WO2011075945A1 - Noyau noyau d'électrode pour batterie à tension élevée - Google Patents

Noyau noyau d'électrode pour batterie à tension élevée Download PDF

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Publication number
WO2011075945A1
WO2011075945A1 PCT/CN2010/002050 CN2010002050W WO2011075945A1 WO 2011075945 A1 WO2011075945 A1 WO 2011075945A1 CN 2010002050 W CN2010002050 W CN 2010002050W WO 2011075945 A1 WO2011075945 A1 WO 2011075945A1
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WO
WIPO (PCT)
Prior art keywords
composite
battery
electrode
negative electrode
positive electrode
Prior art date
Application number
PCT/CN2010/002050
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English (en)
Chinese (zh)
Inventor
陈永翀
韩立
Original Assignee
中国科学院电工研究所
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Publication of WO2011075945A1 publication Critical patent/WO2011075945A1/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M10/052—Li-accumulators
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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 the field of lithium ion batteries and lithium batteries, and more particularly to a battery core of a high voltage power lithium ion battery capable of providing energy for an electric car, an electric bicycle or the like. Background technique
  • the cell of the single-power lithium-ion battery currently developed and applied is generally composed of one battery unit.
  • the working voltage platform of the battery core ranges from 3 to 4V, and the charging capacity of the battery core may be as high as one or two hundred amperes (Ah). ).
  • Ah amperes
  • For large-capacity lithium-ion batteries if there are no other safety measures or safety measures inside the battery, once a short circuit occurs inside one part, the battery will release a large amount of heat in a short time, resulting in complete failure or even failure of the single battery. Safety incidents such as explosions and explosions. Electric vehicles have very strict safety requirements for power lithium-ion batteries, which makes power lithium-ion batteries must use safer electrode materials or add additional internal battery safety measures, which limits lithium to a large extent. The performance of the ion battery also reduces the possible energy density and power density of the battery pack.
  • the existing power battery pack for electric vehicles is generally powered by a plurality of large-capacity single cells connected in series or in series and parallel.
  • the difference in capacity and internal resistance between the individual cells is inevitable, which is not only related to the uniformity of the pole piece coating, but also related to the mechanical factors of the battery manufacturing process.
  • performance differences between individual cells exist objectively throughout their life cycle. If the battery pack is powered by an external series cell, its output capacity will depend on the cell with the lowest capacity. If the capacity of one of the cells fails abnormally when the other battery capacity is normal, the entire battery will not continue to be used. The greater the number of cells in series in the power battery pack, the higher the consistency requirements for the cells, and the more difficult it is to design and control the overall battery life.
  • Patent No. 03126538.3 and CN101141010A disclose a high voltage power type lithium ion rechargeable battery, which comprises a casing filled with an electrolyte, and at least two lithium ion batteries are arranged in the casing.
  • the unit, the positive and negative electrodes of each lithium ion battery unit are connected in series to form a battery body, and are integrally packaged in a casing, and a channel for sharing the electrolyte flow is left between the battery cells.
  • this type of battery can provide a high voltage output by means of an internal series cell unit, since lithium ions can be inserted and removed between the respective series cells inside the battery through the electrolyte flowing through each other, this will deteriorate the internal series of the battery.
  • the capacity non-uniformity between the core units reduces the electrochemical performance of the battery. More seriously, the flow connection of the electrolyte between the series cell units also poses a great safety hazard.
  • the decomposition voltage of the lithium ion battery electrolyte currently used generally does not exceed 6V, when the electrolyte is distributed between the series cell units, the electric field distribution inside the battery is actually uneven, and the edge of each cell unit is The electrolyte is subjected to a much higher decomposition voltage than the electrolyte at the center of the cell, which is highly likely to cause decomposition of the electrolyte during charging and discharging of the battery, resulting in a battery safety accident.
  • the object of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a cell of a single-cell lithium ion secondary battery or a lithium secondary battery which obtains a high voltage output by an internal series battery unit method, and the present invention uses an insulating adhesive to prevent electricity.
  • the liquid or colloidal electrolyte inside the core is connected in series between the battery cells in series to improve the safety performance and energy density of the power battery, and to simplify the management system design of the battery pack.
  • the battery cell of the present invention is constructed by stacking two or more rectangular or other shaped composite electrode sheets.
  • An electron non-conductive microporous membrane having a number of not less than one layer is interposed between each of the two composite electrode sheets to separate the composite electrode sheets from each other to prevent short circuit.
  • the composite electrode sheets are filled with a liquid or colloidal electrolyte. Adjacent two composite electrode sheets Forming a battery unit, the number of series connected to the battery unit determines the output voltage of the battery unit.
  • the composite electrode sheet is a composite metal foil film, and the composite metal foil film is composed of an aluminum foil having a thickness of less than 30 ⁇ m and a copper film having a thickness of less than 20 ⁇ m.
  • the aluminum foil of the composite metal foil film is coated with a positive electrode active material and conductive.
  • the mixture of the agent and the adhesive is coated on the copper film of the composite metal foil film with a mixture of the negative electrode active material, the conductive agent and the adhesive.
  • the positive active material is a lithium-containing metal compound or a lithium-intercalable metal compound, and includes: lithium cobalt oxide (LiCo0 2 ), lithium manganese oxide (LiMn 2 0 4 ), lithium nickel manganese oxide (LiNi 1) /2 Mn 1/2 0 2 or LiM 1/2 Mn 3/2 0 4 ), lithium nickel manganese cobalt oxide (LiNi 1/3 Mn 1/3 Co 1/3 0 2 or LiNi 2/5 Mn 2/ s Co 1/s 0 2 ), lithium iron phosphate (LiFeP0 4 ), lithium manganese phosphate (LiMnP0 4 ).
  • the negative active material is lithium metal, lithium metal storage powder, lithium metal oxide storage or various carbon materials.
  • the edge of the composite electrode sheet is coated with an insulating adhesive resistant to electrolyte corrosion, and the insulating adhesive glues and fixes the edge portions of each composite electrode sheet to each other, so that the adjacent two composite electrode sheets constitute a closed battery unit, the battery
  • the liquid or colloidal electrolyte between the cells does not flow through each other, and the migration of lithium ions during charging and discharging of the battery is limited to the inside of each battery cell.
  • a plurality of said battery cells connected in series constitute a square or other shaped cell block.
  • the outer surfaces of the two outermost composite electrode sheets of the cell block are the surface positive electrode and the surface negative electrode of the cell, the surface positive electrode and the surface negative electrode of the cell are not coated with the negative electrode or the positive electrode active material, and the surface positive electrode passes through the conductive adhesive and the positive electrode set.
  • the fluid is bonded or relies on the elastic force to be in close contact with the positive current collector; the surface negative electrode is bonded to the negative current collector through the conductive adhesive or is in close contact with the negative current collector by the elastic force.
  • the surface electrode can be directly used as a current collector, which can eliminate the adhesion of the surface electrode to the current collector, but it is difficult to seal the battery unit corresponding to the surface electrode.
  • the current collector is a conductive metal foil with a tab having a thickness of less than 5 mm.
  • the battery cell of the invention is externally connected to the positive and negative poles through the poles of the two current collectors, and the electrons are input from the outside or output to the outside, and the working voltage of the battery cell is between several volts and several hundred volts.
  • the battery cell can be fixed in a plastic casing or a metal casing lined with a plastic film, and the energy is outputted in parallel by a single high voltage battery or a plurality of single high voltage batteries in parallel.
  • the present invention does not cause instantaneous large-current discharge of all the battery cells in the battery core, and only a small amount of heat is generated inside the battery core, and the battery core can even continue to be used, but only the output of the battery core.
  • the voltage platform will be reduced. Therefore, this safe battery manufacturing method provides more system choices for the design of the power battery electrode material, and the electrochemical performance of the electrode material can also be fully utilized.
  • the cell of the present invention provides a higher balance by using an internal series cell to provide a high voltage output because of the coating of the inner pole of the same cell.
  • the cutting production is closer, and the difference in capacity and internal resistance between the cells inside the cell is small.
  • FIG. 1 is a schematic structural view of an internal series high-voltage lithium ion battery cell, wherein FIG. 1a is a front view, FIG. 1b is a side view, and FIG. 1c is a schematic structural view of a composite electrode sheet, wherein: 1 composite electrode sheet, 2 micro holes Diaphragm, 3 liquid or colloidal electrolyte, 4 insulating adhesive, 5 surface positive electrode, 6 surface negative electrode, 7 positive electrode current collector, 8 positive electrode tab, 9 negative electrode current collector, 10 negative electrode tab, 11 copper film, 12 aluminum foil, 13 negative electrode active A mixture of materials, conductive agents and adhesives, a mixture of 14 positive active materials, conductive agents and adhesives.
  • the battery of the high voltage battery of the invention comprises a composite electrode sheet 1, a microporous membrane 2, a liquid or colloidal electrolyte 3, an insulating adhesive 4, a surface positive electrode 5, a surface negative electrode 6, a positive electrode current collector 7, a positive electrode tab 8, and a negative electrode set.
  • the fluid 9 and the negative electrode tab 10 are formed.
  • a plurality of composite electrode sheets 1 are stacked in series, and each of the two composite electrode sheets 1 is separated by an electron non-conductive microporous membrane 2.
  • a liquid or colloidal electrolyte 3 is injected between the composite electrode sheets 1.
  • the insulating adhesive 4 adhesively fixes and insulates the edge portions of each of the composite electrode sheets 1.
  • Fig. 1c shows the structure of the composite electrode sheet 1, as shown in Fig. 1c, the composite electrode sheet 1 is a composite metal foil film, and the composite metal foil film is composed of a composite of the aluminum foil 12 and the copper film 11, and the aluminum foil 12 in the composite metal foil film.
  • a mixture 14 coated with a positive electrode active material, a conductive agent and an adhesive is coated on the copper film 11 of the composite metal foil film with a mixture 13 of a negative electrode active material, a conductive agent and an adhesive.
  • the edge of the composite electrode sheet 1 is coated with an electrolyte corrosion-resistant insulating adhesive 4, and the insulating adhesive 4 adhesively fixes and seals the edge portions of each composite electrode sheet 1 so that the adjacent two composite electrode sheets 1 form a closed
  • the battery unit, the liquid or colloidal electrolyte between the battery cells does not flow through each other, and the migration of lithium ions during charging and discharging of the battery is limited to the inside of each battery unit.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Ce noyau d'électrode pour batterie à tension élevée est constitué de plus de deux plaques-électrodes composites (1).Chaque paire de plaques-électrodes composites (1) comportent plus d'un séparateur microporeux (2) sans conductibilité des électrons entre les plaques. L'espace entre les plaques-électrodes composites (1) est rempli d'un électrolyte liquide ou colloïdal (3). Le bord de chacune des électrodes est fixé et isolé au moyen d'un adhésif isolant (4). Deux plaques-électrodes adjacentes (1) constituent un élément. L'électrolyte liquide ou colloïdal (3) ne peut pas s'écouler entre les éléments. Une électrode positive de surface (5) et une électrode négative de surface (6) du noyau d'électrode sont connectées à un collecteur de courant d'électrode positif (7) via une languette d'électrode (8) et à un collecteur de courant d'électrode négatif (9) par une languette d'électrode négative (10), respectivement.
PCT/CN2010/002050 2009-12-25 2010-12-15 Noyau noyau d'électrode pour batterie à tension élevée WO2011075945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910243553A CN101719562A (zh) 2009-12-25 2009-12-25 一种高电压电池的电芯
CN200910243553.9 2009-12-25

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US13/516,947 A-371-Of-International US8846025B2 (en) 2009-12-18 2010-12-16 Crystal of recombinant interferon with altered spatial configuration, three-dimensional structure and uses thereof
US14/461,360 Continuation US9273109B2 (en) 2009-12-18 2014-08-15 Crystal of recombinant interferon with altered spatial configuration, three-dimensional structure and uses thereof

Publications (1)

Publication Number Publication Date
WO2011075945A1 true WO2011075945A1 (fr) 2011-06-30

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WO (1) WO2011075945A1 (fr)

Families Citing this family (22)

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Publication number Priority date Publication date Assignee Title
CN101719562A (zh) * 2009-12-25 2010-06-02 中国科学院电工研究所 一种高电压电池的电芯
CN102044694A (zh) * 2010-11-23 2011-05-04 中国科学院电工研究所 一种高电压电池
CN102420312B (zh) * 2011-11-04 2014-07-02 北京好风光储能技术有限公司 一种高电压锂离子电池、复合电极对及制备方法
CN103268928B (zh) * 2013-03-20 2015-09-23 钱志刚 双极性电池和双极性储能装置
CN104253263A (zh) * 2013-06-28 2014-12-31 富泰华工业（深圳）有限公司 三级性电池
CN104577184B (zh) * 2013-10-25 2016-09-14 北京好风光储能技术有限公司 一种高电压动力电池
CN103700807B (zh) * 2013-11-29 2016-01-06 徐敖奎 一种高电压锂离子电池及其制备方法
CN106571235B (zh) * 2015-10-08 2018-12-11 冠研（上海）专利技术有限公司 超级电容器结构
TWI676315B (zh) * 2017-10-20 2019-11-01 輝能科技股份有限公司 複合式電池芯
CN107910461A (zh) * 2017-11-09 2018-04-13 北京卫蓝新能源科技有限公司 一种二次电池、封装结构及其封装方法
WO2019169561A1 (fr) * 2018-03-06 2019-09-12 深圳前海优容科技有限公司 Élément et son procédé de fabrication, batterie et dispositif électronique
CN110364672A (zh) * 2019-06-11 2019-10-22 温州大学新材料与产业技术研究院 一种高电压的扣式电池及其制作方法
CN112701412A (zh) 2019-10-23 2021-04-23 比亚迪股份有限公司 一种电池、电池模组、电池包和电动车
CN110518156B (zh) * 2019-10-23 2020-03-20 比亚迪股份有限公司 一种锂离子电池、电池模组、电池包及汽车
CN110808405A (zh) * 2019-11-15 2020-02-18 五邑大学 一种基于叉指电极结构的锂电池
CN112952240B (zh) * 2019-11-22 2022-03-18 比亚迪股份有限公司 一种电池、电池模组、电池包及汽车
CN112886144B (zh) * 2019-11-30 2023-06-20 华为技术有限公司 一种分隔膜、电池组合及用电设备
CN111430815B (zh) * 2019-12-02 2022-11-22 蜂巢能源科技有限公司 电芯及其制备方法和应用
CN111477972A (zh) * 2020-03-13 2020-07-31 苏州宇量电池有限公司 一种电堆式锂离子电池及锂离子电池包
JP7488695B2 (ja) * 2020-05-29 2024-05-22 本田技研工業株式会社 固体電池モジュール及び固体電池セル
CN113991227A (zh) * 2021-11-19 2022-01-28 九环储能科技有限公司 储能单体、储能簇及储能装置
WO2024059970A1 (fr) * 2022-09-19 2024-03-28 宁德时代新能源科技股份有限公司 Élément de batterie, batterie et dispositif électrique

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CN1596483A (zh) * 2001-11-28 2005-03-16 法国原子能委员会 含有至少一个采用铝或铝合金导电基片的双电极的锂电化学发电器
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