Multi-transmitting-coil one-to-many charging system for wireless charging and power supply

Abstract

The invention provides a multi-transmitting-coil one-to-many charging system for wireless charging and power supply, which belongs to the technical field of wireless power transmission and comprises a wireless transmitting end and a wireless receiving end in coupling connection with the wireless transmitting end. The one-to-many charging system wirelessly charges and supplies power to all devices placed in the transmitting end space at the same time, and has good charging efficiency. The transmitting end is in a three-dimensional shape such as a cuboid, a cube and a cylinder, and the receiving end is an electric device in a three-dimensional shape made of a metal or plastic material. Compared with a traditional wireless charging system, the wireless charging system gets rid of the limitation of a planar coil on charging of the planar coil, can normally charge the electric equipment when receiving the electric equipment made of a metal shell material, also gets rid of the limitation of traditional charging on metal, and is wider in adaptability of the receiving equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless power transmission, and in particular relates to a one-to-many charging system with multiple transmitting coils for wireless charging and power supply. Background Art

[0002] With the continuous development of industries such as electronic information technology, automation control technology, the Internet of Things, and smart homes, various electronic products such as household appliances, game consoles, and mobile communication devices have become widely popular. Various electronic devices need to be powered, including many battery-powered electronic products. If each electronic product is powered separately, it will not only be troublesome to operate, time-consuming and labor-intensive, and occupy space, but also different brands of chargers will also pose safety hazards. Therefore, this invention can not only accommodate all electronic products of different models in the three-dimensional space, but also wirelessly charge each device while storing items in the three-dimensional space. This not only saves manpower and space, but also greatly improves the charging efficiency of electronic products and reduces charging safety hazards. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a one-to-many charging system with multiple transmitting coils for wireless charging and power supply, which solves the problem that the charging of existing electronic products is cumbersome, different charging methods between products result in a large waste of charger resources, and there are safety hazards. It is also inconvenient to organize and store.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is: a multi-transmitting coil one-to-many charging system for wireless charging and power supply, comprising a wireless transmitting end and a wireless receiving end coupled to the wireless transmitting end; The wireless transmitting end includes a transmitting end controller, a transmitting forward excitation antenna, a transmitting reverse excitation antenna, a first transmitting relay antenna and a second transmitting relay antenna; the transmitting end controller, the transmitting forward excitation antenna and the transmitting reverse excitation antenna are connected in sequence; the first transmitting relay antenna is located directly above the transmitting forward excitation antenna and the transmitting reverse excitation antenna; the second transmitting relay antenna is located within the internal space of the first transmitting relay antenna, dividing the first transmitting relay antenna into three-dimensional space areas of different sizes; The wireless receiving end is a three-dimensional receiving electrical device body made of a metal shell material that cannot be penetrated by a magnetic field, a magnetic shielding material with a fixed thickness that allows the magnetic field to pass through and is arranged on the outer surface of the three-dimensional receiving electrical device body made of a metal shell material, a receiving antenna arranged on the surface of the magnetic shielding material, and a receiving controller arranged at one end of the receiving electrical device body made of a metal shell material; the receiving electrical device body, the magnetic shielding material and the receiving antenna are tightly bonded and fixed together in sequence, and the receiving controller is fixed on the outer surface of the receiving electrical device body; The transmitting end controller is connected to the receiving controller by wireless communication; the transmitting forward excitation antenna, the transmitting reverse excitation antenna, the first transmitting relay antenna, the second transmitting relay antenna and the receiving antenna are coupled through the space magnetic field.

[0005] Furthermore, the transmitter controller is used to drive the driving signal of the wireless transmitter, wherein the driving mode is to modulate pulse width modulation PWM and pulse frequency modulation PFM simultaneously.

[0006] Furthermore, the modulation circuit of the driving signal includes a control chip U15, a control chip U14, a control chip U8, a control chip U13 and a control chip U7; The VDD pin of the control chip U15 is respectively connected to one end of the resistor R38, one end of the resistor R84, the network CLK_3V0, the grounding capacitor C64, the grounding capacitor C63 and the negative electrode of the diode D15, the SCL pin of the control chip U15 is respectively connected to the other end of the resistor R83 and the network I2C_SCL, the SDA pin of the control chip U15 is respectively connected to the other end of the resistor R84 and the network I2C_SDA, the XA pin of the control chip U15 is respectively connected to the 1st pin of the crystal oscillator Y1 and the grounding capacitor C72, the XB pin of the control chip U15 is respectively connected to the 3rd pin of the crystal oscillator Y1 and the grounding capacitor C70, the CLK2 pin of the control chip U15 The control chip U15 is connected to one end of the resistor R77, the VDD0 pin of the control chip U15 is connected to the positive electrode of the diode D13, the other end of the resistor R77 is respectively connected to one end of the resistor R73 and one end of the resistor R72, the other end of the resistor R73 is respectively connected to the A pin of the control chip U14 and the B pin of the control chip U14, the + pin of the control chip U14 is respectively connected to the network LOG_3V3, the grounding capacitor C52 and the grounding capacitor C51, the - pin of the control chip U14 is grounded, the Y pin of the control chip U14 is connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to the grounding capacitor C42 and one end of the resistor R62, the other end of the resistor R62 is respectively connected to the grounding capacitor C40 And one end of the resistor R52 is connected, the other end of the resistor R52 is connected to the + pin of the control chip U8, the - pin of the control chip U8 is connected to one end of the resistor R47, the other end of the resistor R47 is connected to the network REF_ADC, the V- pin of the control chip U8 is grounded, the V+ pin of the control chip U8 is respectively connected to the grounding capacitor C32 and the network LOG_3V3, the 4th pin of the control chip U8 is connected to one end of the resistor R33, the other end of the resistor R33 outputs the first modulation signal, the other end of the resistor R72 is connected to the A pin of the control chip U13, the + pin of the control chip U13 is respectively connected to the network LOG_3V3, the grounding capacitor C50 and the grounding capacitor C49, the The - pin of the control chip U13 is grounded, the Y pin of the control chip U13 is connected to one end of the resistor R66, the other end of the resistor R66 is respectively connected to the grounded capacitor C41 and one end of the resistor R61, the other end of the resistor R61 is respectively connected to the grounded capacitor C39 and one end of the resistor R51, the other end of the resistor R51 is connected to the + pin of the control chip U7, the - pin of the control chip U7 is connected to one end of the resistor R46, the other end of the resistor R46 is connected to the network REF_ADC, the V- pin of the control chip U7 is grounded, the V+ pin of the control chip U7 is respectively connected to the grounded capacitor C31 and the network LOG_3V3, the 4th pin of the control chip U7 is connected to one end of the resistor R35,The other end of the resistor R35 outputs a second modulation signal.

[0007] Furthermore, the transmitting forward excitation antenna and the transmitting reverse excitation antenna convert electrical energy into a loose electromagnetic field distributed in the area directly above the antenna.

[0008] Furthermore, the transmitting coil of the wireless transmitting end utilizes the mutual coupling between the transmitting forward excitation antenna, the transmitting reverse excitation antenna, the first transmitting relay antenna and the second transmitting relay antenna to make the three-dimensional space magnetic field distribution balanced.

[0009] Furthermore, the antenna winding method of the wireless receiving end is: the antenna is wound on the outer surface of the three-dimensional receiving electrical equipment body made of metal shell material, and the magnetic shielding material is used to protect the internal metal from magnetic field radiation. At the same time, the magnetic shielding material with a fixed thickness between the metal and the antenna forms a three-dimensional space for the magnetic field to pass through, so that the antenna and the magnetic field are in an orthogonal direction to cut the magnetic lines of force and obtain magnetic field energy.

[0010] Furthermore, there are multiple wireless receiving ends, wherein all the wireless receiving ends can work normally at the same time and have balanced load capacity within the magnetic field range of the transmitting space.

[0011] The beneficial effects of the present invention are: (1) The present invention uses a three-dimensional transmitting end to convert DC power into an electromagnetic field. When the receiving end with a receiving antenna is placed inside the three-dimensional transmitting end antenna system, the receiving antenna couples to the electromagnetic field of the transmitting antenna and converts the electromagnetic field into DC power through the receiving controller, and then powers the electrical equipment inside the receiving end, so that the electrical equipment is in a stable working state or charging state. The invention no longer requires the tedious matter of charging different devices every day, and at the same time eliminates the need for chargers of different specifications and models, reduces the user's usage cost and greatly reduces resource waste.

[0012] (2) The transmitting end of the present invention uses a multi-coil transmitting system, namely, a transmitting forward excitation antenna, a transmitting reverse excitation antenna, a first transmitting relay antenna, and a second transmitting relay antenna, wherein the transmitting forward excitation antenna and the transmitting reverse excitation antenna can widely distribute the magnetic field in the three-dimensional space above the transmitting coil. Secondly, the first transmitting relay antenna recouples and distributes the magnetic field to achieve a relatively balanced distribution state. Secondly, the second transmitting relay antenna further recouples and evenly distributes the magnetic field, and finally makes the transmitting end magnetic field reach a completely balanced distribution state in the three-dimensional space. When the receiving antenna is placed at any position in the area, it can capture the same amount of magnetic field, thereby ensuring that the receiving controller has the same load capacity at any position in the three-dimensional space. Compared with the face-to-face charging system of the traditional transmitting system, the multi-coil coupling system can achieve a balanced distribution of the magnetic field in the three-dimensional space, thereby realizing three-dimensional space charging, and the charging effect is more consistent.

[0013] (3) The winding method of the receiving end of the present invention is to bond the receiving electrical equipment body, magnetic shielding material, and receiving antenna coil together in sequence, wherein the magnetic shielding material can protect the internal metal from being radiated by the magnetic field and thus generating heat, and at the same time allow the magnetic field to pass between the metal and the antenna, thereby obtaining magnetic field energy. Compared with the problem that the traditional metal receiving electrical equipment body cannot be charged and the metal shell generates heat, this invention can completely solve this problem without causing damage to the receiving electrical equipment body.

[0014] (4) The transmitter drive mode of the present invention adopts two drive modes: pulse width modulation (PWM) and pulse frequency modulation (PFM). Pulse frequency modulation (PFM) can quickly adjust the drive frequency, so as to timely respond to the RX power demand, output the required power, and achieve the purpose of "coarse adjustment". Pulse width modulation (PWM) has little effect on the antenna power. This adjustment method can slowly and accurately adjust the output power to the required target value, protect the back-end electrical equipment from damage such as overvoltage and overcurrent, and achieve the purpose of "fine adjustment".

[0015] (5) The design concept of the present invention is to achieve balanced distribution of magnetic field by coupling multiple coils. This design concept can design the size of the transmitting end to be any size and shape, and the number of relay antennas can be increased or decreased according to the actual use effect, which increases the design flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 4 is a schematic diagram of a transmitting antenna system provided in an embodiment of the present invention.

[0017] Figure 2 Shown is a schematic diagram of a transmitting forward excitation antenna and a transmitting reverse excitation antenna provided in an embodiment of the present invention.

[0018] Figure 3FIG. 4 is a schematic diagram of a receiving antenna system provided in an embodiment of the present invention.

[0019] Figure 4 FIG. 1 is a schematic diagram of the system operation provided by an embodiment of the present invention.

[0020] Figure 5 The figure shows a system block diagram of a one-to-many charging system with multiple transmitting coils for wireless charging and power supply provided by an embodiment of the present invention.

[0021] Figure 6 The figure shows a schematic diagram of a pulse width modulation (PWM) and pulse frequency modulation (PFM) circuit provided by an embodiment of the present invention.

[0022] Among them, 11, transmitting end controller; 12, transmitting forward excitation antenna; 13, transmitting reverse excitation antenna; 14, first transmitting relay antenna; 15, second transmitting relay antenna; 16, overall schematic diagram of receiving end; 21, receiving electrical equipment body; 22, magnetic shielding material; 23, receiving antenna; 24, receiving controller. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0024] Example Before describing the present invention, the following terms are explained: CLK_3V0: driving signal 3.0V power port; Network I2C_SCL: I2C communication clock signal port; Network I2C_SDA: I2C communication data signal line port; Network LOG_3V3: logic signal 3.3V power port; Network REF_ADC: reference voltage sampling port.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the present invention provides a multi-transmitting coil one-to-many charging system for wireless charging and power supply, including a wireless transmitting end and a wireless receiving end coupled to the wireless transmitting end; The wireless transmitting end includes a transmitting end controller 11, a transmitting forward excitation antenna 12, a transmitting reverse excitation antenna 13, a first transmitting relay antenna 14 and a second transmitting relay antenna 15; the transmitting end controller 11, the transmitting forward excitation antenna 12 and the transmitting reverse excitation antenna 13 are connected in sequence; the first transmitting relay antenna 14 is located directly above the transmitting forward excitation antenna 12 and the transmitting reverse excitation antenna 13; the second transmitting relay antenna 15 is located within the internal space of the first transmitting relay antenna 14, dividing the first transmitting relay antenna 14 into three-dimensional space areas of different sizes; The wireless receiving end is usually a three-dimensional receiving electrical device body 21 made of a metal shell material that cannot be penetrated by a magnetic field, a magnetic shielding material 22 with a fixed thickness that allows the magnetic field to pass through and arranged on the outer surface of the three-dimensional receiving electrical device body 21 made of a metal shell material, a receiving antenna 23 arranged on the surface of the magnetic shielding material 22, and a receiving controller 24 arranged at one end of the receiving electrical device body 21 made of a metal shell material; the receiving electrical device body 21, the magnetic shielding material 22 and the receiving antenna 23 are tightly bonded and fixed together in sequence, and the receiving controller 24 is fixed on the outer surface of the receiving electrical device body 21; The transmitting end controller 11 is connected to the receiving controller 24 for wireless communication; the transmitting forward excitation antenna 12, the transmitting reverse excitation antenna 13, the first transmitting relay antenna 14, the second transmitting relay antenna 15 and the receiving antenna 23 are coupled through the space magnetic field.

[0026] In this embodiment, the transmitting coil uses a transmitting forward excitation antenna 12, a transmitting reverse excitation antenna 13, a first transmitting relay antenna 14, and a second transmitting relay antenna 15. The multiple antennas are coupled with each other to make the three-dimensional magnetic field distribution completely balanced, while improving the energy conversion efficiency of the antenna system.

[0027] In this embodiment, the wireless transmitting antenna is formed by a plurality of coils coupled to each other, which enables the transmitting antenna to be of any size and shape while ensuring that the system works normally.

[0028] In this embodiment, the second transmitting relay antenna 15 is located within the internal space of the first transmitting relay antenna 14, dividing the first transmitting relay antenna 14 into space regions of different sizes, so that the three-dimensional space magnetic field distribution is completely balanced, thereby realizing three-dimensional space charging, and achieving a good charging effect at any position in the relay magnetic field space, and achieving a higher charging efficiency.

[0029] In this embodiment, the transmitter controller 11 is used to drive the driving signal of the wireless transmitter, wherein the driving mode is to modulate pulse width modulation PWM and pulse frequency modulation PFM simultaneously.

[0030] In this embodiment, Figure 6As shown, the driving signal is a pulse width modulation PWM and a pulse frequency modulation PFM. This modulation circuit includes a driving waveform conversion circuit, a driving waveform duty cycle modulation circuit, and peripheral circuits specifically as follows: The modulation circuit of the driving signal includes a control chip U15, a control chip U14, a control chip U8, a control chip U13 and a control chip U7; The VDD pin of the control chip U15 is respectively connected to one end of the resistor R38, one end of the resistor R84, the network CLK_3V0, the grounding capacitor C64, the grounding capacitor C63 and the negative electrode of the diode D15, the SCL pin of the control chip U15 is respectively connected to the other end of the resistor R83 and the network I2C_SCL, the SDA pin of the control chip U15 is respectively connected to the other end of the resistor R84 and the network I2C_SDA, the XA pin of the control chip U15 is respectively connected to the 1st pin of the crystal oscillator Y1 and the grounding capacitor C72, the XB pin of the control chip U15 is respectively connected to the 3rd pin of the crystal oscillator Y1 and the grounding capacitor C70, the CLK2 pin of the control chip U15 The control chip U15 is connected to one end of the resistor R77, the VDD0 pin of the control chip U15 is connected to the positive electrode of the diode D13, the other end of the resistor R77 is respectively connected to one end of the resistor R73 and one end of the resistor R72, the other end of the resistor R73 is respectively connected to the A pin of the control chip U14 and the B pin of the control chip U14, the + pin of the control chip U14 is respectively connected to the network LOG_3V3, the grounding capacitor C52 and the grounding capacitor C51, the - pin of the control chip U14 is grounded, the Y pin of the control chip U14 is connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to the grounding capacitor C42 and one end of the resistor R62, the other end of the resistor R62 is respectively connected to the grounding capacitor C40 And one end of the resistor R52 is connected, the other end of the resistor R52 is connected to the + pin of the control chip U8, the - pin of the control chip U8 is connected to one end of the resistor R47, the other end of the resistor R47 is connected to the network REF_ADC, the V- pin of the control chip U8 is grounded, the V+ pin of the control chip U8 is respectively connected to the grounding capacitor C32 and the network LOG_3V3, the 4th pin of the control chip U8 is connected to one end of the resistor R33, the other end of the resistor R33 outputs the first modulation signal, the other end of the resistor R72 is connected to the A pin of the control chip U13, the + pin of the control chip U13 is respectively connected to the network LOG_3V3, the grounding capacitor C50 and the grounding capacitor C49, the The - pin of the control chip U13 is grounded, the Y pin of the control chip U13 is connected to one end of the resistor R66, the other end of the resistor R66 is respectively connected to the grounded capacitor C41 and one end of the resistor R61, the other end of the resistor R61 is respectively connected to the grounded capacitor C39 and one end of the resistor R51, the other end of the resistor R51 is connected to the + pin of the control chip U7, the - pin of the control chip U7 is connected to one end of the resistor R46, the other end of the resistor R46 is connected to the network REF_ADC, the V- pin of the control chip U7 is grounded, the V+ pin of the control chip U7 is respectively connected to the grounded capacitor C31 and the network LOG_3V3, the 4th pin of the control chip U7 is connected to one end of the resistor R35,The other end of the resistor R35 outputs a second modulation signal.

[0031] In this embodiment, the transmitting forward excitation antenna 12 and the transmitting reverse excitation antenna 13 convert electrical energy into loose electromagnetic fields distributed in the area directly above the antennas, so as to initially converge and balance the electromagnetic fields above the antennas.

[0032] In this embodiment, the transmitting coil of the wireless transmitting end utilizes the mutual coupling between the transmitting forward excitation antenna 12, the transmitting reverse excitation antenna 13, the first transmitting relay antenna 14 and the second transmitting relay antenna 15 to make the three-dimensional space magnetic field distribution balanced.

[0033] In this embodiment, the antenna winding method of the wireless receiving end is: the antenna is wound on the outer surface of a three-dimensional receiving electrical equipment body 21 made of a metal shell material, and the magnetic shielding material 22 is used to protect the internal metal from magnetic field radiation. At the same time, the magnetic shielding material 22 with a fixed thickness between the metal and the antenna forms a three-dimensional space for the magnetic field to pass through, so that the antenna and the magnetic field are in an orthogonal direction to cut the magnetic lines of force and obtain magnetic field energy.

[0034] In this embodiment, the receiving end antenna is wound around the outer surface of the receiving electrical device body 21, that is, the receiving electrical device body 21, the magnetic shielding material 22, and the receiving antenna 23 are glued and fixed together in sequence, and the receiving controller 24 is fixed to the outer surface of the receiving electrical device body 21. Among them, the magnetic shielding material 22 can protect the internal metal from heating caused by magnetic field radiation, and at the same time allow the magnetic field to pass between the metal and the antenna, thereby obtaining magnetic field energy. Compared with the traditional metal receiving electrical device body that cannot be charged and the metal shell heating problem, this invention can completely solve this problem without causing damage to the receiving electrical device body.

[0035] In this embodiment, there are multiple wireless receiving ends, wherein all the wireless receiving ends can work normally at the same time and have balanced load capacity within the magnetic field range of the transmitting space.

[0036] In this embodiment, the specific structures of the LC resonant matching circuit of the wireless transmitting antenna and the LC resonant matching circuit of the wireless receiving antenna are common knowledge in the art and will not be described in detail herein.

[0037] In this embodiment, the driving circuit of the wireless transmitting antenna and the rectifying and filtering circuit of the wireless receiving antenna are common knowledge in the art and will not be described in detail herein.

[0038] In this embodiment, Figure 5As shown, the working principle and specific process of the wireless charging and power supply system are as follows: during normal operation, the external power supply supplies electric energy to the transmitter controller 11 through the power line. After the transmitter system is started normally, the transmitter controller 11 converts the electric energy into an electromagnetic field through the transmitting forward excitation antenna 12 and the transmitting reverse excitation antenna 13. When the first transmitting relay antenna 14 is coupled to the electromagnetic field of the transmitter, the magnetic field is redistributed and arranged. At this time, the distribution of the electromagnetic field will become more balanced. When the second transmitting relay antenna 15 is coupled to the electromagnetic field distributed by the first transmitting relay antenna 14, the magnetic field distribution is arranged for the third time. At this time, the magnetic field in the space of the second transmitting relay antenna 15 has been completely evenly distributed. When the receiving antenna 23 enters the magnetic field distribution area of ​​the second transmitting relay antenna 15, it is coupled to the transmitting magnetic field. Through the internal circuit of the receiving controller 24, the coupled electromagnetic field is converted into a stable DC power supply to supply the back-end load. At the same time, the receiving controller 24 coordinates the power output with the transmitting controller 11 according to the back-end load requirements to maintain the stable operation of the system. In addition, since the distribution of the transmitting magnetic field of this system is completely balanced after the secondary relay, the receiving device can output stably within the magnetic field distribution range of the second transmitting relay antenna 15, and will not cause abnormal phenomena such as excessive or weak load capacity, overvoltage and overcurrent due to uneven magnetic field distribution, thereby ensuring the stable and normal operation of the back-end load. Figure 5 The receiving electrical equipment body 21 refers to the part of the entire receiving equipment that actually consumes electrical energy except the receiving antenna system. The receiving end antenna directly supplies electrical energy to the receiving electrical equipment body 21 .

[0039] In this embodiment, Figure 4 The closed or unclosed circle in the figure represents the magnetic field emitted by the antenna, also called magnetic lines of force. The antenna on the shell is larger and covers a larger area, so the magnetic field circle is drawn larger; the antenna at the bottom is smaller, so the drawn circle is also smaller, indicating that the magnetic field is weak and the coverage area is small.

[0040] Through the workflow described above, the present invention can not only realize the storage of electronic products, but also solve the charging problem of electronic products, and can also save chargers of different models and specifications, thereby playing a role in green environmental protection and resource conservation.

[0041] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A one-to-many charging system with multiple transmitting coils for wireless charging and power supply, characterized in that: It includes a wireless transmitting end and a wireless receiving end coupled to the wireless transmitting end; The wireless transmitting end comprises a transmitting end controller (11), a transmitting forward excitation antenna (12), a transmitting reverse excitation antenna (13), a first transmitting relay antenna (14) and a second transmitting relay antenna (15); the transmitting end controller (11), the transmitting forward excitation antenna (12) and the transmitting reverse excitation antenna (13) are connected in sequence; the first transmitting relay antenna (14) is located directly above the transmitting forward excitation antenna (12) and the transmitting reverse excitation antenna (13); The second transmitting relay antenna (15) is located within the internal space of the first transmitting relay antenna (14), dividing the first transmitting relay antenna (14) into three-dimensional space areas of different sizes; The wireless receiving end is a three-dimensional receiving electrical device body (21) made of a metal shell material that is impenetrable by a magnetic field, a magnetic shielding material (22) arranged on the outer surface of the three-dimensional receiving electrical device body (21) made of a metal shell material and having a fixed thickness that allows the magnetic field to pass through, a receiving antenna (23) arranged on the surface of the magnetic shielding material (22), and a receiving controller (24) arranged at one end of the receiving electrical device body (21) made of a metal shell material; the receiving electrical device body (21), the magnetic shielding material (22), and the receiving antenna (23) are tightly bonded and fixed together in sequence, and the receiving controller (24) is fixed to the outer surface of the receiving electrical device body (21); The transmitting end controller (11) is wirelessly connected to the receiving controller (24); the transmitting forward excitation antenna (12), the transmitting reverse excitation antenna (13), the first transmitting relay antenna (14), the second transmitting relay antenna (15) and the receiving antenna (23) are coupled via a spatial magnetic field.

2. The multi-transmitting coil one-to-many charging system for wireless charging and power supply according to claim 1, characterized in that: The transmitter controller (11) is used to drive the driving signal of the wireless transmitter, wherein the driving mode is pulse width modulation (PWM) and pulse frequency modulation (PFM) are modulated simultaneously.

3. The multi-transmitter coil one-to-many charging system for wireless charging and power supply according to claim 2, characterized in that: The modulation circuit of the driving signal includes a control chip U15, a control chip U14, a control chip U8, a control chip U13 and a control chip U7; The VDD pin of the control chip U15 is respectively connected to one end of the resistor R38, one end of the resistor R84, the network CLK_3V0, the grounding capacitor C64, the grounding capacitor C63 and the negative electrode of the diode D15, the SCL pin of the control chip U15 is respectively connected to the other end of the resistor R83 and the network I2C_SCL, the SDA pin of the control chip U15 is respectively connected to the other end of the resistor R84 and the network I2C_SDA, the XA pin of the control chip U15 is respectively connected to the 1st pin of the crystal oscillator Y1 and the grounding capacitor C72, the XB pin of the control chip U15 is respectively connected to the 3rd pin of the crystal oscillator Y1 and the grounding capacitor C70, the CLK2 pin of the control chip U15 The control chip U15 is connected to one end of the resistor R77, the VDD0 pin of the control chip U15 is connected to the positive electrode of the diode D13, the other end of the resistor R77 is respectively connected to one end of the resistor R73 and one end of the resistor R72, the other end of the resistor R73 is respectively connected to the A pin of the control chip U14 and the B pin of the control chip U14, the + pin of the control chip U14 is respectively connected to the network LOG_3V3, the grounding capacitor C52 and the grounding capacitor C51, the - pin of the control chip U14 is grounded, the Y pin of the control chip U14 is connected to one end of the resistor R67, the other end of the resistor R67 is respectively connected to the grounding capacitor C42 and one end of the resistor R62, the other end of the resistor R62 is respectively connected to the grounding capacitor C40 And one end of the resistor R52 is connected, the other end of the resistor R52 is connected to the + pin of the control chip U8, the - pin of the control chip U8 is connected to one end of the resistor R47, the other end of the resistor R47 is connected to the network REF_ADC, the V- pin of the control chip U8 is grounded, the V+ pin of the control chip U8 is respectively connected to the grounding capacitor C32 and the network LOG_3V3, the 4th pin of the control chip U8 is connected to one end of the resistor R33, the other end of the resistor R33 outputs the first modulation signal, the other end of the resistor R72 is connected to the A pin of the control chip U13, the + pin of the control chip U13 is respectively connected to the network LOG_3V3, the grounding capacitor C50 and the grounding capacitor C49, the The - pin of the control chip U13 is grounded, the Y pin of the control chip U13 is connected to one end of the resistor R66, the other end of the resistor R66 is respectively connected to the grounded capacitor C41 and one end of the resistor R61, the other end of the resistor R61 is respectively connected to the grounded capacitor C39 and one end of the resistor R51, the other end of the resistor R51 is connected to the + pin of the control chip U7, the - pin of the control chip U7 is connected to one end of the resistor R46, the other end of the resistor R46 is connected to the network REF_ADC, the V- pin of the control chip U7 is grounded, the V+ pin of the control chip U7 is respectively connected to the grounded capacitor C31 and the network LOG_3V3, the 4th pin of the control chip U7 is connected to one end of the resistor R35,The other end of the resistor R35 outputs a second modulation signal.

4. The multi-transmitter coil one-to-many charging system for wireless charging and power supply according to claim 1, characterized in that: The transmitting forward excitation antenna (12) and the transmitting reverse excitation antenna (13) convert electrical energy into loose electromagnetic fields that are distributed in the area directly above the antennas.

5. The multi-transmitter coil one-to-many charging system for wireless charging and power supply according to claim 1, characterized in that: The transmitting coil of the wireless transmitting end utilizes mutual coupling between a transmitting forward excitation antenna (12), a transmitting reverse excitation antenna (13), a first transmitting relay antenna (14) and a second transmitting relay antenna (15) to achieve balanced distribution of the three-dimensional magnetic field.

6. The multi-transmitter coil one-to-many charging system for wireless charging and power supply according to claim 1, characterized in that: The antenna winding method of the wireless receiving end is as follows: the antenna is wound on the outer surface of a three-dimensional receiving electrical equipment body (21) made of a metal shell material, the magnetic shielding material (22) is used to protect the internal metal from magnetic field radiation, and at the same time, the magnetic shielding material (22) with a fixed thickness between the metal and the antenna forms a three-dimensional space for the magnetic field to pass through, so that the antenna and the magnetic field are in an orthogonal direction, so as to cut the magnetic flux lines and obtain magnetic field energy.

7. The multi-transmitter coil one-to-many charging system for wireless charging and power supply according to claim 1, characterized in that: There are multiple wireless receiving ends, wherein all the wireless receiving ends can work normally at the same time and have balanced load capacity within the magnetic field range of the transmitting space.

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