Battery cell, battery, electric device, and energy storage apparatus

Abstract

A battery cell includes a housing. The housing includes a first wall and a second wall, where the first wall and the second wall are welded to form a first welding zone, the first wall includes a first zone and a second zone arranged along a first direction, the first zone is arranged adjacent to the first welding zone, a thickness of the first zone is greater than a thickness of the second zone, and the first direction is parallel to a thickness direction of the second wall.

Dependencies are inferred from the claim text.