Wireless power transmission transmitter system in asphalt pavement and construction / repair method thereof

Abstract

Provided are a wireless power transmission transmitter system and a construction method of an asphalt pavement including the same. The present disclosure allows future repair of asphalt pavements. The construction method comprises the following steps: forming a channel in a layer of a travelable building structure; forming a magnetisable asphalt mixture in the channel, wherein the magnetisable asphalt mixture comprises an asphalt bonding substance and magnetisable particles; and placing the prefabricated transmitter coil or the prefabricated transmitter coil assembly in the magnetisable asphalt mixture. The prefabricated transmitter coil assembly includes a transmitter coil and a bracket that may be permanently mounted in the road surface or non-permanently mounted in the road surface, a portion of the transmitter coil is mounted in the bracket, and 0% to 90% of the transmitter coil is embedded in the magnetisable bituminous mixture.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to wireless charging technology, and more particularly, to a wireless power transfer transmitter system and a method for constructing a wireless power transfer transmitter system in an asphalt road surface. The wireless power transfer transmitter system and the construction method can be used for static charging or dynamic charging. Background Art

[0002] One version of an electric road includes a transmitter coil installed in an asphalt road, which generates a magnetic field to charge a vehicle equipped with a receiver passing on the road. Another version of the electric road is to charge a vehicle equipped with a receiver parked on the road or in a parking lot. The magnetic field generated by the transmitter coil is used to wirelessly transmit power. Summary of the Invention

[0003] Embodiments of the present disclosure provide a wireless power transfer transmitter system and a method for constructing an asphalt road surface including the wireless power transfer transmitter system.

[0004] According to one aspect, a method for constructing an asphalt road surface including a wireless power transfer transmitter system is provided. The method includes: forming a channel in a layer of a drivable building structure; forming a magnetizable asphalt mixture in the channel, wherein the magnetizable asphalt mixture includes an asphalt binder and particles, and some or all of the particles are magnetizable; wherein the percentage of the particles in the magnetizable asphalt mixture is less than or equal to one hundred percent; and placing a prefabricated transmitter coil or a prefabricated transmitter coil assembly in the magnetizable asphalt mixture, wherein the prefabricated transmitter coil assembly includes a transmitter coil and a bracket, a part of the transmitter coil is installed in the bracket, and 0% to 90% of the transmitter coil is embedded in the magnetizable asphalt mixture.

[0005] According to another aspect, a wireless power transfer transmitter system is provided, including:

[0006] A channel formed in a layer of a drivable building structure;

[0007] A magnetizable asphalt mixture formed in the channel, wherein the magnetizable asphalt mixture includes an asphalt binder and particles, and some or all of the particles are magnetizable; wherein the percentage of the particles in the magnetizable asphalt mixture is less than or equal to one hundred percent; and

[0008] A prefabricated transmitter coil or a prefabricated transmitter coil assembly formed in a magnetizable asphalt mixture, wherein the prefabricated transmitter coil assembly includes a transmitter coil and a bracket, a part of the transmitter coil is installed in the bracket, and 0% to 90% of the transmitter coil is embedded in the magnetizable asphalt mixture. Description of the Drawings

[0009] The drawings are incorporated herein and form a part of the specification, showing embodiments of the present disclosure, and are further used, together with the specification, to explain the principles of the present disclosure and enable those skilled in the relevant art to practice and use the present disclosure.

[0010] Figure 1 Shows the position of a wireless power transmission transmitter system according to an embodiment of the present disclosure in a completed drivable building structure.

[0011] Figure 2A Shows a cross-section of the bracket and the transmitter coil embedded in the bracket according to an embodiment of the present disclosure.

[0012] Figure 2B Shows a longitudinal sectional view of the transmitter coil and the bracket.

[0013] Figure 2C Shows a plan view of the transmitter coil and the bracket as viewed from the bottom of the bracket.

[0014] Figure 3 Is a schematic diagram showing a channel for placing the magnetizable asphalt mixture.

[0015] Figure 4 Is a flowchart of a construction method of a wireless power transmission transmitter system according to an embodiment of the present disclosure.

[0016] Figure 5A Shows an example of two narrow strips formed of asphalt mixture.

[0017] Figure 5B Shows along Figure 5A The cross-sectional view taken along A-A' in

[0018] Figure 5C Shows an example of the compaction and cutting of two narrow strips.

[0019] Figures 6A to 6C Schematically shows a protective cap attached to the bottom side of the bracket according to an embodiment of the present disclosure.

[0020] Figure 7 Schematically shows the position of a wireless power transmission transmitter system according to an embodiment of the present disclosure.

[0021] Figure 8Schematically shows the position of a wireless power transfer transmitter system for static charging according to another embodiment of the present disclosure.

[0022] Figure 9 Schematically shows a passive cooling scheme according to an embodiment of the present disclosure.

[0023] Figure 10 Schematically shows an active cooling scheme according to an embodiment of the present disclosure.

[0024] Figure 11 Schematically shows a cross-sectional view of a wireless power transfer transmitter system according to an embodiment of the present disclosure.

[0025] Figure 12 Schematically shows an example position of a hole for the connection between the transmitter coil and the cable.

[0026] Figure 13A and Figure 13B Shows the placement of a prefabricated coil assembly by a vibration and spraying mechanism for on-site construction according to an embodiment of the present disclosure.

[0027] Figure 14 Shows a rolling press with an inverse design of a coil according to an embodiment of the present disclosure, which can be used to generate an imprint of the coil.

[0028] Figure 15 Is a schematic diagram showing a cross-section of a lane of a typical new asphalt road surface embedded with a wireless power transfer transmitter system.

[0029] Figure 16 Is a schematic diagram showing a cross-section of an asphalt road surface repaired by removing a layer and replacing it with a new layer containing an embedded wireless power transfer transmitter system.

[0030] Figure 17 Is a schematic diagram showing a cross-section of a concrete road surface repaired by adding one or more asphalt layers containing an embedded wireless power transfer transmitter system. Detailed Description

[0031] Although specific configurations and arrangements have been discussed, it should be understood that this is done for illustrative purposes only. Those skilled in the relevant art will recognize that other configurations and arrangements can be used without departing from the spirit and scope of the present disclosure. It will be obvious to those skilled in the relevant art that the present disclosure can also be used in various other applications.

[0032] Note that when the specification mentions "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", "certain embodiments", etc., it indicates that the described embodiments may include specific features, structures, or characteristics, but each embodiment does not necessarily include such specific features, structures, or characteristics. In addition, such terms do not necessarily refer to the same embodiment. Further, when a specific feature, structure, or characteristic is described in connection with an embodiment, whether or not explicitly described, implementing such a feature, structure, or characteristic in connection with other embodiments is within the knowledge of those skilled in the relevant art.

[0033] In general, terms can be understood at least in part based on their usage in context. For example, the term "one or more" as used herein depends at least in part on the context and can be used to describe any feature, structure, or characteristic in a singular sense or can be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, terms such as "a" or "an" or "the" can also be understood to express a singular usage or a plural usage, at least in part depending on the context. Additionally, the term "based on" can be understood to not necessarily be intended to express an exclusive set of factors, but also, at least in part depending on the context, to allow for additional factors that may not be explicitly described.

[0034] Before introducing the technologies provided by the embodiments of the present disclosure, some terms used herein are first described.

[0035] Asphalt binder - A black cementitious material, usually from the residue of crude oil refining, used to bind aggregate particles together. In Europe, this material is called "bitumen".

[0036] Asphalt mixture - In the general sense, this is a mixture of crushed stone pieces (aggregate particles) of different sizes, which are combined to produce a mixture of aggregate particles coated with asphalt binder. During construction, the aggregate particles are coated with asphalt binder, and the mixture is compacted on the road to produce an asphalt mixture as part of the road surface structure.

[0037] Static charging is the process of transferring electrical power to the battery while the vehicle is stationary.

[0038] Dynamic charging is the process of transferring electrical power to the battery or the electric motor while the vehicle is moving.

[0039] The embodiments of the present disclosure are described below.

[0040] To achieve wireless charging by installing a transmitter coil on a road, magnetizable asphalt mixture can be formed in the road. The magnetizable asphalt mixture is an asphalt mixture that uses magnetizable particles of different sizes (e.g., ferrite particles) to replace all or part of the natural aggregate particles usually used in road asphalt mixture. The magnetizable asphalt mixture can be formed in the road in an in-situ construction manner or on-site construction manner to become an integral part of the road. A prefabricated transmitter coil or a prefabricated transmitter coil assembly can be formed in the magnetizable asphalt mixture. Thus, when current flows in the transmitter coil of the transmitter coil or the prefabricated transmitter coil assembly, a magnetic field can be generated, and this magnetic field serves as a medium for power transmission. By means of this magnetic field, a current is induced in a secondary coil (also called a receiver coil), and this secondary coil can be arranged on the bottom side of the vehicle. Thus, the vehicle can be charged.

[0041] Figure 1 Shows the position of a wireless power transmission transmitter system according to an embodiment of the present disclosure in a built drivable building structure. Figures 2A to 2C Shows the structure of a prefabricated transmitter coil assembly according to an embodiment of the present disclosure. Figure 3 Is a schematic diagram showing a channel for placing magnetizable asphalt mixture.

[0042] Refer to Figure 1 and Figure 3 , the wireless power transmission transmitter system may include a channel 101, a magnetizable asphalt mixture 102, and a prefabricated transmitter coil assembly 103.

[0043] The channel 101 is formed in a layer of the drivable building structure, for example, the second or third layer starting from the surface of the drivable building structure. The drivable building structure can be a road or the ground inside or outside a building, or other types of roads. For example, if the vehicle is a forklift or other vehicle mainly working indoors (e.g., a warehouse), the wireless power transmission transmitter system can be embedded in the ground or attached to the surface of the ground of the building.

[0044] The magnetizable asphalt mixture 102 is formed in the channel 101. The magnetizable asphalt mixture 102 includes an asphalt binder material and particles, and part or all of the particles are magnetizable. The magnetizable particles in the magnetizable asphalt mixture 102 can be ferrite particles. The percentage of magnetizable particles in the magnetizable asphalt mixture 102 can be less than or equal to one hundred percent. For example, the magnetizable asphalt mixture 102 can have a high volume fraction of ferrite particles to provide power transmission to a vehicle when parked or during movement. For example, the volume fraction of ferrite particles in the total mixture volume of the magnetizable asphalt mixture 102 can be not less than 35% and can be as high as 90%. For example, the volume fraction can be from 70% to 85%. A larger volume fraction results in a higher initial magnetic permeability. The higher the initial magnetic permeability selected, the more stray fields can be avoided and the lower the magnetic losses. Lower magnetic losses can make the slab thinner and cheaper. In other words, the magnetizable asphalt mixture 102 can be considered a magnetizable core containing ferrite particles bonded together with an asphalt binder.

[0045] Ferrite is an artificial ceramic material. The primary products come in various sizes and shapes. For example, the largest chunks can reach 20 centimeters. Generally, the average size of ferrite chunks can be 3 to 5 centimeters. Similar to crushed stones, the ferrite chunks can be reduced to smaller sizes using crushing processes. The crushed ferrite chunks are divided into various sizes so that the chunks of each size can be proportionally recombined together to obtain a desired gradation. The resulting magnetizable asphalt mixture includes ferrite particles and an asphalt binder material. For example, the asphalt binder material can be at least one of an asphalt binder, an epoxy resin, silicon, or an alternative binder composed of natural materials or synthetic amorphous materials.

[0046] The prefabricated transmitter coil assembly 103 is formed in the magnetizable asphalt mixture 102. As Figure 2A and Figure 2B shown, the prefabricated transmitter coil assembly 103 includes a transmitter coil 1031 and may also include a bracket 1032. A part of the transmitter coil 1031 is mounted in the bracket 1032, while another part of the transmitter coil 1031 is embedded in the magnetizable asphalt mixture 102. That is, the transmitter coil 1031 is mounted in the bracket 1032 with a desired exposure (usually between 0% and 90% of the diameter of the transmitter coil 1031).

[0047] The top of the prefabricated transmitter coil assembly can be located approximately 10 to 12 centimeters below the surface of the finished road surface. For example, an asphalt road surface can have two layers placed on top of the base course mixture. In the case where the transmitter coil assembly is placed within the base course, there will be two layers of conventional asphalt mixture on the transmitter coil assembly. In this document, the two layers of conventional asphalt mixture are collectively referred to as the surface layer 105. The surface layer 105 covers the prefabricated transmitter coil assembly 103 and the asphalt mixture 106 of the drivable construction structure surrounding the magnetizable asphalt mixture 102. The thickness of the surface layer can be approximately 10 centimeters, but should be thick enough to allow future repair of the road surface by milling or other typical repair methods to remove part of the surface and replace it with a new layer. Future repairs allow for the removal of deteriorated material at the surface of the road surface and replacement with similar new material. The transmitter coil installed in the road surface is expected to have a longer lifespan than that of the asphalt road surface (generally 10 to 15 years).

[0048] In another embodiment, a bracket 1032 can be used during the installation of the transmitter coil 1031, and the bracket 1032 is removed after the transmitter coil 1031 is bonded to the magnetizable asphalt mixture at an appropriate depth or a desired depth. Alternatively, in yet another embodiment, the transmitter coil can be installed into the magnetizable asphalt mixture without a bracket.

[0049] In both cases, the wireless power transfer transmitter system can include a channel, a magnetizable asphalt mixture, and a prefabricated transmitter coil. That is to say, the wireless power transfer transmitter system can not include a bracket.

[0050] Figure 4 is a flowchart of a construction method of a wireless power transfer transmitter system according to an embodiment of the present disclosure. The method can include the following steps:

[0051] In step 201, a channel 101 is formed in a layer of the drivable construction structure. The channel can be a long continuous structure in which one or more prefabricated transmitter assemblies or one or more prefabricated transmitter coils can be installed. Such a long channel will be most suitable for dynamic charging situations. Alternatively, the channel can be relatively short and can accommodate the installation of one or more prefabricated transmitter assemblies or one or more prefabricated transmitter coils. Such a short channel will be most suitable for static charging situations in a parking lot.

[0052] In step 202, a magnetizable asphalt mixture 102 is formed in the channel 101.

[0053] In step 203, the (one or more) prefabricated transmitter coil assemblies 103 or the (one or more) prefabricated transmitter coils are placed in the magnetizable asphalt mixture 102.

[0054] The above method is applicable to the in-situ or on-site construction of a wireless power transmission transmitter system. Using this method, the wireless power transmission transmitter system is formed in-situ within a drivable building structure and becomes an integral part of the completed drivable building structure.

[0055] In the above method, the prefabricated transmitter coil assembly 103 includes a transmitter coil 1031 and may also include a bracket 1032. The prefabricated transmitter coil assembly 103 is placed on the magnetizable asphalt mixture 102, where the transmitter coil 1031 faces downward and contacts the newly placed magnetizable asphalt mixture 102, while the bracket 1032 faces the surface layer 105 to be formed that will cover the prefabricated transmitter coil assembly 103. The bracket 1032 can protect the transmitter coil 1031 from potential damage during subsequent processes such as compaction. Also, the bracket 1032 can enable bonding with the surface layer 105, thus avoiding separation or delamination between the layers of the drivable building structure.

[0056] Details on how to perform each step in the in-situ construction method are provided below.

[0057] Reference Figure 1 , two layers of conventional asphalt mixture (e.g., a 4-cm surface layer and a 6-cm intermediate layer) are placed above the transmitter coil assembly. As described above, the two layers of conventional asphalt mixture can be collectively referred to as the surface layer 105. The combined thickness of the layers above the transmitter coil assembly can be approximately 10 cm. Normal construction processes are used to construct the upper layer of these two asphalt mixtures (collectively referred to as 105) and the base layer 107 of the asphalt mixture (there may be other base mixtures below the base layer 107 of the asphalt mixture shown).

[0058] Select the vertical position of the wireless power transmission transmitter system within a drivable building structure (e.g., a pavement structure) to allow for future repair of the asphalt pavement by removing a portion of the material above the wireless power transmission transmitter system and replacing it with new asphalt mixture of the same thickness as the removed layer.

[0059] According to some embodiments, forming the channel may include forming a channel in the layer where the channel is to be formed using a milling machine.

[0060] As Figure 3As shown, after the construction of the base course 107 (for example, about 10 cm lower than the final height), a milling machine (for example, a fine-tooth milling machine) is used to cut channels in the base course 107 to create recesses in which a wireless power transmission transmitter system will be constructed. The base course 107 is the upper base course, and the base course 107 can be considered as the layer for channel forming. The depth of the channels is selected to match the thickness of the magnetizable asphalt mixture plus the thickness of the bracket to which the transmitter coil is attached (in the case where the bracket remains in the road surface), or the depth is selected to match the thickness of the magnetizable asphalt mixture plus the thickness of the transmitter coil (in the case where the bracket is removed after installing the transmitter coil assembly or in the case where the transmitter coil is installed without a bracket), plus the thickness of the cable extending under the transmitter coil.

[0061] Using a milling machine to create the channels ensures that the thickness of the base asphalt mixture remaining at the bottom of the channels is evenly compacted (see the part circled by the letter S in Figure 3 . If the channels are created by placing asphalt mixture with reduced thickness (where the wireless power transmission transmitter system will be placed), the asphalt mixture under the transmitter assembly will not be fully compacted, and thus will be deteriorated by water (peeling of the asphalt binder coating from the aggregates) and freeze-thaw (disintegration of the asphalt mixture). Therefore, the material supporting the wireless power transmission transmitter system will deteriorate and cause premature failure of the wireless power transmission transmitter system itself.

[0062] According to some other embodiments, forming the channels may include laying two parallel strips of asphalt mixture on the layer below the layer in which the channels are formed to form the channels between the two parallel strips.

[0063] For example, as an alternative method, the channels for the wireless power transmission transmitter system can be formed by selecting the thickness of the base course to be equal to the thickness of the wireless power transmission transmitter system (magnetizable asphalt mixture plus transmitter coil assembly). In this case, the normal laying width of 3.6 m will be replaced by two narrow strips of asphalt mixture to leave the channels. Figure 5A An example of two narrow strips of asphalt mixture is shown. Figure 5B Shown along Figure 5A in the cross-sectional view taken along A-A' in Figure 5A and Figure 5B . As shown in

[0064] , two parallel strips 108 of asphalt mixture (the asphalt mixture can be conventional asphalt mixture, rather than magnetizable asphalt mixture) are laid on the layer 109, and the layer 109 is below the layer in which the channels are formed (layer 107).

[0064] This method may require a smaller nominal maximum size of asphalt mixture for this layer. Special considerations must be made to ensure satisfactory long-term performance of the asphalt mixture near the transmitter coil assembly.

[0065] In typical asphalt mixture paving, special attention is usually required during compaction at unconfined edges to prevent premature deterioration of the asphalt mixture. At unconfined edges, the asphalt mixture is not constrained by adjacent materials (e.g., a paved asphalt mixture layer or a curb). Therefore, the outer edges of the asphalt mixture will tend to shift laterally, and a strip about 15 to 20 centimeters wide will have a higher void ratio than the inner part of the compacted asphalt mixture. These higher void ratios will accelerate the embrittlement of the asphalt binder, water intrusion, and freeze-thaw damage. In a normal asphalt pavement, this deterioration occurs at the lane edges away from traffic loads because unconfined edges only occur at the edges of the travel lanes.

[0066] Creating a slot in the center of the lane for a wireless power transfer transmitter system by laying two strips on both sides results in unconfined edges being formed on both sides of the wireless power transfer transmitter system, thus causing premature pavement failure at two locations.

[0067] To solve this problem, laying two parallel strips may include: laying two parallel strips, each having a first width; compacting the two parallel strips; and removing the edge portions of each of the two parallel strips so that each of the two parallel strips has a desired width, where the desired width (W2) is less than the first width.

[0068] That is, the laying width of each strip is wider than the desired width. For example, the laying width of each strip is about 15 to 20 centimeters wider than the required width. As Figure 5C shown, each of the two parallel strips is laid to have a first width W1. After compaction, the edge portions of each strip will have a higher void ratio than the inner part. Then, a strip of high-void ratio material is removed using a cutting wheel or a milling head. The strip after removing the high-void ratio material (i.e., the edge portion) can have a desired width W2 that is smaller than the first width W1.

[0069] According to some other embodiments, forming a slot may include: attaching a material at the location where the slot is to be formed, forming asphalt mixtures on both sides of the material, compacting the asphalt mixtures, and removing the material after compaction to leave a slot. The material for forming the slot can be compressible or incompressible.

[0070] For example, as another alternative, a suitable compressible material block (or in other words, void material), such as a foam board or other void-containing material, can be attached to the surface to be paved. This compressible material will be removed after paving, leaving a channel for the wireless power transmission transmitter system. The material should be sufficiently compressible to conform to the adjacent asphalt mixture when it is compacted by a compactor such as a roller. At the same time, the material will have sufficient rigidity to provide restraint and prevent lateral displacement of the adjacent asphalt mixture (which would result in a high void ratio).

[0071] A conventional asphalt mixture paver can spread hot asphalt mixture within the lane width. The screed of the paver rides on top of the mold. The compressible material adheres to the paving surface to prevent displacement (drag) under the paver. The hot asphalt mixture is placed on both sides of the mold. The roller compacts the mixture using a conventional rolling pattern, ignoring the presence of the compressible material.

[0072] In another alternative, the material placed at the location where the channel is to be formed can be incompressible. The incompressible material adheres to the paving surface to prevent displacement (drag) under the paver. In this case, the paver will place the hot asphalt mixture thicker than the height of the incompressible material, so that the excess height allows for a reduction in thickness during the compaction process.

[0073] After paving, the compressible or incompressible material is removed, leaving a channel where the magnetizable asphalt mixture will be placed.

[0074] Once the channel is formed, the magnetizable asphalt mixture is placed in the prepared channel, as Figure 1 shown. The magnetizable asphalt mixture can have a typical thickness of 50 mm after compaction. The thickness of the magnetizable asphalt mixture placed in the channel is approximately 10% thicker than the final compacted thickness. In this case, it is 55 mm when placed and 50 mm after compaction. A special screed is used, which uses the surface height of the adjacent asphalt base mixture as a reference plane.

[0075] After the magnetizable asphalt mixture is placed in the channel, a prefabricated transmitter coil assembly including a transmitter coil and a bracket is placed in the magnetizable asphalt mixture. Figure 2A The bracket and the transverse cross-section of the transmitter coil embedded in the bracket are shown (taken along Figure 2C the K-K' line in Figure 2B ). The longitudinal cross-sectional view of the transmitter coil and the bracket is shown in Figure 2CShows a plan view of the transmitter coil and the support from the bottom of the support. The transmitter coil can be made of copper tubing or Litz wire, and the embodiments of the present disclosure do not impose specific limitations thereon. In the following description, the transmitter coil made of copper tubing is used as an example. The shape of the transmitter coil can be a double-D arrangement as shown in Figures 2A to 2C or can be another pattern specific to the transmitter arrangement.

[0076] As shown in Figure 2B , a portion of the transmitter coil 1031 is lifted above the support 1032, where the tubes of the transmitter coil 1031 need to cross each other. This lifted portion of the transmitter coil 1031 is called the bridge portion. The reference numeral 1033 indicates the position of the bridge portion, and the bridge portion can be covered with a protective cap, and the discussion about the protective cap will be placed later. The bridge portion can be designed to be below the plane of the transmitter coil 1031 (as shown) or above it. As shown in Figure 2C , the position of the bridge portion is clearly where the tubes of the transmitter coil 1031 cross each other.

[0077] The thickness of the support 1032 can be determined by the diameter of the copper tubing plus the thickness of the electrical insulation layer outside the tube and the desired thickness of the laminated asphalt felt above the tube.

[0078] For example, if the diameter of the tube is 25 mm and the thickness of the electrical insulation layer is 2.5 mm, the recess in the support (the recess is for mounting the transmitter coil) will be 15 mm, that is, half of the outer diameter of the insulated transmitter coil. The distance from the support to the top of the bridge portion can be 15 mm plus 30 mm, for a total of 45 mm. For a specific case, this arrangement will allow the transmitter coil to embed 50% of its diameter into the magnetizable asphalt mixture. The desired embedment is between 0% and 90% of the transmitter coil diameter.

[0079] The support 1032 can be made of a material that will achieve bonding with the magnetizable asphalt mixture below the support and with the surface layer covering the prefabricated transmitter coil assembly when heated. As shown in Figure 1 , the support 1032 is used to protect the transmitter coil 1031 mounted in the support 1032 from potential damage during subsequent processes (such as compaction). Therefore, the material of the support 1032 can have appropriate stiffness to play a protective role. In addition, after placing the transmitter coil assembly, a surface layer is formed to cover the transmitter coil assembly, and the support 1032 needs to ensure the bonding between the support 1032 and the surface layer. The surface layer is generally formed by placing hot mix asphalt mixture, and when the hot mix asphalt mixture is placed on the support 1032, the material of the support 1032 can be heated to ensure the bonding between the surface layer and the support 1032.

[0080] For example, the support 1032 can be made of laminated asphalt-saturated felt layers. Each layer includes a substrate that has been impregnated with an asphalt binder. The properties of the asphalt binder are selected to ensure bonding occurs within the laminated asphalt-saturated felt layers and between the magnetizable asphalt beneath the support and the surface layer above the support. The support 1032 is made by laminating asphalt-saturated felt layers to provide the desired thickness. A recess having an appropriate depth and geometry is made in the laminated support 1032, and the transmitter coil 1031 is placed in the recess.

[0081] Alternatively, the support 1032 can be made of other materials (such as lignin, plastic, or epoxy resin, etc.) or multiple layers formed of other materials, and can be bonded with an amorphous adhesive, as long as such materials and adhesives can achieve the protection and bonding functions.

[0082] The support 1032 extends beyond the dimensions of the transmitter coil 1031, as Figures 2A to 2C shown. Generally, the support 1032 can be about 5 centimeters wider than the transmitter coil 1031. For dynamic charging, the length of the support 1032 can depend on the distance along the road length between the transmitter coils. Generally, the spacing between the transmitter coils is 30 to 60 centimeters, and the support should ideally be continuous, in which case the support 1032 can be up to 30 to 60 centimeters longer than the transmitter coil 1031 installed in the support 1032. For static charging, the support 1032 only needs to be 10 centimeters longer than the coil 1031.

[0083] As described above, in another embodiment, a coil support may be used during the installation of the transmitter coil, and after the transmitter coil is bonded to the magnetizable asphalt mixture to an appropriate depth, the support is removed. In this embodiment, the role of the support is to ensure the geometric stability of the transmitter coil during coil installation, and the coil support can be removed after the coil installation. Alternatively, in yet another embodiment, the transmitter coil may be installed in the magnetizable asphalt without a coil support. That is, a support may not be used during the installation of the transmitter coil. In both of these embodiments, the transmitter coil can be protected from the layer being constructed above it. A protective mixture may be placed on top of the transmitter coil. For example, the protective mixture is a micro-surfacing or a sand mixture. The micro-surfacing or the sand mixture may be placed on top of the transmitter coil and used to fill the space between the transmitter coils. The micro-surfacing is an asphalt mixture including small aggregate particles (generally with a maximum size less than 5 mm) mixed with an emulsified asphalt binder. The sand mixture is a hot mix asphalt mixture containing small aggregate particles (generally less than 5 mm) mixed with an asphalt binder. Such a mixture or other similar materials protect the transmitter coil from deformation and protect the insulating material on the transmitter coil from the larger aggregates in the surface mixture, which may pierce or partially pierce the insulating material on the transmitter coil.

[0084] In a parking lot where transmitters are installed to provide static charging for parked vehicles, channels for placing prefabricated transmitter coil assemblies or prefabricated transmitter coils can be constructed, as Figure 8 shown. The channels can be constructed by a fine tooth planer deep into the base course. The length of the channel can be selected to accommodate one or more transmitter coil assemblies or one or more transmitter coils. Each parking space can include a separate channel. The channel can also be formed by laying parallel strips of asphalt mixture to form a channel between the two parallel strips, or as an alternative method, appropriate compressible material blocks can be attached before laying and removed after laying to leave a space for the transmitter coil assembly or the transmitter coil, as described above. Specifically, a compressible or incompressible material is attached at the location where the channel is to be formed, asphalt mixture is formed around the compressible or incompressible material, the asphalt mixture is compacted, and the compressible or incompressible material is removed after compaction to form the channel.

[0085] In Figure 8 this, the cable for the transmitter coil can extend along the front end of the parking space in the parking lot and enter the parking space to connect to the transmitter coil.

[0086] For static charging, the power transfer occurs for a long enough time to generate excessive heat in the (one or more) transmitter coil assemblies or (one or more) transmitter coils. Therefore, heat dissipation may be required to reduce the temperature of the (one or more) coil assemblies / (one or more) transmitter coils and the surrounding asphalt mixture. Depending on the geographical location where the transmitter is installed and the properties of the paving material commonly used at that location, it is desirable to prevent the temperature of the magnetizable asphalt mixture (and possibly the surface layer) from rising above the normal maximum pavement surface temperature at that location. As a reference, the range of the maximum pavement surface temperature can be from 50°C in a cool climate to 75°C in a hot desert climate. The heat generated by the (one or more) transmitter coil assemblies or (one or more) transmitter coils will depend on the rated power of the (one or more) coil assemblies or (one or more) transmitter coils, the length of the operating time, and other design considerations.

[0087] Heat dissipation can be either active or passive. Passive heat dissipation can be achieved using one or more heat pipes that utilize the temperature difference between the magnetizable asphalt mixture and the soil surrounding or beneath the coil assembly or coil. The heat pipe can include a container tube lined with a wick filled with a liquid that evaporates and condenses according to the temperature difference. For a specific embodiment of a coil assembly or coil with passive cooling, one or more heat pipes 301 are installed as Figure 9 shown. The heat pipes 301 can be embedded in the magnetizable asphalt mixture 102 and driven into the surrounding ground at an angle. The angle is the angle between the extending direction of the heat pipe and the plane of the bottom surface of the groove (as shown by the letter G in Figure 9 ). For example, the heat pipe can be installed vertically in the ground beneath the coil assembly or coil, as shown in Figure 9 (i.e., the angle is 90 degrees), or can be installed horizontally (i.e., the angle is 0 degrees).

[0088] Alternatively, when using the tubes of the transmitter coil for heat transfer and wireless power transfer, active heat dissipation can be achieved. Active cooling can be achieved by circulating a heat transfer fluid. A specific embodiment of active cooling can utilize the advantage that the coil is made of a hollow tube to generate a closed-loop cooling system within the transmitter coil by pumping the fluid through the coil, as shown in Figure 10 . The liquid can be water or a specific solution of other suitable liquids. As shown by the two arrows in Figure 10 , the heat transfer fluid can be pumped into and out of the heat transfer coil. As shown by the two black squares in Figure 10 , the transmitter coil is connected to a power source. In an embodiment, the transmitter coil has a dual purpose: a) generating a high-frequency magnetic field to wirelessly transfer power to a receiver on a stationary or moving vehicle; and b) circulating a cooling fluid to reduce the temperature of the transmitter coil.

[0089] Figure 6A Schematically shows a protective cap attached to the bottom side of the bracket for protecting the bridge portion during the compaction process (the covered bridge portion is shown in Figure 2A , Figure 2B and Figure 2C ). Figure 6B The cross-sectional view of the protective cap is shown in Figure 6C The plan view of the protective cap as viewed from the bottom of the bracket is shown in . One or more protective caps 1034 can be arranged to protect the bridge portion. The protective cap 1034 can be formed of a non-metallic material capable of withstanding the installation temperature of the hot mix asphalt mixture (about 165 °C). The interior of the protective cap 1034 is filled with epoxy resin or other similar materials, which completely fill the gap between the protective cap and the bracket to prevent water intrusion after the transmitter coil is installed.

[0090] The prefabricated transmitter coil assembly is placed on top of the magnetizable asphalt mixture, where the transmitter coil faces down and contacts the newly placed magnetizable asphalt mixture. An asphalt compactor (e.g., a roller) on top of the transmitter coil assembly embeds the transmitter coil into the magnetizable asphalt mixture to a desired depth and compacts the magnetizable asphalt mixture.

[0091] When the bracket and the transmitter coil are pressed into the newly placed magnetizable asphalt mixture, the transmitter coil will be embedded into the magnetizable asphalt mixture to a desired depth, which is between 0% and 90% of the diameter of the transmitter coil. The thicknesses of the bracket and the magnetizable asphalt mixture are selected such that the installation is completed when the bracket is rolled to be flush with the top of the adjacent base course 107. This process ensures complete adhesion between the magnetizable asphalt mixture between the bracket and the transmitter coil.

[0092] In an alternative embodiment of removing the transmitter coil bracket, the gap left after removing the bracket can be filled with a protective mixture such as a microsurfacing mixture or a sand mixture. In another embodiment where the transmitter coil is placed in a pre-imprinted depression in the magnetizable asphalt mixture without using a bracket, the depth of the channel is selected such that a microsurfacing mixture or a sand mixture of an appropriate thickness can be placed to protect the transmitter coil and be flush with the top of the channel.

[0093] Figure 7 Shows the position of a wireless power transfer transmitter system for dynamic charging, in this case, the position is along the outer lane of a multi-lane highway. The power supply box powers a number of wireless power transfer transmitter systems upstream and downstream. Each wireless power transfer transmitter system can have at least one cable, e.g., two cables (or other number of cables). The position of the cable can be as shown by the circles in Figure 7 .

[0094] Figure 8 Shows the location of a wireless power transmitter system for static charging, in which case the location is in a parking lot. The power system can supply power to a number of transmitter pads, and each transmitter pad can have at least one cable, for example, two cables (or other numbers of cables).

[0095] Figure 11 Is a cross-sectional view of a wireless power transmission transmitter system, in which the location of the cable is shown. The wireless power transmission transmitter system can also include at least one cable 104. The transmitter coil 1031 is connected to at least one cable 104 so that the transmitter coil 1031 can receive power from at least one cable 104. At least one cable 104 can be connected to a power source (not shown). In this example, at least one cable 104 includes two cables.

[0096] The cable 104 can be placed at the bottom of the channel. When the channel is formed, a recess can be formed at the bottom of the channel along one side of the channel. For example, a milling machine can be used to cut the bottom of the channel deeper along one side of the channel to form a recess 1012 at the bottom of the channel, thereby providing space for the cable 104. The cables 104 can be bundled together to form a planar arrangement that is one cable high and multiple cables wide. Bundling the cables 104 together ensures that there are no void spaces between the cables where air or water could enter.

[0097] After the channel is formed, the cable 104 is installed at the bottom of the channel, and then a magnetizable asphalt mixture 102 is formed in the channel. That is, the cable is located below the magnetizable asphalt mixture 102. When the magnetizable asphalt mixture 102 is compacted, voids or spaces can be avoided from being formed between the cable 104 and the bottom surface of the channel, or between the cable 104 and the magnetizable asphalt mixture 102, thereby preventing air or water from entering.

[0098] Figure 12 Shows two adjacent wireless power transmission transmitter systems. Holes 1011 (for example, 15 cm in diameter) are cut at the edge of the channel. The connection points of the transmitter coils are located in the holes. At each connection point, a pair of cables move laterally into the 15-cm hole 1011. After the cables are placed, the magnetizable asphalt mixture is placed in the channel.

[0099] Two different processes can be considered for installing the transmitter coil assembly before placing the surface mixture: 1) using the transmitter coil assembly to compact the fresh magnetizable asphalt mixture, or 2) compacting the fresh asphalt mixture and imprinting it with the pattern of the transmitter coil and installing the transmitter coil in the pattern.

[0100] According to an embodiment, placing a prefabricated transmitter coil assembly in magnetizable asphalt mixture includes:

[0101] placing the prefabricated transmitter coil assembly on top of the newly formed magnetizable asphalt mixture; and

[0102] using a compactor (e.g., a conventional asphalt mixture compactor) to compact the prefabricated transmitter coil assembly and the magnetizable asphalt mixture.

[0103] Specifically, place the transmitter coil assembly on top of the fresh magnetizable asphalt mixture. Use a compactor (a compaction device for performing the compaction process, e.g., a roller) to place the bracket and the transmitter coil into the magnetizable asphalt mixture. At the same time, compact the magnetizable asphalt mixture to the desired density.

[0104] According to another embodiment, placing a prefabricated transmitter coil assembly in magnetizable asphalt mixture includes: placing a compactor on top of the newly formed magnetizable asphalt mixture to compact the magnetizable asphalt mixture, wherein the length and width of the compactor are the same as those of the bracket, a vibrator is attached to the top of the compactor, and the shape of the bottom surface of the compactor is formed to leave a transmitter coil pattern in the compacted magnetizable asphalt mixture, and the transmitter coil pattern is a mirror image pattern of the transmitter coil; removing the compactor; and placing the prefabricated transmitter coil assembly into the transmitter coil pattern left by the compactor.

[0105] The bottom surface of the compactor can be heated or can be coated with a release agent to prevent adhesion of the newly placed magnetizable asphalt mixture.

[0106] Remove the compaction device, thereby leaving a transmitter coil pattern imprinted into the magnetizable asphalt mixture; and place the prefabricated transmitter coil assembly into the pattern of the transmitter coil imprinted by the compactor.

[0107] Specifically, place the compactor on top of the fresh magnetizable asphalt mixture. The length and width of the compactor are the same as those of the bracket, as Figure 13A shown. A vibrator 401 is attached to the top of the compactor, and the vibrator 401 applies a vibration pressure with a selectively chosen frequency and amplitude to effectively compact the magnetizable asphalt mixture without causing damage to the ferrite particles. The shape of the bottom surface of the compactor is formed to leave a pattern in the compacted magnetizable asphalt mixture, and the pattern is a mirror image of the transmitter coil. The bottom surface can be heated and coated with a release agent to ensure that the magnetizable asphalt mixture does not adhere to the bottom of the compactor. After imprinting the pattern of the transmitter coil, place the bracket and the transmitter coil on the prepared surface, as Figure 13B shown.

[0108] In another embodiment, the compaction device for the magnetizable asphalt mixture can be a roller having a raised image (or embossed pattern) 601 (see Figure 14 ), which leaves an imprinted mark on the surface of the compacted magnetizable asphalt mixture, and the transmitter coil or transmitter coil assembly is placed in the imprinted mark. The roller can be self-driven or can be towed and operated using a vibration device operating at a selectively chosen frequency and amplitude.

[0109] According to some embodiments, the construction method and the wireless power transmission transmitter system provided above can be used for the construction of a new asphalt pavement. Figure 15 is a schematic cross-section view showing a lane of a typical new asphalt pavement with an embedded wireless power transmission transmitter system.

[0110] A typical asphalt pavement is constructed layer by layer in sequence on a prepared base course. The wireless power transmission transmitter system 10 is installed in the second or third layer from the surface (e.g., layer 107). One or more surface layers 105 and one or more lower layers 109 can be installed above and below the layer 107 in which the wireless power transmission transmitter system 10 is arranged. The thickness of the wireless power transmission transmitter system 10 can be the same as the thickness of layer 107 in which the wireless power transmission transmitter system 10 is installed, or the wireless power transmission transmitter system 10 can be thicker or thinner than layer 107. The width of the wireless power transmission transmitter system can be between 0.3 meters and 1.5 meters, and the length can be between 1.0 meter and 5.0 meters.

[0111] According to some other embodiments, the construction method and the wireless power transmission transmitter system provided above can be used in an existing asphalt pavement. Figure 16 is a schematic cross-section view showing a repaired asphalt pavement by removing a layer and replacing it with a new layer containing an embedded wireless power transmission transmitter system.

[0112] An asphalt pavement is usually repaired by adding one or more new asphalt layers on top of the existing pavement. One or more existing layers can be removed before placing the new layer.

[0113] If one or more existing surface layers of the pavement are removed by milling, or if no removal is performed, the layer containing the wireless power transmission transmitter system is placed on the milled surface or the existing surface. The construction technique for the layer containing the wireless power transmission transmitter system on top of the existing pavement is the same as the technique for a new asphalt pavement. As Figure 16 shown, a replacement layer 107 containing the wireless power transmission transmitter system 10 and one or more replacement surface layers 105 are formed on one or more lower layers 109 to replace the removed layers.

[0114] According to some other embodiments, the wireless power transfer system may be installed in new or existing road surfaces of a parking lot.

[0115] As discussed previously, a conventional asphalt mixture (layers 109 and 107) is installed in the new parking lot road surface.

[0116] In an existing parking lot road surface, only a portion of the existing surface needs to be removed. In Figure 8 , the existing surface layer may be removed transversely through the parking spaces (as shown by the dashed lines) where the transmitter system is to be installed. The width of the material to be removed is preferably selected based on the size of the transmitter to be installed. For example, for a 1.0-meter-long transmitter coil, the width of the material to be removed is 1.5 meters. For both new and existing road surfaces, a channel is formed in each parking space, for example, using a fine-tooth milling machine. The channel is located transversely at the center of the parking space and longitudinally where the receiver antenna of the vehicle is located. For a specific case, the channel may be 0.75 meters wide and 1.0 meter long. A magnetizable asphalt mixture is installed in the channel and compacted in a manner similar to that described previously using a compaction device as shown in Figure 13A and Figure 13B configured for the size and shape of the transmitter coil on the newly placed magnetizable asphalt mixture) or in a manner similar to that using a compactor as shown in Figure 14 having an embossing face for generating an embossing pattern (where the transmitter assembly is to be placed).

[0117] According to some other embodiments, the construction method and the wireless power transfer transmitter system provided above may be used in an existing rehabilitated concrete road surface having an asphalt overlay. Figure 17 is a schematic cross-section showing a concrete road surface rehabilitated by adding asphalt containing an embedded wireless power transfer transmitter system.

[0118] The concrete road surface may be rehabilitated by adding one or more asphalt layers on top of the existing road surface. The wireless power transfer transmitter system is installed in the second or third asphalt layer from the surface. The thickness of the wireless power transfer transmitter system may be the same as the thickness of the layer in which it is installed, or it may be thinner. The width of the wireless power transfer transmitter system is between 0.3 and 1.5 meters, and the length of the wireless power transfer transmitter system is between 1.0 and 5.0 meters. As shown in Figure 17 , an overlay layer 107 containing the wireless power transfer transmitter system 10 is formed on the existing concrete layer 110. One or more overlay surface layers 105 cover the layer 107.

[0119] In an embodiment of the present disclosure, on-site construction of a wireless power transmission transmitter system and a wireless power transmission transmitter system formed using such a construction method are provided. As described above, on-site construction involves multiple processes, and the wireless power transmission transmitter system is a heterogeneous material included within a pavement structure. How to prevent early deterioration of the pavement caused by the installation of the heterogeneous material within the pavement structure is an issue that needs to be considered and addressed.

[0120] In on-site construction, brackets can be used to protect the transmitter coil and achieve bonding with the surface layer and with the magnetizable asphalt mixture to ensure proper bonding between the prefabricated transmitter coil assembly and the surrounding layers or materials. Thus, early deterioration of the pavement can be avoided.

[0121] In addition, a cable is formed at the bottom of the channel, and then a magnetizable asphalt mixture is formed within the channel. Subsequently, compacting the magnetizable asphalt mixture can avoid the formation of voids or spaces between the cable and the bottom surface of the channel, or between the cable and the magnetizable asphalt mixture, thereby preventing air or water from entering. Further, holes are cut at the edges of the channel to enable the cable to move laterally to connect with the transmitter coil.

[0122] Additionally, the above-described method for forming the channel and placing the prefabricated transmitter coil assembly provides a practical construction solution. Thus, an inductive power transmitter for wireless power transmission can be realized, which uses an asphalt mixture with a high volume fraction of ferrite to provide power transmission to a vehicle while the vehicle is parked or during vehicle movement.

[0123] It should be noted that although some sizes or dimensions are marked in the drawings, these sizes or dimensions are merely illustrative and should not be construed as imposing any limitations on the present disclosure. In addition, the drawings are not necessarily drawn to scale, and for ease of description, some parts in the drawings may be shown in an enlarged manner.

[0124] The above description is only an exemplary embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and all such changes or substitutions should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be defined by the appended claims.

Claims

1. A construction method for an asphalt pavement, the asphalt pavement including a wireless power transmission transmitter system, the construction method comprising: Forming a channel in a layer of a drivable building structure; Forming a magnetizable asphalt mixture in the channel, wherein the magnetizable asphalt mixture includes an asphalt binder substance and particles, and some or all of the particles are magnetizable; wherein the percentage of particles in the magnetizable asphalt mixture is less than or equal to one hundred percent; and Placing a prefabricated transmitter coil or a prefabricated transmitter coil assembly in the magnetizable asphalt mixture, wherein the prefabricated transmitter coil assembly includes a transmitter coil and a bracket, a part of the transmitter coil is installed in the bracket, and 0% to 90% of the transmitter coil is embedded in the magnetizable asphalt mixture.

2. The method according to claim 1, wherein The magnetizable asphalt mixture and the prefabricated transmitter coil or the prefabricated transmitter coil assembly are used for dynamic charging to transmit power to a battery of at least one mobile vehicle or an electric motor of the at least one mobile vehicle; Wherein, forming the channel includes: Forming the channel in the layer by a milling machine; or Laying two parallel strips of asphalt mixture on a layer below the layer where the channel is to be formed to form the channel between the two parallel strips; or Attaching a compressible or incompressible material at a position where the channel is to be formed, forming asphalt mixture on both sides of the compressible or incompressible material, compacting the asphalt mixture, and removing the compressible or incompressible material after compaction to form the channel.

3. The method according to claim 2, wherein Laying the two parallel strips includes: Laying the two parallel strips each having a first width; Compacting the two parallel strips; and Removing edge portions of each of the two parallel strips so that each of the two parallel strips has a desired width, wherein the desired width is less than the first width.

4. The method according to claim 1, wherein The magnetizable asphalt mixture and the prefabricated transmitter coil or the prefabricated transmitter coil assembly are used for static charging to transmit power to a battery of at least one stationary vehicle; Wherein, forming the channel includes: Forming the channel in a parking space by a milling machine; or Laying parallel strips, or Attaching a compressible or incompressible material at a position where the channel is to be formed, forming asphalt mixture around the compressible or incompressible material, compacting the asphalt mixture, and removing the compressible or incompressible material after compaction to form the channel.

5. The method according to claim 1, wherein Placing the prefabricated transmitter coil assembly in the magnetizable asphalt mixture includes: Placing the prefabricated transmitter coil assembly on top of the newly formed magnetizable asphalt mixture; and Using a compactor to compact the prefabricated transmitter coil assembly and the magnetizable asphalt mixture; Enabling the bracket to be permanently installed, or removing the transmitter coil bracket.

6. The method according to claim 1, wherein, Placing the prefabricated transmitter coil or the prefabricated transmitter coil assembly in the magnetizable asphalt mixture includes: Place a compactor on top of the newly formed magnetizable asphalt mixture to compact the magnetizable asphalt mixture, wherein the length and width of the compactor are the same as those of the support, a vibrator is attached to the top of the compactor, and the shape of the bottom surface of the compactor is formed to leave a transmitter coil pattern in the compacted magnetizable asphalt mixture, and the transmitter coil pattern is a mirror image pattern of the transmitter coil; Wherein, when compacting the magnetizable asphalt mixture, the bottom surface of the compactor is heated and coated with a release agent; Remove the compactor; and Place the prefabricated transmitter coil or prefabricated transmitter coil assembly into the transmitter coil pattern left by the compactor; Permanently install the transmitter coil support or remove the transmitter coil support.

7. The method according to claim 1, wherein Placing the prefabricated transmitter coil or prefabricated transmitter coil assembly in the magnetizable asphalt mixture includes: Place a roller on top of the newly formed magnetizable asphalt mixture to compact the magnetizable asphalt mixture, wherein the roller has a raised image of the transmitter coil on the surface of the roller, and use the roller for compaction so that a transmitter coil pattern is left in the magnetizable asphalt mixture, and the transmitter coil pattern is a mirror image pattern of the transmitter coil; Remove the roller; and Place the prefabricated transmitter coil or prefabricated transmitter coil assembly into the transmitter coil pattern left by the roller; Permanently install the transmitter coil support or remove the transmitter coil support.

8. The method according to claim 1, wherein When forming the channel, form a recess at the bottom of the channel along one side of the channel; Wherein, after forming the channel, the method further includes: forming at least one cable in the recess; Wherein, after forming the at least one cable in the recess, form the magnetizable asphalt mixture in the channel.

9. The method according to claim 8, wherein When forming the channel, form holes at the edge of the channel; Wherein, the at least one cable extends into the holes, and the at least one cable is connected to the transmitter coil at the holes.

10. The method according to claim 1, wherein The support is made of a material that bonds with the surface layer covering the prefabricated transmitter coil assembly and with the magnetizable asphalt mixture when heated.

11. The method according to claim 10, wherein, The support is made of laminated asphalt-saturated felt layers, and each layer of the laminated asphalt-saturated felt layers includes a substrate impregnated with an asphalt binder; or Wherein, the support is made of a material or multiple material layers and is bonded using an asphalt binder or an amorphous adhesive.

12. The method according to claim 1, wherein, The method further includes: after the prefabricated transmitter coil assembly is formed in the magnetizable asphalt mixture and the transmitter coil in the prefabricated transmitter coil assembly is bonded to the magnetizable asphalt mixture at a desired depth, remove the support and form a protective mixture on top of the transmitter coil; or Wherein, placing the prefabricated transmitter coil in the magnetizable asphalt mixture includes: placing the prefabricated transmitter coil in the magnetizable asphalt mixture and forming the protective mixture on top of the prefabricated transmitter coil.

13. The method according to claim 1, wherein, The transmitter coil assembly is designed to be positioned sufficiently below the surface of the asphalt pavement to allow the asphalt pavement to be repaired by removing a portion of the surface and replacing the portion with a similar material.

14. A wireless power transmission transmitter system, comprising: A channel formed in a layer of a drivable building structure; A magnetizable asphalt mixture formed in the channel, wherein the magnetizable asphalt mixture includes an asphalt binder material and particles, and some or all of the particles are magnetizable; wherein the percentage of particles in the magnetizable asphalt mixture is less than or equal to one hundred percent; and A prefabricated transmitter coil or a prefabricated transmitter coil assembly formed in the magnetizable asphalt mixture, wherein the prefabricated transmitter coil assembly includes a transmitter coil and a bracket, a portion of the transmitter coil is mounted in the bracket, and 0% to 90% of the transmitter coil is embedded in the magnetizable asphalt mixture.

15. The wireless power transmission transmitter system according to claim 14, further comprising: At least one cable formed in a recess at the bottom of the channel.

16. The wireless power transmission transmitter system according to claim 15, wherein, Holes are formed at the edges of the channel, and the at least one cable extends into the holes to be connected to the transmitter coil.

17. The wireless power transmission transmitter system according to claim 14, wherein, The bracket is made of a material that achieves bonding with the surface layer covering the prefabricated transmitter coil assembly and with the magnetizable asphalt mixture when heated.

18. The wireless power transfer transmitter system according to claim 14, wherein, The bracket is removed after the transmitter coil is installed, and a protective mixture is placed on top of the transmitter coil.

19. The wireless power transfer transmitter system according to claim 14, wherein, The bracket extends beyond the size of the transmitter coil, the bridge portion of the transmitter coil is covered with a protective cap, the tubes or cables of the transmitter cross each other at the bridge portion, and the interior of the protective cap is filled with an epoxy resin or an amorphous material, and the epoxy resin or the amorphous material completely fills the gap between the protective cap and the bracket.

20. The wireless power transmission transmitter system according to claim 14, wherein, The wireless power transmission transmitter system further includes a cooling system, and the cooling system is a passive cooling system or an active cooling system; Wherein, the passive cooling system uses at least one heat pipe, the at least one heat pipe is embedded in the magnetizable asphalt mixture and is driven into the surrounding ground at an angle, the angle is the angle between the extending direction of the at least one heat pipe and the plane where the bottom surface of the channel is located, and the angle varies between 0 degrees and 90 degrees; or Wherein, the active cooling system uses a wireless power transmission transmitter coil made of a hollow tube to perform the following dual functions: generating a magnetic field to transmit power to a receiver, and circulating a coolant to reduce the temperature of the coil.

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