UPS power battery maintenance testing and solutions. As we all know, the battery is an important part of the UPS power system and the backbone of the entire UPS system. It is worth noting that many users lack the necessary testing and maintenance methods and do not understand the battery health of the entire UPS power system, leaving many hidden dangers for the normal operation of the UPS system. Today I will teach you how to detect UPS power batteries and their solutions.

　　The necessity of UPS battery maintenance

　　In a UPS system, it can be said that the battery is the backbone of the system. A UPS without a battery can only be called a voltage-stabilized and frequency-stabilized 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.

　　Generally, the battery life of a UPS in normal use is about 5 years. However, currently, a considerable number of UPS batteries in China 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 UPS power battery due to the lack of necessary testing and maintenance methods, leaving hidden dangers for the normal operation of the UPS system.

　　Appearance inspection of UPS power battery

　　◆Whether there is mechanical damage or whether there are small animal carcasses in the equipment;

　　◆Whether there is conductive dirt or dust inside the equipment;

　　◆Whether accumulated dust affects heat dissipation.

　　UPS power battery maintenance and inspection

　　General UPS power supply requirements for batteries: 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 proved that using a multimeter to measure the floating charge terminal voltage of the UPS power battery cannot determine whether the old battery has expired. 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 UPS power battery has the characteristics of outputting large current at startup.

　　The UPS power supply switching time 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 UPS power 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 UPS 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 UPS power battery

　　The traditional method of judging UPS power supply battery capacity is the same as the method of judging ordinary batteries. The entire set of batteries is separated from the communication power supply system and a resistance wire is installed. The battery is discharged at a constant current at a rate of eight or ten hours, and then the battery is discharged 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.

　　UPS power battery solution

　　1. It is strictly prohibited to over-current charge the battery of UPS power supply.

　　2. It is strictly prohibited to over-voltage charge the battery of UPS power supply.

　　3. It is strictly prohibited to over-discharge the battery of UPS power supply.

　　4. For a UPS power supply that has been idle for a long time, in order to ensure that the battery has good charging and discharging characteristics, it is best not to add a load before restarting the machine and let the UPS power supply use the charging circuit in the machine to float charge the battery for 10 to 15 hours. Use later

　　5. Under normal circumstances, the battery should be charged and discharged every 3 to 6 months. After discharge, the continuous charging time of the standard machine should be no less than 10 hours.

　　6. The battery usage environment requires a temperature between 0℃ and 40℃. Avoid direct sunlight and keep it clean.

　　7. For most UPS power supplies, when the battery is discharged each time, the internal charging circuit can be used for float charging.

　　8. Maintain appropriate ambient temperature

　　In UPS power supplies, maintenance-free sealed lead-acid batteries are widely used. Battery failure causes the power supply to fail to work properly. Correct maintenance of the battery pack is the key to extending the service life of the UPS power supply battery. .

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