JP6573644B2 - Electricity storage device - Google Patents

Electricity storage device Download PDF

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JP6573644B2
JP6573644B2 JP2017067023A JP2017067023A JP6573644B2 JP 6573644 B2 JP6573644 B2 JP 6573644B2 JP 2017067023 A JP2017067023 A JP 2017067023A JP 2017067023 A JP2017067023 A JP 2017067023A JP 6573644 B2 JP6573644 B2 JP 6573644B2
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negative electrode
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storage device
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JP2018170180A (en
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俊介 天貝
俊介 天貝
太田　貴志
貴志 太田
寺田　一郎
一郎 寺田
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Mercedes Benz Group AG
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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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Description

本発明は、蓄電デバイスに関する。   The present invention relates to an electricity storage device.

近年、環境問題等を考慮して、モータのみで走行可能な電気自動車や、エンジンとモータとを駆動源とするハイブリッド電気自動車等の電動車両の開発が進んでいる。このような電動車両には、航続距離の観点から、比較的軽量でエネルギー密度が高い車載用バッテリが求められる。例えば特許文献１には、比較的軽量な蓄電デバイスとして、２枚のラミネートフィルムで電池要素を挟み込むように収容する所謂パウチ型のバッテリセルを積層した蓄電デバイスが開示されている。また、例えば特許文献２には、比較的エネルギー密度が高い車載用バッテリとして、捲回電極体を含む電池要素を箱状の電池ケースに収容する所謂角型（プリズマティック）の蓄電デバイスが開示されている。   In recent years, taking into consideration environmental problems and the like, development of electric vehicles such as an electric vehicle that can run only by a motor and a hybrid electric vehicle that uses an engine and a motor as drive sources has been progressing. Such an electric vehicle is required to have a battery that is relatively light and has high energy density from the viewpoint of cruising distance. For example, Patent Document 1 discloses a power storage device in which so-called pouch-type battery cells are stacked so that a battery element is sandwiched between two laminated films as a relatively light power storage device. Further, for example, Patent Document 2 discloses a so-called prismatic power storage device in which a battery element including a wound electrode body is accommodated in a box-shaped battery case as a vehicle battery having a relatively high energy density. ing.

特許文献１の従来技術は、より詳しくは、電池要素を２枚の長方形のラミネートフィルムで挟み、電池要素の周囲において、互いのラミネートフィルムを融着させてバッテリセルを形成している。また、特許文献１の従来技術は、積層された複数の当該バッテリセルを柱部材により一体化して蓄電デバイスを構成している。そして、当該蓄電デバイスは、長方形の各バッテリセルの互いに対向する短辺のほぼ中央部において、２枚のラミネートフィルムの間から正極端子又は負極端子がそれぞれ導出され、これらの端子を介して充放電を行われる。   More specifically, in the prior art of Patent Document 1, a battery element is sandwiched between two rectangular laminate films, and a battery cell is formed by fusing the respective laminate films around the battery element. In the prior art of Patent Document 1, a plurality of stacked battery cells are integrated by a pillar member to constitute an electricity storage device. Then, in the electric storage device, a positive electrode terminal or a negative electrode terminal is led out from between the two laminate films at the substantially central portion of the short sides of each rectangular battery cell facing each other, and charging / discharging is performed via these terminals. Done.

一方、特許文献２の従来技術は、より詳しくは、扁平状に捲回された電極体が箱状の電池ケースに収容され、正極端子及び負極端子が形成された蓋体によって開口を塞ぐように構成されている。また、特許文献２の従来技術は、電極体を構成する正極及び負極がそれぞれ集電板を介して正極端子及び負極端子に接続されている。   On the other hand, in the prior art of Patent Document 2, more specifically, the flatly wound electrode body is accommodated in a box-shaped battery case, and the opening is closed by the lid body on which the positive electrode terminal and the negative electrode terminal are formed. It is configured. In the prior art of Patent Document 2, the positive electrode and the negative electrode constituting the electrode body are connected to the positive electrode terminal and the negative electrode terminal via current collector plates, respectively.

特開２００８−２６９９２６号公報JP 2008-269926 A 特開２０１６−９１７８７号公報Japanese Patent Laid-Open No. 2006-91787

しかしながら、上記のような蓄電デバイスは、充放電に係る電流が正極端子及び負極端子に集中して流れるため、正極端子及び負極端子の近傍領域において当該電流の二乗に比例して局所的に発熱することになる。このため、電極体は、端子近傍の領域とその他の領域とで不均一に劣化してしまう虞が生じる。また、上記のような蓄電デバイスは、端子近傍で充放電反応が促進されることから、端子近傍において発熱領域が形成され、電極体の中でも端子近傍の局所領域において膨張・収縮が顕著に起こってしまう。これにより、蓄電デバイスは、パウチ型であるか角型であるかを問わず、電極体が局所的に膨張したときの電極体の最大の厚み部分を考慮して外装体の厚みが設計されることから、エネルギー密度を向上させるための小型化が妨げられる虞が生じる。   However, since the current related to charging / discharging concentrates on the positive electrode terminal and the negative electrode terminal, the electricity storage device as described above generates heat locally in the vicinity of the positive electrode terminal and the negative electrode terminal in proportion to the square of the current. It will be. For this reason, there exists a possibility that an electrode body may deteriorate nonuniformly in the area | region of a terminal vicinity, and another area | region. In addition, since the charge / discharge reaction is accelerated in the vicinity of the terminal in the electricity storage device as described above, a heat generation region is formed in the vicinity of the terminal, and expansion / contraction occurs remarkably in a local region in the vicinity of the terminal among the electrode bodies. End up. Thereby, regardless of whether the power storage device is a pouch type or a square type, the thickness of the exterior body is designed in consideration of the maximum thickness portion of the electrode body when the electrode body is locally expanded. For this reason, there is a possibility that miniaturization for improving the energy density is hindered.

本発明は、このような状況に鑑みてなされたものであり、その目的とするところは、バッテリの不均一な劣化を抑制しつつ、エネルギー密度の向上に寄与する蓄電デバイスを提供することにある。   This invention is made | formed in view of such a condition, The place made into the objective is to provide the electrical storage device which contributes to the improvement of an energy density, suppressing the non-uniform deterioration of a battery. .

＜本発明の第１の態様＞
本発明の第１の態様は、正極部及び負極部がセパレータを介して対向し、前記正極部、前記負極部、及び前記セパレータの周囲に電解質が設けられた構造を有する電池要素と、前記電池要素を収容する外装体と、前記外装体の前記電池要素を覆う領域において形成され、一端が前記正極部に電気的に接続されると共に、他端が前記外装体の外部に露出する正極端子と、前記外装体の前記電池要素を覆う領域において形成され、一端が前記負極部に電気的に接続されると共に、他端が前記外装体の外部に露出する負極端子と、を備え、前記正極端子及び前記負極端子は、それぞれ複数設けられる蓄電デバイスである。 <First Aspect of the Present Invention>
According to a first aspect of the present invention, there is provided a battery element having a structure in which a positive electrode part and a negative electrode part are opposed to each other with a separator, and an electrolyte is provided around the positive electrode part, the negative electrode part, and the separator; An exterior body that houses an element; and a positive electrode terminal that is formed in a region of the exterior body that covers the battery element, one end of which is electrically connected to the positive electrode portion, and the other end is exposed to the outside of the exterior body. A positive electrode terminal that is formed in a region of the outer package covering the battery element, and has one end electrically connected to the negative electrode portion and the other end exposed to the outside of the outer package. And the said negative electrode terminal is an electrical storage device provided with two or more, respectively.

これにより本発明の第１の態様によれば、蓄電デバイスの充放電において蓄電デバイスの外部と電池要素との間に流れる電流が、複数の正極端子及び複数の負極端子に分散され、また複数化により蓄電デバイス内部と正負極端子との間の溶接抵抗が小さくなるため、個々の端子近傍における局所的な発熱と膨張とが緩和されることになる。従って、本発明の第１の態様によれば、バッテリの不均一な劣化を抑制しつつ、エネルギー密度の向上に寄与する蓄電デバイスを提供することができる。   Thus, according to the first aspect of the present invention, the current flowing between the outside of the electricity storage device and the battery element in charge / discharge of the electricity storage device is distributed to the plurality of positive electrode terminals and the plurality of negative electrode terminals, and is also pluralized. As a result, the welding resistance between the inside of the electricity storage device and the positive and negative terminals is reduced, so that local heat generation and expansion in the vicinity of the individual terminals are alleviated. Therefore, according to the 1st aspect of this invention, the electrical storage device which contributes to the improvement of an energy density can be provided, suppressing the non-uniform deterioration of a battery.

＜本発明の第２の態様＞
本発明の第２の態様は、上記した本発明の第１の態様において、前記外装体は、２枚のラミネートフィルムを張り合わせてなるパウチ型である蓄電デバイスである。これにより、本発明の第２の態様によれば、とりわけ熱膨張の影響が顕著に表れるパウチ型のバッテリに適用されることで、上記した第１の態様と同様の作用効果をより効果的に奏することができる。 <Second Aspect of the Present Invention>
According to a second aspect of the present invention, in the first aspect of the present invention described above, the exterior body is a pouch-type power storage device in which two laminate films are bonded together. Thus, according to the second aspect of the present invention, the same effects as those of the first aspect described above can be effectively achieved by applying the present invention to a pouch-type battery in which the influence of thermal expansion is particularly significant. Can play.

＜本発明の第３の態様＞
本発明の第３の態様は、上記した本発明の第２の態様において、前記電池要素は、前記正極部を構成する複数の正極集電体と、前記負極部を構成する複数の負極集電体とが前記セパレータを介して交互に積層された構造を有し、複数の前記正極端子は、前記正極集電体の互いに異なる位置に形成された複数の正極接続部のいずれかに電気的に接続され、複数の前記負極端子は、前記負極集電体の互いに異なる位置に形成された複数の負極接続部のいずれかに電気的に接続される。蓄電デバイスである。 <Third Aspect of the Present Invention>
According to a third aspect of the present invention, in the second aspect of the present invention described above, the battery element includes a plurality of positive electrode current collectors constituting the positive electrode part and a plurality of negative electrode current collectors constituting the negative electrode part. And a plurality of the positive terminals are electrically connected to any one of the plurality of positive electrode connecting portions formed at different positions of the positive electrode current collector. The plurality of negative electrode terminals connected to each other are electrically connected to any one of a plurality of negative electrode connection portions formed at different positions of the negative electrode current collector. It is an electricity storage device.

これにより本発明の第３の態様によれば、蓄電デバイスの充放電において、各正極集電体及び各負極集電体は、互いに異なる位置に形成された複数の正極接続部及び複数の負極接続部に分散して電流を授受することができる。そのため、各正極集電体及び各負極集電体の領域ごとの発熱及び膨張を分散して緩和することができるため、上記した第１の態様と同様の作用効果をより効果的に奏することができる。   Thus, according to the third aspect of the present invention, in charging / discharging of the electricity storage device, each positive electrode current collector and each negative electrode current collector have a plurality of positive electrode connection portions and a plurality of negative electrode connections formed at different positions. The current can be exchanged in parts. Therefore, since heat generation and expansion for each region of each positive electrode current collector and each negative electrode current collector can be dispersed and alleviated, the same effect as the first aspect described above can be achieved more effectively. it can.

＜本発明の第４の態様＞
本発明の第４の態様は、上記した本発明の第３の態様において、複数の前記正極接続部は、それぞれ前記正極集電体の両端に形成され、複数の前記負極接続部は、それぞれ前記負極集電体の両端に形成される請求項３に記載の蓄電デバイスである。これにより、本発明の第４の態様によれば、複数の正極接続部及び複数の負極接続部が、各正極集電体及び各負極集電体のそれぞれにおいて両端に形成されているため、発熱領域を最大限離間することができるため、上記した第１の態様と同様の作用効果をより効果的に奏することができる。 <Fourth aspect of the present invention>
According to a fourth aspect of the present invention, in the third aspect of the present invention described above, the plurality of positive electrode connection portions are respectively formed at both ends of the positive electrode current collector, and the plurality of negative electrode connection portions are respectively The electricity storage device according to claim 3, wherein the electricity storage device is formed at both ends of the negative electrode current collector. Thus, according to the fourth aspect of the present invention, the plurality of positive electrode connecting portions and the plurality of negative electrode connecting portions are formed at both ends in each of the positive electrode current collectors and the respective negative electrode current collectors. Since the regions can be separated as much as possible, the same operational effects as those of the first aspect described above can be achieved more effectively.

＜本発明の第５の態様＞
本発明の第５の態様は、上記した本発明の第１の態様において、前記外装体は、剛性体からなる角型である請求項１に記載の蓄電デバイスである。これにより、本発明の第５の態様によれば、外部からの衝撃に対して頑健である反面、放熱が困難であるプリズマティックタイプのバッテリに適用されることで、上記した第１の態様と同様の作用効果をより効果的に奏することができる他、頑健性との両立が可能になるという作用効果を奏することができる。 <Fifth aspect of the present invention>
5th aspect of this invention is an electrical storage device of Claim 1 whose said exterior body is a square shape which consists of a rigid body in the above-mentioned 1st aspect of this invention. Thus, according to the fifth aspect of the present invention, while applied to a prismatic type battery that is difficult to dissipate heat while being robust against external impacts, In addition to being able to achieve the same operational effect more effectively, it is possible to achieve the operational effect that compatibility with robustness becomes possible.

本発明の第１実施形態に係る蓄電デバイスの斜視図である。It is a perspective view of the electrical storage device concerning a 1st embodiment of the present invention. 図１中のＡ‐Ａ線に沿う断面を示した断面図である。It is sectional drawing which showed the cross section along the AA line in FIG. 本発明の第１実施形態に係る蓄電デバイスが備える電極体の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the electrode body with which the electrical storage device which concerns on 1st Embodiment of this invention is provided. 本発明の第２実施形態に係る蓄電デバイスが備える電極体の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the electrode body with which the electrical storage device which concerns on 2nd Embodiment of this invention is provided. 本発明の第３実施形態に係る蓄電デバイスが備える電極体の構成を模式的に示す構成図である。It is a block diagram which shows typically the structure of the electrode body with which the electrical storage device which concerns on 3rd Embodiment of this invention is provided. 本発明の第４実施形態に係る蓄電デバイスの斜視図である。It is a perspective view of the electrical storage device which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る蓄電デバイスの斜視図である。It is a perspective view of the electrical storage device which concerns on 5th Embodiment of this invention. 本発明の第６実施形態に係る蓄電デバイスの斜視図である。It is a perspective view of the electrical storage device which concerns on 6th Embodiment of this invention. 本発明の第７実施形態に係る蓄電デバイスの斜視図である。It is a perspective view of the electrical storage device which concerns on 7th Embodiment of this invention.

以下、図面を参照し、本発明の各実施の形態について詳細に説明する。なお、本発明は以下に説明する内容に限定されるものではなく、その要旨を変更しない範囲において任意に変更して実施することが可能である。また、実施の形態の説明に用いる図面は、いずれも構成部材を模式的に示すものであって、理解を深めるべく部分的な強調、拡大、縮小、または省略などを行っており、構成部材の縮尺や形状等を正確に表すものとはなっていない場合がある。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. In addition, the drawings used for the description of the embodiments schematically show constituent members, and are partially emphasized, enlarged, reduced, or omitted to deepen the understanding. In some cases, the scale, shape, and the like are not accurately represented.

＜第１実施形態＞
図１は、本発明の第１実施形態に係る蓄電デバイス１の斜視図である。また、図２は、図１中のＡ‐Ａ線に沿う断面を示した断面図である。蓄電デバイス１は、外装体２、複数の正極端子７ａ、７ｂ、複数の負極端子８ａ、８ｂ、及び電池要素９を備える。 <First Embodiment>
FIG. 1 is a perspective view of an electricity storage device 1 according to the first embodiment of the present invention. 2 is a cross-sectional view showing a cross section taken along the line AA in FIG. The electricity storage device 1 includes an exterior body 2, a plurality of positive terminals 7 a and 7 b, a plurality of negative terminals 8 a and 8 b, and a battery element 9.

外装体２は、上面ラミネートフィルム３と下面ラミネートフィルム４とを張り合わせて形成される。また、上面ラミネートフィルム３及び下面ラミネートフィルム４のそれぞれは、後述する電池要素９を両面から覆う被覆領域５、及び電池要素９の周縁において上面ラミネートフィルム３と下面ラミネートフィルム４とを融着する融着領域６からなる。すなわち、本実施形態に係る蓄電デバイス１の形態は所謂パウチ型である。   The exterior body 2 is formed by laminating the upper surface laminate film 3 and the lower surface laminate film 4. Each of the upper surface laminate film 3 and the lower surface laminate film 4 includes a covering region 5 that covers a battery element 9 that will be described later from both sides, and a melt that fuses the upper surface laminate film 3 and the lower surface laminate film 4 at the periphery of the battery element 9. It consists of a landing area 6. That is, the power storage device 1 according to the present embodiment is a so-called pouch type.

上面ラミネートフィルム３及び下面ラミネートフィルム４のそれぞれは、少なくとも表面及び裏面が絶縁性を有する材料からなるが、積層された３枚以上のシートにより構成されている場合には、内部のシートが導電性を備えてもよい。   Each of the upper surface laminate film 3 and the lower surface laminate film 4 is made of a material having an insulating property at least on the front surface and the back surface. However, if the upper surface laminate film 3 and the lower surface laminate film 4 are composed of three or more laminated sheets, the inner sheet is conductive. May be provided.

また、上面ラミネートフィルム３と下面ラミネートフィルム４との間には、図２に示すように、電池要素９が収容されている。電池要素９は、詳細を後述する電極体９ａ及び電解質９ｂからなり、外部から電力が供給されることにより充電することができ、放電することにより外部へ電力を供給することができる。   Moreover, as shown in FIG. 2, the battery element 9 is accommodated between the upper surface laminate film 3 and the lower surface laminate film 4. The battery element 9 includes an electrode body 9a and an electrolyte 9b, the details of which will be described later. The battery element 9 can be charged by supplying power from the outside, and can supply power to the outside by discharging.

正極端子７ａ、７ｂは、本実施形態においては上面ラミネートフィルム３の被覆領域５に形成されており、一端が外装体２の内部において電極体９ａに電気的に接続され、他端が外装体２の外部に露出するように形成されている。すなわち、上面ラミネートフィルム３の被覆領域５には、正極端子７ａ、７ｂを露出させるための２つの開口部が形成されている。   In the present embodiment, the positive terminals 7a and 7b are formed in the covering region 5 of the top laminate film 3, one end is electrically connected to the electrode body 9a inside the exterior body 2, and the other end is exterior body 2. It is formed so as to be exposed to the outside. That is, two openings for exposing the positive terminals 7 a and 7 b are formed in the covering region 5 of the upper surface laminate film 3.

負極端子８ａ、８ｂは、本実施形態においては下面ラミネートフィルム４の被覆領域５に形成されており、一端が外装体２の内部において電極体９ａに電気的に接続され、他端が外装体２の外部に露出するように形成されている。すなわち、下面ラミネートフィルム４の被覆領域５には、負極端子８ａ、８ｂを露出させるための２つの開口部が形成されている。   In this embodiment, the negative electrode terminals 8a and 8b are formed in the covering region 5 of the lower surface laminate film 4, and one end is electrically connected to the electrode body 9a inside the exterior body 2, and the other end is exterior body 2. It is formed so as to be exposed to the outside. That is, two openings for exposing the negative electrode terminals 8 a and 8 b are formed in the covering region 5 of the lower surface laminate film 4.

続いて、外装体２の内部に収容された電極体９ａの構成を説明する。図３は、本発明の第１実施形態に係る蓄電デバイス１が備える電極体９ａの構成を模式的に示す断面図である。電極体９ａは、正極部１０、負極部２０、及びセパレータ３０を備える。   Then, the structure of the electrode body 9a accommodated in the exterior body 2 is demonstrated. FIG. 3 is a cross-sectional view schematically showing the configuration of the electrode body 9a included in the electricity storage device 1 according to the first embodiment of the present invention. The electrode body 9 a includes a positive electrode part 10, a negative electrode part 20, and a separator 30.

正極部１０は、本実施形態においては、複数の平板状の正極集電体１１及び正極リード１２を含む。また、負極部２０は、本実施形態においては、複数の平板状の負極集電体２１及び負極リード２２を含む。そして、複数の正極集電体１１及び複数の負極集電体２１が、複数の平板状のセパレータ３０を介して鉛直方向に交互に積層されている。すなわち、正極集電体１１及び負極集電体２１は、セパレータ３０を介して対向し、周囲に設けられた電解質９ｂ（図３では図示を省略）により電池として機能する。尚、以降の各実施形態の説明においては、特に軸方向を指定しない限り、蓄電デバイス１の厚み方向を鉛直方向と称し、鉛直方向に垂直な方向を水平方向と称するものとする。   In the present embodiment, the positive electrode portion 10 includes a plurality of plate-like positive electrode current collectors 11 and positive electrode leads 12. Further, the negative electrode portion 20 includes a plurality of plate-like negative electrode current collectors 21 and negative electrode leads 22 in the present embodiment. A plurality of positive electrode current collectors 11 and a plurality of negative electrode current collectors 21 are alternately stacked in the vertical direction via a plurality of flat plate separators 30. That is, the positive electrode current collector 11 and the negative electrode current collector 21 face each other with the separator 30 interposed therebetween, and function as a battery by the electrolyte 9b (not shown in FIG. 3) provided in the periphery. In the following description of each embodiment, the thickness direction of the electricity storage device 1 is referred to as a vertical direction and the direction perpendicular to the vertical direction is referred to as a horizontal direction unless an axial direction is specified.

複数の正極集電体１１は、一端がセパレータ３０よりも水平方向の外側に向かって突出するように配置され、各正極集電体１１の当該突出部が互いに接続されると共に、正極リード１２の一端と接続される。また、正極リード１２は、電極体９ａにおける正極端子７ａ、７ｂが形成された面まで延在するように設けられ、正極端子７ａ、７ｂの両方に溶着される。すなわち、正極端子７ａ、７ｂは、正極リード１２を介して複数の正極集電体１１に電気的に接続される。   The plurality of positive electrode current collectors 11 are arranged so that one end protrudes outward in the horizontal direction from the separator 30, the protrusions of the respective positive electrode current collectors 11 are connected to each other, and the positive electrode lead 12 Connected to one end. The positive electrode lead 12 is provided so as to extend to the surface of the electrode body 9a where the positive electrode terminals 7a and 7b are formed, and is welded to both of the positive electrode terminals 7a and 7b. In other words, the positive terminals 7 a and 7 b are electrically connected to the plurality of positive current collectors 11 through the positive leads 12.

ここで、正極集電体１１は、例えばアルミニウムからなるパンチングメタルであり、セパレータ３０を介して負極集電体２１に対向する領域に、図示しない正極活物質が塗布されている。また、正極リード１２は、導電性を有する材料からなり、正極集電体１１と正極端子７ａ、７ｂとを電気的に接続できれば種々の形状で形成することができるが、電気伝導に係る断面積を広げて抵抗損失を抑制しつつ、省スペース化する観点から、平板状に形成することが好ましい。さらに、正極活物質が塗布されていない正極集電体１１の一端が、正極端子７ａ、７ｂが形成された面まで延在するように設けられることにより、正極リード１２を正極集電体１１の一部で代用してもよい。   Here, the positive electrode current collector 11 is a punching metal made of, for example, aluminum, and a positive electrode active material (not shown) is applied to a region facing the negative electrode current collector 21 through the separator 30. The positive electrode lead 12 is made of a conductive material, and can be formed in various shapes as long as the positive electrode current collector 11 and the positive electrode terminals 7a and 7b can be electrically connected. From the viewpoint of space saving while suppressing the resistance loss by expanding the width, it is preferable to form a flat plate. Furthermore, one end of the positive electrode current collector 11 to which the positive electrode active material is not applied is provided so as to extend to the surface on which the positive electrode terminals 7 a and 7 b are formed, whereby the positive electrode lead 12 is connected to the positive electrode current collector 11. Some may be substituted.

複数の負極集電体２１は、正極集電体１１の一端とは反対側の水平方向外側に向かって、負極集電体２１の一端がセパレータ３０よりも突出するように配置され、各負極集電体２１の当該突出部が互いに接続されると共に、負極リード２２の一端と接続される。また、負極リード２２は、電極体９ａにおける負極端子８ａ、８ｂが形成された面まで延在するように設けられ、負極端子８ａ、８ｂの両方に溶着される。すなわち、負極端子８ａ、８ｂは、負極リード２２を介して複数の負極集電体２１に電気的に接続される。   The plurality of negative electrode current collectors 21 are arranged so that one end of the negative electrode current collector 21 protrudes beyond the separator 30 toward the outer side in the horizontal direction opposite to one end of the positive electrode current collector 11. The protrusions of the electric body 21 are connected to each other and to one end of the negative electrode lead 22. The negative electrode lead 22 is provided so as to extend to the surface of the electrode body 9a where the negative electrode terminals 8a and 8b are formed, and is welded to both the negative electrode terminals 8a and 8b. That is, the negative electrode terminals 8 a and 8 b are electrically connected to the plurality of negative electrode current collectors 21 via the negative electrode lead 22.

ここで、負極集電体２１は、例えば銅からなるパンチングメタルであり、セパレータ３０を介して正極集電体１１に対向する領域に、図示しない負極活物質が塗布されている。また、負極リード２２は、導電性を有する材料からなり、負極集電体２１と負極端子８ａ、８ｂとを電気的に接続できれば種々の形状で形成することができるが、電気伝導に係る断面積を広げて抵抗損失を抑制しつつ、省スペース化する観点から、平板状に形成することが好ましい。さらに、負極活物質が塗布されていない負極集電体２１の一端が、負極端子８ａ、８ｂが形成された面まで延在するように設けられることにより、負極リード２２を負極集電体２１の一部で代用してもよい。   Here, the negative electrode current collector 21 is a punching metal made of copper, for example, and a negative electrode active material (not shown) is applied to a region facing the positive electrode current collector 11 through the separator 30. The negative electrode lead 22 is made of a conductive material, and can be formed in various shapes as long as the negative electrode current collector 21 and the negative electrode terminals 8a and 8b can be electrically connected. From the viewpoint of space saving while suppressing the resistance loss by expanding the width, it is preferable to form a flat plate. Furthermore, one end of the negative electrode current collector 21 not coated with the negative electrode active material is provided so as to extend to the surface on which the negative electrode terminals 8a and 8b are formed, whereby the negative electrode lead 22 is connected to the negative electrode current collector 21. Some may be substituted.

以上のように、本発明の第１実施形態に係る蓄電デバイス１によれば、蓄電デバイス１の外部との間で行われる充放電に伴う電流は、正極部１０に対しては複数の正極端子７ａ、７ｂに分岐して流れ、負極部２０に対しては複数の負極端子８ａ、８ｂに分岐して流れることになる。そのため、電極体９ａの発熱は、正極端子７ａ、７ｂ及び負極端子８ａ、８ｂのそれぞれの近傍領域に分割されることになり、局所的に顕著な発熱を緩和することができる。また、電極体９ａの部分ごとの発熱が分散されることから、充放電に伴う局所的な膨張領域についても、正極端子７ａ、７ｂ及び負極端子８ａ、８ｂのそれぞれの近傍領域に分割されることになり、個々の近傍領域における膨張量を抑制することができ、外装体２の厚みを小さくして蓄電デバイス１を少スペース化することができる。従って、本発明の第１実施形態に係る蓄電デバイス１によれば、バッテリの不均一な劣化を抑制しつつ、エネルギー密度の向上に寄与することができる。   As described above, according to the electricity storage device 1 according to the first embodiment of the present invention, the current accompanying charging / discharging with the outside of the electricity storage device 1 is a plurality of positive electrode terminals with respect to the positive electrode portion 10. The flow branches and flows to 7a and 7b, and flows to the negative electrode portion 20 by branching to a plurality of negative terminals 8a and 8b. Therefore, the heat generation of the electrode body 9a is divided into the vicinity regions of the positive electrode terminals 7a and 7b and the negative electrode terminals 8a and 8b, and the remarkable heat generation can be relieved locally. In addition, since the heat generation for each portion of the electrode body 9a is dispersed, the local expansion region associated with charging / discharging is also divided into the adjacent regions of the positive electrode terminals 7a and 7b and the negative electrode terminals 8a and 8b. Thus, the amount of expansion in each neighboring region can be suppressed, and the thickness of the exterior body 2 can be reduced to reduce the space of the electricity storage device 1. Therefore, according to the electrical storage device 1 according to the first embodiment of the present invention, it is possible to contribute to an improvement in energy density while suppressing non-uniform deterioration of the battery.

＜第２実施形態＞
次に、本発明の第２実施形態について説明する。本実施形態の蓄電デバイス１は、外装体２の内部における電極体９ａの構成が上記した第１実施形態の蓄電デバイス１と異なる。以下、第１実施形態と異なる部分について説明することとし、第１実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 Second Embodiment
Next, a second embodiment of the present invention will be described. The electricity storage device 1 of the present embodiment is different from the electricity storage device 1 of the first embodiment described above in the configuration of the electrode body 9a inside the exterior body 2. Hereinafter, parts different from those of the first embodiment will be described, and components common to the first embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

図４は、本発明の第２実施形態に係る蓄電デバイス１が備える電極体１０９ａの構成を模式的に示す断面図である。   FIG. 4 is a cross-sectional view schematically showing the configuration of the electrode body 109a included in the electricity storage device 1 according to the second embodiment of the present invention.

本実施形態においては、電極体１０９ａは、正極部１１０、負極部１２０、及びセパレータ１３０をそれぞれ１枚ずつ備える。また、正極部１１０及び負極部１２０は、セパレータ１３０を介して対向しつつ、扁平形状となるように捲回されている。   In the present embodiment, the electrode body 109a includes one positive electrode part 110, one negative electrode part 120, and one separator 130. Moreover, the positive electrode part 110 and the negative electrode part 120 are wound so as to have a flat shape while facing each other with the separator 130 interposed therebetween.

ここで、電極体１０９ａにおいて、正極端子７ａ、７ｂが形成された面では、負極部１２０よりも正極部１１０が外側になるように配置されている。そして、正極部１１０は、当該外側に位置する部分において、正極端子７ａ、７ｂの両方に溶着される。これにより、正極部１１０は、正極端子７ａ、７ｂと電気的に接続される。尚、図４に示すように、正極部１１０の上記外側の部分よりもさらに外側にセパレータ１３０を延在させる場合には、セパレータ１３０を部分的に開口させることで、正極部１１０と正極端子７ａ、７ｂとの接続を妨げないようにすることができる。   Here, in the electrode body 109a, the positive electrode portion 110 is disposed outside the negative electrode portion 120 on the surface where the positive electrode terminals 7a and 7b are formed. And the positive electrode part 110 is welded to both the positive electrode terminals 7a and 7b in the part located in the said outer side. Thereby, the positive electrode part 110 is electrically connected to the positive electrode terminals 7a and 7b. In addition, as shown in FIG. 4, when extending the separator 130 further outside the said outer part of the positive electrode part 110, the positive electrode part 110 and the positive electrode terminal 7a are opened by partially opening the separator 130. , 7b can be prevented from being disturbed.

また、電極体１０９ａにおいて、負極端子８ａ、８ｂが形成された面では、正極部１１０よりも負極部１２０が外側になるように配置されている。そして、負極部１２０は、当該外側の部分において、負極端子８ａ、８ｂの両方に溶着される。これにより、負極部１２０は、負極端子８ａ、８ｂと電気的に接続される。尚、図４に示すように、負極部１２０の上記外側の部分よりもさらに外側にセパレータ１３０を延在させる場合には、セパレータ１３０を部分的に開口させることで、負極部１２０と負極端子８ａ、８ｂとの接続を妨げないようにすることができる。   In addition, in the electrode body 109 a, the negative electrode portion 120 is disposed outside the positive electrode portion 110 on the surface where the negative electrode terminals 8 a and 8 b are formed. And the negative electrode part 120 is welded to both the negative electrode terminals 8a and 8b in the said outer part. Thereby, the negative electrode part 120 is electrically connected with the negative electrode terminals 8a and 8b. As shown in FIG. 4, when the separator 130 is extended further outside than the outer portion of the negative electrode portion 120, the negative electrode portion 120 and the negative electrode terminal 8 a are opened by partially opening the separator 130. , 8b can be prevented from being disturbed.

以上のように、本発明の第２実施形態に係る蓄電デバイス１によれば、上記した第１実施形態に係る蓄電デバイス１と同様の理由により、局所的に顕著な発熱を緩和することができ、また、充放電に伴う局所的な膨張を抑制することができる。従って、本発明の第２実施形態に係る蓄電デバイス１によれば、上記した第１実施形態に係る蓄電デバイス１と同様に、バッテリの不均一な劣化を抑制しつつ、エネルギー密度の向上に寄与することができる。   As described above, according to the electricity storage device 1 according to the second embodiment of the present invention, significant heat generation can be relieved locally for the same reason as the electricity storage device 1 according to the first embodiment described above. Moreover, the local expansion | swelling accompanying charging / discharging can be suppressed. Therefore, according to the electricity storage device 1 according to the second embodiment of the present invention, similarly to the electricity storage device 1 according to the first embodiment described above, it contributes to an improvement in energy density while suppressing non-uniform deterioration of the battery. can do.

＜第３実施形態＞
次に、本発明の第３実施形態について説明する。本実施形態の蓄電デバイス１は、外装体２の内部における電極体９ａ、１０９ａの構成が上記した第１実施形態及び第２実施形態の蓄電デバイス１と異なる。以下、第１実施形態及び第２実施形態と異なる部分について説明することとし、第１実施形態及び第２実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 <Third Embodiment>
Next, a third embodiment of the present invention will be described. The electricity storage device 1 of the present embodiment is different from the electricity storage devices 1 of the first embodiment and the second embodiment described above in the configuration of the electrode bodies 9a and 109a inside the exterior body 2. Hereinafter, parts different from the first embodiment and the second embodiment will be described, and the same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

図５は、本発明の第３実施形態に係る蓄電デバイス１が備える電極体２０９ａの構成を模式的に示す構成図である。図５は、より詳しくは、電極体２０９ａの構成、及び電極体２０９ａと各電極との接続形態を分解斜視図的に示す構成図である。   FIG. 5 is a configuration diagram schematically showing the configuration of the electrode body 209a included in the electricity storage device 1 according to the third embodiment of the present invention. 5 is an exploded perspective view showing the configuration of the electrode body 209a and the connection form between the electrode body 209a and each electrode in more detail.

電極体２０９ａは、本実施形態においては、上記した第１実施形態に係る蓄電デバイス１と同様に、正極部２１０としての複数の平板状の正極集電体２１１及び負極部２２０としての複数の平板状の負極集電体２２１を備える。また、電極体２０９ａは、複数の正極集電体２１１及び複数の負極集電体２２１とが鉛直方向に交互に積層され、図示を省略したセパレータ２３０を介して対向するように構成されている。   In the present embodiment, the electrode body 209a has a plurality of plate-like positive electrode current collectors 211 as the positive electrode portions 210 and a plurality of flat plates as the negative electrode portions 220, like the power storage device 1 according to the first embodiment described above. A negative electrode current collector 221 is provided. The electrode body 209a is configured such that a plurality of positive electrode current collectors 211 and a plurality of negative electrode current collectors 221 are alternately stacked in the vertical direction and face each other via a separator 230 (not shown).

ここで、それぞれの正極集電体２１１には、互いに異なる位置に複数の正極接続部２１３が形成されている。複数の正極接続部２１３は、図５に示すように、正極集電体２１１の一端側に形成された正極接続部２１３ａと他端側に形成された正極接続部２１３ｂとが、正極集電体２１１の水平方向の両端に向けて突出するように設けられる。そして、正極接続部２１３ａ、２１３ｂのそれぞれは、積層される複数の正極集電体２１１に亘って鉛直方向に重なるように各正極集電体２１１の同じ位置に設けられ、鉛直方向に重なる正極接続部２１３同士が溶着により一体化される。   Here, each positive electrode current collector 211 is formed with a plurality of positive electrode connection portions 213 at different positions. As shown in FIG. 5, the plurality of positive electrode connecting portions 213 includes a positive electrode connecting portion 213 a formed on one end side of the positive electrode current collector 211 and a positive electrode connecting portion 213 b formed on the other end side. 211 is provided so as to protrude toward both ends in the horizontal direction. Each of the positive electrode connecting portions 213a and 213b is provided at the same position of each positive electrode current collector 211 so as to overlap the plurality of stacked positive electrode current collectors 211 in the vertical direction. The parts 213 are integrated by welding.

また、正極集電体２１１の一端側において一体に溶着された複数の正極接続部２１３ａは、一方の正極端子７ａに電気的に接続され、正極集電体２１１の他端側において一体に溶着された複数の正極接続部２１３ｂは、他方の正極端子７ｂに電気的に接続される。すなわち、複数の正極端子７ａ、７ｂは、正極集電体２１１の両端に形成された複数の正極接続部２１３のいずれかに接続され、各正極集電体２１１の両側において充放電に伴う電流を流すことができる。ここで、正極端子７ａ、７ｂと正極接続部２１３との接続態様は、上記した第１実施形態と同様に、種々の構成により可能である。   Further, the plurality of positive electrode connection portions 213a integrally welded on one end side of the positive electrode current collector 211 are electrically connected to one positive electrode terminal 7a and are integrally welded on the other end side of the positive electrode current collector 211. The plurality of positive electrode connecting portions 213b are electrically connected to the other positive electrode terminal 7b. That is, the plurality of positive electrode terminals 7 a and 7 b are connected to one of the plurality of positive electrode connection portions 213 formed at both ends of the positive electrode current collector 211, and currents associated with charging / discharging are provided on both sides of each positive electrode current collector 211. It can flow. Here, the connection mode between the positive terminals 7a and 7b and the positive electrode connecting portion 213 is possible by various configurations as in the first embodiment.

それぞれの負極集電体２２１は、正極集電体２１１と同様に、互いに異なる位置に複数の負極接続部２２３が形成されている。複数の負極接続部２２３は、図５に示すように、負極集電体２２１の一端側に形成された負極接続部２２３ａと他端側に形成された負極接続部２２３ｂとが、負極集電体２２１の水平方向の両端に向けて突出するように設けられる。そして、負極接続部２２３ａ、２２３ｂのそれぞれは、積層される複数の負極集電体２２１に亘って鉛直方向に重なるように各負極集電体２２１の同じ位置に設けられ、鉛直方向に重なる負極接続部２２３同士が溶着により一体化される。尚、正極接続部２１３と負極接続部２２３とは、互いに鉛直方向に重ならないように配置されている。   Each of the negative electrode current collectors 221 has a plurality of negative electrode connection portions 223 formed at different positions, like the positive electrode current collector 211. As shown in FIG. 5, the plurality of negative electrode connecting portions 223 includes a negative electrode connecting portion 223 a formed on one end side of the negative electrode current collector 221 and a negative electrode connecting portion 223 b formed on the other end side. 221 is provided so as to protrude toward both ends in the horizontal direction. And each of the negative electrode connection parts 223a and 223b is provided in the same position of each negative electrode collector 221 so that it may overlap in the vertical direction over the some negative electrode collector 221 laminated | stacked, and the negative electrode connection which overlaps in the vertical direction The parts 223 are integrated by welding. In addition, the positive electrode connection part 213 and the negative electrode connection part 223 are arrange | positioned so that it may not mutually overlap in a perpendicular direction.

また、負極集電体２２１の一端側において一体に溶着された複数の負極接続部２２３ａは、一方の負極端子８ａに電気的に接続され、負極集電体２２１の他端側において一体に溶着された複数の負極接続部２２３ｂは、他方の負極端子８ｂに電気的に接続される。すなわち、複数の負極端子８ａ、８ｂは、負極集電体２２１の両端に形成された複数の負極接続部２２３のいずれかに接続され、各負極集電体２２１の両側において充放電に伴う電流を流すことができる。ここで、負極端子８ａ、８ｂと負極接続部２２３との接続態様は、上記した第１実施形態と同様に、種々の構成により可能である。   The plurality of negative electrode connecting portions 223a integrally welded on one end side of the negative electrode current collector 221 are electrically connected to one negative electrode terminal 8a and are integrally welded on the other end side of the negative electrode current collector 221. The plurality of negative electrode connecting portions 223b are electrically connected to the other negative electrode terminal 8b. That is, the plurality of negative electrode terminals 8 a and 8 b are connected to one of the plurality of negative electrode connection portions 223 formed at both ends of the negative electrode current collector 221, and currents associated with charging / discharging on both sides of each negative electrode current collector 221. It can flow. Here, the connection mode of the negative electrode terminals 8a and 8b and the negative electrode connection portion 223 can be achieved by various configurations as in the first embodiment.

以上のように、本発明の第３実施形態に係る蓄電デバイス１によれば、上記した第１実施形態又は第２実施形態に係る蓄電デバイス１と同様の作用効果を奏することに加え、各正極集電体２１１及び各負極集電体２２１の両側において充放電に伴う電流を流すことにより発熱領域を最大限離間することができるため、さらに効果的にバッテリの不均一な劣化を抑制しつつエネルギー密度の向上させることができる。   As described above, according to the electricity storage device 1 according to the third embodiment of the present invention, each positive electrode has the same effect as the electricity storage device 1 according to the first embodiment or the second embodiment described above. Since the heat generating region can be separated as much as possible by flowing a current accompanying charging / discharging on both sides of the current collector 211 and each negative electrode current collector 221, energy can be effectively suppressed while suppressing uneven deterioration of the battery more effectively. The density can be improved.

＜第４実施形態＞
次に、本発明の第４実施形態について説明する。本実施形態の蓄電デバイス３０１は、正極端子３０７ａ、３０７ｂ、及び負極端子３０８ａ、３０８ｂの構成が上記した第１実施形態乃至第３実施形態の蓄電デバイス１と異なる。以下、第１実施形態乃至第３実施形態と異なる部分について説明することとし、第１実施形態乃至第３実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 <Fourth embodiment>
Next, a fourth embodiment of the present invention will be described. The power storage device 301 of the present embodiment is different from the power storage device 1 of the first to third embodiments described above in the configuration of the positive terminals 307a and 307b and the negative terminals 308a and 308b. Hereinafter, parts different from the first embodiment to the third embodiment will be described, and the same components as those in the first embodiment to the third embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

図６は、本発明の第４実施形態に係る蓄電デバイス３０１の斜視図である。本実施形態においては、外装体２の内部の電池要素９は、上記した第１実施形態乃至第３実施形態のいずれかの態様と同様である。   FIG. 6 is a perspective view of an electricity storage device 301 according to the fourth embodiment of the present invention. In the present embodiment, the battery element 9 inside the exterior body 2 is the same as any one of the above-described first to third embodiments.

本実施形態に係る蓄電デバイス３０１では、正極端子３０７ａ、３０７ｂは、上面ラミネートフィルム３の被覆領域５において、それぞれ環状に形成されて配置されている。また、図６では図示を省略しているが、負極端子３０８ａ、３０８ｂは、正極端子３０７ａ、３０７ｂと同様に下面ラミネートフィルム４の被覆領域５において、それぞれ環状に形成されて配置されている。   In the electricity storage device 301 according to the present embodiment, the positive terminals 307 a and 307 b are each formed in an annular shape in the covering region 5 of the upper surface laminate film 3. Moreover, although illustration is abbreviate | omitted in FIG. 6, the negative electrode terminals 308a and 308b are each cyclically | annularly formed and arrange | positioned in the coating area | region 5 of the lower surface laminate film 4 similarly to the positive electrode terminals 307a and 307b.

以上のように、本発明の第４実施形態に係る蓄電デバイス３０１によれば、上記した第１実施形態乃至第３実施形態に係る蓄電デバイス１と同様の理由により、バッテリの不均一な劣化を抑制しつつ、エネルギー密度の向上に寄与することができる。尚、各電極の数は２つに限定されるものではなく、例えば被覆領域５において上記した環状の正極端子３０７ａ、３０７ｂを水平方向に２つ配設してもよい。   As described above, according to the electricity storage device 301 according to the fourth embodiment of the present invention, the battery is unevenly deteriorated for the same reason as the electricity storage device 1 according to the first to third embodiments described above. While suppressing, it can contribute to the improvement of energy density. The number of each electrode is not limited to two. For example, two annular positive terminals 307a and 307b described above may be disposed in the horizontal direction in the covering region 5.

＜第５実施形態＞
次に、本発明の第５実施形態について説明する。本実施形態の蓄電デバイス１は、外装体２の構成が上記した第１実施形態乃至第４実施形態の蓄電デバイス１と異なる。以下、第１実施形態乃至第４実施形態と異なる部分について説明することとし、第１実施形態乃至第４実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 <Fifth Embodiment>
Next, a fifth embodiment of the present invention will be described. The electricity storage device 1 of the present embodiment is different from the electricity storage device 1 of the first to fourth embodiments described above in the configuration of the exterior body 2. Hereinafter, parts different from the first embodiment to the fourth embodiment will be described, and the same reference numerals are given to components common to the first embodiment to the fourth embodiment, and detailed description thereof will be omitted.

図７は、本発明の第５実施形態に係る蓄電デバイス４０１の斜視図である。本実施形態においては、外装体４０２の内部の電池要素９は、上記した第１実施形態乃至第４実施形態のいずれかの態様と同様である。   FIG. 7 is a perspective view of an electricity storage device 401 according to the fifth embodiment of the present invention. In the present embodiment, the battery element 9 inside the exterior body 402 is the same as any one of the first to fourth embodiments described above.

本実施形態に係る蓄電デバイス４０１では、外装体４０２は、例えばアルミニウムの剛性体からなる角型であり、いわゆるプリズマティックタイプのバッテリである。尚、外装体４０２と電池要素９の電極体９ａとの間は絶縁されている。図７においては、複数の蓄電デバイス４０１を図７中のＹ軸で示される方向に複数配置した状態を示している。   In the electricity storage device 401 according to the present embodiment, the exterior body 402 is a rectangular shape made of, for example, an aluminum rigid body, and is a so-called prismatic type battery. In addition, the exterior body 402 and the electrode body 9a of the battery element 9 are insulated. 7 shows a state in which a plurality of power storage devices 401 are arranged in the direction indicated by the Y axis in FIG.

蓄電デバイス４０１は、従来の角型バッテリと同様に、図７中のＺ軸で示される方向に外装体４０２から正極端子７ａ及び負極端子８ａが突出するように形成されている。そして、本実施形態では、蓄電デバイス１は、図７中のＸ軸で示される両側方向に外装体４０２から正極端子７ｂ及び負極端子８ｂが突出するように形成されている。   The power storage device 401 is formed so that the positive electrode terminal 7a and the negative electrode terminal 8a protrude from the exterior body 402 in the direction indicated by the Z-axis in FIG. And in this embodiment, the electrical storage device 1 is formed so that the positive electrode terminal 7b and the negative electrode terminal 8b may protrude from the exterior body 402 in the both-side direction shown by the X-axis in FIG.

ここで、図７中のＹ軸で示される方向に配置された複数の蓄電デバイス４０１は、正極端子７ａ、７ｂ、及び負極端子８ａ、８ｂのそれぞれがＹ軸方向に並ぶため、対応する各端子を直線的に接続することにより、複数の蓄電デバイス４０１を並列に接続することができる。   Here, in the plurality of power storage devices 401 arranged in the direction indicated by the Y axis in FIG. 7, the positive terminals 7 a and 7 b and the negative terminals 8 a and 8 b are arranged in the Y axis direction. Are connected linearly, a plurality of power storage devices 401 can be connected in parallel.

一般的には、プリズマティックタイプのバッテリは、筐体が剛性体からなるため、外部からの衝撃に対して頑健である反面、内部の電池反応に伴い発生した熱に対して均一に冷却することが困難である。しかしながら、本実施形態に係る蓄電デバイス４０１は、複数の正極端子７ａ、７ｂ及び複数の負極端子８ａ、８ｂを備えるため、上記した第１実施形態乃至第４実施形態に係る蓄電デバイス１と同様の作用効果と衝撃に対する頑健性を両立することができる。   In general, a prismatic type battery is rigid against the impact from the outside because the casing is made of a rigid body, but it cools uniformly against the heat generated by the internal battery reaction. Is difficult. However, since the electricity storage device 401 according to the present embodiment includes the plurality of positive terminals 7a and 7b and the plurality of negative terminals 8a and 8b, it is the same as the electricity storage device 1 according to the first to fourth embodiments described above. It is possible to achieve both effects and robustness against impact.

＜第６実施形態＞
次に、本発明の第６実施形態について説明する。本実施形態の蓄電デバイス５０１は、正極端子７ａ、７ｂ及び複数の負極端子８ａ、８ｂの構成が上記した第５実施形態の蓄電デバイス４０１と異なる。以下、第５実施形態と異なる部分について説明することとし、第５実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 <Sixth Embodiment>
Next, a sixth embodiment of the present invention will be described. The power storage device 501 of the present embodiment is different from the power storage device 401 of the fifth embodiment described above in the configuration of the positive terminals 7a and 7b and the plurality of negative terminals 8a and 8b. Hereinafter, parts different from the fifth embodiment will be described, and the same components as those in the fifth embodiment will be denoted by the same reference numerals and detailed description thereof will be omitted.

図８は、本発明の第６実施形態に係る蓄電デバイス５０１の斜視図である。本実施形態においては、外装体５０２の内部の電池要素９は、上記した第５実施形態と同様である。本実施形態の外装体５０２は、直方体形状であり、図８中のＹ軸で示される方向を向く２つ面のうち、一方の面全体が正極端子７ａであり、他方の面全体が負極端子８ａである。また、外装体４０２の図８中のＸ軸で示される方向を向く２つ面のうち、一方の面全体が正極端子７ｂであり、他方の面全体が負極端子８ｂである。尚、図８において、直方体形状の外装体５０２の互い隣接する面は、辺の部分において絶縁されている。   FIG. 8 is a perspective view of an electricity storage device 501 according to the sixth embodiment of the present invention. In the present embodiment, the battery element 9 inside the exterior body 502 is the same as in the fifth embodiment described above. The exterior body 502 of the present embodiment has a rectangular parallelepiped shape, and one of the two surfaces facing the direction indicated by the Y axis in FIG. 8 is entirely the positive electrode terminal 7a, and the other surface is the entire negative electrode terminal. 8a. Further, of the two surfaces of the exterior body 402 facing the direction indicated by the X axis in FIG. 8, one whole surface is the positive electrode terminal 7b and the other whole surface is the negative electrode terminal 8b. In FIG. 8, adjacent surfaces of the rectangular parallelepiped exterior body 502 are insulated at the side portions.

ここで、本実施形態に係る蓄電デバイス５０１は、図８中のＸ軸及びＹ軸で示される方向に複数隣接して配置されることにより、Ｘ軸及びＹ軸で示される方向に直列に接続することができる。これにより、複数の蓄電デバイス５０１を直列に接続する場合に、互いの蓄電デバイス５０１を電気的に導通させるための新たな部材が不要になり、接続の簡素化及び製造コストの削減が可能になる。   Here, the power storage device 501 according to the present embodiment is connected in series in the direction indicated by the X axis and the Y axis by being disposed adjacent to the direction indicated by the X axis and the Y axis in FIG. can do. Thereby, when connecting a plurality of power storage devices 501 in series, a new member for electrically connecting the power storage devices 501 to each other becomes unnecessary, and the connection can be simplified and the manufacturing cost can be reduced. .

以上のように、本発明の第６実施形態に係る蓄電デバイス５０１によれば、上記した第５実施形態に係る蓄電デバイス１と同様の理由により、第５実施形態に係る蓄電デバイス１と同様の作用効果を奏することができる。   As described above, according to the electricity storage device 501 according to the sixth embodiment of the present invention, the same as the electricity storage device 1 according to the fifth embodiment for the same reason as the electricity storage device 1 according to the fifth embodiment described above. An effect can be produced.

＜第７実施形態＞
次に、本発明の第７実施形態について説明する。本実施形態の蓄電デバイス６０１は、正極端子７ａ、７ｂ及び複数の負極端子８ａ、８ｂの構成が上記した第６実施形態の蓄電デバイス１と異なる。以下、第６実施形態と異なる部分について説明することとし、第６実施形態と共通する構成要素については、同じ符号を付して詳細な説明を省略する。 <Seventh embodiment>
Next, a seventh embodiment of the present invention will be described. The electricity storage device 601 of the present embodiment is different from the electricity storage device 1 of the sixth embodiment described above in the configuration of the positive terminals 7a and 7b and the plurality of negative terminals 8a and 8b. Hereinafter, parts different from the sixth embodiment will be described, and the same components as those in the sixth embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

図９は、本発明の第７実施形態に係る蓄電デバイス６０１の斜視図である。本実施形態においては、外装体６０２の内部の電池要素９は、上記した第５実施形態と同様である。本実施形態の外装体６０２は、直方体形状であり、図９中のＹ軸で示される方向を向く２つ面のうち、一方の面に正極端子７ａ、７ｂが形成され、他方の面に負極端子８ａ、８ｂが形成されている。尚、正極端子７ａ、７ｂ及び負極端子８ａ、８ｂの形状は、図６のように環状に形成されてもよい。   FIG. 9 is a perspective view of an electricity storage device 601 according to the seventh embodiment of the present invention. In the present embodiment, the battery element 9 inside the exterior body 602 is the same as that in the fifth embodiment described above. The exterior body 602 of the present embodiment has a rectangular parallelepiped shape, and positive electrodes 7a and 7b are formed on one surface of two surfaces facing the direction indicated by the Y axis in FIG. 9, and a negative electrode is formed on the other surface. Terminals 8a and 8b are formed. The shapes of the positive terminals 7a and 7b and the negative terminals 8a and 8b may be annular as shown in FIG.

ここで、本実施形態に係る蓄電デバイス１は、図９中のＹ軸で示される方向に複数隣接して配置されることにより、Ｙ軸で示される方向に直列に接続することができる。   Here, the plurality of power storage devices 1 according to the present embodiment can be connected in series in the direction indicated by the Y axis by being arranged adjacent to each other in the direction indicated by the Y axis in FIG. 9.

以上のように、本発明の第７実施形態に係る蓄電デバイス６０１によれば、上記した第５実施形態に係る蓄電デバイス１と同様の理由により、第５実施形態に係る蓄電デバイス１と同様の作用効果を奏することができる。   As described above, according to the electricity storage device 601 according to the seventh embodiment of the present invention, the same as the electricity storage device 1 according to the fifth embodiment, for the same reason as the electricity storage device 1 according to the fifth embodiment described above. An effect can be produced.

以上で実施形態の説明を終えるが、本発明は上記した実施形態に限定されるものではない。例えば上記各実施形態では、正極端子７ａ、７ｂ及び負極端子８ａ、８ｂを各２つ設けた態様を示したが、より多くの端子を設けることにより、充放電に伴う電流をさらに分散させることができる。   Although the description of the embodiment is finished as described above, the present invention is not limited to the above-described embodiment. For example, in each of the above-described embodiments, two positive electrode terminals 7a and 7b and two negative electrode terminals 8a and 8b are provided. However, by providing more terminals, the current associated with charging and discharging can be further dispersed. it can.

１ 蓄電デバイス
２ 外装体
７ａ、７ｂ 正極端子
８ａ、８ｂ 負極端子
９ 電池要素
１０ 正極部
２０ 負極部
３０ セパレータ
DESCRIPTION OF SYMBOLS 1 Electric power storage device 2 Exterior body 7a, 7b Positive electrode terminal 8a, 8b Negative electrode terminal 9 Battery element 10 Positive electrode part 20 Negative electrode part 30 Separator

Claims (1)

正極部及び負極部がセパレータを介して対向し、前記正極部、前記負極部、及び前記セパレータの周囲に電解質が設けられた構造を有する電池要素と、
前記電池要素を収容する外装体と、
前記外装体の前記電池要素を覆う領域において形成され、一端が前記正極部に電気的に接続されると共に、他端が前記外装体の外部に露出する正極端子と、
前記外装体の前記電池要素を覆う領域において形成され、一端が前記負極部に電気的に接続されると共に、他端が前記外装体の外部に露出する負極端子と、を備え、
前記正極端子及び前記負極端子は、それぞれ複数設けられ、
前記外装体は、２枚のラミネートフィルムを張り合わせてなるパウチ型であり、
前記電池要素は、前記正極部を構成する複数の正極集電体と、前記負極部を構成する複数の負極集電体とが前記セパレータを介して交互に積層された構造を有し、
複数の前記正極端子のそれぞれは、前記正極集電体の互いに異なる位置に形成された複数の正極接続部のいずれかに電気的に接続され、
複数の前記負極端子のそれぞれは、前記負極集電体の互いに異なる位置に形成された複数の負極接続部のいずれかに電気的に接続され、
複数の前記正極接続部は、それぞれ前記正極集電体の両端に形成され、
複数の前記負極接続部は、それぞれ前記負極集電体の両端に形成される蓄電デバイス。 A battery element having a structure in which a positive electrode part and a negative electrode part are opposed to each other via a separator, and an electrolyte is provided around the positive electrode part, the negative electrode part, and the separator;
An exterior body that houses the battery element;
A positive electrode terminal formed in a region covering the battery element of the exterior body, one end of which is electrically connected to the positive electrode portion and the other end is exposed to the outside of the exterior body;
A negative electrode terminal formed in a region covering the battery element of the exterior body, one end of which is electrically connected to the negative electrode portion and the other end is exposed to the outside of the exterior body,
A plurality of the positive terminals and the negative terminals are provided ,
The exterior body is a pouch type formed by laminating two laminate films,
The battery element has a structure in which a plurality of positive electrode current collectors constituting the positive electrode part and a plurality of negative electrode current collectors constituting the negative electrode part are alternately stacked via the separator,
Each of the plurality of positive electrode terminals is electrically connected to any of a plurality of positive electrode connection portions formed at different positions of the positive electrode current collector,
Each of the plurality of negative electrode terminals is electrically connected to one of a plurality of negative electrode connection portions formed at different positions of the negative electrode current collector,
The plurality of positive electrode connection portions are respectively formed at both ends of the positive electrode current collector,
The plurality of negative electrode connecting portions are power storage devices formed at both ends of the negative electrode current collector, respectively .
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WO2021235166A1 (en) * 2020-05-19 2021-11-25 パナソニックＩｐマネジメント株式会社 Battery and method for producing same
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JP2001216950A (en) * 2000-02-02 2001-08-10 Sony Corp Chip type battery and battery pack device
US20020136946A1 (en) * 2001-03-21 2002-09-26 Amatucci Glenn G. High voltage rechargeable electrochemical energy storage system structure
JP3850732B2 (en) * 2002-01-29 2006-11-29 松下電器産業株式会社 Square sealed battery and assembled battery
JP5256589B2 (en) * 2006-07-07 2013-08-07 日本電気株式会社 An assembled battery in which a plurality of film-clad batteries are arranged adjacent to each other
JP2009093824A (en) * 2007-10-04 2009-04-30 Sumitomo Electric Ind Ltd Power storage device
DE102009057368A1 (en) * 2009-12-08 2011-06-09 Li-Tec Battery Gmbh Electrochemical energy storage and arrangement of a plurality of such electrochemical energy storage
DE102010026093A1 (en) * 2010-07-05 2012-01-05 Li-Tec Battery Gmbh Galvanic cell
DE102011080968A1 (en) * 2011-08-15 2013-02-21 Wobben Properties Gmbh Accumulator unit for e.g. motor car, has inner plastic layer with section, where inner plastic coating in section is removed so that inner section of aluminum layer is exposed, and electrode is electrically contacted with exposed section
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