Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1994-07-13
1996-09-03
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
455 99, 455127, H01M 1044
Patent
active
055526926
ABSTRACT:
A voltage modifying device for charging rechargeable batteries, such as nicad batteries, used for powering mobile radio telephones from a DC source, such as that provided in a vehicle. The device is connectable to a DC power source, a rechargeable battery and the power input of a telephone transceiver. Power from the DC power source is directed to the transceiver and the voltage modifying circuit modifies the supply voltage so as to provide a charging current to the rechargeable battery. The modifying circuit includes a charge pump for increasing the charging voltage in addition to circuitry arranged so as to charge and discharge said charge pump at substantially constant current so as to minimize telephone transceiver interference.
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patent: 5438696 (1995-08-01), Napoles
Nokia Mobile Phones Ltd.
Toatley Gregory
Wong Peter S.
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