ENERGY STORAGE DEVICE, WELDING METHOD FOR ENERGY STORAGE DEVICE, AND ELECTRICITY-CONSUMPTION DEVICE

This disclosure provides an energy storage device, a welding method for an energy storage device, and an electricity-consumption device. The energy storage device includes an end cap, a housing, and a current collector arranged between the end cap and the housing. The current collector includes a main body and a welding portion, and the main body and the welding portion are integrally formed. The main body has a first surface and a second surface facing away from the first surface. The end cap is connected to the first surface of the main body, the housing is connected to the second surface of the main body, and the welding portion is connected to an outer peripheral side surface of the end cap, an outer peripheral side surface of the housing, and an outer peripheral side surface of the main body.