direction. It is a plate-shaped portion along each of the lid plates 121 of the storage element 10. The dimension of the second extending portion 34 in the X-axis direction is substantially the same as the dimension of the beam portion 320 (main body 32) in the X-axis direction, similarly to the first extending portion 33. The dimension of the second extension 34 in the Y-axis direction is smaller than the dimension of the first extension 33 in the Y-axis direction. The second extending portion 34 and the beam portion 320 to which the second extending portion 34 is connected have an L-shaped cross section (a cross section in the YZ plane direction), that is, a cross-sectional shape in which a central portion is bent. And constrain the corners of the respective storage elements 10 on the cover plate 121 side (the corners formed by the cover plate 121 and the short wall 126 in each storage element 10) from the outside in the YZ plane direction.

一対の接続片３５のそれぞれは、本体３２のＸ軸方向の端縁（第一連結部３２１の端縁）からＹ軸方向に延びると共にＺ軸方向に延びる板状の部位である。この接続片３５が終端部材３０に連結されることで、終端部材３０と対向部材３１とが接続（連結）される。   Each of the pair of connecting pieces 35 is a plate-like portion extending from the edge of the main body 32 in the X-axis direction (the edge of the first connecting portion 321) in the Y-axis direction and extending in the Z-axis direction. By connecting the connection piece 35 to the terminal member 30, the terminal member 30 and the facing member 31 are connected (connected).

インシュレータ４は、絶縁性を有し、図１及び図２に示すように、対向部材３１と、Ｘ軸方向に並ぶ複数の蓄電素子１０との間に配置される。このインシュレータ４は、保持部材３における少なくとも複数の蓄電素子１０と対向する領域を覆う。これにより、インシュレータ４は、保持部材３と、Ｘ軸方向に並ぶ複数の蓄電素子１０との間を絶縁する。本実施形態のインシュレータ４は、ポリプロピレンによって形成されている。   The insulator 4 has insulating properties, and is disposed between the facing member 31 and the plurality of power storage elements 10 arranged in the X-axis direction, as shown in FIGS. 1 and 2. The insulator 4 covers at least a region of the holding member 3 facing the plurality of power storage elements 10. Thereby, insulator 4 insulates between holding member 3 and a plurality of power storage elements 10 arranged in the X-axis direction. The insulator 4 of the present embodiment is formed of polypropylene.

具体的に、インシュレータ４は、図７にも示すように、本体３２を覆う本体被覆部４０と、第一延設部３３を覆う第一被覆部（被覆部）４１と、第二延設部３４を覆う第二被覆部４２と、を有する。   Specifically, as shown in FIG. 7, the insulator 4 includes a main body covering portion 40 that covers the main body 32, a first covering portion (covering portion) 41 that covers the first extending portion 33, and a second extending portion. And a second covering portion 42 that covers the first covering portion 34.

本体被覆部４０は、本体３２における蓄電素子１０（詳しくは、短壁部１２６）と対向する対向面を覆う。この本体被覆部４０は、本体３２と対応する形状を有する。即ち、本体被覆部４０は、梁部３２０における蓄電素子１０との対向面を覆う一対の第一本体被覆部４０１と、第一連結部３２１における終端部材３０との対向面を覆う一対の第二本体被覆部４０２と、接触部３２５における蓄電素子１０との対向面を覆う第三本体被覆部４０３と、を有する。また、本実施形態の本体被覆部４０は、第二連結部３２２における第一隣接部材２１との対向面を覆う第四本体被覆部４０４と、第三連結部３２３における蓄電素子１０との対向面を覆う少なくとも一つの第五本体被覆部４０５と、を有する。   The main body covering portion 40 covers an opposing surface of the main body 32 that faces the electric storage element 10 (specifically, the short wall portion 126). The main body covering portion 40 has a shape corresponding to the main body 32. That is, the main body covering portion 40 includes a pair of first main body covering portions 401 covering the facing surface of the beam portion 320 facing the power storage element 10 and a pair of second main body covering portions covering the facing surface of the first connecting portion 321 facing the terminating member 30. It has a main body covering portion 402 and a third main body covering portion 403 that covers a surface of the contact portion 325 facing the power storage element 10. Further, the main body covering portion 40 of the present embodiment includes a fourth main body covering portion 404 that covers a surface of the second connecting portion 322 facing the first adjacent member 21, and a surface of the third connecting portion 323 that faces the power storage element 10. And at least one fifth main body covering portion 405 covering the second main body.

第三本体被覆部４０３は、蓄電素子１０と接触することで該蓄電素子１０に対してＺ軸方向において位置決めされると共に、第三本体被覆部４０３に対する接触部３２５のＸ軸方向への移動を許容する形状を有する。具体的に、第三本体被覆部４０３は、Ｚ軸方向に延び、Ｚ軸方向の各位置において図８に示すような断面、即ち、Ｚ軸方向の各位置において、接触部３２５に沿って延びる本体４０３０から、蓄電素子１０（ケース１２）のＹ軸方向の端部をＸ軸方向に挟むように突出する一対の第一凸部４０３１と、本体４０３０から第一凸部４０３１と反対側に突出する一対の第二凸部４０３２であって、接触部３２５のＸ軸方向の両側に突出する一対の第二凸部４０３２と、を有する。尚、第一凸部４０３１は、少なくとも蓄電素子１０と接する範囲においてＺ軸方向に延びていればよい。   The third main body covering portion 403 is positioned in the Z-axis direction with respect to the power storage device 10 by contacting the power storage device 10, and moves the contact portion 325 with respect to the third main body covering portion 403 in the X-axis direction. Has an acceptable shape. Specifically, the third main body covering portion 403 extends in the Z-axis direction, and extends along the contact portion 325 at each position in the Z-axis direction as shown in a cross section in FIG. A pair of first convex portions 4031 protruding from main body 4030 so as to sandwich the end of power storage element 10 (case 12) in the Y-axis direction in the X-axis direction, and a pair of first convex portions 4031 protruding from main body 4030 on the side opposite to first convex portion 4031. And a pair of second convex portions 4032 protruding from both sides of the contact portion 325 in the X-axis direction. Note that the first protrusion 4031 only needs to extend in the Z-axis direction at least in a range in contact with the power storage element 10.

一対の第一凸部４０３１のそれぞれは、Ｘ軸方向において蓄電素子１０との間に間隔を有さない。即ち、一対の第一凸部４０３１のそれぞれは、蓄電素子１０と接触している。これにより、蓄電装置１にＸ軸方向の加速度が生じたときに等に、蓄電素子１０が対向部材３１に対してＸ軸方向に移動すると、第三本体被覆部４０３は、蓄電素子１０に位置決めされているため該蓄電素子１０の移動（対向部材３１との相対移動）に追随する。また、一対の第二凸部４０３２のそれぞれは、Ｘ軸方向において接触部３２５との間に間隔を有する。これにより、第三本体被覆部４０３は、該第三本体被覆部４０３に対する接触部３２５のＸ軸方向への相対移動を許容する。   Each of the pair of first convex portions 4031 has no space between the first convex portion 4031 and the power storage element 10 in the X-axis direction. That is, each of the pair of first convex portions 4031 is in contact with power storage element 10. Thus, when the power storage device 10 moves in the X-axis direction with respect to the facing member 31, for example, when acceleration in the X-axis direction occurs in the power storage device 1, the third main body covering portion 403 positions the power storage device 10. Therefore, it follows the movement of the power storage element 10 (relative movement with respect to the opposing member 31). Further, each of the pair of second convex portions 4032 has an interval between the pair of second convex portions 4032 and the contact portion 325 in the X-axis direction. Accordingly, the third main body covering portion 403 allows the contact portion 325 to move relative to the third main body covering portion 403 in the X-axis direction.

第一被覆部４１は、少なくとも第一延設部３３における蓄電素子１０と対向する領域を覆う。本実施形態の第一被覆部４１は、第一延設部３３における蓄電素子１０との対向面と、蓄電素子１０と反対側の面とを覆う。具体的に、第一被覆部４１は、第一延設部３３における蓄電素子１０（閉塞部１２３）との対向面に沿って第一延設部３３と本体３２との境界位置から該第一延設部３３の先端（Ｙ軸方向の先端）まで延びると共に、前記先端で折り返して該第一延設部３３における蓄電素子１０と反対側の面に沿って延びる。   The first covering portion 41 covers at least a region of the first extension portion 33 facing the power storage element 10. The first covering portion 41 of the present embodiment covers a surface of the first extension portion 33 facing the power storage element 10 and a surface opposite to the power storage element 10. Specifically, the first covering portion 41 extends from the boundary position between the first extending portion 33 and the main body 32 along the surface of the first extending portion 33 facing the power storage element 10 (the closing portion 123). It extends to the tip (the tip in the Y-axis direction) of the extension part 33, and is folded at the tip to extend along the surface of the first extension part 33 opposite to the power storage element 10.

第二被覆部４２は、少なくとも第二延設部３４の蓄電素子１０と対向する領域を覆う。本実施形態の第二被覆部４２は、第二延設部３４における蓄電素子１０との対向面と、蓄電素子１０と反対側の面とを覆う。具体的に、第二被覆部４２は、第二延設部３４における蓄電素子１０（蓋板１２１）との対向面に沿って第二延設部３４と本体３２との境界位置から該第二延設部３４の先端（Ｙ軸方向の先端）まで延びると共に、前記先端で折り返して該第二延設部３４における蓄電素子１０と反対側の面に沿って延びる。   The second covering portion 42 covers at least a region of the second extension portion 34 facing the power storage element 10. The second covering portion 42 of the present embodiment covers the surface of the second extension portion 34 facing the power storage device 10 and the surface on the opposite side to the power storage device 10. Specifically, the second covering portion 42 extends from the boundary position between the second extending portion 34 and the main body 32 along the surface of the second extending portion 34 facing the power storage element 10 (cover plate 121). It extends to the tip of the extension 34 (the tip in the Y-axis direction), and is folded at the tip to extend along the surface of the second extension 34 opposite to the power storage element 10.

図１及び図２に戻り、バスバ５は、金属等の導電性を有する板状の部材によって構成される。バスバ５は、蓄電装置１に含まれる複数の蓄電素子１０の全てを直列に接続する（導通させる）。このバスバ５は、複数種のバスバを含む。本実施形態のバスバ５は、第一隣接部材２１を介して隣り合う蓄電素子１０の外部端子１３同士を導通させる（即ち、第一隣接部材２１を跨いで接続する）第一バスバ５１と、第三隣接部材２３を介して隣り合う蓄電素子１０の外部端子１３同士を導通させる（即ち、第三隣接部材２３を跨いで接続する）第二バスバ５２と、を有する。本実施形態の蓄電装置１は、一つの第一バスバ５１と、複数の第二バスバ５２と、を有する。   Returning to FIGS. 1 and 2, the bus bar 5 is formed of a conductive plate-shaped member such as a metal. Bus bar 5 connects (conducts) all of the plurality of power storage elements 10 included in power storage device 1 in series. This bus bar 5 includes a plurality of types of bus bars. The bus bar 5 of the present embodiment includes a first bus bar 51 that connects the external terminals 13 of the adjacent power storage elements 10 via the first adjacent member 21 (that is, connects the external terminals 13 across the first adjacent member 21), A second bus bar 52 that electrically connects the external terminals 13 of the adjacent storage elements 10 via the third adjacent member 23 (that is, connects the external terminals 13 across the third adjacent member 23). The power storage device 1 of the present embodiment includes one first bus bar 51 and a plurality of second bus bars 52.

第一バスバ５１は、電気的に接続された一方の外部端子１３から他方の外部端子１３までの間に、第一隣接部材２１と間隔を設けた状態で、Ｚ軸方向における第一隣接部材２１から離れる向き（図１における上向き）に凸状に延びる部位を有する。本実施形態の第一バスバ５１は、矩形の板状の部材が折り曲げ加工等されることによって形成される。   The first bus bar 51 is provided between the one external terminal 13 and the other external terminal 13 that are electrically connected to the first adjacent member 21 in the Z-axis direction in a state where an interval from the first adjacent member 21 is provided. And a portion protruding in a direction away from the upper side (upward in FIG. 1). The first bus bar 51 of the present embodiment is formed by bending a rectangular plate-shaped member.

第二バスバ５２は、Ｘ軸方向に延びる（詳しくは、Ｘ―Ｙ平面方向に広がる）略矩形の板状である。   The second bus bar 52 has a substantially rectangular plate shape extending in the X-axis direction (specifically, extending in the XY plane direction).

以上の蓄電装置１によれば、第三隣接部材２３と該第三隣接部材２３によって保持される蓄電素子１０とによって構成される系（本実施形態の例では、第一隣接部材２１と第二隣接部材２２との間に配置される複数の蓄電素子１０と複数の第三隣接部材２３との塊）に対向部材３１の接触部３２５が接触していることで該系の剛性が向上している。これにより、接触部３２５が接触していない系に比べ、該系全体の共振周波数が高くなり、その結果、蓄電装置１の設置（搭載）された装置や車両等の作動時の振動、即ち蓄電装置１の使用時に外部から伝わる振動によって該蓄電装置１（系）が共振し難くなる。   According to the power storage device 1 described above, a system configured by the third adjacent member 23 and the power storage element 10 held by the third adjacent member 23 (in the example of the present embodiment, the first adjacent member 21 and the second Since the contact portion 325 of the opposing member 31 is in contact with the mass of the plurality of power storage elements 10 and the plurality of third adjacent members 23 arranged between the adjacent members 22, the rigidity of the system is improved. I have. As a result, the resonance frequency of the entire system is higher than that of the system in which the contact portion 325 is not in contact, and as a result, the vibration during the operation of the device or the vehicle or the like in which the power storage device 1 is installed (mounted), that is, the power storage When the device 1 is used, the power storage device 1 (system) hardly resonates due to vibration transmitted from outside.

本実施形態の蓄電装置１では、対向部材３１が、複数の蓄電素子１０のＹ軸方向の両側にそれぞれ配置されている。このように、第三隣接部材２３と該第三隣接部材２３によって保持される蓄電素子１０とによって構成される系がＹ軸方向の両外側から接触部３２５に接触されることで、該系全体の剛性がより向上する。このため、前記系全体の共振周波数がより高くなる。これにより、蓄電装置１の使用時に外部から伝わる振動によって該蓄電装置１（系）がより共振し難くなる。   In power storage device 1 of the present embodiment, opposed members 31 are arranged on both sides of the plurality of power storage elements 10 in the Y-axis direction. As described above, the system constituted by the third adjacent member 23 and the electric storage element 10 held by the third adjacent member 23 is brought into contact with the contact portions 325 from both outer sides in the Y-axis direction, so that the entire system The stiffness is further improved. For this reason, the resonance frequency of the whole system becomes higher. This makes it difficult for the power storage device 1 (system) to resonate due to vibration transmitted from outside when the power storage device 1 is used.

また、本実施形態の蓄電装置１では、複数の接触部３２５が、Ｘ軸方向において終端部材３０と第一隣接部材２１との間を等間隔に区切る位置に配置されている。このため、Ｘ軸方向において終端部材３０と第一隣接部材２１との間を等間隔に区切る位置で複数の接触部３２５が系に接触するため、Ｘ軸方向において全体的に（即ち、Ｘ軸方向の一部に偏らずに）バランスよく系の剛性を向上させることができる。これにより、系全体の剛性がより好適に向上し、その結果、蓄電装置１の使用時に外部から伝わる振動によって該蓄電装置１（系）がより共振し難くなる。   Further, in the power storage device 1 of the present embodiment, the plurality of contact portions 325 are arranged at positions that partition the end member 30 and the first adjacent member 21 at equal intervals in the X-axis direction. For this reason, since the plurality of contact portions 325 contact the system at positions that divide the end member 30 and the first adjacent member 21 at equal intervals in the X-axis direction, the entirety in the X-axis direction (that is, the X-axis direction). The rigidity of the system can be improved in a well-balanced manner (without biasing in a part of the direction). Thereby, the rigidity of the entire system is more appropriately improved, and as a result, the power storage device 1 (system) is less likely to resonate due to vibration transmitted from outside when the power storage device 1 is used.

また、本実施形態の蓄電装置１では、接触部３２５は、第三隣接部材２３及び該第三隣接部材２３によって移動を規制されている蓄電素子１０の少なくとも一方と接触することによって弾性変形している。この接触部３２５の弾性変形によって生じた弾発力（弾性復帰力）によって系がＹ軸方向に押圧されることで系の剛性をより効果的に向上させることができる。これにより、系全体の剛性がより向上し、その結果、蓄電装置１の使用時に外部から伝わる振動によって該蓄電装置１（系）がより共振し難くなる。   Further, in power storage device 1 of the present embodiment, contact portion 325 is elastically deformed by contacting at least one of third adjacent member 23 and power storage element 10 whose movement is regulated by third adjacent member 23. I have. The system is pressed in the Y-axis direction by the elastic force (elastic return force) generated by the elastic deformation of the contact portion 325, so that the rigidity of the system can be more effectively improved. As a result, the rigidity of the entire system is further improved, and as a result, the power storage device 1 (system) is less likely to resonate due to vibration transmitted from the outside when the power storage device 1 is used.

接触部３２５は、Ｚ軸方向に延びると共に、該接触部３２５と接触する第三隣接部材２３及び蓄電素子１０の少なくとも一方に向けて膨出するように湾曲している。このように、Ｚ軸方向に延びる部位を湾曲させることで形成された接触部３２５を系に押し当てるといった簡素な構成によって、弾発力を生じさせて系に押圧力を加える、即ち、系の剛性を効果的に向上させることができる。   The contact portion 325 extends in the Z-axis direction and is curved so as to bulge toward at least one of the third adjacent member 23 and the power storage element 10 that is in contact with the contact portion 325. As described above, by a simple configuration in which a contact portion 325 formed by bending a portion extending in the Z-axis direction is pressed against the system, a resilient force is generated to apply a pressing force to the system, that is, to apply a pressing force to the system. The rigidity can be effectively improved.

また、本実施形態の蓄電装置１では、第三隣接部材２３が、Ｙ軸方向に流体を流通させる流路２３５を該第三隣接部材２３と隣り合う蓄電素子１０との間に形成し、接触部３２５が、第三隣接部材２３と隣り合う蓄電素子１０と接触している。これにより、蓄電装置１では、第三隣接部材２３と蓄電素子１０との間に流路２３５が形成されるため、該流路２３５に温度調整用の流体を流通させることで、蓄電素子１０の温度を調整することができる。しかも、接触部３２５を、第三隣接部材２３と蓄電素子１０とに跨らせず、蓄電素子１０に接触させることで、接触部３２５は、流路２３５の開口を避けた位置、即ち、流路２３５の開口を塞がない位置で系に接触するため、流路２３５を流れる流体の流通を妨げない。その結果、系の剛性を高めて蓄電装置１の使用時の共振を防ぎつつ、蓄電素子１０の温度調整を効率よく行うことができる。   Further, in the power storage device 1 of the present embodiment, the third adjacent member 23 forms the flow path 235 for flowing the fluid in the Y-axis direction between the third adjacent member 23 and the adjacent power storage element 10, The portion 325 is in contact with the power storage element 10 adjacent to the third adjacent member 23. Accordingly, in the power storage device 1, the flow path 235 is formed between the third adjacent member 23 and the power storage element 10. Temperature can be adjusted. Moreover, by contacting the contact portion 325 with the power storage element 10 without straddling the third adjacent member 23 and the power storage element 10, the contact portion 325 is located at a position avoiding the opening of the flow path 235, that is, the flow Since the system contacts the system at a position where the opening of the passage 235 is not closed, the flow of the fluid flowing through the passage 235 is not hindered. As a result, the temperature of power storage element 10 can be efficiently adjusted while increasing the rigidity of the system to prevent resonance when power storage device 1 is used.

また、本実施形態の蓄電装置１では、第三隣接部材２３と隣り合う蓄電素子１０が、該蓄電素子１０の外表面を構成する外装シート１４を有している。また、インシュレータ４（詳しくは、第三本体被覆部４０３）が、第三隣接部材２３と隣り合う蓄電素子１０と接触することで該蓄電素子１０に対してＸ軸方向において位置決めされると共に、該インシュレータ４（詳しくは、第三本体被覆部４０３）に対する接触部３２５のＸ軸方向への移動を許容する形状を有している（図８参照）。このように、接触部３２５と蓄電素子１０との間にインシュレータ４（詳しくは、第三本体被覆部４０３）が配置されるため、蓄電装置１にＸ軸方向の加速度が生じたことで蓄電素子１０が対向部材３１に対して相対移動しても、外装シート１４が接触部３２５と擦れて破れる等の損傷を防ぐことができる。しかも、インシュレータ４（詳しくは、第三本体被覆部４０３）が、蓄電素子１０に位置決めされると共にインシュレータ４に対する接触部３２５のＸ軸方向への移動を許容しているため、蓄電装置１にＸ軸方向の加速度が生じたときに、インシュレータ４（詳しくは、第三本体被覆部４０３）が蓄電素子１０のＸ軸方向への移動（対向部材３１との相対移動）に追随して移動する。このとき、インシュレータ４（詳しくは、第三本体被覆部４０３）に対する接触部３２５の相対移動（Ｘ軸方向において蓄電素子１０の移動方向と反対側への移動）が許容される。その結果、インシュレータ４の損傷が抑えられる。   Further, in the power storage device 1 of the present embodiment, the power storage element 10 adjacent to the third adjacent member 23 has the exterior sheet 14 forming the outer surface of the power storage element 10. In addition, the insulator 4 (specifically, the third main body covering portion 403) is positioned in the X-axis direction with respect to the power storage element 10 by contacting the power storage element 10 adjacent to the third adjacent member 23, and It has a shape that allows the contact portion 325 to move in the X-axis direction with respect to the insulator 4 (specifically, the third main body covering portion 403) (see FIG. 8). As described above, since the insulator 4 (specifically, the third main body covering portion 403) is disposed between the contact portion 325 and the power storage device 10, the power storage device 1 is caused to undergo acceleration in the X-axis direction due to the acceleration in the X-axis direction. Even if 10 moves relative to opposing member 31, damage such as breakage of exterior sheet 14 by rubbing against contact portion 325 can be prevented. Moreover, since the insulator 4 (specifically, the third main body covering portion 403) is positioned on the power storage element 10 and allows the contact portion 325 with the insulator 4 to move in the X-axis direction, the power storage device 1 When the acceleration in the axial direction occurs, the insulator 4 (specifically, the third main body covering portion 403) moves following the movement of the power storage element 10 in the X-axis direction (relative movement with the opposing member 31). At this time, relative movement of the contact portion 325 with respect to the insulator 4 (specifically, the third main body covering portion 403) (movement in the X-axis direction opposite to the moving direction of the power storage element 10) is allowed. As a result, damage to the insulator 4 is suppressed.

尚、本発明の蓄電素子は、上記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内において種々変更を加え得ることは勿論である。例えば、ある実施形態の構成に他の実施形態の構成を追加することができ、また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることができる。さらに、ある実施形態の構成の一部を削除することができる。   It should be noted that the electric storage device of the present invention is not limited to the above embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention. For example, the configuration of another embodiment can be added to the configuration of one embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, a part of the configuration of an embodiment can be deleted.

接触部３２５の具体的な構成は、限定されない。例えば、上記実施形態の接触部３２５は、Ｚ軸方向に延びると共に蓄電素子１０に向けて膨出するように湾曲することで、蓄電素子１０との接触によって弾性変形可能であるが、弾性変形しない（できない）構成であってもよい。この場合、接触部３２５が、第三隣接部材２３及び該第三隣接部材２３と隣り合う蓄電素子１０の少なくとも一方を、Ｙ軸方向に押圧してもよく、押圧せずに単に接触しているだけでもよい。何れの構成によっても、系（第三隣接部材２３と該第三隣接部材２３によってＹ−Ｚ面方向の動きが規制されている蓄電素子１０の群（塊））の剛性が向上する。   The specific configuration of the contact portion 325 is not limited. For example, the contact portion 325 of the above embodiment extends in the Z-axis direction and is curved so as to bulge toward the power storage device 10, so that the contact portion 325 is elastically deformable by contact with the power storage device 10, but is not elastically deformed. The configuration may be (not possible). In this case, the contact portion 325 may press at least one of the third adjacent member 23 and at least one of the power storage elements 10 adjacent to the third adjacent member 23 in the Y-axis direction, or simply contact without pressing. Or just In any case, the rigidity of the system (the third adjacent member 23 and the group (lump) of the power storage elements 10 whose movement in the YZ plane direction is restricted by the third adjacent member 23) is improved.

また、上記実施形態の接触部３２５では、Ｚ軸方向の両端が梁部３２０に接続されているが、この構成に限定されず、何れか一方の端部のみが梁部３２０に接続される構成等でもよい。   Further, in the contact portion 325 of the embodiment, both ends in the Z-axis direction are connected to the beam portion 320, but the present invention is not limited to this configuration, and only one of the ends is connected to the beam portion 320. And so on.

また、上記実施形態の接触部３２５は、短壁部１２６のＺ軸方向の中央部に接触しているが、この構成に限定されず、短壁部１２６のＺ軸方向の端部に接触していてもよい。また、上記実施形態の蓄電装置１では、接触部３２５が、Ｙ軸方向の両側から蓄電素子１０に接触しているが、この構成に限定されず、Ｙ軸方向のいずれか一方の側から接触する構成であってもよい。   Further, the contact portion 325 of the above embodiment is in contact with the center portion of the short wall portion 126 in the Z-axis direction, but is not limited to this configuration, and is in contact with the end portion of the short wall portion 126 in the Z-axis direction. May be. Further, in power storage device 1 of the above embodiment, contact portion 325 is in contact with power storage element 10 from both sides in the Y-axis direction. However, the configuration is not limited to this, and contact portion 325 may be in contact from any one side in the Y-axis direction. The configuration may be as follows.

また、上記実施形態の対向部材３１は、四つの接触部３２５を有しているが、この構成に限定されない。対向部材３１は、接触部３２５を一〜三つ、又は五つ以上有していてもよい。また、複数の接触部３２５は、一対の終端部材３０の間を等間隔に区切る位置、又は、Ｘ軸方向において終端部材３０と第一隣接部材２１との間を等間隔に区切る位置に配置されていなくてもよい。この場合、全ての接触部３２５が前記位置に配置されていなくてもよく、一部の接触部３２５が前記位置に配置されていなくてもよい。   Further, the facing member 31 of the above embodiment has the four contact portions 325, but is not limited to this configuration. The facing member 31 may have one to three, or five or more contact portions 325. In addition, the plurality of contact portions 325 are arranged at positions that divide the pair of terminal members 30 at equal intervals, or at positions that divide the terminal members 30 and the first adjacent member 21 at equal intervals in the X-axis direction. You do not have to. In this case, not all the contact portions 325 need to be arranged at the position, and some contact portions 325 need not be arranged at the position.

上記実施形態の蓄電装置１では、接触部３２５が、蓄電素子１０と接触しているが、この構成に限定されない。接触部３２５は、第三隣接部材２３及び該第三隣接部材２３と隣り合う（即ち、Ｙ−Ｚ面方向の動きが規制された）蓄電素子１０とに跨って（即ち、両方に）接触していてもよい。   In the power storage device 1 of the above embodiment, the contact portion 325 is in contact with the power storage element 10, but is not limited to this configuration. The contact portion 325 is in contact with the third adjacent member 23 and the power storage element 10 adjacent to the third adjacent member 23 (i.e., the movement in the YZ plane direction is restricted) (i.e., contacts both). May be.

上記実施形態の蓄電装置１では、接触部３２５は、間接的に蓄電素子１０に接触している、即ち、絶縁性を有するインシュレータ４を介して蓄電素子１０に接触している（図６及び図８参照）が、この構成に限定されない。接触部３２５は、絶縁性を有していれば、直接、蓄電素子１０に接触してもよい。   In the power storage device 1 of the above embodiment, the contact portion 325 is indirectly in contact with the power storage element 10, that is, in contact with the power storage element 10 via the insulator 4 having an insulating property (see FIGS. 6 and 6). 8) is not limited to this configuration. Contact portion 325 may directly contact power storage element 10 as long as it has insulating properties.

上記実施形態の蓄電装置１では、隣接部材２（第一〜第三隣接部材２１〜２３）が規制部（第一〜第三規制部２１２、２２２、２３２）によって該隣接部材２と隣接する蓄電素子１０のＹ−Ｚ面方向への移動を規制しているが、この構成に限定されない。隣接部材２は、該隣接部材２と隣接する蓄電素子１０のＹ−Ｚ面方向への移動を規制していなくてもよい。   In the power storage device 1 of the embodiment, the adjacent member 2 (first to third adjacent members 21 to 23) is adjacent to the adjacent member 2 by the regulating portion (first to third regulating portions 212, 222, 232). Although the movement of the element 10 in the YZ plane direction is restricted, the present invention is not limited to this configuration. The adjacent member 2 may not restrict the movement of the energy storage device 10 adjacent to the adjacent member 2 in the YZ plane direction.

１…蓄電装置、２…隣接部材、２１…第一隣接部材、２１１…第一本体部、２１１１…連結部、２１２…第一規制部、２１３…軸部、２１５…流路、２１６…凸部、２２…第二隣接部材、２２１…第二本体部、２２２…第二規制部、２２５…流路、２２６…凸部、２３…第三隣接部材、２３１…第三本体部、２３２…第三規制部、２３５…流路、３…保持部材、３０…終端部材、３００…本体、３０１…圧接部、３１…対向部材、３２…本体、３２０…梁部、３２１…第一連結部、３２２…第二連結部、３２２１…貫通孔、３２２２…貫通孔、３２３…第三連結部、３２５…接触部、３３…第一延設部、３４…第二延設部、３５…接続片、４…インシュレータ、４０…本体被覆部、４０１…第一本体被覆部、４０２…第二本体被覆部、４０３…第三本体被覆部、４０３０…本体、４０３１…第一凸部、４０３２…第二凸部、４０４…第四本体被覆部、４０５…第五本体被覆部、４１…第一被覆部、４２…第二被覆部、５…バスバ、５１…第一バスバ、５２…第二バスバ、１０…蓄電素子、１１…電極体、１２…ケース、１２０…ケース本体、１２１…蓋板、１２３…閉塞部、１２４…胴部、１２５…長壁部、１２６…短壁部、１３…外部端子、１４…外装シート、１５…絶縁部材、Ｂ…ボルト   DESCRIPTION OF SYMBOLS 1 ... Power storage device, 2 ... Adjacent member, 21 ... First adjacent member, 211 ... First main body part, 2111 ... Connecting part, 212 ... First regulating part, 213 ... Shaft part, 215 ... Flow path, 216 ... Convex part , 22 ... second adjacent member, 221 ... second main body part, 222 ... second regulating part, 225 ... flow path, 226 ... convex part, 23 ... third adjacent member, 231 ... third main body part, 232 ... third Regulating part, 235: flow path, 3: holding member, 30: terminal member, 300: main body, 301: pressure contact part, 31: facing member, 32: main body, 320: beam part, 321: first connecting part, 322 ... Second connecting portion, 3221 through hole, 3222 through hole, 323 third connecting portion, 325 contact portion, 33 first extending portion, 34 second extending portion, 35 connecting piece, 4. Insulator, 40: body covering portion, 401: first body covering portion, 402: second body covering portion, 403 Third body covering portion, 4030 body, 4031 first protrusion, 4032 second convex portion, 404 fourth body covering portion, 405 fifth body covering portion, 41 first covering portion, 42 second Two covering parts, 5 busbar, 51 first busbar, 52 second busbar, 10 power storage element, 11 electrode body, 12 case, 120 case body, 121 cover plate, 123 closing part, 124 ... trunk, 125 ... long wall, 126 ... short wall, 13 ... external terminal, 14 ... exterior sheet, 15 ... insulating member, B ... bolt

Claims (9)

第一方向に並ぶ複数の蓄電素子と、
前記複数の蓄電素子のうちの隣り合う二つの蓄電素子の間に配置される隣接部材と、
前記第一方向と直交する第二方向において前記複数の蓄電素子と対向する対向部材と、を備え、
前記対向部材は、
前記第一方向に延び且つ前記第一方向及び前記第二方向と直交する第三方向に間隔をあけて配置される一対の梁部材と、
前記一対の梁部材同士を連結する接触部材であって、前記隣接部材及び前記蓄電素子の少なくとも一方と直接又は間接に接触する接触部と、を有する、蓄電装置。 A plurality of power storage elements arranged in a first direction,
An adjacent member disposed between two adjacent power storage elements of the plurality of power storage elements,
A facing member facing the plurality of power storage elements in a second direction orthogonal to the first direction,
The facing member,
A pair of beam members extending in the first direction and arranged at intervals in a third direction orthogonal to the first direction and the second direction,
A power storage device, comprising: a contact member that connects the pair of beam members to each other, and a contact portion that directly or indirectly contacts at least one of the adjacent member and the power storage element. 前記対向部材は、前記複数の蓄電素子の前記第二方向の両側にそれぞれ配置され且つ前記接触部をそれぞれ有する、請求項１に記載の蓄電装置。   The power storage device according to claim 1, wherein the opposing members are arranged on both sides of the plurality of power storage elements in the second direction, respectively, and each have the contact portion. 前記第一方向において前記複数の蓄電素子の両側に配置される一対の終端部材を備え、
前記対向部材は、前記一対の終端部材同士を接続すると共に、前記接触部を複数有し、
前記複数の接触部は、前記第一方向において前記一対の終端部材間を等間隔に区切る位置に配置される、請求項１又は２に記載の蓄電装置。 A pair of terminal members disposed on both sides of the plurality of power storage elements in the first direction,
The facing member connects the pair of terminal members and has a plurality of the contact portions,
The power storage device according to claim 1, wherein the plurality of contact portions are arranged at positions that divide the pair of terminal members at regular intervals in the first direction. 前記第一方向において前記複数の蓄電素子の両側に配置される一対の終端部材を備え、
前記対向部材は、前記一対の終端部材同士を接続すると共に、前記接触部を複数有し、
前記隣接部材は、前記対向部材に固定される第一隣接部材を有し、
前記複数の接触部は、前記第一方向において前記終端部材と前記第一隣接部材との間を等間隔に区切る位置に配置される、請求項１又は２に記載の蓄電装置。 A pair of terminal members disposed on both sides of the plurality of power storage elements in the first direction,
The facing member connects the pair of terminal members and has a plurality of the contact portions,
The adjacent member has a first adjacent member fixed to the opposed member,
3. The power storage device according to claim 1, wherein the plurality of contact portions are arranged at positions that divide the end member and the first adjacent member at equal intervals in the first direction. 4. 前記接触部は、前記隣接部材及び前記蓄電素子の少なくとも一方と接触することによって弾性変形している、請求項１〜４のいずれか１項に記載の蓄電装置。   The power storage device according to claim 1, wherein the contact portion is elastically deformed by contacting at least one of the adjacent member and the power storage element. 前記接触部は、該接触部と接触する前記隣接部材及び前記蓄電素子の少なくとも一方に向けて膨出するように湾曲する、請求項５に記載の蓄電装置。   The power storage device according to claim 5, wherein the contact portion is curved so as to bulge toward at least one of the adjacent member and the power storage element that is in contact with the contact portion. 前記隣接部材は、前記第二方向に流体を流通させる流路を該隣接部材と隣り合う蓄電素子との間に形成し、
前記接触部は、前記隣接部材と隣り合う蓄電素子と接触する、請求項１〜６のいずれか１項に記載の蓄電装置。 The adjacent member forms a flow path for flowing the fluid in the second direction between the adjacent member and an adjacent power storage element,
The power storage device according to claim 1, wherein the contact portion contacts a power storage element adjacent to the adjacent member. 前記接触部と、前記蓄電素子との間に配置されるインシュレータを備え、
前記接触部は、前記インシュレータを介して前記蓄電素子に接触し、
前記インシュレータは、前記蓄電素子と接触することで該蓄電素子に対して前記第一方向において位置決めされると共に、該インシュレータに対する前記接触部の前記第一方向への移動を許容する形状を有する、請求項１〜７のいずれか１項に記載の蓄電装置。 The contact portion, comprising an insulator disposed between the power storage element,
The contact portion contacts the power storage element via the insulator,
The insulator is positioned in the first direction with respect to the power storage element by being in contact with the power storage element, and has a shape that allows movement of the contact portion with respect to the insulator in the first direction. Item 8. The power storage device according to any one of Items 1 to 7. 前記蓄電素子は、該蓄電素子の外表面を構成する外装シートを有し、
前記インシュレータは、前記蓄電素子の外装シートに接触する、請求項８に記載の蓄電装置。 The power storage element has an exterior sheet constituting an outer surface of the power storage element,
The power storage device according to claim 8, wherein the insulator contacts an exterior sheet of the power storage element.
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