Electricity: battery or capacitor charging or discharging – Battery or cell charging
Reexamination Certificate
2006-10-31
2006-10-31
Easthom, Karl (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
C320S131000, C320S130000, C320S156000, C320S161000, C324S426000, C324S427000
Reexamination Certificate
active
07129675
ABSTRACT:
A method for charging a lead acid storage battery to advantageously extend its life is described. The termination of a charging process is based upon an evaluation of the first derivative (dv/dt) and second derivative (d2v/dt2) of the applied charging voltage. By utilizing the first derivative (dv/dt) and second derivative (d2v/dt2) as charging criteria, an amount of overcharge is applied to the battery that takes into account the precise amount of amp-hours previously removed from the battery. A charger arrangement for performing a charging process of the invention also is described.
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“Charge batteries safely in 15 minutes by detecting voltage inflection points”; EDN Magazine; Sep. 1, 1994**.
Boateng Alexis
Christie Parker & Hale LLP
Easthom Karl
Trojan Battery Company
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