Battery charger circuit
First Claim
1. A battery charger circuit comprising at least one main transformer and at least one boost transformer, said main transformer supplying power to produce a DC main charging current at a circuit output for charging a battery, said boost transformer supplying power to produce a DC trickle charging current at the circuit output, the power rating of said boost transformer being a small percentage of that of the main transformer, said main and boost transformers having outputs connected through a parallel circuit for charging the battery.
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Accused Products
Abstract
A battery charger circuit having a main transformer and a boost transformer. The main transformer supplies power to produce a DC main charging current at the circuit output for charging a battery. The boost transformer supplies power to produce a DC trickle charging current at the circuit output. The power rating of the boost transformer is a small percentage of that of the main transformer.
20 Citations
21 Claims
- 1. A battery charger circuit comprising at least one main transformer and at least one boost transformer, said main transformer supplying power to produce a DC main charging current at a circuit output for charging a battery, said boost transformer supplying power to produce a DC trickle charging current at the circuit output, the power rating of said boost transformer being a small percentage of that of the main transformer, said main and boost transformers having outputs connected through a parallel circuit for charging the battery.
- 11. A battery charger circuit comprising at least one main transformer and at least one boost transformer, the main transformer being of a center tap type, a network associated with the main transformer to provide full wave DC main charging current to a battery at the output of the charging circuit, said boost transformer being of high impedance and low power rating compared to the main transformer, said boost transformer supplying power to produce a DC trickle charging current at the circuit output, said trickle charging current being supplied with the main charging current, the ratio of trickle charging current to the main charging current increasing as the battery charges, and said trickle charging current continuing to be supplied to said battery after the battery is charged to rated voltage.
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15. A battery trickle charger for connection to a main charger circuit to supply trickle charge to a battery, said main charger circuit including at least one main transformer and associated network for supplying power to produce a Dc main charging current at its output, said trickle charger comprising:
- at lest one boost transformer supplying power to produce a DC trickle charging current at said output, the power rating of said boost transformer being a small percentage of that of the main transforer, and means for connecting said trickle charger to a main charger circuit to supply trickle charge to the battery with the main and boost transformers having outputs connected through a parallel circuit for charging the battery.
- View Dependent Claims (16, 17, 18, 19, 20, 21)
Specification