【 Weak current College 】 UPS battery use and maintenance

1. Overview

UPS system battery is an important component, it merits a direct relationship to the entire UPS system reliability, but the battery but the entire UPS systems mean time between failures (MTBF) is the shortest of a device. If the user can correct use and maintenance, will be able to extend its service life, the life will be shortened considerably.

Battery types generally can be divided into lead-acid battery, maintenance-free lead-acid batteries and nickel-cadmium batteries, batteries, and their respective characteristics species as follows: overview advantages and disadvantages lead-acid battery

general type battery, also known as automotive battery required water maintenance expectancy 1 ~ 3 years

will produce hydrogen charging and discharging, settlements shall exhaust tube so as to avoid the risk of electrolyte acidic, will corrode metal required regular water maintenance of affordable

maintenance-free lead-acid batteries battery

new batteries do not need to add water expectancy generally 5 ~ 7 years

sealed charging will not have any harmful gases display easily, no need to consider relocation ventilation problem-free maintenance, maintenance-free characteristics of high discharge rate, stable prices higher

nickel-cadmium batteries

advanced batteries for special occasions or special equipment needed water life expectancy of 20 to 40 years

water as the medium, charge and discharge does not produce harmful gas loss rate is low, but requires a fixed time plus water and maintenance discharge characteristics best can be placed on the price of any harsh environment is extremely high

santak UPS considering the load conditions, the use environment, service life and cost and other factors, the General choice of lead-acid battery maintenance-free batteries. Santak UPS standard machine built-in battery for Panasonic lead-acid battery maintenance-free, uses an external battery also recommended the use of maintenance-free lead-acid batteries Panasonic or any other brand of high-quality maintenance-free batteries. Users must not use Pidgin cheap and shoddy battery, because this will affect the overall system reliability, and can thus lead to greater losses.
2. battery check

Battery will have a self-discharge phenomenon (SELF-D1SCHARGE), if you do not have long-term placement makes the energy lost, therefore need regular charge and discharge. Engineers can measure battery open-circuit voltage to determine if the battery is good or bad, to 12V battery, for example, if the open-circuit voltage higher than 12.5V, indicates that the battery has 80 percent of energy storage, if the open-circuit voltage lower than 12.5V, you should immediately be supplementary charge, if the open-circuit voltage lower than 12V, battery storage power less than 20 percent, the battery is unusable.

Maintenance-free battery electrolyte absorption due to the adoption, in the normal use of the system does not produce any gas, but if users make
Used incorrectly, causing the battery overcharge, gas, battery will increase the internal pressure, the pressure valve on the battery, top open serious cause the batteries to drum up, deformation, rupture, leakage or even these phenomena can be judging from his appearance, as found above, should immediately replace the battery.
3. use and maintenance

Although the maintenance-free battery in use do not need artificial to specialized maintenance work, but when used, or have certain requirements, if improperly used can affect battery life.
Affect the battery life of factors include the following: install, temperature, charging current and charging voltage, discharge depth and long-term charging, etc.

1) battery installation
The battery should be installed on a clean, cool, ventilated, dry place, and to avoid the Sun, heater or other radiation source. The battery should just stand placement, not tilt angle. Each battery is securely attached to between terminals.

2) ambient temperature
Environmental effects of temperature on the battery, the ambient temperature is too high, will enable battery overcharge produce gas, environment temperature is too low, you
Cause the battery charge is insufficient, it will ring for battery life. Therefore generally require ambient temperature 25℃, santak UPS floating charge voltage value is set according to the temperature.

3) charge-discharge current
Battery charging and discharging current General to C to represent the actual value of the C and battery capacity. For example, if the batteries 100AH: C = 100A. Maintenance-free lead-acid batteries Panasonic's best charge current to charge current 0.1C, must not be greater than 0.3C. Charging current is too large or too small can affect battery life. Discharge current General requirements in 0.05 ~ 3C, UPS in normal use can meet this requirement, but also to prevent the occurrence of unexpected situations, such as short circuit the battery.

4) charging voltage
Due to the UPS battery is an alternate way of working, the commercial power supply under normal circumstances is charging status, only the outage will discharge. To extend battery life, santak UPS battery charger generally use ·drive control after the battery is fully converted into floating State, each section is floating charge voltage set to 13.7V. If the charging voltage of the battery overcharge, on the other hand makes the battery charge is low. Charging voltage anomalies is probably caused by the battery is incorrectly configured, or the charger fault, so when you install the battery, it is important to note that the number of battery specifications and accuracy, with different sizes, different lot numbers of batteries don't mix. Do not use external charger, and poor quality charger installed thermal issues to consider when.

5) discharge depth
Depth of discharge of the battery life is also very large, battery discharge depth deeper, its recycling, the fewer times, when in use to avoid deep discharge. Although santak UPS has the protection function battery low, generally single battery discharge to 10.5V left, UPS will automatically shut down, but if the UPS is in a no-load speed of discharge or discharge, can have a depth of discharge of the battery.

6) regular maintenance
The battery inUse after a certain period of time should be regularly checked, such as observation of their appearance is abnormal, measure the voltage of the battery is average, etc; if the long-term power outages, the battery would have been at the charging status of the battery, it activated variation even without power, UPS also need periodic discharge test for battery maintenance activity.

Discharge test usually three-monthly, is the UPS load-the best in more than 50%, and then disconnect the power supply, UPS Office
To the battery discharge status, discharge duration depending on the battery capacity is generally for a few minutes to several tens of minutes, inverter, after continued to charge the battery.