US 11,705,610 B2
End cover assembly, battery cell, degassing method, battery, and electric apparatus
Quankun Li, Liyang (CN); and Wenwei Chen, Liyang (CN)
Assigned to JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Liyang (CN)
Filed by JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Liyang (CN)
Filed on Jul. 25, 2022, as Appl. No. 17/872,181.
Application 17/872,181 is a continuation of application No. PCT/CN2021/073160, filed on Jan. 21, 2021.
Claims priority of application No. 202011276284.9 (CN), filed on Nov. 16, 2020.
Prior Publication US 2022/0359963 A1, Nov. 10, 2022
Int. Cl. H01M 50/591 (2021.01); H01M 50/358 (2021.01); H01M 50/325 (2021.01); H01M 50/367 (2021.01); H01M 50/30 (2021.01); H01M 50/35 (2021.01); H01M 50/15 (2021.01); H01M 10/052 (2010.01); H01M 50/392 (2021.01)
CPC H01M 50/591 (2021.01) [H01M 50/358 (2021.01); H01M 50/325 (2021.01)] 13 Claims
OG exemplary drawing
 
1. An end cover assembly of a battery cell, configured to seal a housing of the battery cell, and comprising:
an end cover plate provided with a degassing hole, wherein the degassing hole penetrates through the end cover plate along an axial direction of the degassing hole; and
a degassing apparatus mounted in the degassing hole, wherein the degassing apparatus comprises a columnar portion, a first limiting portion, a second limiting portion, a first elastic member, and a second elastic member, the columnar portion penetrates through the degassing hole, the first limiting portion and the second limiting portion surround an outer peripheral surface of the columnar portion and are respectively located on an outer side and an inner side of the end cover plate along the axial direction of the degassing hole, the first elastic member is located between the first limiting portion and the end cover plate, and the second elastic member is located between the second limiting portion and the end cover plate; and
when the degassing apparatus is in a normal state, the second elastic member is in sealed contact with the second limiting portion and the end cover plate, keeping the degassing hole in a sealed state; or when the degassing apparatus experiences a force toward the end cover plate, the first limiting portion and the second limiting portion are configured to produce same displacement, and the first elastic member is at least partially compressed and the second elastic member is at least partially released to undo sealing of the degassing hole by the second elastic member, allowing gas to circulate between the inside and the outside of the housing through the degassing hole.