Patent ID: 8854003
Filing Date: 2014-10-07
Classification: G01R

Abstract:
1. A method of testing the discharge capacity of a battery comprising the steps of: discharging the battery at a first discharge rate until a first cutoff potential of the battery is reached; allowing the battery to relax during a first relaxation period; discharging the battery at a second discharge rate lower than the first rate until a second cutoff potential of the battery is reached; allowing the battery to relax during a second relaxation period the same or longer than the first relaxation period; discharging the battery at a third discharge rate lower than the second rate until a third cutoff potential is reached; allowing the battery to relax during a third relaxation period the same or longer than the second relaxation period; and continuing with further discharges of the battery at successively lower discharge rates with at least some increasingly longer relaxation periods following the further discharges until the battery is substantially exhausted; wherein a cumulative value of all of the discharges is taken as a tested capacity of the battery.