公开(公告)号：US20170365880A1

公开(公告)日：2017-12-21

申请号：US15627845

申请日：2017-06-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wujun ZOU ,  Xiaowen ZHANG ,  Haizu JIN ,  Jian DUAN ,  Weitao WANG ,  Xing LI

IPC: H01M10/0567 ,  H01M2/04 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H01M10/0567 ,  H01M2/0486 ,  H01M2/16 ,  H01M4/13 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/4235 ,  H01M10/443 ,  H01M10/445 ,  H01M2200/10 ,  H01M2200/20

Abstract: The secondary battery of the present application includes a cell, an electrolyte and a case, the cell includes electrodes and a separator. The secondary battery further includes a gas-generating additive and a water-generating additive. During the overcharging process of the Li-ion battery, when the battery reaches a certain temperature, the water-generating additive decomposes and generates a large amount of water. Then, Li salt and the gas-generating additive are induced to decompose and generate a large amount of gas, so that when the internal pressure of the battery reaches a certain value, the charging current is interrupted in advance by a device for interrupting charging current. Moreover, the water-generating additive can absorb the heat generated by the battery during decomposition, so that the internal temperature of the battery decreases, thereby preventing the overcharge failure of the battery.