JP2009272161A - Laminated battery, battery pack, and vehicle - Google Patents

Laminated battery, battery pack, and vehicle Download PDF

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JP2009272161A
JP2009272161A JP2008122294A JP2008122294A JP2009272161A JP 2009272161 A JP2009272161 A JP 2009272161A JP 2008122294 A JP2008122294 A JP 2008122294A JP 2008122294 A JP2008122294 A JP 2008122294A JP 2009272161 A JP2009272161 A JP 2009272161A
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current collecting
exterior member
collecting terminals
electrode body
battery
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Sho Tadokoro
翔 田所
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat radiation performance in a laminated battery. <P>SOLUTION: The laminated battery 100 has an electrode body 10 housed in an outer package member 80. The outer package member 80 has a housing space 82 to house the electrode body 10 formed by superposing a film material 81. The electrode body 10 has a plurality of current collector terminals 50 which are drawn out to the outside of the outer package member 80 from between the film materials 81 in a state superposed by interposing a thermoplastic resin 92. At the peripheral part 85 of a housing space 82, the film material 81 and the thermoplastic resin 92 are adhered and the peripheral part 85 is closed, while the plurality of current collector terminals 30, 50 are jointed to the outer package member 80. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は電極体を外装部材に収容したラミネート型電池に関する。   The present invention relates to a laminate type battery in which an electrode body is accommodated in an exterior member.

ラミネート型電池は、例えば、特開２００５−５６８１５号公報に開示されている。同公報では、略矩形のラミネートフィルムからなる電池ケース（外装部材）に、電極体を収納したリチウムイオン二次電池が開示されている。例えば、当該公報の図４に示されているように、正極シート及び負極シートの間にセパレータを挿入して、正極シート及び負極シートが積層された電極体を備えている。正極シートと負極シートの電極シートは、それぞれ外装部材内で電極端子が接続されている。当該電極端子は、外装部材（ラミネートフィルム）を合わせた部位を通って外部に引出されており、当該ラミネートフィルムを合わせた部位は熱溶着によって封止されている。
特開２００５−５６８１５号公報 A laminated battery is disclosed in, for example, Japanese Patent Application Laid-Open No. 2005-56815. This publication discloses a lithium ion secondary battery in which an electrode body is housed in a battery case (exterior member) made of a substantially rectangular laminate film. For example, as shown in FIG. 4 of the publication, a separator is inserted between the positive electrode sheet and the negative electrode sheet, and an electrode body in which the positive electrode sheet and the negative electrode sheet are laminated is provided. Electrode terminals of the positive electrode sheet and the negative electrode sheet are connected to each other in the exterior member. The electrode terminal is drawn out through a portion where the exterior member (laminate film) is combined, and the portion where the laminate film is combined is sealed by thermal welding.
JP 2005-56815 A

特開２００５−５６８１５号公報では、電極シートは外装部材内で纏められて電極端子が接続されており、当該端子は、外装部材（ラミネートフィルム）を合わせた部位を通って外部に引出されており、当該ラミネートフィルムを合わせた部位は熱溶着によって封止されている。   In Japanese Patent Application Laid-Open No. 2005-56815, an electrode sheet is collected in an exterior member and connected to an electrode terminal, and the terminal is pulled out through a portion where the exterior member (laminate film) is combined. The portion where the laminate films are combined is sealed by heat welding.

本発明者は、かかる構造について、放電時や充電時に電極体が発熱したときに、熱が外装部材内に溜まりやすいという問題を見出した。本発明が解決しようとする主たる課題は、かかるラミネート型電池について放熱性能を改善することである。   The present inventor has found that such a structure has a problem that heat easily accumulates in the exterior member when the electrode body generates heat during discharging or charging. The main problem to be solved by the present invention is to improve the heat dissipation performance of such a laminated battery.

本発明に係るラミネート型電池は、電極体を外装部材に収容したラミネート型電池である。外装部材は、フィルム材を重ね合わせることによって、電極体を収容する収容空間が形成されている。電極体は、熱可塑性樹脂を介在させて重ねられた状態でフィルム材の間から外装部材の外に引き出された複数の集電端子を有している。収容空間の周縁部において、フィルム材および熱可塑性樹脂を溶着することによって、周縁部が閉じられているとともに複数の集電端子が外装部材に接合されている。   The laminate type battery according to the present invention is a laminate type battery in which an electrode body is accommodated in an exterior member. The exterior member has an accommodation space for accommodating the electrode body by overlapping film materials. The electrode body has a plurality of current collecting terminals drawn out from between the film materials to the outside of the exterior member in a state of being overlapped with a thermoplastic resin interposed. By welding the film material and the thermoplastic resin at the peripheral portion of the housing space, the peripheral portion is closed and a plurality of current collecting terminals are joined to the exterior member.

かかるラミネート型電池は、複数の集電端子が熱可塑性樹脂を介在させて重ねられた状態でフィルム材の間から外装部材の外に引き出されており、収容空間の周縁部において、フィルム材および熱可塑性樹脂を溶着することによって、複数の集電端子が外装部材に接合されている。このため、収容空間の周縁部の同じ位置から複数の集電端子を引き出すことができ、より多くの集電端子を外装部材から引き出すことが可能である。外装部材内で生じた熱は、これらの外装部材から引き出された集電端子から効率よく放熱される。このラミネート型電池は、より多くの集電端子が外装部材から引き出せるので放熱性能が良い。   Such a laminate type battery is drawn out of the exterior member from between the film materials in a state where a plurality of current collecting terminals are overlapped with a thermoplastic resin interposed therebetween. A plurality of current collecting terminals are joined to the exterior member by welding the plastic resin. For this reason, it is possible to draw out a plurality of current collecting terminals from the same position on the peripheral edge of the housing space, and it is possible to draw more current collecting terminals from the exterior member. The heat generated in the exterior members is efficiently radiated from the current collecting terminals drawn from these exterior members. This laminated battery has good heat dissipation performance because more current collecting terminals can be drawn out from the exterior member.

ラミネート型電池は、電極体に正負の極性を有する電極が含まれている場合には、複数の集電端子は、極性が同じ電極の集電端子でもよい。この場合、複数の集電端子は、外装部材の外で接合されていてもよい。集電端子が外装部材の外で接合された場合には、接合プロセスで発生する散りが電極体の収容空間に入ることを防止でき、当該散りが収容空間に入ることに起因して電池性能が劣化するのを防止できる。   In the laminated battery, when the electrode body includes electrodes having positive and negative polarities, the plurality of current collecting terminals may be current collecting terminals of electrodes having the same polarity. In this case, the plurality of current collecting terminals may be joined outside the exterior member. When the current collecting terminal is joined outside the exterior member, it is possible to prevent scattering generated in the joining process from entering the housing space of the electrode body, and battery performance is reduced due to the scattering entering the housing space. Deterioration can be prevented.

また、電極体に正負の極性を有する電極が含まれている場合には、複数の集電端子は、極性が異なる電極の集電端子でもよい。この場合、かかるラミネート型電池によれば、極性が異なる電極シートの集電端子を近い位置に配設することができる。このため、集電端子間の電気伝導経路を短くすることができ、両者間の抵抗値を低減させることができる。また、電極体は、複数のバイポーラ型電極が含まれていてもよい。   When the electrode body includes electrodes having positive and negative polarities, the plurality of current collecting terminals may be current collecting terminals of electrodes having different polarities. In this case, according to such a laminate type battery, the current collecting terminals of the electrode sheets having different polarities can be disposed at close positions. For this reason, the electric conduction path between the current collecting terminals can be shortened, and the resistance value between the two can be reduced. The electrode body may include a plurality of bipolar electrodes.

以下、本発明の一実施形態に係る電池を図面に基づいて説明する。なお、同じ作用を奏する部材、部位には、適宜、同じ符号を付している。   Hereinafter, a battery according to an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected suitably to the member and site | part which show | play the same effect | action.

ラミネート型電池１００は、図１および図２に示すように、電極体１０と、外装部材８０とを備えている。電極体１０は、この実施形態では、３枚の電極シート（正極シート２０と、負極シート４０）が積層された積層電極体で構成されている。   As shown in FIGS. 1 and 2, the laminate type battery 100 includes an electrode body 10 and an exterior member 80. In this embodiment, the electrode body 10 is composed of a laminated electrode body in which three electrode sheets (a positive electrode sheet 20 and a negative electrode sheet 40) are laminated.

正極シート２０（正の極性を有する電極）は、図１に示すように、この実施形態では、アルミニウム箔からなる集電箔２２(集電体)の両面に、電極材料２４（正極活物質）が塗工されている。当該電極材料２４（正極活物質）は、例えば、マンガン酸リチウム（ＬｉＭｎ２Ｏ４）、コバルト酸リチウム（ＬｉＣｏＯ２）、ニッケル酸リチウム（ＬｉＮｉＯ２）などが挙げられる。この正極シート２０は集電端子３０を備えている。この実施形態では、集電箔２２の一部が長方形形状で細長く延びており、当該部位に集電端子３０が構成されている。当該集電端子３０には、電極材料２４は塗工されていない。 As shown in FIG. 1, the positive electrode sheet 20 (electrode having a positive polarity) is formed on both surfaces of a current collector foil 22 (current collector) made of an aluminum foil, in this embodiment, with an electrode material 24 (positive electrode active material). Is coated. Examples of the electrode material 24 (positive electrode active material) include lithium manganate (LiMn 2 O 4 ), lithium cobaltate (LiCoO 2 ), and lithium nickelate (LiNiO 2 ). The positive electrode sheet 20 includes a current collecting terminal 30. In this embodiment, a part of the current collector foil 22 is elongated in a rectangular shape, and the current collector terminal 30 is configured at the site. The electrode material 24 is not applied to the current collecting terminal 30.

負極シート４０（負の極性を有する電極）は、この実施形態では、銅箔からなる集電箔４２(集電体)の片面に電極材料４４（負極活物質）が塗工されている。当該電極材料４４に含まれる好適な負極活物質としては、例えば、グラファイト（Graphite）やアモルファスカーボン（Amorphous Carbon）などの炭素系材料、リチウム含有遷移金属酸化物や遷移金属窒化物等などが挙げられる。この実施形態では、集電箔４２の一部が長方形形状で細長く延びており、当該部位に集電端子５０が構成されている。当該集電端子５０には、電極材料４４は塗工されていない。   In this embodiment, the negative electrode sheet 40 (electrode having negative polarity) is coated with an electrode material 44 (negative electrode active material) on one surface of a current collector foil 42 (current collector) made of copper foil. Suitable negative electrode active materials contained in the electrode material 44 include, for example, carbon-based materials such as graphite and amorphous carbon, lithium-containing transition metal oxides, transition metal nitrides, and the like. . In this embodiment, a part of the current collecting foil 42 is elongated in a rectangular shape, and the current collecting terminal 50 is configured at the portion. The electrode material 44 is not applied to the current collecting terminal 50.

正極シート２０と負極シート４０はセパレータ６０によって隔てられている。この実施形態では、セパレータ６０は、イオン性物質が透過可能なポリプロピレン製の微多孔膜が用いられた袋で構成されている。セパレータ６０は、正極シート２０の少なくとも電極材料２４が塗工された塗工部に被せられる。   The positive electrode sheet 20 and the negative electrode sheet 40 are separated by a separator 60. In this embodiment, the separator 60 is formed of a bag using a polypropylene microporous membrane that is permeable to an ionic substance. The separator 60 is placed on the coated portion of the positive electrode sheet 20 on which at least the electrode material 24 is coated.

外装部材８０は、電極体１０を収容する部材であり、図２に示すように、フィルム材８１を重ね合わせることによって、電極体１０を収容する収容空間８２が形成されている。   The exterior member 80 is a member that accommodates the electrode body 10, and as illustrated in FIG. 2, an accommodation space 82 that accommodates the electrode body 10 is formed by overlapping the film material 81.

この実施形態では、図３に示すように、ポリプロピレン層８６、アルミニウム層８７及びナイロン層８８をこの順で積層したフィルム材（ラミネートフィルム、ラミネートシート）を袋状にしたものである。ポリプロピレン層８６は熱溶着性を確保するために、アルミニウム層８７は防湿性を確保するために、ナイロン層８８はプレス成形性を確保するために用いられている。   In this embodiment, as shown in FIG. 3, a film material (laminate film, laminate sheet) in which a polypropylene layer 86, an aluminum layer 87, and a nylon layer 88 are laminated in this order is formed into a bag shape. The polypropylene layer 86 is used to ensure heat weldability, the aluminum layer 87 is used to ensure moisture resistance, and the nylon layer 88 is used to ensure press formability.

熱溶着性を確保する層８６は、ポリプロピレン（ＰＰ）に代えて低密度ポリエチレン（ＬＤＰＥ）層を用いてもよい。また、図示は省略するが、プレス成形性を確保するナイロン層８８に、さらにポリエチレンテレフタレート（ＰＥＴ）層を積層してもよい。   The layer 86 for ensuring heat-weldability may be a low density polyethylene (LDPE) layer instead of polypropylene (PP). Although not shown, a polyethylene terephthalate (PET) layer may be further laminated on the nylon layer 88 that ensures press formability.

この実施形態では、外装部材８０は、図２に示すように、上述した扁平形状の１枚のフィルム材８１を２つに折り畳み、周縁部８５を溶着させて袋状にしている。なお、外装部材８０は、図示は省略するが、表裏の２枚のフィルム材を合わせて、その周縁部を溶着させて袋状にしてもよい。いずれの場合にも、袋状の外装部材８０の中央部には、上述した電極体１０が収容される収容空間が形成される。   In this embodiment, as shown in FIG. 2, the exterior member 80 is formed into a bag shape by folding the flat film material 81 described above into two and welding the peripheral edge portion 85. Although the illustration of the exterior member 80 is omitted, it may be formed into a bag shape by combining two film materials on the front and back sides and welding the peripheral portions thereof. In any case, an accommodation space in which the above-described electrode body 10 is accommodated is formed in the central portion of the bag-shaped exterior member 80.

正極シート２０と負極シート４０とは、図１および図２に示すように、集電端子３０、５０をそれぞれ反対側に向けて、電極材料２４、４４が塗工された塗工部の位置を合わせて、負極シート４０、正極シート２０、負極シート４０の順で重ねられている。正極シート２０の電極材料２４が塗工された塗工部には、図１に示すように、セパレータ６０が被せられている。負極シート４０は、電極材料４４が塗工された側の面を、正極シート２０に向けて配設されている。正極シート２０に塗工された電極材料２４と負極シート４０に塗工された電極材料４４とは、セパレータ６０によって隔てられている。   As shown in FIGS. 1 and 2, the positive electrode sheet 20 and the negative electrode sheet 40 have the positions of the coated portions where the electrode materials 24 and 44 are coated, with the current collecting terminals 30 and 50 facing away from each other. In addition, the negative electrode sheet 40, the positive electrode sheet 20, and the negative electrode sheet 40 are stacked in this order. As shown in FIG. 1, a separator 60 is put on the coated portion of the positive electrode sheet 20 where the electrode material 24 is coated. The negative electrode sheet 40 is disposed with the surface on which the electrode material 44 is applied facing the positive electrode sheet 20. The electrode material 24 applied to the positive electrode sheet 20 and the electrode material 44 applied to the negative electrode sheet 40 are separated by a separator 60.

このラミネート型電池１００は、かかる電極体１０が外装部材８０に収容されている。この実施形態では、上述したように外装部材８０の収容空間８２に電極体１０が収容されている。さらに外装部材８０の収容空間８２には電解質（図示省略）が注入される。電解質は、この実施形態では、非水電解質で構成されている。かかる非水電解質として、適当な電解質塩（例えばＬｉＰＦ６等のリチウム塩）を適当量含むジエチルカーボネート、エチレンカーボネート等の混合溶媒で構成するとよい。 In this laminate type battery 100, the electrode body 10 is accommodated in an exterior member 80. In this embodiment, the electrode body 10 is accommodated in the accommodation space 82 of the exterior member 80 as described above. Further, an electrolyte (not shown) is injected into the accommodation space 82 of the exterior member 80. In this embodiment, the electrolyte is composed of a non-aqueous electrolyte. Such a non-aqueous electrolyte may be composed of a mixed solvent such as diethyl carbonate and ethylene carbonate containing an appropriate amount of an appropriate electrolyte salt (for example, a lithium salt such as LiPF 6 ).

電極体１０の集電端子３０、５０は、図１に示すように、それぞれフィルム材８１の間から外装部材８０の外に引き出されている。   As shown in FIG. 1, the current collecting terminals 30 and 50 of the electrode body 10 are drawn out of the exterior member 80 from between the film materials 81.

この実施形態では、正極シート２０の集電端子３０は、集電箔２２の表裏に熱可塑性樹脂９１を介在させて、フィルム材８１の間から外装部材８０の外に引き出されている。   In this embodiment, the current collecting terminal 30 of the positive electrode sheet 20 is drawn out of the exterior member 80 from between the film materials 81 with the thermoplastic resin 91 interposed between the front and back surfaces of the current collecting foil 22.

また、２枚の負極シート４０の集電端子５０は、熱可塑性樹脂９２を介在させて重ねられ、さらに熱可塑性樹脂９３を介在させてフィルム材８１の間から外装部材８０の外に引き出されている。   Further, the current collecting terminals 50 of the two negative electrode sheets 40 are overlapped with the thermoplastic resin 92 interposed therebetween, and are further drawn out of the exterior member 80 from between the film materials 81 with the thermoplastic resin 93 interposed therebetween. Yes.

ここで、熱可塑性樹脂９１〜９３には、例えば、ポリプロピレン（ＰＰ）や、低密度ポリエチレン（ＬＤＰＥ）などの熱可塑性樹脂を用いることができる。例えば、上述した外装部材８０の熱溶着性を確保する層８６に用いられる材料と同じ材料で構成するとよい。   Here, as the thermoplastic resins 91 to 93, for example, thermoplastic resins such as polypropylene (PP) and low density polyethylene (LDPE) can be used. For example, it is good to comprise with the same material as the material used for the layer 86 which ensures the heat-weldability of the exterior member 80 mentioned above.

この実施形態では、外装部材８０の収容空間８２の周縁部８５において、フィルム材８１を溶着することによって収容空間８２が閉じられている。また、当該周縁部８５において、フィルム材８１および熱可塑性樹脂９１〜９３を溶着することによって、複数の集電端子３０、５０が外装部材８０に接合されている。   In this embodiment, the accommodation space 82 is closed by welding the film material 81 at the peripheral edge 85 of the accommodation space 82 of the exterior member 80. Further, at the peripheral edge 85, the plurality of current collecting terminals 30 and 50 are joined to the exterior member 80 by welding the film material 81 and the thermoplastic resins 91 to 93.

外装部材８０の周縁部８５を閉じる工程（ヒートシール工程）では、例えば、図４に示すように、外装部材８０の周縁部８５にヒートシール装置（図示省略）の圧接部２０１、２０２を押し当てて、外装部材８０の周縁部８５を閉じた状態で熱を与えて、外装部材８０の熱溶着性のフィルム層であるポリプロピレン層８６を溶融して接合する。   In the step of closing the peripheral portion 85 of the exterior member 80 (heat sealing step), for example, as shown in FIG. 4, the pressure contact portions 201 and 202 of the heat seal device (not shown) are pressed against the peripheral portion 85 of the external member 80. Then, heat is applied with the peripheral edge 85 of the exterior member 80 closed, and the polypropylene layer 86 that is a heat-weldable film layer of the exterior member 80 is melted and joined.

上述した熱可塑性樹脂９１〜９３は、かかるヒートシール工程において溶融させることができる。   The thermoplastic resins 91 to 93 described above can be melted in the heat sealing step.

この実施形態では、正極シート２０の集電端子３０とフィルム材８１との間には、図５に示すように、熱可塑性樹脂９１が介在している。この実施形態では、当該部位において、集電端子３０に熱源２０５、２０６を押し当て、集電端子３０を通して熱可塑性樹脂９１を予め温める（予熱工程）。そして、外装部材８０の周縁部８５を表裏からプレスしつつ、熱を与えて溶着させる。このヒートシール工程によって、フィルム材８１の熱溶着性のフィルム層（ポリプロピレン層８６）と、当該熱可塑性樹脂９１とを溶着させて、集電端子３０を外装部材８０に接合している。   In this embodiment, a thermoplastic resin 91 is interposed between the current collecting terminal 30 of the positive electrode sheet 20 and the film material 81 as shown in FIG. In this embodiment, the heat sources 205 and 206 are pressed against the current collecting terminal 30 in this portion, and the thermoplastic resin 91 is preheated through the current collecting terminal 30 (preheating step). And it heat-welds and welds the peripheral part 85 of the exterior member 80 from the front and back. By this heat sealing step, the heat-weldable film layer (polypropylene layer 86) of the film material 81 and the thermoplastic resin 91 are welded, and the current collecting terminal 30 is joined to the exterior member 80.

また、負極シート４０の集電端子５０が、外装部材８０の周縁部８５を通過する部位には、図６に示すように、２枚の集電端子５０の間に熱可塑性樹脂９２が介在し、当該集電端子５０とフィルム材８１との間に熱可塑性樹脂９３が介在している。この実施形態では、当該部位において、集電端子５０に熱源２０５、２０６を押し当て、集電端子５０を通して熱可塑性樹脂９２、９３を予め温める（予熱工程）。そして、外装部材８０の周縁部８５を表裏からプレスしつつ、熱を与えて溶着させる。このヒートシール工程によって、フィルム材８１の熱溶着性のフィルム層（ポリプロピレン層８６）と、当該熱可塑性樹脂９１、９２を溶着させて、集電端子５０を外装部材８０に接合している。   Further, at a portion where the current collecting terminal 50 of the negative electrode sheet 40 passes through the peripheral edge 85 of the exterior member 80, a thermoplastic resin 92 is interposed between the two current collecting terminals 50 as shown in FIG. The thermoplastic resin 93 is interposed between the current collecting terminal 50 and the film material 81. In this embodiment, the heat sources 205 and 206 are pressed against the current collecting terminal 50 in this portion, and the thermoplastic resins 92 and 93 are preheated through the current collecting terminal 50 (preheating step). And it heat-welds and welds the peripheral part 85 of the exterior member 80 from the front and back. By this heat sealing process, the heat-weldable film layer (polypropylene layer 86) of the film material 81 and the thermoplastic resins 91 and 92 are welded to join the current collecting terminal 50 to the exterior member 80.

このように、集電端子５０を通して熱可塑性樹脂９２、９３を予め温めている方法によれば、特に、図６に示すように、熱可塑性樹脂９２、９３が予め温めているので、２枚の集電端子５０の間に介在した熱可塑性樹脂９２を確実に溶着させることができる。また、外装部材８０の周縁部８５を閉じるヒートシール工程において、集電端子３０、５０を外装部材８０に接合することができるので、製造工程もそれほど複雑にならない。   As described above, according to the method in which the thermoplastic resins 92 and 93 are preheated through the current collecting terminal 50, since the thermoplastic resins 92 and 93 are preheated in particular, as shown in FIG. The thermoplastic resin 92 interposed between the current collecting terminals 50 can be surely welded. Further, in the heat sealing process of closing the peripheral edge 85 of the exterior member 80, the current collecting terminals 30 and 50 can be joined to the exterior member 80, so that the manufacturing process is not so complicated.

この実施形態では、集電端子５０が２枚重ねられ、熱可塑性樹脂９２はその間に介在しているが、集電端子５０がそれぞれ熱可塑性樹脂９２を介在させて複数枚重ねられている場合には、周縁部８５が厚くなる。このため、中間部に積層された熱可塑性樹脂９２には熱が届き難いが、このように集電端子５０を通して熱可塑性樹脂９２を予熱すれば、ヒートシール工程で熱可塑性樹脂９２を確実に溶着させることができる。なお、集電端子５０に熱を与える方法については、熱源を押し当てるのに代えて、電磁誘導で集電端子に渦電流を発生させて発熱させてもよい。   In this embodiment, two current collecting terminals 50 are stacked and the thermoplastic resin 92 is interposed therebetween, but when a plurality of current collecting terminals 50 are stacked with the thermoplastic resin 92 interposed therebetween, respectively. The peripheral edge portion 85 becomes thick. For this reason, although it is difficult for heat to reach the thermoplastic resin 92 laminated in the intermediate portion, if the thermoplastic resin 92 is preheated through the current collecting terminal 50 in this way, the thermoplastic resin 92 is surely welded in the heat sealing process. Can be made. In addition, about the method of giving heat to the current collection terminal 50, instead of pressing a heat source, an eddy current may be generated in the current collection terminal by electromagnetic induction to generate heat.

このラミネート型電池１００は、上述したように、複数の集電端子３０、５０のうち、負極シート４０の２つの集電端子５０は、図６に示すように、熱可塑性樹脂９２を介在させて重ねられた状態でフィルム材８１の間から外装部材８０の外に引き出されている。そして、収容空間８２の周縁部８５において、フィルム材８１および熱可塑性樹脂９２、９３を溶着することによって、周縁部８５が閉じられているとともに、当該集電端子５０が外装部材８０に接合されている。   As described above, in the laminate type battery 100, the two current collecting terminals 50 of the negative electrode sheet 40 among the plurality of current collecting terminals 30 and 50 have a thermoplastic resin 92 interposed therebetween as shown in FIG. In an overlapped state, the film material 81 is pulled out of the exterior member 80. The peripheral edge 85 is closed by welding the film material 81 and the thermoplastic resins 92 and 93 at the peripheral edge 85 of the accommodating space 82, and the current collecting terminal 50 is joined to the exterior member 80. Yes.

このため、収容空間８２の周縁部８５の同じ位置から複数の集電端子５０を引き出すことができる。従って、ラミネート型電池１００は、図１に示すように、全体としても、より多くの集電端子３０、５０を外装部材８０から引き出すことが可能である。外装部材８０内で生じた熱は、これらの外装部材８０から引き出された集電端子３０、５０から効率よく放熱されるので、このラミネート型電池１００は放熱性能が良い。   For this reason, a plurality of current collecting terminals 50 can be pulled out from the same position of the peripheral edge portion 85 of the accommodation space 82. Therefore, as shown in FIG. 1, the laminate type battery 100 can draw more current collecting terminals 30 and 50 from the exterior member 80 as a whole. Since the heat generated in the exterior member 80 is efficiently radiated from the current collecting terminals 30 and 50 drawn from these exterior members 80, the laminate type battery 100 has good heat dissipation performance.

特に、この実施形態では、全ての電極シート２０、４０の集電端子３０、５０（集電箔２２、４２の一部）が、外装部材８０の外に出ており、外装部材８０内で生じた熱が、当該集電端子３０、５０を伝わって外装部材８０の外に放熱されやすく放熱性能がよい。   In particular, in this embodiment, the current collecting terminals 30 and 50 (a part of the current collecting foils 22 and 42) of all the electrode sheets 20 and 40 are out of the exterior member 80 and are generated in the exterior member 80. Heat is easily radiated to the outside of the exterior member 80 through the current collecting terminals 30 and 50, and the heat dissipation performance is good.

また、上述した実施形態では、熱可塑性樹脂９２を介在させて重ねられた集電端子は、極性が同じ電極の集電端子（この実施形態では、負極シート４０の集電端子５０）である。この実施形態では、当該集電端子５０は外装部材８０の外で接合してもよい。この場合、集電端子５０は外装部材８０の外で接合しても、外装部材８０の周縁部８５が閉じられているので、当該接合プロセスによって発生する散りが外装部材８０の収容空間８２に入ることはない。このため、当該接合プロセスによって発生する散りが収容空間８２に入ることに起因して電池の性能が劣化することがない。このように当該接合プロセスによって発生する散りが収容空間８２に入り難いので、当該接合プロセスには、例えば、溶接を用いることができる。   In the above-described embodiment, the current collecting terminals stacked with the thermoplastic resin 92 interposed therebetween are the current collecting terminals having the same polarity (in this embodiment, the current collecting terminals 50 of the negative electrode sheet 40). In this embodiment, the current collecting terminal 50 may be joined outside the exterior member 80. In this case, even if the current collecting terminal 50 is joined outside the exterior member 80, the peripheral edge 85 of the exterior member 80 is closed, so that scattering generated by the joining process enters the accommodation space 82 of the exterior member 80. There is nothing. For this reason, the performance of the battery does not deteriorate due to the scattering generated by the joining process entering the accommodation space 82. Thus, since the scattering generated by the joining process is difficult to enter the accommodation space 82, for example, welding can be used for the joining process.

以上、本発明の一実施形態に係るラミネート型電池を説明したが、本発明に係るラミネート型電池は、かかる形態に限定されない。以下に、本発明の他の実施形態を説明する。なお、各電極シートの構造など、具体的な構造は、公知の技術を基に、適宜、変更するとよく、上述した実施形態に限定されない。   The laminated battery according to one embodiment of the present invention has been described above, but the laminated battery according to the present invention is not limited to such a form. Hereinafter, another embodiment of the present invention will be described. In addition, specific structures, such as the structure of each electrode sheet | seat, should just be changed suitably based on a well-known technique, and are not limited to embodiment mentioned above.

例えば、電極体１０は、正極シート２０と負極シート４０をより多く積層した積層電極体を用いることができる。この場合、上述した実施形態と同様に、複数の集電端子は、熱可塑性樹脂を介在させて重ねた状態で、フィルム材の間から外装部材の外に引き出すとよい。これにより、より多くの集電端子を外装部材の外に出すことができる。この場合、概ね外装部材の外に出る集電端子の数に比例した放熱効果を得ることができる。   For example, the electrode body 10 can be a laminated electrode body in which a larger number of positive electrode sheets 20 and negative electrode sheets 40 are stacked. In this case, similarly to the above-described embodiment, the plurality of current collecting terminals may be drawn out of the exterior member from between the film materials in a state of being stacked with the thermoplastic resin interposed. Thereby, more current collection terminals can be taken out of an exterior member. In this case, it is possible to obtain a heat dissipation effect that is substantially proportional to the number of current collecting terminals that go out of the exterior member.

また、例えば、図７に示すように、極性が同じ電極の複数の集電端子５０を纏めた部位に１つの集電端子５１を溶接し、当該集電端子５１をフィルム材８１の間から外装部材８０の外に引き出すことができる。このように、複数の電極シート４０の集電端子５０を纏めた部位に電極端子５１を溶接する場合、集電端子５０を纏めるのに必要な長さＡが長くなり、集電端子５０に所要の長さが必要になる。また、多くの集電端子５０を纏めて溶接するので、溶接に必要なエネルギも大きくなる。このような溶接では、スパッタ（散り）が発生しやすい。   In addition, for example, as shown in FIG. 7, one current collecting terminal 51 is welded to a portion where a plurality of current collecting terminals 50 of the same polarity are gathered, and the current collecting terminal 51 is covered from between the film materials 81. The member 80 can be pulled out. As described above, when the electrode terminals 51 are welded to the portions where the current collecting terminals 50 of the plurality of electrode sheets 40 are collected, the length A necessary for collecting the current collecting terminals 50 becomes longer, and the current collecting terminals 50 are required. The length of is required. Moreover, since many current collection terminals 50 are welded collectively, the energy required for welding also becomes large. In such welding, spatter (scattering) is likely to occur.

これに対して、本発明によれば、例えば、図８に示すように、電極体１０の複数の集電端子５０を、小分けにし、それぞれに集電端子５１を取り付けるとよい。図８に示すラミネート型電池１００Ａは、複数の集電端子５１が、熱可塑性樹脂９２を介在させて重ねられた状態で、フィルム材８１の間から外装部材８０の外に引き出されている。そして、電極体１０が収容される収容空間８２の周縁部８５において、フィルム材８１および熱可塑性樹脂９２を溶着することによって、周縁部８５を閉じるとともに集電端子５１を外装部材８０に接合している。   On the other hand, according to the present invention, for example, as shown in FIG. The laminated battery 100A shown in FIG. 8 is drawn out of the exterior member 80 from between the film materials 81 in a state where a plurality of current collecting terminals 51 are stacked with a thermoplastic resin 92 interposed therebetween. And in the peripheral part 85 of the accommodation space 82 in which the electrode body 10 is accommodated, the film material 81 and the thermoplastic resin 92 are welded to close the peripheral part 85 and join the current collecting terminal 51 to the exterior member 80. Yes.

このラミネート型電池１００Ａは、極性が同じ複数の集電端子５０を小分けにし、それぞれに集電端子５１を取り付けているので、図７に示す形態に比べて、外装部材８０の外に出る電極端子５１の数を増やすことができる。このため、外装部材８０内で発生した熱の放熱効率が良い。また、複数の集電端子５０を小分けに纏めるので、纏めるのに必要な長さＡが短くてよく、その分だけ電池を小さくすることができる。また、纏められる集電端子５０の数が小さいので、溶接に必要なエネルギも小さくてよく、スパッタ（散り）の発生も少なく抑えることができる。   In this laminate type battery 100A, a plurality of current collecting terminals 50 having the same polarity are divided into small portions, and the current collecting terminals 51 are attached to each of them, so that the electrode terminals that go out of the exterior member 80 as compared with the embodiment shown in FIG. The number of 51 can be increased. For this reason, the heat dissipation efficiency of the heat generated in the exterior member 80 is good. Further, since the plurality of current collecting terminals 50 are grouped into small portions, the length A required for grouping may be short, and the battery can be made smaller by that amount. In addition, since the number of current collecting terminals 50 to be collected is small, the energy required for welding may be small, and the occurrence of spatter (scattering) can be suppressed to a low level.

また、図８に示すように、本発明によれば、複数の集電端子５１が、熱可塑性樹脂９２を介在させて重ねられた状態で、フィルム材８１の間から外装部材８０の外に引き出されていればよい。この実施形態では、フィルム材８１の熱溶着性のフィルム層（図示省略）を溶着させることによって、集電端子５１を外装部材８０に接合させることができる。このようにフィルム材８１の熱溶着性のフィルム層（図示省略）によって、集電端子５１を外装部材８０に接合させることが確保できれば、図１に示すように集電端子５１とフィルム材８１との間に、別途熱可塑性樹脂（９１，９３）を介在させる必要は必ずしもない。   Further, as shown in FIG. 8, according to the present invention, a plurality of current collecting terminals 51 are drawn out of the exterior member 80 from between the film materials 81 in a state where they are stacked with the thermoplastic resin 92 interposed therebetween. It only has to be done. In this embodiment, the current collecting terminal 51 can be joined to the exterior member 80 by welding a heat-weldable film layer (not shown) of the film material 81. If it is ensured that the current collecting terminal 51 is bonded to the exterior member 80 by the heat-weldable film layer (not shown) of the film material 81 in this way, the current collecting terminal 51 and the film material 81 as shown in FIG. It is not always necessary to interpose a thermoplastic resin (91, 93) separately.

さらに、本発明の他の実施形態を説明する。   Furthermore, another embodiment of the present invention will be described.

本発明では、熱可塑性樹脂を介在させて重ねられた集電端子は、極性が異なる電極の集電端子でもよい。例えば、図９に示すラミネート型電池１００Ｂは、極性が異なる正負の電極シート２０、４０の集電端子３０、５０が、熱可塑性樹脂９２を介在させて重ねられている。さらに集電端子３０、５０とフィルム材８１との間に熱可塑性樹脂９３を介在させた状態で、フィルム材８１の間から外装部材８０の外に引き出されている。この実施形態では、正負の電極シート２０、４０の間には、セパレータ６１が配設されている。   In the present invention, the current collecting terminals stacked with the thermoplastic resin interposed may be current collecting terminals of electrodes having different polarities. For example, in a laminate type battery 100B shown in FIG. 9, current collecting terminals 30 and 50 of positive and negative electrode sheets 20 and 40 having different polarities are stacked with a thermoplastic resin 92 interposed therebetween. In addition, the thermoplastic resin 93 is interposed between the current collecting terminals 30 and 50 and the film material 81, and is drawn out of the exterior member 80 from between the film materials 81. In this embodiment, a separator 61 is disposed between the positive and negative electrode sheets 20 and 40.

そして、外装部材８０の収容空間８２の周縁部８５において、フィルム材８１および熱可塑性樹脂９２、９３を溶着することによって、集電端子３０、５０が外装部材８０に接合されている。この実施形態では、熱可塑性樹脂９２には、絶縁性を有する熱可塑性樹脂を用い、集電端子３０、５０の間の短絡を防止している。   The current collecting terminals 30 and 50 are joined to the exterior member 80 by welding the film material 81 and the thermoplastic resins 92 and 93 at the peripheral edge 85 of the accommodation space 82 of the exterior member 80. In this embodiment, an insulating thermoplastic resin is used as the thermoplastic resin 92 to prevent a short circuit between the current collecting terminals 30 and 50.

かかるラミネート型電池１００Ｂによれば、極性が異なる電極シート２０、４０の集電端子３０、５０を近い位置に配設することができる。このため、集電端子３０、５０間の電気伝導経路を短くすることができ、両者間の抵抗値を低減させることができる。また、極性が異なる電極シート２０、４０の集電端子３０、５０を近い位置に配設することができるので、ラミネート型電池１００Ｂ及びその周辺構造について、省スペース化を図ることができる。   According to the laminated battery 100B, the current collecting terminals 30 and 50 of the electrode sheets 20 and 40 having different polarities can be disposed at close positions. For this reason, the electrical conduction path between the current collecting terminals 30 and 50 can be shortened, and the resistance value between both can be reduced. In addition, since the current collecting terminals 30 and 50 of the electrode sheets 20 and 40 having different polarities can be disposed at close positions, space can be saved for the laminated battery 100B and its peripheral structure.

さらに、本発明の他の実施形態を説明する。   Furthermore, another embodiment of the present invention will be described.

本発明では、電極には、正と負の両極性を持つ電極（いわゆるバイポーラ型電極）を採用することができる。例えば、図１０に示すラミネート型電池１００Ｃは、シート状の複数のバイポーラ型電極７０が積層された電極体１０を備えている。この実施形態では、外装部材８０内では、バイポーラ型電極７０は、それぞれセパレータ６１を介在させて隔てて配設されている。各バイポーラ型電極７０の集電端子７１は、熱可塑性樹脂９２を介在させて重ねられており、さらに集電端子７１とフィルム材８１との間に熱可塑性樹脂９３を介在させた状態で、フィルム材８１の間から外装部材８０の外に引き出されている。そして、電極体１０が収容されている収容空間８２の周縁部８５において、フィルム材８１を溶着することによって収容空間８２が閉じられているとともに、フィルム材８１および熱可塑性樹脂９２、９３を溶着することによって、複数の集電端子７１が外装部材８０に接合されている。   In the present invention, an electrode having both positive and negative polarities (so-called bipolar electrode) can be adopted as the electrode. For example, a laminated battery 100C shown in FIG. 10 includes an electrode body 10 in which a plurality of sheet-like bipolar electrodes 70 are stacked. In this embodiment, in the exterior member 80, the bipolar electrodes 70 are disposed with a separator 61 interposed therebetween. The collector terminal 71 of each bipolar electrode 70 is overlapped with a thermoplastic resin 92 interposed therebetween, and the film is further formed with a thermoplastic resin 93 interposed between the collector terminal 71 and the film material 81. It is pulled out of the exterior member 80 from between the materials 81. And in the peripheral part 85 of the accommodation space 82 in which the electrode body 10 is accommodated, the accommodation space 82 is closed by welding the film material 81, and the film material 81 and the thermoplastic resins 92 and 93 are welded. Thus, the plurality of current collecting terminals 71 are joined to the exterior member 80.

このように構成されたラミネート型電池１００Ｃ（バイポーラ型電池）では、例えば、図１０に示すように、接続する集電端子７１から出力される電圧が異なり、使用用途に応じて適当な電圧（Ｖ１、Ｖ２、Ｖ３）を取り出すことができる。なお、バイポーラ型電極７０については、公知であり、その説明は省略するが、本発明では、種々の形態のバイポーラ型電極７０で採用することができる。   In the laminated battery 100C (bipolar battery) configured as described above, for example, as shown in FIG. 10, the voltage output from the current collecting terminal 71 to be connected is different, and an appropriate voltage (V1) is used according to the intended use. , V2, V3) can be taken out. The bipolar electrode 70 is publicly known, and the description thereof is omitted. However, in the present invention, the bipolar electrode 70 can be employed in various forms.

以上、本発明の一実施形態に係るラミネート型電池について種々の形態を例示したが、本発明に係るラミネート型電池１００は上述した実施形態に限定されない。   As mentioned above, although various forms were illustrated about the laminated battery which concerns on one Embodiment of this invention, the laminated battery 100 which concerns on this invention is not limited to embodiment mentioned above.

電池の構造としては、リチウムイオン二次電池やバイポーラ型電池を例示したが、本発明は種々の電池に適用できる。ラミネート型電池において、外装部材の周縁部から電極シートの集電端子を出す部位の構造について、例えば、ニッケル水素電池、ニッケルカドミウム電池などへも適用が可能である。ニッケル水素電池、ニッケルカドミウム電池を構成する電極シートの構造については、種々の公知の構造を採用することができる。   Examples of the battery structure include lithium ion secondary batteries and bipolar batteries, but the present invention can be applied to various batteries. In the laminate type battery, the structure of the portion where the current collecting terminal of the electrode sheet is taken out from the peripheral portion of the exterior member can be applied to, for example, a nickel hydrogen battery, a nickel cadmium battery, and the like. Various known structures can be adopted as the structure of the electrode sheet constituting the nickel metal hydride battery or the nickel cadmium battery.

また、本発明にかかるラミネート型電池は、組電池を構成することができる。また、本発明に係るラミネート型電池は、外装部材の封止構造に優れ、電池の性能劣化防止および長寿命化を図ることができる。そして、かかる組電池は、例えば、図１１に模式的に示すように、自動車等の車両１に搭載されるモーター（電動機）用の電池１０００として好適に使用できる。具体的に一例を挙げれば、ハイブリッド自動車、電気自動車、燃料電池自動車のような電動機を備える自動車の電源（二次電池）として適用できる。   The laminate type battery according to the present invention can constitute an assembled battery. In addition, the laminate type battery according to the present invention is excellent in the sealing structure of the exterior member, and can prevent battery performance deterioration and extend the life. And this assembled battery can be conveniently used as the battery 1000 for motors (electric motors) mounted in vehicles 1, such as a car, for example, as typically shown in FIG. If an example is given concretely, it can apply as a power supply (secondary battery) of a car provided with an electric motor like a hybrid car, an electric car, and a fuel cell car.

本発明の一実施形態に係るラミネート型電池の断面図。1 is a cross-sectional view of a laminated battery according to an embodiment of the present invention. 本発明の一実施形態に係るラミネート型電池の平面図。1 is a plan view of a laminated battery according to an embodiment of the present invention. 本発明の一実施形態に係るラミネート型電池の外装部材の構造を示す断面図。Sectional drawing which shows the structure of the exterior member of the laminate type battery which concerns on one Embodiment of this invention. 本発明の一実施形態に係るラミネート型電池の外装部材を閉じるヒートシール工程を示す断面図。Sectional drawing which shows the heat seal process which closes the exterior member of the laminate type battery which concerns on one Embodiment of this invention. 本発明の一実施形態に係るラミネート型電池の外装部材を閉じるヒートシール工程を示す断面図。Sectional drawing which shows the heat seal process which closes the exterior member of the laminate type battery which concerns on one Embodiment of this invention. 本発明の一実施形態に係るラミネート型電池の外装部材を閉じるヒートシール工程を示す断面図。Sectional drawing which shows the heat seal process which closes the exterior member of the laminate type battery which concerns on one Embodiment of this invention. 比較例におけるラミネート型電池の構造を示す断面図。Sectional drawing which shows the structure of the laminate type battery in a comparative example. 本発明の他の実施形態に係るラミネート型電池の構造を示す断面図。Sectional drawing which shows the structure of the laminated battery which concerns on other embodiment of this invention. 本発明の他の実施形態に係るラミネート型電池の構造を示す断面図。Sectional drawing which shows the structure of the laminated battery which concerns on other embodiment of this invention. 本発明の他の実施形態に係るラミネート型電池の構造を示す断面図。Sectional drawing which shows the structure of the laminated battery which concerns on other embodiment of this invention. 本発明のラミネート型電池を用いた組電池を電源として搭載した車両を示す図。The figure which shows the vehicle carrying the assembled battery using the laminate type battery of this invention as a power supply.

符号の説明Explanation of symbols

１ 車両
１０ 電極体（積層電極体）
２０ 正極シート(電極シート)
２２ 集電箔（集電体）
２４ 電極材料（正極活物質）
３０ 集電端子
４０ 負極シート(電極シート)
４２ 集電箔（集電体）
４４ 電極材料（負極活物質）
５０ 集電端子
５１ 集電端子
６０、６１ セパレータ
７０ バイポーラ型電極（電極シート）
７１ 集電端子
８０ 外装部材
８５ 周縁部
９１、９２ 熱可塑性樹脂
１００ ラミネート型電池
１００Ａ ラミネート型電池
１００Ｂ ラミネート型電池
１００Ｃ ラミネート型電池
２０１、２０２ 圧接部
２０５、２０６ 熱源 1 Vehicle 10 Electrode Body (Laminated Electrode Body)
20 Positive electrode sheet (electrode sheet)
22 Current collector foil (current collector)
24 Electrode material (positive electrode active material)
30 Current collecting terminal 40 Negative electrode sheet (electrode sheet)
42 Current collector foil (current collector)
44 Electrode material (negative electrode active material)
50 Current collecting terminal 51 Current collecting terminal 60, 61 Separator 70 Bipolar electrode (electrode sheet)
71 Current collecting terminal 80 Exterior member 85 Peripheral part 91, 92 Thermoplastic resin 100 Laminated battery 100A Laminated battery 100B Laminated battery 100C Laminated battery 201, 202 Pressure contact part 205, 206 Heat source

Claims (7)

電極体を外装部材に収容したラミネート型電池であって、
前記外装部材は、フィルム材を重ね合わせることによって、前記電極体を収容する収容空間が形成されており、
前記電極体は、熱可塑性樹脂を介在させて重ねられた状態で前記フィルム材の間から前記外装部材の外に引き出された複数の集電端子を有し、
前記収容空間の周縁部において、前記フィルム材および熱可塑性樹脂を溶着することによって、前記周縁部が閉じられているとともに、前記複数の集電端子が前記外装部材に接合されている、ラミネート型電池。 A laminated battery in which an electrode body is housed in an exterior member,
The exterior member has an accommodation space for accommodating the electrode body by overlapping film materials,
The electrode body has a plurality of current collecting terminals drawn out of the exterior member from between the film materials in a state of being overlapped with a thermoplastic resin interposed therebetween,
A laminated battery in which the peripheral portion is closed by welding the film material and the thermoplastic resin at the peripheral portion of the housing space, and the current collecting terminals are joined to the exterior member. . 前記電極体に正負の極性を有する電極が含まれており、前記複数の集電端子は、前記極性が同じ電極の集電端子である、請求項１に記載のラミネート型電池。   The laminate-type battery according to claim 1, wherein the electrode body includes electrodes having positive and negative polarities, and the plurality of current collecting terminals are current collecting terminals having the same polarity. 前記複数の集電端子は、前記外装部材の外で接合されている、請求項２に記載のラミネート型電池。   The laminated battery according to claim 2, wherein the plurality of current collecting terminals are joined outside the exterior member. 前記電極体に正負の極性を有する電極が含まれており、前記複数の集電端子は、前記極性が異なる電極の集電端子である、請求項１に記載のラミネート型電池。   The laminate type battery according to claim 1, wherein the electrode body includes electrodes having positive and negative polarities, and the plurality of current collecting terminals are current collecting terminals of electrodes having different polarities. 前記電極体は、複数のバイポーラ型電極が含まれている、請求項１に記載のラミネート型電池。   The laminate type battery according to claim 1, wherein the electrode body includes a plurality of bipolar electrodes. 請求項１から５の何れかに記載の電池が複数個組み合わされた組電池。   An assembled battery in which a plurality of the batteries according to claim 1 are combined. 請求項６に記載の組電池が電源として搭載された車両。   A vehicle on which the assembled battery according to claim 6 is mounted as a power source.
JP2008122294A 2008-05-08 2008-05-08 Laminated battery, battery pack, and vehicle Pending JP2009272161A (en)

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