Electricity: battery or capacitor charging or discharging – Battery or cell charging – Gas controlled
Reexamination Certificate
2007-10-30
2007-10-30
Tso, Edward H (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
Gas controlled
Reexamination Certificate
active
11084910
ABSTRACT:
A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Alternatively, a rechargeable cell may include a strain gauge disposed in its outer surface whose resistance changes as the outer surface of the battery expands due to internal pressure accumulation during charging. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold.
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Bushong William C.
Cheeseman Paul
Kaufman Thomas
Root Michael
Rositch Aaron
Armstrong Teasdale LLP
Spectrum Brands, Inc. ( FKA Rayovac Corporation)
Tso Edward H
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