Wireless charging equipment control method, power supply equipment and charged equipment

Abstract

The invention relates to a wireless charging equipment control method, power supply equipment and charged equipment, wireless charging equipment comprises the power supply equipment and the charged equipment, the power supply equipment charges the charged equipment in a wireless charging mode, and temperature field data is acquired in the charging process of the wireless charging equipment; the temperature field data comprises temperature data corresponding to a plurality of positions of a charging surface, and the charging surface is a surface where the power supply equipment and the charged equipment are close to each other during charging; determining whether temperature mutation exists or not according to the temperature field data; and if yes, controlling the wireless charging equipment to reduce the charging power. Temperature field data are obtained by detecting the temperatures of multiple positions of a charging surface during charging, whether temperature sudden change exists or not is judged by analyzing the temperature field data, and if yes, the wireless charging equipment is controlled to reduce the charging power, so that possible damage to the wireless charging equipment caused by foreign matters under the condition of continuous high-power charging is reduced, and the charging efficiency is improved. And the working reliability of the wireless charging equipment is improved.

Description

Technical Field

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

[0002] With the development of science and technology, wireless charging technology has emerged. Wireless charging devices are charged based on wireless charging technology. The power supply device charges the charged device through wireless charging. There is no need to prepare a matching charging cable when charging, which is convenient to use.

[0003] However, if there are conductive foreign objects at the charging position, these foreign objects will generate heat during the wireless charging process. If the user does not clean the foreign objects in time, the heat generated by the foreign objects will damage the product in the long run, and even affect the normal function of the product in serious cases. Therefore, the working reliability of traditional wireless charging devices is low. Summary of the invention

[0004] Based on this, it is necessary to provide a wireless charging device control method, a power supply device and a charged device that can improve the working reliability of the wireless charging device in order to address the technical problem of low working reliability of the traditional wireless charging device.

[0005] In a first aspect, the present application provides a method for controlling a wireless charging device, wherein the wireless charging device includes a power supply device and a charged device, and the power supply device charges the charged device by wireless charging;

[0006] The method comprises:

[0007] During the charging process of the wireless charging device, temperature field data is obtained; the temperature field data includes temperature data corresponding to multiple positions of a charging surface, and the charging surface is a surface where the power supply device and the charged device are close to each other during charging;

[0008] Determining whether there is a sudden temperature change according to the temperature field data;

[0009] If so, control the wireless charging device to reduce the charging power.

[0010] In one embodiment, determining whether there is a sudden temperature change according to the temperature field data includes:

[0011] Determine a sampled temperature difference value in the temperature field data; the sampled temperature difference value is a difference value of temperature data corresponding to two adjacent positions in the charging surface;

[0012] If there is a sampled temperature difference value exceeding the first preset temperature, it is determined that there is a sudden temperature change.

[0013] In one embodiment, after determining a sampled temperature difference value in the temperature field data, the method further includes:

[0014] If there is no sampled temperature difference value exceeding the first preset temperature, obtaining the temperature mean value of the current temperature field data;

[0015] Obtaining a temperature mean value of basic temperature field data; the basic temperature field data is temperature field data collected before collecting current temperature field data;

[0016] It is determined whether there is a temperature mutation according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

[0017] In one embodiment, determining whether there is a sudden temperature change according to the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data includes:

[0018] If the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a second preset temperature, it is determined that a sudden temperature change exists.

[0019] In one embodiment, if there is a sampled temperature difference value exceeding the first preset temperature, after determining that there is a temperature mutation, controlling the wireless charging device to reduce the charging power includes:

[0020] Acquire the highest temperature data corresponding to the sampled temperature difference value exceeding the first preset temperature;

[0021] Obtaining a minimum value of comparative temperature data; the comparative temperature data is temperature data corresponding to each position adjacent to the position corresponding to the highest temperature data;

[0022] According to a minimum value between the maximum temperature data and the comparison temperature data, the wireless charging device is controlled to reduce charging power.

[0023] In one embodiment, controlling the wireless charging device to reduce charging power according to the minimum value of the maximum temperature data and the comparison temperature data includes:

[0024] If the difference between the maximum temperature data and the minimum value of the comparison temperature data does not exceed a third preset temperature, controlling the wireless charging device to reduce the charging power;

[0025] If the difference between the maximum temperature data and the minimum value of the comparison temperature data exceeds the third preset temperature, the wireless charging device is controlled to stop charging.

[0026] In one embodiment, determining whether there is a sudden temperature change according to the temperature field data includes:

[0027] Get the mean temperature of the current temperature field data;

[0028] Obtaining a temperature mean value of basic temperature field data; the basic temperature field data is temperature field data collected before collecting current temperature field data;

[0029] It is determined whether there is a temperature mutation according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

[0030] In one embodiment, determining whether there is a sudden temperature change according to the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data includes:

[0031] If the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a fourth preset temperature, it is determined that a sudden temperature change exists.

[0032] In one embodiment, the method further comprises:

[0033] If it is determined that there is a sudden temperature change, a prompt message is issued.

[0034] In a second aspect, the present application further provides a power supply device for charging a charged device by wireless charging, the power supply device comprising a power supply device body and two or more temperature detection devices;

[0035] Each of the temperature detection devices is arranged on the charging surface of the power supply device body, and is used to collect temperature field data and send it to the power supply device body during the charging process of the power supply device body;

[0036] The power supply device body is used to execute the above method.

[0037] In one of the embodiments, each of the temperature detection devices is evenly arranged on the charging surface of the power supply device body.

[0038] In one of the embodiments, it also includes an information interaction device arranged on the power supply device body.

[0039] In a second aspect, the present application further provides a charged device, which is used to receive electric energy provided by a power supply device through a wireless charging method, wherein the charged device includes a charged device body and two or more temperature detection devices;

[0040] Each of the temperature detection devices is arranged on the charging surface of the charged device body, and is used to collect temperature field data and send it to the charged device body during the charging process of the charged device;

[0041] The charged device body is used to execute the above method.

[0042] In one embodiment, each of the temperature detection devices is evenly arranged on the charging surface of the charged device body.

[0043] In one of the embodiments, it also includes an information interaction device arranged on the body of the charged device.

[0044] The above-mentioned wireless charging device control method, power supply device and charged device, the wireless charging device includes a power supply device and a charged device, the power supply device charges the charged device by wireless charging, and in the process of charging the wireless charging device, temperature field data is obtained; the temperature field data includes temperature data corresponding to multiple positions of the charging surface, the charging surface is the side where the power supply device and the charged device are close to each other during charging; determine whether there is a sudden change in temperature based on the temperature field data; if there is, control the wireless charging device to reduce the charging power. By detecting the temperature of multiple positions on the charging surface during charging, the obtained temperature data are combined to obtain temperature field data, and by analyzing the temperature field data, it is determined whether there is a sudden change in temperature. If there is, the wireless charging device is controlled to reduce the charging power, thereby reducing the damage that foreign matter may cause to the wireless charging device when continuing high-power charging, and improving the working reliability of the wireless charging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions 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 related drawings can be obtained based on these drawings without paying creative work.

[0046] FIG1 is a schematic flow chart of a method for controlling a wireless charging device in one embodiment;

[0047] FIG2 is a schematic diagram of the temperature sampling point distribution of the charging surface in one embodiment;

[0048] FIG3 is a schematic flow chart of a method for controlling a wireless charging device in another embodiment;

[0049] FIG4 is a schematic diagram of a process for determining whether there is a sudden temperature change according to temperature field data in one embodiment;

[0050] FIG5 is a schematic flow chart of a step of determining whether there is a sudden temperature change according to temperature field data in another embodiment;

[0051] FIG6 is a schematic flow chart of a method for controlling a wireless charging device in another embodiment;

[0052] FIG7 is a flow chart of a step of controlling a wireless charging device to reduce charging power according to a minimum value of maximum temperature data and comparison temperature data in one embodiment;

[0053] FIG8 is a schematic flow chart of a step of determining whether there is a sudden temperature change according to temperature field data in one embodiment;

[0054] FIG9 is a schematic diagram of the structure of a wireless charging device in one embodiment;

[0055] FIG10 is a top view of a charging base in one embodiment;

[0056] FIG. 11 is a schematic diagram of a distorted temperature field in an embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] The wireless charging device control method provided in the embodiment of the present application is used to control the wireless charging device. The wireless charging device includes a power supply device and a charged device, and the power supply device charges the charged device by wireless charging. The power supply device is the power provider, and the charged device is the power receiver. When the power supply device wirelessly charges the charged device, the two devices approach each other, and after they are close to each other or in contact, charging is performed based on the principle of electromagnetic induction.

[0059] Wireless charging devices refer to all devices that are charged by wireless charging. Generally, the device being charged is the power user, which can be various electrical appliances. The power supply device is the device that charges the device being powered, which can be a charging stand, etc. For example, the wireless charging device can be a beauty instrument, an electric toothbrush, a fan, or a mobile phone.

[0060] Since wireless charging charges the battery of the device being charged by generating electric potential changes through changes in the magnetic field, conductors can theoretically generate a certain electric potential. If there is a conductive foreign object at the charging position during the charging process, the foreign object will generate an electric potential under the action of the magnetic field. Since no loop is formed, the energy accumulated in the foreign object will be converted into heat energy and released, causing damage to the wireless charging device and may even affect the normal operation of the wireless charging device. Based on this, the inventors have proposed a wireless charging device control method, power supply device and charged device, which can solve the above problems and improve the working reliability of wireless charging.

[0061] Exemplarily, the wireless charging device control method can be executed by the power supply device. The power supply device includes a power supply device body and more than two temperature detection devices. The wireless charging device control method can be executed by a controller in the power supply device body, and the controller is connected to each temperature detection device. Alternatively, the wireless charging device control method can be executed by the charged device. The charged device includes a charged device body and more than two temperature detection devices. The wireless charging device control method can be executed by a controller in the charged device body, and the controller is connected to each temperature detection device. For the convenience of explanation, the following takes the example of the wireless charging device control method being executed by the controller. It can be understood that the controller here can be a controller in the power supply device body or a controller in the charged device body.

[0062] In one embodiment, as shown in FIG. 1 , the wireless charging device control method includes steps 102 to 106 .

[0063] Step 102: Acquire temperature field data during charging of the wireless charging device.

[0064] The temperature field data includes temperature data corresponding to multiple positions of the charging surface, that is, one temperature field data includes multiple temperature data, and different temperature data represent the temperature of different positions of the charging surface.

[0065] The charging surface is the side where the power supply device and the charged device are close to each other during charging. That is, the charging surface can be a surface on the power supply device, specifically the side of the power supply device closest to the charged device during charging, or the side in contact with the charged device. Alternatively, the charging surface can be a surface on the charged device, specifically the side of the charged device closest to the power supply device during charging, or the side in contact with the power supply device. Exemplarily, if the power supply device is a charging base, and the charged device is a handheld micro-capacitor beauty instrument, when charging, the handheld micro-capacitor beauty instrument is placed on the charging base for charging, then the charging surface can be the upper surface of the charging base (i.e., away from the ground and close to the side of the handheld micro-capacitor beauty instrument), or the charging surface can also be the bottom surface of the handheld micro-capacitor beauty instrument (i.e., close to the ground and close to the side of the charging base).

[0066] There is not only one way to obtain temperature field data. For example, a temperature detection device can detect multiple temperature data of the charging surface and send them to the controller, so that the controller can obtain the temperature field data. There are multiple temperature detection devices, which are respectively set at multiple positions on the charging surface to detect the temperature at multiple positions on the charging surface and obtain temperature data. Each temperature detection device is connected to the controller and sends the detected temperature data to the controller for subsequent processing.

[0067] Furthermore, each temperature detection device can be evenly arranged on the charging surface, that is, the distance between two adjacent temperature detection devices is equal or approximately equal, so that a relatively evenly distributed temperature sampling point can be obtained, thereby improving the accuracy of the analysis results obtained by subsequent analysis based on the temperature field data. Exemplarily, each temperature detection device can be arranged in a circular distribution with a certain temperature detection device as the center, and other temperature detection devices are arranged in a circular distribution with different radii, as shown in Figure 2. Alternatively, each temperature detection device can be distributed in a rectangular nested manner of different sizes. It can be understood that in other embodiments, the arrangement of each temperature detection device can also be other, which is not limited here.

[0068] Step 104: determine whether there is a sudden temperature change according to the temperature field data.

[0069] If there is a foreign object on the charging surface, the foreign object may also induce an electromotive force under the action of electromagnetic induction, and the temperature will rise. Therefore, the temperature field data can be used as a basis for judging whether there is a foreign object on the charging surface, and combined with subsequent steps, the wireless charging device can be controlled to improve the working performance of the wireless charging device.

[0070] Temperature mutation refers to an abnormal situation in which a certain temperature data or a certain part of temperature data is different from other temperature data. The temperature field data is analyzed, specifically, multiple temperature data in the temperature field data are analyzed, and whether there is a temperature mutation is determined based on the analysis results. Exemplarily, multiple temperature data in a temperature field data can be compared to determine whether there is a temperature mutation; or, multiple temperature field data can be compared to determine whether there is a temperature mutation. Alternatively, multiple temperature data in a temperature field data and multiple temperature field data can be combined to determine whether there is a temperature mutation, etc. The specific method is not limited here.

[0071] Step 106: If yes, control the wireless charging device to reduce the charging power.

[0072] If there is a sudden change in temperature, it indicates that there is a temperature abnormality on the charging surface. In this case, the wireless charging device is controlled to reduce the charging power to reduce the heat generated by the foreign objects on the charging surface, reduce the impact of the heat generated by the foreign objects on the wireless charging device, and facilitate the normal operation of the wireless charging device.

[0073] In this embodiment, the wireless charging device includes a power supply device and a charged device. The power supply device charges the charged device by wireless charging. During the charging process of the wireless charging device, temperature field data is obtained; the temperature field data includes temperature data corresponding to multiple positions of the charging surface, and the charging surface is the surface where the power supply device and the charged device are close to each other during charging; whether there is a temperature mutation is determined based on the temperature field data; if there is, the wireless charging device is controlled to reduce the charging power. By detecting the temperature of multiple positions of the charging surface during charging, the obtained temperature data are combined to obtain the temperature field data, and by analyzing the temperature field data, it is determined whether there is a temperature mutation. If there is, the wireless charging device is controlled to reduce the charging power, thereby reducing the damage that foreign matter may cause to the wireless charging device when continuing high-power charging, and improving the working reliability of the wireless charging device.

[0074] Furthermore, as shown in FIG. 3 , in one embodiment, the wireless charging device control method further includes step 308 : if it is determined that there is a sudden temperature change, issuing a prompt message.

[0075] If there is a sudden change in temperature, it indicates that there is a location with abnormal temperature on the charging surface. In this case, the controller sends a prompt message to remind the user to check the charging surface in time and deal with foreign objects on the charging surface. Specifically, the controller is connected to the information interaction device, and the controller can send a prompt message to the information interaction device. After receiving the prompt message, the information interaction device prompts, so that the user can know the sudden change in temperature of the charging surface in time.

[0076] In an extensible manner, the information interaction device can also receive instructions sent by the user, and send the instructions sent by the user to the controller, so that the controller works according to the instructions sent by the user, so that the operation of the wireless charging device can better meet the needs of the user. The types of information interaction devices are not limited. For example, the information interaction device can be a touch screen, an indicator light, a voice device, etc.

[0077] In this embodiment, when it is determined that there is a sudden temperature change, a prompt message is issued to remind the user to deal with foreign objects on the charging surface in a timely manner, thereby reducing the impact of foreign objects on the wireless charging device, which is conducive to the normal operation of the wireless charging device.

[0078] In one embodiment, as shown in FIG. 4 , step 104 includes step 402 and step 404 .

[0079] Step 402, determining a sampled temperature difference value in temperature field data.

[0080] The sampled temperature difference value is the difference between the temperature data of two adjacent positions on the charging surface.

[0081] After obtaining a temperature field data, each temperature data in the temperature field data is analyzed. Specifically, the temperature data corresponding to two adjacent positions are analyzed to obtain a temperature difference value. The temperature data corresponding to two adjacent positions in a temperature field data are analyzed to obtain multiple difference values ​​as sampling temperature difference values. Among them, the difference value can be a difference value or a ratio, etc., as long as it can characterize the difference between the two data, and it is not limited here.

[0082] Exemplarily, a temperature field data is represented by Qn, and the sampling temperature difference value in the temperature field data can be determined by comparing the difference of the temperature data between the sampling points in Qn (a sampling point is compared with the sampling points around it, refer to Figure 2, such as: T1 is compared with T2, T3, T4, T5, T2 is compared with T6, T7, T3, T5, T13, and so on, to obtain multiple sampling temperature difference values.

[0083] Step 404: If there is a sampled temperature difference value exceeding the first preset temperature, it is determined that there is a sudden temperature change.

[0084] The specific value of the first preset temperature can be determined according to actual needs and is used to define a reasonable range of temperature. For example, the first preset temperature can be 5° C. It can be understood that in other embodiments, the specific value of the first preset temperature can also be other, which is not limited here.

[0085] The one or more sampled temperature difference values ​​obtained in step 402 are compared with the first preset temperature. After the comparison, if it is determined that there is a sampled temperature difference value exceeding the first preset temperature, and the difference between the two temperature data for obtaining the sampled temperature difference value is large, it can be determined that there is a temperature mutation.

[0086] In this embodiment, a sampled temperature difference value in a temperature field data is determined, and if there is a sampled temperature difference value exceeding the first preset temperature, it is determined that there is a temperature mutation. By analyzing the temperature data in a temperature field data to determine whether there is a temperature mutation, the location of the temperature anomaly can be discovered in time, which is convenient for timely discovery of foreign objects on the charging surface.

[0087] In one embodiment, as shown in FIG. 5 , after step 402 , the wireless charging device control method further includes steps 502 to 506 .

[0088] Step 502: If there is no sampled temperature difference value exceeding the first preset temperature, obtain the temperature mean value of the current temperature field data.

[0089] The one or more sampled temperature difference values ​​obtained in step 402 are compared with the first preset temperature. After the comparison, if it is determined that there is no sampled temperature difference value exceeding the first preset temperature, it indicates that the difference values ​​between the temperature data in the temperature field data are within a reasonable range. In this case, further comparison of different temperature field data is performed to determine whether there is a temperature mutation.

[0090] Exemplarily, in this step, if there is no sampling temperature difference value exceeding the first preset temperature, each temperature data contained in the current temperature field data is analyzed, and the average value of each temperature data contained in the current temperature field data is calculated to obtain the temperature mean of the current temperature field data.

[0091] Step 504, obtaining the temperature mean of the basic temperature field data.

[0092] Among them, the basic temperature field data is the temperature field data collected before the current temperature field data is collected. After the wireless charging device starts charging, the controller will obtain multiple temperature field data according to the preset sampling period and sampling frequency, or the controller can also obtain multiple temperature field data according to user instructions. After obtaining the temperature mean of the current temperature field data, the controller analyzes the temperature field data collected before the current temperature field data is collected, calculates the average value of each temperature data contained in the basic temperature field data, and obtains the temperature mean of the basic temperature field data.

[0093] In an extensible manner, when the wireless charging device starts charging, each temperature detection device will collect temperature data at each position of the primary charging surface to obtain T1(1), T2(1)...Tn(1). These temperature data together constitute the temperature field data Q1 at the start of work, that is, the initial temperature field data. The initial temperature field data can also be used as basic temperature field data. Since the initial temperature field data is obtained when charging is just started, it is less subject to interference factors, and the data obtained is relatively more accurate.

[0094] Step 506: Determine whether there is a sudden temperature change according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

[0095] After obtaining the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data, the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data may be analyzed to determine whether there is a sudden temperature change.

[0096] The method of determining whether there is a temperature mutation based on the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data is not the only one. For example, when the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data is large, it can be determined that there is a temperature mutation.

[0097] In this embodiment, if there is no sampled temperature difference value exceeding the first preset temperature, the temperature mean of the current temperature field data is obtained, the temperature mean of the basic temperature field data is obtained, and whether there is a temperature mutation is determined based on the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data. In the case that there is no sampled temperature difference value exceeding the first preset temperature, different temperature field data are further compared to determine whether there is a temperature mutation, thereby improving the accuracy of the temperature mutation judgment result.

[0098] Exemplarily, in one embodiment, step 506 includes the step of: if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a second preset temperature, determining that a sudden temperature change exists.

[0099] Among them, the specific value of the second preset temperature can be determined according to actual needs, and is used to characterize the reasonable range of the temperature field difference. Exemplarily, the second preset temperature can be 30°C. It can be understood that in other embodiments, the specific value of the second preset temperature can also be other, which is not limited here. In addition, the difference value can be a difference or a ratio, etc., as long as it can characterize the difference between the two data, which is not limited here.

[0100] The temperature mean of the current temperature field data obtained in step 502 is compared with the temperature mean of the basic temperature field data obtained in step 504. After comparison, if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds the second preset temperature and the temperature mean of the two temperature field data differs greatly, it can be determined that there is a temperature mutation.

[0101] In this embodiment, if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds the second preset temperature, it is determined that there is a temperature mutation. By comparing the temperature mean values ​​of different temperature field data to determine whether there is a temperature mutation, the change in the overall temperature can be used to determine whether there is a temperature mutation, thereby improving the accuracy of the judgment result.

[0102] In an embodiment, step 506 further includes the step of: if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data does not exceed the second preset temperature, determining that there is no temperature mutation.

[0103] Specifically, if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data does not exceed the second preset temperature, the difference between the temperature mean of the two temperature field data is still within a reasonable range. In addition, if there is no sampling temperature difference value exceeding the first preset temperature, it can be determined that there is no temperature mutation. By determining that there is no temperature mutation through dual judgment conditions, the occurrence of false detection and missed detection can be reduced under certain circumstances.

[0104] Exemplarily, in one embodiment, as shown in FIG6 , after step 404, step 106 includes steps 602 to 606:

[0105] Step 602: Acquire the highest temperature data corresponding to the sampled temperature difference value exceeding the first preset temperature.

[0106] The sampled temperature difference value exceeding the first preset temperature corresponds to two temperature data, the sampled temperature difference value is obtained from the two temperature data, and the larger of the two temperature data is used as the highest temperature data.

[0107] Step 604, obtaining the minimum value of the comparison temperature data.

[0108] The comparative temperature data is the temperature data corresponding to each position adjacent to the position corresponding to the highest temperature data. It can be understood that one highest temperature data may correspond to one comparative temperature data or multiple comparative temperature data, which is determined according to the position corresponding to the highest temperature data.

[0109] After obtaining the highest temperature data, further analyze the temperature field situation centered on the position corresponding to the highest temperature data. Exemplarily, after obtaining the temperature data corresponding to each position adjacent to the position corresponding to the highest temperature data, compare each temperature data and obtain the minimum temperature data as the minimum value of the compared temperature data.

[0110] Step 606: Control the wireless charging device to reduce the charging power according to the minimum value of the maximum temperature data and the comparison temperature data.

[0111] After obtaining the minimum value of the maximum temperature data and the comparison temperature data, the minimum value of the maximum temperature data and the comparison temperature data may be analyzed, and the wireless charging device may be controlled to reduce the charging power according to the analysis result.

[0112] The method of controlling the wireless charging device to reduce the charging power according to the minimum value of the maximum temperature data and the comparison temperature data is not the only one. For example, when the difference between the maximum temperature data and the minimum value of the comparison temperature data is large, the wireless charging device can be controlled to reduce the charging power.

[0113] In an extensible manner, if there are two or more sampled temperature difference values ​​exceeding the first preset temperature, then based on each sampled temperature difference value exceeding the first preset temperature, steps 602 to 604 are performed once, and after obtaining multiple maximum temperature data corresponding to each sampled temperature difference value exceeding the first preset temperature and the minimum value of the comparison temperature data, the wireless charging device is controlled to reduce the charging power according to the minimum value of each group of maximum temperature data and the comparison temperature data. Exemplarily, the difference value of multiple maximum temperature data and the minimum value of the comparison temperature data can be obtained according to the minimum value of each group of maximum temperature data and the comparison temperature data, and then based on the distribution interval of the difference value, the wireless charging device is controlled to reduce the charging power according to the interval with the most difference values.

[0114] In this embodiment, the maximum temperature data corresponding to the sampled temperature difference value exceeding the first preset temperature is obtained, the minimum value of the comparison temperature data is obtained, and the wireless charging device is controlled to reduce the charging power according to the maximum temperature data and the minimum value of the comparison temperature data. Therefore, the wireless charging device is controlled according to the maximum temperature data and the comparison temperature data, which can improve the accuracy of the control.

[0115] Further, in one embodiment, as shown in FIG. 7 , step 606 includes step 702 and step 704 .

[0116] Step 702: If the difference between the maximum temperature data and the minimum value of the comparison temperature data does not exceed the third preset temperature, control the wireless charging device to reduce the charging power.

[0117] Among them, the specific value of the third preset temperature can be determined according to actual needs, and is used to characterize the reasonable range of the difference in temperature data of adjacent positions. Exemplarily, the third preset temperature can be 20°C. It can be understood that in other embodiments, the specific value of the third preset temperature can also be other, which is not limited here. In addition, the difference value can be a difference or a ratio, etc., as long as it can characterize the difference between the two data, which is not limited here.

[0118] If the difference between the maximum temperature data and the minimum value of the comparison temperature data does not exceed the third preset temperature, indicating that the difference between the maximum temperature data and the minimum value of the comparison temperature data is not too large, and there may be foreign matter on the charging surface, the wireless charging device is controlled to reduce the charging power and reduce the heating rate.

[0119] Step 704: If the difference between the maximum temperature data and the minimum value of the comparison temperature data exceeds a third preset temperature, the wireless charging device is controlled to stop charging.

[0120] If the difference between the maximum temperature data and the minimum value of the comparison temperature data exceeds the third preset temperature, indicating that the difference between the maximum temperature data and the minimum value of the comparison temperature data is obvious and there is foreign matter on the charging surface, the wireless charging device is controlled to stop charging and stop generating heat to prevent the wireless charging device from being damaged by heat from foreign matter.

[0121] In addition, when determining whether there is a sudden change in temperature, it can also be determined based on different temperature field data. Exemplarily, in one embodiment, as shown in FIG8 , step 104 includes steps 802 to 806 .

[0122] Step 802, obtaining the temperature mean value of the current temperature field data.

[0123] The various temperature data included in the current temperature field data are analyzed, and the average value of the various temperature data included in the current temperature field data is calculated to obtain the temperature mean value of the current temperature field data.

[0124] Step 804, obtaining the temperature mean of the basic temperature field data.

[0125] Among them, the basic temperature field data is the temperature field data collected before the current temperature field data is collected. After the wireless charging device starts charging, the controller will obtain multiple temperature field data according to the preset sampling period and sampling frequency, or the controller can also obtain multiple temperature field data according to user instructions. After obtaining the temperature mean of the current temperature field data, the controller analyzes the temperature field data collected before the current temperature field data is collected, calculates the average value of each temperature data contained in the basic temperature field data, and obtains the temperature mean of the basic temperature field data.

[0126] In an extensible manner, when the wireless charging device starts charging, each temperature detection device will collect temperature data at each position of the primary charging surface to obtain T1(1), T2(1)...Tn(1). These temperature data together constitute the temperature field data Q1 at the start of work, that is, the initial temperature field data. The initial temperature field data can also be used as basic temperature field data. Since the initial temperature field data is obtained when charging is just started, it is less subject to interference factors, and the data obtained is relatively more accurate.

[0127] Step 806 , determining whether there is a sudden temperature change according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

[0128] After obtaining the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data, the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data may be analyzed to determine whether there is a sudden temperature change.

[0129] The method of determining whether there is a temperature mutation based on the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data is not the only one. For example, when the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data is large, it can be determined that there is a temperature mutation.

[0130] In this embodiment, the temperature mean of the current temperature field data is obtained, the temperature mean of the basic temperature field data is obtained, and whether there is a temperature mutation is determined based on the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data. By judging whether there is a temperature mutation based on different temperature field data, the detection error caused by individual positions is reduced, and the accuracy of the temperature mutation judgment result is improved.

[0131] Further, in one embodiment, step 806 includes the step of: if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a fourth preset temperature, determining that a temperature mutation exists.

[0132] Among them, the specific value of the fourth preset temperature can be determined according to actual needs, and is used to characterize the reasonable range of the temperature field difference. The fourth preset temperature can be greater than or equal to the second preset temperature. For example, the fourth preset temperature can be 35°C. It can be understood that in other embodiments, the specific value of the fourth preset temperature can also be other, which is not limited here. In addition, the difference value can be a difference or a ratio, etc., as long as it can characterize the difference between the two data, which is not limited here.

[0133] If the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds the fourth preset temperature, indicating that the temperature mean of the two temperature field data differ greatly, it can be determined that a temperature mutation exists.

[0134] In this embodiment, if the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds the fourth preset temperature, it is determined that there is a temperature mutation. By comparing the temperature mean values ​​of different temperature field data to determine whether there is a temperature mutation, the change in the overall temperature can be used to determine whether there is a temperature mutation, thereby improving the accuracy of the judgment result.

[0135] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0136] In one embodiment, a power supply device is provided, which is used to charge a charged device by wireless charging. The power supply device includes a power supply device body and two or more temperature detection devices, each of which is arranged on the charging surface of the power supply device body, and is used to collect temperature field data and send it to the power supply device body during the charging process of the power supply device body. The power supply device body is used to execute the wireless charging device control method of any of the above embodiments. Exemplarily, the wireless charging device control method of any of the above embodiments can be executed by a controller of the power supply device body.

[0137] In one embodiment, each temperature detection device is evenly arranged on the charging surface of the power supply device body. That is, the distance between two adjacent temperature detection devices is equal or approximately equal, and a relatively evenly distributed temperature sampling point can be obtained, thereby improving the accuracy of the analysis results obtained by subsequent analysis based on the temperature field data. Exemplarily, each temperature detection device can be arranged in a circular distribution with a certain temperature detection device as the center, and other temperature detection devices are arranged in a circular distribution with different radii, as shown in Figure 2. Alternatively, each temperature detection device can be distributed in a rectangular nested manner of different sizes. It can be understood that in other embodiments, the arrangement of each temperature detection device can also be other, which is not limited here.

[0138] In one embodiment, the power supply device further includes an information interaction device disposed on the power supply device body. The information interaction device can be connected to a controller of the power supply device body. Specifically, the information interaction device prompts after receiving the prompt information, so that the user can be informed of the sudden change in temperature of the charging surface in a timely manner.

[0139] In an extensible manner, the information interaction device can also receive instructions sent by the user, and send the instructions sent by the user to the controller of the power supply device body, so that the controller works according to the instructions sent by the user, so that the power supply device can better meet the user's needs. The type of information interaction device is not limited. For example, the information interaction device can be a touch screen, an indicator light, a voice device, etc.

[0140] In this embodiment, the power supply device further includes an information interaction device disposed on the power supply device body. The information interaction device can provide information prompts to facilitate the user to monitor the working status of the power supply device.

[0141] In one embodiment, a charged device is provided, which is used to receive electric energy provided by a power supply device through wireless charging. The charged device includes a charged device body and two or more temperature detection devices; each temperature detection device is arranged on the charging surface of the charged device body, and is used to collect temperature field data and send it to the charged device body during the charging process of the charged device; the charged device body is used to execute the wireless charging device control method of any of the above embodiments. Exemplarily, the wireless charging device control method of any of the above embodiments can be executed by a controller of the charged device body.

[0142] In one embodiment, each temperature detection device is evenly arranged on the charging surface of the charged device body. That is, the distance between two adjacent temperature detection devices is equal or approximately equal, and a relatively evenly distributed temperature sampling point can be obtained, thereby improving the accuracy of the analysis results obtained by subsequent analysis based on the temperature field data. Exemplarily, each temperature detection device can be arranged in a circular distribution with a certain temperature detection device as the center, and other temperature detection devices are arranged in a circular distribution with different radii, as shown in Figure 2. Alternatively, each temperature detection device can be distributed in a rectangular nested manner of different sizes. It can be understood that in other embodiments, the arrangement of each temperature detection device can also be other, which is not limited here.

[0143] In one embodiment, the charged device further includes an information interaction device disposed on the body of the charged device. The information interaction device can be connected to a controller of the body of the charged device. Specifically, the information interaction device prompts after receiving the prompt information, so that the user can be informed of the sudden temperature change of the charging surface in a timely manner.

[0144] In an extensible manner, the information interaction device can also receive instructions sent by the user, and send the instructions sent by the user to the controller of the charged device body, so that the controller works according to the instructions sent by the user, so that the work of the charged device can better meet the user's needs. The type of information interaction device is not limited. For example, the information interaction device can be a touch screen, an indicator light, a voice device, etc.

[0145] In this embodiment, the charged device further includes an information interaction device disposed on the body of the charged device. The information interaction device can provide information prompts to facilitate the user to monitor the working status of the charged device.

[0146] In order to better understand the above embodiment, a detailed explanation is given below in combination with a specific embodiment. In one embodiment, the wireless charging device includes a power supply device and a charged device. The power supply device is a charging base and the charged device is a handheld micro-current beauty instrument. As shown in FIG9 , the handheld micro-current beauty instrument (hereinafter referred to as the beauty instrument) is mainly used for user handheld operation, and the charging base (hereinafter referred to as the base) is mainly used to place the beauty instrument and charge the beauty instrument. The temperature detection device is a temperature probe, and the temperature probes are all set on the charging base (see FIG10 for details). When the beauty instrument is placed in the base, the real-time temperature data of each temperature probe of the base is collected once. The data is used as the starting temperature data of the temperature field during charging. The real-time temperature field data is collected once every period of time during the charging period. If the obtained temperature field data is relatively uniform and the temperature values ​​are relatively close, it is considered that there is no foreign matter in the base. If the obtained temperature field data is distorted and exceeds the preset range (the distorted temperature field is similar to FIG11) or the average value of the new temperature field is much higher than the basic temperature field, it is considered that there is foreign matter in the base.

[0147] Specifically, temperature data Tn(n): represents the real-time temperature data detected by the temperature probe; temperature field Qn: represents the regional temperature distribution obtained by combining a set of data; temperature gradient: a synonym for temperature within a certain range. For example, the top yellow part in Figure 11 can be called the high temperature gradient, and the bottom blue part can be called the low temperature gradient.

[0148] Wireless charging devices work by:

[0149] 1. After the beauty instrument is placed in the base and confirmed to enter charging, the temperature probe in the base collects real-time temperature data once, and obtains T1(1), T2(1)...Tn(1). These temperature data together constitute the temperature field data Q1 when starting to work. This temperature field is the basic data for judging whether the temperature field change is normal in subsequent work. After determining the basic temperature field, the base starts to work and officially enters the charging stage.

[0150] 2. After charging starts, collect the temperature data of each probe at intervals to obtain T1(2), T2(2)...Tn(2). This set of data represents the situation of temperature field Q2. Similarly, temperature fields Q3, Q4...Qn can be obtained at intervals, and the data differences between the sampling points in Qn are compared (one sampling point is compared with the sampling points around it, such as: T1 is compared with T2, T3, T4, T5, T2 is compared with T6, T7, T3, T5, T13, and so on). When comparing the data differences between the sampling points in Qn, take one sampling point as the center of the circle and compare it with the sampling points around it. All sampling points in the base are compared with the surrounding sampling points in this way. If a comparison has been made between two sampling points, it will not be repeated in this comparison.

[0151] ① If the value difference between each point is within a reasonable range (for example, within 0-5°C), the temperature mean of the temperature field is compared with the basic temperature field. If the mean temperature difference is also within a reasonable range (for example, not exceeding 30°C), the temperature field is considered normal. If the mean temperature difference exceeds the reasonable range, it is considered that there may be an abnormality in the base, and the charging power needs to be reduced and the user is reminded;

[0152] ② If the difference between the data of one point and its surrounding sampling points exceeds the range, the temperature field situation centered on the point with high temperature when the difference is abnormal is further judged. If the temperature has a temperature field distortion trend similar to Figure 11, when the difference between the high temperature point (center point) and the low temperature point (the lowest temperature point) is not too large (the difference is within 20°C), it is considered that there may be an abnormality in the base, and the charging power needs to be reduced and the user needs to be reminded. When the difference between the high temperature point and the low temperature point is obvious (exceeding 20°C) (with the situation where the temperature of the high temperature area is obviously prominent in Figure 11), it is considered that there is a foreign object in the base, and charging needs to be stopped and the user needs to be reminded.

[0153] When the temperature field continues to meet the normal temperature field in point ①, the beauty instrument continues to charge until the product detects that the battery is full, and then ends the charging.

[0154] By setting a certain number of regularly arranged temperature probes on the base, the real-time temperature of each part of the base during charging is detected, and the obtained data are combined to obtain the temperature field data of the product base. By analyzing the temperature changes in the temperature field, it is determined whether there is a sudden temperature change in any area. When the temperature mutation meets certain conditions, it is considered that there may be foreign matter in the base. At this time, the charging power is reduced and the user is reminded to check the base, so as to reduce the impact of foreign matter in time and remind the user to clean up foreign matter in time, thereby improving the working reliability of the wireless charging device.

[0155] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0156] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0157] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A wireless charging device control method, characterized in that: The wireless charging device comprises a power supply device and a charged device, and the power supply device charges the charged device by wireless charging; The method comprises: During the charging process of the wireless charging device, temperature field data is obtained; the temperature field data includes temperature data corresponding to multiple positions of a charging surface, and the charging surface is a surface where the power supply device and the charged device are close to each other during charging; Determining whether there is a sudden temperature change according to the temperature field data; If so, control the wireless charging device to reduce the charging power.

2. The method according to claim 1, characterized in that Determining whether there is a sudden temperature change according to the temperature field data includes: Determine a sampled temperature difference value in the temperature field data; the sampled temperature difference value is a difference value of temperature data corresponding to two adjacent positions in the charging surface; If there is a sampled temperature difference value exceeding the first preset temperature, it is determined that there is a sudden temperature change.

3. The method according to claim 2, characterized in that After determining a sampled temperature difference value in the temperature field data, the method further includes: If there is no sampled temperature difference value exceeding the first preset temperature, obtaining the temperature mean value of the current temperature field data; Obtaining a temperature mean value of basic temperature field data; the basic temperature field data is temperature field data collected before collecting current temperature field data; It is determined whether there is a temperature mutation according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

4. The method according to claim 3, characterized in that The determining whether there is a temperature mutation according to the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data comprises: If the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a second preset temperature, it is determined that a sudden temperature change exists.

5. The method according to claim 2, characterized in that: If there is a sampled temperature difference value exceeding the first preset temperature, after determining that there is a temperature mutation, controlling the wireless charging device to reduce the charging power includes: Acquire the highest temperature data corresponding to the sampled temperature difference value exceeding the first preset temperature; Obtaining a minimum value of comparative temperature data; the comparative temperature data is temperature data corresponding to each position adjacent to the position corresponding to the highest temperature data; According to a minimum value between the maximum temperature data and the comparison temperature data, the wireless charging device is controlled to reduce charging power.

6. The method according to claim 5, characterized in that The controlling the wireless charging device to reduce the charging power according to the minimum value of the maximum temperature data and the comparison temperature data comprises: If the difference between the maximum temperature data and the minimum value of the comparison temperature data does not exceed a third preset temperature, controlling the wireless charging device to reduce the charging power; If the difference between the maximum temperature data and the minimum value of the comparison temperature data exceeds the third preset temperature, the wireless charging device is controlled to stop charging.

7. The method according to claim 1, characterized in that Determining whether there is a sudden temperature change according to the temperature field data includes: Get the mean temperature of the current temperature field data; Obtaining a temperature mean value of basic temperature field data; the basic temperature field data is temperature field data collected before collecting current temperature field data; It is determined whether there is a temperature mutation according to the temperature mean value of the current temperature field data and the temperature mean value of the basic temperature field data.

8. The method according to claim 7, characterized in that The determining whether there is a temperature mutation according to the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data comprises: If the difference between the temperature mean of the current temperature field data and the temperature mean of the basic temperature field data exceeds a fourth preset temperature, it is determined that a sudden temperature change exists.

9. The method according to any one of claims 1 to 8, characterized in that: The method further comprises: If it is determined that there is a sudden temperature change, a prompt message is issued.

10. A power supply device, characterized in that: Used to charge the charged device by wireless charging, the power supply device includes a power supply device body and more than two temperature detection devices; Each of the temperature detection devices is arranged on the charging surface of the power supply device body, and is used to collect temperature field data and send it to the power supply device body during the charging process of the power supply device body; The power supply device body is used to execute the method described in any one of claims 1-9.

11. The power supply device according to claim 10, characterized in that: Each of the temperature detection devices is evenly arranged on the charging surface of the power supply device body.

12. The power supply device according to claim 10, characterized in that: It also includes an information interaction device arranged on the power supply equipment body.

13. A charged device, characterized in that: Used to receive electric energy provided by a power supply device through wireless charging, wherein the charged device includes a charged device body and two or more temperature detection devices; Each of the temperature detection devices is arranged on the charging surface of the charged device body, and is used to collect temperature field data and send it to the charged device body during the charging process of the charged device; The charged device body is used to execute the method described in any one of claims 1-9.

14. The charged device according to claim 13, characterized in that: The temperature detection devices are evenly arranged on the charging surface of the charged device body.

15. The charged device according to claim 13, characterized in that: It also includes an information interaction device arranged on the body of the charged device.

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