What are the testing and maintenance methods for traditional UpS batteries?

Traditional UpS battery testing and maintenance methods generally require the UpS power supply for the battery: meet a certain terminal voltage; the battery should have the characteristics of being able to output a large current at the moment of starting and discharging; and 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 proved that measuring the floating charge terminal voltage of the UpS battery with a multimeter cannot determine whether the old battery has failed. Because the battery is in the mains, the mains uses the rectifier module to float the battery, and the terminal voltage of the battery under test is higher than 12V (for a 12V battery), so it is generally necessary to disconnect the mains and use the battery to invert. Measure the terminal voltage of the battery, and the minimum should not be lower than 10.5V. A battery with less than 10.5V is an undervoltage or a failed battery. If this kind of battery still does not reach 12V after charging or activation charging, it is a failed battery. 2. Test whether the UpS battery has the characteristics of outputting large current at the moment of starting. The switching time of the UpS power supply in the communication industry from the mains power supply to the battery inverter power supply is required to be less than 4ms. That is to say, once the mains power supply is interrupted, the UpS battery must be in The current required to output the load within 4ms. Some failed batteries can meet the requirements of terminal voltage and capacity, but cannot reach the requirements of large current discharge in less than 4ms. They are also unqualified batteries. The instantaneous high current output characteristics of the UpS battery can only be tested when the mains power is turned off. There is a certain risk if the battery performance is not known, and it is generally not performed. The UpS battery cannot output a large current in an instant, which is generally caused by the battery's long-term non-discharge. The UpS battery that is frequently discharged or regularly discharged basically does not have this problem. Regarding the requirement that the switching time of the UpS power supply from the mains power supply to the battery inverter power supply is less than 4ms, when our company tested a 600KW diesel generator set in a branch of Shanghai Unicom, their load was 420KW, and the load capacity of the diesel generator set was also just right. It is 420KW. In order to enable the diesel generator set to supply power to the equipment smoothly after starting, they adjusted the diesel generator set control part to 7ms. When the mains power is off, when the diesel generator set is supplying power, the UpS is in the process of charging and discharging. Let the battery discharge, without causing communication interruption, they can only turn off some loads. 3. Judging the capacity of UpS battery. The traditional method of judging the capacity of UpS battery is the same as that of general battery. The whole battery pack is separated from the communication power system and connected to the resistance wire, and discharged at a constant current rate of one hour, three hours or ten hours. , And then calculate its capacity based on the discharge time and current of a single battery that first reaches the end-of-discharge voltage. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the factors affecting battery self-discharge?