Patent ID: 6642693
Filing Date: 2003-11-04
Classification: H02J

Abstract:
A voltage equalizing apparatus for battery devices comprising:a core; a plurality of first battery devices interconnected in series with each other; a plurality of secondary windings magnetically connected with each other through the core; a plurality of first switching devices, each connected to one of the secondary windings and one of the first battery devices to constitute a first closed circuit; a second battery device; a primary winding magnetically connected with the secondary windings through the core; and a second switching device connected in series with the second battery device and the primary winding to constitute a second closed circuit; wherein the first switching devices and the second switching device are alternately turned ON and OFF to equalize the output voltages of the first battery devices; when the second switching device is turned ON, exciting energy stored in the core is transported to the first battery devices through the first switching devices; and the first switching devices continue to be turned ON after completion of the transportation of the exciting energy.