State-of-charge adjusting apparatus
First Claim
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.
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Accused Products
Abstract
The state-of-charge adjusting apparatus which enables to shorten a time to reach a capacity equalization is provided. A CPU extracts a block consisting of a plurality of unit cells connected continuously to each other, the plurality of the unit cells each having a voltage higher than a target voltage, and connects both ends of each block to a discharge resistance to make each block discharge. Thereafter, the CPU extracts a unit cell having a voltage higher than the target voltage and connects both ends of the extracted unit cell to the discharge resistance to make the extracted unit cell discharge until the voltage of the extracted unit cell reaches the target voltage.
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Citations
5 Claims
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1. A state-of-charge adjusting apparatus comprising:
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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 Dependent Claims (2, 3, 4, 5)
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Specification