发明名称 |
Overcharge protection circuitry for rechargeable battery pack |
摘要 |
A self-contained, rechargeable battery pack uses a coulomb-counting control circuit to measure charge received by and taken from the cells and to store a current charge status of those cells. The control circuit controls a charge/discharge pass transistor in the pack to provide overcharge protection. An always-on trickle charge resistor insures that the controller is in operation during charging even when the cells associated with the controller are completely discharged. A Schottky diode is placed across the charge/discharge pass transistor in order to minimize the discharge dropoff voltage between the terminal of the cell and a corresponding external terminal. The present invention considerably lengthens the useful life of nickel-based rechargeable batteries, as measured in terms of both the number of cycles and the available capacity per cycle, while requiring no extra terminals.
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申请公布号 |
US5867008(A) |
申请公布日期 |
1999.02.02 |
申请号 |
US19970868002 |
申请日期 |
1997.06.03 |
申请人 |
DOUBLE-TIME BATTERY CORPORATION |
发明人 |
DU, XIN;BACHNER, III, EDWARD F. |
分类号 |
H02J7/00;(IPC1-7):H01M10/46 |
主分类号 |
H02J7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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