Power surge filtering in over-current and short circuit...

Details Power surge filtering in over-current and short circuit... Power surge filtering in over-current and short circuit...

2006-03-10

2009-12-08

Nguyen, Matthew V (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S112000, C320S114000, C320S135000

Reexamination Certificate

active

07629769

ABSTRACT:
A battery pack can include one or more battery cells, current blocking transistors and a battery management system. The disclosed implementations handle over-currents drawn from the battery cells that cause unstable operation of the battery management system. The over-currents are handled without causing an undesired drop in voltage output from the battery cells. The disclosed implementations can handle over-currents even if the over-currents cause the battery management system supply voltage to drop below a minimum operating voltage level for a certain period of time. The disclosed implementations use current blocking transistors that can be configured to block current flow and ensure safe operation of the battery cells in cases where the current drawn from the battery cells would be sufficiently high for a sufficiently long period of time to cause damage to the battery cells.

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PCT International Search Report in corresponding PCT application #PCT/US07/63619, dated Feb. 15, 2008, 2 pages.

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