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US 6,285,166 B1Granted
Battery charger with improved overcharge protection mechanism and method of operation thereof
AssigneeAgere Systems Guardian Corp.
InventorJoseph M. Cannon
Life of this patent
Estimating the term…
Abstract
A battery charger with improved overcharge protection mechanism and method of charging a battery with such charger. In one embodiment, the charger includes: (1) a voltage sensor for sensing a voltage of a battery that the battery charger is charging and (2) a controller, coupled to the voltage sensor, that adjusts a charge mode of the battery charger when samples of the voltage taken over a predetermined period of time are within a predetermined range thereby to prevent overcharging of the battery.
Claims20
A battery charger, comprising:
- a voltage sensor for sensing a voltage of a battery that said battery charger is charging;
- and
- a controller, coupled to said voltage sensor, that adjusts a charge mode of said battery charger when samples of said voltage taken over a predetermined period of time are within a predetermined range thereby to prevent overcharging of said battery.
A method of charging a battery, comprising:
- charging said battery;
- sensing a voltage of said battery;
- and
- adjusting said charging when samples of said voltage taken over a predetermined period of time are within a predetermined range thereby to prevent overcharging of said battery.
1 more element
A cordless telephone, comprising:
- a handset having:
- handset wireless communication circuitry,
- a battery that powers said handset wireless communication circuitry, and
- a base interface;
- and
- a base having:
- base wireless communication circuitry,
- a handset interface removably couplable to said base interface to allow said battery to receive charge current from said base, and
- a battery charger having a voltage sensor for sensing a voltage of said battery and a controller, coupled to said voltage sensor, that terminates a quick charge mode of said battery charger when samples of said voltage taken over a predetermined period of time remain within a predetermined range thereby to prevent overcharging of said battery.
6 more elements
Dependencies are inferred from the claim text.