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High Reliability Of UPS Battery
Oct 13, 2017

UPS battery life has two metrics, one is the floating life, that is, in the standard temperature and continuous floating state, UPS battery can release the maximum capacity of not less than 80% of the rated capacity of the years used; the second is 80% depth cycle charge and discharge times, that is, full capacity battery discharge rated capacity of 80% and then full of electricity, The number of times this can be recycled. Typically, UPS Battery engineering technicians focus on the former and ignore the latter. 80% depth cycle charge and discharge times represent the number of times the UPS battery actually can be used, in the case of frequent power outages or the low quality of the mains, when the actual number of UPS batteries has exceeded the prescribed cycle charge and discharge times, UPS Battery although the actual use time has not reached the calibration of the floating life, but the UPS battery has actually failed, If can not be found in time, it will bring greater accident hidden trouble. Therefore, in the selection of UPS battery, we should pay attention to the two life indicators, in the condition of frequent interruption of electricity, the latter is particularly important. When choosing UPS UPS battery, we should consider sufficient float life margin. According to experience, the actual service life of UPS battery is often only the $number of the calibration of the floating life. UPS Battery This is because the actual floating life of ups and the definition of standard temperature, the actual ambient temperature, battery charging voltage, the use of maintenance and many other factors. When the actual ambient temperature is higher than the defined standard ambient temperature per 10 ℃, the UPS battery will shorten the floating life by one-time because of the internal chemical reaction speed, so the UPS battery room should be equipped with air-conditioning equipment. UPS Battery In terms of defining the temperature value, the European standard is 20 ℃, China, Japan, the United States and other standards for 25 ℃. 20℃10 annual floating life of UPS batteries such as conversion to 25 ℃ standard, only equivalent to 7-8 years of floating life.

The nominal floating life of UPS battery should be the value of the actual service life of the UPS battery divided by One life factor. This life factor is usually determined by experience, the UPS battery reliability is 0.8, the reliability is low 0.5.

UPS battery can withstand the ripple coefficient in UPS system, UPS battery also plays the role of filter, withstand UPS input ripple voltage and ripple current impact. If the selected UPS battery is less capable of withstanding ripple coefficients, and the ripple coefficients are relatively large, the UPS battery will fail prematurely and cause an inability to discharge. Iecups Battery Standard stipulates that the VRLA should be able to withstand 0.5% of the ripple factor, but the use of UPS occasions, ripple coefficients are relatively large, UPS Battery and some even reached 2%, so the UPS battery can withstand the ripple coefficient according to the actual situation requirements.

Maintenance of UPS Battery

In general, the UPS battery used in UPS is a threshold-controlled sealed battery. Therefore, the maintenance of the battery is limited to ensuring that the operating ambient temperature of the battery is controlled as much as possible in the 20~25 and in a clean and dry working environment. Because the maintenance procedure of the threshold battery and the unsealed battery is completely different, generally speaking, UPS Battery it is not appropriate to perform the "Step-Up equalization" Yidian operation for the sealed maintenance-free battery pack. Because it is a "full charge" Operation method which can do more harm than benefit. The specific operational steps should be carried out in accordance with the requirements of the battery production plant best can be measured at regular intervals (about half a year), UPS Battery recording the battery in the battery cell terminal voltage data, in order to predict the aging trend of the battery.

Maintenance and precautions of UPS battery

Although the maintenance-free UPS battery is used, a certain maintenance is necessary in the broadest sense.

1. High ambient temperature requirements

The working environment is generally required between 20℃-25℃, lower than 15 ℃, its discharge capacity drops, the temperature decreases 1 ℃, its capacity drops 1%, and the temperature is too high (more than 30 ℃) its life will shorten;

2 initial charge of new battery

When the new UPS battery is installed, generally to carry out a longer charge, charging power should be in accordance with the specifications of the charging, after the battery pack charge, a discharge, after the discharge, the purpose is to extend the battery life, improve battery activity and charge and discharge characteristics.

3) to prevent short or deep battery discharge

The depth discharge will cause the battery internal resistance to increase or the charging voltage is too low, which leads to lower or even loses the charging ability, the deeper the discharge degree, UPS Battery the shorter the cycle life; To avoid the large current charge and discharge, otherwise will cause the battery plate expansion deformation, causes the plate active material to fall off, the

4 UPS battery in the ups and downs on a regular basis for long time unused or make UPS battery in the floating state without discharging, lead to a large amount of lead sulfate in the battery to the cathode surface of the battery, the formation of so-called battery cathode plate "sulfate", UPS Battery because lead sulfate is an insulator, Its formation will have a very bad effect on the battery charge and discharge, because the more sulfate formed on the cathode plate, the greater the internal resistance of the battery, the worse the battery can charge and discharge performance, resulting in the battery "aging" and "activity" decline, so that the life of UPS battery greatly shortened. The UPS ' rectifier/charger should be placed in a closed state by interrupting mains or by software/hardware control every 3-4 months, allowing UPS batteries to discharge in UPS. For the battery discharge operation for "activating" the battery, its discharging time is $number suitable for controlling the normal discharging time.

5 try to avoid overcurrent charging

Over-current charging is easy to cause the battery inside the positive and negative plate bending, so that the plate surface of the active material off, UPS Battery resulting in the battery can be used to reduce the capacity, serious will cause the battery internal plate short-circuit and damage.