Reasons affecting the service life of Shuangdeng UPS batteries

At present, maintenance free sealed lead-acid batteries widely used in small and medium-sized UPS power supplies account for as much as 1/4-1/2 of the total cost of UPS power supplies. Moreover, actual maintenance also shows that more than 50% of UPS power supply failures are related to UPS batteries. The failure of Shuangdeng UPS batteries is mainly manifested as insufficient terminal voltage, insufficient capacity, or instantaneous discharge current that does not meet the requirements for on load starting.
The lifespan of a normally used dual UPS battery is about 5 years, but currently a considerable number of UPS batteries in China begin to have problems within less than 1 year of use. In addition, some imported brands of domestic batteries have inherent defects in manufacturing processes, and on the other hand, they are caused by a lack of necessary maintenance in the future. It is worth noting that many users lack necessary testing and maintenance methods and are not aware of the health status of their UPS batteries, which poses a hidden danger to the normal operation of the UPS system.
Although UPS batteries have made significant improvements in structural design and raw material usage compared to the past, and their performance has greatly improved, many maintenance free lead-acid batteries with excellent design and materials have a theoretical lifespan of 15-20 years or more for float charging. However, there are probably very few batteries that can truly achieve such a lifespan during use. There are several reasons for this:
Double entry batteries have strict requirements for their charging equipment when the ambient temperature changes. Due to design flaws in previous charging devices, the normal service life of the battery has been affected.
2. After discharging the double boarding battery, due to the inconvenient use of charging equipment in the past, users were unable to recharge the UPS battery in a timely manner, resulting in significant damage to the battery's lifespan.
3. Temperature has a significant impact on dual UPS batteries, as being too high or too low can lead to a decrease in battery life (high temperature causes overcharging, low temperature causes undercharging), especially high temperature, which has a particularly noticeable effect on battery life. Generally speaking, the ambient temperature should be controlled at around 25 ℃.
4. The depth of discharge also has a significant impact on the service life of UPS batteries. The greater the discharge depth of a double entry battery, the fewer cycles it will be used, so deep discharge should be avoided as much as possible during use. Low current discharge can easily cause deep discharge.
5. Charging current: The charging and discharging current of UPS batteries is generally expressed in C, and the actual value of C is related to the battery capacity. For example, a 100AH battery, C=100A。 Generally speaking, the optimal charging current for maintenance free lead-acid batteries is around 0.1C. Excessive or insufficient charging current can affect the service life of UPS batteries.
6. After using the Shuangdeng UPS battery for a period of time, it should be regularly inspected and maintained according to the quality of the mains power supply. In places with good mains power quality and long-term uninterrupted power supply, the battery should be activated and discharged at regular intervals to prevent the battery from being in a floating charge state for a long time and its activity from deteriorating. The time interval can be once every six months, and the discharge depth is about 30% of the battery capacity.