JP2005166279A - Battery pack - Google Patents

Battery pack Download PDF

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JP2005166279A
JP2005166279A JP2003399647A JP2003399647A JP2005166279A JP 2005166279 A JP2005166279 A JP 2005166279A JP 2003399647 A JP2003399647 A JP 2003399647A JP 2003399647 A JP2003399647 A JP 2003399647A JP 2005166279 A JP2005166279 A JP 2005166279A
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battery
electrode tab
negative electrode
positive electrode
bus bar
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Kenichi Sakai
健一 酒井
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To secure excellent vibration-resistant performance to properly use a battery pack even in an environment easy to receive vibration from the outside like a vehicle or the like, in a battery pack having a structure wherein a laminate battery is used as a unit battery, and a positive electrode tab and a negative electrode tab of the laminate batteries adjacent to each other are connected to each other by a bus bar. <P>SOLUTION: The bus bars 20 for serially connecting a plurality of the laminate batteries 10 each being the unit battery, a positive electrode tabs 13 and a negative electrode tabs 14 of the laminate batteries 10 connected by the bus bars 20, and flanges of a battery armor 11 in the vicinity of the positive electrode tabs 13 and the negative electrode tabs 14 are integrally supported by support members 30. Thereby, when vibration is transmitted from the outside, the bus bars 20 and the laminate batteries 10 are integrally vibrated, so that inconvenience that a crack is generated in the positive electrode 13 or the negative electrode 14 by stress in vibration can effectively be avoided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、電池外装にラミネートフィルムを用いたラミネート電池を単位電池とし、複数の単位電池をバスバーを用いて直列に接続した構造の組電池に関する。   The present invention relates to an assembled battery having a structure in which a laminated battery using a laminated film as a battery exterior is used as a unit battery, and a plurality of unit batteries are connected in series using a bus bar.

金属フィルムと高分子フィルムとを積層してなるラミネートフィルムを電池外装として用い、このラミネートフィルムで発電要素を電解質と共に密封した構造のラミネート電池は、フレキシブルな薄型形状であり、また極めて軽量でありながら高エネルギ密度、高出力密度が得られることから、様々な用途に適用可能な高出力型電池として、高い注目を集めている。   A laminated battery with a structure in which a metal film and a polymer film are laminated as a battery exterior, and the power generation element is sealed together with the electrolyte with this laminate film, has a flexible thin shape and is extremely lightweight. Since high energy density and high power density can be obtained, it has attracted a great deal of attention as a high power battery applicable to various applications.

このようなラミネート電池は、電池単体での出力には限りがあることから、高い出力が要求される用途で用いる場合には、多数のラミネート電池を集合させることで高出力化が図られる。このとき、各ラミネート電池（単位電池）は、通常、所定の数ずつ組み合わされて直列接続され、これを１単位として取り扱われる。このような複数の単位電池の組み合わせは組電池と呼ばれている。   Since such a laminated battery has a limited output of a single battery, when used in an application where a high output is required, a high output can be achieved by assembling a large number of laminated batteries. At this time, each laminated battery (unit battery) is usually combined in a predetermined number and connected in series, and this is handled as one unit. Such a combination of a plurality of unit cells is called an assembled battery.

組電池を構成する複数の単位電池を直列に接続する方法としては、隣接配置される単位電池の正極端子と負極端子とをそれぞれバスバーによって接続する方法が知られている（例えば、特許文献１等を参照。）。
特開２００２−３７３６３８号公報 As a method of connecting a plurality of unit cells constituting an assembled battery in series, a method of connecting a positive electrode terminal and a negative electrode terminal of adjacent unit cells by a bus bar is known (for example, Patent Document 1). See).
JP 2002-373638 A

ところで、上述したラミネート電池においては、電池外装の端部から引き出された金属薄板である正極タブや負極タブがそれぞれ正極端子、負極端子とされているので、このようなラミネート電池を単位電池とする組電池に、特許文献１に記載されているようなバスバーを用いた接続構造をそのまま採用すると、以下のような問題が生じる。   By the way, in the laminated battery mentioned above, since the positive electrode tab and the negative electrode tab which are the metal thin plates pulled out from the edge part of a battery exterior are made into the positive electrode terminal and the negative electrode terminal, respectively, such a laminated battery is used as a unit battery. When the connection structure using the bus bar as described in Patent Document 1 is directly adopted for the assembled battery, the following problems occur.

すなわち、隣接するラミネート電池の正極タブと負極タブとを接続するバスバーにはそれ自体に重量があるため、外部からの振動が組電池に伝わった場合に、ラミネート電池とバスバーとがそれぞれ異なる振動周波数で振動し、その応力が正極タブや負極タブの根元部分に集中することになる。その結果、正極タブや負極タブの根元部分に亀裂が生じて故障に至る可能性がある。このため、このような構造の組電池は、外部からの振動を受け易い、例えば車両等への適用が困難となる。   In other words, the bus bar connecting the positive and negative electrode tabs of the adjacent laminated battery has its own weight, so that when the external vibration is transmitted to the assembled battery, the laminated battery and the bus bar have different vibration frequencies. Therefore, the stress concentrates on the base part of the positive electrode tab or the negative electrode tab. As a result, cracks may occur in the base portions of the positive electrode tab and the negative electrode tab, leading to failure. For this reason, the assembled battery having such a structure is easily subjected to external vibration, for example, it is difficult to apply it to a vehicle.

そこで、本発明は、ラミネート電池を単位電池とし、隣接するラミネート電池の正極タブと負極タブとをバスバーで接続する構造を採用しながら、耐振性能を確保して、車両等のような外部からの振動を受け易い環境でも適切に使用することが可能な組電池を提供することを目的とする。   Therefore, the present invention uses a laminated battery as a unit battery, and adopts a structure in which the positive electrode tab and the negative electrode tab of the adjacent laminated battery are connected by a bus bar, while ensuring vibration resistance performance and from outside such as a vehicle. An object of the present invention is to provide an assembled battery that can be used appropriately even in an environment susceptible to vibration.

本発明に係る組電池は、ラミネートフィルムよりなる電池外装の内部に発電要素及び電解質が収容されると共に、前記電池外装の端部から正極タブ及び負極タブがそれぞれ引き出されてなるラミネート電池を単位電池とし、複数の前記単位電池を並べて、隣接する単位電池の正極タブと負極タブとをバスバーで接続した構造のものである。このような構造の組電池において、本発明では、前記目的を達成するために、バスバーと、このバスバーで接続される単位電池の正極タブ又は負極タブと、この正極タブ又は負極タブ近傍の電池外装の一部とを、支持部材によって一体に支持するようにした。   The assembled battery according to the present invention includes a laminated battery in which a power generation element and an electrolyte are accommodated inside a battery casing made of a laminate film, and a positive electrode tab and a negative electrode tab are drawn out from an end of the battery casing, respectively. And a plurality of the unit cells are arranged side by side and the positive electrode tab and the negative electrode tab of adjacent unit cells are connected by a bus bar. In the assembled battery having such a structure, in the present invention, in order to achieve the above object, a bus bar, a positive electrode tab or a negative electrode tab of a unit battery connected by the bus bar, and a battery exterior in the vicinity of the positive electrode tab or the negative electrode tab And a part of the support are integrally supported by the support member.

このように、バスバーや単位電池の正極タブ又は負極タブ、電池外装の一部が支持部材により一体に支持される構造とすれば、外部からの振動が組電池に伝わったときに、バスバーと単位電池とが一体に振動することになり、振動に起因する応力が正極タブや負極タブの根元部分に集中して亀裂を生じさせるといった問題を有効に回避できる。   Thus, if the bus bar, the positive electrode tab or negative electrode tab of the unit battery, and a part of the battery exterior are integrally supported by the support member, when the external vibration is transmitted to the assembled battery, the bus bar and the unit battery are united. The battery vibrates integrally, and it is possible to effectively avoid the problem that stress caused by vibration concentrates on the base portion of the positive electrode tab or the negative electrode tab and causes cracks.

本発明に係る組電池では、バスバーや単位電池の正極タブ又は負極タブ、電池外装の一部が支持部材により一体に支持されることによって、振動に起因する応力が正極タブや負極タブの根元部分に集中して亀裂を生じさせるといった問題を有効に回避できるので、耐振性能を確保して、車両等のような外部からの振動を受け易い環境でも適切に使用することが可能となる。   In the assembled battery according to the present invention, the positive electrode tab or the negative electrode tab of the bus bar, the unit battery, or a part of the battery exterior is integrally supported by the support member, so that the stress caused by vibration is the root part of the positive electrode tab or the negative electrode tab. Therefore, it is possible to effectively avoid the problem of concentrating on the cracks and causing cracks, so that the vibration resistance can be ensured and the apparatus can be used appropriately even in an environment that is susceptible to external vibration such as a vehicle.

以下、本発明に係る組電池の具体的な実施形態について、図面を参照しながら詳細に説明する。   Hereinafter, specific embodiments of an assembled battery according to the present invention will be described in detail with reference to the drawings.

本発明に係る組電池は、直列接続される複数の単位電池として、ラミネート電池を用いている。ラミネート電池１０は、図１に示すように、上下一対のラミネートフィルムがその外周部分のフランジ部にて熱融着されたものを電池外装１１として用い、この電池外装１１の内部に、発電要素としての積層電極１２を電解質と共に密封した構造となっている。   The assembled battery according to the present invention uses a laminated battery as a plurality of unit batteries connected in series. As shown in FIG. 1, the laminated battery 10 uses, as a battery exterior 11, a pair of upper and lower laminated films that are heat-sealed at the flange portion of the outer peripheral portion, and inside the battery exterior 11 as a power generation element. The laminated electrode 12 is sealed with the electrolyte.

電池外装１１を構成するラミネートフィルムは、例えば、アルミニウム等よりなる金属フィルムと、ＰＥ（ポリエチレン）或いはＰＰ（ポリプロピレン）等よりなる高分子樹脂フィルムとが積層されてなるものであり、このようなラミネートフィルムが積層電極１２よりも若干大きめの長方形のシート状に成形されて、上下一対の外装材とされている。これら上下一対の外装材のうち、一方の外装材は、その中央部に積層電極１２を収納する凹部が設けられたカップ状とされ、他方の外装材は、前記凹部の開口部を覆うように平坦状とされている。そして、一方の外装材に設けられた凹部内に積層電極１２を電解質と共に収納した状態で、この凹部を覆うように他方の外装材を配置して、これら上下一対の外装材をその外周部分に設けたフランジ部にて熱融着することで、上下一対の外装材が一体化されて電池外装１１とされ、この電池外装１１によって積層電極１２が電解質と共に密封された構造となる。   The laminate film constituting the battery exterior 11 is formed by laminating a metal film made of aluminum or the like and a polymer resin film made of PE (polyethylene) or PP (polypropylene), for example. The film is formed into a rectangular sheet that is slightly larger than the laminated electrode 12 to form a pair of upper and lower exterior materials. Of these pair of upper and lower exterior materials, one of the exterior materials is cup-shaped with a concave portion that houses the laminated electrode 12 at the center, and the other exterior material covers the opening of the concave portion. It is flat. Then, in a state where the laminated electrode 12 is housed together with the electrolyte in the recess provided in one of the exterior materials, the other exterior material is disposed so as to cover the recess, and the pair of upper and lower exterior materials are disposed on the outer peripheral portion. By heat-sealing at the provided flange portion, a pair of upper and lower exterior materials are integrated into a battery exterior 11, and the laminated electrode 12 is sealed together with the electrolyte by the battery exterior 11.

電池外装１１の内部に密封される発電要素としての積層電極１２は、複数枚の正極板及び負極板がセパレータを介在しつつ順次積層されてなるものである。積層電極１２を構成する各正極板は、それぞれ一方の電極端子としての正極タブ１３に接続されている。また、積層電極１２を構成する各負極板は、それぞれ他方の電極端子としての負極タブ１４に接続されている。そして、一方の電極端子としての正極タブ１３及び他方の電極端子としての負極タブ１４が、電池外装１１の長手方向の端部からそれぞれ外部に引き出されている。   The laminated electrode 12 serving as a power generation element sealed inside the battery casing 11 is formed by sequentially laminating a plurality of positive and negative plates with a separator interposed therebetween. Each positive electrode plate constituting the laminated electrode 12 is connected to a positive electrode tab 13 as one electrode terminal. Moreover, each negative electrode plate which comprises the laminated electrode 12 is connected to the negative electrode tab 14 as an other electrode terminal, respectively. And the positive electrode tab 13 as one electrode terminal and the negative electrode tab 14 as the other electrode terminal are each pulled out from the end portion of the battery casing 11 in the longitudinal direction.

本発明に係る組電池では、以上のように構成されるラミネート電池１０を単位電池とし、図２に示すように、このラミネート電池１０を水平方向に複数個（本例では４つ）並べて配置している。このとき、各ラミネート電池１０は、正極タブ１３と負極タブ１４の向きが、隣接するラミネート電池１０間で互い違いとなるように配置される。そして、隣接するラミネート電池１０の正極タブ１３と負極タブ１４とを電気的接続部材であるバスバー２０によって接続することで、複数のラミネート電池１０を直列に接続して高出力を確保した構造となっている。   In the assembled battery according to the present invention, the laminated battery 10 configured as described above is used as a unit battery, and a plurality of the laminated batteries 10 (four in this example) are arranged in a horizontal direction as shown in FIG. ing. At this time, the laminated batteries 10 are arranged so that the directions of the positive electrode tab 13 and the negative electrode tab 14 are staggered between the adjacent laminated batteries 10. And by connecting the positive electrode tab 13 and the negative electrode tab 14 of the adjacent laminated battery 10 by the bus bar 20 which is an electrical connection member, it becomes the structure which connected the several laminated battery 10 in series, and ensured high output. ing.

このように、隣接するラミネート電池１０の正極タブ１３と負極タブ１４とをバスバー２０で接続する構造とした場合、このままの状態では、外部からの振動が組電池に伝わった場合にラミネート電池１０とバスバー２０とがそれぞれ異なる振動周波数で振動して、図３に示すように、バスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４の根元部分に亀裂が生じる虞がある。そこで、本発明に係る組電池では、バスバー２０と、このバスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４と、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部とを支持部材によって一体に支持することで耐振性能を確保し、外部からの振動が伝わった場合でも正極タブ１３や負極タブ１４の亀裂といった問題が生じないようにしている。   Thus, when it is set as the structure which connects the positive electrode tab 13 and negative electrode tab 14 of the adjacent laminated battery 10 with the bus-bar 20, in this state, when the vibration from the outside is transmitted to the assembled battery, As shown in FIG. 3, the bus bar 20 may vibrate at different vibration frequencies, and there is a risk that cracks may occur in the base portions of the positive electrode tab 13 and the negative electrode tab 14 of the laminated battery 10 connected by the bus bar 20. Therefore, in the battery pack according to the present invention, the bus bar 20, the positive electrode tab 13 and the negative electrode tab 14 of the laminate battery 10 connected by the bus bar 20, and the laminate battery 10 positioned in the vicinity of the positive electrode tab 13 and the negative electrode tab 14. The vibration-proof performance is ensured by integrally supporting the flange portion of the battery exterior 11 with a support member so that the problem of cracking of the positive electrode tab 13 and the negative electrode tab 14 does not occur even when external vibration is transmitted. Yes.

本発明に係る組電池で用いられる支持部材の一例を図４に示す。この図４に示す支持部材３０は、例えば樹脂等の電気的絶縁性の高い材料が一対の挟持片３１，３２を有するクリップ状に成形されてなる。そして、この支持部材３０の一対の挟持片３１，３２間には、例えばポッティング材等の弾力性を有する樹脂材よりなる充填材３３が充填されている。なお、ポッティング材は２液混合硬化の樹脂材で、硬化した状態でも弾力性を有するものであり、一般的には異なる部材同士を弾力的に接合する場合等に用いられるものである。   An example of the supporting member used in the assembled battery according to the present invention is shown in FIG. The support member 30 shown in FIG. 4 is formed by molding a material having high electrical insulation such as resin into a clip shape having a pair of sandwiching pieces 31 and 32. Between the pair of sandwiching pieces 31 and 32 of the support member 30, a filler 33 made of a resin material having elasticity such as a potting material is filled. The potting material is a two-component mixed-curing resin material that has elasticity even in a cured state, and is generally used when elastically joining different members.

本発明に係る組電池では、以上のように構成される支持部材３０が、水平方向に並べて配置された複数個のラミネート電池１０の全長（図２に示した例では４つのラミネート電池１０の短辺方向の長さの総和）と略等しい長さに形成される。そして、図５及び図６に示すように、水平方向に並ぶ複数個のラミネート電池１０の一方の端部側に配置されるバスバー２０と、このバスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４と、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部とが、１つの支持部材３０の一対の挟持片３１，３２間に挿入され、これら一対の挟持片３１，３２により厚み方向に挟み込まれて一体に支持される。また、水平方向に並ぶ複数個のラミネート電池１０の他方の端部側に配置されるバスバー２０と、このバスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４と、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部とが、他の支持部材３０の一対の挟持片３１，３２間に挿入され、これら一対の挟持片３１，３２により厚み方向に挟み込まれて一体に支持される。   In the assembled battery according to the present invention, the support member 30 configured as described above has a total length of a plurality of laminated batteries 10 arranged in a horizontal direction (in the example shown in FIG. 2, the short length of the four laminated batteries 10). The total length in the side direction) is substantially equal to the length. As shown in FIGS. 5 and 6, the bus bar 20 disposed on one end side of the plurality of laminated batteries 10 arranged in the horizontal direction, and the positive electrode tab 13 of the laminated battery 10 connected by the bus bar 20. And the negative electrode tab 14 and the flange portion of the battery casing 11 of the laminated battery 10 located in the vicinity of the positive electrode tab 13 and the negative electrode tab 14 are inserted between a pair of sandwiching pieces 31 and 32 of one support member 30, The pair of sandwiching pieces 31 and 32 are sandwiched in the thickness direction and are integrally supported. Further, the bus bar 20 disposed on the other end side of the plurality of laminated batteries 10 arranged in the horizontal direction, the positive electrode tab 13 and the negative electrode tab 14 of the laminated battery 10 connected by the bus bar 20, and the positive electrode tabs 13. And the flange portion of the battery casing 11 of the laminated battery 10 positioned in the vicinity of the negative electrode tab 14 are inserted between the pair of sandwiching pieces 31 and 32 of the other support member 30, and the thickness is reduced by the pair of sandwiching pieces 31 and 32. It is sandwiched in the direction and supported integrally.

このとき、支持部材３０の一対の挟持片３１，３２間にはポッティング材等の充填材３３が充填されているので、支持部材３０の一対の挟持片３１，３２間に支持されるバスバー２０や、このバスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部は、充填材３３の作用で弾力的に支持されて、振動発生時の応力が緩和されることになる。   At this time, since a filling material 33 such as a potting material is filled between the pair of sandwiching pieces 31 and 32 of the support member 30, the bus bar 20 supported between the pair of sandwiching pieces 31 and 32 of the support member 30 In addition, the positive electrode tab 13 and the negative electrode tab 14 of the laminate battery 10 connected by the bus bar 20, and the flange portion of the battery outer casing 11 of the laminate battery 10 located in the vicinity of the positive electrode tab 13 and the negative electrode tab 14 act as fillers 33. Therefore, the stress at the time of vibration generation is relieved.

以上説明したように、本発明に係る組電池では、単位電池である複数個のラミネート電池１０を接続するためのバスバー２０と、このバスバー２０で接続されるラミネート電池１０の正極タブ１３や負極タブ１４と、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部とを、支持部材３０の一対の挟持片３１，３２間に挟み込んで一体に支持するようにしているので、外部からの振動が組電池に伝わったときには、バスバー２０と各ラミネート電池１０とが一体に振動することになる。その結果、バスバー２０で接続される正極タブ１３や負極タブ１４の根元部分に応力が集中してここに亀裂を生じさせるといった不都合を有効に回避することができ、振動に起因する故障を有効に防止することができる。   As described above, in the assembled battery according to the present invention, the bus bar 20 for connecting a plurality of laminated batteries 10 as unit batteries, and the positive electrode tab 13 and the negative electrode tab of the laminated battery 10 connected by the bus bar 20. 14 and the flange portion of the battery casing 11 of the laminated battery 10 located in the vicinity of the positive electrode tab 13 and the negative electrode tab 14 are sandwiched between a pair of clamping pieces 31 and 32 of the support member 30 and are integrally supported. Therefore, when external vibration is transmitted to the assembled battery, the bus bar 20 and each laminated battery 10 vibrate integrally. As a result, it is possible to effectively avoid the inconvenience that stress concentrates on the base portions of the positive electrode tab 13 and the negative electrode tab 14 connected by the bus bar 20 and causes cracks therein, and the failure caused by vibration is effectively prevented. Can be prevented.

このように、本発明に係る組電池は、良好な耐振性能が確保されるので、車両等のような外部からの振動を受け易い環境でも適切に使用することが可能となる。   As described above, since the assembled battery according to the present invention ensures good vibration resistance, it can be appropriately used even in an environment that is susceptible to external vibration such as a vehicle.

また、特に、本例の組電池では、支持部材３０の一対の挟持片３１，３２間にポッティング材等の充填材３３を充填し、この充填材３３の作用でバスバー２０や、このバスバー２０によって接続されるラミネート電池１０の正極タブ１３や負極タブ１４、これら正極タブ１３や負極タブ１４の近傍に位置するラミネート電池１０の電池外装１１のフランジ部を弾力的に支持するようにしているので、振動発生時の応力を大幅に緩和することができ、高い耐振性能を確保することが可能となる。   In particular, in the assembled battery of this example, a filling material 33 such as a potting material is filled between the pair of sandwiching pieces 31 and 32 of the support member 30, and the action of the filling material 33 causes the bus bar 20 or the bus bar 20 to Since the positive electrode tab 13 and the negative electrode tab 14 of the laminate battery 10 to be connected, and the flange portion of the battery exterior 11 of the laminate battery 10 located in the vicinity of the positive electrode tab 13 and the negative electrode tab 14 are elastically supported, The stress at the time of vibration generation can be greatly relieved, and high vibration resistance can be ensured.

また、本例の組電池では、支持部材３０を樹脂等の電気的絶縁性の高い材料で形成しているので、この支持部材３０によって外部との絶縁を確保することができる。すなわち、ラミネート電池１０の正極タブ１３や負極タブ１４、バスバー２０は、組電池の作動時には高電圧となる部分であり、この部分が露出した状態であると外部との電気的短絡が問題となるので、何らかの絶縁機構を設けて外部との電気的短絡を防止する必要があるが、支持部材３０を樹脂等の電気的絶縁性の高い材料で形成することにより、この支持部材３０が絶縁機構としての機能も兼ねることになるので、他の絶縁機構を別途設ける必要がない。   Moreover, in the assembled battery of this example, since the support member 30 is formed of a material having high electrical insulation such as a resin, the support member 30 can ensure insulation from the outside. That is, the positive electrode tab 13, the negative electrode tab 14, and the bus bar 20 of the laminated battery 10 are portions that become high voltage when the assembled battery is operated. If this portion is exposed, an electrical short circuit with the outside becomes a problem. Therefore, it is necessary to provide some kind of insulation mechanism to prevent an electrical short circuit with the outside. However, by forming the support member 30 from a material having high electrical insulation such as a resin, the support member 30 can be used as an insulation mechanism. Therefore, it is not necessary to provide another insulation mechanism.

更に、本例の組電池では、支持部材３０の一対の挟持片３１，３２間に充填する充填材３３として、ポッティング材等の電気的絶縁性の高い樹脂を用いているので、支持部材３０内部での絶縁性も確保できる。したがって、１つの支持部材３０で一体に支持する正極タブ１３や負極タブ１４のうちで電気的に接続していないもの同士の電気的短絡を確実に防止することができ、図５や図６に示したように、組電池を構成する全てのラミネート電池１０に対して支持部材３０を共通化して、その分、部品点数の削減を図ることができる。   Further, in the assembled battery of this example, since the filling material 33 filled between the pair of sandwiching pieces 31 and 32 of the support member 30 is made of a highly electrically insulating resin such as a potting material, the inside of the support member 30 Insulation can be secured. Therefore, it is possible to reliably prevent an electrical short circuit between the positive electrode tab 13 and the negative electrode tab 14 which are integrally supported by one support member 30 and which are not electrically connected, as shown in FIGS. As shown, the supporting member 30 can be made common to all the laminated batteries 10 constituting the assembled battery, and the number of parts can be reduced accordingly.

なお、以上は、本発明に係る組電池の具体的な一例を示したものであり、本発明が以上の例に限定されるものではなく、様々な変形が可能であることは勿論である。例えば、以上の例では４つのラミネート電池１０を水平方向に並べた構成としているが、組電池を構成するラミネート電池１０の数は、適宜設定することが可能である。また、ラミネート電池１０を並べる方向も、水平方向に限らず積層方向に並べることも可能であり、また、水平方向と積層方向の両方向に並べるようにしてもよい。この場合も、隣接するラミネート電池１０の正極タブ１３と負極タブ１４とがバスバー２０によって接続されるようにし、支持部材３０を組電池の総厚に対応した大きさに形成して、これらバスバー２０と、正極タブ１３や負極タブ１４と、ラミネート電池１０の外装筐体１１のフランジ部とを支持部材３０で一体に支持するようにすれば、上述した例と同様の効果を得ることができる。   The above is a specific example of the assembled battery according to the present invention, and the present invention is not limited to the above example, and various modifications are of course possible. For example, although the four laminated batteries 10 are arranged in the horizontal direction in the above example, the number of the laminated batteries 10 constituting the assembled battery can be set as appropriate. Further, the direction in which the laminated batteries 10 are arranged is not limited to the horizontal direction, and can be arranged in the stacking direction, or may be arranged in both the horizontal direction and the stacking direction. Also in this case, the positive electrode tab 13 and the negative electrode tab 14 of the adjacent laminated battery 10 are connected by the bus bar 20, and the support member 30 is formed in a size corresponding to the total thickness of the assembled battery. If the positive electrode tab 13 and the negative electrode tab 14 and the flange portion of the outer casing 11 of the laminated battery 10 are integrally supported by the support member 30, the same effect as the above-described example can be obtained.

また、支持部材３０の形状も、上述したクリップ形状に限らず様々な形状を採用することが可能であり、例えば図７に示すように、一対の板状部材（挟持片３１，３２）を連結部材３４で回動可能に連結し、これら一対の板状部材間に、バスバー２０と、正極タブ１３や負極タブ１４と、ラミネート電池１０の外装筐体１１のフランジ部とを挟み込むことで、これらを一体に支持する構成としてもよい。この場合にも、一対の板状部材間には、ポッティング材等の充填材３３を充填することが望ましい。   Further, the shape of the support member 30 is not limited to the above-described clip shape, and various shapes can be adopted. For example, as shown in FIG. 7, a pair of plate-like members (clamping pieces 31 and 32) are connected. The member 34 is rotatably connected, and the bus bar 20, the positive electrode tab 13 and the negative electrode tab 14, and the flange portion of the outer casing 11 of the laminated battery 10 are sandwiched between the pair of plate-like members. It is good also as a structure which supports these integrally. Also in this case, it is desirable to fill a filler 33 such as a potting material between the pair of plate-like members.

本発明に係る組電池で単位電池として用いられるラミネート電池を示す斜視図である。It is a perspective view which shows the laminated battery used as a unit battery with the assembled battery which concerns on this invention. 複数のラミネート電池を水平方向に並べてバスバーで直列に接続した状態を示す斜視図である。It is a perspective view which shows the state which arranged the some laminated battery in the horizontal direction, and connected in series with the bus-bar. 耐振性能が確保されていない場合にラミネート電池の正極タブや負極タブに亀裂が生じる様子を説明する斜視図である。It is a perspective view explaining a mode that a crack arises in a positive electrode tab and a negative electrode tab of a lamination battery when vibration proof performance is not secured. 本発明に係る組電池で用いられる支持部材の一例を示す斜視図である。It is a perspective view which shows an example of the supporting member used with the assembled battery which concerns on this invention. 本発明に係る組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery which concerns on this invention. 本発明に係る組電池の平面図である。It is a top view of the assembled battery which concerns on this invention. 本発明に化係る組電池で用いられる支持部材の他例を示す斜視図である。It is a perspective view which shows the other example of the supporting member used with the assembled battery which concerns on this invention.

符号の説明Explanation of symbols

１０ ラミネート電池
１１ 電池外装
１３ 正極タブ
１４ 負極タブ
２０ バスバー
３０ 支持部材
３１，３２ 挟持片
３３ 充填材 DESCRIPTION OF SYMBOLS 10 Laminated battery 11 Battery exterior 13 Positive electrode tab 14 Negative electrode tab 20 Bus bar 30 Support member 31,32 Clamping piece 33 Filler

Claims (5)

ラミネートフィルムよりなる電池外装の内部に発電要素及び電解質が収容されると共に、前記電池外装の端部から正極タブ及び負極タブがそれぞれ引き出されてなるラミネート電池を単位電池とし、複数の前記単位電池を並べて、隣接する単位電池の正極タブと負極タブとをバスバーで接続した組電池において、
前記バスバーと、当該バスバーで接続される前記単位電池の正極タブ又は負極タブと、当該正極タブ又は負極タブ近傍の前記電池外装の一部とが、支持部材によって一体に支持されていることを特徴とする組電池。 A power generation element and an electrolyte are housed inside a battery casing made of a laminate film, and a laminated battery in which a positive electrode tab and a negative electrode tab are respectively drawn out from an end of the battery outer casing is defined as a unit battery, and a plurality of the unit batteries are included. In an assembled battery in which the positive electrode tab and the negative electrode tab of adjacent unit cells are connected by a bus bar,
The bus bar, a positive electrode tab or a negative electrode tab of the unit battery connected by the bus bar, and a part of the battery exterior in the vicinity of the positive electrode tab or the negative electrode tab are integrally supported by a support member. The assembled battery. 前記支持部材は一対の挟持片を有し、これら挟持片間に、前記バスバーと、当該バスバーで接続される前記単位電池の正極タブ又は負極タブと、当該正極タブ又は負極タブ近傍の前記電池外装の一部とを挟み込むことで、これらを一体に支持することを特徴とする請求項１に記載の組電池。   The support member has a pair of sandwiching pieces, and between the sandwiching pieces, the bus bar, a positive electrode tab or a negative electrode tab of the unit battery connected by the bus bar, and the battery exterior in the vicinity of the positive electrode tab or the negative electrode tab. The assembled battery according to claim 1, wherein the battery pack is integrally supported by sandwiching a part of the battery pack. 前記支持部材が絶縁材料よりなることを特徴とする請求項２に記載の組電池。   The assembled battery according to claim 2, wherein the support member is made of an insulating material. 前記支持部材の一対の挟持片間に充填材が充填されていることを特徴とする請求項２又は３に記載の組電池。   The assembled battery according to claim 2, wherein a filler is filled between the pair of sandwiching pieces of the support member. 前記充填材が絶縁材料よりなることを特徴とする請求項４に記載の組電池。   The assembled battery according to claim 4, wherein the filler is made of an insulating material.
JP2003399647A 2003-11-28 2003-11-28 Battery pack Pending JP2005166279A (en)

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Cited By (9)

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JP2007250330A (en) * 2006-03-15 2007-09-27 Nissan Motor Co Ltd Battery module and its manufacturing method
JP2010010381A (en) * 2008-06-26 2010-01-14 Fdk Corp Electricity accumulation unit and its manufacturing method
US9083040B2 (en) 2012-04-06 2015-07-14 Samsung Sdi Co., Ltd. Rechargeable battery pack
US9236617B2 (en) 2006-12-11 2016-01-12 Nissan Motor Co., Ltd. Battery module
CN109860442A (en) * 2017-11-30 2019-06-07 陈文仿 Multi-joint single lithium battery group encapsulation technology
US10396333B2 (en) 2015-11-04 2019-08-27 Samsung Electronics Co., Ltd. Flexible electrochemical device pack
CN112805869A (en) * 2018-10-01 2021-05-14 本田技研工业株式会社 Battery module and battery pack
WO2022143760A1 (en) * 2020-12-29 2022-07-07 Dongguan Poweramp Technology Limited Method for manufacturing battery module, battery module, battery pack, and unmanned aerial vehicle
US11569541B2 (en) 2014-06-30 2023-01-31 Black & Decker Inc. Battery pack for a cordless power tool

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007250330A (en) * 2006-03-15 2007-09-27 Nissan Motor Co Ltd Battery module and its manufacturing method
US9236617B2 (en) 2006-12-11 2016-01-12 Nissan Motor Co., Ltd. Battery module
JP2010010381A (en) * 2008-06-26 2010-01-14 Fdk Corp Electricity accumulation unit and its manufacturing method
US9083040B2 (en) 2012-04-06 2015-07-14 Samsung Sdi Co., Ltd. Rechargeable battery pack
US11569541B2 (en) 2014-06-30 2023-01-31 Black & Decker Inc. Battery pack for a cordless power tool
US11837690B2 (en) 2014-06-30 2023-12-05 Black & Decker Inc. Battery pack for a cordless power tool
US10396333B2 (en) 2015-11-04 2019-08-27 Samsung Electronics Co., Ltd. Flexible electrochemical device pack
CN109860442A (en) * 2017-11-30 2019-06-07 陈文仿 Multi-joint single lithium battery group encapsulation technology
CN112805869A (en) * 2018-10-01 2021-05-14 本田技研工业株式会社 Battery module and battery pack
WO2022143760A1 (en) * 2020-12-29 2022-07-07 Dongguan Poweramp Technology Limited Method for manufacturing battery module, battery module, battery pack, and unmanned aerial vehicle

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