How to use a 10-hour rate discharge test to test the maintenance-free battery capacity

Tags: How to use 10-hour rate discharge test maintenance-free battery capacity In daily work to test the maintenance-free battery capacity, online testing is mostly used, because the back-end load is stable, discharge at a constant current, according to the size of the discharge current, it is divided into 10 Hourly rate discharge test, 3-hour rate discharge test, etc. Here we introduce how to test the maintenance-free battery capacity with a 10-hour rate discharge test.　　 First, let the fully charged maintenance-free battery stand for 1h~24h, and the test environment is at 25℃±5℃. Before discharging, measure and record the voltage and internal resistance of the battery in a maintenance-free battery floating state. Interpretation to all operators, including technical and safety clarifications. The terminal voltage of the maintenance-free battery should be measured before and after the discharge, and the current should be measured during the discharge. The current fluctuation should not exceed 1% of the specified value. Note that the terminal voltage and room temperature of the maintenance-free battery should be measured during the discharge. The measurement interval for the 10h rate test is 1h, the measurement interval for the 3h rate test is 1h, and the measurement interval for the 1h rate test is 10min. The end of the discharge should be measured at any time , To ensure accurate determination of the termination voltage time.　　 If the temperature is not 25°C, it needs to be converted into a capacity of 25°C according to formula (1). Ceu003dCt/[1+K(t-25℃)]……………………………………………………(1) 　　 where: 　　 t——ambient temperature during discharge K——temperature coefficient: In the 10h rate capacity test, Ku003d0.006/℃　　 In the 3h rate capacity test, Ku003d0.008/℃　　 In the 1h rate capacity test, Ku003d0.01/℃　　. The backup ensures the safe power supply of the load.　 Measure and record the voltage in the discharge process in time, and hang warning signs in the operation area.