TWI779928B - Wireless electric energy charging and data transmission system - Google Patents

Abstract

This invention includes a supplying side unit and a storing side unit. The supplying side unit contains an electricity suppling portion, a first LC resonant circuit portion, and a supplying side processing unit. The storing side unit contains a second LC resonant circuit portion, an AC-to-DC converting portion, an electricity storing side voltage detecting unit, and an electricity storage. It can conduct wireless charging via the magnetic resonant coupling between the first and second LC resonant circuit portions. This second LC resonant circuit portion is disposed with a changeable capacitor portion that can transfer a binary data from the storing side unit to the supplying side unit. The supplying side processing unit detects the voltage-current phase relationship and then converts it into 0 or 1. Hence, it can achieve the data transmission from the storing side unit to the supplying side unit while the wireless charging process is ongoing. Therefore, it is quite convenient to achieve the data transmission during the wireless charging process. It has certain confidentiality because the transmitted data need to be decoded. The hardware manufacturing cost is low while comparing to the need of extra RF communication links.

Description

System for Wireless Power Charging and Data Transmission

The present invention relates to a system of wireless energy charging and data transmission, especially a kind of wireless device which is convenient for data transmission during the charging process, data needs to be decoded to be confidential, and has low cost because no additional communication components are required for hardware production. A system capable of charging and data transmission.

In recent years, electric vehicles have gradually become popular, making some parking lots begin to provide electric vehicle charging equipment.

However, in order to take into account the flexible use of building space and parking needs, the parking lots of many buildings are located in the basement, and the communication environment of the basement parking lot is usually not good, because the semi-enclosed space will shield radio waves, such as: WiFi and 4G network, etc. Although electric vehicles can be charged, they cannot be connected to the Internet, and drivers have no way of knowing the charging status of electric vehicles. Most non-profit basements do not provide wireless networks, which makes it difficult to monitor charging.

In addition, general charging equipment only provides charging, and cannot transmit or receive encrypted data related to the vehicle through the magnetic field waveform.

In view of this, it is necessary to develop a technology that can solve the above-mentioned conventional shortcomings.

The purpose of the present invention is to provide a system for wireless energy charging and data transmission, which is convenient for data transmission during the charging process, data needs to be decoded to be confidential, and the cost of hardware production is low because no additional communication components are required. advantage. In particular, the problem to be solved by the present invention is that the traditional wireless charging device cannot transmit the encrypted vehicle registration data, battery status or related information of the vehicle while charging, which is very inconvenient.

The technical means to solve the above problems is to provide a wireless energy charging and data transmission system, which includes: a power supply side unit, which has a power supply part, a first LC resonant circuit part, a power supply line and a power supply grounding line; The power supply part, the power supply line, the first LC resonant circuit part and the power supply grounding line are connected in series; the power supply line has a first contact point between the power supply part and the first LC resonant circuit between the parts; the power supply ground line has a second contact, which is between the power supply part and the first LC resonant circuit part; the first LC resonant circuit part has a first capacitor and a first The coil, the first LC resonant circuit part has a resonant frequency; a power supply side voltage detection unit is connected in parallel with the first contact and the second contact for detecting and obtaining a first AC voltage, The frequency of the first AC voltage is between 90% and 110% of the resonant frequency; a power supply side current detection unit is electrically connected to the first LC resonant circuit part to capture a power supply current; A power supply side processing unit is electrically connected to the power supply side unit, the power supply side voltage detection unit and the power supply side current detection unit, and used to capture the first AC voltage and the power supply current; a power storage side unit , having a second LC resonant circuit part, an AC to DC processing part, a power storage side power line, a power storage side grounding wire and a power storage part; the second LC resonant circuit part, the power storage side power supply line, the AC-to-DC processing part, and the storage-side grounding line are connected in series in sequence; the power storage part is then connected in parallel to the AC-to-DC processing part, and the second LC resonant circuit part is used to output a second AC voltage; The power line on the power storage side has a third contact, which is between the second LC resonant circuit part and the AC-to-DC processing part, and the ground line on the power storage side has a fourth contact, which is between the second LC resonant circuit part and the AC-to-DC processing part; and, the second LC resonant circuit part has a variable capacitance part and a second coil, and the variable capacitance part has a switch control means, which is used to input the variable capacitance part a switching signal, the switching signal can make the variable capacitance part change between at least a first capacitance value and a second capacitance value; a power storage side voltage detection unit is connected in parallel between the third contact and the The fourth contact is used to detect the cycle of the second AC voltage as the control basis for wireless charging; a capacitance value modulation unit is electrically connected to the switching control device to output the switching signal; a power storage The side processing unit is electrically connected to the AC-to-DC processing unit, the storage-side voltage detection unit, and the capacitance value modulation unit; the storage-side processing unit has at least one storage-side data, and can use the The power storage side data is processed into a corresponding binary data, and then sent to the capacitance value modulation unit as the basis for outputting the switching signal; thereby, the second LC resonant circuit part is output to the AC to DC processing part The second AC voltage; the AC-to-DC processing unit performs AC-to-DC processing on the second AC voltage, and then inputs it into the power storage unit for wireless energy charging; in addition, when the value of the binary data is 0, the switching control The device converts the variable capacitance part to the first capacitance value through the switching signal, so that the first AC voltage and the supply current present a phase relationship of a current leading voltage; and when the value of the binary data is 1, Then the switching control device converts the variable capacitance part to the second capacitance value through the switching signal, so that the first AC voltage and the supply current present a phase relationship in which the current lags behind the voltage; and the power supply side processes The unit then converts the phase relationship between the first AC voltage and the supply current back to 0 or 1, that is, obtains the binary data transmitted by the power storage side unit, and realizes synchronous data transmission during wireless charging.

The above objects and advantages of the present invention can be easily understood from the detailed description of the following selected embodiments and the accompanying drawings.

The present invention is hereafter described in detail with the following embodiments and accompanying drawings:

10: Power supply side unit

11: Power supply department

111: DC power supply

112: Power supply inductance

113: power supply capacitor

114: DC power cord

115: DC ground wire

12: The first LC resonant circuit part

20: Power supply side voltage detection unit

30: Power supply side current detection unit

40: power supply side processing unit

50: Storage side unit

51: Second LC resonance circuit part

52: AC to DC processing unit

521: Storage side power cord

522: Storage side ground wire

53: Power storage department

531: electricity storage

532: storage side inductance

533: Storage side capacitor

60: Storage side voltage detection unit

70:Capacitance value modulation unit

80: Storage side processing unit

81: Input interface

82: Biometric processing department

83:Encryption module

91: Storage side information

92: Binary data

93: Decode preset value

M1: power cord

M11: first contact

M2: power supply ground wire

M21: Second contact

M3: power cord on storage side

M31: The third contact

M4: grounding wire on the storage side

M41: The fourth contact

C1: the first capacitor

C2: variable capacitance part

C21: Switch control device

C22: second capacitor

C23: adjustment capacitor

Cp: switching signal

L1: the first coil

L2: second coil

Vp: the first AC voltage

Vs: the second AC voltage

Ip: supply current

P1: The phase relationship between the current lagging behind the voltage

P2: Phase relationship of current leading voltage

S1: the first transistor

S2: second transistor

S3: The third transistor

S4: The fourth transistor

S5: fifth transistor

S6: The sixth transistor

S7: The seventh transistor

S8: Eighth transistor

OPA1: The first integrated operational amplifier

OPA2: second integrated operational amplifier

OPA3: The third integrated operational amplifier

RA1: The first resistor on the power supply side

RA2: The second resistor on the power supply side

RA3: The third resistor on the power supply side

RA4: The fourth resistor on the power supply side

RA5: The fifth resistor on the power supply side

RA6: The sixth resistor on the power supply side

RA7: The seventh resistor on the power supply side

RA8: The eighth resistor on the power supply side

RA9: The ninth resistor on the power supply side

RA10: The tenth resistor on the power supply side

RA11: Eleventh resistor on the power supply side

RB1: The first resistor on the storage side

RB2: The second resistor on the storage side

RB3: The third resistor on the storage side

RB4: The fourth resistor on the storage side

RB5: The fifth resistor on the storage side

RB6: The sixth resistor on the storage side

T1: voltage start time

T2: current cut-off time

T: AC voltage cycle

K1: Cloud server module

K11: decryption module

K2: Communication module

Figure 1 is the reference circuit and block diagram of the present invention

Figure 2 is a reference schematic diagram of a part of the circuit of the power supply side unit of the present invention

Figure 3 is a reference schematic diagram of a part of the circuit of the power storage side unit of the present invention

Fig. 4A is the waveform reference diagram of the present invention

Figure 4B is a partially enlarged schematic diagram of the phase relationship between the first AC voltage and the supply current in Figure 4A showing the current lagging behind the voltage

Figure 4C is a partially enlarged schematic diagram of the phase relationship between the first AC voltage and the supply current presenting the current leading voltage in Figure 4A

Referring to Figures 1, 2, 3, 4A, 4B and 4C, the present invention is a wireless energy charging and data transmission system, which includes a power supply side unit 10 and a power supply side voltage detection unit 20 , a power supply side current detection unit 30 , a power supply side processing unit 40 , a power storage side unit 50 , a power storage side voltage detection unit 60 , a capacitance value modulation unit 70 and a power storage side processing unit 80 . in:

The power supply side unit 10 has a power supply part 11, a first LC resonant circuit part 12, a power supply line M1 and a power supply ground line M2. The power supply part 11 , the power supply line M1 , the first LC resonant circuit part 12 and the power supply ground line M2 are serially connected in series. The power supply line M1 has a first contact point M11, which is interposed between the power supply part 11 and the first LC resonant circuit part 12, and the power supply ground line M2 has a second contact point M21, which is between the Between the power supply part 11 and the first LC resonant circuit part 12, the first LC resonant circuit part 12 has a first capacitor C1 and a first coil L1; the first LC resonant circuit part 12 has a resonant frequency .

Regarding the power supply side voltage detection unit 20, it is connected in parallel with the first contact M11 and the second contact M21 for detecting and obtaining a first AC voltage Vp (power supply side), the first AC voltage Vp The frequency is between 90% and 110% of the resonance frequency.

The power-supply-side current detection unit 30 is electrically connected to the first LC resonant circuit portion 12 for capturing a power-supply current Ip.

The power supply side processing unit 40 is electrically connected to the power supply side unit 10 , the power supply side voltage detection unit 20 and the power supply side current detection unit 30 . And used to capture the first AC voltage Vp and the supply current Ip.

The power storage side unit 50 has a second LC resonant circuit part 51 , an AC to DC processing part 52 , a power storage side power line M3 , a power storage side ground line M4 and a power storage part 53 . The second LC resonant circuit part 51 , the power storage side power line M3 , the AC-to-DC processing part 52 and the power storage-side grounding line M4 are connected in series in sequence, and the power storage part 53 is connected in parallel to the AC-to-DC processing part 52 . The second LC resonant circuit part 51 is used to output a second AC voltage Vs; the power storage side power line M3 has a third contact M31, which is between the second LC resonant circuit part 51 and the AC-to-DC converter. Between the processing parts 52 , the storage-side ground wire M4 has a fourth contact M41 , which is interposed between the second LC resonant circuit part 51 and the AC-to-DC processing part 52 . Moreover, the second LC resonant circuit part 51 has a variable capacitance part C2 and a second coil L2. The variable capacitance part C2 is provided with a switching control device C21, which is used to input a switching signal Cp to the variable capacitance part C2, and the switching signal Cp can make the variable capacitance part C2 at least less than a first capacitance value and Switch between a second capacitance value.

The storage-side voltage detection unit 60 is connected in parallel with the third contact M31 and the fourth contact M41 to detect the period of the second AC voltage Vs as a control basis for wireless charging.

The capacitance modulating unit 70 is electrically connected to the switching control device C21 for outputting the switching signal Cp.

The storage-side processing unit 80 is electrically connected to the AC-to-DC processing unit 52 , the storage-side voltage detection unit 60 and the capacitance modulation unit 70 . The power storage side processing unit 80 has at least one power storage side data 91, and can process the power storage side data 91 into a corresponding binary data 92, and then send it to the capacitance value modulation unit 70 as the output switching The basis for the signal Cp.

Thereby, the second LC resonance circuit part 51 outputs the second AC voltage Vs to the AC-to-DC processing part 52; the AC-to-DC processing part 52 performs AC-to-DC processing on the second AC-to-DC processing part, and then inputs The power storage unit 53 performs wireless power charging.

Moreover, when the value of the binary data 92 is 0, the switching control device C21 converts the variable capacitance part C2 to the first capacitance value through the switching signal Cp, so that the first AC voltage Vp and the supply current Ip exhibits a phase relationship P2 in which current leads voltage (as shown in Figures 4A and 4C). And when the value of the binary data 92 is 1, the switching control device C21 converts the variable capacitance part C2 to the second capacitance value through the switching signal Cp, thereby making the first AC voltage Vp and the supply current Ip There is a phase relationship P1 in which the current lags behind the voltage (as shown in Figures 4A and 4B). Moreover, the processing unit 40 on the power supply side converts the phase relationship between the first AC voltage Vp and the supply current Ip back to 0 or 1, that is, obtains the binary data 92 transmitted by the power storage side unit 50, and achieves synchronization during wireless charging. The person who transmits the data.

In practice, the power supply unit 11 may include a DC power supply 111, a power supply inductor 112, a power supply capacitor 113, a DC power supply line 114, a DC ground line 115, a first transistor S1, a second transistor S2, A third transistor S3 and a fourth transistor S4. The DC power supply 111 , the power supply inductor 112 , the power supply capacitor 113 , the DC power supply line 114 and the DC ground line 115 are connected in parallel. The first transistor S1 , the second transistor S2 , the third transistor S3 and the fourth transistor S4 constitute a power supply side full-bridge inverter. Moreover, the first transistor S1 is connected in parallel between the DC power line 114 and the first contact M11, the second transistor S2 is connected in parallel between the DC ground line 115 and the first contact M11, The third transistor S3 is connected in parallel between the DC power line 114 and the second contact M21, and the fourth transistor S4 is connected in parallel between the DC ground line 115 and the second contact M21.

The first transistor S1 , the second transistor S2 , the third transistor S3 and the fourth transistor S4 can all be Metal Oxide Semiconductor Field Effect Transistors (MOS for short).

As shown in Figure 2, the power supply side voltage detection unit 20 can in principle further include a first resistor RA1 (resistance value can be 470 ohms) on the power supply side, a second resistor RA2 (resistance value can be 470 ohms) on the power supply side ), a third resistor RA3 on the power supply side (the resistance value can be 10K ohms), a fourth resistor RA4 on the power supply side (the resistance value can be 10K ohms), a fifth resistor RA5 on the power supply side (the resistance value can be 1K ohms), A sixth resistor RA6 on the power supply side (resistance value can be 1K ohms) and a first integrated operational amplifier OPA1, the circuit connection relationship can refer to Figure 2, of course, the number, specifications and serial (parallel) connection of the aforementioned electronic components The relationship between them is just an example, and the number and specifications of simple electronic components and their serial (parallel) connection relationship conversion are not outside the scope of protection of this case.

In principle, the current detection unit 30 on the power supply side can further include a seventh resistor RA7 on the power supply side (the resistance value can be 390 ohms), an eighth resistor RA8 on the power supply side (the resistance value can be 10K ohms), a ninth resistor on the power supply side Resistor RA9 (resistance value can be 1K ohm), a tenth resistor RA10 on the power supply side (resistance value can be 1K ohm), an eleventh resistor RA11 on the power supply side (resistance value can be 1K ohm), and a second integrated operational amplifier OPA2, its circuit connection relationship can refer to Figure 2. Of course, the quantity, specification and serial (parallel) connection of the aforementioned electronic components are just examples. The simple quantity, specification and serial (parallel) connection of electronic components The transformation of the relationship between the associations still does not depart from the scope of protection in this case.

The AC-to-DC processing unit 52 may include a storage-side power line 521, a storage-side grounding line 522, a fifth transistor S5, a sixth transistor S6, a seventh transistor S7, and an eighth transistor. Crystal S8.

The fifth transistor S5 , the sixth transistor S6 , the seventh transistor S7 and the eighth transistor S8 can all be Metal Oxide Semiconductor Field Effect Transistors (MOS for short).

Also, referring to FIG. 3 , the power storage unit 53 may include a power storage object 531 (which may be a vehicle to be charged), a power storage side inductor 532 and a power storage side capacitor 533 .

In this way, the power storage object 531 , the power storage side inductor 532 , the power storage side capacitor 533 , the power storage side power line 521 and the power storage side grounding line 522 are connected in parallel. Also, the fifth transistor S5, the sixth transistor The bulk S6, the seventh transistor S7 and the eighth transistor S8 constitute a full-bridge inverter on the power storage side. In addition, the fifth transistor S5 is connected in parallel between the storage side power line 521 and the third contact M31, and the sixth transistor S6 is connected in parallel between the storage side grounding line 522 and the third contact. Between M31, the seventh transistor S7 is connected in parallel between the storage side power line 521 and the fourth contact M41, and the eighth transistor S8 is connected in parallel between the storage side ground line 522 and the fourth contact point M41. Between contacts M41.

Referring to FIG. 3, the storage side voltage detection unit 60 can in principle include a first resistor RB1 (resistance value can be 470 ohms) on the storage side, a second resistor RB2 (resistance value can be 470 ohms) on the storage side ), a third resistor RB3 on the storage side (the resistance value can be 10K ohms), a fourth resistor RB4 on the storage side (the resistance value can be 10K ohms), a fifth resistor RB5 on the storage side (the resistance value can be 1K ohm), a sixth resistor RB6 on the power storage side (the resistance value can be 1K ohm), and a third integrated operational amplifier OPA3.

Regarding the AC-to-DC processing part 52, the power storage part 53 and the power storage side voltage detection unit 60, the circuit connection relationship of their sub-components can refer to Figures 1 and 2 respectively. Of course, the quantity and specifications of the aforementioned electronic components And the relationship between series (parallel) connection is just an example. The quantity and specification of simple electronic parts and the relationship between series (parallel) connection are still within the protection scope of this case.

The variable capacitor C2 may further have a second capacitor C22 and an adjustment capacitor C23; the switching control device C21 is electrically connected to the second capacitor C22 and the adjustment capacitor C23, and is used to control the adjustment capacitor C23 and the second capacitor C23. The connection relationship of the capacitor C22 is switched between parallel connection and open circuit.

Thereby, when the value of the binary data 92 is 0, the capacitance modulating unit 70 outputs the switching signal Cp through the switching control device C21, which makes the adjustment capacitor C23 and the second capacitor C22 in parallel connection, Furthermore, the variable capacitance part C2 is converted into the first capacitance value.

And when the value of the binary data 92 is 1, the capacitance value modulation unit 70 outputs the switching signal Cp through the switching control device C21, which makes an open circuit between the adjusting capacitor C23 and the second capacitor C22, and then The variable capacitance part C2 is converted to the second capacitance value.

As for practical application:

The capacitance of the first capacitor C1 is 0.07 μF.

The inductance value of the first coil L1 is 52.8 μH.

The capacitance of the second capacitor 22 can be 0.07 μF.

The capacitance value of the adjustment capacitor 23 can be 0.07 μF, and the capacitance value after being connected in parallel with the second capacitor 22 can be 0.14 μF.

The inductance of the second coil L2 may be 52.8 μH.

Also, the wireless charging (system) operating frequency is 83KHZ (SAE standard).

Similarly, the numerical values of the aforementioned electronic components are for illustration only, and can be adjusted according to actual usage requirements, without departing from the protection scope of this case.

The power storage side processing unit 80 has a built-in decoding default value 93 .

Also, referring to FIG. 4A, the first AC voltage Vp has a voltage start time T1.

The supply current Ip has a current cut-off time T2.

The current cut-off time T2 - the voltage start time T1 is the phase difference between the voltage and the current.

Also, the second AC voltage Vs has an AC voltage period T.

When (current cut-off time T2−voltage start time T1 )/AC voltage cycle T<the decoding preset value 93 .

Then the value of the binary data 92 is 0, so that the first AC voltage Vp and the supply current Ip present the phase relationship P2 of the current leading voltage (as shown in FIGS. 4A and 4C ).

When (current cut-off time T2−voltage start time T1 )/AC voltage cycle T>the decoding preset value 93 .

Then the value of the binary data 92 is 1, so that the first AC voltage Vp and the supply current Ip present a phase relationship P1 in which the current lags behind the voltage (as shown in FIGS. 4A and 4B ).

The aforementioned decoding preset value 93 may be between 35% and 45%, and preferably 40%.

Further, this case may further include:

A cloud server module K1 is connected to the power supply side processing unit 40, and the cloud server module K1 has a decryption module K11.

A communication module K2 is connected to the cloud server module K1, and the communication module K2 is used to upload the encrypted binary data 92 to the cloud server module K1, and utilize the decryption module K11 to upload The encrypted binary data 92 is decrypted.

The communication module K2 can be at least one of a mobile phone and related network communication devices.

The power storage side processing unit 80 further includes:

An input interface (or other known biometric feature capture device) 81 can be connected to the cloud server module K1 and input its biometric and vehicle data for the driver. The biometric can be selected from fingerprints (refer to the Republic of China Invention Patent No. I710966 (Fingerprint Identification Device, Fingerprint Identification Module and Fingerprint Identification Device Control Method), Iris Image (Refer to the Iris Recognition System of the Republic of China Invention Patent No. I335544), Face Image (Refer to the Republic of China Invention At least one of the face recognition device and face recognition method of Patent No. I722872).

A biological feature processing unit 82 is used to convert the biological feature into binary information of a biological feature.

An encryption module 83 is used to encrypt the biometric digital information and the power storage side data 91 to obtain the encrypted binary data 92 .

The procedure used in this case is as follows:

First, (the driver) parks the vehicle with the second LC resonant circuit part 51 (that is, the power storage object 531, which is provided with the second LC resonant circuit part 51) at the wireless power feeding induction coil (that is, the electric power storage device 531). The first LC resonant circuit part 12 can interact with the second LC resonant circuit part 51 ).

Then, the driver uses the man-machine interface (such as the input interface 81) in the car to input the personal name (also can be the biometric feature) and the license plate (that is, the vehicle data). Then press the binding button to start the fingerprint module (such as the biological feature processing unit 82) to read the driver's fingerprint feature. After the driver's fingerprint features are read, the The machine interface extracts the fingerprint feature parameters to encrypt the vehicle data (can be processed through the encryption module 83). The encrypted data is converted into the binary data 92 and sent to the secondary modulation circuit (such as the capacitance modulation unit 70 ).

After the secondary side modulation circuit receives the binary data 92, the power storage side processing unit 80 cooperates with the power storage side voltage detection unit 60 to calculate the voltage period of the second AC voltage Vs of the second LC resonant circuit part 51 , to obtain the wireless charging operating frequency, and then control the variable capacitance part C2 through the capacitance value modulation unit 70 to encrypt the binary data 92 and output it.

The binary data 92 (i.e. vehicle data) includes (but is not limited to): the driver’s name, license plate number, battery power and encryption key, and then controls the transistors in the full-bridge inverter on the power storage side to be turned on and off (known technology, need not repeat them).

Next, the wireless charging station intercepts the vehicle-mounted data (that is, the binary data 92) through the first AC voltage Vp and the power supply current Ip of the first LC resonant circuit part 12, and inputs it into the power supply side processing unit 40, which is calculated The interruption time of voltage and current can be used to obtain the pulse width of each cycle. When the pulse width is greater than the decoding default value of 93, the value of the binary data 92 is restored to 1, and when the pulse width is less than the decoding default value of 93 , restore the value of the binary data 92 to 0.

Moreover, the wireless charging station can also directly upload the captured vehicle data (that is, the binary data 92 ) to the cloud server module K1 through the Wi-Fi module through the network communication protocol.

The cloud server module K1 can also decode the binary data 92 . The driver can scan the two-dimensional code (such as a real-name system two-dimensional code) on the human-machine interface (that is, the input interface 81) through the communication module K2, and then connect to the cloud server module K1, and enter at any time. The web application queries related vehicle charging information (for example: battery level, of course, the vehicle information on the webpage may be updated asynchronously via the web server...).

The hardware architecture of the present invention is divided into the following four parts:

1. The system architecture of the primary side and the secondary side of the magnetic resonance wireless charging system is the subject of the present invention. The power supply side processing unit 40 installed in the primary side circuit is used to control the on and off of the first transistor S1, the second transistor S2, the third transistor S3 and the fourth transistor S4 respectively time, to ensure that the DC voltage of the DC power supply 111 is converted by the full-bridge inverter (inverter) and the first AC voltage Vp is close to the resonance frequency of the primary side LC tank (the frequency of the first AC voltage Vp is between the resonance frequency Between 90% and 110% of the frequency), achieve magnetic resonance for wireless charging (further output the LC tank voltage and current signals through the demodulation circuit, and calculate the voltage and current interruption time to calculate the phase difference between the two) .

2. The man-machine interface on the secondary side uses a computer and a fingerprint module as the system input interface. The man-machine interface of the present invention (that is, the input interface 81 ) is convenient for inputting personal information (that is, biometric features), and at the same time, it cooperates with a fingerprint module to perform encryption. After the input data is completed, the fingerprint module will extract the driver's fingerprint feature to encrypt the input data (becoming the binary data 92). The encrypted data will be compressed into a binary format and sent to the power storage side processing unit 80 .

3. After the secondary-side modulation circuit receives the binary encrypted data, it controls the fifth transistor S5, the sixth transistor S6, the seventh transistor S7, and the sixth transistor S5 in a binary state of "1" or "0". The eight-transistor S8 is turned on and off. When the data is modulated, the power storage side processing unit 80 introduces the adjustment capacitor C23 to lower the resonant frequency and cause the phase change of current and voltage, thereby modulating the binary data 92 . On the contrary, the primary side captures the binary data 92 through pulse width demodulation, and uploads it to the cloud server module K1 through the communication module K2.

Of course, the above encryption operation (decryption data part, such as converting the fingerprint feature into an inverse matrix, multiplying the encrypted data to restore the original data) can also be other known types.

4. The main functions of the cloud server module K1 of this system are (i) receiving the information uploaded by the primary side (that is, the power supply side unit 10), (ii) decoding the message, and (iii) providing a webpage for the driver to view the vehicle Energy storage information and (iv) asynchronous vehicle data update.

That is, the technical fields covered by the present invention are electric vehicles, wireless charging, biometric encryption, data processing, Internet of Things, network communication and cloud server module K1. The present invention utilizes the magnetic resonance circuit of the wireless power transmission framework (network communication function may not be required), and simultaneously realizes the functions of charging and encrypted on-vehicle power information return. When this solves the situation of poor communication quality in underground parking lots or areas, the driver can use this invention to enable the vehicle and the charging station to directly transmit on-board data encryption without the need for additional communication facilities. It can also be equipped with biometric encryption and cloud server module K1, and vehicle data can be uploaded to the cloud server module K1, which improves the security of communication quality and protects the driver's privacy.

Advantage and effect of the present invention can be summarized as follows:

[1] It is very convenient to transmit data while charging. In the charging process, the present invention can directly carry data back with the magnetic field waveform, without additional data transmission device, which is very convenient. Therefore, it is very convenient to transmit data while charging.

[2] The data needs to be decoded to be confidential. The process of using electric energy to transmit data in the present invention is to form encrypted binary data by controlling the phase difference between voltage and current. The binary data needs to be decoded to become readable data. Even if the waveform of electric energy is intercepted, it is just like noise That's all. Therefore, the data needs to be decoded to be confidential.

[3] The cost of hardware production is low because no additional communication components are required. The present invention utilizes the magnetic field waveform of the wireless charging circuit to entrain digital information, and does not need to add hardware such as a wireless digital data transmission network (for example: Bluetooth, English is Bluetooth, ..., Wi-Fi, etc.), so the hardware production is not necessary. Additional communication components are required so the cost is low.

The above is only a detailed description of the present invention through preferred embodiments, and any simple modifications and changes made to the embodiments will not depart from the spirit and scope of the present invention.

10: Power supply side unit

11: Power supply department

111: DC power supply

112: Power supply inductance

113: power supply capacitor

114: DC power cord

115: DC ground wire

12: The first LC resonant circuit part

20: Power supply side voltage detection unit

30: Power supply side current detection unit

40: power supply side processing unit

50: Storage side unit

51: Second LC resonance circuit part

52: AC to DC processing unit

521: Storage side power cord

522: Storage side ground wire

53: Power storage department

531: electricity storage

532: storage side inductance

533: Storage side capacitor

60: Storage side voltage detection unit

70:Capacitance value modulation unit

80: Storage side processing unit

81: Input interface

82: Biometric processing department

83:Encryption module

91: Storage side data

92: Binary data

93: Decode preset value

M1: power cord

M11: first contact

M2: power supply ground wire

M21: Second contact

M3: power cord on storage side

M31: The third contact

M4: grounding wire on the storage side

M41: The fourth contact

C1: the first capacitor

C2: variable capacitance part

C21: Switch control device

C22: second capacitor

C23: adjustment capacitor

Cp: switching signal

L1: the first coil

L2: second coil

Vp: the first AC voltage

Vs: the second AC voltage

Ip: supply current

S1: the first transistor

S2: second transistor

S3: The third transistor

S4: The fourth transistor

S5: fifth transistor

S6: The sixth transistor

S7: The seventh transistor

S8: Eighth transistor

K1: Cloud server module

K11: decryption module

K2: Communication module

Claims (9)

A system for wireless energy charging and data transmission, comprising: a power supply side unit having a power supply unit, a first LC resonant circuit unit, a power supply line and a power supply ground line; the power supply unit, the power supply line , the first LC resonant circuit part and the power supply grounding line are connected in series; the power supply power line has a first contact, which is interposed between the power supply part and the first LC resonant circuit part; the power supply grounding line It has a second contact, which is between the power supply part and the first LC resonant circuit part; the first LC resonant circuit part has a first capacitor and a first coil, and the first LC resonant circuit The part also has a resonant frequency; a power supply side voltage detection unit is connected in parallel with the first contact and the second contact to detect and obtain a first AC voltage, the frequency of the first AC voltage is Between 90% and 110% of the resonant frequency; a current detection unit on the power supply side, which is electrically connected to the first LC resonant circuit part, to capture a power supply current; a power supply side processing unit, which is electrically Sexually connecting the power supply side unit, the power supply side voltage detection unit and the power supply side current detection unit, and used to capture the first AC voltage and the supply current; a power storage side unit having a second LC resonance Circuit part, an AC-to-DC processing part, a storage-side power line, a power-storage-side grounding line, and a power-storage part; the second LC resonant circuit part, the power-storage-side power line, the AC-to-DC processing part and the ground wire on the power storage side are connected in series in sequence; the power storage part is connected in parallel with the AC-to-DC processing part, and the second LC resonant circuit part is used to output a second AC voltage; the power supply line on the power storage side has a The third contact is between the second LC resonant circuit part and the AC-to-DC processing part, and the power storage side grounding line has a fourth contact, which is between the second LC resonant circuit part and the AC-to-DC processing part; and, the second LC resonant circuit part has a variable capacitance part and a second coil, and the variable capacitance part has a switching control device for the Variable capacitor input one Switching signal, the switching signal can make the variable capacitance part change between at least a first capacitance value and a second capacitance value; a power storage side voltage detection unit is connected in parallel between the third contact and the second capacitance Four contacts, used to detect the cycle of the second AC voltage, as the control basis for wireless charging; a capacitance value modulation unit, electrically connected to the switching control device, to output the switching signal; a power storage side The processing unit is electrically connected to the AC-to-DC processing unit, the storage-side voltage detection unit, and the capacitance adjustment unit; the storage-side processing unit has at least one storage-side data, and can The electrical side data is processed into a corresponding binary data, and then sent to the capacitance value modulation unit as the basis for outputting the switching signal; thereby, the second LC resonant circuit part outputs the AC to DC processing part. The second AC voltage; after the AC-to-DC processing section performs AC-to-DC processing on the second AC voltage, it inputs the power storage section to perform wireless energy charging; and, when the value of the binary data is 0, the switching control device The variable capacitance part is converted to the first capacitance value through the switching signal, so that the first AC voltage and the supply current present a phase relationship of a current leading voltage; and when the value of the binary data is 1, then The switching control device converts the variable capacitance part to the second capacitance value through the switching signal, so that the first AC voltage and the supply current present a phase relationship in which the current lags behind the voltage; and the power supply side processing unit Then convert the phase relationship between the first AC voltage and the supply current back to 0 or 1, that is, obtain the binary data transmitted by the power storage side unit, and achieve synchronous data transmission during wireless charging. The system for wireless energy charging and data transmission as described in claim 1, wherein: the power supply part includes a DC power supply, a power supply inductor, a power supply capacitor, a DC power supply line, a DC ground line, a first a transistor, a second transistor, a third transistor and a fourth transistor; The DC power supply, the power supply inductor, the power supply capacitor, the DC power supply line and the DC ground line are connected in parallel; the first transistor, the second transistor, the third transistor and the fourth transistor form a power supply side full-bridge inverter; the first transistor system is connected in parallel between the DC power line and the first contact, the second transistor system is connected in parallel between the DC ground line and the first contact, the The third transistor system is connected in parallel between the DC power line and the second contact point, and the fourth transistor system is connected in parallel between the DC ground line and the second contact point. The system for wireless energy charging and data transmission as described in Claim 1, wherein: the voltage detection unit on the power supply side includes a first resistor on the power supply side, a second resistor on the power supply side, and a third resistor on the power supply side , a fourth resistor on the power supply side, a fifth resistor on the power supply side, a sixth resistor on the power supply side, and a first integrated operational amplifier; the current detection unit on the power supply side includes a seventh resistor on the power supply side, an eighth resistor on the power supply side resistors, a ninth resistor on the power supply side, a tenth resistor on the power supply side, an eleventh resistor on the power supply side, and a second integrated operational amplifier. The system for wireless energy charging and data transmission as described in claim 1, wherein: the AC-to-DC processing unit includes a storage-side power line, a storage-side grounding line, a fifth transistor, a A sixth transistor, a seventh transistor, and an eighth transistor; the electricity storage unit includes an electricity storage object, an electricity storage side inductor, and an electricity storage side capacitor; the electricity storage object, the electricity storage side inductor , the capacitor on the storage side, the power line on the storage side and the grounding line on the storage side are connected in parallel; the fifth transistor, the sixth transistor, the seventh transistor and the eighth transistor form a storage side full bridge inverter; The fifth transistor system is connected in parallel between the storage side power supply line and the third contact, the sixth transistor system is connected in parallel between the storage side ground line and the third contact point, and the seventh transistor system is connected in parallel between the storage side ground line and the third contact point. The crystal system is connected in parallel between the storage side power line and the fourth contact, and the eighth transistor system is connected in parallel between the storage side ground line and the fourth contact. The system for wireless energy charging and data transmission as described in Claim 1, wherein the voltage detection unit on the storage side may include a first resistor on the storage side, a second resistor on the storage side, a storage A third resistor on the power side, a fourth resistor on the power storage side, a fifth resistor on the power storage side, a sixth resistor on the power storage side, and a second integrated operational amplifier. The system for wireless power charging and data transmission as described in Claim 1, wherein: the variable capacitor has a second capacitor and an adjustment capacitor; the switching control device is electrically connected to the second capacitor and the The adjustment capacitor is used to control the connection relationship between the adjustment capacitor and the second capacitor to switch between parallel connection and open circuit; thereby, when the value of the binary data is 0, the capacitance value modulation unit is controlled by the switch The device outputs the switch signal, which makes the adjustment capacitor and the second capacitor connected in parallel, and then changes the variable capacitor part to the first capacitor value; and when the value of the binary data is 1, the capacitor value The modulating unit outputs the switching signal through the switching control device, which makes an open circuit between the adjustment capacitor and the second capacitor, and then converts the variable capacitor part to the second capacitor value. The system for wireless energy charging and data transmission as described in claim 1, wherein: the power storage side processing unit has a built-in decoding default value, which is between 35% and 45%; the second an alternating voltage having a voltage start time; The supply current has a current cut-off time; the current cut-off time-voltage start time is equal to the phase difference between the voltage and the current; and the second AC voltage has an alternating voltage cycle; when (current cut-off time-voltage start time time)/AC voltage period<the decoding preset value; then the value of the binary data is 0, so that the first AC voltage and the supply current present a phase relationship in which the current leads the voltage; and when (current cut-off time-voltage start time)/AC voltage cycle>the decoding preset value, then the value of the binary data is 1, so that the first AC voltage and the supply current present a phase relationship in which the current lags behind the voltage. The system for wireless power charging and data transmission as described in Claim 7, wherein the decoding default value is 40%. The system for wireless energy charging and data transmission as described in claim 1 further includes: a cloud server module connected to the power supply side processing unit, the cloud server module has a decryption module ; A communication module is connected to the cloud server module, the communication module is used to upload the encrypted binary data to the cloud server module, and use the decryption module to upload the encrypted binary data to the cloud server module; Data decryption; In addition, the power storage side processing unit system also includes: an input interface, which is connected to the cloud server module, and for a driver to input his biometrics, the biometrics are selected from fingerprints, iris images, human At least one of the face images; a biometric processing unit, which is used to convert the biometric into binary biometric digital information; An encryption module is used to encrypt the biometric digital information and the power storage side data to obtain the encrypted binary data.

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