PARTIAL DISCHARGE FAULT DETECTOR FOR BATTERY TESTING

An apparatus, a method and a system for testing a battery are disclosed. A voltage source adapted to apply a voltage to an assembly having a first battery electrode, a second battery electrode and a separator layer disposed between the first and second battery electrodes. A current logger is adapted to measure a current caused by partial discharges in the separator layer caused by the contaminants or voids in the separator layer, or at an interface between the first battery electrode and the separator layer, or at an interface between the second battery electrode and the separator layer, or in the separator layer. The voltage is less than a threshold value of a characteristic breakdown voltage of the separator layer.