What are the methods for battery repair

Before the maintenance-free UPS power battery, you must first clean up the dust on the surface of the repaired battery, and remove the dirt and rust on the terminals. 2. Open the exhaust valve and observe the electrolyte inside the battery. Open the glued or heat-sealed battery cover to expose the rubber exhaust valve of the maintenance-free battery. Carefully remove the exhaust valve and save it. Observe the UPS battery Internal situation. Add 0.1% to 0.5% electrolyte to the battery, and there is just flowing electrolyte on the battery. At the same time, check whether there are black impurities. If there are obvious black turbid impurities, the positive plate of the battery has been obviously softened, and the possibility of repairing the battery is relatively small. If there are no black turbid impurities, wait 4 hours for the water to fully penetrate into the battery. If the battery capacity is reduced only because of the long period of inactivity, do not perform this step, and go directly to pre-charging. 3. Pre-charging performs constant-voltage and current-limiting charging for UPS power batteries. That is, at the beginning, charge with a current of 0.1C～0.25C. After reaching 16.2V, the charging voltage is maintained by reducing the current until the charging current drops to 0.03C. Stop charging. Note that when charging, there will be gas and electrolyte overflow from the vent. In order not to pollute the environment, the battery should be placed in a special container. After charging, observe whether there are free molecules inside the UPS battery. If not, add 0.1% solution until a few free molecules appear. If there are free molecules in each cell, use a dumping and pipette to suck out the visible free molecules, so that the battery is in a quasi-lean state. After charging, after the battery is stationary for half an hour, measure the open circuit voltage of the battery. The voltage should be above 12V. If the battery voltage is lower than 12V, especially lower than 10.8V, the battery may have an internal short circuit and the battery has no repair value. 4. Repair and connect the positive and negative output of the repairer to the positive and negative poles of the UPS power battery. Turn on the repairer to repair the battery. The first repair time should not be less than 48 hours. 5. In capacity test, discharge the battery at a current of 0.1C and record the discharge time. The discharge current multiplied by the number of hours of time is the battery repair capacity. If the capacity of the Chongqing battery reaches more than 70% of the nominal capacity, the repair will be completed. If the capacity does not reach 70% of the nominal capacity, continue to charge according to step 3. Continue to repair after charging. Generally, batteries that have been stored for one year beyond the expiration date need to be repaired twice before they can be restored to the state before the expiration date. 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 article: Structure and working principle of lithium iron phosphate battery and charging and discharging process