Simply understand that solar photovoltaic technology is a technology that converts solar energy into electrical energy. Solar photovoltaic highway technology is referred to as photovoltaic highway technology, which mainly involves photovoltaic pavement and charging of electric vehicles in motion.

　　News from China Energy Storage Network: In recent years, the development and application of solar photovoltaic technology in my country has been accelerating. In the field of transportation systems, solar photovoltaic highway technology has developed rapidly. Simply understand that solar photovoltaic technology is a technology that converts solar energy into electrical energy. Solar photovoltaic highway technology is referred to as photovoltaic highway technology, which mainly involves photovoltaic pavement and charging of electric vehicles in motion.　　The basic principle of photovoltaic highway technology is to lay photovoltaic panels on the highway, which not only meets the land demand of solar photovoltaic technology, but also provides electricity for electric vehicles driving on it. Photovoltaic highways are convenient for charging vehicles on the move, and vehicles can complete electric energy supplementation without stopping, including wired charging and wireless charging, especially wireless charging.

　　The rapid development of technology

　　After searching in the China Patent Abstracts database, the author found that as of March 26, 2018, there were more than 300 published Chinese patent applications related to the overall structure and paving method of photovoltaic pavement, and there were published Chinese patent applications related to solar cells. There are more than 8,700 Chinese patent applications involving epoxy resin, tempered glass, light-transmitting concrete and other surface and bottom materials. There are more than 700 Chinese patent applications involving wireless charging of moving vehicles, and Chinese patents involving wired charging of moving vehicles There are more than 100 applications.

　　Regarding the overall structure of the photovoltaic pavement, the earlier application was submitted by an individual applicant in 2008. The technical proposal discloses that a layer of transparent and translucent glass or plastic is added to the upper layer of ordinary solar cells to support the operation of electric vehicles. Or lay rails on it to run electric trains.

　　Regarding the charging technology of vehicles on the move, related patent applications have improved the road surface and the vehicle’s battery, circuit, coil, conductive track, and the way the vehicle and the road energy source cooperate. In order to improve the paving efficiency and simplify the construction, a related patent application for a modular building material device for solar road pavement discloses an improved paving method. The wireless charging device on the road is an important part of the charging technology of traveling vehicles. A patent application discloses some specific parameters of the wireless charging device on the road. The transmitting end is installed under the road lane at an interval of 100 to 1000 meters. The vertical distance from the vehicle receiving end is 5 mm to 400 mm. When the vehicle receiving end is 10 to 20 meters away from the transmitting end, charging is started, and electric energy transmission and storage are realized through pulsed electromagnetic waves, vehicle charging and discharging super capacitor modules, and vehicle batteries. Transmit high-frequency alternating current from 50KHZ to 100MHZ, and an anti-electromagnetic interference layer is installed in the car to prevent electromagnetic interference from affecting the instruments and instruments in the car.

　　Road performance is one of the key requirements of photovoltaic pavement technology. Only when photovoltaic pavement structures and materials meet the road performance can they be put into large-scale implementation and utilization. A patent application filed by a university in 2014 proposed a pavement structural unit, in which solar panels are set in a concrete recess, and a polymethylmethacrylate (PMMA) light-transmitting protection board is covered on the top, which has obtained the standard axle load. In the most unfavorable load position, a structural size model that can also meet the mechanical performance requirements of safe driving.

　　Regarding the charging technology of traveling vehicles, how to realize the continuous dynamic coupling of the transmitting coil and the receiving coil is an important issue that has been continuously concerned. In a patent application filed by a company in 2017, a charging system was disclosed, which dynamically switches the working state of the transmitting coil according to the position of the on-board wireless charging device, and controls one or more power sources to provide electric energy according to the working state to achieve continuous Dynamic coupling.

　　With the development of technology, the core basic functions of photovoltaic pavement have gradually derived some composite applications. For example, some composite structural units appeared in a patent application, which expanded the functions of melting ice and snow, cooling the road surface, additional landscape functions, waste heat utilization, power utilization, human-road information interaction, vehicle-road information interaction, etc., and some related information How to improve the construction efficiency of the assembly structure, such as assembly brackets, assembly holes, etc.

　　The problem needs to be broken through

　　At present, the large-scale application of photovoltaic highway technology still faces many challenges, mainly including new materials, road performance problems of new structure pavement, photovoltaic power generation efficiency problems, and charging efficiency problems during driving. Specifically, it mainly involves the strength of the new material pavement, the warping of the pavement caused by thermal expansion and contraction, the low-temperature cracking of the pavement material, and the ultraviolet aging of the material. The complex structure of the pavement requires extremely high construction technology. The service life of the components Waterproof, anti-corrosion, durability, deformation, power generation efficiency problems under poor light conditions, photovoltaic module failure rate problems, stable power supply problems, low energy conversion efficiency of solar panels themselves, complex photovoltaic power generation potential adjustment problems , The electromagnetic resonance coil is huge and the induced transmission power is low. As these problems are gradually clarified and solved, the photovoltaic highway technology will continue to improve, and soon it will better serve people's lives.

　　The published patent applications disclose a large amount of technical information and set up a variety of different protection scopes. This technical information provides strong technical support for the development of solar photovoltaic highways. For developers, it is more important to make good use of this public technical information. It is conducive to technological progress and determining the appropriate scope of protection is more conducive to the protection of innovations. For builders of solar photovoltaic roads, manufacturers and sellers of related products, and users of related methods, they need to increase their intellectual property awareness, promote the creation, protection and application of patents in the field of new energy transportation systems, and make intellectual property better Promote the development of new energy transportation systems.