Wireless charging device

Abstract

A wireless charging device comprises a short-distance wireless communication chip, a plurality of charging modules, a plurality of limit switches, a switch element and a control module, and the control module is connected to the short-distance wireless communication chip, the plurality of charging modules, the plurality of limit switches and the switch element. The switch element is connected to the near field communication chip and the plurality of charging modules. The plurality of limit switches are respectively arranged on the plurality of charging modules. The control module is used for controlling the switch element to conduct the short-distance wireless communication chip and the short-distance wireless communication antenna of a target module in the plurality of charging modules according to the detection potentials of the plurality of limit switches.

Description

Technical Field

[0001] The invention relates to a wireless charging device. Background Art

[0002] The applications of Near Field Communication (NFC) in wireless charging mainly include NFC wireless charger location tracking, NFC wireless charger automatic switch, NFC wireless charging multi-purpose function, NFC wireless charger safety control and NFC wireless charger interactive function. In the application of near field wireless communication, antennas are usually used as components for sending and receiving wireless signals. The configuration of antennas needs to consider the corresponding coil position and layout, as well as the communication performance and signal strength of the antenna. Therefore, most existing practices configure a group of antennas and their corresponding coils for a near field wireless communication chip.

[0003] A wireless charging device usually requires a short-range wireless communication antenna and its corresponding coil, that is, a short-range wireless communication chip needs to be equipped with a set of antennas and corresponding coils. Therefore, in order to realize wireless charging of multiple devices at the same time, multiple wireless charging modules containing antennas are required to be equipped with multiple short-range wireless communication chips. This may increase the cost of implementation and may also take up more space on the printed circuit board. Summary of the invention

[0004] In view of the above, the present invention provides a wireless charging device.

[0005] According to an embodiment of the present invention, a wireless charging device comprises a short-distance wireless communication chip, a plurality of charging modules, a plurality of limit switches, a switch element and a control module, wherein the control module is connected to the short-distance wireless communication chip, the plurality of charging modules, the plurality of limit switches and the switch element. The switch element is connected to the short-distance wireless communication chip and the plurality of charging modules. The plurality of limit switches are respectively arranged in the plurality of charging modules. The control module is used to control the switch element to conduct the short-distance wireless communication chip and the short-distance wireless communication antenna of the target module in the plurality of charging modules according to the detection potential of each of the plurality of limit switches.

[0006] Through the above structure, the wireless charging device disclosed in this case can use multiple limit switches set in multiple charging modules to determine whether there is an object placed in the charging module, and use the switch element to connect the short-range wireless communication chip and the short-range wireless communication antenna of the charging module where the object is placed. In this way, compared with the wireless charging device that uses multiple short-range wireless communication chips to connect the short-range wireless communication antennas contained in each of the multiple charging modules, the wireless charging device disclosed in this case can use one short-range wireless communication chip to connect the short-range wireless communication antennas contained in each of the multiple charging modules without changing the function, thereby reducing the use cost of the short-range wireless communication chip, optimizing the circuit and increasing the accuracy of short-range wireless communication judgment.

[0007] The above description of the disclosed contents and the following description of the implementation modes are used to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a functional block diagram of a wireless charging device according to an embodiment of the present invention;

[0009] Figure 2 is a schematic diagram of a sensing signal integration circuit of a wireless charging device according to another embodiment of the present invention;

[0010] Figure 3 A schematic diagram of the arrangement relationship between a charging module and a limit switch of a wireless charging device according to an embodiment of the present invention;

[0011] Figure 4 is a control flow chart of a switch element of a wireless charging device according to an embodiment of the present invention;

[0012] Figure 5 FIG. 4 is a control flow chart of a charging module of a wireless charging device according to an embodiment of the present invention.

[0013] Explanation of symbols

[0014] 1: Wireless charging device

[0015] 11: Short distance wireless communication chip

[0016] 12,12_1,12_2: Charging module

[0017] 13,13_1,13_2: Limit switch

[0018] 14: Switching element

[0019] 15: Control module

[0020] 151:Microcontroller

[0021] 152: Wireless Charging Controller

[0022] 121,121_1,121_2: Short-range wireless communication antenna

[0023] 122:Substrate

[0024] 123: Charging coil

[0025] x,y,z: direction

[0026] S11, S12, S13, S14, S15, S16, S17, S18, S19, S20: Steps

[0027] D1, D2, D3, D4: light emitting diodes

[0028] R1, R2, R3, R4: resistors

[0029] H1,H2:Connector

[0030] AND GATE: AND gate

[0031] T1,T2,T3,T4,T5: endpoints DETAILED DESCRIPTION

[0032] The following detailed features and advantages of the present invention are described in detail in the embodiments, and the contents are sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. According to the contents disclosed in this specification, the scope of the patent application and the drawings, anyone skilled in the relevant art can easily understand the relevant purposes and advantages of the present invention. The following examples are to further illustrate the viewpoints of the present invention in detail, but are not intended to limit the scope of the present invention in any way.

[0033] Please refer to Figure 1 , Figure 1 FIG. 1 is a functional block diagram of a wireless charging device according to an embodiment of the present invention. Figure 1As shown, the wireless charging device 1 includes a short-distance wireless communication chip 11, charging modules 12_1 and 12_2, limit switches 13_1 and 13_2, a switch element 14 and a control module 15. The charging module 12_1 includes a short-distance wireless communication antenna 121_1, and the charging module 12_2 includes a short-distance wireless communication antenna 121_2. The switch element 14 is connected to the short-distance wireless communication chip 11 and the charging modules 12_1 and 12_2. The control module 15 is connected to the short-distance wireless communication chip 11, the charging modules 12_1 and 12_2, the limit switches 13_1 and 13_2 and the switch element 14. Further, the control module 15 may include a microcontroller 151 and a wireless charging controller 152. The microcontroller 151 can be connected to the short-range wireless communication chip 11 , the limit switches 13_1 and 13_2 , the switch element 14 and the wireless charging controller 152 , and the wireless charging controller 152 can be connected to the charging modules 12_1 and 12_2 .

[0034] The short-range wireless communication chip 11 is used to process signals based on short-range wireless communication technology. The charging modules 12_1 and 12_2 can each be placed for objects to be charged to provide wireless charging and wireless communication functions for the objects to be charged. Specifically, the charging modules 12_1 and 12_2 can be arranged in one or more bases, and the one or more bases have multiple charging areas for multiple objects to be charged to be placed, and the setting positions of the charging modules 12_1 and 12_2 in the base correspond to the multiple charging areas respectively. The short-range wireless communication chip 11 can be switched by the switch element 14 to send and receive signals based on short-range wireless communication technology through the short-range wireless communication antenna 121_1 in the charging module 12_1 or the short-range wireless communication antenna 121_2 in the charging module 12_2.

[0035] The limit switches 13_1 and 13_2 are respectively disposed on the charging modules 12_1 and 12_2, and are used to provide a detection potential indicating whether an object is placed on the charging modules 12_1 and 12_2. For example, the limit switches 13_1 and 13_2 may be double-acting roller limit switches. Specifically, the brake plate of the limit switch 13_1 may be exposed to the base through the charging area corresponding to the charging module 12_1, and the brake plate of the limit switch 13_2 may be exposed to the base through the charging area corresponding to the charging module 12_2. When an object is placed in the charging area corresponding to the charging module 12_1 and the limit switch 13_1 is triggered, the detection potential of the limit switch 13_1 may have a preset potential value; when an object is placed in the charging area corresponding to the charging module 12_2 and the limit switch 13_2 is triggered, the detection potential of the limit switch 13_2 may have a preset potential value. In other words, the preset potential value indicates that an object is placed in the charging area corresponding to the charging module 12_1 / 12_2. The preset potential value may be set according to the voltage received by the end point where the limit switch 13_1 / 13_2 is connected to the control module 15 or / and the common point of the limit switch 13_1 / 13_2, and the present invention is not limited thereto.

[0036] The switch element 14 is used to switch between the short-range wireless communication chip 11 and the short-range wireless communication antenna 121_1 in the charging module 12_1 or between the short-range wireless communication chip 11 and the short-range wireless communication antenna 121_2 in the charging module 12_2. For example, the switch element 14 can be a radio frequency switch element, providing a high-speed switching function.

[0037] The control module 15 is used to control the switch element 14 to conduct the signal transmission path between the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_1, or to conduct the signal transmission path between the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_2, or to conduct the above signal transmission paths in sequence according to a preset order according to the detection potential of the limit switches 13_1 and 13_2.

[0038] Specifically, when the limit switch 13_1 disposed in the charging module 12_1 has a detection potential of a preset potential value, the control module 15 can control the switch element 14 to conduct the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_1 of the charging module 12_1; when the limit switch 13_2 disposed in the charging module 12_2 has a detection potential of a preset potential value, the control module 15 can control the switch element 14 to conduct the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_2 of the charging module 12_2. In other words, the control module 15 can use the one of the charging modules 12_1 and 12_2 corresponding to the detection potential with the preset potential value as the target module to be conducted. Furthermore, the control module 15 can obtain the signal received by the short-distance wireless communication antenna 121_1 or 121_2 of the charging module 12_1 or 12_2 as the target module through the short-distance wireless communication chip 11, and then selectively control the charging module 12_1 or 12_2 to output power according to the signal. Furthermore, the control module 15 can confirm whether the received signal meets the preset charging standard, and when it is determined that the signal meets the preset charging standard, control the target module to output power.

[0039] In addition, when the detection potentials of the limit switches 13_1 and 13_2 both have preset potential values, the control module 15 can control the switch element 14 to sequentially conduct multiple signal transmission paths in a preset order. Taking the preset order of charging module 12_1 first and then charging module 12_2 as an example, the control module 15 can control the switch element 14 to first conduct the charging module 12_1 provided with the limit switch 13_1 with the short-distance wireless communication chip 11 to obtain the signal received by the short-distance wireless communication antenna 121_1, and then switch to conduct the charging module 12_2 provided with the limit switch 13_2 to obtain the signal received by the short-distance wireless communication antenna 121_2, that is, the charging modules 12_1 and 12_2 are both target modules to be conducted. Specifically, when the detection potentials of the limit switches 13_1 and 13_2 both have the preset potential values, it means that objects are placed on the charging modules 12_1 and 12_2 where the limit switches 13_1 and 13_2 are disposed, and the charging modules 12_1 and 12_2 are both target modules that can be controlled by the control module 15 to output power.

[0040] In another embodiment, in addition to the above components and modules, the wireless charging device 1 may further include a sensor signal integration circuit connected to the microcontroller 151 and the limit switches 13_1 and 13_2. The sensor signal integration circuit may integrate the detection potentials of the limit switches 13_1 and 13_2 and transmit the integrated detection potentials to the microcontroller 151. When the detection potential of at least one of the limit switches 13_1 and 13_2 has a preset potential value, the sensor signal integration circuit may transmit the signal after integrating the detection potentials to the microcontroller 151. For details, please refer to Figure 2 , Figure 2 FIG. 1 is a schematic diagram of a sensing signal integration circuit of a wireless charging device according to another embodiment of the present invention. Figure 2 As shown, the sensor signal integration circuit may include light emitting diodes D1 to D4, resistors R1 to R4, connectors H1 and H2, and an AND gate AND GATE, and has terminals T1 to T5, wherein the light emitting diodes D1 and D3 may emit light of a first color (e.g., red), and the light emitting diodes D2 and D4 may emit light of a second color (e.g., green). Further, the anode of the light emitting diode D1 is connected to the Figure 1 The normally closed contact of the limit switch 13_1 shown in FIG. 1 is connected to the anode of the light emitting diode D2 through the terminal T2. Figure 1 The normally open contact of the limit switch 13_1 shown in FIG. 1 is a limit switch 13_1. The cathode of the light emitting diode D1 is connected to one end of the resistor R1. The cathode of the light emitting diode D2 is connected to one end of the resistor R2. The other ends of the resistors R1 and R2 are grounded. In addition to being connected to one end of the resistors R1 and R2, the cathodes of the light emitting diodes D1 and D2 are also connected to the input end of the AND gate AND GATE through the connector H1. The anode of the light emitting diode D3 is connected to the input end of the AND gate AND GATE through the terminal T3. Figure 1 The normally closed contact of the limit switch 13_2 shown in FIG. 1 is connected to the anode of the light emitting diode D4 through the terminal T4. Figure 1 The normally open contact of the limit switch 13_2 shown in FIG. 1 is a limit switch 13_2. The cathode of the light emitting diode D3 is connected to one end of the resistor R3. The cathode of the light emitting diode D4 is connected to one end of the resistor R4. The other ends of the resistors R3 and R4 are grounded. In addition to being connected to one end of the resistors R3 and R4, the cathodes of the light emitting diodes D3 and D4 are also connected to the input end of the AND gate AND GATE through the connector H2. The output end of the AND gate AND GATE is connected to the input end of the AND gate AND GATE through the terminal T5. Figure 1 The microcontroller 151 shown in FIG. 1 is shown in FIG. 1 . It should be noted that although the input terminals of the connectors H1 and H2 are connected to Figure 1 The normally open contacts and normally closed contacts of the limit switches 13_1 and 13_2 are shown, however, the output terminals of the connectors H1 and H2 can be connected only to Figure 1The normally open contacts of the limit switches 13_1 and 13_2 shown, or the normally closed contacts connected to the limit switches 13_1 and 13_2, are connected to the normally open contacts as an example. When the brake plates of the limit switches 13_1 and 13_2 are triggered, the normally open nodes of the limit switches 13_1 and 13_2 are turned on, and the connectors H1 and H2 can output a voltage with a preset potential value to the AND gate AND GATE, wherein the preset potential value is, for example, the difference between the supply voltage of the limit switch and the voltage drop. Therefore, as long as at least one of the limit switches 13_1 and 13_2 is triggered, the AND gate AND GATE can output an integrated signal indicating a high potential (HIGH) to the microcontroller 151. It should be particularly noted that the light emitting diodes D1 to D4 are selectively arranged components.

[0041] Please refer to Figure 1 and Figure 3 , Figure 3 It is a schematic diagram of the arrangement relationship between a charging module and a limit switch of a wireless charging device according to an embodiment of the present invention. Figure 1 The arrangement relationship between the charging module 12_1 and the limit switch 13_1 and the arrangement relationship between the charging module 12_2 and the limit switch 13_2 can be the same as Figure 3 The setting relationship between the charging module 12 and the limit switch 13 is shown.

[0042] like Figure 3 As shown, the charging module 12 may include a short-distance wireless communication antenna 121, a substrate 122 and a charging coil 123, wherein the short-distance wireless communication antenna 121 and the charging coil 123 are arranged on the substrate 122, and in particular, are respectively arranged on two opposite surfaces of the substrate 122. Specifically, the short-distance wireless communication antenna 121 may be arranged on the substrate 122 along a setting direction z, and the projection on the setting direction z may not overlap with the limit switch 13. The charging coil 123 may be arranged on the substrate 122 along a setting direction z, and the projection on the setting direction z may not overlap with the limit switch 13. Thereby, the interference of the limit switch 13 to the short-distance wireless communication antenna 121 and / or the charging coil 123 may be reduced. It should be particularly noted here that, Figure 3 The illustration that the short-range wireless communication antenna 121 includes two coils and the charging coil 123 includes three coils is merely illustrative, and is not intended to limit the present invention.

[0043] Please refer to Figure 1 and Figure 4 ,in Figure 4 FIG. 1 is a control flow chart of a switch element of a wireless charging device according to an embodiment of the present invention. Figure 4As shown, the control process includes step S11: initialization; step S12: determine whether one of the multiple limit switches has a detection potential with a preset potential value; when the judgment result of step S12 is "no", execute step S11 and the steps subsequent to step S11 again; when the judgment result of step S12 is "yes", execute step S13: determine which of the multiple limit switches has a detection potential with a preset potential value; when the judgment result of step S13 is the first condition C1, execute step S14: connect the short-range wireless communication chip and the short-range wireless communication antenna of the charging module set by the first limit switch; and when the judgment result of step S13 is the second condition C2, execute step S15: connect the short-range wireless communication chip and the short-range wireless communication antenna of the charging module set by the second limit switch. The above steps are applicable to Figure 1 The wireless charging device 1 is shown, and each step is described in detail below based on the operation of the wireless charging device 1 .

[0044] In step S11 and step S12, the microcontroller 151 is initialized and determines whether the detection potential of one of the limit switches 13_1 and 13_2 has a preset potential value. Specifically, when the determination result of step S12 is that the detection potential of one of the limit switches 13_1 and 13_2 has the preset potential value, step S13 is executed. When the determination result of step S12 is that the detection potential of neither of the limit switches 13_1 and 13_2 has the preset potential value, step S11 and the steps subsequent to step S11 are executed again.

[0045] In step S13, the microcontroller 151 determines which detection potential of the limit switch 13_1 and 13_2 has a preset potential value. Specifically, when the determination result of step S13 is that the detection potential of the limit switch 13_1 has the preset potential value (first condition C1), step S14 is executed, and when the determination result of step S13 is that the detection potential of the limit switch 13_2 has the preset potential value (second condition C2), step S15 is executed. Further, when the determination result of step S13 is that the detection potentials of both the limit switches 13_1 and 13_2 have the preset potential value, the preset order may be to execute step S14 first and then execute step S15.

[0046] In step S14, the switch element 14 conducts the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_1 of the charging module 12_1 set by the first limit switch 13_1. Specifically, after the switch element 14 conducts the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_1, the short-distance wireless communication chip 11 can perform wireless communication through the short-distance wireless communication antenna 121_1.

[0047] In step S15, the switch element 14 conducts the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_2 of the charging module 12_2 set by the second limit switch 13_2. Specifically, after the switch element 14 conducts the short-distance wireless communication chip 11 and the short-distance wireless communication antenna 121_2, the short-distance wireless communication chip 11 can perform wireless communication through the short-distance wireless communication antenna 121_2.

[0048] In particular, the above step S12 is a selectively executed step. In one embodiment, after the step S11 is executed, the step S13 and its subsequent steps can be directly executed.

[0049] Please refer to Figure 1 and Figure 5 , Figure 5 FIG. 1 is a control flow chart of a charging module of a wireless charging device according to an embodiment of the present invention. In this embodiment, the control flow of the wireless charging device includes Figure 4 The steps S11 to S15 of controlling the switch element shown in the figure may further include: Figure 5 Step S16 shown: obtaining the data to be identified from the turned-on short-distance wireless communication antenna through the short-distance wireless communication chip; step S17: determining whether the data to be identified meets the preset charging standard; when the determination result of step S17 is "yes", executing step S18: controlling the charging module corresponding to the turned-on short-distance wireless communication antenna to output power; when the determination result of step S17 is "no", executing step S20: sending a notification message; step S19: determining whether the detection potential corresponding to the charging module that outputs power has been converted from having a preset potential value to not having a preset potential value; when the determination result of step S19 is "yes", executing step S12 and the steps subsequent to step S12; and when the determination result of step S19 is "no", continuing to execute step S18. The above steps are applicable to Figure 1 The wireless charging device 1 is shown, and each step is described in detail below based on the operation of the wireless charging device 1 .

[0050] In step S16, the microcontroller 151 obtains the data to be identified from the short-distance wireless communication antenna 121_1 or / and 121_2 that are turned on through the short-distance wireless communication chip 11. Specifically, after the short-distance wireless communication chip 11 is turned on with the short-distance wireless communication antenna 121_1 of the charging module 12_1 set by the first limit switch 13_1 or / and the short-distance wireless communication antenna 121_2 of the charging module 12_2 set by the second limit switch 13_2 in step S14 and step S15, the microcontroller 151 can obtain the data to be identified wirelessly transmitted from the short-distance wireless communication antenna 121_1 or / and 121_2 that are turned on through the short-distance wireless communication chip 11.

[0051] In step S17, the microcontroller 151 determines whether the data to be identified meets the preset charging standard. Specifically, when the judgment result of step S17 is that the data to be identified meets the preset charging standard, step S18 is executed, and when the judgment result of step S17 is that the data to be identified does not meet the preset charging standard, step S20 is executed. Further, the preset charging standard can be an interconnection standard for power transmission, such as power transmission efficiency and wireless charging power. For example, when the data to be identified can receive 70% power transmission efficiency and 5 watts (W) of wireless charging power, it means that the preset charging standard is met.

[0052] In step S18, the microcontroller 151 controls the charging module 12_1 corresponding to the turned-on short-distance wireless communication antenna 121_1 or / and the charging module 12_2 corresponding to the short-distance wireless communication antenna 121_2 to output power through the charging controller 152. Specifically, when it is determined that the data to be identified transmitted by the object placed on the charging module 12_1 or / and the charging module 12_2 meets the preset charging standard, the charging controller 152 can control the charging module 12_1 or / and the charging module 12_2 on which the object is placed to output power. More specifically, the turned-on short-distance wireless communication antenna 121_1 or / and 121_2 can transmit the power information of the object to be charged to the microcontroller 151 through the Qi protocol, and the microcontroller 151 generates control parameters such as charging frequency and wattage and controls the corresponding charging module 12_1 or / and 12_2 to output power through the charging controller 152. In addition, during the process of the charging module 12_1 and / or 12_2 outputting power, the microcontroller 151 may also execute a foreign object detection (FOD) program.

[0053] In step S19, the microcontroller 151 determines whether the detection potential corresponding to the charging module 12_1 or / and 12_2 that outputs power is converted from a preset potential value to a value without a preset potential value. Specifically, when the judgment result of step S19 is that the detection potential corresponding to the charging module 12_1 or / and 12_2 that outputs power is converted from a preset potential value to a value without a preset potential value, step S12 is executed. When the judgment result of step S19 is that the detection potential corresponding to the charging module 12_1 or / and 12_2 that does not output power is converted from a preset potential value to a value without a preset potential value, step S18 is continued. Further, when the judgment result of step S19 is that the detection potential corresponding to the charging module 12_1 or / and 12_2 that outputs power is converted from a preset potential value to a value without a preset potential value, the charging controller 152 can control the charging module 12_1 or / and 12_2 that outputs power to stop outputting power.

[0054] In step S20, the microcontroller 151 may send a notification message through an output component. Specifically, the output component is connected to the microcontroller 151 to be controlled by the microcontroller 151 to send the notification message. For example, the output component may be an output component such as a prompt light, a display, a speaker, or a wired or wireless communication port.

[0055] It should be noted that the above embodiments exemplarily take two sets of charging modules and limit switches as an example. However, in other embodiments, the wireless charging device may include more sets of charging modules and limit switches.

[0056] In one or more embodiments of the present invention, the wireless charging device of the present invention can be applied to vehicle-mounted devices, such as self-driving cars, electric cars, or semi-autonomous cars.

[0057] Through the above structure, the wireless charging device disclosed in this case can use multiple limit switches set in multiple charging modules to determine whether there is an object placed in the charging module, and use the switch element to connect the short-range wireless communication chip and the short-range wireless communication antenna of the charging module where the object is placed. In this way, compared with the wireless charging device that uses multiple short-range wireless communication chips to connect the short-range wireless communication antennas contained in each of the multiple charging modules, the wireless charging device disclosed in this case can use one short-range wireless communication chip to connect the short-range wireless communication antennas contained in each of the multiple charging modules without changing the function, thereby reducing the use cost of the short-range wireless communication chip, optimizing the circuit and increasing the accuracy of short-range wireless communication judgment.

[0058] Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all changes and modifications are within the scope of patent protection of the present invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

Claims

1. A wireless charging device, characterized in that: Include: A short distance wireless communication chip; A plurality of charging modules, each comprising a short-range wireless communication antenna; A plurality of limit switches are respectively arranged on the charging modules; a switch element, connecting the short-range wireless communication chip and the charging modules; and A control module is connected to the short-range wireless communication chip, the charging modules, the limit switches and the switch element, and is used to control the switch element to conduct the short-range wireless communication chip and the short-range wireless communication antenna of a target module in the charging modules according to the respective detection potentials of the limit switches.

2. The wireless charging device according to claim 1, characterized in that: The control module is used to use one of the charging modules corresponding to the detection potential with a preset potential value as the target module.

3. The wireless charging device according to claim 1, characterized in that: The control module is used to control the switch element to connect at least two charging modules among the charging modules, each of which is provided with at least two limit switches, to the short-range wireless communication chip in sequence in a preset order when the detection potential of each of at least two limit switches among the limit switches has a preset potential value, and the at least two charging modules include the target module.

4. The wireless charging device according to claim 1, characterized in that: The control module is further used to obtain a to-be-identified data from the turned-on short-distance wireless communication antenna through the short-distance wireless communication chip, determine whether the to-be-identified data meets a preset charging standard according to the to-be-identified data, and control the target module to output power when it is determined that the to-be-identified data meets the preset charging standard.

5. The wireless charging device according to claim 4, characterized in that: Also includes: an output component connected to the control module, The control module is further configured to send a notification message through the output component when it is determined that the data to be identified does not meet the preset charging standard.

6. The wireless charging device according to claim 4, characterized in that: The control module is further configured to control the target module to stop outputting power when the detection potential corresponding to the target module changes from having the preset potential value to not having the preset potential value.

7. The wireless charging device according to claim 1, characterized in that: Each of the charging modules further comprises: a substrate; and a charging coil, disposed on the substrate along a setting direction, and a projection in the setting direction does not overlap with the limit switches, The short-distance wireless communication antenna is arranged on the substrate.

8. The wireless charging device according to claim 1, characterized in that: Each of the charging modules further comprises: a substrate; and a charging coil, disposed on the substrate, The short-distance wireless communication antenna is arranged on the substrate along a setting direction, and the projection in the setting direction does not overlap with the limit switches.

9. The wireless charging device according to claim 1, characterized in that: The limit switches are each a double-acting roller limit switch.

10. The wireless charging device according to claim 1, characterized in that: The switch element is a radio frequency switch element.

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