WO2013042612A1 - Accumulateur à gaine de film et accumulateur assemblé - Google Patents

Accumulateur à gaine de film et accumulateur assemblé Download PDF

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Publication number
WO2013042612A1
WO2013042612A1 PCT/JP2012/073508 JP2012073508W WO2013042612A1 WO 2013042612 A1 WO2013042612 A1 WO 2013042612A1 JP 2012073508 W JP2012073508 W JP 2012073508W WO 2013042612 A1 WO2013042612 A1 WO 2013042612A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
film
electrode tab
positive electrode
negative electrode
Prior art date
Application number
PCT/JP2012/073508
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English (en)
Japanese (ja)
Inventor
真介 榎本
Original Assignee
Ｎｅｃエナジーデバイス株式会社
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 Ｎｅｃエナジーデバイス株式会社 filed Critical Ｎｅｃエナジーデバイス株式会社
Publication of WO2013042612A1 publication Critical patent/WO2013042612A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • 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
    • H01M50/105—Pouches or flexible bags
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • 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

Definitions

  • the present invention relates to a film-clad battery in which two film-clad batteries, such as lithium-ion batteries, which are packaged with a film-shaped packaging material, are serially or in parallel.
  • Lithium ion secondary batteries are used in applications that require miniaturization and high capacity, such as power supplies for mobile devices such as mobile phones and digital cameras.
  • a film-clad battery using a film-shaped exterior material as a battery casing can be made lighter than a battery having a metal can body or the like as a casing.
  • the use of an assembled battery in which a large number of unit batteries are combined in series and in parallel is increasing as a power source requiring high voltage and high capacity for electric vehicles and power storage. For this reason, the request
  • FIG. 5 is a diagram illustrating a conventional film-clad battery
  • FIG. 5A is a front view illustrating a unit cell of the film-clad battery
  • FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked.
  • FIG. 5C is a perspective view illustrating a state in which unit cells are connected in series.
  • the unit cell 10 of the film-clad battery shown in FIG. 5A has the positive electrode tab 11 and the negative electrode tab 12 taken out from the heat-sealed portion of the film-shaped outer package 13, and each unit cell 10 has an adhesive or An adhering portion 20 for bonding an adhesive tape or the like is provided.
  • the unit cells 10 are stacked to make electrical connection in series and in parallel, and to prevent displacement between unit cells caused by vibration and impact.
  • the unit cells are fixed and integrated by the fixing portion 20 using an adhesive or a double-sided adhesive tape, and then the positive electrode tab and the negative electrode tab are bonded using the bonding piece 21.
  • the unit cells which is one less than the number of unit cells, in order to prevent the individual unit cells from shifting (see Patent Document 1).
  • the present invention is a secondary battery covered with a film-like exterior material, which is lighter than a battery in which a plurality of unit batteries are stacked and bonded together, and the manufacturing process is simple. It is an object of the present invention to provide a battery in which a plurality of battery elements are integrated and stored, and an assembled battery using the battery.
  • the partition member provided with the film-shaped exterior material which has the battery element accommodating part which accommodates these battery elements, and the non-permeability which does not permeate
  • a film outer battery comprising a positive electrode tab drawn from the battery element, a negative electrode tab, and the outer peripheral portion of the partition member are integrally sealed at a sealing portion with a film-shaped outer material, It is a film-clad battery in which a positive electrode tab and a negative electrode tab taken out from the sealing portion are connected in series or in parallel.
  • the partition member is a film-shaped packaging material.
  • the partition member has a metal plate surface coated with polypropylene or polyphenylene sulfide. It is a battery pack in which a plurality of the film-clad batteries or the film-clad battery and a battery containing a single battery element are connected to form at least one of electrical connections in parallel or in series.
  • the partition member that separates the battery elements also serves as an outer package of each battery element, and is lighter in weight and has a smaller volume than the battery in which the unit batteries are stacked. Can be reduced.
  • a plurality of battery elements are housed in one film-like exterior material, an adhesive and an adhesive tape for fixing the film-like exterior materials that prevent the unit battery from being displaced are unnecessary, and the manufacturing process is simplified.
  • the weight of the assembled battery can be reduced.
  • FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention.
  • FIG. 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line A-A ′ in FIG. 1A.
  • FIG. 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • FIG. 3 is a diagram for explaining another embodiment of the present invention.
  • 3A is a plan view
  • FIG. 3B is a cross-sectional view taken along line B-B ′ in FIG. 3A.
  • FIG. 4 is an exploded perspective view illustrating an embodiment of the film-clad battery shown in FIG.
  • FIG. 5 is a diagram for explaining a conventional film-clad battery.
  • FIG. 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line A-A ′ in FIG. 1A.
  • FIG. 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • FIG. 5A is a front view illustrating a unit battery of a film-clad battery.
  • FIG. 5B is a cross-sectional view of an assembled battery in which unit batteries of a plurality of film-clad batteries are stacked.
  • FIG. 5C is a perspective view illustrating a state in which unit batteries are directly connected.
  • FIG. 1 is a view for explaining an embodiment of the film-clad battery of the present invention.
  • 1A is a plan view
  • FIG. 1B is a cross-sectional view taken along line AA ′ in FIG. 1A.
  • 2 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • the lithium ion battery sealed with the film-like exterior material of the present invention has a lithium-manganese composite oxide, a lithium-cobalt composite oxide, and a lithium nickel.
  • the positive electrode absorbs and releases lithium ions on a positive electrode current collector made of an aluminum foil. It can be produced by forming a coating layer of a slurry containing a positive electrode active material such as a composite oxide or olivine type lithium iron phosphate and then cutting it into a predetermined shape through steps such as drying and compression.
  • the negative electrode is formed by forming a coating layer of a slurry containing a negative electrode active material such as carbon material such as graphite, which absorbs and releases lithium ions on a negative electrode current collector made of copper foil, and then performs steps such as drying and compression. Then, it can be manufactured by cutting into a predetermined shape.
  • a battery element is produced by laminating a positive electrode and a negative electrode through a separator made of a polyolefin film or the like, or a laminate of a separator / positive electrode / separator / negative electrode is laminated in a flat shape.
  • a battery element made of a wound body can be produced.
  • a positive electrode tab made of aluminum is attached to the positive electrode current collector as an external connection terminal, and a negative electrode tab made of nickel or nickel-coated copper is attached to the negative electrode current collector by resistance welding or ultrasonic bonding. Used for charging and discharging batteries.
  • the film-clad battery 10 of the present invention has a positive electrode 152 in which a positive electrode active material layer 151 is formed on the surface of the positive electrode current collector 150 in the battery element housing part 14 inside the film-shaped outer package 13.
  • battery elements 15A and 15B in which a negative electrode 156 having a negative electrode active material layer 155 formed on a negative electrode current collector 154 is stacked via a separator 157, and the battery elements 15A and 15B are electrically insulated.
  • an electrically insulating partition member 16 that is impermeable to electrolyte solution that prevents leakage current from being generated by a liquid junction through the electrolyte solution between the battery elements is disposed.
  • each of the battery elements 15 ⁇ / b> A and 15 ⁇ / b> B housed in the battery element housing portion 14 is formed by the film-shaped exterior member 13. Even if it exists in space, each battery element can be made completely independent. Therefore, a film-covered battery containing two battery elements that is not different from a battery sealed with a film-like exterior material individually. Obtainable.
  • the partition member 16 may be made of a synthetic resin material that does not allow electrolyte to pass through, or a material made of a metal material whose surface is covered with a synthetic resin layer.
  • a polyolefin member such as polypropylene, a film-like exterior material used as a battery exterior material, a plate-like body such as polyphenylene sulfide having good chemical resistance, or a metal plate such as an aluminum plate as described above.
  • a member coated with a synthetic resin material can be used. When the member which coat
  • the battery elements 15A and 15B each have the positive electrode tabs 11A and 11B taken out from one side of the outer peripheral portion, and the negative electrode tab 12A taken out from the side opposite to the side from which the positive electrode tab 11A was taken out. Yes. Further, the negative electrode tab 12B is taken out from the side opposite to the side from which the positive electrode tab 11B is taken out.
  • the center lines in the lead-out direction of the positive electrode tab 11A and the negative electrode tab 12B are arranged at an equal distance from the line passing through the center of the side from which the positive electrode tab and the negative electrode tab are taken out.
  • the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B taken out from the film-shaped exterior member 13 forming the battery element housing portion 14 are respectively covered with a sealing material 18, and the positive electrode tab and the negative electrode tab are covered.
  • the sealing property between the film-like exterior material 13 at the portion where the material is taken out is enhanced.
  • one battery element 15B will be mounted
  • an insulating partition member 16 that is impermeable to electrolyte solution is disposed on the battery element 15 ⁇ / b> B, and the other battery element 15 ⁇ / b> A is placed on the partition member 16.
  • the battery element 15A is covered with the upper battery element storage portion 14A formed by embossing on the film-shaped exterior member 13, and the outer periphery of the upper battery element storage portion 14A is replaced with the outer periphery of the lower battery element storage portion 14B, and the partition member.
  • sealing is performed by heat fusion, leaving an electrolyte injection portion (not shown) including a portion where the positive electrode tabs 11A and 11B and the negative electrode tabs 12A and 12B exist.
  • the electrolytic solution injecting portion is sealed and sealed.
  • the insulating partition member 16 in which the electrolytic solution is impermeable is disposed, so that a liquid junction due to the electrolytic solution does not occur between the battery elements.
  • the positive electrode tab 11 ⁇ / b> B and the negative electrode tab 12 ⁇ / b> A taken out from the side opposite to the positive electrode tab 11 ⁇ / b> A and the negative electrode tab 12 ⁇ / b> B serving as charge / discharge terminals are joined together to form the conductive connection portion 17.
  • the positive electrode tab 11B and the negative electrode tab 12A are located at the top and bottom because the negative electrode tab 12A is positioned at the center of the side where the positive electrode tab 11B and the positive electrode tab 11B are projected in the vertical direction. It is possible to easily form mutual conductive connection portions of the positive electrode tab 11B and the negative electrode tab 12A in the conductive connection portion 17.
  • the volumetric efficiency of the battery can be improved by folding the conductive connection portion 17 after covering with an insulating tape or the like.
  • the battery manufactured as described above has the battery element 15A and the battery element 15B connected in series, by using the positive electrode tab 11A and the negative electrode tab 12A as charge / discharge terminals, the battery having one battery element can be obtained.
  • a double series battery having a double voltage can be obtained.
  • the number of adhesion points can be reduced by half compared to the case where individual unit cells are stacked.
  • FIG. 3 is a diagram for explaining another embodiment of the present invention.
  • 3A is a plan view
  • FIG. 3B is a cross-sectional view taken along line BB ′ in FIG. 3A.
  • FIG. 4 is an exploded perspective view for explaining an embodiment of the film-clad battery shown in FIG.
  • the film-clad battery 10 of the present invention includes battery elements 15C and 15D in the battery element storage portions 14A and 14B inside the film-shaped packaging material 13, and electrically insulates the battery elements 15C and 15D.
  • a partition member 16 that prevents a leakage current from being generated due to a liquid junction formed between the battery elements by the electrolytic solution is disposed.
  • the battery elements 15C and 15D have the same shape and are mounted upside down.
  • the positive electrode tab 11C and the negative electrode tab 12C, and the positive electrode tab 11D and the negative electrode tab 12D are taken out in parallel from the same side.
  • the positive electrode tabs 11C and 11D and the negative electrode tabs 12C and 12D are attached to target positions on a line passing through the center of the side from which these tabs are taken out.
  • the partition member 16 is placed on the battery element 15D housed in the lower battery element housing portion 14D of the film-shaped exterior material, and the battery element 15C is placed on the partition member 16.
  • the negative electrode tab 12C is located on the upper part of the positive electrode tab 11D and the positive electrode tab 11C is located on the upper part of the negative electrode tab 12D, mutual connection can be facilitated. Further, since the positive electrode tab 11C and the negative electrode tab 12D are close to each other, it is preferable to prevent a short circuit from occurring by using an insulating tape or the like in a portion where the two are opposed to each other.
  • the battery of the present invention can be manufactured as follows.
  • the battery element 15D is mounted in the lower battery element storage portion 14D, and the electrolyte solution-impermeable and insulating partition member 16 is disposed above the battery element 15D.
  • the battery element 15C is disposed on the upper part of the partition member 16, the battery element 15C is covered from the upper part by the upper battery element storage part 14C, and the peripheral part of the battery element storage part and the partition member 16 are overlapped with each other.
  • 11C and 11D, and the portion where the negative electrode tabs 12C and 12D exist are heat-sealed around the battery element storage portion 14 leaving an electrolyte injection portion (not shown) to form a sealing portion.
  • the electrolytic solution injecting portion is sealed and sealed.
  • the negative electrode tab 12C and the positive electrode tab 11D are joined to each other at the conductive connection portion 17 while leaving the positive electrode tab 11C and the negative electrode tab 12D serving as charge / discharge terminals, thereby connecting the two battery elements 15C and 15D.
  • a battery connected in series is obtained.
  • an insulating and non-electrolyte partition member 16 is disposed to connect the battery element 15C and the battery element 15D. There is no leakage current due to the formation of the liquid junction.
  • the battery produced as described above has a positive electrode tab 11C and a negative electrode tab 12D as charge / discharge terminals, a series connection is formed between the battery element 15C and the battery element 15D.
  • a two-series battery having a voltage twice that of the provided battery can be manufactured.
  • the number of bonding points can be reduced by half compared to the case where individual unit cells are stacked. it can.
  • the partition member that separates the two battery elements also serves as an exterior body of the two unit batteries, and therefore, is more insulated than a two-series battery using two general unit batteries.
  • the film-like exterior materials are placed together in order to prevent the unit cells from shifting as in the case where the battery elements are individually covered with the film-like exterior material. Since an adhesive and an adhesive tape to be fixed are unnecessary, the manufacturing process is simplified and the weight can be reduced.
  • the connection is not limited to serial connection, and may be connected in parallel. By connecting in parallel, it is possible to provide a battery having the same voltage as that of a battery having a single battery element and a charge / discharge capacity of twice.
  • the battery element storage unit is not limited to storing two battery elements, and stores three or more battery elements, and a partition member is disposed between the battery elements, and the battery elements are connected in series and in parallel. A battery connected to can be provided.
  • the film-clad battery of the present invention and the assembled battery using the same are lighter than conventional film-clad batteries and can be efficiently provided with fewer processes. It is useful as a power source that requires energy.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention vise à proposer un accumulateur et un accumulateur assemblé dans lesquels une pluralité d'éléments accumulateurs sont scellés par un matériau de gainage en forme de film et sont montés soit en série, soit en parallèle. L'invention concerne un accumulateur à gaine de film, formé de : une pluralité d'éléments accumulateurs sur lesquels sont extrudés des pattes de cathode et des pattes d'anode ; un matériau de gainage en forme de film comportant une partie de logement d'éléments accumulateurs qui abrite la pluralité d'éléments accumulateurs ; et un matériau de compartiment offrant une imperméabilité, qui ne permet pas le passage de l'électrolyte, et une isolation électrique. Les pattes de cathode et les pattes d'anode qui sont extrudées sur les éléments accumulateurs et les parties circonférentielles extérieures du matériau de compartiment sont scellées d'une pièce dans des ouvertures avec le matériau de gainage en forme de film. Les pattes de cathode et les pattes d'anode qui sont extrudées à partir des ouvertures sont connectées soit en série, soit en parallèle.
PCT/JP2012/073508 2011-09-21 2012-09-13 Accumulateur à gaine de film et accumulateur assemblé WO2013042612A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-205734 2011-09-21
JP2011205734 2011-09-21

Publications (1)

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WO2013042612A1 true WO2013042612A1 (fr) 2013-03-28

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006586A (zh) * 2014-04-17 2015-10-28 乾坤科技股份有限公司 具有高能量密度及功率密度的电池装置
CN111725441A (zh) * 2019-03-22 2020-09-29 宁德新能源科技有限公司 电池封装结构
CN112119525A (zh) * 2019-01-10 2020-12-22 株式会社Lg化学 二次电池及其制造方法
JPWO2020004458A1 (ja) * 2018-06-27 2021-06-24 京セラ株式会社 電気化学セル
CN113540652A (zh) * 2020-03-30 2021-10-22 北京小米移动软件有限公司 电池及终端设备
WO2022051914A1 (fr) * 2020-09-08 2022-03-17 宁德新能源科技有限公司 Dispositif électrochimique et dispositif électronique
WO2022170998A1 (fr) * 2021-02-09 2022-08-18 荣耀终端有限公司 Batterie et dispositif électronique
EP4020648A4 (fr) * 2020-08-31 2022-10-26 Ningde Amperex Technology Limited Dispositif électrochimique et dispositif électronique le comprenant
WO2023137597A1 (fr) * 2022-01-18 2023-07-27 珠海冠宇电池股份有限公司 Batterie
WO2023184173A1 (fr) * 2022-03-29 2023-10-05 宁德新能源科技有限公司 Séparateur pour dispositif électrochimique, dispositif électrochimique et dispositif électronique
WO2024109228A1 (fr) * 2022-11-21 2024-05-30 珠海冠宇电池股份有限公司 Batterie et dispositif électronique

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JP2011233346A (ja) * 2010-04-27 2011-11-17 Tdk Corp 電気化学デバイス用外装体及び電気化学デバイス

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JP2004055153A (ja) * 2002-07-16 2004-02-19 Nissan Motor Co Ltd 積層型電池
JP2006221938A (ja) * 2005-02-09 2006-08-24 Toyota Motor Corp フィルム外装型蓄電装置
JP2007165185A (ja) * 2005-12-15 2007-06-28 Nissan Motor Co Ltd 二次電池モジュール
JP2009117759A (ja) * 2007-11-09 2009-05-28 Nec Tokin Corp 電気二重層キャパシタ
JP2011233346A (ja) * 2010-04-27 2011-11-17 Tdk Corp 電気化学デバイス用外装体及び電気化学デバイス

Cited By (16)

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Publication number Priority date Publication date Assignee Title
JP2015207558A (ja) * 2014-04-17 2015-11-19 乾坤科技股▲ふん▼有限公司 高エネルギー密度および高出力密度を有するバッテリ装置
CN105006586A (zh) * 2014-04-17 2015-10-28 乾坤科技股份有限公司 具有高能量密度及功率密度的电池装置
JPWO2020004458A1 (ja) * 2018-06-27 2021-06-24 京セラ株式会社 電気化学セル
JP7119088B2 (ja) 2018-06-27 2022-08-16 京セラ株式会社 電気化学セル
CN112119525A (zh) * 2019-01-10 2020-12-22 株式会社Lg化学 二次电池及其制造方法
US20210159535A1 (en) * 2019-01-10 2021-05-27 Lg Chem, Ltd. Secondary battery and method for manufacturing the same
EP3780217A4 (fr) * 2019-01-10 2021-07-21 Lg Chem, Ltd. Batterie secondaire et son procédé de fabrication
CN111725441A (zh) * 2019-03-22 2020-09-29 宁德新能源科技有限公司 电池封装结构
CN111725441B (zh) * 2019-03-22 2023-08-11 宁德新能源科技有限公司 电池封装结构
CN113540652A (zh) * 2020-03-30 2021-10-22 北京小米移动软件有限公司 电池及终端设备
EP4020648A4 (fr) * 2020-08-31 2022-10-26 Ningde Amperex Technology Limited Dispositif électrochimique et dispositif électronique le comprenant
WO2022051914A1 (fr) * 2020-09-08 2022-03-17 宁德新能源科技有限公司 Dispositif électrochimique et dispositif électronique
WO2022170998A1 (fr) * 2021-02-09 2022-08-18 荣耀终端有限公司 Batterie et dispositif électronique
WO2023137597A1 (fr) * 2022-01-18 2023-07-27 珠海冠宇电池股份有限公司 Batterie
WO2023184173A1 (fr) * 2022-03-29 2023-10-05 宁德新能源科技有限公司 Séparateur pour dispositif électrochimique, dispositif électrochimique et dispositif électronique
WO2024109228A1 (fr) * 2022-11-21 2024-05-30 珠海冠宇电池股份有限公司 Batterie et dispositif électronique

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