Battery, comprising: a box body; a battery module, being arranged in the box body, comprising a battery cell arrangement structure and an end plate, the battery cell arrangement structure comprises a plurality of battery cells stacked along a first direction, the end plate is arranged between an inner wall of the box body and the battery cell arrangement structure, and the end plate is fixedly connected to the battery cell arrangement structure; and wherein the box body comprises a first wall and a second wall, the second wall is connected to the first wall and extends upward, the battery module is located above the first wall, and the end plate is arranged between the second wall and the battery cell arrangement structure, the end plate comprises a first elastic support portion, and the first elastic support portion is configured to be capable of abutting against the second wall and be pressed and deformed by the battery cell arrangement structure when the battery cell arrangement structure expands, to provide expansion space for the battery cell arrangement structure, the first elastic support portion is constructed as a sheet shape structure extending obliquely upward towards the second wall; wherein the box body further comprises a pair of third walls, the pair of third walls are connected to the first wall and extend upward, the pair of third walls are arranged opposite to each other along a second direction, and the second direction intersects the first direction; and the end plate further comprises a second elastic support portion, and the second elastic support portion is configured to abut against the third wall, in order to implement a positioning of the battery module in the second direction. a box body; a battery module, being arranged in the box body, comprising a battery cell arrangement structure and an end plate, the battery cell arrangement structure comprises a plurality of battery cells stacked along a first direction, the end plate is arranged between an inner wall of the box body and the battery cell arrangement structure, and the end plate is fixedly connected to the battery cell arrangement structure; and wherein the box body comprises a first wall and a second wall, the second wall is connected to the first wall and extends upward, the battery module is located above the first wall, and the end plate is arranged between the second wall and the battery cell arrangement structure, the end plate comprises a first elastic support portion, and the first elastic support portion is configured to be capable of abutting against the second wall and be pressed and deformed by the battery cell arrangement structure when the battery cell arrangement structure expands, to provide expansion space for the battery cell arrangement structure, the first elastic support portion is constructed as a sheet shape structure extending obliquely upward towards the second wall; wherein the box body further comprises a pair of third walls, the pair of third walls are connected to the first wall and extend upward, the pair of third walls are arranged opposite to each other along a second direction, and the second direction intersects the first direction; and the end plate further comprises a second elastic support portion, and the second elastic support portion is configured to abut against the third wall, in order to implement a positioning of the battery module in the second direction.