Ways to maximize the life of battery packs in UPS power supplies

Regularly check the terminal voltage and internal resistance of each battery. For 12V battery cells, if it is found that the voltage difference between the battery terminals of each unit exceeds 0.4V or the resistance of electricity, when it exceeds 80, each battery should be charged and balanced to restore the internal resistance of the battery and eliminate the battery terminal voltage. Imbalance between units. When charging uniformly, the charging voltage is 13.5~13.8v. A good balance charge can resist most of them below 30 meters. During the operation of the UpS power supply, because the characteristics of each unit cell change over time, the resulting imbalance cannot be eliminated by the UpS power charging circuit, so there is an obvious imbalance of the battery pack regarding this feature. Failure to take off-line processing in a timely manner will fill in all the imbalances that are becoming more and more serious. Floating UpS power is off for more than 10 days. Before restarting, the UpS power supply should be started with no load, and the battery that has been floating for more than 10 to 12 hours shall be charged by the internal charging circuit and then run without load. The UpS power supply has been in a floating charging and non-discharging state for a long time, which is equivalent to being in a standby state. If the duration of this state is too long, causing the battery to fail due to storage for too long, it is important to increase the internal resistance of the battery. In severe cases, the resistance can reach a few. We found that the usable capacity of the battery is about 97% of its rated capacity after being stored at room temperature 20℃ for 1 month. If it is not used for 6 months, its usable capacity becomes 80% of its rated capacity. If the storage temperature increases, its usable capacity will also decrease. Therefore, it is recommended that users deliberately unplug the power input every 20C months to allow the UpS power supply to work in a state where the battery supplies energy for the inverter. However, this operation should not take too long. When the load is about 30% of the rated output, it can be discharged for about 10 minutes. Reducing the service life of deep discharge appliances is closely related to the depth of discharge. The lighter the load of the UpS power supply, the greater the ratio of the available capacity of the energy storage to the rated capacity when the power supply is interrupted. In this case, when the UpS power supply is automatically turned off due to low battery voltage, the battery will be discharged to a deeper depth. How does the actual process reduce the chance of deep battery discharge? The solution is very simple: when the UpS power supply is interrupted, the inverter is powered by the battery, and most UpS power supplies will ring a periodic alarm sound 4s gap, notify the user, and now supply Battery. When the alarm sound becomes short, 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. Do not force the UpS power supply to work until the battery voltage is too low and it will automatically shut down. Use peak power charging to provide users with low voltage or frequent power outages for a long period of time. In order to prevent premature battery damage due to long-term insufficient charging, it is necessary to make full use of peak power (such as late at night) to recharge the battery after each discharge to ensure Enough charging time. Under normal circumstances, after the battery is deeply discharged, it takes at least 10~12h to be fully charged to 90% of the rated capacity. 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 should I do when the UPS battery system fails?