US 11,955,649 B2
Cover plate assembly for lithium ion battery and energy storage device
Guo Chen, Jiangsu (CN); Jiawen Luo, Jiangsu (CN); and Yunfeng Xue, Jiangsu (CN)
Assigned to CHANGZHOU MICROBAT TECHNOLOGY CO. LTD., Jiangsu (CN)
Appl. No. 17/254,663
Filed by ChangZhou Microbat Technology Co. Ltd., Jiangsu (CN)
PCT Filed Apr. 17, 2019, PCT No. PCT/CN2019/082961
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2020/199248, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 201910272357.8 (CN), filed on Apr. 4, 2019; and application No. 201920460119.5 (CN), filed on Apr. 4, 2019.
Prior Publication US 2021/0151825 A1, May 20, 2021
Int. Cl. H01M 50/148 (2021.01); H01M 10/0525 (2010.01); H01M 50/103 (2021.01); H01M 50/107 (2021.01); H01M 50/147 (2021.01); H01M 50/157 (2021.01); H01M 50/176 (2021.01); H01M 50/179 (2021.01); H01M 50/586 (2021.01)
CPC H01M 50/148 (2021.01) [H01M 10/0525 (2013.01); H01M 50/107 (2021.01); H01M 50/147 (2021.01); H01M 50/157 (2021.01); H01M 50/179 (2021.01); H01M 50/103 (2021.01); H01M 50/176 (2021.01); H01M 50/586 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A cover plate assembly for a lithium ion battery, comprising:
a cover plate body, provided at a middle portion thereof with a through hole which extends to a tube body, wherein the tube body protrudes from at least one surface of the cover plate body;
a pressure relief portion, located in the tube body and is in sealed communication with the tube body, the pressure relief portion is ring-shaped and is configured to crack and split from the cover plate body in response to deformation of the cover plate body; and
a central conductor, embraced by the pressure relief portion and runs through the pressure relief portion in an axial direction,
wherein the tube body protrudes from one of the surfaces of the cover plate body, the other surface is flush, and wherein the cover plate body, the pressure relief portion and the central conductor are flush at their respective sides away from the tube body.