Common UPS battery failures in life, and some resolution analysis

　　Author ：Iflowpower – Portable Power Station Supplier

In life, you may have touched a wide variety of electronic products, then you may not know some of its components, such as the UPS power supply it might contain, then let Xiaobian lead everyone to learn the UPS power failure and deal with. 1. Using a user who charges a peak charging for long-term use of low voltage power supply or UPS power supply, it is necessary to prevent battery from being damaged by long-term insufficient charging, it is necessary to make full use of power peaks (eg late night) for battery to ensure each time After that, discharge the battery.

There is sufficient charging time thereafter. Typically, after the battery depth is discharged, at least 10 to 12 hours can charge 90% of the rated capacity. Pay attention to the choice of charger.

The maintenance-free sealing battery of the UPS power supply cannot be charged with SCR type "fast charger". This is because this charger will cause the battery to be in "instantaneous overcurrent charging" and "instantaneous overvoltage charging" state. This state will greatly reduce the available capacity of the battery, in severe cases, the battery will be scrapped.

When using a UPS power supply with a constant voltage shut-off charging circuit, please pay attention not to set the battery voltage too low, the protection work point cannot be too low, otherwise, it is easy to cause overcurrent charging in the early stage of charging. Of course, it is best to use an existing constant current, there is a constant voltage charger to charge it. 2, to ensure that the power supply temperature battery is closely related to the ambient temperature.

Typically, the performance parameters of the battery are calibrated under conditions of room temperature of 20 ° C. When the temperature is less than 20 ° C, the available capacity of the battery will decrease; when the temperature is higher than 20 ° C, the available capacity of the battery will decrease. The capacity used will be slightly added.

Different types of batteries from different manufacturers will be affected by different degrees of temperature. According to statistics, at -20 ° C, the available capacity of the battery can only reach around 60% of the nominal capacity. It can be seen that the effect of temperature cannot be ignored.

3, regular inspection periodically check the terminal voltage and internal resistance of each unit battery. Regarding the 12V battery unit, if the end voltage difference between each battery unit is exceeded by 0.4V or the internal resistance of the battery exceeds 80 MΩ during the inspection, the battery unit should be balanced to restore the internal resistance of the battery.

And eliminate the terminal voltage between each unit battery. When equilibrium charging, the charging voltage can be 13.5 ~ 13.

8V. Most batteries that balance and full of electricity can restore their internal resistors below 30MΩ. During operation of the UPS power supply, the above imbalance cannot be eliminated by the charging circuit inside the UPS power supply.

Therefore, the battery with this characteristic has a significant imbalance. If the group does not use offline equilibrium in time, its imbalance will become more and more serious. 4.

Re-floating the UPS power supply Using the circuit of the electronic product to fill the battery 10 to 12 hours, then run in the case of load. The UPS power supply is in a floating charging state without the discharge process, which is equivalent to "storage available status". If this is too long, the battery will fail due to "too long storage time", which is important as the new internal resistance of the battery, and in some cases a few Ω.

After 1 month, it was found that after 1 month at room temperature of 20 ° C, the available capacity of the battery was approximately 97% of its rated value. If it was stored for 6 months, its available capacity becomes 80% of its rated capacity. If the storage temperature rises, its available capacity will be reduced.

Therefore, it is recommended that the user is unplugged once every 20 ° C per month, and the UPS power supply works in a state where the battery is powered by the inverter. But this kind of operation should not cost too long. When the load is approximately 30% of the rated output, please discharge about 10 minutes.

5, reduce the service life of deep discharge power is closely related to the depth of discharge. The lighter the load of the UPS power supply, the greater the ratio of the battery's available capacity and its rated capacity when the power is interrupted. In this case, when the UPS power is automatically turned off due to low battery voltage, the battery will close.

Deep discharge depth. How does the actual process reduce the occurrence of battery depth discharge? This method is very simple: Most UPS power supplies will sound once at approximately 4s when the UPS power is interrupted when the UPS power is interrupted, and the battery is switched to the inverter power state. Regular alarm sound to notify the user that the battery is supplying energy.

When the sound of the police sound rapidly, it indicates that the power supply has been severely discharged, and it should be urgently treated immediately, and the UPS power should be turned off. This is not unable to prevent. Typically, do not work before the battery voltage is automatically turned off, do not work before the battery voltage is low.