Method and apparatus for determining battery characteristics

Details Method and apparatus for determining battery characteristics Method and apparatus for determining battery characteristics

1994-07-05

1996-11-19

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

429 90, 320 2, H01M 1046, H01M 1048

Patent

active

055766102

ABSTRACT:
A battery charging system (200) comprises a battery pack (206) and charger (202). Battery pack 206 includes a thermistor (212) for determining the temperature of battery pack (206) and a zener diode (210)in parallel with the thermistor (212) for informing charger (202) of the current capacity of battery (206) or of another battery parameter. Charger (202) includes a transistor (220) and zener diode (214) for effectively switching between measuring thermistor (212) and zener diode (210) at charger input terminal (224). This effectively reduces the number of battery and charger contacts required to measure two battery parameters as compared to the prior art.

REFERENCES:
patent: 4006396 (1977-02-01), Bogut
patent: 5164652 (1992-11-01), Johnson et al.
patent: 5200686 (1993-04-01), Lee
patent: 5411816 (1995-05-01), Patino
patent: 5460901 (1995-10-01), Syrjala

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