POWER BATTERY PACK, ENERGY STORAGE DEVICE AND ELECTRIC VEHICLE

The present disclosure relates to a power battery pack, an energy storage device, an electric vehicle. The power battery pack includes an accommodating device (200) and a plurality of cells (100), the accommodating device (200) includes a plurality of accommodating regions, and each accommodating region has a first side edge (201) and a second side edge (202) and cells (100) disposed between the first side edge and the second side edge. A distance between the first side edge (201) and the second side edge (202) along a first direction varies with different accommodating regions, each cell (100) includes a first end and a second end, and a distance between the first end and the second end matches a distance between a corresponding first side edge (201) and a corresponding second side edge (202).