US 12,148,907 B2
Battery pack
Haizu Jin, Ningde (CN); Kaijie You, Ningde (CN); Yuepan Hou, Ningde (CN); Fei Hu, Ningde (CN); Peng Wang, Ningde (CN); and Zhenhua Li, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Appl. No. 17/418,762
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
PCT Filed Mar. 26, 2019, PCT No. PCT/CN2019/079640
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/140336, PCT Pub. Date Jul. 9, 2020.
Claims priority of application No. 201822275458.4 (CN), filed on Dec. 30, 2018.
Prior Publication US 2022/0077521 A1, Mar. 10, 2022
Int. Cl. H01M 10/6554 (2014.01); H01M 10/04 (2006.01); H01M 10/613 (2014.01); H01M 10/653 (2014.01); H01M 50/209 (2021.01); H01M 50/24 (2021.01); H01M 50/249 (2021.01); H01M 50/289 (2021.01)
CPC H01M 10/6554 (2015.04) [H01M 10/0431 (2013.01); H01M 10/613 (2015.04); H01M 10/653 (2015.04); H01M 50/209 (2021.01); H01M 50/24 (2021.01); H01M 50/249 (2021.01); H01M 50/289 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
a battery box, wherein the battery box comprises an upper cover and a lower box arranged in a vertical direction, and the upper cover and the lower box are sealed;
a plurality of battery modules, accommodated in the battery box, wherein each battery module comprises a plurality of battery cells arranged in a horizontal direction and a plurality of busbars electrically connecting the plurality of battery cells, each battery cell comprises an electrode assembly and a battery housing, the electrode assembly is accommodated in the battery housing, and the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, the battery housing comprises a cover plate, two first surfaces, and two second surfaces, the cover plate extends in the vertical direction, the two first surfaces extend in the horizontal direction and are opposite to each other in the vertical direction, the two second surfaces extend in the vertical direction and are opposite to each other in the horizontal direction, the two first surfaces are larger than the two second surfaces in area;
a cooling plate, disposed at an outer surface of the battery box and extending in the horizontal direction; and
a buffering member, disposed outside the battery box and between the cooling plate and an outer surface of the battery box and extending in the horizontal direction, wherein an elastic modulus of the buffering member is less than each of an elastic modulus of the cooling plate and an elastic modulus of the battery box;
wherein, the electrode assembly is of a wound structure and is flat; or the electrode assembly is of a laminated structure, and the first electrode plate, the separator, and the second electrode plate are stacked along the vertical direction, and outer surfaces of the electrode assembly comprises two flat surfaces that are substantially parallel to the two first surfaces of the battery housing and opposite to each other in the vertical direction.