CN219056006U - Wireless power transmission device of electric automobile - Google Patents
Wireless power transmission device of electric automobile Download PDFInfo
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- CN219056006U CN219056006U CN202222425060.0U CN202222425060U CN219056006U CN 219056006 U CN219056006 U CN 219056006U CN 202222425060 U CN202222425060 U CN 202222425060U CN 219056006 U CN219056006 U CN 219056006U
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- 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
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Abstract
The utility model discloses a wireless power transmission device of an electric automobile, which comprises a power supply rail, a power supply vehicle, a wireless power transmitting device and a wireless power receiving device. The power supply rail is internally provided with a plurality of power transmission conductors, the power supply vehicle comprises an electric brush, a pulley and a power supply positioning communication module, the electric brush is in sliding contact with the power transmission conductors to obtain electric energy to be supplied to the power supply vehicle and a wireless electric energy transmitting device for use, and a wireless electric energy receiving device on the electric vehicle obtains electric energy from the wireless electric energy transmitting device in a magnetic field coupling mode. The utility model has the advantages of higher wireless power transmission efficiency of the electric automobile, simple equipment maintenance and lower cost.
Description
Technical Field
The utility model belongs to the technical field of wireless power transmission control, and relates to a wireless power transmission device of an electric automobile.
Background
With the rapid increase of the global electric vehicle conservation amount, the problems of difficult electric vehicle charging, insufficient battery endurance, poor battery adaptability in low-temperature environment and the like become remarkable. In order to reduce anxiety about charging and cruising, governments and enterprises have invested a great deal of funds in recent years to build on-line public charging piles. However, a large amount of land is occupied by the construction of the charging piles, so that a large amount of charging piles are often constructed in remote positions far away from residential areas and commercial areas, the electric automobile is very inconvenient to charge by owners, one pile in the urban area is difficult, and the phenomenon that a large amount of charging piles are idle in suburban areas is frequent. The charging requirement of the electric automobile with the online charging pile which is difficult to meet the increasing scale is built, and the electric automobile can be charged while driving by the wireless charging technology, so that the electric automobile becomes a hot spot for technical research at home and abroad. At present, wireless electric automobile charging mainly realizes wireless transmission of electric energy through a magnetic field coupling mode, and the distance and the offset between a wireless electric energy transmitting coil and a wireless electric energy receiving coil can seriously influence the electric energy transmission efficiency, and the larger the distance is and the larger the offset is, the lower the corresponding transmission efficiency is.
In the prior art, a wireless electric energy transmitting device is generally required to be fixedly buried under a road, and wireless electric energy transmitting coils are required to be arranged at intervals of a plurality of distances, so that the effect of wireless charging of an electric automobile in the moving process is achieved. However, during the running process of the vehicle, a large-amplitude offset, including a horizontal offset and a vertical offset, often occurs between a wireless power transmitting coil fixed under a road surface and a wireless power receiving coil mounted on an electric vehicle. Therefore, the wireless power transmission efficiency can be greatly fluctuated, the charging efficiency is relatively poor, and the power loss is large. Meanwhile, the wireless electric energy transmitting device is fixedly buried below a road, and the road surface must be excavated when equipment faults need to be overhauled and maintained, so that the overhauling and maintenance cost is very high, and the traffic jam is caused when the equipment is overhauled and maintained.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model discloses a wireless electric energy transmission device of an electric automobile, so as to achieve the purposes of high wireless charging efficiency, simple maintenance of charging equipment and lower cost in the moving process of the electric automobile.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a wireless power transmission device of an electric automobile comprises a power supply rail, a power supply vehicle, a wireless power transmitting device and a wireless power receiving device.
The power supply rail is internally provided with a plurality of power transmission conductors, the power transmission conductors are electrically connected with an external power supply grid, the power supply vehicle comprises electric brushes, pulleys and a power supply positioning communication module, the electric brushes are in sliding contact with the power transmission conductors to obtain electric energy to be supplied to the power supply vehicle and the wireless electric energy emission device for use, and the power supply vehicle runs on the power supply rail through the pulleys.
The wireless electric energy transmitting device comprises a wireless electric energy transmitting coil and a control transmitting circuit, and is arranged on the surface of the power supply vehicle and connected with the power supply positioning communication module and the electric brush.
The wireless electric energy receiving device is arranged on the electric automobile, and electric energy is obtained from the wireless electric energy transmitting device in a magnetic field coupling mode.
The wireless power receiving device comprises a wireless power receiving coil, a vehicle-mounted positioning communication module, an alignment detection module and a charging module.
The vehicle-mounted positioning communication module and the power supply positioning communication module comprise a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope.
The alignment detection module comprises a Hall sensor and a detection controller, wherein the Hall sensor converts a detected magnetic field intensity signal between the wireless power transmitting coil and the wireless power receiving coil into an electric signal and transmits the electric signal to the detection controller.
The alignment detection module comprises a Hall sensor and a detection controller, and a magnet is arranged on the surface of a protective shell of the wireless electric energy transmitting device.
The power supply rail may be disposed under the road surface of a single lane, and may be installed in a vertical manner to form a circulation rail.
The power supply rail can be arranged below the pavement of the bidirectional lane, is arranged across the two lanes in a horizontal mode, and forms a circulating rail through bidirectional layout.
The power supply rail may be provided at a side of a single lane to be installed in a vertical manner to form one circulation rail.
The power supply rail can be arranged on two side surfaces of the middle isolation belt of the bidirectional lane, and can be arranged across the middle isolation belt in a horizontal mode, and a circulating rail is formed through bidirectional layout.
The power supply rail comprises a rail waiting area, a rail charging area and an overhaul maintenance area, the power supply vehicle is in queue for executing a charging task in the rail waiting area, the power supply vehicle runs in the rail charging area when executing the charging task, and the power supply vehicle stays in the overhaul maintenance area when carrying out overhaul maintenance.
The beneficial effects of the utility model are as follows:
the utility model relates to a wireless electric energy transmission technical scheme of an electric automobile, which has high efficiency, low cost and simple overhaul and maintenance, and is characterized in that a wireless electric energy transmitting coil arranged on a power supply track and a wireless electric energy receiving coil on the running electric automobile are kept to synchronously move and keep a relatively static state, so that the offset of the wireless electric energy transmitting coil and the wireless electric energy receiving coil is reduced, the magnetic field coupling degree of the wireless electric energy transmitting coil and the wireless electric energy receiving coil is improved, the wireless electric energy transmission stability is improved, and the wireless charging efficiency of the running electric automobile is finally improved. Meanwhile, as the wireless electric energy transmitting device moves along with the power supply vehicle circularly on the power supply rail, the wireless electric energy transmitting device is not fixed below the road surface, and the wireless electric energy transmitting device can be installed, deployed and overhauled and maintained in the later period without digging the road surface, the overall cost is obviously reduced, and the popularization and the application of the technical scheme are facilitated.
Drawings
Fig. 1 is a schematic top view of a power supply rail disposed on a side of a bidirectional lane.
Fig. 2 is a schematic side view of the power supply rail disposed below the road surface of the single lane.
Fig. 3 is a schematic view of a power supply rail and a power supply vehicle disposed on a side of a road.
Fig. 4 is a cross-sectional view of a power supply rail.
The list of reference numerals is as follows:
01. a power supply rail; 02. a power supply vehicle; 03. a wireless power transmitting device; 04. a wireless power receiving device;
011. a power transmission conductor; 012. a track housing; 013. a suspension clamp; 014. a set screw; 015. a track waiting area; 016. a maintenance area is overhauled;
021. a brush; 022. a drive pulley; 023. a driven pulley; 024. a mounting hole; 025. and a power supply positioning communication module.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1, 2, 3 and 4, the wireless power transmission device for the electric automobile comprises a power supply track 01, a power supply vehicle 02, a wireless power transmitting device 03 and a wireless power receiving device 04.
The shape of the power supply track 01 comprises a rectangular circulation track and an elliptic circulation track. A plurality of power transmission conductors 011 are laid in the power supply track 01, and the power transmission conductors 011 are electrically connected with an external power supply grid. The power transmission conductors are insulated from each other and from the track housing 012, thereby ensuring the safety of power supply. The power supply track 01 is arranged on urban roads and expressway straight road sections with wide visual field as far as possible, and is prevented from being arranged on tunnels, viaducts, ramp and curve road sections as far as possible. To facilitate the dispatching of the power supply vehicle 02 and the maintenance of the power supply track 01, the power supply track 01 should be installed on the side of the road or under the road surface at intervals, for example, the maximum length of each section of the expressway is not more than 5 km, and the maximum length of each section of the urban road is not more than 2 km.
The power supply car 02 comprises a brush 021, a pulley and a power supply positioning communication module 025, a main body part of the power supply car 02 is positioned outside the track shell 012, and the pulley part of the power supply car 02 is embedded inside the track shell 012. The electric brush 021 and the power transmission conductor 011 inside the power supply track 01 acquire electric energy through sliding contact, and the acquired electric energy is supplied to the pulley and the wireless electric energy transmitting device 03 for use.
The pulleys include a drive control circuit, a motor, a drive pulley 022 and a driven pulley 023, preferably a direct current brushless hub motor with the motor and the drive pulley 022 integrated, and the drive control circuit drives the power supply vehicle 02 to run on the power supply track 01 in combination with the driven pulley 023. The greater number of driving and driven pulleys 022 and 023 is advantageous in improving the running speed and stability of the power supply car, but also increases costs and control difficulty accordingly, and the corresponding number of driving and driven pulleys 022 and 023 may be selected according to the setting of the power supply rail 01 at different speed limit sections. In the off-highway section, the electric vehicle 02 includes at least one driving pulley 022 and one driven pulley 023; if the power supply track 01 is provided on an expressway section, the power supply vehicle 02 should include at least 2 driving pulleys 022 and 2 driven pulleys 023.
The power supply positioning communication module 025 of the power supply vehicle 02 comprises a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope, and can acquire real-time position information, speed and acceleration information of the power supply vehicle 02. The vehicle-mounted positioning communication module on the electric automobile also comprises a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope, and can acquire real-time position information, speed and acceleration information of the electric automobile. The satellite positioning module supports the United states GPS or China Beidou navigation, in order to improve positioning accuracy, a real-time dynamic differential technology (RTK) can be adopted, and the current RTK positioning technology can achieve real-time global centimeter-level positioning accuracy, so that the alignment of a transmitting coil and a receiving coil of the electric vehicle 02 and the electric vehicle in the driving process is greatly facilitated. The wireless communication module can adopt a LoRa, NB-IoT, 4G or 5G wireless communication network, and the wireless communication module mainly aims at realizing data interconnection and intercommunication between the vehicle-mounted positioning communication module and the power supply positioning communication module 025.
The wireless power transmitting device 03 comprises a wireless power transmitting coil and a control transmitting circuit, the wireless power transmitting device 03 is connected with the power supply positioning communication module 025 and the electric brush 021, and the wireless power transmitting device 03 is installed on the surface of the power supply vehicle 02 through the mounting hole 024 on the surface of the power supply vehicle 02. The wireless power receiving device 04 comprises a wireless power receiving coil, a vehicle-mounted positioning communication module, an alignment detection module and a charging module. The wireless power transmitting device 03 and the wireless power receiving device 04 are both provided with plastic protective cases, and the protective cases play roles in preventing water and dust.
As shown in fig. 1 and 3, if the power feeding rail 01 is installed on the road side, the power feeding rail 01 is mounted on a supporting facility such as a rail guard or a concrete partition wall on the road side by a suspension clip 013 and a set screw 014. At this time, the opening of the track housing 012 is downward, the wireless power transmitting device 03 is installed at the side of the electric car 02, and the wireless power receiving device 04 is installed at the side of the electric car, and the installation height should be identical to the height of the wireless power transmitting device 03 from the road surface, so that the wireless power receiving coil and the wireless power transmitting coil can be maintained in horizontal alignment when the electric car 02 and the electric car are traveling side by side.
As shown in fig. 2, if the power supply rail 01 is disposed under the road surface, the opening of the rail housing 012 is upward, the suspension clips 013 and the fixing screws 014 are downward, the suspension clips 014 are mounted on the fixing support of the trench which is dug in advance, the top of the trench is covered with a trench cover plate made of glass fiber reinforced plastic (glass fiber reinforced plastic) which can bear the rolling of the automobile, and the trench cover plate made of the material does not obstruct the electromagnetic wave propagation. At this time, the wireless power transmitting device 03 is installed directly above the power supply car 02, and the wireless power receiving device 04 is installed below the chassis of the electric car, so that the wireless power receiving coil and the wireless power transmitting coil can be vertically aligned when the power supply car 02 runs in synchronization with the electric car.
The wireless power receiving device 04 obtains power from the wireless power transmitting device 03 through a magnetic field coupling method, and the magnetic field coupling method comprises electromagnetic induction type and magnetic field resonance type. The electromagnetic induction type is that a wireless electric energy transmitting coil on the wireless electric energy transmitting device 03 generates a magnetic field around the transmitting coil through alternating current with a certain frequency, and correspondingly generates an induction electromotive force which changes with the alternating current in a wireless electric energy receiving coil of the wireless electric energy receiving device 04, so that wireless transmission of electric energy is realized, and an electric automobile can be charged after energy conversion.
The magnetic field resonance is that when alternating current is supplied to the wireless electric energy transmitting coil, the alternating current and the wireless electric energy receiving coil are adjusted to the same frequency, so that the alternating current and the wireless electric energy receiving coil generate magnetic field resonance at a specific frequency, the wireless electric energy receiving coil can receive energy emitted by the wireless electric energy transmitting coil, and wireless charging of the electric automobile can be realized after energy conversion. The magnetic field resonance type magnetic field coupling mode is preferably selected so as to obtain better wireless power transmission efficiency at a longer distance.
The wireless power receiving device 04 further comprises an alignment detection module, and the alignment detection module specifically comprises a Hall sensor and a detection controller. The hall sensor is a magnetic field sensor made according to the hall effect. In the present utility model, the hall sensor may be applied in two ways, wherein one way is that the hall sensor is disposed on the surface of the protective shell of the wireless power receiving apparatus 04, so that when the wireless power transmitting coil and the wireless power receiving coil are closely aligned, the hall sensor is just located between the wireless power transmitting coil and the wireless power receiving coil. This approach requires that the wireless power transmitting coil be energized with an alternating current to generate a magnetic field before alignment, and the hall sensor converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal, e.g., the higher the magnetic field, the higher the voltage, the weaker the magnetic field, and the lower the voltage. The Hall sensor transmits the detected electric signal to the detection controller, and the detection controller judges the magnetic field intensity between the transmitting coil and the receiving coil according to the electric signal, so as to judge whether the alignment between the wireless electric energy transmitting coil and the wireless electric energy receiving coil is accurate.
Specifically, the electric signal value corresponding to the magnetic field intensity after accurate alignment between the transmitting coil and the receiving coil can be used as a critical value to be input to the detection controller in advance. In the initial situation, when the hall sensor detects that the alignment of the transmitting coil and the receiving coil is deviated, the electric vehicle 02 continuously adjusts the speed and the acceleration thereof according to the real-time position information, the speed and the acceleration information of the electric vehicle received by the power supply positioning communication module 025, so as to adjust the relative positions of the transmitting coil and the receiving coil. When the Hall sensor detects that the value of the electric signal corresponding to the magnetic field strength reaches or is close to the critical value, the transmitting coil and the receiving coil reach the optimal matching state, and the wireless electric energy transmission efficiency is highest. After the detection controller judges that the alignment is accurate according to the electric signal value, the detection controller sends an alignment accurate signal and real-time running parameters of the electric automobile to the power supply positioning communication module 025 through the vehicle-mounted positioning communication module, and the power supply vehicle 02 adjusts the running speed and the acceleration of the power supply vehicle 02 to be consistent with the speed and the acceleration of the electric automobile according to the data received by the power supply positioning communication module 025 by controlling the rotating speed of the motor, so that the power supply vehicle 02 and the electric automobile can run synchronously.
Another setting mode of the Hall sensor is that the Hall sensor is arranged on the surface of the protective shell of the wireless power receiving device 04, and meanwhile, a vertical bar magnet is arranged on the surface of the protective shell of the wireless power transmitting device 03, and the magnet can be a sintered neodymium-iron-boron magnet (N42H magnet). The hall sensor should adopt the remote hall sensor that the sensitivity is higher and the detection distance is farther, for example can purchase the hall sensor of maximum detection distance 300mm on the market, also can customize the hall sensor that the detection distance can reach 500mm from the producer. The vertical bar magnet can be identified by the hall sensor when the wireless power transmitting coil is aligned with the wireless power receiving coil, thereby enabling the hall sensor to generate a corresponding electrical signal. The mode does not need to require that the wireless electric energy transmitting coil is conducted with alternating current to generate a magnetic field before alignment, and the Hall sensor detects whether a magnet exists in a detection distance range right in front of the Hall sensor so as to generate a corresponding electric signal, for example, if the magnet is sensed, the high level is output, and if the magnet is not sensed, no electric signal is output. And the electric signal output by the Hall sensor is transmitted to the detection controller, and the detection controller judges whether the alignment between the wireless electric energy transmitting coil and the wireless electric energy receiving coil is accurate or not according to the electric signal. If the alignment is accurate, the detection controller sends an alignment accurate signal and real-time running parameters of the electric automobile to the power supply positioning communication module 025 through the vehicle-mounted positioning communication module, and the power supply vehicle 02 adjusts the running speed and the acceleration of the power supply vehicle 02 to be consistent with the speed and the acceleration of the electric automobile by controlling the rotating speed of the motor according to the data received by the power supply positioning communication module 025, so that the power supply vehicle 02 and the electric automobile can run synchronously.
If the alignment is accurate, after the electric vehicle 02 and the electric vehicle keep running synchronously for a period of time, the transmission coil and the receiving coil are aligned again to have larger deviation due to the conditions of sudden rapid acceleration or emergency braking and the like of the electric vehicle, then the electric vehicle 02 can continuously adjust the speed and the acceleration of the electric vehicle according to the real-time position information, the speed and the acceleration information of the electric vehicle received by the power supply positioning communication module 025, so that the relative positions of the transmission coil and the receiving coil are adjusted, and then the alignment detection is performed again, so that the electric vehicle 02 and the electric vehicle keep running synchronously again.
The charging module in the wireless power receiving device 04 can acquire charging parameter information of the electric automobile, including battery power information, charging voltage parameters, charging current parameters, charging account ID information and the like. The vehicle-mounted positioning communication module in the wireless electric energy receiving device 04 is internally provided with a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope, so that real-time position information, vehicle speed information and acceleration information of the electric vehicle can be obtained, and the information and charging parameter information of the electric vehicle are transmitted to the power supply positioning communication module 025 through a wireless network.
As shown in fig. 2, the power supply rail 01 may be disposed under the road surface of a single lane, and installed in a vertical manner to form one circulation rail. One long side of the power supply rail 01 is on the upper side and the other long side is on the lower side, thereby forming a circulation rail. In the installation mode, the power supply vehicle 02 moves forwards along the upper edge of the power supply rail 01, and when charging is finished, the power supply vehicle 02 moves back along the lower edge of the power supply rail 01 and continuously circulates back and forth along the power supply rail 01.
The power supply track 01 can also be arranged below the pavement of the bidirectional lane, and can be arranged across the two lanes in a horizontal mode, and a circulating track is formed through bidirectional layout. The power supply vehicle 02 moves forwards along one long side of the power supply rail 01 below the road surface in the installation mode, and the power supply vehicle 02 moves backwards along the other long side of the opposite lane side after the charging is finished, namely, the power supply vehicle continuously circulates and returns along the power supply rail 01 below the bidirectional lane surface.
As shown in fig. 1, the power supply rail 01 may be provided at both sides of the intermediate barrier in the bidirectional lane, installed in a recumbent manner across the intermediate barrier, and formed into one circulation rail by bidirectional layout. In this installation mode, the power supply vehicle 02 moves forward along one long side of the power supply track 01, and when charging is finished, the power supply vehicle 02 moves back along the other long side of the opposite lane side, namely, the power supply track 01 along the two-way lane side continuously circulates and returns.
The power supply rail 01 may also be disposed on a side of a single lane, installed on a supporting facility such as a rail guard or a concrete partition wall on a side of a road in a vertical manner, with one long side of the power supply rail 01 being on top and the other long side being on the bottom, thereby forming a circulation rail. In the installation mode, the power supply vehicle 02 moves forwards along the lower edge of the power supply rail 01, and when charging is finished, the power supply vehicle 02 moves back along the upper edge of the power supply rail 01 and continuously circulates back and forth along the power supply rail 01.
When the power supply track 01 is arranged on the side surface of a road, a protective plate can be arranged outside the power supply track 01, nonmetal materials are used for the protective plate, net holes can be formed in the lower portion of the protective plate for heat dissipation of the wireless power transmitting device 03, and the upper portion and the two side surfaces of the protective plate are sealed, so that the waterproof and dustproof effects can be achieved. The power supply track 01, the power supply vehicle 02 and the wireless power emission device 03 are integrally arranged in the protective plate, and the protective plate can also prevent pedestrians, animals, non-motor vehicles, motor vehicles and the like on the road from suddenly colliding and contacting the power supply track 01 to cause electric shock accidents, so that the safety of the power supply track 01 is better improved.
No matter the power supply track 01 is arranged on the side surface of a road or below the road pavement, when the power supply car 02 and the wireless power transmission device 03 need to be overhauled and maintained, for example, the electric brushes 021 are worn to a certain extent and need to be replaced or certain electronic elements of the wireless power transmission device 03 are damaged and need to be replaced, then the power supply car 02 needing to be overhauled and maintained can be operated to the overhauling and maintenance area 016 to stop, and corresponding overhauling and maintenance can be conveniently carried out by staff. Thus, the workload is smaller and the cost is lower. Even the power supply track 01 is arranged below a road surface, the equipment can be overhauled and maintained only by opening the road surface waterproof cover plate of the overhauling and maintenance area 016, and the wireless charging technical scheme of arranging the fixed coil below the road surface is not needed like other wireless charging technical schemes, and the whole section of road surface is required to be excavated.
The wireless electric energy transmission device of the electric automobile is applied to a track type wireless electric energy transmission system, and the system also comprises a remote dispatching center which is mainly used for processing charging requests and system charging of the electric automobile and can remotely dispatch different power supply automobiles 02 according to the charging requests of a plurality of electric automobiles so as to reasonably distribute charging tasks.
The specific working process of charging the electric automobile through the track type wireless electric energy transmission system is as follows:
when an electric automobile provided with the vehicle-mounted positioning communication module is about to enter a wireless charging lane where a power supply track 01 is deployed, a charging module on the electric automobile automatically acquires charging parameter information of the electric automobile, if the residual electric quantity SOC of a power battery is lower than 80%, the charging module automatically sends charging request information to a remote dispatching center through a wireless communication network by the vehicle-mounted positioning communication module, the charging request information comprises battery electric quantity information, charging voltage parameters, charging current parameters, charging account ID information and the like, and the remote dispatching center reads all charging account ID information which is stored in advance by a server and registered by the electric automobile for comparison and verification.
If the verification is not passed, the remote dispatching center returns the information of 'refusing the charging request' to the vehicle-mounted positioning communication module of the electric automobile; if the verification is passed, the information of 'receiving the charging request' is returned to the electric automobile, and at the moment, the vehicle-mounted positioning communication module of the electric automobile continuously sends real-time running parameters of the electric automobile to the power supply positioning communication module 025 every 500 milliseconds, wherein the real-time running parameters comprise real-time position information, vehicle speed information and acceleration information.
The remote dispatching center sends a dispatching signal for executing the charging task to the forefront power supply vehicle 02 positioned in the track waiting area 015 through a wireless communication network, the power supply vehicle 02 accelerates forward to run away from the track waiting area 015 along the power supply track 01 according to the real-time running parameters of the electric vehicle checked by the charging request to enter the track charging area, and the power supply vehicle 02 runs to the front of the electric vehicle, but the running speed is slightly less than the speed of the electric vehicle at the rear.
Through satellite positioning data, when the electric automobile behind gradually approaches the power supply car 02 in front, and the linear distance between the two is smaller than about 5 meters, the control circuit of the wireless power transmitting device 03 of the power supply car 02 enables the wireless power transmitting coil to generate an alternating magnetic field with the frequency of 85kHz, and meanwhile, the wireless power receiving coil on the electric automobile is also in resonance with the frequency of 85 kHz. At this time, the Hall sensor arranged on the surface of the protective shell of the wireless electric energy receiving device 04 on the electric automobile converts the detected magnetic field intensity signal between the wireless electric energy transmitting coil and the wireless electric energy receiving coil into an electric signal to be transmitted to the detection controller, and the detection controller judges whether the wireless electric energy transmitting coil and the wireless electric energy receiving coil are aligned accurately according to an electric signal critical value preset in the electric automobile.
When the alignment is accurate, the detection controller sends an alignment accurate signal and real-time running parameters of the electric automobile to the power supply positioning communication module 025 through the vehicle-mounted positioning communication module, and the power supply automobile 02 adjusts the running speed and the acceleration of the power supply automobile 02 to be consistent with those of the electric automobile through controlling the rotating speed of the motor, so that the synchronous forward running with the electric automobile is realized. When the power supply vehicle 02 and the electric vehicle run synchronously, the electric vehicle can receive the energy with the highest efficiency from the wireless electric energy transmitting coil by utilizing the wireless electric energy receiving coil through a magnetic field coupling mode, and the obtained energy is converted into alternating current and direct current energy to charge a power battery in the electric vehicle.
When the battery is fully charged or the electric vehicle leaves the track charging area, the charging module on the electric vehicle sends charging termination request information to the power supply vehicle 02 and the remote dispatching center through the vehicle-mounted positioning communication module, and the remote dispatching center deducts corresponding charging expense from a charging account ID corresponding to the electric vehicle. After receiving the information of stopping the charging request, the power supply vehicle 02 stops the power output of the wireless power transmitting coil and simultaneously continues to run along the power supply track 01 until the power supply vehicle 02 enters the track waiting area 015 again, and then is queued for executing the next charging task.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (10)
1. The utility model provides an electric automobile wireless power transmission device which characterized in that: the wireless power supply system comprises a power supply rail, a power supply vehicle, a wireless power transmitting device and a wireless power receiving device;
the power supply rail is internally provided with a plurality of power transmission conductors, the power transmission conductors are electrically connected with an external power supply grid, the power supply vehicle comprises electric brushes, pulleys and a power supply positioning communication module, the electric brushes are in sliding contact with the power transmission conductors to obtain electric energy for supplying the power to the power supply vehicle and the wireless electric energy emission device, and the power supply vehicle runs on the power supply rail through the pulleys;
the wireless electric energy transmitting device comprises a wireless electric energy transmitting coil and a control transmitting circuit, and is arranged on the surface of the power supply vehicle and connected with the power supply positioning communication module and the electric brush;
the wireless electric energy receiving device is arranged on the electric automobile, and electric energy is obtained from the wireless electric energy transmitting device in a magnetic field coupling mode.
2. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the wireless power receiving device comprises a wireless power receiving coil, a vehicle-mounted positioning communication module, an alignment detection module and a charging module.
3. The wireless power transmission device for an electric vehicle according to claim 2, wherein: the vehicle-mounted positioning communication module and the power supply positioning communication module comprise a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope.
4. The wireless power transmission device for an electric vehicle according to claim 2, wherein: the alignment detection module comprises a Hall sensor and a detection controller, wherein the Hall sensor converts a detected magnetic field intensity signal between the wireless power transmitting coil and the wireless power receiving coil into an electric signal and transmits the electric signal to the detection controller.
5. The wireless power transmission device for an electric vehicle according to claim 2, wherein: the alignment detection module comprises a Hall sensor and a detection controller, and a magnet is arranged on the surface of a protective shell of the wireless electric energy transmitting device.
6. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the power supply rail may be disposed under the road surface of a single lane, and may be installed in a vertical manner to form a circulation rail.
7. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the power supply rail can be arranged below the pavement of the bidirectional lane, is arranged across the two lanes in a horizontal mode, and forms a circulating rail through bidirectional layout.
8. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the power supply rail may be provided at a side of a single lane to be installed in a vertical manner to form one circulation rail.
9. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the power supply rail can be arranged on two side surfaces of the middle isolation belt of the bidirectional lane, and can be arranged across the middle isolation belt in a horizontal mode, and a circulating rail is formed through bidirectional layout.
10. The wireless power transmission device of an electric vehicle according to claim 1, wherein: the power supply rail comprises a rail waiting area, a rail charging area and an overhaul maintenance area, the power supply vehicle is in queue for executing a charging task in the rail waiting area, the power supply vehicle runs in the rail charging area when executing the charging task, and the power supply vehicle stays in the overhaul maintenance area when carrying out overhaul maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222425060.0U CN219056006U (en) | 2022-09-15 | 2022-09-15 | Wireless power transmission device of electric automobile |
Applications Claiming Priority (1)
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| WO2024055936A1 (en) * | 2022-09-15 | 2024-03-21 | 东莞市幻影创新科技有限公司 | Electric vehicle wireless power transfer system and control method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024055936A1 (en) * | 2022-09-15 | 2024-03-21 | 东莞市幻影创新科技有限公司 | Electric vehicle wireless power transfer system and control method therefor |
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