Control method and device of wireless charging equipment, vehicle and storage medium

Abstract

The invention provides a control method and device of wireless charging equipment, a vehicle and a storage medium, and relates to the technical field of wireless charging. The method comprises the steps that when wireless charging equipment is started, if it is detected that to-be-charged equipment exists on the wireless charging equipment, the wireless charging equipment is controlled to send an electromagnetic signal to the to-be-charged equipment; determining a target distance between the wireless charging device and the to-be-charged device based on the electromagnetic signal; based on the target distance, determining whether a target foreign matter exists between the wireless charging device and the to-be-charged device; and if the target foreign matter exists between the wireless charging device and the to-be-charged device, controlling the wireless charging device not to charge the to-be-charged device. Based on the scheme, the foreign matter on the wireless charging equipment can be detected, and the wireless charging equipment is protected when the foreign matter on the wireless charging equipment is detected.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and in particular to a wireless charging foreign object detection method, device, wireless charging equipment and vehicle in the field of wireless charging technology. Background Art

[0002] Compared with wired charging devices, wireless charging devices have the advantages of being safer, more convenient, and more beautiful. The coil built into the wireless charging device (which can be called the "transmitting coil") can convert electrical energy into magnetic field energy and transmit it outward. The coil built into the device to be charged (for example, a smartphone) (which can be called the "receiving coil") receives the magnetic field energy and converts it into electrical energy, thereby wirelessly charging the device to be charged.

[0003] However, when there is a foreign object other than the device to be charged between the transmitting coil and the receiving coil, an eddy current effect is easily generated, causing the transmitting coil to be short-circuited, which may damage the diode of the wireless charging device, thereby causing the wireless charging function to fail, making it impossible for the device to be charged normally, affecting the normal use of the device to be charged.

[0004] Therefore, how to detect foreign objects on the wireless charging device to protect the wireless charging device is a problem that needs to be solved urgently. Summary of the invention

[0005] The present application provides a control method, device, vehicle and storage medium for a wireless charging device. The method can detect foreign objects on the wireless charging device and protect the wireless charging device when foreign objects are detected on the wireless charging device.

[0006] In a first aspect, the present application provides a control method for a wireless charging device, the method comprising:

[0007] When the wireless charging device is turned on, if it is detected that there is a device to be charged on the wireless charging device, the wireless charging device is controlled to send an electromagnetic signal to the device to be charged; based on the electromagnetic signal, the target distance between the wireless charging device and the device to be charged is determined; based on the target distance, it is determined whether there is a target foreign object between the wireless charging device and the device to be charged; if there is a target foreign object between the wireless charging device and the device to be charged, the wireless charging device is controlled not to charge the device to be charged.

[0008] In an embodiment of the present application, when the wireless charging device is turned on and there is a device to be charged, the distance between the wireless charging device and the device to be charged (i.e., the target distance) can be determined by the electromagnetic signal sent by the wireless charging device to the device to be charged, and then the target distance can be used to determine whether there is a foreign object between the wireless charging device and the device to be charged. When there is a foreign object between the wireless charging device and the device to be charged, the wireless charging device is controlled not to charge the device to be charged, thereby avoiding the problem of damage caused by the wireless charging device continuing to charge the device to be charged when there is a foreign object between the wireless charging device and the device to be charged. The wireless charging device can be protected, thereby ensuring the service life of the wireless charging device.

[0009] In combination with the first aspect, in certain implementations of the first aspect, determining whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance includes:

[0010] Determine whether the target distance is within a preset range; if the target distance is not within the preset range, determine that there is a target foreign object between the wireless charging device and the device to be charged; if the target distance is within the preset range, determine that there is no target foreign object between the wireless charging device and the device to be charged.

[0011] In the embodiment of the present application, when the distance between the wireless charging device and the device to be charged is within the preset range, it means that the distance between the wireless charging device and the device to be charged is relatively small and they fit each other, and it can be determined that there is no target foreign object between the wireless charging device and the device to be charged. When the target distance is not within the preset range, it means that the distance between the wireless charging device and the device to be charged is large and they do not fit each other, and it can be determined that there is a target foreign object between the wireless charging device and the device to be charged. By determining whether the distance between the wireless charging device and the device to be charged is within the preset range and determining whether there is a target foreign object between the wireless charging device and the device to be charged, the accuracy of the result of determining whether there is a target foreign object between the wireless charging device and the device to be charged can be improved, thereby further protecting the wireless charging device.

[0012] In combination with the first aspect and the foregoing implementations, in some implementations of the first aspect, the method further includes:

[0013] Obtaining the current value, quality factor, power loss and / or temperature value of the wireless charging device; if the target distance is not within the preset range, determining that there is a target foreign object between the wireless charging device and the device to be charged, including: if the target distance is not within the preset range, and the current value is greater than or equal to the preset current value, and / or the quality factor is less than the preset quality factor value, and / or the power loss is greater than or equal to the preset power loss value, and / or the temperature value is greater than or equal to the preset temperature value, determining that there is a target foreign object between the wireless charging device and the device to be charged.

[0014] In the embodiment of the present application, based on the distance between the wireless charging device and the device to be charged, the current value, quality factor, power loss and / or temperature value of the wireless charging device can be combined to jointly determine whether there is a target foreign object between the wireless charging device and the device to be charged. By combining multiple parameters, the accuracy of the result of judging whether there is a target foreign object between the wireless charging device and the device to be charged can be improved, thereby further protecting the wireless charging device.

[0015] In combination with the first aspect and the above implementations, in some implementations of the first aspect, determining the target distance between the wireless charging device and the device to be charged based on the electromagnetic signal includes:

[0016] A reflection signal corresponding to the electromagnetic signal received by the wireless charging device is obtained; wherein the reflection signal is used to represent the signal reflected when the electromagnetic signal reaches the device to be charged; based on the reflection signal and the electromagnetic signal, the target distance between the wireless charging device and the device to be charged is obtained.

[0017] In an embodiment of the present application, after the wireless charging device sends an electromagnetic signal to the device to be charged, a signal reflected when the electromagnetic signal reaches the device to be charged (i.e., a reflected signal) can be obtained, and then the reflected signal and the electromagnetic signal are combined to jointly determine the distance between the wireless charging device and the device to be charged, thereby improving the accuracy of the determined distance between the wireless charging device and the device to be charged, thereby further protecting the wireless charging device.

[0018] In combination with the first aspect and the above implementations, in some implementations of the first aspect, obtaining the target distance between the wireless charging device and the device to be charged based on the reflected signal and the electromagnetic signal includes:

[0019] Obtain the sending time of the electromagnetic signal and the receiving time of the reflected signal; determine the time difference based on the sending time and the receiving time; determine the target distance based on the time difference and the preset transmission speed.

[0020] In an embodiment of the present application, when the distance between the wireless charging device and the device to be charged is determined jointly by the reflected signal and the electromagnetic signal, the time difference between the reflected signal and the electromagnetic signal is taken into account, and a preset transmission speed is introduced. The distance between the wireless charging device and the device to be charged is then determined by the time difference and the preset transmission speed, thereby improving the accuracy of the determined distance between the wireless charging device and the device to be charged, thereby further protecting the wireless charging device.

[0021] In combination with the first aspect and the above implementations, in some implementations of the first aspect, determining the target distance based on the time difference and the preset transmission speed includes:

[0022] The product of the time difference and the preset transmission speed is determined; and the quotient of the product and the preset coefficient is determined as the target distance.

[0023] In combination with the first aspect and the above implementations, in some implementations of the first aspect, if there is a target foreign object between the wireless charging device and the device to be charged, the method further includes:

[0024] Output prompt information; wherein the prompt information is used to indicate that there is a target foreign object between the wireless charging device and the device to be charged.

[0025] In an embodiment of the present application, when there is a foreign object between the wireless charging device and the device to be charged, a prompt message indicating that there is a foreign object between the wireless charging device and the device to be charged can be output to remind the user so that the user can remove the foreign object on the wireless charging device in time to prevent the foreign object from damaging the wireless charging device, thereby further protecting the wireless charging device.

[0026] In a second aspect, the present application provides a control device for a wireless charging device, the device comprising:

[0027] The control module is used to control the wireless charging device to send an electromagnetic signal to the device to be charged if it is detected that there is a device to be charged on the wireless charging device when the wireless charging device is turned on;

[0028] A first determination module, configured to determine a target distance between the wireless charging device and the device to be charged based on the electromagnetic signal;

[0029] A second determination module is used to determine whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance;

[0030] The processing module is used to control the wireless charging device not to charge the device to be charged if there is a target foreign object between the wireless charging device and the device to be charged.

[0031] In a third aspect, the present application provides a vehicle, comprising a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, so that the vehicle executes the method in the first aspect or any possible implementation of the first aspect.

[0032] In a fourth aspect, the present application provides a wireless charging device, comprising a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, so that the wireless charging device executes the method in the first aspect or any possible implementation of the first aspect.

[0033] In a fifth aspect, the present application provides a computer program product, which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0034] In a sixth aspect, the present application provides a computer-readable storage medium storing a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a wireless charging scenario in related technology.

[0036] Figure 2 It is a flow chart of a control method of a wireless charging device provided in an embodiment of the present application.

[0037] Figure 3 It is a flow chart of another control method of a wireless charging device provided in an embodiment of the present application.

[0038] Figure 4 It is a schematic diagram of the principle of Q value detection of the wireless charging device provided in an embodiment of the present application.

[0039] Figure 5 It is a schematic diagram of the principle of charging power loss provided in an embodiment of the present application.

[0040] Figure 6 It is a structural schematic diagram of a control device for a wireless charging device provided in an embodiment of the present application.

[0041] Figure 7 It is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The technical solution in the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0044] Figure 1 It is a schematic diagram of a wireless charging scenario in related technology.

[0045] For example, Figure 1 As shown, Figure 1 The wireless charging device 110, foreign objects 120 (FOD) and an electronic device 130 are included. The foreign objects 120 are located between the wireless charging device 110 and the electronic device 130.

[0046] For example, the wireless charging device 110 has advantages over wired charging devices such as greater safety, convenience, and aesthetics. The transmitting coil in the wireless charging device 110 can convert electrical energy into magnetic field energy and transmit it outward, and the receiving coil in the electronic device 130 receives the magnetic field energy and converts it into electrical energy, thereby wirelessly charging the electronic device 130 through the wireless charging device 110.

[0047] Reference Figure 1 When there is a foreign object 120 between the wireless charging device 110 and the electronic device 130, the electronic device 130 and the wireless charging device 110 cannot be completely fitted together, and a gap exists, which increases the power loss of the wireless charging device 110 when wirelessly charging the electronic device 130, or fails to charge the electronic device 130 normally.

[0048] In addition, when there is a foreign object 120 between the wireless charging device 110 and the electronic device 130, an eddy current effect is easily generated, causing the transmitting coil in the wireless charging device 110 to be short-circuited, causing damage to the diode of the wireless charging device 110, thereby causing the wireless charging function to fail, and the electronic device 130 cannot be charged normally, affecting the normal use of the electronic device 130.

[0049] Optionally, the material of the foreign object 120 may be one or more of metal materials, polymer materials, ceramics, wood, etc. For example, coins, paper clips, keys, aluminum foil.

[0050] Optionally, the wireless charging device 110 can be mounted on vehicles, airplanes, high-speed trains, tables and chairs, and other devices that require wireless charging capabilities.

[0051] The wireless charging device 110 can control its own opening, closing, and foreign object detection through a vehicle control unit (VCU) in a third party (e.g., a vehicle), or can control its own opening, closing, and foreign object detection through a control unit configured by the wireless charging device 110, which is not limited in the present embodiment. For ease of explanation, the present embodiment uses the VCU in the vehicle to control the opening, closing, and foreign object detection of the wireless charging device 110.

[0052] It should be noted that the electronic device may be a smart device with a wireless charging function, including but not limited to: a personal computer, a tablet computer, a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, etc. Electronic devices may be called different names in different networks, such as: user equipment, access electronic device, user unit, user station, mobile station, mobile station, remote station, remote electronic device, mobile device, user electronic device, electronic device, wireless communication device, user agent or user device, cellular phone, cordless phone, 5G network or electronic device in future evolution network, etc., and the embodiments of the present application are not limited by comparison.

[0053] In order to detect foreign objects on a wireless charging device and protect the wireless charging device, the present application proposes a control method, device, vehicle and storage medium for a wireless charging device.

[0054] Combine the following Figures 2 to 3 The control method of the wireless charging device provided in the embodiment of the present application is described in detail.

[0055] Figure 2 1 is a flow chart of a control method for a wireless charging device provided in an embodiment of the present application. The method can be executed by a VCU in a vehicle.

[0056] For example, Figure 2 As shown, the method 200 includes the following implementation process:

[0057] S210, when the wireless charging device is turned on, if it is detected that there is a device to be charged on the wireless charging device, the wireless charging device is controlled to send an electromagnetic signal to the device to be charged.

[0058] For example, in order to avoid the presence of foreign objects between the wireless charging device and the device to be charged (i.e., the above-mentioned electronic device, for example, a smart phone), which may affect the normal charging of the device to be charged by the wireless charging device, and cause damage to the wireless charging device, the current status of the wireless charging device can be obtained in real time, and whether the wireless charging device is turned on can be determined based on the current status of the wireless charging device.

[0059] Furthermore, when it is determined that the wireless charging device is turned on, it can be detected whether there is a device to be charged on the charging side of the wireless charging device. If it is detected that there is a device to be charged on the charging side of the wireless charging device, an electromagnetic signal can be sent to the device to be charged through the transmitting coil in the wireless charging device.

[0060] The charging side of the wireless charging device refers to the side that can charge the device to be charged. Figure 1 The 111 surface can charge the device to be charged, while the 112 surface cannot charge the device to be charged. Therefore, the 111 surface is the charging side of the wireless charging device, and the 112 surface is the non-charging side of the wireless charging device.

[0061] Optionally, the resistance change of the wireless charging device can be detected, and when the resistance of the wireless charging device is less than or equal to a preset resistance, it can be determined that there is a device to be charged on the wireless charging device. The preset resistance can be pre-calibrated, for example, 10Ω, 15Ω, etc., which is not limited in the embodiment of the present application.

[0062] For example, when the resistance of the wireless charging device is 30Ω>10Ω, it means that the object is not a device to be charged, and the wireless charging device can be controlled to directly switch from on to off, thereby preventing the object from damaging the wireless charging device.

[0063] Exemplarily, when the load of the wireless charging device is 8Ω<10Ω, it indicates that the object is a device to be charged, and an electromagnetic signal can be sent to the device to be charged through the transmitting coil in the wireless charging device.

[0064] Optionally, the electromagnetic signal sent by the wireless charging device to the device to be charged may be a signal sent by an antenna installed in the wireless charging device.

[0065] Optionally, when it is determined that the wireless charging device is turned off, the transmitting coil in the wireless charging device will not output electrical energy. Even if there are foreign objects on the wireless charging device, the wireless charging device will not be damaged. The current state of the wireless charging device can be continuously detected until it is detected that the wireless charging device is switched from off to on.

[0066] It should be noted that the presence of a device to be charged on the wireless charging device may also be determined by detecting changes in the inductance, magnetic field, load, etc. of the wireless charging device, which is not limited in this embodiment of the present application.

[0067] S220, determining a target distance between the wireless charging device and the device to be charged based on the electromagnetic signal.

[0068] For example, when an electromagnetic signal is sent to a device to be charged through a transmitting coil in a wireless charging device, the actual distance (which may be referred to as a “target distance”) between the wireless charging device and the device to be charged may be determined through the electromagnetic signal.

[0069] In a possible implementation, the above-mentioned determining the target distance between the wireless charging device and the device to be charged based on the electromagnetic signal includes: obtaining a reflection signal corresponding to the electromagnetic signal received by the wireless charging device; wherein the reflection signal is used to represent a signal reflected when the electromagnetic signal reaches the device to be charged; based on the reflection signal and the electromagnetic signal, obtaining the target distance between the wireless charging device and the device to be charged.

[0070] Exemplarily, when the electromagnetic signal sent by the transmitting coil reaches the device to be charged, the device to be charged will reflect the electromagnetic signal to the wireless charging device, generating a reflected electromagnetic signal (which may be referred to as a “reflected signal”).

[0071] When it is detected that the wireless charging device receives a reflected signal reflected by the device to be charged, the target distance between the wireless charging device and the device to be charged can be determined by the electromagnetic signal and the reflected signal.

[0072] In an embodiment of the present application, after the wireless charging device sends an electromagnetic signal to the device to be charged, a signal reflected when the electromagnetic signal reaches the device to be charged (i.e., a reflected signal) can be obtained, and then the reflected signal and the electromagnetic signal are combined to jointly determine the distance between the wireless charging device and the device to be charged, thereby improving the accuracy of the determined distance between the wireless charging device and the device to be charged, thereby further protecting the wireless charging device.

[0073] Optionally, the target distance between the wireless charging device and the device to be charged is obtained based on the reflected signal and the electromagnetic signal, including: obtaining the sending time of the electromagnetic signal and the receiving time of the reflected signal; determining the time difference based on the sending time and the receiving time; and determining the target distance based on the time difference and a preset transmission speed.

[0074] The preset transmission speed represents the transmission speed of the electromagnetic signal or the transmission speed of the reflected signal. Also, since the reflected signal is also an electromagnetic signal, but the transmission direction is opposite to that of the electromagnetic signal sent by the wireless charging device, the transmission speed of the electromagnetic signal = the transmission speed of the reflected signal.

[0075] Exemplarily, when the target distance between the wireless charging device and the device to be charged is determined by the electromagnetic signal and the reflected signal, the sending time of the wireless charging device sending the electromagnetic signal and the receiving time of the wireless charging device receiving the reflected signal can be obtained first. And the time difference between the sending time and the receiving time is determined. For example, the sending time is 10:00 and the receiving time is 10:01, then the time difference = receiving time - sending time = 10:01-10:00 = 00:01. It should be understood that the receiving time is generally later than the sending time.

[0076] Furthermore, the target distance between the wireless charging device and the device to be charged is determined by the time difference between the sending time and the receiving time, as well as the transmission speed of the electromagnetic signal.

[0077] In an embodiment of the present application, when the distance between the wireless charging device and the device to be charged is determined jointly by the reflected signal and the electromagnetic signal, the time difference between the reflected signal and the electromagnetic signal is taken into account, and a preset transmission speed is introduced. The distance between the wireless charging device and the device to be charged is then determined by the time difference and the preset transmission speed, thereby improving the accuracy of the determined distance between the wireless charging device and the device to be charged, thereby further protecting the wireless charging device.

[0078] Optionally, determining the target distance based on the time difference and the preset transmission speed includes: determining the product of the time difference and the preset transmission speed; and determining the quotient of the product and a preset coefficient as the target distance.

[0079] The preset coefficient is used to represent twice the number of times the wireless charging device sends the electromagnetic signal. When the wireless charging device sends the electromagnetic signal and receives the reflected signal corresponding to the electromagnetic signal, it experiences the same path twice.

[0080] For example, the number of times the wireless charging device sends an electromagnetic signal is 1, and the number of times the wireless charging device receives a reflected signal is also 1, and the preset coefficient=2×the number of times the electromagnetic signal is sent=2×1=2.

[0081] For another example, the wireless charging device sends electromagnetic signals twice, and the wireless charging device receives reflected signals twice. The preset coefficient=2×the number of electromagnetic signals=2×2=4.

[0082] For example, when calculating the target distance between the wireless charging device and the device to be charged, the product of the time difference and the preset transmission speed can be calculated first, and then the quotient of the product and the preset coefficient is calculated, and the quotient is determined as the target distance between the wireless charging device and the device to be charged.

[0083] Assume that the preset coefficient is 2, then

[0084] S230: Determine whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance.

[0085] For example, when the target distance between the wireless charging device and the device to be charged is calculated, the target distance can be used to determine whether there is a foreign object other than the device to be charged between the wireless charging device and the device to be charged (i.e., the foreign object 130 mentioned above, which can be referred to as a "target foreign object").

[0086] In a possible implementation, the above-mentioned determining whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance includes: judging whether the target distance is within a preset range; if the target distance is not within the preset range, determining that there is a target foreign object between the wireless charging device and the device to be charged; if the target distance is within the preset range, determining that there is no target foreign object between the wireless charging device and the device to be charged.

[0087] For example, it can be determined whether the target distance between the wireless charging device and the device to be charged is within a preset range. When the target distance is within the preset range, it means that the distance between the wireless charging device and the device to be charged is relatively small and they fit each other, and it can be determined that there is no target foreign object between the wireless charging device and the device to be charged.

[0088] Alternatively, when the target distance is not within the preset range, that is, greater than the upper limit value of the preset range, it means that the distance between the wireless charging device and the device to be charged is large and they are not in contact with each other. It can be determined that there is a target foreign object between the wireless charging device and the device to be charged.

[0089] The preset range may be pre-set, for example, 0-5 mm, or 0-4.5 mm, and this embodiment of the present application does not limit this.

[0090] For example, the preset range is 0-5mm. When the target distance is 3mm, if it is within 0-5mm, it means that there is no target foreign object between the wireless charging device and the device to be charged.

[0091] For another example, the preset range is 0-5mm. When the target distance is 7mm, if it is greater than 5mm, that is, exceeds 0-5mm, it means that there is a target foreign object between the wireless charging device and the device to be charged.

[0092] In the embodiment of the present application, when the distance between the wireless charging device and the device to be charged is within the preset range, it means that the distance between the wireless charging device and the device to be charged is relatively small and they fit each other, and it can be determined that there is no target foreign object between the wireless charging device and the device to be charged. When the target distance is not within the preset range, it means that the distance between the wireless charging device and the device to be charged is large and they do not fit each other, and it can be determined that there is a target foreign object between the wireless charging device and the device to be charged. By determining whether the distance between the wireless charging device and the device to be charged is within the preset range and determining whether there is a target foreign object between the wireless charging device and the device to be charged, the accuracy of the result of determining whether there is a target foreign object between the wireless charging device and the device to be charged can be improved, thereby further protecting the wireless charging device.

[0093] S240: If there is a target foreign object between the wireless charging device and the device to be charged, control the wireless charging device not to charge the device to be charged.

[0094] For example, when a target foreign object is detected between the wireless charging device and the device to be charged, in order to protect the wireless charging device, the wireless charging device can be controlled not to charge the device to be charged. For example, the wireless charging device is switched from on to off.

[0095] Optionally, when it is detected that there is no target foreign object between the wireless charging device and the device to be charged, the wireless charging device may be kept turned on so as to charge the device to be charged normally through the wireless charging device.

[0096] In such Figure 2 In the method 200 shown, when the wireless charging device is turned on and there is a device to be charged, the distance between the wireless charging device and the device to be charged (i.e., the target distance) can be determined by the electromagnetic signal sent by the wireless charging device to the device to be charged, and then the target distance can be used to determine whether there is a foreign object between the wireless charging device and the device to be charged. When there is a foreign object between the wireless charging device and the device to be charged, the wireless charging device is controlled not to charge the device to be charged, thereby avoiding the problem of damage caused by the wireless charging device continuing to charge the device to be charged when there is a foreign object between the wireless charging device and the device to be charged. The wireless charging device can be protected, thereby ensuring the service life of the wireless charging device.

[0097] Optionally, if there is a target foreign object between the wireless charging device and the device to be charged, a prompt message may be output; wherein the prompt message is used to indicate that there is a target foreign object between the wireless charging device and the device to be charged.

[0098] Exemplarily, when the presence of a target foreign object is detected between the wireless charging device and the device to be charged, in addition to controlling the wireless charging device not to charge the device to be charged, a prompt message that there is a target foreign object between the wireless charging device and the device to be charged can also be output to remind the user so that the user can remove the foreign object on the wireless charging device in time to prevent the foreign object from damaging the wireless charging device.

[0099] Optionally, the prompting method of the prompting information may be one or more of voice prompting, text prompting and image prompting.

[0100] For example, a text prompt "There is a key fob between the wireless charging device and the device to be charged" is displayed on a display screen in a head unit (HUT) in the vehicle.

[0101] In an embodiment of the present application, when there is a foreign object between the wireless charging device and the device to be charged, a prompt message indicating that there is a foreign object between the wireless charging device and the device to be charged can be output to remind the user so that the user can remove the foreign object on the wireless charging device in time to prevent the foreign object from damaging the wireless charging device, thereby further protecting the wireless charging device.

[0102] Figure 3 It is a flow chart of another control method of a wireless charging device provided in an embodiment of the present application.

[0103] For example, Figure 3 As shown, the method 300 includes the following implementation process:

[0104] S301, determine whether the wireless charging device is turned on? If yes, execute S302; if no, execute S301.

[0105] Exemplarily, when the current state of the wireless charging device is acquired, it can be determined whether the wireless charging device is turned on according to the current state of the wireless charging device.

[0106] S302, determine whether there is a mobile phone on the wireless charging device? If so, execute S303, S306, S308, S310 and / or S312; if not, execute S302.

[0107] Exemplarily, if it is obtained through S301 that the wireless charging device is turned on, it can be determined whether the wireless charging device is in the PING stage. When the wireless charging device is in the PING stage, it can continue to be determined whether there is a mobile phone on the wireless charging device.

[0108] Among them, the PING stage refers to the stage in which the wireless charging device continuously sends a test signal (i.e., a PING request) to detect whether a mobile phone is placed on the charging side.

[0109] For example, if it is determined through S301 that the wireless charging device is turned off, S301 may be continued to be executed to determine whether the wireless charging device is turned on.

[0110] S303, controlling the wireless charging device to send an electromagnetic signal to the mobile phone; and receiving a reflected signal which is reflected back to the wireless charging device after the electromagnetic signal reaches the mobile phone.

[0111] For example, if it is determined through S302 that there is a mobile phone on the charging side of the wireless charging device, an electromagnetic signal can be sent to the mobile phone through the transmitting coil in the wireless charging device, and the wireless charging device can be controlled to receive the electromagnetic signal and then reflect the reflected signal back to the wireless charging device after it reaches the mobile phone.

[0112] S304, calculating the time difference between the sending time of the electromagnetic signal and the receiving time of the reflected signal, multiplying the time difference by the transmission speed of the electromagnetic signal and then dividing by 2 to obtain the actual distance between the wireless charging device and the mobile phone.

[0113] For example, when the wireless charging device receives the reflected signal, the sending time of the electromagnetic signal sent by the wireless charging device and the receiving time of the reflected signal received by the wireless charging device can be obtained first, and the time difference between the sending time and the receiving time can be determined, and the transmission speed of the electromagnetic signal can be obtained.

[0114] Furthermore, the time difference is multiplied by the transmission speed of the electromagnetic signal and then divided by 2 to obtain the actual distance between the wireless charging device and the mobile phone (i.e., the above-mentioned target distance), that is,

[0115] S305, determine whether the actual distance is between 0-5 mm?

[0116] For example, when the actual distance between the wireless charging device and the mobile phone is calculated, it can be determined whether the actual distance is within a range of 0-5 mm.

[0117] S306, obtaining a current value of a transmitting coil in the wireless charging device.

[0118] For example, if it is determined through S302 that there is a mobile phone on the charging side of the wireless charging device, the current value of the transmitting coil in the wireless charging device can be obtained, and the current value can be used to detect whether there is a foreign object between the wireless charging device and the mobile phone.

[0119] S307, determine whether the current value is ≥ the preset current value?

[0120] Exemplarily, when the current value of the transmitting coil is obtained, it can be determined whether the current value is greater than or equal to a preset current value.

[0121] Among them, the preset current value can be pre-set, or it can be obtained by the wireless charging device through self-calibration through environmental parameters (for example, humidity, temperature, pressure, etc.), and the embodiment of the present application is not limited to this.

[0122] S308, obtaining a Q value (Quality Factor) of a transmitting coil in the wireless charging device.

[0123] For example, if it is determined through S302 that there is a mobile phone on the charging side of the wireless charging device, the Q value of the transmitting coil in the wireless charging device can be obtained, and the Q value can be used to detect whether there is a foreign object between the wireless charging device and the mobile phone.

[0124] S309, determine whether the Q value is less than the preset Q value?

[0125] Exemplarily, when the Q value of the transmitting coil is obtained, during the negotiation protection phase of the wireless charging device, it can be determined whether the Q value is less than a preset Q value.

[0126] Optionally, "judgment Q value < preset Q value?" can be expressed by program code. For example, Q mea _Coiln <Open_Fod_Coiln?

[0127] Among them, the preset Q value can be pre-set, or it can be obtained by the wireless charging device through self-calibration through environmental parameters (for example, humidity, temperature, pressure, etc.), and the embodiments of the present application are not limited to this.

[0128] Figure 4 It is a schematic diagram of the principle of Q value detection of the wireless charging device provided in an embodiment of the present application.

[0129] For example, Figure 4 As shown, Figure 4 The figure includes the Q values ​​of wireless charging devices in five different situations: Group A, Group B, Group C, Group D and Group E.

[0130] Group A represents the reference quality factor value. The wireless charging device is not affected by any external factors. Under ideal conditions, the Q value of the wireless charging device is 1.

[0131] Group B indicates that the wireless charging device has a Q value of 2, taking into account the uncertainty of the wireless charging device due to production and measurement, so that the wireless charging device can meet the charging needs of the mobile phone. That is, Set Q_threshold set at least 10% below the Reference Quality Factor value. Among them, Q value 2 is 10% less than Q value 1, that is, Q value 2 = 90% Q value 1.

[0132] Group C represents the Q value of the wireless charging device after accounting for the production tolerance and measurement error of the wireless charging device. The Q value of 3 is close to the preset Q value (i.e., F), and can still meet the charging needs of the mobile phone. That is, Account for production and measurement tolerance. Among them, Q value 3 < Q value 2.

[0133] Group D indicates that when there is no foreign object on the wireless charging device (which can be recorded as "Q_measured (without FOnearby)"), the actual measured Q value is 4. Among them, the Q value 4 is greater than the preset Q value, indicating that when the wireless charging device charges the mobile phone normally, it can meet the charging needs of the mobile phone.

[0134] Group E indicates that when there is a foreign object in the wireless charging device (which can be recorded as "Q_measured (with FO nearby)"), the actual measured Q value is 5. Among them, the Q value of 5 is much smaller than the preset Q value, indicating that the presence of foreign objects has a negative impact on the Q value of the wireless charging device.

[0135] S310: Obtain power loss of the wireless charging device.

[0136] For example, if it is determined through S302 that there is a mobile phone on the charging side of the wireless charging device, the power loss of the wireless charging device can be obtained, and the power loss can be used to detect whether there is a foreign object between the wireless charging device and the mobile phone.

[0137] Figure 5 It is a schematic diagram of the principle of charging power loss provided in an embodiment of the present application.

[0138] For example, Figure 5 As shown, Figure 5 The wireless charging device includes a resonant circuit 510 of a transmitting coil in a wireless charging device, a resonant circuit 520 of a receiving coil in a mobile phone, and a foreign object 530.

[0139] The resonant circuit 510 (Power Transmitter, PT) can form and transmit an electromagnetic signal to transmit the electromagnetic signal to the resonant circuit 520, and the resonant circuit 510 is composed of a capacitor 512 (which can be recorded as “C p ”) and coil 513 (which can be denoted as “L p ”). The resonant circuit 520 (Power Receiver, PR) can receive the electromagnetic signal from the PT and convert the electromagnetic signal into electrical energy to charge the mobile phone, and the resonant circuit 520 is composed of a capacitor 515 (which can be recorded as “C s ”), coil 516 (which can be denoted as “L s”) capacitor 517 (which can be denoted as “C d ”), resistor 518 (which can be recorded as “R c ”), a filter capacitor 519 (which can be recorded as “C”), and a rectifier bridge 521.

[0140] Foreign matter 530 represents foreign matter that may appear on the wireless energy transmission path, which may affect the efficiency of energy transmission and cause additional power loss.

[0141] Power 511 (Input Power, P in ) represents the input power of the resonant circuit 510.

[0142] Path 514 represents the wireless energy transmission path of the electromagnetic signal transmitted from the resonant circuit 510 to the resonant circuit 520, and the G end of path 514 represents the actual power sent from the PT (which can be recorded as “P PT ”). Among them, P PT The power 511 and the power loss of the PT itself during the transmission of electromagnetic signals (which can be recorded as "P PTloss ”) is obtained by subtracting, that is, P PT =P in -P PTloss And, the F end of the path 515 represents the effective power received by the PR (which can be recorded as “P PR ”).

[0143] Power 522 (Output Power, P out ) represents the output power of the resonant circuit 520, that is, the power used to charge the mobile phone. out Through P PR The power loss of PR itself in the process of transmitting electromagnetic signals (which can be recorded as "P PRloss ”) is subtracted to obtain P out =P PR -P PRloss .

[0144] When there is a foreign object 530 on the wireless energy transmission path, it may cause P PT With P PR There is also power loss (which can be recorded as "P loss ”), P PR =P PT -P loss .

[0145] Channel 523 represents the two-way communication function between PT and PR, which can be used to monitor and adjust system performance, or detect foreign objects 530.

[0146] For example, P inAs the input power of the resonant circuit 510, P is emitted after passing through the resonant circuit 510. PT , P PT After passing through the path 514, PR is input to the resonant circuit 520, and after passing through the resonant circuit 520, PR outputs P out In this process, P in Coexistence in P PTloss , P PRloss With P loss The third power loss has a negative impact on charging performance. out =P in -P PTloss- P PRloss -P loss .

[0147] S311, determine whether the power loss is greater than or equal to the preset power loss?

[0148] Exemplarily, when the power loss of the wireless charging device is obtained, it can be determined whether the power loss is greater than or equal to a preset power loss.

[0149] Optionally, “determine whether the power loss is greater than or equal to the preset power loss?” can be expressed by program coding. loss >Fod_Loss_Threshol?

[0150] Among them, the preset power loss can be pre-set, or it can be obtained by the wireless charging device through self-calibration through environmental parameters (for example, humidity, temperature, pressure, etc.), and the embodiments of the present application are not limited to this.

[0151] S312: Obtain a temperature value of a transmitting coil in the wireless charging device.

[0152] For example, if it is determined through S302 that there is a mobile phone on the charging side of the wireless charging device, the temperature value of the transmitting coil in the wireless charging device can be obtained, and the temperature value can be used to detect whether there is a foreign object between the wireless charging device and the mobile phone.

[0153] S313, determine whether the temperature value is ≥ the preset temperature value?

[0154] For example, when there is a metal foreign object on the wireless charging device, the metal foreign object will be heated to generate a high temperature at the transmitting coil in the working state, which is significantly higher than the temperature at the adjacent coil. Therefore, a temperature sensor can be installed at the transmitting coil to detect the temperature of the transmitting coil. When the temperature value of the transmitting coil is obtained, it can be determined whether the temperature value is greater than or equal to the preset temperature value.

[0155] Among them, the preset temperature value can be pre-set, or it can be obtained by the wireless charging device through self-calibration of environmental parameters (for example, humidity, temperature, pressure, etc.), and the embodiment of the present application is not limited to this.

[0156] S314, determining that there is a foreign object between the wireless charging device and the mobile phone, and controlling the wireless charging device not to charge the mobile phone.

[0157] For example, if the actual distance between the wireless charging device and the mobile phone is greater than 5 mm through S305, and / or the current value of the transmitting coil is greater than or equal to the preset current value through S307, and / or the Q value of the transmitting coil is less than the preset Q value through S309, and / or the power loss of the wireless charging device is greater than or equal to the preset power loss through S311, and / or the temperature value of the transmitting coil is greater than or equal to the preset temperature value, it can be determined that there is a foreign object between the wireless charging device and the mobile phone. In order to protect the wireless charging device, the wireless charging device is prohibited from pairing with the mobile phone, and the wireless charging device is controlled not to charge the mobile phone.

[0158] Among them, when there is a foreign object between the wireless charging device and the mobile phone, the foreign object will cause the current value of the transmitting coil to increase, so that the current value of the transmitting coil is ≥ the preset current value. And the foreign object will reduce the Q value of the transmitting coil, so that the Q value of the transmitting coil is less than the preset Q value. And the foreign object will increase the power loss of the wireless charging device, so that the power loss of the wireless charging device is ≥ the preset power loss. And the foreign object will increase the temperature of the transmitting coil, so that the temperature value of the transmitting coil is ≥ the preset temperature value.

[0159] Exemplarily, some parameters of foreign matter can be listed in Table 1, as shown in Table 1.

[0160] Table 1

[0161]

[0162] As shown in Table 1, foreign body 1 is in the shape of a disc, made of steel, with a diameter of 15 mm, a thickness of 1 mm, and a heat-resistant temperature of up to 60°C. Foreign body 2 is in the shape of a ring, made of aluminum alloy, with an inner diameter of 20 mm, an outer diameter of 22 mm, a thickness of 1 mm, and a heat-resistant temperature of up to 80°C. Foreign body 3 is in the shape of a foil, made of aluminum foil, with a diameter of 20 mm, a thickness of 0.1 mm, and a heat-resistant temperature of up to 80°C. Foreign body 4 is in the shape of a disc, made of aluminum alloy, with a diameter of 22 mm, a thickness of 1 mm, and a heat-resistant temperature of up to 60°C, and so on. It should be understood that the data in Table 1 are only exemplary and are not limited to this in the embodiments of the present application.

[0163] In the embodiment of the present application, based on the distance between the wireless charging device and the device to be charged, the current value, quality factor, power loss and / or temperature value of the wireless charging device can be combined to jointly determine whether there is a target foreign object between the wireless charging device and the device to be charged. By combining multiple parameters, the accuracy of the result of judging whether there is a target foreign object between the wireless charging device and the device to be charged can be improved, thereby further protecting the wireless charging device.

[0164] S315, outputting a prompt message that there is a foreign object between the wireless charging device and the mobile phone on the HUT.

[0165] Exemplarily, if the actual distance between the wireless charging device and the mobile phone is greater than 5 mm obtained through S305, and / or the current value of the transmitting coil is greater than or equal to the preset current value obtained through S307, and / or the Q value of the transmitting coil is less than the preset Q value obtained through S309, and / or the power loss of the wireless charging device is greater than or equal to the preset power loss obtained through S311, and / or the temperature value of the transmitting coil is greater than or equal to the preset temperature value, it can be determined that there is a foreign object between the wireless charging device and the mobile phone. In order to remind the user, a prompt message that there is a foreign object between the wireless charging device and the mobile phone can also be output on the HUT of the vehicle.

[0166] S316, determining that there is no foreign object between the wireless charging device and the mobile phone, and controlling the wireless charging device to charge the mobile phone.

[0167] Exemplarily, if the actual distance between the wireless charging device and the mobile phone is within 0-5mm through S305, and the current value of the transmitting coil is less than the preset current value through S307, and the Q value of the transmitting coil is greater than or equal to the preset Q value through S309, and the power loss of the wireless charging device is less than the preset power loss through S311, and the temperature value of the transmitting coil is less than the preset temperature value, it can be determined that there is no foreign matter between the wireless charging device and the mobile phone, the wireless charging device can be kept turned on, and the wireless charging device can be controlled to pair with the mobile phone. After the pairing is successful, the mobile phone can be charged normally through the wireless charging device.

[0168] It should be noted that Figure 3 All steps in Figure 2 The corresponding embodiments are described in detail in the embodiment, which will not be repeated here.

[0169] It should be understood that the above examples are intended to help those skilled in the art understand the embodiments of the present application, rather than to limit the embodiments of the present application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the above examples, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0170] Combination of the above Figures 1 to 5 The control method of the wireless charging device provided in the embodiment of the present application is described in detail; Figure 6 and Figure 7 The device embodiments of the present application are described in detail. It should be understood that the device in the embodiments of the present application can execute the various methods of the aforementioned embodiments of the present application, that is, the specific working processes of the following various products can refer to the corresponding processes in the aforementioned method embodiments.

[0171] Figure 6 It is a structural schematic diagram of a control device for a wireless charging device provided in an embodiment of the present application.

[0172] For example, Figure 6 As shown, the device 600 includes:

[0173] The control module 610 is used to control the wireless charging device to send an electromagnetic signal to the device to be charged if it is detected that there is a device to be charged on the wireless charging device when the wireless charging device is turned on;

[0174] A first determination module 620, configured to determine a target distance between the wireless charging device and the device to be charged based on the electromagnetic signal;

[0175] A second determination module 630 is used to determine whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance;

[0176] The processing module 640 is used to control the wireless charging device not to charge the device to be charged if there is a target foreign object between the wireless charging device and the device to be charged.

[0177] In one possible implementation, the second determination module 630 is specifically used to: determine whether the target distance is within a preset range; if the target distance is not within the preset range, determine that there is a target foreign object between the wireless charging device and the device to be charged; if the target distance is within the preset range, determine that there is no target foreign object between the wireless charging device and the device to be charged.

[0178] Optionally, the device 600 also includes an acquisition module, used to: obtain the current value, quality factor, power loss and / or temperature value of the wireless charging device; the second determination module 630 is specifically used to: if the target distance is not within a preset range, and the current value is greater than or equal to a preset current value, and / or the quality factor is less than a preset quality factor value, and / or the power loss is greater than or equal to a preset power loss value, and / or the temperature value is greater than or equal to a preset temperature value, determine that there is a target foreign object between the wireless charging device and the device to be charged.

[0179] In one possible implementation, the first determination module 620 is specifically used to: obtain a reflection signal corresponding to the electromagnetic signal received by the wireless charging device; wherein the reflection signal is used to represent a signal reflected when the electromagnetic signal reaches the device to be charged; based on the reflection signal and the electromagnetic signal, obtain a target distance between the wireless charging device and the device to be charged.

[0180] In a possible implementation, the first determination module 620 is specifically used to: obtain the sending time of the electromagnetic signal and the receiving time of the reflected signal; determine the time difference based on the sending time and the receiving time; and determine the target distance based on the time difference and the preset transmission speed.

[0181] In a possible implementation, the first determination module 620 is specifically configured to: determine the product of the time difference and a preset transmission speed; and determine the quotient of the product and a preset coefficient as the target distance.

[0182] In a possible implementation, the processing module 640 is further used to: output prompt information; wherein the prompt information is used to indicate that there is a target foreign object between the wireless charging device and the device to be charged.

[0183] It should be noted that the above device 600 is embodied in the form of a functional module. The term "module" here can be implemented in the form of software and / or hardware, and is not specifically limited to this.

[0184] For example, a "module" may be a software program, a hardware circuit, or a combination of the two that implements the above functions. The hardware circuit may include an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit, and / or other suitable components that support the described functions.

[0185] Therefore, the modules of each example described in the embodiments of the present application can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0186] Figure 7 It is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application.

[0187] For example, Figure 7As shown, the vehicle 700 includes: a memory 710 and a processor 720, wherein the memory 710 stores an executable program code 7101, and the processor 720 is used to call and execute the executable program code 7101 to perform a control method for a wireless charging device.

[0188] The present application can divide the functional modules of the vehicle according to the above method example. For example, each functional module can be corresponded, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0189] In the case of dividing each functional module according to each function, the vehicle may include: a control module, a first determination module, a second determination module, a processing module, etc. It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0190] The vehicle provided in the present application is used to execute the above-mentioned control method of a wireless charging device, and thus can achieve the same effect as the above-mentioned implementation method.

[0191] In the case of an integrated unit, the vehicle may include a processing module and a storage module. The processing module may be used to control and manage the actions of the vehicle. The storage module may be used to support the vehicle in executing related program codes and data.

[0192] The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits shown in conjunction with the disclosure of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0193] The present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method of any of the above embodiments are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD (Digital Video Disc), a CD-ROM (Compact Disc Read-Only Memory), a micro drive and a magneto-optical disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), an EPROM (Erasable Programmable Read-Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a DRAM (Dynamic Random Access Memory), a VRAM (Video Random Access Memory), a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0194] The present application also provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the above-mentioned related steps to implement a control method for a wireless charging device in the above-mentioned embodiment.

[0195] In addition, the vehicle provided in the embodiments of the present application may specifically be a chip, component or module, and the vehicle may include a connected processor and memory; wherein the memory is used to store instructions, and when the vehicle is running, the processor may call and execute instructions so that the chip executes a control method for a wireless charging device in the above-mentioned embodiments.

[0196] Among them, the vehicle, computer-readable storage medium, computer program product or chip provided in this application are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0197] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0198] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0199] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A control method for a wireless charging device, characterized in that: The method comprises: When the wireless charging device is turned on, if it is detected that there is a device to be charged on the wireless charging device, the wireless charging device is controlled to send an electromagnetic signal to the device to be charged; Based on the electromagnetic signal, determining a target distance between the wireless charging device and the device to be charged; Based on the target distance, determining whether there is a target foreign object between the wireless charging device and the device to be charged; If the target foreign object exists between the wireless charging device and the device to be charged, the wireless charging device is controlled not to charge the device to be charged.

2. The method according to claim 1, characterized in that The determining, based on the target distance, whether there is a target foreign object between the wireless charging device and the device to be charged includes: Determining whether the target distance is within a preset range; If the target distance is not within the preset range, it is determined that there is the target foreign object between the wireless charging device and the device to be charged; If the target distance is within the preset range, it is determined that there is no target foreign object between the wireless charging device and the device to be charged.

3. The method according to claim 2, characterized in that The method further comprises: Obtaining a current value, a quality factor, a power loss and / or a temperature value of the wireless charging device; If the target distance is not within the preset range, determining that the target foreign object exists between the wireless charging device and the device to be charged includes: If the target distance is not within the preset range, and the current value is greater than or equal to the preset current value, and / or the quality factor is less than the preset quality factor value, and / or the power loss is greater than or equal to the preset power loss value, and / or the temperature value is greater than or equal to the preset temperature value, it is determined that the target foreign object exists between the wireless charging device and the device to be charged.

4. The method according to any one of claims 1 to 3, characterized in that The determining, based on the electromagnetic signal, a target distance between the wireless charging device and the device to be charged includes: Acquire a reflection signal corresponding to the electromagnetic signal received by the wireless charging device; wherein the reflection signal is used to represent a signal reflected when the electromagnetic signal reaches the device to be charged; Based on the reflected signal and the electromagnetic signal, a target distance between the wireless charging device and the device to be charged is obtained.

5. The method according to claim 4, characterized in that The obtaining a target distance between the wireless charging device and the device to be charged based on the reflected signal and the electromagnetic signal includes: Acquire the sending time of the electromagnetic signal and the receiving time of the reflected signal; Determining a time difference based on the sending time and the receiving time; The target distance is determined based on the time difference and a preset transmission speed.

6. The method according to claim 5, characterized in that The determining the target distance based on the time difference and the preset transmission speed includes: Determining the product of the time difference and the preset transmission speed; The quotient of the product and a preset coefficient is determined as the target distance.

7. The method according to any one of claims 1 to 3, characterized in that If the target foreign object exists between the wireless charging device and the device to be charged, the method further includes: Outputting prompt information; wherein the prompt information is used to indicate that the target foreign object exists between the wireless charging device and the device to be charged.

8. A control device for a wireless charging device, characterized in that: The device comprises: A control module, configured to control the wireless charging device to send an electromagnetic signal to the device to be charged if it is detected that there is a device to be charged on the wireless charging device when the wireless charging device is turned on; A first determination module, configured to determine a target distance between the wireless charging device and the device to be charged based on the electromagnetic signal; A second determination module is used to determine whether there is a target foreign object between the wireless charging device and the device to be charged based on the target distance; The processing module is used to control the wireless charging device not to charge the device to be charged if the target foreign object exists between the wireless charging device and the device to be charged.

9. A vehicle, characterized in that: The vehicle comprises: A memory for storing executable program codes; A processor, configured to call and run the executable program code from the memory, so that the vehicle executes the method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.

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