Receding horizon regression analysis for battery impedance parameter estimation

摘要

A hybrid vehicle includes a battery pack having one or more cells and a controller configured to continuously update battery model parameter values based on generalized linear regression analysis. The analysis updates the parameters using a dataset of independent variable vectors and a dependent variable vector constructed from a series of input currents to the battery pack and corresponding voltage responses of the battery pack that fall within a moving window.

主权项

1. A vehicle comprising:
a traction battery; and a controller configured to
output impedance parameters associated with the battery based on regressions of battery input current data and corresponding battery output voltage data falling within a sliding window having a temporal size;output a power capability for the battery defining maximum and minimum power limits based on the impedance parameters; andoperate the battery to maintain power associated with the battery within the limits.