CN105322629A - Wirelessly charging automobile and system - Google Patents

Abstract

The invention discloses a wireless charging automobile and system. Wherein, the car includes: a wireless power receiving circuit, used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and generate an induced current according to the change of the magnetic field; a charging circuit, coupled with the wireless power receiving circuit connected for charging an electrical storage device of the vehicle using the induced current. The invention solves the technical problem in the related art that the charging car can only be charged on a fixed charging pile.

Description

Wireless Charging Vehicles and Systems

technical field

The present invention relates to the field of wireless charging, in particular to a wireless charging vehicle and system.

Background technique

Wireless power transmission technology began in 1889 with the research of the Croatian-American physicist Tesla. In recent years, electromagnetic induction wireless power transfer technology has developed rapidly as an emerging wireless power transfer technology, and has caused huge repercussions in the field of wireless power transfer, making wireless power transfer technology become another hot issue for scholars at home and abroad. .

The electric vehicle industry is a sunrise industry that adapts to the depletion of energy resources and environmental crisis in the future. However, electric vehicles are facing a series of problems such as difficulty in charging, less land for charging pile construction, and short mileage of electric vehicles.

Both the wireless charging car and the wireless charging pile in the related art are fixedly charged. There are many problems in this way, such as: although the wireless charging pile does not occupy the ground land, it already occupies the underground land, some places and equipment are not suitable for installing wireless charging piles due to water accumulation, and there are problems such as long-term occupation of charging parking spaces.

For the above problems, no effective solution has been proposed yet.

Contents of the invention

Embodiments of the present invention provide a wireless charging car and system to at least solve the technical problem in the related art that charging cars can only be charged on fixed charging piles.

According to an aspect of an embodiment of the present invention, there is provided a wireless charging car, including: a wireless power receiving circuit, used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and generate Induction current; a charging circuit, coupled and connected to the wireless energy receiving circuit, for using the induction current to charge the electric storage device of the vehicle.

Further, the wireless power receiving circuit includes: the receiving coil, a compensation circuit, a first rectification and filtering circuit, a voltage stabilizing circuit, and a power adjustment circuit, wherein the receiving coil, the compensation circuit, the first rectification The filtering circuit, the voltage stabilizing circuit, and the power regulating circuit are sequentially coupled and connected.

Further, the compensation circuit is used to receive the AC current generated by the receiving coil, perform power compensation and sinusoidal waveform correction on the AC current, and transmit it to the first rectification and filtering circuit.

Further, the receiving coil is arranged on the chassis of the automobile.

According to another aspect of the embodiments of the present invention, there is also provided a wireless charging system, including: the wireless charging car; a wireless power transmission circuit, used to provide power for the car when the car is running through a power transmission coil Provide an alternating magnetic field.

Further, the wireless energy transmission circuit includes: a power supply, a second rectification and filtering circuit, an inverter circuit, a boost circuit, and a power transmission coil, wherein the power supply, the second rectification and filtering circuit, and the inverter circuit , the step-up circuit, and the power transmission coil are connected in sequence.

Further, the wireless energy transmitting circuit is arranged under the road on which the automobile is driving.

Further, the wireless energy transmission circuit provides the automobile with the alternating magnetic field with a constant frequency and phase.

Further, the natural frequency of the receiving coil of the vehicle is the same as the frequency generated by the power transmitting coil.

Further, the frequency generated by the power transmitting coil is within a preset frequency set, wherein the preset frequency set is associated with the natural frequency of the receiving coil.

In the embodiment of the present invention, a wireless power receiving circuit is used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and to generate an induced current according to the change of the magnetic field; the charging circuit is connected to the wireless power receiving circuit The circuit coupling connection is used to use the induction current to charge the electric storage device of the automobile. The wireless energy receiving circuit receives the changing magnetic field and generates the induction current when the automobile is running, so that the automobile can also be charged during the driving process. The purpose of wireless charging further solves the technical problem in the related art that charging cars can only be charged on fixed charging piles.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a device block diagram of a wireless charging car according to an embodiment of the present invention;

2 is a system diagram of wireless charging according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a wireless charging system according to an embodiment of the present invention;

Fig. 4 is a structural diagram of a wireless charging system according to an embodiment of the present invention.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

According to an embodiment of the present invention, an embodiment of a wireless charging car is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, Although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

Fig. 1 is a device block diagram of a wireless charging car according to an embodiment of the present invention. As shown in Fig. 1, the car includes:

The wireless energy receiving circuit 10 is used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and generate an induced current according to the change of the magnetic field;

The charging circuit 12 is coupled and connected with the wireless power receiving circuit, and is used for charging the electric storage device of the automobile by using the induced current.

When the car is running, it receives a changing magnetic field to generate an induced current, and the power transmission coil and the vehicle's receiving coil realize wireless energy transmission through electromagnetic resonance. The charging circuit 12 can use the induced current to charge the battery of the vehicle, and can also use the induced current to drive the vehicle. The power transmission coil can be set under the road where the car is driving, and the road is a wireless charging road at this time.

In the embodiment of the present invention, a wireless power receiving circuit is used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and to generate an induced current according to the change of the magnetic field; the charging circuit is coupled to the wireless power receiving circuit, It is used to use the induction current to charge the electric storage device of the automobile. The wireless energy receiving circuit receives the changing magnetic field and generates the induction current when the automobile is running, which achieves the purpose of wireless charging while the automobile is running, and then solves the problem of In the related art, there is a technical problem that charging vehicles can only be charged on fixed charging piles.

Optionally, installing a wireless power receiving circuit on the chassis of an electric vehicle capable of wireless charging can maximize energy reception and further maximize energy conversion. The wireless power receiving circuit includes a plurality of sub-circuits, which are a receiving coil, a compensation circuit, a first rectifying and filtering circuit, a voltage stabilizing circuit and a power regulating circuit coupled in sequence.

In the optional embodiment above, the compensation circuit is used to receive the AC current generated by the receiving coil, and perform power compensation and sinusoidal waveform correction on the AC current before transmitting it to the first rectification and filtering circuit. Other sub-circuits are conventional circuits for wireless charging, and no further details are given here.

The power transmitting coil and the receiving coil adopt the method of electromagnetic resonance. When the frequency of the oscillating magnetic field generated by the power transmitting coil is the same or similar to the natural frequency of the vehicle receiving coil, the similarity can mean that the frequency of the oscillating magnetic field generated by the power transmitting coil is within the preset frequency. In the frequency range or frequency set, the frequency range or frequency set and the natural frequency of the vehicle receiving coil, such as the natural frequency is 50HZ, the preset frequency range or frequency set can be 45HZ-55HZ, the receiving coil will resonate, so as to realize The internal energy of the resonant system composed of the power transmitting coil and the vehicle receiving coil is transmitted wirelessly. The current generated by the receiving coil is rectified to charge the battery, and the battery drives the electric vehicle to drive, so as to achieve the effect of making the electric vehicle drive while charging on the road without occupying the charging pile and consuming charging time.

According to an embodiment of the present invention, a wireless charging system is also provided, including a charging device and a car to be charged. Fig. 2 is a system diagram of wireless charging according to an embodiment of the present invention. As shown in Fig. 2, the system includes:

Wireless charging of cars 20;

The wireless energy transmitting circuit 22 is used to provide an alternating magnetic field for the vehicle through the power transmission coil when the vehicle is running.

The wireless charging system of this embodiment can establish a wireless charging highway based on the laying of wireless charging lines all over the line, and a traffic system that provides power for wireless charging vehicles. The traditional wireless charging pile immobilizes the charging pile and the charging car, and transmits electric energy through electromagnetic induction, so as to achieve the purpose of charging. In this embodiment, a wireless energy transmission circuit is laid under the wireless charging road for the moving automobile. The circuit provides an alternating magnetic field with constant frequency and phase, and a wireless power receiving circuit is installed on the electric vehicle chassis. The wireless power receiving circuit includes a receiving coil connected in sequence, a compensation circuit, a first rectifying and filtering circuit, a voltage stabilizing circuit and a power regulating circuit. The power transmitting coil and the receiving coil adopt the method of electromagnetic resonance. When the frequency of the oscillating magnetic field generated by the power transmitting coil is the same or close to the natural frequency of the vehicle receiving coil, the receiving coil will resonate, thus realizing the composition of the power transmitting coil and the vehicle receiving coil The internal energy of the resonant system is wirelessly transmitted. The charging circuit receives the current generated by the receiving coil, charges the battery after rectification, and the battery drives the electric vehicle to drive, so as to achieve the effect of making the electric vehicle drive while charging on the road without occupying the charging pile and consuming charging time.

Optionally, the wireless energy transmitting circuit is set under the road on which the car is driving, and can be set on the surface layer of the road to provide alternating current for the car running on the road. It is also possible to arrange only the power transmission coil of the wireless energy transmitting circuit 22 under the road where the automobile runs, and arrange other equipment in a safe area to avoid crushing and damage due to driving.

The power transmission coil is laid under the ground of the road without occupying the surface space. The electric vehicle side wireless power receiving circuit is installed on the chassis of the car. When it is driving on this kind of road with wireless charging function, the wireless charging receiving device on the car can be activated. , receive the electric energy emitted by the road side, and charge the battery of the electric vehicle without looking for charging piles for fixed-point charging, and the charging process does not affect normal driving.

Optionally, the charging car can also be equipped with a detection circuit to detect whether the battery is fully charged according to a certain cycle. When it is detected that the rechargeable battery is fully charged, the wireless power receiving circuit can be turned off to stop the electric power receiving on the electric vehicle side.

Fig. 3 is a schematic diagram of a wireless charging system according to an embodiment of the present invention. As shown in Fig. 3, a wireless charging car includes a receiving coil, a wireless charging road is provided with a power transmitting coil, and the wireless charging car runs on the wireless charging road.

Fig. 4 is a system structure diagram of wireless charging according to an embodiment of the present invention. As shown in Fig. 4 , the wireless charging system for electric vehicles according to the embodiment of the present invention mainly includes two parts: a wireless power transmission circuit 22 laid on the road side, and an electric The wireless power receiving circuit 12 installed on the chassis of the automobile.

Wherein, the wireless power transmitting circuit 22 on the power transmitting side includes a power supply connected in sequence, a second rectifying and filtering circuit, an inverter circuit, a boost circuit and a power transmitting coil, and the power transmitting coil provides an alternating magnetic field with a constant frequency and phase. The installed wireless energy receiving circuit 12, the wireless energy receiving circuit 12 includes a receiving coil, a compensation circuit, a first rectifying and filtering circuit, a voltage stabilizing circuit and a power regulating circuit connected in sequence, and finally to a storage battery. The power transmitting coil and the receiving coil adopt the method of electromagnetic resonance. When the frequency of the oscillating magnetic field generated by the power transmitting coil is the same or close to the natural frequency of the vehicle receiving coil, the receiving coil will resonate, thus realizing the composition of the power transmitting coil and the vehicle receiving coil The internal energy of the resonant system is wirelessly transmitted.

Through this embodiment, a dedicated lane for wireless charging electric vehicles on expressways can be established to realize wireless charging of electric vehicles, and can charge while driving, saving the waiting time of traditional fixed-point charging. The solution of the present invention can effectively alleviate the currently ubiquitous problems of short endurance time of electric vehicles, long charging time, and long-term occupation of charging pile parking spaces by charging vehicles. It provides new ideas and solutions to promote the popularization of electric vehicles and realize clean energy substitution.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be another division method. For example, multiple units or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the related technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. Several instructions are included to make a computer device (which may be a personal computer, server or network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), mobile hard disk, magnetic disk or optical disk.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A wireless charging car, characterized in that it comprises: The wireless energy receiving circuit is used to use the receiving coil to receive the magnetic field emitted by the power transmitting coil when the car is running, and generate an induced current according to the change of the magnetic field; The charging circuit is coupled and connected with the wireless power receiving circuit, and is used for charging the electric storage device of the automobile by using the induced current. 2. The automobile according to claim 1, wherein the wireless power receiving circuit comprises: The receiving coil, the compensation circuit, the first rectifying and filtering circuit, the voltage stabilizing circuit and the power regulating circuit, wherein the receiving coil, the compensating circuit, the first rectifying and filtering circuit, the stabilizing circuit, the The power regulating circuit is sequentially coupled and connected. 3. The automobile according to claim 2, wherein the compensation circuit is used to receive the alternating current generated by the receiving coil, and perform power compensation and sinusoidal waveform correction on the alternating current and transmit it to the The first rectification filter circuit. 4. The automobile according to any one of claims 1 to 3, wherein the receiving coil is arranged on the chassis of the automobile. 5. A wireless charging system, comprising: The automobile according to any one of claims 1 to 4; The wireless energy transmitting circuit is used to provide an alternating magnetic field for the vehicle when the vehicle is running through the power transmission coil. 6. The system according to claim 5, wherein the wireless power transmitting circuit comprises: A power supply, a second rectification and filtering circuit, an inverter circuit, a boost circuit, and a power transmission coil, wherein the power supply, the second rectification and filtering circuit, the inverter circuit, the boost circuit, and the power transmission The coils are connected sequentially. 7. The system according to claim 5, characterized in that, the wireless power transmitting circuit is arranged under the road on which the automobile is driving. 8. The system according to claim 5, wherein the wireless power transmission circuit provides the automobile with the alternating magnetic field with a constant frequency and phase. 9. The system of claim 5, wherein the natural frequency of the receiving coil of the vehicle is the same as the frequency generated by the transmitting coil. 10. The system of claim 5, wherein the frequency generated by the power transmitting coil is within a preset frequency set, wherein the preset frequency set is associated with a natural frequency of the receiving coil.