BATTERY PACK AND ELECTRICAL DEVICE CONTAINING SAME

A battery pack includes at least a first battery cell and a second battery cell. The battery pack includes a region A and a region B. The region A is a region of a low thermal insulation capability and is located on all sides and/or at a bottom of the battery pack. A remaining region is the region B. A percentage of a number of the first battery cells among battery cells in the region A is 10% to 100%. A percentage of a number of the second battery cells among battery cells in the region B is 5% to 100%.