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US 6,552,514 B2Granted
Charging device including a multiple-stage voltage source for providing automatic control of charging current
OwnerTai-Her Yanginventor
Life of this patent
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Abstract
A charging device with a multi-step voltage charging source provides active control over charging source voltage to further control its output charging current in the course of charging process for a (dis)chargeable storage device so that when the (dis)chargeable storage device reaches a preset voltage, a primary control switch connected in series with the charging circuit detects and is driven by the preset voltage to execute cutoff so to stop charging the (dis)chargeable storage device.
Claims28
A charging device including a multi-step voltage source for providing automatic control of charging current supplied to a chargeable storage device, comprising:
- a multi-step voltage source arranged to output at least two charging voltages;
- a central control unit arranged to control operation of the multi-step voltage source, wherein said multi-source is caused to output a first current at a first voltage during charging of the chargeable storage device to a preset voltage, and to output a second current smaller than the first current at a voltage higher than the first voltage following charging of the chargeable storage device to the preset voltage;
- a primary control switch connected in series with the charging circuit for cutting off supply of charging current to the chargeable storage device.
Dependencies are inferred from the claim text.