JP5979148B2 - Non-aqueous electrolyte battery - Google Patents
Non-aqueous electrolyte battery Download PDFInfo
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- JP5979148B2 JP5979148B2 JP2013525724A JP2013525724A JP5979148B2 JP 5979148 B2 JP5979148 B2 JP 5979148B2 JP 2013525724 A JP2013525724 A JP 2013525724A JP 2013525724 A JP2013525724 A JP 2013525724A JP 5979148 B2 JP5979148 B2 JP 5979148B2
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 27
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- 210000005069 ears Anatomy 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000000470 constituent Substances 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 230000011218 segmentation Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
- Primary Cells (AREA)
Description
本発明は、積層された電極群が電池ケース内に収納されてなる非水電解液電池に関するものである。 The present invention relates to a non-aqueous electrolyte battery in which stacked electrode groups are housed in a battery case.
特開平８−１１５７２９号公報（特許文献１）に示された従来の非水電解液電池では、正極板と負極板がセパレータを介して積層された電極群を電池ケース内に収納する際に、電極群の構成部品の一部が破損して電池内で内部短絡が生じないようにするために、電極群を絶縁樹脂製のカバーで包んで電池ケース内に挿入する構造が採用されている。 In the conventional non-aqueous electrolyte battery disclosed in Japanese Patent Application Laid-Open No. 8-115729 (Patent Document 1), when an electrode group in which a positive electrode plate and a negative electrode plate are stacked via a separator is housed in a battery case, In order to prevent a part of the components of the electrode group from being damaged and causing an internal short circuit in the battery, a structure is adopted in which the electrode group is wrapped in an insulating resin cover and inserted into the battery case.
従来の非水電解液電池では、電極群を一枚の絶縁樹脂製シートを折り曲げて形成したカバー部材で囲むことによって、電池ケースへの挿入時における電極群の破損の発生を防止して、内部短絡を防いでいる。従来採用されている絶縁樹脂製のカバー部材は、電極群の耳部配置領域と対向する対向領域を覆う底面構成部と、耳部配置領域と対向領域との間に位置して電極群の積層方向に対向する一対の側面領域を覆う一対の側面構成部と、耳部配置領域と対向領域との間に位置し電極群の積層方向と直交する方向に対向する一対の端面領域を覆う一対の端面構成部とを備えている。そして一対の端面構成部は、一枚の絶縁樹脂シートが折り曲げられて電極群を覆う際に、組み合わされて一つの端面構成部を構成する一対の分割片によってそれぞれ構成されている。この構造では、電極群が、カバー部材の内部において、底面構成部から離れる方向にスライドする。そのため電極群を電池ケースに収納した後において、電極群を構成する複数の極板がずれたり、電極群が全体的に電池ケース内で移動することから、極板が破損したり、電極群と端子との間に無理な力が加わって、部分的な断線が発生するおそれがあった。また、従来のカバー部材は、端面構成部が一対の分割片によって構成されているものの、一対の分割片は、単に重なるだけで、相互に固定されていない。そのため電池ケースに電極群を挿入する際に、一対の分割片を確実に重ねた状態に維持しなれければならず、電極群の電池ケースへの挿入作業に手間取る問題があった。 In a conventional non-aqueous electrolyte battery, the electrode group is surrounded by a cover member formed by bending a sheet of insulating resin to prevent the electrode group from being damaged when inserted into the battery case. The short circuit is prevented. A cover member made of an insulating resin that has been conventionally used is a bottom surface configuration portion that covers a facing region that faces the ear portion placement region of the electrode group, and a stack of electrode groups that is positioned between the ear portion placement region and the facing region. A pair of side surface components covering a pair of side regions facing each other in a direction, and a pair covering a pair of end surface regions located between the ear portion placement region and the facing region and facing in a direction perpendicular to the stacking direction of the electrode group And an end surface component. And a pair of end surface structure part is each comprised by a pair of division | segmentation piece which combines and comprises one end surface structure part, when one sheet of insulating resin sheet is bent and covers an electrode group. In this structure, the electrode group slides in the direction away from the bottom surface forming portion inside the cover member. Therefore, after the electrode group is stored in the battery case, a plurality of electrode plates constituting the electrode group are displaced, or the electrode group moves in the battery case as a whole. There was a risk of partial disconnection due to excessive force applied between the terminals. In the conventional cover member, although the end surface constituting part is constituted by a pair of divided pieces, the pair of divided pieces merely overlap each other and are not fixed to each other. For this reason, when inserting the electrode group into the battery case, the pair of divided pieces must be maintained in a state of being surely stacked, and there is a problem in that it takes time to insert the electrode group into the battery case.
本発明の目的は、電極群をカバー部材で確実に囲んで、しかも電極群内の極板及び極板全体の変位を防止できる非水電解液電池を提供することにある。 An object of the present invention is to provide a non-aqueous electrolyte battery that can reliably surround an electrode group with a cover member and prevent displacement of the electrode plate in the electrode group and the entire electrode plate.
本発明の他の目的は、カバー部材によって囲まれた電極群の電池ケースへの挿入が容易な非水電解液電池を提供することにある。 Another object of the present invention is to provide a nonaqueous electrolyte battery in which an electrode group surrounded by a cover member can be easily inserted into a battery case.
本発明が改良の対象とする非水電解液電池は、正極耳部を有する複数の正極板と負極耳部を有する複数の負極板とがそれぞれセパレータを介して積層されてなる電極群と、電極群の耳部配置領域を除いて電極群の周囲を囲む絶縁樹脂製のカバー部材と、カバー部材によって囲まれた電極群が変位しないように収納される電池ケースとを備えている。電極群は、複数の正極耳部が正極耳部列を形成し、複数の負極耳部が負極耳部列を形成するように、正極耳部列と負極耳部列とが所定の間隔をあけて耳部配置領域に並んで配置されて構成されている。また、絶縁樹脂製のカバー部材は、所定の形状を有する一枚の絶縁樹脂シートが折り曲げられて構成されている。 The nonaqueous electrolyte battery to be improved by the present invention includes an electrode group in which a plurality of positive electrode plates having positive electrode ears and a plurality of negative electrode plates having negative electrode ears are laminated via separators, and an electrode A cover member made of an insulating resin surrounding the periphery of the electrode group excluding the group ear portion arrangement region, and a battery case stored so that the electrode group surrounded by the cover member is not displaced are provided. In the electrode group, the positive electrode ear row and the negative electrode ear row are spaced at a predetermined interval so that the plurality of positive electrode ear portions form a positive electrode ear row and the plurality of negative electrode ear portions form a negative electrode ear row. And arranged side by side in the ear arrangement region. The insulating resin cover member is formed by bending a single insulating resin sheet having a predetermined shape.
本発明の非水電解液電池では、カバー部材が、電極群の耳部配置領域と対向する対向領域を覆う底面構成部と、耳部配置領域と対向領域との間に位置して電極群の積層方向に対向する一対の側面領域を覆う一対の側面構成部と、耳部配置領域と対向領域との間に位置し電極群の積層方向と直交する方向に対向する一対の端面領域を覆う一対の端面構成部とを備えている。特に、本発明の非水電解液電池では、一対の側面構成部の底面構成部とつながる端部とは反対側の端部に、一対の連結片が設けられている。この一対の連結片は、一対の側面構成部を耳部配置領域の上で連結する連結構造部の少なくとも一部を構成する。連結片の形状は、電極群の形状または寸法に合わせて適宜定めることができる。一対の連結片を設けて一対の側面構成部を連結すると、カバー部材内における電極群の変位を連結構造部によって規制することができる。したがって、外部から加わる振動によって、積層された電極群内の極板が大きく変位したり、電極群が全体的に変位するのを防ぐことができる。当然のことながら、カバー部材を用いると、カバー部材の存在により、電極群を電池ケース内に収納する際に、電極群を保護することができる。さらに、電極群を電池ケース内に収納した後は、カバー部材が電極群と電池ケースとの間で絶縁性を発揮するため、電池の内部短絡を防止することができる。 In the nonaqueous electrolyte battery of the present invention, the cover member is located between the bottom surface configuration portion that covers the facing region that faces the ear portion placement region of the electrode group, and the ear portion placement region and the facing region. A pair of side surface components that cover a pair of side surface regions facing each other in the stacking direction, and a pair that covers a pair of end surface regions positioned between the ear portion placement region and the facing region and facing in a direction perpendicular to the stacking direction of the electrode group And an end face constituent part. In particular, in the non-aqueous electrolyte battery of the present invention, a pair of connecting pieces is provided at the end opposite to the end connected to the bottom surface configuration portion of the pair of side surface configuration portions. The pair of connecting pieces constitutes at least a part of a connecting structure portion that connects the pair of side surface constituent portions on the ear portion arrangement region. The shape of the connecting piece can be appropriately determined according to the shape or size of the electrode group. When a pair of connecting pieces are provided and the pair of side surface constituent parts are connected, the displacement of the electrode group in the cover member can be restricted by the connecting structure part. Therefore, it is possible to prevent the electrode plates in the stacked electrode group from being largely displaced or the entire electrode group from being displaced by the vibration applied from the outside. As a matter of course, when the cover member is used, the electrode group can be protected when the electrode group is housed in the battery case due to the presence of the cover member. Furthermore, after the electrode group is housed in the battery case, the cover member exhibits insulation between the electrode group and the battery case, so that an internal short circuit of the battery can be prevented.
一対の端面構成部は、一枚の絶縁樹脂シートが折り曲げられて電極群を覆う際に、組み合わされて一つの端面構成部を構成する一対の分割片によって構成するのが好ましい。一対の分割片の形状は任意であるが、一対の分割片にそれぞれ、嵌め合いによって両者を連結する嵌め合い構成部を形成してもよい。このような嵌め合い構成部によって一対の分割片を連結すると、接着材を用いなくても分離し難い端面構成部を簡単に構成することができる。 The pair of end surface constituent parts are preferably constituted by a pair of divided pieces that are combined to form one end surface constituent part when a single insulating resin sheet is folded to cover the electrode group. Although a shape of a pair of division | segmentation piece is arbitrary, you may form the fitting structure part which connects both by a fitting to a pair of division | segmentation piece, respectively. If a pair of division | segmentation piece is connected by such a fitting structure part, the end surface structure part which is hard to isolate | separate even if it does not use an adhesive material can be comprised easily.
嵌め合い構成部は、一対の分割片の一方に形成された１以上のスリットと、一対の分割片の他方に形成されて１以上のスリットに挿入される１以上の挿入部とから構成してもよい。このような構成を採用すると、スリットを挿入部に挿入するだけで一対の分割片同士を簡単に結合することができる。 The fitting component is composed of one or more slits formed in one of the pair of divided pieces and one or more insertion portions formed in the other of the pair of divided pieces and inserted into the one or more slits. Also good. If such a structure is employ | adopted, a pair of division | segmentation piece can be easily couple | bonded only by inserting a slit in an insertion part.
なお、電池ケースは、一面が開口するケース本体と、この該ケース本体の開口部を塞ぐ蓋部とから構成することができる。そして、カバー部材には、電池ケース内に収納された状態で、耳部配置領域と対向する電池ケースの内壁面と当接して電極群の変位を阻止するストッパ部を設けるのが好ましい。このようなストッパ部を設けると、カバー部材を介して電極群を電池ケース内に固定することができる。そのため、地震等の衝撃で非水電解液電池が転倒したり傾いたりした場合でも、電極群とカバー部材が電池ケース内で変位することを防ぐことができる。 The battery case can be constituted by a case main body that is open on one surface and a lid that closes the opening of the case main body. The cover member is preferably provided with a stopper portion that contacts the inner wall surface of the battery case facing the ear portion arrangement region and prevents displacement of the electrode group while being housed in the battery case. When such a stopper portion is provided, the electrode group can be fixed in the battery case via the cover member. Therefore, even when the nonaqueous electrolyte battery falls or tilts due to an impact such as an earthquake, the electrode group and the cover member can be prevented from being displaced in the battery case.
ストッパ部は、一対の側面構成部の反対側の端部から延びる一対の突出片から構成してもよい。ストッパ部をこのような突出片で構成すると、突出片からなるストッパ部を電池ケースの内壁面に押し当てるように、電極群を包んだカバー部材を電池ケース内に挿入するだけで、電極群を電池ケース内に簡単に固定することができる。また、このような突出片の存在によって、正極耳部列及び負極耳部列が配置される耳部配置領域を確保しながら電極群を電池ケース内に固定することができる。 You may comprise a stopper part from a pair of protrusion piece extended from the edge part on the opposite side of a pair of side surface structure part. When the stopper portion is constituted by such a protruding piece, the electrode group is simply inserted into the battery case so that the stopper portion made of the protruding piece is pressed against the inner wall surface of the battery case. It can be easily fixed in the battery case. In addition, the presence of such protruding pieces makes it possible to fix the electrode group in the battery case while securing an ear portion arrangement region in which the positive electrode ear row and the negative electrode ear row are arranged.
以下、本発明の非水電解液電池の実施の形態について詳細に説明する。図１（Ａ）は、本発明の非水電解液電池の実施の形態の一例であるリチウムイオン二次電池の斜視図であって、図１（Ａ）においては、理解を容易にするために、電池ケース全体を透明なものとして示し、かつカバー部材の一部を透明なものとして示している。また図１（Ｂ）は図１（Ａ）のリチウムイオン二次電池を構成する部材のうち電池カバーのみを示した図である。図１（Ａ）に示すリチウムイオン二次電池１は、電極群３、カバー部材５及び電池ケース７とを備え、電池ケース７にはカバー部材５で包まれた電極群３が収納されている。電池ケース７は、一面が開口した箱状のケース本体７ａと、ケース本体７ａの開口部７ｄを塞ぐ蓋部７ｂとから構成される。蓋部７ｂは、ケース本体７ａに溶着により接合される。蓋部７ｂには、開裂弁からなる安全弁７ｅが設けられている。電極群３は、正極耳部９ａを有する複数の正極板９と負極耳部１１ａを有する複数の負極板１１とをそれぞれセパレータ１３を介して積層して構成されている。複数の正極耳部９ａは、電極群３の正極耳部列３１を構成し、集電体４１を介して端子６１に接続されている。また、複数の負極耳部１１ａは、電極群３の負極耳部列３３を構成し、集電体４２を介して端子６２に接続されている。端子６１及び６２は蓋部７ｂに固定されている。本例では、電極群３の耳部配置領域３５に正極耳部列３１と負極耳部列３３とを所定の間隔をあけて並べて配置することにより電極群３が構成されている。 Hereinafter, embodiments of the nonaqueous electrolyte battery of the present invention will be described in detail. FIG. 1A is a perspective view of a lithium ion secondary battery which is an example of an embodiment of a non-aqueous electrolyte battery according to the present invention. In FIG. 1A, FIG. The entire battery case is shown as being transparent, and a part of the cover member is shown as being transparent. FIG. 1B is a diagram showing only the battery cover among the members constituting the lithium ion secondary battery of FIG. A lithium ion secondary battery 1 shown in FIG. 1A includes an electrode group 3, a cover member 5, and a battery case 7, and the electrode group 3 wrapped with the cover member 5 is accommodated in the battery case 7. . The battery case 7 includes a box-shaped case main body 7a having one open surface and a lid portion 7b that closes the opening 7d of the case main body 7a. The lid portion 7b is joined to the case body 7a by welding. The lid portion 7b is provided with a safety valve 7e made of a cleavage valve. The electrode group 3 is configured by laminating a plurality of positive electrode plates 9 having positive electrode ears 9a and a plurality of negative electrode plates 11 having negative electrode ears 11a via separators 13, respectively. The plurality of positive electrode ear portions 9 a constitutes the positive electrode ear portion row 31 of the electrode group 3 and is connected to the terminal 61 via the current collector 41. The plurality of negative electrode ears 11 a constitutes the negative electrode ear part row 33 of the electrode group 3 and is connected to the terminal 62 via the current collector 42. The terminals 61 and 62 are fixed to the lid portion 7b. In this example, the electrode group 3 is configured by arranging the positive electrode ear row 31 and the negative electrode ear row 33 side by side at a predetermined interval in the ear portion arrangement region 35 of the electrode group 3.
図２には、本例のリチウムイオン二次電池で用いるカバー部材の一例が示されている。図２に示されたカバー部材５は、絶縁樹脂製のシート（絶縁樹脂シート）が、電極群３の耳部配置領域３５を除いて電極群３の周囲を囲んで構成されている。カバー部材５は、後に詳しく説明するように所定の形状を有する一枚の絶縁樹脂シートが図２に示された破線に沿って折り曲げられて構成される。 FIG. 2 shows an example of a cover member used in the lithium ion secondary battery of this example. The cover member 5 shown in FIG. 2 is configured such that an insulating resin sheet (insulating resin sheet) surrounds the periphery of the electrode group 3 except for the ear portion arrangement region 35 of the electrode group 3. As will be described in detail later, the cover member 5 is formed by bending a single insulating resin sheet having a predetermined shape along the broken line shown in FIG.
カバー部材５は、底面構成部５１、一対の側面構成部５３及び一対の端面構成部５５とを備えている。底面構成部５１は、電極群３の耳部配置領域３５と対向する対向領域３７を覆っている。一対の側面構成部５３は、耳部配置領域３５と対向領域３７との間に位置して電極群３の積層方向に対向する一対の側面領域３８を覆っている。一対の端面構成部５５は、耳部配置領域３５と対向領域３７との間に位置し、かつ電極群３の積層方向と直交する方向に対向する一対の端面領域３９を覆っている。 The cover member 5 includes a bottom surface configuration portion 51, a pair of side surface configuration portions 53, and a pair of end surface configuration portions 55. The bottom surface forming portion 51 covers a facing region 37 that faces the ear portion placement region 35 of the electrode group 3. The pair of side surface forming parts 53 covers the pair of side surface areas 38 that are located between the ear part arrangement area 35 and the facing area 37 and that face each other in the stacking direction of the electrode group 3. The pair of end surface constituting portions 55 is located between the ear portion arrangement region 35 and the facing region 37 and covers a pair of end surface regions 39 facing in a direction orthogonal to the stacking direction of the electrode group 3.
一対の側面構成部５３は、底面構成部５１とつながる端部５３ａと、この端部５３ａとは反対側の端部５３ｂとを有し、反対側の端部５３ｂには連結構造部５７が設けられている。連結構造部５７は、耳部配置領域３５の上で一対の側面構成部５３を連結して、カバー部材５内における電極群３の変位を規制する機能を有する。具体的には、連結構造部５７は、一対の連結片５２，５４で構成されている。 The pair of side surface constituting parts 53 has an end part 53a connected to the bottom face constituting part 51 and an end part 53b opposite to the end part 53a, and a connecting structure part 57 is provided on the opposite end part 53b. It has been. The connection structure portion 57 has a function of connecting the pair of side surface configuration portions 53 on the ear portion arrangement region 35 to restrict the displacement of the electrode group 3 in the cover member 5. Specifically, the connection structure portion 57 includes a pair of connection pieces 52 and 54.
この例では、一対の連結片５２，５４のうち、連結片５２が、側面構成部５３に反対側の端部５３ｂ側から端部５３ａ側に向かって平行に切り込まれた２本のスリット５２ａ，５２ｂと、スリット５２ｂが延びる方向と直交する方向にスリット５２ｂと連続して切り込まれたスリット５２ｃとを設けることによって構成されている。また、連結片５２と同様に、連結片５４も、側面構成部５３に反対側の端部５３ｂ側から端部５３ａ側に向かって平行に切り込まれた２本のスリット５４ａ，５４ｂと、スリット５４ｂが延びる方向と直交する方向にスリット５４ｂと連続して切り込まれたスリット５４ｃとを設けることによって構成されている。図２の例では、正極耳部列３１、負極耳部列３３、集電体４１，４２及び端子６１，６２に接触しない位置に、一対の連結片５２，５４が配置されている。そして、スリット５２ｃとスリット５４ｃとを相互に係止することにより、一対の連結片５２，５４が連結される。その結果、外部から加わる振動によって積層された電極群３内の極板が大きく変位したり、電極群３が全体的に変位するのを防ぐことができる。 In this example, of the pair of connecting pieces 52, 54, the connecting piece 52 is cut in parallel from the side portion 53b toward the end 53a side from the opposite end 53b side. , 52b, and a slit 52c cut continuously with the slit 52b in a direction orthogonal to the direction in which the slit 52b extends. Similarly to the connecting piece 52, the connecting piece 54 also includes two slits 54a and 54b cut in parallel from the side portion 53b toward the end portion 53a side from the opposite end portion 53b side, and a slit. The slit 54b and the slit 54c continuously cut are provided in a direction orthogonal to the direction in which the 54b extends. In the example of FIG. 2, the pair of connecting pieces 52 and 54 are arranged at positions that do not contact the positive electrode ear row 31, the negative electrode ear row 33, the current collectors 41 and 42, and the terminals 61 and 62. And a pair of connection piece 52,54 is connected by latching the slit 52c and the slit 54c mutually. As a result, it is possible to prevent the electrode plates in the electrode group 3 stacked due to vibration applied from the outside from being greatly displaced, or the electrode group 3 from being displaced as a whole.
連結構造部を構成する一対の連結片の形状は、図２に示す連結片５２，５４の形状に限定されるものではない。例えば、図３〜６には、本発明の非水電解液電池で用いるカバー部材の他の一例として、図２の連結片と形状が異なる連結片を備える態様が示されている。なお、図３〜６のカバー部材における図２のカバー部材と共通する部分については、図２のカバー部材で付した符号の数にそれぞれ１００，２００，３００，４００の数を加えた数の符号を付して説明を省略する。図３のカバー部材１０５では、一対の連結片１５２，１５４のうち、連結片１５２に挿入部１５２ｃが設けられ、連結片１５４にはスリット１５４ｃが設けられている。この例では、挿入部１５２ｃをスリット１５４ｃに挿入することにより、一対の連結片１５２，１５４が連結されて、カバー部材１０５内で図示しない電極群の変位が規制される。また、図４のカバー部材２０５では、一対の連結片２５２，２５４のうち、連結片２５２に貫通孔２５２ｃが設けられ、連結片１５４にも貫通孔２５４ｃが設けられている。この例では、貫通孔２５２ｃ及び貫通孔２５４ｃに絶縁樹脂製のボルト（図示せず）を通して、一対の連結片２５２，２５４を固定することにより、カバー部材２０５内で図示しない電極群の変位が規制される。図６のカバー部材４０５では、一対の連結片４５２，４５４のうち、連結片４５２は、平行な２本のスリット４５２ａ，４５２ｂを備え、さらにスリット４５２ｃを有する突出部４５２ｄを備えて構成されている。また、連結片４５２と同様に、連結片４５４も、平行な２本のスリット４５４ａ，４５４ｂを備え、さらにスリット４５４ｃを有する突出部４５４ｄを備えて構成されている。この例では、スリット４５２ｃとスリット４５４ｃとを相互に係止することにより、一対の連結片４５２，４５４が連結されて、カバー部材４０５内で図示しない電極群の変位が規制される。なお図６の例の構成を採用すると、電極群を構成する電極板の積層枚数の増加に対応して、突出部４５２ｄ，４５４ｄに設けられたスリット４５２ｃ，４５４ｃが係止される。そのため、電極板の積層枚数が増加しても、連結片４５２，４５４を確実に連結することができる。 The shape of the pair of connecting pieces constituting the connecting structure portion is not limited to the shape of the connecting pieces 52 and 54 shown in FIG. For example, in FIGS. 3 to 6, as another example of the cover member used in the nonaqueous electrolyte battery of the present invention, an aspect including a connection piece having a shape different from that of the connection piece of FIG. 2 is shown. In addition, about the part which is common in the cover member of FIG. 2 in the cover member of FIGS. 3-6, the code | symbol of the number which added the number of the code | symbol attached | subjected with the cover member of FIG. 2 to the number of 100, 200, 300, 400, respectively. The description is omitted. In the cover member 105 of FIG. 3, of the pair of connecting pieces 152, 154, the connecting piece 152 is provided with an insertion portion 152 c, and the connecting piece 154 is provided with a slit 154 c. In this example, by inserting the insertion portion 152 c into the slit 154 c, the pair of connection pieces 152 and 154 are connected, and the displacement of the electrode group (not shown) is restricted in the cover member 105. In the cover member 205 in FIG. 4, of the pair of connecting pieces 252 and 254, the connecting piece 252 is provided with a through hole 252 c, and the connecting piece 154 is also provided with a through hole 254 c. In this example, a pair of connecting pieces 252 and 254 are fixed to the through-hole 252c and the through-hole 254c through insulating resin bolts (not shown), thereby restricting the displacement of an electrode group (not shown) in the cover member 205. Is done. In the cover member 405 of FIG. 6, of the pair of connection pieces 452 and 454, the connection piece 452 includes two parallel slits 452 a and 452 b, and further includes a protrusion 452 d having a slit 452 c. . Similarly to the connecting piece 452, the connecting piece 454 includes two parallel slits 454a and 454b, and further includes a protruding portion 454d having a slit 454c. In this example, the slit 452c and the slit 454c are engaged with each other, whereby the pair of connecting pieces 452 and 454 are connected, and the displacement of the electrode group (not shown) is restricted in the cover member 405. When the configuration of the example of FIG. 6 is employed, the slits 452c and 454c provided in the protrusions 452d and 454d are locked in response to an increase in the number of stacked electrode plates constituting the electrode group. Therefore, even if the number of stacked electrode plates increases, the connecting pieces 452 and 454 can be reliably connected.
図２に戻って、本例のリチウムイオン二次電池１では、一対の端面構成部５５が、一対の分割片５６，５８で構成されている。一対の分割片５６，５８は、一枚の絶縁樹脂シート５が折り曲げられて電極群３を覆う際に、分割片５６，５８が組み合わされて一つの端面構成部５５を構成する。分割片５６，５８にはそれぞれ、嵌め合いによって分割片５６，５８を連結する嵌め合い構成部が形成されている。 Returning to FIG. 2, in the lithium ion secondary battery 1 of the present example, the pair of end surface constituting portions 55 is composed of a pair of divided pieces 56 and 58. The pair of divided pieces 56 and 58 constitute one end face constituting portion 55 by combining the divided pieces 56 and 58 when the single insulating resin sheet 5 is folded to cover the electrode group 3. The division pieces 56 and 58 are formed with fitting components for connecting the division pieces 56 and 58 by fitting.
具体的には、嵌め合い構成部は、一対の分割片５６，５８のうち一方の分割片５６に形成された３つのスリット５６ａと、他方の分割片５８に形成されて３つのスリット５６ａに対応してそれぞれ挿入される３つの挿入部５８ａとから構成されている。本例では、スリット５６ａに挿入部５８ａを挿入するだけで、一対の分割片５６，５８同士が連結されて端面構成部５５が構成される。そのため、このような嵌め合い構成部（スリット５６ａ及び挿入部５８ａ）を採用すると、分割片５６，５８の接合部分の位置決めが容易で、しかも接着材を用いずに分離し難い端面構成部を備えるカバー部材を簡単に組み立てることができる。 Specifically, the fitting component corresponds to the three slits 56a formed in one divided piece 56 of the pair of divided pieces 56 and 58 and the three slits 56a formed in the other divided piece 58. The three insertion portions 58a are inserted respectively. In this example, only by inserting the insertion portion 58a into the slit 56a, the pair of split pieces 56 and 58 are connected to each other to form the end surface constituting portion 55. Therefore, when such a fitting component (slit 56a and insertion portion 58a) is employed, an end surface component that is easy to position the joining portion of the split pieces 56 and 58 and is difficult to separate without using an adhesive is provided. The cover member can be easily assembled.
なお、図５に示すカバー部材３０５及び図６に示すカバー部材４０５のように、分割片３５６，３５８及び分割片４５６，４５８を接着材により結合して、端面構成部３５５及び端面構成部４５５を構成してもよい。しかしながら、図５及び図６の例では、図２〜図４に示された嵌め合い構成部を用いないため、分割片３５６，３５８及び分割片４５６，４５８の結合強度が弱くなる点、及び分割片３５６，３５８及び分割片４５６，４５８の接合部分の位置決めが容易でない点で、図２〜図４の例に劣るものとなる。 In addition, like the cover member 305 shown in FIG. 5 and the cover member 405 shown in FIG. It may be configured. However, in the examples of FIGS. 5 and 6, since the fitting components shown in FIGS. 2 to 4 are not used, the coupling strength between the divided pieces 356 and 358 and the divided pieces 456 and 458 is weakened. It is inferior to the examples of FIGS. 2 to 4 in that it is not easy to position the joint portions of the pieces 356, 358 and the divided pieces 456, 458.
図１に示すように、カバー部材５には、ストッパ部５９が設けられている。ストッパ部５９は、電池ケース７内に収納された状態で、耳部配置領域３５と対向する電池ケース７の蓋部７ｂの内壁面７ｃと当接して、電極群３の変位を阻止する機能を有する。このようなストッパ部５９の存在により、カバー部材５を介して電極群３を電池ケース７内に確実に固定することができる。そのため、地震等の衝撃によりリチウムイオン二次電池１が転倒したり傾いたりした場合でも、電極群３とカバー部材５が電池ケース７内で変位することを防ぐことができる。 As shown in FIG. 1, the cover member 5 is provided with a stopper portion 59. The stopper portion 59 has a function of preventing displacement of the electrode group 3 by contacting the inner wall surface 7c of the lid portion 7b of the battery case 7 facing the ear portion arrangement region 35 in a state of being accommodated in the battery case 7. Have. Due to the presence of such a stopper portion 59, the electrode group 3 can be reliably fixed in the battery case 7 via the cover member 5. Therefore, even when the lithium ion secondary battery 1 falls or tilts due to an impact such as an earthquake, the electrode group 3 and the cover member 5 can be prevented from being displaced in the battery case 7.
本例では、ストッパ部５９が、一対の側面構成部５３の反対側の端部５３ｂから延びる一対の突出片として構成されている。ストッパ部５９を構成する突出片の形状は、任意である。本例では、図１（Ｂ）に示すように、ストッパ部５９が、６つの辺５９ａ〜５９ｆを有する突出片で構成されている。本例では、突出片の６つの辺５９ａ〜５９ｆが、耳部配置領域３５並びに集電体４１，４２及び端子６１，６２が配置されたエリアを囲むように、電池ケース７の内壁面７ｃに当接することによって、電極群３がカバー部材５に囲まれた状態で電池ケース７内に固定される。その結果、耳部配置領域３５を確保しながら電極群３を電池ケース７内に固定することができる。 In this example, the stopper part 59 is comprised as a pair of protrusion piece extended from the edge part 53b on the opposite side of a pair of side surface structure part 53. As shown in FIG. The shape of the protruding piece constituting the stopper portion 59 is arbitrary. In this example, as shown in FIG. 1 (B), the stopper portion 59 is formed of a protruding piece having six sides 59a to 59f. In this example, the six sides 59a to 59f of the protruding piece surround the inner wall surface 7c of the battery case 7 so as to surround the area where the ear portion arrangement region 35 and the current collectors 41 and 42 and the terminals 61 and 62 are arranged. By contacting, the electrode group 3 is fixed in the battery case 7 while being surrounded by the cover member 5. As a result, it is possible to fix the electrode group 3 in the battery case 7 while ensuring the ear placement region 35.
以上、本発明の実施の形態及び実施例について具体的に説明したが、本発明はこれらの実施の形態及び実施例に限定されるものではなく、本発明の技術的思想に基づく変更が可能であるのは勿論である。 Although the embodiments and examples of the present invention have been specifically described above, the present invention is not limited to these embodiments and examples, and modifications based on the technical idea of the present invention are possible. Of course there is.
本発明によれば、カバー部材に一対の連結片を設けて一対の側面構成部を連結することにより、カバー部材内における電極群の変位を連結構造部によって規制することができる。そのため、外部から加わる振動によって積層された電極群内の極板が大きく変位したり、電極群が全体的に変位するのを防ぐことができる。 According to the present invention, by providing a pair of connecting pieces on the cover member and connecting the pair of side surface constituent portions, the displacement of the electrode group in the cover member can be regulated by the connecting structure portion. Therefore, it is possible to prevent the electrode plates in the stacked electrode group from being greatly displaced by the vibration applied from the outside, or the entire electrode group from being displaced.
１ リチウムイオン二次電池
３ 電極群
３１ 正極耳部列
３３ 負極耳部列
３５ 耳部配置領域
３７ 対抗領域
３８ 側面領域
３９ 端面領域
５ カバー部材
５１ 底面構成部
５３ 側面構成部
５３ａ，５３ｂ 端部
５５ 端面構成部
５６，５８ 分割片
５６ａ スリット（嵌め合い構成部）
５８ａ 挿入部（嵌め合い構成部）
５７ 連結構造部
５２，５４ 連結片
５９ ストッパ部（突出片）
７ 電池ケース
７ａ ケース本体
７ｂ 蓋部
７ｃ 内壁面
９ 正極板
９ａ 正極耳部
１１ 負極板
１１ａ 負極耳部
１３ セパレータDESCRIPTION OF SYMBOLS 1 Lithium ion secondary battery 3 Electrode group 31 Positive electrode ear | edge part row 33 Negative electrode ear | edge part row | line | column 35 Ear | edge part arrangement | positioning area | region 37 Counter area | region 38 Side surface area 39 End surface area 5 Cover member 51 Bottom surface structure part 53 Side surface structure part 53a, 53b End part 55 End face component 56, 58 Split piece 56a Slit (Fitting component)
58a Insertion part (Fitting component part)
57 Connecting structure 52, 54 Connecting piece 59 Stopper (projecting piece)
7 Battery Case 7a Case Main Body 7b Lid 7c Inner Wall 9 Positive Electrode Plate 9a Positive Electrode Ear 11 Negative Electrode Plate 11a Negative Electrode Ear 13 Separator
Claims (6)
前記電極群の前記耳部配置領域を除いて、前記電極群の周囲を囲む絶縁樹脂製のカバー部材と、
前記カバー部材によって囲まれた前記電極群が変位しないように収納される電池ケースとを具備し、
前記カバー部材が所定の形状を有する一枚の絶縁樹脂シートが折り曲げられて構成されている非水電解液電池であって、
前記カバー部材は、前記電極群の前記耳部配置領域と対向する対向領域を覆う底面構成部と、前記耳部配置領域と前記対向領域との間に位置し前記電極群の積層方向に対向する一対の側面領域を覆う一対の側面構成部と、前記耳部配置領域と前記対向領域との間に位置し前記電極群の積層方向と直交する方向に対向する一対の端面領域を覆う一対の端面構成部とを備え、前記一対の側面構成部の前記底面構成部とつながる端部とは反対側の端部に、前記一対の側面構成部を前記耳部配置領域の上で連結する連結構造部の少なくとも一部を構成する一対の連結片が設けられており、
前記一対の端面構成部は、前記一枚の絶縁樹脂シートが折り曲げられて前記電極群を覆うときに、組み合わされて一つの前記端面構成部を構成する一対の分割片によって構成されており、
前記一対の分割片には、嵌め合いによって両者を連結する嵌め合い構成部がそれぞれ形成されており、
前記嵌め合い構成部は、前記一対の分割片の一方に形成された１以上のスリットと、前記一対の分割片の他方に形成されて前記１以上のスリットに挿入される１以上の挿入部とからなり、
前記電池ケースは、一面が開口するケース本体と該ケース本体の開口部を塞ぐ蓋部とから構成され、
前記カバー部材は、前記電池ケース内に収納された状態で、前記耳部配置領域と対向する前記電池ケースの前記蓋部の内壁面と当接して前記電極群の変位を阻止するストッパ部を備えており、
前記ストッパ部は、前記一対の側面構成部の前記反対側の端部から延びる一対の突出片からなることを特徴とする非水電解液電池。A plurality of positive electrode plates having positive electrode ears and a plurality of negative electrode plates having negative electrode ears include a plurality of positive electrode ears forming a positive electrode ear column and a plurality of negative electrode ears forming a negative electrode ear column. As described above, an electrode group that is stacked via a separator, and the positive electrode ear row and the negative electrode ear row are arranged side by side in the ear portion arrangement region at a predetermined interval;
A cover member made of an insulating resin that surrounds the periphery of the electrode group, excluding the ear portion arrangement region of the electrode group;
A battery case accommodated so that the electrode group surrounded by the cover member is not displaced,
A non-aqueous electrolyte battery configured by bending a single insulating resin sheet having a predetermined shape as the cover member,
The cover member is positioned between a bottom surface configuration portion that covers a facing region that faces the ear portion placement region of the electrode group, and faces the stacking direction of the electrode group between the ear portion placement region and the facing region. A pair of side surface portions that cover a pair of side surface regions, and a pair of end surfaces that cover a pair of end surface regions that are located between the ear portion placement region and the opposing region and face each other in a direction orthogonal to the stacking direction of the electrode group And a connecting structure portion that connects the pair of side surface configuration portions on the ear portion arrangement region to the end portion of the pair of side surface configuration portions opposite to the end portion connected to the bottom surface configuration portion. A pair of connecting pieces constituting at least a part of
The pair of end surface constituent portions are configured by a pair of divided pieces that are combined to form one end surface constituent portion when the one insulating resin sheet is folded to cover the electrode group,
In the pair of split pieces, fitting components that connect the two by fitting are formed, respectively.
The fitting component includes one or more slits formed in one of the pair of split pieces, and one or more insertion portions formed in the other of the pair of split pieces and inserted into the one or more slits. Consists of
The battery case is composed of a case main body that is open on one side and a lid that closes the opening of the case main body,
The cover member includes a stopper portion that comes into contact with an inner wall surface of the lid portion of the battery case facing the ear portion arrangement region and prevents displacement of the electrode group in a state of being housed in the battery case. And
The said stopper part consists of a pair of protrusion piece extended from the said edge part on the opposite side of a pair of said side surface structure part, The non-aqueous electrolyte battery characterized by the above-mentioned.
前記電極群の前記耳部配置領域を除いて、前記電極群の周囲を囲む絶縁樹脂製のカバー部材と、
前記カバー部材によって囲まれた前記電極群が変位しないように収納される電池ケースとを具備し、
前記カバー部材が所定の形状を有する一枚の絶縁樹脂シートが折り曲げられて構成されている非水電解液電池であって、
前記カバー部材は、前記電極群の前記耳部配置領域と対向する対向領域を覆う底面構成部と、前記耳部配置領域と前記対向領域との間に位置し前記電極群の積層方向に対向する一対の側面領域を覆う一対の側面構成部と、前記耳部配置領域と前記対向領域との間に位置し前記電極群の積層方向と直交する方向に対向する一対の端面領域を覆う一対の端面構成部とを備え、前記一対の側面構成部の前記底面構成部とつながる端部とは反対側の端部に、前記一対の側面構成部を前記耳部配置領域の上で連結する連結構造部の少なくとも一部を構成する一対の連結片が設けられていることを特徴とする非水電解液電池。A plurality of positive electrode plates having positive electrode ears and a plurality of negative electrode plates having negative electrode ears include a plurality of positive electrode ears forming a positive electrode ear column and a plurality of negative electrode ears forming a negative electrode ear column. As described above, an electrode group that is stacked via a separator, and the positive electrode ear row and the negative electrode ear row are arranged side by side in the ear portion arrangement region at a predetermined interval;
A cover member made of an insulating resin that surrounds the periphery of the electrode group, excluding the ear portion arrangement region of the electrode group;
A battery case accommodated so that the electrode group surrounded by the cover member is not displaced,
A non-aqueous electrolyte battery configured by bending a single insulating resin sheet having a predetermined shape as the cover member,
The cover member is positioned between a bottom surface configuration portion that covers a facing region that faces the ear portion placement region of the electrode group, and faces the stacking direction of the electrode group between the ear portion placement region and the facing region. A pair of side surface portions that cover a pair of side surface regions, and a pair of end surfaces that cover a pair of end surface regions that are located between the ear portion placement region and the opposing region and face each other in a direction orthogonal to the stacking direction of the electrode group And a connecting structure portion that connects the pair of side surface configuration portions on the ear portion arrangement region to the end portion of the pair of side surface configuration portions opposite to the end portion connected to the bottom surface configuration portion. A non-aqueous electrolyte battery characterized in that a pair of connecting pieces constituting at least a part of the battery is provided.
前記一対の分割片には、嵌め合いによって両者を連結する嵌め合い構成部がそれぞれ形成されている請求項２に記載の非水電解液電池。The pair of end surface constituent portions are configured by a pair of divided pieces that are combined to form one end surface constituent portion when the one insulating resin sheet is folded to cover the electrode group,
The non-aqueous electrolyte battery according to claim 2, wherein the pair of divided pieces are formed with fitting components that connect the two by fitting.
前記カバー部材は、前記電池ケース内に収納された状態で、前記耳部配置領域と対向する前記電池ケースの前記蓋部の内壁面と当接して前記電極群の変位を阻止するストッパ部を備えている請求項２乃至４のいずれか１項に記載の非水電解液電池。The battery case is composed of a case main body that is open on one side and a lid that closes the opening of the case main body,
The cover member includes a stopper portion that comes into contact with an inner wall surface of the lid portion of the battery case facing the ear portion arrangement region and prevents displacement of the electrode group in a state of being housed in the battery case. The nonaqueous electrolyte battery according to any one of claims 2 to 4.
前記カバー部材は、前記電池ケース内に収納された状態で、前記耳部配置領域と対向する前記電池ケースの前記蓋部の内壁面と当接して前記電極群の変位を阻止するストッパ部を備えており、
前記ストッパ部は、前記一対の側面構成部の前記反対側の端部から延びる一対の突出片からなる請求項２乃至４のいずれか１項に記載の非水電解液電池。The battery case is composed of a case main body that is open on one side and a lid that closes the opening of the case main body.
The cover member includes a stopper portion that comes into contact with an inner wall surface of the lid portion of the battery case facing the ear portion arrangement region and prevents displacement of the electrode group in a state of being housed in the battery case. And
5. The nonaqueous electrolyte battery according to claim 2, wherein the stopper portion includes a pair of protruding pieces extending from the opposite ends of the pair of side surface constituent portions.
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|---|---|---|---|
| JP2013525724A JP5979148B2 (en) | 2011-07-26 | 2012-07-24 | Non-aqueous electrolyte battery |
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| JP2011163110 | 2011-07-26 | ||
| JP2011163110 | 2011-07-26 | ||
| PCT/JP2012/068698 WO2013015277A1 (en) | 2011-07-26 | 2012-07-24 | Nonaqueous electrolyte battery |
| JP2013525724A JP5979148B2 (en) | 2011-07-26 | 2012-07-24 | Non-aqueous electrolyte battery |
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| JP6064879B2 (en) * | 2013-12-02 | 2017-01-25 | 株式会社豊田自動織機 | Power storage device |
| JP6582489B2 (en) * | 2015-03-30 | 2019-10-02 | 三洋電機株式会社 | Square secondary battery and battery pack using the same |
| JP6596938B2 (en) * | 2015-06-02 | 2019-10-30 | 株式会社豊田自動織機 | Power storage device and method for manufacturing power storage device |
| JP6722545B2 (en) * | 2016-08-24 | 2020-07-15 | 株式会社東芝 | Insulation member and secondary battery |
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| JP5164155B2 (en) * | 2008-05-29 | 2013-03-13 | 日立マクセルエナジー株式会社 | Flat battery |
| JP2010097891A (en) * | 2008-10-20 | 2010-04-30 | Nec Tokin Corp | Stacked lithium-ion secondary battery |
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| JPWO2013015277A1 (en) | 2015-02-23 |
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