How to reduce the UPS power failure rate battery pack life

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Through the statistics of various faults in the UPS repair work, this conclusion can be drawn: the rear-pre-collected UPS power supply, the fault caused by the battery exceeds 50% of the total fault. Online UPS power supply, because its circuit design is reasonable, the balance taken by the drive power component capacity. Through the statistics of various faults in the UPS repair work, this conclusion can be drawn: the rear-pre-collected UPS power supply, the fault caused by the battery exceeds 50% of the total fault.

Online UPS power supply, because its circuit design is reasonable, the balance taken by the drive power component capacity, so the power circuit failure rate is very low, compared to the failure rate caused by the battery pack to over 60% or more. It can be seen that correctly use and maintain the battery is one of the key factors that extend battery pack life and reduce the total failure rate of UPS power supply. Regular inspection periodically check the end voltage and internal resistance of each unit battery.

For a 12V unit battery, if the end voltage difference between each unit battery is found in the inspection, the cell battery should be balanced to restore the internal resistance of the battery to restore the internal resistance of the battery by more than 0.4 V or more than 80mΩ or more than 80mΩ. And eliminate end voltage between each unit cell.

The charging voltage takes 13.5 ~ 13.8V when charging.

The vast majority of batteries that have been resolved in a good balanced charge can return its internal resistance to 30MΩ or less. During the operation, the UPS power supply is eliminated by the above-described imbalance of each unit cell characteristic over time, it is impossible to rely again relying on the charging loop inside the UPS power supply, so the battery that has been distinguished in unbearable has occurred. Package, if you do not take the offline, it will become more and more serious.

Re-floating the UPS power downtime for more than 10 days, before rebooting, the UPS power supply should be started under the conditions that are not loaded to re-use the charger of the charging of the charging in the machine to float 10 to 12h or more. The UPS power supply is in a floating state without the discharge process, which is equivalent to the state of "storage.".

If this state continues, it has failed to scrap due to "reservoir" due to "long-term storage", which is desired to increase the internal resistance, and the internal resistance can reach a few Ω. We have found that after 2 months of room temperature, the battery can be used by about 97% of its rated value. If it is stored for 6 months, its use capacity becomes 80% of the rated capacity.

If the storage temperature is increased, its use capacity will decrease. Therefore, it is proposed that the user is best to unplug the mains input every 20 ° C, so that the UPS power supply is operated by the battery supply energy to the inverter. However, this operation should not be too long, and about 30% of the load is about 30% of the rated output, it can be discharged.

Reduce the service life of depth discharge, closely related to it is discharged. The lighter the load of the UPS power supply, the larger the amount of capacity of the electric storage and its rated capacity, the ratio of the ratio of the power storage is, in which case the battery is automatically shut down when the battery voltage is too low due to the low battery voltage The depth of discharge is relatively deep. How does the actual process reduce the battery that the battery is depressed? The way is very simple: When the UPS power supply is in the mainstay of power supply, it is changed from the battery to the inverter.

Most of the UPS power supplies will ring the cyclical alarm sound in the gap 4s, and notify that the user is supplied by the battery. When he heard the alarm sound is urgent, it will illustrate the power supply is already in depth, and should immediately solve the UPS power supply immediately. Not forced, generally don't let the UPS power have been working until the battery voltage is too low and the automatic shutdown ends.

Using the UPS power supply for the UPS power supply for a long time in the market, low-voltage power supply or frequently-changing, it should be prematurely damaged by the long-term charging, and should be fully utilized to charge the battery to ensure the battery. At sufficient charging time after each discharge. When the battery is depressed, it is more than 90% of the rated capacity to at least 10 to 12 h.

Keep an eye-free seal battery for the selected UPS power supply of the charger cannot be charged with a controlled silicon-type "fast charger". This is because this charger will cause the battery to be in the harsh charging state of "instantaneous overflow charging" and "instantaneous transient charging. This state will make the battery greatly decreased, and the battery will be scrapped when it is severe.

When using the UPS power supply of the constant voltage cut-off charging circuit, not to adjust the battery voltage too low protection work point, otherwise, it is prone to overtill charge in the initial stage of charging. Of course, it is best to use a charger that has both constant current, and constant pressure. Ensure that the capacity of the power supply temperature battery is closely related to the ambient temperature.

In general, the performance parameters of the battery are calibrated at room temperature for 20 ° C, and when the temperature is less than 20 ° C, the power storage capacity will be reduced, while the temperature is higher than 20 ° C, it is available The capacity used will increase slightly. Different models of different models of different models are different from the degree of temperature. According to statistics, when at -20 ° C, the battery can only reach around 60% of the nominal capacity.

The impact of visible temperature cannot be ignored. Of course, it is necessary to extend the service life of the battery pack not only pay attention to maintenance, but also consider load characteristics (resistivity, inductance, capacitance) and size when choosing. Don't make the battery in overload operation for a long time, so as not to avoid the battery discharge.

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