CN112272878A - 电芯及电池 - Google Patents

电芯及电池 Download PDF

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Publication number
CN112272878A
CN112272878A CN201880094577.XA CN201880094577A CN112272878A CN 112272878 A CN112272878 A CN 112272878A CN 201880094577 A CN201880094577 A CN 201880094577A CN 112272878 A CN112272878 A CN 112272878A
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cell
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CN112272878B (zh
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董文明
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Ningde Amperex Technology Ltd
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Ningde Amperex Technology Ltd
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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
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators

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

Abstract

本发明提供一种电芯及电池，该电芯包括第一极片和第二极片，第一极片包括第一集流体和设置在第一集流体上的第一活性物质层；第二极片包括第二集流体和设置在第二集流体上的第二活性物质层；第一集流体具有从起始端到第一次发生弯折的区域的第一起始段，第二集流体具有从起始端到第一次发生弯折的区域的第二起始段；其中，第一起始段面向第二起始段的表面不设置第一活性物质层，第二起始段面向第一起始段的表面不设置第二活性物质层，且第一起始段背离第二起始段的表面设置第一活性物质层。本发明的目的在于提供一种电芯，以至少减轻电芯变形、单面膜片打皱的不良情况，提升电芯的电化学性能和安全性能。

Description

PCT国内申请，说明书已公开。

Claims (10)

  1. PCT国内申请，权利要求书已公开。
CN201880094577.XA 2018-04-17 2018-04-17 电芯及电池 Active CN112272878B (zh)

Applications Claiming Priority (1)

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PCT/CN2018/083408 WO2019200538A1 (zh) 2018-04-17 2018-04-17 电芯及电池

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CN112272878A true CN112272878A (zh) 2021-01-26
CN112272878B CN112272878B (zh) 2022-05-24

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ID=68240529

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CN201880094577.XA Active CN112272878B (zh) 2018-04-17 2018-04-17 电芯及电池

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EP (1) EP3783724A4 (zh)
CN (1) CN112272878B (zh)
WO (1) WO2019200538A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005196974A (ja) * 2003-12-26 2005-07-21 Hitachi Maxell Ltd 二次電池
JP2009289570A (ja) * 2008-05-29 2009-12-10 Sony Corp 巻回電極体、非水電解質二次電池及び巻回電極体の製造方法
CN206401456U (zh) * 2016-12-27 2017-08-11 宁德新能源科技有限公司 一种卷绕式电芯
CN206532840U (zh) * 2016-12-27 2017-09-29 宁德新能源科技有限公司 一种卷绕式电芯
CN206697567U (zh) * 2017-03-31 2017-12-01 宁德新能源科技有限公司 卷绕式电芯
CN206878126U (zh) * 2017-06-23 2018-01-12 宁德时代新能源科技股份有限公司 二次电池

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101106377B1 (ko) * 2009-07-16 2012-01-18 삼성에스디아이 주식회사 이차 전지
JP2012043753A (ja) * 2010-08-23 2012-03-01 Toyota Motor Corp リチウムイオン二次電池とその製造方法
CN205828573U (zh) * 2016-06-24 2016-12-21 宁德新能源科技有限公司 卷绕式电芯
CN107546404B (zh) * 2016-06-28 2024-04-05 宁德新能源科技有限公司 卷绕式电芯
CN106058296B (zh) * 2016-08-05 2019-02-05 东莞新能源科技有限公司 一种二次电池电芯

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005196974A (ja) * 2003-12-26 2005-07-21 Hitachi Maxell Ltd 二次電池
JP2009289570A (ja) * 2008-05-29 2009-12-10 Sony Corp 巻回電極体、非水電解質二次電池及び巻回電極体の製造方法
CN206401456U (zh) * 2016-12-27 2017-08-11 宁德新能源科技有限公司 一种卷绕式电芯
CN206532840U (zh) * 2016-12-27 2017-09-29 宁德新能源科技有限公司 一种卷绕式电芯
CN206697567U (zh) * 2017-03-31 2017-12-01 宁德新能源科技有限公司 卷绕式电芯
CN206878126U (zh) * 2017-06-23 2018-01-12 宁德时代新能源科技股份有限公司 二次电池

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Publication number Publication date
EP3783724A1 (en) 2021-02-24
CN112272878B (zh) 2022-05-24
EP3783724A4 (en) 2021-05-05
WO2019200538A1 (zh) 2019-10-24

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