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."
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