公开(公告)号：US20220320677A1

公开(公告)日：2022-10-06

申请号：US17842622

申请日：2022-06-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qiang GUO ,  Zhenhua LI ,  Xinzhan WU ,  Jiawei XU ,  Qingsong XIE ,  Haizu JIN

IPC: H01M50/342 ,  H01M50/375 ,  H01M50/218 ,  H01M50/249

Abstract: The embodiments of the application provide a battery cell and a manufacturing method and system therefor, a battery and an electric device. An end cover assembly includes: a battery box including a first wall and a pressure relief mechanism; and a protective member positioned on an outer side of the first wall and including a body portion, a shielding portion and a weak portion. The shielding portion can block emissions released from other battery cells, so as to reduce risk of melt-through of the pressure relief mechanism caused by the emissions. When thermal runaway occurs in the battery cell, the weak portion is broken under the action of a high-temperature and high-pressure substance, such that the high-temperature and high-pressure substance are discharged in time.

公开(公告)号：US20230335743A1

公开(公告)日：2023-10-19

申请号：US18333255

申请日：2023-06-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenhua LI ,  Xinzhan WU ,  Qiang GUO ,  Xiayi WU ,  Hanli FU ,  Ziyu YANG ,  Xing LI ,  Shaojun NIU ,  Haizu JIN

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/04

CPC classification number: H01M4/624 ,  H01M10/0525 ,  H01M4/0404 ,  H01M2004/028

Abstract: A positive electrode composite material for a lithium ion secondary battery includes a positive electrode active material and a positive electrode additive. The positive electrode additive includes at least one of oxides, sulphides, peroxides, azides, or oxycarbides of sodium or potassium.