The hottest article to understand the development

2022-08-07
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In recent years, the development and application of solar photovoltaic technology in China has been accelerating. In the field of transportation system, solar photovoltaic highway technology has developed rapidly. Simply understand, solar photovoltaic technology is a technology that converts solar energy into electric energy. Solar photovoltaic highway technology is referred to as photovoltaic highway technology for short, which mainly involves photovoltaic pavement and charging of moving electric vehicles

the basic principle of photovoltaic highway technology is to lay photovoltaic panels on the highway, which can not only meet the land occupation demand of solar photovoltaic technology, but also provide electric energy for electric vehicles driving on it. On the photovoltaic highway, it is convenient to charge the moving vehicles, and the vehicles can complete the electric energy supplement without stopping, including wired charging and wireless charging, especially the wireless charging

rapid technological development

the author found in the Chinese patent digest database that as of march26,2018, there were more than 300 published Chinese patent applications related to the overall structure and laying method of photovoltaic pavement, more than 8700 published Chinese patent applications related to solar cells, and more than 2800 Chinese patent applications related to surface and bottom materials such as epoxy resin, tempered glass and transparent concrete, There are more than 700 Chinese patent applications related to wireless charging of traveling vehicles and more than 100 Chinese patent applications related to wired charging of traveling vehicles

as for the overall structure of 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 guide rails are laid on them to run electric trains

with regard to the charging technology of moving vehicles, relevant patent applications have improved the battery, circuit, coil, conductive track of the road and vehicle, as well as the coordination mode between the vehicle and the road energy source. In order to improve the paving efficiency and simplify the construction, a patent application related to a solar road pavement modular building material device 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 for setting the wireless charging device on the road. The transmitting end is installed under the highway lane at an interval of 100 to 1000 meters, and the vertical distance between the transmitting end and the on-board receiving end is 5 to 400 mm. When the on-board receiving end is 10 to 20 meters away from the transmitting end, the charging is started through pulse electromagnetic wave The on-board charging and discharging supercapacitor module and on-board battery realize the transmission and storage of electric energy, and can transmit high-frequency AC of 50Hz to 100MHz. The anti electromagnetic interference layer is set in the vehicle to prevent electromagnetic interference from affecting the instruments and instruments in the vehicle

road performance is one of the key requirements of photovoltaic pavement technology. Only when the photovoltaic pavement structure and materials meet the road performance can they be put into large-scale implementation. A patent application submitted by a university in 2014 proposed a pavement structural unit, in which a solar panel was set in the concrete depression and a polymethylmethacrylate (PMMA) light transmission protection plate was covered on it. A structural size model that can meet the mechanical performance requirements of safe driving when the standard axle load is at the most unfavorable load level was obtained

as for the charging technology of moving vehicles, how to realize the continuous dynamic coupling between the transmitting coil and the receiving coil is an important issue that has been continuously concerned. In a patent application submitted in 2017 by a company consisting of a male lead screw and a moving beam) and a working oil cylinder, piston, workbench, light bar and upper beam), a charging system is disclosed, which dynamically switches the working state of the radiation coil according to the position of the on-board wireless charging device, controls one or more power supplies to provide electric energy according to the working state, and realizes 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 appear in a patent application, which expand the ice and snow melting function, road cooling function, additional landscape function, waste heat utilization, power utilization, human and road information interaction, vehicle and road information interaction, and some assembly structure improvements on how to improve construction efficiency, such as assembly support, assembly hole, etc

problems need to be solved

at present, photovoltaic highway technology still faces many challenges from large-scale application, mainly including road performance of new materials and new structural pavement, photovoltaic power generation efficiency, charging efficiency during driving, etc. Specifically, it mainly involves the strength of new material pavement, the warping of pavement, low-temperature cracking of pavement materials, ultraviolet aging of materials caused by the severe impact of the eccentric load of the thermal expansion and cold contraction tensile testing machine on its normal operation, the extremely high requirements of the complex pavement structure on the construction process, the power generation efficiency under the condition of poor component service life, waterproof, corrosion prevention, durability, deformation and light, and the failure rate of photovoltaic modules, Stable power supply, low energy conversion efficiency of solar panels, complex photovoltaic power generation potential regulation, large electromagnetic resonance coils and low induction transmission power, etc. As these problems are gradually clarified and solved, photovoltaic highway technology will continue to improve and will soon better serve people's lives

the published patent applications have disclosed the technical information of a large number of emerging new material enterprises, and set up various protection ranges. These technical information provide a strong technical support for the development of solar photovoltaic roads. For developers, making good use of these public technical information is more conducive to technological progress, and determining the appropriate protection range is more conducive to the protection of innovative achievements. For the builders of solar photovoltaic roads, producers and sellers of related products and users of related methods, they need to improve their awareness of intellectual property rights, promote the creation, protection and application of patents in the field of new energy transportation systems, and make intellectual property rights better promote the development of new energy transportation systems

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