Electricity: battery or capacitor charging or discharging – Battery or cell charging
Reexamination Certificate
2006-03-10
2009-10-20
Ullah, Akm E (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
C320S128000, C320S130000, C320S164000
Reexamination Certificate
active
07605568
ABSTRACT:
In one implementation, a method for charging a battery system is provided. The method includes enabling determining if a charger is coupled to a battery system, the battery system including one or more cells and a charge enable transistor. The method also includes enabling determining if a voltage level of the cells is less than a predetermined first low voltage level. If the voltage level of the cells is less than the predetermined first low voltage level, enabling charging of the cells at a reduced rate including adjusting a voltage applied to the charge transistor gate terminal to regulate a voltage seen by the charger to a level that is less than a predetermined second voltage level. Additionally, when the voltage of the cells reaches the predetermined first low voltage level, the method includes substantially fully enabling the charge transistor to allow for charging at full rate by the charger.
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PCT International Search Report in corresponding PCT application #PCT/US07/63602 dated Feb. 22, 2008, 2 pages.
Aas Arne
Gangstoe Gunnar
Kastnes Paal Ronny
Sato Hideyuki
Atmel Corporation
Diao M'Baye
Fish & Richardson P.C.
Sony Corporation
Ullah Akm E
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