CR1625 battery.Technology continues to innovate, German companies produce lightweight battery casings

　　According to foreign media reports, Germany's SGL Carbon recently announced that it has cooperated with Chinese automaker NIO to develop a carbon fiber reinforced plastic (CFRP) battery casing prototype for electric vehicles.

　　At present, most power battery pack casings for electric vehicles are made of aluminum and steel. In comparison, CFRP battery casings are about 40% lighter than previous traditional materials, have high rigidity, and have a thermal conductivity 200 times lower than aluminum. .

　　Sebastian Grasser, Automotive Segment Manager of SGL Carbon’s Composites – Fibers & Materials Division, said: “In addition, the composite material also performs well in terms of water tightness, air tightness and corrosion resistance.”

　　The base plate and lid of the battery box are made from a sandwich core and several layers of carbon gel. The production tooling for the base plate and lid was designed by SGL Carbon's Lightweight and Application Center for this purpose. Carbon fiber for similar parts is produced at SGL plants in Moses Lake, Wash. and Muir of Ord, England. It is processed into coarse cloth at the SGL plant in Wackersdorf, Germany; and then at the SGL plant in Ried im Innkreis, Austria. Production of base plates and covers, as well as assembly of individual components.

　　Battery packs using this material can not only reduce a certain amount of weight for NIO's electric models, but also make battery swapping more convenient. It is understood that the replacement can be completed within three minutes at the NIO battery replacement station.

　　Dr. Wei Bin, NIO's lightweight engineering manager, said: "Lightweight structure is a core element of NIO's technical roadmap. The use of composite materials, especially the use of high-performance carbon fiber in the battery housing system, can allow NIO to have better Dynamic driving performance, longer cruising range, and the battery pack can also have ultra-high energy density (more than 180 Wh/kg).”

　　SGL Carbon expects that demand for lightweight battery box solutions from the automotive industry will increase significantly in the coming years as electric mobility continues to develop. The company is already working with different partners to further develop different battery cases made of composite materials. In the future, this type of battery box will be suitable for electric vehicle batteries of various sizes and designs.

　　SGL Carbon Group is an international manufacturer of carbon graphite products, headquartered in Wiesbaden, Germany. The group's three major product series are graphite electrodes, special graphite and graphite anti-corrosion process equipment, and graphite for high-tech fields. It is used in steel, chemical industry, machinery, automobile, electronics, energy and special aerospace.

　　SGL Carbon has established 30 production bases in Europe, North America and Asia, and its sales and service network covers more than 90 countries around the world. As a world-renowned expert in carbon graphite raw materials, SGL has advanced technology and a complete production system. of SGL Carbon Group.

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