CN114884232B

CN114884232B - Wireless power transmission system

Info

Publication number: CN114884232B
Application number: CN202210811833.0A
Authority: CN
Inventors: 陆钧; 王哲; 贺凡波; 葛俊杰; 马俊超; 鲁国希
Original assignee: Hefei Yougan Technology Co ltd
Current assignee: Hefei Yougan Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-09-20
Anticipated expiration: 2042-07-12
Also published as: CN114884232A

Abstract

The invention discloses a wireless power transmission system, comprising: a transmitting module and a receiving module; the transmission module has: the device comprises a laser, a focusing lens and a transmitting end electrode, wherein high-voltage alternating current is conducted to the transmitting end electrode; the receiving module is provided with a receiving end electrode; the transmitting end electrode is provided with a through hole, and the radiation beam emitted by the laser passes through the focusing lens and then passes through the through hole to be emitted to the receiving end. The radiation beam emitted by the laser passes through the focusing lens to form a focused radiation beam, the air is ionized, the conductive channel is made into plasma, a virtual lead is formed, electric energy is transmitted along the conductive channel, and the wireless power transmission function is realized. The transmission efficiency is improved. Compared with photovoltaic conversion power transmission, a photoelectric conversion device is not needed, and energy loss caused by conversion is reduced.

Description

Wireless power transmission system

Technical Field

The invention relates to the field of power transmission, in particular to a wireless power transmission system.

Background

The wireless power transmission is a technology for realizing the air-to-air transmission of electric energy from a power supply side to electric equipment in a non-physical contact mode, and the currently mainstream wireless charging technology is realized by adopting the principle of magnetic field induction or magnetic field coupling resonance, and basically belongs to short-distance wireless charging. The remote wireless charging technology includes microwave/radio frequency and photovoltaic conversion, wherein the microwave/radio frequency can realize remote transmission, but huge space path loss exists in the transmission process, and the transmittable power is small. The prior art of wireless charging based on photovoltaic conversion generally can install photoelectric conversion device at the receiving terminal, converts the received laser into the electric energy through photovoltaic cell etc. but is limited by the lower conversion efficiency of photoelectric conversion device, and the overall transmission efficiency of this kind of mode is not high.

Disclosure of Invention

The present invention provides a wireless power transmission system, including: a transmitting module and a receiving module; the transmission module has: the device comprises a laser, a focusing lens and a transmitting end electrode, wherein high-voltage alternating current is conducted to the transmitting end electrode; the receiving module is provided with a receiving end electrode; the transmitting end electrode is provided with a through hole, and the radiation beam emitted by the laser passes through the focusing lens and then passes through the through hole to be emitted to the receiving end.

Preferably, the transmitting module further has a first metal body connected in series with the transmitting terminal electrode; the receiving module is also provided with a second metal body which is connected with the receiving end electrode in series; the transmitting end electrode and the receiving end electrode are both located between the first metal body and the second metal body.

Preferably, the transmitting module further has an electric energy input port for supplying high-voltage alternating current to the transmitting terminal electrode; the receiving module is also provided with an electric energy output port to output electric energy.

Preferably, the transmitting module is further provided with a transmitting module coil which is connected with the transmitting terminal electrode in series; the receiving module also has a receiving module coil connected in series with the receiving end electrode.

Preferably, the transmitting terminal electrode is provided with high-voltage alternating current by a first transformer, and the transmitting module coil is used as the coil on the output side of the first transformer.

Preferably, the receiving terminal electrode outputs electric energy to a load through a second transformer, and the receiving module coil is used as a coil on the input side of the second transformer.

Preferably, the first metal body and the second metal body are spherical bodies, annular bodies, or polyhedrons.

Preferably, high-voltage alternating current with a voltage value larger than 1kV is loaded to the transmitting terminal electrode.

Preferably, the radiation beam emitted by the laser forms a plasmatized electrically conductive path between the emitting end and the receiving end.

Preferably, the emission module further has a reflection unit for reflecting the radiation beam emitted from the laser into the through hole of the emission terminal electrode.

In the application, a radiation beam emitted by a laser forms a focused radiation beam through a focusing lens, air is ionized, a conductive channel is made into plasma, a virtual lead is formed, electric energy is transmitted along the conductive channel, and a wireless power transmission function is achieved. The electric conduction channel formed by plasma has small resistance, so that the consumption in the transmission process is reduced, and the transmission efficiency is improved. Compared with photovoltaic conversion power transmission, a photoelectric conversion device is not needed, and energy loss caused by conversion is reduced.

Drawings

Fig. 1 is a schematic diagram of the basic structure of a wireless power transmission system according to the present invention;

FIG. 2 is a diagram of a wireless power transmission system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of another embodiment of a wireless power transmission system of the present invention;

fig. 4 is a partial equivalent circuit diagram of a wireless power transmission system of the present invention;

fig. 5 is an equivalent circuit diagram of another part of the wireless power transmission system of the present invention.

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 wireless power transmission system, which is shown in figure 1 and comprises: a transmitting module 13 and a receiving end 23.

The transmission module 13 has: the laser 132, the focusing lens 134 and the transmitting end electrode 131, wherein high-voltage alternating current is conducted to the transmitting end electrode 131; the receiving module 23 has a receiving terminal electrode 231; the transmitting electrode 131 has a through hole, the radiation beam emitted by the laser 132 passes through the focusing lens 134 and then through the through hole to the receiving end, and a conductive channel 130 is formed between the transmitting module 13 and the receiving module 23 for wireless transmission of electrical energy. The conductive path 130 is formed by the radiation beam emitted by the laser 132 focused by the focusing lens 134, and the forming principle will be described in detail below.

For convenience of explanation, we will refer to the side supplying power as a transmitting end, of which the transmitting module 13 is a part; similarly, the side receiving the power is the receiving end, and the receiving module 23 is a part of the receiving end.

The transmitting module 13 has a power input port 136 for supplying a high voltage ac power to the transmitting terminal electrode 131. It can be connected directly to the power supply 11 or to other power supply units. The voltage value of the high-voltage alternating current loaded on the transmitting terminal electrode is more than 1 kV.

When the power source 11 is directly connected to the power input port 136, it means that the power source 11 is a high voltage ac power according to the requirement.

An embodiment of another power supply unit is described below, which supplies power to the emitter electrode 131 via the first transformer. In this embodiment, the transmitting terminal also has a transmitting circuit 12, and the transmitting module 13 also has a transmitting module coil N2 connected in series with the transmitting terminal electrode 131.

The power source 11 provides power, which is processed by the transmitting circuit 12 to meet the power demand of the transmitting electrode 131. That is, the power supply 11 in this embodiment can be selected from a wide range, for example, using the commercial power directly.

The transmission circuit 12 includes a rectifier converter 121, an inverter 122, a transmission compensation network 123, and a first coil N1. Of course, a controller, sensor, etc. (not shown in the figures) may also be included.

The first coil N1 and the transmit module coil N2 are coupled to form a first transformer structure, the first coil N1 being the input side coil of the first transformer, the transmit module coil N2 being the output side coil of said first transformer. The number of turns of the first coil N1 is less than that of the transmitting module coil N2, that is, the first transformer is a step-up transformer, and the power of the power supply 11 is boosted and applied to the transmitting terminal electrode 131. It is noted that the transmitter module coil N2, in addition to being part of a transformer, will be described in further detail below.

The working principle is as follows: the power frequency alternating current output by the power supply 11 is filtered, rectified and power factor-adjusted by the rectifier converter 121 and then converted into direct current, and the direct current is converted into high frequency alternating current by the inverter 122 and then input into the first coil N1 through the emission compensation network 123 to generate an alternating magnetic field. The transmitter module coil N2 is located outside the first coil N1 or coaxial with the first coil N1 in a close coupled relationship.

The first coil N1 and the transmitting module coil N2 may have a restricted diameter relationship in addition to the above-described turn number relationship. The diameters of the first coil N1 and the emitting module coil N2 are R1 and R2 respectively, wherein R1 is more than or equal to R2; when the coils of the first coil N1 and the transmit module coil N2 are coaxial, i.e. the transmit module coil N2 is inserted into the first coil N1, when R1 < R2, or when two coils are wound together in parallel, then R1= R2. The magnetic flux of the alternating magnetic field generated by the first coil N1 is directed through the transmit module coil N2, generating an alternating induced voltage in the transmit module coil N2 and causing a flowing current in the transmit module coil N2. The number of turns N1 of the transmitting module coil N2 is greater than the number of turns of the first coil N1, i.e. there is a high voltage transformation ratio between the two coupled coils, so that the induced alternating current in the transmitting module coil N2 is higher than the voltage of the first coil N1.

Similar to the transmit side, the receive side has a power output port 236. The electric power utilization device can be directly connected with electric equipment, and can also be output after being sorted by other processing circuits.

An alternative consolidated output scheme is described below, with power being output through a second transformer.

In such an embodiment, the receiving end also has a receiving circuit 22. The receiving circuit 22 has a filter 221, a dc converter 222, a reception compensation network 223, and a third coil N3. Of course, a controller, sensor, etc. (not shown in the figures) may also be included. The receiving module 23 also has a receiving module coil N4 connected in series with the receiving end electrode 231.

The third coil N3 and the receive module coil N4 are coupled to form a second transformer. The number of turns of the third coil N3 is smaller than the number of turns of the receiving module coil N4, i.e. the second transformer is a step-down transformer, the third coil N3 serves as the input side coil of the second transformer, and the receiving module coil N4 serves as the output side coil of the second transformer. The function of the receive module coil N4 will be described below in addition to its function as part of the second transformer.

The working principle is as follows: the high frequency ac current from the transmitter module coil N2 flows through the conductive path 130 to the receiver module coil N4, which in turn generates an alternating magnetic field at the receiver module coil N4. The third coil N3 is located outside of the receive module coil N4 or coaxial with the receive module coil N4. the third coil N3 is in close-coupled relationship with the receive module coil N4, the number of turns relationship being as described above. The diameter of the receiving module coil N4 is less than or equal to that of the coil of the third coil N3, namely R3 is more than or equal to R4; when the coil loop of the receive module coil N4 is coaxial with the coil loop of the third coil N3, i.e., the receive module coil N4 is inserted into the third coil N3 with R3 > R4, or the two coils are wound together in parallel, then R3= R4. The magnetic flux of the alternating magnetic field generated by the receiving module coil N4 is directed through the third coil N3, generating an alternating induced voltage in the third coil N3 and causing a flowing current in the third coil N3, the voltage of the induced alternating current in the third coil N3 being low relative to the receiving module coil N4.

The output of the third coil N3 is connected to the receiving circuit 22. The low-voltage induction alternating current output by the third coil N3 is transmitted to the direct current converter 222 and the filter 221 through the receiving compensation network 223, then converted into direct current, and then transmitted to the load 21 for power supply.

In some embodiments, the transmitting module 13 further has a first metal body 133 connected in series with the transmitting terminal electrode 131 to form a first loop, or in some embodiments, the transmitting terminal electrode 131, the transmitting module coil N2 and the first metal body 133 are connected in series to form a first loop.

The receiving module 23 further has a second metal body 233, the second metal body 233 and the second metal body 233 are connected in series to form a second loop, or the receiving module coil N4, the second metal body 233 and the second metal body 233 are connected in series to form a second loop.

And a transmitting terminal electrode 131 and a receiving terminal electrode 231 between the first metal body 133 and the second metal body 233. Each of the first metal body 133 and the second metal body 233 has a large conductor surface area and is generally formed in the form of a sphere, a ring, a polyhedron, or the like. The functions and effects of the first and

second metal bodies

133 and 233 will be described in detail below.

How the power is transferred is explained in detail below.

The transmission of electrical energy requires the formation of a "physically free" plasmatized conductive path 130 through the cooperation of a laser 132 or the like.

The operation of the laser 132 requires power input, which may be directly from the power source 11 (connection is not shown), or may be an independent power source.

Laser 132 emits a beam of radiation having, in its path, a focusing lens 134. The focusing lens 134 focuses the radiation beam to a focused radiation beam, and then the focused radiation beam passes through the through hole of the transmitting end electrode 131 and propagates toward the receiving end electrode 231, so as to be received by the receiving end electrode 231. The diameter of the through hole of the emitter electrode 131 is not smaller than the diameter of the focused radiation beam. The path of the radiation beam or the focused radiation beam is the conductive path 130.

The position at which the laser 132 is positioned can be adjusted as desired. Two alternative location options are described below.

First position selection, as shown in FIG. 2, the focusing lens 134 is between the laser 132 and the emitter electrode 131, and the emission direction of operation of the laser 132 is toward the focusing lens 134 and the emitter electrode 131. At least the transmitting end electrode 131, the focusing lens 134, and the receiving end electrode 231 are coaxially disposed.

Second position selection, as shown in fig. 3, the laser 132 is not directed toward the focusing lens 134 and the emitter electrode 131, but is reflected by the reflection unit 135. The radiation beam emitted by the laser 132 is reflected by the reflection unit 135 and passes through the focusing lens 134.

The two setting modes have the same working principle.

The emitter electrode 131 and the receiver electrode 231 are preferably made of a refractory metal such as titanium or a refractory conductive nonmetal such as graphite.

In the first position selection, the laser 132, the focusing lens 134 and the emitter electrode 131 are externally provided with a housing made of a high voltage insulating material, so that an electric field generated when a high voltage is applied to the first metal body 133 can be isolated. The laser 132, the emitter electrode 131, and the focusing lens 134 may be mounted together with the first metal body 133, and the high voltage may be isolated therebetween in the form of an insulating material case or the like.

In the second position selection, the reflection unit 135, the focusing lens 134 and the emitter electrode 131 are externally provided with a housing made of a high voltage insulating material, so as to isolate an electric field generated when the first metal body 133 is applied with a high voltage. Since the position of the laser 132 is less affected by the above-mentioned electric field in this manner, a housing made of a high-voltage insulating material may not be used, and may of course be used. An insulating material is also disposed between the receiving electrode 231 and the second metal body 233 to isolate the high voltage, so as to isolate the electric field generated when the second metal body 233 is applied with the high voltage.

The housing at the position of the through hole of the emitter electrode 131 has a transparent window, which is at least transparent to the focused radiation beam, i.e. does not obstruct the focused radiation beam from passing through the window, so that the focused radiation beam can be emitted out through the window, which can be made of an insulating material such as glass or transparent plastic, and is typically coated with an anti-reflection coating.

The radiation beam emitted by the laser 132 is a femtosecond laser, i.e. the radiation beam is emitted in pulses with a duration of femtoseconds (10) ^-15 Second or so) and the power of the radiation beam emitted by the laser 132 is set to be greater than the autofocus critical power P and has a value of P =3.77 λ ² /（8πn ₀ n ₂ ) Wherein n is ₀ Is the linear refractive index of the medium, n ₂ Representing the medium's nonlinear refractive index (also known as the Kerr coefficient), λ being the central wavelength of the emitted radiation beam. For example, laser 132 emits a radiation beam having a center wavelength of 800nm, a laser pulse width of 100 femtoseconds, and a linear refractive index n of air ₀ 1, nonlinear index of refraction coefficient n of air ₂ =3.2*10 ^-23 m ² W, it is possible to obtain a critical power P of the autofocus system of about 3 x 10 ⁹ W is added. When the femtosecond laser is transmitted in air, the laser generates a nonlinear optical kerr effect in an air medium when the radiation beam is converged (focused) to a certain small size by the focusing lens 134. Nonlinear lightThe optical kerr effect acts on the beam transport as if a positive lens were inserted in the optical path, giving a further converging effect to the focused radiation beam, the so-called self-focusing effect.

The self-focusing effect makes the peak power density of the beam rise sharply, and when the power of the radiation beam output by the laser exceeds the self-focusing critical power P, the light intensity of the focused radiation beam is more than 10 ¹⁴ W/cm ² At this high light intensity, the air in the conductive channel 130 will be ionized, and high concentration of electrons and charged ions will be generated, i.e. the conductive channel 130 is plasmized.

On the other hand, there are processes such as collision and electron recombination between the plasmas, and the effect on the transmission of the focused radiation beam is equivalent to inserting a negative lens in the optical path to make the focused radiation beam diverge, i.e. the so-called defocusing effect. When the balance is achieved between the self-focusing process and the plasma defocusing process of the plasma, the distribution of the focused radiation beam on the time space is relatively stable, a plasma beam which propagates in a longer distance is formed, and the high energy and transient structure of the plasma beam can be kept unchanged during the long-distance transmission process.

The diameter of the plasma beam is generally about 40-200 μm, and the electron density in the plasma beam reaches 10 on average ¹⁴ ~10 ¹⁸ /cm ³ The resistance per unit length of the plasma beam is 3.6 x 10 ⁵ ~6.4*10 ⁷ Between omega/m compared with air resistance (10) ¹³ ~10 ¹⁵ Ω/m) by at least 6 orders of magnitude, and thus the plasmatized conductive path 130 can be considered as a cylindrical "virtual wire".

The sheath of the plasma is a transition region formed between the wall or the electrode when the plasma is in contact with the wall or the electrode, and forms a sheath with the transmitting electrode 131 when the focused radiation beam passes through the through hole of the transmitting electrode 131, and also forms a sheath with the receiving electrode 231 at the receiving end. For convenience of understanding, it is considered that the sheath layer is in contact with the corresponding transmitting terminal electrode 131 and receiving terminal electrode 231, and contact resistance is generated at both the receiving terminal and the transmitting terminal. The contact resistances at both ends, together with the focused radiation beam (plasma beam), conduct air between the two electrodes (emitter electrode 131 and receiver electrode 231).

When a voltage is applied to the transmitter electrode 131, an alternating high potential difference exists between the transmitter electrode 131 and the receiver electrode 231, so that a current flow occurs in the focused radiation beam (plasma beam) from the transmitter electrode 131 to the receiver electrode 231, and the conductive channel 130 serves as a path for power transmission from the transmitter electrode 131 to the receiver electrode 231, thereby realizing wireless power transmission.

The equivalent resistance of the focused radiation beam (plasma beam) decreases with increasing voltage applied to the emitter electrode 131, which improves the conductivity of the channel. In order to improve the transmission capability of the conductive path 130, the voltage applied to the transmitting electrode 131 is at least 1kV, and generally 10kV-220 kV.

The focused radiation beam is formed based on a femtosecond pulsed beam, and due to recombination of electrons and ions, adsorption of electrons and neutral molecules, and the like, after a certain time, the electron density rapidly decreases, and the plasma beam decays after a certain distance of propagation to disappear, so that the laser 132 is configured to emit the radiation beam in a pulsed manner with a pulse gap equal to or less than the decay time of the plasma. The decay of the previous plasma beam will produce the next laser pulse beam, and the plasma beams occurring at various times remain coupled to each other so that electrical energy can be continuously transmitted from the emitter electrode 131 to the receiver electrode 231 through the conductive path 130.

It will be explained that the transmitting module coil N2 and the receiving module coil N4 function to form a resonant tank in addition to being part of the respective transformers. I.e. both the first and second loops described above are resonant loops.

Fig. 4 is a partial equivalent circuit diagram of the wireless power transmission system of the present invention, which mainly comprises a first loop, a second loop and a conductive path 130, wherein LA and LB are self-inductances of the transmitting module coil N2 and the receiving module coil N4, respectively, and CA is a total capacitance value of the first loop, which includes capacitances between turns of the transmitting module coil N2, and, in the case where the first metal body 133 is provided, also includes an equivalent capacitance value between the first metal body 133 and the conductive path 130. Similarly, CB is the total capacitance of the second loop, which includes the capacitance between the turns of the coil N4 of the receiving module, and in the case of the second metal body 233, the equivalent capacitance between the second metal body 233 and the conductive path 130.

RA is the total resistance value in the first loop, including the equivalent resistance value of the transmit module coil N2; RB is the total value of the resistance in the second loop, including the equivalent resistance of the receive module coil N4.

CA and CB as described above ignore other stray capacitance values in the circuit.

An RLC resonant loop is formed among the RA, CA and LA, that is, the above mentioned principle that the first loop is a resonant loop. RB, CB, LB form an RLC resonant tank, i.e. the above mentioned principle that the second tank is a resonant tank. The two resonant tanks are connected by a conductive path 130. The calculation formulas of the natural resonant frequencies of the two resonant circuits are respectively as follows:

，

the two resonant circuits are configured to have the same natural resonant frequency, that is, by configuring the inductance and capacitance values of the transmitting module coil N2 and the receiving module coil N4, the natural frequency fB of the resonant circuit (second circuit) at the receiving end is the same as the natural frequency fA of the resonant circuit (first circuit) at the transmitting end, and the oscillation frequency of the high-frequency alternating current generated by the transmitting end and coupled to the transmitting module coil N2 is also the same as fA and fB.

Through the arrangement, resonance is generated at the transmitting end and the receiving end, and energy transmission with higher efficiency is realized. When the two first and second loops are in resonance state, respectively, the whole is equivalent to resistive state, and when the resonance frequency of the two loops is the same, the imaginary part of the impedance of the equivalent circuit formed from the power source 11 to the load 21 is equal to zero or nearly equal to zero, and the maximum transmission efficiency and/or the maximum transmission power are/is obtained during the electric energy transmission. It should be appreciated that power transfer is also possible without the use of the transmitting module coil N2, when the power source 11 is used directly to supply power through the power input port 136, or the like, and the power is output directly through the power output port 236 without the use of the receiving module coil N4, but with lower efficiency and greater power loss than the above-described two resonant circuits.

It should be noted that the above-mentioned embodiment of using the second winding N2 as a part of the first transformer and the second winding N2 as the first loop is a preferred embodiment. Other solutions, such as directly using the power source 11 to supply the transmitting terminal electrode 131 through the power input port 136, do not have the first transformer, but the second coil N2 may be separately present to form the first loop. The first transformer may also be used alone to supply the transmitting terminal electrode 131 with power, and the coil on the output side of the first transformer does not participate in the first loop.

Similarly, the third winding N3 does not necessarily form the second transformer, nor does it necessarily participate in forming the second loop.

The transmitting end and the receiving end are respectively provided with a compensating circuit (a transmitting end compensating network 123 and a receiving end compensating network 223), and are respectively provided with a controller and a sensor for realizing control of data acquisition, and the like.

When alternating induced alternating current is generated in the transmitter module coil N2, the induced voltage is also applied to the first metal body 133 to form a potential difference with respect to the second metal body 233, and the first metal body 133 and the second metal body 233 act as a coupling capacitor, and an alternating high-voltage electric field exists in the space between the first metal body 133 and the second metal body 233. Since the conductive path 130 is located between the first metal body 133 and the second metal body 233, under the action of the applied electric field (high voltage electric field between the two metal bodies), impact ionization of the plasma beam is enhanced, adsorption is relatively weakened, plasma recombination is suppressed as the average energy of electrons increases, which contributes to further prolonging the lifetime of the plasma beam, and the enhancement of the plasma beam by the external voltage becomes better as the voltage increases, and increases slowly or stops after a certain limit value.

On the other hand, fig. 5 is an equivalent circuit diagram of another part of the wireless power transmission system of the present invention, which mainly comprises a transmitting module coil N2, a receiving module coil N4, a first metal body 133, a second metal body 233 and a conductive path 130. The transmitting module coil N2 and the receiving module coil N4 are connected through the conductive channel 130, the transmitting module coil N2 and the receiving module coil N4 are connected in series to form a series inductor, a coupling capacitor exists between the first metal body 133 and the second metal body 233, other stray inductors and capacitors are ignored, an LC resonance circuit is also constructed by the series inductor and the coupling capacitor, energy in the circuit is continuously exchanged between the series inductor and the coupling capacitor according to the characteristics of the resonance circuit, reactive power in the whole circuit is mutually offset, and the reactive internal resistance of the conductive channel cannot cause extra power loss, so that the high efficiency of energy transfer of the conductive channel is ensured.

The above is the function of the first metal body 133 and the second metal body 233.

The structure can also be used for wireless power transmission of mobile equipment such as an unmanned aerial vehicle or a moving vehicle, and the like, only by installing the receiving end on the mobile equipment, the transmission direction of the radiation beam generated by the control laser and the like can be controlled, so that the radiation beam can be received by the receiving end electrode arranged on the mobile equipment, and the electric energy can be transmitted to the mobile equipment along the conductive channel to supply power for mobile power loads such as the unmanned aerial vehicle and the like.

Compared with the existing wireless energy transmission scheme, the electric energy transmission method based on the plasma conductive channel 130 can overcome energy loss in a transmission space path from a principle mechanism level, can provide high-power supply and improve system transmission efficiency, and realizes long-distance direct transmission of electric energy.

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 wireless power transmission system, comprising:

a transmitting module (13) and a receiving module (23);

the transmission module (13) has: the laser device comprises a laser (132), a focusing lens (134) and an emitting end electrode (131), wherein high-voltage alternating current is conducted on the emitting end electrode (131);

the receiving module (23) has a receiving terminal electrode (231);

the transmitting end electrode (131) is provided with a through hole, and a radiation beam emitted by the laser (132) passes through the focusing lens (134) and then passes through the through hole to be emitted to the receiving end;

the transmitting module (13) further has a first metal body (133) connected in series with the transmitting terminal electrode (131);

the receiving module (23) is also provided with a second metal body (233) which is connected with the receiving end electrode (231) in series;

the transmitting end electrode (131) and the receiving end electrode (231) are both located between the first metal body (133) and the second metal body (233).

2. The wireless power transmission system according to claim 1,

the transmitting module (13) is also provided with an electric energy input port (136) for supplying high-voltage alternating current to the transmitting end electrode (131);

the receiving module (23) also has a power output port (236) to output power.

3. The wireless power transmission system according to claim 1,

the transmitting module (13) further has a transmitting module coil (N2) connected in series with the transmitting terminal electrode (131);

the receiving module (23) further has a receiving module coil (N4) connected in series with the receiving terminal electrode (231).

4. The wireless power transmission system according to claim 3,

the transmitting terminal electrode (131) is provided with high-voltage alternating current by a first transformer, and the transmitting module coil (N2) is used as a coil on the output side of the first transformer.

5. The wireless power transmission system according to claim 3,

the receiving terminal electrode (231) outputs electric energy to a load from a second transformer, and the receiving module coil (N4) is used as a coil of the input side of the second transformer.

6. The wireless power transmission system according to claim 1,

the first metal body (133) and the second metal body (233) are spherical, annular, or polyhedral.

7. The wireless power transmission system according to claim 1,

and loading high-voltage alternating current with the voltage value larger than 1kV to the transmitting terminal electrode (131).

8. The wireless power transmission system according to claim 1,

the radiation beam emitted by the laser (132) forms a plasmatized conductive channel (130) between the emitting end and the receiving end.

9. The wireless power transmission system according to claim 1,

the emitting module (13) further has a reflecting unit (135) for reflecting the radiation beam emitted by the laser (132) into the through hole of the emitting terminal electrode (131).