How to repair lithium-ion batteries in electric vehicles?
1. First, determine the operating voltage of the lithium-ion battery, which is generally 48V or 24V. Then, locate each node of the battery pack and measure the individual voltage to check if it is normal. Under normal circumstances, the individual voltages should be consistent. If different voltages are found, it indicates that there may be a problem with that battery pack.
2. Battery sulfation faults can be repaired using a repair device. By measuring the battery's condition, it continuously emits positive and negative frequency-converting microparticle waves during charging and discharging. After approximately 15 hours, the hardened lead sulfate crystals in the battery can be removed. However, it should be noted that this repair method for electric vehicle lithium-ion batteries is generally only suitable for mild sulfation. If the sulfation is severe, the battery must be replaced.
3. For battery plate softening faults, discharge the battery to 10.5V, then use a light bulb for deep discharge for 1 to 5 hours. Then use an activator to reactivate and repair it. This has a certain chance of repairing the electric vehicle lithium-ion battery, but in severe cases, replacement is the only option.
4. Multiple series and multiple parallel method: Generally, a DC power supply is used to supplement the low voltage batteries one by one, or a load device is used to lower the voltage of the high voltage batteries one by one to achieve the effect of battery voltage balance. If the voltage difference is tens of millivolts, charging or discharging is not easy to operate. Someone needs to be present to prevent the batteries from being overcharged or undercharged. Obviously, this repair method is very inconvenient and inefficient. Only a few sets of lithium-ion batteries can be repaired in a day.
