Battery protection circuit for simulating an overcurrent...

Details Battery protection circuit for simulating an overcurrent... Battery protection circuit for simulating an overcurrent...

2006-12-05

2006-12-05

Tso, Edward H. (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

Reexamination Certificate

active

07145313

ABSTRACT:
A battery protection circuit is provided that includes current monitoring circuit. The current monitoring circuit senses current flowing to or from a rechargeable cell. When the current exceeds a maximum value, the current monitoring circuit actuates, whereby opening a transistor. The transistor has a resistor couple in parallel. When the transistor opens, current is forced through the resistor coupled in parallel with the transistor, thereby limiting the current to a maximum value. The current monitoring circuit also simulates an overcurrent condition in the safety circuit. The overcurrent condition causes a disconnect switch to open, thereby disconnecting the cell(s) from the external terminals.

REFERENCES:
patent: 5164652 (1992-11-01), Johnson et al.
patent: 5185566 (1993-02-01), Goedken et al.
patent: 5767657 (1998-06-01), Oglesbee
patent: 6903533 (2005-06-01), Geren et al.
U.S. Appl. No. 10/737,021, Geren et al.
U.S. Appl. No. 10/811,665, Geren.
U.S. Appl. No. 10/185,095, Oglesbee.

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