UPS battery capacity detection method and battery test items

　　Author ：Iflowpower – Portable Power Station Supplier

What is the UPS battery capacity detection method and a battery test item? UPS use capacity generally refers to the capacity of the rear end, and the battery capacity is divided into theoretical capacity, rated capacity and actual capacity according to different conditions. By performing internal resistance testing in the cells in the lithium ion battery pack, it is possible to accurately grasp the performance state of each battery in the battery, and it is also important to ensure stability of the battery. How do I test UPS battery capacity? The battery is an important part of the UPS system, and its advantages and disadvantages are directly related to the reliability of the entire UPS system.

Regardless of how advanced UPS design, how complete features, once the battery is invalid, and better UPS cannot supply uninterrupted power supply. So, don't choose inferior lead-acid batteries because of the cheap map, which will affect the reliability of the entire UPS system and will cause greater losses. 1.

2, the capacity test method UPS system main battery is mostly lead-acid-free maintenance battery, the monomer battery voltage is 12V, in order to master the substantially capacity of the battery pack, it is necessary to conduct a verification discharge test. ● Offline measurement method: 1. Align the battery pack to stand after 1 hour, use an external (intelligent) fake load in the case of 25 ± 5 ° C, using a 10-hour discharge rate for discharge testing Intelligent battery discharge instrument; 2.

Before discharge start, measure the end voltage, ambient temperature, time; 3. Measure the end voltage, discharge current, indoor temperature, and measurement time intervals of 1 hour, discharge current fluctuations during discharge Do not exceed 1% of the specified values; 4. Discharge current multiplies the capacity of the battery pack by the discharge time.

When the battery is discharged at 10 hours, if the temperature is not 25 ° C, the actual measured capacity should be converted into a capacity Ce at 25 ° C in the following formula. ● Check the discharge method: 1. The nuclear discharge method is 100% Cere-discharge, which has the advantage of accurate capacity testing, and therefore, it is still the most reliable method of detecting the performance of the UPS battery performance in the world.

The calibration of the discharge method, that is, full discharge, is the most direct and reliable method for detecting the battery capacity. Whether it is online or offline, it is necessary to set up a backup power supply as a prevention measures to ensure the security of the system. However, the current accuracy of the discharge, the voltage accuracy, and the timing accuracy are.

2. Commonly used battery capacity test method is to discharge the battery to a load, follow the constant discharge rate, stop the discharge, calculate the product of the discharge, the discharge time, and the capacity of the battery can be obtained. It is to discharge through the discharge instrument.

What is the battery test item? The current battery test is important for the battery core, battery module and battery packs, from its three perspectives using safety, environmental adaptability and electrical performance, important test items include battery recharge / discharge performance testing, battery cycle life Test, battery capacity test, etc. ◆ Battery charge and discharge battery test: Battery charge and discharge mode includes constant current charging (CC), constant voltage charging (CV), constant current discharge (CC), constant blocker discharge (CR), mixed charge and discharge, and step type The mode charge and discharge, the charging process is divided into precharge, fast charging, complement charging, trickle charging, and the discharge process generally does not continue large current discharge, generally using pulse discharge current, battery charge and discharge battery test It is a monitoring of voltage, current, resistance and temperature in various charging / discharge mode states. ◆ Battery cycle life test is also called "number of battery charging cycles", the life of the battery is continuously attenuated with the number of times of charging, the total number of battery charging is 2000-3000 times, and the test of cycle life is deep and deep Put the way, the battery cycle life test conditions and requirements: under the conditions of 20 ° C ± 5 ° C in the ambient temperature, when the battery end voltage reaches the charging limit voltage 4.

2V, change to constant voltage charging, Until the charging current is less than or equal to 1 / 20C, stop charging, put on the stop of 0.5h ~ 1 h, then discharged to the termination voltage of 2.75V, after the discharge is completed, then the next charge and discharge cycle is performed until continuous The two discharge time is less than 36 min, and it is considered that the life is terminated, and the number of cycles must be greater than 300 times.

◆ Battery capacity test: The size of the battery capacity is measured by the battery that can continue at a predetermined discharge rate, usually in amperage / hour. The capacity of the battery can be tested in different discharge magnices. The battery capacity test generally discharges with a small magnification (e.

g., 0.2c), and should be careful not to depth discharge to prevent damage to the battery, at the same test dimension Keep the consistency of its test parameters, that is, observe the battery working time when the discharge magnification is constant.

Understand and clearly affect the important factors of battery life and what you should pay attention to during use, there is a great help of our proper use and maintenance of the battery in the UPS system. I hope everyone uses the battery to properly use and maintain the battery to make it more reasonable.