CN115284900B - Folding wireless electric energy receiving mechanism and wireless car that charges - Google Patents
Folding wireless electric energy receiving mechanism and wireless car that charges Download PDFInfo
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- CN115284900B CN115284900B CN202210861069.8A CN202210861069A CN115284900B CN 115284900 B CN115284900 B CN 115284900B CN 202210861069 A CN202210861069 A CN 202210861069A CN 115284900 B CN115284900 B CN 115284900B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 68
- 230000007306 turnover Effects 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
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- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
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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
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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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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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
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a folding wireless electric energy receiving mechanism which is characterized by comprising an energy receiving coil and a coil folding mechanism, wherein the energy receiving coil is designed to be a square coil, and in an uncharged state, the coil folding mechanism controls the energy receiving coil to be folded to be in a horizontal state; in a charging state, the coil turnover mechanism pushes the energy receiving coil to extend to be in a vertical state. In addition, the invention also provides a wireless charging automobile adopting the folding wireless power receiving mechanism. The effect is that: the folding wireless electric energy receiving mechanism replaces two commonly used parallel coil coupling mechanisms, is applicable to chassis heights of different vehicle types, improves the coupling coefficient to a great extent, can still work normally when the system is offset, has good anti-offset performance, and greatly increases the output power of the system.
Description
Technical Field
The invention relates to a wireless power transmission technology, in particular to a folding wireless power receiving mechanism and a wireless charging automobile.
Background
With the technical development of electric automobiles, great challenges are often faced in the popularization process, wherein the cruising is one of the pain points which are difficult to overcome. Because the vehicle-mounted battery has small capacity, the electric automobile needs to be charged on time, and the charging mode in the market at present is mainly divided into wired charging and wireless charging. The wired charging is a charging mode widely applied, but the traditional wired charging has a plurality of defects, such as direct contact, easy generation of electric spark, potential safety hazard, easy loss caused by frequent plugging operation, and the like. Faced with many drawbacks of wired charging, researchers have proposed wireless charging techniques. Compared with wired charging, wireless charging has the following advantages: ① The contact is not needed, and the safety is high; ② The occupied area is small, and the charging is convenient and intelligent, and the charging is performed immediately; ③ The influence of environmental factors is small, and the rain and snow weather can still work normally; ④ The manual maintenance cost is low.
Although the advantages of wireless charging are many, the wireless charging mode of the electric automobile is sensitive to the change of system parameters. The transmission distance changes caused by different heights of different automobile chassis, the system is deviated, the battery capacity changes in the charging process can influence the optimal working point of the system, and further the power, efficiency and the like of wireless charging are reduced. Therefore, a coupling mechanism which is suitable for the high chassis, good in anti-offset performance and high in power efficiency of system transmission needs to be studied.
Disclosure of Invention
In order to solve the problems of long wireless charging transmission distance, low efficiency and low power caused by high electric automobile chassis, the invention provides a folding wireless electric energy receiving mechanism which can reduce the transmission distance between a transmitting coil and a receiving coil and can increase the anti-offset capability.
In order to achieve the above purpose, the specific technical scheme adopted by the invention is as follows:
The folding wireless electric energy receiving mechanism is characterized by comprising an energy receiving coil and a coil folding mechanism, wherein the energy receiving coil is designed to be a square coil, and in an uncharged state, the coil folding mechanism controls the energy receiving coil to be folded to be in a horizontal state; in a charging state, the coil turnover mechanism pushes the energy receiving coil to extend to be in a vertical state.
Optionally, a current detection circuit is arranged on the energy receiving coil, the coil turnover mechanism detects whether the energy receiving coil enters a wireless charging area through the current detection circuit, and when the energy receiving coil enters the wireless charging area, the energy receiving coil is pushed to stretch to be in a vertical state through the coil turnover mechanism.
Optionally, the energy transmitting coils matched with the energy receiving coils are DD type transmitting coils, and the two D type coils are reversely connected in series on the same plane.
Optionally, in the coiling coil receiver of energy receiving coil, the afterbody of coil receiver is articulated with the vehicle chassis, when coil turns over a mechanism and promotes the energy receiving coil stretches into vertical state, the front portion of coil receiver is close to ground.
Optionally, in the coiling coil receiver of energy receiving coil, the front portion of coil receiver is articulated with the vehicle chassis, when coil turns over the mechanism and promotes the energy receiving coil stretches into vertical state, the afterbody of coil receiver is close to ground.
Optionally, two D-shaped coils of the energy transmitting coils are arranged side by side along a forward or backward direction of the electric vehicle.
Optionally, an angle measuring device is provided in the coil folding mechanism, and it is detected by the angle measuring device whether the energy receiving coil is folded to 90 °.
Based on the above description, the invention also provides a wireless charging automobile, which is characterized in that: including the folding wireless power receiving mechanism described above.
Optionally, when charging is required, a user sends a charging demand to the energy transmitting end and enters a wireless charging area in a forward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from back to front to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
Optionally, when charging is required, a user sends a charging demand to the energy transmitting end and enters a wireless charging area in a backward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from front to back to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
The invention has the following effects:
The folding wireless power receiving mechanism and the wireless charging automobile replace two commonly used parallel coil coupling mechanisms, are applicable to chassis heights of different automobile types, improve the coupling coefficient to a great extent, can still work normally when the system is offset, have good anti-offset performance, and greatly increase the output power of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic circuit diagram of a conventional LCC-S wireless power transfer system of the prior art;
Fig. 2 is a diagram showing a change of a charging state of a wireless charging car using the folding wireless power receiving mechanism according to the present invention;
FIG. 3 is a schematic diagram of a receiving coil in a horizontal state in COMSOL simulation software;
FIG. 4 is a schematic diagram of a receiving coil in a vertical state in COMSOL simulation software;
Fig. 5 is a magnetic field line distribution diagram of a receiving coil in a vertical state;
FIG. 6 is a graph of the mutual inductance change when the receiver coil is offset along the x-axis;
FIG. 7 is a graph of the mutual inductance change when the receiver coil is offset along the y-axis;
FIG. 8 is a diagram of a winding pattern of a transmitter coil;
fig. 9 is a winding mode diagram of the receiving coil;
fig. 10 is a charge control flow chart in an embodiment.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
As shown in fig. 1, this embodiment is illustrated by taking an LCC-S topology structure commonly used for static wireless charging of an electric vehicle as an example, where the topology has a characteristic of constant current and constant voltage on the primary side, that is, the secondary side voltage is independent of load and is only related to mutual inductance, compensation inductance and input power supply, and the secondary side voltage is reflective of mutual inductance under the condition that the compensation inductance and the input power supply are unchanged. In fig. 1, U dc represents a dc power supply, four driving signals V 1～V4 are used to drive a full-bridge inverter, an inductance Lp1, a capacitor C f and a capacitor C p form a primary LCC compensation network, L p is a transmitting coil, L s is a receiving coil, C s is a secondary compensation capacitor, the receiving coil and the secondary compensation capacitor form a series resonant network, a wireless energy signal is picked up, and then power is supplied to a load R L after passing through a rectifying and filtering circuit.
In a conventional LCC-S wireless power transmission system, an energy transmitting coil and an energy receiving coil are generally disposed opposite to each other, and when the system is applied to an electric vehicle, a certain transmission distance is provided between the energy receiving coil and the energy transmitting coil in order to ensure the trafficability of the vehicle, thereby affecting the energy transmission efficiency.
Therefore, the embodiment provides a folding wireless electric energy receiving mechanism, which comprises an energy receiving coil and a coil folding mechanism, wherein the energy receiving coil is designed to be a square coil, and in an uncharged state, the coil folding mechanism controls the energy receiving coil to be folded to be in a horizontal state; in a charging state, the coil turnover mechanism pushes the energy receiving coil to extend to be in a vertical state.
As can be seen from fig. 2, the energy transmitting coil 1 is generally buried on the ground, and the energy receiving coil 2 is disposed on the chassis of the electric vehicle, and in the uncharged state, the energy receiving coil 2 is in a horizontal state, and a certain distance is reserved between the energy receiving coil 2 and the ground, so that the normal traffic performance of the vehicle is not affected, and when charging is required, the energy receiving coil 2 is in a vertical state, so that the distance between the energy receiving coil and the energy transmitting coil is shortened, and the energy transmission efficiency is improved.
As can be seen in fig. 3,4 and 5, in the implementation, the energy transmitting coil matched with the energy receiving coil is a DD transmitting coil, and two D coils are connected in reverse series on the same plane. Taking the simulation effect of fig. 3 as an example, when the secondary square receiving coil is in an uncharged state, the secondary square receiving coil is folded on the automobile chassis, the distance between the primary side and the secondary side is 22.5cm (can be roughly regarded as the height of the automobile chassis), when the secondary square receiving coil is in a charged state, the secondary square receiving coil is turned over by 90 degrees and then is perpendicular to the automobile chassis, the center of the primary square receiving coil to the secondary square receiving coil is 12cm, and simulation analysis is performed on the coupling mechanism in the COMSOL to obtain a magnetic force line distribution diagram shown in fig. 5. It can be seen from the magnetic force line distribution diagram that after the magnetic core is added below the energy transmitting coil, a magnetic circuit with lower magnetic resistance is formed due to higher magnetic conductivity, so that the magnetic flux is effectively limited in a smaller range, and finally, the effect of reducing the magnetic leakage below the coupling mechanism is achieved. The magnetic flux in the y-axis direction (horizontal direction) of the DD-type transmitting coil is concentrated near the square receiving coil, so that compared with a common coupling mechanism with two parallel coils, the designed coupling mechanism formed by the DD-type transmitting coil matched with the vertical square receiving coil has higher magnetic flux utilization rate and better coupling degree between coils.
In addition, as shown in fig. 6, which shows the change diagram of the mutual inductance in the process that the secondary side deviates from the x-axis by + -10 cm, it can be seen that when the automobile deviates from the optimal charging point by + -10 cm, the mutual inductance is reduced by less than 1uH, so that the designed coupling mechanism can be judged to have good anti-deviation performance on the x-axis. As shown in FIG. 7, which is a graph of the change of mutual inductance in the process of y-axis deviation of + -10 cm of the secondary side, the designed coupling mechanism also has good anti-deviation performance when the y-axis deviation is carried out.
In specific implementation, the winding mode of the primary side DD energy transmitting coil can be shown by referring to FIG. 8, the adopted litz wire has the specification of 0.1mm 1650 strand, the outer diameter of 6.32mm and 15 turns, and the maximum bearable current of 66.9A can meet the design requirement. Wherein each coil is of a square structure of 21cm, and the winding direction is left anticlockwise and right clockwise. The length of the magnetic core paved by the transmitting coil can be selected to be 105% of the total length of the DD-type transmitting coil, the thickness is 0.5mm, and the width can be selected to be equal to or slightly larger than the coil. The litz wire specification of the square receiving coil of the secondary side is the same as that of the primary side, 12 turns are added, the winding mode is shown in figure 9, and the coil size is 21cm. The shielding aluminum plate can be arranged at the bottom of the electric automobile according to the requirement, the areas of the two aluminum plates can be equal to the DD coil, the aluminum plate interval is about 1cm, but the shielding aluminum plate and the energy receiving coil are independently and fixedly arranged, and the shielding aluminum plate cannot rotate along with the rotation of the energy receiving coil.
According to the parameter configuration, simulation shows that when the energy receiving coil and the energy transmitting coil are in positive phase, L p＝39.3μH,Ls =19.3 mu H and M=4.48 mu H, the output power of the system is about 13kW, the efficiency is 92%, and the requirement of high-power wireless charging of the electric automobile can be met.
When the coil folding mechanism pushes the energy receiving coil to extend to be in a vertical state, the front part of the coil storage box is close to the ground, and the mounting mode is suitable for vehicle back stop type charging.
In another implementation, in the coil storage box for winding the energy receiving coil, the front part of the coil storage box is hinged with the chassis of the automobile, and when the coil folding mechanism pushes the energy receiving coil to extend to be in a vertical state, the tail part of the coil storage box is close to the ground, so that the installation mode is suitable for the forward stop type charging of the automobile.
In either way, two D-shaped coils of the energy transmitting coils are arranged side by side along the forward or backward direction of the electric vehicle. When the energy receiving coil is in a vertical state, the energy receiving coil can be positioned right above the two D-shaped coil parting lines.
As can be seen from fig. 5, the energy transmitting coil and the energy receiving coil are defined in the above manner, when the electric vehicle advances or retreats, the energy receiving coil is gradually approaching the energy transmitting coil in a horizontal state, when the energy transmitting coil emits energy, a single D-type coil can still couple part of energy to the energy receiving coil, as the overlapping area of the energy receiving coil and the single D-type coil increases, the induction current of the energy receiving coil gradually increases, and when the energy receiving coil passes over the separation coil of the DD-type coil, the induction current of the energy receiving coil gradually decreases due to the opposite magnetic field direction of the D-type coil at the other side, so that whether the electric vehicle accurately enters the wireless charging area can be determined by detecting the change condition of the induction current of the energy receiving coil in the horizontal state.
Therefore, as an embodiment, a current detection circuit is provided on the energy receiving coil, the coil folding mechanism detects whether the energy receiving coil enters a wireless charging area through the current detection circuit, when the energy receiving coil enters the wireless charging area, the energy receiving coil is pushed to extend to be in a vertical state through the coil folding mechanism, an angle measuring instrument is provided in the coil folding mechanism, and whether the energy receiving coil is turned to 90 degrees is detected through the angle measuring instrument.
In addition, the embodiment also provides a wireless charging automobile, which comprises the folding wireless power receiving mechanism.
As an implementation mode, when the electric automobile needs to be charged, a user sends a charging demand to an energy transmitting end and enters a wireless charging area in a forward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from back to front to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
As another implementation mode, when the electric automobile needs to be charged, a user sends a charging demand to the energy transmitting end and enters a wireless charging area in a backward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from front to back to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
Of course, the charging control of the electric vehicle may be implemented according to the embodiment shown in fig. 10, and it can be seen that, in this control manner, the charging process is mainly divided into three steps:
Firstly, guiding an electric automobile to accurately stop on a charging platform based on auxiliary technologies such as alignment guiding, load detection and the like, detecting whether a coupling mechanism is right opposite or not through a position detection technology, wherein a position detection error is +/-0.5 cm, and transmitting position information to a vehicle end through wireless communication when detecting a position;
And secondly, turning the secondary square receiving coil to a position perpendicular to the primary coil based on an electric power turning technology, and detecting whether the secondary is turned in place or not through an angle detection technology. The coupling mechanism is turned to a charging state, the turned angle is detected by the angle measuring instrument, the detected error is not more than 1 degree, and the information is transmitted to the vehicle end. The vehicle-mounted end can timely adjust the overturning angle through the returned information, so that the position of the coupling mechanism is ensured to be correct.
And thirdly, based on a wireless communication technology, the vehicle-mounted end is in wireless connection with a communication unit of the ground end and is identified, and the vehicle-mounted end sends vehicle information and vehicle state to the ground end. The vehicle-mounted terminal communication unit initiates a charging request after connection is established, and the ground terminal receives information and can start wireless charging after verification. The charging states such as ground end coil information, temperature and the like can be displayed on the vehicle end through the communication unit. After the communication connection is established, the information interaction of the vehicle-mounted equipment and the ground equipment is synchronous, and the safe implementation of the charging process is ensured.
In conclusion, the folding wireless electric energy receiving mechanism and the wireless charging automobile provided by the invention can be suitable for chassis heights of different automobile types, meanwhile, the coupling coefficient is greatly improved, the folding wireless electric energy receiving mechanism can still normally work when the system is offset, and the folding wireless electric energy receiving mechanism and the wireless charging automobile have good anti-offset performance, so that the output power of the system is greatly increased.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention and are intended to be within the scope of the appended claims and description.
Claims (8)
1. The folding wireless electric energy receiving mechanism is characterized by comprising an energy receiving coil and a coil folding mechanism, wherein the energy receiving coil is designed to be a square coil, and in an uncharged state, the coil folding mechanism controls the energy receiving coil to be folded to be in a horizontal state; in a charging state, the coil turnover mechanism pushes the energy receiving coil to extend to be in a vertical state;
The energy transmitting coils matched with the energy receiving coils are DD-type transmitting coils, the two D-type transmitting coils are connected in reverse series on the same plane, magnetic flux in the horizontal direction of the DD-type transmitting coils is concentrated near the square receiving coils, and the DD-type transmitting coils are matched with a coupling mechanism formed by the vertical square receiving coils for charging;
An angle measuring instrument is arranged in the coil turnover mechanism, and whether the energy receiving coil is turned to 90 degrees is detected through the angle measuring instrument.
2. The folding wireless power receiving mechanism according to claim 1, wherein a current detecting circuit is provided on the power receiving coil, the coil folding mechanism detects whether the power receiving coil enters a wireless charging area through the current detecting circuit, and when the power receiving coil enters the wireless charging area, the power receiving coil is pushed to be stretched into a vertical state through the coil folding mechanism.
3. The folding wireless power receiving mechanism according to claim 1 or 2, wherein in the wound coil housing case of the power receiving coil, a tail portion of the coil housing case is hinged to the vehicle chassis, and when the coil folding mechanism pushes the power receiving coil to extend in a vertical state, a front portion of the coil housing case is close to the ground.
4. The folding wireless power receiving mechanism according to claim 1 or 2, wherein in the wound coil housing case of the power receiving coil, a front portion of the coil housing case is hinged to the chassis of the vehicle, and when the coil folding mechanism pushes the power receiving coil to extend in a vertical state, a rear portion of the coil housing case is close to the ground.
5. The folding wireless power receiving mechanism of claim 1, wherein two D-shaped coils of the power transmitting coils are arranged side by side along a forward or backward direction of the electric vehicle.
6. A wireless charging car, characterized in that: comprising a folding radio energy receiving mechanism according to any one of claims 1-5.
7. The wireless charging car of claim 6, wherein: when charging is needed, a user sends a charging demand to the energy transmitting end and enters a wireless charging area in a forward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from back to front to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
8. The wireless charging car of claim 6, wherein: when charging is needed, a user sends a charging demand to an energy transmitting end and enters a wireless charging area in a backward mode; the energy transmitting end firstly transmits an alignment detection signal according to a first power level, and whether the energy transmitting end reaches a central area is determined by detecting the change condition of the induced current on the energy receiving coil; when the induction current reaches the maximum value, the electric automobile is stopped at the central area, the energy receiving coil is controlled by the coil turnover mechanism to turn over from front to back to be in a vertical state, and the energy transmitting end transmits an energy signal according to the second power level to realize wireless charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210861069.8A CN115284900B (en) | 2022-07-22 | 2022-07-22 | Folding wireless electric energy receiving mechanism and wireless car that charges |
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| CN202210861069.8A CN115284900B (en) | 2022-07-22 | 2022-07-22 | Folding wireless electric energy receiving mechanism and wireless car that charges |
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| CN115284900B true CN115284900B (en) | 2024-05-28 |
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| CN101443860A (en) * | 2006-05-11 | 2009-05-27 | 株式会社田村制作所 | Coil and coil shaping method |
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