JP2013214497A - Battery pack - Google Patents

Battery pack Download PDF

Info

Publication number
JP2013214497A
JP2013214497A JP2012277958A JP2012277958A JP2013214497A JP 2013214497 A JP2013214497 A JP 2013214497A JP 2012277958 A JP2012277958 A JP 2012277958A JP 2012277958 A JP2012277958 A JP 2012277958A JP 2013214497 A JP2013214497 A JP 2013214497A
Authority
JP
Japan
Prior art keywords
battery
assembled battery
unit cells
support substrate
bus bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2012277958A
Other languages
Japanese (ja)
Inventor
Toshiyuki Motohashi
季之 本橋
Tomoaki Kashimura
友晃 橿村
Michinori Ikezoe
通則 池添
Yasuhiro Yanagihara
康宏 柳原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2012277958A priority Critical patent/JP2013214497A/en
Priority to PCT/JP2013/053394 priority patent/WO2013132978A1/en
Publication of JP2013214497A publication Critical patent/JP2013214497A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack that allows improving reliability.SOLUTION: A battery pack includes a plurality of unit batteries 100; frames 110 each interposed between the unit batteries; and a battery connection member 60 connecting between electrode terminals 104 and 105 of the unit batteries. The battery connection member 60 has a plurality of bus bars 61 having plane portions 611 and 612 to which the electrode terminals 104 and 105 of the unit batteries 100 are joined, and a supporting substrate 64 supporting the bus bars 61. The supporting substrate 64 has slits 643 and 644 in which the electrode terminals 104 and 105 are inserted from one primary surface 642 side of the supporting substrate 64. The plane portions 611 and 612 are located on the other primary surface 641 side. The frame 110 has a recess 113 recessed toward unit battery body side 106 from end sides of the electrode terminals 104 and 105, and ends of the plane portions 611 and 612 and projection ends of the electrode terminals 104 and 105 are located in the recess 113.

Description

本発明は、複数の扁平型の単電池を備えた組電池に関するものである。   The present invention relates to an assembled battery including a plurality of flat unit cells.

複数の単電池を備えた組電池として、略コの字の断面形状を有するバスバを実装した基板を備え、単電池の電極端子を当該基板の開口に挿入し、基板を貫通した電極端子をバスバの平面部にそれぞれ接合したものが知られている（例えば特許文献１参照）。   An assembled battery including a plurality of unit cells includes a board on which a bus bar having a substantially U-shaped cross-sectional shape is mounted. The electrode terminal of the unit cell is inserted into the opening of the board, and the electrode terminal penetrating the board is connected to the bus bar. What is joined to each of the plane portions is known (see, for example, Patent Document 1).

米国特許出願公開第２００９／０３２５０４２号明細書US Patent Application Publication No. 2009/0325042

上記の組電池では、バスバが組電池から突出しているため、外部からバスバや電極端子に衝撃や振動等が加わり易く、組電池の信頼性の低下を招くおそれがあるという問題があった。   In the above assembled battery, since the bus bar protrudes from the assembled battery, there is a problem that impact or vibration is likely to be applied to the bus bar and the electrode terminal from the outside, and the reliability of the assembled battery may be reduced.

本発明が解決しようとする課題は、信頼性向上を図ることが可能な組電池を提供することである。   The problem to be solved by the present invention is to provide an assembled battery capable of improving reliability.

本発明は、支持基板に支持されたバスバーの平面部の先端と単電池の電極の突出先端を、積層方向に隣り合う単電池間に介装されて相互に連結された連結部材の凹部内に位置させることによって上記課題を解決する。   In the present invention, the front end of the flat portion of the bus bar supported by the support substrate and the protruding end of the electrode of the unit cell are interposed between the unit cells adjacent to each other in the stacking direction and are connected to each other in the recess of the connecting member. The above problem is solved by positioning.

本発明によれば、バスバーの平面部の先端と単電池の電極端子の先端が連結部材の凹部内に位置しており、バスバーや電極端子が連結部材によって保護されるので、組電池の信頼性向上を図ることができる。   According to the present invention, the tip of the flat portion of the bus bar and the tip of the electrode terminal of the unit cell are located in the recess of the connecting member, and the bus bar and the electrode terminal are protected by the connecting member. Improvements can be made.

図１は、本発明の実施形態における組電池を示す斜視図である。FIG. 1 is a perspective view showing an assembled battery in an embodiment of the present invention. 図２は、本発明の実施形態における組電池の分解斜視図である。FIG. 2 is an exploded perspective view of the assembled battery in the embodiment of the present invention. 図３（ａ）〜図３（ｃ）は、図１及び図２に示す組電池における単電池の電気的な接続関係を示す左側面図、平面図、右側面図である。FIG. 3A to FIG. 3C are a left side view, a plan view, and a right side view showing the electrical connection relationship of the cells in the assembled battery shown in FIG. 1 and FIG. 図４は、本発明の実施形態における扁平型の単電池を示す斜視図である。FIG. 4 is a perspective view showing a flat cell in the embodiment of the present invention. 図５は、本発明の実施形態においてフレームを介して積層した２つの単電池を示す斜視図である。FIG. 5 is a perspective view showing two unit cells stacked via a frame in the embodiment of the present invention. 図６は、本発明の実施形態における電極端子とフレームの位置関係を示す図であり、図５のVI方向矢視図である。6 is a diagram showing the positional relationship between the electrode terminal and the frame in the embodiment of the present invention, and is a view taken in the direction of the arrow VI in FIG. 図７は、本発明の実施形態における中間部材を示す斜視図である。FIG. 7 is a perspective view showing an intermediate member in the embodiment of the present invention. 図８は、本発明の実施形態における中間部材の分解斜視図である。FIG. 8 is an exploded perspective view of the intermediate member in the embodiment of the present invention. 図９は、本発明の実施形態における第１の電池接続基板を示す斜視図である。FIG. 9 is a perspective view showing a first battery connection board in the embodiment of the present invention. 図１０は、図９のX-X線に沿った断面図である。FIG. 10 is a cross-sectional view taken along line XX in FIG. 図１１は、本発明の実施形態における第２の電池接続基板を示す斜視図である。FIG. 11 is a perspective view showing a second battery connection board in the embodiment of the present invention.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１及び図２は本実施形態における組電池を示す図、図３（ａ）〜図３（ｃ）はその組電池における単電池の電気的な接続関係を示す図、図４は本実施形態における単電池を示す図、図５は本実施形態においてフレームを介して積層した２つの単電池を示す斜視図、図６は本実施形態における電極端子とフレームの位置関係を示す図である。   FIGS. 1 and 2 are diagrams showing the assembled battery in the present embodiment, FIGS. 3A to 3C are diagrams showing the electrical connection relationship of the single cells in the assembled battery, and FIG. 4 is the present embodiment. FIG. 5 is a perspective view showing two single cells stacked via a frame in the present embodiment, and FIG. 6 is a diagram showing the positional relationship between the electrode terminals and the frame in the present embodiment.

本実施形態における組電池１は、図１及び図２に示すように、複数の単電池１００を積層して構成される２つの電池群１０，２０と、当該電池群１０，２０の間に介装された中間部材３０と、電池群１０，２０及び中間部材３０から成る積層体を覆う各種プレート４１，４２，５１，５２と、電池群１０，２０を構成する単電池１００同士を電気的に接続する電池接続基板６０，７０と、を備えている。   As shown in FIGS. 1 and 2, the assembled battery 1 in the present embodiment includes two battery groups 10 and 20 configured by stacking a plurality of unit cells 100, and the battery groups 10 and 20 are interposed between the battery groups 10 and 20. The mounted intermediate member 30, the various plates 41, 42, 51, 52 that cover the laminate composed of the battery groups 10, 20 and the intermediate member 30, and the single cells 100 constituting the battery groups 10, 20 are electrically connected to each other. Battery connection boards 60 and 70 to be connected.

本例の第１の電池群１０は、１６個の単電池１００を備えている。図３に示すように、これら１６個の単電池１００は、電池接続部材６０，７０を介して電気的に２並列×８直列接続されている。   The first battery group 10 of this example includes 16 unit cells 100. As shown in FIG. 3, these 16 unit cells 100 are electrically connected in parallel 2 × 8 in series via battery connection members 60 and 70.

本実施形態における単電池１００は、図４に示すように、発電要素１０１と、発電要素１０１を収容する外装部材１０２と、発電要素１０１に接続されていると共に外装部材１０２から導出する一対の電極端子１０４，１０５を備えた扁平型のリチウムイオン電池である。なお、扁平型の単電池であれば、リチウムイオン電池に代えて、ニッケル水素電池、ニッケルカドミウム電池等を単電池１００として採用してもよい。   As shown in FIG. 4, the unit cell 100 according to the present embodiment includes a power generation element 101, an exterior member 102 that houses the power generation element 101, and a pair of electrodes that are connected to the power generation element 101 and are derived from the exterior member 102. It is a flat type lithium ion battery provided with terminals 104 and 105. Note that a nickel-metal hydride battery, a nickel cadmium battery, or the like may be adopted as the single battery 100 instead of the lithium ion battery as long as it is a flat single battery.

発電要素１０１は、正極活物質を有する正極板と、負極活物質を有する負極板と、をセパレータを介して交互に積層した電極積層体に、電解質を含浸させて構成されている。一方、外装部材１０２は、例えば、アルミニウム等の金属箔の両面を、ポリエチレンやポリプロピレン等の樹脂材でラミネートして構成されるラミネートフィルムである。この外装部材１０２内に発電要素１０１を収容し減圧した後に、当該外装部材１０２の外縁を熱融着することで外装部材１０２が封止されることで、単電池本体１０６が形成されている。   The power generation element 101 is configured by impregnating an electrolyte into an electrode laminate in which a positive electrode plate having a positive electrode active material and a negative electrode plate having a negative electrode active material are alternately laminated via a separator. On the other hand, the exterior member 102 is a laminate film configured by laminating both surfaces of a metal foil such as aluminum with a resin material such as polyethylene or polypropylene. After the power generation element 101 is accommodated in the exterior member 102 and decompressed, the exterior member 102 is sealed by heat-sealing the outer edge of the exterior member 102, so that the unit cell body 106 is formed.

電極端子１０４，１０５は、この外装部材１０２の外縁から（単電池本体１０６の外縁から）外部に導出しているが、正極端子１０４が外装部材１０２の一方の短辺から導出しているのに対し、負極端子１０５が外装部材１０２の他方の短辺から導出している。つまり、一対の電極端子１０４，１０５が、外装部材１０２から相互に相反する方向に導出している。   The electrode terminals 104 and 105 are led out from the outer edge of the exterior member 102 (from the outer edge of the unit cell body 106), but the positive electrode terminal 104 is led out from one short side of the exterior member 102. On the other hand, the negative electrode terminal 105 is led out from the other short side of the exterior member 102. That is, the pair of electrode terminals 104 and 105 are led out from the exterior member 102 in directions opposite to each other.

なお、本実施形態では、単電池１００（或いは後述する電池ユニット１１，２１）における電極端子１０４，１０５の極性（正極／負極）の方向を「端子極性方向」と称する。   In the present embodiment, the direction of the polarity (positive electrode / negative electrode) of the electrode terminals 104 and 105 in the unit cell 100 (or the battery units 11 and 21 described later) is referred to as “terminal polarity direction”.

例えば、２個の単電池１００を積層した際に、双方の単電池１００の正極端子１０４同士が対向すると共に、双方の単電池１００の負極端子１０５同士が対向する場合には、２個の単電池１００の端子極性方向は同一となる。   For example, when two unit cells 100 are stacked, the positive terminals 104 of both unit cells 100 face each other and the negative terminals 105 of both unit cells 100 face each other. The terminal polarity direction of the battery 100 is the same.

一方、２つの単電池１００を積層した際に、一方の単電池１００の正極端子１０４と他方の単電池１００の負極端子１０５とが対向し、一方の単電池１００の負極端子１０５と他方の単電池１００の正極端子１０４とが対向する場合には、２個の単電池１００の端子極性方向は相反している。   On the other hand, when two unit cells 100 are stacked, the positive electrode terminal 104 of one unit cell 100 and the negative electrode terminal 105 of the other unit cell 100 face each other, and the negative electrode terminal 105 of one unit cell 100 and the other unit cell 100 are opposed to each other. When the positive electrode terminal 104 of the battery 100 is opposed, the terminal polarity directions of the two unit cells 100 are opposite to each other.

本実施形態では、端子極性方向が同一となるように２個の単電池１００を積層し、正極端子１０４同士を直接接合すると共に、負極端子１０５同士を直接接合して、２個の単電池１００を電気的に並列接続することで、１つの第１の電池ユニット１１を形成している。   In the present embodiment, the two unit cells 100 are stacked so that the terminal polarity directions are the same, the positive terminals 104 are directly joined together, and the negative terminals 105 are joined directly to each other. Are electrically connected in parallel to form one first battery unit 11.

そして、第１の電池群１０は、こうした第１の電池ユニット１１を８個積層することで形成されている。この第１の電池群１０では、端子極性方向が相反するように、隣接する第１の電池ユニット１１が相互に積層されており、結果的に８個の第１の電池ユニット１１が電気的に直列接続されている。   The first battery group 10 is formed by stacking eight such first battery units 11. In the first battery group 10, adjacent first battery units 11 are stacked on each other so that the terminal polarity directions are opposite to each other, and as a result, eight first battery units 11 are electrically connected. They are connected in series.

なお、第１の電池ユニット１１を構成する単電池１００の数は２個に限定されず、１個或いは３個以上の単電池１００で第１の電池ユニット１１を構成してもよい。同様に、第１の電池群１０を構成する第１の電池ユニット１１の数も８個に限定されず、任意の数の第１の電池ユニット１１で第１の電池群１０を構成することができる。   Note that the number of the single cells 100 constituting the first battery unit 11 is not limited to two, and the first battery unit 11 may be composed of one or three or more single cells 100. Similarly, the number of the first battery units 11 configuring the first battery group 10 is not limited to eight, and the first battery group 10 may be configured by an arbitrary number of the first battery units 11. it can.

図２及び図５に示すように、第１の電池群１０を構成する１６個の単電池１００の間には、当該単電池１００同士を連結するためのフレーム１１０がそれぞれ介装されている。フレーム１１０の中央開口１１１には単電池１００の発電要素１０１が位置し、隣り合う２つのフレーム１１０の間には、単電池１００の外装部材１０１の外縁に沿って設けられた熱溶着部分１０３が挟み込まれている。これにより、各単電池１００は、各フレーム１１０に対して固定されている。   As shown in FIGS. 2 and 5, a frame 110 for connecting the unit cells 100 is interposed between the 16 unit cells 100 constituting the first cell group 10. The power generation element 101 of the unit cell 100 is located in the central opening 111 of the frame 110, and a heat welding portion 103 provided along the outer edge of the exterior member 101 of the unit cell 100 is between two adjacent frames 110. It is sandwiched. Thereby, each single battery 100 is fixed to each frame 110.

なお、各フレーム１１０は、単電池本体１０６の外縁のうち電極端子１０４，１０５の導出方向辺に少なくとも設けられていればよく、本実施形態のように単電池本体１０６の外縁全体に設けられていなくともよい。   Each frame 110 only needs to be provided at least on the side of the outer edge of the unit cell body 106 in the lead-out direction of the electrode terminals 104 and 105, and is provided on the entire outer edge of the unit cell body 106 as in the present embodiment. Not necessary.

また、本実施形態では、フレーム１１０を、中央開口１１１を備えた外形枠状体で構成したが、フレームの形状は特にこれに限定されない。例えば、中央開口１１１に代えて、単電池１００の発電要素１０１が位置する部位に凹部を備えた板状体でフレームを構成してもよい。   Further, in the present embodiment, the frame 110 is configured by the outer frame shape body having the central opening 111, but the shape of the frame is not particularly limited thereto. For example, instead of the central opening 111, the frame may be configured by a plate-like body having a recess at a portion where the power generation element 101 of the unit cell 100 is located.

すなわち、フレーム１１０は、単電池本体１０６の外縁のうち電極端子１０４，１０５の導出方向辺に少なくとも設けられた部材であればよい。本実施形態では、説明を簡略化するために、フレーム１１０は、中央開口１１１を備え、単電池本体１０６の外縁全体に対して設けられた外形枠状の部材として説明する。   That is, the frame 110 may be a member provided at least on the side of the outer edge of the unit cell body 106 in the direction in which the electrode terminals 104 and 105 are led out. In the present embodiment, in order to simplify the description, the frame 110 is described as an outer frame-shaped member that includes the central opening 111 and is provided on the entire outer edge of the unit cell body 106.

フレーム１１０の四隅には貫通孔１１２がそれぞれ形成されている。後述するように、この貫通孔１１２に挿入された連結ボルト４３によって、単電池１００が固定された全てのフレーム１１０と、中間部材３０及びエンドプレート４１，４２とが連結されて、一体的に固定される。これにより、全てのフレーム１１０が連結されて、当該フレーム１１０を介して全ての単電池１００が連結されると共に、積層方向両側から中間部材３０及びエンドプレート４１，４２間に挟持される。なお、本実施形態におけるフレーム１１０が、本発明における連結部材の一例に相当する。   Through holes 112 are formed at four corners of the frame 110, respectively. As will be described later, all the frames 110 to which the unit cells 100 are fixed, the intermediate member 30 and the end plates 41 and 42 are connected by the connecting bolts 43 inserted into the through holes 112, and are fixed together. Is done. As a result, all the frames 110 are connected, and all the cells 100 are connected via the frame 110, and are sandwiched between the intermediate member 30 and the end plates 41, 42 from both sides in the stacking direction. The frame 110 in the present embodiment corresponds to an example of a connecting member in the present invention.

また、図６に示すように、このフレーム１１０の短辺部分（単電池本体１０６の電極端子１０４，１０５の導出方向辺）には、電極端子１０４，１０５の先端から単電池本体１０６に向かう方向に凹んだ凹部１１３が形成されており、フレーム１１０によって連結された単電池１００の電極端子１０４，１０５の先端は、この凹部１１３内に位置している。換言すれば、単電池１００の電極端子１０４，１０５の先端を凹部１１３内に位置させることによって、フレーム１１０の凹部１１３の両端に、凹部１１３の底面から電極端子１０４，１０５の先端側に向かって突出すると共に、電極端子１０４，１０５の先端よりも突出した凸部１１５を形成しており、結果的に、フレーム１１０の四隅に凸部１１５が設けられている。   Further, as shown in FIG. 6, the short side portion of the frame 110 (the lead-out direction side of the electrode terminals 104 and 105 of the unit cell body 106) is the direction from the tip of the electrode terminals 104 and 105 toward the unit cell body 106. A concave portion 113 is formed in the concave portion 113, and the tips of the electrode terminals 104 and 105 of the unit cells 100 connected by the frame 110 are located in the concave portion 113. In other words, by positioning the tips of the electrode terminals 104 and 105 of the unit cell 100 in the recess 113, both ends of the recess 113 of the frame 110 are directed from the bottom surface of the recess 113 toward the tips of the electrode terminals 104 and 105. Convex portions 115 projecting from the tips of the electrode terminals 104 and 105 are formed, and as a result, convex portions 115 are provided at the four corners of the frame 110.

このように、電極端子１０４，１０５の先端を、フレーム１１０の外接矩形１１４（図５のVI方向（フレーム１１０の法線方向）からフレーム１１０を見た場合に、フレーム１１０の輪郭全体を包含する仮想上の最小の矩形）の内側に位置させることで、外部から加わる衝撃等から電極端子１０４，１０５を保護したり、外部からの電極端子１０４，１０５への接触を抑制することができる。   In this way, the ends of the electrode terminals 104 and 105 include the entire outline of the frame 110 when the frame 110 is viewed from the circumscribed rectangle 114 of the frame 110 (the VI direction in FIG. 5 (the normal direction of the frame 110)). By positioning it inside the virtual minimum rectangle), it is possible to protect the electrode terminals 104 and 105 from external impacts and the like, and to suppress contact with the electrode terminals 104 and 105 from the outside.

この際、本実施形態では、単電池１００同士を連結するフレーム１１０を利用しているので、組電池１の部品点数を増加させることなく、電極端子１０４，１０５を保護することができる。また、このフレーム１１０は、組電池１を構成する全ての単電池１００と共に積層されているので、必然的に凹部１１３が単電池１００の積層方向の全域に亘って存在しており、フレーム１１０によって全ての電極端子１０４，０１５を保護することができる。   At this time, in this embodiment, since the frame 110 that connects the cells 100 is used, the electrode terminals 104 and 105 can be protected without increasing the number of parts of the assembled battery 1. In addition, since the frame 110 is laminated together with all the unit cells 100 constituting the assembled battery 1, the recess 113 inevitably exists over the entire region of the unit cell 100 in the stacking direction. All electrode terminals 104 and 015 can be protected.

さらに、図２、図５及び図６に示すように、上記の凹部１１３の両端の凸部１１５には連結ボルト４３が挿通される貫通孔１１２が形成されており、積層された全てのフレーム１１０が貫通孔１１２に挿通された連結ボルト４３よって連結されている。従って、外部からの衝撃が入力された場合には、連結ボルト４３が挿通されて強度の高い上記凸部１１５で衝撃を受けることにより、凹部１１３内の電極端子１０４，０１５を確実に保護することができる。   Further, as shown in FIGS. 2, 5, and 6, through-holes 112 through which the connecting bolts 43 are inserted are formed in the protrusions 115 at both ends of the recess 113, and all the stacked frames 110 are formed. Are connected by a connecting bolt 43 inserted through the through hole 112. Therefore, when an external impact is input, the connection bolt 43 is inserted and the impact is received by the high-strength convex portion 115, so that the electrode terminals 104 and 015 in the concave portion 113 are reliably protected. Can do.

第２の電池群２０も、第１の電池群１０と同様に、上述の単電池１００を１６個備えており、図３に示すように、これら１６個の単電池１００は、後述する電池接続部材６０，７０を介して電気的に２並列×８直列接続されている。   Similarly to the first battery group 10, the second battery group 20 also includes 16 unit cells 100 described above, and as shown in FIG. 3, these 16 unit cells 100 are connected to a battery that will be described later. Electrically connected in parallel 2 × 8 in series via members 60, 70.

本実施形態では、端子極性方向が同一となるように２個の単電池１００を積層し、正極端子１０４同士を直接接合すると共に、負極端子１０５同士を直接接合して、２個の単電池１００を電気的に並列接続することで、１つの第２の電池ユニット２１を形成している。   In the present embodiment, the two unit cells 100 are stacked so that the terminal polarity directions are the same, the positive terminals 104 are directly joined together, and the negative terminals 105 are joined directly to each other. Are electrically connected in parallel to form one second battery unit 21.

そして、第２の電池群２０は、こうした第２の電池ユニット２１を８個積層することで形成されている。この第２の電池群２０では、端子極性方向が相反するように、隣接する第２の電池ユニット２１が相互に積層されており、結果的に８個の第２の電池ユニット２１が電気的に直列接続されている。   The second battery group 20 is formed by stacking eight such second battery units 21. In the second battery group 20, the adjacent second battery units 21 are stacked on each other so that the terminal polarity directions are opposite to each other, and as a result, the eight second battery units 21 are electrically connected. They are connected in series.

なお、第２の電池ユニット２１を構成する単電池１００の数は２個に限定されず、任意の数の単電池１００で第２の電池ユニット２１を構成することができる。また、第２の電池群２０を構成する第２の電池ユニット２１の数も、特に限定されない。   In addition, the number of the single cells 100 configuring the second battery unit 21 is not limited to two, and the second battery unit 21 can be configured by an arbitrary number of single cells 100. Further, the number of the second battery units 21 constituting the second battery group 20 is not particularly limited.

第１の電池群１０と同様に、第２の電池群２０を構成する１６個の単電池１００の間にもフレーム１１０がそれぞれ介装されている。フレーム１１０の貫通孔１１２に挿入された連結ボルト４３によって、全てのフレーム１１０が連結されることにより、全ての単電池１００がフレーム１１０を介して連結されると共に、当該単電池１００が中間部材３０及びエンドプレート４１，４２間に挟持される。   Similarly to the first battery group 10, the frames 110 are respectively interposed between the 16 unit cells 100 constituting the second battery group 20. By connecting all the frames 110 with the connecting bolts 43 inserted into the through holes 112 of the frame 110, all the cells 100 are connected via the frame 110, and the cells 100 are connected to the intermediate member 30. And the end plates 41 and 42.

また、フレーム１１０によって連結された単電池１００の電極１０４，１０５の先端は、フレーム１１０の凹部１１３内に位置しており、これにより、組電池１の部品点数を増加させることなく、電極端子１０４，１０５を衝撃等から保護したり、外部からの電極端子１０４，１０５への接触を抑制することができる。   In addition, the tips of the electrodes 104 and 105 of the unit cells 100 connected by the frame 110 are located in the recess 113 of the frame 110, so that the electrode terminals 104 are not increased without increasing the number of parts of the assembled battery 1. , 105 can be protected from impact or the like, and contact with the electrode terminals 104, 105 from the outside can be suppressed.

以上に説明した第１の電池群１０と第２の電池群２０は、中間部材３０を間に挟んで重ねられており、この中間部材３０を介して２つの電池群１０，２０は電気的に直列接続されている。   The first battery group 10 and the second battery group 20 described above are stacked with the intermediate member 30 interposed therebetween, and the two battery groups 10 and 20 are electrically connected via the intermediate member 30. They are connected in series.

この際、本実施形態では、図３に示すように、第１の電池群１０の中で最内側に位置する単電池１００ａ（図２及び図３参照）の端子極性方向と、第２の電池群２０の中で最内側に位置する単電池１００ｂ（図３参照）の端子極性方向とが同一となるように、第１の電池群１０と第２の電池群２０は重ねられている。なお、本実施形態における「最内側」及び「最外側」とは、第１及び第２の電池群１０，２０を中間部材３０を介して重ね合わせた状態での単電池の位置を意味する。   At this time, in this embodiment, as shown in FIG. 3, the terminal polarity direction of the unit cell 100 a (see FIGS. 2 and 3) located on the innermost side in the first battery group 10, and the second battery The first battery group 10 and the second battery group 20 are overlapped so that the terminal polarity direction of the unit cell 100b (see FIG. 3) located on the innermost side in the group 20 is the same. In the present embodiment, “innermost” and “outermost” mean the position of the unit cell in a state where the first and second battery groups 10 and 20 are overlapped via the intermediate member 30.

中間部材３０は、図７及び図８に示すように、一対の絶縁プレート３１，３２と、中継バスバー３３と、外部端子３４，３５と、スリーブ３６と、を備えている。図７及び図８は本実施形態における中間部材を示す図である。   As shown in FIGS. 7 and 8, the intermediate member 30 includes a pair of insulating plates 31 and 32, a relay bus bar 33, external terminals 34 and 35, and a sleeve 36. 7 and 8 are views showing the intermediate member in the present embodiment.

第１の絶縁プレート３１は、第１の電池群１０の最内側単電池１００ａと接触する接触面３１１を有しており、例えば樹脂材料等の電気絶縁性を有する材料から構成されている。   The first insulating plate 31 has a contact surface 311 that comes into contact with the innermost unit cell 100a of the first battery group 10, and is made of a material having electrical insulation properties such as a resin material.

同様に、第２の絶縁プレート３２も、第２の電池群２０の最内側単電池１００ｂと接触する接触面３２１を有しており、例えば樹脂材料等の電気絶縁性を有する材料から構成されている。この第２の絶縁プレート３２の四隅には貫通孔３２２が形成されている。この貫通孔３２２は、上述のフレーム１１０の貫通孔１１２に対応するように配置されている。   Similarly, the second insulating plate 32 also has a contact surface 321 that comes into contact with the innermost unit cell 100b of the second battery group 20, and is made of an electrically insulating material such as a resin material. Yes. Through holes 322 are formed at the four corners of the second insulating plate 32. The through hole 322 is disposed so as to correspond to the through hole 112 of the frame 110 described above.

なお、図２に示すように、第１のエンドプレート４１は、第１の電池群１０の中で最外側に位置する単電池１００ｃ（図２及び図３参照）に重ねられるプレートであるが、この第１のエンドプレート４１の四隅にも貫通孔４１１が、フレーム１１０の貫通孔１１２に対応するように形成されている。   As shown in FIG. 2, the first end plate 41 is a plate that is stacked on the unit cell 100c (see FIGS. 2 and 3) located on the outermost side in the first battery group 10. Through holes 411 are also formed at the four corners of the first end plate 41 so as to correspond to the through holes 112 of the frame 110.

同様に、第２のエンドプレート４２も、第２の電池群２０の中で最外側に位置する単電池１００ｄ（図２及び図３参照）に重ねられるプレートであるが、この第２のエンドプレート４２の四隅にも貫通孔４２１が、フレーム１１０の貫通孔１１２に対応するように形成されている。   Similarly, the second end plate 42 is a plate overlaid on the outermost unit cell 100d (see FIGS. 2 and 3) in the second battery group 20, and this second end plate Through holes 421 are also formed at the four corners of 42 so as to correspond to the through holes 112 of the frame 110.

従って、２つの電池群１０，２０と、中間部材３０と、２つのエンドプレート４１，４２を重ね合わせた状態で、これらの貫通孔１１２，３１２，４１１，４１２に連結ボルト６３を通すことで、２つの電池群１０，２０と、中間部材３０と、２つのエンドプレート４１，４２が締結固定される。   Therefore, by passing the connecting bolt 63 through these through holes 112, 312, 411, 412 in a state where the two battery groups 10, 20, the intermediate member 30, and the two end plates 41, 42 are overlapped, The two battery groups 10 and 20, the intermediate member 30, and the two end plates 41 and 42 are fastened and fixed.

図７及び図８に戻り、一対の絶縁プレート３１，３２の間には、中継バスバー３３と、一対の外部端子３４，３５と、３本のスリーブ３６と、が介装されている。   Returning to FIGS. 7 and 8, a relay bus bar 33, a pair of external terminals 34 and 35, and three sleeves 36 are interposed between the pair of insulating plates 31 and 32.

中継バスバー３３は、第１の電池群１０の最内側単電池１００ａの正極端子１０４と、第２の電池群２０の最内側単電池１００ｂの負極端子１０５と、を接続する接続部材であり、単電池１０の電極端子１０４，１０５の導出方向に沿って延在している。なお、この中継バスバー３３の延在方向は、電極端子１０４，１０５の導出方向（図中のＸ方向）を一つの成分として含んでいればよく、例えば、電極端子１０４，１０５の導出方向に対して傾斜していてもよい。   The relay bus bar 33 is a connecting member that connects the positive electrode terminal 104 of the innermost cell 100a of the first battery group 10 and the negative electrode terminal 105 of the innermost cell 100b of the second battery group 20. The battery terminal 10 extends along the direction in which the electrode terminals 104 and 105 of the battery 10 are led out. The extending direction of the relay bus bar 33 only needs to include the lead-out direction of the electrode terminals 104 and 105 (X direction in the figure) as one component, for example, with respect to the lead-out direction of the electrode terminals 104 and 105. May be inclined.

この中継バスバー３３は、一方の端部に第１の接続部３３１を有していると共に、他方の端部に第２の接続部３３２を有している。第１の接続部３３１は、中間部材３０の一方の側面３０１から露出しており、第１の電池接続基板６０の第３のバスバー６３が電気的に接続されている。一方、第２の接続部３３２は、中間部材３０の他方の側面３０２から露出しており、第２の電池接続基板７０の第３のバスバー７３が電気的に接続されている。   The relay bus bar 33 has a first connection portion 331 at one end portion and a second connection portion 332 at the other end portion. The first connection portion 331 is exposed from one side surface 301 of the intermediate member 30, and the third bus bar 63 of the first battery connection substrate 60 is electrically connected. On the other hand, the second connection portion 332 is exposed from the other side surface 302 of the intermediate member 30, and the third bus bar 73 of the second battery connection board 70 is electrically connected.

外部端子３４、３５は、組電池１を他の組電池や外部の電気回路と電気的に接続するための出力端子である。   The external terminals 34 and 35 are output terminals for electrically connecting the assembled battery 1 to other assembled batteries or an external electric circuit.

負極外部端子３４は、一方の端部に基板接続部３４１を有していると共に、他方の端部に外部接続部３４２を有しており、絶縁プレート３１，３２の間で９０度屈曲している。基板接続部３４１は、中継バスバー３３の第１の接続部３３１と同様に、中間部材３０の一方の側面３０１から露出しており、第１の電池接続基板６０の第２のバスバー６２が電気的に接続されている。   The negative electrode external terminal 34 has a substrate connecting part 341 at one end and an external connecting part 342 at the other end, and is bent 90 degrees between the insulating plates 31 and 32. Yes. Similarly to the first connection portion 331 of the relay bus bar 33, the substrate connection portion 341 is exposed from one side surface 301 of the intermediate member 30, and the second bus bar 62 of the first battery connection substrate 60 is electrically connected. It is connected to the.

一方、負極外部端子３４の外部接続部３４２は、単電池１００の積層方向に対して実質的に直交し、且つ、中継バスバー３３の延在方向に対して実質的に直交する方向（図中のＺ方向）に向かって、中間部材３０の上面３０３から露出している。   On the other hand, the external connection portion 342 of the negative electrode external terminal 34 is substantially perpendicular to the stacking direction of the unit cells 100 and substantially perpendicular to the extending direction of the relay bus bar 33 (in the drawing). It is exposed from the upper surface 303 of the intermediate member 30 toward the Z direction.

ここで、単電池１００の積層方向に外部接続部３４２に導出させようとすると、負極外部端子３４が絶縁プレート３１，３２から突出させなければならず、組電池全体が大型化することとなる。これに対し、本実施形態では、負極外部端子３４の外部接続部３４２を単電池１００の積層方向に対して実質的に直交する方向に導出させることで、組電池１の小型化が図られている。   Here, if the external connection portion 342 is led out in the stacking direction of the unit cells 100, the negative external terminal 34 must protrude from the insulating plates 31 and 32, and the entire assembled battery becomes large. On the other hand, in the present embodiment, the battery pack 1 is reduced in size by deriving the external connection portion 342 of the negative electrode external terminal 34 in a direction substantially orthogonal to the stacking direction of the unit cells 100. Yes.

また、本実施形態では、中間部材３０の上面３０３に凹部３０４が形成されており、負極外部端子３４の外部接続部３４２の先端は、この凹部３０４内に位置している。このように、外部接続部３４２の先端を、絶縁プレート３１，３２の外接矩形（絶縁プレート３１，３２の法線方向から絶縁プレート３１，３２を見た場合に、絶縁プレート３１，３２の輪郭全体を包含する仮想上の最小の矩形）の内側に位置させることで、外部からの外部接続部３４２への接触を抑制することができる。   In the present embodiment, a recess 304 is formed on the upper surface 303 of the intermediate member 30, and the tip of the external connection portion 342 of the negative electrode external terminal 34 is located in the recess 304. In this way, the outer connection portion 342 has its tip connected to the circumscribed rectangle of the insulating plates 31 and 32 (when the insulating plates 31 and 32 are viewed from the normal direction of the insulating plates 31 and 32, the entire outline of the insulating plates 31 and 32). Is located inside the smallest virtual rectangle that includes the external contact portion 342 from the outside.

正極外部端子３５も同様に、一方の端部に基板接続部３５１を有していると共に、他方の端部に外部接続部３５２を有しており、絶縁プレート３１，３２の間で９０度屈曲している。基板接続部３５１は、中継バスバー３３の第２の接続部３３２と同様に、中間部材３０の他方の側面３０２から露出しており、第２の電池接続基板７０の第２のバスバー７２が電気的に接続されている。   Similarly, the positive electrode external terminal 35 has a substrate connection part 351 at one end and an external connection part 352 at the other end, and is bent 90 degrees between the insulating plates 31 and 32. doing. Similarly to the second connection portion 332 of the relay bus bar 33, the substrate connection portion 351 is exposed from the other side surface 302 of the intermediate member 30, and the second bus bar 72 of the second battery connection substrate 70 is electrically connected. It is connected to the.

一方、正極外部端子３５の外部接続部３５２は、負極外部端子３４の外部接続部３４２と同様に、中間部材３０の上面３０３から露出している。このように、本実施形態では、正極外部端子３５の外部接続部３５２を単電池１００の積層方向に対して実質的に直交する方向に導出させることで、組電池１の小型化が図られている。   On the other hand, the external connection portion 352 of the positive electrode external terminal 35 is exposed from the upper surface 303 of the intermediate member 30 in the same manner as the external connection portion 342 of the negative electrode external terminal 34. Thus, in the present embodiment, the battery pack 1 can be miniaturized by deriving the external connection portion 352 of the positive electrode external terminal 35 in a direction substantially orthogonal to the stacking direction of the unit cells 100. Yes.

また、本実施形態では、負極外部端子３４の外部接続部３４２と正極外部端子３５の外部接続部３５２がいずれも中継バスバー３３の延在方向に対して実質的に直交する方向（図中のＺ方向）に沿って、組電池１の同じ面（図１における上面１ａ）から導出しているので、組電池１の連結作業を効率的に行うことができる。   In the present embodiment, both the external connection part 342 of the negative external terminal 34 and the external connection part 352 of the positive external terminal 35 are substantially orthogonal to the extending direction of the relay bus bar 33 (Z in the figure). (Direction), it leads out from the same surface (upper surface 1a in FIG. 1) of the assembled battery 1, so that the connecting operation of the assembled battery 1 can be performed efficiently.

さらに、本実施形態では、中間部材３０の上面３０３に凹部３０５が形成されており、正極外部端子３５の外部接続部３５２の先端は、この凹部３０５内に位置している。このように、外部接続部３５２の先端を、絶縁プレート３１，３２の外接矩形の内側に位置させることで、外部からの外部接続部３５２への接触を抑制することができる。   Further, in the present embodiment, a recess 305 is formed on the upper surface 303 of the intermediate member 30, and the tip of the external connection portion 352 of the positive electrode external terminal 35 is located in the recess 305. In this manner, by positioning the tip of the external connection portion 352 inside the circumscribed rectangle of the insulating plates 31 and 32, it is possible to suppress contact with the external connection portion 352 from the outside.

３本のスリーブ３６は、第１の絶縁プレート３１と第２の絶縁プレート３２の間に介装されている。それぞれのスリーブ３６は、単電池１００の積層方向に対して実質的に直交し、且つ、中継バスバー３３の延在方向に対して実質的に直交する方向（図中のＺ方向）に沿って配置されている。   The three sleeves 36 are interposed between the first insulating plate 31 and the second insulating plate 32. Each sleeve 36 is arranged along a direction (Z direction in the drawing) that is substantially orthogonal to the stacking direction of the unit cells 100 and substantially orthogonal to the extending direction of the relay bus bar 33. Has been.

図１及び図２に示すように、中間部材３０は、このスリーブ３６に挿入された固定ボルト５３によって、上下に位置する支持プレート５１，５２に締結固定されている。   As shown in FIGS. 1 and 2, the intermediate member 30 is fastened and fixed to the support plates 51 and 52 positioned above and below by fixing bolts 53 inserted into the sleeve 36.

ここで、多数（本例では３２枚）の単電池１００を長い連結ボルト４３によって連結すると、当該連結ボルト４３が撓んでしまい組電池の剛性の低下を招く場合がある。これに対し、本実施形態では、中間部材３０が、単電池１００同士を連結するための貫通孔３２２とは別に、単電池１００以外の部材（本例では支持プレート４１，４２）に中間部材３０を固定するためのスリーブ３６を備えているので、単電池１００の数の増加に伴う組電池１の剛性低下を抑制することができる。   Here, when a large number (32 in this example) of the unit cells 100 are connected by the long connecting bolts 43, the connecting bolts 43 may be bent, leading to a decrease in rigidity of the assembled battery. On the other hand, in this embodiment, the intermediate member 30 is separated from the through-holes 322 for connecting the single cells 100 with each other (other than the single cells 100 (support plates 41 and 42 in this example)). Since the sleeve 36 for fixing the battery is provided, it is possible to suppress a decrease in rigidity of the assembled battery 1 due to an increase in the number of the single cells 100.

なお、図１及び図２に示すように、第１のエンドプレート４１や第２のエンドプレート４２にも、同様のスリーブ４１２，４１３が設けられており、これらのスリーブ４１２，４１３に挿入された固定ボルト５３によって、エンドプレート４１，４２も支持プレート４１，４２に固定されている。本実施形態におけるエンドプレート４１，４２が、本発明における一対のプレート部材の一例に相当する。   As shown in FIGS. 1 and 2, the first end plate 41 and the second end plate 42 are also provided with similar sleeves 412 and 413, and inserted into these sleeves 412 and 413. The end plates 41 and 42 are also fixed to the support plates 41 and 42 by the fixing bolts 53. The end plates 41 and 42 in the present embodiment correspond to an example of a pair of plate members in the present invention.

以上のような中間部材３０を介して積層された第１及び第２の電池群１０，２０には、一方の側方から第１の電池接続基板６０が取り付けられていると共に、他方の側方から第２の電池接続基板７０が取り付けられている。   In the first and second battery groups 10 and 20 stacked via the intermediate member 30 as described above, the first battery connection board 60 is attached from one side and the other side. A second battery connection board 70 is attached.

第１の電池接続基板６０は、図９に示すように、第１のバスバー６１と、第２のバスバー６２と、第３のバスバー６３と、これらのバスバー６１〜６３が実装された支持基板６４と、を有している。図９は本実施形態における第１の電池接続基板を示す図である。なお、本例では、支持基板６４が２つに分割されているが、特にこれに限定されず、一枚の基板で支持基板６４を構成してもよい。   As shown in FIG. 9, the first battery connection board 60 includes a first bus bar 61, a second bus bar 62, a third bus bar 63, and a support board 64 on which these bus bars 61 to 63 are mounted. And have. FIG. 9 is a diagram showing a first battery connection board in the present embodiment. In this example, the support substrate 64 is divided into two parts, but the present invention is not particularly limited to this, and the support substrate 64 may be configured by a single substrate.

第１のバスバー６１は、単電池１００の電極端子１０４，１０５同士を電気的に接続するためのバスバーである。この第１のバスバー６１は、図１０に示すように、電極端子１０４，１０５の延在方向に略沿う２つの平面部６１１，６１２と、それらを繋ぐ連結部６１３と、を備えており、略コの字の断面形状を有している。図１０は図９のX-X線に沿った断面図である。   The first bus bar 61 is a bus bar for electrically connecting the electrode terminals 104 and 105 of the unit cell 100 to each other. As shown in FIG. 10, the first bus bar 61 includes two plane portions 611 and 612 that are substantially along the extending direction of the electrode terminals 104 and 105, and a connecting portion 613 that connects them. It has a U-shaped cross-sectional shape. FIG. 10 is a sectional view taken along line XX in FIG.

この第１のバスバー６１は、連結部６１３で支持基板６４の第１の主面６４１に固定されている。また、第１の平面部６１１は、連結部６１３の一方の端部に立設されており、第２の平面部６１２は、連結部６１３の他方の端部に立設されている。   The first bus bar 61 is fixed to the first main surface 641 of the support substrate 64 by a connecting portion 613. The first plane portion 611 is erected at one end of the connecting portion 613, and the second plane portion 612 is erected at the other end of the connecting portion 613.

本実施形態では、第１のバスバー６１が略コの字の断面形状を有しており、第１及び第２の平面部６１１，６１２が支持基板６４に対して略直交して（電極端子１０４，１０５の延在方向に略沿って）いるので、単電池１００の電極端子１０４，１０５の長さのバラツキをこの平面部６１１，６１２で吸収することができる。   In the present embodiment, the first bus bar 61 has a substantially U-shaped cross-sectional shape, and the first and second flat portions 611 and 612 are substantially orthogonal to the support substrate 64 (electrode terminal 104). Therefore, the flat portions 611 and 612 can absorb variations in the lengths of the electrode terminals 104 and 105 of the unit cell 100.

なお、第１のバスバー６１を支持基板６４に埋設したり、或いは、第１のバスバー６１の連結部６１３を支持基板６４の第２の主面６４２に固定して、平面部６１１，６１２を第１の主面６４１側に貫通させてもよいが、第１のバスバー６１の平面部６１１，６１２のすべてを支持基板６４の第１の主面６４１側に設けることが好ましい。これにより、第１のバスバー６１が単電池１００に接触するのを防止することができる。   The first bus bar 61 is embedded in the support substrate 64, or the connecting portion 613 of the first bus bar 61 is fixed to the second main surface 642 of the support substrate 64, and the plane portions 611 and 612 are However, it is preferable that all of the flat portions 611 and 612 of the first bus bar 61 are provided on the first main surface 641 side of the support substrate 64. Thereby, it can prevent that the 1st bus-bar 61 contacts the cell 100. FIG.

本例では、第１の電池接続基板６０の支持基板６４上に、こうした第１のバスバー６１が７個設けられており、図３（ａ）及び図３（ｃ）に示すように、第１のバスバー６１の平面部６１１，６１２は、単電池１００の２枚分の厚さと実質的に同一の間隔で配置されている。なお、第１のバスバー６１の平面部６１１，６１２の間隔は、単電池１００の２枚分の厚さに限定されず任意の間隔であってもよいが、単電池１００の厚さの整数倍と実質的に同一であることが好ましい。   In this example, seven such first bus bars 61 are provided on the support substrate 64 of the first battery connection substrate 60, and as shown in FIGS. The flat portions 611 and 612 of the bus bar 61 are arranged at substantially the same interval as the thickness of two unit cells 100. The interval between the flat portions 611 and 612 of the first bus bar 61 is not limited to the thickness of the two unit cells 100, but may be any interval, but is an integral multiple of the unit cell 100 thickness. And substantially the same.

そして、第１のバスバー６１のそれぞれの平面部６１１，６１２に隣接するように、スリット６４３が支持基板６４に形成されている。このスリット６４３は、第１の電池ユニット１１（又は第２の電池ユニット２１）が有する２つの単電池１００の２枚の同極端子１０４，１０４（又は１０５，１０５）を挿入することが可能な大きさを有している。   A slit 643 is formed in the support substrate 64 so as to be adjacent to the respective flat portions 611 and 612 of the first bus bar 61. The slit 643 can be inserted with the two homopolar terminals 104, 104 (or 105, 105) of the two unit cells 100 of the first battery unit 11 (or the second battery unit 21). It has a size.

第１の平面部６１１に隣接するスリット６４３には、第１の電池ユニット１１（又は第２の電池ユニット２１）が有する２つの単電池１００の２枚の同極端子１０４，１０４（又は１０５，１０５）が、支持基板６４の第２の主面６４２側から挿入されており、当該同極端子１０４，１０４（又は１０５，１０５）は、第１の平面部６１１に直接接合されている。第１の平面部６１１と単電池１００の電極端子１０４，１０４とを接合する手法としては、例えば、超音波溶接、レーザ溶接、冷間圧接、締結固定等を例示することができる。この第１の平面部６１１は、スリット６４３からの電極端子１０４，１０４の突出部分よりも長くなっている。   In the slit 643 adjacent to the first flat surface portion 611, the two homopolar terminals 104, 104 (or 105, 105) of the two unit cells 100 of the first battery unit 11 (or the second battery unit 21) are provided. 105) is inserted from the second main surface 642 side of the support substrate 64, and the same-polarity terminals 104, 104 (or 105, 105) are directly joined to the first plane portion 611. Examples of the method for joining the first flat portion 611 and the electrode terminals 104 and 104 of the unit cell 100 include ultrasonic welding, laser welding, cold pressure welding, fastening and fixing, and the like. The first flat portion 611 is longer than the protruding portion of the electrode terminals 104 and 104 from the slit 643.

なお、２つの単電池１００の２枚の同極端子１０４，１０４を、スリット６４３に挿入する前に予め接合してもよいし、スリット６４３への挿入後に２枚の同極端子１０４，１０４と第１のバスバー６１の平面部６１１６を一括して接合してもよい。２枚の同極端子１０４，１０４を予め接合する方法としては、上述の超音波溶接、レーザ溶接、冷間圧接、締結固定等を用いることができる。   Note that the two homopolar terminals 104 and 104 of the two unit cells 100 may be joined in advance before being inserted into the slit 643, or after being inserted into the slit 643, The flat portion 6116 of the first bus bar 61 may be joined together. As a method of joining the two same-polarity terminals 104 and 104 in advance, the above-described ultrasonic welding, laser welding, cold pressure welding, fastening and fixing can be used.

一方、第２の平面部６１２に隣接するスリット６４４には、他の第１の電池ユニット１１（又は第２の電池ユニット２１）が有する２つの単電池１００の２枚の同極端子１０５，１０５（又は１０４，１０４）が、支持基板６４の第２の主面６４２側から挿入されており、当該同極端子１０５，１０５（又は１０４，１０４）は、第２の平面部６１２に直接接合されている。この第２の平面部６１２も、スリット６４３からの電極端子１０５，１０５の突出部分よりも長くなっている。   On the other hand, in the slit 644 adjacent to the second flat surface portion 612, the two same-polarity terminals 105, 105 of the two unit cells 100 included in the other first battery unit 11 (or the second battery unit 21). (Or 104, 104) is inserted from the second main surface 642 side of the support substrate 64, and the same-polarity terminals 105, 105 (or 104, 104) are directly joined to the second plane portion 612. ing. The second plane portion 612 is also longer than the protruding portions of the electrode terminals 105 and 105 from the slit 643.

なお、本実施形態では、図１０に示すように、第１のバスバー６１の２つの平面部６１１，６１２は、支持基板６４の法線方向に対して傾斜しており、連結部６１３から遠ざかるに従って２つの平面部６１１，６１２同士が離反してる。第１のバスバー６１がこのような断面形状を有していることで、スリット６４３（６４４）に挿入された電極端子１０４，１０４（１０５，１０５）を平面部６１１（６１２）に密着させ易くなっている。これにより、接合作業の効率化が図られていると共に、接合後の剥離等の抑制も図られている。   In the present embodiment, as shown in FIG. 10, the two flat surface portions 611 and 612 of the first bus bar 61 are inclined with respect to the normal direction of the support substrate 64, and as the distance from the connection portion 613 increases. The two flat portions 611 and 612 are separated from each other. Since the first bus bar 61 has such a cross-sectional shape, the electrode terminals 104 and 104 (105 and 105) inserted into the slits 643 (644) are easily brought into close contact with the flat portion 611 (612). ing. Thereby, efficiency of joining work is achieved and suppression of peeling after joining is also aimed at.

第２のバスバー６２は、図９に示すように、第１の電池群１０の最外側単電池１００ｃの負極端子１０５と、中間部材３０の負極外部端子３４とを電気的に接続するためのバスバーである。この第２のバスバー６２は、単電池１００ｃの負極端子１０５が接合される平面部６２１を有しており、支持基板６４には、この平面部６２１に隣接するようにスリット６４５が形成されている。単電池１００ｃの負極端子１０５は、支持基板６４の第２の主面６４２側からスリット６４３に挿入されており、当該負極端子１０５は平面部６２１に直接接合されている。   As shown in FIG. 9, the second bus bar 62 is a bus bar for electrically connecting the negative electrode terminal 105 of the outermost unit cell 100 c of the first battery group 10 and the negative electrode external terminal 34 of the intermediate member 30. It is. The second bus bar 62 has a flat portion 621 to which the negative electrode terminal 105 of the unit cell 100 c is joined. A slit 645 is formed in the support substrate 64 so as to be adjacent to the flat portion 621. . The negative electrode terminal 105 of the unit cell 100 c is inserted into the slit 643 from the second main surface 642 side of the support substrate 64, and the negative electrode terminal 105 is directly joined to the flat portion 621.

また、この第２のバスバー６２は、単電池１００の積層方向（図中のＹ方向）に沿って平面部６２１の端部から支持基板６４の略中央まで延在する延在部６２２を有している。そして、この延在部６２２の端部には、ボルト固定孔６２４が形成された外部接続部６２３が設けられており、この外部接続部６２３は、ボルトによって中間部材３０の負極外部端子３４の基板接続部３４１に締結固定されている。   Further, the second bus bar 62 has an extending part 622 extending from the end of the flat part 621 to the approximate center of the support substrate 64 along the stacking direction of the single cells 100 (Y direction in the figure). ing. An external connection portion 623 in which a bolt fixing hole 624 is formed is provided at an end portion of the extension portion 622. The external connection portion 623 is a substrate of the negative external terminal 34 of the intermediate member 30 by a bolt. It is fastened and fixed to the connecting portion 341.

第３のバスバー６３は、支持基板６４の略中央に配置されており、第１の電池群１０の最内側単電池１００ａの正極端子１０４と、中継バスバー３３の第１の接続部３３１とを電気的に接続するためのバスバーである。この第３のバスバー６３は、単電池１００ａの正極端子１０４が接合される平面部６３１を有しており、支持基板６４には、この平面部６３１に隣接するようにスリット６４６が形成されている。   The third bus bar 63 is disposed substantially at the center of the support substrate 64, and electrically connects the positive terminal 104 of the innermost cell 100 a of the first battery group 10 and the first connection portion 331 of the relay bus bar 33. It is a bus bar for connection. The third bus bar 63 has a flat portion 631 to which the positive electrode terminal 104 of the unit cell 100a is joined. A slit 646 is formed in the support substrate 64 so as to be adjacent to the flat portion 631. .

また、この第３のバスバー６３は、平面部６３１の端部から単電池１００の積層方向（図中のＹ方向）に沿って突出する中間接続部６３２を有している。この中間接続部６３２にはボルト固定孔６３３が形成されており、この中間接続部６３２は、ボルトによって中継バスバー３３の第１の接続部３３１に締結固定されている。   Further, the third bus bar 63 has an intermediate connection portion 632 that protrudes from the end portion of the flat portion 631 along the stacking direction of the unit cells 100 (Y direction in the drawing). A bolt fixing hole 633 is formed in the intermediate connection portion 632, and the intermediate connection portion 632 is fastened and fixed to the first connection portion 331 of the relay bus bar 33 by a bolt.

さらに、第１の電池接続基板６０は、それぞれのバスバー６１〜６３に接続された電圧検出回路６５を備えている。この電圧検出回路６５は、コネクタ６５１を介してバッテリコントローラ（不図示）に接続されており、個々の単電池１００の電圧や電池群１０，２０全体の電圧を検出することが可能となっている。第１の電池接続基板６０がこうした電圧検出回路６５を備えていることで、組電池１の大型化を抑制することができる。   Further, the first battery connection board 60 includes voltage detection circuits 65 connected to the respective bus bars 61 to 63. The voltage detection circuit 65 is connected to a battery controller (not shown) via a connector 651, and can detect the voltage of each unit cell 100 and the voltage of the entire battery group 10, 20. . Since the first battery connection board 60 includes such a voltage detection circuit 65, the size of the assembled battery 1 can be suppressed.

なお、第１の電池接続基板６０が、電圧検出回路６５に代えて又は電圧検出回路６６に加えて、電流検出用回路、温度検出回路、湿度検出回路等を備えてもよい。   The first battery connection board 60 may include a current detection circuit, a temperature detection circuit, a humidity detection circuit, or the like instead of the voltage detection circuit 65 or in addition to the voltage detection circuit 66.

本実施形態では、図１０に示すように、第１の電池接続基板６０上のバスバー６１〜６３の平面部６１１，６１２，６２１，６３１の先端が、フレーム１１０の凹部１１３内に位置している。すなわち、バスバー６１〜６３の平面部６１１，６１２，６２１，６３１の先端は、単電池１００の電極端子１０４，１０５と同様に、凹部１１３内に位置することによって、フレーム１１０の凹部１１３の両端に形成された凸部１１５よりもフレーム１１０内側方向に位置している。このように、バスバー６１〜６３の平面部６１１，６１２，６２１，６３１の先端を、フレーム１１０の外接矩形１１４の内側（凸部１１５の内側）に位置させることで、外部から加わる衝撃からバスバー６１〜６３を保護したり、外部からのバスバー６１〜６３への接触を抑制することができる。   In the present embodiment, as shown in FIG. 10, the tips of the flat portions 611, 612, 621, 631 of the bus bars 61 to 63 on the first battery connection board 60 are located in the recess 113 of the frame 110. . That is, the tips of the flat portions 611, 612, 621, 631 of the bus bars 61 to 63 are positioned in the recess 113 like the electrode terminals 104, 105 of the unit cell 100, so that both ends of the recess 113 of the frame 110 are located. It is located inward of the frame 110 with respect to the formed convex portion 115. In this way, by positioning the tips of the flat portions 611, 612, 621, 631 of the bus bars 61 to 63 inside the circumscribed rectangle 114 of the frame 110 (inside the convex portion 115), the bus bar 61 can be prevented from an impact applied from the outside. ˜63 can be protected and contact with the bus bars 61 to 63 from the outside can be suppressed.

また、本実施形態では、単電池１００同士を連結するフレーム１１０を利用しているので、組電池１の部品点数を増加させることなく、電極端子１０４，１０５を保護することができる。   In the present embodiment, since the frame 110 that connects the single cells 100 is used, the electrode terminals 104 and 105 can be protected without increasing the number of components of the assembled battery 1.

さらに、このフレーム１１０は、組電池１を構成する全ての単電池１００と共に積層されているので、必然的に凹部１１３が単電池１００の積層方向の全域に亘って存在しており、フレーム１１０によって全ての第１のバスバー６１の平面部６１１，６１２を保護することができる。   Further, since the frame 110 is laminated together with all the unit cells 100 constituting the assembled battery 1, the recess 113 inevitably exists over the entire region of the unit cell 100 in the stacking direction. The flat portions 611 and 612 of all the first bus bars 61 can be protected.

図１１は本実施形態における第２の電池接続基板を示す図である。第２の電池接続基板７０も、同図に示すように、第１〜第３のバスバー７１〜７３と、これらのバスバー７１〜７３が実装された支持基板７４と、電圧検出回路７５と、を有しており、第１の電池接続基板６０と基本的に同様の構造を有しているが、第２及び第３のバスバー７２，７３の接続対象が、上述の第２及び第３のバスバー６２，６３と相違している。   FIG. 11 is a diagram showing a second battery connection board in the present embodiment. As shown in the figure, the second battery connection board 70 includes first to third bus bars 71 to 73, a support board 74 on which the bus bars 71 to 73 are mounted, and a voltage detection circuit 75. The second and third bus bars 72 and 73 are connected to the second and third bus bars described above, but have basically the same structure as the first battery connection board 60. 62 and 63.

この第２の電池接続基板７０の第２のバスバー７２は、第２の電池群２０の最外側単電池１００ｄの正極端子１０４と、中間部材３０の正極外部端子３５と、を電気的に接続している。また、この第２の電池接続基板７０の第３のバスバー７３は、第２の電池群２０の最内側単電池１００ｂの負極端子１０５と、中継バスバー３３の第２の接続部３３２と、を電気的に接続している。   The second bus bar 72 of the second battery connection board 70 electrically connects the positive terminal 104 of the outermost unit cell 100d of the second battery group 20 and the positive external terminal 35 of the intermediate member 30. ing. The third bus bar 73 of the second battery connection board 70 electrically connects the negative terminal 105 of the innermost cell 100b of the second battery group 20 and the second connection portion 332 of the relay bus bar 33. Connected.

特に図示しないが、この第２の電池接続基板７０においても、バスバー７１〜７３の平面部の先端が、フレーム１１０の凹部１１３内（すなわちフレーム１１０の外接矩形１１４の内側）に位置しているので、組電池１の部品点数を増加させることなく、外部から加わる衝撃からバスバー７１〜７３を保護したり、バスバー７１〜７３への接触を抑制することができる。   Although not particularly illustrated, also in the second battery connection board 70, the front ends of the flat portions of the bus bars 71 to 73 are located in the recess 113 of the frame 110 (that is, inside the circumscribed rectangle 114 of the frame 110). Without increasing the number of parts of the assembled battery 1, the bus bars 71 to 73 can be protected from externally applied impacts, or contact with the bus bars 71 to 73 can be suppressed.

以上に説明した組電池１は、以下のように組み立てられる。   The assembled battery 1 described above is assembled as follows.

すなわち、先ず、フレーム１１０を介して単電池１００を積層することで第１の電池群１０と第２の電池群２０を形成し、さらに、中間部材３０を介して電池群１０，２０を重ねる。次いで、第１の電池群１０の上に第１のエンドプレート４１を重ねると共に、第２の電池群２０の上にも第２のエンドプレート４２を重ね、フレーム１１０、中間部材３０、及びエンドプレート４１，４２を連結ボルト４３で連結する。   That is, first, the first battery group 10 and the second battery group 20 are formed by stacking the single cells 100 via the frame 110, and the battery groups 10 and 20 are further stacked via the intermediate member 30. Next, the first end plate 41 is overlaid on the first battery group 10, and the second end plate 42 is also overlaid on the second battery group 20, so that the frame 110, the intermediate member 30, and the end plate are stacked. 41 and 42 are connected by a connecting bolt 43.

次いで、第１の電池接続基板６０のスリット６４３〜６４６に単電池１００の電極端子１０４，１０５を挿入しつつ、第１及び第２の電池群１０，２０に対して、一方の側方から第１の電池接続基板６０を取り付けて、第１の電池接続基板６０をボルト６７（図１及び図３参照）により中間部材３０やエンドプレート４１，４２に締結固定する。   Next, the electrode terminals 104 and 105 of the unit cell 100 are inserted into the slits 643 to 646 of the first battery connection substrate 60, and the first and second battery groups 10 and 20 are inserted from one side. One battery connection board 60 is attached, and the first battery connection board 60 is fastened and fixed to the intermediate member 30 and the end plates 41 and 42 by bolts 67 (see FIGS. 1 and 3).

同様に、第２の電池接続基板７０のスリットに単電池１００の電極端子１０４，１０５を挿入しつつ、第１及び第２の電池群１０，２０に対して、他方の側方から第２の電池接続基板７０を取り付けて、第２の電池接続基板７０をボルト７７（図３参照）により中間部材３０やエンドプレート４１，４２に締結固定する。   Similarly, while inserting the electrode terminals 104 and 105 of the unit cell 100 into the slit of the second battery connection substrate 70, the second and second battery groups 10 and 20 are secondly viewed from the other side. The battery connection board 70 is attached, and the second battery connection board 70 is fastened and fixed to the intermediate member 30 and the end plates 41 and 42 with bolts 77 (see FIG. 3).

このように、電池接続基板６０，７０を中間部材３０やエンドプレート４１，４２に固定することで、単電池１００に対する第１の電池接続基板６０，７０の相対距離を一定に維持することができ、電池接続基板６０，７０による単電池１００の損傷を防止することができる。   Thus, by fixing the battery connection boards 60 and 70 to the intermediate member 30 and the end plates 41 and 42, the relative distance of the first battery connection boards 60 and 70 with respect to the unit cell 100 can be maintained constant. The damage of the unit cell 100 due to the battery connection substrates 60 and 70 can be prevented.

次いで、第１の電池接続基板６０のスリット６４３〜６４６に挿入された電極端子１０４，１０５をバスバー６１〜６３に接合すると共に、第２の電池接続基板７０のスリットに挿入された電極端子１０４，１０５をバスバー７１〜７３に接合する。   Next, the electrode terminals 104 and 105 inserted into the slits 643 to 646 of the first battery connection board 60 are joined to the bus bars 61 to 63, and the electrode terminals 104 and 104 inserted into the slits of the second battery connection board 70 are connected. 105 is joined to the bus bars 71-73.

このように、本実施形態では、２つの単電池１００の電極端子１０４，１０５と、電池接続基板６０，７０のバスバー６１〜６３，７１〜７３と、を一括して接合するので、生産性に優れている。なお、図２に示すように、電池接続基板６０，７０にカバー６６、６７を被せてもよい。   Thus, in this embodiment, since the electrode terminals 104 and 105 of the two unit cells 100 and the bus bars 61 to 63 and 71 to 73 of the battery connection substrates 60 and 70 are joined together, productivity is improved. Are better. As shown in FIG. 2, covers 66 and 67 may be put on the battery connection substrates 60 and 70.

次いで、第１及び第２の電池群１０，２０を第１及び第２の支持プレート５１、５２で挟み、支持プレート５１，５２を中間部材３０やエンドプレート４１，４２と固定ボルト５３で固定すると、組電池１が完成する。   Next, when the first and second battery groups 10 and 20 are sandwiched between the first and second support plates 51 and 52, and the support plates 51 and 52 are fixed to the intermediate member 30 or the end plates 41 and 42 with the fixing bolts 53. The assembled battery 1 is completed.

以上のように、本実施形態では、中継バスバー６１の平面部６１１，６１２を、単電池１００の電極端子１０４，１０５の支持基板６４からの突出部分よりも長くすると共に、当該平面部６１１，６１２の先端を、単電池１００同士を連結するフレーム１１０の凹部１１３内に位置させる。これにより、中継バスバー６１や電極端子１０４，１０５がフレーム１１０によって保護されるので、組電池１の信頼性が向上する。   As described above, in the present embodiment, the flat portions 611 and 612 of the relay bus bar 61 are made longer than the protruding portions of the electrode terminals 104 and 105 of the unit cell 100 from the support substrate 64, and the flat portions 611 and 612. Is positioned in the recess 113 of the frame 110 that connects the single cells 100 to each other. Thereby, since the relay bus bar 61 and the electrode terminals 104 and 105 are protected by the frame 110, the reliability of the assembled battery 1 is improved.

同様に、本実施形態では、中継バスバー７１の平面部７１１，７１２を、単電池１００の電極端子１０４，１５０の支持機番７４からの突出部分よりも長くすると共に、当該平面部７１１，７１２の先端を、単電池１００同士を連結するフレーム１１０の凹部１１３内に位置させる。これにより、中継バスバー７１や電極端子１０４，１０５がフレーム１１０によって保護されるので、組電池１の信頼性が向上する。   Similarly, in the present embodiment, the flat portions 711 and 712 of the relay bus bar 71 are made longer than the protruding portions from the support machine number 74 of the electrode terminals 104 and 150 of the unit cell 100 and the flat portions 711 and 712 The tip is positioned in the recess 113 of the frame 110 that connects the cells 100 to each other. Thereby, since the relay bus bar 71 and the electrode terminals 104 and 105 are protected by the frame 110, the reliability of the assembled battery 1 is improved.

なお、以上に説明した実施形態は、本発明の理解を容易にするために記載されたものであって、本発明を限定するために記載されたものではない。したがって、上記の実施形態に開示された各要素は、本発明の技術的範囲に属する全ての設計変更や均等物をも含む趣旨である。   The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

１…組電池
１０…第１の電池群
２０…第２の電池群
３０…中間部材
４１…第１のエンドプレート
４２…第２のエンドプレート
５１…第１の支持プレート
５２…第２の支持プレート
６０…第１の電池接続基板
６１…第１のバスバー
６１１…第１の平面部
６１２…第２の平面部
６１３…連結部
６２…第２のバスバー
６３…第３のバスバー
６４…支持基板
６４１…第１の主面
６４２…第２の主面
６４３〜６４６…スリット
６５…電圧検出回路
６７…ボルト
７０…第２の電池接続基板
７１…第１のバスバー
７２…第２のバスバー
７３…第３のバスバー
７４…支持基板
７５…電圧検出回路
７７…ボルト
１００…単電池
１０４…正極端子
１０５…負極端子
１０６…単電池本体
１１０…フレーム
１１３…凹部
１１５…凸部 DESCRIPTION OF SYMBOLS 1 ... Battery pack 10 ... 1st battery group 20 ... 2nd battery group 30 ... Intermediate member 41 ... 1st end plate 42 ... 2nd end plate 51 ... 1st support plate 52 ... 2nd support plate DESCRIPTION OF SYMBOLS 60 ... 1st battery connection board 61 ... 1st bus bar 611 ... 1st plane part 612 ... 2nd plane part 613 ... Connection part 62 ... 2nd bus bar 63 ... 3rd bus bar 64 ... Support substrate 641 ... 1st main surface 642 ... 2nd main surface 643-646 ... Slit 65 ... Voltage detection circuit 67 ... Bolt 70 ... 2nd battery connection board 71 ... 1st bus bar 72 ... 2nd bus bar 73 ... 3rd Bus bar 74 ... support substrate 75 ... voltage detection circuit 77 ... volt 100 ... unit cell 104 ... positive electrode terminal 105 ... negative electrode terminal 106 ... unit cell body 110 ... frame 113 ... concave 115 ... convex

Claims (7)

外装部材の内部に発電要素を収容した単電池本体の外縁から電極端子が導出していると共に、相互に積層された複数の扁平型の単電池と、
前記単電池本体の前記電極端子を導出した辺において、積層方向に隣り合う前記単電池間に介装されて前記単電池と共に積層されていると共に、相互に連結された複数の連結部材と、
前記単電池の電極端子同士を電気的に接続する電池接続部材と、を備えており、
前記電池接続部材は、
前記単電池の電極端子が接合される少なくとも一つの平面部を有する複数のバスバーと、
前記バスバーを支持する支持基板と、を有し、
前記支持基板は、前記支持基板の一方の主面側から前記電極端子が挿入されるスリットを有し、
前記平面部は、前記単電池の積層方向に沿って相互に間隔を空けて前記支持基板に配置され、
前記平面部の少なくとも一部は、前記支持基板の他方の主面側に位置しており、
複数の前記連結部材は、前記電極端子の先端側から前記単電池本体側に向かって凹んだ凹部をそれぞれ有し、
前記平面部の先端及び前記電極端子の突出先端は、前記凹部内に位置していることを特徴とする組電池。 The electrode terminals are led out from the outer edge of the unit cell main body containing the power generation element inside the exterior member, and a plurality of flat unit cells stacked on each other,
A plurality of connecting members that are interposed between the unit cells adjacent to each other in the stacking direction and stacked together with the unit cells in the side where the electrode terminals of the unit cell body are led out,
A battery connecting member for electrically connecting the electrode terminals of the unit cells,
The battery connecting member is
A plurality of bus bars having at least one plane portion to which the electrode terminals of the unit cells are joined;
A support substrate for supporting the bus bar,
The support substrate has a slit into which the electrode terminal is inserted from one main surface side of the support substrate,
The planar portion is disposed on the support substrate at intervals from each other along the stacking direction of the unit cells,
At least a part of the planar portion is located on the other main surface side of the support substrate,
The plurality of connecting members each have a recessed portion that is recessed from the tip end side of the electrode terminal toward the unit cell body side,
The assembled battery, wherein the tip of the flat portion and the protruding tip of the electrode terminal are located in the recess. 請求項１に記載の組電池であって、
前記平面部のすべてが、前記支持基板の他方の主面側に位置していることを特徴とする組電池。 The assembled battery according to claim 1,
All of the flat portions are located on the other main surface side of the support substrate. 請求項１又は２に記載の組電池であって、
前記平面部は、前記支持基板の他方の主面の法線方向に対して傾斜していることを特徴とする組電池。 The assembled battery according to claim 1 or 2,
The assembled battery, wherein the flat portion is inclined with respect to a normal direction of the other main surface of the support substrate. 請求項２又は３に記載の組電池であって、
前記バスバーは、
一対の前記平面部と、
前記平面部の端部同士を繋ぐ連結部と、を有することを特徴とする組電池。 The assembled battery according to claim 2 or 3,
The bus bar
A pair of the planar portions;
An assembled battery comprising: a connecting portion that connects end portions of the planar portion. 請求項１〜４のいずれかに記載の組電池であって、
前記支持基板に設けられた電圧検出回路、電流検出回路、温度検出回路、又は、湿度検出回路の少なくとも一つを備えたことを特徴とする組電池。 The assembled battery according to any one of claims 1 to 4,
An assembled battery comprising at least one of a voltage detection circuit, a current detection circuit, a temperature detection circuit, and a humidity detection circuit provided on the support substrate. 請求項１〜５のいずれかに記載の組電池であって、
前記単電池及び前記連結部材から構成される積層体を、前記単電池の積層方向に沿って挟む一対のプレート部材をさらに備えており、
前記電池接続部材は、前記プレート部材に固定されていることを特徴とする組電池。 The assembled battery according to any one of claims 1 to 5,
And further comprising a pair of plate members sandwiching the laminate composed of the unit cells and the connecting member along the stacking direction of the unit cells,
The assembled battery, wherein the battery connecting member is fixed to the plate member. 請求項１〜６のいずれかに記載の組電池であって、
複数の前記連結部材は、前記凹部の両端に前記凹部の底面から前記電極端子の先端側に向かって突出すると共に、前記電極端子の先端よりも突出した凸部をそれぞれ有し、
積層された複数の前記連結部材は、前記凸部を貫通するボルトによって相互に連結されていることを特徴とする組電池。 The assembled battery according to any one of claims 1 to 6,
The plurality of connecting members respectively have protrusions protruding from the bottom surface of the recess toward the tip end side of the electrode terminal at both ends of the recess, and protruding from the tip end of the electrode terminal,
The assembled battery is characterized in that the plurality of stacked connecting members are connected to each other by a bolt that penetrates the convex portion.
JP2012277958A 2012-03-08 2012-12-20 Battery pack Pending JP2013214497A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012277958A JP2013214497A (en) 2012-03-08 2012-12-20 Battery pack
PCT/JP2013/053394 WO2013132978A1 (en) 2012-03-08 2013-02-13 Assembled battery

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012051298 2012-03-08
JP2012051298 2012-03-08
JP2012277958A JP2013214497A (en) 2012-03-08 2012-12-20 Battery pack

Publications (1)

Publication Number Publication Date
JP2013214497A true JP2013214497A (en) 2013-10-17

Family

ID=49116462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012277958A Pending JP2013214497A (en) 2012-03-08 2012-12-20 Battery pack

Country Status (2)

Country Link
JP (1) JP2013214497A (en)
WO (1) WO2013132978A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150137841A (en) * 2014-05-30 2015-12-09 에스케이배터리시스템즈 주식회사 Unit battery modue, Battery module and Battery pack And Method for manufacturing the same
KR20150137840A (en) * 2014-05-30 2015-12-09 에스케이배터리시스템즈 주식회사 Unit battery module and Battery module having the same
KR20160012021A (en) * 2014-07-23 2016-02-02 에스케이이노베이션 주식회사 Battery module comprising a unit battery module and battery pack comprisng the same and Method of manufacturing the battery module
JP2017527956A (en) * 2014-09-09 2017-09-21 エルジー・ケム・リミテッド Battery cell interconnection and voltage sensing assembly and battery module
JP2017534156A (en) * 2014-11-12 2017-11-16 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Container for battery module and battery module having such container
JP2018049823A (en) * 2016-09-14 2018-03-29 旭化成株式会社 Power storage module having vibration-proof connection structure
WO2018216873A1 (en) * 2017-05-25 2018-11-29 주식회사 엘지화학 Battery module, battery pack comprising same and battery module manufacturing method
CN111587496A (en) * 2018-07-03 2020-08-25 株式会社Lg化学 Battery module including heat shrinkable tube
CN112310534A (en) * 2019-12-27 2021-02-02 宁德时代新能源科技股份有限公司 Separator assembly, battery module, battery pack, device, and manufacturing method
US12002995B2 (en) 2018-09-20 2024-06-04 Lg Energy Solution, Ltd. Battery module, battery pack comprising battery module, and vehicle comprising battery pack

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015056341A (en) * 2013-09-13 2015-03-23 株式会社オートネットワーク技術研究所 Power storage module
CN116053712A (en) * 2018-03-28 2023-05-02 松下知识产权经营株式会社 Bus bar
CN111742422B (en) * 2018-03-30 2023-01-06 远景Aesc日本有限公司 Battery module and method for manufacturing battery module

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8035986B2 (en) * 2008-06-30 2011-10-11 Lg Chem, Ltd. Battery cell interconnect and voltage sensing assembly and method for coupling battery cell assemblies thereto
US7563137B1 (en) * 2008-06-30 2009-07-21 Lg Chem, Ltd. Mechanical fastener for coupling to electrical terminals of battery modules and method for coupling to electrical terminals
DE102009049043A1 (en) * 2009-10-12 2011-04-14 Li-Tec Battery Gmbh Cell block with lateral support of the cells
JP5672000B2 (en) * 2009-12-25 2015-02-18 株式会社Ｇｓユアサ Single cell and battery pack using the single cell
JP5544931B2 (en) * 2010-03-02 2014-07-09 株式会社デンソー Laminated cell battery structure
JP5553163B2 (en) * 2010-09-09 2014-07-16 ソニー株式会社 Battery unit
US20130273404A1 (en) * 2010-10-30 2013-10-17 Sanyo Electric., Ltd Battery pack and vehicle including the same
JP5700543B2 (en) * 2011-03-31 2015-04-15 Ｎｅｃエナジーデバイス株式会社 Battery pack

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150137840A (en) * 2014-05-30 2015-12-09 에스케이배터리시스템즈 주식회사 Unit battery module and Battery module having the same
KR20150137841A (en) * 2014-05-30 2015-12-09 에스케이배터리시스템즈 주식회사 Unit battery modue, Battery module and Battery pack And Method for manufacturing the same
KR102214538B1 (en) * 2014-05-30 2021-02-09 에스케이이노베이션 주식회사 Unit battery module and Battery module having the same
KR102211192B1 (en) * 2014-05-30 2021-02-02 에스케이이노베이션 주식회사 Unit battery modue, Battery module and Battery pack And Method for manufacturing the same
KR102210461B1 (en) * 2014-07-23 2021-02-01 에스케이이노베이션 주식회사 Battery module comprising a unit battery module and battery pack comprisng the same and Method of manufacturing the battery module
KR20160012021A (en) * 2014-07-23 2016-02-02 에스케이이노베이션 주식회사 Battery module comprising a unit battery module and battery pack comprisng the same and Method of manufacturing the battery module
JP2017527956A (en) * 2014-09-09 2017-09-21 エルジー・ケム・リミテッド Battery cell interconnection and voltage sensing assembly and battery module
JP2017534156A (en) * 2014-11-12 2017-11-16 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Container for battery module and battery module having such container
US10461382B2 (en) 2014-11-12 2019-10-29 Robert Bosch Gmbh Receptacle for a battery module and battery module having such a receptacle
JP2018049823A (en) * 2016-09-14 2018-03-29 旭化成株式会社 Power storage module having vibration-proof connection structure
WO2018216873A1 (en) * 2017-05-25 2018-11-29 주식회사 엘지화학 Battery module, battery pack comprising same and battery module manufacturing method
US11362402B2 (en) 2017-05-25 2022-06-14 Lg Energy Solution, Ltd. Battery module, battery pack including the same, and method for producing battery module
US11923564B2 (en) 2017-05-25 2024-03-05 Lg Energy Solution, Ltd. Method for producing battery module
CN111587496A (en) * 2018-07-03 2020-08-25 株式会社Lg化学 Battery module including heat shrinkable tube
JP2021510001A (en) * 2018-07-03 2021-04-08 エルジー・ケム・リミテッド Battery module with heat shrinkable tube
JP7047208B2 (en) 2018-07-03 2022-04-05 エルジー エナジー ソリューション リミテッド Battery module with heat shrinkable tube
US12002995B2 (en) 2018-09-20 2024-06-04 Lg Energy Solution, Ltd. Battery module, battery pack comprising battery module, and vehicle comprising battery pack
CN112310534A (en) * 2019-12-27 2021-02-02 宁德时代新能源科技股份有限公司 Separator assembly, battery module, battery pack, device, and manufacturing method
US11605865B2 (en) 2019-12-27 2023-03-14 Contemporary Amperex Technology Co., Limited Separator assembly, battery module, battery pack, apparatus and manufacturing method

Also Published As

Publication number Publication date
WO2013132978A1 (en) 2013-09-12

Similar Documents

Publication Publication Date Title
WO2013132978A1 (en) Assembled battery
JP2013187046A (en) Battery pack
US10608227B2 (en) Electricity storage module
JP7045591B2 (en) Battery module with busbar assembly
JP6233891B2 (en) Power storage device
CN106605317B (en) Assembled battery
JP5374979B2 (en) Batteries and batteries
JP5988668B2 (en) Battery stack
JP2013140707A (en) Battery module and manufacturing method therefor
EP3101714B1 (en) Battery module having voltage sensing member having receptacle structure
WO2014142148A1 (en) Power source
US10090568B2 (en) Battery assembly
JP2010135148A (en) Cell unit, battery module, and battery pack
WO2014147809A1 (en) Battery unit and battery module having stacked battery units
JP2017216114A (en) Power storage module
JP6564048B2 (en) Assembled battery
JP5481970B2 (en) Battery module and manufacturing method thereof
JP7213478B2 (en) Busbar and battery stack
JP6101158B2 (en) Battery pack
JP7210519B2 (en) Battery cells and battery modules
JP2024519124A (en) Battery module having stacked busbar assembly
JP2015164101A (en) Mounting method of battery cover, cover forming member, and battery cover
JP2024530514A (en) Battery module having stacked busbar assembly
KR101327761B1 (en) Battery cell
JP2013134849A (en) Connection structure of single cell group