Voltage balance circuit for rechargeable batteries

The present invention discloses a voltage balance circuit for batteries and a battery charging bypass circuit to make the batteries in a battery set in charging to be equally charged. When the batteries in a battery set have different terminal voltages, a controllable power switch device in the circ...

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Bibliographic Details
Main Authors HUANG, YI-SHUO, LIN, BAUIUAN, LI, TZUNG-LIN, LI, JIUN-SHIAN
Format Patent
LanguageEnglish
Published 21.02.2005
Edition7
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Summary:The present invention discloses a voltage balance circuit for batteries and a battery charging bypass circuit to make the batteries in a battery set in charging to be equally charged. When the batteries in a battery set have different terminal voltages, a controllable power switch device in the circuit is turned on and off with a high frequency to decrease the input current of the battery with a higher terminal voltage and increase the input current of the battery with a lower terminal voltage, so as to achieve the purpose of equally charging the batteries. With the voltage balance circuit disclosed by the present invention, it is able to prevent the battery from being over-charged and damaged. When the number of batteries to be charged is increased, the circuit can be expanded in a modular manner, thereby decreasing the inconvenience and trouble in changing the circuit design.
Bibliography:Application Number: TW20030121816