Battery charge circuit with multi-charge stage and method...

Electricity: battery or capacitor charging or discharging – Cell or battery charger structure

Reexamination Certificate

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Details

C320S109000, C320S110000, C320S111000, C320S112000, C320S113000, C320S114000, C320S115000

Reexamination Certificate

active

07375491

ABSTRACT:
A charge circuit having multi charge stages for charging at least one battery includes: a first current generating circuit for generating a first charge power having a first charge current in pulse form with a first frequency and a first charge voltage to charge the at least one battery; a voltage generating circuit connected to the first current generating circuit for controlling the first charge power having a first charge current in pulse form with a first frequency and a first charge voltage; a voltage control circuit connected to the voltage generating circuit for generating a first constant voltage and/or a second constant voltage; and a second current generating circuit connected to the voltage generating circuit for generating a variant power comprising a variant current in pulse form with a second frequency wherein a charge voltage included in the variant power varies with the second frequency.

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