China's first wireless charging lane for electric vehicles came out, charging while opening

In the past few years, with the increase in the number of smog days and the increasing intuition brought about by environmental pollution problems, Chinese's environmental awareness has also been increasing
.
With its new energy and zero-emission environmental advantages, electric vehicles are gaining an increasingly
important status in the hearts of many consumers.
However, the practicality of electric vehicles is not fully recognized
in the minds of many consumers.
The cumbersome and time-consuming charging of electric vehicles and concerns about range often deter consumers
.
What should I do if I travel in a hurry and suddenly run out of battery while driving?

Therefore, when Tesla electric vehicles came out, there were many people who were moved but did not dare to act
.
Even in recent years, the electric vehicle market has become more and more hot, BYD, Smart and other appearances have been made, most consumers are still waiting and seeing
.
Due to the limitations of current battery technology, electric vehicles themselves still have problems such as
high price, bulky body, large space occupied by battery packs, short cruising range, long one-time charging time and frequent charging.
The development of science and technology will never stop
.
At the beginning of this year, the bottleneck of "charging difficulty" of electric vehicles finally ushered in a solution - wireless charging technology
.
Moreover, it was Chinese invented
themselves.

"People always have dreams, as a scientific researcher, we must lead the times, and things that were unimaginable before, maybe one day they will really come true
.
" It turned out that as early as 2012, Dr.
Zhu Wenji, 29 years old of China Southern Power Grid Guangxi Electric Power Research Institute, and his young research team began the research of "Key Technologies of Wireless Power Transmission for Smart Grid" and embarked on the exploration
of "wireless charging and power supply technology for electric vehicles" 。 After 4 years of scientific research and experiments, at the beginning of this year, the project acceptance of "Research on Key Technologies of Wireless Power Transmission for Smart Grid" was completed, researchers developed a wireless power transmission system engineering design platform, developed a parked electric vehicle wireless charging device, and successfully built the first domestic electric vehicle wireless power supply small test lane, opening up the "last meter"
of electric vehicle charging.

As the technical leader of the project, Dr.
Zhu Wenji said: "In the future, everyone can charge while driving, and even electric vehicles without on-board batteries can solve the problem of
power supply.
"Charging while walking, electric vehicles have ushered in a beautiful era
of wireless power supply.

Electric vehicle wireless power supply lanes can be popularized and used on fixed bus routes, highways, and
scenic roads.
Zhu Wenji said: "The wireless power supply lane is similar to a gas station, when the electric vehicle is low on power, it can drive into the lane with the wireless power supply system, charging while walking, and the whole process does not require the driver to get out of the car to operate
.
" ”

For safety issues, Zhu Wenji said that there is no direct contact with wires during the power transmission process, and there is no potential danger to power safety; As for electromagnetic radiation, it was considered at the beginning of the system design, and after testing by a third-party testing agency, it not only met the international radiation standard, but also half of the standard, and would not endanger the driver's health
.

Zhu Wenji said that the current electric vehicles mainly use conductive charging
.
This "tail" charging method requires the use of charging cables to connect the charger and the electric vehicle
.
The wireless charging technology, which gets rid of the shackles of the charging "tail", can not only realize wireless charging during the parking process of electric vehicles by installing parked electric vehicle wireless charging devices in garages, parking lots, bus stops and other vehicle parking places; The system can also remotely adjust the charging time at any time and monitor the vehicle status in real time, so as to realize automatic power
off after full charge.

The most gratifying thing for electric vehicle consumers is that the wireless power supply lane of electric vehicles developed by Zhu Wenji's team is "not picky" and "not squeamish", and any brand of electric vehicles can be used, just install a wireless receiving device
.
And the charging time is greatly reduced, taking an electric car with a total battery capacity of 24 kWh as an example, if charged with 30 kWh, it can be fully charged
in less than 1 hour.

The project research process was not always smooth
.
In 2013, when the project was about to be completed, Zhu Wenji and her research team found that although the power conversion efficiency was significantly improved from 65% before the project, there was still potential to be tapped
.
At that time, 1 kWh of electricity was transmitted from the grid to the car, and after removing some of the inevitable losses, the car could receive 75%.

In line with the attitude of being responsible for scientific research, Zhu Wenji applied to postpone the completion of the project by 2 years
.
Researchers finally successfully increased the power conversion efficiency to 85%, successfully won the wireless power supply technology of electric vehicles, and reached the domestic and even the world's advanced level
.

In mid-April this year, the National Development and Reform Commission and the National Energy Administration jointly issued the "Energy Technology Revolution Innovation Action Plan (2016-2030)" and the "Energy Technology Revolution Key Innovation Action Roadmap", which clearly stated that by 2020, wireless charging of electric vehicles will be used as a breakthrough point and application object, and high-efficiency and low-cost wireless power transmission systems will be developed to achieve stop-and-charge and even charging
while driving.