LITHIUM-ION BATTERY CAPACITY RECOVERY METHOD

A method for recovering the capacity of a lithium ion battery determines whether or not the cause of degradation is a decrease in lithium ions; calculates the amount of the decrease in lithium ions; and connects a lithium ion replenishing electrode to a positive electrode or a negative electrode to release lithium ions corresponding to the amount of the decrease from the lithium ion replenishing electrode, thereby replenishing the lithium ion battery with lithium ions for recovery of the battery capacity.