Patent ID: 6700384
Filing Date: 2004-03-02
Classification: G01R,H02J

Abstract:
A leakage detection circuit for use in a power source device provided with a cell unit comprising a plurality of cells, the leakage detection circuit for use in the power source device being characterized in that the circuit comprises:a first current path being connected to opposite electrodes of the cell unit, and having a reference point generating a reference voltage corresponding to potential difference between the opposite electrodes, a second current path being connected to the opposite electrodes of the cell unit, and having three points which are different in potential difference, the three points of which an intermediate point is connected to a grounding via an insulation resistor, a first and second comparators having one input end to which voltage is applied from each of the two points divided by the intermediate point of the second current path, and having the other input end to which reference voltage is applied from the reference point of the first current path, and a detection circuit detecting leakage occurrence based on outputs of the first and the second comparators.