BATTERY AND ELECTRIC DEVICE

A battery includes a battery cell and a thermal management component. The thermal management component is opposite the battery cell along a first direction and connected to a first wall of the battery cell, the first wall is a wall with a largest surface area of the battery cell, and the first direction is perpendicular to the first wall. The thermal management component includes a flow channel, and the flow channel is used for accommodating a heat exchange medium, so as to regulate a temperature of the battery cell; where the flow channel is configured to provide a swelling space for the battery cell.