What factors should be considered when studying the safety of power lithium-ion batteries?

In fact, when we are studying the safety of power lithium-ion batteries, we consider the following levels: First, it can be used normally under actual different temperatures, moderate conditions, and various harsh environments. The safety of it means that it can be used for safety evaluation. Second, it cannot be avoided. As mentioned by various experts, the safety of batteries may have potential safety hazards. Once a hidden hazard occurs, the safety evaluation can be controlled. Third, once an accident occurs, it is out of control evaluation. Time relationship. Today we are only part of the previous available and controllable evaluation. As you all know, in addition to testing, I will devote a large part of my energy to the formulation of domestic national standards and international regulations. The prerequisite for us to formulate domestic standards and international regulations is to study the possible existence of electric vehicles during the actual use of electric vehicles, such failures or some out-of-control states that may be encountered, and this state may bring about What is the result of this. This is my team’s analysis from September of 2011 to 2018. There are about 80 accidents involving passenger cars in all electric vehicle accidents. In the accidents, we analyzed the specific causes of the accident. Of course, this reason is all. Yes, because there are some that we can know the exact cause, I myself have participated in the detailed investigation process of several accidents, and most of the accident causes are actually more from the analysis in the media that we can search. I made a statistic and you can see that 16% of it is related to the charging process. Mr. Ai just analyzed that during the use of electric vehicles, he analyzed overcharging. In fact, there were some accidents. At the end of charging or in the process of charging, some of them are in the overcharged state. This is clear to everyone. At the end of charging or even during overcharging, it is relatively more active. Security issues are prone to occur. The second type, collision, is the influence of some mechanical external force factors, which account for about 18%, and the third type, water ingress, which accounts for about 3%. In addition, there is a relatively large proportion of 35%. We have conducted a careful analysis and believe that some accidents of Iris are caused by the internal short circuit of the battery. This kind of time and space is the problem mentioned by many experts just now. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it. Previous: Why doesn't the electric vehicle battery run far?