Patent ID: 8497686
Filing Date: 2013-07-30
Classification: G01R,G06Q

Abstract:
1. A method for making a battery value evaluation index, comprising: applying a predetermined charge/discharge pattern to a predetermined battery, detecting a largest state of charge (SOC) value and a smallest SOC value of the predetermined battery, and setting a width between the largest SOC value and the smallest SOC value as “A”; detecting a charge limit SOC value which the battery exhibits when the battery is charged to a charge termination voltage by use of a charge current value at which the predetermined battery shows the highest SOC value, detecting a discharge limit SOC value which the battery exhibits when the battery is discharged to a charge termination voltage by use of a discharge current value at which the predetermined battery shows the lowest SOC value, and setting a width between the charge limit SOC value and the discharge limit SOC value as “B”; and determining that a life of the predetermined battery has ended in the predetermined charge/discharge pattern when a state of B>A has changed into a state of B≦A.