Patent ID: 7800375
Filing Date: 2010-09-21
Classification: G01R

Abstract:
1. A method for estimating a state vector associated with a battery, the method comprising: determining a time interval that the battery has been electrically decoupled from a load circuit utilizing a computer, the time interval starting at a first time; obtaining a first state vector associated with the battery from a memory device, the first state vector being determined prior to the first time; calculating a second predicted state vector associated with the battery based on the first state vector and the time interval; measuring a battery voltage output by the battery to obtain a first battery voltage value after the first time interval when the battery is electrically re-coupled to the load circuit; estimating a second battery voltage value associated with the battery based on the second predicted state vector; calculating a voltage error value based on the first battery voltage value and the second battery voltage value; calculating a third estimated state vector associated with the battery based on the second predicted state vector and the voltage error value; and storing the third estimated state vector in the memory device.