A strong magnetic force wireless charging structure and system

Abstract

The utility model discloses a kind of strong magnetic force wireless charging structure and system, including magnetic attraction piece, the magnetic attraction piece working surface magnetic induction intensity is 4000 Gauss~5000 Gauss, the magnetic attraction piece is residual annular, the magnetic attraction piece includes multiple magnetic attraction ring, the magnetic attraction ring is composed of multiple magnetic attraction monomer.The utility model makes wireless charging receiving end and transmitting end more stable by enhancing magnet suction force, reduce displacement when charging, improve charging efficiency and stability;In the utility model, power input end has multiple voltage access mode and protocol support, and power conversion module and charging control module work cooperatively, improve the performance and compatibility of wireless charging system.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and more specifically, to a strong magnetic wireless charging structure and system. Background Technology

[0002] Traditional wireless charging structures often use magnetic components with low magnetic induction intensity on their working surfaces, making it difficult to ensure stable attachment of devices during charging. For example, when using a wireless charger to charge a phone in daily life, even a slight external force can cause the phone to shift, resulting in inaccurate alignment of the charging coils, reduced charging efficiency, or even charging interruptions. This not only affects the user's charging experience but can also damage the battery due to frequent charging interruptions.

[0003] The above shortcomings need to be improved. Summary of the Invention

[0004] To address or alleviate the problem of insufficient magnetic attraction force in existing wireless charging structures, this invention provides a strong magnetic wireless charging structure and system.

[0005] The technical solution of this utility model is as follows:

[0006] A strong magnetic wireless charging structure includes a magnetic suction component, wherein the magnetic induction intensity of the working surface of the magnetic suction component is 4000 Gauss to 5000 Gauss.

[0007] Furthermore, the magnetic attractant is ring-shaped, and includes multiple magnetic rings, each composed of multiple magnetic units.

[0008] Furthermore, the thickness of the magnetic suction element is 2.2mm to 2.8mm.

[0009] A strong magnetic wireless charging system, employing the aforementioned strong magnetic wireless charging structure, includes:

[0010] A power conversion module that converts the input power voltage into a voltage suitable for wireless charging;

[0011] A charging control module that controls the wireless charging process.

[0012] Furthermore, the power conversion module includes:

[0013] The power input terminal includes a first interface for connecting a preset DC voltage and a second interface for upgrading software.

[0014] A power conversion unit, comprising a voltage conversion control chip and a DC-DC conversion circuit connected between the power input terminal and the power output terminal, wherein the charging control module controls the voltage conversion control chip and the voltage conversion control chip controls the DC-DC conversion circuit;

[0015] The power output terminal is used to supply power to the wireless charging bridge.

[0016] Furthermore, the first interface can be directly connected to a power source or connected to a power source via an adapter.

[0017] Furthermore, the charging control module includes:

[0018] The main controller is used for the overall control of the charging process;

[0019] The resonant unit, wherein some resonant elements of the resonant unit can be switched on or off by a switch to adapt to different charging modes;

[0020] A data interaction unit, which is used to transmit signals with the receiving end;

[0021] The authentication unit is used to verify the legitimacy of the transmitter.

[0022] A data acquisition unit is used to acquire charging-related physical quantity data.

[0023] Furthermore, the resonant unit includes a switchable variable capacitor bank, and the variable capacitor bank of the resonant unit switches the capacitance value through a switching circuit to adapt to different charging modes.

[0024] Furthermore, the data interaction unit includes an FSK modulation module and an ASK demodulation module for bidirectional data communication with the receiving end.

[0025] Furthermore, the data acquisition unit includes a voltage acquisition circuit and a temperature acquisition circuit.

[0026] The advantages of this utility model based on the above solution are as follows:

[0027] 1. This utility model enhances the magnetic attraction to make the wireless charging receiver and transmitter more stable, reducing displacement during charging and improving charging efficiency and stability.

[0028] 2. The power input terminal of this utility model has multiple voltage access methods and protocol support, and the power conversion module and charging control module work together to improve the performance and compatibility of the wireless charging system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the power conversion module in this utility model;

[0032] Figure 3 This is a schematic diagram of the power input terminal in this utility model;

[0033] Figure 4 This is a schematic diagram of the voltage conversion control chip in this utility model;

[0034] Figure 5 This is a schematic diagram of the DC-DC conversion circuit in this utility model;

[0035] Figure 6 This is a schematic diagram of the power output terminal in this utility model;

[0036] Figure 7 This is a schematic diagram of the charging control module in this utility model;

[0037] Figure 8 This is a schematic diagram of the main controller and resonant unit in this utility model;

[0038] Figure 9 This is a schematic diagram of the data interaction unit in this utility model;

[0039] Figure 10 This is a schematic diagram of the authentication unit in this utility model;

[0040] Figure 11 This is a schematic diagram of the data acquisition unit in this utility model.

[0041] In the figure, the following labels are used: 1. Magnetic component; 101. Magnetic unit; 2. Power conversion module; 201. Power input terminal; 202. Power conversion unit; 2021. Voltage conversion control chip; 2022. DC-DC conversion circuit; 203. Power output terminal; 3. Charging control module; 301. Main controller; 302. Resonance unit; 303. Data interaction unit; 304. Authentication unit; 305. Data acquisition unit. Detailed Implementation

[0042] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0043] It should be noted that when a component is referred to as "fixed," "set," or "connected" to another component, it may be located directly or indirectly on that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first," "second," etc., are used for ease of description only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "Many" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0044] like Figure 1 As shown in one embodiment of the present invention, a strong magnetic wireless charging structure includes a magnetic suction component 1, the magnetic induction intensity of the working surface of the magnetic suction component 1 being 4000 Gauss to 5000 Gauss.

[0045] The magnetic attractor 1 is in the shape of a ring and includes multiple magnetic rings, which are composed of multiple magnetic units 101.

[0046] The thickness of the magnetic component 1 is 2.2mm to 2.8mm.

[0047] In this embodiment, a high-magnetic material (such as neodymium iron boron alloy) is selected to make the magnetic attracting unit 101. This material has high magnetic permeability and remanence, which can meet the requirements of strong magnetic force. These magnetic attracting units 101 are arranged into magnetic attracting rings according to design requirements, and multiple magnetic attracting rings are nested with each other to form a residual ring-shaped magnetic attracting component 1.

[0048] During the manufacturing process, the size and shape of each magnetic unit 101 are precisely controlled to ensure a tight fit after assembly and reduce magnetic resistance. By optimizing the arrangement and number of magnetic units 101, the magnetic field distribution of the magnetic component 1 is adjusted to achieve the designed magnetic induction intensity on its working surface. For example, after multiple experiments and simulations, it was determined that in this embodiment, each magnetic ring consists of 11 magnetic units 101, with a total of 2 magnetic rings, ultimately achieving a stable magnetic induction intensity of approximately 4300 Gauss on the working surface of the magnetic component 1.

[0049] For the thickness of magnetic component 1, a high-precision machining process is used to ensure that its thickness is controlled within 2.5mm. During the production process, thickness detection equipment is used to inspect each magnetic component 1 to ensure that the thickness deviation is controlled within a very small range, thereby ensuring product consistency and stability.

[0050] With a magnetic induction intensity of approximately 4500 gauss, compared to the magnetic attraction component 1 in traditional wireless charging structures, the attraction between the wireless charging transmitter and receiver is enhanced. In practical use, this effectively reduces the displacement and shaking of the receiver during charging, making charging more stable, reducing the risk of charging interruption due to poor contact, and improving charging efficiency.

[0051] The ring-shaped design better adapts to the shape of the wireless charging coil, reducing magnetic field interference and improving magnetic field utilization. The multi-turn magnetic ring is composed of multiple magnetic units 101. This structure allows for flexible adjustment of the magnetic field distribution, making the magnetic field more evenly distributed on the working surface and further enhancing the adsorption effect. At the same time, the multi-turn magnetic ring design also increases the contact area between the magnetic component 1 and the receiver, thereby improving the overall adsorption force.

[0052] The 2.5mm thickness ensures the strength of the magnetic component 1 while optimizing the penetration and concentration of the magnetic field. The thicker magnetic component 1 provides a stronger magnetic field and reduces magnetic field leakage to a certain extent, allowing more magnetic lines of force to act on the receiving end, enhancing the adsorption effect and also helping to improve the efficiency of wireless charging.

[0053] like Figures 2 to 11 As shown in the figure, a strong magnetic wireless charging system according to one embodiment of the present invention applies the above-mentioned strong magnetic wireless charging structure and includes a power conversion module 2 and a charging control module 3. The power conversion module 2 converts the input power voltage into a voltage suitable for wireless charging; the charging control module 3 controls the wireless charging process.

[0054] The power conversion module 2 includes a power input terminal 201, a power conversion unit 202, and a power output terminal 203. The power input terminal 201 includes a first interface for connecting a preset DC voltage and a second interface for upgrading software. The power conversion unit 202 includes a voltage conversion control chip 2021 and a DC conversion circuit 2022 connected between the power input terminal 201 and the power output terminal 203. The charging control module 3 controls the voltage conversion control chip 2021, and the voltage conversion control chip 2021 controls the DC conversion circuit 2022. The power output terminal 203 is used to supply power to the wireless charging bridge.

[0055] The first interface can be directly connected to the power supply or connected to the power supply through an adapter.

[0056] The charging control module 3 includes a main controller 301, a resonant unit 302, a data interaction unit 303, an authentication unit 304, and a data acquisition unit 305. The main controller 301 is used for the overall control of the charging process; some resonant elements of the resonant unit 302 can be switched on or off via switches to adapt to different charging modes; the data interaction unit 303 is used for signal transmission with the receiving end; the authentication unit 304 is used to verify the legitimacy of the transmitting end; and the data acquisition unit 305 is used to collect charging-related physical quantity data.

[0057] The resonant unit 302 includes a switchable variable capacitor bank. The variable capacitor bank of the resonant unit 302 switches the capacitance value through a switching circuit to adapt to different charging modes.

[0058] The data interaction unit 303 includes an FSK modulation module and an ASK demodulation module for bidirectional data communication with the receiving end.

[0059] The data acquisition unit 305 includes a voltage acquisition circuit and a temperature acquisition circuit.

[0060] In the actual circuit design, the first interface of the power input terminal 201 is designed as a solder pad for easy direct connection to a 5-20V DC power supply. Simultaneously, to achieve compatibility with various charging protocols, corresponding protocol identification circuits (such as DP and DM pin circuits for the QC protocol, and CC pin circuits for the PD protocol) are connected to the first interface, enabling compatibility with different types of adapters. Furthermore, DP and DM also serve as software upgrade interfaces for the MT5805. The second interface uses standard SWCLK and SWDIO interfaces, facilitating future system software upgrades.

[0061] The power conversion unit 202 uses the SW3203 as the voltage conversion control chip 2021, and is externally paired with four MOSFETs to form an H-bridge structure, together with inductors, capacitors, and other components to form the DC-DC conversion circuit 2022. During circuit connection, it is ensured that the parameters of each component are matched; for example, an inductor with an appropriate inductance value (such as a 10μH inductor) and a capacitor with an appropriate capacitance value (such as a 22μF output capacitor) are selected to ensure the stability and efficiency of voltage conversion. The charging control module 3 communicates with the SW3203 chip via the I²C bus, sending control commands according to charging requirements to adjust the output voltage.

[0062] The main controller 301 of the charging control module 3 uses the MT5805 chip from Meixinsheng, communicating with other modules via the I²C bus to coordinate and control the entire charging process. The variable capacitor bank of the resonant unit 302 consists of multiple capacitors, such as four 100nF capacitors, controlled by a MOSFET (such as Q3A) as a switch. In different charging modes, the MT5805 chip controls the on and off of the MOSFET according to a preset program, realizing the connection or disconnection of the variable capacitor bank, thereby adjusting the resonant frequency to adapt to different charging requirements.

[0063] The FSK modulation module and ASK demodulation module in data interaction unit 303 are respectively responsible for modulating the data from the transmitter according to the WPC standard protocol (such as BPP or MPP) and sending it to the receiver, and for receiving and demodulating the information sent by the receiver. The authentication unit 304 uses the FM1210 encryption chip, which stores a key used to verify the legitimacy of the transmitter. During charging, when the receiver requests authentication, the MT5805 chip reads the key data from the FM1210 chip via the I²C bus and sends it to the receiver for verification.

[0064] The voltage acquisition circuit in the data acquisition unit 305 samples the voltage of the wireless charging coil (e.g., by voltage division sampling using resistor R41), conditions the sampled voltage signal through an operational amplifier circuit, and then inputs it to the ADC interface of the MCU (e.g., PT32Y003) for conversion and processing to obtain the coil voltage data. The temperature acquisition circuit uses a thermistor (e.g., an NTC thermistor), placed near a heat-generating element (e.g., next to the wireless charging coil or power chip). Temperature data is obtained by measuring the resistance change of the thermistor and is also input to the MCU for processing.

[0065] In this embodiment, the first interface can be directly connected to a power source or connected via an adapter, greatly improving the system's versatility. Users can choose different power supply methods according to their actual needs. Whether using a standard adapter or other power sources within the appropriate voltage range, the wireless charging system can be powered normally, facilitating use in various scenarios.

[0066] The power conversion module 2 can stably convert the input power supply voltage into a voltage suitable for wireless charging. Through the coordinated operation of the voltage conversion control chip 2021 and the DC-DC conversion circuit 2022, efficient voltage conversion is achieved, which not only reduces energy waste but also reduces system heat generation and improves system stability and reliability.

[0067] The switchable resonant element and variable capacitor bank of the resonant unit 302 enable the system to flexibly switch charging modes according to different charging scenarios and device requirements. For example, when charging devices that support the MPP protocol, the variable capacitor bank is switched to increase the operating frequency and achieve higher power charging; while when charging devices that only support the BPP protocol, the appropriate capacitance value and operating frequency are adjusted to ensure charging compatibility and stability. This flexible switching of charging modes improves the system's adaptability to different devices and expands the application range of the wireless charging system.

[0068] The FSK modulation module and ASK demodulation module in the data interaction unit 303 enable stable bidirectional data communication between the transmitter and receiver. Through encrypted communication, the transmitter can promptly obtain the charging needs and status information of the receiver. For example, if the receiver needs to increase or decrease the power, the transmitter can adjust the operating frequency or control the output voltage of the power conversion module 2 via PWM based on this information, thereby achieving precise control of the charging power and improving the safety and efficiency of charging.

[0069] The voltage and temperature acquisition circuits in the data acquisition unit 305 can collect key physical quantity data in real time during the charging process. By monitoring the coil voltage, the presence of foreign objects (FOD) can be determined. When abnormal voltage fluctuations are detected, the system can take timely measures, such as reducing the transmission power or stopping charging, to avoid safety issues caused by the presence of foreign objects. The temperature acquisition circuit monitors the system temperature in real time. When the temperature is too high, the main controller 301 adjusts the charging power to prevent the system from overheating and protect the safety and lifespan of the device. This comprehensive charging status monitoring function improves the safety and reliability of the wireless charging system.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A strong magnetic wireless charging system, characterized in that, Includes a magnetic suction component, wherein the magnetic induction intensity of the working surface of the magnetic suction component is 4000 Gauss to 5000 Gauss; A power conversion module that converts the input power voltage into a voltage suitable for wireless charging; A charging control module that controls the wireless charging process.

2. The strong magnetic wireless charging system according to claim 1, characterized in that, The magnetic attractor is ring-shaped and includes multiple magnetic rings, each of which is composed of multiple magnetic units.

3. The strong magnetic wireless charging system according to claim 2, characterized in that, The thickness of the magnetic accumulator is 2.2mm to 2.8mm.

4. The strong magnetic wireless charging system according to claim 1, characterized in that, The power conversion module includes: The power input terminal includes a first interface for connecting a preset DC voltage and a second interface for upgrading software. A power conversion unit, comprising a voltage conversion control chip and a DC-DC conversion circuit connected between the power input terminal and the power output terminal, wherein the charging control module controls the voltage conversion control chip and the voltage conversion control chip controls the DC-DC conversion circuit; The power output terminal is used to supply power to the wireless charging bridge.

5. A strong magnetic wireless charging system according to claim 4, characterized in that, The first interface can be directly connected to a power source or connected to a power source via an adapter.

6. The strong magnetic wireless charging system according to claim 1, characterized in that, The charging control module includes: The main controller is used for the overall control of the charging process; The resonant unit, wherein some resonant elements of the resonant unit can be switched on or off by a switch to adapt to different charging modes; A data interaction unit, which is used to transmit signals with the receiving end; The authentication unit is used to verify the legitimacy of the transmitter. A data acquisition unit is used to acquire charging-related physical quantity data.

7. A strong magnetic wireless charging system according to claim 6, characterized in that, The resonant unit includes a switchable variable capacitor bank. The variable capacitor bank of the resonant unit switches the capacitance value through a switching circuit to adapt to different charging modes.

8. A strong magnetic wireless charging system according to claim 6, characterized in that, The data interaction unit includes an FSK modulation module and an ASK demodulation module, used for bidirectional data communication with the receiving end.

9. A strong magnetic wireless charging system according to claim 6, characterized in that, The data acquisition unit includes a voltage acquisition circuit and a temperature acquisition circuit.

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