JP6086200B2 - Power storage module - Google Patents

Power storage module Download PDF

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JP6086200B2
JP6086200B2 JP2012234406A JP2012234406A JP6086200B2 JP 6086200 B2 JP6086200 B2 JP 6086200B2 JP 2012234406 A JP2012234406 A JP 2012234406A JP 2012234406 A JP2012234406 A JP 2012234406A JP 6086200 B2 JP6086200 B2 JP 6086200B2
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holding member
holding
terminal
lead terminal
power storage
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JP2014086272A (en
Inventor
正邦 春日井
正邦 春日井
洋樹 下田
洋樹 下田
和幸 中垣
和幸 中垣
正人 筒木
正人 筒木
東小薗　誠
誠 東小薗
澤田　尚
尚 澤田
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、蓄電モジュールに関する。   The present invention relates to a power storage module.

内部に蓄電要素が収容されてなる蓄電素子の一例としてリチウムイオン電池やニッケル水素電池等の二次電池等が知られている。リチウムイオン電池等の二次電池は、複数個を接続することにより電池モジュールを構成する。このような電池モジュールとしては、例えば、特許文献１に記載されているものなどが知られている。   Secondary batteries such as lithium ion batteries and nickel metal hydride batteries are known as examples of power storage elements in which power storage elements are housed. Secondary batteries, such as a lithium ion battery, comprise a battery module by connecting two or more. As such a battery module, for example, a battery module described in Patent Document 1 is known.

特開２００６−２１０３１２号公報JP 2006-210312 A

上記特許文献１には、端部から正極および負極のリード端子が突出する単電池を複数個、積層してなる電池モジュールが開示されている。この電池モジュールにおいて、隣り合う単電池は、極性の相違する（逆極性の）リード端子同士を接続することにより直列に接続される。   Patent Document 1 discloses a battery module formed by laminating a plurality of unit cells from which positive and negative lead terminals protrude from an end portion. In this battery module, adjacent unit cells are connected in series by connecting lead terminals having different polarities (reverse polarities).

特許文献１に記載の電池モジュールでは、リード端子同士の短絡を防止するために、リード端子の両面側に絶縁板を配して挟持する構成としているが、複数枚重ねられた絶縁板が、振動などによりずれると、リード端子同士の接続状態が悪化したり、短絡の発生が懸念される。   In the battery module described in Patent Document 1, in order to prevent a short circuit between the lead terminals, an insulating plate is arranged and sandwiched on both sides of the lead terminals. If they are shifted due to the above, there is a concern that the connection state between the lead terminals deteriorates or a short circuit occurs.

本発明は上記のような事情に基づいて完成されたものであって、接続信頼性を高めるとともに短絡の発生を防止した蓄電モジュールを提供することを目的とする。   The present invention has been completed based on the above circumstances, and an object thereof is to provide a power storage module that improves connection reliability and prevents occurrence of a short circuit.

上記課題を解決するものとして、本発明は、端部から外側方向に突出する正極および負極のリード端子を有する複数の蓄電素子を、積層してなる積層体と、 前記蓄電素子の端部に取り付けられて、当該蓄電素子を保持する保持部材と、を備え、前記保持部材には、前記蓄電素子の状態を検知するとともに前記リード端子に接続される検知用端子を、前記検知用端子の一面が前記リード端子の一方の面と同一面内となる位置または当該リード端子の一方の面に食い込む位置で保持する端子保持部と、前記蓄電素子と外部機器とを電気的に接続する接続部材を、前記接続部材の一面が前記リード端子の前記一方の面と同一面内となる位置または当該リード端子の前記一方の面に食い込む位置で保持する接続部材保持部と、が設けられ、前記蓄電素子を積層したときに重なり合う前記保持部材のうち、一方の保持部材には他方の保持部材側に突出する係合部が設けられ、前記他方の保持部材には前記係合部に係合される被係合部が設けられており、前記係合部および前記被係合部は、相互に嵌りあう形状であり、前記係合部には、係止爪が、前記係合部の突出する方向と交差する方向に突出して形成されており、前記被係合部には前記係止爪を係止する係止突部が形成されている蓄電モジュールである。 In order to solve the above-described problems, the present invention provides a stacked body in which a plurality of power storage elements having positive and negative lead terminals protruding outward from an end are stacked, and attached to the end of the power storage element And a holding member for holding the power storage element, wherein the holding member detects a state of the power storage element and has a detection terminal connected to the lead terminal on one side of the detection terminal. A terminal holding portion for holding at a position that is in the same plane as one surface of the lead terminal or a position that bites into one surface of the lead terminal, and a connection member that electrically connects the power storage element and an external device, A connecting member holding portion for holding at a position where one surface of the connecting member is in the same plane as the one surface of the lead terminal or a position where the one surface of the lead terminal bites into the one side of the lead terminal; Of the holding members that overlap when the children are stacked, one holding member is provided with an engaging portion that protrudes toward the other holding member, and the other holding member is engaged with the engaging portion. An engaged portion is provided, and the engaging portion and the engaged portion are shaped to fit with each other, and a locking claw protrudes from the engaging portion in a direction in which the engaging portion protrudes. The storage module is formed so as to protrude in a direction intersecting with the engaging portion, and the engaging portion is formed with a locking projection for locking the locking claw.

本発明において、蓄電素子を積層したときに重なり合う保持部材のうち一方の保持部材には係合部が設けられ、他方の保持部材には係合部に係合される被係合部が設けられている。つまり、本発明において、端部に保持部材が取り付けられた蓄電素子を積層すると、一方の保持部材の係合部に他方の保持部材の被係合部が係合した状態で重なり合うので、蓄電モジュールが振動等を受けたとしても保持部材のずれが生じ難い。その結果、本発明によれば、リード端子同士の接続状態も悪化せず、他のリード端子との接触等に起因する短絡の発生も防ぐことができるので、接続信頼性を高めるとともに短絡の発生を防止した蓄電モジュールを提供することができる。   In the present invention, of the holding members that overlap when the power storage elements are stacked, one holding member is provided with an engaging portion, and the other holding member is provided with an engaged portion that is engaged with the engaging portion. ing. That is, in the present invention, when the power storage element having the holding member attached to the end portion is stacked, the power storage module overlaps with the engagement portion of one holding member engaged with the engaged portion of the other holding member. Even when subjected to vibration or the like, the holding member is hardly displaced. As a result, according to the present invention, the connection state between the lead terminals is not deteriorated, and the occurrence of a short circuit due to contact with other lead terminals can be prevented, so that the connection reliability is improved and the occurrence of the short circuit is achieved. It is possible to provide a power storage module that prevents the above.

また、このような構成とすると、保持部材を重ねる際に、一方の保持部材の係合部と他方の保持部材の被係合部が嵌りあうので省スペースである。
また、保持部材の端子保持部に検知用端子を保持状態にしておいて、蓄電素子を配置すると、検知用端子とリード端子とが面接触するので、蓄電素子と検知用端子との接続信頼性を高めることができる。
さらに、接続部材保持部に接続部材を保持状態にしておいて蓄電素子を配置すると、接続部材とリード端子とが面接触するので、蓄電素子と接続部材との接続信頼性を高めることができる。 Further, with such a configuration, when the holding members are stacked, the engaging portion of one holding member and the engaged portion of the other holding member are fitted to save space.
In addition, when the detection terminal is held in the terminal holding portion of the holding member and the storage element is arranged, the detection terminal and the lead terminal are in surface contact, so the connection reliability between the storage element and the detection terminal is reliable. Can be increased.
Further, when the storage element is arranged with the connection member held in the connection member holding portion, the connection member and the lead terminal are in surface contact with each other, so that the connection reliability between the storage element and the connection member can be improved.

本発明は、以下の構成としてもよい。
重なり合う前記保持部材は２か所以上で互いに係合していてもよい。
このような構成とすると、確実に保持部材のずれを防止することができるので好ましい。 The present invention may have the following configurations.
The holding member fit heavy Do Ri may have engaged with each other at two or more positions.
Such a configuration is preferable because the holding member can be reliably prevented from shifting.

本発明によれば、接続信頼性を高めるとともに短絡の発生を防止した蓄電モジュールを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the electrical storage module which raised connection reliability and prevented generation | occurrence | production of a short circuit can be provided.

実施形態１の蓄電モジュールの斜視図The perspective view of the electrical storage module of Embodiment 1 積層体の斜視図Perspective view of laminate 積層体の平面図Plan view of laminate 積層体の側面図Side view of laminate 図４のＡ−Ａ線における断面図Sectional drawing in the AA line of FIG. 積層体の正面図Front view of laminate 図６のＢ−Ｂ線における断面図Sectional drawing in the BB line of FIG. 電池ユニットの平面図Plan view of battery unit 図８のＣ−Ｃ線における断面図Sectional drawing in the CC line of FIG. 電池ユニットの平面図Plan view of battery unit 図１０のＤ−Ｄ線における断面図Sectional drawing in the DD line of FIG. 保持部材に伝熱板を取り付けた様子を裏側から示す斜視図The perspective view which shows a mode that the heat exchanger plate was attached to the holding member from the back side 図１２の要部拡大斜視図The principal part expansion perspective view of FIG. 伝熱板を取り付けた保持部材に検知用端子を配置した様子を示す平面図The top view which shows a mode that the terminal for a detection has been arrange | positioned to the holding member which attached the heat exchanger plate 伝熱板を取り付けた保持部材に検知用端子および接続部材を配置した様子を示す平面図The top view which shows a mode that the terminal for a detection and the connection member were arrange | positioned to the holding member which attached the heat exchanger plate

＜実施形態１＞
本発明を電池モジュール１０に適用した実施形態１を図１ないし図１５によって説明する。以下の説明において、図４における左側を前方とし右側を後方とし、図４の上方を上とし下方を下とする。
本実施形態の電池モジュール１０は、例えばＩｎｔｅｇｒａｔｅｄ Ｓｔａｒｔｅｒ Ｇｅｎｅｒａｔｏｒ（ＩＳＧ）用の電池モジュール１０として用いられる。 <Embodiment 1>
A first embodiment in which the present invention is applied to a battery module 10 will be described with reference to FIGS. In the following description, the left side in FIG. 4 is the front, the right side is the rear, the upper side in FIG. 4 is the upper side, and the lower side is the lower side.
The battery module 10 of the present embodiment is used as, for example, a battery module 10 for an integrated starter generator (ISG).

（電池モジュール１０）
電池モジュール１０は、図１に示すように、全体として略直方体形状をなしている。電池モジュール１０の前側面および後側面（図１における左右に配される面）からはそれぞれ、各単電池３２（蓄電素子の一例）のリード端子３４に接続された電線６５が複数本、外部に導出されている。複数本の電線６５は、それぞれ、一端が板状の電圧検知端子６６（検知用端子の一例）を介して単電池３２のリード端子３４に接続され、他端が電圧検知出力コネクタ６４（以下「コネクタ６４」という）に接続されている。 (Battery module 10)
As shown in FIG. 1, the battery module 10 has a substantially rectangular parallelepiped shape as a whole. A plurality of electric wires 65 connected to the lead terminals 34 of each unit cell 32 (an example of a power storage element) are respectively connected to the outside from the front side surface and rear side surface (surfaces arranged on the left and right in FIG. 1) of the battery module 10 Has been derived. One end of each of the plurality of electric wires 65 is connected to the lead terminal 34 of the unit cell 32 via a plate-shaped voltage detection terminal 66 (an example of a detection terminal), and the other end is connected to a voltage detection output connector 64 (hereinafter “ Connector 64 ").

前側面側に導出される電線６５に接続された複数のコネクタ６４、および後側面側に導出される電線６５に接続された複数のコネクタ６４は、それぞれ、積層され一体化されている。   The plurality of connectors 64 connected to the electric wire 65 led out to the front side surface and the plurality of connectors 64 connected to the electric wire 65 led out to the rear side surface are respectively laminated and integrated.

電池モジュール１０は、図４に示すように、複数の単電池３２（本実施形態では６個の単電池３２）を積層してなる積層体３０と、積層体３０を収容する金属製のケース１１と、を備える。   As shown in FIG. 4, the battery module 10 includes a stacked body 30 in which a plurality of unit cells 32 (six unit cells 32 in this embodiment) are stacked, and a metal case 11 that houses the stacked body 30. And comprising.

（ケース１１）
ケース１１は、積層体３０を収容するケース本体１２と、ケース本体１２の上面に被せ付けられる蓋部１８と、を備える。ケース本体１２は、上面および前側面が開口している。ケース本体１２の後側面の上端には、複数の電線６５をケース１１外に導出する電線導出孔（図示せず）が形成されている。ケース本体１２の前側の開口部には絶縁蓋部材２６が取り付けられている。 (Case 11)
The case 11 includes a case main body 12 that houses the stacked body 30 and a lid portion 18 that covers the upper surface of the case main body 12. The case body 12 has an upper surface and a front side surface that are open. At the upper end of the rear side surface of the case body 12, a wire lead-out hole (not shown) for leading the plurality of wires 65 out of the case 11 is formed. An insulating lid member 26 is attached to the front opening of the case body 12.

蓋部１８は図１に示すように、略長方形状の板状部１９と、板状部１９に対して略垂直下方に連なり、ケース本体１２の上端部に固定される固定部２３と、を備える。板状部１９の中央位置には、内側方向（下側方向）に突出する突出面２０が形成されている。蓋部１８の突出面２０は、最上段（上から１段目）の単電池３２と接触可能とされる。蓋部１８の突出面２０と単電池３２とが接触することにより蓋部１８に単電池３２から生じる熱が伝わって、外部に放熱されるようになっている。   As shown in FIG. 1, the lid portion 18 includes a substantially rectangular plate-like portion 19, and a fixing portion 23 that is connected substantially vertically downward to the plate-like portion 19 and is fixed to the upper end portion of the case body 12. Prepare. A projecting surface 20 that projects inward (downward) is formed at the center of the plate-like portion 19. The protruding surface 20 of the lid portion 18 can be brought into contact with the uppermost unit cell 32 (the first step from the top). When the projecting surface 20 of the lid portion 18 and the unit cell 32 come into contact with each other, heat generated from the unit cell 32 is transmitted to the lid unit 18 and is radiated to the outside.

板状部１９においては、突出面２０よりも外側に、蓋部１８と、積層体３０と、ケース本体１２とを固定するための第１固定部材（図示せず）が配される固定孔２１が貫通して形成されている。固定孔２１の孔径は、第１固定部材の外径よりも小さく形成されている。   In the plate-like portion 19, a fixing hole 21 in which a first fixing member (not shown) for fixing the lid portion 18, the laminated body 30, and the case main body 12 is disposed outside the protruding surface 20. Is formed through. The hole diameter of the fixing hole 21 is smaller than the outer diameter of the first fixing member.

また、板状部１９においては、前端部側に長方形状の孔２２が貫通して形成されている。この孔２２は、前側に取り付けられる絶縁蓋部材２６を係止する蓋係止孔２２とされる。   Further, in the plate-like portion 19, a rectangular hole 22 is formed through the front end portion side. The hole 22 serves as a lid locking hole 22 for locking an insulating lid member 26 attached to the front side.

固定部２３には、略円形をなし、蓋部１８をケース本体１２に固定するための第２固定部材（図示せず）を挿通可能な挿通孔２４が複数（３つ）形成されている。固定部２３はケース本体１２の一対の側面（図１の手前側と奥側に配される面）および後側面の外側に重ねられる。   The fixing portion 23 has a substantially circular shape, and a plurality (three) of insertion holes 24 through which a second fixing member (not shown) for fixing the lid portion 18 to the case body 12 can be inserted. The fixing portion 23 is overlaid on a pair of side surfaces (surfaces disposed on the front side and the back side in FIG. 1) and the outer side of the rear side surface of the case body 12.

ケース本体１２の前側の開口部に取り付けられた絶縁蓋部材２６には、バスバー３８（接続部材の一例）が導出されるバスバー導出口２９Ｂ，２９Ｂが形成されている。   Bus bar outlets 29B and 29B from which a bus bar 38 (an example of a connecting member) is led are formed in the insulating lid member 26 attached to the opening on the front side of the case body 12.

絶縁蓋部材２６の下端部には、図１に示すように、複数の電線６５を導出するための略方形状の切欠部２９Ａが設けられている。この絶縁蓋部材２６は、ケース本体１２の開口部を覆うだけでなく積層体３０の前方の端面側に配されるリード端子３４を絶縁保護する機能を有している。   As shown in FIG. 1, a substantially rectangular cutout 29 </ b> A for leading out the plurality of electric wires 65 is provided at the lower end of the insulating lid member 26. The insulating lid member 26 has a function of not only covering the opening of the case body 12 but also insulating and protecting the lead terminal 34 disposed on the front end face side of the stacked body 30.

（積層体３０）
ケース１１には図２〜図４に示すように、複数の単電池３２を積層してなる積層体３０が収容されている。本実施形態において、積層体３０は、保持部材４０が取り付けられた伝熱板６０に載置した状態の単電池３２（以下「電池ユニット３１」という）を、複数積層してなるものである。 (Laminated body 30)
As shown in FIGS. 2 to 4, the case 11 accommodates a stacked body 30 formed by stacking a plurality of unit cells 32. In the present embodiment, the stacked body 30 is formed by stacking a plurality of unit cells 32 (hereinafter referred to as “battery units 31”) placed on a heat transfer plate 60 to which the holding member 40 is attached.

（単電池３２）
電池ユニット３１において、上面視略長方形状の単電池３２は、図３に示すように、短辺方向の一対の縁部を保持部材４０により保持されるとともに、保持部材４０に取り付けられた伝熱板６０の上に載置されている。 (Single cell 32)
As shown in FIG. 3, in the battery unit 31, the unit cell 32 having a substantially rectangular shape when viewed from above has a pair of edges in the short side direction held by the holding member 40 and heat transfer attached to the holding member 40. It is placed on the plate 60.

図８は上から３段目の電池ユニット３１を上から示した図、図１０は上から６段目の電池ユニット３１を上から示した図であり、図１４は上から３段目の電池ユニット３１の組み立て手順を示す図であり、図１５は上から６段目の電池ユニット３１の組み立て手順を示す図である。   8 is a diagram showing the battery unit 31 in the third stage from the top, FIG. 10 is a diagram showing the battery unit 31 in the sixth stage from the top, and FIG. 14 is a battery in the third stage from the top. It is a figure which shows the assembly procedure of the unit 31, and FIG. 15 is a figure which shows the assembly procedure of the battery unit 31 of the 6th step | paragraph from the top.

各単電池３２は、図８および図１０に示すように、外側面のうち面積の広い面３３Ａを上下に配して、略平行に配置されている。これにより面積の広い面３３Ａが伝熱板６０に接触することとなり放熱性に優れたものとなっている。積層方向において隣り合う単電池３２は、相違する極性のリード端子３４が対向する位置に配されるように配置されている。   As shown in FIGS. 8 and 10, each single battery 32 is arranged substantially in parallel with a surface 33 </ b> A having a large area among the outer surfaces arranged vertically. As a result, the surface 33A having a large area comes into contact with the heat transfer plate 60 and is excellent in heat dissipation. The unit cells 32 that are adjacent in the stacking direction are arranged so that the lead terminals 34 having different polarities face each other.

各単電池３２はラミネート型の電池である。各単電池３２は、図示しない発電要素と、発電要素を包むとともに端部３３Ｂが溶着されたラミネートフィルム３３と、発電要素に接続されるとともにラミネートフィルム３３の溶着された対向する端部３３Ｂ，３３Ｂから外側方向に突出するリード端子３４と、を有する。   Each unit cell 32 is a laminate type battery. Each cell 32 includes a power generation element (not shown), a laminate film 33 that encloses the power generation element and has an end 33B welded thereto, and opposite end portions 33B and 33B that are connected to the power generation element and have the laminate film 33 welded thereto. And a lead terminal 34 protruding outward.

（リード端子３４）
隣り合う単電池３２，３２の極性の相違するリード端子３４，３４は、上から１段目の単電池３２の負極リード端子３４および上から６段目の正極リード端子３４を除き、互いに逆方向に屈曲されるとともに、その端部同士を接触するように重ね合わせて溶接することにより接続されている（図６を参照）。 (Lead terminal 34)
The lead terminals 34 and 34 having different polarities of the adjacent unit cells 32 and 32 are opposite to each other except for the negative electrode lead terminal 34 of the first-stage unit cell 32 from the top and the positive electrode lead terminal 34 of the sixth stage from the top. And are connected by overlapping and welding so that the end portions are in contact with each other (see FIG. 6).

詳しくは、図９に示すように、単電池３２の一方の端部３３Ｂから外側方向に突出するリード端子３４Ｂは、側面視弧状の突部３６を経た後、略垂直上方に屈曲されており、その端部は側面視Ｊ字状をなしている。他方の端部３３Ｂから突出するリード端子３４Ｂ（図示せず）は、側面視弧状の突部３６を経た後、略垂直下方に屈曲されており、その端部は側面視Ｊ字状をなしている。つまり、詳細は図示しないが、上から２〜５段目に配されている単電池３２の一方の縁部３３Ｂから外側方向に突出するリード端子３４Ｂと、他方の縁部３３Ｂから外側方向に突出するリード端子３４Ｂとは、互いに逆方向に屈曲されている。   Specifically, as shown in FIG. 9, the lead terminal 34 </ b> B protruding outward from one end 33 </ b> B of the unit cell 32 is bent substantially vertically upward after passing through the side-arc-shaped protrusion 36. The end portion has a J-shape when viewed from the side. A lead terminal 34B (not shown) protruding from the other end portion 33B is bent substantially vertically downward after passing through a projecting portion 36 having a side view arc shape, and the end portion has a J-shape in side view. Yes. That is, although not shown in detail, the lead terminals 34B projecting outward from one edge 33B of the unit cells 32 arranged in the second to fifth stages from the top, and projecting outward from the other edge 33B. The lead terminals 34B are bent in opposite directions.

隣接する単電池のリード端子３４Ｂに接続されるリード端子３４Ｂ（端子接続端子３４Ｂ）以外のリード端子３４Ａ（上から１段目の負極リード端子３４Ａおよび上から６段目の正極リード端子３４Ａ）には、側面視Ｕ字状の突部３５が形成されており、これらの端子において、Ｕ字状の突部３５よりも末端寄りの部分（端部）は突出方向に対して略平行（直線状）である。   Lead terminals 34A other than the lead terminal 34B (terminal connection terminal 34B) connected to the lead terminal 34B of the adjacent unit cell (the first negative lead terminal 34A from the top and the sixth positive lead lead terminal 34A from the top) Are formed with U-shaped protrusions 35 when viewed from the side, and in these terminals, portions (ends) closer to the ends than the U-shaped protrusions 35 are substantially parallel to the protruding direction (linear shape). ).

これらのリード端子３４Ａ（上から１段目の単電池３２の負極リード端子３４Ａおよび上から６段目の単電池３２の正極リード端子３４Ａ）は、電圧検知端子６６およびバスバー３８に直接重ねられて接続されている（バスバー接続端子３４Ａ）。   These lead terminals 34A (the negative electrode lead terminal 34A of the unit cell 32 at the first stage from the top and the positive electrode lead terminal 34A of the unit cell 32 at the sixth stage from the top) are directly superimposed on the voltage detection terminal 66 and the bus bar 38. Connected (bus bar connection terminal 34A).

なお、各単電池３２の負極のリード端子３４は、詳細は図示しないが、それぞれ電圧検知端子６６に直接重ねられて接続されている。
リード端子３４Ｂに形成された弧状の突部３６は、リード端子３４Ｂ，３４Ｂ間を溶接する際に当該リード端子３４Ｂが受ける応力を緩和する機能を有する。なお、リード端子３４Ａに形成されたＵ字状の突部３５はリード端子３４Ａとバスバー３８とを接続する際にリード端子３４Ａが受ける応力を緩和する機能を有する。 Although not shown in detail, the negative lead terminal 34 of each unit cell 32 is directly overlapped with and connected to the voltage detection terminal 66.
The arc-shaped protrusion 36 formed on the lead terminal 34B has a function of relieving stress received by the lead terminal 34B when welding the lead terminals 34B and 34B. The U-shaped protrusion 35 formed on the lead terminal 34A has a function of relieving stress applied to the lead terminal 34A when the lead terminal 34A and the bus bar 38 are connected.

各リード端子３４においては、図９および図１１に示すように、ラミネートフィルム３３の端部３３Ｂと、突部３５，３６との間に、上下方向に突出し、保持部材４０に係止される係止凸部３７が形成されている。   As shown in FIGS. 9 and 11, each lead terminal 34 protrudes in the vertical direction between the end 33 </ b> B of the laminate film 33 and the protrusions 35 and 36, and is engaged with the holding member 40. A stop convex portion 37 is formed.

リード端子３４のラミネートフィルムの端部３３Ｂ側の領域３４ａは、末端側の領域３４ｂよりも幅広な幅広領域３４ａとされ、この幅広領域３４ａの角部３４ｃが保持部材４０の単電池保持部５１に嵌り込んで、単電池３２の移動が規制されるようになっている。   A region 34 a on the end 33 B side of the laminate film of the lead terminal 34 is a wide region 34 a wider than the region 34 b on the end side, and a corner 34 c of the wide region 34 a is formed on the unit cell holding portion 51 of the holding member 40. The movement of the unit cell 32 is regulated by fitting.

（バスバー３８）
最上段の単電池３２に接続されるバスバー３８（第２バスバー３８Ｂ）は、電池モジュール１０の負極として機能する端子３８Ｂであり、最下段の単電池３２に接続されるバスバー３８は、電池モジュール１０の正極として機能する端子３８Ａ（第１バスバー３８Ａ)である。各バスバー３８は、純アルミ、アルミ合金、銅または銅合金などの導電性材料からなり、絶縁蓋部材２６のバスバー導出口２９Ｂから導出される部分３９が外部機器と接続される端子部３９である。 (Bus bar 38)
The bus bar 38 (second bus bar 38B) connected to the uppermost unit cell 32 is a terminal 38B that functions as the negative electrode of the battery module 10, and the bus bar 38 connected to the lowermost unit cell 32 is connected to the battery module 10. This is a terminal 38A (first bus bar 38A) that functions as a positive electrode. Each bus bar 38 is made of a conductive material such as pure aluminum, aluminum alloy, copper or copper alloy, and a portion 39 led out from the bus bar lead-out port 29B of the insulating lid member 26 is a terminal portion 39 connected to an external device. .

（伝熱板６０）
本実施形態においては、隣り合う単電池３２，３２の間には、アルミニウム製またはアルミニウム合金製の伝熱板６０が配置されている。伝熱板６０の長手方向における一対の側縁には、図２に示すように、上方に起立する起立壁６１が４つずつ間隔をあけて形成されている。この起立壁６１は、積層体３０をケース１１に収容したときにケース１１の内壁面に接触するように配置されて、単電池３２から発生する熱をケース１１に伝導する熱伝導壁６１である。単電池３２から発生した熱は熱伝導壁６１を介してケース１１に伝わり、ケース１１の外に放熱されるようになっている。 (Heat transfer plate 60)
In the present embodiment, a heat transfer plate 60 made of aluminum or aluminum alloy is disposed between the adjacent single cells 32, 32. On the pair of side edges in the longitudinal direction of the heat transfer plate 60, as shown in FIG. 2, four standing walls 61 that stand upward are formed at intervals of four. The upright wall 61 is a heat conducting wall 61 that is disposed so as to contact the inner wall surface of the case 11 when the stacked body 30 is accommodated in the case 11, and conducts heat generated from the unit cell 32 to the case 11. . The heat generated from the unit cell 32 is transmitted to the case 11 through the heat conducting wall 61 and is radiated to the outside of the case 11.

伝熱板６０の長手方向の一対の側縁よりも内側には、図１２に示すように、長手方向の側縁と概ね平行に、図１２における下方に突出する凸部６２Ａと、図１２における上方に突出する凹部６２Ｂとが交互に形成されている。単電池３２を被覆するラミネートフィルム３３の端縁からは、ラミネートフィルム３３の内側に配されている金属製の被覆材が露出することがあるが、伝熱板６０に形成された凸部６２Ａと凹部６２Ｂにより単電池３２のラミネートフィルム３３の端縁が伝熱板６０に接触しないようになっている。これにより単電池３２の短絡を防止している。   On the inner side of the pair of side edges in the longitudinal direction of the heat transfer plate 60, as shown in FIG. 12, a convex portion 62A projecting downward in FIG. 12 substantially parallel to the side edges in the longitudinal direction, and in FIG. Recesses 62B protruding upward are alternately formed. From the edge of the laminate film 33 that covers the unit cell 32, the metal coating material disposed inside the laminate film 33 may be exposed, but the protrusion 62 </ b> A formed on the heat transfer plate 60 and The recess 62 </ b> B prevents the edge of the laminate film 33 of the unit cell 32 from contacting the heat transfer plate 60. Thereby, the short circuit of the cell 32 is prevented.

伝熱板６０は、図１２及び図１３に示すように、短辺方向の両側縁に係止孔６３Ａが形成された突出片６３を２つずつ（合計４つ）有している。伝熱板６０を保持部材４０に対してスライド移動させることにより、伝熱板６０の係止孔６３Ａに保持部材４０の伝熱板係止部４４が係止されるようになっている。   As shown in FIGS. 12 and 13, the heat transfer plate 60 has two protruding pieces 63 each having a locking hole 63 </ b> A formed on both side edges in the short side direction (four in total). By sliding the heat transfer plate 60 with respect to the holding member 40, the heat transfer plate locking portion 44 of the holding member 40 is locked in the locking hole 63 </ b> A of the heat transfer plate 60.

（保持部材４０）
各単電池３２は、絶縁樹脂製の保持部材４０により、伝熱板６０の上に載置された状態で保持されている。保持部材４０は、単電池３２のリード端子３４が突出された対向する端部３３Ｂ，３３Ｂに、それぞれ配されている。 (Holding member 40)
Each unit cell 32 is held in a state of being placed on the heat transfer plate 60 by a holding member 40 made of an insulating resin. The holding member 40 is arranged on each of the opposing end portions 33B and 33B from which the lead terminal 34 of the unit cell 32 is projected.

さて、本実施形態において、上下方向において重なりあう保持部材４０のうち、一方の保持部材４０には、他方の保持部材４０側に突出するとともに、内側方向に突出する係止爪４１Ａが形成された係合突部４１（係合部の一例）が設けられ、他方の保持部材４０には、係合突部４１を受け入れる凹み形状をなすとともに、係止爪４１Ａを係止する係止突部４２Ａが形成された係合受け部４２（被係合部の一例）が設けられている。係合突部４１と係合受け部４２は相互に係合する構造となっている。具体的には、以下のとおりである。   In the present embodiment, among the holding members 40 that overlap in the vertical direction, one holding member 40 is formed with a locking claw 41A that protrudes toward the other holding member 40 and protrudes in the inner direction. An engaging protrusion 41 (an example of an engaging part) is provided, and the other holding member 40 has a recessed shape for receiving the engaging protrusion 41 and a locking protrusion 42A for locking the locking claw 41A. An engagement receiving portion 42 (an example of an engaged portion) in which is formed is provided. The engaging protrusion 41 and the engagement receiving portion 42 are structured to engage with each other. Specifically, it is as follows.

上から２段目の前方に配置される保持部材４０Ｂの２つの側面には、それぞれ係合突部４１が設けられる一方、上から１段目の前方に配置される保持部材４０Ａの２つの側面には、上から２段目の前方の保持部材４０Ｂに設けられた係合突部４１と相互に係合する係合受け部４２がそれぞれ設けられている（図４および図５参照）。   Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40B disposed in front of the second stage from the top, while the two side surfaces of the holding member 40A disposed in front of the first stage from the top. Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40B in the second stage from the top (see FIGS. 4 and 5).

上から３段目の前方に配置される保持部材４０Ｃの前側面には、２つの係合突部４１が設けられる一方、上から２段目の前方に配置される保持部材４０Ｂの前側面には、上から３段目の前方の保持部材４０Ｃに設けられた各係合突部４１と相互に係合する係合受け部４２が設けられている（図６および図７参照）。   Two engaging protrusions 41 are provided on the front side surface of the holding member 40C arranged in front of the third step from the top, while the front side surface of the holding member 40B arranged in front of the second step from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40C in the third step from the top (see FIGS. 6 and 7).

上から４段目の前方に配置される保持部材４０Ｄの２つの側面には、それぞれ係合突部４１が設けられる一方、上から３段目の前方に配置される保持部材４０Ｃの２つの側面には、上から４段目の前方の保持部材４０Ｄに設けられた係合突部４１と相互に係合する係合受け部４２がそれぞれ設けられている（図４および図５参照）。   Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40D arranged in front of the fourth step from the top, while the two side surfaces of the holding member 40C arranged in front of the third step from the top Are provided with engagement receiving portions 42 that are engaged with the engagement protrusions 41 provided on the holding member 40D in the fourth stage from the top (see FIGS. 4 and 5).

上から５段目の前方に配置される保持部材４０Ｅの前側面には、２つの係合突部４１が設けられる一方、上から４段目の前方に配置される保持部材４０Ｄの前側面には、上から５段目の前方の保持部材４０Ｅに設けられた各係合突部４１と相互に係合する係合受け部４２が設けられている（図６および図７参照）。   Two engaging protrusions 41 are provided on the front side surface of the holding member 40E arranged in front of the fifth step from the top, while on the front side surface of the holding member 40D arranged in front of the fourth step from the top. Are provided with engagement receiving portions 42 that mutually engage with the respective engagement protrusions 41 provided on the front holding member 40E at the fifth stage from the top (see FIGS. 6 and 7).

上から６段目の前方に配置される保持部材４０Ｆの２つの側面には、それぞれ係合突部４１が設けられる一方、上から５段目の前方に配置される保持部材４０Ｅの２つの側面には、上から６段目の前方の保持部材４０Ｆに設けられた係合突部４１と相互に係合する係合受け部４２がそれぞれ設けられている（図４および図５参照）。   Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40F arranged in front of the sixth step from the top, while the two side surfaces of the holding member 40E arranged in front of the fifth step from the top Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40F in the sixth step from the top (see FIGS. 4 and 5).

上から２段目の後方に配置される保持部材４０Ｈの後側面には、２つの係合突部４１が設けられる一方、上から１段目の後方に配置される保持部材４０Ｇの後側面には、上から２段目の後方の保持部材４０Ｈに設けられた各係合突部４１と相互に係合する係合受け部４２が設けられている（図７参照）。   Two engaging protrusions 41 are provided on the rear side surface of the holding member 40H arranged at the rear of the second stage from the top, while on the rear side surface of the holding member 40G arranged at the rear of the first stage from the top. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40H at the second stage from the top (see FIG. 7).

上から３段目の後方に配置される保持部材４０Ｉの２つの側面には、それぞれ係合突部４１が設けられる一方、上から２段目の後方に配置される保持部材４０Ｈの２つの側面には、上から３段目の後方の保持部材４０Ｉに設けられた係合突部４１と相互に係合する係合受け部４２がそれぞれ設けられている（図４参照）。   Engaging protrusions 41 are provided on the two side surfaces of the holding member 40I arranged at the rear of the third step from the top, respectively, while the two side surfaces of the holding member 40H arranged at the rear of the second step from the top are provided. Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40I at the rear of the third row from the top (see FIG. 4).

上から４段目の後方に配置される保持部材４０Ｊの後側面には、２つの係合突部４１が設けられる一方、上から３段目の後方に配置される保持部材４０Ｉの後側面には、上から４段目の後方の保持部材４０Ｊに設けられた各係合突部４１と相互に係合する係合受け部４２が設けられている（図７参照）。   Two engaging protrusions 41 are provided on the rear side surface of the holding member 40J arranged at the rear of the fourth stage from the top, while the rear side surface of the holding member 40I arranged at the rear of the third stage from the top is provided. Is provided with an engagement receiving portion 42 that mutually engages with each of the engagement protrusions 41 provided on the holding member 40J at the rear of the fourth stage from the top (see FIG. 7).

上から５段目の後方に配置される保持部材４０Ｋの２つの側面には、それぞれ係合突部４１が設けられる一方、上から４段目の後方に配置される保持部材４０Ｊの２つの側面には、上から５段目の後方の保持部材４０Ｋに設けられた係合突部４１と相互に係合する係合受け部４２がそれぞれ設けられている（図４参照）。   Engaging protrusions 41 are respectively provided on the two side surfaces of the holding member 40K disposed at the rear of the fifth step from the top, while the two side surfaces of the holding member 40J disposed at the rear of the fourth step from the top Are provided with engagement receiving portions 42 that mutually engage with the engagement protrusions 41 provided on the holding member 40K at the rear of the fifth stage from the top (see FIG. 4).

上から６段目の後方に配置される保持部材４０Ｌの後側面には、２つの係合突部４１が設けられる一方、上から５段目の後方に配置される保持部材４０Ｋの後側面には、上から６段目の後方の保持部材４０Ｌに設けられた各係合突部４１と相互に係合する係合受け部４２が設けられている（図７参照）。   Two engaging protrusions 41 are provided on the rear side surface of the holding member 40L disposed at the rear of the sixth stage from the top, while the rear side surface of the holding member 40K disposed at the rear of the fifth stage from the top. Are provided with engagement receiving portions 42 that mutually engage with the respective engagement protrusions 41 provided on the holding member 40L at the rear of the sixth stage from the top (see FIG. 7).

保持部材４０の係合突部４１は、当該保持部材４０と重なり合う保持部材４０の係合受け部４２の内部に嵌り込むようになっていて、複数の保持部材４０を重ねて係合状態とすると、係合突部４１および係合受け部４２はともに、保持部材４０の外側に突出しないようになっていて省スペースである。   The engaging protrusion 41 of the holding member 40 is adapted to fit inside the engagement receiving portion 42 of the holding member 40 that overlaps the holding member 40, and the plurality of holding members 40 are overlapped to be in an engaged state. Both the engagement protrusion 41 and the engagement receiving part 42 do not protrude to the outside of the holding member 40 and are space-saving.

また、上から２段目〜５段目の保持部材４０Ｂ，４０Ｃ，４０Ｄ，４０Ｅ，４０Ｈ，４０Ｉ，４０Ｊ，４０Ｋは、それぞれ、係合突部４１と係合受け部４２を２つずつ有している。つまり、上から２段目〜５段目の保持部材４０Ｂ，４０Ｃ，４０Ｄ，４０Ｅ，４０Ｈ，４０Ｉ，４０Ｊ，４０Ｋは、上に重ねられる保持部材４０と２か所で係合しており、下に配される保持部材４０と２か所で係合している。   Each of the second to fifth holding members 40B, 40C, 40D, 40E, 40H, 40I, 40J, and 40K from the top has two engagement protrusions 41 and two engagement receiving portions 42, respectively. ing. That is, the second to fifth holding members 40B, 40C, 40D, 40E, 40H, 40I, 40J, and 40K from the top are engaged with the holding member 40 that is overlaid at two locations, and the bottom Is engaged with the holding member 40 arranged at two locations.

上から１段目の保持部材４０Ａ，４０Ｇは、それぞれ係合受け部４２を２つずつ有しており、下に配される保持部材４０Ｂ，４０Ｈと２か所で係合している。上から６段目の保持部材４０Ｆ，４０Ｌは、それぞれ係合突部４１を２つずつ有しており上に重ねられる保持部材４０Ｅ，４０Ｋと２か所で係合している。   The holding members 40A and 40G in the first stage from the top each have two engagement receiving portions 42, and are engaged with the holding members 40B and 40H arranged below at two locations. The holding members 40F and 40L in the sixth stage from the top each have two engaging protrusions 41 and are engaged at two locations with the holding members 40E and 40K stacked on top.

また、本実施形態では、図２および図７に示すように、複数の電池ユニット３１を積層したときに、上下方向において隣り合う保持部材４０，４０間に、図４に示すように、空間Ｓが形成されるようになっている、
詳しくは、上から２段目の前方に配置される保持部材４０Ｂの下側面と、上から３段目の前方に配置される保持部材４０Ｃの上側面はともに凹んだ形状をなしており、これら２つの保持部材４０Ｂ，４０Ｃを重ね合わせると、保持部材４０Ｂ，４０Ｃ間に単電池３２のラミネートフィルム３３の短辺方向に対し略平行に貫通する空間Ｓが形成される。 Moreover, in this embodiment, as shown in FIG. 2 and FIG. 7, when a plurality of battery units 31 are stacked, a space S is formed between the holding members 40, 40 adjacent in the vertical direction as shown in FIG. 4. Is supposed to be formed,
Specifically, the lower side surface of the holding member 40B disposed in front of the second stage from the top and the upper side surface of the holding member 40C disposed in front of the third stage from the top are both recessed. When the two holding members 40B and 40C are overlapped, a space S penetrating substantially parallel to the short side direction of the laminate film 33 of the unit cell 32 is formed between the holding members 40B and 40C.

同様に、上から４段目の前方に配置される保持部材４０Ｄと上から５段目の前方に配置される保持部材４０Ｅとの間、上から１段目の後方に配置される保持部材４０Ｇと上から２段目の後方に配置される保持部材４０Ｈとの間、上から３段目の後方に配置される保持部材４０Ｉと上から４段目の後方に配置される保持部材４０Ｊとの間、上から５段目の後方に配置される保持部材４０Ｋと上から６段目の後方に配置される保持部材４０Ｌとの間にも、それぞれ、空間Ｓが形成される。   Similarly, the holding member 40G disposed between the holding member 40D disposed in front of the fourth stage from the top and the holding member 40E disposed in front of the fifth stage from the top, and the rear of the first stage from the top. And a holding member 40H arranged behind the third stage from the top, a holding member 40I arranged behind the third stage from the top, and a holding member 40J arranged behind the fourth stage from the top A space S is also formed between the holding member 40K arranged at the rear of the fifth stage from the top and the holding member 40L arranged at the rear of the sixth stage from the top.

上下方向において隣り合う保持部材４０，４０の間の空間Ｓには、上下方向において、隣り合う極性の相違するリード端子３４Ｂ，３４Ｂの接続部３６Ｂが配されている。この空間Ｓには、隣り合う極性の相違するリード端子３４Ｂ，３４Ｂを溶接する際の治具（図示せず）が挿入可能であり、保持部材４０の図２の手前側の側面または奥側の側面が治具を空間Ｓに挿入する挿入口７１とされる。   In the space S between the holding members 40 adjacent to each other in the vertical direction, connection portions 36B of the lead terminals 34B and 34B having different polarities adjacent to each other in the vertical direction are arranged. In this space S, a jig (not shown) for welding adjacent lead terminals 34B, 34B having different polarities can be inserted, and the holding member 40 on the side surface or the back side in FIG. The side surface is an insertion port 71 for inserting the jig into the space S.

各保持部材４０には、第１固定部材を挿通可能な２つの貫通孔４３が貫通して設けられている。各保持部材４０の下側面には、伝熱板６０の係止孔６３Ａに係止される伝熱板係止部４４が設けられている（図１３を参照）。   Each holding member 40 is provided with two through holes 43 through which the first fixing member can be inserted. On the lower surface of each holding member 40, a heat transfer plate locking portion 44 that is locked in the locking hole 63A of the heat transfer plate 60 is provided (see FIG. 13).

各保持部材４０の上側面には、リード端子３４を配置して保持する端子配置部４５が形成されており、この端子配置部４５には、リード端子３４の係止凸部３７を受け入れて係止する係止溝４６が設けられている（図９および図１１を参照）。係止溝４６はリード端子３４を係止して単電池３２を位置決めする機能を有する。   A terminal arrangement part 45 for arranging and holding the lead terminals 34 is formed on the upper side surface of each holding member 40. The terminal arrangement part 45 receives and engages with a locking projection 37 of the lead terminal 34. A locking groove 46 for stopping is provided (see FIGS. 9 and 11). The locking groove 46 has a function of locking the lead terminal 34 and positioning the unit cell 32.

各保持部材４０の端子配置部４５と隣接した領域に端子配置部４５よりも厚み寸法を大きく設定した肉厚領域５２が設けられており、この肉厚領域５２に、リード端子３４の幅広領域３４ａの角部３４ｃが嵌り込む凹状の単電池保持部５１が形成されている。この単電池保持部５１により、リード端子３４（単電池３２）は移動を規制される。   A thick area 52 having a thickness dimension larger than that of the terminal arrangement section 45 is provided in an area adjacent to the terminal arrangement section 45 of each holding member 40, and the wide area 34 a of the lead terminal 34 is provided in the thick area 52. A concave unit cell holding portion 51 into which the corner portion 34c of the second portion is fitted is formed. The movement of the lead terminal 34 (unit cell 32) is restricted by the unit cell holding portion 51.

保持部材４０Ｃ，４０Ｅ，４０Ｈ，４０Ｊには、リード端子３４同士を接続した接続部３６Ａの周囲を取り囲んで他の接続部３６Ａや他のリード端子３４との接触を防止し絶縁する絶縁壁部５４が形成されている（図２等を参照）。   The holding members 40C, 40E, 40H, and 40J include an insulating wall portion 54 that surrounds the periphery of the connecting portion 36A that connects the lead terminals 34 and prevents and insulates the other connecting portions 36A and other lead terminals 34 from contacting each other. (See FIG. 2 and the like).

また、保持部材４０Ａ，４０Ｃ，４０Ｅ，４０Ｆ，４０Ｈ，４０Ｊ，４０Ｌには、それぞれ、電圧検知端子６６が保持される端子保持部４７と、電圧検知端子６６に接続された電線６５を収容する電線収容溝４８と、が設けられている。電線収容溝４８には電線６５の電圧検知端子６６により圧着された圧着部６５Ａも保持されるようになっている。   The holding members 40A, 40C, 40E, 40F, 40H, 40J, and 40L each include a terminal holding portion 47 that holds the voltage detection terminal 66 and an electric wire that houses the electric wire 65 connected to the voltage detection terminal 66. A housing groove 48 is provided. A crimping portion 65 </ b> A crimped by a voltage detection terminal 66 of the electric wire 65 is also held in the electric wire receiving groove 48.

保持部材４０Ａ，４０Ｃ，４０Ｅ，４０Ｆ，４０Ｈ，４０Ｊ，４０Ｌの端子保持部４７に、それぞれ保持される電圧検知端子６６は、図９および図１１に示すように、その上面（一面）がリード端子３４の下側面（表面の一例）と同一線上（Ｘ−Ｘ線上、Ｙ−Ｙ線上）となる位置に保持されている。   As shown in FIGS. 9 and 11, the upper surface (one surface) of the voltage detection terminal 66 held in the terminal holding portion 47 of each of the holding members 40A, 40C, 40E, 40F, 40H, 40J, and 40L is a lead terminal. 34 is held at a position that is on the same line (on the XX line and on the YY line) with the lower surface (an example of the surface).

さらに、保持部材４０Ａ，４０Ｆには、それぞれ、バスバー３８を保持するバスバー保持部４９（接続部材保持部の一例）も設けられている。バスバー保持部４９には、バスバー３８が嵌めこまれる凹み部４９Ａと、凹み部４９Ａに嵌めこまれたバスバー３８を抜け止めする複数の抜け止め突部４９Ｂとが形成されている。   Furthermore, the holding members 40A and 40F are each provided with a bus bar holding portion 49 (an example of a connection member holding portion) that holds the bus bar 38. The bus bar holding portion 49 is formed with a recessed portion 49A into which the bus bar 38 is fitted, and a plurality of retaining projections 49B that retain the bus bar 38 fitted into the recessed portion 49A.

保持部材４０Ａ，４０Ｆのバスバー保持部４９に保持されているバスバー３８は、図１１に示すように、その上面（一面）がリード端子３４の下側面（表面の一例）と同一線上（Ｙ−Ｙ線上）となる位置に保持されている。   As shown in FIG. 11, the upper surface (one surface) of the bus bar 38 held by the bus bar holding portion 49 of the holding members 40A and 40F is collinear with the lower surface (an example of the surface) of the lead terminal 34 (YY On the line).

各保持部材４０にはその保持部材４０あるいは別の保持部材４０に取り付けられた電線６５を通す電線通し部５３が形成されている。上から１段目の後方に配される保持部材４０Ｇ以外の保持部材４０の電線通し部５３は保持部材４０の一部を切り欠いた溝状の部分であり、ケース１１内に収容されるが、保持部材４０Ｇの電線通し部５３は、ケース本体１２の後側面の上端に形成された電線導出孔からケース１１外に突出するように配置される。保持部材４０Ｇの電線通し部５３からは、複数本の電線６５がケース１１の外部に導出される。   Each holding member 40 is formed with an electric wire passage portion 53 through which an electric wire 65 attached to the holding member 40 or another holding member 40 is passed. The wire passing portion 53 of the holding member 40 other than the holding member 40G arranged at the rear of the first stage from the top is a groove-like portion in which a part of the holding member 40 is cut out, and is accommodated in the case 11. The electric wire passing portion 53 of the holding member 40G is disposed so as to protrude out of the case 11 from an electric wire outlet hole formed at the upper end of the rear side surface of the case main body 12. A plurality of electric wires 65 are led out of the case 11 from the electric wire passage portion 53 of the holding member 40G.

上から６段目の保持部材４０Ｆ，４０Ｌにおいて、係止溝４６は上面のみに設けられているが、これら以外の保持部材４０においては、係止溝４６は上下面にそれぞれ設けられている。   In the holding members 40F and 40L in the sixth stage from the top, the locking grooves 46 are provided only on the upper surface, but in the other holding members 40, the locking grooves 46 are provided on the upper and lower surfaces, respectively.

また、上から１段目の後方に配される保持部材４０Ｇには、積層体保持部材（図示せず）を係止する係止孔５０Ａと、積層体保持部材が取付られる取付凹部５０Ｂとが、設けられている。積層体保持部材は、積層体３０の後方の端面側に配されるリード端子３４の接続部３６Ａとケース１１との間に配され、リード端子３４を絶縁保護する。   Further, the holding member 40G arranged at the rear of the first stage from the top has a locking hole 50A for locking a laminated body holding member (not shown) and an attachment recess 50B to which the laminated body holding member is attached. , Provided. The multilayer body holding member is disposed between the connection portion 36 </ b> A of the lead terminal 34 disposed on the rear end face side of the multilayer body 30 and the case 11, and insulates and protects the lead terminal 34.

（本実施形態の電池モジュール１０の組み立て方法）
次に本実施形態の電池モジュール１０の組み立て方法について説明する。所定形状のリード端子３４を備える単電池３２を合計６個準備する。 (Assembly method of battery module 10 of this embodiment)
Next, a method for assembling the battery module 10 of the present embodiment will be described. A total of six unit cells 32 including lead terminals 34 having a predetermined shape are prepared.

６枚の伝熱板６０の端部に対応する保持部材４０をそれぞれ取り付ける。具体的には、伝熱板６０に保持部材４０Ａと保持部材４０Ｇを取り付けたもの、伝熱板６０に保持部材４０Ｂと保持部材４０Ｈを取り付けたもの、伝熱板６０に保持部材４０Ｃと保持部材４０Ｉを取り付けたもの、伝熱板６０に保持部材４０Ｄと保持部材４０Ｊを取り付けたもの、伝熱板６０に保持部材４０Ｅと保持部材４０Ｋを取り付けたもの、伝熱板６０に保持部材４０Ｆと保持部材４０Ｌを取り付けたものを作製する。伝熱板６０に保持部材を取り付ける作業は、伝熱板６０を保持部材４０に対してスライド移動させて、伝熱板６０の係止孔６３Ａに保持部材４０の伝熱板係止部４４を係止させることにより実行することができる。   The holding members 40 corresponding to the end portions of the six heat transfer plates 60 are respectively attached. Specifically, the heat transfer plate 60 with the holding member 40A and the holding member 40G attached, the heat transfer plate 60 with the holding member 40B and the holding member 40H attached, the heat transfer plate 60 with the holding member 40C and the holding member 40I attached, heat transfer plate 60 with holding member 40D and holding member 40J attached, heat transfer plate 60 with holding member 40E and holding member 40K attached, heat transfer plate 60 with holding member 40F and holding A member to which the member 40L is attached is produced. The operation of attaching the holding member to the heat transfer plate 60 is performed by sliding the heat transfer plate 60 with respect to the holding member 40 and attaching the heat transfer plate locking portion 44 of the holding member 40 to the locking hole 63A of the heat transfer plate 60. It can be executed by locking.

次に、２つずつ保持部材４０が取り付けられた伝熱板６０の所定位置に、コネクタ６４が接続された電圧検知端子６６と、バスバー３８を取り付ける。   Next, the voltage detection terminal 66 to which the connector 64 is connected and the bus bar 38 are attached to predetermined positions of the heat transfer plate 60 to which the holding member 40 is attached two by two.

詳しくは、保持部材４０Ａ，４０Ｃ，４０Ｅ，４０Ｈ，４０Ｊ，４０Ｆ，４０Ｌの電線収容溝４８に、コネクタ６４に接続された電線６５を収容するとともに、保持部材４０Ａ，４０Ｆのバスバー保持部４９に、それぞれバスバー３８を取り付ける（図１４及び図１５を参照）。   Specifically, the electric wire 65 connected to the connector 64 is accommodated in the electric wire accommodation groove 48 of the holding members 40A, 40C, 40E, 40H, 40J, 40F, and 40L, and the bus bar holding portion 49 of the holding members 40A and 40F Each bus bar 38 is attached (see FIGS. 14 and 15).

コネクタ６４に接続された電線６５の取り付け作業は、保持部材４０の端子保持部４７に電圧検知端子６６を嵌めこんで取り付け、電線収容溝４８に電線６５を収容することにより実行することができる。   The attachment work of the electric wire 65 connected to the connector 64 can be performed by fitting the voltage detection terminal 66 into the terminal holding portion 47 of the holding member 40 and attaching the electric wire 65 in the electric wire accommodation groove 48.

バスバー３８の取り付け作業は、以下のように行う。バスバー保持部４９の凹み部４９Ａに、バスバー３８を差し込むと、バスバー３８と抜け止め突部４９Ｂが当接して、抜け止め突部４９Ｂが外側方向にたわみ変形する。バスバー３８が凹み部４９Ａに嵌めこまれると、抜け止め突部４９Ｂが弾性復帰して、バスバー３８の上方への移動を規制し抜け止め状態となる。
次に、伝熱板６０の上に、単電池３２を載置する。 The work of attaching the bus bar 38 is performed as follows. When the bus bar 38 is inserted into the recessed portion 49A of the bus bar holding portion 49, the bus bar 38 and the retaining projection 49B come into contact with each other, and the retaining projection 49B bends and deforms outward. When the bus bar 38 is fitted into the recess 49A, the retaining protrusion 49B is elastically restored, restricting the upward movement of the bus bar 38 and becoming a retaining state.
Next, the unit cell 32 is placed on the heat transfer plate 60.

保持部材４０Ａと保持部材４０Ｇを取り付けた伝熱板６０に、単電池３２を載置すると上から１段目の電池ユニット３１Ａが得られる。保持部材４０Ｂと保持部材４０Ｈを取り付けた伝熱板６０に、単電池３２を載置すると上から２段目の電池ユニット３１Ｂが得られる。保持部材４０Ｃと保持部材４０Ｉを取り付けた伝熱板６０に、単電池３２を載置すると上から３段目の電池ユニット３１Ｃが得られる。保持部材４０Ｄと保持部材４０Ｊを取り付けた伝熱板６０に、単電池３２を載置すると上から４段目の電池ユニット３１Ｄが得られる。保持部材４０Ｅと保持部材４０Ｋを取り付けた伝熱板６０に、単電池３２を載置すると上から５段目の電池ユニット３１Ｅが得られる。保持部材４０Ｆと保持部材４０Ｌを取り付けた伝熱板６０に、単電池３２を載置すると上から６段目の電池ユニット３１Ｆが得られる。   When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40A and the holding member 40G are attached, the first-stage battery unit 31A from the top is obtained. When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40B and the holding member 40H are attached, the battery unit 31B in the second stage from the top is obtained. When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40C and the holding member 40I are attached, a battery unit 31C in the third stage from the top is obtained. When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40D and the holding member 40J are attached, a battery unit 31D in the fourth stage from the top is obtained. When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40E and the holding member 40K are attached, the battery unit 31E at the fifth stage from the top is obtained. When the unit cell 32 is placed on the heat transfer plate 60 to which the holding member 40F and the holding member 40L are attached, the sixth-stage battery unit 31F from the top is obtained.

伝熱板６０に単電池３２を載置するときには、各リード端子３４の係止凸部３７が、端子配置部４５の係止溝４６に嵌るようにするとともに、各リード端子３４の角部３３ｃが、各保持部材４０の単電池保持部５１に嵌るように単電池３２を伝熱板６０に載置する。すると、単電池３２のリード端子３４が係止溝４６により係止されることで単電池３２の位置ずれが防止されるとともに、単電池３２が単電池保持部５１により移動を規制される。   When the single battery 32 is placed on the heat transfer plate 60, the locking projections 37 of the lead terminals 34 are fitted in the locking grooves 46 of the terminal arrangement portions 45, and the corners 33 c of the lead terminals 34. However, the unit cell 32 is placed on the heat transfer plate 60 so as to fit into the unit cell holding part 51 of each holding member 40. Then, the lead terminal 34 of the cell 32 is locked by the locking groove 46, thereby preventing the position shift of the cell 32 and the movement of the cell 32 is restricted by the cell holding part 51.

隣り合うリード端子３４，３４同士の接続部３６Ａの周縁には保持部材４０の絶縁壁部５４が配置されるので、これにより、隣り合うリード端子３４，３４同士の接続部３６Ａも絶縁状態で保持される。   Since the insulating wall portion 54 of the holding member 40 is disposed at the periphery of the connecting portion 36A between the adjacent lead terminals 34, 34, the connecting portion 36A between the adjacent lead terminals 34, 34 is also held in an insulated state. Is done.

そして各電池ユニット３１においては、保持部材４０の端子保持部４７に保持されている電圧検知端子６６の上面と、単電池３２のリード端子３４の下側面が同一線上に配されて電圧検知端子６６とリード端子３４とが面接触する（図９および図１１を参照）。特に、電池ユニット３１Ａ，３１Ｆにおいては、保持部材４０の端子保持部４７に保持されている電圧検知端子６６の上面と、バスバー３８の上面と、単電池３２のリード端子３４の下側面とが同一線上に配されて、電圧検知端子６６およびバスバー３８が、リード端子３４と面接触する（図１１を参照）。   In each battery unit 31, the upper surface of the voltage detection terminal 66 held by the terminal holding portion 47 of the holding member 40 and the lower surface of the lead terminal 34 of the unit cell 32 are arranged on the same line, and the voltage detection terminal 66. And the lead terminal 34 are in surface contact (see FIGS. 9 and 11). In particular, in the battery units 31 </ b> A and 31 </ b> F, the upper surface of the voltage detection terminal 66 held by the terminal holding portion 47 of the holding member 40, the upper surface of the bus bar 38, and the lower surface of the lead terminal 34 of the unit cell 32 are the same. Arranged on the line, the voltage detection terminal 66 and the bus bar 38 are in surface contact with the lead terminal 34 (see FIG. 11).

電圧検知端子６６およびバスバー３８を、リード端子３４とレーザー溶接により接合すると電池ユニット３１が得られる。   When the voltage detection terminal 66 and the bus bar 38 are joined to the lead terminal 34 by laser welding, the battery unit 31 is obtained.

６つの電池ユニット３１を最下段から順に積層する。下から２段目（上から５段目）に配される保持部材４０の係合受け部４２を、最下段（上から６段目）に配される保持部材４０に形成された係合突部４１に対応するように配して、電池ユニット３１を積層する。   Six battery units 31 are stacked in order from the bottom. The engagement receiving portion 42 of the holding member 40 arranged in the second step from the bottom (the fifth step from the top) is formed with the engagement protrusion formed in the holding member 40 arranged in the bottom step (the sixth step from the top). The battery units 31 are stacked so as to correspond to the portions 41.

上側に配される保持部材４０を下方に移動させると、係合突部４１が係合受け部４２の内部に嵌り込み、係合突部４１の係止爪４１Ａが係合受け部４２内の係止突部４２Ａに当接すると、係合突部４１の移動が規制され係合突部４１と係合受け部４２とが相互に係合する。   When the holding member 40 disposed on the upper side is moved downward, the engaging projection 41 is fitted into the engagement receiving portion 42, and the locking claw 41 </ b> A of the engagement protruding portion 41 is within the engagement receiving portion 42. When contacting the locking projection 42A, the movement of the engagement projection 41 is restricted, and the engagement projection 41 and the engagement receiving portion 42 are engaged with each other.

同様の作業を繰り返して６つの電池ユニット３１を積層すると、上下方向において重なりあう保持部材４０の一方の係合突部４１と他方の係合受け部４２とが相互に係合して一体化され、図２に示すような積層体３０が得られる。このとき６段に積層された保持部材４０の貫通孔４３が重なって、１つの貫通した孔となるとともに隣り合う保持部材４０，４０間に空間Ｓが形成される。電池ユニット３１を積層する際にコネクタ６４も積層し一体化しておく。   When six battery units 31 are stacked by repeating the same operation, one engagement protrusion 41 and the other engagement receiving portion 42 of the holding member 40 that overlap in the vertical direction are mutually engaged and integrated. A laminated body 30 as shown in FIG. 2 is obtained. At this time, the through holes 43 of the holding members 40 stacked in six steps are overlapped to form one through hole, and a space S is formed between the adjacent holding members 40 and 40. When the battery unit 31 is stacked, the connector 64 is also stacked and integrated.

次に、上下に隣り合う保持部材４０，４０の間の挿入口７１から空間Ｓ内に溶接用の治具を挿入して、上下方向において、隣り合う２つのリード端子３４Ｂ，３４Ｂの端部（直線状の部分）同士を接合する。２つのリード端子３４Ｂ，３４Ｂの端部を重ねた部分をリード端子３４の突出する方向に対し交差する方向に挿入した一対の治具で挟んで、レーザー光を照射することにより溶接することで、隣り合う極性の相違するリード端子３４Ｂ，３４Ｂ同士を接続する。   Next, a welding jig is inserted into the space S from the insertion port 71 between the holding members 40 adjacent to each other in the vertical direction, and the ends of the two lead terminals 34B, 34B adjacent to each other in the vertical direction ( The straight portions are joined together. By sandwiching a portion where the ends of the two lead terminals 34B and 34B overlap with each other with a pair of jigs inserted in a direction intersecting the protruding direction of the lead terminal 34, welding is performed by irradiating with laser light. Adjacent lead terminals 34B and 34B having different polarities are connected to each other.

このようにして得られた積層体３０の後方の端面側に積層体保持部材を取り付けて積層体３０を保持状態とする。   A laminated body holding member is attached to the rear end face side of the laminated body 30 obtained in this way, and the laminated body 30 is brought into a holding state.

次に、積層体３０の後側から導出されるコネクタ付き電線６５を、ケース本体１２の後側面の上端に形成した電線導出孔から導出させて、積層体３０をケース本体１２に収容する。積層体３０をケース本体１２内に収容すると熱伝導壁６１がケース本体１２の内壁面１２Ａに接触するように配される。   Next, the connector-attached electric wire 65 led out from the rear side of the laminated body 30 is led out from the electric wire outlet hole formed in the upper end of the rear side surface of the case main body 12, and the laminated body 30 is accommodated in the case main body 12. When the laminated body 30 is accommodated in the case main body 12, the heat conducting wall 61 is arranged so as to contact the inner wall surface 12 </ b> A of the case main body 12.

次に、絶縁蓋部材２６をケース本体１２の前側の開口部に取り付ける。具体的には、絶縁蓋部材２６の切欠部２９Ａから積層体３０の前側から導出されるコネクタ付き電線６５を導出させるとともに、絶縁蓋部材２６のバスバー導出口２９Ｂからバスバー３８を導出させるようにして、絶縁蓋部材２６をケース本体１２に取り付ける。次に、蓋部１８をケース本体１２の上面を覆うように被せ付けると、図１に示すような、電池モジュール１０が得られる。   Next, the insulating lid member 26 is attached to the opening on the front side of the case body 12. Specifically, the electric wire with connector 65 led out from the front side of the laminated body 30 is led out from the notch 29A of the insulating lid member 26, and the bus bar 38 is led out from the bus bar outlet 29B of the insulating lid member 26. The insulating lid member 26 is attached to the case body 12. Next, when the lid 18 is placed so as to cover the upper surface of the case body 12, the battery module 10 as shown in FIG. 1 is obtained.

次に、蓋部１８とケース本体１２の底壁部との間において、積層体３０の端部に配されている保持部材４０の貫通孔４３に第１固定部材を貫通させた状態で、図示しない治具に蓋部１８の固定孔２１、中空の第１固定部材およびケース本体１２の底壁部の固定孔を挿入して位置合わせを行った後に、ビスまたはピンを用いて蓋部１８とケース本体１２を固定する。このようにして電池モジュール１０が完成する。   Next, in the state where the first fixing member is passed through the through hole 43 of the holding member 40 arranged at the end of the laminated body 30 between the lid portion 18 and the bottom wall portion of the case main body 12. After inserting the fixing hole 21 of the lid portion 18, the hollow first fixing member and the fixing hole of the bottom wall portion of the case main body 12 into the jig not to be aligned, the lid portion 18 is The case body 12 is fixed. In this way, the battery module 10 is completed.

（本実施形態の作用および効果）
次に、本実施形態の作用および効果について説明する。
本実施形態において、端部に保持部材４０が取り付けられた単電池３２を積層すると、一方の保持部材４０の係合受け部４２に他方の保持部材４０の係合突部４１が係合した状態で重なり合うので、電池モジュール１０が振動等を受けたとしても保持部材４０のずれが生じ難い。その結果、本実施形態によれば、リード端子３４同士の接続状態も悪化せず、他のリード端子３４との接触等に起因する短絡の発生も防ぐことができるので、接続信頼性を高めるとともに短絡の発生を防止した電池モジュール１０を提供することができる。 (Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.
In this embodiment, when the unit cells 32 having the holding members 40 attached to the end portions are stacked, the engagement protrusions 41 of the other holding member 40 are engaged with the engagement receiving portions 42 of the one holding member 40. Therefore, even if the battery module 10 receives vibration or the like, the holding member 40 is hardly displaced. As a result, according to the present embodiment, the connection state between the lead terminals 34 does not deteriorate, and the occurrence of a short circuit due to contact with other lead terminals 34 can be prevented, so that the connection reliability is improved. The battery module 10 that prevents the occurrence of a short circuit can be provided.

また、本実施形態によれば、係合受け部４２および係合突部４１は、相互に嵌りあう形状であるので、省スペースである。
特に、本実施形態によれば、重なり合う保持部材４０は２か所以上で互いに係合しているから、確実に保持部材４０のずれを防止することができる。 In addition, according to the present embodiment, the engagement receiving portion 42 and the engagement protrusion 41 have a shape that fits into each other, so that space is saved.
In particular, according to this embodiment, the holding member 40 fit heavy Do Ri is because they engage each other at least two, it is possible to prevent the displacement of securely holding member 40.

また、本実施形態においては、単電池３２の状態を検知するとともに単電池３２のリード端子３４Ａに接続される電圧検知端子６６をさらに備え、保持部材４０には、電圧検知端子６６を電圧検知端子６６の一面がリード端子３４Ａの表面と同一線上となる位置で保持する端子保持部４７が設けられている。したがって、本実施形態によれば、保持部材４０の端子保持部４７に電圧検知端子６６を保持状態にしておいて、単電池３２を配置すると、電圧検知端子６６とリード端子３４Ａとが面接触するので、単電池３２と電圧検知端子６６との接続信頼性を高めることができる。   Further, in the present embodiment, the battery further includes a voltage detection terminal 66 that detects the state of the unit cell 32 and is connected to the lead terminal 34A of the unit cell 32, and the holding member 40 includes the voltage detection terminal 66 as the voltage detection terminal. A terminal holding portion 47 is provided that holds one surface of 66 at a position that is collinear with the surface of the lead terminal 34A. Therefore, according to the present embodiment, when the voltage detection terminal 66 is held in the terminal holding portion 47 of the holding member 40 and the unit cell 32 is disposed, the voltage detection terminal 66 and the lead terminal 34A are in surface contact. Therefore, the connection reliability between the cell 32 and the voltage detection terminal 66 can be improved.

さらに、本実施形態においては、単電池３２には外部機器と電気的に接続されるバスバー３８が接続される一方、保持部材４０には、バスバー３８を、バスバー３８の一面がリード端子３４Ａの表面と同一線上となる位置で保持するバスバー保持部４９が設けられている。したがって、本実施形態によれば、バスバー保持部４９にバスバー３８を保持状態にしておいて単電池３２を配置すると、バスバー３８とリード端子３４Ａとが面接触するので、単電池３２とバスバー３８との接続信頼性を高めることができる。   Further, in the present embodiment, a bus bar 38 that is electrically connected to an external device is connected to the unit cell 32, while the holding member 40 is connected to the bus bar 38, and one surface of the bus bar 38 is the surface of the lead terminal 34A. And a bus bar holding portion 49 for holding at a position on the same line. Therefore, according to the present embodiment, when the single battery 32 is disposed with the bus bar 38 held in the bus bar holding portion 49, the bus bar 38 and the lead terminal 34 </ b> A are in surface contact with each other. Connection reliability can be improved.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
（１）上記実施形態では、係合部および被係合部が、相互に嵌りあう形状である保持部材４０を備える例を示したが、参考例として、重ね合わせた保持部材から、係合部および被係合部の一方または双方が突出しているような構成であってもよい。
（２）上記実施形態では重なり合う保持部材４０が２か所で互いに係合している例を示したが、３か所以外で係合していてもよいし、１箇所で係合していてもよい。
（３）上記実施形態では、単電池３２に電圧検知端子６６が接続され、保持部材４０に電線収容溝４８が形成されている例を示したが、これに限定されない。単電池には電圧検知端子とともに、温度検知端子が接続されていてもよい。また保持部材に温度検知端子に接続される電線を収容する電線収容部を別途設けてもよいし保持部材の電線収容部に電圧検知端子に接続される電線と、温度検知端子に接続される電線をともに収容してもよい。
（４）上記実施形態では、電圧検知端子６６の一面とバスバー３８の一面とリード端子３４の表面とが同一線上に配置される例を示したが、参考例として、電圧検知端子の一面がリード端子の表面と同一線上に配置されていれば、バスバーの一面はリード端子の表面と同一線上に配置されていなくてもよい。また、バスバーと電圧検知端子とは、リード端子の２つの表面のうち相違する面と同一線上に配置されていてもよい。
さらに電圧検知端子の一面およびバスバーの一面が、それぞれ、リード端子の表面に食い込むように配置されていてもよい。
（５）上記実施形態では、蓄電素子が電池である例を示したが、蓄電素子は、コンデンサなどであってもよい。
（６）上記実施形態では、ＩＳＧ用の電池モジュール１０に用いる例を示したが、他の用途の電池モジュールに用いてもよい。
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the example in which the engaging portion and the engaged portion are provided with the holding member 40 having a shape that fits each other is shown. And the structure which one or both of the to-be-engaged part protrudes may be sufficient.
(2) In the above embodiment, the example in which the holding members 40 that overlap each other are engaged with each other at two locations is shown. However, the holding members 40 may be engaged at other than three locations, or may be engaged at one location. Also good.
(3) In the above embodiment, the voltage detection terminal 66 is connected to the unit cell 32 and the electric wire receiving groove 48 is formed in the holding member 40. However, the present invention is not limited to this. A temperature detection terminal may be connected to the unit cell together with the voltage detection terminal. In addition, the holding member may be provided with an electric wire housing portion that accommodates the electric wire connected to the temperature detection terminal, the electric wire connected to the voltage detection terminal in the electric wire housing portion of the holding member, and the electric wire connected to the temperature detection terminal. May be accommodated together.
(4) In the above embodiment, an example in which one surface of the voltage detection terminal 66, one surface of the bus bar 38, and the surface of the lead terminal 34 are arranged on the same line is shown. However, as a reference example , one surface of the voltage detection terminal is a lead. As long as it is arranged on the same line as the surface of the terminal, one surface of the bus bar may not be arranged on the same line as the surface of the lead terminal. Further, the bus bar and the voltage detection terminal may be arranged on the same line as the different surfaces of the two surfaces of the lead terminal.
Furthermore, one surface of the voltage detection terminal and one surface of the bus bar may be arranged so as to bite into the surface of the lead terminal.
(5) In the above embodiment, an example in which the power storage element is a battery has been described, but the power storage element may be a capacitor or the like.
(6) Although the example used for the battery module 10 for ISG was shown in the said embodiment, you may use for the battery module of another use.

１０…電池モジュール（蓄電モジュール）
３０…積層体
３１…電池ユニット
３２…単電池（蓄電素子）
３３…ラミネートフィルム
３３Ｂ…単電池の端部
３４（３４Ａ，３４Ｂ）…リード端子
３８…バスバー（接続部材）
３８Ａ…第２バスバー
３８Ｂ…第１バスバー
４０…保持部材
４０Ａ…上から１段目の前方に配置される保持部材
４０Ｂ…上から２段目の前方に配置される保持部材
４０Ｃ…上から３段目の前方に配置される保持部材
４０Ｄ…上から４段目の前方に配置される保持部材
４０Ｅ…上から５段目の前方に配置される保持部材
４０Ｆ…上から６段目の前方に配置される保持部材
４０Ｇ…上から１段目の後方に配置される保持部材
４０Ｈ…上から２段目の後方に配置される保持部材
４０Ｉ…上から３段目の後方に配置される保持部材
４０Ｊ…上から４段目の後方に配置される保持部材
４０Ｋ…上から５段目の後方に配置される保持部材
４０Ｌ…上から６段目の後方に配置される保持部材
４１…係合突部（係合部）
４１Ａ…係止爪
４２…係合受け部（被係合部）
４２Ａ…係止突部
４７…端子保持部
４９…バスバー保持部（接続部材保持部）
４９Ａ…凹み部
４９Ｂ…抜け止め突部
６５…電線
６６…電圧検知端子（検知用端子） 10 ... Battery module (storage module)
30 ... Laminated body 31 ... Battery unit 32 ... Single battery (storage element)
33 ... Laminate film 33B ... End of unit cell 34 (34A, 34B) ... Lead terminal 38 ... Bus bar (connection member)
38A ... second bus bar 38B ... first bus bar 40 ... holding member 40A ... holding member disposed in front of the first step from the top 40B ... holding member disposed in front of the second step from the top 40C ... three steps from the top Holding member 40D arranged in front of the eye 40D ... Holding member arranged in front of the fourth stage from the top 40E ... Holding member arranged in front of the fifth stage from the top 40F ... arranged in front of the sixth stage from the top Holding member 40G ... Holding member 40H arranged behind the first stage from the top 40H ... Holding member arranged behind the second stage from the top 40I ... Holding member 40J arranged behind the third stage from the top ... Holding member 40K arranged behind the fourth stage from the top 40K ... Holding member arranged behind the fifth stage from the top 40L ... Holding member arranged behind the sixth stage from the top 41 ... engaging protrusion (Engagement part)
41A ... Locking claw 42 ... Engagement receiving part (engaged part)
42A ... Locking protrusion 47 ... Terminal holding part 49 ... Bus bar holding part (connection member holding part)
49A ... Depression 49B ... Retaining protrusion 65 ... Electric wire 66 ... Voltage detection terminal (detection terminal)

Claims (2)

端部から外側方向に突出する正極および負極のリード端子を有する複数の蓄電素子を、積層してなる積層体と、
前記蓄電素子の端部に取り付けられて、当該蓄電素子を保持する保持部材と、を備え、
前記保持部材には、前記蓄電素子の状態を検知するとともに前記リード端子に接続される検知用端子を、前記検知用端子の一面が前記リード端子の一方の面と同一面内となる位置または当該リード端子の一方の面に食い込む位置で保持する端子保持部と、前記蓄電素子と外部機器とを電気的に接続する接続部材を、前記接続部材の一面が前記リード端子の前記一方の面と同一面内となる位置または当該リード端子の前記一方の面に食い込む位置で保持する接続部材保持部と、が設けられ、
前記蓄電素子を積層したときに重なり合う前記保持部材のうち、一方の保持部材には他方の保持部材側に突出する係合部が設けられ、前記他方の保持部材には前記係合部に係合される被係合部が設けられており、
前記係合部および前記被係合部は、相互に嵌りあう形状であり、
前記係合部には、係止爪が、前記係合部の突出する方向と交差する方向に突出して形成されており、前記被係合部には前記係止爪を係止する係止突部が形成されている蓄電モジュール。 A laminated body formed by laminating a plurality of power storage elements having positive and negative lead terminals projecting outward from the ends; and
A holding member that is attached to an end of the power storage element and holds the power storage element;
The holding member is configured to detect a state of the power storage element and connect a detection terminal connected to the lead terminal to a position where one surface of the detection terminal is in the same plane as one surface of the lead terminal, or A terminal holding portion that holds the lead terminal at a position that bites into one surface of the lead terminal, and a connection member that electrically connects the power storage element and the external device, and one surface of the connection member is the same as the one surface of the lead terminal A connection member holding portion that holds at a position that is in a plane or a position that bites into the one surface of the lead terminal,
Of the holding members that overlap when the power storage elements are stacked, one holding member is provided with an engaging portion that protrudes toward the other holding member, and the other holding member is engaged with the engaging portion. To be engaged, and
The engaging portion and the engaged portion are shaped to fit each other,
The engaging portion is formed with a locking claw that protrudes in a direction intersecting with the protruding direction of the engaging portion, and a locking protrusion that locks the locking claw on the engaged portion. The electrical storage module in which the part is formed. 重なり合う前記保持部材は２か所以上で互いに係合している請求項１に記載の蓄電モジュール。 The power storage module according to claim 1, wherein the overlapping holding members are engaged with each other at two or more locations.
JP2012234406A 2012-10-24 2012-10-24 Power storage module Expired - Fee Related JP6086200B2 (en)

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JP4706170B2 (en) * 2003-10-14 2011-06-22 株式会社Ｇｓユアサ Assembled battery
JP4932484B2 (en) * 2004-07-20 2012-05-16 日本電気株式会社 Storage member, storage case and battery pack
JP4848702B2 (en) * 2004-10-26 2011-12-28 日産自動車株式会社 Assembled battery
KR100932227B1 (en) * 2005-09-02 2009-12-16 주식회사 엘지화학 Secondary battery and battery module including same
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