On June 2, the media reported that a Tesla Model S caught fire and completely burned while charging at a Supercharger station in Antwerp, Belgium. This is at least the fourth Tesla spontaneous combustion incident in the past two months.

　　On the other side of the ocean, Chai Wei is always paying attention to every movement in the electric vehicle industry. Tesla has had 4 spontaneous combustion incidents in two months. Is this a coincidence? At present, almost all automobile manufacturers are deploying new energy vehicles. What are the bottlenecks in the popularization of electric vehicles in China?

　　Chai Wei is the chairman of Zhejiang Volta Technology Co., Ltd. The company is mainly engaged in the research and development of automotive battery technology and battery products. Now, he has a high-energy fast-charging power lithium-ion battery technology. Will it bring changes to the industry?

　　On June 11, Volta Technology held a press conference to officially launch the world's first industrialized Folta-1.2 series high-energy fast-charging power lithium-ion battery technology. The battery can achieve "5 minutes of charging and a range of 260 kilometers", which caused a huge shock in the industry.

　　“Consumer Anxiety” in the Popularization of Electric Vehicles

　　Tesla, Mercedes-Benz, BMW, Toyota, Volkswagen, Geely, BYD... It seems that every car brand is laying out the "new track" of new energy vehicles, which is affected by factors such as "range anxiety" and "charging anxiety" , electric vehicles are still not the first choice for consumers.

　　It has attracted much attention, but it has been "stuck" in popularization. What is the reason? First of all, what everyone is most concerned about is the safety of pure electric vehicles. "In recent years, cases of spontaneous combustion and explosion of electric vehicles during charging have been common. Once spontaneous combustion occurs, the possibility of survival is extremely small. As a consumer, who is willing to put a time bomb next to them?" said Sun, who has been engaged in automotive media observation for many years. Sir said so.

　　Judging from the causes of spontaneous combustion of electric vehicles, most fire causes originate from the battery. "The power batteries installed in cars now on the market are all slow-charging batteries, which cause great damage to the battery. Many people believe that the spontaneous combustion of electric vehicles is caused by circuit short circuits. In fact, this is a misunderstanding. Most of the spontaneous combustion of electric vehicles is caused by It is caused by factors such as battery material and technical defects, as well as improper use by consumers," said Zhou Xiaoping, chief scientist of Volta Technology.

　　Zhou Xiaoping has been engaged in research in chemical engineering, physical chemistry, electrochemistry and other fields for a long time, and holds a lot of patents related to lithium batteries. "The positive electrode material of the battery is technologically fast-charging, but the negative electrode material is often graphite, which is lipophilic and cannot be fast-charged. In other words, the power batteries installed in cars now are inherently dangerous."

　　In addition to safety issues, consumers are also troubled by the cruising range of electric vehicles. This is also a headache for researchers at car manufacturers. If pure electric vehicles want to travel long distances, they need to take into account and consider more aspects than fuel vehicles. Much more. In addition, the popularity of supporting charging piles is not high. Consumers install charging piles by themselves. It is difficult to transform the power grid and has poor safety.

　　At present, new energy vehicles have become the most dynamic sector in the automobile market. Statistics show that by 2018, China's new energy vehicle production and sales had reached 1.270 million and 1.256 million vehicles respectively, a year-on-year increase of 59.9% and 61.7% respectively. So, what kind of "reliable" battery does the electric vehicle market need?

　　"The popularization of electric vehicles now encounters 'pain points' such as slow charging, short lifespan, poor safety, and range anxiety. If there is a battery that can solve all these problems, it will greatly promote the popularity of pure electric vehicles." Chai Wei said.

　　The world's first high-energy fast-charging power lithium-ion battery technology debuts in Hangzhou

　　Does such a "once and for all" battery exist? On June 11, Zhejiang Volta Technology Co., Ltd. held a press conference in Hangzhou and officially released the world's first industrialized Folta-1.2 series high-energy fast-charging lithium-ion battery technology with independent intellectual property rights.

　　At the scene, Volta Technology also conducted an on-site charging and discharging demonstration of high-energy fast-charging power lithium-ion battery technology. At the same time, a set of data that shocked the industry was released: taking a small and medium-sized passenger car loaded with 50 kilowatt-hours of electricity as an example, this technology can charge the battery from 15% to 80% in 5 minutes, and the battery life can reach 260 kilometers; after charging for 10 minutes, the battery can be charged from 15% to 80%. 15% to 90%, the battery life can reach 300 kilometers; for a micro passenger car loaded with 25 kilowatt hours of electricity, the battery can be charged from 15% to 80% in 5 minutes, and the battery life can reach 180 kilometers; after charging for 10 minutes, the battery can be charged from 15% to 80% 90%, with a range of up to 200 kilometers.

　　According to reports, the Folta-1.2 series high-energy fast-charging power lithium-ion battery product technology extends the mileage through fast charging, and its charging speed can be equivalent to the refueling time of traditional fuel vehicles, fundamentally solving the current problem of slow charging pure electric vehicles. Range anxiety issues. "The power battery must ensure that the cycle life is greater than 5,000 times under 10 minutes of charging and discharging." Chai Wei said.

　　At present, the Folta-1.2 series of high-energy fast-charging power lithium-ion battery product technology developed based on "lithium-ion fast conduction" material technology has completed the Folta-1.2 series of high-energy fast-charging power lithium-ion battery technology with a number of domestic vehicle manufacturers. The battery cell product technology has been jointly tested and the technology has met the conditions for industrialization.

　　At the same time, Volta Technology also has its own solutions when it comes to building and developing centralized fast charging stations. Taking Hangzhou as an example, there are currently 53 gas stations in the main urban area, which can basically meet the refueling needs of Hangzhou's 2 million gasoline vehicles. "The State Grid operates dedicated lines and uniformly allocates electricity. If 10 centralized fast charging stations are built in Hangzhou, and each fast charging station is equipped with an average of 20 charging piles, it can meet the charging needs of electric vehicles."

Read recommendations:

R14

18650 rechargeable battery lithium 3.7v 3500mah.Why 18650 lithium batteries can be widely used

Graphite negative electrode for lithium batteries

18650 lithium ion battery

18650 li-ion battery