US 12,368,201 B2
End cover assembly, battery cell, battery, power consumption device and liquid injection method
Xinxiang Chen, Fujian (CN); Yulian Zheng, Fujian (CN); Shoujun Huang, Fujian (CN); Peng Wang, Fujian (CN); and Wei Li, Fujian (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 29, 2021, as Appl. No. 17/564,989.
Application 17/564,989 is a continuation of application No. PCT/CN2020/112983, filed on Sep. 2, 2020.
Prior Publication US 2022/0131218 A1, Apr. 28, 2022
Int. Cl. H01M 50/184 (2021.01); F16J 15/06 (2006.01); F16J 15/10 (2006.01); H01M 50/15 (2021.01); H01M 50/186 (2021.01); H01M 50/645 (2021.01)
CPC H01M 50/184 (2021.01) [F16J 15/062 (2013.01); F16J 15/104 (2013.01); H01M 50/15 (2021.01); H01M 50/186 (2021.01); H01M 50/645 (2021.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An end cover assembly for a battery cell, comprising:
an end cover, provided with a first hole for injecting electrolyte;
a sealing piece, configured to seal the first hole, and comprising a sealing column inserted into the first hole; and
a cover body, configured to cover at least part of the sealing piece, the cover body being rotatable relative to the end cover to realize detachable connection between the cover body and the end cover, and separation between the cover body and the end cover being realized by rotation of the cover body,
wherein one of the sealing piece and the cover body is provided with a second hole, and the other one of the sealing piece and the cover body is provided with a boss; and the boss is configured to be inserted into the second hole, and the boss and the second hole are relatively rotatable to realize rotatable connection between the sealing piece and the cover body; and
wherein the sealing column is a non-rotating body and a shape of the first hole is fitted with the sealing piece; or the sealing column is in interference fit with the first hole, the boss is in interference fit with the second hole, and a friction coefficient of a contact surface between the sealing column and the first hole is greater than a friction coefficient of a contact surface between the boss and the second hole;
wherein the end cover is provided with a second accommodating portion arranged in a circumferential direction of the first hole, the second accommodating portion is located on one side of the end cover away from an inner portion the battery cell; the cover body comprises a limiting portion; when the cover body rotates to a first position, the limiting portion is located in the second accommodating portion to limit separation between the cover body and the end cover; and when the cover body rotates to a second position, the limiting portion and the second accommodating portion are staggered in a circumferential direction of the first hole to realize separation between the cover body and the end cover; the boss and the second hole are configured to be relatively rotatable at least during the process that the cover body rotates from the first position to the second position.