Battery pack

Details Battery pack Battery pack

2005-11-10

2008-11-18

Ullah, Akm E (Department: 2838)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

C320S116000

Reexamination Certificate

active

07453237

ABSTRACT:
A battery pack that detects the voltage of a plurality of batteries (1) connected in series with a plurality of voltage detection circuits (2). When a voltage detection circuit output is HIGH, batteries (1) discharge through an output resistor (6). In addition, discharge circuits (7), which are series connections of balance resistors (8) and switching devices (9), are connected in parallel with batteries (1) left “un-discharged” by the output resistors (6). When a voltage detection circuit output is HIGH, some batteries (1) are discharged by the output resistor (6) and the “un-discharged” batteries (1) are discharged by the discharge circuit (7). When a voltage detection circuit output is LOW, no batteries (1) are discharged by the output resistor (6) and the “un-discharged” batteries (1) are also left un-discharged by the discharge circuit (7) to balance the discharge currents of all the batteries (1).

REFERENCES:
patent: 5498950 (1996-03-01), Ouwerkerk
patent: 2003/0062874 (2003-04-01), Furukawa
patent: 0 512 340 (1992-11-01), None
patent: 11-233154 (1999-08-01), None
patent: 2004-129439 (2004-04-01), None

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