Battery pack of electric vehicle

The invention provides a battery pack of an electric vehicle. The battery pack comprises a battery pack installation frame with a structure matching with the inner space of an electric vehicle, multiple battery cells which are combined and are fixed in the battery pack installation frame, a distributed battery controller which is arranged in the battery pack installation frame and is connected to the battery cells, and a connector which is arranged at the outer side of the battery pack installation frame and is connected to a power connection port of the electric vehicle. The battery cells are combined in different ways to form a special-shaped battery pack so that maximized use of an electric vehicle space is realized. The battery pack is conducive to a compact layout design of an electric vehicle and increases an electric vehicle battery pack capacity as large as possible.