A refresh control system that selectively initiates a refresh charge cycle includes an energy storage device and an electric machine that is operable to charge the energy storage device. A control module monitors a usage period of the energy storage device and determines a bias factor. The control module determines a modified usage period threshold based on a usage period threshold and the bias factor. The control module regulates the electric machine to initiate a refresh charge cycle of the energy storage device when the usage period exceeds the modified usage period threshold.

On-board battery refresh charging
Application Number
Publication Number
Application Date
February 9, 2006
Publication Date
August 16, 2006
Koch Brian J
Tamai Goro
Jeffers Mary A
Frisch Damon R
Zettel Andrew M
cheng tianzheng chen jingjun
Gen Motors
H02J 07/14
H02J 07/00
H01M 10/44