What are the precautions in the repair process of electric vehicle batteries

1. Use a multimeter to monitor the voltage and heating condition of each battery at any time. If there is any electrolyte overflow from a certain hole, use a syringe to suck it away at any time to prevent battery short circuit. For individual holes that generate heat and gas and overflow the electrolyte, do not add electrolyte. Replenish the fluid in time with distilled water. Because the heat of individual holes is serious, it is possible that the battery cell has a short circuit, large internal resistance or high electrolyte specific gravity. For the time being, the high electrolyte specific gravity is the priority. Therefore, it is best to keep distilled water without adding concentrated sulfuric acid before repairing. For heating batteries, manually select 3A current charging or battery parallel shunting, or water cooling, fan blowing, etc. to reduce the charging current and temperature rise, because the automatic repair function will automatically use 3A to charge after desulfurization. If it is repaired, Small-capacity storage batteries used in electric vehicles are likely to cause heat generation and electrolyte overflow. Note: The appropriate charge and discharge current should be selected according to the nominal capacity of the battery. 2. During the repair process, if the following phenomena occur, the battery cannot be reused: (1) Always check the temperature of the battery case (you can feel it by touching it), if the temperature of a part is higher than the temperature of other parts, or a certain The cell electrolyte is boiling and gassing is serious (even in the daytime, white gas can be seen from a flashlight with a serious heating, this method is very effective), which indicates that there is a short circuit in the pole plate in the cell. (2) Long time charging failure (the voltage does not rise), after the desulfurization repair, the charging time is more than 10 hours and the charging is not displayed, or a part of the battery is seriously heated. This may be a short circuit inside the battery cell, or It is caused by the plate falling off. The detector must be disconnected. Check the voltage and the stored charge. The battery with too low voltage or low charge (not stored) cannot be used, or a longer repair time is required. (3) After the tester is connected to the battery to start the machine, if the tester fails to output normal voltage and current with creaking, creaking, etc., it means that the internal circuit of the battery has been disconnected and the tester cannot be output normally, and it should be removed at this time. Remove the battery to avoid damage to the detector. (4) The performance of the end of battery life is: 1. The actual capacity of the battery drops below about 60%; 2. The battery heats up severely during charging; 3. The charging is fast (the charging time is greatly shortened) and the discharge is fast (the self-discharge is serious) ; 4. Various performances are greatly reduced, and the performance is extremely unstable, which may cause undesirable consequences: such as deformation of the battery shell during charging, short circuit, open circuit, or even explosion hazard, and more serious, long-term charging without the charger not turning Lights, cause the charger to burn out, cause other fires, etc. Attention should be paid. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How about using lithium ion battery solar street lights in low temperature areas