The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2003
Filed:
Nov. 20, 2001
Other;
Abstract
a voltage equalizing apparatus for battery devices includes a core, a plurality of first closed circuits and a second closed circuit. The plurality of first closed circuits each includes one of a plurality of first battery devices interconnected in series, one of a plurality of secondary windings magnetically connected with each other through the core, and one of a plurality of first switching devices. The second closed circuit includes a second battery device, a primary winding magnetically connected with the secondary windings through the core, and a second switching device. 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. The first switching devices continue to be turned ON after completion of the transportation of the exciting energy stored in the core. In the voltage equalizing apparatus for battery devices, the ON-duration ratio T /T between the ON duration T of the first switching devices S to Sn and the ON duration T of the second switching device S is set so that the voltages of the first battery devices B to Bn become a predetermined voltage.