Maintain appropriate ambient temperature. The important factor affecting the life of the battery is the ambient temperature, the general battery manufacturers require the best ambient temperature is between 20-25 ℃. Although the temperature rise on the battery discharge ability to improve, but the price to pay is the battery life is greatly shortened. According to test measurements, once the ambient temperature exceeds 25 ℃, every 10 ℃, the battery life will be shortened by half. Failure to meet the specified environmental requirements, the length of its life is a big difference. In addition, the increase in ambient temperature will lead to increased chemical activity within the battery, thus generating a large amount of heat, which in turn will contribute to the surrounding environmental temperature rise, this vicious circle, will accelerate the shortening of battery life. Regular charging and discharging, UPS power supply in the float voltage and discharge voltage, in the factory have been debugged to the rated value, and the size of the discharge current is increased with the increase in load, the use of the load should be reasonably adjusted, such as controlling the use of microcomputers and other electronic equipment. In general, the load should not exceed 60% of the rated load of the UPS. In this range, the battery discharge current will not appear excessive discharge.UPS for a long time with the utility connected to the high quality of power supply, rarely occurs in the use of utility power outages in the environment, the battery will be in a long-term floating charging state, over time will lead to a reduction in the activity of the battery chemical energy and the conversion of electrical energy, accelerate aging and shorten the service life. Therefore, generally every 2-3 months should be fully discharged once, discharge time can be determined according to the capacity of the battery and load size. After a full load discharge is completed, charge again for more than 8 hours as required. Utilize the communication function. Most large and medium-sized UPS are equipped with microcomputer communication and program control and other operable performance. In the microcomputer to install the appropriate software, through the serial/parallel port connected to the UPS, run the program, you can use the microcomputer to communicate with the UPS. It generally has the functions of information query, parameter setting, timer setting, automatic shutdown and alarm. Through the information query, you can obtain information such as utility input voltage, UPS output voltage, load utilization, battery capacity utilization, temperature inside the machine and utility frequency, etc.; through the parameter setting, you can set the basic characteristics of the UPS, the battery can be maintained for a period of time and the battery exhaustion alarm, etc.. Through these intelligent operations, greatly facilitates the use of UPS power supply and its battery management. Timely replacement of waste / bad battery. Large and medium-sized UPS power supplies are equipped with a number of batteries, ranging from 3 to 80, or even more. These individual batteries are connected through the circuit to form a battery pack to meet the needs of the UPS DC power supply. In the continuous operation of the UPS in use, due to performance and quality differences, individual battery performance degradation, the storage capacity does not meet the requirements and damage is inevitable. When the battery pack in a / some of the battery damage, maintenance personnel should be checked on each battery test, to exclude damaged batteries. Replacement of new batteries, should strive to purchase the same manufacturer with the same type of battery, prohibit acid-proof batteries and sealed batteries, different specifications of the battery mixed use. Routine maintenance In the process of using the uninterruptible power supply system, people tend to one-sidedly think that the battery is maintenance-free and do not pay attention to. However, some data show that due to battery failure caused by the UPS host failure or abnormal work of the proportion of about 1 / 3. It can be seen that, to strengthen the correct use of UPS batteries and maintenance, to extend the service life of the battery to reduce the failure rate of the UPS system, has an increasingly important significance. In addition to the selection of regular brand batteries, should start from the following aspects of the correct use and maintenance of the battery:
(1) dust into the machine deposition, when the air humidity will cause the host control disorders caused by the host malfunction, and inaccurate alarms, a large amount of dust will also cause the device is not good heat dissipation. Generally every quarter should be thoroughly cleaned. The second is in the dust, check the connectors and plugs have no loose and contact with the situation.
(2) Although the energy storage battery packs are used maintenance-free battery, but this is only exempted from the previous measurement of the ratio, proportioning, adding distilled water at regular intervals. But the external cause of the working condition of the battery has not changed, abnormal working condition of the battery caused by the impact of the battery has not changed, this part of the maintenance and repair work is still very important, a large number of UPS power supply system maintenance and repair work is mainly in the battery part. All the work of the energy storage battery is in the float state, in this case at least once a year should be discharged. Discharge before the battery pack should be equalized charging, in order to reach the whole group of battery equalization. To be clear before the discharge of the battery pack has been the existence of backward batteries. If one of the batteries reaches the discharge termination voltage during the discharge process, the discharge should be stopped and continued to eliminate the backward batteries before discharging. Reconciliation of the discharge, not the first pursuit of discharge capacity of how many percent, but to focus on the discovery and treatment of backward batteries, after the backward batteries to deal with and then make the verification of the discharge experiment. This can prevent accidents, so as to avoid the backward battery in the discharge deterioration of the reverse pole battery. Normally, each group of batteries should be at least 8 batteries as a labeled battery, as a reference to understand the working condition of the whole battery group, the labeled battery should be measured regularly and make records. Daily maintenance of the items to be frequently checked are: clean and test the battery voltage, temperature; connections have no loose, corrosion phenomenon, test the connection bar pressure drop; battery appearance is intact, there is no shell deformation and leakage; poles, safety valves around the escape of acid mist; host equipment is normal. Maintenance-free battery to maintain, not some nonsense, should be from a broad position of maintenance, to achieve the operation, daily management of thoughtful, meticulous and standardized to ensure that the equipment (including the host equipment) to maintain good operating conditions, thereby prolonging the life of the use of the equipment; to ensure that the DC bus often maintains the qualified voltage and battery discharge capacity; to ensure that the battery operation and the safety and reliability of personnel. This is the purpose of battery maintenance, but also the battery operating procedures included in the content and conduct rules. (3) When the UPS battery system failure, you should first identify the cause, distinguish between the load or the UPS power system; is the host or the battery pack. Although the UPS host has a fault self-test function, but it is opposite and not to the point, it is very convenient for the replacement of parts, but to repair the point of failure, it is still necessary to do a lot of analysis, testing work. In addition, if the self-test part of the failure, the display of the fault content may be wrong.
(4) on the host breakdown, broken insurance or burnt device failure, must identify the cause and troubleshooting before restarting, otherwise the same failure will occur one after another.
(5) when the battery pack found in the voltage reverse polarity, voltage drop, pressure difference and acid mist leakage phenomenon of the battery, should be used in a timely manner to restore and repair the appropriate methods, can not be restored and repaired to be replaced, but can not be different capacity, different performance, different manufacturers of batteries linked together, otherwise it may be the whole group of batteries adversely affect the battery. The life of the battery pack has expired to be replaced in a timely manner so as not to affect the host. UPS as a protective power supply equipment, its performance parameters are of great significance and should be the focus of consideration when we buy. Wide range of utility voltage input, it shows that the utilization of utility power is strong (reduce battery discharge). Output voltage, frequency range is small, it shows that the utility to adjust the ability of strong, stable output. Waveform distortion rate is used to measure the stability of the output voltage waveform, while the voltage stability indicates that when the UPS is suddenly added to the full load from zero load, the stability of the output voltage.
And UPS efficiency, power factor, conversion time, etc. are important parameters that characterize the performance of the UPS, determines the protection of the load and the utilization of utility power. The better the performance, the stronger the protection ability, in general, the offline UPS load protection is the worst, online interactive slightly better, online can solve almost all the common power problems. Of course, the cost also rises with the performance enhancement. Therefore, when purchasing a UPS, users should select different types of UPSs according to the degree of power requirements and the importance of the load.