公开(公告)号：US20240313337A1

公开(公告)日：2024-09-19

申请号：US18662093

申请日：2024-05-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qineng ZHONG ,  Chengyou XING ,  Miaomiao YAN ,  Shutao SONG ,  Xiaoxi ZHANG

IPC: H01M50/342 ,  H01M50/107 ,  H01M50/152 ,  H01M50/55

CPC classification number: H01M50/3425 ,  H01M50/107 ,  H01M50/152 ,  H01M50/55

Abstract: The embodiments of the present disclosure provide an end cover, battery cell, battery, and electrical device, which belong to the field of battery technology. The end cover includes the cover body and the arc groove. The arc groove is arranged in the cover body; and the cover body is configured to crack along the arc groove to release pressure inside the battery cell when the pressure or temperature inside the battery cell reaches the threshold, wherein the depth of the arc groove gradually increases from the middle position of the arc groove to the two ends of the arc groove.

公开(公告)号：US20240266667A1

公开(公告)日：2024-08-08

申请号：US18607083

申请日：2024-03-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei LUO ,  Longfei YANG ,  Wenwei CHEN ,  Limei YANG ,  Qineng ZHONG

IPC: H01M50/342 ,  H01M10/04

CPC classification number: H01M50/3425 ,  H01M10/0404 ,  H01M10/049 ,  H01M2200/20

Abstract: A battery cell includes a casing configured to accommodate an electrode assembly, and a pressure relief mechanism disposed on the casing. The pressure relief mechanism includes a pressure relief passage, and a first pressure relief element and a second pressure relief element that are disposed on the pressure relief passage and close the pressure relief passage separately. In a venting direction of the pressure relief passage, the second pressure relief element is disposed upstream of the first pressure relief element and communicated with an internal space of the casing. The second pressure relief element has a rigidity of greater than or equal to 25 N/mm.

公开(公告)号：US20240076419A1

公开(公告)日：2024-03-07

申请号：US18489461

申请日：2023-10-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shida LI ,  Qineng ZHONG ,  Limei YANG ,  Yichen WU ,  Yifan XUE

IPC: C08F2/12 ,  C08F8/30 ,  H01M10/04

CPC classification number: C08F2/12 ,  C08F8/30 ,  H01M10/04

Abstract: A composite polyimide separator and a preparation method thereof, and a secondary battery are described. The preparation method of the composite polyimide separator comprises: providing a porous polyamic acid film; subjecting a diamine aqueous solution and an acyl chloride organic solution to an interfacial polymerization reaction on a surface of the porous polyamic acid film to obtain a composite polyamic acid separator; and placing the composite polyamic acid separator in vapor of an imidization reagent for imidization treatment to obtain the composite polyimide separator. In the present application, by controlling the parameters of the interfacial polymerization reaction, a composite polyamic acid separator with a dense surface, a loose bottom, and an adjustable surface pore size can be obtained.