18650 1800mah battery maintenance status and solutions?

　　The necessity of 18650 1800mah battery maintenance

　　In an uninterruptible power supply (UpS) system, it can be said that the battery is the backbone of the system. An UpS without a battery can only be called a constant voltage and constant frequency (CVCF) power supply. The reason why UpS can achieve uninterrupted power supply is because of the battery. When the mains power is abnormal, the inverter directly converts the chemical energy of the battery into AC power and transmits it, so that the electrical equipment can continue to operate.

　　At present, maintenance-free sealed lead-acid batteries widely used in small and medium-sized UpS power supplies account for 1/4-1/2 of the total cost of UpS power supplies. Not only that, actual maintenance also shows that more than 50% of UpS power supplies fail. Related to 18650 1800mah battery. The failure of 18650 1800mah battery is mainly manifested by insufficient terminal voltage, insufficient capacity or instantaneous discharge current that does not meet the load starting requirements.

　　Generally, the battery life of UpS in normal use is about 5 years. However, currently, a considerable number of domestic UpS batteries begin to have problems less than one year after being put into use. What's more, some imported brands of domestic batteries have defects in the manufacturing process. Congenital defects, on the other hand, are caused by lack of necessary maintenance. It is worth noting that many users do not know the health status of their own system's 18650 1800mah battery due to the lack of necessary testing and maintenance methods, leaving hidden dangers for the normal operation of the UpS system.

　　Is it true that a battery that has been used for five years cannot be used? Is a battery that has been used for half a year still usable? Are the batteries provided by UpS suppliers necessarily good? ---Necessary detection tools.

　　"A mouse spoils a pot of soup." Among more than a dozen batteries connected in series, if only one is damaged prematurely, if it is not discovered in time, the other batteries will be scrapped as time goes by. --Early detection.

　　When a large number of UPSs fail, the first thing to be thrown away is the expensive batteries. The reason is that the battery voltage first decreases due to various reasons, and the maintainer has no corresponding detection means. Thousands of dollars were spent to establish the backup power system. Due to the uncertainty of the battery status, the system was paralyzed and important data was lost. The consequences were unimaginable. The losses were so huge that they could not be compensated for with tens of thousands of dollars.

　　Know the status early!

　　Traditional 18650 1800mah battery testing and maintenance methods

　　Generally, the requirements for the battery of the UpS power supply: meet a certain terminal voltage; the battery should have the characteristics of being able to output a large current at the moment of starting discharge; meet a certain capacity to ensure the time of inverter power supply.

　　1. Use a multimeter to measure the terminal voltage of the battery.

　　Practice has proven that it is impossible to determine whether the old battery has expired by measuring the floating charge terminal voltage of the 18650 1800mah battery with a multimeter. Therefore, it is generally necessary to measure the terminal voltage of the battery offline or online. The terminal voltage of the battery under test is about 12V (for a 12V battery), and the minimum cannot be lower than 10.5V. Batteries with less than 10.5V are undervoltage or have expired. If the battery's terminal voltage still does not reach 12V after charging or activating charging, it is a failed battery.

　　2. Test whether the 18650 1800mah battery has the characteristics of outputting large current at startup instant

　　The switching time of the backup UpS power supply from mains power supply to inverter power supply is required to be less than 7ms, and is generally designed to be about 4-5ms. This means that once the mains power supply is interrupted, the 18650 1800mah battery must output the current required by the load in less than 4-5ms. Some failed batteries can meet the terminal voltage and capacity requirements, but cannot discharge the current to meet the large current requirements in less than 4-5ms, and they are also unqualified batteries. The 18650 1800mah battery's characteristics of instantaneous output of large current can only be tested when the mains power is turned off. There are certain risks without knowing the battery performance, so it is generally not carried out.

　　3. Determine the capacity of 18650 1800mah battery

　　The traditional method of judging the capacity of UpS batteries is the same as the method of judging ordinary batteries. The entire battery pack is separated from the communication power supply system and a resistor wire is installed. It discharges at a constant current at a rate of eight or ten hours, and then discharges the battery at a certain rate that reaches the discharge end voltage first. The discharge time and current of a single battery are used to calculate its capacity.

　　Traditional capacity testing has the following disadvantages:

　　⑴The battery pack needs to be separated from the system, which increases the risk of system crash;

　　⑵ The discharge time is long and requires manual testing and recording, which requires a large workload. In addition, UpS batteries are generally installed in box-type cabinets, and the testing work is not very easy;

　　⑶The resistance wire is bulky and red-hot, unsafe and requires high work intensity.

　　Domestic 18650 1800mah battery maintenance status

　　The maintenance of UpS batteries is similar to the maintenance of batteries in general low-voltage systems. When a new battery is introduced, project acceptance is required, and the internal resistance and voltage of the battery are tested simultaneously to ensure the consistency of its internal resistance; when the new battery is put into use, it is required to maintain Suitable battery working environment temperature requires regular measurement of the terminal voltage and internal resistance of each battery. When the internal resistance or voltage difference of each battery is too large, equal charging must be performed, and the battery must be deeply discharged regularly to check the performance of the battery pack. deterioration and maintain battery activity.

　　However, in actual use, due to various conditions, few people perform the maintenance of UpS batteries exactly as described above. First, the acceptance of new batteries takes a long time and there are no convenient tools to use. Quite a few people do not have it at all. To do this work, the battery is put into use. According to statistics, more than 95% of the UpS batteries in mainland China lack necessary maintenance, which lays hidden dangers for future UpS power supply failures. Secondly, after the new battery is put into use, due to the general 18650 1800mah battery It is installed in a cabinet, making it inconvenient to measure and detach, and the internal resistance and terminal voltage are rarely measured. According to the current conditions (more than 98% of UpS batteries are not equipped with monitoring equipment), the majority of maintenance personnel can only perform maintenance at intervals. Time, turn off the mains power and let the 18650 1800mah battery discharge the actual system for a period of time. At best, it only activates the battery pack to maintain the activity of the battery. However, important data such as the performance of the battery and the remaining capacity of each battery are still unknown.

　　UpS comprehensive solution for battery maintenance

　　Introduction to intelligent battery status testing and analysis system

　　How to establish an effective maintenance and management method for valve-regulated lead-acid batteries has always been a concern of the majority of maintenance personnel. Recently, Shenzhen Pluco Intelligent Testing Equipment Co., Ltd. has launched a comprehensive battery maintenance solution, which solves the problem of the current lack of necessary maintenance methods and tools for UpS batteries. It can not only test the battery performance for you and find backward cells, but also perform battery maintenance. Early prediction can effectively prevent the occurrence of faults, and the effect is good. It is recommended here to the majority of users to help establish an effective battery maintenance method.

　　18650 1800mah battery maintenance status and solutions

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