A wireless energy encryption transmission method using inductive tuning

Abstract

The application discloses a wireless energy encryption transmission method adopting inductance tuning, relates to the technical field of wireless energy transmission, and comprises a transmitting end and a receiving end; the transmitting end comprises a resonant transformer, an adjustable resonant inductor, a resonant capacitor and a transmitting coil; the receiving end comprises a receiving coil, an adjustable resonant inductor, a resonant capacitor and a resonant transformer. The application introduces the adjustable resonant inductor in parallel into a series-series resonant network structure, has good stability when coping with load and mutual inductance deviation, can improve the sensitivity of the resonant frequency of the circuit to the inductance value, expand the jump range of the working frequency of the system, and is favorable to improving the effect of energy encryption transmission. The application adopts inductance tuning, simplifies the structure and control method of the capacitive tuning type wireless energy transmission system, adopts encrypted wireless communication, guarantees the communication speed, avoids unauthorized receiving end from stealing frequency hopping information, and improves the reliability of the encryption system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wireless energy transmission, in particular to a wireless energy encryption transmission method using inductive tuning. BACKGROUND

[0002] With the continuous development of wireless energy transmission technology, it is gradually introduced into the field of electric vehicles. Compared with the traditional replacement of vehicle-mounted batteries or charging pile charging mode, the wireless charging mode has the advantages of saving time and space. Wireless charging of electric vehicles is realized by relying on magnetic coupling resonant wireless energy transmission technology. This technology is based on the principle of near-field resonance strong coupling: if two objects have the same resonant frequency, efficient energy exchange can be achieved between them, and if their resonant frequencies are inconsistent, the energy exchange is weak. Therefore, in order to ensure the energy transmission efficiency, the working frequency of the system is required to be in the resonant or quasi-resonant state, that is, the switching frequency of the inverter is equal to or close to the resonant frequency of the resonant network. If this condition cannot be met, the energy transmission efficiency will decrease sharply.

[0003] The wireless energy transmission system is divided into a transmitting end and a receiving end. The coil of the receiving end is located in the vehicle body, and the coil of the transmitting end is laid under the highway or parking lot. The transmitting coil often covers a large area, so any receiving coil located in the transmitting coil area can obtain the energy of the transmitting end through the mutual inductance of the coil. In this context of indiscriminate power supply, it is difficult to distinguish whether the receiving end is authorized or not in the parking lot or on the highway, and the management of the charging vehicles faces great difficulties. Wireless charging technology is difficult to realize commercialization.

[0004] Because the transmission efficiency of the wireless charging system has significant resonant frequency sensitivity, energy encryption transmission can be realized through frequency hopping mode: by constantly changing the working frequency of the transmitting end, only the authorized receiving end that knows the frequency hopping rule can obtain energy, and other non-authorized receiving ends will not or rarely obtain energy. According to the differences between the transmitting end and the receiving end resonant network, there are four types of wireless energy transmission circuits: series-series, series-parallel, parallel-series and parallel-parallel. In order to be able to realize frequency hopping, a tuning module needs to be introduced into the circuit. On the basis of the above wireless energy transmission circuit structure, in order to meet the wireless encryption charging of electric vehicles, avoid indiscriminate power supply of the transmitting end, and improve the distinction degree of whether the receiving end is authorized or not, it is necessary to study a resonant network structure with high frequency sensitivity and good tuning effect.

[0005] The resonant network of wireless energy transmission system is composed of capacitance and inductance, so there are two means of capacitance tuning or inductance tuning to realize frequency hopping. There have been some research results on the application of tuning technology in wireless energy encryption transmission system at home and abroad, such as realizing discrete capacitance tuning through switch capacitor array (Z. Zhang, K. T. Chau, C. Qiu, et al, Energy Encryption for Wireless Power Transfer[J], IEEE Transactions on Power Electronics, 2015, 30(9):5237-5246.), multi-load wireless energy directional transmission system based on capacitance adjustment unit (CN104617680A), virtual capacitance technology (CN106972648A), system impedance adjustment technology (Ai Wenjie. Research on impedance adjustment technology of wireless energy transmission system based on energy encryption[D]. Tianjin University, 2018.) and so on.

[0006] However, switch capacitor or virtual capacitor is composed of a group of switch capacitor array and corresponding switch devices. The number of capacitors connected in parallel to the resonant network is changed by switch switching to change the resonant frequency of the system, so there are problems of multiple capacitors and switch devices and complex control. Inductance tuning has the advantages of small size, smooth adjustment, independent control circuit and main circuit, and is more advantageous in wireless energy encryption transmission.

[0007] In addition, in terms of information encryption, researchers have proposed two-dimensional encryption means of frequency and period (Z. Zhang, K. T. Chau, C. Liu, et al, Energy-security-based contactless battery charging system for roadway-powered electric vehicles[C], 2015IEEE PELS Workshop on Emerging Technologies: Wireless Power (2015WoW), 2015:1-6.), spread spectrum technology (Yang Zengqi. Research on wireless energy encryption transmission system based on spread spectrum technology[D]. Zhengzhou University, 2018.), chaos theory (Du Jiaxing. Research on energy encryption technology of wireless power transmission system with three-coil structure[D]. Anhui University of Technology, 2019.) and other methods to generate frequency hopping information and encrypt it. However, there is still no relevant research and conclusion on the mode of information encryption interaction, therefore, in order to improve the wireless energy encryption transmission system applied to electric vehicle encryption charging, it is necessary to propose a method of encryption information interaction to ensure that the unauthorized receiving end cannot steal the frequency hopping rule in the wireless communication link of the authorized end and the transmitting end. SUMMARY

[0008] To solve the problems mentioned in the background, the purpose of the present application is to provide a wireless energy encryption transmission method using inductance tuning. By introducing a parallel tunable resonant inductance into a series-series resonant network structure, the method not only has good stability when dealing with load and mutual inductance deviation, but also can improve the sensitivity of the circuit resonant frequency to the inductance value, expand the jump range of the system operating frequency, and improve the effect of energy encryption transmission.

[0009] The present application simplifies the structure and control method of the capacitive tuning type wireless energy transmission system by using inductance tuning.

[0010] The present application uses encrypted wireless communication to ensure communication speed while avoiding unauthorized receiving end from stealing frequency hopping information, improving the reliability of the encryption system.

[0011] The purpose of the present application can be achieved by the following technical solutions:

[0012] A wireless energy encryption transmission method using inductance tuning, comprising a transmitting end and a receiving end, the transmitting end comprising a resonant converter, a tunable resonant inductance, a resonant capacitor and a transmitting coil, the receiving end comprising a receiving coil, a tunable resonant inductance, a resonant capacitor and a resonant converter, the tunable resonant inductance and the resonant capacitor forming a parallel resonant network in the transmitting end, and the tunable resonant inductance and the resonant capacitor forming a parallel resonant network in the receiving end.

[0013] The clear frequency hopping data of the transmitting end is formed into ciphertext by an encryption algorithm and sent to the receiving end in a wireless manner, and the decrypted frequency hopping data is obtained by a decryption algorithm in the receiving end. The tunable resonant inductance in the transmitting end and the receiving end resonant network is synchronously controlled by the frequency hopping controllers in the transmitting end and the receiving end, respectively, to ensure that the resonant converters at both ends work in a mode of frequency synchronization jump and the transmitting end and the receiving end are always in a resonant working state, realizing the encryption transmission of energy.

[0014] Further, the transmitting end and the receiving end transmit the frequency hopping data through encryption, and the secret transmission of the frequency hopping data information is realized through a wireless signal channel. Specifically, the receiving end generates a public key and a private key using the RSA algorithm, and sends the public key to the transmitting end. After receiving the public key, the transmitting end generates an AES key and an AES key encrypted by the public key using the RSA algorithm, and sends the AES key encrypted by the public key to the receiving end through the wireless signal channel. The transmitting end encrypts the plaintext frequency hopping data using the AES algorithm combined with the AES key, generates ciphertext, and sends the ciphertext to the receiving end. The receiving end sends the received AES key encrypted by the public key and the private key generated by the RSA algorithm to the RSA algorithm at the same time, obtains the AES key, and processes the ciphertext using the AES algorithm combined with the AES key to obtain the decrypted plaintext frequency hopping data.

[0015] Further, in the frequency hopping controller, the frequency hopping data is given and the current and voltage feedback quantities are given, the controller calculates and obtains the control instruction of the PWM converter, and the control coil L c The circulating direct current I dc , so as to realize the inductance value adjustment of the adjustable resonant inductor L r , that is, the adjustable resonant inductor corresponding to the transmitting end and the adjustable resonant inductor corresponding to the receiving end , the adjustable resonant inductor in the parallel resonant network is adjusted according to the frequency hopping data (the resonant frequency is and ), the , are the adjustable resonant inductors of the transmitting end and the receiving end, the , are the resonant capacitors of the transmitting end and the receiving end, and the switching frequency of the resonant converter of the transmitting end and the receiving end is adjusted to be consistent with the resonant frequency of the parallel resonant network, so that the same processing resonant working mode of the two is realized.

[0016] Further, the receiving end requests charging (that is, the public key) from the transmitting end through a mobile phone scanning code or a control terminal, the transmitting end detects the balance or payment information after receiving the request, confirms the transmission, sends the encrypted frequency hopping data (that is, the ciphertext) and the AES key encrypted by the public key, and authorizes the receiving end to perform energy transmission, so as to prevent unauthorized receiving ends from illegally stealing energy. The wireless communication means for transmitting encrypted information of the transmitting end and the receiving end includes WiFi, 2G / 3G / 4G / 5G wireless network, zigbee, Bluetooth, IoT network, and is suitable for parking lot charging and wireless charging expressway of electric vehicles.

[0017] Further, the encrypted transmission of the ciphertext and the key adopts a separate AES algorithm or a separate RSA algorithm or a combination of the AES algorithm and the RSA algorithm.

[0018] Further, the inductance adjustment capability is improved by adopting permanent magnet bias and magnetic circuit optimization design.

[0019] Advantages of the present application:

[0020] 1. The present application introduces parallel adjustable resonant inductance into series-series resonant network structure, which not only has good stability when coping with load and mutual inductance offset, but also can improve the sensitivity of resonant frequency of the circuit to inductance value, expand the jump range of system working frequency, and is beneficial to improving the effect of energy encryption transmission.

[0021] 2. The present application simplifies the structure and control method of the capacitive tuning type wireless energy transmission system by adopting inductance tuning.

[0022] 3. The present application adopts encrypted wireless communication, which guarantees the communication speed while avoiding unauthorized receiving end from stealing frequency hopping information, and improves the reliability of the encryption system. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in conjunction with the drawings.

[0024] Figure 1 It is a structure schematic diagram of the wireless energy encryption transmission system of the present application.

[0025] Figure 2 It is a wireless encryption communication flow schematic diagram.

[0026] Figure 3 It is a schematic diagram of adjustable resonant inductance device.

[0027] Figure 4 It is a resonant network structure diagram of the wireless energy transmission system.

[0028] Figure 5 It is a resonant network schematic diagram of inductance tuning.

[0029] Figure 6 It is a frequency sensitivity schematic diagram of system transmission efficiency.

[0030] Figure 7 It is an application schematic diagram of the wireless energy encryption transmission system.

[0031] In the drawings: 1, transmitting end resonant changer; 2, transmitting end adjustable resonant inductance; 3, transmitting end resonant capacitor; 4, transmitting coil; 5, receiving coil; 6, receiving end adjustable resonant inductance; 7, receiving end resonant capacitor; 8, receiving end resonant changer. DETAILED DESCRIPTION

[0032] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] A wireless energy encryption transmission method using inductive tuning, comprising Figure 1 It is known that: a wireless energy encryption transmission method using inductive tuning, characterized by: comprising a transmitting end and a receiving end two independent parts, the transmitting end includes resonant converter 1, adjustable resonant inductor 2, resonant capacitor 3 and transmitting coil 4, the receiving end includes resonant converter 8, adjustable resonant inductor 6, resonant capacitor 7 and receiving coil 5, adjustable resonant inductor 2 and resonant capacitor 3 form the transmitting end parallel resonant network, adjustable resonant inductor 6 and resonant capacitor 7 form the receiving end parallel resonant network.

[0035] In the transmitting end, the plaintext frequency hopping data is formed into ciphertext by encryption algorithm, and is sent to the receiving end in a wireless manner, and the decrypted frequency hopping data is obtained by the decryption algorithm of the receiving end, and the adjustable resonant inductor in the transmitting end and the receiving end resonant network is synchronously controlled by the frequency hopping controller of the transmitting end and the receiving end, respectively, to ensure that the resonant converters at both ends work in the mode of frequency synchronization jumping and the transmitting end and the receiving end are always in the resonant working state, so as to realize the encrypted transmission of energy.

[0036] Figure 2 It is a wireless encryption communication flowchart, the receiving end generates a public key and a private key by using RSA algorithm, and sends the public key to the transmitting end; after receiving the public key, the transmitting end generates an AES key and an AES key encrypted by the public key by using RSA algorithm, and sends the AES key encrypted by the public key to the receiving end through the wireless signal channel, and the receiving end sends the AES key encrypted by the public key and the private key generated by the RSA algorithm into the RSA algorithm at the same time, and decrypts to obtain the AES key. After the AES key is exchanged between the transmitting end and the receiving end by means of the RSA algorithm, the transmitting end starts to encrypt the plaintext frequency hopping data by using the AES algorithm combined with the AES key, sends the ciphertext to the receiving end after generating the ciphertext; the receiving end can process the ciphertext by using the AES algorithm combined with the AES key, and obtain the decrypted plaintext frequency hopping data.

[0037] RSA is a kind of asymmetric encryption method, because the unauthorized receiver has no private key, even if the intercepted wireless communication information, also can't decrypt to obtain the AES key, realize the decryption of frequency hopping information, greatly guarantee the reliability of information encryption transmission; AES is a kind of symmetric encryption algorithm, its encryption and decryption process uses the same key. This encryption mode encryption speed is very fast, can help the transmitting end and authorized end quickly interact frequency hopping information.

[0038] Figure 3 is the schematic diagram of the adjustable resonant inductance device, L r is the adjustable resonant inductance of the access circuit, that is Figure 1 L r1 or L r2 , L c is a control coil, which is wound on a magnetic core with L r . L c is powered by an H-bridge circuit, which can adjust the size and direction of I dc . The frequency hopping controller gives the current, voltage feedback quantity according to the frequency hopping data, calculates the PWM signal required by the H-bridge of the adjustable resonant inductance control circuit, so as to adjust I dc in the control coil, that is, to change the magnetic reluctance of the magnetic core, and then to change L r , finally to change the resonant frequency of the system, realize the inductance tuning. The adjustable resonant inductance structure is relatively simple, which can avoid the redundancy of capacitor elements in the switched capacitor array and the switching loss problem in the virtual capacitor; at the same time, the adjustable resonant inductance device is coupled between the main circuit and the control circuit through the magnetic field, which avoids the electrical connection between the two, and can improve the reliability of the wireless encrypted charging system.

[0039] Figure 4 is a common resonant network structure in wireless energy transmission system, which is divided into four types of series-series, series-parallel, parallel-series and parallel-parallel according to the series and parallel relationship of inductance and capacitance. In the figure, C p , C s are the resonant compensation capacitors of the transmitting end and the receiving end, L p , L s are the inductances of the transmitting end and the receiving end of the wireless energy transmission coil, M is the mutual inductance between them, U p is the power supply, and R L is the load resistance. In order to make the system realize resonance, the ideal values of resonant compensation capacitors in different schemes are calculated as shown in table 1:

[0040] Table 1 resonant compensation capacitor value

[0041]

[0042] According to the results of Table 1, in the resonant network containing parallel structure, the receiving end load and the coil mutual inductance parameters need to be considered when calculating the resonant compensation capacitor, so that its stability performance is poor when facing parameter fluctuations. Since the load or the mutual inductance between the coils cannot be required to be always unchanged during charging, in order to stabilize the transmission efficiency of the system, the wireless charging of the electric vehicle should select the series-series resonant network structure.

[0043] Figure 5 There are two ways to introduce adjustable resonant inductance in the series-series resonant network structure, which are to connect the adjustable resonant inductance in parallel (P type) or in series (S type) with the resonant capacitor. Among them, C1 and C2 are the resonant capacitors of the transmitting end and the receiving end, L 11 , L 22 are the coil inductances of the wireless energy transmission coil transmitting end and receiving end, MS is the mutual inductance between them, L r1 , L r2 are the adjustable resonant inductances of the transmitting end and the receiving end, respectively. The circuit element parameters of the transmitting end and the receiving end are completely symmetrical. The self-resonant frequency ω of the two types of resonant networks is calculated respectively, and the following is obtained:

[0044]

[0045] In order to ensure that the energy of the transmitting end is only radiated to the authorized receiving end and to enhance the discrimination effect on the authorized end and the unauthorized end, the energy transmission efficiency needs to have strong frequency sensitivity. The frequency sensitivity of the P type and S type resonant networks about the adjustable resonant inductance is calculated respectively, and the following is obtained: Figure 4

[0046]

[0047] The greater the value of dω / dL r1 , the easier it is to adjust the resonant frequency by adjusting the adjustable resonant inductance, that is, in a smaller inductance tuning range, a wider resonant frequency adjustment range can be obtained. The greater the frequency hopping range of the system, the more difficult it is for the unauthorized end to steal electricity, that is, the better the encryption effect. Comparing formula (3) and (4), it can be seen that the condition for adopting the P type resonant network is:

[0048]

[0049] That is, when L 11 > (or >>) L r1 , formula (3) is satisfied.

[0050]

[0051] Therefore, under the condition that L 11 is determined, better encryption effect can be achieved by adopting the P type resonant network.

[0052] Combining​Figure 4 and Figure 5 the content of the wireless energy encryption transmission system shown in Figure 1 The wireless energy transmission system in the application applies a series-series resonant network infrastructure, which can stabilize the transmission efficiency of the system when dealing with load and mutual inductance parameter fluctuations. On this basis, a tunable resonant inductor is connected in parallel, which enhances the sensitivity of the system operating frequency to inductance tuning. By using a small range of inductance tuning, the system resonant frequency can be switched in a wide range, saving the total cost of the system.

[0053] Figure 6 The frequency sensitivity of the transmission efficiency of the wireless energy encryption transmission system. According to the circuit structure shown in Figure 1 The energy transmission efficiency of the authorized and unauthorized receiving end is obtained by continuously changing the operating frequency of the transmitting end. From the results, when the transmitting end operates at any frequency, the authorized receiving end can maintain the highest transmission efficiency by precise tuning because it knows the frequency hopping rule, ensuring the stability and efficiency of the system transmission efficiency; while the unauthorized receiving end only reaches the highest transmission efficiency at a certain moment when its resonant frequency coincides with the switching frequency of the transmitting end, and the rest of the operating points all show a significant efficiency drop. According to the results of Figure 6 The resonant network structure in the application makes the wireless energy transmission efficiency have significant operating frequency sensitivity. The non-tunable receiving end can only get a small amount of energy in most cases, while the authorized receiving end maintains stable high energy transmission, which is the premise of realizing the encryption transmission of wireless energy.

[0054] Figure 7 The application diagram of the wireless energy encryption transmission system in the charging highway or parking lot. The wireless charging highway or parking lot is regarded as the transmitting end, the authorized electric vehicles are regarded as the tunable receiving end, and the electric vehicles without authorization are regarded as the non-tunable receiving end. The transmitting end's background generates a frequency hopping data every 1 minute, when the car drives into the charging area, it sends a charging request to the transmitting end through, for example, a mobile phone scan code. The background first detects the account balance of the car, and sends the authorization code to the mobile phone if it meets the requirements. After the handshake between the two parties through encryption algorithm, the next minute's frequency hopping data is encrypted and sent to the car end by comparing and correcting the system time of the two parties. The car end can obtain the corresponding information after decryption, and adjust its inductance tuning device according to the rule. The above process is repeated every minute after connection until the car leaves the charging highway or the balance is zero.

[0055] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Working principle: the receiving end generates a public key and a private key using RSA algorithm, and sends the public key to the transmitting end; after receiving the public key, the transmitting end generates an AES key and an AES key encrypted by the public key using RSA algorithm, sends the AES key encrypted by the public key to the receiving end through the wireless signal channel, and uses the AES algorithm to encrypt the plaintext frequency hopping data combined with the AES key, and sends the ciphertext to the receiving end; the receiving end sends the received AES key encrypted by the public key and the private key generated by the RSA algorithm into the RSA algorithm at the same time, obtains the AES key, and uses the AES algorithm combined with the AES key to process the ciphertext and obtain the decrypted plaintext frequency hopping data.

[0057] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A wireless power encryption transmission method employing inductive tuning, the method being applicable to a wireless power transmission system, the wireless power transmission system comprising a transmitter and a receiver, characterized in that, The transmitting end includes a resonant converter (1), an adjustable resonant inductor (2), a resonant capacitor (3), and a transmitting coil (4). The receiving end includes a receiving coil (5), an adjustable resonant inductor (6), a resonant capacitor (7), and a resonant converter (8). The adjustable resonant inductor (2) and the resonant capacitor (3) form a parallel resonant network for the transmitting end. The adjustable resonant inductor (6) and the resonant capacitor (7) form a parallel resonant network for the receiving end. The plaintext frequency hopping data at the transmitting end is encrypted using an encryption algorithm and wirelessly transmitted to the receiving end. The decrypted frequency hopping data is obtained through the decryption algorithm at the receiving end. The frequency hopping controllers at the transmitting and receiving ends calculate and output PWM drive signals based on the frequency hopping data and current and voltage feedback. The PWM drive signals drive and adjust the DC current flowing in the transmitting coil (4) and receiving coil (5), thereby synchronously controlling the inductance values ​​of the adjustable resonant inductor (2) at the transmitting end and the adjustable resonant inductor (6) at the receiving end. This ensures that the operating frequencies of the resonant converters at the transmitting and receiving ends keep synchronously changing and are consistent with the switching frequencies of the resonant converters (1) at the transmitting end and (8) at the receiving end, thus achieving a synchronous resonant operating mode. The resonant frequencies of the parallel resonant network at the transmitting end and the parallel resonant network at the receiving end are respectively and , The inductance value of the adjustable resonant inductor (2) at the transmitting end is given. The inductance value of the adjustable resonant inductor (6) at the receiving end is given. Let be the capacitance value of the resonant capacitor (3) at the transmitting end. The capacitance value of the receiving end resonant capacitor (7) is given.

2. The wireless power encryption transmission method using inductive tuning according to claim 1, characterized in that, The transmitting and receiving ends transmit frequency-hopping data in an encrypted manner, achieving secure transmission of the frequency-hopping data information through a wireless signal channel. Specifically, the receiving end uses the RSA algorithm to generate a public key and a private key, and sends the public key to the transmitting end. After receiving the public key, the transmitting end uses the RSA algorithm to generate an AES key and an AES key encrypted with the public key. The AES key encrypted with the public key is directly sent to the receiving end through the wireless signal channel. The transmitting end also uses the AES algorithm in combination with the AES key to encrypt the plaintext frequency-hopping data, generating ciphertext, which is then sent to the receiving end. At the receiving end, the received AES key encrypted with the public key and the private key generated by the RSA algorithm are simultaneously fed into the RSA algorithm to obtain the AES key. At the receiving end, the ciphertext is processed using the AES algorithm in combination with the AES key to obtain the decrypted plaintext frequency-hopping data.

3. The wireless power encryption transmission method using inductive tuning according to claim 2, characterized in that, The receiving end requests charging from the transmitting end by scanning a QR code with a mobile phone or using a control terminal, i.e., sending a public key to the transmitting end. After receiving the request, the transmitting end checks the balance or payment information, and after confirmation, sends encrypted frequency hopping data and an AES key encrypted with the public key, thus authorizing the receiving end to perform energy transmission and preventing unauthorized receiving ends from illegally stealing energy. The encrypted frequency hopping data is also known as ciphertext. The wireless communication methods used by the transmitting end and the receiving end to transmit encrypted information include WiFi, 2G / 3G / 4G / 5G wireless networks, Zigbee, Bluetooth, and IoT networks, which are suitable for electric vehicle parking lot charging and wireless charging highways.

4. The wireless power encryption transmission method using inductive tuning according to claim 3, characterized in that, The encrypted transmission of the ciphertext and key uses either a single AES algorithm, a single RSA algorithm, or a combination of AES and RSA algorithms.

Images