Pavement adaptive to magnetic resonance type dynamic wireless charging system and construction process, lane and application thereof

Abstract

The invention discloses a pavement adaptive to a magnetic resonance type dynamic wireless charging system as well as a construction process, a lane and application of the pavement, and belongs to the field of road engineering and road infrastructures. The pavement comprises a lower surface layer, a middle surface layer and an upper surface layer, wherein an input power line of the magnetic resonance type dynamic wireless charging system is distributed on the surface of the middle surface layer, and then a synchronous broken stone sealing layer is adopted to ensure that the input power line is completely embedded; the middle of the upper surface layer is made of pouring asphalt concrete, and two sides are made of wear-resistant asphalt concrete; a transmitting coil of the magnetic resonance type dynamic wireless charging system is embedded in the pouring type asphalt concrete, and the transmitting coil is connected with an input power line. The mechanical compatibility performance of the transmitting coil and the road surface is improved through the special road surface design, the charging efficiency is greatly improved by cooperating with the control system to optimize electric energy input, wireless charging of the vehicle in the high-speed advancing process is finally achieved based on the magnetic resonance coupling principle, and the wireless charging device has the convenient construction technology and the excellent road performance.

Description

Technical Field

[0001] The present invention relates to the field of road engineering and road infrastructure, and in particular to a road surface adapted to a magnetic resonance dynamic wireless charging system, a construction process, a lane and an application thereof. Background Art

[0002] At present, the number of electric vehicles is growing rapidly, and the number of electric vehicles with large-scale development in the future is bound to be an astonishing number. Compared with traditional fuel vehicles, the biggest difference of electric vehicles is that the power source is electricity. The main reason why some potential electric vehicle consumers hesitate is the power supply and storage. At present, the energy supply method of electric vehicles is mostly wired charging, which has problems such as poor flexibility in connecting the car and the charging pile, poor safety due to frequent plugging and unplugging of the charging interface, and easy electric shock due to aging of the line. And with the popularization of new energy vehicles, the problem of long-distance endurance has also become a key issue in the new energy vehicle industry. Therefore, charging pavement with unlimited charging technology as the main feature has developed rapidly in recent years.

[0003] Dynamic wireless induction charging pavement is a new type of charging infrastructure that can continuously power electric vehicles on the move, which can effectively alleviate the endurance problem of electric vehicles and reduce users' dependence on batteries. Patent CN107974893B proposes a wireless charging highway pavement that can charge a large amount of electricity in a short period of time, but it cannot guarantee the road performance of the pavement and is difficult to construct; Patent CN117364557A discloses a pavement structure and its use method for wireless charging of new energy vehicles, which mainly adopts piezoelectric wireless charging, which is a contact charging with low safety; Patent CN109629371B discloses a solar photovoltaic pavement based on wireless charging technology, which meets the road load requirements, solar power generation requirements and dynamic wireless charging requirements of electric vehicles at the same time, but the pavement construction cost is high and the road performance is poor.

[0004] At present, wireless charging pavement has made many important research progress in many aspects such as charging system optimization design, power supply technology, and social benefit calculation. The successful laying and good operation of some indoor roads have also preliminarily verified the feasibility of this technology, but the dynamic charging efficiency of the charging system and the mechanical compatibility with the pavement structure cannot be guaranteed. Charging pavement still lacks high-performance wireless charging pavement structure design and application construction methods. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a road surface and its construction process, lane and application that are suitable for a magnetic resonance dynamic wireless charging system, which effectively improves the mechanical compatibility of the transmitting coil and the road, extends the service life of the coil and the road surface, and at the same time greatly improves the charging efficiency, thereby realizing efficient wireless charging of vehicles during high-speed travel.

[0006] In order to achieve the above purpose, the following technical solutions are adopted:

[0007] A road surface adapted for a magnetic resonance dynamic wireless charging system, the road surface comprising a lower layer, a middle layer and an upper layer; wherein:

[0008] The surface of the middle surface layer is provided with an input power line of the magnetic resonance dynamic wireless charging system, and then a synchronous gravel seal is used to ensure that the input power line is completely embedded;

[0009] The middle part of the upper layer is cast asphalt concrete, and the two sides are wear-resistant asphalt concrete; the transmitting coil of the magnetic resonance dynamic wireless charging system is embedded in the cast asphalt concrete, and the transmitting coil is connected to the input power line.

[0010] According to the above scheme, the width ratio of the poured asphalt concrete in the middle and the wear-resistant asphalt concrete on one side is 0.6-1:1.

[0011] According to the above scheme, the thickness of wear-resistant asphalt concrete is 3-5cm; the width of poured asphalt concrete is 75-125cm.

[0012] According to the above scheme, input power lines are laid every 10-20m on the surface of the middle surface layer perpendicular to the driving direction.

[0013] According to the above scheme, the pouring asphalt concrete adopts the pouring asphalt concrete grading, and the porosity is less than 1%. Preferably, the Luer fluidity is less than 20s. The coil embedding does not need compaction and self-leveling, and does not damage the coil structure and the road surface structure.

[0014] According to the above scheme, the wear-resistant asphalt concrete is one of basalt, diabase or steel slag asphalt concrete.

[0015] According to the above scheme, the asphalt of the poured asphalt concrete adopts high-viscoelastic modified asphalt, and the aggregate is one or more of basalt, diabase or steel slag.

[0016] According to the above scheme, the lower layer and the middle surface layer are constructed in accordance with the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0017] A road construction process adapted to the magnetic resonance dynamic wireless charging system is provided, comprising the following steps:

[0018] 1) After the lower and middle layers of the pavement are completed in normal construction, the input power line is laid on the surface of the middle layer, and then the synchronous crushed stone seal is spread to ensure that the power line is completely embedded;

[0019] 2) Then, on the basis of step 1), wear-resistant asphalt concrete is paved on both sides of the upper layer, compacted, and a groove is reserved between the wear-resistant asphalt concrete on both sides; high-viscosity elastic emulsified asphalt is spread at the bottom and both sides of the groove. After the curing is completed, a transmitting coil is arranged at the bottom of the groove and a power line is connected;

[0020] 3) Pour cast asphalt concrete into the groove of step 2) to ensure that the coil is completely embedded without compaction. Smooth the surface after self-flowing and make it the same height as the wear-resistant asphalt concrete on both sides. After placement, it can be opened to traffic to obtain a road surface suitable for the magnetic resonance dynamic wireless charging system.

[0021] According to the above scheme, in step 1), input power lines are laid every 10-20m.

[0022] According to the above scheme, in step 1), power supply and signal control integrated boxes are arranged every 100-200m along the road.

[0023] According to the above scheme, in step 1), the construction of the middle surface layer and the lower layer of the road surface is completed normally according to the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0024] According to the above scheme, in step 2), the thickness of the wear-resistant asphalt concrete on both sides after compaction is 3-5 cm.

[0025] According to the above scheme, in step 2), the groove width is 75-125 cm.

[0026] According to the above scheme, in step 2), the width ratio of the groove to the single-sided wear-resistant asphalt concrete is 0.6-1:1.

[0027] According to the above scheme, in step 2), the spreading amount of high-viscosity elastic emulsified asphalt is 0.5-1.0L / m 2 , the curing time is 3-5h.

[0028] According to the above scheme, in step 3), traffic can be opened after being left for 2-4 hours.

[0029] Provided is a magnetic resonance type dynamic wireless charging lane, comprising a magnetic resonance type dynamic wireless charging system and the above-mentioned road surface.

[0030] According to the above scheme, the magnetic resonance dynamic wireless charging system includes a plurality of magnetic resonance dynamic wireless charging units arranged in a row along the driving direction of the road surface, and used for magnetic resonance dynamic wireless charging of the vehicle during the driving process;

[0031] The magnetic resonance dynamic wireless charging unit includes a transmitting end, a receiving end and a control system; wherein:

[0032] The transmitting end includes an inverter, a primary compensation circuit network (LCC) and a transmitting coil; wherein the transmitting coil is embedded in the road surface cast asphalt concrete; the inverter and the primary compensation circuit network (LCC) are integrated into a power supply and signal control integrated box to convert the high-voltage direct current input from the power grid into a high-frequency square wave alternating current, which is input into the transmitting coil;

[0033] The receiving end is installed on the vehicle, and includes a receiving coil and a rectifier system. The receiving coil receives the high-frequency square wave AC from the transmitting coil through magnetic resonance, outputs high-frequency sine wave AC, and then passes through the rectifier system to form a stable DC power supply to charge the vehicle;

[0034] The control system includes a vehicle signal port, a position detection port, a transmitter signal port and a controller; the vehicle's driving position and speed are identified through position detection, the input of power from the power grid is intelligently controlled through the controller, and a signal is output to the vehicle signal port through the transmitter signal port to form intelligent control of dynamic wireless charging of the vehicle, thereby realizing efficient dynamic wireless charging of the vehicle during high-speed travel.

[0035] Preferably, the inverter and the primary compensation circuit network (LCC) are integrated into a power supply and signal control integrated box, wherein the inverter performs current inversion processing on the high-voltage direct current input from the power grid to form high-frequency alternating current, and forms high-frequency square wave alternating current after adjusting the resonant frequency and compensation through the primary compensation circuit network.

[0036] Preferably, the rectification system includes a secondary compensation circuit network, a rectification circuit and a DC / DC circuit; high-frequency sinusoidal AC power forms a resonant frequency and a compensation network through the secondary compensation circuit network, is converted into DC power through the DC / DC circuit, and forms stable DC power after noise reduction through the rectification circuit.

[0037] Preferably, the vehicle signal port is arranged on the new energy vehicle, the position detection is embedded between two adjacent transmitting coils, and the transmitting end signal port and the controller are integrated into a power supply and signal control integrated box.

[0038] Preferably, the vehicle is a new energy electric vehicle.

[0039] Preferably, the transmitting coil or receiving coil structure is one of rectangular, double rectangular, hexagonal or circular, and the coil is a Litz wire composed of multiple strands of enameled wire, and the diameter of the enameled wire is not greater than 0.2 mm.

[0040] Preferably, a power supply and signal control integrated box is arranged beside the road surface; more preferably, a power supply and signal control integrated box is arranged every 100-200m beside the road surface.

[0041] Provided is an application of the magnetic resonance dynamic wireless charging lane in dynamic wireless charging during high-speed vehicle driving, wherein the vehicle speed during high-speed driving is ≤120km / h.

[0042] According to the above scheme, the vehicle is a new energy electric vehicle.

[0043] According to the above scheme, the charging efficiency of dynamic wireless charging of the vehicle during driving is above 85%.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The present invention provides a pavement adapted to a magnetic resonance dynamic wireless charging system. The upper layer adopts a block design, and the wear-resistant asphalt concrete on both sides has excellent anti-skid and wear-resistant properties, which meets the needs of high-speed driving of vehicles and improves the driving comfort of the pavement; the middle part adopts self-leveling cast asphalt concrete, which does not damage the embedded transmitting coil and the pavement structure, effectively improves the compatibility of the transmitting coil and the road, and makes the surface layer and coil of the wireless charging pavement have excellent service performance. After long-term service, the damage rate of the coil and the pavement is greatly reduced.

[0046] 2. The present invention provides a construction method for a pavement adapted for a magnetic resonance dynamic wireless charging system, wherein a synchronous crushed stone seal is used on the surface of the middle surface layer to embed the input power line, and then wear-resistant asphalt concrete is laid on both sides of the upper layer, and grooves are reserved between the wear-resistant asphalt concrete on both sides, and high-viscoelastic emulsified asphalt is spread in the grooves to increase the adhesion of joints and interfaces, and then a transmitting coil is arranged at the bottom of the groove and connected to the power line, and finally poured asphalt concrete is poured in, which can be self-leveling without compaction, and protects the transmitting coil and power grid line. The high fluidity of the poured asphalt concrete allows the coil to be completely embedded, and the gap in the structure is less than 1%, which greatly reduces the impact of the transmitting coil on the pavement structure and improves the structural strength and service life of the wireless charging pavement; at the same time, the upper and lower layers and each part of the structure are fully bonded, the construction is simple, and the traffic is opened quickly, which has important industrial application value.

[0047] 3. The present invention provides a magnetic resonance dynamic wireless charging lane. Based on the magnetic resonance wireless charging technology, a magnetic resonance dynamic wireless charging road surface charging system is designed. With the specially designed road surface, efficient dynamic wireless charging of vehicles during high-speed driving is achieved, solving the problems of insufficient charging infrastructure and slow charging. At the same time, the control system realizes intelligent control of the dynamic wireless charging process, ensuring the stability of the wireless charging system during high-speed driving of the vehicle, thereby ensuring efficient energy conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Schematic diagram of the dynamic wireless charging pavement charging system according to an embodiment of the present invention.

[0049] Figure 2 Schematic diagram of the dynamic wireless charging principle of an embodiment of the present invention.

[0050] Figure 3 Schematic diagram of the dynamic wireless charging pavement control system according to an embodiment of the present invention.

[0051] Figure 4 The dynamic wireless charging pavement structure is composed of an embodiment of the present invention.

[0052] In the figure, 100 is a transmitting end, 101 is a transmitting coil, 102 is an input power line, 200 is a receiving end, 201 is a receiving coil, 300 is a control system, 400 is a wireless charging pavement, 401 is a synchronous gravel seal, 402 is a wear-resistant asphalt concrete, 403 is a poured asphalt concrete, and 500 is a power supply and signal control integrated box. DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments further illustrate the technical solution of the present invention, but are not intended to limit the protection scope of the present invention.

[0054] In an embodiment of the present invention, a road surface suitable for a magnetic resonance dynamic wireless charging system is provided, such as Figure 4 As shown, the road surface comprises a lower layer, a middle layer and an upper layer; wherein:

[0055] The surface of the middle surface layer is provided with an input power line 102 of a magnetic resonance dynamic wireless charging system, and then a synchronous gravel seal layer 401 is used to ensure that the input power line 102 is completely embedded;

[0056] The middle part of the upper layer is cast asphalt concrete 403 , and the two sides are wear-resistant asphalt concrete 402 ; the transmitting coil 101 of the magnetic resonance dynamic wireless charging system is embedded in the cast asphalt concrete 403 , and the transmitting coil 101 is connected to the input power line 102 .

[0057] In one of the preferred embodiments, the width ratio of the poured asphalt concrete in the middle to the wear-resistant asphalt concrete on one side is 0.6-1:1.

[0058] In a preferred embodiment, the thickness of the wear-resistant asphalt concrete is 3-5 cm; the width of the poured asphalt concrete is 75-125 cm.

[0059] In one of the preferred embodiments, input power lines are arranged on the surface of the middle surface layer perpendicular to the driving direction every 10-20 m.

[0060] In one preferred embodiment, the cast asphalt concrete adopts cast asphalt concrete grading, with porosity less than 1% and Luer fluidity less than 20s. The asphalt adopts high-viscoelastic modified asphalt, and the aggregate is one or more of basalt, diabase or steel slag.

[0061] In one of the preferred embodiments, the wear-resistant asphalt concrete is one of basalt, diabase or steel slag asphalt concrete.

[0062] An embodiment of the present invention further provides a magnetic resonance type dynamic wireless charging lane, comprising a magnetic resonance type dynamic wireless charging system and the above-mentioned road surface.

[0063] In one preferred embodiment, Figure 1-4 As shown, the magnetic resonance dynamic wireless charging system includes a plurality of magnetic resonance dynamic wireless charging units, which are arranged in a row along the driving direction of the road surface, and are used for magnetic resonance dynamic wireless charging of the vehicle while it is moving;

[0064] The magnetic resonance dynamic wireless charging unit includes a transmitting end 100, a receiving end 200 and a control system 300; wherein:

[0065] The transmitting end 100 includes an inverter, a primary compensation circuit network (LCC) and a transmitting coil 101; wherein the transmitting coil is embedded in the road surface pouring asphalt concrete; the inverter and the primary compensation circuit network (LCC) convert the high-voltage direct current input from the power grid into a high-frequency square wave alternating current, and input it into the transmitting coil;

[0066] The receiving end 200 is installed on the vehicle, and includes a receiving coil 201 and a rectifier system. The receiving coil 201 receives the high-frequency square wave AC from the transmitting coil through magnetic resonance, outputs high-frequency sine wave AC, and then passes through the rectifier system to form a stable DC power supply to charge the vehicle;

[0067] The control system 300 includes a vehicle signal port, a position detection port, a transmitter signal port and a controller; the vehicle's driving position and speed are identified through position detection, the input of grid power is intelligently controlled through the controller, and a signal is output to the vehicle signal port through the transmitter signal port to form intelligent control of the vehicle's dynamic wireless charging, thereby realizing efficient dynamic wireless charging of the vehicle during high-speed travel.

[0068] In a more preferred embodiment:

[0069] A power supply and signal control integrated box 500 is arranged beside the road surface; further more preferably, a power supply and signal control integrated box 500 is arranged every 100-200m beside the road surface.

[0070] The inverter and the primary compensation circuit network (LCC) are integrated into the power supply and signal control integrated box 500, wherein the inverter performs current inversion processing on the high-voltage direct current input from the power grid to form high-frequency alternating current, and forms high-frequency square wave alternating current after adjusting the resonant frequency and compensation through the primary compensation circuit network.

[0071] The rectification system includes a secondary compensation circuit network, a rectification circuit and a DC / DC circuit; high-frequency sinusoidal AC forms a resonant frequency and a compensation network through the secondary compensation circuit network, is converted into DC through the DC / DC circuit, and forms a stable DC after noise reduction through the rectification circuit.

[0072] The vehicle signal port is arranged on the new energy vehicle, the position detection is embedded between two adjacent transmitting coils, and the transmitting end signal port and the controller are integrated into a power supply and signal control integrated box.

[0073] The wireless charging principle of the magnetic resonance dynamic wireless charging lane in the embodiment of the present invention is as follows:

[0074] The position detection on the road identifies the driving position and speed of the new energy vehicle, intelligently controls the input of the high-voltage DC power supply of the power grid through the controller, and outputs the signal through the transmitter signal port to the vehicle signal port to form the magnetic resonance between the transmitter and the receiver, and start wireless charging. The wireless charging process is referenced Figure 2 The power supply of the power grid is input into the high-voltage DC power supply after rectification, and is inverted by the inverter to form a high-frequency AC power supply. The resonant frequency and compensation are adjusted through the primary compensation circuit network to form a high-frequency square wave AC power, which is input to the transmitting coil through the power line; the receiving coil receives the high-frequency square wave AC power of the transmitting coil through magnetic resonance, and outputs a high-frequency sinusoidal wave AC power. The resonant frequency and compensation are formed through the secondary compensation circuit network, and converted into DC power through the DC / DC circuit. Finally, after noise reduction by the rectifier circuit, a stable DC power supply is formed to charge the battery pack of the new energy vehicle.

[0075] The following is an embodiment of a specific pavement and its construction process:

[0076] The transmitting coil and receiving coil described in the embodiment are double rectangular structures, which are wound by 0.1×1500 strands of Litz wire with a diameter of 4.47mm in a plane spiral, and wound 15 times. The magnetic core is made of JF95 material and has a size of 400×600×2mm. 3 Wear-resistant asphalt concrete is basalt asphalt concrete; for cast asphalt concrete, the asphalt is high-viscoelastic modified asphalt, its dynamic viscosity is greater than 20,000 Pa·s, and the aggregate is basalt. The grading of cast asphalt concrete refers to JTG / T3364-02-2019, GA-13 is used, and the porosity is less than 1%; the Liuer fluidity of cast asphalt mixture is less than 20s.

[0077] Example 1

[0078] A road surface suitable for a magnetic resonance dynamic wireless charging system, the road surface is composed of a cast asphalt concrete with a transmitting coil embedded in the middle of the road surface and wear-resistant asphalt concrete on both sides. The road surface is used in highways with a lane width of 3.75m and a design speed of 100km / h.

[0079] The specific steps of the pavement construction process are:

[0080] (1) After the construction of the middle and lower layers of the road is completed normally in accordance with the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004), the input power line (diameter 5mm) is laid on the surface of the middle surface layer perpendicular to the driving direction every 15m, and a synchronous crushed stone seal layer (5-10mm) is spread to ensure that the power line is completely embedded.

[0081] (2) Wear-resistant asphalt concrete is then laid on both sides of the upper layer. The width of both sides is 125 cm and the thickness after compaction is 4 cm. A 125 cm wide groove is reserved in the middle of the wear-resistant asphalt concrete on both sides.

[0082] (3) After the wear-resistant asphalt concrete on both sides is paved, high-viscosity elastic emulsified asphalt is spread on the bottom and both sides of the middle groove reserved in step (2) at a spreading rate of 0.8L / m 2 , after curing for 4 hours, lay the transmitting coil at the bottom and connect the power cord.

[0083] (4) Pour asphalt concrete into the middle groove of step (3) to ensure that the coil is completely embedded. No compaction is required. After self-flowing and compaction (porosity <1%), smooth the surface and open to traffic after 3 hours to complete the construction of the dynamic wireless charging pavement.

[0084] The magnetic resonance dynamic wireless charging system configured on the road surface comprises a plurality of magnetic resonance dynamic wireless charging units arranged in a row along the driving direction of the road surface, and used for magnetic resonance dynamic wireless charging of the vehicle while it is moving; the magnetic resonance dynamic wireless charging unit comprises a transmitting end 100, a receiving end 200 and a control system 300; wherein:

[0085] A set of energy transmitting equipment at the transmitting end is composed of an inverter, a primary compensation circuit network (LCC), and a transmitting coil; the energy receiving equipment at the receiving end is composed of an energy receiving coil and a rectifier system. The rectifier system is composed of a secondary compensation circuit network, a rectifier circuit and a DC / DC circuit, and the receiving end is installed on a new energy vehicle; the control system is composed of a vehicle signal port, a road position detector, a transmitting end signal port and a controller. The control system realizes intelligent control of charging and ensures efficient energy conversion. A position detector is set between two adjacent transmitting coils, and a signal control and power rectifier integrated box is set every 200m along the road.

[0086] After the pavement construction was completed, the charging efficiency was tested by installing a new energy vehicle with a receiving end. At a speed of 100km / h, the charging efficiency was 85%. The sampling test results in the middle of the pavement showed that the road performance was excellent. The specific results are shown in Tables 1 and 2.

[0087] Example 2

[0088] A road surface suitable for a magnetic resonance dynamic wireless charging system, the road surface is composed of a cast asphalt concrete with a transmitting coil embedded in the middle of the road surface and wear-resistant asphalt concrete on both sides. The road surface is applied to urban dedicated roads, with a lane width of 3.5m and a design speed of 60km / h.

[0089] The specific steps of the pavement construction process are:

[0090] (1) After the construction of the middle and lower layers is completed normally in accordance with the Technical Specifications for Highway Asphalt Pavement Construction (JTG F40-2004), input power lines (diameter 5 mm) are laid every 15 m in the direction perpendicular to the driving direction, and a synchronous crushed stone seal layer (5-10 mm) is spread to ensure that the power lines are completely embedded.

[0091] (2) Wear-resistant asphalt concrete is laid on both sides of the upper layer. The width of both sides is 125 cm and the thickness after compaction is 4 cm. A 100 cm wide groove is reserved in the middle of the wear-resistant asphalt concrete on both sides.

[0092] (3) After the wear-resistant asphalt concrete is paved on both sides, high-viscosity elastic emulsified asphalt is spread on the bottom and both sides of the middle groove at a spreading rate of 0.7L / m 2 , after curing for 4 hours, lay the transmitting coil at the bottom and connect the power cord.

[0093] (4) Use poured asphalt concrete in the middle groove to ensure that the coil is completely embedded without compaction. After self-flowing and compaction (porosity <1%), smooth the surface and open to traffic after 3 hours to complete the construction of the dynamic wireless charging pavement.

[0094] The magnetic resonance dynamic wireless charging system configured on the road surface is the same as that in Example 1.

[0095] After the wireless charging pavement was completed, the charging efficiency was tested by using a new energy vehicle equipped with a receiving end. At a speed of 60km / h, the charging efficiency was 89%. The sampling test results in the middle of the pavement showed that the road performance was excellent. The specific results are shown in Tables 1 and 2.

[0096] Example 3

[0097] A road surface suitable for a magnetic resonance dynamic wireless charging system, the road surface is composed of a cast asphalt concrete with a transmitting coil embedded in the middle of the road surface and wear-resistant asphalt concrete on both sides. The road surface is applied to ordinary roads, with a lane width of 3m and a design speed of 40km / h.

[0098] The specific steps of the pavement construction process are:

[0099] (1) After the construction of the middle and lower layers of the road is completed normally in accordance with the Technical Specifications for Highway Asphalt Pavement Construction (JTG F40-2004), input power lines (diameter 5 mm) are laid every 15 m in the direction of driving, and a synchronous crushed stone seal layer (5-10 mm) is spread to ensure that the power lines are completely embedded.

[0100] (2) Wear-resistant asphalt concrete is laid on both sides of the upper layer. The width of both sides is 100 cm and the thickness after compaction is 4 cm. A 100 cm wide groove is reserved in the middle of the wear-resistant asphalt concrete on both sides.

[0101] (3) After the wear-resistant asphalt concrete is paved on both sides, high-viscosity elastic emulsified asphalt is spread on the bottom and both sides of the middle groove at a spreading rate of 0.6L / m 2 , after curing for 4 hours, lay the transmitting coil at the bottom and connect the power cord.

[0102] (4) Use poured asphalt concrete in the middle groove to ensure that the coil is completely embedded without compaction. After self-flowing and compaction (porosity <1%), smooth the surface and open to traffic after 3 hours to complete the construction of the dynamic wireless charging pavement.

[0103] The magnetic resonance dynamic wireless charging system configured on the road surface is the same as that in Example 1.

[0104] After the wireless charging pavement was completed, the charging efficiency was tested by using a new energy vehicle equipped with a receiving end. At a speed of 40km / h, the charging efficiency was 93%. The sampling test results in the middle of the pavement showed that the road performance was excellent. The specific results are shown in Tables 1 and 2.

[0105] Comparative Example 1

[0106] The road surface provided in this comparative example is applied to a highway, with a lane width of 3.75m and a design speed of 100km / h. The specific steps are the same as those in Example 1. The wireless charging system configured on the above road surface adopts an electromagnetic induction charging system, which is composed of a transmitter, a receiver and a control system. The difference from Example 1 is that there is no compensation circuit network (LCC) at the transmitter and the receiver.

[0107] After the wireless charging pavement was completed, the charging efficiency was tested by using a new energy vehicle equipped with a receiving end. At a speed of 100km / h, the charging efficiency was 42%. The pavement sampling test results showed that the road performance was excellent. The specific results are shown in Tables 1 and 2.

[0108] Comparative Example 2

[0109] The road surface provided in this comparative example is applied to a highway, with a lane width of 3.75m and a design speed of 100km / h. The specific steps are the same as those in Example 1, except that the wireless charging system configured in the road surface has no control system.

[0110] After the wireless charging pavement was completed, the charging efficiency was tested by using a new energy vehicle equipped with a receiving end. At a speed of 100km / h, the charging efficiency was 13%. The pavement sampling test results showed that the road performance was excellent. The specific results are shown in Tables 1 and 2.

[0111] Comparative Example 3

[0112] The pavement provided in this comparative example is applied to a highway, with a lane width of 3.75m and a design speed of 100km / h. The specific steps are the same as those in Example 1, except that the upper layer of the wireless charging pavement is made of wear-resistant asphalt concrete, which is compacted by rolling. The magnetic resonance dynamic wireless charging system configured on the above pavement is the same as that in Example 1.

[0113] After the wireless charging pavement was completed, the wireless charging system transmitting coil was damaged by more than 50%. The pavement sampling test results showed that the road performance was poor.

[0114] Comparative Example 4 (Ordinary pavement structure)

[0115] The pavement provided in this comparative example is applied to ordinary pavement, with a lane width of 3.5m and a design speed of 60km / h. The specific steps are the same as those in Example 2, except that the upper layer of the wireless charging pavement is constructed in accordance with the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004), and the interlayer treatment is conventional spreading of tack coat oil. The magnetic resonance dynamic wireless charging system configured on the above pavement is the same as that in Example 1.

[0116] After the road surface was completed, most of the wireless charging system transmitting coils were damaged.

[0117] The test results of wireless charging efficiency and service survival rate of the charging pavement of the above-mentioned embodiment and comparative example are shown in Table 1, and the test results of road performance are shown in Table 2.

[0118] Table 1. Test results of wireless charging efficiency and service survival rate of charging pavement in the embodiment and comparative example

[0119]

[0120]

[0121] Table 2. Road performance test results of charging pavement in the embodiment and comparative example

[0122]

[0123] It can be seen from Examples 1-3 that the dynamic wireless charging pavement of the present invention has a charging efficiency greater than 85% at the design speed, and as the road design speed decreases, the charging efficiency gradually increases, and all have excellent road performance.

[0124] By comparing Example 1 with Comparative Example 1, it can be seen that the charging efficiency of the conventional electromagnetic induction charging system is only 42%, which is reduced by more than half.

[0125] By comparing Example 1 with Comparative Example 2, it can be seen that without a control system, most of the electromagnetic energy will be wasted and the charging efficiency will be reduced by more than 70%.

[0126] By comparing Example 1 with Comparative Examples 3 and 4, it can be seen that the use of conventional construction technology will cause most of the transmitting coils in the road surface to be damaged and the road performance is poor.

[0127] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A road surface adapted for a magnetic resonance dynamic wireless charging system, the road surface comprising a lower layer, a middle layer and an upper layer, characterized in that: The surface of the middle surface layer is provided with an input power line of the magnetic resonance dynamic wireless charging system, and then a synchronous gravel seal is used to ensure that the input power line is completely embedded; The middle part of the upper layer is cast asphalt concrete, and the two sides are wear-resistant asphalt concrete; the transmitting coil of the magnetic resonance dynamic wireless charging system is embedded in the cast asphalt concrete, and the transmitting coil is connected to the input power line.

2. The road surface according to claim 1, characterized in that: The width ratio of the poured asphalt concrete in the middle to the wear-resistant asphalt concrete on one side is 0.6-1:

1.

3. The road surface according to claim 1, characterized in that: The cast asphalt concrete adopts the cast asphalt concrete grading, and the porosity is less than 1%; the wear-resistant asphalt concrete is one of basalt, diabase or steel slag asphalt concrete.

4. A road construction process adapted to a magnetic resonance dynamic wireless charging system according to any one of claims 1 to 3, characterized in that: The steps include: 1) After the lower and middle layers of the road surface are completed in normal construction, the input power line is laid on the surface of the middle layer, and then the synchronous crushed stone seal is spread to ensure that the input power line is completely embedded; 2) Then pave the wear-resistant asphalt concrete on both sides of the upper layer, compact it, and reserve a groove between the wear-resistant asphalt concrete on both sides; spread high-viscosity elastic emulsified asphalt at the bottom and both sides of the groove. After the maintenance is completed, lay a transmitting coil at the bottom of the groove and connect the input power line; 3) Pour asphalt concrete into the groove of step 2) to ensure that the transmitting coil is completely embedded without compaction. Smooth the surface after self-flowing and make it the same height as the wear-resistant asphalt concrete on both sides. After placement, it can be opened to traffic to obtain a road surface suitable for the magnetic resonance dynamic wireless charging system.

5. The construction process according to claim 4, characterized in that: In the step 1), the construction of the middle surface layer and the lower layer of the road surface is completed normally in accordance with the "Technical Specifications for Highway Asphalt Pavement Construction".

6. The construction process according to claim 4, characterized in that: In step 2), the spreading amount of high-viscosity elastic emulsified asphalt is 0.5-1.0L / m 2 The curing time is 3-5 hours; in the step 3), traffic can be opened after being placed for 2-4 hours.

7. A magnetic resonance dynamic wireless charging lane, characterized in that: It comprises a magnetic resonance dynamic wireless charging system and the road surface as described in any one of claims 1-3.

8. The lane according to claim 7, characterized in that: The magnetic resonance dynamic wireless charging system comprises a plurality of magnetic resonance dynamic wireless charging units arranged in a row along the driving direction of the road surface, and used for magnetic resonance dynamic wireless charging of the vehicle during the driving process; The magnetic resonance dynamic wireless charging unit includes a transmitting end, a receiving end and a control system; wherein: The transmitting end includes an inverter, a primary compensation circuit network and a transmitting coil; wherein the transmitting coil is embedded in the road surface pouring asphalt concrete; the inverter and the primary compensation circuit network convert the high-voltage direct current input from the power grid into high-frequency square wave alternating current, and input it into the transmitting coil; The receiving end is installed on the vehicle, and includes a receiving coil and a rectifier system. The receiving coil receives the high-frequency square wave AC from the transmitting coil through magnetic resonance, outputs high-frequency sine wave AC, and then passes through the rectifier system to form a stable DC power supply to charge the vehicle; The control system includes a vehicle signal port, a position detection port, a transmitter signal port and a controller; the vehicle's driving position and speed are identified through position detection, the input of grid power is intelligently controlled through the controller, and a signal is output to the vehicle signal port through the transmitter signal port to form intelligent control of dynamic wireless charging of the vehicle.

9. The lane according to claim 8, characterized in that A power supply and signal control integrated box is arranged beside the road surface; The inverter and the primary compensation circuit network are integrated into a power supply and signal control integrated box; wherein the inverter performs current inversion processing on the high-voltage direct current input from the power grid to form high-frequency alternating current, and forms high-frequency square wave alternating current after adjusting the resonant frequency and compensation through the primary compensation circuit network; The rectification system includes a secondary compensation circuit network, a rectification circuit and a DC / DC circuit; high-frequency sinusoidal AC forms a resonant frequency and a compensation network through the secondary compensation circuit network, is converted into DC through the DC / DC circuit, and forms a stable DC after noise reduction through the rectification circuit; The vehicle signal port is arranged on the new energy vehicle, the position detection is embedded between two adjacent transmitting coils, and the transmitting end signal port and the controller are integrated into the power supply and signal control integrated box.

10. An application of the magnetic resonance dynamic wireless charging lane of claim 7 in dynamic wireless charging during high-speed driving of a vehicle, characterized in that: When the vehicle is traveling at high speed, the speed is ≤120km / h.

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