CN113659736A

CN113659736A - Wireless charger and electronic equipment

Info

Publication number: CN113659736A
Application number: CN202111218702.3A
Authority: CN
Inventors: 姚寿祥
Original assignee: Shenzhen Injoinic Technology Co Ltd
Current assignee: Shenzhen Injoinic Technology Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2021-11-16

Abstract

The embodiment of the application discloses wireless charger and electronic equipment belongs to electronic equipment technical field, includes: the charging device comprises a main control module, a first charging module and a second charging module, wherein the first charging module comprises a first coil and a first resonant capacitor, the second charging module comprises a second coil and a second resonant capacitor, and the second coil is embedded in the first coil; the main control module outputs an enabling signal, and the first charging module and the second charging module are sequentially subjected to polling enabling, so that the wireless charging receiving equipment compatible with different coil sizes can be realized. The size of the charger is reduced by nesting the two coils with different sizes, the cost is reduced, and various electronic devices can be charged in a shared mode.

Description

Wireless charger and electronic equipment

Technical Field

The application relates to the technical field of electronic circuits, in particular to a wireless charger and electronic equipment.

Background

With the development of wireless charging technology, products carrying wireless charging functions are increasing gradually, and common consumer electronics such as smart phones, smart watches, TWS bluetooth headsets, electric toothbrushes and the like have been widely carried with wireless charging functions. The wireless charger is a device which is charged by utilizing the electromagnetic induction principle, a coil is respectively arranged at a transmitting end and a receiving end, the coil at the transmitting end sends out electromagnetic signals to the outside, and the coil at the receiving end receives the electromagnetic signals and converts the electromagnetic signals into current, so that the purpose of wireless charging is achieved.

Various wireless charging receiving devices, such as smart phones, smart watches and the like, have greatly different sizes of wireless charging receiving coils, and wireless charging cannot be matched between transmitting coils and receiving coils with different sizes and grades, so that wireless chargers of different wireless charging receiving devices cannot be used mutually, that is, a charger for wireless charging of a mobile phone cannot charge a watch, and a wireless charger for charging a watch cannot charge other products.

In order to solve the problems, the wireless chargers of different types of equipment such as a smart phone, a smart watch and a TWS Bluetooth headset are compatible, the existing wireless charger is a wireless charger with multiple functions, namely three wireless chargers are combined into a set of mold, and each wireless charger works independently. However, in the above-mentioned technology, a plurality of wireless chargers are combined into one set of mould, and the scheme cost is very high, and is bulky, inconvenient carrying to a plurality of wireless charging modules have mutual interference problem at the during operation simultaneously, increase complicated circuit and will eliminate mutual direct interference.

Disclosure of Invention

The embodiment of the application provides a wireless charger and electronic equipment, has reduced the volume through designing the coil to two kinds of not unidimensional, and the cost is reduced can also charge in multiple electronic equipment sharing.

A first aspect of embodiments of the present application provides a wireless charger, including: the charging system comprises a main control module, a first charging module and a second charging module; the first charging module comprises a first coil, a first resonant capacitor and a first path switch, the second charging module comprises a second coil, a second resonant capacitor and a second path switch, and the second coil is embedded in the first coil;

the main control module is used for outputting a first enabling signal to the first charging module or outputting a second enabling signal to the second charging module;

the first charging module is configured to receive the first enable signal and turn on a charging circuit of the first charging module to charge the electronic device coupled and matched with the first coil;

and the second charging module is used for receiving the second enabling signal and conducting a charging circuit of the second charging module so as to charge the electronic equipment coupled and matched with the second coil.

A second aspect of the present application provides an electronic device including the electronic device disclosed in the first aspect of the embodiments of the present application.

In the embodiment of the present application, the wireless charger may include a first charging module including a main control module, a first charging module, and a second charging module; the first charging module can comprise a first coil and a first resonant capacitor, the second charging module comprises a second coil and a second resonant capacitor, and the second coil is embedded in the first coil; the main control module is used for outputting a first enabling signal to the first charging module or outputting a second enabling signal to the second charging module; the first charging module is used for conducting a charging circuit of the first charging module under the control of the first enabling signal so as to charge the electronic equipment coupled and matched with the first coil; and the second charging module is used for conducting a charging circuit of the second charging module under the control of a second enabling signal so as to charge the electronic equipment coupled and matched with the second coil. The main control module outputs an enabling signal, and the first charging module and the second charging module are sequentially subjected to polling enabling, so that the wireless charging receiving equipment compatible with different coil sizes can be realized. The size of the charger is reduced by nesting the two coils with different sizes, the cost is reduced, and various electronic devices can be charged in a shared mode.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings referred to in the embodiments or the background art of the present application will be briefly described below.

Fig. 1 is a schematic structural diagram of a wireless charger according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a first coil provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second coil provided in the embodiment of the present application;

fig. 4 is a schematic circuit structure diagram of a wireless charger according to an embodiment of the present disclosure;

fig. 5 is a schematic circuit structure diagram of a wireless charger according to an embodiment of the present disclosure;

fig. 6 is a schematic circuit structure diagram of a main control module according to an embodiment of the present disclosure;

FIG. 7 is a timing diagram illustrating an exemplary polling of enable signals according to an embodiment of the present disclosure;

fig. 8 is a timing diagram illustrating polling of an enable signal according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may include other steps or elements not listed or inherent to such process, system, article, or apparatus in one possible example.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The electronic device according to embodiments of the present application may be a portable electronic device, such as a mobile phone, a tablet computer, a wearable electronic device with wireless communication function (e.g., a smart watch, a bluetooth headset), an electric toothbrush, an electric shaver, and the like, which includes other functions, such as a personal digital assistant and/or a music player. Exemplary embodiments of the portable electronic device include, but are not limited to, portable electronic devices that carry an IOS system, an Android system, a Microsoft system, or other operating system. The portable electronic device may also be other portable electronic devices such as a Laptop computer (Laptop) or the like.

Referring to fig. 1, an embodiment of the present application provides a structural schematic diagram of a wireless charger, where the wireless charger may include: the charging system comprises a main control module 1, a first charging module 2 and a second charging module 3; the first charging module 2 comprises a first coil, a first resonant capacitor and a first path switch, the second charging module 3 comprises a second resonant capacitor and a second path switch, and the second coil is embedded in the first coil;

the main control module 1 is configured to output a first enable signal to the first charging module 2 or send a second enable signal to the second charging module 3;

the first charging module 2 is configured to receive the first enable signal, and turn on a charging circuit of the first charging module 2 to charge the electronic device coupled and matched with the first coil;

the second charging module 3 is configured to receive the second enable signal, and turn on a charging circuit of the second charging module 3, so as to charge the electronic device coupled and matched with the second coil.

In the embodiment of the application, the second coil is embedded in the first coil to form the whole coil, the wireless charging of the electronic equipment is realized by the control logic of the main control module 1, the wireless charger can support the wireless charging between different electronic equipment, the size is greatly reduced by designing the coils with two different sizes, and the cost is reduced.

Please refer to fig. 2 to 3, which are schematic structural diagrams of the first coil and the second coil, respectively; the first coil and the second coil are in a planar spiral shape, and the second coil is arranged in the center of the first coil. In a possible embodiment, the first coil and the second coil are different in size, the first coil is larger in size and can be used for charging high-power electronic equipment such as a mobile phone and a tablet computer, and the second coil is smaller in size and can be used for charging low-power electronic equipment such as a bluetooth headset, a smart watch and an electric toothbrush.

And the electronic equipment coupled and matched with the first coil consumes more charging power than the electronic equipment coupled and matched with the second coil.

The charging protocol of the electronic device charged by the first charging module or the second charging module may be a standard charging protocol, that is, a national or international uniformly-specified charging protocol standard.

The electronic equipment can be referred to as wireless charging receiving equipment, and can be wirelessly charged through a wireless charger.

In one possible embodiment, the wireless charger further comprises: a first magnetic conductive sheet and a magnet; the first magnetic conductive sheet is used for placing a first coil, and the center of the first magnetic conductive sheet is provided with an opening for placing a magnet to magnetically attract electronic equipment coupled and matched with the first coil or electronic equipment coupled and matched with the second coil in the wireless charging process.

In one possible embodiment, the wireless charger further comprises: a second magnetic conductive sheet; the second magnetic conductive sheet is arranged on the first magnetic conductive sheet, is positioned in the center of the first coil and is used for placing a second coil; therefore, the size of the charger is reduced through the nested design of the two coils with different sizes, the cost is reduced, and multiple electronic devices can be charged in a shared mode.

One embodiment of the present application presents the dimensional parameters and electrical parameters of the first coil L1 and the second coil L2, as shown in fig. 2-4 and tables 1 and 2. Specifically, the large coil in fig. 4 may be referred to as the first coil L1 in the embodiment of the present application, and the small coil may be referred to as the second coil L2 described in the embodiment of the present application. As can be seen from fig. 4, the second coil L2 is embedded in the first coil L1; in addition, the dimensional parameters shown in fig. 2 to 4 and tables 1 and 2 are only examples, and other similar coil combination structures and similar parameters are not limited herein.

TABLE 1 dimensional parameters of the first coil and the second coil

Size numbering	Description of the invention	Unit: mm
			A1	First coil L1 outside diameter	46.0±1.5
B1	First coil L1 inner diameter of winding	25.5±0.5
			C1	Diameter of first coil L1 magnetic conductive sheet	50.0±1.0
A2	Second coil L2 outside diameter of winding	20.5±1.5
			B2	Second coil L2 inner diameter of winding	14.9±0.5
C2	Diameter of magnetic conductive sheet of second coil L2	24.5±1.0
			D2	Thickness of magnetic conductive sheet of second coil L2	2.8
H2	Diameter of central hole of second coil L2 magnetic conductive sheet	8.0
			D	Thickness of coil as a whole	4.0 MAX

TABLE 2 Electrical parameters of the first coil and the second coil

Electrical parameter
		First coil L1 inductance	6.7uH
Second coilL2 inductance	6.7uH
		First coil L1DCR impedance	Less than 100m omega
Second coil L2DCR impedance	Less than 150m omega
		First coil L1 winding	Wrapping the wire with 105P filaments at 0.08mm, and winding for 9 turns
First coil L1 winding	0.08mm 24P hot air wire, and winding 12 turns

In one possible example, the wireless charger further comprises a third magnetically permeable sheet; the third magnetic conductive sheet is used for placing the first coil and the second coil. That is, the first coil and the second coil may also be placed in the same third magnetic conductive sheet at the same time, and the specific placement manner is not limited herein; when the first coil and the second coil are placed in the same third magnetic conductive sheet at the same time, the center of the third magnetic conductive sheet is provided with an opening which can be used for preventing the magnet from attracting the electronic equipment coupled and matched with the first coil or the electronic equipment coupled and matched with the second coil in the wireless charging process.

It can be seen that the wireless charger provided in the embodiment of the present application may include a first charging module including a main control module, a first charging module, and a second charging module; the first charging module can comprise a first coil and a first resonant capacitor, the second charging module comprises a second coil and a second resonant capacitor, and the second coil is embedded in the first coil; the main control module is used for outputting a first enabling signal to the first charging module or outputting a second enabling signal to the second charging module; the first charging module is used for conducting a charging circuit of the first charging module under the control of the first enabling signal so as to charge the electronic equipment coupled and matched with the first coil; and the second charging module is used for conducting a charging circuit of the second charging module under the control of a second enabling signal so as to charge the electronic equipment coupled and matched with the second coil. The main control module outputs an enabling signal (a first enabling signal or a second enabling signal), and the first charging module and the second charging module are sequentially subjected to polling enabling, so that the wireless charging receiving equipment compatible with different coil sizes can be realized. The size of the charger is reduced by nesting the two coils with different sizes, the cost is reduced, and various electronic devices can be charged in a shared mode.

Fig. 5 is a schematic circuit structure diagram of a wireless charger according to an embodiment of the present disclosure, in which a first charging module 2 and a second charging module 3 are connected in parallel.

In one possible example, as shown in fig. 5, the first charging module 2 comprises: the first coil L1, the resistor R1, the first resonant capacitor C3, the MOS tube switch Q3.1 and the MOS tube switch Q3.2; the MOS tube switch Q3.1 and the MOS tube switch Q3.2 form the first path switch; one end of the first coil L1 is connected to one end of the first resonant capacitor C3, and the other end of the first coil L1 is connected to the second coil; the other end of the first resonant capacitor C3 is connected with the drain electrode of the MOS transistor switch Q3.1; the source of the MOS transistor switch Q3.1 is connected to one end of the resistor R1 and the source of the MOS transistor switch Q3.2, respectively, and the gate of the MOS transistor switch Q3.1 is connected to the other end of the resistor R1 and the gate of the MOS transistor switch Q3.2, respectively; and the source electrode of the MOS tube switch Q3.2 is connected with the second charging module.

Wherein, the electric capacity in this application is resonant capacitance, and follow-up no longer redundantly describes.

In the present application, as shown in fig. 5, all the MOS transistor switches (for example, MOS transistor switch Q1.1, MOS transistor switch Q1.2, MOS transistor switch Q2.1, MOS transistor switch Q2.2, MOS transistor switch Q3.1, MOS transistor switch Q3.2, MOS transistor switch Q4.1, MOS transistor switch Q4.2, MOS transistor switch Q5.1, or MOS transistor switch Q5.2) are NMOS transistors, and their internal structures are: the source and the drain of the MOS tube switch are connected through a diode, and the subsequent description is omitted.

In the embodiment of the present application, the MOS transistor switch Q3.1 and the MOS transistor switch Q3.2 in the first charging module 2 constitute a back-to-back switching MOS path, that is, a first path switch, that is, an "H bridge path", when the first enable signal GATE1 is a high-level enable signal, the MOS transistor switch Q3.1 and the MOS transistor switch Q3.2 are turned on, and the first coil L1 and the first resonant capacitor C3 are connected to the "H bridge path", so that it is determined that the charging circuit corresponding to the first charging module 2 is turned on, that is, the wireless charger can charge the electronic device coupled and matched with the first coil L1.

Further, if the MOS transistor switch Q3.1 and the MOS transistor switch Q3.2 are turned off, i.e. not turned on, when the first enable signal GATE1 is a low-level enable signal, then the first coil L1 and the first resonant capacitor C3 cannot pass current, and it is determined that the charging circuit corresponding to the first charging module 2 is turned off.

In one possible example, as shown in fig. 5, the second charging module 3 comprises: the second coil L2, the resistor R2, the second resonant capacitor C4, the MOS tube switch Q4.1 and the MOS tube switch Q4.2; wherein one end of the second coil L2 is connected to one end of the second resonant capacitor C4, and the other end of the second coil L2 is connected to the first coil L1; the other end of the second resonant capacitor C4 is connected with the drain electrode of the MOS transistor switch Q4.1; the source of the MOS transistor switch Q4.1 is connected to one end of the resistor R2 and the source of the MOS transistor switch Q4.2, respectively, and the gate of the MOS transistor switch Q4.1 is connected to the other end of the resistor R2 and the gate of the MOS transistor switch Q4.2, respectively; and the drain electrode of the MOS tube switch Q4.2 is connected with the drain electrode of the MOS tube switch Q3.2.

In the embodiment of the present application, the MOS transistor switch Q4.1 and the MOS transistor switch Q4.2 in the second charging module 3 constitute a back-to-back switching MOS path, that is, a second path switch, that is, an "H-bridge path"; when the second enable signal GATE2 is a high-level enable signal, the MOS transistor switch Q4.1 and the MOS transistor switch Q4.2 are turned on, and the second coil L2 and the second resonant capacitor C4 are connected to the "H-bridge path", so that it is determined that the charging circuit corresponding to the second charging module 3 is turned on, that is, the wireless charger can charge the electronic device coupled and matched with the second coil L2.

Further, if the MOS transistor switch Q4.1 and the MOS transistor switch Q4.2 are turned off, i.e., not turned on, when the second enable signal GATE2 is a low-level enable signal, then the second coil L2 and the second resonant capacitor C4 cannot pass current, and it is determined that the charging circuit corresponding to the second charging module 3 is turned off.

In one possible example, as shown in fig. 5, the wireless charger further includes: a capacitor C1, a MOS tube switch Q1.1, a MOS tube switch Q1.2 and a resistor R4; wherein the content of the first and second substances,

one end of the capacitor C1 is grounded, and the other end of the capacitor C1 is connected with the drain electrode of the MOS transistor switch Q1.1;

the source electrode of the MOS tube switch Q1.1 is connected with the drain electrode of the MOS tube switch Q1.2, the source electrode of the MOS tube switch Q1.2 is connected with one end of the resistor R4, and the other end of the resistor R4 is grounded.

In one possible example, as shown in fig. 5, the source of the MOS transistor switch Q1.1 is connected to the other end of the first coil L1 and the other end of the second coil L2, and the drain of the MOS transistor switch Q1.2 is connected to the other end of the first coil L1 and the other end of the second coil L2.

In one possible example, as shown in fig. 5, the wireless charger further includes: a capacitor C2, a MOS tube switch Q2.1 and a MOS tube switch Q2.2; wherein the content of the first and second substances,

one end of the capacitor C2 is grounded, and the other end of the capacitor C2 is connected with the drain electrode of the MOS transistor switch Q2.1;

the source electrode of the MOS tube switch Q2.1 is connected with the drain electrode of the MOS tube switch Q2.2;

the source of the MOS transistor switch Q2.2 is connected to one end of the resistor R4 and ground.

After the direct current voltage enters the circuit shown in fig. 5, the direct current voltage can be converted into an alternating current voltage through the H-bridge circuit, and the alternating current voltage is input to the charging module (the first charging module 2, the second charging module 3 or the fourth charging module 4), and the two ends of the coil and the resonant capacitor in the charging module are alternately charged or discharged, so that a changing magnetic field can be generated in the coil, and the wireless charging process of the electronic device matched with the coil in the charging module can be completed.

Specifically, since the H-bridge circuit needs a large current at the switching moment, the capacitor C1 and the capacitor C2 may provide an instantaneous current for the H-bridge circuit.

In one possible example, as shown in fig. 5, the wireless charger further comprises a third charging module 4;

the main control module 1 is further configured to output a third enable signal to the third charging module 4;

and the third charging module 4 is configured to receive the third enable signal, and turn on a charging circuit of the third charging module 4, so as to charge the electronic device coupled and matched with the second coil.

Wherein the third charging module 4 includes a second coil, the second coil L2 is shared by the third charging module 4 and the second charging module 2, but the corresponding resonant capacitances (the second resonant capacitance C4 and the third resonant capacitance C5) are different.

The third charging module 4 is different from the first charging module 2 and the second charging module 3; specifically, the first charging module 2 and the second charging module 3 may be both used for charging an electronic device with a standard charging protocol, the third charging module 4 may be used for charging an electronic device with a non-standard charging protocol, and the non-standard charging protocol may be set by a user or default, which is not limited herein; therefore, the application range of the wireless charger can be enlarged, the practicability of the wireless charger can be improved, and different charging requirements can be met.

In one possible example, as shown in fig. 5, the third charging module 4 includes: the resistor R3, the third resonant capacitor C5, the MOS tube switch Q5.1 and the MOS tube switch Q5.2; the MOS tube switch Q5.1 and the MOS tube switch Q5.2 form a third path switch; one end of the third resonant capacitor C5 is connected to the second charging module, and the other end of the third resonant capacitor C5 is connected to the drain of the MOS transistor switch Q5.1; the source of the MOS transistor switch Q5.1 is connected to one end of the resistor R3 and the source of the MOS transistor switch Q5.2, respectively, and the gate of the MOS transistor switch Q5.1 is connected to the other end of the resistor R3 and the gate of the MOS transistor switch Q5.2, respectively; and the source electrode of the MOS tube switch Q5.2 is respectively connected with the first charging module and the second charging module.

In the embodiment of the present application, the MOS transistor switch Q5.1 and the MOS transistor switch Q5.2 in the third charging module 4 constitute a back-to-back MOS switch path, that is, a third path switch, that is, an "H-bridge path"; when the third enable signal GATE3 is a high-level enable signal, the MOS transistor switch Q5.1 and the MOS transistor switch Q5.2 are turned on, and the second coil L2 and the second resonant capacitor C4 are connected to the "H-bridge path", so that it is determined that the charging circuit corresponding to the third charging module 4 is turned on, that is, the wireless charger may charge the electronic device coupled and matched with the second coil L2 through the third charging module 4.

Further, if the MOS transistor switch Q5.1 and the MOS transistor switch Q5.2 are turned off, i.e. not turned on, when the third enable signal GATE3 is a low-level enable signal, then the third resonant capacitor C5 cannot pass current, and it is determined that the circuit corresponding to the third charging module 4 is turned off.

In specific implementation, when the main control module 1 sends a first enable signal to the first charging module 2, the first enable signal is at a high level, and both the second enable signal and the third enable signal are at a low level; that is, the charging circuit of the first charging module 2 is turned on, the charging circuit of the second charging module 3 and the circuit of the third charging module 4 are turned off, and at this time, the wireless charger can charge the electronic device coupled and matched with the first coil L1 through the first charging module 2.

Further, when the main control module 1 sends a second enable signal to the second charging module 3, the second enable signal is at a high level, and both the first enable signal and the third enable signal are at a low level; that is, the charging circuit of the second charging module 3 is turned on, and the charging circuit of the first charging module 2 and the circuit of the third charging module 4 are turned off, so that the wireless charger can charge the electronic device coupled and matched with the second coil L2 through the second charging module 3.

Further, when the main control module 1 sends a third enable signal to the third charging module 4, the third enable signal is at a high level, and both the first enable signal and the second enable signal are at a low level; therefore, the wireless charger can cut off the first charging module 2 and the second charging module 3 through the third charging module, namely, the charging circuit of the first charging module 2 and the charging circuit of the second charging module 3 are disconnected, the wireless charger charges through the third charging module at the moment, the third charging module and the second charging module share a coil, but the capacitance value of the resonant capacitor is different, and the wireless charger aims to match more receiving devices (electronic devices) so as to meet different charging requirements.

It can be seen that, in the embodiment of the present application, the circuit implementation principle of the wireless charger is as follows: the wireless charger is by master control module control MOS pipe switch Q3.1, MOS pipe switch Q3.2, MOS pipe switch Q4.1, MOS pipe switch Q4.2, and switching-on of MOS pipe switch Q5.1 and MOS pipe switch Q5.2 selects switching on of first coil or second coil and resonance capacitor, and then realizes charging to different electronic equipment.

In addition, Q3.1 and Q3.2, Q4.1 and Q4.2, and Q5.1 and Q5.2 are two back-to-back NMOS transistors, and the on/off of the path formed by the first coil L1 and the first resonant capacitor C3 is realized by the first enable signal. Similarly, the second coil L2 and the second resonant capacitor C4 form a path that is switched by the second enable signal. The third enable signal turns on and off the path formed by the second coil L2 and the third resonant capacitor C5.

That is to say, different enable signals, namely, the first enable signal, the second enable signal and the third enable signal, can be sent or output by the main control module to control the charging state of the wireless charger, namely, to control the connection or disconnection of the first charging module, the second charging module or the third charging module, so as to meet the wireless charging requirements of different electronic devices.

In one possible example, as shown in fig. 5, the source of the MOS transistor switch Q2.1 is connected to the drain of the MOS transistor switch Q3.2, the drain of the MOS transistor switch Q4.2, the drain of the MOS transistor switch Q5.2 and the drain of the MOS transistor switch Q2.2.

Referring to fig. 6, a schematic circuit structure diagram of a main control module 1 is shown, specifically, the main control module 1 includes: the main control chip U1, the resistor R5, the resistor R6, the capacitor C6, the capacitor C7, the diode D1 and the diode D2; the main control chip U1 is connected to one end of the capacitor C7, and the other end of the capacitor C7 is connected to the resistor R6, the capacitor C6, and the resistor R5, respectively; the resistor R5 is connected to the output terminals of the diode D1 and the diode D2, respectively.

Wherein, master control chip U1 still can include other 7 ports, is respectively: GATE1 port, GATE2 port, GATE3 port, PWM1-H port, PWM1-L port, PWM2-H port, and PWM2-L port.

The main control chip U1 may further include a VDEM (voltage demodulator) interface, and may be used for ASK (amplitude monitoring) modulation and demodulation, that is, may be used to receive data sent by an electronic device.

As shown in fig. 5, the GATE of the MOS transistor switch Q3.1, the other end of the resistor R1, and the GATE of the MOS transistor switch Q3.2 are respectively connected to the GATE1 port of the main control module, and the first enable signal can be output or sent through the GATE1 port.

As shown in fig. 5, the GATE of the MOS transistor switch Q4.1, the other end of the resistor R2, and the GATE of the MOS transistor switch Q4.2 are respectively connected to the GATE2 port of the main control module, and the second enable signal can be output or sent through the GATE2 port.

As shown in fig. 5, the GATE of the MOS transistor switch Q5.1, the other end of the resistor R3, and the GATE of the MOS transistor switch Q5.2 are respectively connected to the GATE3 port of the main control module, and the third enable signal can be output or sent through the GATE3 port.

As shown in fig. 5, the gate of the MOS transistor switch Q1.1 is connected to the PWM1-H port of the main control module, the gate of the MOS transistor switch Q1.2 is connected to the PWM1-L port of the main control module, the gate of the MOS transistor switch Q2.1 is connected to the PWM2-H port, and the gate of the MOS transistor switch Q2.2 is connected to the PWM2-L port.

In the embodiment of the application, in order to generate an alternating current in the first coil and/or the second coil to perform electromagnetic induction with the electronic device, so as to realize a wireless charging function, signals sent by the PWM1-H port, the PWM1-L port, the PWM2-H port, and the PWM2-L port of the main control module are full-bridge inversion control signals, and respectively control four corresponding MOS switches, such as the MOS switch Q1.1, the MOS switch Q1.2, the MOS switch Q2.1, and the MOS switch Q2.2, to convert a direct current voltage into an alternating current voltage.

It can be seen that, in the present application, when the GATE1 port outputs the first enable signal, the line formed by the first coil L1 and the first resonant capacitor C3 is turned on, and the line formed by the second coil and the second resonant capacitor C4 and the third resonant capacitor C5 is turned off, so that the wireless charger can charge the electronic device. When the GATE2 port outputs the second enable signal, the line formed by the second coil L2 and the second resonant capacitor C4 is turned on, and the line formed by the first coil L1 and the second first resonant capacitor C3 is turned off, so that the wireless charger can charge the electronic device. When the GATE3 port outputs the third enable signal, the line formed by the first coil L1 and the second first resonant capacitor C3 and the line formed by the second coil L2 and the second resonant capacitor C4 are turned off, and the line formed by the second coil L2 and the second resonant capacitor C5 is turned on, and the wireless charging is performed by using the third charging module. The GATE1 port, the GATE2 port and the GATE3 port can poll to send out enable control signals to control the on-off of each path, and therefore the wireless charging requirement that one set of equipment is compatible with various products is met.

In one possible example, the master chip U1 is configured to output the first enable signal, the second enable signal, and the third enable signal; when the first enable signal is 1, setting the second enable signal and the third enable signal to be 0, and switching on the charging circuit of the first charging module and switching off the charging circuits of the second charging module and the third charging module by the wireless charger; when the second enable signal is 1, setting the first enable signal and the third enable signal to be 0, and switching on a charging circuit of the second charging module and switching off the charging circuits of the first charging module and the third charging module by the wireless charger; when the third enable signal is 1, the first enable signal and the second enable signal are set to be 0, the wireless charger is connected with the charging circuit of the third charging module, and the charging circuit of the first charging module and the charging circuit of the second charging module are cut off.

The main control chip U1 can be used to output three enable signals, and control the on/off of the charging circuit corresponding to each charging module in the whole wireless charger through the three enable signals.

The three enable signals (the first enable signal, the second enable signal, and the third enable signal) cannot be 1 at the same time, and at a certain time, if any one of the enable signals is output as 1 (level), the remaining two enable signals are output as 0 (level).

Fig. 7 is a schematic timing diagram of polling an enable signal according to an embodiment of the present application; under the standby condition of the wireless charger, the main control chip U1 can control the first enable signal (GATE 1), the second enable signal (GATE 2) and the third enable signal (GATE 3) to perform signal polling at the timing shown in the figure, and in one polling period (T), the three enable signals are output in a polling mode; as shown, at the first time of any one of the polling cycles, the GATE1 output is at 1 level, the remaining two enable signals (GATE 2 and GATE 3) output at 0 level, at the second time, the GATE2 output is at 1 level, the remaining two enable signals (GATE 1 and GATE 3) output at 0 level, at the third time, the GATE3 output is at 1 level, and the remaining two enable signals (GATE 1 and GATE 2) output at 0 level. Thus, at any one time, any one of the enable signal outputs is always kept at the 1 level, and the remaining enable signal outputs are kept at the 0 level, so that polling of three enable signals can be maintained.

For example, as shown in fig. 8, as a timing diagram of enabling signal polling, the main control chip U1 outputs a first enabling signal (GATE 1), a second enabling signal (GATE 2) and a third enabling signal (GATE 3) in a polling manner, if an electronic device is connected at this time, when the main control chip U1 polls to output the first enabling signal (GATE 1), and at this time, the electronic device is coupled and matched with the first coil, the electronic device may be charged through the first coil, the main control chip U1 may stop polling to output the first enabling signal (GATE 1), the second enabling signal (GATE 2) and the third enabling signal (GATE 3), may continuously output the first enabling signal (GATE 1), and turn on the charging circuit of the first charging module, so as to charge the electronic device through the wireless charger; in addition, after the electronic device is charged, the main control chip U1 continues to poll and output the three enable signals.

In addition, in the present application, when the coil size in the electronic device is matched with the coil in the wireless charger during the polling operation on the first coil and the second coil, the electromagnetic coupling between the coil in the electronic device and the coil in the wireless charger is strong, that is, it can be determined that the coil in the electronic device is matched with the coil in the wireless charger, and the wireless charger can charge the electronic device; on the contrary, when the coil size in the electronic device is not matched with the coil in the wireless charger, the electromagnetic coupling between the coil in the electronic device and the coil in the wireless charger is weak, and then it can be determined that the coil in the electronic device is not matched with the coil coupling in the wireless charger, and the wireless charger cannot charge the electronic device.

The application provides an electronic device, which comprises the electronic device provided by any one of the above embodiments.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A wireless charger, wherein the charger comprises: the charging system comprises a main control module, a first charging module and a second charging module; the first charging module comprises a first coil, a first resonant capacitor and a first path switch, the second charging module comprises a second coil, a second resonant capacitor and a second path switch, and the second coil is embedded in the first coil;

2. The wireless charger of claim 1 wherein the first coil and the second coil are planar helices, the second coil being centered on the first coil.

3. The wireless charger of claim 2, further comprising: a first magnetic conductive sheet and a magnet;

the first magnetic conductive sheet is used for placing the first coil, and an opening is formed in the center of the first magnetic conductive sheet and used for placing the magnet to magnetically attract electronic equipment coupled and matched with the first coil or electronic equipment coupled and matched with the second coil in the wireless charging process.

4. The wireless charger of claim 3, further comprising: a second magnetic conductive sheet;

the second magnetic conductive sheet is arranged on the first magnetic conductive sheet, is positioned in the center of the first coil and is used for placing the second coil.

5. The wireless charger of claim 2, further comprising a third magnetically permeable sheet;

the third magnetic conductive sheet is used for placing the first coil and the second coil.

6. The wireless charger of claim 1, wherein the first charging module and the second charging module are connected in parallel.

7. The wireless charger of claim 6, wherein the first charging module comprises: the first coil L1, the resistor R1, the first resonant capacitor C3, the MOS tube switch Q3.1 and the MOS tube switch Q3.2; the MOS tube switch Q3.1 and the MOS tube switch Q3.2 form the first path switch;

one end of the first coil L1 is connected to one end of the first resonant capacitor C3, and the other end of the first coil L1 is connected to the second coil;

the other end of the first resonant capacitor C3 is connected with the drain electrode of the MOS transistor switch Q3.1;

the source of the MOS transistor switch Q3.1 is connected to one end of the resistor R1 and the source of the MOS transistor switch Q3.2, respectively, and the gate of the MOS transistor switch Q3.1 is connected to the other end of the resistor R1 and the gate of the MOS transistor switch Q3.2, respectively;

and the drain electrode of the MOS tube switch Q3.2 is connected with the second charging module.

8. The wireless charger of claim 7, wherein the second charging module comprises: the second coil L2, the resistor R2, the second resonant capacitor C4, the MOS tube switch Q4.1 and the MOS tube switch Q4.2; the MOS tube switch Q4.1 and the MOS tube switch Q4.2 form the second path switch;

one end of the second coil L2 is connected to one end of the second resonant capacitor C4, and the other end of the second coil L2 is connected to the first coil L1;

the other end of the second resonant capacitor C4 is connected with the drain electrode of the MOS transistor switch Q4.1;

the source of the MOS transistor switch Q4.1 is connected to one end of the resistor R2 and the source of the MOS transistor switch Q4.2, respectively, and the gate of the MOS transistor switch Q4.1 is connected to the other end of the resistor R2 and the gate of the MOS transistor switch Q4.2, respectively;

and the drain electrode of the MOS tube switch Q4.2 is connected with the drain electrode of the MOS tube switch Q3.2.

9. The wireless charger of claim 1, further comprising: a capacitor C1, a MOS tube switch Q1.1, a MOS tube switch Q1.2 and a resistor R4; wherein the content of the first and second substances,

10. The wireless charger of claim 9, wherein the source of the MOS transistor switch Q1.1 is connected to the other end of the first coil L1 and the other end of the second coil L2, and the drain of the MOS transistor switch Q1.2 is connected to the other end of the first coil L1 and the other end of the second coil L2.

11. The wireless charger of claim 7, wherein the charger further comprises a third charging module;

the main control module is further configured to output a third enable signal to the third charging module;

and the third charging module is used for receiving the third enabling signal and conducting a charging circuit of the third charging module so as to charge the electronic equipment coupled and matched with the second coil.

12. The wireless charger of claim 11, wherein the third charging module comprises: the resistor R3, the third resonant capacitor C5, the MOS tube switch Q5.1 and the MOS tube switch Q5.2; the MOS tube switch Q5.1 and the MOS tube switch Q5.2 form a third path switch;

one end of the third resonant capacitor C5 is connected to the second charging module, and the other end of the third resonant capacitor C5 is connected to the drain of the MOS transistor switch Q5.1;

the source of the MOS transistor switch Q5.1 is connected to one end of the resistor R3 and the source of the MOS transistor switch Q5.2, respectively, and the gate of the MOS transistor switch Q5.1 is connected to the other end of the resistor R3 and the gate of the MOS transistor switch Q5.2, respectively;

and the drain electrode of the MOS tube switch Q5.2 is respectively connected with the first charging module and the second charging module.

13. The wireless charger of claim 12, wherein the master control module comprises: the main control chip U1, the resistor R5, the resistor R6, the capacitor C6, the capacitor C7, the diode D1 and the diode D2; wherein the content of the first and second substances,

the main control chip U1 is connected with one end of the capacitor C7, and the other end of the capacitor C7 is respectively connected with the resistor R6, the capacitor C6 and the resistor R5;

the resistor R5 is connected to the output terminals of the diode D1 and the diode D2, respectively.

14. The wireless charger of claim 9, further comprising: a capacitor C2, a MOS tube switch Q2.1 and a MOS tube switch Q2.2; wherein the content of the first and second substances,

15. The wireless charger according to claim 14, wherein the source of the MOS transistor switch Q2.1 is connected to the drain of the MOS transistor switch Q3.2, the drain of the MOS transistor switch Q4.2, the drain of the MOS transistor switch Q5.2, and the drain of the MOS transistor switch Q2.2.

16. The wireless charger according to claim 13, wherein the main control chip U1 is configured to output the first enable signal, the second enable signal and the third enable signal; wherein the content of the first and second substances,

when the first enable signal is 1, setting the second enable signal and the third enable signal to be 0, and switching on a charging circuit of the first charging module and switching off the charging circuits of the second charging module and the third charging module by the wireless charger;

when the second enable signal is 1, setting the first enable signal and the third enable signal to be 0, and switching on a charging circuit of the second charging module and switching off the charging circuits of the first charging module and the third charging module by the wireless charger;

when the third enable signal is 1, the first enable signal and the second enable signal are set to be 0, the wireless charger is connected with the charging circuit of the third charging module, and the charging circuit of the first charging module and the charging circuit of the second charging module are cut off.