What are the methods to repair lead-acid batteries?

2) If the vulcanization of the battery is serious, it can be charged to the highest voltage (6V battery is charged to 7V, 12V battery is charged to 14V), the electrolyte in the battery is drawn out with a syringe, and then distilled water is injected to dilute the electrolyte. After charging for 1 to 2 hours, draw out the electrolyte, inject distilled water, and repeat the above operation until the specific gravity of the extracted electrolyte no longer rises significantly (usually 2~3 times are sufficient). At this time, try to draw out the reverse electrolyte, and then inject sulfuric acid with a specific gravity of 1.25 to 1.28 according to the ambient temperature, and then fully charge the battery after it is discharged. Check the specific gravity of the electrolyte. If the specific gravity is small, the electrolyte can be drawn out again and injected with sulfuric acid to make the specific gravity of the electrolyte reach the standard. Note that the amount of electrolyte injected into the battery should not be too much. After the sponge-like substance in the battery is full of the electrolyte, the excess electrolyte is drawn out, and the repair work is completed. Example: A Sony BP603Ah battery was used as a power source for a 3/4-inch video camera in the 1980s, and the battery was severely vulcanized. After repairing with the above method, the capacity was restored to 2.2Ah. The connecting bridge of some batteries or the lead wires of the battery to the outside are broken (in most cases, the lead wires of the positive and negative electrodes are broken), and the battery cannot work. A deformed battery can only be repaired if the broken part is found. Using the above method of inserting copper-plated coins, use a multimeter to find a battery with an abnormal voltage or a small output current, and the breaking point is on the battery. After finding it, open a hole in the plastic cover at the fracture. The size of the hole is such that the soldering iron can be inserted into the fracture for welding. It should not be too large. After welding, check that the connection is normal, seal the open hole with plastic or epoxy resin, and then use the above method to revive, the battery can be put into work again. If there is a short-circuit fault inside the battery, the short-circuit point can be burned out with low-voltage and high-current. If the active material falls off (shown as brown material in the extracted electrolyte), it indicates that the battery life is over, and this type of battery does not need to be repaired. But if only one or two of the batteries have reached the end of their life, the two batteries can be short-circuited, and the remaining batteries can still be used as lower-voltage batteries. 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: What are the characteristics of lithium batteries?