Increasing battery volume energy density -Lithium - Ion Battery Equipment

How to improve the volume energy density of battery -Lithium - Ion Battery Equipment

How to increase the volume energy density of lithium -ion battery production manufacturers? Energy density refers to the amount of reserves in a certain space or quality material in the unit. The energy density of the battery is the power released by the average unit volume or mass of the battery. Destiny. The following lithium -ion battery manufacturers interpret how to improve the volume energy density of lithium -ion battery?

How to increase the volume energy density of lithium -ion battery production manufacturers?

Taking lithium -ion batteries as an example, it has an advantage in volume energy density and has the potential and prospect of becoming the mainstream technology of power lithium batteries, but the bottleneck is that the safety of high -energy power lithium batteries is relatively low. Some people question the development route of power lithium battery technology because of security issues.

1. Reduce the compact density of the thin shell, the stream, the diaphragm, and the new electrode, reduce the amount of adhesive and conductive, and increase the content of active substances in the electrode; however, it will bring some risks: thin shell shell It will reduce the safety of the battery, the collector makes the electrode easily break, and the security of the thin septum is reduced. The density of the new electrode compact density may cause a decrease in the absorbing rate and the crispness of the chip.(Lithium - Ion Battery Equipment)

2. Mix high -capacity and low -pressure materials with high -pressure compact materials to form a composite material system to improve the compact density of the composite material system.

3. Select positive and negative materials with high ratio or high -voltage platform.

Lithium sulfur batteries are regarded as one of the ideal choices of the next -generation high -energy density battery system. They have attracted great attention from the world's scientific research and industry. Lithium sulfur batteries also face increasingly severe challenges. The current commercial lithium -ion battery energy density is about 260Wh/kg and 700WH/L.

At present, the important problem is that the volume energy density is low, which leads to the loss of competitiveness in many important market applications. At the same time, the amount of high -electrode solution has also become a bottleneck for increased weight energy density. In addition, the safety of metal lithium negative electrode and long cycle life have not been solved well. The energy density of lithium -ion batteries is high. The most density and quality energy of its volume energy and mass can reach 450Wh/DM3 and 150Wh/Kg, respectively.

The reason for the low volume energy density of lithium sulfur batteries is important. The following two points are: from this sign, the theoretical density of lithium and sulfur in active substances is relatively low, lithium 0.534g/cm3, sulfur 2.07g/cm3, and lithium -ion batteries in lithium -ion batteries The theoretical density of lithium cobaltate and ternary materials is much higher;

From the perspective of the electrode structure, the most important reason is that the sulfur is electron and ion insulator, so it is necessary to disperse sulfur to a large amount of high -ratio -area conductive carbon to exert its capacity. It is that the entire positive pole is high and the pore rate is very high. Generally speaking, the pore rate of traditional carbon sulfur positive poles is twice that of the positive electrode of the lithium ion battery.

Lithium -ion batteries are considered to be ceiling that has basically reached the theoretical value of energy density. In recent years, it has stated that lithium monomer energy density is 165Wh/kg, and the bag is 140Wh/kg. In the next two years, the planning single energy density will increase to more than 180Wh/kg, the volume will increase by 50%compared to the energy density, the bag will be increased to 160Wh/kg, and the life expectancy is 8 million kilometers, and the cost can be saved by 30%.

It turned out that many models could not put lithium -ion batteries. It is important that in the past, lithium -ion batteries were too large, but the volume energy density was indeed a concept that many people in the industry recognized. From the perspective of car use, the volume energy density of lithium -ion batteries is more important, rather than weight energy density.



Contact Us

24 hours online service