Self limiting battery charger
First Claim
1. A battery charger circuit controlling the safe charging of a lead acid storage battery, having in combination,a transformer embodied in a battery charger circuitry,means in said circuitry producing a DC charging voltage for a battery,said transformer having a high tap and a low tap,a voltage sensing means signals for a shifting from said high tap of said transformer to said low tap of said transformer when the charging voltage reaches 17.45 volts and signals for a shifting from the low tap to the high tap when the voltage is below 13.6 volts,means sensing the temperature at said battery, andmeans varying the charging voltage to compensate for temperature increases and temperatures decreases.
3 Assignments
0 Petitions
Accused Products
Abstract
A battery charger which senses the percent of charge in a battery, selects automatically on a continuous basis a constant output charging voltage by switching between two different taps of a transformer, limiting the output voltage not to exceed 17.5 volts to protect the electronic components of the vehicle having the battery therein, against the adverse effects resulting from overcharging and compensating for changes in temperature to maintain a constant level of voltage in continuously charging a battery to the point of being fully charged.
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Citations
7 Claims
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1. A battery charger circuit controlling the safe charging of a lead acid storage battery, having in combination,
a transformer embodied in a battery charger circuitry, means in said circuitry producing a DC charging voltage for a battery, said transformer having a high tap and a low tap, a voltage sensing means signals for a shifting from said high tap of said transformer to said low tap of said transformer when the charging voltage reaches 17.45 volts and signals for a shifting from the low tap to the high tap when the voltage is below 13.6 volts, means sensing the temperature at said battery, and means varying the charging voltage to compensate for temperature increases and temperatures decreases.
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7. A battery charger circuit controlling the safe charging of a lead acid storage battery, having in combination
a transformer embodied in a battery charger circuitry, means in said circuitry producing a DC charging voltage for a battery, said transformer having a high tap and a low tap, means upon sensing the charging voltage at a high level signalling for a switch from said high tap to said low tap of said transformer, means upon sensing the charging voltage at a low level signalling for a switch from said low tap to said high tap of said transformer, means responsive to said signalling for switching said circuitry from one tap to the other tap, said sensing means consist of comparator circuits which with regard to a reference voltage determine which tap of the transformer should be used to provide a constant level of charging voltage to the battery, means sensing the temperature at said battery, and means varying the charging voltage to compensate for temperature increases and temperature decreases.
Specification