SYSTEM FOR DETERMINING RESIDUAL LIFE OF LEAD-ACID BATTERY FOR MOTOR-DRIVEN FORKLIFT

摘要

PROBLEM TO BE SOLVED: To provide an easily operable residual life determining system reduced in dispersion for a lead-acid battery for a motor-driven forklift. SOLUTION: A voltage value V0 of the lead-acid battery in no load when the battery is fully charged is measured to be stored. Then, a current value I1 flowing in the battery and a voltage value V1 in a locked condition when the motor-driven forklift is tiltedly operated are measured to be stored. A voltage decrease (V0-V1) is found based on the voltage value V0 in the no load and the voltage value V1 in the locked condition. The voltage decrease (V0-V1) is divided by the current value I1 to find an internal resistance value R of the lead-acid battery, and the residual life of the battery is determined using the resistance value R to be displayed.