On the safety realization of power lithium-ion battery, from the point of view of battery company, what should be improved to really prevent this gray rhinoceros, as a scholar who has been in business for many years, the following suggestions are put forward:

  First, in the choice of materials, the choice of core materials will have a direct impact on the final battery product safety.

  The safety of the battery depends largely on the core material, especially for the high nickel ternary system, the content of metal impurities, residual lithium and PH value of the cathode material will have a great influence on the safety performance of the battery.

  Second, safety redundancy and monitoring and early warning should be done in the design of batteries, modules, Pack and process setting.

  In the design process, the first thing is to ensure the chemical stability of the battery, to choose stable materials, and to test its stability through strict evaluation; In the module part, the battery cell is protected from impact through the structure.

  The third stage is pack. In addition to physical protection measures, the key is to diagnose the fault of the battery module through BMS, monitor the abnormal occurrence, and predict the possible problems, so as to control the problems.

  In the test and verification before mass production, we should do a good job of full verification.

  In fact, this is also the biggest problem facing the domestic power lithium-ion battery field at present. On the one hand, the product replacement is rapid, on the other hand, the testing and verification is time-consuming and labor-consuming, and the design reference related experience is lacking, which is also an important reason for frequent accidents in recent years.