The method of a domestic vehicle inspection and research institute to test the failure of the automobile power lithium battery pack is to install the lithium battery on the heating plate, and then conduct a charge and discharge experiment. Usually, 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 the lithium 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 needs high-density multiple sampling to predict the maximum failure temperature of the battery, which brings great trouble to the test.
The vehicle inspection institute tried to use the FLIRA655sc infrared thermal imaging camera to replace the traditional thermocouple, and carried out the failure test of the lithium battery pack, and the result was unexpected, so that the tester can quickly, intuitively and accurately determine the battery The highest point of temperature avoids the trouble of using thermocouples to detect multiple samples to estimate the highest failure temperature of the lithium battery pack.
Failure analysis and detection application of power lithium battery pack
Lithium-ion batteries will experience certain failures 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 battery pack to stop working or other safety issues.
Lithium battery failure refers to the degradation of battery performance or abnormal use performance caused by some specific essential reasons. The failures of lithium batteries are mainly divided into two categories: one is performance failure, and the other is safety failure.
