Why has the development of ternary polymer lithium batteries been hindered?

Ternary polymer lithium battery refers to a lithium battery that uses lithium nickel cobalt manganate (Li (NiCoMn) O2) as the cathode material. The precursor product of the ternary composite cathode material is nickel salt, cobalt salt, and manganese salt. As raw materials, the ratio of nickel, cobalt and manganese inside can be adjusted according to actual needs. Ternary lithium batteries have greater energy density, but their safety is often questioned. The reason for this is that even these two materials will be analyzed when they reach a certain temperature, the ternary lithium material will be analyzed at a lower 200 degrees, and the lithium iron phosphate material will be analyzed at about 800 degrees. In addition, the chemical reaction of the ternary lithium material is more intense, it will release oxygen molecules, and the electrolyte will burn rapidly under high temperature applications, and a chain reaction will occur. To put it simply, ternary lithium materials are more likely to catch fire than lithium iron phosphate materials. But it should be noted that we are talking about materials, not batteries that have become finished products. Because ternary lithium materials have such potential safety hazards, manufacturers are also working hard to prevent accidents. According to the easy pyrolysis characteristics of ternary lithium materials, manufacturers will do a lot of overcharge protection (OVP), over discharge protection (UVP), over temperature protection (OTP), and over current protection (OCP). effort. Therefore, the spontaneous combustion incident should consider whether the manufacturer's functions in these links are in place, rather than simply giving up food due to choking. So what is the current usage of these two batteries? Let's focus on a set of data. In November last year, the installed capacity of electric buses with lithium iron phosphate batteries accounted for 64.9%, and the installed capacity of ternary lithium batteries was only 27.6%. On the contrary, in the pure electric passenger car market, the installed capacity of ternary lithium batteries in November last year exceeded 76%. It can be seen that the advantages of the greater energy density of the ternary lithium battery itself should be born as a new energy storage device for automobiles in the future. The current occurrence of related safety incidents can be regarded as a good thing when the popularization of new energy vehicles is still in its infancy. In order to achieve the dual goals of seizing the market and obtaining policy support, many new energy vehicle-related companies have relaxed their technical requirements and processed a large number of energy components that cannot withstand repeated use for a long time. The working environment of automobiles is harsh, and the reasons for safety accidents will inevitably increase greatly when these parts are used for a long time. Therefore, we can think that Zhang Xiangmu, director of the Equipment Department of the Ministry of Industry and Information Technology, announced at the my country Electric Vehicle Hundreds Conference that the safety performance of ternary lithium battery buses is to be evaluated. To promote the emergence of industry standards. Whether it is about consumers or manufacturers, it will have a very positive significance in the future. Therefore, there is no need to hesitate just because of the one-sided information about safety accidents of ternary lithium batteries on the Internet. The materials are dangerous. The key lies in how to control them firmly. Lithium iron phosphate battery and Sanyuanli battery: Different types of batteries for new energy vehicles have finished talking about the battery situation. I think that regarding the situation of new energy vehicles, I also need to briefly analyze the use of batteries in vehicles. After all, consumers who buy pure electric vehicles are still a minority, and more people are concerned about hybrid vehicles. Hybrid vehicles can be strictly classified into three types: general hybrid vehicles, plug-in hybrid vehicles and extended-range hybrid vehicles. The arrangement of the battery capacity in the above three types of cars from small to large happens to be a general hybrid vehicleu003cplug-in hybrid vehicleu0026le; extended-range hybrid vehicle. The battery of a general hybrid vehicle is not rechargeable, and the battery is used for starting and rapid acceleration; the battery of a plug-in hybrid vehicle has an increased capacity and rechargeable on the basis of a general hybrid vehicle battery, and has better acceleration capabilities and fuel economy Capacity; while the engine of the extended-range hybrid vehicle is used to drive the motor to generate electricity, and it is more inclined to pure electric vehicles. These three hybrid vehicle models have their own advantages and disadvantages. At this stage, the main force is also general hybrid and plug-in hybrid. It is precisely because the characteristics of the three hybrid electric vehicles have in common with regard to battery life and working environment, no matter what mode of hybrid electric vehicle is purchased, consumers must pay attention to relevant parameters, such as battery material and operating environment. And the best working condition, etc. At the same time, manufacturers should strictly control battery quality and related safety settings during the design process to ensure safe and efficient use. 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: What are the ways to improve the energy density of lithium batteries