SECONDARY BATTERY, BATTERY PACK AND ELECTRONIC DEVICE

Abstract

A secondary battery, a battery pack, and an electronic device are provided. The secondary battery includes a housing, an electrode assembly, and a current collector. The housing includes an end wall, and an explosion-proof valve is disposed on the end wall. The electrode assembly is accommodated in the housing, and the electrode assembly includes a tab facing the end wall. The current collector is disposed between the electrode assembly and the end wall, and is electrically connected to the tab. At least one fragile part is disposed on the current collector, and the fragile part is configured to break when the internal pressure of the secondary battery exceeds a threshold value. At least part of the current collector is bent toward a direction away from the electrode assembly to reduce obstruction to a pressure relief region.

CPC Classifications