Battery UPS systems are an important part of its direct bearing on the merits of the entire UPS system reliability. No matter how UPS designed for advanced features complete how, once the battery failure, even the best UPS is also unable to provide uninterrupted power supply. Do not use cheap and inferior quality due to covet lead-acid batteries, it will affect the whole UPS system reliability, and will therefore result in greater losses. The entire UPS system Inspiron 1100 battery,Inspiron 1150 battery mean time to failure (MTBF) the shortest part. If the proper use and maintenance, will be able to extend its life, instead of its service life will be shortened. Therefore, we must understand the basic principles and the use of battery considerations.
Lead-acid batteries
Types of batteries in general can be divided into lead-acid batteries, maintenance-free lead-acid batteries and nickel-cadmium batteries, taking into account the load conditions, the use of the environment, life and cost and other factors, UPS generally opt for valve-regulated lead-acid maintenance-free battery. Its main feature is the charge generated when the cathode-board oxygen through chemical reaction in the negative plate reduced to water, use the specified float lifetime without adding water to maintain, so-called maintenance-free lead-acid batteries. Maintenance-free battery is only when compared with the normal use of the process eliminates the need to add water or distilled water, adjust the electrolyte surface of the work is not relieved of all maintenance work. On the contrary, in order to achieve the UPS uninterrupted power supply, we must be more careful in safeguarding and maintenance of a good lead-acid maintenance-free batteries.
The main factors that affect the life and precautions
Here’s what the major factors affecting battery life and use of the process should pay attention to matters:
⑴ ambient temperature greater impact on the battery. The ambient temperature is too high, the battery will overcharge produces gas, the ambient temperature is too low, then the battery will charge enough, it will affect battery life. Therefore, the general requirements of the ambient temperature at 25 ℃ or so, UPS also operate float voltage temperature setting. Practical applications, the battery is generally 5 ℃ ~ 35 ℃ within the charge, below 5 ℃ or above 35 ℃ will greatly reduce the battery capacity and shorten battery life.
⑵ depth of discharge of the battery life also has great influence. The deeper the battery depth of discharge, the fewer the number of its recycling, and therefore should avoid the use of depth of discharge. Although the UPS has a battery low potential protection, the general single-cell, when discharged to 10.5V or so, UPS will automatically shut down. However, if the UPS is in light-load or no load discharge discharge cases, may cause the battery depth of discharge.
⑶ batteries Inspiron 1300 battery,Inspiron 1420 battery in storage, transportation, installation process, a result of loss of part of the self-discharge capacity. Therefore, after installation before put into use should be based on the open circuit voltage of the battery to determine the remaining battery capacity, then a different approach to supplement charging of the batteries. Set aside for spare batteries, every 3 months should be a supplementary charge. Can be by measuring the battery open circuit voltage to determine if the battery is good or bad. To 12V battery, for example, if the open circuit voltage is higher than 12.5V, the battery energy storage, said there are more than 80%, if the open circuit voltage lower than 12.5V, you should immediately supplement charge. If the open circuit voltage less than 12V, the battery stores electrical energy, said less than 20%, the battery unserviceable.
⑷ battery charge and discharge currents generally C expressed, C the actual value related to battery capacity. For example, 100AH batteries, C = 100A. Matsushita Lead-acid maintenance-free battery charging current is 0.1C best around, the charge current can not exceed 0.3C. Charge current is too large or too small will affect the battery life. The discharge current general requirements in 0.05C ~ 3C between, UPS in normal use can satisfy this requirement, but it should also prevent the occurrence of unexpected situations, such as the battery short-circuit and so on.
⑸ charge voltage. As part of UPS battery backup works, electricity is in charge state under normal circumstances, only the power outage will discharge. To extend battery life, UPS chargers generally use the constant pressure limiting control over the way, the battery is full to float charge after state, each section about float voltage is set to 13.6V. If the charging voltage is too high will cause the battery before charging, the battery will charge less than the contrary. Charging voltage anomaly may be caused by configuration errors caused by the battery or charger malfunctions due. Therefore, when installation of the battery, the battery must pay attention to the correctness of the specifications and quantities of different specifications, different batches of cells do not mix. Do not use inferior charger plus a charger, but also to consider when installing heat dissipation problem. At present, in order to further improve the battery life, and advanced UPS have adopted a kind of ABM (Advanced Battery Management) three-stage intelligent battery management program, that is, charge is divided into initialization charge, floating charge and rest three stages: the first stage is constant flow equilibrium charge, charge the battery capacity to 90%; second stage is floating Chong Chongdian charge the battery capacity to 100%, and then stop charging; third stage is a natural discharge, at this stage, the battery using its own leakage current discharge, until the minimum voltage required, and then repeat the above three stages. In this way the kind of changes that were previously fully charged even after the battery in the 24h day of the float state, thereby extending battery life.
As a result of ⑹ maintenance-free Inspiron 1501 battery,Inspiron 1520 battery electrolyte absorption system, in normal use will not produce any gas, but if the user used improperly, causing the battery before charging, it will produce gas, this time pressure will increase the battery, the battery pressure valve on top of open, serious cause battery burst.
⑺ UPS running the process, pay attention to monitor the battery terminal voltage value, float current value, each battery voltage, battery and the DC bus to ground resistance and insulation status.
⑻ not individually increase or decrease in the number of single cell battery load, which will result in the capacity of single battery charge imbalance and uneven one, reduce battery life.
⑼ the battery should be installed as far as possible in a clean, cool, ventilated, dry place, and to avoid sunlight, heaters or other heat sources of radiation effects. Batteries should be placed on positive legislation, non-tilt. Each battery should be firmly connected between the terminals.
⑽ regularly maintained. The battery in use after a certain time should be regularly inspected, such as observations of their appearance is abnormal, measurement of the battery voltage is the average and so on. If you are not a long-term power outage, the battery will always be in a state of charge, this would allow the activity of the battery deterioration. So, even if power outages, UPS is also needed on a regular basis to keep the battery discharge test in order to make active. Discharge test can generally be carried out for three months time, practice is UPS with a set – preferably 50% or more, and then disconnect the electricity, so that UPS is in battery discharge status, discharge duration, depending on battery capacity is usually in terms of a few ms to tens of ms, discharge to resume electricity supply, continue to charge the battery.
Conclusion
To understand and clearly affect the service life of lead-acid Inspiron 1521 battery,Inspiron 1525 battery in the course of the main factors and should pay attention to matters in our UPS system, the proper use and maintenance of lead-acid batteries are a great help. Hope that in their daily work, the proper use and maintenance of a good lead-acid batteries so that it can get a more rational use.