How to increase the energy density of lithium batteries?

How to increase the energy density of lithium batteries? With the same energy consumption and the same volume and weight of the battery pack, the maximum driving range of a single new energy vehicle is mainly determined by the energy density of the battery. Energy density is the amount of energy stored in a given space or mass unit. The energy density of a battery is the amount of electrical energy released per unit volume or mass of the battery. The energy density of a battery is generally divided into two dimensions: weight energy density and volume energy density. According to 'Made in my country 2025This is the energy density of a single cell. System energy density refers to the ratio of the power of the entire battery system to the weight or volume of the entire battery system after the monomer combination is completed. Because battery systems include battery management systems, thermal management systems, high and low voltage circuits, etc., they occupy part of the weight and internal space of the battery system, so the energy density of the battery system is lower than a single energy density. Generally speaking, the four parts of a lithium battery are critical: positive electrode, negative electrode, electrolyte and separator. The positive and negative poles are the sites of chemical reactions, which are equivalent to the two veins of the governor. We all know that the energy density of the lithium ternary battery pack system is higher than that of the lithium iron phosphate battery pack system. Why is this? Graphite is the most important anode material for existing lithium batteries. The theoretical capacity of graphite is 372mAh/g. The capacity of the cathode material is only 160 mAh/g, while the capacity of the ternary material is about 200 mAh/g. Of course, in addition to the chemical system, the processing level, such as compaction density, foil thickness, etc., will also affect the energy density. Generally speaking, the higher the compaction density, the greater the capacity of the battery in a limited space. Therefore, the compaction density of important materials is also regarded as one of the reference indicators of battery energy density. The adoption of new material systems, the fine adjustment of the structure of lithium batteries and the improvement of manufacturing capabilities are the three stages of Ru0026D engineers. In the next article, we will discuss it from two aspects: singleton and system. Battery manufacturers can achieve the effect of capacity expansion by adding the size of the primary battery. The most common example is that Tesla (tesla), a pioneer of the Panasonic 18650 battery and the popular electric car company, will replace it with a new 21700 battery. 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 article: Why do medical equipment need lithium battery UPS?