END COVER ASSEMBLY, ENERGY-STORAGE APPARATUS, AND ELECTRICITY-CONSUMPTION DEVICE

An end cover assembly (100), an energy-storage apparatus, and an electricity-consumption device are provided in the present disclosure. The end cover assembly is for an energy-storage apparatus and includes a top cover (10). The top cover has a first surface and further defines a liquid-injection hole (12) extending through the first surface. The first surface (11) includes a first sub-surface (111) and a second sub-surface (113) connected to the first sub-surface, the first sub-surface is around the liquid-injection hole, the second sub-surface is around a periphery of the first sub-surface, and roughness of the first sub-surface is greater than roughness of the second sub-surface. According to the end cover assembly of the present disclosure, during welding of a sealing cap, the sealing cap can be welded to the top cover to achieve a better sealing effect, prolonging the service life of the energy-storage apparatus.