Battery pack

A battery pack, comprising:

• a box body assembly, comprising a box body and a plurality of fixing beams which are fixed to the box body and divide the box body into several containing cavities;
• a plurality of battery modules, each of which comprises a plurality of battery cells and is correspondingly arranged in each containing cavity;
• and
• a plurality of restraint components, each of which comprises a limit part, a first mounting part and a second mounting part, wherein each limit part covers each battery module correspondingly, the first mounting part and the second mounting part are respectively connected on both sides of the limit part in the direction in which the plurality of fixing beams are arranged, and are fixed with the fixing beams on both sides of the corresponding battery module respectively;
• wherein, for two adjacent restraint components, the first mounting part of one restraint component and the second mounting part of the other restraint component are fixed on the same fixing beam and are overlapped in a height direction.