Battery charger apparatus and method with multiple range current

Details Battery charger apparatus and method with multiple range current Battery charger apparatus and method with multiple range current

1993-12-23

1996-09-10

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 39, H01M 1046, H01M 1044, H02J 704

Patent

active

055549217

ABSTRACT:
An improved battery charger apparatus and method with multiple range current control includes a programmable current source (101) for providing a charge current (105) to charge a battery (107). An amplitude of the charge current (105) is dependent on a charge demand signal (117) supplied to the programmable current source (101). A scaler (109) provides a scaled charge current signal (111), dependent on the charge current (105) and a current range signal (113). A charge current control unit (115) regulates the charge current (105) by providing the charge demand signal (117) to the programmable current source (101) dependent on the scaled charge current signal (111). More than one amplitude of the charge current (105) is provided to the battery (107), dependent on more than one current range signal (113) provided by the charge current control unit (115) to the scaler (109). Moreover, a constant amplitude of the scaled charge current signal (111) is maintained responsive to the more than one current range signal (113).

REFERENCES:
patent: 4433277 (1984-02-01), Carollo et al.
patent: 4835453 (1989-05-01), Schmidt et al.
patent: 4924169 (1990-05-01), Shifflet et al.
patent: 5192905 (1993-03-01), Karlin et al.
patent: 5204611 (1993-04-01), Nor et al.

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