×

VOLTAGE EQUALIZATION APPARATUS AND METHOD FOR BATTERY SYSTEM

  • US 20100123433A1
  • Filed: 08/24/2009
  • Published: 05/20/2010
  • Est. Priority Date: 11/19/2008
  • Status: Abandoned Application
First Claim
Patent Images

1. A voltage equalization apparatus for a battery system with more than two serial cells, comprising:

  • a mutual inductor or a transformer, comprising a primary winding, a magnetic core and a plurality of secondary windings;

    a first switch, connected in series with the primary winding, wherein the first switch and the primary winding are connected in parallel with the battery system;

    a plurality of second switches, respectively connected in series with the secondary windings, wherein the second switches and the secondary windings are connected in parallel with the cells; and

    a voltage equalization control circuit, configured to;

    test voltage of each cell in the battery system and control turning off and turning on of the first switch and second switches; and

    when the battery system is charged, turn on a second switch in parallel with a cell of highest voltage, and after a first preset time turn off the second switch with the cell of highest voltage and turn on the first switch.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×