BATTERY MODULE

This application relates to the field of energy storage devices, and in particular, to a battery module, including a battery cell; a housing, where the housing includes an inner cavity for accommodating the battery cell; an output assembly, where the output assembly is electrically connected to the battery cell, and the output assembly is arranged at an outer side of the housing that faces away from the battery cell; and a module upper cover, where the module upper cover seals the inner cavity, the module upper cover includes a body and an extension, and the extension connected to the output assembly. This application resolves a problem that a module upper cover may easily get warped at an output electrode.