Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells
Patent
1998-03-20
1999-12-07
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
320120, 320145, H01M 1046
Patent
active
059989661
ABSTRACT:
A battery charger for use with different types of batteries, such as batteries requiring constant current charging, such as nickel cadmium (NiCd) and nickel metal hydride (NiMH) batteries, as well as batteries which not only require constant current charging, but also require constant voltage charging, such as lithium ion batteries. The battery charger includes a pulse width modulator circuit for controlling a power transistor to provide a constant current or a constant voltage output as a function of the battery characteristics. The battery charger may include dual pockets for charging two modular batteries on a time division multiplex basis. In the dual pocket application, power is divided between the two pockets as a function of the charging characteristics of the battery and the power dissipation of the power transistors used for supplying charging current to the pockets.
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Tso Edward H.
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