JP5832342B2 - Terminal connection structure - Google Patents

Terminal connection structure Download PDF

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JP5832342B2
JP5832342B2 JP2012054104A JP2012054104A JP5832342B2 JP 5832342 B2 JP5832342 B2 JP 5832342B2 JP 2012054104 A JP2012054104 A JP 2012054104A JP 2012054104 A JP2012054104 A JP 2012054104A JP 5832342 B2 JP5832342 B2 JP 5832342B2
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battery
electrode terminal
terminal
positive electrode
negative electrode
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JP2013187175A (en
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友敬 刑部
友敬 刑部
村山　僚悟
僚悟 村山
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Kojima Industries Corp
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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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    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

本発明は、互いに隣り合う位置に配置される２つの角型の電池の一方である第１の電池の正極端子と他方である第２の電池の負極端子とを、電気的に直列に接続する端子接続構造に関する。   In the present invention, the positive electrode terminal of the first battery, which is one of the two prismatic batteries arranged adjacent to each other, and the negative electrode terminal of the second battery, which is the other, are electrically connected in series. The present invention relates to a terminal connection structure.

特開２０１１−１２９３１１号公報は、互いに隣り合う位置に配置される２つの角型の電池の一方である第１の電池の正極端子と他方である第２の電池の負極端子とを、バスバーを用いて電気的に直列に接続する、端子接続構造を開示している。
上記公報に開示される端子接続構造では、バスバーは、第１の電池の正極端子および第２の電池の負極端子とは別部品である。また、バスバーと、第１の電池の正極端子および第２の電池の負極端子とは、押圧ゴムを用いて互いに押し付けあった状態とされており、締結用のナットが廃止されている。 Japanese Patent Application Laid-Open No. 2011-129511 discloses that a positive electrode terminal of a first battery which is one of two rectangular batteries arranged at positions adjacent to each other and a negative electrode terminal of a second battery which is the other are connected to a bus bar. A terminal connection structure that is electrically connected in series is disclosed.
In the terminal connection structure disclosed in the above publication, the bus bar is a separate component from the positive terminal of the first battery and the negative terminal of the second battery. The bus bar, the positive terminal of the first battery, and the negative terminal of the second battery are pressed against each other using a pressing rubber, and the fastening nut is eliminated.

しかし、従来の端子接続構造には、つぎの問題点がある。
バスバーが第１の電池の正極端子および第２の電池の負極端子と別部品であるため、部品点数を削減する点において改善の余地がある。また、バスバーと第１の電池の正極端子および第２の電池の負極端子とを押し付けあった状態にする押圧ゴムを要するため、部品点数を削減する点において改善の余地がある。 However, the conventional terminal connection structure has the following problems.
Since the bus bar is a separate part from the positive terminal of the first battery and the negative terminal of the second battery, there is room for improvement in terms of reducing the number of parts. Further, since a pressing rubber is required to bring the bus bar and the positive terminal of the first battery and the negative terminal of the second battery into a pressed state, there is room for improvement in terms of reducing the number of parts.

特開２０１１−１２９３１１号公報JP2011-129511A

本発明の目的は、従来に比べて部品点数を削減できる端子接続構造を提供することにある。   The objective of this invention is providing the terminal connection structure which can reduce a number of parts compared with the former.

上記目的を達成する本発明はつぎの通りである。
（１） 互いに隣り合う位置に配置される２つの角型の電池の一方である第１の電池の正極端子と、前記２つの角型の電池の他方である第２の電池の負極端子とを、電気的に直列に接続する端子接続構造であって、
前記第１の電池の正極端子は、前記第１の電池の電槽に設けられる正極端子挿通用孔を挿通して該第１の電池の電槽の内部から外部に延びており、
前記第２の電池の負極端子は、前記第２の電池の電槽に設けられる負極端子挿通用孔を挿通して該第２の電池の電槽の内部から外部に延びており、
前記第１の電池の正極端子の、前記第１の電池の電槽の外部に位置する部分である正極端子外部部分と、前記第２の電池の負極端子の、前記第２の電池の電槽の外部に位置する部分である負極端子外部部分とが、互いに直接接合されており、
前記正極端子外部部分と前記負極端子外部部分とは、該正極端子外部部分と負極端子外部部分の両方に固定される樹脂部材にて包まれており、
前記樹脂部材は、前記正極端子と前記正極端子挿通用孔の縁との間の隙間に入り込み該隙間をシールする正極端子側隙間侵入部を備えるとともに、前記負極端子と前記負極端子挿通用孔の縁との間の隙間に入り込み該隙間をシールする負極端子側隙間侵入部を備える、端子接続構造。
The present invention for achieving the above object is as follows.
(1) A positive terminal of a first battery that is one of two prismatic batteries disposed adjacent to each other, and a negative terminal of a second battery that is the other of the two rectangular batteries A terminal connection structure for electrical connection in series,
The positive terminal of the first battery extends from the inside of the battery case of the first battery to the outside through a positive terminal insertion hole provided in the battery case of the first battery,
The negative electrode terminal of the second battery extends from the inside of the battery case of the second battery to the outside through a negative terminal insertion hole provided in the battery case of the second battery,
A positive electrode terminal external portion of the positive electrode terminal of the first battery, which is a portion located outside the battery case of the first battery, and a battery case of the second battery of the negative electrode terminal of the second battery The negative electrode terminal external part, which is a part located outside the, is directly joined to each other ,
The positive terminal external part and the negative terminal external part are wrapped with a resin member fixed to both the positive terminal external part and the negative terminal external part ,
The resin member includes a positive electrode terminal side gap intrusion portion that enters the gap between the positive electrode terminal and the edge of the positive electrode terminal insertion hole and seals the gap, and the negative electrode terminal and the negative electrode terminal insertion hole comprising a negative terminal side gap incursion to seal the gap enters the gap between the edge, pin connection structure.

上記（１）の端子接続構造によれば、つぎの効果を得ることができる。
第１の電池の正極端子の、第１の電池の電槽の外部に位置する部分である正極端子外部部分と、第２の電池の負極端子の、第２の電池の電槽の外部に位置する部分である負極端子外部部分とが、互いに直接接合されているため、正極端子および負極端子とは別体のバスバーを廃止することができる。また、正極端子および負極端子とは別体のバスバーを廃止できるため、バスバーを正極端子と負極端子に押し付けるための押圧ゴムも廃止できる。よって、従来に比べて部品点数を削減できる。 According to the terminal connection structure of (1) above, the following effects can be obtained.
A positive electrode terminal external portion which is a portion of the positive electrode terminal of the first battery which is located outside the battery case of the first battery, and a negative electrode terminal of the second battery which is located outside the battery case of the second battery. Since the negative electrode terminal external part which is a part to perform is directly joined to each other, a bus bar separate from the positive electrode terminal and the negative electrode terminal can be eliminated. Moreover, since the bus bar separate from the positive electrode terminal and the negative electrode terminal can be eliminated, the pressing rubber for pressing the bus bar against the positive electrode terminal and the negative electrode terminal can also be eliminated. Therefore, the number of parts can be reduced as compared with the prior art.

また、つぎの効果を得ることができる。
樹脂部材が、正極端子外部部分と負極端子外部部分の両方に固定されるため、樹脂部材により、互いに直接接合される正極端子外部部分と負極端子外部部分との接合剥がれを抑制できる。
また、正極端子外部部分と負極端子外部部分とが、樹脂部材にて包まれているため、樹脂部材により、正極端子外部部分と負極端子外部部分とを周囲に存在する部品から絶縁することができる。
 Further, the following effects can be obtained.
Since the resin member is fixed to both the positive electrode terminal external portion and the negative electrode terminal external portion, it is possible to suppress peeling of the joint between the positive electrode external portion and the negative electrode external portion that are directly bonded to each other.
Further, since the positive electrode terminal external part and the negative electrode terminal external part are wrapped with the resin member, the positive electrode terminal external part and the negative electrode terminal external part can be insulated from the surrounding parts by the resin member. .

また、つぎの効果を得ることができる。
樹脂部材が、正極端子側隙間進入部を備えるとともに負極端子側隙間進入部を備えるため、樹脂部材により、正極端子と正極端子挿通用孔の縁との間の隙間から水分（水蒸気）が第１の電池の電槽内に入り込むことを抑制できるとともに、負極端子と負極端子挿通用孔の縁との間の隙間から水分（水蒸気）が第２の電池の電槽内に入り込むことを抑制できる。 Further, the following effects can be obtained.
Since the resin member includes the positive electrode terminal side gap entry portion and the negative electrode terminal side gap entry portion, moisture (water vapor) is first generated from the gap between the positive electrode terminal and the edge of the positive electrode terminal insertion hole by the resin member. Can be prevented from entering the battery case of the battery, and moisture (water vapor) can be prevented from entering the battery case of the second battery from the gap between the negative electrode terminal and the edge of the negative electrode terminal insertion hole.

本発明実施例の端子接続構造を有する電池モジュールの斜視図である。It is a perspective view of the battery module which has the terminal connection structure of this invention Example. 本発明実施例の端子接続構造を有する電池モジュールの概略透視平面図である。1 is a schematic perspective plan view of a battery module having a terminal connection structure according to an embodiment of the present invention. 本発明実施例の端子接続構造を有する電池モジュールの、端子接続構造を電槽の本体に挿入していない状態の、斜視図である。なお、電槽の本体内に挿入される極板群および電解液は省略している。It is a perspective view of the state which has not inserted the terminal connection structure in the main body of a battery case of the battery module which has the terminal connection structure of this invention Example. In addition, the electrode group and electrolyte solution which are inserted into the main body of the battery case are omitted. 図２のＡ−Ａ線拡大断面図である。なお、電槽の本体内に挿入される極板群および電解液は省略している。It is an AA line expanded sectional view of FIG. In addition, the electrode group and electrolyte solution which are inserted into the main body of the battery case are omitted.

以下に、本発明実施例の端子接続構造を、図面を参照して、説明する。
本発明実施例の端子接続構造（端子接続装置）１０は、図４に示すように、互いに隣り合う位置に配置される２つの角型の電池の一方である第１の電池２１の正極端子４０ａと、２つの角型の電池の他方である第２の電池２２の負極端子５０ａとを、電気的に直列に接続する端子接続構造である。 Hereinafter, a terminal connection structure according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 4, the terminal connection structure (terminal connection device) 10 according to the embodiment of the present invention has a positive terminal 40 a of the first battery 21 that is one of two rectangular batteries disposed at positions adjacent to each other. And a negative electrode terminal 50a of the second battery 22, which is the other of the two rectangular batteries, is a terminal connection structure that is electrically connected in series.

第１、第２の電池２１，２２は、図１、図２に示すように、積層される複数（図示例では４個の場合を示している）の角型の電池２０、・・・のうちの互いに隣り合う位置に配置される２つの電池である。 As shown in FIG. 1 and FIG. 2, the first and second batteries 21 and 22 are a plurality of (in the illustrated example, four cases are shown) rectangular batteries 20,. It is two batteries arrange | positioned in the mutually adjacent position.

各電池２０は、図３に示すように、電槽（電池ケース）３０と、正極端子４０と、負極端子５０と、を備える。
電槽３０は、金属製材料で構成されており、たとえばアルミニウム製である。電槽３０は、開口部３１を備える本体３２と、開口部３１を塞ぐように本体３２に固定して取付けられる蓋体３３と、を備える。蓋体３３は、本体３２に、溶接されて固定されていてもよく、カシメ等の別の方法で固定されていてもよい。電槽３０内には、正極版と負極板とをセパレータを介して積層してなる極板群（図示略）と電解液（図示略）とが、収納される。隣り合う電槽３０、３０間には、隣り合う電槽３０、３０間を絶縁するとともに隣り合う電槽３０、３０間に冷媒流路を形成するために、樹脂製の枠部材６０が配設されている。枠部材６０は、隣り合う電槽３０、３０にて挟持されていてもよく、隣り合う電槽３０、３０の少なくともいずれか一方に接着固定されていてもよい。
正極端子４０は、アルミニウム製であり、図２に示すように、電槽３０の蓋体３３に設けられる円形の正極端子挿通用孔３４を挿通して電槽３０の内部から外部に延びている。
負極端子５０は、銅製であり、電槽３０の蓋体３３に設けられる円形の負極端子挿通用孔３５を挿通して電槽３０の内部から外部に延びている。 As shown in FIG. 3, each battery 20 includes a battery case (battery case) 30, a positive electrode terminal 40, and a negative electrode terminal 50.
The battery case 30 is made of a metal material, and is made of, for example, aluminum. The battery case 30 includes a main body 32 having an opening 31 and a lid 33 fixed and attached to the main body 32 so as to close the opening 31. The lid 33 may be fixed to the main body 32 by welding, or may be fixed by another method such as caulking. In the battery case 30, an electrode plate group (not shown) formed by laminating a positive electrode plate and a negative electrode plate via a separator and an electrolyte solution (not shown) are accommodated. A resin frame member 60 is disposed between the adjacent battery cases 30 and 30 in order to insulate the adjacent battery cases 30 and 30 and form a refrigerant flow path between the adjacent battery cases 30 and 30. Has been. The frame member 60 may be sandwiched between the adjacent battery cases 30 and 30, and may be bonded and fixed to at least one of the adjacent battery cases 30 and 30.
The positive electrode terminal 40 is made of aluminum, and extends from the inside of the battery case 30 to the outside through the circular positive terminal insertion hole 34 provided in the lid 33 of the battery case 30 as shown in FIG. .
The negative electrode terminal 50 is made of copper, and extends from the inside of the battery case 30 to the outside through a circular negative electrode terminal insertion hole 35 provided in the lid 33 of the battery case 30.

第１の電池２１（２０）の正極端子４０は、図４に示すように、正極側外方延び部４１と、正極側接近方向延び部４２と、を備える。
正極側外方延び部４１は、第１の電池２１の電槽３０の正極端子挿通用孔３４を挿通して第１の電池２１の電槽３０の内部から外部に直線状に延びている。
正極側接近方向延び部４２は、正極側外方延び部４１の延び方向先端部から折れ曲り、正極側外方延び部４１の延び方向と直交（略直交を含む）する方向であって第２の電池２２（２０）に接近する方向に延びている。
正極端子４０が正極側外方延び部４１と正極側接近方向延び部４２とを備えるため、正極端子４０の形状は、「Ｌ」字形状（略「Ｌ」字形状を含む）である。正極端子４０の横断面形状は、円形である。 As shown in FIG. 4, the positive electrode terminal 40 of the first battery 21 (20) includes a positive electrode side outward extending portion 41 and a positive electrode side approaching direction extending portion 42.
The positive electrode side outwardly extending portion 41 extends linearly from the inside of the battery case 30 of the first battery 21 to the outside through the positive terminal insertion hole 34 of the battery case 30 of the first battery 21.
The positive electrode side approaching direction extending portion 42 is a direction that is bent from the front end portion in the extending direction of the positive electrode side outward extending portion 41 and is perpendicular to (including substantially orthogonal to) the extending direction of the positive electrode side outward extending portion 41. It extends in a direction approaching the battery 22 (20).
Since the positive electrode terminal 40 includes a positive electrode side outward extending portion 41 and a positive electrode side approaching direction extending portion 42, the positive electrode terminal 40 has an “L” shape (including a substantially “L” shape). The cross-sectional shape of the positive electrode terminal 40 is a circle.

第２の電池２２（２０）の負極端子５０は、第１の電池２１の正極端子４０と同形状（略同形状を含む）であり、負極側外方延び部５１と、負極側接近方向延び部５２と、を備える。
負極側外方延び部５１は、第２の電池２２の電槽３０の負極端子挿通用孔３５を挿通して第２の電池２２の電槽３０の内部から外部に直線状に延びている。
負極側接近方向延び部５２は、負極側外方延び部５１の延び方向先端部から折れ曲り、負極側外方延び部５１の延び方向と直交（略直交を含む）する方向であって第１の電池２１（２０）に接近する方向に延びている。
負極端子５０が負極側外方延び部５１と負極側接近方向延び部５２とを備えるため、負極端子５０の形状は、「Ｌ」字形状（略「Ｌ」字形状を含む）である。負極端子５０の横断面形状は、円形である。 The negative electrode terminal 50 of the second battery 22 (20) has the same shape (including substantially the same shape) as the positive electrode terminal 40 of the first battery 21, and extends in the negative electrode side outward extending portion 51 and the negative electrode side approaching direction. Unit 52.
The negative electrode side outwardly extending portion 51 extends linearly from the inside of the battery case 30 of the second battery 22 to the outside through the negative terminal insertion hole 35 of the battery case 30 of the second battery 22.
The negative electrode side approaching direction extending portion 52 is a first direction that is bent from the leading end portion in the extending direction of the negative electrode side outward extending portion 51 and is orthogonal (including substantially orthogonal) to the extending direction of the negative electrode side outward extending portion 51. It extends in a direction approaching the battery 21 (20).
Since the negative electrode terminal 50 includes a negative electrode side outward extending portion 51 and a negative electrode side approaching direction extending portion 52, the negative electrode terminal 50 has an “L” shape (including a substantially “L” shape). The cross-sectional shape of the negative electrode terminal 50 is a circle.

第１の電池２１の正極端子４０の、第１の電池２１の電槽３０の外部に位置する部分である正極端子外部部分４０ａと、第２の電池２２の負極端子５０の、第２の電池２２の電槽３０の外部に位置する部分である負極端子外部部分５０ａとは、互いに直接接合されている。
正極端子外部部分４０ａと負極端子外部部分５０ａとは、正極側接近方向延び部４２と負極側接近方向延び部５２の互いに対向し合う先端面４２ａ、５２ａ同士を溶接等することで直接接合されている。 The second battery of the positive electrode terminal external part 40a which is a part located outside the battery case 30 of the first battery 21 and the negative electrode terminal 50 of the second battery 22 of the positive electrode terminal 40 of the first battery 21. The negative electrode terminal external part 50a which is a part located outside the battery case 30 is directly joined to each other.
The positive electrode terminal external portion 40a and the negative electrode terminal external portion 50a are directly joined by welding or the like to the opposite end surfaces 42a, 52a of the positive electrode side approaching direction extending portion 42 and the negative electrode side approaching direction extending portion 52. Yes.

正極端子外部部分４０ａと負極端子外部部分５０ａとは、正極端子外部部分４０ａと負極端子外部部分５０ａの両方に固定される単一の樹脂部材７０にて、全体が包まれている（カバーされている、覆われている）。 The positive electrode external portion 40a and the negative electrode external portion 50a are entirely wrapped (covered) by a single resin member 70 that is fixed to both the positive electrode external portion 40a and the negative electrode external portion 50a. Is covered).

樹脂部材７０は、絶縁材からなる。樹脂部剤７０は、型成形品である。樹脂部材７０は、樹脂部材７０を成形する図示略の成形型に、互いに直接接合された第１の電池２１の正極端子４０および第２の電池２２の負極端子５０と、第１の電池２１の電槽３０の蓋体３３と、第２の電池２２の電槽３０の蓋体３３と、をセットした状態で、溶融樹脂を流し込んで冷却固化させることで、互いに直接接合された第１の電池２１の正極端子４０および第２の電池２２の負極端子５０と、第１の電池２１の電槽３０の蓋体３３と、第２の電池２２の電槽３０の蓋体３３とに、直接成形され（ダイレクト成形され）固定（接着固定）される。 The resin member 70 is made of an insulating material. The resin part 70 is a molded product. The resin member 70 includes a positive electrode terminal 40 of the first battery 21 and a negative electrode terminal 50 of the second battery 22 that are directly joined to a molding die (not shown) that molds the resin member 70, and the first battery 21. In a state where the lid 33 of the battery case 30 and the lid 33 of the battery case 30 of the second battery 22 are set, the first battery joined directly to each other by pouring molten resin and cooling and solidifying it. The positive electrode terminal 40 of 21 and the negative electrode terminal 50 of the second battery 22, the lid body 33 of the battery case 30 of the first battery 21, and the lid body 33 of the battery case 30 of the second battery 22 are directly molded. (Directly molded) and fixed (adhesion fixed).

樹脂部材７０は、第１の電池２１の正極端子４０と正極端子挿通用孔３４の縁との間の隙間に入り込み該隙間をシール（封止）する正極端子側隙間侵入部７１を備えるとともに、第２の電池２２の負極端子５０と負極端子挿通用孔３５の縁との間の隙間に入り込み該隙間をシール（封止）する負極端子側隙間侵入部７２を備える。
正極端子側隙間侵入部７１は、正極端子４０と正極端子挿通用孔３４の縁とを絶縁するために、正極端子４０の全周にわたって設けられている。
負極端子側隙間侵入部７２は、負極端子５０と負極端子挿通用孔３５の縁とを絶縁するために、負極端子５０の全周にわたって設けられている。 The resin member 70 includes a positive electrode terminal side gap intrusion portion 71 that enters the gap between the positive electrode terminal 40 of the first battery 21 and the edge of the positive electrode terminal insertion hole 34 and seals (seals) the gap. A negative electrode terminal side gap intrusion 72 is provided that enters the gap between the negative electrode terminal 50 of the second battery 22 and the edge of the negative electrode terminal insertion hole 35 and seals (seals) the gap.
The positive electrode terminal side gap intrusion portion 71 is provided over the entire circumference of the positive electrode terminal 40 in order to insulate the positive electrode terminal 40 from the edge of the positive electrode terminal insertion hole 34.
The negative terminal-side gap intrusion 72 is provided over the entire circumference of the negative terminal 50 in order to insulate the negative terminal 50 from the edge of the negative terminal insertion hole 35.

樹脂部材７０は、第１の電池２１の電槽３０の蓋体３３の裏側（電槽３０の本体３２側）に回りこむ正極側回り込み部７３と、第２の電池２２の電槽３０の蓋体３３の裏側（電槽３０の本体３２側）に回り込む負極側回り込み部７４と、を備えていることが望ましい。正極側回り込み部７３と負極側回り込み部７４を備えることにより、樹脂部材７０と第１、第２の電池２１，２２の蓋体３３との接着固定の強度を高めることができるからである。   The resin member 70 includes a positive electrode side wrapping portion 73 that wraps around the back side (the main body 32 side of the battery case 30) of the battery case 30 of the first battery 21, and the lid of the battery case 30 of the second battery 22. It is desirable to include a negative electrode side wrapping portion 74 that wraps around the back side of the body 33 (the main body 32 side of the battery case 30). This is because the provision of the positive electrode side wraparound portion 73 and the negative electrode side wraparound portion 74 can increase the strength of adhesion and fixation between the resin member 70 and the lid 33 of the first and second batteries 21 and 22.

つぎに、本発明実施例の作用、効果を説明する。
第１の電池２１の正極端子４０の、第１の電池２１の電槽３０の外部に位置する部分である正極端子外部部分４０ａと、第２の電池２２の負極端子５０の、第２の電池２２の電槽３０の外部に位置する部分である負極端子外部部分５０ａとが、互いに直接接合されているため、正極端子３０および負極端子５０とは別体のバスバーを廃止することができる。また、正極端子４０および負極端子５０とは別体のバスバーを廃止できるため、バスバーを正極端子４０と負極端子５０に押し付けるための押圧ゴムも廃止できる。よって、従来に比べて部品点数を削減できる。 Next, the operation and effect of the embodiment of the present invention will be described.
The second battery of the positive electrode terminal external part 40a which is a part located outside the battery case 30 of the first battery 21 and the negative electrode terminal 50 of the second battery 22 of the positive electrode terminal 40 of the first battery 21. Since the negative electrode terminal external part 50a which is a part located outside the battery case 30 of 22 is directly joined to each other, a bus bar separate from the positive electrode terminal 30 and the negative electrode terminal 50 can be eliminated. Further, since the bus bar separate from the positive electrode terminal 40 and the negative electrode terminal 50 can be eliminated, the pressing rubber for pressing the bus bar against the positive electrode terminal 40 and the negative electrode terminal 50 can also be eliminated. Therefore, the number of parts can be reduced as compared with the prior art.

樹脂部材７０が、正極端子外部部分４０ａと負極端子外部部分５０ａの両方に固定されるため、樹脂部材７０により、互いに直接接合される正極端子外部部分４０ａと負極端子外部部分５０ａとの接合剥がれを抑制できる。 Since the resin member 70 is fixed to both the positive electrode terminal external portion 40a and the negative electrode terminal external portion 50a, the resin member 70 causes the positive electrode terminal external portion 40a and the negative electrode terminal external portion 50a to be directly bonded to each other. Can be suppressed.

正極端子外部部分４０ａと負極端子外部部分５０ａとが、樹脂部材７０にて包まれているため、樹脂部材７０により、正極端子外部部分４０ａと負極端子外部部分５０ａとを周囲に存在する部品から絶縁することができる。 Since the positive electrode terminal external portion 40a and the negative electrode terminal external portion 50a are encased in the resin member 70, the positive electrode terminal external portion 40a and the negative electrode terminal external portion 50a are insulated from surrounding components by the resin member 70. can do.

樹脂部材７０が、正極端子側隙間進入部７１を備えるとともに負極端子側隙間進入部７２を備えるため、樹脂部材７０により、正極端子４０と正極端子挿通用孔３４の縁との間の隙間から水分（水蒸気）が第１の電池２１の電槽３０内に入り込むことを抑制できるとともに、負極端子５０と負極端子挿通用孔３５の縁との間の隙間から水分（水蒸気）が第２の電池２２の電槽３０内に入り込むことを抑制できる。そのため、Ｏリング等の別部材を要する場合に比べて部品点数を削減できる。 Since the resin member 70 includes the positive electrode terminal-side gap entry portion 71 and the negative electrode terminal-side gap entry portion 72, the resin member 70 allows moisture to be removed from the gap between the positive electrode terminal 40 and the edge of the positive electrode terminal insertion hole 34. (Water vapor) can be prevented from entering the battery case 30 of the first battery 21, and moisture (water vapor) can be removed from the gap between the negative electrode terminal 50 and the edge of the negative electrode terminal insertion hole 35. Intrusion into the battery case 30 can be suppressed. Therefore, the number of parts can be reduced as compared with the case where another member such as an O-ring is required.

樹脂部材７０が、正極端子側隙間進入部７１を備えるとともに負極端子側隙間進入部７２を備えるため、正極端子４０と第１の電池２１の電槽３０との絶縁および負極端子５０と第２の電池２１の電槽３０との絶縁を確実に図ることができる。 Since the resin member 70 includes the positive electrode terminal side gap entry portion 71 and the negative electrode terminal side gap entry portion 72, the insulation between the positive electrode terminal 40 and the battery case 30 of the first battery 21 and the negative electrode terminal 50 and the second Insulation with the battery case 30 of the battery 21 can be aimed at reliably.

正極端子４０と負極端子５０が横断面視で円形であり、正極端子挿通用孔３４と負極端子挿通用孔３５が円形孔であるため、正極端子４０と正極端子挿通用孔３４の縁との間の隙間と、負極端子５０と負極端子挿通用孔３５との間の隙間とに、角部が存在してしまうことを防止できる。そのため、正極端子側隙間侵入部７１と負極端子側隙間侵入部７２とで確実に隙間を塞ぐことができる。 Since the positive electrode terminal 40 and the negative electrode terminal 50 are circular in a cross-sectional view, and the positive electrode terminal insertion hole 34 and the negative electrode terminal insertion hole 35 are circular holes, the positive terminal 40 and the edge of the positive terminal insertion hole 34 are It can prevent that a corner | angular part exists in the clearance gap between and the clearance gap between the negative electrode terminal 50 and the negative electrode terminal penetration hole 35. FIG. Therefore, the gap can be reliably closed by the positive electrode terminal side gap entry part 71 and the negative electrode terminal side gap entry part 72.

樹脂部材７０が、互いに直接接合された第１の電池２１の正極端子４０および第２の電池２２の負極端子５０と、第１の電池２１の電槽３０の蓋体３３と、第２の電池２２の電槽３０の蓋体３３とに、直接成形され（ダイレクト成形され）固定（接着固定）されるため、第１の電池２１の正極端子４０および第２の電池２２の負極端子５０と、第１の電池２１の電槽３０の蓋体３３と、第２の電池２２の電槽３０の蓋体３３とを、樹脂部材７０にて一体化（アッセンブリ化）できる。そのため、樹脂部材７０にて一体化しない場合に比べて組付工数を削減できる。 The positive electrode terminal 40 of the first battery 21 and the negative electrode terminal 50 of the second battery 22, the lid member 33 of the battery case 30 of the first battery 21, and the second battery, in which the resin member 70 is directly bonded to each other. 22 is directly molded (directly molded) and fixed (adhesion-fixed) to the lid 33 of the battery case 30 of the battery 22, so that the positive terminal 40 of the first battery 21 and the negative terminal 50 of the second battery 22; The lid 33 of the battery case 30 of the first battery 21 and the lid 33 of the battery case 30 of the second battery 22 can be integrated (assembled) by the resin member 70. Therefore, the number of assembling steps can be reduced as compared with the case where the resin member 70 is not integrated.

樹脂部材７０は、１個の樹脂部材７０で一組の正極端子４０および負極端子５０に対応できるようにされていてもよいが、部品点数および組付工数を削減するために、１個の樹脂部材７０で複数組の正極端子４０および負極端子５０に対応できるようにされていてもよい。   The resin member 70 may be adapted to correspond to a set of the positive electrode terminal 40 and the negative electrode terminal 50 with one resin member 70. However, in order to reduce the number of parts and the number of assembling steps, one resin member 70 is used. The member 70 may correspond to a plurality of sets of the positive electrode terminal 40 and the negative electrode terminal 50.

１０ 積層体モジュール構造
２０ 電池
２１ 第１の電池
２２ 第２の電池
３０ 電槽
３１ 電槽の本体の開口部
３２ 電槽の本体
３３ 電槽の蓋体
３４ 正極端子挿通用孔
３５ 負極端子挿通用孔
４０ 正極端子
４０ａ 正極端子外部部分
４１ 正極側外方延び部
４２ 正極側接近方向延び部
５０ 負極端子
５０ａ 負極端子外部部分
５１ 負極側外方延び部
５２ 負極側接近方向延び部
６０ 枠部材
７０ 樹脂部材
７１ 正極端子側隙間進入部
７２ 負極端子側隙間進入部
７３ 正極側回り込み部
７４ 負極側回り込み部 DESCRIPTION OF SYMBOLS 10 Laminate module structure 20 Battery 21 1st battery 22 2nd battery 30 Battery case 31 Opening part 32 of battery case main body 33 Battery case main body 33 Battery case cover 34 Positive electrode terminal insertion hole 35 For negative electrode terminal insertion Hole 40 Positive electrode terminal 40a Positive electrode terminal outer portion 41 Positive electrode side outward extending portion 42 Positive electrode side approaching direction extending portion 50 Negative electrode terminal 50a Negative electrode terminal outer portion 51 Negative electrode side outward extending portion 52 Negative electrode side approaching extending portion 60 Frame member 70 Resin Member 71 Positive electrode terminal side gap entry portion 72 Negative electrode terminal side gap entry portion 73 Positive electrode side wraparound portion 74 Negative electrode side wraparound portion

Claims (1)

互いに隣り合う位置に配置される２つの角型の電池の一方である第１の電池の正極端子と、前記２つの角型の電池の他方である第２の電池の負極端子とを、電気的に直列に接続する端子接続構造であって、
前記第１の電池の正極端子は、前記第１の電池の電槽に設けられる正極端子挿通用孔を挿通して該第１の電池の電槽の内部から外部に延びており、
前記第２の電池の負極端子は、前記第２の電池の電槽に設けられる負極端子挿通用孔を挿通して該第２の電池の電槽の内部から外部に延びており、
前記第１の電池の正極端子の、前記第１の電池の電槽の外部に位置する部分である正極端子外部部分と、前記第２の電池の負極端子の、前記第２の電池の電槽の外部に位置する部分である負極端子外部部分とが、互いに直接接合されており、
前記正極端子外部部分と前記負極端子外部部分とは、該正極端子外部部分と負極端子外部部分の両方に固定される樹脂部材にて包まれており、
前記樹脂部材は、前記正極端子と前記正極端子挿通用孔の縁との間の隙間に入り込み該隙間をシールする正極端子側隙間侵入部を備えるとともに、前記負極端子と前記負極端子挿通用孔の縁との間の隙間に入り込み該隙間をシールする負極端子側隙間侵入部を備える、端子接続構造。
The positive terminal of the first battery, which is one of the two prismatic batteries arranged adjacent to each other, and the negative terminal of the second battery, which is the other of the two rectangular batteries, are electrically connected A terminal connection structure connected in series,
The positive terminal of the first battery extends from the inside of the battery case of the first battery to the outside through a positive terminal insertion hole provided in the battery case of the first battery,
The negative electrode terminal of the second battery extends from the inside of the battery case of the second battery to the outside through a negative terminal insertion hole provided in the battery case of the second battery,
A positive electrode terminal external portion of the positive electrode terminal of the first battery, which is a portion located outside the battery case of the first battery, and a battery case of the second battery of the negative electrode terminal of the second battery The negative electrode terminal external part, which is a part located outside the, is directly joined to each other ,
The positive terminal external part and the negative terminal external part are wrapped with a resin member fixed to both the positive terminal external part and the negative terminal external part ,
The resin member includes a positive electrode terminal side gap intrusion portion that enters the gap between the positive electrode terminal and the edge of the positive electrode terminal insertion hole and seals the gap, and the negative electrode terminal and the negative electrode terminal insertion hole comprising a negative terminal side gap incursion to seal the gap enters the gap between the edge, pin connection structure.
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