Need for ups battery maintenance
In an uninterruptible power supply (ups) system, it can be said that switch-off module batteries are the backbone of the system, and ups without batteries can only be referred to as the pressure stabilization frequency (cvcf) power source. Ups was thus able to achieve uninterrupted power supply because of the mtd2002 batteries, which, in the event of anomalous municipal electricity, were transported directly by the reverse agents to communicate the chemical capacity of the batteries and were operated continuously using the electrical equipment。
At present, the extensive use of unsealed lead-acid batteries in small and medium-sized ups power sources, which account for as much as one quarter-1/2 of the total cost of ups power, also indicates that more than 50 per cent of ups power failures are associated with ups batteries. The failure of ups batteries was mainly demonstrated by insufficient end voltage, insufficient capacity or an instant discharge of mtd2002 currents that did not meet the loading start-up requirements。
While normally used ups have a battery life of about five years, there is currently a significant proportion of the ups batteries in the country that have been in service for less than one year, and even worse, some imported branded domestic batteries have congenital defects in the manufacturing process and are due to a lack of necessary maintenance in the day after tomorrow. It is worth noting that many user units are not aware of the health status of their own system ups batteries due to lack of the necessary testing and maintenance tools, leaving the ups system in danger。
Batteries that have been used for five years must not be used? Is a six-month battery necessarily working? Are the batteries supplied by ups suppliers necessarily good? - - the necessary testing tools。
"a rat, a bad soup" and a dozen serial power switch module batteries, if one section is damaged prematurely or if not found in time, for a long period of time, other batteries are scrapped. - early detection。
In the event of a large number of ups malfunctions, expensive batteries were the first to be thrown away because the battery voltage was first reduced for a variety of reasons and the maintainer did not have the means to detect them. The consequences of the thousands of power backup systems that have been put in place, resulting in the breakdown of the system and the loss of vital data due to the uncertainty of the condition of the batteries, are unimaginable and the losses are far from possible to compensate for with tens of thousands of dollars。
I knew it!
Traditional ups test battery maintenance
General ups power requirements for batteries: meet a certain mtd2002 end voltage; the battery should have the characteristics that allow for the output of large currents at the moment of start-up discharge; meet a certain capacity to guarantee the time of reverse power generation。
1. Measurement of the end voltage of batteries using a single meter
It has been proven that the floating voltage of ups batteries can not be judged to have failed. Therefore, the end voltage of the cell is generally measured offline or online, with the end voltage of the measured battery being around 12v (for 12v batteries) at a minimum of 10. 5v. Batteries less than 10. 5 v are cells that are either under pressure or have failed. If the battery is charged or activated at a back-end voltage of less than 12 v, the battery is disabled。
2. Test whether ups batteries are capable of initiating instant output of large currents
The switch time for backup ups power supply from municipal to reverse power supply is less than 7 ms, generally designed to be around 4-5 ms. This means that, in the event of an interruption in the supply of the municipal electricity mtd2002, ups batteries must export the required current for loads less than 4-5 ms. Some non-functional batteries meet the requirements for end voltage and capacity, but cannot discharge the currents in less than 4-5 ms to meet the requirements for large currents and are also unqualified batteries. The properties of ups batteries for the instantaneous output of large currents can only be tested if they are off-market and have a certain risk of not knowing battery performance, which is generally not performed。
3. Determination of the capacity of ups batteries
The traditional method of determining the capacity of ups accumulators is the same as the method of determining the battery in the general switch on the power supply module, which is calculated by extrapolating the discharge time and current of a single-body battery that terminates the voltage by removing the whole battery from the communication power system and placing it on a resistance wire, with a constant discharge rate of eight or ten hours。
Traditional capacity tests have the following disadvantages:
(1) batteries need to be removed from the system to increase the system death risk;
(2) long power discharge time and manual testing of records and heavy workload, in addition to the fact that ups batteries are generally packed in box cabinets and testing is not easy;
(3) the electrical resistance is thick and red-hot, unsafe and intense。
Maintenance status of domestic ups batteries
The maintenance of ups batteries is similar to that of general low-pressure system batteries. When new batteries are introduced, engineering acceptance is required to test both the internal resistance and the voltage of the switch module batteries to ensure their internal resistance consistency; when new batteries are used, the working temperature of the battery is required to maintain the appropriate working environment, and periodic measurements of the battery end voltage and internal resistance are required, both in equal charge and in depth discharge of the battery in order to check the poor performance of the battery and maintain its activity。
In practice, however, the maintenance of ups batteries is rarely carried out in full compliance with the above-mentioned conditions, first, with new batteries inspected, and, owing to the length of time and inconvenient tools available, a considerable number of people were not doing the work to put batteries in service at all. According to the statistics, more than 95 per cent of ups batteries in mainland china lacked the necessary maintenance, which was a hazard to subsequent ups power failures; secondly, when new batteries were put into use, since the general ups batteries were installed in cabinets, were not easy to measure, disengage and rarely measured internal resistance and end voltage; under the prevailing conditions (more than 98 per cent of ups batteries are not equipped with surveillance equipment), the vast majority of maintenance personnel are able to perform only at regular intervals, when the closing of the market power allows the ups battery to discharge to the actual system for a period of time, at best allowing the battery to re-activate in order to maintain the battery's activity, while important data such as the poor performance of the battery and the remaining capacity of the various savings cells are not known。
Comprehensive solution for ups battery maintenance
Introduction to the smart battery status test analysis system
The development of an effective switch-to-power module maintenance management approach for valve-controlled lead-acid batteries has been an issue of concern for a wide range of mtd2002 maintenance staff. Recently, shenzhen plucco smart testing equipment ltd. Introduced a comprehensive solution to the problem of the current lack of necessary maintenance tools and tools for ups batteries, not only to test battery performance and find backward monomers, but also to make early predictions of switch-off power module batteries, effectively preventing malfunctions, which are recommended to a wide range of users to help establish an effective mtd2002 battery maintenance method
