CN111002847A - Mobile wireless charging system and method for electric automobile - Google Patents
Mobile wireless charging system and method for electric automobile Download PDFInfo
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- CN111002847A CN111002847A CN201911364290.7A CN201911364290A CN111002847A CN 111002847 A CN111002847 A CN 111002847A CN 201911364290 A CN201911364290 A CN 201911364290A CN 111002847 A CN111002847 A CN 111002847A
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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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- 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
- B60L53/30—Constructional details of charging stations
- B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
- B60L53/36—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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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
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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
- 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
- Y02T90/12—Electric charging stations
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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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a mobile wireless charging system for an electric automobile, which relates to the technical field of electric automobile charging, and comprises: the system comprises a power receiving side charging electronic system, a power supply side charging electronic system and a control center; the power receiving side charging system is arranged in a vehicle to be charged; the power supply side charging system is arranged in a power supply vehicle; the vehicle to be charged realizes information interaction with the power supply vehicle through the control center; the power supply side charging electronic system is provided with a transmitting coil; the power receiving side charging electronic system is provided with a receiving coil; the control center is used for controlling the power supply side charging subsystem to transmit electric energy to the power receiving side charging subsystem through the coupling effect of the transmitting coil and the receiving coil. The system and the method provided by the invention realize that the electric automobile which runs outside the charging road and has the charging requirement can be charged in moving.
Description
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to a mobile wireless charging system and method for an electric automobile.
Background
The electric automobile meets the requirements of green, environment-friendly and sustainable development of traffic, the development of new energy automobiles is taken as a main industrial direction by well-known automobile enterprises in the world, and a time schedule for stopping selling traditional fuel oil power automobiles is issued by many countries. With the increasing maturity and continuous progress of battery technology, the endurance mileage problem of the electric automobile is no longer a prominent contradiction. Along with the rapid increase of the quantity of electric vehicles, how to efficiently and conveniently charge the electric vehicles is one of the bottlenecks in further development of the electric vehicles.
The charging mode of the traditional electric automobile is mainly wired charging, and has a plurality of disadvantages. Firstly, the vehicle must be stopped firstly, the vehicle is charged on a fixedly constructed basic charging facility, the running electric vehicle cannot be charged, the connecting equipment needs to be plugged and pulled out every time of charging, and the connecting equipment can have the problems of abrasion or poor contact and the like after being plugged and pulled out for many times, so that high-voltage potential hazards are brought; secondly, building an infrastructure takes up more public area and also requires parking spaces to be set up.
Chinese patent No. 201710876513.2 discloses a road-section type mobile wireless charging station for electric vehicles, in which a plurality of energy transmitting coils are buried at intervals under the charging road, and an energy receiving coil matched with the energy transmitting coils is arranged on the electric vehicle to perform mobile wireless charging for the vehicle.
There are three scenarios in this patent:
(1) when the electric automobile runs to a road surface above the vehicle body detection device, the ground control unit controls to disconnect the connection between the energy transmitting coil behind the vehicle running direction and the ground power supply circuit.
(2) When the electric vehicle runs to the road surface above the vehicle body detection device, the ground control unit controls to disconnect the energy transmitting coil in the next charging section along the vehicle running direction from the ground power supply circuit.
(3) When the electric automobile runs to the road surface above the vehicle body detection device, the ground control unit controls to disconnect the connection between the energy transmitting coil and the ground power supply circuit behind the vehicle body detection device along the vehicle running direction.
At present, the most main implementation mode of dynamic wireless charging of an electric vehicle is to lay a road with a charging function, so that the vehicle can supplement energy in the driving process. The principle is as follows: the electric energy is transmitted to the electric energy picking mechanism at the vehicle receiving end running in a certain range on the ground in a high-frequency alternating magnetic field mode through the power supply guide rail buried under the ground, and then the vehicle-mounted energy storage equipment is charged, so that the electric automobile can carry a small number of battery packs, the endurance mileage of the electric automobile is prolonged, and meanwhile, the electric energy supply becomes safer and more convenient.
The disadvantages are that: firstly, energy can be provided only for electric vehicles running on a charging road, and energy cannot be provided for electric vehicles running outside the charging road; and secondly, the construction cost is high, the period is long, the later maintenance cost is extremely high, and the maintenance work is also complex to implement.
Disclosure of Invention
The invention aims to provide a mobile wireless charging system and a mobile wireless charging method for an electric automobile, so that the electric automobile which runs outside a charging road and has a charging requirement can be charged in a mobile process.
In order to achieve the purpose, the invention provides the following scheme:
an electric vehicle mobile wireless charging system, comprising: the system comprises a power receiving side charging electronic system, a power supply side charging electronic system and a control center;
the power receiving side charging system is arranged in a vehicle to be charged; the power supply side charging system is arranged in a power supply vehicle; the vehicle to be charged realizes information interaction with the power supply vehicle through the control center;
the power supply side charging electronic system is provided with a transmitting coil; the power receiving side charging electronic system is provided with a receiving coil;
the control center is used for controlling the power supply side charging subsystem to transmit electric energy to the power receiving side charging subsystem through the coupling effect of the transmitting coil and the receiving coil.
Optionally, the power supply side charging subsystem further includes: the high-frequency inverter comprises a power supply, a rectification chopper unit, a high-frequency inverter unit and a first resonance compensation network;
the power supply is connected with one end of the rectifying and chopping unit; the other end of the rectification chopping unit is connected with one end of the high-frequency inversion unit; the other end of the high-frequency inversion unit is connected with one end of the first resonance compensation network; and the other end of the first resonance compensation network is connected with the transmitting coil.
Optionally, the rectifying and chopping unit is a rectifying and chopping circuit.
Optionally, the power receiving side charging system further includes: the second resonance compensation network, the rectification filter unit and the power battery;
one end of the power battery is connected with one end of the rectification filter unit; the other end of the rectification filter unit is connected with one end of the second resonance compensation network; and the other end of the second resonance compensation network is connected with the receiving coil.
Optionally, the mobile wireless charging system for the electric vehicle further includes a first support structure; the transmitting coil is mounted on the first support structure; the first support structure is used for moving the transmitting coil to a first designated position and fixing.
Optionally, the electric vehicle mobile wireless charging system further includes a second support structure; the receive coil is mounted on the second support structure; the second support structure is used for moving the receiving coil to a second appointed position and fixing the receiving coil.
Optionally, when the charging operation is not performed, the transmitting coil is retracted to the chassis portion of the power supply vehicle, and when the charging operation is performed, the transmitting coil is moved and fixed to the head of the power supply vehicle through the first support structure.
Optionally, when the charging operation is not performed, the receiving coil is retracted on the bottom of the vehicle to be charged, and when the charging operation is performed, the receiving coil is moved and fixed at the tail of the vehicle to be charged through the second support structure.
In order to achieve the above purpose, the invention also provides the following scheme:
the electric vehicle mobile wireless charging method is applied to an electric vehicle mobile wireless charging system and comprises the following steps:
acquiring a charging request sent by a vehicle to be charged; the charging request comprises charging demand information and charging position information; the charging position information comprises a driving route and a target place;
determining a power supply vehicle and sending a charging request of the vehicle to be charged to the power supply vehicle;
when the vehicle to be charged and the power supply vehicle reach the target place, acquiring the driving information of the vehicle to be charged and sending the driving information to the power supply vehicle so as to keep the vehicle to be charged and the power supply vehicle in the same driving range; determining the distance between the vehicle to be charged and the power supply vehicle according to the driving information of the vehicle to be charged and the position information of the power supply vehicle;
judging whether the distance between the vehicle to be charged and the power supply vehicle is within a target range within a set time threshold value or not to obtain a first judgment result;
if the first judgment result shows that the distance between the vehicle to be charged and the power supply vehicle is not in the target range within the set time threshold, adjusting the running states of the vehicle to be charged and the power supply vehicle, and returning to the step of judging whether the distance between the vehicle to be charged and the power supply vehicle is in the target range within the set time threshold to obtain a first judgment result;
and if the first judgment result shows that the distance between the vehicle to be charged and the power supply vehicle is within a target range within a set time threshold, sending a charging instruction to the vehicle to be charged and the power supply vehicle so as to enable a power supply side charging subsystem of the power supply vehicle to transmit electric energy to a power receiving side charging electronic system of the vehicle to be charged through the coupling effect of a transmitting coil and a receiving coil.
Optionally, the mobile wireless charging method for the electric vehicle further includes:
when the power supply vehicle charges the vehicle to be charged, judging whether a new charging request is sent to the power supply vehicle or not, and obtaining a second judgment result;
if the second judgment result indicates that a new charging request is sent to the power supply vehicle, judging whether charging completion information sent by the vehicle to be charged is acquired, and acquiring a third judgment result;
if the third judgment result shows that the charging completion information of the vehicle to be charged is not acquired, controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is acquired and then stopping;
if the third judgment result indicates that the charging completion information of the vehicle to be charged is acquired, controlling the power supply vehicle to reach a new target location according to a new charging request;
and if the second judgment result indicates that a new charging request is not sent to the power supply vehicle, controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is obtained and then stopping.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a mobile wireless charging system and a mobile wireless charging method for an electric automobile, wherein the vehicle is used as a carrier of a charging system at a power supply side, so that the effect that the vehicle can be charged in time only after information interaction of two vehicles without being divided into driving sections is realized; in addition, with power supply side charging system build on the vehicle, construction cost and later stage cost of maintenance are all low, and it is more convenient to implement maintenance work, have reached low-cost construction, low-cost maintenance and have implemented more convenient purpose.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a first schematic view of a mobile wireless charging system for an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a mobile wireless charging system of an electric vehicle according to an embodiment of the invention;
FIG. 3 is a diagram illustrating the efficiency of a mobile wireless charging system for an electric vehicle according to an embodiment of the present invention;
fig. 4 is a flowchart of a mobile wireless charging method for an electric vehicle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a mobile wireless charging system and a mobile wireless charging method for an electric automobile, so that the electric automobile which runs outside a charging road and has a charging requirement can be charged in a mobile process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The receiving coil is moved to the rear of the tail of the vehicle to be charged and fixed by a mechanical or hydraulic structure, the transmitting coil is moved to the front of the head of the power supply vehicle and fixed, the vehicle to be charged runs in front of the head of the power supply vehicle, and the power supply vehicle runs behind the head of the power supply vehicle. By combining with a model prediction theory and through information interaction between the front vehicle and the rear vehicle and the control center, the two vehicles form a relative static state in the driving process, so that the mobile wireless charging of the electric vehicle based on the vehicle-mounted power supply and the coil is realized.
As shown in fig. 1-2, an electric vehicle mobile wireless charging system includes: the system comprises a power receiving side charging electronic system, a power supply side charging electronic system and a control center.
The power receiving side charging system is arranged in the vehicle to be charged; the power supply side charging system is arranged in the power supply vehicle; and the vehicle to be charged realizes information interaction with the power supply vehicle through the control center.
The power supply side charging electronic system is provided with a transmitting coil; the power receiving side charging system is provided with a receiving coil.
The control center is used for controlling the power supply side charging electronic system to transmit electric energy to the power receiving side charging electronic system through the coupling effect of the transmitting coil and the receiving coil.
Further, the power supply side charging subsystem further includes: the high-frequency power supply comprises a power supply, a rectifying chopper unit, a high-frequency inverter unit and a first resonance compensation network.
The power supply is connected with one end of the rectification chopper unit; the other end of the rectification chopping unit is connected with one end of the high-frequency inversion unit; the other end of the high-frequency inversion unit is connected with one end of the first resonance compensation network; the other end of the first resonance compensation network is connected with the transmitting coil. The high-frequency inverter unit is a full-bridge inverter circuit.
Preferably, the rectifying and chopping unit is a rectifying and chopping circuit.
In addition, the power receiving side charging system further includes: the second resonance compensation network, the rectification filter unit and the power battery.
One end of the power battery is connected with one end of the rectifying and filtering unit; the other end of the rectification filter unit is connected with one end of the second resonance compensation network; the other end of the second resonance compensation network is connected with the receiving coil. The first resonance compensation network and the second resonance compensation network are both series resonance compensation networks.
In order to better meet the practical application, the mobile wireless charging system for the electric automobile further comprises a first supporting structure; the transmitting coil is arranged on the first supporting structure; the first support structure is used for moving the transmitting coil to a first designated position and fixing.
In order to better meet the practical application, the mobile wireless charging system for the electric automobile further comprises a second supporting structure; the receiving coil is arranged on the second supporting structure; the second support structure is used for moving the receiving coil to a second appointed position and fixing the receiving coil.
Wherein the first support structure and the second support structure are mechanical or hydraulic mechanisms.
In actual use, the transmitting coil is retracted in the chassis portion of the electric supply vehicle when the charging operation is not performed, and the transmitting coil is moved and fixed at the head of the electric supply vehicle through the first support structure when the charging operation is performed.
In actual use, the receiving coil is retracted in the floor portion of the vehicle to be charged when the charging operation is not performed, and the receiving coil is moved and fixed at the rear of the vehicle to be charged through the second support structure when the charging operation is performed.
As shown in fig. 3-4, to achieve the above object, the present invention further provides the following solutions:
a mobile wireless charging method for an electric vehicle is applied to the mobile wireless charging system for the electric vehicle, and comprises the following steps:
step 101: acquiring a charging request sent by a vehicle to be charged; the charging request comprises charging demand information and charging position information; the charging position information includes a travel route and a target point.
Step 102: the power supply vehicle is determined, and a charging request of the vehicle to be charged is transmitted to the power supply vehicle.
Step 103: when the vehicle to be charged and the power supply vehicle reach a target place, acquiring the driving information of the vehicle to be charged and sending the driving information to the power supply vehicle so as to keep the vehicle to be charged and the power supply vehicle in the same driving range; and determining the distance between the vehicle to be charged and the power supply vehicle according to the running information of the vehicle to be charged and the position information of the power supply vehicle.
Step 104: judging whether the distance between the vehicle to be charged and the power supply vehicle is within a target range within a set time threshold value or not to obtain a first judgment result; if the first judgment result indicates that the distance between the vehicle to be charged and the power supply vehicle is not within the target range within the set time threshold, executing step 105; if the first determination result indicates that the distance between the vehicle to be charged and the power supply vehicle is within the target range within the set time threshold, step 106 is executed.
Step 105: and adjusting the running states of the vehicle to be charged and the power supply vehicle, and returning to the step 104.
Step 106: and sending the charging instruction to the vehicle to be charged and the power supply vehicle so that a power supply side charging system of the power supply vehicle transmits electric energy to a power receiving side charging system of the vehicle to be charged through the coupling effect of the transmitting coil and the receiving coil.
The method comprises the steps of adjusting the running states of a vehicle to be charged and a vehicle to be supplied with power, specifically adjusting the positions and/or the running speeds of the vehicle to be charged and the vehicle to be supplied with power.
In order to be more flexible in practical use, the mobile wireless charging method for the electric automobile further comprises the following steps:
step 107: when the power supply vehicle charges the vehicle to be charged, judging whether a new charging request is sent to the power supply vehicle or not, and obtaining a second judgment result; if the second determination result indicates that a new charge request is sent to the electric supply vehicle, step 108 is executed: if the second determination result indicates that a new charge request is not sent to the electric supply vehicle, step 111 is executed.
Step 108: judging whether charging completion information sent by the vehicle to be charged is acquired or not, and acquiring a third judgment result; if the third judgment result indicates that the charging completion information of the vehicle to be charged is not acquired, executing step 109; if the third determination result indicates that the charging completion information of the vehicle to be charged is acquired, step 110 is executed.
Step 109: and controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is acquired and then the charging is stopped.
Step 110: and controlling the power supply vehicle to arrive at a new target site according to the new charging request.
Step 111: and controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is acquired and then the charging is stopped.
In order to make the power supply vehicle perform the task more reasonably, before performing step 110, the method further includes:
step 112: judging whether the new charging request is executed or not to obtain a fourth judgment result; if the fourth determination result indicates that a new charging request has been executed, go to step 113; if the fourth determination result indicates that a new charging request has not been executed, a new charging request for the power supply vehicle is received, and step 110 is executed.
Step 113: and sending a command of returning to the power supply center to the power supply vehicle.
In the actual use process, the power supply vehicle further comprises a charging preparation process before charging, and the charging preparation process specifically comprises the following steps:
step 114: the control transmitting coil moves to the vicinity of the head of the power supply vehicle through the first supporting structure and is fixed; the receiving coil is controlled to move to the position near the tail of the vehicle to be charged through the second supporting structure and fixed;
step 115: judging whether the receiving coil and the transmitting coil are aligned or not to obtain a fifth judgment result; if the fifth judgment result shows that the receiving coil and the transmitting coil are not aligned, determining that the receiving coil and the transmitting coil cannot carry out wireless power transmission through magnetic coupling, and adjusting the positions of the power supply vehicle and the vehicle to be charged and/or the positions of the transmitting coil and the receiving coil; and if the fifth judgment result shows that the receiving coil and the transmitting coil are aligned, determining that the receiving coil and the transmitting coil can carry out wireless power transmission through magnetic coupling, and carrying out a charging process.
Wherein, judging whether the receiving coil and the transmitting coil are aligned specifically comprises:
step 116: the center positions of the receiving coil and the transmitting coil detected by the sensor are obtained.
Step 117: judging whether the central position of the receiving coil and the central position of the transmitting coil are located in a set range or not to obtain a sixth judgment result; if the sixth determination result indicates that the center position of the receiving coil and the position of the transmitting coil are within the setting range, step 118 is executed: if the sixth determination result indicates that the center position of the receiving coil and the position of the transmitting coil are not within the set range, step 119 is performed.
Step 118: the receive coil and transmit coil alignment is determined.
Step 119: a receive coil and a transmit coil misalignment are determined.
The process of judging whether the receiving coil and the transmitting coil are aligned is not only limited to the determination mode given in the embodiment, but also can achieve the purpose of judging whether the receiving coil and the transmitting coil are aligned.
The power supply vehicles are all intensively parked in the power supply center before the charging request is not executed. And when the power supply vehicle executes the charging request, returning to the power supply center.
Simplified work flow of the system:
(1) the vehicle to be charged sends a charging request to the control center, and the vehicle to be charged, the control center and the power supply vehicle determine information such as charging time, driving routes and target places after the information is mutually received.
(2) And after the vehicle to be charged and the power supply vehicle converge to the target place, the power supply vehicle acquires and analyzes the driving information of the vehicle to be charged and starts to drive with the vehicle.
(3) The power supply vehicle adjusts the self running state to keep the target distance between the power supply vehicle and the vehicle to be charged, and the power supply vehicle adjusts the self running state at any time by information interaction and model prediction during running so as to keep the distance between the power supply vehicle and the vehicle to be charged always within the target range. The target range is 0.6m to 1.2m, and is different according to the difference of a power supply side charging system or a power receiving side charging system mounted on each vehicle.
(4) And the control center sends a charging instruction after determining that the running states of the two vehicles are stable.
(5) After the vehicle to be charged and the power supply vehicle receive the charging instruction, the receiving coil and the transmitting coil are respectively moved to the rear of the tail of the vehicle to be charged and the front of the head of the power supply vehicle and are fixed.
(6) After the two coils are respectively detected to be fixedly aligned at the designated positions, the rectifying chopper circuit of the transmitting end controls the full-bridge inverter circuit to input direct-current voltage according to the requirement of output power, the direct-current voltage is converted into high-frequency voltage through the high-frequency inverter unit and is transmitted to the transmitting coil of the transmitting end, resonance is formed between the high-frequency voltage and the receiving coil of the receiving end through magnetic coupling, and electric energy of the receiving end is rectified and converted into direct-current voltage to charge the power battery.
(7) And after the charging is finished, the vehicle to be charged continues to run, the power supply vehicle checks whether a new charging request is received, if so, the vehicle runs to the target place, and if not, the vehicle runs back.
For example, as shown in fig. 3, when a vehicle to be charged issues a charging request, and the power supply vehicle receives the request, it travels to a specified location to join. Setting the initial position difference of the two vehicles at a specified place to be 45 meters, driving the vehicle to be charged in front, wherein the vehicle length is 5 meters, and the vehicle speed is 100km/h, and driving at a constant speed; the power supply vehicle is driven at the back, the vehicle length is 8 meters, the vehicle speed is 80km/h, and the front vehicle is tracked; the length d of the movable coil mechanical telescopic fixed structure is 30 cm. The mobile wireless charging system with the system efficiency of about 80% and the output power of 3KW can be realized.
The vehicle-mounted power supply side charging system provided by the invention is used as a mobile power supply to charge a running electric vehicle, and the magnetic coupling wireless power transmission mechanism and the model prediction vehicle tracking mechanism of the electric vehicle are combined, so that the vehicle-mounted power supply side charging system has the following advantages:
(1) because the power supply side charging system takes the vehicle as a carrier and is movable, when an electric vehicle running on an 'uncharged road' has a charging requirement, the electric vehicle can be charged in time only by making a request and performing information interaction between the two vehicles.
(2) Because the power supply side charging system is carried on the vehicle, the construction cost is relatively low, the period is relatively short, the later maintenance cost is relatively low, and the maintenance work is relatively convenient to implement.
(3) Compared with a charging road paved in a sectional manner, the charging road has no frequent on-off of subsystems, and the consumption and damage to system components are reduced; compared with a centrally laid charging road, the charging efficiency and the energy utilization rate are improved.
In the system and the method provided by the invention, if the following adjustment is made, the electric automobile which runs outside the charging road and has the charging requirement can still be charged in the moving process.
(1) A moving tool for mounting a power supply side charging system is changed.
(2) The vehicle tracking mechanism is changed, and the tracking running of the front and rear vehicles is realized by a method such as fuzzy control.
(3) Changing the position of the transmitting coil and the receiving coil relative to the vehicle during charging;
(4) the number of the entire system charging vehicles is changed.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides an electric automobile removes wireless charging system which characterized in that, electric automobile removes wireless charging system includes: the system comprises a power receiving side charging electronic system, a power supply side charging electronic system and a control center;
the power receiving side charging system is arranged in a vehicle to be charged; the power supply side charging system is arranged in a power supply vehicle; the vehicle to be charged realizes information interaction with the power supply vehicle through the control center;
the power supply side charging electronic system is provided with a transmitting coil; the power receiving side charging electronic system is provided with a receiving coil;
the control center is used for controlling the power supply side charging subsystem to transmit electric energy to the power receiving side charging subsystem through the coupling effect of the transmitting coil and the receiving coil.
2. The mobile wireless charging system of claim 1, wherein the power supply side charging system further comprises: the high-frequency inverter comprises a power supply, a rectification chopper unit, a high-frequency inverter unit and a first resonance compensation network;
the power supply is connected with one end of the rectifying and chopping unit; the other end of the rectification chopping unit is connected with one end of the high-frequency inversion unit; the other end of the high-frequency inversion unit is connected with one end of the first resonance compensation network; and the other end of the first resonance compensation network is connected with the transmitting coil.
3. The mobile wireless charging system for the electric automobile according to claim 2, wherein the rectifying and chopping unit is a rectifying and chopping circuit.
4. The mobile wireless charging system of claim 1, wherein the power-receiving side charging system further comprises: the second resonance compensation network, the rectification filter unit and the power battery;
one end of the power battery is connected with one end of the rectification filter unit; the other end of the rectification filter unit is connected with one end of the second resonance compensation network; and the other end of the second resonance compensation network is connected with the receiving coil.
5. The electric vehicle mobile wireless charging system of claim 1, further comprising a first support structure; the transmitting coil is mounted on the first support structure; the first support structure is used for moving the transmitting coil to a first designated position and fixing.
6. The electric vehicle mobile wireless charging system of claim 1, further comprising a second support structure; the receive coil is mounted on the second support structure; the second support structure is used for moving the receiving coil to a second appointed position and fixing the receiving coil.
7. The mobile wireless charging system for electric vehicles according to claim 5, wherein the transmitting coil is retracted in a chassis portion of an electric supply vehicle when a charging operation is not performed, and the transmitting coil is moved and fixed at a head of the electric supply vehicle through the first support structure when the charging operation is performed.
8. The mobile wireless charging system for electric vehicles according to claim 6, wherein the receiving coil is retracted in a floor portion of a vehicle to be charged when a charging operation is not performed, and the receiving coil is moved and fixed at a rear end of the vehicle to be charged through a second support structure when the charging operation is performed.
9. An electric vehicle mobile wireless charging method is applied to the electric vehicle mobile wireless charging system according to claim 1, and the electric vehicle mobile wireless charging method comprises the following steps:
acquiring a charging request sent by a vehicle to be charged; the charging request comprises charging demand information and charging position information; the charging position information comprises a driving route and a target place;
determining a power supply vehicle and sending a charging request of the vehicle to be charged to the power supply vehicle;
when the vehicle to be charged and the power supply vehicle reach the target place, acquiring running information of the vehicle to be charged and sending the running information to the power supply vehicle so as to keep the distance between the vehicle to be charged and the power supply vehicle within a target range; determining the distance between the vehicle to be charged and the power supply vehicle according to the driving information of the vehicle to be charged and the position information of the power supply vehicle;
judging whether the distance between the vehicle to be charged and the power supply vehicle is within a target range within a set time threshold value or not to obtain a first judgment result;
if the first judgment result shows that the distance between the vehicle to be charged and the power supply vehicle is not in the target range within the set time threshold, adjusting the running states of the vehicle to be charged and the power supply vehicle, and returning to the step of judging whether the distance between the vehicle to be charged and the power supply vehicle is in the target range within the set time threshold to obtain a first judgment result;
and if the first judgment result shows that the distance between the vehicle to be charged and the power supply vehicle is within a target range within a set time threshold, sending a charging instruction to the vehicle to be charged and the power supply vehicle so as to enable a power supply side charging subsystem of the power supply vehicle to transmit electric energy to a power receiving side charging electronic system of the vehicle to be charged through the coupling effect of a transmitting coil and a receiving coil.
10. The mobile wireless charging method for the electric vehicle according to claim 9, further comprising:
when the power supply vehicle charges the vehicle to be charged, judging whether a new charging request is sent to the power supply vehicle or not, and obtaining a second judgment result;
if the second judgment result indicates that a new charging request is sent to the power supply vehicle, judging whether charging completion information sent by the vehicle to be charged is acquired, and acquiring a third judgment result;
if the third judgment result shows that the charging completion information of the vehicle to be charged is not acquired, controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is acquired and then stopping;
if the third judgment result indicates that the charging completion information of the vehicle to be charged is acquired, controlling the power supply vehicle to reach a new target location according to a new charging request;
and if the second judgment result indicates that a new charging request is not sent to the power supply vehicle, controlling the power supply vehicle to continue charging the vehicle to be charged until the charging completion information sent by the vehicle to be charged is obtained and then stopping.
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| CN201911364290.7A CN111002847A (en) | 2019-12-26 | 2019-12-26 | Mobile wireless charging system and method for electric automobile |
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| CN201911364290.7A CN111002847A (en) | 2019-12-26 | 2019-12-26 | Mobile wireless charging system and method for electric automobile |
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| CN112238784A (en) * | 2020-07-08 | 2021-01-19 | 北京新能源汽车技术创新中心有限公司 | Wireless power supply electric automobile and control program thereof |
| CN113147439A (en) * | 2021-05-07 | 2021-07-23 | 齐齐哈尔大学 | New energy automobile rescue trailer system and method |
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