Patent ID: 7486045
Filing Date: 2009-02-03
Classification: H01M,H02J,Y02E

Abstract:
1. A battery pack comprising: at least one rechargeable battery having a pair of positive and negative electrodes; a pair of externally exposed charge/discharge terminals connected to the electrodes of the rechargeable battery for supplying power to an electrical equipment unit connected to the battery pack; an externally exposed battery pack signal terminal for identifying the type of the battery pack; a battery pack communication portion connected to the battery pack signal terminal for receiving an authenticity signal transmitted from the electrical equipment unit through the battery pack signal terminal; a random number generating portion for generating a random number based on a predetermined condition; and a battery pack control portion for generating a detection signal from the authenticity signal received by the battery pack communication portion and the random number generated by the random number generating portion, and for transmitting the detection signal from the battery pack communication portion to the electrical equipment unit side through the battery pack signal terminal, wherein the detection signal generated by the battery pack control portion is a random signal generated from the authenticity signal and the random number generated by the random number generating portion.