Wireless charging dynamic load quick response circuit

Abstract

The utility model relates to the technical field of wireless charging, and particularly discloses a wireless charging dynamic load quick response circuit, which comprises a wireless charging receiving end control module and a wireless charging transmitting end control module. The wireless charging receiving end control module is provided with a receiving end microwave communication circuit, a receiving induction coil and a receiving end control chip which controls the receiving end microwave communication circuit to be electrically connected with the wireless charging transmitting end control module through the receiving induction coil when the receiving end microwave communication circuit is in a data receiving or transmitting state. The wireless charging transmitting end control module is provided with a transmitting induction coil which is electrically connected with the receiving induction coil in a mutual inductance manner, and is provided with a transmitting end microwave communication circuit; and the transmitting end control chip is used for controlling the transmitting end microwave communication circuit to be electrically connected with the wireless charging receiving end control module through the transmitting induction coil when the transmitting end microwave communication circuit is in a data transmitting or receiving state.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging, in particular to a wireless charging dynamic load fast response circuit. Background Art

[0002] With the rapid development of technology, wireless charging technology has gradually become an integral part of our daily lives. From smartphones to smart homes to electric vehicles, wireless charging technology has brought tremendous convenience to our lives. Wireless charging technology is convenient, reduces cable clutter, and is also more environmentally friendly. No need to carry a variety of cables and adapters, reducing the burden of carrying. Charging devices can also be placed anywhere without worrying about electrical outlets. Wireless charging technology reduces the cable loss and waste associated with wired charging, contributing to environmental benefits.

[0003] The basic principle of wireless charging technology is as follows Figure 1 As shown in the figure, at the transmitter, AC power is first converted to DC. The power driver circuit then uses FSK modulation to transmit the data and power from the transmitting coil to the receiving coil. After the receiving coil receives the data, the AC rectifier converts it into an appropriate voltage and supplies it to the downstream load. Simultaneously, through FSK demodulation, the receiving control system can obtain the information provided by the transmitter. If the receiving load needs to be adjusted, the receiving control system modulates the information using ASK load modulation and then transmits it from the receiving coil to the transmitting coil via ASK communication.

[0004] The transmission control system uses ASK demodulation to determine the load requirements at the receiving end, thereby controlling the voltage and current. The appropriate power required by the receiving end is then transmitted from the transmitting coil to the receiving coil using FSK modulation. The receiving coil receives the power and then passes it through an AC rectifier to generate the required power. This is the basic principle of currently common wireless charging technology, but this circuit has a major problem. Because the ASK modulation rate is only a few kHz, it is suitable for fixed loads or loads that change infrequently. However, when the load changes frequently, such as when switching multiple effects in stage lighting, the power of each effect varies, and the fastest switching rate can reach 25 kHz. Due to the limitations of ASK modulation, traditional wireless charging technology cannot adjust the power supply in a timely manner, resulting in protection failure. Currently, wireless charging technology cannot be applied in scenarios with dynamic and rapid load switching. Utility Model Content

[0005] The purpose of the present invention is to provide a wireless charging dynamic load fast response circuit so as to cope with various dynamic load fast switching scenarios.

[0006] The wireless charging dynamic load rapid response circuit described in the present utility model includes a wireless charging receiving end control module and a wireless charging transmitting end control module; the wireless charging receiving end control module is provided with a receiving end microwave communication circuit, a receiving induction coil, and a receiving end control chip that controls the receiving end microwave communication circuit to be electrically connected to the wireless charging transmitting end control module via the receiving induction coil when the receiving end microwave communication circuit is in a receiving or sending data state; the wireless charging transmitting end control module is provided with a transmitting induction coil that is electrically connected to the receiving induction coil by mutual inductance, a transmitting end microwave communication circuit, and a transmitting end control chip that controls the transmitting end microwave communication circuit to be electrically connected to the wireless charging receiving end control module via the transmitting induction coil when the transmitting end microwave communication circuit is in a sending or receiving data state.

[0007] As a preferred solution of the present invention, the wireless charging receiving end control module is further provided with a voltage conversion chip that boosts the low voltage to the receiving end control chip.

[0008] As a preferred solution of the present invention, a II2C communication interface is provided between the voltage conversion chip and the receiving end control chip, and the voltage conversion chip is electrically connected to the receiving end control chip via the I2C communication interface.

[0009] As a preferred solution of the present invention, the B1 pin and the B2 pin of the voltage conversion chip are electrically connected to the II2C communication interface.

[0010] As a preferred solution of the present invention, the B1 pin and B2 pin of the voltage conversion chip and the II2C communication interface are provided with a first resistor and a second resistor, the first end of the first resistor is electrically connected to the B1 pin of the voltage conversion chip, and the other end is electrically connected to the second resistor, one end of the second resistor is electrically connected to the B2 pin of the voltage conversion chip, and the other end is electrically connected to the first resistor and connected to the II2C communication interface.

[0011] As a preferred solution of the present invention, the receiving-end microwave communication circuit includes a level conversion chip electrically connected to the receiving-end control chip, and a microwave signal conversion chip electrically connected to the level conversion chip.

[0012] As a preferred solution of the present invention, the level conversion chip includes a first level conversion chip and a second level conversion chip; the B2 pin of the first level conversion chip is electrically connected to the PA7 pin of the receiving end control chip through the interface RX_TX_MGT, the B1 pin of the first level conversion chip is electrically connected to the PA6 pin of the receiving end control chip through the interface 1V8_RESET, the A1 pin of the first level conversion chip is electrically connected to the CLK_FWKP pin of the microwave signal conversion chip through the interface RESET, and the A2 pin of the first level conversion chip is electrically connected to the RX_TX_MGT pin of the microwave signal conversion chip through the interface MGT; the B1 pin of the second level conversion chip is electrically connected to the PB0 pin of the receiving end control chip through the interface TX1, and the A1 pin of the second level conversion chip is electrically connected to the SYS_WKP pin of the microwave signal conversion chip through the interface SYS_WKP.

[0013] As a preferred solution of the present invention, the wireless charging transmitter control module is provided with a data selection chip, the Z pin of the data selection chip is electrically connected to the transmitter microwave communication circuit through the interface TXI, and the S pin of the data selection chip is electrically connected to the PB2 pin of the transmitter control chip through the interface RX_TX_MGT.

[0014] As a preferred solution of the present invention, the data selection chip is a two-choose-one data selection chip.

[0015] The wireless charging dynamic load fast response circuit described in the present invention, when the wireless charging receiving end control module controls the receiving end microwave communication circuit through the receiving end control chip to be in the data sending state, the wireless charging transmitting end control module sends data through the receiving induction coil, and the transmitting end control module controls the transmitting end microwave communication circuit through the transmitting end control chip to be in the data receiving state, and then receives the data sent by the wireless charging receiving end control module through the transmitting induction coil; when the wireless charging transmitting end control module controls the transmitting end microwave communication circuit through the transmitting end control chip to be in the data sending state, the wireless charging transmitting end control module sends data through the transmitting induction coil, and the receiving end control module controls the receiving end microwave communication circuit through the receiving end control chip to be in the data receiving state, and then receives the data sent by the wireless charging receiving end control module through the receiving induction coil. The induction coil receives the data sent by the wireless charging transmitter control module, so that the wireless charging transmitter and receiver can respond to each other more quickly. When facing a complex usage environment, different power levels can be switched more quickly to meet the needs of the back-end load, avoiding problems such as triggering protection or causing wireless charging failures due to mismatching issues. In addition, the wireless charging dynamic load fast response circuit greatly improves the flexibility of wireless charging technology, making wireless charging technology capable of various usage environments. It also significantly helps the performance of wireless charging technology. The more flexible change of power load is conducive to avoiding energy waste in wireless charging technology and reducing heat generation when wireless charging technology is used, making the wireless charging dynamic load fast response circuit a major improvement to wireless charging technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the current wireless charging technology;

[0017] Figure 2 This is a schematic diagram of the wireless charging dynamic load fast response circuit module of the utility model;

[0018] Figure 3 This is a circuit diagram of the wireless charging receiver control module;

[0019] Figure 4 This is a circuit diagram of a microwave communication circuit at the receiving end;

[0020] Figure 5 This is the circuit diagram of the wireless charging transmitter control module. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] This embodiment provides a wireless charging dynamic load fast response circuit, such as Figure 2 As shown, it includes a wireless charging receiving end control module 1 and a wireless charging transmitting end control module 2; the wireless charging receiving end control module is provided with a receiving end microwave communication circuit 3, a receiving induction coil 4 and a receiving end control chip U3 that controls the receiving end microwave communication circuit to be in a receiving or sending data state and is electrically connected to the wireless charging transmitting end control module through the receiving induction coil; the wireless charging transmitting end control module is provided with a transmitting induction coil 5 that is electrically connected to the receiving induction coil through mutual inductance, a transmitting end microwave communication circuit 6, and a transmitting end control chip U5 that controls the transmitting end microwave communication circuit to be in a sending or receiving data state and is electrically connected to the wireless charging receiving end control module through the transmitting induction coil.

[0023] like Figure 3 As shown, the wireless charging receiver control module also includes a voltage conversion chip U4 that boosts low voltage to the receiver control chip. A II2C communication interface J2 is provided between the voltage conversion chip and the receiver control chip, and the voltage conversion chip is electrically connected to the receiver control chip via the I2C communication interface. The B1 and B2 pins of the voltage conversion chip U4 are electrically connected to the II2C communication interface J2. The B1 and B2 pins of the voltage conversion chip U4 and the II2C communication interface J2 are provided with a first resistor R10 and a second resistor R13. The first resistor R10 has a first end electrically connected to the B1 pin of the voltage conversion chip U4 and the other end electrically connected to the second resistor R13. The second resistor R13 has one end electrically connected to the B2 pin of the voltage conversion chip U4 and the other end electrically connected to the first resistor R10 and connected to the II2C communication interface. The first resistor R10 and the second resistor R13 can be 4K7 resistors.

[0024] When the wireless charging receiver control module wants to send data, the voltage converter chip U4 boosts the 1.8V data to 3.3V. The data is then transmitted to the receiver control chip U3 via the II2C communication interface via pins B1 and B2. After receiving the data, the receiver control chip U3 transmits it via pin PB0 via interface TXI to the receiver microwave communication circuit. The receive and transmit states of the receiver microwave communication circuit are controlled by the control interface RX_TX_MGT. When the RX_TX_MGT interface is pulled high, the receiver microwave communication circuit is in the transmit state; when the RX_TX_MGT interface is pulled low, the receiver microwave communication circuit is in the receive state. Furthermore, the receiver control chip U3 can reset the receiver microwave communication circuit by pulling the control interface 1V8_RESET high. If the receiver microwave communication circuit malfunctions, the receiver control chip U3 can reset the circuit by pulling the 1V8_RESET interface high, resuming operation. The receiving end control chip U3 can use the control chip model LX32F103CBT7, and the voltage conversion chip U4 can use the voltage conversion chip model RS0102. In addition, the wireless charging receiving end control module also has interfaces J1 and J3 for connecting to the receiving end microwave communication circuit.

[0025] like Figure 4As shown, the receiving-end microwave communication circuit includes a level conversion chip electrically connected to the receiving-end control chip, and a microwave signal conversion chip SKA2P1 electrically connected to the level conversion chip. The level conversion chip includes a first level conversion chip U1 and a second level conversion chip U2; the B2 pin of the first level conversion chip U1 is electrically connected to the PA7 pin of the receiving end control chip U3 through the interface RX_TX_MGT, the B1 pin of the first level conversion chip U1 is electrically connected to the PA6 pin of the receiving end control chip U3 through the interface 1V8_RESET, the A1 pin of the first level conversion chip U1 is electrically connected to the CLK_FWKP pin of the microwave signal conversion chip SKA2P1 through the interface RESET, and the A2 pin of the first level conversion chip U1 is electrically connected to the RX_TX_MGT pin of the microwave signal conversion chip SKA2P1 through the interface MGT; the B1 pin of the second level conversion chip U2 is electrically connected to the PB0 pin of the receiving end control chip U3 through the interface TX1, and the A1 pin of the second level conversion chip U2 is electrically connected to the SYS_WKP pin of the microwave signal conversion chip SKA2P1 through the interface SYS_WKP. The microwave signal conversion chip SKA2P1 can use the microwave signal conversion chip model KA2P1, and the first level conversion chip U1 and the second level conversion chip U2 can use the level conversion chip model RS0102. The transmitting end microwave communication circuit is the same as the receiving end microwave communication circuit, also using the KA2P1 microwave signal conversion chip and two RS0102 level conversion chips.

[0026] like Figure 5 As shown, the wireless charging transmitter control module is equipped with a data selection chip U6. This chip uses a two-choose-one data selection chip. The Z pin of the data selection chip U6 is electrically connected to the transmitter microwave communication circuit 6 via the TXI interface, and the S pin of the data selection chip U6 is electrically connected to the PB2 pin of the transmitter control chip U5 via the RX_TX_MGT interface. The data selection chip U6 can be an AIP74LVC1G3157 data selection chip.

[0027] When the wireless charging receiver control module wants to send data to the wireless charging transmitter control module, the MGT interface of the receiver's microwave communication circuit will be pulled high, and the receiver's microwave communication circuit will enter the data transmission state, while the MGT interface of the transmitter's microwave communication circuit will be pulled low, and the transmitter's microwave communication circuit will enter the data reception state. Similarly, when the wireless charging transmitter control module wants to send data to the wireless charging receiver control module, the MGT interface of the transmitter's microwave communication circuit will be pulled high, and the transmitter's microwave communication circuit will enter the data transmission state, while the MGT interface of the receiver's microwave communication circuit will be pulled low, and the receiver's microwave communication circuit will enter the data reception state.

[0028] When the transmitter microwave communication circuit receives data, the microwave data is given to the interface TXI of the data selection chip U6. The data selection chip U6 uses a two-choice data selection chip. When the interface RX_TX_MGT is pulled high, the interface TXI will communicate with the interface TX. When the interface RX_TX_MGT is pulled low, the interface TXI will communicate with the interface RX. This can automatically distinguish which data is sent and which is received, eliminating the need for the transmitter control chip U5 to process and distinguish the data. After receiving the data, the transmitter control chip U5 will process the data and then transmit it through the interface TX / RX. When the wireless charging transmitter control module wants to send data, it is processed by the transmitter control chip U5, and then the transmitter microwave communication circuit sends it to the wireless charging receiver control module via the transmitting induction coil 5.

[0029] The above embodiments are merely illustrative of the detailed embodiments of the present invention. The present invention is not limited to the detailed embodiments described above, nor does it imply that the present invention must rely on the detailed embodiments described above in order to be implemented. Persons skilled in the art should understand that any improvements to the present invention, equivalent replacements of raw materials for the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A wireless charging dynamic load fast response circuit, characterized in that: The invention comprises a wireless charging receiving end control module (1) and a wireless charging transmitting end control module (2); the wireless charging receiving end control module is provided with a receiving end microwave communication circuit (3), a receiving induction coil (4), and a receiving end control chip (U3) which controls the receiving end microwave communication circuit to be in a receiving or transmitting data state and electrically connected to the wireless charging transmitting end control module via the receiving induction coil; the wireless charging transmitting end control module is provided with a transmitting induction coil (5) which is mutually electrically connected to the receiving induction coil, a transmitting end microwave communication circuit (6), and a transmitting end control chip (U5) which controls the transmitting end microwave communication circuit to be in a transmitting or receiving data state and electrically connected to the wireless charging receiving end control module via the transmitting induction coil.

2. The wireless charging dynamic load fast response circuit according to claim 1, characterized in that: The wireless charging receiving end control module is also provided with a voltage conversion chip (U4) for boosting the low voltage to the receiving end control chip.

3. The wireless charging dynamic load fast response circuit according to claim 2, characterized in that: A II2C communication interface (J2) is provided between the voltage conversion chip and the receiving end control chip, and the voltage conversion chip is electrically connected to the receiving end control chip via the I2C communication interface.

4. The wireless charging dynamic load fast response circuit according to claim 3, characterized in that: The B1 pin and the B2 pin of the voltage conversion chip (U4) are electrically connected to the II2C communication interface (J2).

5. The wireless charging dynamic load fast response circuit according to claim 4, characterized in that: The B1 pin and the B2 pin of the voltage conversion chip (U4) and the II2C communication interface (J2) are provided with a first resistor (R10) and a second resistor (R13); a first end of the first resistor (R10) is electrically connected to the B1 pin of the voltage conversion chip (U4), and the other end is electrically connected to the second resistor (R13); one end of the second resistor (R13) is electrically connected to the B2 pin of the voltage conversion chip (U4), and the other end is electrically connected to the first resistor (R10) and connected to the II2C communication interface.

6. The wireless charging dynamic load fast response circuit according to claim 1, characterized in that: The receiving-end microwave communication circuit includes a level conversion chip electrically connected to the receiving-end control chip, and a microwave signal conversion chip (SKA2P1) electrically connected to the level conversion chip.

7. The wireless charging dynamic load fast response circuit according to claim 6, characterized in that: The level conversion chip comprises a first level conversion chip (U1) and a second level conversion chip (U2); the B2 pin of the first level conversion chip (U1) is electrically connected to the PA7 pin of the receiving end control chip (U3) through the interface RX_TX_MGT, the B1 pin of the first level conversion chip (U1) is electrically connected to the PA6 pin of the receiving end control chip (U3) through the interface 1V8_RESET, and the A1 pin of the first level conversion chip (U1) is electrically connected to the microwave signal conversion chip (SKA2P) through the interface RESET. 1), the A2 pin of the first level conversion chip (U1) is electrically connected to the RX_TX_MGT pin of the microwave signal conversion chip (SKA2P1) through the interface MGT; the B1 pin of the second level conversion chip (U2) is electrically connected to the PB0 pin of the receiving end control chip (U3) through the interface TX1, and the A1 pin of the second level conversion chip (U2) is electrically connected to the SYS_WKP pin of the microwave signal conversion chip (SKA2P1) through the interface SYS_WKP.

8. The wireless charging dynamic load fast response circuit according to claim 1, characterized in that: The wireless charging transmitter control module is provided with a data selection chip (U6), the Z pin of the data selection chip (U6) is electrically connected to the transmitter microwave communication circuit (6) via the interface TXI, and the S pin of the data selection chip (U6) is electrically connected to the PB2 pin of the transmitter control chip (U5) via the interface RX_TX_MGT.

9. The wireless charging dynamic load fast response circuit according to claim 8, characterized in that: The data selection chip (U6) is a two-choose-one data selection chip.

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