CN111152670A

CN111152670A - Dynamic charging method

Info

Publication number: CN111152670A
Application number: CN201911344568.4A
Authority: CN
Inventors: 王哲; 陆钧; 贺凡波; 葛俊杰; 马俊超
Original assignee: Beijing Invispower Co Ltd
Current assignee: Hefei Yougan Technology Co.,Ltd.
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-05-15
Anticipated expiration: 2039-12-24
Also published as: CN111152670B

Abstract

The invention discloses a dynamic charging method, which comprises the following steps: when at least one first communication device is in signal communication with the second communication device, the first communication device which realizes the signal communication sends a control signal to the power supply end working circuit, and the working circuit enables a power supply to supply power to a transmitting coil which forms a corresponding relation with the first communication device which realizes the signal communication according to the control signal. The dynamic charging method can realize charging of the charged equipment in the moving process, has strong reliability and is slightly influenced by the use environment.

Description

Dynamic charging method

Technical Field

The invention relates to the field of wireless energy transmission, in particular to a dynamic charging method.

Background

The electric vehicle wireless charging technology is static wireless charging and dynamic wireless charging, wherein a transmitting coil is continuously laid below a road surface in the dynamic wireless charging, and the electric vehicle in running is dynamically charged by utilizing the principle of electromagnetic coupling. The relative position of the transmitting coil and the receiving coil in the dynamic wireless charging system is constantly changed, and the moving speed of the receiving coil following the vehicle is usually very fast, so that accurate and fast coil position detection is very important.

The dynamic wireless charging coil position detection usually adopts infrared, laser, ultrasonic and other universal sensors, and the use effect of the other sensors is greatly influenced by the environment. Another common way is to cause a series of electrical parameters of the surface transmitting device, such as current, voltage and phase, resonant frequency, etc., to change when the receiving coil and the transmitting coil begin to couple, and to detect the changes in these parameters, the position can be determined. However, this solution requires each ground transmitting device to be always in a standby operation state, and has poor reliability and untimely response.

Disclosure of Invention

The invention provides a dynamic charging method which can meet the charging requirement in the running process of a vehicle.

The dynamic charging method of the invention comprises the following steps: when at least one first communication device is in signal communication with the second communication device, the first communication device which realizes the signal communication sends a control signal to the power supply end working circuit, and the working circuit enables a power supply to supply power to a transmitting coil which forms a corresponding relation with the first communication device which realizes the signal communication according to the control signal.

Preferably, when the first communication device is in signal communication with the second communication device, the first communicator with the highest signal communication strength is used as a selected first communicator, and the operating circuit enables the power supply to supply power to the transmitting coil corresponding to the selected first communication device according to the control signal of the selected first communicator.

Preferably, when the first communication device and the second communication device are in signal communication, the signal communication strength is related to the distance.

Preferably, when any of the first communication device and the second communication device are in signal communication, the first communication device adjacent to the first communication device forming the signal communication is in an operating state, otherwise, the first communication device may be in a standby state.

Preferably, the first communication device has a plurality of communicators, each of the communicators being in signal communication with the second communication device when the first communication device and the second communication device are in signal communication, and the distance to the second communication device is determined based on a difference between each of the communicators when in signal communication.

Preferably, when the first communication device and the second communication device are in signal communication, information is transmitted in a binary mode through electric signals.

The dynamic charging method can realize charging of the charged equipment in the moving process, has strong reliability and is slightly influenced by the use environment.

Drawings

FIG. 1 is a schematic diagram of a dynamic charging system;

fig. 2 is a schematic diagram of a dynamic charging system with selected first and second communication devices in signal communication;

FIG. 3 is a schematic diagram of a coil configuration in a dynamic charging system;

FIG. 4 is another schematic diagram of a coil configuration in a dynamic charging system;

fig. 5 is a schematic diagram of a coil structure adopted by a first communication device and a second communication device in a dynamic charging system;

fig. 6 is a logic diagram of a dynamic charging method.

Reference numerals:

a transmitting coil 1; a power supply end operating circuit 2; a first communication device 3; the selected first communication device 3'; a receiving coil 4; a receiving end working circuit 5; a load 6; a second communication device 7; a power supply end resonance compensation circuit 21, a power supply end electric energy conversion circuit 22, a power supply switching circuit 23 and a power supply end signal transceiving circuit 24; a communicator 31; a receiving end resonance compensation circuit 51, a receiving end electric energy conversion circuit 52 and a receiving end signal transceiving circuit 53; the first coil unit X1; a second coil unit Y1; and a third coil unit Z1.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The invention discloses a dynamic charging system, which belongs to the wireless charging technology and comprises a power supply end (also called a transmitting end) and a receiving end, wherein the two ends transmit energy in a wireless mode. Referring to fig. 1 and 2, at the power supply end, the main components for realizing wireless charging include: the power supply 0, the power supply end working circuit 2, and the transmitting coil 1 further include a rectifier, an inverter, a resonance compensator, etc., and of course, the rectifier, the inverter, and the resonance compensator may be a part of the power supply end working circuit 2 or may be independent components.

At the receiving end, the main parts for realizing wireless charging comprise: a receiving coil 4 and a receiving end working circuit 5, and also a rectifier, which may be a part of the receiving end working circuit 5 or a separate component. Of course, a load 6 is also included, and the load 6 may be an electrical appliance, more particularly, an energy storage battery.

In addition, dynamic charging is realized, for example, electric vehicles are charged during running, and it is ensured that the power supply end can activate the transmitting coil 1 at the corresponding position along with the condition that the receiving end is at different positions in the moving process. In order to achieve this dynamic charging, the transmitting coil 1 of the supply terminal has at least one and the same number of first communication means 3. The receiving end has a second communication device 7

The following is a detailed description:

in the present application, the transmitting coil 1 of the power supply end has at least one, and for the wireless charging of the electric vehicle, the transmitting coil 1 may be arranged along a plurality of paths to be arranged, where the paths are the paths along which the vehicle moves, that is, the paths along which the receiving end passes. Besides the transmitting coils 1, the device also comprises first communication devices 3, the number of the first communication devices 3 is the same as that of the transmitting coils 1, and a corresponding relation is formed between one first communication device 3 and one transmitting coil 1; the first communication device 3 is in communication (either wired or wireless) with the power supply end working circuit 2. The power supply end working circuit 2 is communicated between each transmitting coil 1 and the power supply 0, so that the power supply 0 selectively supplies power to the transmitting coil 1.

The correspondence relationship between the first communication device 3 and the transmission coil 1 includes both correspondence in data and correspondence in position. That is, a first communication device 3 and a transmitting coil 1 form a unique, one-to-one correspondence relationship. The power supply end working circuit 2 matches the corresponding relationship, that is, when any one of the first communication devices 3 receives the signal of the transmitting end, the power supply end working circuit 2 controls the corresponding transmitting coil 1 to work. The first communication device 3 corresponds to the transmitting coil 1 in position, generally, when the receiving end of the first communication device 3 is close to the first communication device 3 in the working range of the transmitting coil 1, the corresponding transmitting coil 1 works, and the receiving coil 4 is coupled with the other transmitting coil to realize electric energy transmission. Of course, the first communication device 3 may also be outside the operating range of the transmitting coil 1, and its purpose is to provide information to ensure that the corresponding first communication device 3 starts to operate, as long as it is ensured that the transmitting coil 1 can operate when the receiving end reaches the corresponding position — for example, the first communication device 3 may predict that the receiving end still has t time to reach the corresponding transmitting coil 1, and then the corresponding transmitting coil 1 starts to operate after t time.

It should be noted that although dynamic charging is implemented, the present application is not limited to charging only in a dynamic state, and a receiving end may be in a fixed state and may be charged as well.

No matter the receiving end is moving or stationary, the second communication device 7 and the first communication device 3 realize signal communication, and it can be regarded as starting charging, at this time, the first communication device 3 in signal communication provides a signal to the power supply end working circuit 2, and the power supply end working circuit 2 acquires the signal of the first communication device 3, so that it can know which transmitting coil 1 corresponds to it, and control the power supply 0 to supply power to the corresponding transmitting coil 1. That is, the power supply terminal operating circuit 2 selectively controls the corresponding transmitting coil 1 to operate according to the communication condition of different first communication devices 3.

The communication between the second communication apparatus 7 and the first communication apparatus 3 is not limited to a one-to-one correspondence, and the second communication apparatus 7 may be in signal communication with one or a plurality of first communication apparatuses 3. When the signals of two signal communicators are communicated, the strength of the signal communication (signal strength for short) can be in direct proportion to the distance between the two, so that the signal strength can be different when the second communication device 7 is in signal communication with the plurality of first communication devices 3.

In general, the transmitting coil 1 is disposed in a "line" shape, and for dynamic charging of an electric vehicle, the "line" is disposed along a traveling path of the electric vehicle. During the movement of the vehicle, or the movement of the receiving coil, the second communication device 7 may be in signal communication with the plurality of first communication devices 3, where the signals transmitted include: at least one of position information, receiving end information, and charging demand parameter. In the case of wireless charging of an electric vehicle, the receiving-end information includes information such as vehicle type, which may need to be charged after the power supply end passes verification.

When the first communication device 3 and the second communication device 7 are in signal communication, the signal strength is different according to the distance, and the power supply end working circuit 2 can enable the transmitting coil 1 corresponding to the first communication device 3 with the highest signal strength to be electrified. When the two are in signal communication, the transmitting coil 1 corresponding to the first communication device 3 closest to the second communication device 7 is powered when the transmitted information comprises position information, so that the transmitting coil 1 and the receiving coil 4 can be better aligned in the position relation, and the wireless charging efficiency is better. The first communication device 3 with the highest signal communication strength when signal communication is realized can be used as the selected first communication device 3 ', and the power supply end working circuit 2 can enable the transmitting coil 1 corresponding to the selected first communication device 3' to be powered. As in fig. 2, the selected first communication device 3' is shown. It should be noted that the selected first communication apparatus 3 'is for convenience of description, and its structure, function, etc. are identical to those of the first communication apparatus 3, and will be referred to as the selected first communication apparatus 3' only when the intensity of signal communication with the second communication apparatus 7 is the maximum of all the first communication apparatuses 3 in signal communication with the second communication apparatus 7.

Of course, in some embodiments, all of the transmitting coils 1 corresponding to the first communication devices 3 in which signal communication occurs may be powered, so as to implement wireless power supply. In such an embodiment, each transmitting coil 1 may have the same operating efficiency, or may have the highest signal strength or the highest operating efficiency at the closest position, and the power of the other transmitting coils may be adjusted according to the distance or the signal strength.

In a preferred embodiment, the first communication device 3 is disposed near the transmitting coil 1 forming the corresponding relationship, and when the first communication device 3 and the second communication device 7 are in signal communication, the receiving coil 4 and the transmitting coil 1 are considered to be in an aligned state or a state close to the aligned state, and at this time, the corresponding transmitting coil 1 starts to operate, and wireless energy transmission is realized with the receiving coil 4. With the movement of the receiving end, the signal communication strength of the first communication device 3 and the second communication device 7 at the position is weakened until no signal communication relation exists, and finally, the power supply to the transmitting coil 1 is stopped, but the power supply is supplied to the corresponding transmitting coil 1 which realizes the signal communication relation newly, so that the dynamic wireless charging is realized.

As can be seen from the above, the intensity of the signal communication may be related to the distance, so that which transmitting coil 1 operates can be determined by the intensity or distance of the signal communication. In some embodiments, the first communication device 3 and the second communication device 7 may be both coil structures and may also be both distance sensors (or position sensors). When the coil structure is used, because of different distances, the coupling degree of the coil is different, different electric signals are generated, and the intensity of signal communication can be judged according to the signals. When the distance sensor is used, the distance relation can be directly obtained, and the judgment of the signal intensity can be carried out without using the distance sensor or the signal intensity can be high when the distance is considered to be short.

It should be noted that the above mentioned signal strength, in some embodiments, indicates the strength of the signal communication between the first communication device 3 and the second communication device 7, and the signal strength is weak when the distance is far. In other embodiments, however, the signal strength indicates the distance between the first communication device 3 and the second communication device 7 (indirectly indicating the distance between the transmitting coil 1 and the receiving coil 4), and the signal strength is considered to be high when the distance is close, and is considered to be low otherwise.

In order to ensure that the first communication device 3 and the second communication device 7 are in better signal communication, both communicators have at least one working orientation. It is preferable to adopt three orientations, taking dynamic wireless charging of an electric vehicle as an example, defining a vehicle forward or reverse direction as an X direction, a left-right direction corresponding to the forward direction as a Y direction, and a Z direction perpendicular to a vehicle floor, of course, the X direction, the Y direction, and the Z direction are perpendicular to each other. The Y-direction and the X-direction are typical when the first communication means 3 and the second communication means 7 have only two operating orientations. Preferably, three directions, i.e., an X direction, a Y direction, and a Z direction, will be provided. It is to be understood that the preferred embodiment for at least two operational orientations, in practice, is the X direction if only one orientation is used, and that in general one orientation is used. It is noted that the directions in which the vehicle advances and reverses are both the X direction, the directions to the left and right are both the Y direction, and the directions pointing to the ground and to the roof perpendicular to the vehicle floor are both the Z direction.

The second communication device 7 is installed at the receiving end, and generally only one second communication device 7 is installed at the vehicle end, taking the example of dynamic wireless charging of the electric vehicle as an example. The first communication apparatus 3 is installed at the power supply end, and in order to better determine the position of the receiving end, as shown in fig. 5, one first communication apparatus 3 may have a plurality of communicators 31 therein, for example, four communicators 31, distributed in a square manner. In this way, based on the difference in the signal communication between each communicator 31 and the second communication device 7 (for example, the time difference of the transmitted information in the signal communication), a more accurate position of the receiving end can be obtained, and therefore, the position information can be transmitted to the second communication device 7 to help the receiving end to obtain a better charging position. The second communication device 7 may be one communicator. When the coil structures are adopted for both the first communication apparatus 3 and the second communication apparatus 7, it is understood that the first communication apparatus 3 has a plurality of coil structures and the second communication apparatus 7 has one coil structure.

Different implementations are used for the first communication device 3 and the second communication device 7, and the corresponding operation orientations are also different. When they use the distance sensor, the orientation of the working head of the sensor can be adjusted. When they use coils, the communication of signals is realized by the electromagnetic effect between the coils, the electromagnetic wave in the coils is used as the carrier of the signals, the electromagnetic wave can be transmitted to all directions, one coil can realize the above-mentioned multiple working directions, but in order to ensure the stability of the signals during working and the similar strength of the signals in all directions, a 'space coil' structure, that is, a coil with multiple orientations in space, can be generally adopted. It is to be noted that, when the first communication device 3 is composed of a plurality of communicators, each communicator may employ the coil structure.

Referring to fig. 3 and 4, two coil structures are shown, each of which is composed of three coil units, respectively, a first coil unit X1, and the working direction is the X direction; a second coil unit Y1, the working direction being the Y direction; and the working direction of the third coil unit Z1 is Z direction. Although shaped like a gyroscope, they do not generally rotate relative to each other when in operation, and their orientation of operation is fixed.

The coil units in fig. 3 and 4 are circular coil units and square coil units, which are only used as examples and are not used for limiting the shape, and coils with other shapes are suitable for the application as long as the corresponding functions can be achieved. In addition, it should be noted that, coils (hereinafter, referred to as communication coils) used as the first communication device 3 (or a plurality of communicators constituting the first communication device 3) and the second communication device 7 have the same working principle as that of the power coil (i.e., the transmitting coil 1 and the receiving coil 4), and both adopt the principle of wireless energy transfer, and only serve as communicators, and the energy wirelessly transferred by the communicators includes corresponding signals (signals transferred when two communicators communicate signals), how to integrate the signals into electric energy, and rules during integration or analysis. For example by adjusting electrical signals such as current, voltage, frequency, level, etc. of the electrical energy. As mentioned above, the location information, the receiving end information, the charging requirement, etc. can be transmitted by the power signal. Like transferring information in binary, for example by high and low levels is equivalent to two symbols, "1" and "0" in binary.

Because the principle of the power coil and the communication coil is the same, the working frequency of the power coil and the working frequency of the communication coil are different in order to ensure that the power coil and the communication coil do not interfere with each other.

The above embodiment is preferred to use three coil units, and two coil units are used as the coils of the first communication apparatus 3 and the second communication apparatus 7, and these two coils may be the first coil unit X1 whose operation direction is the X direction and the third coil unit Z1 whose operation direction is the Z direction. It is to be noted that "first", "second", and "third" are not used as a count or a limiting order, but merely to distinguish different coil units.

No matter two coil units or three coil units are adopted, effective propagation of signals in multiple directions is guaranteed, and judgment of multiple directions is achieved. Signal communication with the first communication means 3 is achieved.

The power supply end working circuit 2 is a general term for a multi-function circuit, and may include a power supply end resonance compensation circuit 21, a power supply end power conversion circuit 22, a power supply switching circuit 23, and a power supply end signal transceiving circuit 24. Of course, other necessary circuits or structures may be included therein.

The power supply end resonance compensation circuit 21 is connected to each transmitting coil 1, and this is a structure for realizing wireless energy transmission of the transmitting coil 1. And the power supply end electric energy conversion circuit 22 is communicated with the power supply end resonance compensation circuit 21. The power conversion circuit 22 can output a high-frequency alternating current.

The power switching circuit 23 is connected to the power source 0, so that the power source 0 selectively supplies power to the transmitting coil 1. That is, a path is formed between the power supply 0, the power conversion circuit 22, the power supply end resonance compensation circuit 21 and the transmitting coil 1 by the power supply switching circuit 23. The power switching circuit 23 can preferably enable one or several of the first transmitting coils 1 to be powered by the power supply 0.

The position of the power supply switching circuit 23 may be set as appropriate, preferably between the power supply 0 and the power converting circuit 22. In this arrangement, the number of the power conversion circuits 22 and the number of the power supply side resonance compensation circuits 21 are the same as the number of the transmission coils 1. That is, the power switching circuit 23 connects one or more power conversion circuits 22 to the power supply 0 according to different operating conditions, and thus can supply power to the corresponding transmitting coil 1.

The power switching circuit 23 may also be disposed at other positions, for example, between the transmitting coil 1 and the power supply end resonance compensation circuit 21, the power conversion circuit 22 and the power supply end resonance compensation circuit 21 are always powered on, and when the corresponding transmitting coil 1 needs to work, the power switching circuit 23 is used to connect the transmitting coil 1 to the powered power supply end resonance compensation circuit 21.

As described above, the position of the power supply switching circuit 23 is not limited, and the transmitting coil 1 may be selectively powered.

The power supply terminal signal transceiving circuit 24 communicates the first communication device 3 and the power supply switching circuit 23. The power supply terminal signal transceiver circuit 24 receives a signal of the first communication device 3, that is, the first communication device 3 and the second communication device 7 realize signal communication, at this time, the first communication device 3 sends a corresponding signal or instruction to the power supply terminal signal transceiver circuit 24, and the power supply terminal signal transceiver circuit 24 controls the power supply switching circuit 23 according to the received signal or instruction, so that the power supply switching circuit connects and supplies power to the corresponding transmitting coil 1.

The power supply terminal signal transceiver circuit 24 may be integrated with the power supply switching circuit 23, so that the signal of the first communication device 3 can directly control the power supply switching circuit 23. The supply side transceiver circuitry 24 may also be integrated with the first communication means 3 and be part of the first communication means 3, although this is not in contradiction with the "supply side transceiver circuitry 24 communicating with the first communication means 3", i.e. communication may be understood as signal transfer.

It should be noted that the power supply terminal signal transceiver circuit 24 may be a circuit structure having a corresponding function to the power supply switching circuit 23, although the name is "circuit", and it is not limited to only having a circuit, and it may be an electronic device having a corresponding function.

The receiving-side operation circuit 5 is explained below. It includes a receiving end resonance compensation circuit 51, a receiving end electric energy conversion circuit 52 and a receiving end signal transceiving circuit 53.

The receiving end resonance compensation circuit 51 is connected with the receiving coil 4; the receiving-end power conversion circuit 52 is connected between the receiving-end resonance compensation circuit 51 and the load 6. These structures are readily understood for wireless energy transfer.

The receiving-end signal transceiving circuit 53 is connected to the second communication device 7. The receiving-side transceiver circuit 53 may have functions similar to those of the power conversion circuit 22 and the feeding-side resonance compensation circuit 21 in the case of the bit coil of the second communication device 7, so as to enable the second communication device 7 to operate. The second communication device 7 is generally provided with an independent power supply device for supplying power, and for example, when the second communication device is applied to an electric automobile, a vehicle storage battery can be used for supplying power to the second communication device, or an independent battery can be used for supplying power to the second communication device. The second communication means 7 operates in a similar principle to the transmitting coil 1 and delivers an electrical energy signal to the first communication means 3 by electromagnetic induction.

In the dynamic charging process, the number of the transmitting coils 1 and the number of the first communication devices 3 are large, the number of the second communication devices 7 is fixed, so that the parameters of the first communication devices 3 and the transmitting coils 1 are required to be fixed, and the second communication devices 7 and the receiving coils 4 are required to be matched with the first communication devices and the transmitting coils to realize the charging function.

A dynamic charging method, which can be used in the above-described dynamic charging system, is described below.

With reference to fig. 6, the method includes that when at least one first communication device 3 and at least one second communication device 7 are in signal communication, the first communication device 3 that realizes signal communication sends a control signal to the power supply end working circuit 2, and the power supply end working circuit 2 enables the power supply 0 to supply power to the transmitting coil 1 corresponding to the first communication device 3 that realizes signal communication according to the received control signal. The transmitting coil 1 can be wirelessly charged with the receiving coil 4.

After the power supply end working circuit 2 acquires the signal, the power supply 0 supplies power to the first transmitting coil 1 which forms a corresponding relation with the first communication device 3 with the maximum signal communication intensity; the strength of the signal communication between the second communication device 7 and the first communication device 3 is proportional to the distance. The first communication device 3 with the highest signal communication strength is the selected first communication device 3'.

As above, if only the transmitting coil 1 corresponding to the first communication device 3 with the maximum signal communication intensity is powered, the corresponding transmitting coil 1 is selected to operate according to the vehicle position, and if the signal communication intensity is not divided, the transmitting coils 1 corresponding to all the first communication devices 3 that realize signal communication may operate, so that the transmitting coil 1 at the position where the receiving coil 4 is located is in an operating state.

The signal sent by the first communication device 3 to the operating circuit 2 may include all signals communicated when the first communication device 3 and the second communication device 7 are in signal communication.

In a preferred embodiment, since a plurality of transmitting coils 1 are laid along a path, such as for dynamic wireless charging of electric vehicles, vehicles pass through the transmitting coils 1 in sequence, in this case, the first communication devices 3 corresponding to the transmitting coils 1 at both ends of all the transmitting coils 1 can be in an operating state all the time, and the others can be in standby selectively, when one first communication device 3 is in signal communication with the second communication device 7, one or more first communication devices 3 adjacent to the first communication device 3 start operating again, so that the function of reducing energy consumption can be realized.

When any first communication device 3 is in signal communication with a second communication device 7, the first communication device 3 adjacent to the first communication device 3 forming the signal communication is in an operating state, otherwise, the first communication device can be in a standby state. Since there are a plurality of first communication devices 3, it is possible to say that only the first communication device 3 located at the end is set to an operating state when no vehicle passes, for example, dynamic wireless charging of a car, the above-mentioned transmitting coil 1 and the first communication device 3, etc. are laid on a road, generally at will, and in a bidirectional lane, the first communication devices 3 located at the two sides are the end, and it is the first corresponding to a vehicle passing through them. When the vehicle passes by, the first communication device 3 at the end is firstly in signal communication with the second communication device, and at the moment, one or more first communication devices 3 adjacent to the first communication device 3 in signal communication are also activated and are in a working state, and other devices can continue to stand by because the vehicle is not close to the first communication device.

The above is only an alternative way, which can relatively reduce energy consumption. The working state means that the signal communication can be realized when the second communication device 7 approaches, or when the second communication device 7 is in a range capable of signal communication. The standby state is easy to understand, that is, no power consumption or a standby state with a small power consumption is maintained, and the standby state cannot guarantee that the first communicator 3 and the second communicator 7 can normally realize signal communication.

Taking the example of dynamic charging of an automobile as an example, a power supply end is generally installed on a road, and a plurality of transmitting coils 1 are continuously laid to form a dynamic wireless charging channel. A plurality of transmitting coils 1 may be grouped and connected to an input power supply 0 through a power supply switching circuit. When the electric automobile runs, when the vehicle-mounted receiving coil 4 is coupled with one or more transmitting coils 1 on the ground below the vehicle, the transmitting coils 1 are connected with a power supply 0 by a connected circuit for supplying power, so that the transmitting coils start to transmit electric energy, and other transmitting coils 1 are in a closed or standby state.

The receiving-end signal transceiver circuit 53 may include a signal generating circuit (or a signal generator), an amplifying circuit, and a second communication device 7 (the second communication device 7 may adopt a coil structure, and thus may also be referred to as a signal transmitting coil), where the second communication device 7 is installed near the receiving coil 4, such as at a certain position of the chassis of the automobile, or is integrated inside the receiving coil 4, and when integrated inside the receiving coil 4, the second communication device may be disposed above the winding of the transmitting coil 4, or may be located on the side of the winding. The position between the second communication means 7 and the receiving coil 4 is fixed. The second communication device 7 includes more than one coil unit and includes more than one dimension of wound coils, i.e., the above-mentioned three dimensions of XYZ directions.

The power supply terminal signal transceiver circuit 24 includes a first communication device 3, a filter circuit and a signal conversion circuit, the first communication device 3 is installed near the transmitting coil 1, for example, integrated inside the transmitting coil 1, or disposed at a joint between the transmitting coils 1, and when integrated inside the transmitting coil 1, may be disposed above the winding of the transmitting coil 1, or may be disposed at a side of the winding. Similarly to the above, the first communication device 3 includes more than one communicator 31, for example, the communicator 31 made of the above coil, and each of the communicators 31 includes a coil unit wound in more than one dimension.

When the electric vehicle runs along the dynamic wireless charging channel, a signal generating circuit of the receiving end signal transceiver circuit 53 generates a sinusoidal signal or a pulse signal (hereinafter, a sinusoidal signal is taken as an example for description), the signal is sent to an amplifying circuit for power amplification, the amplified sinusoidal signal drives the second communication device 7, a position detection electromagnetic field is excited and emitted to a space below the second communication device 7, and the receiving end signal transceiver circuit 53 is powered by a vehicle-mounted storage battery of the vehicle. The second communication device 7 continuously transmits high-frequency electromagnetic signals, when the signal transmitting coil approaches a certain first communication device 3 which forms a corresponding relation with the transmitting coil 1, the first communication device 3 acquires the high-frequency electromagnetic signals, interference signals are filtered by the filter circuit, and then the signals are converted into signals which can be processed by the controller through the signal conversion circuit, so that the position of the receiving coil 4 is determined.

When the receiving coil 4 enters the position coupled with the transmitting coil 1, the transmitting coil 1 and the circuit thereof are powered, and the automobile is charged wirelessly.

When the position of the electric automobile is determined, the electric parameters such as current, voltage, power or magnetic induction intensity of signals obtained by a position detection electromagnetic field can be sensed, the parameters such as electromagnetic field vectors of the signals can also be detected, the position of the electric automobile is judged according to the magnitude or direction (vector time) of the signal parameters, namely when the signal parameters become large, the electric automobile is close to the position, when one or more signals exceed one set value or a plurality of set values, the starting of coupling between the transmitting coil 1 and the receiving coil 4 can be judged, and the transmitting coil 1 needs to be opened. When the first communication device 3 is two-dimensional or three-dimensional (two or three in operation orientation), it is also possible to judge the positional deviation of the electric vehicle or the air gap between the power coils.

The signal generated by the signal generating circuit of the receiving end signal transceiving circuit 53 can load the binary code of the identity information or the verification information of the vehicle, when the power supply end signal transceiving circuit 24 detects that the code loaded in the electromagnetic field is consistent with the code value preset by the system, the verification is successful, the corresponding vehicle can be charged, otherwise, the power transmission is not started, and the vehicle is not charged.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims

1. A dynamic charging method, comprising:

when at least one first communication device (3) is in signal communication with the second communication device (7), the first communication device (3) realizing the signal communication sends a control signal to the power supply end working circuit (2), and the working circuit (2) enables a power supply (0) to supply power to a transmitting coil (1) which is in corresponding relation with the first communication device (3) realizing the signal communication according to the control signal.

2. Dynamic charging method according to claim 1,

when the first communication device (3) is in signal communication with the second communication device (7), the first communicator (3) with the highest signal communication intensity is used as a selected first communicator (3 '), and the operating circuit (2) enables the power supply (0) to supply power to the transmitting coil (1) corresponding to the selected first communicator (3 ') according to the control signal of the selected first communicator (3 ').

3. Dynamic charging method according to claim 2,

when the first communication device (3) is in signal communication with the second communication device (7), the signal communication strength is related to the distance.

4. Dynamic charging method according to claim 1,

when any of the first communication device (3) and the second communication device (7) are in signal communication, the first communication device (3) adjacent to the first communication device (3) forming the signal communication is in an operating state, otherwise, the first communication device can be in a standby state.

5. Dynamic charging method according to claim 1,

the first communication device (3) has a plurality of communicators (31), each communicator (31) being in signal communication with the second communication device (7) when the first communication device (3) and the second communication device (7) are in signal communication, the distance to the second communication device (7) being determined based on the difference between each communicator (31) when in signal communication.

6. Dynamic charging method according to claim 1,

when the first communication device (3) is in signal communication with the second communication device (7), information is transmitted in a binary mode through electric signals.