A battery pack according to this application includes a lower support; a lower fastening member that is fastened onto the lower support and extending upwards along a height direction; an upper support plate provided above the lower fastening member; and a heat exchange plate directly fastened onto the upper support plate. In the battery pack according to this application, the heat exchange plate is directly fastened onto the upper support plate, which eliminates use of a position locking piece to position the heat exchange plate and ensures that flatness and positioning tolerance of the heat exchange plate are not affected.