Trial production of 10Ah large-capacity all-solid-state batteries for Hongqi Automobile completed

According to news from IT House on December 24, according to Hongqi Automobile, the Battery Development Department of the New Energy Development Institute of Hongqi Research and Development Institute has successfully assembled 10Ah large-capacity all-solid-state batteries, which can greatly improve the safety of new energy vehicle batteries and solve the problems that users are concerned about. Pain points such as charging time and endurance performance.

10Ah All Solid Li-ion Soft Pack Battery

According to Hongqi, all-solid-state batteries have the advantages of high safety and high specific energy, and are the first choice for the next generation of power batteries. However, there are still many key scientific and technological issues that need to be solved urgently, such as poor structural stability of materials, large volume expansion, failure of material interface contact, etc.

The all-solid-state battery development team focuses on the multi-dimensional problem of “material-system-structure-cell” to jointly tackle the key technologies of all-solid-state batteries. IT Home learned that in order to increase the energy density of the battery cell, the team developed a new type of high specific energy positive electrode, negative electrode and high conductivity, high air stability sulfide electrolyte material. The capacity of the negative electrode is about 10 times higher than that of the conventional graphite negative electrode. The capacity of the positive electrode material It can play the level of liquid battery, and the performance of the all-solid-state battery is excellent, and the cycle has exceeded 2000 times.

Targeted development of innovative processes such as gravure printing and isostatic pressing, the development team has made important breakthroughs in the core technology of all-solid-state batteries, and has applied for more than 40 patents for all-solid-state batteries. Lay a solid foundation for achieving the goal of 350Wh/kg energy density.

By tackling the key materials of all-solid-state batteries, solid-solid interface, battery structure, battery manufacturing process, and large-capacity battery development and evaluation methods, the Hongqi development team has successfully assembled a 10Ah large-capacity all-solid-state battery , to achieve phased victory.