How to detect the failure of power lithium-ion battery packs and failure analysis detection applications

How to detect the failure of power lithium-ion battery pack? The method of a domestic vehicle inspection institute to test the failure of automobile power lithium-ion battery packs is to install the lithium-ion battery on the heating plate, and then conduct a charge and discharge experiment. Generally, the battery will fail when heated to more than 100 degrees. Some batteries spray gas and liquid outward; some catch fire and burn; some even explode. Therefore, in the test process, fast and intuitive detection of the maximum temperature of the battery is the most important thing. So how can we quickly and intuitively detect the maximum temperature of a lithium-ion battery pack? This has become a big problem for the vehicle inspection institute. The current testing method of the institute is to use a thermocouple to detect the temperature of the battery, but there is only one sampling point, so the temperature value detected by the thermocouple is not necessarily the highest value of the battery. , It takes high-density multiple sampling to predict the maximum failure temperature of the battery, which brings great trouble to the test. The Vehicle Inspection and Research Institute tried to use the FLIRA655sc infrared thermal imaging camera to replace the traditional thermocouple, and carried out the failure test of the lithium-ion battery pack. The result was unexpected, so that the tester can quickly, intuitively and accurately determine The highest point of the battery temperature prevents the trouble of using thermocouples to detect multiple samples to estimate the maximum failure temperature of the lithium-ion battery pack. A655sc has a built-in uncooled detector and a focal plane array window for 200Hz high-speed imaging. It can be easily integrated with GenICam and GigE vision protocols, reads and displays temperature values u200bu200bin real time, and automatically tracks and captures the highest temperature in the analysis area Point, so that the staff can quickly, intuitively and accurately find the highest failure temperature of the lithium-ion battery through the infrared thermal image. Compared to traditional thermocouples, using FLIRA655sc infrared thermal imaging camera to test the failure performance of automotive lithium-ion battery packs is undoubtedly a correct choice. Power lithium-ion battery pack failure analysis and detection applications Li-ion batteries will have certain failure phenomena during production, transportation, and use, and the failure of a single battery will affect the performance and reliability of the entire battery pack, and even cause the lithium-ion battery pack Stop work or other safety issues. The failure of a lithium-ion battery refers to the degradation of battery performance or abnormal use performance caused by some specific essential reasons. The failures of lithium-ion batteries are mainly divided into two categories: one is performance failure, and the other is safety failure. Performance failure means that the performance of the lithium-ion battery does not meet the requirements for use and related indicators, including capacity degradation or diving, short cycle life, poor rate performance, poor consistency, easy self-discharge, high and low temperature performance degradation, etc.; safety failure Refers to the failure of lithium-ion battery packs due to improper use or abuse, which has a certain safety risk, including thermal runaway, flatulence, liquid leakage, lithium evolution, short circuit, expansion deformation, etc. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What types of air batteries are there?