Vehicular battery charging method

Details Vehicular battery charging method Vehicular battery charging method

2006-07-05

2010-02-09

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

One cell or battery charges another

Vehicle battery charging

C320S160000, C320S161000, C320S162000, C320S155000, C320S157000

Reexamination Certificate

active

07659690

ABSTRACT:
A method for charging a battery pack for an electric vehicle charges at a preselected maximum charging current until the battery pack voltage reaches a reference voltage level. The battery pack is then charged while maintaining the reference voltage until the charging current decreases to a first reference current level. Charging continues at the first reference current level until a time rate of change of the battery pack voltage reaches a first reference time rate of change. The battery pack voltage is determined and whenever the battery pack voltage is less than a decision voltage reference level, the battery pack is further charged at a second reference current level until the time rate of change of the battery pack voltage reaches a second reference value. A manually initiated pack recovery charge routine is also provided to address new battery pack installations.

REFERENCES:
patent: 6710575 (2004-03-01), Youn
patent: 6731096 (2004-05-01), Patino et al.
patent: 6841972 (2005-01-01), Koo

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