Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1980-10-10
1983-01-25
Pellinen, A. D.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 48, H02J 710
Patent
active
043706061
ABSTRACT:
A diode is disposed in the vicinity of a rechargeable battery. A current is applied to the diode from a current generating circuit. The current generating circuit comprises a thermistor which is responsive to the ambient temperature, so that a current associated with the ambient temperature is applied from the current generating circuit to the diode. The diode gives rise to a forward voltage drop, which is changeable as a function of the battery temperature. Accordingly, the forward voltage drop across the diode is changeable as a function of the ambient temperature and the battery temperature. The forward voltage drop across the diode is amplified to be used as a reference voltage. On the other hand, the rechargeable battery is supplied with a charging current from a power supply through a thyristor. The gate electrode of the thyristor is connected to receive the reference voltage and the cathode of the thyristor is connected to the battery. Accordingly, the thyristor is turned off if and when the difference between the reference voltage and the battery voltage becomes smaller than the switching voltage of the thyristor.
REFERENCES:
patent: 3599071 (1971-08-01), Lapuyade et al.
patent: 4125802 (1978-11-01), Godard
patent: 4240022 (1980-12-01), Kilinskis et al.
Ball, "There's No Overcharge for Fast-Charged Batteries", Electronics, Jan. 22, 1968, pp. 97-100, 320-335.
Furukawa Kaoru
Kakumoto Hiromi
Matsushita Electric & Works Ltd.
Pellinen A. D.
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