2021-11-08 15:47:51.0
We learned from GAC Aean that AION GAM6480BEVB0P pure electric models have entered the latest batch of new energy vehicle promotion catalog of the Ministry of Industry and Information Technology, and will be unveiled at the Guangzhou Auto Show this year. At the beginning of this year, the GAC Aean ultra-long life "battery black technology" technology has finally landed.
This model uses sponge silicon anode battery technology, and is also the first pure electric model in the world to achieve a endurance of more than 1000km.
Under the driving range of 1000km, if the daily commute of 40km, the vehicle is charged 1-2 times a month to meet the needs. The promotional posters released by GAC before even had the slogan "silicon negative batteries let electric vehicles enter the 'monthly charging era'".
Public information shows that the model is equipped with nickel cobalt manganese ternary lithium battery. According to the official disclosure, AION LX(configuration | inquiry) in the summer test, under the condition of keeping the air conditioning on, its measured comprehensive road endurance of 904 kilometers.
Why can sponge silicon anode cell technology be regarded as "black technology"?
Gac officially released the sponge silicon negative chip battery technology in April. According to the official, the battery cell with this technology has an energy density of 280wh/kg, and combined with highly integrated battery pack technology, the entire pack can exceed 150kWh.Under this technology, the silicon anode sheet inside the battery is soft and elastic like a sponge, so that the expansion and contraction of silicon during the charge and discharge process is limited and buffered, and will not break; And let the silicon anode store more energy like a sponge absorbs water.The core advantage of this technology is that it dramatically reduces the mass and size of the battery. In the case of the same power, the power battery cell can achieve a volume reduction of 20% and a weight reduction of 14%; The company said that in the future, it will further reduce the volume and weight by more than half.
Silicon-based negative electrode industrialization continues to spread the "silicon-based era".Since the beginning of this year, the development momentum of new energy vehicles has been rapid, and the penetration rate has continued to rise. At the same time, in the face of the reality of the current charging layout is not yet perfect "pain points", some consumers with long-distance travel needs also put forward higher requirements for mileage.Industry chain manufacturers in the mileage of the "arms race" increasingly fierce. Previously, Weilai and Zhiji also revealed that car models will achieve (nearly) 1000km NEDC endurance, and Guoxuan High-tech has also launched "high-tech capacity silicon anode material" lithium battery products.
Coupled with the GAC Aean sponge silicon negative sheet battery technology described above, in general, these high-capacity, long-life power batteries are mostly inseparable from the silicon-based negative electrode. In addition to lithium, high nickel, sodium and other cathode materials, the negative electrode is gradually getting attention from the industry. At present, the mainstream negative electrode material in the market is still graphite, but its theoretical capacity limit is 372mAh/g, and high-end products have reached 360-365mAh/g, close to the upper limit, and new materials with higher energy density are urgently needed to meet the requirements of technological progress. Therefore, silicon with a theoretical capacity of 4200mAh/g has become the next generation of negative electrode materials recognized by the market.A recent report from Minmetals Securities pointed out that GAC Aean's new battery technology is the first time in the world to apply new silicon anode materials to large-scale power battery cell products, making the power field of silicon materials more practical.In addition, a number of manufacturers have joined the industrialization process of silicon-based negative electrodes.
Tesla has applied silicon carbon negative electrode to Model 3(configuration | inquiry), adding 10% silicon to artificial graphite, the negative electrode capacity increased to 550mAh/g, single energy density of 300Wh/kg; Japanese GS Yuasa company silicon based negative electrode has been applied to Mitsubishi cars.
In China, Ningde Times, Guoxuan High-tech, Wanxiang Group, BYD and other companies are stepping up research and development and trial production of silicon anode systems. Negative electrode enterprise Betrie has achieved silicon carbon negative maximum production, and for Panasonic supporting part of the material, Shanshan shares, Jiangxi Zichen, etc., with small trial production capacity.
The specific energy of high-nickel ternary + silicon carbon negative cell in Ningde era has reached 304Wh/kg, and the NCA+ silicon carbon negative cell of Risen has also reached 303Wh/kg.