Computerized battery charger
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United States of America Patent
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Oct 20, 1992
Grant Date -
N/A
app pub date -
Aug 8, 1991
filing date -
Aug 8, 1991
priority date (Note) -
Expired
status (Latency Note)
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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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