New energy vehicles on photovoltaic highways "run farther and farther"?

New energy vehicles certainly need to run while charging at high speeds, which must also be a problem that photovoltaic roads need to solve. It is understood that the current wireless car charging technology has become more mature. In 2013, the world’s first wireless charging bus lane was built in Korea. On May 18 of this year, Qualcomm has realized wireless charging under the condition of an electric vehicle speed of 100km/h.

Technology: Wireless charging technology has matured

According to CCTV, the high-speed road surface of Jinan South Ring Expressway has been connected to the grid to generate electricity. The electricity generated by this photovoltaic road surface has been connected to the charging pile.

Zhang Hongchao, professor of Tongji University School of Transportation Engineering, which provides core technologies, said that by linking up with electric vehicle technology, photovoltaic road surface can realize the mobile charging of vehicles. The highway network throughout the country will become a mobile “solar charging treasure”.

Coincidentally, last year, Normandy, France, paved the world's first photovoltaic road. The world's first solar energy road is located on the RD5 provincial road in the village of Tuluvre. There are an average of 2,000 drivers driving through the road every day!

Looking at the world, the combination of road and photovoltaic power generation is a new application model, and many countries are trying.

China's science and technology are always making progress in learning and learning.

Breakthrough: New energy wireless charging for electric vehicles

Recently, Tianjin Science and Technology University's Professor Yang Qingxin presided over the Tianjin Science and Technology Support Plan project, based on the wind-solar hybrid intelligent micro-grid-based wireless charging system for electric vehicles.

Experts agreed that the results of this project have resulted in a large number of innovative achievements with independent intellectual property rights, which have filled the gaps in the country and have reached an internationally advanced level. The major indicators have reached internationally advanced levels.

Professor Yang Qingxin’s scientific research team uses an integrated distributed power supply (photovoltaic, wind power, etc.), load, energy storage systems, and control devices to form an independent microgrid that powers electric vehicles. For the first time, this project proposes a new model of wireless charging for electric vehicles that operates independently of the grid, avoiding the impact of current and harmonics on the grid, and enhancing the flexibility of electric vehicle charging. The results of this project not only can effectively reduce the threat of large-scale electric vehicle charging to the power grid, but also can absorb new energy on the spot, achieve true “zero emission”, and help improve the overall economic and environmental performance of the energy system. Benefits can be widely used in areas where the power grid system is weak, such as islands, grasslands, and scenic spots.

At present, some of the research results of the project are already in the State Grid Corporation of China, Jiangxi Provincial Power Company, Beijing Haiyang Energy Group Co., Ltd., Xiamen New Page Technology Co., Ltd., Shanghai Wanan Yichuang Technology Co., Ltd., and Baoding Hongri Electric Co., Ltd. The company gets applied.

Comparison: What are the advantages and disadvantages of photovoltaic roads?

The greatest advantage of photovoltaic roads is that they can generate electricity and provide electricity directly to various facilities along the road. According to reports, this solar energy road to be built in Jinan has already been connected to the grid to generate electricity. Modular, road maintenance will not need to open the road, dusty. In addition, it is possible to automatically display the adjusted road markings (estimated unemployed brush crossing lines).

In addition, the road surface can also achieve electric heat conversion, improve vehicle safety.

But the most attractive advantage of the PV road is that it can wirelessly charge magnetic induction for electric vehicles that are traveling and parked on it. For electric cars, it is undoubtedly a boon. More and more cars will support wireless charging in the future. This technology is not difficult to realize now.

What are the disadvantages of photovoltaic roads?

First, the cost is expensive. On December 23, 2016, the world’s first solar road was built in Tourouvre, a small town in Normandy, France. The road is 1 km long and 2 meters wide. It is covered by 2800 square meters of solar panels. Cost 5 million euros.

Second, there are uncertainties in the service life of battery panels and high maintenance costs.

Third, there are certain security risks.

Although there are many technical and cost deficiencies, but the United States, Italy, the Netherlands, the United Kingdom, Germany, Switzerland, Belgium, Australia, Japan and other countries are conducting related research.

Since the cost is so high, we will buy more electric cars in the future. Otherwise, wouldn’t it be a waste if we pay such a good tax?

China's construction of this photovoltaic road has fundamentally been said to have come to the forefront of world trend science and technology. Relatively speaking, the technology adopted in China is currently the most advanced material technology, which can minimize the cost. Its cost is only a little higher than the traditional paving of asphalt, but its durability has been increased by more than one point, and compensation for electricity has completely compensated for the higher costs and maintenance costs.

Popular Science: Wireless Charging

In recent years, the new type of inductive charging technology for electric vehicles has developed rapidly. The inductive charger is a transformer principle that uses a high-frequency alternating magnetic field to sense the power from the original side of the vehicle to the side of the vehicle to achieve the purpose of charging the battery. The greatest advantage of inductive charging is safety. This is because there is no direct point contact between the charger and the electric vehicle, so that even if the electric vehicle is charged in a bad climate, such as rain or snow, there is no danger of electric shock.

The wireless charging method of electric vehicles is a foreign research result in recent years. Its principle is like a mobile phone used in a car. It converts electric energy into a special laser or microwave beam that meets the requirements of current technical standards. It is installed on the top of a car. A dedicated antenna can be received.

With wireless charging technology, electric vehicles or dual-energy vehicles driving on the road can be quickly recharged with transmitters installed on utility poles or other high-rise buildings. The electricity bill will be deducted from the prepaid card installed in the car.