Charging control apparatus using variable intermittent current charging
First Claim
1. A battery charging control apparatus for controlling charging of a secondary battery, comprising:
- controlling means for performing control of an intermittent charging in such a manner that, when the voltage of said secondary battery which is being charged has risen to a level not lower than a predetermined reference level, the supply of the charging current is suspended after being forcibly supplied to said secondary battery for a predetermined forced charging time and, when the voltage of said secondary battery has come down to said reference voltage after the suspension of the supply of said charging current, said charging current is supplied again to said secondary battery, the suspension of supply of said charging current and the forced supply of said charging current being alternately and repeatedly performed; and
switching means controlled by said controlling means so as to turn on and off said charging current;
wherein said controlling means being arranged to vary the forced charging time in accordance with the progress of the charging of said secondary battery.
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Accused Products
Abstract
A battery charging control apparatus for controlling charging of a secondary battery has a FET which is so controlled that the supply of a charging current is suspended after being forcibly supplied to the secondary battery for a predetermined charging time, when the voltage of the secondary battery has risen to a level equal to or higher than a predetermined reference voltage, and, after the battery voltage has come down to the reference voltage during the suspension of the supply of the charging current, forced supply of the charging current is commenced again, thus realizing intermittent charging. The FET also is so controlled as to vary the above-mentioned charging time in accordance with the progress of charging of the secondary battery.
40 Citations
9 Claims
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1. A battery charging control apparatus for controlling charging of a secondary battery, comprising:
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controlling means for performing control of an intermittent charging in such a manner that, when the voltage of said secondary battery which is being charged has risen to a level not lower than a predetermined reference level, the supply of the charging current is suspended after being forcibly supplied to said secondary battery for a predetermined forced charging time and, when the voltage of said secondary battery has come down to said reference voltage after the suspension of the supply of said charging current, said charging current is supplied again to said secondary battery, the suspension of supply of said charging current and the forced supply of said charging current being alternately and repeatedly performed; and switching means controlled by said controlling means so as to turn on and off said charging current; wherein said controlling means being arranged to vary the forced charging time in accordance with the progress of the charging of said secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery charging control apparatus for controlling charging of a secondary battery, comprising:
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controlling means for performing control of an intermittent charging in such a manner that, when the voltage of said secondary battery which is being charged has risen to a level not lower than a predetermined reference level, charging current is suspended after being forcibly supplied to said secondary battery for a predetermined forced charging time and, when the voltage of said secondary battery has come down to said reference voltage after the suspension of the supply of said charging current, said charging current is supplied again to said secondary battery, the suspension of supply of the charging time and the forced supply of said charging current being alternately and repeatedly performed; and switching means controlled by said controlling means so as to turn on and off said charging current; wherein said controlling means being arranged to vary the length of time of suspension of the supply of the charging current in accordance with the progress of the charging of said secondary battery.
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Specification