WO2017158702A1 - Dispositif de stockage électrique - Google Patents

Dispositif de stockage électrique Download PDF

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Publication number
WO2017158702A1
WO2017158702A1 PCT/JP2016/058038 JP2016058038W WO2017158702A1 WO 2017158702 A1 WO2017158702 A1 WO 2017158702A1 JP 2016058038 W JP2016058038 W JP 2016058038W WO 2017158702 A1 WO2017158702 A1 WO 2017158702A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
storage device
separator
insulating tape
case
Prior art date
Application number
PCT/JP2016/058038
Other languages
English (en)
Japanese (ja)
Inventor
昌史 樋口
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to PCT/JP2016/058038 priority Critical patent/WO2017158702A1/fr
Publication of WO2017158702A1 publication Critical patent/WO2017158702A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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

Definitions

  • the present invention relates to a power storage device.
  • Patent Document 1 describes an electricity storage device having an electrode body in which a positive electrode, a separator, and a negative electrode are stacked.
  • an insulating sheet that restricts a short circuit between a metal case and an electrode body (electrode assembly) is provided on the inner wall of the case.
  • the main object of the present invention is to provide a power storage device that is less prone to short circuit defects.
  • the electricity storage device includes a rectangular parallelepiped metal case, an electrode body, an electrolyte, a first electrode terminal, and a second electrode terminal.
  • the electrode body is arranged in the case.
  • the electrode body includes a rectangular first electrode, a rectangular second electrode, and a separator.
  • the separator is disposed between the first electrode and the second electrode.
  • the electrolyte is impregnated in the separator.
  • the 1st electrode terminal is provided in the end surface located in the one side of the length direction of a case.
  • the first electrode terminal is electrically connected to the first electrode.
  • the second electrode terminal is provided on an end surface located on one side in the length direction of the case.
  • the second electrode terminal is electrically connected to the second electrode.
  • the entire first electrode When viewed in plan, the entire first electrode is positioned on the second electrode in the length direction.
  • the electrode body is provided so as to cover the side surfaces of the first electrode, the second electrode, and the separator, and further includes an insulating tape that integrates the first electrode, the second electrode, and the separator.
  • the insulating tape is entirely covered with the insulating tape in the length direction of the side surface of the first electrode.
  • the electrode body is not easily displaced in the length direction.
  • the electrode body is easily displaced in the width direction perpendicular to the length direction. Therefore, the side surface of the electrode body and the metal case are in contact with each other and short circuit failure is likely to occur. In view of this, it is preferable to cover the entire length of the side surface of the electrode body with an insulating tape.
  • the insulating tape is provided so that the entire length of the side surface of the first electrode is covered with the insulating tape. For this reason, it is suppressed that the 1st electrode contacts a metal case. Therefore, in the electricity storage device according to the present invention, short circuit failure is unlikely to occur.
  • the electricity storage device according to the present invention further includes an adhesive layer that adheres the case and the electrode body.
  • the electricity storage device includes a first connection member that connects the first electrode and the first electrode terminal, and a second connection that connects the second electrode and the second electrode terminal. It is preferable to further include a connection member.
  • the first electrode may constitute a positive electrode
  • the second electrode may constitute a negative electrode
  • FIG. 1 is a schematic perspective view of the electricity storage device according to the first embodiment.
  • FIG. 2 is a schematic plan view of the electricity storage device according to the first embodiment.
  • 3 is a schematic cross-sectional view taken along line III-III in FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a schematic cross-sectional view of the electricity storage device according to the second embodiment.
  • FIG. 6 is a schematic cross-sectional view of the electricity storage device according to the third embodiment.
  • FIG. 7 is a schematic cross-sectional view of the electricity storage device according to the fourth embodiment.
  • FIG. 1 is a schematic perspective view of the electricity storage device according to this embodiment.
  • FIG. 2 is a schematic plan view of the electricity storage device according to this embodiment.
  • 3 is a schematic cross-sectional view taken along line III-III in FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG.
  • a power storage device 1 shown in FIGS. 1 to 4 is a power storage device including an electrolyte 4.
  • the electricity storage device 1 may be, for example, a battery such as a secondary battery or a capacitor such as an electric double layer capacitor.
  • the power storage device 1 includes a rectangular parallelepiped case 2.
  • the “cuboid shape” includes a rectangular parallelepiped shape having a shape with rounded corners in plan view.
  • Case 2 is metallic with conductivity.
  • the case 2 can be made of, for example, aluminum, stainless steel, copper, or the like.
  • an electrode body 3 is arranged inside the case 2.
  • the electrode body 3 includes a rectangular positive electrode 31, a rectangular negative electrode 32, and a separator 33.
  • the positive electrode 31 and the negative electrode 32 face each other in the stacking direction T with the separator 33 interposed therebetween.
  • a separator 33 is disposed between the positive electrode 31 and the negative electrode 32 in the stacking direction T.
  • the separator 33 insulates the positive electrode 31 and the negative electrode 32 from each other.
  • the end sides of the separators 33 adjacent to each other are connected via the positive electrode 31.
  • the two separators 33 adjacent to each other constitute a bag-shaped separator 33a.
  • the positive electrode 31 is disposed in the bag-shaped separator 33a.
  • a sheet-like separator may be provided between the positive electrode and the negative electrode.
  • the separator 33 may be fixed to the surface of the positive electrode 31 or the negative electrode 32.
  • the separator 33 may have a ninety-nine fold shape arranged between the positive electrode 31 and the negative electrode 32 while being folded.
  • the positive electrode 31 constitutes a “first electrode” and the negative electrode 32 constitutes a “second electrode”.
  • the configuration of the positive electrode 31 can be appropriately determined depending on the type of the electricity storage device 1.
  • the positive electrode 31 can be configured by a positive electrode current collector and an active material layer provided on at least one surface of the positive electrode current collector.
  • the positive electrode 31 can be constituted by a positive electrode current collector and a polarizable electrode layer provided on at least one surface of the positive electrode current collector. it can.
  • the configuration of the negative electrode 32 can be appropriately determined depending on the type of the electricity storage device 1.
  • the negative electrode 32 when the electricity storage device 1 is a secondary battery, the negative electrode 32 can be constituted by a negative electrode current collector and an active material layer provided on at least one surface of the negative electrode current collector.
  • the negative electrode 32 when the electricity storage device 1 is an electric double layer capacitor, the negative electrode 32 can be constituted by a negative electrode current collector and a polarizable electrode layer provided on at least one surface of the negative electrode current collector. it can.
  • the separator 33 can be constituted by, for example, a porous sheet having continuous holes through which ions in the electrolyte can move.
  • the separator 33 may be made of, for example, polypropylene, polyethylene, polyimide, cellulose, aramid, polyvinylidene fluoride, Teflon (registered trademark), or the like.
  • the surface of the separator 33 may be covered with a ceramic coat layer, an adhesive layer, or the like.
  • the surface of the separator 33 may have adhesiveness.
  • the separator 33 may be a single layer film made of one material, or a composite film or a multilayer film made of one kind or two or more kinds of materials.
  • the positive electrode 31 is the smallest.
  • the entire positive electrode (first electrode) 31 is located on the negative electrode (second electrode) 32 in the length direction L.
  • the negative electrode 32 extends to the outside of the positive electrode 31 on both sides in the length direction L, and the negative electrode 32 extends to the outside of the positive electrode 31 on both sides in the width direction W. .
  • the positive electrode 31, the separator 33, the negative electrode 32, and the separator 33 are laminated a plurality of times in this order.
  • the electrode body 3 is constituted by the laminated body 70 and the insulating tape 5 of the plurality of positive electrodes 31, the plurality of separators 33, and the plurality of negative electrodes 32.
  • the electrode body 3 is integrated by an insulating tape 5.
  • the insulating tape 5 is provided so as to cover the side surface of the laminate 70 of the positive electrode 31, the negative electrode 32, and the separator 33, and the laminate 70 is integrated.
  • the insulating tape 5 includes a first insulating tape 51 and a second insulating tape 52.
  • the first insulating tape 51 is provided on the W1 side of the laminated body 70.
  • the first insulating tape 51 straddles the first main surface 70a and the second main surface 70b of the multilayer body 70 via one side (W1 side) side surface in the width direction W of the multilayer body 70. It is provided.
  • the first insulating tape 51 and the first main surface 70a are joined, and the first insulating tape 51 and the second main surface 70b are joined, so that the first end is obtained. At least the distal end portion of the first end portion 33e1 is held so that at least the distal end portion of the portion 33e1 is bent toward one side (T1 side) in the stacking direction T.
  • the second insulating tape 52 is provided on the W2 side of the laminated body 70.
  • the second insulating tape 52 straddles the first main surface 70a and the second main surface 70b of the multilayer body 70 via the other side (W2 side) side surface in the width direction W of the multilayer body 70. It is provided. Since the second insulating tape 52 and the first main surface 70a are joined, and the second insulating tape 52 and the second main surface 70b are joined, the second end is obtained. At least the distal end portion of the second end portion 33e2 is held so that at least the distal end portion of the portion 33e2 is bent toward one side (T1 side) in the stacking direction T.
  • the joining method of the insulating tapes 51 and 52 and the laminated body 70 is not specifically limited.
  • the insulating tapes 51 and 52 and the laminated body 70 may be directly bonded, or may be bonded by using an adhesive to be adhesively bonded.
  • the insulating tapes 51 and 52 may be formed of an adhesive tape, and the insulating tapes 51 and 52 may be bonded to the laminate 70.
  • the insulating tapes 51 and 52 are constituted by double-sided adhesive tape, and the insulating tapes 51 and 52 are bonded to the laminate 70, and the laminate 70 and the case 2 are bonded by the insulating tapes 51 and 52. It may be fixed by. By doing so, the displacement of the stacked body 70 in the case 2 is effectively suppressed.
  • the adhesive includes an adhesive and an adhesive.
  • the adhesive tape includes an adhesive tape and an adhesive tape.
  • the insulating tape 5 may be composed of, for example, a resin tape made of polyimide, polypropylene, acrylic, etc., or a metal foil such as aluminum foil, copper foil, stainless steel foil, or nickel foil coated with an insulating layer. it can.
  • the electrode body 3 and the case 2 are joined. Specifically, the electrode body 3 is bonded and fixed to the inner surface of the case 2 with an adhesive layer 6. Thereby, it is suppressed that the inner surface of case 2 and the electrode body 3 contact.
  • the electrode body 3 is bonded to the case 2 on the upper side (T1 side) in the figure, but may be bonded to the lower side in the figure.
  • the electricity storage device 1 has a positive electrode terminal 41 and a negative electrode terminal 42.
  • the positive terminal 41 constitutes a “first electrode terminal”
  • the negative terminal 42 constitutes a “second electrode terminal”.
  • the positive electrode terminal 41 and the negative electrode terminal 42 are respectively provided on the end surface 2 a located on one side in the length direction L of the case 2.
  • the negative electrode terminal 42 is electrically connected to the negative electrode 32. Specifically, the negative electrode 32 and the negative electrode terminal 42 are electrically connected by the second connection member 62. One side portion of the second connection member 62 is connected to the negative electrode lead portion 32 a extending from the negative electrode 32, and the other side portion is connected to the negative electrode terminal 42.
  • the separator 33 is impregnated with the electrolyte 4.
  • the electrode body 3 is impregnated with the electrolyte 4.
  • the electrolyte 4 may be, for example, an electrolytic solution.
  • the electrolyte 3 can be appropriately determined according to the type of the electricity storage device 1, the characteristics required for the electricity storage device 1, the material of the positive electrode 31, the material of the negative electrode 32, and the like.
  • the positive electrode terminal 41 and the negative electrode terminal 42 are provided in the end surface 2a.
  • the stacked body 70 (see FIG. 3) is not easily displaced in the length direction L.
  • the stacked body 70 is easily displaced in the width direction W perpendicular to the length direction L. Therefore, the side surface of the laminated body 70 and the metal case 2 are in contact with each other, and short circuit failure is likely to occur. In view of this, it is considered preferable to cover the entire side surface of the laminate 70 with the insulating tape 5.
  • the present inventors have found that when the entire side surface of the laminate is covered with an insulating tape, the charge / discharge cycle characteristics of the electricity storage device are lowered. As a result of further diligent research, the present inventors have found that the cause is that the electrolyte does not flow sufficiently during charging and discharging, so that the charge / discharge cycle characteristics of the electricity storage device are low. Invented the invention.
  • the insulating tape 5 is provided so that the entire side surface of the positive electrode 31 in the length direction L is covered with the insulating tape. For this reason, it is suppressed that the positive electrode 31 contacts the metal case 2. Therefore, the electrical storage device 1 is unlikely to cause a short circuit failure.
  • the insulating tape 5 is provided such that a part of the side surface of the negative electrode 32 in the length direction L is exposed from the insulating tape 5. For this reason, the electrolyte 4 tends to flow during charging and discharging. Therefore, the electricity storage device 1 has excellent charge / discharge cycle characteristics.
  • the insulating tape 5 is entirely covered with the insulating tape in the length direction L of the side surface of the positive electrode 31, and part of the side surface of the negative electrode 32 in the length direction L is It is provided so as to be exposed from the insulating tape 5.
  • the electrical storage device 1 has excellent charge / discharge cycle characteristics, and the electrical storage device 1 is unlikely to cause a short circuit failure.
  • the electricity storage device 1 since it is not necessary to insulate the inner surface of the case, the electricity storage device 1 has a simple structure and is easy to manufacture.
  • an adhesive layer 6 that bonds the case 2 and the electrode body 3 is provided. For this reason, it is more effectively suppressed that the electrode body 3 is displaced relative to the case 2. Therefore, in the electricity storage device 1, a short circuit failure is less likely to occur.
  • the adhesive layer 6 bonds the main surface of the electrode body 3 and the inner surface of the main wall of the case 2. Therefore, displacement of the electrode body 3 relative to the case 2 is further effectively suppressed. Therefore, in the electricity storage device 1, a short circuit failure is less likely to occur.
  • FIG. 5 is a schematic cross-sectional view of an electricity storage device 1a according to the second embodiment.
  • the insulating tape 5 is composed of a plurality of tapes of the first insulating tape 51 and the second insulating tape 52 .
  • the present invention is not limited to this configuration.
  • the tape may be provided integrally.
  • the first insulating tape 51 and the second insulating tape 52 may be connected on the second main surface 70 b of the laminate 70. In this case, the number of parts constituting the power storage device 1 can be reduced. Further, the insulating tape 5 can be firmly fixed to the laminated body 70.
  • FIG. 6 is a schematic cross-sectional view of an electricity storage device 1b according to the third embodiment.
  • the insulating tape 5 may wind the laminate 70.
  • FIG. 7 is a schematic cross-sectional view of the electricity storage device according to the fourth embodiment.
  • the separator 33 adjacent in the stacking direction T via the positive electrode 31 constitutes the bag-shaped separator 33a
  • the present invention is not limited to this configuration.
  • a plurality of sheet-like separators 33 may be separately provided as shown in FIG.
  • the separator 33 may be connected to both surfaces of the positive electrode 31, for example.
  • the separator 33 may have a ninety-nine fold shape arranged between the positive electrode 31 and the negative electrode 32 while being folded.

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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)
  • Secondary Cells (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne un dispositif de stockage électrique permettant de supprimer les défaillances de court-circuit. Dans une vue en plan, la totalité d'une première électrode 31 est située au-dessus d'une seconde électrode 32 dans une direction longitudinale L. Un corps d'électrode 3 comporte en outre une bande isolante 5 disposée de manière à recouvrir une surface latérale d'un séparateur 33, la première électrode 31 et la seconde électrode 32, et intégrant le séparateur 33, la première électrode 31 et la seconde électrode 32. La totalité d'une surface latérale de la première électrode 31 dans la direction longitudinale L est recouverte par la bande isolante 5.
PCT/JP2016/058038 2016-03-14 2016-03-14 Dispositif de stockage électrique WO2017158702A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/058038 WO2017158702A1 (fr) 2016-03-14 2016-03-14 Dispositif de stockage électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/058038 WO2017158702A1 (fr) 2016-03-14 2016-03-14 Dispositif de stockage électrique

Publications (1)

Publication Number Publication Date
WO2017158702A1 true WO2017158702A1 (fr) 2017-09-21

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PCT/JP2016/058038 WO2017158702A1 (fr) 2016-03-14 2016-03-14 Dispositif de stockage électrique

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WO (1) WO2017158702A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10446328B2 (en) 2016-05-20 2019-10-15 Avx Corporation Multi-cell ultracapacitor
CN111430583A (zh) * 2020-03-31 2020-07-17 宁德新能源科技有限公司 电池
WO2021196028A1 (fr) * 2020-03-31 2021-10-07 宁德新能源科技有限公司 Batterie
US11830672B2 (en) 2016-11-23 2023-11-28 KYOCERA AVX Components Corporation Ultracapacitor for use in a solder reflow process

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007012598A (ja) * 2005-05-31 2007-01-18 Matsushita Electric Ind Co Ltd 非水電解質二次電池および電池モジュール
JP2007335307A (ja) * 2006-06-16 2007-12-27 Toshiba Battery Co Ltd 非水電解質電池
JP2012043564A (ja) * 2010-08-16 2012-03-01 Toshiba Corp 電池
WO2013051416A1 (fr) * 2011-10-07 2013-04-11 日産自動車株式会社 Dispositif électrique
WO2013111256A1 (fr) * 2012-01-23 2013-08-01 日立ビークルエナジー株式会社 Batterie secondaire
JP2013161632A (ja) * 2012-02-03 2013-08-19 Toyota Industries Corp 蓄電装置、電池用絶縁部材及び車両
JP2014041724A (ja) * 2012-08-21 2014-03-06 Toyota Industries Corp 蓄電装置、及び電極組立体の製造方法
JP2015153690A (ja) * 2014-02-18 2015-08-24 日立マクセル株式会社 非水電解質二次電池

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007012598A (ja) * 2005-05-31 2007-01-18 Matsushita Electric Ind Co Ltd 非水電解質二次電池および電池モジュール
JP2007335307A (ja) * 2006-06-16 2007-12-27 Toshiba Battery Co Ltd 非水電解質電池
JP2012043564A (ja) * 2010-08-16 2012-03-01 Toshiba Corp 電池
WO2013051416A1 (fr) * 2011-10-07 2013-04-11 日産自動車株式会社 Dispositif électrique
WO2013111256A1 (fr) * 2012-01-23 2013-08-01 日立ビークルエナジー株式会社 Batterie secondaire
JP2013161632A (ja) * 2012-02-03 2013-08-19 Toyota Industries Corp 蓄電装置、電池用絶縁部材及び車両
JP2014041724A (ja) * 2012-08-21 2014-03-06 Toyota Industries Corp 蓄電装置、及び電極組立体の製造方法
JP2015153690A (ja) * 2014-02-18 2015-08-24 日立マクセル株式会社 非水電解質二次電池

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10446328B2 (en) 2016-05-20 2019-10-15 Avx Corporation Multi-cell ultracapacitor
US11830672B2 (en) 2016-11-23 2023-11-28 KYOCERA AVX Components Corporation Ultracapacitor for use in a solder reflow process
CN111430583A (zh) * 2020-03-31 2020-07-17 宁德新能源科技有限公司 电池
WO2021196028A1 (fr) * 2020-03-31 2021-10-07 宁德新能源科技有限公司 Batterie
WO2021196665A1 (fr) * 2020-03-31 2021-10-07 宁德新能源科技有限公司 Batterie

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