JP6876120B2 - Rechargeable battery module - Google Patents

Rechargeable battery module Download PDF

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JP6876120B2
JP6876120B2 JP2019501163A JP2019501163A JP6876120B2 JP 6876120 B2 JP6876120 B2 JP 6876120B2 JP 2019501163 A JP2019501163 A JP 2019501163A JP 2019501163 A JP2019501163 A JP 2019501163A JP 6876120 B2 JP6876120 B2 JP 6876120B2
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secondary battery
battery module
fitting
protruding portion
bus bar
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JPWO2018155093A1 (en
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正至 仲元
正至 仲元
英樹 本間
英樹 本間
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Vehicle Energy Japan Inc
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Vehicle Energy Japan Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • 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

Description

本発明は、二次電池モジュールに関する。 The present invention relates to a secondary battery module.

従来、再充電可能な二次電池の分野では、鉛電池、ニッケル−カドミウム電池、ニッケル−水素電池等の水溶液系電池が主流であった。しかしながら、電気機器の小型化、軽量化が進むにつれ、高エネルギー密度を有するリチウム二次電池が着目され、その研究、開発及び商品化が急速に進められた。 Conventionally, in the field of rechargeable secondary batteries, aqueous solution batteries such as lead batteries, nickel-cadmium batteries, and nickel-hydrogen batteries have been the mainstream. However, as electric devices have become smaller and lighter, attention has been paid to lithium secondary batteries having a high energy density, and their research, development and commercialization have been rapidly promoted.

一方、地球温暖化や枯渇燃料の問題から電気自動車（ＥＶ）や駆動の一部を電気モーターで補助するハイブリッド電気自動車（ＨＥＶ）が各自動車メーカーで開発され、その電源として高容量で高出力な二次電池が求められるようになってきた。このような要求に合致する電源として、高電圧を有する非水溶液系のリチウム二次電池が注目されている。特に角形リチウム二次電池はパック化した際の体積効率が優れているため、ＨＥＶ用あるいはＥＶ用として角形リチウム二次電池の開発への期待が高まっている。 On the other hand, due to the problems of global warming and depleted fuel, electric vehicles (EVs) and hybrid electric vehicles (HEVs) that partially assist the drive with electric motors have been developed by each automobile manufacturer, and have high capacity and high output as their power source. Secondary batteries are being sought after. As a power source that meets such requirements, a non-aqueous lithium secondary battery having a high voltage is drawing attention. In particular, since the square lithium secondary battery is excellent in volumetric efficiency when packed, expectations for the development of a square lithium secondary battery for HEV or EV are increasing.

一方で、電池パック化する際に作業効率も考慮する必要がある。特許文献１には作業効率の向上をするために、電圧検出用端子を接続端子７４ａの穴に挿入して互いに接続する構造が開示されている。このように電圧検出用端子とバスバーとの接続工数を短縮化しようとすると、電圧検出線とバスバーを嵌め合わす構造が最も早くなる。 On the other hand, it is necessary to consider work efficiency when making a battery pack. Patent Document 1 discloses a structure in which voltage detection terminals are inserted into holes of connection terminals 74a and connected to each other in order to improve work efficiency. In order to shorten the man-hours for connecting the voltage detection terminal and the bus bar in this way, the structure for fitting the voltage detection line and the bus bar becomes the fastest.

特開２０１３−１１００４０号公報Japanese Unexamined Patent Publication No. 2013-110040

しかし特許文献１に記載のように電圧検出用端子とバスバーとを単純に嵌め合わせただけでは、電圧検出用端子とバスバーの位置にばらつきがあるため接続部の位置調整が必要となり、調整が不十分の場合、その後の接合工程で信頼性の高い接合が出来ない、といった課題がある。本発明は、当該課題を解決することを目的とする。 However, if the voltage detection terminal and the bus bar are simply fitted as described in Patent Document 1, the positions of the voltage detection terminal and the bus bar vary, so that the position of the connection portion needs to be adjusted, and the adjustment is not possible. If it is sufficient, there is a problem that highly reliable joining cannot be performed in the subsequent joining process. An object of the present invention is to solve the problem.

本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、本発明の電池モジュール（１００）は、複数の電池（１）を並べ、互いにバスバー（７）で接続された電池群と、電池群上に配置され、電圧検出用端子である端子部（９）が配置された基板（８）と、を備え、端子部（９）とバスバー（７）とを互いに嵌め合わせ、バスバー（７）の一部は、基板（８）側に突出した突出部（１７）を有し、端子部（９）は、基板（８）から突出し、突出部（１７）と嵌り合う嵌合部（１６）を有し、突出部（１７）は、先端に向けて幅が狭くなる形状を成す第一ガイド部（１４）を有し、端子部（９）は、中央部に第一ガイド部（１４）を導く貫通孔（１５ｂ）が形成され、嵌合部（１６）となる第二ガイド部（１５ａ）と、を有し、突出部（１７）と嵌合部（１６）とが互いに嵌め合わされたことを特徴とする。
The present application includes a plurality of means for solving the above problems. For example, the battery module (100) of the present invention has a plurality of batteries (1) arranged side by side and connected to each other by a bus bar (7). A battery group and a substrate (8) on which a terminal portion (9) which is a voltage detection terminal is arranged are provided, and the terminal portion (9) and the bus bar (7) are fitted to each other. , A part of the bus bar (7) has a protruding portion (17) protruding toward the substrate (8), and the terminal portion (9) protrudes from the substrate (8) and fits with the protruding portion (17). engagement part (16) possess, projecting portion (17) has a first guide portion in the shape in which the width becomes narrower toward the distal end has a (14), the terminal portions (9), the first in the central portion A through hole (15b) for guiding the guide portion (14) is formed, and the second guide portion (15a) serving as the fitting portion (16) is provided, and the protruding portion (17) and the fitting portion (16) Are characterized in that they are fitted together.

本発明によれば、電圧検出用端子を容易に位置決めしてバスバーと簡単に接続できるようにした二次電池モジュールを提供することができる。またほかの目的として、電圧検出用端子とバスバー部に発生する応力を緩和する接続信頼性の高い二次電池モジュールを提供することができる。 According to the present invention, it is possible to provide a secondary battery module in which a voltage detection terminal is easily positioned so that it can be easily connected to a bus bar. For another purpose, it is possible to provide a secondary battery module having high connection reliability that relieves stress generated in the voltage detection terminal and the bus bar portion.

本発明の二次電池モジュールを示す分解斜視図である。It is an exploded perspective view which shows the secondary battery module of this invention. 実施例１に係るバスバーと電圧検出用端子を示す斜視図である。It is a perspective view which shows the bus bar and the voltage detection terminal which concerns on Example 1. FIG. 実施例１に係るバスバーと電圧検出用端子の接合状態を示す斜視図である。It is a perspective view which shows the connection state of the bus bar and the voltage detection terminal which concerns on Example 1. FIG. 実施例１の変形例に係る電圧検出用端子を示す斜視図である。It is a perspective view which shows the voltage detection terminal which concerns on the modification of Example 1. FIG.

以下、実施例を図面を用いて説明する。 Hereinafter, examples will be described with reference to the drawings.

≪実施例１≫
図１は、実施例１に係る二次電池モジュール１００を示す分解斜視図である。なお、以降で上下左右前後という言葉を使用する場合には、図１の右下に記載の方向と対応する方向を指す。<< Example 1 >>
FIG. 1 is an exploded perspective view showing the secondary battery module 100 according to the first embodiment. When the terms up, down, left, right, front and back are used hereafter, they refer to the directions corresponding to the directions shown in the lower right of FIG.

二次電池モジュール１００は、二次電池１、セルホルダ２ａ、２ｂ、一対のエンドプレート３、一対のサイドプレート４、二次電池１から噴出したガスを遮蔽するガス遮蔽板５、バスバーカバー６、バスバー７、基板８、電圧検出用端子９、上部カバー１０から構成されている。 The secondary battery module 100 includes a secondary battery 1, cell holders 2a and 2b, a pair of end plates 3, a pair of side plates 4, a gas shielding plate 5 for shielding gas ejected from the secondary battery 1, a bus bar cover 6, and a bus bar. It is composed of 7, a substrate 8, a voltage detection terminal 9, and an upper cover 10.

二次電池１はセルホルダ２ｂを介して積層され、その両端に端部のセルホルダ２ａが配置される構造となり、電池群を構成する。そして、端部のセルホルダ２ａの外にはエンドプレート３が配置され、電池群を両端から前後方向に押圧するように構成している。そして電池群の左右方向からは一対のサイドプレート４で押圧される構造となっている。なお、エンドプレート３は端部のセルホルダ２ａとねじで固定される構造となっている。また、端部のセルホルダ２ａには二次電池モジュールの外部端子と接続する端子台２ａ１が設けられている。 The secondary battery 1 is laminated via the cell holder 2b, and the cell holders 2a at the ends are arranged at both ends thereof, forming a battery group. An end plate 3 is arranged outside the cell holder 2a at the end, and is configured to press the battery group from both ends in the front-rear direction. The structure is such that the battery group is pressed by a pair of side plates 4 from the left-right direction. The end plate 3 has a structure of being fixed to the cell holder 2a at the end with a screw. Further, the cell holder 2a at the end is provided with a terminal block 2a1 for connecting to an external terminal of the secondary battery module.

二次電池１の上面にはガス排出弁１ａが設けられており、その上を覆うようにガス遮蔽板５が配置される構造となっている。このガス遮断板５が配置されることによって、二次電池からのガスが直接基板８にかかることなくなり、電池が過充電池になったとしても電池制御が不可能になるのを避けることができる。 A gas discharge valve 1a is provided on the upper surface of the secondary battery 1, and a gas shielding plate 5 is arranged so as to cover the gas discharge valve 1a. By arranging the gas blocking plate 5, the gas from the secondary battery does not directly hit the substrate 8, and even if the battery becomes an overcharged battery, it can be avoided that the battery control becomes impossible. ..

続いてバスバーカバー６について説明する。本実施形態ではバスバーカバー６はガス遮蔽板５の左右に配置される。このバスバーカバー６は二次電池１の外部端子を露出させる穴が開いており、その穴に対応してバスバー７が配置される。なお、本実施形態ではバスバーカバーは左右に分割される構造となっているが、左右のバスバーカバー６が連結されて一つの部材で構成されていてもよい。 Next, the bus bar cover 6 will be described. In the present embodiment, the bus bar cover 6 is arranged on the left and right sides of the gas shielding plate 5. The bus bar cover 6 has a hole for exposing the external terminal of the secondary battery 1, and the bus bar 7 is arranged corresponding to the hole. In the present embodiment, the bus bar cover is divided into left and right, but the left and right bus bar covers 6 may be connected to form one member.

バスバーカバー６上には電圧検出用端子９が設けられた基板８配置されている。そして基板８上には上部カバー１０が配置される。 A substrate 8 provided with a voltage detection terminal 9 is arranged on the bus bar cover 6. The upper cover 10 is arranged on the substrate 8.

続いて本発明の特徴となる電圧検出用端子９とバスバー７との嵌め合い構造について説明する。図２は電圧検出用端子９とバスバー７を互いに嵌め合わせる前の図である。 Subsequently, the fitting structure of the voltage detection terminal 9 and the bus bar 7, which is a feature of the present invention, will be described. FIG. 2 is a view before fitting the voltage detection terminal 9 and the bus bar 7 to each other.

バスバー７には上方向に突出する突出部１７が設けられている。この突出部の先端には、二つの傾斜部１４ａ、１４ｂが設けられており、先端に向かうにつれて徐々に幅が狭くなる第一ガイド部１４を有する構造になっている。また本実施形態ではこの傾斜部１４ａ、１４ｂは上下前後の面と並行になるように設けられている。このように、寸法校差によって前後方向に突出部１７がずれたとしても、第一ガイド部１４によって穴１５ｂに導かれる構造となっている。 The bus bar 7 is provided with a protruding portion 17 projecting upward. Two inclined portions 14a and 14b are provided at the tip of the protruding portion, and the structure has a first guide portion 14 whose width gradually narrows toward the tip. Further, in the present embodiment, the inclined portions 14a and 14b are provided so as to be parallel to the upper, lower, front and rear surfaces. In this way, even if the protruding portion 17 is displaced in the front-rear direction due to the dimensional school difference, the structure is such that the first guide portion 14 guides the protruding portion 17 to the hole 15b.

一方で電圧検出用端子９は先端に嵌合部１６を設けている。この嵌合部１６は、穴１５ｂと突出部の挿入方向（本実施形態では上方向）に向かうにつれて幅が狭くなるように傾斜する傾斜部１５ａ１、１５ａ２によって構成される第二ガイド部１５ａによって形成されている。また、本実施形態ではこの傾斜部１５ａ１、１５ａ２はそれぞれ上下左右の面と並行に設けられている。このように、寸法校差によって左右方向に突出部１７がずれたとしても、第二ガイド部１５ａによって穴１５ｂに導かれる構造となっている。 On the other hand, the voltage detection terminal 9 is provided with a fitting portion 16 at the tip. The fitting portion 16 is formed by a second guide portion 15a composed of inclined portions 15a1 and 15a2 that are inclined so that the width becomes narrower toward the insertion direction (upward in the present embodiment) of the hole 15b and the protruding portion. Has been done. Further, in the present embodiment, the inclined portions 15a1 and 15a2 are provided in parallel with the upper, lower, left and right surfaces, respectively. In this way, even if the protruding portion 17 is displaced in the left-right direction due to the dimensional school difference, the structure is such that the second guide portion 15a guides the protruding portion 17 to the hole 15b.

このように本実施形態では第一ガイド部１４及び第二ガイド部１５ａによって、前後方向及び左右方向に突出部１７がずれたとしても、バスバー７と電圧検出用端子９の位置調整が不要とした上で確実に接続部（突出部１７と嵌合部１６）を確実に接続することが可能となる。 As described above, in the present embodiment, even if the protrusions 17 are displaced in the front-rear direction and the left-right direction by the first guide portion 14 and the second guide portion 15a, it is not necessary to adjust the positions of the bus bar 7 and the voltage detection terminal 9. It is possible to reliably connect the connecting portions (protruding portion 17 and fitting portion 16) above.

さらに本実施形態では電圧検出用端子９に上下方向に変形した変形部１３を有する構造とした。このような構造にすることによって、第一ガイド部１４及び第二ガイド部１５ａによって発生した前後方向または左右方向、もしくは前後方向及び左右方向の位置ずれによって発生した応力を変形部１３で吸収することが可能となり、電圧検出用端子９とバスバー７との間に発生する応力を緩和する構造となっている。そのため、その後の電圧検出用端子９とバスバー７との溶接工程での溶接信頼性が向上する。 Further, in the present embodiment, the voltage detection terminal 9 has a structure having a deformed portion 13 deformed in the vertical direction. With such a structure, the deformed portion 13 absorbs the stress generated by the positional deviation in the front-rear direction or the left-right direction, or the front-rear direction and the left-right direction generated by the first guide portion 14 and the second guide portion 15a. The structure is such that the stress generated between the voltage detection terminal 9 and the bus bar 7 is relieved. Therefore, the welding reliability in the subsequent welding process between the voltage detection terminal 9 and the bus bar 7 is improved.

なお本実施形態では第一ガイド部１４及び第二ガイド部１５ａの二つのガイド部を用いる構造としたが、第一ガイド部１４または第二ガイド部１５ａのどちらか一方だけ設けるようにしてもよい。 In the present embodiment, the structure uses two guide portions, the first guide portion 14 and the second guide portion 15a, but only one of the first guide portion 14 and the second guide portion 15a may be provided. ..

このように本実施形態では前後方向または左右方向、もしくは前後方向及び左右方向の位置決めを簡素化することによって発生する応力を電圧検出用端子９に設けた変形部１３によって吸収するという点が特徴となる。このような構造とすることによって、位置決めを簡単に行いつつも、嵌合部１６と突出部１７との接触をより確実なものにすることができ、溶接信頼性が向上する。 As described above, the present embodiment is characterized in that the stress generated by simplifying the positioning in the front-rear direction or the left-right direction, or the front-back direction and the left-right direction is absorbed by the deformed portion 13 provided in the voltage detection terminal 9. Become. With such a structure, the contact between the fitting portion 16 and the protruding portion 17 can be made more reliable while the positioning can be easily performed, and the welding reliability is improved.

図３は突出部１７と嵌合部１４が互いに嵌め合わされた構造を示す図である。図３に示すように突出部１７の幅は穴１５ｂの幅よりも広くなるように設けられている。このような構造にすることによって、嵌合部１６と突出部１７との接触をより確実なものにすることができ、溶接信頼性が向上する。 FIG. 3 is a diagram showing a structure in which the protruding portion 17 and the fitting portion 14 are fitted to each other. As shown in FIG. 3, the width of the protruding portion 17 is provided so as to be wider than the width of the hole 15b. With such a structure, the contact between the fitting portion 16 and the protruding portion 17 can be made more reliable, and the welding reliability is improved.

また、本実施形態の第一ガイド部１４は前後方向の位置決め、第二ガイド部１５ａは左右方向の位置決めを行っているが、第一ガイド部１４で左右方向の位置決め、第二ガイド部１５ａで前後方向の位置決めを置こうなうような構造としてもよい。要は、第一ガイド部１４と第二ガイド部１５ａとで互いに位置決め方向が異なっていればよい。 Further, although the first guide portion 14 of the present embodiment is positioned in the front-rear direction and the second guide portion 15a is positioned in the left-right direction, the first guide portion 14 is positioned in the left-right direction and the second guide portion 15a is positioned in the left-right direction. The structure may be such that positioning in the front-rear direction is provided. In short, the first guide portion 14 and the second guide portion 15a need only have different positioning directions.

また、本実施形態ではバスバー７側に突出部１７を設け、電圧検出用端子９側に穴１５ｂを有する嵌合部１６を有することとしたが、バスバー７側に穴を有する嵌合部を設け、電圧検出用端子９側に突出部を設ける構造としてもよい。 Further, in the present embodiment, the protruding portion 17 is provided on the bus bar 7 side, and the fitting portion 16 having the hole 15b on the voltage detection terminal 9 side is provided, but the fitting portion having the hole is provided on the bus bar 7 side. , A structure may be provided in which a protrusion is provided on the voltage detection terminal 9 side.

また、本実施形態では変形部１３は突出部１７側に反り返った形状をしているが、逆方向に反る構造としてもよい。要は変形部１３の機能としては、上下方向に変形可能なように構成されていればよいということである。なお、この変形部１３は塑性変形によって構成されていてもよいし、弾性変形によって構成されていてもよい。 Further, in the present embodiment, the deformed portion 13 has a shape that warps toward the protruding portion 17, but a structure that warps in the opposite direction may be used. The point is that the function of the deforming portion 13 is that it may be configured so as to be deformable in the vertical direction. The deformed portion 13 may be formed by plastic deformation or elastic deformation.

また、本実施形態ではこの変形部１３は電圧検出用端子９側に設けられている構造としたが、突出部１７側に設けられていてもよい。ただし、その場合には上述した通り上下方向に変形可能なように変形部を設ける必要がある。 Further, in the present embodiment, the deformed portion 13 has a structure provided on the voltage detection terminal 9 side, but may be provided on the protruding portion 17 side. However, in that case, as described above, it is necessary to provide a deformable portion so that the deformable portion can be deformed in the vertical direction.

また、図３には示していないが、本実施形態では突出部１７と嵌合部１６は互いに溶接で固定されるが、そのほかの固定方法、たとえば加締めによって互いに固定されていてもよい。
最後に図４を用いて、本発明の変形例を示す。本実施形態では基板８に直接電圧検出用端子９を接続していたが、本変形例では基板ではない板状の樹脂部材１１に電圧検出用端子９を固定した上で、その後の配線を電線１２を用いて行う。このような構造とした場合であっても、本実施形態と同様の効果を得ることができる。 以上、本発明について簡単にまとめる。本発明の電池モジュール（１００）は、複数の電池（１）を並べ、互いにバスバー（７）で接続された電池群と、電池群上に配置された基板（８）と、を備え、バスバー（７）の一部は基板（８）側に突出した突出部（１７）を有し、基板（１７）は、基板（８）から突出し突出部（１７）と嵌り合う嵌合部（１６）を有する端子部（９）を備え、突出部（１７）と、端子部（９）は、嵌合部（１６）との嵌め合いを案内するガイド部（１４、１５ａ）を有し、突出部（１７）及び端子部（９）の一方は変形部（１３）を有する。このような構造にすることによって、前後方向または左右方向、もしくは前後方向及び左右方向の位置決めを簡素化することによって発生する応力を電圧検出用端子９に設けた変形部１３によって吸収することができる。したがって、位置決めを簡単に行いつつも、嵌合部１６と突出部１７との接触をより確実なものにすることができ、溶接信頼性が向上することができる。Further, although not shown in FIG. 3, in the present embodiment, the protruding portion 17 and the fitting portion 16 are fixed to each other by welding, but they may be fixed to each other by another fixing method, for example, crimping.
Finally, FIG. 4 shows a modification of the present invention. In the present embodiment, the voltage detection terminal 9 is directly connected to the substrate 8, but in this modification, the voltage detection terminal 9 is fixed to the plate-shaped resin member 11 which is not the substrate, and then the wiring is connected to the electric wire. 12 is used. Even in the case of such a structure, the same effect as that of the present embodiment can be obtained. The present invention will be briefly summarized above. The battery module (100) of the present invention includes a battery group in which a plurality of batteries (1) are arranged and connected to each other by a bus bar (7), and a substrate (8) arranged on the battery group. A part of 7) has a protruding portion (17) protruding toward the substrate (8), and the substrate (17) has a fitting portion (16) protruding from the substrate (8) and fitting with the protruding portion (17). The terminal portion (9) is provided, and the protruding portion (17) and the terminal portion (9) have a guide portion (14, 15a) for guiding the fitting with the fitting portion (16), and the protruding portion (14, 15a) is provided. One of the terminal portion (17) and the terminal portion (9) has a deformed portion (13). With such a structure, the stress generated by simplifying the positioning in the front-rear direction or the left-right direction, or the front-back direction and the left-right direction can be absorbed by the deformed portion 13 provided in the voltage detection terminal 9. .. Therefore, the contact between the fitting portion 16 and the protruding portion 17 can be made more reliable while the positioning can be easily performed, and the welding reliability can be improved.

また、本発明に記載の二次電池モジュール（１００）は、ガイド部（１４、１５ａ）は、複数の電池（１）が並べられた方向に突出部（１７）と嵌合部（１６）との嵌め合いを案内する第一ガイド部（１４）と、複数の電池（１）が並べられた方向に対して直交する方向に突出部（１７）と嵌合部（１６）との嵌め合いを案内する第二ガイド部（１５ａ）と、を有する。このような構造にすることによって、前後左右方向の位置決めを容易にしたうえで、位置決め精度も向上する。 Further, in the secondary battery module (100) described in the present invention, the guide portions (14, 15a) have a protruding portion (17) and a fitting portion (16) in the direction in which the plurality of batteries (1) are arranged. The first guide portion (14) for guiding the fitting of the above, and the protruding portion (17) and the fitting portion (16) are fitted in a direction orthogonal to the direction in which the plurality of batteries (1) are arranged. It has a second guide unit (15a) for guiding. With such a structure, positioning in the front-back and left-right directions is facilitated, and positioning accuracy is also improved.

また、二次電池モジュール（１００）において、第一ガイド部（１４）は、突出部（１７）及び端子部（９）のいずれか一方に一体に形成されており、第二ガイド部（１５ａ）は、突出部（１７）及び端子部（９）のいずれか他方に一体に形成されている。このように第一ガイド部１４と第二ガイド部１５ａはそれぞれ突出部１７に設けられていても、電圧検出用端子９に設けられていてもどちらでもよい。 Further, in the secondary battery module (100), the first guide portion (14) is integrally formed with either the protruding portion (17) or the terminal portion (9), and the second guide portion (15a). Is integrally formed with either the protruding portion (17) or the terminal portion (9). As described above, the first guide portion 14 and the second guide portion 15a may be provided on the protruding portion 17 or the voltage detection terminal 9, respectively.

また、本発明に記載の二次電池モジュール（１００）は、端子部（９）が、突出部（１７）側に反り返った形状を成し、中央部に貫通孔（１５ｂ）が形成されており、突出部（１７）が、先端に向けて幅が狭くなる形状を成している。 Further, in the secondary battery module (100) described in the present invention, the terminal portion (9) has a shape curved toward the protruding portion (17) side, and a through hole (15b) is formed in the central portion. The protruding portion (17) has a shape in which the width narrows toward the tip.

また、本発明に記載の二次電池モジュール（１００）は、嵌合部（１６）と突出部（１７）が溶接接合されている。 Further, in the secondary battery module (100) described in the present invention, the fitting portion (16) and the protruding portion (17) are welded and joined.

また、本発明に記載の二次電池モジュール（１００）は、突出部（１７）が嵌合部（１６）に加締められている。 Further, in the secondary battery module (100) described in the present invention, the protruding portion (17) is crimped to the fitting portion (16).

また、本発明に記載の二次電池モジュール（１００）は、変形部（１３）が塑性変形部である。 Further, in the secondary battery module (100) described in the present invention, the deformed portion (13) is a plastic deformed portion.

また本発明に記載の二次電池モジュール（１００）は、変形部（１３）が弾性変形部である。 Further, in the secondary battery module (100) described in the present invention, the deformed portion (13) is an elastic deformed portion.

以上、本発明の実施形態について詳述したが、本発明は、前記の実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の精神を逸脱しない範囲で、種々の設計変更を行うことができるものである。例えば、前記した実施の形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることが可能であり、また、ある実施形態の構成に他の実施形態の構成を加えることも可能である。さらに、各実施形態の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs are designed without departing from the spirit of the present invention described in the claims. You can make changes. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

１ 二次電池
２ａ セルホルダ
２ｂ セルホルダ
３ エンドプレート
４ サイドプレート
５ ガス遮断板
６ バスバーカバー
７ バスバー
８ 基板
９ 電圧検出用端子
１０ 上部カバー
１１ 樹脂部材
１２ 電線
１３ 変形部
１４ 第一ガイド部
１５ａ 第二ガイド部
１５ｂ 穴
１６ 嵌合部１７ 突出部
１００ 二次電池モジュール1 Rechargeable battery 2a Cell holder 2b Cell holder 3 End plate 4 Side plate 5 Gas cutoff plate 6 Bus bar cover 7 Bus bar 8 Board 9 Voltage detection terminal 10 Top cover 11 Resin member 12 Electric wire 13 Deformation part 14 First guide part 15a Second guide Part 15b Hole 16 Fitting part 17 Protruding part 100 Rechargeable battery module

Claims (7)

複数の電池を並べ、互いにバスバーで接続された電池群と、前記電池群上に配置され、電圧検出用端子である端子部が配置された基板と、を備え、前記端子部と前記バスバーとを互いに嵌め合わせた二次電池モジュールにおいて、
前記バスバーの一部は、前記基板側に突出した突出部を有し、
前記端子部は、前記基板から突出し、前記突出部と嵌り合う嵌合部を有し、
前記突出部は、先端に向けて幅が狭くなる形状を成す第一ガイド部を有し、
前記端子部は、中央部に前記第一ガイド部を導く貫通孔が形成され、前記嵌合部となる第二ガイド部と、を有し、
前記突出部と前記嵌合部とが互いに嵌め合わされたことを特徴とする二次電池モジュール。 A plurality of batteries are arranged and connected to each other by a bus bar, and a substrate arranged on the battery group and having a terminal portion as a voltage detection terminal is provided. The terminal portion and the bus bar are provided. In the secondary battery modules fitted to each other
A part of the bus bar has a protruding portion protruding toward the substrate, and has a protruding portion.
The terminal portion possess protrudes a fitting portion fitted with the protruding portion from the substrate,
The protruding portion has a first guide portion having a shape that narrows toward the tip.
The terminal portion has a second guide portion, which is formed with a through hole for guiding the first guide portion in the central portion and serves as the fitting portion.
A secondary battery module characterized in that the protruding portion and the fitting portion are fitted to each other. 請求項１に記載の二次電池モジュールにおいて、
前記第一ガイド部は、前記複数の電池が並べられた方向に前記突出部と前記嵌合部との嵌め合いを案内し、前記第二ガイド部は、前記複数の電池が並べられた方向に対して直交する方向に前記突出部と前記嵌合部との嵌め合いを案内することを特徴とする二次電池モジュール。 In the secondary battery module according to claim 1,
The first guide portion guides the fitting between the protrusion and the fitting portion in a direction in which the plurality of batteries are arranged, the second guide portion in a direction in which the plurality of batteries are arranged A secondary battery module characterized in that the fitting of the protruding portion and the fitting portion is guided in a direction orthogonal to the protrusion. 請求項１乃至２のいずれかに記載の二次電池モジュールにおいて、
前記嵌合部と前記突出部は溶接接合されていることを特徴とする二次電池モジュール。 In the secondary battery module according to any one of claims 1 and 2.
A secondary battery module characterized in that the fitting portion and the protruding portion are welded and joined. 請求項１乃至２のいずれかに記載の二次電池モジュールにおいて、
前記突出部は前記嵌合部に加締められていることを特徴とする二次電池モジュール。 In the secondary battery module according to any one of claims 1 and 2.
A secondary battery module characterized in that the protruding portion is crimped to the fitting portion. 請求項１に記載の二次電池モジュールにおいて、In the secondary battery module according to claim 1,
前記端子部は前記突出部側に反り返った形状を成す変形部を有することを特徴とする二次電池モジュール。A secondary battery module characterized in that the terminal portion has a deformed portion having a curved shape on the protruding portion side. 請求項５に記載の二次電池モジュールにおいて、
前記変形部は塑性変形部であることを特徴とする二次電池モジュール。 In the secondary battery module according to claim 5.
A secondary battery module characterized in that the deformed portion is a plastic deformed portion. 請求項５に記載の二次電池モジュールにおいて、
前記変形部は弾性変形部であることを特徴とする二次電池モジュール。 In the secondary battery module according to claim 5.
A secondary battery module characterized in that the deformed portion is an elastic deformed portion.
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