US 12,261,319 B2
Battery module, battery pack, electrical apparatus, and manufacturing method and manufacturing device of battery module
Xiaofu Xu, Ningde (CN); Yonghuang Ye, Ningde (CN); Qian Liu, Ningde (CN); Haizu Jin, Ningde (CN); and Chengdu Liang, 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 Aug. 15, 2022, as Appl. No. 17/887,644.
Application 17/887,644 is a continuation of application No. PCT/CN2020/139181, filed on Dec. 24, 2020.
Prior Publication US 2022/0393291 A1, Dec. 8, 2022
Int. Cl. H01M 50/267 (2021.01); H01M 4/583 (2010.01); H01M 10/04 (2006.01); H01M 50/209 (2021.01); H01M 50/51 (2021.01); H01M 4/02 (2006.01)
CPC H01M 50/267 (2021.01) [H01M 4/583 (2013.01); H01M 10/04 (2013.01); H01M 50/209 (2021.01); H01M 50/51 (2021.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A battery module, comprising a first-type battery cell and a second-type battery cell electrically connected at least in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical systems,
the first-type battery cell comprises N first battery cell(s),
the second-type battery cell comprises M second battery cell(s), N and M are positive integers,
the first battery cell comprises a first negative electrode plate, the second battery cell comprises a second negative electrode plate,
a ratio of a conductivity of an electrolyte solution at 25° C. of the first battery cell to a coating mass per unit area of the first negative electrode plate is denoted as M1, a ratio of a conductivity of an electrolyte solution at 25° C. of the second battery cell to a coating mass per unit area of the second negative electrode plate is denoted as M2, wherein a unit of the conductivity of the electrolyte solution is mS/cm, a unit of the coating mass per unit area is mg/cm2; and
M1 and M2 satisfy: M1>M2, and 0.08≤M1≤11, 0.03≤M2≤4.62.