×

State-of-charge adjusting apparatus

  • US 20080036424A1
  • Filed: 07/18/2007
  • Published: 02/14/2008
  • Est. Priority Date: 08/11/2006
  • Status: Active Grant
First Claim
Patent Images

1. A state-of-charge adjusting apparatus comprising:

  • a voltage detecting means for detecting each voltage of a plurality of unit cells, the plurality of the unit cells consisting of secondary batteries connected in series;

    a discharge resistance for discharging the unit cell; and

    a capacity equalizing means for controlling discharge of the plurality of the unit cells through the discharge resistance on the basis of a voltage of each unit cell detected by the voltage detecting means so that the voltage values of the plurality of the unit cells become uniform, wherein the capacity equalizing means includes;

    (a) a block extracting means which extracts a block consisting of a plurality of unit cells connected continuously to each other, said plurality of the unit cells each having a voltage higher than a target voltage;

    (b) a first equalizing discharge means which connects both ends of said each block to the discharge resistance so as to discharge said each block;

    (c) a unit cell extracting means which extracts a unit cell having a voltage higher than the target voltage after action of the first equalizing discharge means is finished; and

    (d) a second equalizing discharge means which connects both ends of the unit cell extracted by the unit cell extracting means to the discharge resistance so as to discharge the extracted unit cell until the voltage of the extracted unit cell reaches the target voltage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×