Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – Having variable number of cells or batteries in series
Reexamination Certificate
2006-05-23
2006-05-23
Tibbits, Pia (Department: 2838)
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
Having variable number of cells or batteries in series
C320S116000
Reexamination Certificate
active
07049791
ABSTRACT:
A battery energy balance circuit and a battery charging bypass circuit is disclosed for batteries being charged at the same time to be charged equally. When the terminal voltages of the batteries are different, a controllable power device switch in the circuit switches on and off at a high frequency in order to reduce the input current to the batteries with higher terminal voltages and to increase the input current to the batteries with lower terminal voltages, achieving the goal of equal charging. The disclosed energy balance circuit can avoid damages to the batteries as a result of overcharging. When the number of batteries increases, one can expand the system in a modularized way to prevent inconvenience of circuit designs.
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Huang Yi-Shuo
Lee Chun-Hsien
Lee Chung-Lin
Lin Pao-Chuan
Birch & Stewart Kolasch & Birch, LLP
Industrial Technology Research Institute
Tibbits Pia
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