Patent ID: 7205746
Filing Date: 2007-04-17
Classification: G01R,H01M,H02J,Y02E

Abstract:
1. A battery cover assembly, comprising: a current measuring terminal assembly for measuring electrical current to and from a battery post, wherein the current measuring terminal assembly comprises a first voltage measuring device coupled to the first and second leads for measuring voltage drop across the resistor, wherein the voltage drop across the resistor is proportional to the current therethrough; a processor coupled to the first voltage measuring device; a non-volatile memory coupled to the processor and storing the known resistance of the resistor, wherein the processor is programmed to receive the measured voltage from the first voltage measuring device, retrieve the known resistance value from the non-volatile memory, calculate the current flowing through the resistor based upon the measured voltage and the known resistance; a communications interface coupled to the processor; a temperature measuring device coupled to the processor and in thermal communication with the resistor, wherein the temperature measuring device provides the resistor temperature to the processor; and a table of temperature coefficients of resistivity for the resistor stored in the non-volatile memory; wherein the processor calculates a temperature compensated resistance of the resistor based on a known resistance, the temperature coefficient of resistivity, and the measured temperature, and thereby calculates the current through the resistor based upon the measured voltage across the resistor and the temperature compensated resistance.