Electricity: battery or capacitor charging or discharging – Diverse charging or discharging rates for plural batteries
Patent
1998-04-29
2000-02-15
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Diverse charging or discharging rates for plural batteries
320137, 320141, H01M 1044
Patent
active
060256974
ABSTRACT:
The present invention relates to a process for charging a battery from an alternating current voltage which provides voltage to the battery in each direction. The charging current is regulated alternatively in a boost and buck mode as a function of an error (AI) between the instant value of the current and an instant value of a supply current following a pre-determined pattern. The activation of the modes of operation is controlled according to the sign of the error of the current (AI). The present invention also relates to a battery charger for implementing the above charging process. The battery charger has two sub-assemblies for current regulation operating respectively in boost and buck modes, a subtractor for determining the error of current, and a common loop for feeding the sub-assemblies and controlling amplifiers for the activation, depending on the sign of the error.
REFERENCES:
patent: 4565958 (1986-01-01), Cooper
patent: 4988889 (1991-01-01), Oughton, Jr.
patent: 5359280 (1994-10-01), Canter et al.
patent: 5500579 (1996-03-01), Kim et al.
Long Marc
Plaideau Michel
Tonnelier Michel
Sagem S.A.
Tso Edward H.
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