How to extend the battery life of UPS

How to extend the battery life of UPS Online UPS power supply has a reasonable circuit design, large drive power components, and a very low failure rate. In contrast, the failure rate caused by battery packs rose to more than 60%. It can be seen that the correct use and protection of batteries is one of the key factors to extend battery life and reduce the overall failure rate of UPS power supplies. 1. Check the time to check the terminal voltage and internal resistance of each battery in time. For 12V battery cells, if the test finds that the unit battery terminal voltage difference exceeds 0.4V and its internal resistance or power exceeds 80, each battery should be charged and balanced, the battery internal resistance should be restored and the battery terminal voltage difference between each unit should be eliminated. balance. The charging voltage can reach 13.5~13.8v when charging is equalized. The internal resistance of the battery can be restored to less than 30 meters by processing the most beautiful equalizing charge of the battery. During the operation of the UPS power supply, because the imbalance of each unit cell characteristic changes over time, it can no longer rely on the internal charging circuit of the UPS power supply to eliminate it. Therefore, the battery pack with obvious imbalance characteristics, if it is not taken in time Offline processing, filling up all the imbalances become more and more serious. 2. Floating from overhead to overhead, the UPS power supply should be turned off for more than 10 days. Before starting from scratch, it is recommended to use UPS power supply, use the charging circuit in the machine, charge the battery for more than 10~12h from scratch, and then load. The UPS power supply is in a floating charge state for a long time without a discharge process, which is equivalent to being in a standby state. Assuming that this situation lasts too long, the failure of the obsolete battery due to the long storage time, its first performance adds to the internal resistance of the battery, and the serious internal resistance can reach several. We found that at a room temperature of 20°C, the usable capacity of the battery after storage for 1 month is about 97% of its added value, assuming 6 months of storage without use, its usable capacity becomes 80% of its added value. Assuming that the storage temperature increases, its usable capacity will decrease. Therefore, it is recommended that the user deliberately unplug the power input every 20C months to make the UPS power supply work with the battery powering the inverter. However, this operation should not be too long. When the load is about 30% of the additional output, the discharge is about 10 minutes. 3. Reduce the depth of discharge The life of the battery is closely related to the depth of discharge. The lighter the UPS power load, the greater the ratio of the available capacity of the energy storage power supply to the additional capacity when the main power supply is interrupted. In this case, when the UPS power supply is turned off due to the low battery voltage, the battery discharge depth will be deeper. How to reduce the occurrence of battery deep discharge during the exercise? The method is very simple: when the UPS power supply is in a power interruption state, the battery supplies power to the inverter power supply, and most UPS power supplies will be cleared of the periodic alarm sound in the 4s circle to tell the user It is now powered by batteries. When the alarm sound becomes shorter, it indicates that the power supply is in a deep discharge state, and emergency treatment should be carried out immediately, and the UPS power supply should be turned off. There is no need, generally do not let the UPS power supply run, until the battery voltage is too low and active shutdown can be completed. 4. Use power peak charging. Regarding the user's UPS power supply is low-voltage or frequent power outages for a long time, in order to prevent prematurely damaged batteries due to lack of charging for a long time, the power supply peak (such as midnight) should make full use of rechargeable batteries to ensure Satisfactory charging time after each battery discharge. Under normal circumstances, after the battery is deeply discharged, it needs to be recharged with 90% of the extra capacity at least 10~12h. 5. Pay attention to the choice of charger The unprotected sealed battery used for UPS power supply cannot be charged with SCR fast charger. This is because this kind of charger combines the battery to form a bad charging condition for instantaneous overcurrent charging and instantaneous overvoltage charging. This situation will greatly reduce the usable capacity of the battery, and seriously cause the battery to be scrapped. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.