Wireless charging method and device and storage medium

Abstract

The invention relates to a wireless charging method and device and a storage medium. The method comprises the following steps: acquiring the current power loss of a wireless charging transmitting end; if the current power loss does not meet the charging stopping condition, determining a target receiving power interval according to a corresponding relation between the receiving power interval and power compensation and the current power loss; and performing target power charging according to the target receiving power interval, wherein the target power is within the target receiving power interval and is smaller than the current receiving power. Therefore, power reduction charging can be performed according to the target receiving power interval to reduce the electromagnetic field intensity and avoid a high heat phenomenon caused by a small size of a metal foreign body or the metal foreign body is located in an electromagnetic field edge area, so that a user is prevented from being scalded, and the safety and reliability of wireless charging are improved. In addition, the wireless charging receiving end can be continuously charged, charging interruption is avoided, and the continuity of wireless charging is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless charging technology, and in particular to a wireless charging method, device and storage medium. Background Art

[0002] At present, for wireless charging solutions based on the principle of electromagnetic induction, foreign object detection (FOD) is required during the charging process to ensure safety. Since alternating electromagnetic induction will cause metal foreign objects (such as coins, metal sheets, bank card chips, etc.) in the electromagnetic field to produce eddy current effects, the metal foreign objects will heat up, which may pose a risk of scalding users and threaten charging safety.

[0003] In the related art, foreign object detection is performed during wireless charging, and charging is stopped when foreign objects are detected. However, when the metal foreign object is small in size or located at the edge of the electromagnetic field, it may not be possible to determine the presence of foreign objects in the electromagnetic field, and the power-off protection cannot be triggered. In this way, the metal foreign object may generate high heat, posing a risk of scalding the user and threatening the charging safety. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a wireless charging method, device and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a wireless charging method is provided, the method comprising:

[0006] Get the current power loss of the wireless charging transmitter;

[0007] If the current power loss does not meet the charging stop condition, determining a target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss;

[0008] Target power charging is performed according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

[0009] Optionally, determining the target receiving power interval according to the correspondence between the receiving power interval and the power compensation and the current power loss includes:

[0010] Determining a first target power compensation corresponding to the current power loss according to a correspondence between a received power interval and a power compensation;

[0011] The receiving power interval corresponding to the first target power compensation in the corresponding relationship is determined as the target receiving power interval.

[0012] Optionally, determining, according to a correspondence between a received power interval and a power compensation, a first target power compensation corresponding to the current power loss includes:

[0013] Determine, according to the correspondence between the received power interval and the power compensation, a second target power compensation corresponding to the received power interval in which the current received power is located;

[0014] A first target power compensation corresponding to the current power loss is determined according to the second target power compensation and the corresponding relationship.

[0015] Optionally, determining, according to the second target power compensation and the corresponding relationship, a first target power compensation corresponding to the current power loss includes:

[0016] According to the comparison result of the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss, the first target power compensation corresponding to the current power loss is determined, wherein the candidate power compensation is the power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the first target compensation corresponding to the candidate power compensation is the negative of the sum of the second target power compensation and the candidate power compensation.

[0017] Optionally, determining the first target power compensation corresponding to the current power loss according to a comparison result between the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss includes:

[0018] The candidate power compensation corresponding to the maximum compensation is determined as a first target power compensation corresponding to the current power loss, wherein the maximum compensation is a maximum value among the first target compensations that are not greater than the current power loss.

[0019] Optionally, determining, according to the second target power compensation and the corresponding relationship, a first target power compensation corresponding to the current power loss includes:

[0020] Determining whether a second target compensation corresponding to a third target power compensation is greater than the current power loss, wherein the third target power compensation is a minimum value in a power compensation set, the power compensation set initially includes each candidate power compensation in the corresponding relationship, the candidate power compensation is the power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the second target compensation is the inverse of the sum of the second target power compensation and the third target power compensation;

[0021] If the second target compensation is greater than the current power loss, the third target power compensation is removed from the power compensation set, and the process returns to the step of determining whether the second target compensation corresponding to the third target power compensation is greater than the current power loss until the number of candidate power compensations in the power compensation set is 1;

[0022] If the second target compensation is not greater than the current power loss, the third target power compensation is determined as the first target power compensation.

[0023] Optionally, the method is applied to the wireless charging transmitter;

[0024] The charging with target power according to the target received power interval includes:

[0025] According to the target receiving power interval, the charging parameters of the wireless charging transmitter are adjusted so that the transmission power of the wireless charging transmitter falls within the target receiving power interval, wherein the charging parameters include at least one of the charging voltage, the operating frequency of the transmitter inverter circuit, the duty cycle of the transmitter inverter circuit, and the phase of the transmitter inverter current.

[0026] Optionally, the method is applied to the wireless charging transmitter;

[0027] The charging with target power according to the target received power interval includes:

[0028] The target receiving power interval is sent to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval.

[0029] Optionally, the method is applied to the wireless charging transmitter;

[0030] The charging with target power according to the target received power interval includes:

[0031] In response to receiving an inquiry message sent by a wireless charging receiving end for inquiring whether to reduce the charging power, the target receiving power interval is sent to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval, wherein the wireless charging receiving end sends the inquiry message to the wireless charging transmitting end according to a preset period.

[0032] According to a second aspect of an embodiment of the present disclosure, a wireless charging device is provided, the device comprising:

[0033] An acquisition module is configured to acquire the power loss of the current wireless charging transmitter;

[0034] a determination module configured to determine a target receiving power interval according to a correspondence between a receiving power interval and power compensation and the current power loss if the current power loss does not satisfy a charging stop condition;

[0035] The charging module is configured to perform target power charging according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

[0036] According to a third aspect of an embodiment of the present disclosure, there is provided a wireless charging device, including:

[0037] processor;

[0038] a memory for storing processor-executable instructions;

[0039] Wherein, the processor is configured to:

[0040] Get the current power loss of the wireless charging transmitter;

[0041] If the current power loss does not meet the charging stop condition, determining a target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss;

[0042] Target power charging is performed according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

[0043] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the wireless charging method provided in the first aspect of the present disclosure are implemented.

[0044] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the current power loss of the wireless charging transmitter does not meet the condition for stopping charging, first determine the target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss; perform target power charging according to the target receiving power interval, wherein the target power is less than the current receiving power, so that reduced power charging can be achieved to reduce the electromagnetic field strength, avoid high heat caused by the small size of metal foreign matter or being located at the edge of the electromagnetic field, thereby avoiding burns to users and improving the safety and reliability of wireless charging. In addition, the wireless charging receiver can continue to be charged to avoid charging interruptions and improve the continuity of wireless charging.

[0045] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0047] Figure 1 The figure is a schematic diagram showing a wireless charging service scenario according to an exemplary embodiment.

[0048] Figure 2 The figure is a schematic diagram of a foreign object in a wireless charging system according to an exemplary embodiment.

[0049] Figure 3 The figure is a flow chart of a wireless charging method according to an exemplary embodiment.

[0050] Figure 4 The present invention is a schematic diagram showing a process of reducing charging power through a private transparent transmission method according to an exemplary embodiment.

[0051] Figure 5 The figure is a schematic diagram showing a process of reducing charging power by private packet polling according to an exemplary embodiment.

[0052] Figure 6 is a block diagram of a wireless charging device according to an exemplary embodiment.

[0053] Figure 7 It is a block diagram of a device for wireless charging according to an exemplary embodiment. DETAILED DESCRIPTION

[0054] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0055] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0056] The business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0057] Figure 1 1 is a schematic diagram showing a wireless charging service scenario according to an exemplary embodiment. The service scenario may include: a wireless charging transmitter 10, a wireless charging receiver 20, and a metal foreign body 30 located therebetween.

[0058] The wireless charging transmitter 10 refers to a device used to provide power to a power-consuming device in a wireless charging system. In different business scenarios, the name of the wireless charging transmitter 10 may be different. For example, when the wireless charging transmitter 10 is used to wirelessly charge a portable electronic device such as a mobile phone, a tablet computer, or a wearable device, the wireless charging transmitter 10 may be called a charger, a charging tray, a power adapter, a wireless charger, etc.

[0059] The wireless charging receiving end 20 refers to a device for receiving power in wireless charging, that is, a power-consuming device. The wireless charging receiving end 20 can be any power-consuming device that supports wireless charging, such as a mobile phone, a tablet computer, a wearable device, and other terminal devices, which is not limited in the embodiments of the present disclosure.

[0060] like Figure 2 As shown, metal foreign objects 30 such as coins, metal sheets, bank card chips, etc. may be located in any of area A, area B and area C on the wireless charging transmitting coil 101. When the metal foreign object 30 is located in area B or area C, it can be considered to be located in the edge area of ​​the electromagnetic field.

[0061] The technical solution provided by the embodiments of the present disclosure is applicable to scenarios of wireless charging of terminal devices such as mobile phones, tablet computers, wearable devices, etc.

[0062] The Qi charging protocol (a wireless charging standard developed by the Wireless Power Alliance) defines a method for detecting power loss. The wireless charging transmitter determines whether there is a metal foreign object in the electromagnetic field area based on the power loss. Taking into account some unpredictable factors, such as the influence of the wireless charging freedom, the power reported by the wireless charging receiver to the wireless charging transmitter under different loads will have a deviation offset. In order to prevent the wireless charging transmitter from falsely reporting foreign object detection, the power reported by the wireless charging receiver is usually Preceived = PRX + offset, where offset is used as power compensation for the above factors, and PRX is the received power of the wireless charging receiver. The wireless charging transmitter determines the power loss P according to the power loss P. Loss =P PT -Preceived to determine whether there is a metal foreign body in the electromagnetic field area to determine whether to trigger the charging protection. PT is the transmission power; when P LossWhen ≥a, it indicates that there is a metal foreign object in the electromagnetic field area, and the wireless charging transmitter stops wireless charging, where a is a preset power threshold greater than or equal to 0.

[0063] In actual applications, the maximum 15W wireless charging power defined by Qi is slow to charge and cannot meet the needs of mobile phones and other terminals for fast charging. The power needs to be expanded to 50W or higher. With higher power, the difficulty of foreign object detection also increases. Figure 2 As shown, when the metal foreign body is in area A, the power consumed by the metal foreign body is large, and the above power loss detection method can detect the foreign body in time and trigger a power-off protection. However, when the metal foreign body is in area B or area C, that is, the metal foreign body is at the edge of the electromagnetic field, or the metal foreign body is small in size, since the power consumed by the metal foreign body is small, it is difficult for the power loss detection method to determine the presence of the metal foreign body, and it is impossible to trigger the power-off protection. The high-power electromagnetic field intensity is sufficient to heat the metal foreign body in area B or area C to a high temperature, which poses a risk of scalding the user and poses a threat to charging safety.

[0064] In view of this, the present disclosure provides a wireless charging method, device and storage medium.

[0065] Figure 3 is a flow chart of a wireless charging method according to an exemplary embodiment. The wireless charging method can be applied to a wireless charging transmitter, for example, Figure 1 The wireless charging transmitter 10 shown in FIG. Figure 3 As shown, the wireless charging method may include the following S301 to S303.

[0066] In S301, the current power loss of the wireless charging transmitter is obtained.

[0067] During the wireless charging process, the wireless charging receiver can obtain the received power PRX, and then report the sum of the received power PRX and the corresponding offset (i.e., Preceived) to the wireless charging transmitter. The wireless charging transmitter sends the received power PRX to the wireless charging transmitter according to the transmitted power PRX. PT The difference between the power reported by the wireless charging receiver and the power Preceived can be used to calculate the power loss P Loss For example, the wireless charging transmitter uses a transmission power of P PT When charging the power receiving device, if the Preceived signal from the wireless charging receiving end is received, the transmit power P is calculated. PT The difference between the current power loss and the Preceived value is the current power loss. Compared with the case without foreign matter, the power loss is greater when there is foreign matter.

[0068] In S302, if the current power loss does not meet the charging stop condition, a target receiving power interval is determined according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss.

[0069] In the present disclosure, a correspondence between a receiving power interval and power compensation can be pre-established. In this correspondence, the upper limit value of the receiving power interval is positively correlated with the power compensation, that is, the larger the upper limit value of the receiving power interval, the greater the impact of the above-mentioned unpredictable factors on the receiving power, and therefore, the greater the power compensation corresponding to the receiving power interval.

[0070] For example, the corresponding relationship between the receiving power interval and the power compensation offset is shown in the following Table 1:

[0071] Table 1 Correspondence between receiving power interval and power compensation offset

[0072] Receive power range (W) Power compensation offset (mW) [0,5] offset1 (5，10] offset2 (10，15] offset3 (15，20] offset4 (20，25] offset5 (25，30] offset6 (30，35] offset7 (35，40] offset8 (40，45] offset9 (45，50] offset10

[0073] Among them, offset10>offset9>offset8>offset7>offset6>offset5>offset4>offset3>offset2>offset1.

[0074] In this correspondence, the power compensation value corresponding to the receiving power interval to which the receiving power of the wireless charging receiving end belongs is the offset value added to the receiving power when the wireless charging receiving end reports the power to the wireless charging transmitting end. For example, the current receiving power of the wireless charging receiving end is 21W, which belongs to the receiving power interval (20, 25] in Table 1 above. The power compensation value corresponding to the receiving power interval (20, 25] is offset5, and the power reported by the wireless charging receiving end to the wireless charging transmitting end is Preceived = 21W + offset5.

[0075] If the current power loss is greater than or equal to the above-mentioned preset power threshold a, it is determined that the current power loss meets the condition for stopping charging, that is, it is determined that there is a metal foreign body in the electromagnetic field area. At this time, charging can be stopped to avoid the risk of scalding the user due to high heat generated by the metal foreign body. If the current power loss is less than the above-mentioned preset power threshold a, it is determined that the current power loss does not meet the condition for stopping charging. At this time, it is impossible to determine whether there is a metal foreign body in the electromagnetic field area. At this time, in order to avoid the high heat phenomenon caused by the small size of the metal foreign body or the location at the edge of the electromagnetic field, the target receiving power interval corresponding to the current power loss can be determined from each receiving power interval in the above-mentioned corresponding relationship, so as to reduce the power charging according to the target receiving power interval to reduce the electromagnetic field strength.

[0076] In S303, target power charging is performed according to the target received power interval.

[0077] In the present disclosure, the target power falls within the target received power interval and is less than the current received power, that is, the target power for reduced-power charging is determined according to the target received power interval.

[0078] For example, the target power may be a lower limit value of the target receiving power interval, or an upper limit value of the target receiving power interval and an average of the upper limit values, which is not specifically limited in the present disclosure.

[0079] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the current power loss of the wireless charging transmitter does not meet the condition for stopping charging, first determine the target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss; perform target power charging according to the target receiving power interval, wherein the target power is less than the current receiving power, so that reduced power charging can be achieved to reduce the electromagnetic field strength, avoid high heat caused by the small size of metal foreign matter or being located at the edge of the electromagnetic field, thereby avoiding burns to users and improving the safety and reliability of wireless charging. In addition, the wireless charging receiver can continue to be charged to avoid charging interruptions and improve the continuity of wireless charging.

[0080] The following is a detailed description of the specific implementation method of determining the target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss in the above S302. Specifically, it can be achieved by the following steps (1) and (2):

[0081] Step (1): Determine a first target power compensation corresponding to the current power loss according to the corresponding relationship between the received power interval and the power compensation.

[0082] Step (2): Determine the receiving power interval corresponding to the first target power compensation in the corresponding relationship between the receiving power interval and the power compensation as the target receiving power interval.

[0083] In the present disclosure, the first target power compensation corresponding to the current power loss can be first determined from each power compensation in the above correspondence relationship; then, the receiving power interval corresponding to the first target power compensation in the corresponding relationship is determined as the target receiving power interval.

[0084] In one implementation, the first target power compensation corresponding to the current power loss may be determined through the following steps (11) and (12) according to the corresponding relationship between the received power interval and the power compensation:

[0085] Step (11): According to the correspondence between the receiving power interval and the power compensation, determine the second target power compensation corresponding to the receiving power interval where the current receiving power is located.

[0086] In the present disclosure, a second target power compensation corresponding to the receiving power interval in which the current receiving power is located can be determined from the power compensation in the above-mentioned corresponding relationship.

[0087] Step (12): Determine the first target power compensation corresponding to the current power loss according to the second target power compensation and the corresponding relationship.

[0088] In the present disclosure, the first target power compensation corresponding to the current power loss can be determined in a variety of ways based on the second target power compensation and the corresponding relationship. In one embodiment, the first target power compensation corresponding to the current power loss can be determined based on the comparison result between the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss, wherein the candidate power compensation is a power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the first target compensation corresponding to the candidate power compensation is the inverse of the sum of the second target power compensation and the candidate power compensation.

[0089] Specifically, the candidate power compensation corresponding to the maximum compensation can be determined as the first target power compensation corresponding to the current power loss, wherein the maximum compensation is the maximum value of the first target compensations that are not greater than the current power loss. If all first target compensations are greater than the current power loss, it indicates that there is no first target power compensation corresponding to the current power loss, and accordingly, there is no target receiving power interval corresponding to the current power loss, indicating that the power reduction charging condition is not met. At this time, the original charging power can be maintained for charging.

[0090] For example, the current receiving power of the wireless charging receiving end is 21W, which belongs to the receiving power interval (20, 25] in Table 1 above. The power compensation value corresponding to the receiving power interval (20, 25] is offset5, that is, the second target power compensation is offset5. Accordingly, the above correspondence includes five candidate power compensations, namely offset1, offset2, offset3, offset4 and offset5. For each candidate power compensation in Table 1 above, the first target compensation corresponding to the candidate power compensation can be determined, that is, -(offseti+offset5), where offseti is the i-th candidate power compensation in Table 1, i≤5; then, each first target compensation is compared with the current power loss, and the following comparison results are obtained: the first target compensation "-(offset1+offset5)" corresponding to the candidate power compensation offset1 is greater than the current P Loss, the first target compensation "-(offset2+offset5)" corresponding to the candidate power compensation offset2 is greater than the current P Loss , the first target compensation "-(offset3+offset5)" corresponding to the candidate power compensation offset3 is less than the current P Loss , the first target compensation "-(offset4+offset5)" corresponding to the candidate power compensation offset4 is less than the current P Loss , the first target compensation "-(offset5+offset5)" corresponding to the candidate power compensation offset5 is less than the current P Loss ; Among them, the first target compensation that is not greater than the current power loss includes "-(offset3+offset5)", "-(offset4+offset5)" and "-(offset5+offset5)", then the maximum compensation is -(offset3+offset5), and its corresponding candidate power compensation is offset3. Therefore, offset3 is determined as the first target power compensation corresponding to the current power loss, and the receiving power interval corresponding to offset3 is (10, 15], that is, the power can be reduced to the range of (10, 15].

[0091] As another example, the current receiving power of the wireless charging receiving end is 21W, which belongs to the receiving power interval (20, 25] in Table 1 above. The power compensation value corresponding to the receiving power interval (20, 25] is offset5, that is, the second target power compensation is offset5. Accordingly, the above correspondence includes five candidate power compensations, namely offset1, offset2, offset3, offset4 and offset5. For each candidate power compensation in Table 1 above, the first target compensation corresponding to the candidate power compensation can be determined, that is, -(offseti+offset5), where i≤5; then, each first target compensation is compared with the current power loss, and the following comparison results are obtained: the first target compensation "-(offset1+offset5)" corresponding to the candidate power compensation offset1 is greater than the current P Loss , the first target compensation "-(offset2+offset5)" corresponding to the candidate power compensation offset2 is greater than the current P Loss , the first target compensation "-(offset3+offset5)" corresponding to the candidate power compensation offset3 is greater than the current P Loss , the first target compensation "-(offset4+offset5)" corresponding to the candidate power compensation offset4 is greater than the current P Loss, the first target compensation "-(offset5+offset5)" corresponding to the candidate power compensation offset5 is greater than the current P Loss "; Among them, the above five first target compensations are all greater than the current power loss, indicating that there is no first target power compensation corresponding to the current power loss. Correspondingly, there is no target received power interval corresponding to the current power loss, indicating that the power reduction charging condition is not met. At this time, charging can still be performed according to the current received power "21W", that is, charging is maintained at the original charging power.

[0092] In another embodiment, the first target power compensation corresponding to the current power loss may be determined according to the second target power compensation and the corresponding relationship through the following steps [1] to [5]:

[0093] Step [1]: Determine whether the second target compensation corresponding to the third target power compensation is greater than the current power loss.

[0094] In the present disclosure, the third target power compensation is the minimum value in the power compensation set, the power compensation set initially includes each candidate power compensation in the corresponding relationship, and the second target compensation is the inverse of the sum of the second target power compensation and the third target power compensation.

[0095] If the second target compensation corresponding to the third target power compensation is greater than the current power loss, execute the following steps [2]; if the second target compensation corresponding to the third target power compensation is not greater than the current power loss, execute the following steps [4].

[0096] Step [2]: Determine whether the number of candidate power compensations in the power compensation set is 1.

[0097] If the number of candidate power compensations in the power compensation set is not 1 (i.e., greater than 1), execute the following step [3], and then return to the above step [1] until the number of candidate power compensations in the power compensation set is 1; if the number of candidate power compensations in the power compensation set is 1, it indicates that there is no first target power compensation corresponding to the current power loss, and accordingly, there is no target receiving power interval corresponding to the current power loss. At this time, the following step [5] can be executed.

[0098] Step [3]: Eliminate the third target power compensation from the power compensation set.

[0099] Step [4]: ​​Determine the third target power compensation as the first target power compensation.

[0100] Step [5]: Maintain the original charging power for charging.

[0101] For example, the current receiving power of the wireless charging receiving end is 21W, which belongs to the receiving power interval (20, 25] in Table 1 above. The power compensation value corresponding to the receiving power interval (20, 25] is offset5, that is, the second target power compensation is offset5. Accordingly, the above correspondence includes five candidate power compensations, namely offset1, offset2, offset3, offset4 and offset5, that is, the power compensation set initially includes offset1, offset2, offset3, offset4 and offset5; then, offset1 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset1+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 5, not 1. At this time, the third target power compensation offset1 can be removed from the power compensation set, and the new power The compensation set includes offset2, offset3, offset4 and offset5; then, offset2 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset2+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 4, not 1. At this time, the third target power compensation offset2 can be removed from the power compensation set, and the new power compensation set includes offset3, offset4 and offset5; then, offset3 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset3+offset5)", which is less than the current power loss. At this time, the third target power compensation offset3 can be determined as the first target power compensation, and the receiving power interval corresponding to offset3 is (10, 15], that is, the power can be reduced to the range of (10, 15].

[0102] As another example, the current receiving power of the wireless charging receiving end is 21W, which belongs to the receiving power interval (20, 25] in Table 1 above. The power compensation value corresponding to the receiving power interval (20, 25] is offset5, that is, the second target power compensation is offset5. Accordingly, the above correspondence includes five candidate power compensations, namely offset1, offset2, offset3, offset4 and offset5, that is, the power compensation set initially includes offset1, offset2, offset3, offset4 and offset5; then, offset1 is determined as the third target power compensation, and its corresponding second target compensation is " -(offset1+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 5, not 1. At this time, the third target power compensation offset1 can be removed from the power compensation set, and the new power compensation set includes offset2, offset3, offset4 and offset5; then, offset2 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset2+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 4, not 1. At this time, the third target power compensation offset2 can be removed from the power compensation set. , the new power compensation set includes offset3, offset4 and offset5; then, offset3 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset3+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 3, not 1. At this time, the third target power compensation offset3 can be removed from the power compensation set, and the new power compensation set includes offset4 and offset5; then, offset4 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset4+offset5)", which is greater than the current power loss. , the number of candidate power compensations in the power compensation set is 2, not 1. At this time, the third target power compensation offset4 can be removed from the power compensation set, and the new power compensation set includes offset5. Afterwards, offset5 is determined as the third target power compensation, and its corresponding second target compensation is "-(offset5+offset5)", which is greater than the current power loss. At this time, the number of candidate power compensations in the power compensation set is 1, indicating that there is no first target power compensation corresponding to the current power loss. Accordingly, there is no target receiving power interval corresponding to the current power loss. At this time, charging can still be performed according to the current receiving power "21W", that is, charging is maintained at the original charging power.

[0103] The specific implementation method of performing target power charging according to the target received power interval in the above S303 is described in detail below.

[0104] In the present disclosure, there are multiple ways to reduce power. One is that the wireless charging transmitter actively limits the power, and the other is that the wireless charging receiver reduces the receiving power.

[0105] Specifically, in one embodiment, the wireless charging transmitter actively limits the power. At this time, the wireless charging transmitter can adjust the charging parameters of the wireless charging transmitter according to the target receiving power range so that the transmission power of the wireless charging transmitter falls within the target receiving power range. The charging parameters may include at least one of the charging voltage, the operating frequency of the transmitter inverter circuit, the duty cycle of the transmitter inverter circuit, and the phase of the transmitter inverter current.

[0106] Among them, the wireless charging transmitter can determine the target charging parameters corresponding to the target receiving power interval according to the corresponding relationship between the receiving power interval and the charging parameters, and then the wireless charging transmitter adjusts its own charging parameters to the target charging parameters.

[0107] In another embodiment, the wireless charging receiving end reduces the receiving power, wherein the wireless charging receiving end can reduce the receiving power by a private transparent transmission method, that is, private transparent transmission is performed on the existing Qi protocol packet, or a private packet polling method can be used to reduce the receiving power of the wireless charging receiving end.

[0108] The following is a detailed description of the specific implementation method of reducing the receiving power of the wireless charging receiving end by the private transparent transmission method. Specifically, the wireless charging transmitting end can send a target receiving power interval to the wireless charging receiving end, so that the wireless charging receiving end can reduce the receiving power according to the target receiving power interval.

[0109] In the present disclosure, the target power for reduced-power charging (ie, the reduced received power) falls within a target received power interval, that is, the target power for reduced-power charging is determined according to the target received power interval.

[0110] For example, the target power (reduced received power) may be the upper limit value of the target received power interval, or the upper limit value of the target received power interval and the average of the upper limit values, which is not specifically limited in the present disclosure.

[0111] In one embodiment, Figure 4As shown, the wireless charging receiving end sends a receiving power packet (Receiver Power Packet, RPP) to the wireless charging transmitting end according to the first preset period, and the RPP packet includes the reported power Preceived; after the wireless charging transmitting end receives the RPP packet, it parses the RPP packet to obtain Preceived, and then calculates the current power loss based on Preceived. If the current power loss does not meet the condition for stopping charging and does not meet the condition for reducing power charging, an ACKnowledge Character (ACK) is replied to the wireless charging receiving end; after receiving the ACK message, the wireless charging receiving end maintains the original charging power for charging; if the current power loss does not meet the condition for stopping charging but meets the condition for reducing power charging, a negative acknowledgment (NAK) is replied to the wireless charging receiving end; after receiving the NAK message, the wireless charging receiving end sends a charging status (ChargeStatus) package or a private package to the wireless charging transmitting end; after receiving the Charge Status package or the private package, the wireless charging transmitting end sends a frequency shift keying (Frequency-Shift Keying, FSK) signal containing a target receiving power range to the wireless charging receiving end; after receiving the FSK signal, the wireless charging receiving end obtains the target receiving power range by parsing the FSK, and reduces the receiving power end according to the target receiving power range.

[0112] The following is a detailed description of the specific implementation method of reducing the receiving power of the wireless charging receiving end by the private packet polling method. Specifically, in response to receiving an inquiry message sent by the wireless charging receiving end to inquire whether to reduce the power charging, the wireless charging transmitting end sends a target receiving power interval to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval. Among them, the wireless charging receiving end sends the inquiry message to the wireless charging transmitting end according to a preset period.

[0113] In one embodiment, Figure 5As shown, the wireless charging receiving end sends a private packet (i.e., an inquiry message) to the wireless charging receiving end according to the second preset period to inquire whether it is necessary to reduce the power of charging. At the same time, the wireless charging receiving end sends an RPP packet to the wireless charging transmitting end according to the first preset period; after the wireless charging transmitting end receives the RPP packet, it replies ACK to the wireless charging receiving end, and obtains Preceived by parsing the RPP packet, and then calculates the current power loss according to Preceived. After the wireless charging transmitting end receives the above inquiry message, if the current power loss does not meet the condition for stopping charging and does not meet the condition for reducing the power of charging, it replies to the wireless charging receiving end with an FSK signal containing a response message for characterizing wireless power reduction charging; after the wireless charging receiving end receives the FSK signal, it maintains the original charging power for charging. After the wireless charging transmitting end receives the above inquiry message, if the current power loss does not meet the condition for stopping charging but meets the condition for reducing the power of charging, it sends an FSK signal containing a target receiving power interval to the wireless charging receiving end; after the wireless charging receiving end receives the FSK signal, it obtains the target receiving power interval by parsing the FSK, and reduces the receiving power end according to the target receiving power interval.

[0114] In addition, the wireless charging system may execute the wireless charging method according to a preset cycle, or may execute the wireless charging method in real time, which is not specifically limited in the present disclosure.

[0115] Figure 6 is a block diagram of a wireless charging device according to an exemplary embodiment. Figure 6 , the device 600 comprises:

[0116] The acquisition module 601 is configured to acquire the current power loss of the wireless charging transmitter;

[0117] The determination module 602 is configured to determine a target receiving power interval according to a correspondence between a receiving power interval and power compensation and the current power loss if the current power loss does not satisfy a charging stop condition;

[0118] The charging module 603 is configured to perform target power charging according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

[0119] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: when the current power loss of the wireless charging transmitter does not meet the condition for stopping charging, first determine the target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss; perform target power charging according to the target receiving power interval, wherein the target power is less than the current receiving power, so that reduced power charging can be achieved to reduce the electromagnetic field strength, avoid high heat caused by the small size of metal foreign matter or being located at the edge of the electromagnetic field, thereby avoiding burns to users and improving the safety and reliability of wireless charging. In addition, the wireless charging receiver can continue to be charged to avoid charging interruptions and improve the continuity of wireless charging.

[0120] Optionally, the determining module 602 includes:

[0121] A first determination submodule is configured to determine a first target power compensation corresponding to the current power loss according to a correspondence between a received power interval and a power compensation;

[0122] The second determining submodule is configured to determine the receiving power interval corresponding to the first target power compensation in the corresponding relationship as the target receiving power interval.

[0123] Optionally, the first determining submodule includes:

[0124] A third determination submodule is configured to determine a second target power compensation corresponding to the received power interval where the current received power is located according to the correspondence between the received power interval and the power compensation;

[0125] The fourth determining submodule is configured to determine a first target power compensation corresponding to the current power loss according to the second target power compensation and the corresponding relationship.

[0126] Optionally, the fourth determination submodule is configured to determine the first target power compensation corresponding to the current power loss based on a comparison result of the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss, wherein the candidate power compensation is the power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the first target compensation corresponding to the candidate power compensation is the negative of the sum of the second target power compensation and the candidate power compensation.

[0127] Optionally, the fourth determination submodule is configured to determine the candidate power compensation corresponding to the maximum compensation as the first target power compensation corresponding to the current power loss, wherein the maximum compensation is a maximum value among the first target compensations that is not greater than the current power loss.

[0128] Optionally, the fourth determining submodule includes:

[0129] a fifth determination submodule, configured to determine whether a second target compensation corresponding to a third target power compensation is greater than the current power loss, wherein the third target power compensation is a minimum value in a power compensation set, the power compensation set initially includes each candidate power compensation in the corresponding relationship, the candidate power compensation is less than or equal to the power compensation in the corresponding relationship, and the second target compensation is the inverse of the sum of the second target power compensation and the third target power compensation;

[0130] a triggering submodule, configured to, if the second target compensation is greater than the current power loss, remove the third target power compensation from the power compensation set, and trigger the fifth determining submodule to determine whether the second target compensation corresponding to the third target power compensation is greater than the current power loss, until the number of candidate power compensations in the power compensation set is 1;

[0131] The sixth determination submodule is configured to determine the third target power compensation as the first target power compensation if the second target compensation is not greater than the current power loss.

[0132] Optionally, the method is applied to the wireless charging transmitter;

[0133] The charging module 603 is configured to adjust the charging parameters of the wireless charging transmitter according to the target receiving power interval so that the transmission power of the wireless charging transmitter falls within the target receiving power interval, wherein the charging parameters include at least one of the charging voltage, the operating frequency of the transmitter inverter circuit, the duty cycle of the transmitter inverter circuit, and the phase of the transmitter inverter current.

[0134] Optionally, the method is applied to the wireless charging transmitter;

[0135] The charging module 603 is configured to send the target receiving power interval to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval.

[0136] Optionally, the method is applied to the wireless charging transmitter;

[0137] The charging module 603 is configured to send the target receiving power interval to the wireless charging receiving end in response to receiving an inquiry message sent by the wireless charging receiving end for inquiring whether to reduce the charging power, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval, wherein the wireless charging receiving end sends the inquiry message to the wireless charging transmitting end according to a preset period.

[0138] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0139] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and the program instructions, when executed by a processor, implement the steps of the wireless charging method provided by the present disclosure.

[0140] Figure 7 800 is a block diagram of a device for wireless charging according to an exemplary embodiment. For example, the device 800 may be a wireless charging transmitter; the device 800 may also be a wireless charging receiver, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0141] Reference Figure 7 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output interface 812 , a sensor component 814 , and a communication component 816 .

[0142] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the wireless charging method described above. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0143] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0144] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0145] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0146] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0147] The input / output interface 812 provides an interface between the processing component 802 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0148] The sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of the device 800. For example, the sensor assembly 814 can detect the open / closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor assembly 814 can also detect the position change of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0149] The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0150] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described wireless charging method.

[0151] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by the processor 820 of the device 800 to perform the above wireless charging method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0152] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above wireless charging method when executed by the programmable device.

[0153] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0154] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging method, characterized in that: The method comprises: Get the current power loss of the wireless charging transmitter; If the current power loss does not meet the charging stop condition, determining a target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss; Target power charging is performed according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

2. The method according to claim 1, characterized in that The determining the target receiving power interval according to the correspondence between the receiving power interval and the power compensation and the current power loss includes: Determining a first target power compensation corresponding to the current power loss according to a correspondence between a received power interval and a power compensation; The receiving power interval corresponding to the first target power compensation in the corresponding relationship is determined as the target receiving power interval.

3. The method according to claim 2, characterized in that The determining, according to the correspondence between the received power interval and the power compensation, a first target power compensation corresponding to the current power loss includes: Determine, according to the correspondence between the received power interval and the power compensation, a second target power compensation corresponding to the received power interval in which the current received power is located; A first target power compensation corresponding to the current power loss is determined according to the second target power compensation and the corresponding relationship.

4. The method according to claim 3, characterized in that The determining, according to the second target power compensation and the corresponding relationship, a first target power compensation corresponding to the current power loss includes: According to the comparison result of the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss, the first target power compensation corresponding to the current power loss is determined, wherein the candidate power compensation is the power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the first target compensation corresponding to the candidate power compensation is the negative of the sum of the second target power compensation and the candidate power compensation.

5. The method according to claim 4, characterized in that The determining, according to a comparison result between the first target compensation corresponding to each candidate power compensation in the corresponding relationship and the current power loss, a first target power compensation corresponding to the current power loss comprises: The candidate power compensation corresponding to the maximum compensation is determined as a first target power compensation corresponding to the current power loss, wherein the maximum compensation is a maximum value among the first target compensations that are not greater than the current power loss.

6. The method according to claim 3, characterized in that The determining, according to the second target power compensation and the corresponding relationship, a first target power compensation corresponding to the current power loss includes: Determining whether a second target compensation corresponding to a third target power compensation is greater than the current power loss, wherein the third target power compensation is a minimum value in a power compensation set, the power compensation set initially includes each candidate power compensation in the corresponding relationship, the candidate power compensation is the power compensation in the corresponding relationship that is less than or equal to the second target power compensation, and the second target compensation is the inverse of the sum of the second target power compensation and the third target power compensation; If the second target compensation is greater than the current power loss, the third target power compensation is removed from the power compensation set, and the process returns to the step of determining whether the second target compensation corresponding to the third target power compensation is greater than the current power loss until the number of candidate power compensations in the power compensation set is 1; If the second target compensation is not greater than the current power loss, the third target power compensation is determined as the first target power compensation.

7. The method according to claim 1, characterized in that The method is applied to the wireless charging transmitter; The charging with target power according to the target received power interval includes: According to the target receiving power interval, the charging parameters of the wireless charging transmitter are adjusted so that the transmission power of the wireless charging transmitter falls within the target receiving power interval, wherein the charging parameters include at least one of the charging voltage, the operating frequency of the transmitter inverter circuit, the duty cycle of the transmitter inverter circuit, and the phase of the transmitter inverter current.

8. The method according to claim 1, characterized in that The method is applied to the wireless charging transmitter; The charging with target power according to the target received power interval includes: The target receiving power interval is sent to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval.

9. The method according to claim 1, characterized in that: The method is applied to the wireless charging transmitter; The charging with target power according to the target received power interval includes: In response to receiving an inquiry message sent by a wireless charging receiving end for inquiring whether to reduce the charging power, the target receiving power interval is sent to the wireless charging receiving end, so that the wireless charging receiving end reduces the receiving power according to the target receiving power interval, wherein the wireless charging receiving end sends the inquiry message to the wireless charging transmitting end according to a preset period.

10. A wireless charging device, characterized in that: The device comprises: An acquisition module is configured to acquire a current power loss of the wireless charging transmitter; a determination module configured to determine a target receiving power interval according to a correspondence between a receiving power interval and power compensation and the current power loss if the current power loss does not satisfy a charging stop condition; The charging module is configured to perform target power charging according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

11. A wireless charging device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: Get the current power loss of the wireless charging transmitter; If the current power loss does not meet the charging stop condition, determining a target receiving power interval according to the corresponding relationship between the receiving power interval and the power compensation and the current power loss; Target power charging is performed according to the target received power interval, wherein the target power falls within the target received power interval and is less than the current received power.

12. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 9 are implemented.

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