In terms of the safety realization of power lithium-ion batteries, from the perspective of battery companies, what specific improvements should be made to truly prevent them. Through in-depth exchanges with industry experts and upstream and downstream companies in the industrial chain, the following suggestions are put forward:
First, in terms of material selection, the selection of core materials will directly affect the safety of the final battery product.
The person in charge of the technology analyzed that the safety of the battery cell depends largely on the core material, especially for the high-nickel ternary system, the metal foreign matter content, residual lithium and pH value of the positive electrode material will affect the safety performance of the battery cell Very big.
The second is to do a good job in safety redundancy and monitoring and early warning in terms of battery cell, module, Pack design and process setting.
In the design process, the first thing is to ensure the chemical stability of the battery cell, select a stable material, and test its stability through strict evaluation; in the module part, the structure is used to protect the battery cell from impact. The third stage is pack. In addition to physical protection measures, the key is to diagnose the faults of the battery modules through the BMS, monitor the occurrence of abnormalities, and predict possible problems, so as to control the problems.
The third is to do a good job in the testing and verification before mass production.
In fact, this is currently the biggest problem facing the field of domestic power lithium-ion batteries. On the one hand, product replacement is rapid; important reason for hair loss.
