How to increase the energy density of the battery?

From the current point of view, the methods to increase the energy density of power lithium-ion batteries are relatively limited. In addition to the development of new batteries, there are two methods to increase the weight of positive active materials and reduce the weight of battery pack accessories. For the former method, it is possible to directly add battery energy, but it also brings more problems, such as a decrease in safety and local overheating. Although the effect of the latter method is not so intuitive, it can also achieve the purpose of the first method. Reduce the weight of the accessories but not reduce the strength of the accessories. Judging from the current battery research and development situation, my country's research and application in this area are relatively lagging. In the research of materials science, we must admit that there is still a certain gap with foreign countries, especially in basic research and development. In addition, replacing the original heavier materials with lighter materials generally faces the problem of rising costs. In the case that power lithium-ion batteries are already very expensive, it is unlikely that OEMs will adopt this method. However, from the results of foreign research, it is possible to find a material with high strength, light weight and low cost. Some time ago, Volvo Cars announced that the lightweight of electric vehicle batteries has entered the stage of practical testing. Volvo said that the new battery materials are cheaper and more environmentally friendly. If all the current electric vehicle batteries are replaced with this new material, the weight of the vehicle can be reduced by more than 15%, and the effect is obvious. The rearrangement of batteries is also one of the effective means to improve the energy density of the system. For example, through the research and design of the battery cell size to match the layout of the vehicle, more batteries can be placed more efficiently, so that the volume of the battery box remains unchanged, the number of new batteries is added, and a longer driving range is achieved. In short, improving battery energy density can be achieved through various methods. In addition to long-term planning, the immediate priority for automobile companies is to develop more reliable and economical lightweight materials. In the period when battery technology is facing bottlenecks, thinking more from the light-weight design concept is an important thrust of the electric vehicle technology revolution. No matter what kind of material the new battery is made of in the future, the materials that make up the battery pack can basically be used in general. It may not benefit much in the short term, but in the long run, this kind of basic research will not be futile. 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 post: What are the important components of lithium iron phosphate battery electrolyte?