Wireless charging module, wireless charging device and electronic equipment

Abstract

The utility model provides a wireless charging module, a wireless charging device and electronic equipment. Comprising an induction circuit which is provided with an induction element, and the induction element generates an induction electric signal when inducting that to-be-charged equipment is placed in a charging area of the wireless charging module; a power supply circuit; the power supply control circuit is provided with a switching device and is electrically connected with the power supply circuit; the wireless charging circuit is provided with a charging coil and is electrically connected with the power supply control circuit; the central processing circuit is electrically connected with the power supply circuit, the power supply control circuit and the induction circuit and is configured to control a switching device in the power supply control circuit to be switched on after receiving the induction electric signal, so that the electric signal provided by the power supply circuit is transmitted to a charging coil of the wireless charging circuit through the power supply control circuit; and charging the to-be-charged equipment. The problem that in the prior art, implementation of the wireless charging function of a device with a wireless charging module is large in power consumption or needs manual operation is solved.

Description

Technical Field

[0001] The present application relates to the technical field of wireless charging, and more particularly, to a wireless charging module, a wireless charging device, and an electronic device. Background Art

[0002] Currently, there are generally two ways to implement the wireless charging function of a device with a wireless charging module:

[0003] First: The input power supply continuously powers the wireless charging module, resulting in the wireless charging module being in a working state even when there is no device to be charged, causing relatively high power consumption and affecting the product's life and safety.

[0004] Second: The function of wireless charging needs to be manually operated by pressing a button, with relatively low intelligence. Summary of the Utility Model

[0005] The main purpose of the present application is to provide a wireless charging module, a wireless charging device, and an electronic device to solve the problems of high power consumption or the need for manual operation in implementing the wireless charging function of a device with a wireless charging module in the prior art.

[0006] To achieve the above object, according to one aspect of the present application, a wireless charging module is provided, including: an induction circuit having an induction element that generates an induction electrical signal when it senses that a device to be charged is placed in the charging area of the wireless charging module; a power supply circuit; a power control circuit having a switching device and electrically connected to the power supply circuit; a wireless charging circuit having a charging coil and electrically connected to the power control circuit; and a central processing circuit electrically connected to the power supply circuit, the power control circuit, and the induction circuit respectively, and configured to control the switching device in the power control circuit to conduct after receiving the induction electrical signal, so that the electrical signal provided by the power supply circuit is transmitted to the charging coil of the wireless charging circuit through the power control circuit to charge the device to be charged.

[0007] Further, the induction element is an induction metal sheet that generates an induction voltage signal when it senses that the device to be charged is placed in the charging area of the wireless charging module.

[0008] Further, the induction circuit further includes an induction main chip, a resistor module, and an inductor module. The induction metal sheet is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the resistor module, and the second end of the resistor module is connected to a preset pin of the induction main chip.

[0009] Further, the power control circuit includes a first switching device and a second switching device. A first end of the first switching device is connected to a first voltage signal, where the first voltage signal is the voltage signal output by the power supply circuit. A second end of the first switching device is electrically connected to a third end of the second switching device. A third end of the first switching device outputs a power supply signal for powering the wireless charging circuit. A second end of the second switching device is connected to an enable signal, where the enable signal is output by the central processing circuit after receiving the induced electrical signal. The enable signal controls the second switching device to conduct, and a first end of the second switching device is grounded.

[0010] Further, the power supply circuit further includes a buck module, where the buck module is configured to reduce the amplitude of the first voltage signal to obtain a second voltage signal. The first voltage signal is the voltage signal output by the power supply circuit, and the second voltage signal is used to power the induction circuit and the central processing circuit.

[0011] Further, the wireless charging circuit further has a first pad and a second pad. A first terminal of the charging coil is soldered on the first pad, and a second terminal of the charging coil is soldered on the second pad.

[0012] According to another aspect of the present application, there is provided a wireless charging device, including: any one of the wireless charging modules; a housing having a receiving cavity, and the wireless charging module is disposed in the receiving cavity.

[0013] Further, the sensing element in the wireless charging module is attached to the inner surface of the housing near the charging area.

[0014] According to still another aspect of the present application, there is provided an electronic device integrated with the wireless charging device.

[0015] Further, the electronic device is a vehicle-mounted electronic device or a mobile power supply.

[0016] Applying the technical solution of the present application, the wireless charging module includes: an induction circuit having an induction element that generates an induction electrical signal when it senses that a device to be charged is placed in the charging area of the wireless charging module; a power supply circuit; a power control circuit having a switching device and electrically connected to the power supply circuit; a wireless charging circuit having a charging coil and electrically connected to the power control circuit; and a central processing circuit electrically connected to the power supply circuit, the power control circuit, and the induction circuit respectively, and configured to control the switching device in the power control circuit to conduct after receiving the induction electrical signal, so that the electrical signal provided by the power supply circuit is transmitted to the charging coil of the wireless charging circuit through the power control circuit to charge the device to be charged. This solves the problems in the prior art that the power consumption for realizing the wireless charging function of a device with a wireless charging module is relatively large or manual operation is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the application. The illustrative embodiments and descriptions thereof of the application are used to explain the application and do not constitute an improper limitation to the application. In the drawings:

[0018] Figure 1 Shows a schematic diagram of a wireless charging module provided according to an embodiment of the present application;

[0019] Figure 2 Shows a circuit diagram of the central processing circuit provided according to an embodiment of the present application;

[0020] Figure 3 Shows a circuit diagram of the induction circuit provided according to an embodiment of the present application;

[0021] Figure 4 Shows a circuit diagram of the power control circuit provided according to an embodiment of the present application;

[0022] Figure 5 Shows a circuit diagram of the power supply circuit provided according to an embodiment of the present application;

[0023] Figure 6 Shows a circuit diagram of another power supply circuit provided according to an embodiment of the present application;

[0024] Figure 7a Shows a first part of the circuit diagram of the wireless charging circuit provided according to an embodiment of the present application;

[0025] Figure 7b Shows a second part of the circuit diagram of the wireless charging circuit provided according to an embodiment of the present application;

[0026] Figure 7c Shows a third part of the circuit diagram of the wireless charging circuit provided according to an embodiment of the present application.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 10. Induction circuit; 20. Power supply circuit; 30. Power control circuit; 40. Wireless charging circuit; 50. Central processing circuit. Detailed implementation manners

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0030] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element can be directly on the other element, or there can also be an intermediate element. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element can be "directly connected" to the other element, or "connected" to the other element through a third element.

[0032] As introduced in the background art, the implementation of the wireless charging function of devices with a wireless charging module in the prior art has a relatively high power consumption or requires manual operation. To solve the problems of relatively high power consumption or the need for manual operation in the implementation of the wireless charging function of devices with a wireless charging module in the prior art, the present application proposes a wireless charging module, a wireless charging device, and an electronic device.

[0033] The present utility model proposes a wireless charging module. As Figure 1 shown, it includes: an induction circuit 10 having an induction element that generates an induction electrical signal when it senses that a device to be charged is placed in the charging area of the wireless charging module; a power supply circuit 20; a power control circuit 30 having a switching device and electrically connected to the power supply circuit 20; a wireless charging circuit 40 having a charging coil and electrically connected to the power control circuit 30; and a central processing circuit 50 electrically connected to the power supply circuit 20, the power control circuit 30, and the induction circuit 10 respectively, and configured to control the switching device in the power control circuit 30 to conduct after receiving the induction electrical signal, so that the electrical signal provided by the power supply circuit 20 is transmitted to the charging coil of the wireless charging circuit 40 through the power control circuit 30 to charge the device to be charged.

[0034] Specifically, as Figure 1 and Figure 2 shown, U3 of the central processing circuit 50 is an MCU chip, which can be an MCU: HR7P169B chip, and is used to receive the electrical signal of the induction circuit 10. Among them, the induction circuit 10 and the central processing circuit 50 are communicatively connected through the I 2 C protocol. The VSS pin is connected to the power supply circuit 20 to supply power to the MCU chip of the central processing circuit 50, and the PA7 pin of the central processing circuit 50 is connected to the power control circuit 30.

[0035] In an alternative solution, the induction element is an induction metal sheet, and the induction metal sheet generates an induction voltage signal when it senses that a device to be charged is placed in the charging area of the wireless charging module.

[0036] Specifically, the induction metal sheet is a touch induction metal sheet, and its implementation principle usually uses capacitive induction technology. Capacitive induction is a technology that uses capacitance changes to detect the approach or touch of an object. Its principle is to use the capacitance change between the metal sheet and the capacitive induction circuit 10 to detect the touch action. When a finger or other object approaches the metal sheet, it will change the capacitance between the metal sheet and the capacitive induction circuit 10. The capacitive induction circuit 10 will detect this capacitance change and convert the touch action into a digital signal through the signal processor in the circuit. In this way, the detection and response to the touch of the metal sheet can be realized. Capacitive induction technology has the advantages of high sensitivity, fast response, and low power consumption, so it is widely used in the implementation of touch induction metal sheets. The application scenarios that can be realized by this technology include smart phones, tablet computers, touch screen displays, etc.

[0037] In an alternative solution, as Figure 1 and Figure 3 shown, the induction circuit 10 further includes an induction main chip, a resistor module, and an inductor module. The induction metal sheet is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the resistor module, and the second end of the resistor module is connected to a preset pin of the induction main chip.

[0038] Specifically, as Figure 2 shown, the induction main chip is U4, the model of the induction main chip is: A96T516, the induction main chip has 8 pins, which are SCL, SDA, VDD, VSS, CS2, DSDA / CS0, DSCL / CS1, INT0, and the induction metal sheet is Figure 2 Proximity_PAD in Figure 2 L3 in Figure 2R41 in it, the proximity metal sheet Proximity_PAD is connected to the resistor module L3, the resistor module L3 is connected to the inductor module R41, and the inductor module R41 is connected to the DSDA / CS0 pin of the induction main chip U4.

[0039] In an alternative solution, as Figure 1 and Figure 4 shown, the power control circuit includes a first switching device and a second switching device. The first end of the first switching device is connected to a first voltage signal, and the first voltage signal is the voltage signal output by the power supply circuit. The second end of the first switching device is electrically connected to the third end of the second switching device. The third end of the first switching device outputs a power supply signal for powering the wireless charging circuit. The second end of the second switching device is connected to an enable signal, and the enable signal is output by the central processing circuit 50 after receiving the induction electrical signal. The enable signal controls the second switching device to conduct, and the first end of the second switching device is grounded.

[0040] Specifically, as Figure 3 shown, the first switching device is PMOS Q1, and the second switching device is NMOS Q2. The gate of the first switching device is connected to the first voltage signal V_OUT, which outputs the voltage signal for the power supply circuit. The source of the first switching device is connected to the drain of the second switching device. The drain of the first switching device is connected to the power supply signal DC_IN for powering the wireless charging circuit. The source of the second switching device is connected to the enable signal, and the gate of the second switching device is grounded; when the second switching device receives the enable signal, the second switching device conducts. Since the drain of the second switching device is connected to the source of the first switching device, when the second switching device conducts, the first switching device also conducts, enabling the voltage output by the power supply circuit to charge the wireless charging circuit.

[0041] In an alternative solution, the power supply circuit further includes a buck module, and the buck module is used to reduce the amplitude of the first voltage signal to obtain a second voltage signal. The first voltage signal is the voltage signal output by the power supply circuit, and the second voltage signal is used to power the induction circuit and the central processing circuit.

[0042] Specifically, as Figure 5 shown, U6 is the buck module of the power supply circuit, and the model of the buck module can be SY8493, which reduces the battery voltage to the second voltage signal to power the wireless charging module; U2 is the power supply buck chip for the MCU, and the model of the U2 buck chip is CJ6386. The buck chip has 3 pins. The pin IN is the voltage input terminal, the pin OUT is the voltage output terminal, and the pin GND is grounded. The battery voltage passes through the buck module and outputs a 3.3V voltage, and the 3.3V voltage is used to power the induction circuit and the central processing circuit.

[0043] Optionally, the power supply circuit for wireless charging can also be selected asFigure 6 The power supply circuit shown

[0044] In an alternative solution, the wireless charging circuit further has a first pad and a second pad, and the first terminal of the charging coil is welded to the first pad, and the second terminal of the charging coil is welded to the second pad.

[0045] Specifically Figure 7a 、 Figure 7b and Figure 7c are the circuit diagrams of the wireless charging circuit. As shown in Figure 7a , T3 is the charging coil, T1 is the first pad, T2 is the second pad, and the charging coil is welded between the first pad and the second pad. Figure 7a The main chip U5 of the wireless charging circuit of can be selected as: MI9000; Figure 7b The wireless charging control chip U1 of can be selected as: MI9500.

[0046] The present utility model further includes a wireless charging device, including: any one of the wireless charging modules; a housing having a receiving cavity, and the wireless charging module is placed in the receiving cavity.

[0047] Specifically, the induction circuit, the power supply circuit, the power control circuit, the wireless charging circuit and the central processing circuit are all located in the receiving cavity of the wireless charging device.

[0048] In an alternative solution, the induction element in the wireless charging module is attached to the inner surface of the housing near the charging area.

[0049] Specifically, the induction element in the wireless charging module is attached to the inner surface of the housing near the charging area for sensing devices with wireless charging, such as mobile phones, earphones, tablet computers and other devices supporting wireless charging.

[0050] The present utility model further includes an electronic device integrated with the wireless charging device.

[0051] In an alternative solution, the electronic device is a vehicle-mounted electronic device or a mobile power supply.

[0052] Specifically, the electronic device integrated with the wireless charging device can be used to be installed in a car or inside a power bank.

[0053] An induction main chip is installed in the induction circuit beside the wireless charging circuit of this embodiment. When the device is placed, the induction circuit automatically detects the access of the device, generates a series of electrical signals and transmits them to the central processing circuit for electrical signal information detection. When it recognizes that it is a wireless device, it outputs a control signal to the power control circuit. The power control circuit is turned on, and the DC power supply provides power to the wireless charging circuit. The wireless transmitting coil in the wireless charging circuit starts to work to charge the device; it solves the problem that the existing infrared induction charging device consumes more energy, and solves the problem that the device with a wireless charging button to turn on the charging function requires manual operation of the button. This application replaces the device with wireless charging and infrared induction, and has the characteristics of accurate automatic detection and high safety. It replaces the device with a wireless charging button switch and has the characteristics of high automatic induction intelligence. In the application of mobile power or energy storage products with wireless charging, the whole machine requires low power consumption, and the power consumption of the wireless charging module accounts for a relatively large proportion of the whole machine power consumption. To reduce the power consumption of each module, an automatic induction touch sensing device is added, which can automatically detect the access of the wireless charging device and automatically turn on the wireless charging function. If the mobile phone is removed, the power supply of the wireless charging circuit is automatically turned off to achieve the purpose of reducing power consumption; and in a humid application environment, the wireless automatic induction charging function is safe and reliable.

[0054] The device induction device itself can adjust the detection sensitivity, and by adjusting the chip parameters, the purpose of detecting the sensitivity of the accessed device is achieved.

[0055] From the above description, it can be seen that the above embodiments of this application achieve the following technical effects:

[0056] A wireless charging module of this application includes: an induction circuit having an induction element that generates an induction electrical signal when it senses that a device to be charged is placed in the charging area of the wireless charging module; a power supply circuit; a power control circuit having a switching device and electrically connected to the power supply circuit; a wireless charging circuit having a charging coil and electrically connected to the power control circuit; a central processing circuit electrically connected to the power supply circuit, the power control circuit, and the induction circuit respectively, and configured to control the switching device in the power control circuit to conduct after receiving the induction electrical signal, so that the electrical signal provided by the power supply circuit is transmitted to the charging coil of the wireless charging circuit through the power control circuit to charge the device to be charged. This application solves the problems of large power consumption in realizing the wireless charging function of devices with wireless charging modules in the prior art or the need for manual operation.

[0057] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A wireless charging module, characterized in that: include: The induction circuit has an induction element, and the induction element generates an induction electric signal when sensing that a device to be charged is placed in a charging area of ​​the wireless charging module; Power supply circuit; A power supply control circuit having a switch device and electrically connected to the power supply circuit; A wireless charging circuit having a charging coil and electrically connected to the power control circuit; The central processing circuit is electrically connected to the power supply circuit, the power control circuit and the induction circuit respectively, and is configured to control the switching device in the power control circuit to be turned on after receiving the induced electrical signal, so that the electrical signal provided by the power supply circuit is transmitted to the charging coil of the wireless charging circuit through the power control circuit to charge the device to be charged.

2. The wireless charging module according to claim 1, characterized in that: The sensing element is an induction metal sheet, and the induction metal sheet generates an induction voltage signal when sensing that the device to be charged is placed in the charging area of ​​the wireless charging module.

3. The wireless charging module according to claim 2, characterized in that: The sensing circuit also includes a sensing main chip, a resistance module and an inductance module, the sensing metal sheet is connected to a first end of the inductance module, the second end of the inductance module is connected to a first end of the resistance module, and the second end of the resistance module is connected to a preset pin of the sensing main chip.

4. The wireless charging module according to claim 1, characterized in that: The power control circuit includes a first switch device and a second switch device. The first end of the first switch device is connected to a first voltage signal, which is a voltage signal output by the power supply circuit. The second end of the first switch device is electrically connected to a third end of the second switch device, which outputs a power supply signal for powering the wireless charging circuit. The second end of the second switch device is connected to an enable signal, which is output by the central processing circuit after receiving the induced electrical signal. The enable signal controls the second switch device to turn on. The first end of the second switch device is grounded.

5. The wireless charging module according to claim 1, characterized in that: The power supply circuit also includes a step-down module, which is used to reduce the amplitude of the first voltage signal to obtain a second voltage signal. The first voltage signal is the voltage signal output by the power supply circuit, and the second voltage signal is used to power the sensing circuit and the central processing circuit.

6. The wireless charging module according to claim 1, characterized in that: The wireless charging circuit further comprises a first soldering pad and a second soldering pad, the first terminal of the charging coil is soldered on the first soldering pad, and the second terminal of the charging coil is soldered on the second soldering pad.

7. A wireless charging device, characterized in that: include: The wireless charging module according to any one of claims 1 to 6; The shell has a receiving cavity, and the wireless charging module is placed in the receiving cavity.

8. The wireless charging device according to claim 7, characterized in that: The induction element in the wireless charging module is attached to the inner surface of the shell near the charging area.

9. An electronic device, characterized in that: The wireless charging device according to claim 7 or 8 is integrated.

10. The electronic device according to claim 9, characterized in that: The electronic device is a vehicle-mounted electronic device or a mobile power source.

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