TWI883529B - Wireless charging device - Google Patents

Abstract

A wireless charging device includes Near-Field Communication chip, the plurality of charging modules, the plurality of limit switches, the switching element and the control module, wherein the control module is connected to the Near-Field Communication chip, the plurality of charging modules, the plurality of limit switches, and the switching element; the switching element is connected to the Near-Field Communication chip and the said plurality of charging modules. The said plurality of limit switches are located in the said plurality of charging modules. The control module is used to control the switching element to conduct the Near-Field Communication chip and the Near-Field Communication antenna of the target module in the plurality of charging modules according to the respective detection voltages of the plurality of limit switches.

Description

Wireless charging device

The present invention relates to a wireless charging device.

The applications of Near Field Communication (NFC) in wireless charging mainly include NFC wireless charger location tracking, NFC wireless charger automatic switching, NFC wireless charger 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 position and layout of the corresponding coils, as well as the communication performance and signal strength of the antennas. Therefore, most existing practices configure a set of antennas and their corresponding coils for a near field wireless communication chip.

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, each with multiple short-range wireless communication chips. This may increase the cost of implementation and may also occupy more space on the printed circuit board.

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

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 antenna between the short-distance wireless communication chip and the target module in the plurality of charging modules according to the respective detection potentials of the plurality of limit switches.

With the above structure, the wireless charging device disclosed in this case can use multiple limit switches set in multiple charging modules to determine whether an object is 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. Thus, compared with a wireless charging device that uses multiple short-range wireless communication chips to connect the short-range wireless communication antennas included in 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 included in 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.

The above description of the disclosed content and the following description of the implementation methods are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

The following detailed description of the features and advantages of the present invention is provided in the implementation mode, and the content is sufficient to enable any person skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Moreover, according to the content disclosed in this specification, the scope of the patent application and the drawings, any person skilled in the relevant art can easily understand the relevant purposes and advantages of the present invention. The following embodiments are to further explain the viewpoints of the present invention in detail, but are not to limit the scope of the present invention by any viewpoint.

Please refer to FIG. 1, which is a functional block diagram of a wireless charging device according to an embodiment of the present invention. As shown in FIG. 1, the wireless charging device 1 includes a short-range 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-range wireless communication antenna 121_1, and the charging module 12_2 includes a short-range wireless communication antenna 121_2. The switch element 14 is connected to the short-range wireless communication chip 11 and the charging modules 12_1 and 12_2. The control module 15 is connected to the short-range 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. In other words, the control module 15 may include a microcontroller 151 and a wireless charging controller 152. The microcontroller 151 may 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 may be connected to the charging modules 12_1 and 12_2.

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 set 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 NFC chip 11 can transmit and receive signals based on NFC technology through the NFC antenna 121_1 in the charging module 12_1 or the NFC antenna 121_2 in the charging module 12_2 by switching the switch element 14 .

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 can be double-acting roller limit switches. Specifically, the brake plate of the limit switch 13_1 can 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 can 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.

The switch element 14 is used to switch to connect the short-range wireless communication chip 11 and the short-range wireless communication antenna 121_1 in the charging module 12_1 or to connect 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.

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 a preset order according to the detection potential of the limit switches 13_1 and 13_2.

Specifically, when the limit switch 13_1 disposed in the charging module 12_1 has a detection potential with 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 with 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.

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 a plurality of signal transmission paths in a preset sequence. Taking the default sequence 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 connect the charging module 12_1 provided with the limit switch 13_1 to 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 connect 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 connected. Specifically, when the detection potentials of the limit switches 13_1 and 13_2 both have 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.

In another embodiment, in addition to the above-mentioned components and modules, the wireless charging device 1 may further include a sensor signal integration circuit connected to the microcontroller 151, the limit switches 13_1 and 13_2, and 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. Specifically, please refer to FIG. 2, which is a schematic diagram of a sensor signal integration circuit of a wireless charging device according to another embodiment of the present invention. As shown in FIG. 2 , the sensor signal integration circuit may include LEDs D1 to D4, resistors R1 to R4, connectors H1 and H2, and an AND gate, and has terminals T1 to T5, wherein the LEDs D1 and D3 may emit light of a first color (e.g., red), and the LEDs D2 and D4 may emit light of a second color (e.g., green). Specifically, the anode of the LED D1 is connected to the normally closed contact of the limit switch 13_1 shown in FIG. 1 through the terminal T1, the anode of the LED D2 is connected to the normally open contact of the limit switch 13_1 shown in FIG. 1 through the terminal T2, the cathode of the LED D1 is connected to one end of the resistor R1, the cathode of the LED D2 is connected to one end of the resistor R2, the other ends of the resistors R1 and R2 are grounded, the cathodes of the LED D1 and the LED D2 are connected to one end of the resistors R1 and R2 respectively, and are also connected to the input end of the AND gate AND through the connector H1; the anode of the LED D3 is connected to the input end of the AND gate AND through the connector H1. The terminal T3 is connected to the normally closed contact of the limit switch 13_2 shown in FIG. 1 , the anode of the LED D4 is connected to the normally open contact of the limit switch 13_2 shown in FIG. 1 through the terminal T4, the cathode of the LED D3 is connected to one end of the resistor R3, the cathode of the LED D4 is connected to one end of the resistor R4, the other ends of the resistors R3 and R4 are grounded, the cathodes of the LEDs D3 and D4 are connected to one end of the resistors R3 and R4 respectively, and are also connected to the input end of the AND gate AND through the connector H2; the output end of the AND gate AND is connected to the microcontroller 151 shown in FIG. 1 through the terminal T5. It should be noted that although the input terminals of the connectors H1 and H2 are connected to the normally open contacts and normally closed contacts of the limit switches 13_1 and 13_2 shown in FIG. 1 , the output terminals of the connectors H1 and H2 may be connected only to the normally open contacts of the limit switches 13_1 and 13_2 shown in FIG. 1 , or only to the normally closed contacts of the limit switches 13_1 and 13_2 shown in FIG. 1 . Take the normally closed contact of the limit switch 13_1 or/and 13_2 as an example, when the brake plate of the limit switch 13_1 or/and 13_2 is triggered, the normally open node of the limit switch 13_1 or/and 13_2 is turned on, and the connector H1 or/and H2 can output a voltage with a preset potential value to the AND gate AND, wherein the preset potential value is, for example, the difference between the limit switch supply voltage 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 can output an integrated signal indicating a high potential (HIGH) to the microcontroller 151. In addition, it should be particularly noted that the above-mentioned light-emitting diodes D1 to D4 are selectively arranged components.

Please refer to FIG. 1 and FIG. 3 , FIG. 3 is a schematic diagram of the arrangement relationship between the charging module and the limit switch of the wireless charging device according to an embodiment of the present invention. 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 shown in FIG. 1 can be the same as the arrangement relationship between the charging module 12 and the limit switch 13 shown in FIG. 3 .

As shown in FIG3 , 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 disposed on the substrate 122, and in particular, are disposed on two opposite sides of the substrate 122. Specifically, the short-distance wireless communication antenna 121 may be disposed on the substrate 122 along the setting direction z, and the projection on the setting direction z may not overlap the limit switch 13. The charging coil 123 may be disposed on the substrate 122 along the setting direction z, and the projection on the setting direction z may not overlap the limit switch 13. In this way, 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 that FIG. 3 merely exemplarily shows that the short-range wireless communication antenna 121 includes two coils and the charging coil 123 includes three sets of coils, and is not intended to limit the present invention.

Please refer to FIG. 1 and FIG. 4, wherein FIG. 4 is a control flow chart of a switch element of a wireless charging device according to an embodiment of the present invention. As shown in FIG. 4, the control flow includes step S11: initialization; step S12: determining whether a detection potential of one of the plurality of limit switches has a preset potential value; when the determination result of step S12 is "no", executing step S11 and the steps subsequent to step S11 again; when the determination result of step S12 is "yes", executing step S13: determining which of the plurality of limit switches has a detection potential of a preset potential value. The voltage has a preset potential value; when the judgment result of step S13 is the first condition C1, step S14 is executed: the short-distance wireless communication chip and the short-distance wireless communication antenna of the charging module set by the first limit switch are turned on; and when the judgment result of step S13 is the second condition C2, step S15 is executed: the short-distance wireless communication chip and the short-distance wireless communication antenna of the charging module set by the second limit switch are turned on. The above steps are applicable to the wireless charging device 1 shown in FIG. 1, and each step is specifically described below based on the operation of the wireless charging device 1.

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.

In step S13, the microcontroller 151 determines which of the limit switches 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. Furthermore, 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 values, the preset sequence may be to execute step S14 first and then execute step S15.

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

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 provided 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.

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

Please refer to FIG. 1 and FIG. 5 , FIG. 5 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, in addition to steps S11 to S15 of controlling the switch element shown in FIG. 4 , the control flow of the wireless charging device may further include step S16 as shown in FIG. 5 : obtaining the data to be identified from the turned-on short-distance wireless communication antenna through the short-distance wireless communication chip; step S17 : judging whether the data to be identified meets the preset charging standard; when the judgment result of step S17 is "yes", executing step S18 : controlling the turned-on short-distance wireless communication antenna The corresponding charging module outputs power; when the judgment result of step S17 is "no", execute step S20: send a notification message; step S19: determine whether the detection potential corresponding to the charging module that outputs power is converted from having a preset potential value to not having a preset potential value; when the judgment result of step S19 is "yes", execute step S12 and the steps subsequent to step S12; and when the judgment result of step S19 is "no", continue to execute step S18. The above steps are applicable to the wireless charging device 1 shown in Figure 1, and the following specifically describes each step based on the operation of the wireless charging device 1.

In step S16 , the microcontroller 151 obtains the data to be identified from the turned-on NFC antenna 121_1 and/or 121_2 via the NFC chip 11 . Specifically, after the short-distance wireless communication chip 11 is connected to 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 from the short-distance wireless communication antenna 121_1 and/or 121_2 wirelessly transmitted through the short-distance wireless communication chip 11.

In step S17, the microcontroller 151 determines whether the data to be identified meets the preset charging standard. Specifically, when the determination result of step S17 is that the data to be identified meets the preset charging standard, step S18 is executed. When the determination 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.

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 conductive short-range 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 or/and 12_2 outputting power, the microcontroller 151 can also execute a foreign object detection (FOD) program.

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 having a preset potential value to not having a preset potential value. Specifically, when the determination 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 having a preset potential value to not having a preset potential value, step S12 is executed, and when the determination 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 having a preset potential value to not having a preset potential value, step S18 is continued to be executed. Furthermore, when the determination result of step S19 is that the detection potential corresponding to the charging module 12_1 or/and 12_2 outputting power changes from having a preset potential value to not having a preset potential value, the charging controller 152 can control the charging module 12_1 or/and 12_2 outputting power to stop outputting power.

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

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

In one or more embodiments of the present invention, the wireless charging device of the present invention can be applied to a vehicle-mounted device, such as a self-driving car, an electric car, or a semi-autonomous car, etc.

With the above structure, the wireless charging device disclosed in this case can use multiple limit switches set in multiple charging modules to determine whether an object is 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. Thus, compared with a wireless charging device that uses multiple short-range wireless communication chips to connect the short-range wireless communication antennas included in 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 included in 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.

Although the present invention is disclosed as above with the aforementioned embodiments, it is not intended to limit the present invention. Any changes and modifications made without departing from the spirit and scope of the present invention 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.

1: Wireless charging device 11: Short-distance wireless communication chip 12,12_1,12_2: Charging module 13,13_1,13_2: Limit switch 14: Switching element 15: Control module 151: Microcontroller 152: Wireless charging controller 121,121_1,121_2: Short-distance wireless communication antenna 122: Substrate 123: Charging coil x,y,z: Direction S11,S12,S13,S14,S15,S16,S17,S18,S19,S20: Steps D1,D2,D3,D4: LED R1,R2,R3,R4: Resistors H1,H2: Connectors AND: AND gate T1, T2, T3, T4, T5: endpoints

FIG. 1 is a functional block diagram of a wireless charging device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a sensing signal integration circuit of a wireless charging device according to another embodiment of the present invention. FIG. 3 is a schematic diagram of the setting relationship between a charging module and a limit switch of a wireless charging device according to an embodiment of the present invention. FIG. 4 is a control flow chart of a switch element of a wireless charging device according to an embodiment of the present invention. FIG. 5 is a control flow chart of a charging module of a wireless charging device according to an embodiment of the present invention.

1: Wireless charging device

11: Short-range wireless communication chip

12_1,12_2: Charging module

13_1,13_2: Limit switch

14: Switching components

15: Control module

151:Microcontroller

152: Wireless charging controller

121_1,121_2: Short-range wireless communication antenna

Claims (10)

A wireless charging device comprises: a short-distance wireless communication chip; a plurality of charging modules, each comprising a short-distance wireless communication antenna; a plurality of limit switches, respectively disposed on the charging modules; a switch element, connected to the short-distance wireless communication chip and the charging modules; and a control module, connected to the short-distance wireless communication chip, the charging modules, the limit switches and the switch element, for controlling the switch element to conduct the short-distance wireless communication chip and the short-distance wireless communication antenna of a target module among the charging modules according to a detection potential of each of the limit switches. The wireless charging device as described in claim 1, wherein the control module is used to use one of the charging modules corresponding to the detection potential having a preset potential value as the target module. A wireless charging device as described in claim 1, wherein 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 the at least two limit switches, to the short-range wireless communication chip in sequence in a preset sequence when the detection potential 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. A wireless charging device as described in claim 1, wherein the control module is further used to obtain a data to be identified from the conductive short-range wireless communication antenna through the short-range wireless communication chip, determine whether the data to be identified meets a preset charging standard based on the data to be identified, and control the target module to output power when it is determined that the data to be identified meets the preset charging standard. The wireless charging device as described in claim 4 further comprises: an output element connected to the control module, wherein the control module is further used to send a notification message through the output element when it is determined that the data to be identified does not meet the preset charging standard. The wireless charging device as described in claim 4, wherein the control module is further used 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. A wireless charging device as described in claim 1, wherein each of the charging modules further comprises: a substrate; and a charging coil disposed on the substrate along a setting direction, and the projection on the setting direction does not overlap with the limit switches, wherein the short-range wireless communication antenna is disposed on the substrate. A wireless charging device as described in claim 1, wherein each of the charging modules further comprises: a substrate; and a charging coil disposed on the substrate, wherein the short-range wireless communication antenna is disposed on the substrate along a setting direction, and the projection in the setting direction does not overlap with the limit switches. A wireless charging device as described in claim 1, wherein each of the limit switches is a double-acting roller limit switch. A wireless charging device as described in claim 1, wherein the switch element is a radio frequency switch element.

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