Ni-Cad battery charge rate controller

Details Ni-Cad battery charge rate controller Ni-Cad battery charge rate controller

1990-10-12

1992-08-04

Stephan, Steven L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 35, 320 36, 320 39, 320 40, H02J 700

Patent

active

051362317

ABSTRACT:
A current limiter placed in the charge path of a battery limits the charge rate that a battery charger can provide to the battery. The battery temperature, voltage, and current are monitored to determine whether the battery can handle a faster rate of charge than the current limiter allows. If the battery can handle a higher rate of charge, a transistor configured in parallel with the current limiter is enabled which by-passes the current limiter and allows the battery charger to charge the battery at a higher rate.

REFERENCES:
patent: 3652915 (1972-03-01), Eberts
patent: 4006397 (1977-02-01), Catotti et al.
patent: 4061956 (1977-12-01), Brown et al.
patent: 4209736 (1980-06-01), Reidenbach
patent: 4371826 (1983-02-01), Shelly
patent: 4392101 (1983-07-01), Saar et al.
patent: 4433277 (1984-02-01), Carallo et al.
patent: 4670703 (1987-06-01), Williams
patent: 4709202 (1987-11-01), Koenck et al.
patent: 4820965 (1989-04-01), Siemer
patent: 4843299 (1989-06-01), Hutchings
patent: 4961043 (1990-10-01), Koenck
Compaq Computer Corporation, Dual Battery Charger Schematic, May 19, 1989, pp. 1-4.

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