Repairing batteries using electric vehicle battery chargers:
The voltage and current of an electric vehicle charger must be matched to the model and specifications of the electric vehicle battery. Therefore, the charger provided with the vehicle cannot repair the battery pack; a higher-power electric vehicle charger is required. For example: 1. A 48V 20AH electric vehicle battery pack can be repaired using a 60V 20AH battery charger; 2. A 48V 12AH battery pack can be repaired using a 48V 20AH battery charger.
Repair Principle: A major reason for battery performance degradation is sulfation. Battery manufacturers' after-sales maintenance and various battery repair devices on the market all use high-power charging equipment with high current and high voltage to desulfate and repair the battery. Therefore, a standard charger with slightly higher power can desulfate and repair the battery.
Other methods:
Repairing batteries with hot water from a dry cleaner
Many electric vehicle users are aware that their electric vehicles have limited range and require the addition of distilled water to maintain and repair the battery. However, commercially available purified water and various supplementary and repair solutions only provide temporary relief before accelerating battery performance degradation and premature failure. This is because these liquids contain metal ions and impurities that corrode the battery plates, causing self-discharge and the shedding of active materials, ultimately rendering the battery permanently unusable.
1. Re-grouping: After the entire battery pack is damaged, we often perform charge and discharge tests on the lithium-ion batteries of electric vehicles. During the inspection, we often find that 50% of the batteries in a group are not damaged. The reason is that in the series-connected battery pack, the failure of individual batteries causes the overall battery pack's function to deteriorate, resulting in a decline in the overall battery pack's performance.
2. Water Replenishment: Replenishing water on a lithium-ion battery in an electric vehicle after approximately four months of use can extend its lifespan by an average of three months or more. It should be noted that each water replenishment process involves overcharging the battery, transitioning it from a near-starved state to a starved state. This overcharging is beneficial for increasing battery capacity.
3. Desulfation: Battery repair equipment is used to desulfate the batteries.
4. Microparticle generator: A microparticle generator is connected in parallel to the battery to repair it. This method is good for repairing lithium-ion batteries in electric vehicles. However, because the repair is quite thorough, it often completely eliminates the possibility of battery sulfation for electric vehicle lithium-ion batteries that are not over-discharged and are intended for continued use.
