How can the service life of the battery pack in the UPS be extended?

Regularly check the terminal voltage and internal resistance of each unit battery. For 12V unit batteries, if it is found that the terminal voltage difference between each unit battery exceeds 0.4V or the internal resistance of the battery exceeds 80m during the inspection, each unit battery should be charged in equalization to restore the internal resistance of the battery And eliminate the terminal voltage imbalance between each unit battery. When equalizing charging, the charging voltage can be 13.5~13.8V. Most of the batteries that have been well-balanced and charged can restore their internal resistance to less than 30m. During the operation of the UpS power supply, the above-mentioned imbalance due to the changes in the battery characteristics of each unit over time cannot be eliminated by the internal charging circuit of the UpS power supply. Therefore, the obvious imbalance of this characteristic has occurred in the battery. If you don’t take the offline equalization process in time, the imbalance will become more and more serious. 2. Re-float the UpS power supply and shut down for more than 10 days. Before restarting, the UpS power supply should be started without load to use the charging circuit in the machine to re-float the battery for more than 10-12 hours and then run with load. The UpS power supply has been in a floating charge state for a long time without a discharge process, which is equivalent to being in a storage standby state. If this state lasts for too long, causing the battery to fail due to long storage, it is mainly manifested in the increase of the internal resistance of the battery, which can reach a few in severe cases. We found that the usable capacity of the battery is about 97% of its rated value after storage at room temperature of 20℃ for 1 month. If it is stored for 6 months, its usable capacity becomes 80% of its rated capacity. If the storage temperature increases, its usable capacity will decrease. Therefore, it is recommended that the user should deliberately unplug the mains input every 20C months, and let the UpS power supply work in a state where the battery supplies energy to the inverter. But this kind of operation should not take too long. When the load is about 30% of the rated output, discharge for about 10 minutes. 3. Reducing the service life of deep-discharged batteries is closely related to the depth of discharge. The lighter the load carried by the UpS power supply, the greater the ratio of the available capacity of the battery to its rated capacity when the mains power supply is interrupted. In this case, when the UpS power supply automatically shuts down due to low battery voltage, the battery is automatically shut down. The depth of discharge is relatively deep. How does the actual process reduce the occurrence of deep discharge of the battery? The method is simple: when the UpS power supply is interrupted by the mains power supply and the battery supplies power to the inverter, most of the UpS power supplies will ring a periodic alarm with an interval of about 4s to inform the user that the battery is now supplying energy. . When the alarm sound becomes rapid, it means that the power supply has been deeply discharged, and emergency treatment should be carried out immediately, and the UpS power supply should be turned off. It is not imperative. Generally, do not let the UpS power supply work until it shuts down automatically due to low battery voltage. 4. Use peak power supply for charging. For users whose UpS power supply has been in low-voltage power supply or frequent power outages for a long time, in order to prevent the battery from being damaged prematurely due to long-term insufficient charging, it is necessary to make full use of the peak power supply (such as late at night) to charge the battery. Ensure that the battery has enough charging time after each discharge. Generally, after a battery is deeply discharged, it takes at least 10 to 12 hours to recharge to 90% of the rated capacity. 5. Pay attention to the choice of charger. The maintenance-free sealed battery used for the UpS power supply cannot be charged with a SCR-type quick charger. This is because this kind of charger will cause the battery to be in a bad state of charge of both instantaneous overcurrent charging and instantaneous overvoltage charging at the same time. This state will greatly reduce the available capacity of the battery, and will cause the battery to be scrapped in severe cases. When using an UpS power supply with a constant voltage cut-off charging circuit, be careful not to set the battery voltage under-voltage protection operating point too low, otherwise, over-current charging is likely to occur in the initial charging stage. Of course, it is best to use a charger with both constant current and constant voltage to charge it. 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 product features of UPS lithium battery packs?