The high-low temperature resistance test is required for automotive power batteries because during use, the battery will face different temperature changes and environmental conditions, such as high temperature, low temperature, humidity, etc. These conditions may adversely affect the electrochemical performance, lifespan, and safety of the battery, leading to issues such as reduced capacity, increased internal resistance, and short circuits. Therefore, through the high-low temperature resistance test, the reliability and stability of the power battery in different environments can be verified to ensure that it can work normally and have stable performance and quality under various extreme conditions, thereby ensuring the safety of the automotive power battery and reliability to meet the needs and requirements of automobile driving.
experiment method
The high-low Temperature Test Chamber can be used for high-low temperature resistance tests of automotive power batteries. The following are the general test steps:
According to relevant standards or product requirements, determine the high-low temperature range of the test, holding time, temperature change rate and other parameters.
According to product requirements or standard regulations, prepare samples to be tested, including battery cells, battery packs, etc.
Install the sample to be tested in the test box, pay attention to the placement of the sample and the contact position of the temperature probe.
According to the test conditions and sample requirements, adjust the temperature control system of the Test Chamber to ensure that the Test Chamber can reach the required temperature and temperature fluctuation range.
Heating or cooling the test box to the set temperature, keeping it for a certain period of time, then changing the temperature, and then keeping it for a certain period of time, repeating it many times until the test is completed.
During the test, it is necessary to monitor the battery voltage, internal resistance, capacity and other parameters of the sample, and at the same time pay attention to the temperature change and temperature control accuracy of the Test Chamber.
After the test is completed, the sample is taken out and tested, and it is judged whether the sample meets the requirements according to the test result. At the same time, it is also necessary to clean and maintain the Test Chamber to ensure the accuracy and reliability of the next test.
In short, the high-low Temperature Test Chamber can simulate the working state of automotive power batteries in high temperature and low temperature environments, and evaluate their performance and reliability.
