Battery monitoring arrangement having an integrated circuit...

Details Battery monitoring arrangement having an integrated circuit... Battery monitoring arrangement having an integrated circuit...

2005-09-30

2008-08-26

Tso, Edward (Department: 2838)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

Reexamination Certificate

active

07417405

ABSTRACT:
A battery monitoring device of a battery pack configured for powering a cordless power tool may include an integrated circuit connected to a microprocessor of the pack that is external to the integrated circuit, and which is connected to each of N battery cells of the pack. The integrated circuit may be configured to take, singly or sequentially, a sampled reading comprising one of an individual cell voltage or a total pack voltage for all cells in the pack. The sampled reading is filtered in the integrated circuit prior to being read by the microprocessor.

REFERENCES:
patent: 5438250 (1995-08-01), Retzlaff
patent: 5952815 (1999-09-01), Rouillard et al.
patent: 6208117 (2001-03-01), Hibi
patent: 6268710 (2001-07-01), Koga
International Search Report and Written Opinion dated Mar. 27, 2007.

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