BATTERY PACK, BATTERY MODULE HAVING THE BATTERY PACK, POWER SUPPLY DEVICE HAVING THE BATTERY MODULE

A battery pack (P), a battery module including the battery pack, and a power supply device including the battery module. The battery pack includes: a type-1 battery cell (C1); and a series of type-2 battery cells (C2) which have an output power and a capacity different from an output power and a capacity of the type-1 battery cell (C1) and are arranged along a circumference of the type-1 battery cell (C1) to surround the type-1 battery cell. The series of type-2 battery cells (C2) are connected in parallel to the type-1 battery cell (C1). The battery pack (P) is a high-power, high-capacity battery pack capable of instantaneously outputting high power without a decrease in lifespan for a long time.