Patent ID: 6893753

Claim:
A rechargeable battery pack comprising: a rechargeable battery having a casing sealed at a first end of the rechareable battery, a second end, a first electrode disposed on said first end, and a second electrode; a circuit assembly disposed having a first surface opposing said first end of the rechargeable battery and a second surface opposite said first surface, the circuit assembly being connected to said first electrode and said second electrode; a battery protection integrated circuit for protecting the rechargeable battery from overcharging, the battery protection integrated circuit being arranged on the first surface of the circuit assembly which faces the first end of the rechargeable battery; input and output terminals arranged on the second surface of the circuit assembly; an upper insulating layer which is disposed over the second surface of the circuit assembly and in which openings are formed at locations corresponding to the input and output terminals; a lower insulating layer disposed covering the second end of the rechargeable battery; and an insulating sheet for covering a peripheral side surface of the rechargeable battery.