A battery protector for providing overvoltage and undervoltage protection to one or more series-connected cells. The battery protector includes a voltage detection and comparison circuit, providing an overvoltage signal indicative of whether the voltage across any of the cells is greater than an overvoltage...http://www.google.com.au/patents/US5581170?utm_source=gb-gplus-sharePatent US5581170 - Battery protector
