Patent ID: 8315829

Claim:
An on-board battery state-of-health monitoring and prognosis apparatus for a vehicle comprising an engine, comprising: a signal preprocessing module for extracting portions of on-board battery terminal voltage and current signals after an initial voltage drop during an on-board engine cranking process; a memory storage device for recalling parity-relation parameters between battery voltage and current signals derived during off-line battery discharge events corresponding to at least one off-line battery capable of delivering a desired power to crank the engine, wherein the parity-relation parameters are trained using a linear regression model; a voltage estimation module for estimating battery voltage of said an on-board battery based on recalled parity-relation parameters and the extracted portions of the on-board battery current signals extracted during the on-board engine cranking event; a diagnostic residual generation module for generating a diagnostic residual defining a deviation between the estimated battery voltage of the on-board battery and the extracted portion of the on-board battery terminal voltage signals; and a residual evaluation module for providing a measure of battery state-of-health based on said diagnostic residual.