An electric vehicle battery is the power source of the vehicle, but it is a consumable; after some time it shows a lack of power, and usually people choose to replace it. But some say an electric vehicle battery can be repaired. Is that true? Let us tell you!

Repairing an electric vehicle battery is real, but the effect after repair is not great and can only extend use for a while. The batteries used in these vehicles are usually maintenance-free lead-acid batteries, whose life is counted by 300 full charge-and-discharge cycles; these 300 cycles are measured from when the capacity falls to 75% of the rated capacity. This figure matters, because users do not recharge when the battery still has 75% capacity but only when it can hardly be used, by which time the capacity has fallen to 40% of rated, that is, over-discharge has occurred. Once the battery discharges, sulfation begins, and obvious sulfation appears after 12 hours; timely charging can remove mild sulfation. If it is not charged in time, sulfate crystals accumulate and block the felt-like lead micropores inside, increasing internal resistance and shortening the life. In this case, a constant-current, unlimited-voltage pulse desulfation device can be used to remove the sulfur, and the battery water is replaced at the same time to clean out the sulfated material, achieving the purpose of repair.

But after all, the sulfate crystals on all the plates cannot be cleaned completely, so repair lets the battery be used for a while longer but does not fully solve the problem. Moreover, repairing a battery is time-consuming and labor-intensive, and the cost is not low, so it is better to simply buy a new battery.