Wireless charging control method and device, vehicle and electronic equipment

Abstract

The invention relates to the technical field of wireless charging, and provides a wireless charging control method and device, a vehicle and electronic equipment, and the method comprises the steps: carrying out the first detection of a metal object on a charging panel if the metal object is detected on the charging panel, obtaining a first Q value, and trying to establish a communication connection with the metal object on the charging panel, and if the communication connection is established successfully, performing wireless charging authentication on the metal article on the charging panel, after the wireless charging authentication is successful, performing second detection on the metal article on the charging panel to obtain a second Q value, and if the difference value between the first Q value and the second Q value is greater than a preset calibration threshold value, controlling not to start the wireless charging function, and if the difference value between the first Q value and the second Q value is greater than the preset calibration threshold value, controlling not to start the wireless charging function. According to the wireless charging module, the metal foreign matter can be prevented from being heated by mistake and fire hazards can be avoided, even if the metal foreign matter is placed over the charging coil between the wireless charging module and the charged mobile phone, the metal foreign matter can be accurately detected, the foreign matter detection precision is improved, and the use safety of the wireless charging module is improved.

Description

Technical Field

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

[0002] With the development of electric vehicles' intelligence and electrification, in-vehicle mobile phone wireless charging has become a standard feature of more and more new electric vehicles. In-vehicle wireless charging uses electromagnetic induction to emit an alternating magnetic field, and the mobile phone receives the changing magnetic field to generate an induced current, thereby achieving the purpose of charging the mobile phone. The mobile phone charging magnetic field will form eddy currents on the metal foreign objects in the charging area, causing the temperature of the foreign objects to rise, and in extreme cases, they will be burned or cause a fire. For the foreign object detection (FOD, Foreign Object Detection) method, the more widely used methods in related technologies include the power loss method (Ploss, Power loss method) and the Q value method. Among them, when using Ploss to detect foreign objects, the difference between the transmitting power of the transmitting coil and the receiving power of the receiving coil is calculated (expressed by P-loss). When P-loss is greater than the calibration threshold, it is determined that there is a metal foreign object and charging is stopped. The Q value method is to obtain the current Q value and compare it with the calibration threshold to determine whether there is a foreign object.

[0003] However, for the scenario where the foreign object is placed between the wireless charging module and the charged mobile phone, but not directly above the charging coil, such as when the remote control key is placed between the wireless charging module and the charged mobile phone, but not directly above the charging coil, if Ploss is used for foreign object detection, the threshold for foreign object detection is usually not reached. If the P-loss threshold is calibrated too small, it is possible that the mobile phone placed at the edge of the charging area will be misjudged to have a metal foreign object, resulting in a failure to charge. If the Q value method is used for foreign object detection, the Q value at this time does not change much from the Q value of the mobile phone placed alone, and it is impossible to determine whether there is a metal foreign object in the charging area. It can be seen that for the above scenarios, the foreign object detection methods provided by the relevant technologies cannot accurately identify metal foreign objects that are smaller or not completely placed directly above the charging coil, thereby causing the wireless charging module to blindly turn on the wireless charging function, which may cause the metal foreign object to be heated and even cause a fire hazard. Summary of the invention

[0004] The embodiments of the present application provide a wireless charging control method, device, vehicle and storage medium to solve the technical problem that the foreign object detection methods provided by the related arts cannot accurately identify small metal foreign objects or those that are not completely placed directly above the charging coil, thereby causing the wireless charging module to blindly activate the wireless charging function, which may cause the metal foreign objects to be heated and even cause a fire hazard.

[0005] An embodiment of the present application provides a wireless charging control method, the method comprising: if a metal object is detected on a charging panel, performing a first detection on the metal object on the charging panel to obtain a first Q value, and attempting to establish a communication connection with the metal object on the charging panel; if the communication connection is successfully established, performing a wireless charging authentication on the metal object on the charging panel; after the wireless charging authentication is successful, performing a second detection on the metal object on the charging panel to obtain a second Q value; determining a difference between the first Q value and the second Q value, and if the difference is greater than a preset calibration threshold, controlling not to start the wireless charging function.

[0006] In one embodiment of the present application, if the difference is greater than a preset calibration threshold, the method further includes: if the charging panel is configured in a vehicle, generating a metal foreign object alarm signal, and feeding back the metal foreign object alarm signal to the vehicle; and displaying the metal foreign object alarm signal through an alarm display device of the vehicle.

[0007] In one embodiment of the present application, the alarm display device includes a vehicle-mounted screen, and displaying the metal foreign object alarm signal through the alarm display device of the vehicle includes: displaying the metal foreign object alarm signal through the vehicle-mounted screen.

[0008] In one embodiment of the present application, the method also includes: after the wireless charging authentication is successful, determining that there is a target to be charged on the charging panel; if the difference is less than or equal to the preset calibration threshold, obtaining the required charging power by communicating with the target to be charged on the charging panel; and starting the wireless charging function based on the required charging power to wirelessly charge the target to be charged.

[0009] In one embodiment of the present application, before starting the wireless charging function based on the required charging power, the method includes: obtaining a preset calibrated Q value of the target to be charged; determining the difference between the preset calibrated Q value and the second Q value, and if the difference is less than a preset difference threshold, triggering the step of starting the wireless charging function based on the required charging power.

[0010] In one embodiment of the present application, before performing a second detection on the metal object on the charging panel, the method also includes: obtaining the initial detection moment when the metal object is detected on the charging panel, and the communication establishment moment when the communication connection is established; determining the time interval between the initial detection moment and the communication establishment moment, and if the time interval is greater than a preset interval threshold, triggering the step of performing a second detection on the metal object on the charging panel.

[0011] In one embodiment of the present application, after determining the time interval between the initial detection moment and the communication establishment moment, the method further includes: after the wireless charging authentication is successful, determining that there is a target to be charged on the charging panel; if the time interval is less than or equal to a preset interval threshold, obtaining the required charging power by communicating with the target to be charged on the charging panel; and starting the wireless charging function based on the required charging power to wirelessly charge the target to be charged.

[0012] An embodiment of the present application also provides a wireless charging control device, which includes: a detection module, which is used to perform a first detection on the metal object on the charging panel to obtain a first Q value if a metal object is detected on the charging panel; a communication module, which is used to attempt to establish a communication connection with the metal object on the charging panel, and if the communication connection is successfully established, perform wireless charging authentication on the metal object on the charging panel; the detection module is also used to perform a second detection on the metal object on the charging panel after the wireless charging authentication is successful to obtain a second Q value; a control module, which is used to determine the difference between the first Q value and the second Q value, and if the difference is greater than a preset calibration threshold, control the wireless charging function not to be started.

[0013] An embodiment of the present application also provides a vehicle, comprising the wireless charging control device as described in any one of the above embodiments.

[0014] An embodiment of the present application further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in any one of the above embodiments when executing the computer program.

[0015] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described in any one of the above embodiments is implemented.

[0016] In the scheme implemented by the wireless charging control method, device, vehicle and storage medium provided above, if a metal object is detected on the charging panel, on the one hand, the metal object on the charging panel is first detected to obtain a first Q value, and on the other hand, a communication connection is attempted to be established with the metal object on the charging panel. If the communication connection is successfully established, the metal object on the charging panel is wirelessly charged and authenticated. After the wireless charging authentication is successful, the metal object on the charging panel is secondly detected to obtain a second Q value. If the difference between the first Q value and the second Q value is greater than a preset calibration threshold, the wireless charging function is controlled not to be started. The first Q value is obtained by starting the first detection of the object on the charging panel before establishing the communication connection and the wireless charging authentication. After completing the wireless charging authentication, the items on the charging panel are inspected for the second time to obtain the second Q value, and then the difference between the two is greater than the preset calibration threshold to determine whether there is a metal foreign object on the charging panel. If the difference is greater than the preset calibration threshold, there is a metal foreign object and the wireless charging function is not started, thereby avoiding the metal foreign object from being heated by mistake and avoiding possible fire hazards. This solution does not have high requirements for the placement of the metal foreign object. Even if the metal foreign object is placed between the wireless charging module and the charged mobile phone, the scene directly above the charging coil can be accurately detected, which improves the accuracy of foreign object detection and can identify more and smaller metal foreign objects, thereby improving the safety of using wireless charging modules such as the car-mounted mobile phone wireless charging function and reducing the market after-sales maintenance costs.

[0017] In addition, in some other embodiments, the implementation of this method can also reduce the difficulty of foreign object identification in wireless charging scenarios. Since the presence of metal foreign objects is determined based on the comparison of the difference between the two Q values ​​obtained by twice detecting the items on the charging panel before and after successful authentication with a preset calibration threshold, there is no need to calibrate the preset calibration Q value of each model of the device to be charged (such as a mobile phone, etc.) during the development stage, which reduces the threshold for implementation of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0019] Figure 1 A schematic diagram of a flow chart of a wireless charging control method provided in an embodiment of the present application;

[0020] Figure 2 A specific flow chart of the wireless charging control method provided in the embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a wireless charging control device provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] See also Figure 1 As shown, Figure 1 A flow chart of a wireless charging control method provided in an embodiment of the present application, the method comprising the following steps:

[0025] Step S110: if a metal object is detected on the charging panel, a first detection is performed on the metal object on the charging panel to obtain a first Q value, and an attempt is made to establish a communication connection with the metal object on the charging panel.

[0026] The wireless charging control method can be applied to a wireless charging module, which can be configured on vehicles and other equipment, or can be used alone. The wireless charging module includes a charging panel, which is used to place items to be charged and can also be used as a temporary storage area for items. When the wireless charging module is started, it will detect in real time whether metal objects are placed on the charging panel. The specific identification method of the metal objects can adopt technical means known to those skilled in the art, which is not limited here. As an example, the wireless charging module detects whether there are metal objects on the charging panel through magnetic field coupling. The first Q value and the attempt to establish a communication connection can be simultaneous, or can be performed in sequence according to the settings of those skilled in the art, which is not limited here.

[0027] As an example, when this method is applied to a wireless charging module on the vehicle side, after the vehicle is powered on, the power switches to the ON position, the wireless charging module is awakened and is in working state, and the wireless charging function switch is in the turned on state, the wireless charging module is triggered to detect whether there are metal objects on the charging panel. This can avoid meaningless detection of objects temporarily stored on the charging panel when charging is not needed, thereby saving power.

[0028] There is a linear conversion relationship between Q value and AC impedance. As an example, the definition of Q value is as follows:

[0029]

[0030] Among them, Q is the Q value (quality factor), L1 is the inductance of the transmitting coil, Rtxacr is the AC impedance of the transmitting coil, and f is the resonant frequency of the resonant network of the wireless charging module.

[0031] The quality factor refers to the quality factor of the resonant circuit in the wireless charging system, which is used to balance the energy loss of the circuit.

[0032] The formula used to determine the first Q value in step S110 and the second Q value in the subsequent step is the same.

[0033] The specific detection method of the Q value can be implemented in a manner known to those skilled in the art and is not limited here.

[0034] At the same time as the detection of the first Q value is initiated, or within a preset time after the first Q value is initiated, the step of attempting to establish a communication connection with the metal object on the charging panel is initiated. Generally speaking, the objects charged by the wireless charging module are often objects that can communicate, such as mobile phones. Before formally performing wireless charging, it is necessary to first perform wireless charging authentication with the object to be charged, and wireless charging is initiated only after the wireless charging authentication is successful. Therefore, it is necessary to attempt to establish a communication connection with the metal object after the metal object is detected. As an example, the communication magnetic field can be activated by the wireless charging module, and the object to be charged can be continuously pinged to establish communication.

[0035] Step S120: If the communication connection is successfully established, wireless charging authentication is performed on the metal object on the charging panel.

[0036] The wireless charging authentication method can be authenticated by a method known to those skilled in the art, which will not be described in detail here. For example, wireless charging authentication is performed on an object that has successfully established a communication connection with a mobile phone or the like according to the Qi protocol.

[0037] Step S130, after the wireless charging authentication is successful, a second detection is performed on the metal object on the charging panel to obtain a second Q value.

[0038] The second detection method is the same as the first detection method. If the object that successfully establishes a communication connection is placed on the charging panel after the first Q value is obtained during the first detection, then the second Q value is the Q value of the object that successfully establishes a communication connection + the metal object initially placed on the charging panel (that is, the metal object identified in step S110). If no new object is placed after the first Q value is detected, the metal object that establishes a communication connection is the metal object that detects the first Q value, and the second Q value is the same metal object. Considering that the speed of communication connection and authentication is fast, the speed of Q value detection is also fast. The error caused by the placement of new objects after the authentication is successful and before the second Q value detection is completed can be ignored here. Of course, even if there are objects placed on metal objects such as mobile phones that can successfully establish a communication connection and wireless charging authentication, it is relatively safe to charge the mobile phone.

[0039] It can be understood that in this embodiment, the "metal object on the charging panel" is not necessarily a specific metal object, but all metal objects on the charging panel. When there is a change in the object, the first detection and the second detection are aimed at all metal objects that can be detected and objectively exist on the charging panel during the current detection cycle.

[0040] In one embodiment, before performing a second detection on the metal object on the charging panel, the method further includes: obtaining the initial detection moment when the metal object is detected on the charging panel, and the communication establishment moment when the communication connection is established; determining the time interval between the initial detection moment and the communication establishment moment, and if the time interval is greater than a preset interval threshold, triggering the step of performing a second detection on the metal object on the charging panel.

[0041] Continuing from the above embodiment, after determining the time interval between the initial detection moment and the communication establishment moment, the method also includes: after the wireless charging authentication is successful, determining that there is a target to be charged on the charging panel; if the time interval is less than or equal to a preset interval threshold, obtaining the required charging power by communicating with the target to be charged on the charging panel; and starting the wireless charging function based on the required charging power to wirelessly charge the target to be charged.

[0042] As mentioned in the above embodiments, the time consumption of Q value detection, communication connection establishment, and wireless charging authentication is relatively short. Under normal circumstances, if the metal object placed on the charging panel for the first time is an object to be charged, such as a mobile phone, then the communication connection establishment and wireless charging authentication will be completed before the first Q value detection is completed, or within a short period of time after the first Q value detection is completed. Therefore, if the time interval between the communication establishment moment and the initial detection moment is too large, it means that the mobile phone and other objects may be placed on the charging panel after the metal object is detected for the first time, and then it is necessary to perform a second Q value detection. On the contrary, if the time interval between the communication establishment moment and the initial detection moment is relatively small, that is, the time interval is less than or equal to the preset interval threshold, then theoretically, it can be considered that the object on the charging panel has not changed, that is, the object to be charged. At this time, the metal object on the charging panel can be used as a target to be charged, and then communicate with the target to be charged to know its required charging power, which can be one or more values, and then start the wireless charging function according to the charging power that can be provided, and wirelessly charge the target to be charged. If multiple charging powers can be provided, then wireless charging can be performed based on user selection, or selection rules set by technicians in this field, or the maximum power can be directly selected. It should be known that obtaining the required charging power by communicating with the target to be charged on the charging panel can be obtained through communication alone after determining that the time interval is less than or equal to the preset interval threshold, or it can be obtained after wireless charging authentication or communication connection establishment. In other words, in some embodiments, the timing of obtaining the required charging power is not limited, and technicians in this field can complete the acquisition of the required charging power before starting the wireless charging function as needed.

[0043] It can be understood that in some embodiments, before starting the detection of the second Q value, it is necessary to first determine whether the time interval is greater than the preset interval threshold. If the time interval is less than or equal to the preset interval threshold, the first Q value can be compared with the preset calibrated Q value of the metal object. If the difference between the first Q value and the preset calibrated Q value is less than the preset difference standard, the wireless charging function can be started. If the time interval is greater than the preset interval threshold, then the second detection is started to obtain the second Q value, and then step S140 is executed. In this way, the judgment of whether there is a metal foreign body can be completed quickly, and the accuracy of the judgment of whether there is a metal foreign body can be improved.

[0044] Step S140, determining a difference between the first Q value and the second Q value, and if the difference is greater than a preset calibration threshold, controlling not to start the wireless charging function.

[0045] The difference value may be the absolute value of data obtained by subtracting the first Q value from the second Q value. As an example, the method for determining the difference value may refer to formula (2);

[0046] △Q=|Q2-Q1|(2),

[0047] Among them, △Q is the difference, Q1 is the first Q value, and Q2 is the second Q value.

[0048] The preset calibration threshold may be set by a person skilled in the art as required. For example, the preset calibration threshold needs to take into account the error in Q value measurement caused by system fluctuations.

[0049] If the difference is greater than the preset calibration threshold, it can be considered that there is a metal foreign object. The metal object detected by the first Q value is the metal foreign object. At this time, if the wireless charging function is activated, the metal foreign object will be heated, which may cause a fire hazard. If the metal foreign object is a car key or other item, it will also damage the car key, causing trouble.

[0050] In the above scenario, there are the following possibilities: 1. If the metal object placed on the charging panel is an item that does not need to be charged, such as a car key, then the subsequent communication connection cannot be established successfully, and the wireless charging authentication will not be successful, and the wireless charging function will naturally not be activated subsequently. 2. If the metal object placed on the charging panel is an item that needs to be charged, such as a mobile phone, then if the communication connection can be established successfully and the wireless charging authentication is successful, at this time, the first Q value detected is also the first Q value of the mobile phone and other items that need to be charged, and then the second Q value detected after the wireless charging authentication is successful is also the second Q value of the mobile phone and other items that need to be charged. Since there is no metal foreign matter between the mobile phone and the charging panel that affects charging, the difference between the first Q value and the second Q value will not be greater than the preset calibration threshold, and will not affect the normal activation of the wireless charging function. 3. First place metal foreign objects such as car keys on the charging panel, then start the communication connection with the metal objects on the charging panel, and detect the first Q value, which is the Q value of the metal foreign object. Subsequently, place mobile phones and other items that need to be charged on the charging panel. In this way, the communication connection can be successfully achieved. If the subsequent wireless charging authentication is successful, the second Q value obtained by the second detection is the Q value of the metal foreign object and the mobile phone. Obviously, there is a difference between the two. Then the difference between the first Q value and the second Q value will inevitably be greater than the preset calibration threshold. Then we believe that there is a metal foreign object and the wireless charging function is not started.

[0051] In one embodiment, if the difference is greater than a preset calibration threshold, the method further includes: if the charging panel is configured in a vehicle, generating a metal foreign object alarm signal, and feeding the metal foreign object alarm signal back to the vehicle; and displaying the metal foreign object alarm signal through an alarm display device of the vehicle.

[0052] Following the above embodiment, the alarm display device includes a vehicle-mounted screen, and the metal foreign body alarm signal is displayed through the vehicle's alarm display device, including: displaying the metal foreign body alarm signal through the vehicle-mounted screen.

[0053] If the wireless charging control method provided in this embodiment is applied to the vehicle-mounted wireless charging function, the alarm display device can be one or more of a vehicle-mounted voice device, a vehicle-mounted screen, a vehicle-mounted light, etc., then at this time, the vehicle-side voice prompt, the vehicle-mounted large screen prompt, the vehicle-mounted light prompt, etc. can be linked to remind the user that there is a metal foreign body on the charging panel, so that the user can remove the metal foreign body in time before charging. If the wireless charging function is simply not started, although the safety of metal foreign bodies (such as car keys, etc.) can be guaranteed, since the user may not pay attention to whether the device to be charged, such as a mobile phone, is successfully charged, once the charging is not started for a long time, it may cause the user to be unable to use the device to be charged normally later, reducing the user experience. Therefore, the metal foreign body alarm signal can be displayed through the vehicle's alarm display device to remind the user to remove the metal foreign body, start the wireless charging function in time, meet the user's needs, and improve the user experience.

[0054] In one embodiment, the method further includes: after the wireless charging authentication is successful, determining that there is a target to be charged on the charging panel; if the difference is less than or equal to a preset calibration threshold, obtaining the required charging power by communicating with the target to be charged on the charging panel; and starting the wireless charging function based on the required charging power to wirelessly charge the target to be charged.

[0055] After the wireless charging authentication is successful, it means that there is indeed a device that needs to be charged on the charging panel, that is, the target to be charged. Different from the previous embodiment, which discusses the situation where there is a metal foreign body on the charging panel at the beginning and then the target to be charged is placed, the scenario discussed in this embodiment is that the time interval is too long due to special reasons, and the time interval is greater than the preset interval threshold. However, during the execution of the entire method, the targets to be charged are placed on the charging panel. At this time, it can be determined whether the difference is less than or equal to the preset calibration threshold. If the difference between the first Q value and the second Q value is less than or equal to the preset calibration threshold, the wireless charging function can be started. Similar to the previous embodiment, the timing of obtaining the required charging power in this embodiment can be limited to before starting the wireless charging function, and it is not necessary to be after determining that the difference is less than or equal to the preset calibration threshold.

[0056] Following the above embodiment, before starting the wireless charging function based on the required charging power, the method includes: obtaining a preset calibrated Q value of the target to be charged; determining the difference between the preset calibrated Q value and the second Q value, and if the difference is less than the preset difference threshold, triggering the step of starting the wireless charging function based on the required charging power. That is, even if it is determined that the difference between the first Q value and the second Q value is small, it can be preliminarily judged that there is no foreign matter on the charging panel. For the sake of safety, it is still possible to judge whether the current second Q value is reasonable by the preset calibrated Q value of the target to be charged, so as to further ensure charging safety. The preset calibrated Q value is the accurate Q value pre-determined for the target to be charged.

[0057] The wireless charging control method provided in the above embodiment is that if a metal object is detected on the charging panel, on the one hand, the metal object on the charging panel is first detected to obtain a first Q value, and on the other hand, a communication connection is attempted to be established with the metal object on the charging panel. If the communication connection is successfully established, the metal object on the charging panel is wirelessly charged and authenticated. After the wireless charging authentication is successful, the metal object on the charging panel is secondly detected to obtain a second Q value. If the difference between the first Q value and the second Q value is greater than a preset calibration threshold, the wireless charging function is controlled not to be started. By starting the first detection of the object on the charging panel to obtain the first Q value before establishing the communication connection and the wireless charging authentication, after the wireless charging authentication is completed, the wireless charging function is controlled not to be started. Then, the items on the charging panel are inspected for the second time to obtain the second Q value, and then whether there is a metal foreign object on the charging panel is determined based on whether the difference between the two is greater than the preset calibration threshold. If the difference is greater than the preset calibration threshold, there is a metal foreign object, and the wireless charging function is not started, thereby avoiding the metal foreign object from being heated by mistake and avoiding possible fire hazards. This solution does not have high requirements for the placement of the metal foreign object. Even if the metal foreign object is placed between the wireless charging module and the charged mobile phone, the scene directly above the charging coil can be accurately detected, which improves the foreign object detection accuracy, can identify more and smaller metal foreign objects, improves the safety of using wireless charging modules such as the car-mounted mobile phone wireless charging function, and reduces the market after-sales maintenance costs.

[0058] By optimizing the software algorithm designed based on the wireless charging control method provided in the above embodiment on the basis of foreign object detection of the wireless charging Qi protocol, the metal foreign object recognition is made more comprehensive, thereby reducing the risk of ablating objects when the mobile phone is waiting to be charged during wireless charging.

[0059] In the related art, metal foreign objects such as remote control keys are placed between the wireless charging module and the charged mobile phone, but not directly above the charging coil. At this time, the Q value does not change much from the Q value of the mobile phone placed alone, and it is impossible to determine the presence of metal foreign objects in the charging area, causing the button battery in the remote control key to be heated and burned. For another example, the remote control key is placed between the wireless charging module and the charged mobile phone, but not directly above the charging coil. The P-loss method does not reach the threshold of foreign object detection, and does not detect the metal foreign object causing the button battery in the remote control key to be heated and burned. The P-loss threshold cannot be calibrated too small, otherwise the mobile phone placed at the edge of the charging area will misjudge the presence of metal foreign objects, resulting in failure to charge. This is because in the prior art, the wireless charging QI protocol foreign object detection cannot accurately identify smaller metal foreign objects or metal foreign objects that are not completely placed directly above the charging coil through the Q value and P-loss method, causing the metal foreign objects to be heated and burned. In the related technology, the Q value foreign body detection of the wireless charging module adopts the method formulated by the Qi protocol. Instead of detecting and recording the Q value before pinging the mobile phone, the Q value is detected directly after the mobile phone is pinged, and then compared with the Q value calibrated by the mobile phone before. However, there are some situations where metal foreign bodies cannot be identified. For example, the metal content of the metal foreign body is small, the metal foreign body is not placed in the middle of the charging coil of the wireless charging module, and only a part of it is inside the charging coil. In this case, the Q value of the metal foreign body is not much different from that of the metal foreign body placed or not placed.

[0060] In view of the problems in the above scenarios, an exemplary description is given by taking the application of the wireless charging control method to the vehicle side and the charging target being a mobile phone as an example. Figure 2 , Figure 2 A specific flow chart of the wireless charging control method provided in the embodiment of the present application. In the initial stage, the car is powered on, the power jumps to the ON position, the wireless charging module is awakened and in working state, and the wireless charging function switch is in the turned-on state. Figure 2As shown, after the start, the mobile phone wireless charging module function is turned on and detects the object to detect whether it contains metal. If so, the metal content Q1 (first Q value) is recorded, and the mobile phone is pinged to establish communication, and then it is detected whether the connection with the mobile phone is successful. If so, the metal content Q2 (second Q value) is detected, and the difference △Q (△Q=Q2-Q1) is calculated to determine whether △Q is greater than the preset calibration threshold. If (△Q is greater than the preset calibration threshold), it is determined that there is a metal foreign body in the charging area (on the charging panel), and the charging is not started and an alarm signal is issued to end the process. On the contrary, if it is detected that there is no metal, or the connection with the mobile phone is not successful, then the mobile phone wireless charging module function is turned on and the object is detected. If △Q is less than or equal to the preset calibration threshold, the mobile phone wireless charging is started according to the charging power required by the mobile phone. In the specific implementation, the wireless charging module detects whether there are metal objects on the panel through magnetic field coupling and records the metal object content Q1. If there are metal objects, the communication magnetic field is started, and the mobile phone is continuously pinged to establish communication. The wireless charging module performs wireless charging authentication with the mobile phone according to the Qi protocol. After the authentication is successful, the metal content Q2 is detected again. The metal content difference △Q=Q2-Q1 is calculated. When △Q is greater than the calibration threshold, it is determined that there is metal foreign matter on the wireless charging panel, and the wireless charging module does not start the charging function. At the same time, the metal foreign matter alarm signal is fed back to the entire vehicle, and the entire vehicle transmits it to the user through the large screen.

[0061] The wireless charging control method provided by the above embodiment can reduce the difficulty of wireless charging foreign body identification, and it is not necessary to calibrate the Q value of each mobile phone in the development stage. The accuracy of foreign body detection is improved, and more and smaller metal foreign bodies can be identified, which improves the safety of the wireless charging function of the in-vehicle mobile phone and reduces the market after-sales maintenance cost, for example, avoiding the scenario of the remote control key being burned.

[0062] In one embodiment, a wireless charging control device is provided, and the wireless charging control device is used to execute the wireless charging control method provided in any of the above embodiments. Figure 3 , Figure 3 A schematic diagram of the structure of a wireless charging control device provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the wireless charging control device 300 includes a detection module 301, which is used to perform a first detection on the metal object on the charging panel to obtain a first Q value if a metal object is detected on the charging panel; a communication module 302, which is used to attempt to establish a communication connection with the metal object on the charging panel, and if the communication connection is successfully established, perform wireless charging authentication on the metal object on the charging panel; the detection module 301 is also used to perform a second detection on the metal object on the charging panel after the wireless charging authentication is successful to obtain a second Q value; a control module 303, which is used to determine the difference between the first Q value and the second Q value, and if the difference is greater than a preset calibration threshold, control the wireless charging function not to be started.

[0063] In one embodiment, the control module is also used to generate a metal foreign object alarm signal if the difference is greater than a preset calibration threshold, if the charging panel is configured in the vehicle, and feed the metal foreign object alarm signal back to the vehicle; and display the metal foreign object alarm signal through the vehicle's alarm display device.

[0064] In one embodiment, the alarm display device includes a vehicle-mounted screen, and the control module is further used to display the metal foreign body alarm signal through the vehicle-mounted screen.

[0065] In one embodiment, the device also includes a charging confirmation module, which is used to determine whether there is a target to be charged on the charging panel after the wireless charging authentication is successful; if the difference is less than or equal to a preset calibration threshold, the required charging power is obtained by communicating with the target to be charged on the charging panel; and the wireless charging function is started based on the required charging power to wirelessly charge the target to be charged.

[0066] In one embodiment, the charging confirmation module is also used to obtain a preset calibrated Q value of the target to be charged before starting the wireless charging function based on the required charging power; determine the difference between the preset calibrated Q value and the second Q value, and if the difference is less than a preset difference threshold, trigger the wireless charging function based on the required charging power.

[0067] In one embodiment, the device also includes a pre-judgment module, which is used to obtain the initial detection time when the metal object is detected on the charging panel and the communication establishment time when the communication connection is established before performing a second detection on the metal object on the charging panel; determine the time interval between the initial detection time and the communication establishment time, and if the time interval is greater than a preset interval threshold, trigger a second detection of the metal object on the charging panel.

[0068] In one embodiment, the pre-judgment module is also used to determine the time interval between the initial detection moment and the communication establishment moment, and after the wireless charging authentication is successful, determine that there is a target to be charged on the charging panel; if the time interval is less than or equal to a preset interval threshold, obtain the required charging power by communicating with the target to be charged on the charging panel; and start the wireless charging function based on the required charging power to wirelessly charge the target to be charged.

[0069] For the specific definition of the wireless charging control device, please refer to the definition of the wireless charging control method above, which will not be repeated here. Each module in the above wireless charging control device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the electronic device in hardware form, or can be stored in the memory of the electronic device in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0070] In this embodiment, the wireless charging control device is substantially provided with a plurality of modules for executing the wireless charging control method in any of the above embodiments. The specific functions and technical effects may refer to the above embodiments and will not be described in detail here.

[0071] In one embodiment, a vehicle is provided, the new energy vehicle comprising the wireless charging control device provided in any of the above embodiments. The specific functions and technical effects of the vehicle can refer to the above embodiments, and will not be repeated here.

[0072] See also Figure 4 An embodiment of the present invention further provides an electronic device 400, including a processor 401, a memory 402 and a communication bus 403; the communication bus 403 is used to connect the processor 401 and the memory 402; the processor 401 is used to execute a computer program stored in the memory 402 to implement a method as described in any one of the above embodiments.

[0073] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. The computer program is used to enable a computer to execute the method described in any one of the above embodiments.

[0074] The embodiment of the present application also provides a non-volatile readable storage medium, which stores one or more modules (programs). When the one or more modules are applied to a device, the device can execute instructions (instructions) of the steps included in the embodiment 1 of the embodiment of the present application.

[0075] The embodiment of the present application also provides a computer program product, including a computer program, which can implement the steps and corresponding contents of the aforementioned method embodiment when executed by a processor.

[0076] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0077] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0078] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0079] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0080] It should be understood that the terms "first", "second", etc. mentioned in this application are used to distinguish similar objects, and do not necessarily represent that they refer to a specific order or sequence. The technical features in which these terms are located can be interchanged under appropriate circumstances, so that the embodiments of the application described here can be implemented in an order other than the illustrated or written description.

[0081] It should be understood that although the flowcharts provided in the embodiments of the present application indicate the steps by arrows, the order indicated by the arrows does not necessarily limit the order in which the steps are implemented. Those skilled in the art can perform the steps in other orders according to the requirements for different implementation scenarios.

[0082] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A wireless charging control method, characterized in that: The method comprises: If a metal object is detected on the charging panel, performing a first detection on the metal object on the charging panel to obtain a first Q value, and attempting to establish a communication connection with the metal object on the charging panel; If the communication connection is successfully established, wireless charging authentication is performed on the metal object on the charging panel; After the wireless charging authentication is successful, the metal object on the charging panel is tested for a second time to obtain a second Q value; A difference between the first Q value and the second Q value is determined, and if the difference is greater than a preset calibration threshold, the wireless charging function is controlled not to be started.

2. The wireless charging control method according to claim 1, characterized in that: If the difference is greater than a preset calibration threshold, the method further includes: If the charging panel is configured in a vehicle, generating a metal foreign object alarm signal, and feeding back the metal foreign object alarm signal to the vehicle; The metal foreign body alarm signal is displayed by the alarm display device of the vehicle.

3. The wireless charging control method according to claim 2, characterized in that: The alarm display device includes a vehicle-mounted screen, and the metal foreign body alarm signal is displayed by the alarm display device of the vehicle, including: The metal foreign body alarm signal is displayed through the vehicle-mounted screen.

4. The wireless charging control method according to claim 1, wherein: The method further comprises: After the wireless charging authentication is successful, it is determined that there is a target to be charged on the charging panel; If the difference is less than or equal to the preset calibration threshold, the required charging power is obtained by communicating with the target to be charged on the charging panel; A wireless charging function is started based on the required charging power to wirelessly charge the target to be charged.

5. The wireless charging control method according to claim 4, characterized in that: Before starting the wireless charging function based on the required charging power, the method includes: Obtaining a preset calibrated Q value of the target to be charged; The difference between the preset calibration Q value and the second Q value is determined, and if the difference is less than a preset difference threshold, a step of starting a wireless charging function based on the required charging power is triggered.

6. The wireless charging control method according to any one of claims 1 to 5, characterized in that: Before performing a second detection on the metal object on the charging panel, the method further includes: Obtaining the initial detection time when the metal object is detected on the charging panel and the communication establishment time when the communication connection is established; Determine the time interval between the initial detection moment and the communication establishment moment, and if the time interval is greater than a preset interval threshold, trigger a step of performing a second detection on the metal object on the charging panel.

7. The wireless charging control method according to claim 6, characterized in that: After determining the time interval between the initial detection moment and the communication establishment moment, the method further includes: After the wireless charging authentication is successful, it is determined that there is a target to be charged on the charging panel; If the time interval is less than or equal to the preset interval threshold, the required charging power is obtained by communicating with the target to be charged on the charging panel; A wireless charging function is started based on the required charging power to wirelessly charge the target to be charged.

8. A wireless charging control device, characterized in that: The device comprises: A detection module, configured to perform a first detection on the metal object on the charging panel to obtain a first Q value if a metal object is detected on the charging panel; a communication module, configured to attempt to establish a communication connection with the metal object on the charging panel, and if the communication connection is successfully established, to perform wireless charging authentication on the metal object on the charging panel; The detection module is also used to perform a second detection on the metal object on the charging panel after the wireless charging authentication is successful, to obtain a second Q value; The control module is used to determine the difference between the first Q value and the second Q value, and if the difference is greater than a preset calibration threshold, control not to start the wireless charging function.

9. A vehicle, characterized in that: The vehicle includes the wireless charging control device as claimed in claim 8.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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