CN115771412B - Electric vehicle wireless charging device and road surface structure with large transmission distance - Google Patents
Electric vehicle wireless charging device and road surface structure with large transmission distance Download PDFInfo
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- CN115771412B CN115771412B CN202211573725.0A CN202211573725A CN115771412B CN 115771412 B CN115771412 B CN 115771412B CN 202211573725 A CN202211573725 A CN 202211573725A CN 115771412 B CN115771412 B CN 115771412B
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 33
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
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- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 8
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 6
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
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- 239000010410 layer Substances 0.000 description 16
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- 239000002344 surface layer Substances 0.000 description 4
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- 238000004146 energy storage Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention relates to wireless charging equipment of an electric automobile with a large transmission distance and a pavement structure, wherein the wireless charging equipment comprises a primary side device and a secondary side device, the primary side device sequentially comprises a primary side coil, a primary side ferrite plate and a primary side aluminum plate from top to bottom, the secondary side device sequentially comprises a secondary side aluminum plate, a secondary side ferrite plate and a secondary side coil from top to bottom, the maximum transmission distance of the wireless charging equipment is 300mm, the coupling coefficient between the primary side coil and the secondary side coil is not lower than 0.1, the primary side device in the wireless charging equipment is embedded in the pavement structure, and the pavement structure sequentially comprises a pavement upper layer, a primary side device layer, a pavement lower layer, a pavement base layer and a pavement cushion layer from top to bottom. The invention can realize that the wireless primary coil and the secondary coil still have better coupling effect when the transmission distance is 300mm, thereby meeting the use requirement when being buried in a pavement structure and being widely applied to various vehicle types.
Description
Technical Field
The invention relates to the technical field of wireless charging and roads, in particular to an electric automobile wireless charging device with a large transmission distance and a road surface structure.
Background
The electric automobile uses a vehicle-mounted power supply as power, and drives wheels to run by using a motor, so that solar energy, wind energy and other clean renewable energy sources can be utilized, the problems of emission pollution and energy shortage of the motor vehicle are well solved, and the electric automobile is a strategically emerging industry in China. At present, the charging of an electric automobile depends on a wired charging pile and a charger, a wired charging mode often has a large potential safety hazard, electric leakage and electric shock accidents are easy to occur, and the limitation of the battery capacity of the electric automobile can also cause mileage anxiety of a user.
The wireless charging technology is a novel charging mode for realizing electric energy transmission by taking an electromagnetic field as a medium. The wireless charging mode is adopted to charge the electric automobile, the electric automobile does not contain an external leakage port, manual operation is not needed, the static state and the advancing state can be charged, and the electric automobile charging device has the advantages of safe operation, flexible scheme configuration, no mileage anxiety and the like compared with a wired charging mode.
The problem of adopting wireless charging technology in the road structure at present exists in that in order to protect wireless charging device and satisfy road surface roughness requirement, should embed wireless charging panel in the road structure, but this makes the transmission distance between wireless charging transmitting coil and the receiving coil increase, leads to electric automobile wireless charging efficiency to reduce, consequently, in order to shorten the distance between former limit coil and the vice limit coil, some research proposes to adopt protruding road surface, but this kind of protruding road surface not only influences driving travelling comfort, has more made the potential safety hazard. In addition, as the primary coil is not considered to be buried in the road surface at present, the transmission distance of the coil used in the wireless charging research of most electric vehicles is less than 250mm at present, and furthermore, when the transmission distance of the conventional primary and secondary coils is increased to 300mm, the coupling effect between the coils is poor, and the use requirement cannot be met.
Disclosure of Invention
The invention aims to provide the wireless charging equipment for the electric automobile and the pavement structure with large-distance transmission, which can realize that the wireless primary coil and the secondary coil still have better coupling effect when the maximum transmission distance reaches 300mm, further can meet the use requirement when buried in the pavement structure, and can be widely applied to various automobile types.
The wireless charging equipment for the electric automobile with the large transmission distance comprises a primary side device and a secondary side device, wherein the primary side device sequentially comprises a primary side coil, a primary side ferrite plate and a primary side aluminum plate from top to bottom, the secondary side device sequentially comprises a secondary side aluminum plate, a secondary side ferrite plate and a secondary side coil from top to bottom, the maximum transmission distance of the wireless charging equipment is 300mm, and the coupling coefficient between the primary side coil and the secondary side coil is not lower than 0.1.
Further, the primary side device is arranged inside the pavement structure, and the secondary side device is arranged at the lower end of the automobile and is smaller than the chassis of the automobile.
Further, litz wires are used for winding the primary coil and the secondary coil, and the wire diameter is 5mm.
Further, in the primary side device, the primary side coil is 650mm in outer diameter length and width, 500mm in inner diameter length and width, 290mm and 140mm in inner diameter length and width, 8 turns of the coil, double-wire parallel winding is used, the turn spacing is 6.66mm, the periphery is chamfered by 45 degrees, the primary side ferrite plate is manganese-zinc ferrite, the relative magnetic conductivity is 3300, the primary side ferrite plate is 650mm in length, 500mm in width and 5mm in thickness, no air gap exists between the primary side ferrite plate and the primary side coil, the primary side aluminum plate is 750mm in length, 600mm in width and 3mm in thickness, and the distance between the upper surface of the primary side aluminum plate and the lower surface of the primary side ferrite plate is 30mm.
In the secondary side device, the secondary side coil adopts a square structure with chamfer angles, the size is that the outer diameter is 480mm, the inner diameter is 210mm, the number of turns is 9 turns, the turn spacing is 11.25mm, the periphery is chamfered by 45 degrees, the secondary side ferrite plate is square, manganese-zinc ferrite is selected and used, the relative magnetic conductivity is 3300, the size is that the side length is 500mm, the thickness is 5mm, the secondary side ferrite plate is directly placed on the secondary side coil, no air gap exists between the secondary side ferrite plate and the secondary side coil, the size is that the side length is 520mm, the thickness is 8mm, the secondary side aluminum plate is directly placed on the secondary side ferrite plate, and no air gap exists between the secondary side ferrite plate and the secondary side ferrite plate.
Furthermore, the primary side device is packaged by resin to play a role in waterproof effect, and then is packaged by cement concrete to play a role in bearing traffic load, the packaging thickness of the resin is at least 5mm, the packaging thickness of the cement concrete is at least 30mm, and the resin is epoxy resin or polyurethane.
Further, the secondary side device is encapsulated with a plastic housing.
The utility model provides a wireless pavement structure that charges, pavement structure embedded have the former limit device in the wireless charging equipment, pavement structure from the top down is road surface top layer in proper order, former limit device layer, road surface below layer, road base layer and road bed course.
The wireless charging primary device layer is arranged at the center line of each lane, embedded in the pavement lower surface layer, sequentially arranged adjacently along the length direction of the lane and connected with the power grid line, and when being arranged, the prefabricated cement concrete is firstly placed in the ditch, and then the pavement lower surface layer material is poured to lay the pavement structure.
Furthermore, the pavement upper surface layer, the pavement lower surface layer and the pavement cushion layer are made of conventional pavement materials, and the roadbed layer is made of a soil-stone roadbed subjected to waterproof treatment.
The invention has the beneficial effects that:
1. through the structure of transformation primary side coil and vice limit coil, overcome electromagnetic coupling structure transmission distance limited problem, effectively reduce the electric energy loss, improve charging efficiency.
2. Meanwhile, the rectangular coil structure with the chamfer is arranged inside the pavement, compared with the round coil, the rectangular coil structure with the chamfer is arranged in the pavement structure, a uniform magnetic field is formed in space, and the stability of energy transmission in the dynamic running process of the electric automobile is ensured.
3. The wireless charging pavement structure provided by the invention has the advantages that the wireless charging equipment is buried underground, on one hand, the flatness of a road is not influenced, the normal passing of vehicles is ensured, and on the other hand, the pavement structure bears traffic load and environmental loads such as rainwater, sun drying and the like, so that the wireless charging equipment is not damaged, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 (a) is a front view of a wireless charging primary side apparatus of the present invention;
FIG. 1 (b) is a side view of a wireless charging primary side device of the present invention;
FIG. 1 (c) is a top view of a wireless charging primary side apparatus of the present invention;
FIG. 1 (d) is an elevation view of a wireless charging primary side apparatus of the present invention;
FIG. 2 (a) is a front view of a wireless charging secondary device of the present invention;
FIG. 2 (b) is a side view of a wireless charging secondary device of the present invention;
FIG. 2 (c) is a top view of a wireless charging secondary device of the present invention;
FIG. 2 (d) is an elevation view of a wireless charging secondary side device of the present invention;
FIG. 3 is a schematic cross-sectional view of a pavement structure of an embedded wireless charging device of the present invention;
fig. 4 is a longitudinal section schematic view of a pavement structure embedded in a wireless charging device according to the present invention;
FIG. 5 is a fragmentary schematic view of a wireless charging highway traffic lane according to the present invention;
fig. 6 is a schematic view of an automobile according to the present invention traveling on a wireless charging road.
Reference numerals illustrate:
1-primary aluminum plate, 2-primary ferrite plate, 3-primary coil, 4-secondary aluminum plate, 5-secondary ferrite plate, 6-secondary coil, 7-primary device, 8-secondary device, 9-road surface upper layer, 10-road surface lower layer, 11-road surface base layer, 12-road surface cushion layer and 13-power supply grid.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1 and 2, the wireless charging equipment of the electric automobile with a large transmission distance comprises a primary side device 7 and a secondary side device 8, and the coupling coefficient of the device provided by the invention is 0.011 when the transmission distance is 300mm by using an LCR tester, so that the use requirement is met. The power supply grid 13 is utilized to input 65V high-frequency alternating-current voltage for the primary side device 7, the load of the electric automobile is 10Ω, the power received by the electric automobile after magnetic field transmission is tested to be 3.23kW, the transmission efficiency is 86.54%, and the standard requirement is met.
The primary side device 7 sequentially comprises a primary side coil 3, a primary side ferrite plate 2 and a primary side aluminum plate 1 from top to bottom, the secondary side device sequentially comprises a secondary side aluminum plate 4, a secondary side ferrite plate 5 and a secondary side coil 6 from top to bottom, the maximum transmission distance of the wireless charging equipment is 300mm, and the coupling coefficient between the primary side coil 3 and the secondary side coil 6 is not lower than 0.1.
The primary side device 7 is arranged inside the pavement structure, and the secondary side device 8 is arranged at the lower end of the automobile and is smaller than the chassis of the automobile.
Litz wire is used for winding the primary coil 3 and the secondary coil 6, and the wire diameter is 5mm.
The primary side coil 3 has the dimensions of 650mm and 500mm in outer diameter length and width, 290mm and 140mm in inner diameter length and width, 8 turns, double-wire parallel winding, 6.66mm in turn spacing and 45-degree chamfering around, the primary side ferrite plate 2 is made of manganese-zinc ferrite, the relative magnetic conductivity is 3300, the primary side coil 3 is 650mm long, 500mm wide and 5mm thick, no air gap exists between the primary side coil 3 and the primary side coil 3, the primary side aluminum plate 1 is 750mm long, 600mm wide and 3mm thick, and the distance between the upper surface of the primary side aluminum plate and the lower surface of the primary side ferrite plate 2 is 30mm.
In the secondary side device 8, the secondary side coil 6 adopts a square structure with chamfer angles, the size is that the outer diameter is 480mm, the inner diameter is 210mm, the number of turns is 9 turns, the turn spacing is 11.25mm, the periphery is chamfered by 45 degrees, the secondary side ferrite plate 5 is made of manganese-zinc ferrite, the relative permeability is 3300, the size is that the side length is 500mm, the thickness is 5mm, the secondary side ferrite plate is directly placed on the secondary side coil 6, no air gap exists between the secondary side ferrite plate and the secondary side coil 6, the side length of the secondary side aluminum plate 5 is 520mm, the thickness is 8mm, the secondary side ferrite plate 5 is directly placed on the secondary side ferrite plate, and no air gap exists between the secondary side ferrite plate 5.
The primary side device 7 is packaged by resin to play a waterproof effect, then is packaged by cement concrete to play a role in bearing traffic load, the packaging thickness of the resin is at least 5mm, the packaging thickness of the cement concrete is at least 30mm, and the resin is epoxy resin or polyurethane.
The secondary side device 8 is encapsulated using a plastic housing.
Example 2
As shown in fig. 3 and 4, a wireless charging highway comprises a pavement system and a wireless charging system, wherein the pavement system comprises a pavement upper layer 9, a wireless charging primary side device 7, a pavement lower layer 10, a pavement base layer 11 and a pavement cushion layer 12 from top to bottom. The wireless charging primary side device is arranged in the middle of each lane and embedded in the pavement lower layer 10. The power supply grid 13 is arranged below the wireless charging primary side device 7.
The power supply grid 13 comprises a power supply source, and an energy storage power station and a grid switching device are arranged on the road side and are connected with the power supply grid to supply power.
When the electric vehicle runs on the road surface on which the primary side equipment 7 is laid, magnetic induction coupling occurs between the secondary side coil 6 and the primary side coil 3, so that electric energy is transmitted from the ground end to the vehicle end, and the electric vehicle is charged during running.
Example 3
When the invention is implemented, the situation that the transmission distance between the primary side device and the secondary side device is smaller than 300mm can be applied, and a communication module and an electric control module can be added on the secondary side device 8, so that a driver monitors the charging condition of the automobile through in-car equipment or a mobile phone and decides whether to continue to run on a wireless charging road surface.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211573725.0A CN115771412B (en) | 2022-12-08 | 2022-12-08 | Electric vehicle wireless charging device and road surface structure with large transmission distance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211573725.0A CN115771412B (en) | 2022-12-08 | 2022-12-08 | Electric vehicle wireless charging device and road surface structure with large transmission distance |
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| Publication Number | Publication Date |
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| CN115771412A CN115771412A (en) | 2023-03-10 |
| CN115771412B true CN115771412B (en) | 2025-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211573725.0A Active CN115771412B (en) | 2022-12-08 | 2022-12-08 | Electric vehicle wireless charging device and road surface structure with large transmission distance |
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| CN118407301A (en) * | 2024-06-28 | 2024-07-30 | 百世通(浙江)安全科技有限公司 | Road structure with wireless charging, anti-icing and road surface health monitoring functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641274A (en) * | 2020-06-09 | 2020-09-08 | 许继集团有限公司 | Coupling mechanism applied to wireless power transmission system of electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102016221732B4 (en) * | 2016-11-07 | 2023-10-19 | Vitesco Technologies GmbH | Method for guiding a motor vehicle into a charging position at an inductive charging station as well as control device and motor vehicle |
| CN207558597U (en) * | 2017-11-15 | 2018-06-29 | 无锡华润矽科微电子有限公司 | It is used to implement the Wireless charging coil of Best Coupling coefficient |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111641274A (en) * | 2020-06-09 | 2020-09-08 | 许继集团有限公司 | Coupling mechanism applied to wireless power transmission system of electric automobile |
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