CN114242414B - Wireless charging coil for two-wheeled electric vehicle - Google Patents
Wireless charging coil for two-wheeled electric vehicle Download PDFInfo
- Publication number
- CN114242414B CN114242414B CN202111591596.3A CN202111591596A CN114242414B CN 114242414 B CN114242414 B CN 114242414B CN 202111591596 A CN202111591596 A CN 202111591596A CN 114242414 B CN114242414 B CN 114242414B
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- wheeled electric
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000005094 computer simulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/303—Clamping coils, windings or parts thereof together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a wireless charging coil for a two-wheeled electric vehicle, which comprises a receiving coil and a transmitting coil, wherein the receiving coil and the transmitting coil both comprise hexagonal ferrite magnetic sheets, DD-type coils and two hexagonal coils, the DD-type coils are arranged between the two hexagonal coils, and the coils are connected in parallel. In the invention, firstly, compared with a round coil, the hexagonal coil has better ductility, the cost can be saved, the coverage area can be as large as possible, secondly, the added DD-type coil in the middle layer can enhance the anti-offset capability of the transmitting coil and the receiving coil, and finally, the two hexagonal coils and one DD-type coil are connected in parallel, so that higher transmission power can be provided, the two-wheeled electric vehicle can still stably transmit electric energy under the condition that the receiving coil and the transmitting coil have certain offset, and the three coils are connected in parallel, so that the charging efficiency of the two-wheeled electric vehicle is higher, the charging speed is faster, and the charging time is saved.
Description
Technical Field
The invention relates to the technical field of wireless charging of two-wheeled electric vehicles, in particular to a wireless charging coil for a two-wheeled electric vehicle.
Background
At present, two-wheeled electric motor car is the choice of a lot of families going on a close distance, but behind the convenience, because electric bicycle charges irregular and technical aspect's problem, lead to electric bicycle fire accident frequently, the life and property safety who gives people has caused great loss, bring social care to, traditional two-wheeled electric motor car adopts wired charging, frequent plug power plug can influence its life-span, also can lead to the plug to contact poorly, produce electric leakage or the phenomenon of striking sparks, and then cause the conflagration, compare in traditional wired charging mode, wireless charging operation is simpler, the course of working is safer, in wireless electric energy transmission system, coupling coil divide into transmitting, receiving coil two parts, they pass through magnetic field coupling and transmit the energy, present common wireless charging coil structure has circular and rectangle structure.
The prior publication number is as follows: in CN112277670a, the receiving coil is placed on the electric bicycle, the transmitting coil is placed on the ground, where the receiving coil and the transmitting coil are both single-layer round coils, in this invention, the transmitting coil and the receiving coil are always kept parallel, but the two coils cannot be guaranteed to be aligned completely in vertical height, when there is horizontal offset between the transmitting coil and the receiving coil, the coupling coefficient of the wireless charging coil will decrease, the leakage inductance increases, and further the transmission power decreases, and the structure of the single coil will cause the transmission efficiency to be low.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, a wireless charging coil for a two-wheeled electric vehicle is provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a wireless charging coil for two-wheeled electric motor car, includes receiving coil and transmitting coil, receiving coil and transmitting coil all include hexagon ferrite magnetic sheet, DD type coil and two hexagon coils, DD type coil sets up between two hexagon coils, and the coil is parallelly connected, DD type coil both sides limit and hexagon coil both sides limit coincide in the vertical direction, and DD type coil's lateral length d1 equals with the interval between two points of hexagon coil a, b, DD type coil's longitudinal length d2 equals with hexagon coil's unilateral length s, receiving coil sets up on two-wheeled electric motor car, transmitting coil sets up on the wireless charging system on ground, pass through magnetic field coupling between receiving coil and the transmitting coil to realize wireless charging system to the purpose of charging of two-wheeled electric motor car.
As a further description of the above technical solution:
The transmitting coil comprises a hexagonal ferrite magnetic sheet C1, a hexagonal coil L2, a DD coil L4 and a hexagonal coil L6, and the receiving coil comprises a hexagonal ferrite magnetic sheet C2, a hexagonal coil L1, a DD coil L3 and a hexagonal coil L5.
As a further description of the above technical solution:
The hexagonal coils L2, DD coil L4, L6, hexagonal coil L1, DD coil L3, L5 are arranged between the hexagonal ferrite magnetic sheet C1 and the hexagonal ferrite magnetic sheet C2.
As a further description of the above technical solution:
The hexagonal ferrite magnetic sheet C1 and the hexagonal coil L2, and the spacing between the hexagonal ferrite magnetic sheet C2 and the hexagonal coil L1 is at least 3mm.
As a further description of the above technical solution:
the intervals among the hexagonal coil L2, the hexagonal coil L6, the DD-shaped coil L4, the hexagonal coil L1, the hexagonal coil L5 and the DD-shaped coil L3 are at least 2mm.
As a further description of the above technical solution:
The number of turns of the hexagonal coil L2, the DD-shaped coil L4, the hexagonal coil L6, the hexagonal coil L1, the DD-shaped coil L3 and the hexagonal coil L5 is at least 15.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: firstly, the hexagonal coil is more ductile than the circular coil, the cost can be saved, the coverage area can be made as large as possible, secondly, the increased DD-type coil in the middle layer can enhance the anti-offset capability of the transmitting coil and the receiving coil, finally, the two hexagonal coils are connected in parallel with one DD-type coil, and can provide larger transmission power, so that the two-wheeled electric vehicle can still stably transmit electric energy under the condition that certain offset exists between the receiving coil and the transmitting coil, and the three coils are connected in parallel, the charging efficiency of the two-wheeled electric vehicle is higher, the charging speed is faster, and the charging time is saved.
Drawings
Fig. 1 shows a schematic structural diagram of a wireless charging coil for a two-wheeled electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a receiving coil of a wireless charging coil for a two-wheeled electric vehicle according to an embodiment of the present invention;
Fig. 3 is a schematic structural view of a transmitting coil of a wireless charging coil for a two-wheeled electric vehicle according to an embodiment of the present invention;
fig. 4 shows a schematic structural view of a single-coil wireless charging coil;
FIG. 5 shows a static and dynamic simulated test data line graph for a single coil wireless charging coil;
FIG. 6 shows a static and dynamic simulation test data line graph of a wireless charging coil for a two-wheeled electric vehicle provided in accordance with an embodiment of the present invention;
Fig. 7 shows a circuit topology diagram of a three-coil parallel structure of a wireless charging coil for a two-wheeled electric vehicle according to an embodiment of the present invention;
Fig. 8 shows a schematic top view of a DD coil for a wireless charging coil of a two-wheeled electric vehicle according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-8, the present invention provides a technical solution: the wireless charging coil for the two-wheeled electric vehicle comprises a receiving coil and a transmitting coil, wherein the receiving coil and the transmitting coil comprise hexagonal ferrite magnetic sheets, DD-shaped coils and two hexagonal coils, the DD-shaped coils are arranged between the two hexagonal coils, the coils are connected in parallel, the side edges of the two sides of the DD-shaped coils are overlapped with the side edges of the two sides of the hexagonal coils in the vertical direction, the distance between the transverse length d1 of the DD-shaped coils and the two points of the hexagonal coils is equal, the longitudinal length d2 of the DD-shaped coils is equal to the single-side length s of the hexagonal coils, the DD-shaped coils are rectangular coils embedded in the hexagonal coils, the receiving coils are arranged on the two-wheeled electric vehicle, the transmitting coil is arranged on a wireless charging system on the ground, and the receiving coils and the transmitting coils are coupled through magnetic fields to transmit energy so as to realize the charging purpose of the two-wheeled electric vehicle by the wireless charging system;
Firstly, the hexagonal coil is more ductile than the circular coil, the cost can be saved, the coverage area can be made as large as possible, secondly, the increased DD-type coil in the middle layer can enhance the anti-offset capability of the transmitting coil and the receiving coil, finally, the two hexagonal coils are connected in parallel with one DD-type coil, and can provide larger transmission power, so that the two-wheeled electric vehicle can still stably transmit electric energy under the condition that certain offset exists between the receiving coil and the transmitting coil, and the three coils are connected in parallel, the charging efficiency of the two-wheeled electric vehicle is higher, the charging speed is faster, and the charging time is saved.
When the positions of the receiving coil and the transmitting coil are opposite, namely, under the condition of the maximum coupling factor, static and dynamic simulation tests are carried out on the circular single-layer coil and the coil of the invention, the transmitting coil and the receiving coil of the circular single-layer coil are respectively composed of the magnetic sheet C3, the coil L7, the magnetic sheet C4 and the coil L8, and test results are shown in fig. 5 and 6, and it can be seen that under the same static and dynamic conditions, the mutual inductance of the coil structure of the invention is larger, so that the transmission power of the coil is larger, and meanwhile, in the dynamic process, the anti-offset capability of the coil structure of the invention is stronger.
Referring to fig. 1 to 3, the transmitting coil includes a hexagonal ferrite sheet C1, a hexagonal coil L2, a DD coil L4 and a hexagonal coil L6, the DD coil L4 is disposed between the hexagonal coil L2 and the hexagonal coil L6, the receiving coil includes a hexagonal ferrite sheet C2, a hexagonal coil L1, a DD coil L3 and a hexagonal coil L5, the DD coil L3 is disposed between the hexagonal coil L1 and the hexagonal coil L5, and the hexagonal coil L2, the DD coil L4, the hexagonal coil L6 and the hexagonal coil L1, the DD coil L3, and the hexagonal coil L5 are disposed between the hexagonal ferrite sheet C1 and the hexagonal ferrite sheet C2.
Referring to fig. 1 to 3, the spacing between the hexagonal ferrite magnetic sheet C1 and the hexagonal coil L2, and between the hexagonal ferrite magnetic sheet C2 and the hexagonal coil L1 is at least 3mm, the spacing between the hexagonal coil L2, the hexagonal coil L6 and the DD coil L4, and between the hexagonal coil L1, the hexagonal coil L5 and the DD coil L3 is at least 2mm, and the number of turns of the hexagonal coil L2, the DD coil L4, the hexagonal coil L6, the hexagonal coil L1, the DD coil L3 and the hexagonal coil L5 is at least 15 turns.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The wireless charging coil for the two-wheeled electric vehicle is characterized by comprising a receiving coil and a transmitting coil, wherein the receiving coil and the transmitting coil comprise hexagonal ferrite magnetic sheets, DD-shaped coils and two hexagonal coils, the DD-shaped coils are arranged between the two hexagonal coils, the coils are connected in parallel, the side edges of the two sides of the DD-shaped coils are overlapped with the side edges of the two sides of the hexagonal coils in the vertical direction, the distance between the transverse length d1 of the DD-shaped coils and the distance between the two points of the hexagonal coils is equal, the longitudinal length d2 of the DD-shaped coils is equal to the unilateral length s of the hexagonal coils, the receiving coil is arranged on the two-wheeled electric vehicle, the transmitting coil is arranged on a wireless charging system on the ground, and energy is transmitted between the receiving coil and the transmitting coil through magnetic field coupling so as to realize the charging purpose of the two-wheeled electric vehicle by the wireless charging system;
The transmitting coil comprises a hexagonal ferrite magnetic sheet C1, a hexagonal coil L2, a DD-shaped coil L4 and a hexagonal coil L6, the DD-shaped coil L4 is arranged between the hexagonal coil L2 and the hexagonal coil L6, the receiving coil comprises a hexagonal ferrite magnetic sheet C2, a hexagonal coil L1, a DD-shaped coil L3 and a hexagonal coil L5, the DD-shaped coil L3 is arranged between the hexagonal coil L1 and the hexagonal coil L5, and the hexagonal coil L2, the DD-shaped coil L4, the hexagonal coil L6, the hexagonal coil L1, the DD-shaped coil L3 and the hexagonal coil L5 are arranged between the hexagonal ferrite magnetic sheet C1 and the hexagonal ferrite magnetic sheet C2;
The DD-type coil enables the two-wheeled electric vehicle to still transmit electric energy under the condition that a certain offset exists between the receiving coil and the transmitting coil.
2. The wireless charging coil for a two-wheeled electric vehicle according to claim 1, wherein the hexagonal ferrite sheet C1 and the hexagonal coil L2 and the space between the hexagonal ferrite sheet C2 and the hexagonal coil L1 is at least 3mm.
3. A wireless charging coil for a two-wheeled electric vehicle according to claim 2, wherein the hexagonal coil L2, the hexagonal coil L6 and the DD coil L4 are spaced apart by at least 2mm, and the hexagonal coil L1, the hexagonal coil L5 and the DD coil L3 are spaced apart by at least 2mm.
4. A wireless charging coil for a two-wheeled electric vehicle according to claim 3, wherein the number of turns of the hexagonal coil L2, DD coil L4, hexagonal coil L6, hexagonal coil L1, DD coil L3 and hexagonal coil L5 is at least 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591596.3A CN114242414B (en) | 2021-12-23 | 2021-12-23 | Wireless charging coil for two-wheeled electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591596.3A CN114242414B (en) | 2021-12-23 | 2021-12-23 | Wireless charging coil for two-wheeled electric vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN114242414A CN114242414A (en) | 2022-03-25 |
| CN114242414B true CN114242414B (en) | 2024-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111591596.3A Active CN114242414B (en) | 2021-12-23 | 2021-12-23 | Wireless charging coil for two-wheeled electric vehicle |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111756121A (en) * | 2020-07-07 | 2020-10-09 | 国网浙江省电力有限公司宁波供电公司 | High-power wireless power supply coupling mechanism and its parameter design method |
| CN111987811A (en) * | 2020-07-28 | 2020-11-24 | 东北林业大学 | Three-energy-transfer channel type wireless charging system based on orthogonal laminated magnetic coupling mechanism |
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| US10878995B2 (en) * | 2012-07-09 | 2020-12-29 | Auckland Uniservices Limited | Flux coupling device and magnetic structures therefor |
| US9496746B2 (en) * | 2013-05-15 | 2016-11-15 | The Regents Of The University Of Michigan | Wireless power transmission for battery charging |
| US10122192B2 (en) * | 2015-02-17 | 2018-11-06 | Qualcomm Incorporated | Sense coil geometries with improved sensitivity for metallic object detection in a predetermined space |
| CN206077030U (en) * | 2016-10-21 | 2017-04-05 | 成都经纬智联科技有限公司 | A kind of wireless charging device of electric bus |
| EP3924987A4 (en) * | 2019-02-15 | 2022-10-19 | Xnergy Autonomous Power Technologies Pte. Ltd. | Wireless power transfer based on magnetic induction |
| CN109741925B (en) * | 2019-02-27 | 2021-03-30 | 哈尔滨工业大学 | Receiving end with OQO coil group applied to mobile equipment dynamic wireless power supply system |
| CN110581609A (en) * | 2019-09-18 | 2019-12-17 | 武汉理工大学 | A magnetic coupling system for wireless power transmission of electric vehicles |
| CN112865327A (en) * | 2019-11-27 | 2021-05-28 | 哈尔滨工业大学 | Double-energy-transfer channel type high-power-density magnetic coupling mechanism based on overlapped coils |
| CN112092652A (en) * | 2020-09-11 | 2020-12-18 | 浙江大学 | Sectional type dynamic wireless charging magnetic coupling system of electric automobile |
| CN112277670A (en) * | 2020-11-12 | 2021-01-29 | 武汉理工大学 | Intelligent wireless charging device of electric bicycle |
| CN112564309B (en) * | 2020-11-30 | 2023-05-16 | 西安交通大学 | Compact wireless charging system based on multi-coil decoupling integration |
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2021
- 2021-12-23 CN CN202111591596.3A patent/CN114242414B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756121A (en) * | 2020-07-07 | 2020-10-09 | 国网浙江省电力有限公司宁波供电公司 | High-power wireless power supply coupling mechanism and its parameter design method |
| CN111987811A (en) * | 2020-07-28 | 2020-11-24 | 东北林业大学 | Three-energy-transfer channel type wireless charging system based on orthogonal laminated magnetic coupling mechanism |
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| CN114242414A (en) | 2022-03-25 |
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