CN115104222A - 一种电极组件及包含其的电化学装置和电子装置 - Google Patents

一种电极组件及包含其的电化学装置和电子装置 Download PDF

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CN115104222A
CN115104222A CN202080095941.1A CN202080095941A CN115104222A CN 115104222 A CN115104222 A CN 115104222A CN 202080095941 A CN202080095941 A CN 202080095941A CN 115104222 A CN115104222 A CN 115104222A
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electrode assembly
corner region
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CN115104222B (zh
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黄亮
魏红梅
张益博
胡乔舒
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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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • 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

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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)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Separators (AREA)

Abstract

一种电极组件，其包括电极极片和隔离层(3)，所述电极极片具有极耳(6)，所述隔离层(3)包含纳米纤维多孔基体(7)，所述隔离层(3)在极耳区(8)的孔隙率α2大于其在非极耳非拐角区的孔隙率α1；所述隔离层(3)在拐角区(9)的孔径d3大于其在非极耳非拐角区的孔径d1。通过调控隔离层(3)孔隙率的不均匀分布，满足极片不同区域不同的保液量需求。通过提升极耳区(8)的保液量，实现极片不同区域具有不同的动力学性能，进而缓解析锂问题，提升锂离子电池安全性。

Description

PCT国内申请，说明书已公开。

Claims (14)

  1. PCT国内申请，权利要求书已公开。
CN202080095941.1A 2020-03-27 2020-03-27 一种电极组件及包含其的电化学装置和电子装置 Active CN115104222B (zh)

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PCT/CN2020/081798 WO2021189454A1 (zh) 2020-03-27 2020-03-27 一种电极组件及包含其的电化学装置和电子装置

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CN115104222A true CN115104222A (zh) 2022-09-23
CN115104222B CN115104222B (zh) 2023-06-13

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243122A (zh) * 2021-12-08 2022-03-25 宁德新能源科技有限公司 电化学装置及用电装置
CN114221093A (zh) * 2021-12-14 2022-03-22 珠海冠宇电池股份有限公司 一种复合隔膜和电池
CN114421094A (zh) * 2022-01-11 2022-04-29 宁德新能源科技有限公司 电化学装置及其制备方法以及电子装置
CN117083741A (zh) * 2022-01-17 2023-11-17 宁德时代新能源科技股份有限公司 隔膜及其相关的二次电池、电池模块、电池包和用电装置
CN114639800A (zh) * 2022-02-15 2022-06-17 宁德新能源科技有限公司 一种电化学装置及包括其的电子装置
CN116344741B (zh) * 2023-05-26 2023-08-08 深圳市德兰明海新能源股份有限公司 正极极片、二次电池以及用电装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04308654A (ja) * 1991-04-08 1992-10-30 Fuji Elelctrochem Co Ltd 非水電解液二次電池
JPH07320728A (ja) * 1994-05-26 1995-12-08 Shin Kobe Electric Mach Co Ltd 鉛蓄電池用正極板及びその製造方法
CN102569704A (zh) * 2010-12-21 2012-07-11 通用汽车环球科技运作有限责任公司 具有可变孔隙率的电池隔膜
CN104485481A (zh) * 2014-12-04 2015-04-01 深圳市格瑞普电池有限公司 锂离子电芯体以及带该电芯体的锂离子电池
CN107316968A (zh) * 2017-05-11 2017-11-03 东莞市赛普克电子科技有限公司 一种粘性电池隔膜及使用该隔膜的锂离子电池
CN109449373A (zh) * 2018-10-17 2019-03-08 宁德时代新能源科技股份有限公司 负极极片及电池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04308654A (ja) * 1991-04-08 1992-10-30 Fuji Elelctrochem Co Ltd 非水電解液二次電池
JPH07320728A (ja) * 1994-05-26 1995-12-08 Shin Kobe Electric Mach Co Ltd 鉛蓄電池用正極板及びその製造方法
CN102569704A (zh) * 2010-12-21 2012-07-11 通用汽车环球科技运作有限责任公司 具有可变孔隙率的电池隔膜
CN104485481A (zh) * 2014-12-04 2015-04-01 深圳市格瑞普电池有限公司 锂离子电芯体以及带该电芯体的锂离子电池
CN107316968A (zh) * 2017-05-11 2017-11-03 东莞市赛普克电子科技有限公司 一种粘性电池隔膜及使用该隔膜的锂离子电池
CN109449373A (zh) * 2018-10-17 2019-03-08 宁德时代新能源科技股份有限公司 负极极片及电池

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WO2021189454A1 (zh) 2021-09-30

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