Patent ID: 7528580

Claim:
A battery pack monitoring apparatus comprising: a bare cell adapted to be charged or discharged with a bare cell voltage; sensors for sensing bare cell charging/discharging voltages, bare cell charging/discharging currents, and bare cell temperature, and converting sensed bare cell charging/discharging voltages, bare cell charging/discharging currents, and bare cell temperature into electrical signals; a first storage unit for storing bare cell discharging capacity versus time data and bare cell charging capacity versus time data as a function of the bare cell temperature to obtain tabulated data; and a monitoring control unit for converting the electrical signals into digital signals, for receiving the tabulated data from the first storage unit, and for processing the digital signals and the tabulated data in accordance with control commands to obtain a present value of the charging/discharging capacity of the battery pack as a function of time and temperature and to obtain processed bare cell charging/discharging voltages, processed bare cell charging/discharging currents, and processed bare cell temperature.