Charge 150 minutes to run 450 km "Wuxi made" electric car called Tesla

Gong Li test drive the first prototype car

Why can you surpass Tesla?

Overcome the world of charging cooling

At present, even if the Tesla electric vehicle uses the “super charging station” with the highest charging efficiency, it will take at least 80 minutes to fully charge the battery under the charging conditions of 380V/280A. The electric vehicle prototype designed and developed by the Jiangda cooperation team can realize rapid charging in 15 minutes, and it can run for 450 kilometers. Fast charge capability surpasses Tesla. How does this happen?

"Actually, batteries that can be quickly charged are not the most advanced inventions," Sun Jihong, a key member of the Duke EV3.0 team, told reporters that countries including the United States, Japan, South Korea and China have now developed The battery is quickly charged and discharged in minutes, "But the development of the battery does not mean that it can be practically used, because the battery will generate a lot of heat during fast charging. One battery is okay, but if several battery packs are In the car, it will cause the battery temperature to be too high and be discarded.” He said that on the surface, the most pressing problem for electric vehicles is how to achieve fast charging. In fact, the biggest technical bottleneck is how to solve the heat dissipation problem in the charging process.

“Our solution draws on the concept of heat dissipation in laptops,” Sun Jihong revealed. The chassis of the prototype was made of aluminum alloy profiles. The rapidly recharging lithium iron phosphate battery packs were distributed in the chassis according to a special design. Become the best conductor for battery heat dissipation. "At first glance looks similar to that of the Tesla Model S. However, we use air-cooling, while Tesla uses liquid cooling, our battery pack and aluminum. Chassis contact for heat dissipation does not require a bulky cooling system, and since we are using a lithium iron phosphate battery, it is also superior to Tesla's lithium cobalt oxide battery in terms of stability and safety."

Where are the key technical tips?

Uses the world's most bovine aluminum technology

According to reports, the "Duke EV3.0" prototype car with fast-charged batteries from Suzhou, the entire aluminum chassis is made by an aluminum company in Nantong. "If we don't integrate relevant resources and propose design concepts, Nantong will never think that its own process can be used to make electric vehicles," Sun Jihong said.

Gong Li, deputy dean of the School of Design at Jiangnan University and head of the DESIS team, explained that in fact, after the country has invested continuously in the new energy automotive industry for many years, many links and technologies in the domestic industry chain have reached a very high level. Compared with the world's advanced level, China has achieved 80 to 90 points in many aspects of electric vehicles, and there are also individual world-leading technologies. For example, the aluminum company in Nantong, "This company's aluminum production process is the world's top, and only their company's aluminum profiles can produce a car chassis that meets the design accuracy."

“In the design of electric vehicles, we have grasped the leading technology in aluminum alloy extrusions in China, and wrapped up the relevant technologies as the core, and finally produced a complete solution for fast charging technology for electric vehicles. Sun Jihong said that during the design process, the team even adopted the first prototype car, and then improved the design of the program according to the problems encountered in the production.

How far is it from mass production?

Equal to "packing on the chassis", this is not too difficult

"Because of limited funds, we can only use a 300V/260A charger for prototype test, but we can already achieve the goal of 15 minutes fast charging," Sun Jihong said, because the power of the charger is not too high, so Only one of the four batteries can be charged at a time. “Our ideal charger needs to provide 300V/1000A power, but this technology is not difficult, it is equivalent to using 4 low-power chargers at the same time The four batteries are charged together and the time is still the same."

So how long is it to go from the current prototype to mass production in the market? "At present, the basic performance tests of our prototype cars have been completed. Don't look at the appearance is very simple. In fact, the most important thing for a car is the chassis. The rest can be made by adding a shell to the chassis." Sun Jihong said that at present they have A complete business plan was formulated for the research results. “We intend to take the path of special hatching and achieve marketization through links with the national level.” In his opinion, there is only a sample car at present, and there is still industrialization. A certain distance, but there are fast charging technology solutions will make China has a unique opportunity to achieve the corner in the field of electric vehicles overtaking, to make the world's most advanced pure electric vehicles and industrial ecological chain, as the industry's main standard setters and industries leader.

Gong Li said that the electric vehicle project has attracted the attention of the Chinese Academy of Engineering. Professor Wang Binggang, head of the National Clean Vehicle Action Coordination Leading Group Expert Group, was very excited to hear about the results of this research. “If you successfully test your achievements, then it is definitely a revolution in the electric vehicle industry that has achieved the goal of electric vehicles ahead of schedule.”

Latest news: Third-party inspections in Shanghai before the Spring Festival

“Third-party inspections will be conducted before the year before,” said Gong Li, and the test site is expected to be in Shanghai. “At the moment we will continue to make some improvements to the prototype to ensure that it can be passed once during the inspection.” He also said that In fact, the test is the three most important indicators, 1.6 tons of vehicle weight, 15 minutes of charging time, running 450 kilometers, no matter what technology and innovation, for users, these three indicators are good for use. In our own experiments, they are all complete. To do third-party testing is just a procedure.