What are the common faults and repair methods of lithium batteries for electric vehicles?

What are the common faults? ●The electric vehicle has no display, the battery has no output, the battery cannot be charged, etc.; ●The lithium battery charger fails to charge or is not fully charged, the charger does not turn on, the charging time becomes shorter or longer, etc.; ●Lithium battery If the voltage is normal, the power will be cut off when the riding distance is short, and the riding will resume after a short period of time. The cycle appears to be good and bad; ●The lithium battery cannot work normally caused by the damage of the lithium battery protection board itself, and the battery protection board does not work. Some of the battery cells are damaged, etc. Repair method 1. Regrouping: After the entire battery pack is damaged, we often perform charge and discharge tests on the lithium batteries of electric vehicles. During the inspection, it is often found that 50% of the batteries in a group of batteries are not damaged. The reason is that in the series-connected battery pack, individual batteries lag behind, resulting in a decline in the function of the entire battery pack, so that the function of the entire battery pack is reduced. 2. Water replenishment: A replenishment of the battery used for the lithium battery of electric vehicles for about 4 months can prolong the service life of the battery and extend the time evenly to more than 3 months. It should be noted that after each refilling, the battery is in an overcharged state to turn the battery from a quasi-lean liquid to a lean-liquid state, and this overcharge is good for improving the battery capacity. 3. Eliminate vulcanization: use battery repair equipment to eliminate vulcanization of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.