Solar cell battery charging control system
AssigneeCitizen Watch Co., Ltd.
InventorsYoshinobu Kashima, Makoto Yoshida
Life of this patent
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Abstract
A solar cell battery charging control system having a storage battery and a plurality of solar cells connected in series for charging the storage battery, which system comprises a heavy load means adapted to be driven by the storage battery to discharge the storage battery for thereby preventing overcharging of the storage battery when a battery charge level exceeds a predetermined value.
Claims8
A solar battery charging control system having a storage battery and a plurality of solar cells connected in series with said storage battery to charge said storage battery, comprising:
- detection means for detecting a battery charge level and generating an output signal when said battery charge level exceeds a predetermined value;
- a driver circuit for generating a drive signal responsive to said output signal;
- and
- heavy load means responsive to said drive signal to discharge said storage battery thereby preventing overcharging of said storage battery, said heavy load means discharging said battery for a predetermined interval of time, the duration of said predetermined interval of time being determined by said output signal from said detection means.
A solar cell battery charging control system having a storage battery, and a plurality of solar cells connected in series for charging said storage battery, comprising:
- detection means for detecting a battery charge level and generating an output signal when said battery charge level exceeds a predetermined value;
- and
- a liquid crystal cell functioning as a light control valve to control a level of light incident upon at least one of said plurality of solar cells responsive to said output signal.
Dependencies are inferred from the claim text.