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1. WO2020118884 - WOUND-TYPE CELL, LITHIUM ION SECONDARY BATTERY AND NEGATIVE ELECTRODE PLATE

Publication Number WO/2020/118884
Publication Date 18.06.2020
International Application No. PCT/CN2019/073980
International Filing Date 30.01.2019
IPC
H01M 4/13 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
CPC
H01M 10/0431
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
04Construction or manufacture in general
0431Cells with wound or folded electrodes
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/0587
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
058Construction or manufacture
0587of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 2004/021
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
021Physical characteristics, e.g. porosity, surface area
H01M 2004/027
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
026characterised by the polarity
027Negative electrodes
H01M 4/133
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
133Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
Applicants
  • 宁德时代新能源科技股份有限公司 CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED [CN]/[CN]
Inventors
  • 夏青 XIA, Qing
  • 刘江 LIU, Jiang
  • 王国宝 WANG, Guobao
  • 刘晓梅 LIU, Xiaomei
  • 林永寿 LIN, Yongshou
Agents
  • 北京东方亿思知识产权代理有限责任公司 BEIJING EAST IP LTD.
Priority Data
201811519433.212.12.2018CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) WOUND-TYPE CELL, LITHIUM ION SECONDARY BATTERY AND NEGATIVE ELECTRODE PLATE
(FR) CELLULE DE TYPE ENROULÉ, BATTERIE SECONDAIRE AU LITHIUM-ION, ET ÉLECTRODE PLANE NÉGATIVE
(ZH) 卷绕式电芯、锂离子二次电池及负极极片
Abstract
(EN) Disclosed are a wound-type cell, a lithium ion secondary battery and a negative electrode plate. A negative electrode plate (11) of a wound-type cell (10) comprises a negative electrode current collector (111) and negative electrode active substance layers (112) arranged on two opposite surfaces of the negative electrode current collector (111), wherein the negative electrode active substance layer (112) comprises a negative electrode active material; the two negative electrode active substance layers (112) respectively comprise, in a lengthwise direction of the negative electrode plate (11), a lone-pair region active substance layer (1121) and an opposite region active substance layer (1122) distributed in succession; and the two lone-pair region active substance layers (1121) are respectively arranged at two ends in the lengthwise direction of the negative electrode plate (11), and a first metal lithium layer (113) is arranged on a surface of one or both of the two lone-pair region active substance layers (1121), such that a first pre-embedded lithium compound is formed in one or both of the two lone-pair region active substance layers (1121). By means of the wound-type cell (10), a lithium ion secondary battery can simultaneously have a relatively high cycle performance and a relatively high storage performance.
(FR) L'invention concerne une cellule de type enroulé, une batterie secondaire au lithium-ion, et une électrode plane négative. Une électrode plane négative (11) d'une cellule de type enroulé (10) comprend un collecteur de courant d'électrode négative (111) et des couches de substance active d'électrode négative (112) disposées sur deux surfaces opposées du collecteur de courant d'électrode négative (111), la couche de substance active d'électrode négative (112) comprenant un matériau actif d'électrode négative ; les deux couches de substance active d'électrode négative (112) comprennent respectivement, dans une direction longitudinale de l'électrode plane négative (11), une couche de substance active de région de paire libre (1121) et une couche de substance active de région opposée (1122) réparties successivement ; et les deux couches de substance active de région de paire libre (1121) sont respectivement disposées au niveau de deux extrémités dans la direction longitudinale de l'électrode plane négative (11), et une première couche de lithium métallique (113) est disposée sur une surface d'au moins une couche desdites couches de substance active de région de paire libre (1121), de telle sorte qu'un premier composé de lithium pré-incorporé soit formé dans ladite couche de substance active de région de paire libre (1121). Au moyen de la cellule de type enroulé (10), une batterie secondaire au lithium-ion peut simultanément disposer d'une performance de cycle et d'une performance de stockage relativement élevées.
(ZH) 一种卷绕式电芯、锂离子二次电池及负极极片,卷绕式电芯(10)的负极极片(11)包括负极集流体(111)以及设置于负极集流体(111)相对的两个表面上的负极活性物质层(112),负极活性物质层(112)包括负极活性材料。其中,两个负极活性物质层(112)分别在负极极片(11)的长度方向上包括相继分布的孤对区活性物质层(1121)和相对区活性物质层(1122),且两个孤对区活性物质层(1121)分设于负极极片(11)的长度方向上的两端,在两个孤对区活性物质层(1121)中的一者或两者的表面设置有第一金属锂层(113),以在两个孤对区活性物质层(1121)中的一者或两者形成第一预嵌锂化合物。该卷绕式电芯(10)使得锂离子二次电池能够同时兼顾较高的循环性能及存储性能。
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