Patent ID: 9702940
Date: 2017-07-11
CPC Classifications: B60L,G01R,H01M,H02J,Y02E,Y02T

Claim:
1. A method to determine a state of charge of a battery and charge the battery, wherein the battery includes at least two terminals, the method comprising: selecting a first relationship of an open circuit voltage to an amount of charge in the battery based on or using a state of health of the battery during a first charge cycle; measuring a voltage at the terminals of the battery to generate a first measured voltage; calculating an open circuit voltage of the battery to generate a calculated open circuit voltage using the first measured voltage; determining a first state of charge of the battery based on or using (i) the calculated open circuit voltage and (ii) the first relationship of the open circuit voltage to the amount of charge in the battery; and using the determined state of charge to adjust a charge signal and apply the adjusted charge signal to charge the battery.