US 12,230,810 B2
Secondary battery and apparatus containing the same
Xiaobin Dong, Ningbe (CN); Jiazheng Wang, Ningde (CN); Meng Kang, Ningde (CN); and Libing He, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 8, 2021, as Appl. No. 17/544,944.
Application 17/544,944 is a continuation of application No. PCT/CN2020/083055, filed on Apr. 2, 2020.
Prior Publication US 2022/0102788 A1, Mar. 31, 2022
Int. Cl. H01M 50/103 (2021.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01)
CPC H01M 50/103 (2021.01) [H01M 4/587 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A secondary battery, comprising an electrode assembly which comprises a cell and tabs extending from the cell, the cell comprising a negative electrode plate, the negative electrode plate comprising a negative current collector and a negative electrode film arranged on at least one surfaces of the negative current collector and comprising a negative active material,
wherein the negative active material comprises artificial graphite comprising secondary particles;
the cell satisfies 9 cm≤0.5×√a2+b2≤15 cm, and a ≤15 cm, where a is the maximum size of the cell in the direction in which the tabs extend, in cm; and b is the maximum size of the cell in a direction perpendicularly intersecting with the direction in which the tabs extend, in cm; and
the cell further satisfies 0.3≤a/b≤0.8.