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1. WO2020135808 - SECONDARY BATTERY AND BATTERY MODULE

Publication Number WO/2020/135808
Publication Date 02.07.2020
International Application No. PCT/CN2019/129622
International Filing Date 28.12.2019
IPC
H01M 2/02 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
02Cases, jackets or wrappings
H01M 2/04 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
02Cases, jackets or wrappings
04Lids or covers
H01M 2/20 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
20Current-conducting connections for cells
CPC
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 50/10
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
10Primary casings, jackets or wrappings of a single cell or a single battery
H01M 50/147
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
10Primary casings, jackets or wrappings of a single cell or a single battery
147Lids or covers
H01M 50/154
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
10Primary casings, jackets or wrappings of a single cell or a single battery
147Lids or covers
148characterised by their shape
154Lid or cover comprising an axial bore for receiving a central current collector
H01M 50/155
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
10Primary casings, jackets or wrappings of a single cell or a single battery
147Lids or covers
155characterised by the material
H01M 50/171
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
10Primary casings, jackets or wrappings of a single cell or a single battery
147Lids or covers
166characterised by the methods of assembling casings with lids
171using adhesives or sealing agents
Applicants
  • 宁德时代新能源科技股份有限公司 CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED [CN]/[CN]
Inventors
  • 金海族 JIN, Haizu
  • 史东洋 SHI, Dongyang
  • 李振华 LI, Zhenhua
  • 胡飞 HU, Fei
  • 陈宁 CHEN, Ning
Agents
  • 北京五洲洋和知识产权代理事务所(普通合伙) BEIJING WUZHOUYANGHE & PARTNERS
Priority Data
201822274288.829.12.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) SECONDARY BATTERY AND BATTERY MODULE
(FR) BATTERIE SECONDAIRE ET MODULE BATTERIE
(ZH) 二次电池以及电池模组
Abstract
(EN)
A secondary battery (10) and a battery module (20). The secondary battery (10) comprises: a housing (11) comprising an accommodation hole (11a) having an opening; a top cover component (13) sealably connected to the housing (11) to cover the opening; and an electrode component (12) provided in the accommodation hole (11a) and comprising more than two electrode units (121), the electrode unit (121) being formed by winding a first electrode plate (12a), a second electrode plate (12b), and a membrane (12c), and comprising a wide surface (121a) and a narrow surface (121b). The more than two electrode units (121) are stacked along an axial direction (Z), and the wide surface (121a) of the electrode unit (121) is provided towards the top cover component (13). The top cover component (13) and the electrode component (12) are spaced apart from each other to form a first buffer gap (14) for buffering the swelling strain of the electrode component (12) along the axial direction (Z). When the secondary battery (10) swells, the first buffer gap (14) is capable of absorbing the swelling strain, and reducing the situation that the top cover component (13) is disconnected from the housing (11) due to the excessive force experienced by the top cover component (13) so as to reduce the possibility that the secondary battery (10) becomes invalid due to the damage of the entire structure and ensure the completeness and the security of the secondary battery (10).
(FR)
L'invention concerne une batterie secondaire (10) et un module de batterie (20). La batterie secondaire (10) comprend : un boîtier (11) comprenant un trou de réception (11a) ayant une ouverture ; un composant de recouvrement supérieur (13) relié de façon étanche au boîtier (11) afin de recouvrir l'ouverture ; et un composant d'électrode (12) disposé dans le trou de réception (11a) et comprenant plus de deux unités d'électrode (121), l'unité d'électrode (121) étant formée par enroulement d'une première plaque d'électrode (12a), d'une seconde plaque d'électrode (12b), et d'une membrane (12c), et comprenant une surface large (121a) et une surface étroite (121b). Plus de deux unités d'électrode (121) sont empilées le long d'une direction axiale (Z), et la surface large (121a) de l'unité d'électrode (121) est disposée vers le composant de recouvrement supérieur (13). Le composant de recouvrement supérieur (13) et le composant d'électrode (12) sont espacés l'un de l'autre afin de former un premier espace tampon (14) permettant d'amortir la contrainte de gonflement du composant d'électrode (12) le long de la direction axiale (Z). Lorsque la batterie secondaire (10) gonfle, le premier espace tampon (14) peut absorber la contrainte de gonflement, et réduire la situation où le composant de recouvrement supérieur (13) est déconnecté du boîtier (11) en raison de la force excessive subie par le composant de recouvrement supérieur (13) de façon à réduire la possibilité que la batterie secondaire (10) devienne invalide en raison de l'endommagement de la structure entière et assurer la complétude et la sécurité de la batterie secondaire (10).
(ZH)
一种二次电池(10)以及电池模组(20),二次电池(10)包括:壳体(11),包括具有开口的容纳孔(11a);顶盖组件(13),与壳体(11)密封连接以盖闭开口;电极组件(12),设置于容纳孔(11a)内,电极组件(12)包括两个以上的电极单元(121),电极单元(121)由第一极片(12a)、第二极片(12b)和隔膜(12c)卷绕形成,且具有宽面(121a)和窄面(121b),两个以上的电极单元(121)沿轴向(Z)层叠,并且电极单元(121)的宽面(121a)朝向顶盖组件(13)设置;其中,顶盖组件(13)与电极组件(12)之间间隔设置以形成第一缓冲间隙(14),第一缓冲间隙(14)用于缓冲电极组件(12)沿轴向(Z)的膨胀变形量。上述二次电池(10)发生膨胀时,第一缓冲间隙(14)能够吸收膨胀变形量,降低顶盖组件(13)受力过大而与壳体(11)脱离连接状态,从而降低二次电池(10)因整体结构损坏而发生失效的可能性,保证二次电池(10)的结构完整性和安全性。
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