Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Reexamination Certificate
1999-12-08
2001-08-21
Wong, Peter S. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
Reexamination Certificate
active
06278260
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
A Charging Device which derives its Detecting and Monitoring functions from Temp. and featuring Environmental Temperature Differential Compensation capabilities.
(b) Description of the Prior Art
In a conventional secondary rechargeable cell, the instantaneous charging status, the saturation, in particular, may be determined by detecting the internal resistance of the terminal voltage of the secondary cell that is being charged, or else by verifying the instantaneous negative voltage effect or the temp. rise, for the same purpose, the most common method being the temp. detection approach, the pity, however, is that by and large a charging environment can be such that its ambient temp. reaches as high as 40 to 50° C., or go down below 0° C., as a result the temp. at which the battery cell is being charged would be affected accordingly.
SUMMARY OF THE INVENTION
The primary object of the invention, therefore, is to provide a Charging Device which derives its Detecting and Monitoring function from Temperature and featuring Environmental Temperature Differential Compensation capabilities, whereby a Charging Control Ckt. is simultaneously supplied with outcome of detection coming from an Ambience Temp. Detector, on the one hand, and outcome of detection coming from Detector of the Temp. of the Secondary Rechargeable Cell in a state of being charged, on the other hand, so that with a lower ambience temp. prevailing the temp. testing point respecting a charge saturation status of the secondary rechargeable cell will downgrade accordingly, while with a higher ambience temp. prevailing, the corresponding temp. testing point will mark up too commensurably, that in an effort to upgrade the precision, namely, the reliability of the result of testing of charge saturation.
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patent: 6081101 (2000-06-01), Yang
Bacon & Thomas PLLC
Tibbits Pia
Wong Peter S.
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