Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1991-08-08
1992-10-20
Stephan, Steven L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 20, 320 21, H02J 704
Patent
active
051573202
ABSTRACT:
A battery charger for rapidly charging batteries of different capacity types is controlled by a microprocessor. The microprocessor controller is also connected to a voltage source which is connected to the battery for supplying a charging current to the battery at a current value selected by a user. The controller is also connected to a voltage reference generator which generates a reference voltage equal to a conditioned battery voltage at the beginning of a charging cycle. The reference voltage increases in predetermined voltage increments as the battery voltage increases during the charging cycle until the battery voltage reaches a peak voltage. A comparator compares the conditioned battery voltage to the reference voltage and sends the results of the comparison to the microprocessor controller. The microprocessor controller causes the reference voltage generator to increase the reference voltage by a predetermined voltage increment if the conditioned battery voltage is greater than the reference voltage. If the conditioned battery voltage is less than the reference voltage for a first predetermined time period, the microprocessor causes the voltage source to decrease the charging current to a trickle charge.
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Berhane Adolf
Stephan Steven L.
Tyco Industries, Inc.
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