Equipment performance

• High-precision measuring elements: Use high-precision current sensors, voltage sensors, and power sensors to ensure the measurement accuracy of parameters such as battery output current, voltage, and power. For example, Hall effect current sensors with high resolution and good linearity can accurately measure small current changes.

• Stable load regulation capability: With accurate load regulation circuits and algorithms, the load size can be adjusted quickly and stably under different test conditions to simulate various load conditions in actual use. For example, a load regulation system controlled by a digital signal processor (DSP) can achieve fast and accurate load regulation.

• Good heat dissipation performance: During the test, the electronic load bank consumes a lot of electrical energy and generates heat. A good heat dissipation system can ensure that the equipment has stable performance during long-term testing and will not cause measurement errors or equipment failures due to overheating. For example, forced air cooling or liquid cooling is used to ensure that the internal temperature of the equipment is within a reasonable range.

Test process control

• Accurate test parameter setting: According to the specifications and test requirements of the tested battery, accurately set the charging voltage, current, discharge cut-off voltage, discharge current and other parameters. When conducting battery capacity testing, the appropriate discharge current should be set according to the rated capacity and test standard of the battery to ensure the accuracy of the test results.

• Real-time monitoring and feedback control: During the test, the voltage, current, temperature and other parameters of the battery are monitored in real time, and the load or charging parameters are adjusted in time according to the monitoring results. For example, when the battery temperature is too high, the load is automatically reduced or the test is stopped to prevent the battery from overheating and damage, and to avoid the impact of temperature changes on the test results.

• Reasonable test process design: Develop a scientific and reasonable test process, including pre-charging, constant current charging, constant voltage charging, discharging and other links, and test strictly according to the process. When conducting battery cycle life testing, multiple cycle tests should be carried out in accordance with the prescribed charging and discharging system to accurately evaluate the battery life performance.

• Equipment calibration and maintenance

• Regular calibration: Regularly calibrate the electronic load bank to ensure that the measurement accuracy and load adjustment accuracy meet the requirements. Calibration should be performed by a professional metrology organization or qualified technicians, using standard calibration sources and calibration methods.

• Daily maintenance: Perform daily maintenance of the equipment, including cleaning the surface of the equipment, checking internal connections, replacing aging parts, etc. Clean the dust and debris inside the equipment regularly to prevent poor heat dissipation or short circuit failures caused by dust accumulation; check whether the wire connection is loose to ensure reliable electrical connections.

• Software update: Update the control software and firmware of the equipment in a timely manner to fix possible vulnerabilities and defects and improve the performance and stability of the equipment. Equipment manufacturers usually release software updates regularly, and users should download and install them in a timely manner.

Environmental control

• Temperature control: Keep the temperature of the test environment within a stable range, generally 25℃±5℃. Air conditioning systems or thermostats can be used to control the ambient temperature to avoid temperature changes affecting battery performance and test results. When conducting low-temperature or high-temperature performance tests, they should be conducted in a special high-low temperature test chamber, and the temperature change rate and accuracy should be strictly controlled.

• Humidity control: Keep the relative humidity of the test environment within an appropriate range, generally 40%~60%. Too high humidity may cause equipment short circuit, corrosion and other problems, while too low humidity may generate static electricity, affecting the test results and equipment safety. Equipment such as dehumidifiers or humidifiers can be used to adjust the ambient humidity.

Data processing and analysis

• Data acquisition and recording: A high-speed, high-precision data acquisition system is used to collect and record battery parameters in real time during the test. The collected data should include voltage, current, time, temperature, etc., so that detailed analysis and processing can be carried out later.

• Data analysis and processing: Use professional data analysis software to analyze and process the collected data, remove abnormal data points, and calculate the battery's capacity, internal resistance, energy efficiency and other performance indicators. For example, a filtering algorithm is used to remove noise interference, and a statistical analysis method is used to evaluate the repeatability and reliability of the test results.

• Result verification and comparison: The test results are compared and verified with the test results of other authoritative test methods or equipment, such as the test results of the battery charge and discharge tester. At the same time, multiple repeated tests can be performed to ensure the consistency and accuracy of the test results.