Brief introduction to the prospects of power lithium-ion battery pack technology

First, the lithium-ion power lithium battery is expected to achieve the 300 watt-hour/kg policy by 2020. At present, the research and development of the surface and the inside of the sea is basically at the same level, but the safety research needs to be enhanced. The focus of this battery is safety. Second, the new energy passenger car is particularly the car’s volume-specific energy requirement, which is probably more important than weight than energy. Although there is a 400 watt-hour/kg battery, the volume-specific energy is only 400 watt-hour/liter. This is about the car. It's not very easy to use. Under normal circumstances, the weight-to-weight specific energy of a lithium-ion battery can reach 300 watt-hours/kg, and the volume-to-volume specific energy can reach 600 watt-hours/liter. Lithium atmosphere batteries have all the difficulties of zinc atmosphere batteries, hydrogen fuel power batteries, and lithium secondary batteries. In contrast, hydrogen fuel power batteries have more competitive advantages. Third, the research and enrichment of solid-state batteries has continued to rise, but due to the two major problems of the invariance of the solid/solid interface and the rechargeability of lithium metal anodes, the true all-solid-state lithium-ion battery technology has not yet matured, but inorganic Sulfide as a solid electrolyte in lithium-ion batteries appears to be broken. Looking at the growth path of solid-state batteries in general, the electrolyte is probably from liquid, semi-solid, mixed solid-liquid to solid state, and finally to all solid state. As for the negative electrode, it will be from graphite negative electrode to silicon carbon negative electrode to alloyed negative electrode. We are now transitioning from graphite negative electrode to silicon carbon negative electrode. Finally, we will probably recover the metal lithium negative electrode, but there are still technical uncertainties. Fourth, my country made some breakthroughs in high-capacity lithium-rich cathode materials in 2017. Innovative lithium-ion batteries based on high-capacity lithium-rich cathodes and high-capacity silicon-carbon anodes are more feasible than lithium-sulfur and lithium atmosphere batteries. As an important component of new energy vehicles, the performance of the lithium-ion battery pack determines the comprehensive expression of the vehicle in a very high level. Although my country's new energy vehicles are growing rapidly, but at this stage of power lithium batteries, there is still a lot of room for promotion in terms of charging speed, cruising range, weight control, and low-temperature performance. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.