BATTERY PACK

The present invention is provided with a battery pack, including a first battery module, a second battery module and a box body, where the first battery module and the second battery module are housed in the box body; the box body including a lower box body configured to support the first battery module and the second battery module, and an upper box body fitting with the lower box body. The lower box body includes a first connecting portion, and the first connecting portion is located between the first battery module and the second battery module. The upper box body includes a second connecting portion, where the first connecting portion and the second connecting portion are fixed and connected. In the battery pack of the present invention, the first connecting portion is located between the first battery module and the second battery module, and the first connecting portion and the second connecting portion are fixed and connected, such that the strength of portions between the first battery module and the second battery module of the lower box body are improved. Therefore the problem of downward deflection of the lower box body is avoided and the strength of the battery pack is improved, so that the battery pack is suitable to be fixed at the bottom of the vehicle.