Battery charging method using battery circuitry impedence measur

Details Battery charging method using battery circuitry impedence measur Battery charging method using battery circuitry impedence measur

1998-07-27

1999-10-19

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With thermal condition detection

320144, 324430, H02N 700

Patent

active

059695080

ABSTRACT:
A charging technique (200) charges a battery pack (102) by taking into account the additional internal circuit impedance of the battery pack. An optimum pack voltage value for the battery pack is calculated (208) based on the rated internal cell voltage as well as the charge current and the internal battery pack circuitry impedance. The battery pack can now be charged such that the internal battery cell voltage is maintained at the rated voltage throughout the charging process. The optimum pack voltage is also updated (220) to account for variations in the battery pack circuitry impedance over temperature (216, 218) as well as variations in charge current (222, 224) during the charging process.

REFERENCES:
patent: 5646508 (1997-07-01), Van Phouc et al.
patent: 5684387 (1997-11-01), Patino
patent: 5905358 (1999-05-01), Fernandez et al.
patent: 5912547 (1999-06-01), Grabon

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