POWER BATTERY PACK AND ELECTRIC DEVICE

Provided are a power battery pack and an electrical apparatus. The power battery pack includes a supporting plate and a module. The supporting plate is provided with a pressure relief groove, the pressure relief groove has a plurality of pressure relief cavities arranged in sequence along a length direction thereof, and each pressure relief cavity is provided with at least one pressure relief hole in each side wall on each of two opposite sides of the pressure relief groove. The module includes a plurality of battery cells arranged in sequence, each battery cell corresponds to a pressure relief cavity, and each battery cell is provided with an explosion-proof valve which is partially positioned in the pressure relief cavity. According to the power battery pack, the explosion-proof valve of the battery cell is opposite to the pressure relief groove, the battery cell and the pressure relief cavity formed by the pressure relief groove can accommodate part of the explosion-proof valve, so that, when thermal runaway occurs to a single battery cell, a high temperature gas is discharged through pressure relief holes in the side wall, which can effectively avoid spread of heat.