US 12,074,337 B2
Battery pack and transportation vehicle
Kaijie You, Ningde (CN); Yongguang Wang, Ningde (CN); Peng Wang, Ningde (CN); Xingdi Chen, Ningde (CN); Yu Tang, Ningde (CN); and Zequan Lu, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Appl. No. 16/980,316
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
PCT Filed Nov. 19, 2019, PCT No. PCT/CN2019/119354
§ 371(c)(1), (2) Date Sep. 11, 2020,
PCT Pub. No. WO2021/097644, PCT Pub. Date May 27, 2021.
Prior Publication US 2021/0249731 A1, Aug. 12, 2021
Int. Cl. H01M 50/342 (2021.01); B60L 50/60 (2019.01); H01M 50/249 (2021.01)
CPC H01M 50/3425 (2021.01) [B60L 50/60 (2019.02); H01M 50/249 (2021.01); H01M 2220/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
a box assembly;
a restraint assembly, disposed within the box assembly, wherein the restraint assembly is internally provided with an accommodating cavity, a first exhaust passage is provided between the restraint assembly and the box assembly, and the restraint assembly is provided with a communication hole which communicates the accommodating cavity with the first exhaust passage, the first exhaust passage being configured to provide an expansion space for the restraint assembly,
wherein a first gap is provided between an outer side of the restraint assembly and an inner side of the box assembly, the outer side of the restraint assembly and the inner side of the box assembly face each other along a height direction of the battery pack, and the first gap forms the first exhaust passage; and
a battery module, disposed within the accommodating cavity, the battery module comprising a plurality of battery units, each of the battery units comprising a housing and an electrode assembly disposed within the housing, wherein:
the electrode assembly comprises a wound structure, and an outer surface of the electrode assembly comprises two flat surfaces, which are oppositely disposed along a height direction of the battery unit; or
the electrode assembly comprises a laminated structure and comprises a plurality of first pole pieces and a plurality of second pole pieces, the first pole pieces and the second pole pieces being stacked along the height direction of the battery unit.