US 11,901,575 B2
Battery pack and power consuming device
Tingzhen Xie, Ningde (CN); Shaocong Ouyang, Ningde (CN); Chenghua Fu, Ningde (CN); Baoyun Xu, Ningde (CN); and Yunmei Lin, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Sep. 12, 2023, as Appl. No. 18/465,172.
Application 18/465,172 is a continuation of application No. PCT/CN2022/075231, filed on Jan. 30, 2022.
Prior Publication US 2023/0420785 A1, Dec. 28, 2023
Int. Cl. H01M 50/267 (2021.01); H01M 50/209 (2021.01); H01M 50/233 (2021.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/02 (2006.01)
CPC H01M 50/267 (2021.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 50/209 (2021.01); H01M 50/233 (2021.01); H01M 2004/028 (2013.01); H01M 2200/105 (2013.01); H01M 2220/20 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A battery pack, comprising a battery pack case and a plurality of battery cells accommodated in the battery pack case, wherein
an inner space of the battery pack case may be divided into a first region located at the center and a second region enclosing the first region; and
the plurality of battery cells comprise: at least one first battery cell disposed in the first region; and at least one second battery cell disposed in the second region, wherein
an internal resistance of the first battery cell and an internal resistance of the second battery cell increase with the decrease of a temperature, and when the internal resistance of the first battery cell and the internal resistance of the second battery cell are respectively RA1 and RB1 at 25° C. and are respectively RA2 and RB2 at −20° C., 1≤RB1/RA1≤2 and 1.2≤RB2/RA2≤2.5, optionally, 1.3≤RB1/RA1≤1.6 and 1.3≤RB2/RA2≤1.7.