END PLATE, CASE, BATTERY, ELECTRIC DEVICE, AND ASSEMBLING METHOD FOR CASE

An end plate comprises: a first plate, comprising a first connecting part, wherein the first connecting part is arranged in a closed ring along the circumferential edge of the first plate and is configured to form continuous sealing connection with an environment component; and a second plate, stacked with the first plate in a first direction, wherein the second plate comprises second connecting parts spaced along the circumferential edge of the second plate. The first connecting part of the first plate is in continuous sealing connection with the environment component and is used for sealing the position where the end plate and the environment component are connected, and the second connecting parts of the second plate are connected to the environment component respectively by means of connecting members and is used for improving the strength of connection between the end plate and the environment component.