Household device continuous battery charger utilizing a constant voltage regulator
AssigneeThe Gillette Company
InventorsJordan T. Bourilkov, David N. Klein, In Tae Bae, George M. Cintra
Life of this patent
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Abstract
Charging at least one rechargeable battery includes regulating a voltage applied to the at least one rechargeable battery by coupling a circuit between an output of a rectifier circuit and the at least one rechargeable battery, limiting the charging current to be within a first predetermined range and when a predetermined battery charging voltage is reached, dropping the charging current to be within a second predetermined range.
Claims20
A battery charger device configured to charge at least one rechargeable battery, the device comprising:
- a voltage regulator circuit configured to receive a voltage and provide a substantially constant regulated output voltage at a charging current during charging of the rechargeable battery and at a trickle charging current subsequent to the rechargeable battery reaching substantially full charge;
- and
- a resistor connected in series with an output of the voltage regulator circuit and the at least one rechargeable battery, the resistor having a resistance value to limit the charging current to be below a first predetermined value and to limit the trickle charging current to be below a second, different predetermined value.
A battery charger device to charge at least one rechargeable battery, the device comprising:
- a transformer having a secondary circuit and a primary circuit;
- a rectifier circuit coupled to the secondary circuit of the transformer, the rectifier circuit to provide a DC voltage;
- a voltage regulator circuit coupled to the rectifier circuit to provide a substantially constant regulated DC voltage at a charging current during charging of the at least one rechargeable battery and at a trickle charging current subsequent to the at least one rechargeable battery reaching substantially full charge, a value of the charging current related to the substantially constant regulated voltage output and a value of a voltage across the at least one rechargeable battery;
- and
- a resistor coupled in series between an output of the voltage regulator circuit and the at least one rechargeable battery, the resistor having a resistance value provided to limit the charging current to be below a first predetermined value and to limit the trickle charging current to be below a second, different predetermined value.
A battery charger device configured to charge at least one rechargeable battery, the device comprising:
- a rectifier circuit to provide a DC voltage;
- circuitry coupled to the rectifier circuit to receive the DC voltage and provide to the at least one rechargeable battery a substantially constant regulated DC voltage at:
- a first predetermined value of a charging current during charging of the at least one rechargeable battery;
- a second, different predetermined value of a trickle charging current subsequent to the rechargeable battery reaching substantially full charge;
- and
- a resistor coupled between the circuitry a terminal that receives the at least on rechargeable battery to limit the charging current to be below the first predetermined value and to limit the trickle charging current to be below the second, different predetermined value.
Dependencies are inferred from the claim text.