BATTERY PACK

The present invention provides a battery pack comprising a plurality of individual batteries, a battery holder, a circuit board, and a temperature sensor. The battery holder is used to fix the batteries. The circuit board is electrically connected to the batteries and mounted on the battery holder. The temperature sensor is electrically connected to the circuit board, and comprises a flexible sheet and a temperature sensing block attached thereto, the temperature sensing block being thicker than the flexible sheet. The battery holder is provided with a mounting slot and a yielding slot, the temperature sensor can pass through the mounting slot and be fixed by the battery holder and the batteries, and the temperature sensing block is located in the yielding slot and is in close contact with the batteries. According to the present invention, the temperature sensing block, which is thicker, is accommodated in a yielding slot, so that the battery holder remains in close contact with the batteries to tightly clamp the temperature sensor, the battery holder is pressed against the flexible sheet and transmits a pressing force to the temperature sensing block by the flexible sheet, thereby ensuring that the temperature sensing block is in close contact with the batteries to improve the accuracy of temperature measurement. The mounting slot of the battery holder makes it convenient to mount the temperature sensor.