WO2022206326A1 - Wireless charging method, apparatus and device, and storage medium - Google Patents

Abstract

A wireless charging method, apparatus and device, and a storage medium. The method comprises: acquiring the temperature of a battery (104) of an electronic device (10); on the basis of determining that the temperature of the battery (104) is less than a first threshold, charging the battery (104) of the electronic device (10) by coupling a first receiving coil (102) with a transmitting coil of a wireless charging device; and on the basis of determining that the temperature of the battery (104) of the electronic device (10) has risen to be greater than or equal to the first threshold, charging the battery (104) by coupling a second receiving coil (103) with the transmitting coil, wherein the impedance of the first receiving coil (102) is greater than the impedance of the second receiving coil (103).

Description

Wireless charging method and device, device, and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202110363815.6 and the application date of April 2, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application in its entirety. .

technical field

The embodiments of the present application relate to electronic technologies, and relate to, but are not limited to, wireless charging methods and devices, devices, and storage media.

Background technique

In a low temperature environment, the battery activity of electronic devices such as mobile phones and tablet computers deteriorates, resulting in slow charging speed. In addition, many complaints about fast charging have been frequently received from users recently. The main reason is that the outside temperature is too low in the cold winter in the north, which limits the charging speed of mobile phones.

SUMMARY OF THE INVENTION

In view of this, the wireless charging method, device, device, and storage medium provided by the embodiments of the present application can improve the heating efficiency, shorten the heating time, thereby shorten the charging time, and improve the charging efficiency. The wireless charging method, device, device, and storage medium provided by the embodiments of the present application are implemented as follows:

The wireless charging method provided by the embodiment of the present application includes: acquiring a battery temperature of an electronic device; based on determining that the battery temperature is less than a first threshold, coupling with a transmitting coil of a wireless charging device through a first receiving coil, so as to connect the electronic device to the electronic device. charging a battery of a device; and coupling a second receive coil to the transmit coil to charge the battery based on determining that the temperature of the battery of the electronic device has risen to greater than or equal to the first threshold; wherein, The impedance of the first receiving coil is greater than the impedance of the second receiving coil.

The electronic device provided by the embodiments of the present application includes: a processor, a first receiving coil, a second receiving coil, and a battery; wherein, the impedance of the first receiving coil is greater than the impedance of the second receiving coil; the first receiving coil A receiving coil is attached to the surface of the battery; the processor is configured to: obtain a battery temperature; and based on determining that the battery temperature is less than a first threshold, connect the first receiving coil with a transmitting coil of the wireless charging device through the first receiving coil coupling to charge the battery; and coupling to the transmit coil through a second receive coil to charge the battery based on determining that the battery temperature has risen to greater than or equal to the first threshold.

The wireless charging device provided by the embodiment of the present application includes: a temperature acquisition module, configured to acquire the battery temperature of the electronic device; a transmit coil of a charging device is coupled to charge a battery of the electronic device; and a second charging module for, based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold, via a second A receive coil is coupled to the transmit coil to charge the battery; wherein the impedance of the first receive coil is greater than the impedance of the second receive coil.

The electronic device provided by the embodiment of the present application includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor implements the method described in the embodiment of the present application when the processor executes the program.

The computer-readable storage medium provided by the embodiments of the present application stores a computer program thereon, and when the computer program is executed by a processor, implements the methods provided by the embodiments of the present application.

In the embodiment of the present application, the impedance of the first receiving coil is greater than the impedance of the second receiving coil, so that when the first receiving coil is coupled with the transmitting coil of the wireless charging device, the received electromagnetic signal is converted into more heat, A small part is converted into induced current to charge the battery; in this way, in the first stage, that is, when the battery temperature is less than the first threshold, the first receiving coil is selected to be coupled with the transmitting coil of the wireless charging device, which can play a role in rapid heating, Thereby, the heating efficiency is improved and the heating time is shortened, so that the battery temperature can rise above the first threshold more quickly (ie, greater than or equal to the first threshold), thereby shortening the charging time and improving the charging efficiency.

Description of drawings

The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, serve to explain the technical solutions of the present application.

1 is a schematic structural diagram of an electronic device according to an embodiment of the application;

FIG. 2 is a schematic structural diagram of another electronic device according to an embodiment of the application;

3 is a schematic structural diagram of another electronic device according to an embodiment of the application;

FIG. 4 is a schematic diagram of an implementation flowchart of a wireless charging method according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of an implementation of another wireless charging method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of an implementation flowchart of another wireless charging method according to an embodiment of the present application;

7 is a schematic structural diagram of a mobile phone;

8 is a schematic structural diagram of still another electronic device according to an embodiment of the present application;

9 is a schematic structural diagram of another electronic device according to an embodiment of the present application;

FIG. 10 is a comparison diagram of the heating and unheated charging durations of the embodiment of the application;

FIG. 11 is a schematic structural diagram of a wireless charging device according to an embodiment of the present application;

FIG. 12 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" can be the same or a different subset of all possible embodiments, and Can be combined with each other without conflict.

It should be pointed out that the term "first\second\third" involved in the embodiments of the present application is used to distinguish similar or different objects, and does not represent a specific ordering of objects. It is understood that "first\second\third" "Three" may be interchanged where permitted in a specific order or sequence, so that the embodiments of the present application described herein can be implemented in sequences other than those illustrated or described herein.

Embodiments of the present application first provide an electronic device, which may be various types of devices with batteries during implementation. For example, the electronic device may include an intelligent mobile terminal (such as a mobile phone), a mobile power supply (such as a charging treasure or travel charger), electric cars, laptops, drones, tablet computers, e-books, e-cigarettes, smart electronic devices (such as watches, wristbands, smart glasses or sweeping robots, etc.), and small electronic products (such as wireless Headphones, Bluetooth speakers, electric toothbrushes or rechargeable wireless mice, etc.) Of course, the electronic device may also be other devices that need to be charged in addition to the above-mentioned devices.

FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the application. As shown in FIG. 1 , the electronic device 10 includes a processor 101 , a first receiving coil 102 , a second receiving coil 103 and a battery 104 ; wherein, the first receiving coil 102 The impedance of is greater than the impedance of the second receiving coil 103;

The processor 101 is configured to: acquire the battery temperature; and when the battery temperature is lower than the first threshold, couple with the transmitting coil 111 of the wireless charging device 11 through the first receiving coil 102 to charge the battery 104; And when the battery temperature rises to be greater than or equal to the first threshold, the second receiving coil 103 is coupled with the transmitting coil 111 of the wireless charging device 11 to charge the battery 104 .

Understandably, the impedance of the first receiving coil 102 is greater than the impedance of the second receiving coil 103, so that when the first receiving coil 102 is coupled with the transmitting coil 111 of the wireless charging device 11, the received electromagnetic signal will be converted into more In this way, in the first stage, that is, when the battery temperature is less than the first threshold, the first receiving coil 102 is selected to be coupled with the transmitting coil 111 of the wireless charging device 11, which can It plays the role of rapid heating, thereby improving the heating efficiency and shortening the heating time, so that the battery temperature can rise above the first threshold more quickly, thereby shortening the charging time and improving the charging efficiency.

Of course, in some embodiments, when the battery temperature is lower than the first threshold, the second receiving coil 103 can also be turned on to couple with the transmitting coil, that is, the first receiving coil 102 and the second receiving coil 103 are both connected to the transmitting coil 111 In this way, the battery is rapidly heated by the first receiving coil 102, and the charging rate is increased by the second receiving coil 103 at the same time.

For example, as shown in Table 1, in Example 1, when the battery temperature T is less than the first threshold, only the first receiving coil 102 is coupled with the transmitting coil 111, and the corresponding charging power is _Pa ; in Example 2 Among them, when the battery temperature T is less than the first threshold, the first receiving coil 102 and the second receiving coil 103 are both coupled to the transmitting coil 111, and the corresponding charging power is P _b ; where P _b >P _a .

Table 1

	battery temperature T	working coil	charging power
Example 1	T<first threshold	The first receiving coil 102	Pa
Example 2	T<first threshold	The first receiving coil 102 and the second receiving coil 103	P b

As the charging time increases, the battery temperature T further rises. In some embodiments, as shown in Table 2, in Example 3, when the battery temperature T rises to be greater than or equal to the first threshold, it can only pass the second The receiving coil 103 is coupled with the transmitting coil 111, and the coupling between the first receiving coil 102 and the transmitting coil 111 is disconnected, and the corresponding charging power is P _c ; in Example 4, when the battery temperature T rises to be greater than or equal to the first threshold and When the value is less than the second threshold, the coupling between the first receiving coil 102 and the transmitting coil 111 may not be disconnected, but only the first receiving coil 102 is coupled with the transmitting coil 111, and the corresponding charging power is P _a ; in Example 5 , when the battery temperature T rises to greater than or equal to the first threshold and less than the second threshold, the first receiving coil 102 and the second receiving coil 103 are coupled with the transmitting coil 111, and the corresponding charging power is P _d ; wherein, P _a <P _b <P _c ≤P _d ;

Table 2

	battery temperature T	working coil	charging power
Example 3	T≥first threshold	The second receiving coil 103	P c
Example 4	second threshold>T≥first threshold	The first receiving coil 102	Pa
Example 6	T≥Second Threshold	The second receiving coil 103	Pe
Example 5	second threshold>T≥first threshold	The first receiving coil 102 and the second receiving coil 103	Pd
Example 7	T≥Second Threshold	The second receiving coil 103	Pe

The battery temperature T rises further, in some embodiments, based on Example 4, in Example 6, as shown in Table 2, when the battery temperature T rises above the second threshold, the first receiving coil 102 is disconnected from the transmitting coil The coupling of 111 turns on the coupling between the second receiving coil 103 and the transmitting coil 111, and the corresponding charging power is P _e ; based on example 5, in example 7, when the battery temperature T rises above the second threshold, only disconnection The coupling between the first receiving coil 102 and the transmitting coil 111, at this time, the working coil is the second receiving coil 103, that is, only the second receiving coil 103 is coupled with the transmitting coil 111, and the corresponding charging power is P _e ; wherein, P _e >P _d .

It should be noted that, in each temperature stage of the above example, the charging power may also be non-fixed, and the charging power may be adaptively increased as the temperature increases. During the whole charging process, the above examples corresponding to different temperature stages can be combined arbitrarily.

The manner in which the processor 101 obtains the battery temperature may be various. For example, the processor 101 obtains the battery temperature from a temperature sensor used to measure the temperature of the battery 104; for another example, the processor 101 can also obtain the battery temperature from a temperature sensor used to measure the temperature of the whole electronic device, that is, the whole For another example, the processor 101 can also communicate with the wireless charging device 11 to obtain the battery temperature from the wireless charging device, that is, the external ambient temperature measured by the wireless charging device 11 is used as the battery temperature; another example , the processor 101 may also determine the battery temperature according to the current temperature predicted by the weather forecast application.

Understandably, the battery temperature is lower than the first threshold, which often affects the charging speed of the battery. For example, the first threshold is the highest temperature that does not meet the standard fast charging conditions. Standard fast charging conditions are conditions predefined by the designer of the electronic device. For example, if the standard fast charging condition is that the temperature of the standard fast charging battery cannot be lower than 10°C, the first threshold is 10°C. In this embodiment of the present application, the size of the first threshold is not limited.

In the embodiments of the present application, the relationship between the first receiving coil and the second receiving coil may be various. For example, in the following embodiment, the first receiving coil 202 and the second receiving coil 203 may be wound in parallel and independently; for another example, the first receiving coil 302 and the second receiving coil 303 belong to the same tap coil, but the first The length of the receiving coil 302 is greater than the length of the second receiving coil 303 .

In addition, the positions of the first receiving coil 102 and the second receiving coil 103 are not limited, and may be arbitrary positions. In some embodiments, the first receiving coil 102 is pressed against the surface of the battery 104 ; the second receiving coil 103 may be pressed against the surface of the battery 104 , or may have a certain distance from the battery 104 .

An embodiment of the present application further provides an electronic device. FIG. 2 is a schematic structural diagram of the electronic device provided by an embodiment of the present application. As shown in FIG. 2 , the electronic device 20 includes: a processor 201 , a first receiving coil 202 , and a second receiving coil 202 . The coil 203, the battery 204, the receiving module 205, the resonant capacitor 206, the first switch 207 and the second switch 208; wherein, the impedance of the first receiving coil 202 is greater than that of the second receiving coil 203; On the surface of the battery 204, the first receiving coil 202 and the second receiving coil 203 are parallel and independent cables.

The relationship between the first receiving coil 202 and the second receiving coil 203 is not limited, as long as the impedance of the first receiving coil 202 is greater than the impedance of the second receiving coil 203 . In some embodiments, when the model of the first receiving coil 202 is the same as that of the second receiving coil 203 and the length is the same, the number of strands of the first receiving coil 202 is less than the number of strands of the second receiving coil 203, In this way, the impedance of the first receiving coil 202 is greater than the impedance of the second receiving coil 203 when the electronic device is being charged. For example, the first receiving coil 202 is 1 strand, and the second receiving coil 203 is N strands (N is greater than 1). In this case, under the condition that the two coils both flow the same current, the heat energy generated by the first receiving coil 202 It is N times the thermal energy generated by the second receiving coil 203 . In the case of high-power charging, it is obvious that the charging efficiency of the single-strand wire is too low, and the heat generation is very serious, which affects the charging efficiency. However, when it is required to heat the battery, the single-strand wire can be used to achieve the heating effect.

In other embodiments, when the model of the first receiving coil 202 is the same as the model of the second receiving coil 203, the length of the first receiving coil 202 is greater than the length of the second receiving coil 203, and the length of the first receiving coil 202 is greater than that of the second receiving coil 203. The number of strands is less than or equal to the number of strands of the second receiving coil 203 , so that the impedance of the first receiving coil 202 is greater than the impedance of the second receiving coil 203 when the electronic device is being charged.

In still other embodiments, the model of the first receiving coil 202 may be different from the model of the second receiving coil 203, but in the case of the same length and the same number of strands, the impedances of the two should be different when working. The impedance of the receiving coil 202 is greater than the impedance of the second receiving coil 203 .

In a word, in this application, there is no limitation on how to design the relationship between the first receiving coil 202 and the second receiving coil 203, and it can be arbitrary, as long as the impedance of the first receiving coil 202 is greater than that of the second receiving coil 203, namely Can.

The first ends of the first receiving coil 202 and the second receiving coil 203 are connected to the receiving module 205, the second end of the first receiving coil 202 is connected to the first end of the first switch 207, and the second end of the first switch 207 is connected to the receiving module 205. The first end of the resonance capacitor 206 is connected, and the second end of the resonance capacitor 206 is connected to the receiving module 205;

The second end of the second receiving coil 203 is connected to the first end of the second switch 208 , the second end of the second switch 208 is connected to the first end of the resonant capacitor 206 , and the second end of the resonant capacitor 206 is connected to the receiving module 205 ;

The processor 201 is configured to acquire the battery temperature, and when the battery temperature is less than the first threshold, turn on the first switch 207, so that the first receiving coil 202 and the transmitting coil 111 (not shown in the figure) ) is coupled; when the battery temperature rises to be greater than or equal to the first threshold, the second switch 208 is turned on, so that the second receiving coil 203 is coupled with the transmitting coil 111 .

When the battery temperature is lower than the first threshold, in some embodiments, the processor 201 may control the first switch 207 to be turned on and the second switch 208 to be turned off, or the processor 201 may also control the first switch 207 and the second switch 208 to be turned off. The second switches 208 are all turned on. When the battery temperature rises above the first threshold, in some embodiments, the processor 201 may control the first switch 207 to be turned off and the second switch 208 to be turned on, or the processor 201 may further control the first switch 207 and the second switch 208 are both turned on, and when the battery temperature continues to rise to a value greater than or equal to the second threshold, the first switch 207 is disconnected, that is, the coupling between the first receiving coil 202 and the transmitting coil 111 is disconnected; wherein the second The threshold value is less than or equal to the upper limit value of the safe temperature of the battery 204 ; in this way, the charging efficiency can be improved and the charging safety can be ensured.

Alternatively, in some embodiments, when the battery temperature rises above the first threshold and is less than the second threshold, the processor 201 controls the first switch 207 to be turned on and the second switch 208 to be turned off, and when the battery temperature rises to the first When the two thresholds are above, the first switch 207 is controlled to be turned off, and the second switch 208 is turned on;

Alternatively, in some embodiments, when the battery temperature rises above the first threshold and is less than the second threshold, the processor 201 controls both the first switch 207 and the second switch 208 to be turned on, and when the battery temperature continues to rise to the second threshold When the threshold value is higher than the threshold value, the processor 201 controls the first switch 207 to turn off, and the second switch 208 continues to be in an on state.

When the battery temperature rises above the first threshold, both the first switch 207 and the second switch 208 are turned on, which will not affect the charging efficiency, and can continue to heat the battery, thereby increasing the charging rate. In some embodiments, when the battery temperature continues to rise above the second threshold, the processor 201 turns off the first switch 207 and charges the battery at a higher charge rate. For example, when the battery temperature is greater than or equal to the first threshold and less than the second threshold, the battery is charged at a charging rate of 1.5C, and when the battery temperature rises above the second threshold, the battery is charged at a charging rate of 3.0C.

In some embodiments, when the battery temperature rises to the second threshold, the first switch 207 is turned off, that is, the coupling between the first receiving coil 202 and the transmitting coil is disconnected, so as to stop heating the battery; wherein, the The second threshold value is less than or equal to the upper limit value of the safe temperature of the battery; in this way, the charging safety can be improved.

The first receiving coil 202 and the second receiving coil 203 are used to receive the electromagnetic signal emitted by the transmitting coil when coupled with the transmitting coil, thereby outputting an induced current to the resonance capacitor 206;

a resonant capacitor 206 for converting the induced current into a resonant current and outputting it to the receiving module 205;

The receiving module 205 is configured to convert the input resonant current into a DC current and output it to the battery 204 .

In some embodiments, the receiving module 205 may communicate with the processor 201 to determine at what charge rate the battery should be charged at the current stage. For example, when the processor 201 determines that the battery temperature is less than the first threshold, the processor 201 turns on the first switch 207, or turns on the first switch 207 and the second switch 208, and sends a first instruction to the receiving module 205; wherein the first instruction Used to instruct the receiving module 205 to output the third charging current to the battery; when the processor 201 determines that the battery temperature rises above the first threshold and is less than the second threshold, it turns on the first switch 207 and the second switch 208, and sends a second The instruction is given to the receiving module 205; wherein, the second instruction is used to instruct the receiving module 205 to output the second charging current to the battery; then, when the processor 201 determines that the battery temperature continues to rise above the second threshold, the first switch 207 is turned off, Thus, the heating of the battery is stopped, and a third instruction is sent to the receiving module 205; wherein, the third instruction is used to instruct the receiving module 205 to output the first charging current to the battery.

In the above example, the third charging current<the second charging current<the first charging current. In some embodiments, the second charging current is a standard fast charging current predefined by the designer of the electronic device. For example, the charging rate corresponding to the standard fast charging current is 1.5C, the charging rate corresponding to the first charging current is 3C, and the charging rate corresponding to the third charging current is 0.5C. Of course, in the embodiment of the present application, the charging rate is not limited to these values, and the charging rate corresponding to the charging current may be any value defined.

An embodiment of the present application further provides an electronic device. FIG. 3 is a schematic structural diagram of the electronic device provided by an embodiment of the present application. As shown in FIG. 3 , the electronic device 30 includes: a processor 301 and a first receiving coil 302 (labeled in the figure). (not shown), a second receiving coil 303 (not shown in the drawing), a battery 304, a receiving module 305, a resonance capacitor 306, a first switch 307 and a second switch 308; wherein,

The first receiving coil 302 and the second receiving coil 303 belong to the same tap coil 309, the tap coil 309 includes a first end, a second end and a middle tap, and the coil between the first end and the second end is used as the first receiving coil 302 , the coil between the first end and the middle tap is used as the second receiving coil 303 .

In the present application, the number of strands of the tap coil 309 is not limited, and may be one strand or multiple strands. The number of strands of the receiving coil is the same as the number of strands of the tap coil 309 . Understandably, the coil between the first end and the second end of the tap coil 309 is used as the first receiving coil 302, and the coil between the first end and the middle tap is used as the second receiving coil 303; in this way, the first receiving coil is The length of 302 is greater than the length of the second receiving coil 303, so that the impedance of the first receiving coil 302 is greater than that of the second receiving coil 303 when the electronic device is being charged, so that the first receiving coil 302 can generate more heat, so as to achieve Efficient heating of the battery.

The first end of the tap coil 309 is connected to the receiving module 305, the second end of the tap coil 309 is connected to the first end of the first switch 307, and the second end of the first switch 307 is connected to the first end of the resonant capacitor 306, so The middle tap is connected to the first end of the second switch, the second end of the second switch is connected to the first end of the resonant capacitor 306, and the second end of the resonant capacitor 306 is connected to the receiving module 305;

The processor 301 is configured to acquire the battery temperature, and when the battery temperature is less than a first threshold, turn on the first switch 307 to couple the first receiving coil 302 to the transmitting coil; When the temperature rises above the first threshold, the second switch 308 is turned on to couple the second receiving coil 303 to the transmitting coil.

Similar to the previous embodiment, when the battery temperature is less than the first threshold, in some embodiments, the processor 301 may control the first switch 307 to be turned on and the second switch 308 to be turned off, or the processor 301 It is also possible to control both the first switch 307 and the second switch 308 to be turned on. When the battery temperature rises above the first threshold, in some embodiments, the processor 301 may control the first switch 307 to be turned off and the second switch 308 to be turned on, or the processor 301 may further control the first switch 307 and the second switch 308 are both turned on.

Alternatively, in some embodiments, when the battery temperature rises above the first threshold and is less than the second threshold, the processor 301 controls the first switch 307 to be turned on and the second switch 308 to be turned off, and when the battery temperature rises to the first When the two thresholds are above, the first switch 307 is controlled to be turned off, and the second switch 308 is turned on; or, in some embodiments, when the battery temperature rises to above the first threshold and less than the second threshold, the processor 301 controls the first The switch 307 and the second switch 308 are both turned on, and when the battery temperature continues to rise above the second threshold, the processor 301 controls the first switch to turn off and the second switch to continue to be turned on.

When the battery temperature rises above the first threshold, both the first switch 307 and the second switch 308 are turned on, which will not affect the charging efficiency, and can continue to heat the battery, thereby increasing the charging rate. In some embodiments, when the battery temperature continues to rise above the second threshold, the processor 301 turns off the first switch 307 and charges the battery at a higher charge rate. For example, when the battery temperature is greater than or equal to the first threshold and less than the second threshold, the battery is charged at a charging rate of 1.5C, and when the battery temperature rises above the second threshold, the battery is charged at a charging rate of 3.0C.

The first receiving coil 302 and the second receiving coil 303 are used to receive the electromagnetic signal emitted by the transmitting coil when coupled with the transmitting coil, thereby outputting the induced current to the resonance capacitor 306;

a resonant capacitor 306 for converting the induced current into a resonant current and outputting it to the receiving module 305;

The receiving module 305 is configured to convert the input resonant current into a DC current and output it to the battery 304 .

Similar to the previous embodiment, in some embodiments, the receiving module 305 may communicate with the processor 301 to determine at what charging rate the battery should be charged at the current stage. For example, when the processor 301 determines that the battery temperature is lower than the first threshold, the processor 301 turns on the first switch 307, or turns on the first switch 307 and the second switch 308, and sends the first instruction to the receiving module 305; wherein the first instruction Used to instruct the receiving module 305 to output the third charging current to the battery; the processor 301 turns on the first switch 307 and the second switch 308 when it is determined that the battery temperature rises from the first temperature range to above the first threshold and less than the second threshold , and send the second instruction to the receiving module 305; wherein, the second instruction is used to instruct the receiving module 305 to output the second charging current to the battery; then, when the processor 201 determines that the battery temperature rises above the second threshold, the A switch 307 stops heating the battery, and sends a third command to the receiving module 305; wherein the third command is used to instruct the receiving module 305 to output the first charging current to the battery.

In the above example, the third charging current<the second charging current<the first charging current. For example, the second charging current is a standard fast charging current predefined by the designer of the electronic device.

An embodiment of the present application provides a wireless charging method, which is applied to the above-mentioned electronic device, and the functions implemented by the method can be implemented by calling a program code by a processor in the electronic device. Of course, the program code can be stored in a computer storage medium, It can be seen that the electronic device includes at least a processor and a storage medium.

FIG. 4 is a schematic flowchart of the implementation of the wireless charging method provided by the embodiment of the present application. As shown in FIG. 4 , the method may include the following steps 401 to 403:

Step 401, the electronic device acquires the battery temperature.

In this embodiment of the present application, the timing for acquiring the battery temperature by the electronic device is not limited. In some embodiments, the electronic device obtains the battery temperature upon detecting establishment of communication with the wireless charging device or proximity to the wireless charging device. In other embodiments, when communication with the wireless charging device or proximity to the wireless charging device is detected, and the battery voltage is lower than a threshold, the charging current of the battery is lower than a threshold, and/or the battery level is lower than a threshold, etc.

In the charging state with the bright screen, it means that the user is operating the electronic device. The increase of the processor load will make the motherboard heat up, which will increase the temperature of the battery, so the battery can not be heated at this time.

In the charging state with the screen off, the user does not operate the electronic device, and the processor load is the lowest to achieve the purpose of energy saving, so the temperature rise of the motherboard is not obvious. If the ambient temperature is too low at this time, the battery cannot be charged or is charged slowly, so the temperature of the battery is not obvious. Optionally, the battery temperature is acquired when the electronic device is in a charging state with the screen off.

Step 402 , when the temperature of the battery is lower than the first threshold, the electronic device is coupled with the transmitting coil of the wireless charging device through the first receiving coil to charge the battery of the electronic device.

It can be understood that when the first receiving coil is coupled with the transmitting coil, a part of the received electromagnetic energy will also be converted into heat energy, and the temperature of the first receiving coil will increase, thereby heating the battery. As described in the foregoing embodiments, the first receiving coil can be attached to the surface of the battery, which can reduce the conduction path of thermal energy and reduce the loss of thermal energy, thereby heating the battery more efficiently.

For step 402, the electronic device may select only the first receiving coil to be coupled with the transmitting coil, or may select the first receiving coil and the second receiving receiving coil to be coupled with the transmitting coil. For the latter solution, in some embodiments, the electronic device may gradually increase the current flowing into the battery as the battery temperature gradually increases, thereby shortening the charging time.

Step 403, when the temperature of the battery of the electronic device rises to be greater than or equal to a first threshold, the electronic device is coupled with the transmitting coil through a second receiving coil to charge the battery; wherein the The impedance of the first receiving coil is greater than the impedance of the second receiving coil.

In some embodiments, when the battery temperature continues to rise above the first threshold and less than the second threshold, the electronic device may select only the second receiving coil to couple with the transmitting coil, and disconnect the first receiving coil from the transmitting coil. coupling, during this period, the power supplied to the second receiving coil is controlled to be the second power; wherein, the second power is equal to a specific power value, and the specific power value is greater than or equal to the battery temperature A power value corresponding to a threshold value smaller than the second threshold value; converting the induced current generated by the second receiving coil into a second charging current to charge the battery; wherein the second charging current is equal to The charging current corresponding to the specific power value. For example, the charging rate corresponding to the second charging current is 1.5C.

In other embodiments, when the battery temperature rises above the first threshold and is less than the second threshold, the electronic device may further select the first receiving coil and the second receiving coil to be coupled with the transmitting coil, which is equivalent to the first receiving coil and the second receiving coil. The receiving coil continues to heat the battery, and during this period, the electronic device can control the power supply to the second receiving coil to be the second power, and convert the induced current generated by the second receiving coil into the second charging current, to charge the battery; when the battery temperature continues to rise above the second threshold, disconnect the coupling between the first receiving coil and the transmitting coil, and keep the coupling between the second receiving coil and the transmitting coil, during this period, the electronic device operates at a high The second receiving coil is powered by the first power of the second power, and the induced current generated by the second receiving coil is converted into a first charging current to charge the battery; wherein the first charging current is greater than the second charging current For example, the charging rate corresponding to the first charging current is 3C, and the charging rate corresponding to the second charging current is 1.5C; in this way, the charging time can be greatly shortened and the charging efficiency can be improved on the premise of ensuring charging safety.

In the embodiment of the present application, the impedance of the first receiving coil is greater than the impedance of the second receiving coil, so that when the first receiving coil is coupled with the transmitting coil of the wireless charging device, the received electromagnetic signal will be converted into more heat , a small part is converted into induced current to charge the battery; in this way, in the first stage, that is, when the battery temperature is less than the first threshold, the first receiving coil is selected to couple with the transmitting coil of the wireless charging device, which can play a role in rapid heating , thereby improving the heating efficiency and shortening the heating time, so that the battery temperature can rise above the first threshold more quickly, thereby shortening the charging time and improving the charging efficiency.

An embodiment of the present application further provides a wireless charging method. FIG. 5 is a schematic flowchart of the implementation of the wireless charging method provided by the embodiment of the present application. As shown in FIG. 5 , the method may include the following steps 501 to 505:

Step 501, the electronic device obtains the battery temperature;

Step 502 , when the temperature of the battery is lower than a first threshold, the electronic device selects a first receiving coil to couple with the transmitting coil of the wireless charging device to charge the battery of the electronic device.

In some embodiments, the electronic device may select the first receive coil and the second receive coil to be coupled with the transmit coil; in this way, more induced current can be generated, thereby increasing the rate of charge conditions (eg, battery temperature) If permitted, charge the battery with a larger current, thereby improving the charging efficiency and shortening the charging time.

Step 503, when the temperature of the battery of the electronic device rises to above a first threshold and less than a second threshold, the electronic device still charges the battery through the first receiving coil until the battery of the electronic device is charged When the temperature rises above the second threshold, the coupling between the first receiving coil and the transmitting coil is disconnected, and the second receiving coil is coupled with the transmitting coil; wherein, the first receiving coil is coupled to the transmitting coil; The impedance is greater than the impedance of the second receiving coil.

In some embodiments, step 503 may be implemented by charging the battery only through the first receiving coil, or through the first receiving coil and the second receiving coil if the battery temperature rises above the first threshold and less than the second threshold The coil charges the battery until the temperature of the battery rises above the second threshold, disconnects the coupling of the first receiving coil from the transmitting coil, and keeps the second receiving coil coupled with the transmitting coil.

In some embodiments, the second threshold is less than or equal to the upper limit of the safe temperature of the battery. For example, if the upper limit of the safe temperature of the battery is 60°C, then the second threshold can be set to a value less than or equal to 60°C; in this way, when the battery temperature rises above the second threshold, the first receiver is disconnected Coupling of the coil with the transmitting coil stops heating the battery, thereby enhancing charging safety.

Step 504, the electronic device controls the power supplied to the second receiving coil to be the first power; wherein, the first power is greater than a specific power value, and the specific power value is greater than or equal to the first power value of the battery temperature The power value corresponding to the threshold value and less than the second threshold value;

Step 505 , the electronic device converts the induced current generated by the second receiving coil into a first charging current to charge the battery, wherein the first charging current is greater than the charging current corresponding to the specific power value.

In some embodiments, the charging rate corresponding to the first charging current is greater than the charging rate corresponding to the specific power value. For example, the charging rate corresponding to the first charging current is 3C, and the charging rate corresponding to a specific power value is 1.5C.

In some embodiments, when charging the battery through the first receiving coil, the current flowing into the battery is controlled to be less than or equal to the current that can be tolerated by the tabs of the battery; in this way, the charging safety can be ensured .

An embodiment of the present application further provides a wireless charging method. FIG. 6 is a schematic flowchart of the implementation of the wireless charging method provided by the embodiment of the present application. As shown in FIG. 6 , the method may include the following steps 601 to 606:

Step 601, the electronic device receives an opening instruction; wherein, the opening instruction is used to instruct to turn on the heating mode or the fast charging mode; wherein, the heating mode refers to the mode in which the first receiving coil is coupled with the transmitter, and the fast charging mode refers to the The defined fast charging strategy is the mode in which the battery is charged, eg, the battery is charged at a preset charging voltage.

Step 602, the electronic device acquires the battery temperature of the electronic device in response to the turn-on instruction;

Step 603, when the temperature of the battery is lower than the first threshold, the electronic device is coupled with the transmitting coil of the wireless charging device through the first receiving coil to charge the battery of the electronic device;

In some embodiments, an electronic device may select the first receive coil and the second receive coil to couple with the transmit coil.

It can be understood that in the embodiment of the present application, heating is a prerequisite, and only when the user instructs heating or instructs to turn on the fast charging mode, and the battery temperature is lower than the first threshold, the first receiving coil is selected to be in phase with the transmitting coil. Coupling, thereby heating the battery; in this way, the internal structure of the battery can be prevented from changing at high temperatures, such as rapid consumption of electrolyte.

Step 604, when the temperature of the battery of the electronic device rises above a first threshold, the electronic device is coupled to the transmitting coil through a second receiving coil;

Step 605, the electronic device controls the power supply to the second receiving coil to be the second power; wherein the second power is equal to a specific power value, and the specific power value is greater than or equal to the first battery temperature The power value corresponding to the threshold value and less than the second threshold value;

Step 606, the electronic device converts the induced current generated by the second receiving coil into a second charging current to charge the battery; wherein, the second charging current is equal to the charging current corresponding to the specific power value; for example , the charging rate corresponding to this charging current is 1.5C.

The descriptions of the above method embodiments are similar to the descriptions of the above device embodiments, and have similar beneficial effects to those of the device embodiments. For technical details not disclosed in the method embodiments of the present application, please refer to the description of the device embodiments of the present application to understand.

In a low temperature environment, the battery often cannot be charged quickly, or the normal operation of the battery is affected when the temperature is too low. Because the temperature is too low, on the one hand, the reaction speed inside the battery will decrease, so that fast charging cannot be achieved. On the other hand, the low temperature environment will lead to lithium precipitation in the negative electrode, which will not only lose the capacity of the battery, but may also lead to precipitation. The lithium dendrites penetrate the separator and cause safety problems, which is also the main reason for limiting low-temperature fast charging.

Based on this, an exemplary application of the embodiments of the present application in a practical application scenario will be described below.

The embodiments of the present application provide a method for first heating the battery to a target charging temperature by using the self-heating of the wireless charging coil without additionally changing the structure of the battery, and then charging the battery by using the corresponding charging current. On the one hand, it can improve the charging speed of the battery at low temperature, and at the same time, it can break through the rated charging rate of the battery design and greatly improve the charging speed of the battery.

The embodiment of this application is divided into two parts. First, the structure of the receiving coil of the wireless charging part needs to be changed. In the low temperature state, the receiving coil needs to have a larger AC impedance (ie Rs) to achieve the effect of self-heating of the coil. The coil structure requirements are as follows:

1) As shown in FIG. 7, the coil needs to be closely attached to the battery, so this solution does not have high requirements on the structure of the mobile phone battery, and the beneficial effects of the embodiments of the present application can be achieved without changing the structure of the mobile phone;

2) The coil adopts a multi-channel method, which can be wound in parallel or in a middle-tap method. Parallel wiring is divided into multi-strand winding method and flexible printed circuit (Flexible Printed Circuit, FPC) multi-path routing method; middle tap method, that is, through the middle of the coil. The low AC impedance coil is used for fast charging, and the high impedance is used for battery heating scenarios. As shown in Figure 8, the method of parallel multi-strand wiring is adopted; in which strand 1 is used for heating, and the other strands are used for charging. One end of strand 1 and other strands are connected to the receiving module, the other end of strand 1 is connected to one end of switch 1 (ie, the first switch), and the other ends of other strands are connected to switch 2 (ie, the second switch) One end of the switch 1 and switch 2 are connected to one end of the resonant capacitor, and the other end of the resonant capacitor is connected to the receiving module. The control terminal of the processor is connected to the switch 1 and the switch 2, and is used for controlling the conduction state of the switch 1 and the switch 2. The processor can communicate with the receiving module, for example, to indicate how much current the receiving module should currently charge the battery with.

It is understandable that the AC impedance of the single-strand line is relatively high, and the impedance can be almost N times that of the N-strand line. For example, when the single-strand line and the N-strand line are both over-current 1A, the single-strand line heats up. N times of N strands. In the case of high-power charging, obviously the efficiency of the single-strand wire is too low, and the heat generation is very serious, which affects the charging efficiency. However, when it is required to heat the battery, the single-strand wire can be used to achieve the heating effect.

As shown in Figure 9, the middle tap method is adopted, in which the middle tap interface 1 of the tap coil is connected to one end of the switch 2, one end of the tap coil is connected to the receiving module, and the other end is connected to one end of the switch 1. The switch 1 and The other end of the switch 2 is connected to one end of the resonant capacitor, the other end of the resonant capacitor is connected to the receiving module, and the control end of the processor is connected to the switch 1 and the switch 2 for controlling the conduction state of the switch 1 and the switch 2. The processor can communicate with the receiving module, for example, to indicate how much current the receiving module should currently charge the battery with.

It is understandable that the method of the middle tap also distinguishes the coil impedance. During high-power charging, the middle tap interface 1 is used to connect, the impedance is relatively low, and the heat generation is small. When the battery needs to be heated, the coil is fully connected, and the impedance is compared. High, the fever is relatively large.

3) When charging starts, (1) if the battery temperature is at a lower temperature, that is, when the normal fast charging temperature range (that is, greater than or equal to the first threshold value and less than the second threshold value) is below, for the structure shown in FIG. 8, it can be connected first. Switch 1 and turn off switch 2, so that the coil is in a high impedance state. The charging current can also cause the coil to heat up at low power, thereby heating the battery, making the battery temperature rise to the normal fast charging temperature range, and then turning on switch 2 and switch. 1. Start the normal fast charging mode; for the structure shown in Figure 9, you can first turn off switch 2 and turn on switch 1, so that the coil is in a high impedance state, and the charging current can also cause the coil to heat up at low power, so Heat the battery to make the battery temperature rise to the normal fast charging temperature range, then turn on switch 2 and turn off switch 1.

4) When the battery is already in the normal fast charging temperature range, the same can also be used to heat the battery as mentioned in item 3), so that the battery temperature rises to a higher temperature range (that is, greater than or equal to the second threshold), Then switch to the low impedance mode and turn on a larger charging rate. For example, the normal fast charge of the battery cell is 1.5C at room temperature, and the 3C fast charge mode starts after heating to 50 °C; in this mode, the heating temperature cannot exceed the battery can The upper limit of the storage temperature, for example, the storage temperature of the battery is 60°C (that is, an example of the second threshold), the heating temperature cannot exceed this temperature;

5) When heating, the current flowing into the battery should not be too large, preferably not exceeding the current value that can be tolerated by the battery tabs;

6) In order to prevent the internal structure of the battery from changing at high temperature, such as rapid consumption of electrolyte, in some embodiments, heating is only applied when fast charging is turned on, and the rest of the time, such as discharge and normal fast charging, will not exceed normal temperature;

7) As shown in Figure 10, it is a graph of a 0.7C cell with a capacity of 5100mAh charged at a rate of 0.7C at room temperature of 25°C and charged at a rate of 1.5C after heating to 50°C. It can be seen from the figure that at room temperature The full charging time is 155min, and the charging time after heating is shortened to 88min. It can be seen that the charging speed of the battery can be greatly improved after heating.

The embodiment of the present application provides a method of heating the battery by increasing the impedance of the receiving coil for wireless charging without additionally changing the internal structure of the battery. After heating the interior of the battery to the target charging temperature in advance, the corresponding charging current for charging. On the one hand, it can improve the charging speed of the battery at low temperature, and at the same time, it can break through the rated charging rate of the battery design and greatly improve the charging speed of the battery.

Based on the foregoing embodiments, the embodiments of the present application provide a wireless charging device, which includes each module included and each unit included in each module, which can be implemented by a processor; of course, it can also be implemented by a specific logic circuit Implementation: In the process of implementation, the processor may be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA) or the like.

FIG. 11 is a schematic structural diagram of a wireless charging device according to an embodiment of the present application. As shown in FIG. 11 , the device 110 includes a temperature acquisition module 111 , a first charging module 112 and a second charging module 113 , wherein:

a temperature acquisition module 111, configured to acquire the battery temperature of the electronic device;

a first charging module 112, configured to couple with the transmitting coil of the wireless charging device through the first receiving coil to charge the battery of the electronic device when the temperature of the battery is lower than the first threshold; and

The second charging module 113 is configured to couple with the transmitting coil through the second receiving coil to charge the battery when the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold ; wherein, the impedance of the first receiving coil is greater than the impedance of the second receiving coil.

In some embodiments, the second charging module 113 is configured to continue to pass through the first receiving coil when the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold and less than the second threshold charging the battery until the temperature of the battery of the electronic device rises to be greater than or equal to a second threshold, disconnect the coupling of the first receiving coil and the transmitting coil; wherein the second threshold is greater than the the first threshold; and, when the temperature of the battery of the electronic device rises to be greater than or equal to the second threshold, control the power supplied to the second receiving coil to be the first power; wherein the first power greater than a specific power value, the specific power value is a power value corresponding to when the battery temperature is greater than or equal to the first threshold and less than the second threshold; the induced current generated by the second receiving coil is converted into The first charging current is used to charge the battery; wherein, the first charging current is greater than the charging current corresponding to the specific power value.

In some embodiments, the apparatus 110 further includes a control module for: disconnecting the coupling of the first receiving coil and the transmitting coil when the temperature of the battery of the electronic device rises to be greater than or equal to a second threshold; Wherein, the second threshold value is less than or equal to the upper limit value of the safe temperature of the battery.

In some embodiments, when the battery is charged through the first receiving coil, the current flowing into the battery is controlled to be less than or equal to the current that can be tolerated by the tabs of the battery.

In some embodiments, the obtaining module 111 is configured to: receive a turn-on instruction; wherein the turn-on command is used to instruct turning on the heating mode or the fast charging mode; and in response to the turn-on command, obtain the battery temperature of the electronic device.

In some embodiments, the second charging module 113 is configured to: couple with the transmitting coil through the second receiving coil; and control the power supplied to the second receiving coil to be the second power; wherein, the the second power is equal to a specific power value, and the specific power value is a power value corresponding to when the battery temperature is greater than or equal to the first threshold value and less than the second threshold value; The induced current is converted into a second charging current to charge the battery; wherein, the second charging current is equal to the charging current corresponding to the specific power value.

In some embodiments, the first charging module 112 is configured to: couple with the transmitting coil through the first receiving coil and the second receiving coil.

The descriptions of the above apparatus embodiments are similar to the descriptions of the above method embodiments, and have similar beneficial effects to the method embodiments. For technical details not disclosed in the device embodiments of the present application, please refer to the descriptions of the method embodiments of the present application for understanding.

It should be noted that the division of modules by the apparatus described in the embodiments of the present application is schematic, and is only a logical function division, and other division methods may be used in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or may exist independently physically, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units. It can also be implemented in the form of a combination of software and hardware.

It should be noted that, in the embodiments of the present application, if the above method is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of software products in essence or the parts that contribute to related technologies. The computer software products are stored in a storage medium and include several instructions to make The electronic device executes all or part of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read only memory (Read Only Memory, ROM), a magnetic disk or an optical disk and other media that can store program codes. As such, the embodiments of the present application are not limited to any specific combination of hardware and software.

An embodiment of the present application provides an electronic device. FIG. 12 is a schematic diagram of a hardware entity of the electronic device according to an embodiment of the present application. As shown in FIG. 12 , the electronic device 120 includes a memory 121 and a processor 122 , and the memory 121 stores A computer program that can be executed on the processor 122, and when the processor 122 executes the program, implements the steps in the methods provided in the above-described embodiments.

It should be noted that the memory 121 is configured to store instructions and applications executable by the processor 122, and can also cache data to be processed or processed by the processor 122 and each module in the electronic device 120 (eg, image data, audio data, etc.). , voice communication data and video communication data), which can be realized by flash memory (FLASH) or random access memory (Random Access Memory, RAM).

Embodiments of the present application provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the steps in the methods provided in the foregoing embodiments.

The embodiments of the present application provide a computer program product containing instructions, which, when run on a computer, cause the computer to execute the steps in the methods provided by the above method embodiments.

It should be pointed out here that the descriptions of the above storage medium and device embodiments are similar to the descriptions of the above method embodiments, and have similar beneficial effects to the method embodiments. For technical details not disclosed in the embodiments of the storage medium, storage medium and device of the present application, please refer to the description of the method embodiments of the present application for understanding.

It should be understood that references throughout the specification to "one embodiment" or "an embodiment" or "some embodiments" mean that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present application . Thus, appearances of "in one embodiment" or "in an embodiment" or "in some embodiments" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation. The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments. The above descriptions of the various embodiments tend to emphasize the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, details are not repeated herein.

The term "and/or" in this article is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, such as object A and/or object B, it can mean that object A exists alone, and object A and object exist simultaneously B, there are three cases of object B alone.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described embodiments are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined, or Integration into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be electrical, mechanical or other forms. of.

The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules; they may be located in one place or distributed to multiple network units; Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional module in each embodiment of the present application may all be integrated in one processing unit, or each module may be separately used as a unit, or two or more modules may be integrated in one unit; the above integration The module can be implemented in the form of hardware, or it can be implemented in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, the execution includes: The steps of the above method embodiments; and the aforementioned storage medium includes: a removable storage device, a read only memory (Read Only Memory, ROM), a magnetic disk or an optical disk and other media that can store program codes.

Alternatively, if the above-mentioned integrated units of the present application are implemented in the form of software function modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of software products in essence or the parts that contribute to related technologies. The computer software products are stored in a storage medium and include several instructions to make The electronic device executes all or part of the methods described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a removable storage device, a ROM, a magnetic disk, or an optical disk.

The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined under the condition of no conflict to obtain new method embodiments.

The features disclosed in the several product embodiments provided in this application can be combined arbitrarily without conflict to obtain a new product embodiment.

The features disclosed in several method or device embodiments provided in this application can be combined arbitrarily without conflict to obtain new method embodiments or device embodiments.

The above is only the embodiment of the present application, but the protection scope of the present application is not limited to this. Covered within the scope of protection of this application.

Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (20)

1. A wireless charging method, the method comprising:

   Get the battery temperature of the electronic device;

   Controlling at least a first receive coil to couple with a transmit coil of a wireless charging device to charge a battery of the electronic device based on determining that the battery temperature is less than a first threshold; and

   Based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold, at least a second receiving coil is controlled to couple with the transmitting coil to charge the battery; wherein the first receiving coil is The impedance is greater than the impedance of the second receiving coil.
2. The method of claim 1, wherein,

   Based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold and less than a second threshold, the first receiving coil and the second receiving coil are coupled to the transmitting coil for all to charge the battery.
3. The method of claim 2, wherein,

   Decoupling the first receive coil from the transmit coil and coupling with the transmit coil through the second receive coil based on determining that the battery temperature of the electronic device has risen to greater than or equal to a second threshold, to charge the battery; wherein the second threshold is greater than the first threshold.
4. 4. The method of claim 3, wherein based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to a second threshold, the second receive coil is coupled to the transmit coil to conduct the battery Charge, including:

   Based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to a second threshold, the power supplied to the second receiving coil is controlled to be the first power; wherein the first power is greater than a specific power value, the specific power The value is the power value corresponding to when the battery temperature is greater than or equal to the first threshold and less than the second threshold;

   The induced current generated by the second receiving coil is converted into a first charging current to charge the battery; wherein, the first charging current is greater than the charging current corresponding to the specific power value.
5. The method of claim 3, wherein,

   The second threshold value is less than or equal to the upper limit value of the safe temperature of the battery.
6. The method of claim 1, wherein,

   Based on determining that the temperature of the battery of the electronic device has risen to be greater than or equal to the first threshold and less than a second threshold, the first coil is decoupled from the transmit coil, and the second receive coil is coupled to the The transmit coil is coupled to charge the battery.
7. The method according to claim 1 or 2, wherein,

   When charging the battery through the first receiving coil, the current flowing into the battery is controlled to be less than or equal to the current that can be tolerated by the tabs of the battery.
8. The method according to claim 1, wherein the obtaining the battery temperature of the electronic device comprises:

   Receive an opening instruction; wherein, the opening instruction is used to instruct to open the heating mode or the fast charging mode;

   In response to the turn-on instruction, a battery temperature of the electronic device is obtained.
9. 8. The method of claim 1 or 8, wherein said coupling with said transmit coil via a second receive coil to charge said battery comprises:

   coupled to the transmit coil through the second receive coil; and

   Controlling the power supplied to the second receiving coil to be a second power; wherein, the second power is equal to a specific power value, and the specific power value is greater than or equal to the first threshold and less than the battery temperature the power value corresponding to the second threshold;

   The induced current generated by the second receiving coil is converted into a second charging current to charge the battery; wherein, the second charging current is equal to the charging current corresponding to the specific power value.
10. The method according to any one of claims 1 to 6, wherein,

    Based on determining that the battery temperature is less than a first threshold, the first coil and the second receive coil are coupled to the transmit coil to charge the battery of the electronic device.
11. An electronic device, comprising: a processor, a first receiving coil, a second receiving coil and a battery; wherein the impedance of the first receiving coil is greater than the impedance of the second receiving coil;

    The processor is configured to: acquire the battery temperature; and based on determining that the battery temperature is less than a first threshold, at least control the first receiving coil to be coupled with a transmitting coil of a wireless charging device to perform a battery operation on the battery. charging; and controlling at least a second receive coil to couple with the transmit coil to charge the battery based on determining that the battery temperature rises to be greater than or equal to the first threshold.
12. The device according to claim 11, further comprising a receiving module, a resonant capacitor, a first switch and a second switch; wherein the first receiving coil and the second receiving coil are parallel and independent cables ;

    The first ends of the first receiving coil and the second receiving coil are connected to the receiving module, the second end of the first receiving coil is connected to the first end of the first switch, and the first The second end of the switch is connected to the first end of the resonant capacitor, and the second end of the resonant capacitor is connected to the receiving module;

    The second end of the second receiving coil is connected to the first end of the second switch, the second end of the second switch is connected to the first end of the resonant capacitor, and the second end of the resonant capacitor connected with the receiving module.
13. The device according to claim 11, further comprising a receiving module, a resonance capacitor, a first switch and a second switch; wherein,

    The first receiving coil and the second receiving coil belong to the same tap coil, the tap coil includes a first end, a second end and a middle tap, and the coil between the first end and the second end serves as the a first receiving coil, the coil between the first end and the middle tap serves as the second receiving coil;

    The first end of the tap coil is connected to the receiving module, the second end of the tap coil is connected to the first end of the first switch, and the second end of the first switch is connected to the resonant capacitor. The first end is connected, the middle tap is connected to the first end of the second switch, the second end of the second switch is connected to the first end of the resonant capacitor, and the second end of the resonant capacitor is connected to the first end of the resonant capacitor. The receiving module is connected.
14. An apparatus according to claim 12 or 13, wherein,

    the processor for at least turning on the first switch to couple the first receive coil with the transmit coil based on determining that the battery temperature is less than a first threshold; and based on determining the battery temperature rising to a value greater than or equal to the first threshold, at least turning on the second switch to couple the second receiving coil with the transmitting coil;

    The first receiving coil and the second receiving coil are used for receiving electromagnetic signals emitted by the transmitting coil when coupled with the transmitting coil, thereby outputting an induced current to the resonant capacitor;

    the resonant capacitor is used to convert the induced current into a resonant current and output it to the receiving module;

    The receiving module is configured to convert the input resonant current into a direct current and output it to the battery.
15. 15. The device of claim 14, wherein the processor is configured to open the first switch based on determining that the temperature of the battery of the electronic device has risen to greater than or equal to a second threshold.
16. 15. The apparatus of claim 14, wherein the processor is configured to turn on the second switch based on determining that the battery temperature is less than a first threshold.
17. A wireless charging device, the device includes:

    The temperature acquisition module is used to acquire the battery temperature of the electronic device;

    a first charging module, configured to control at least a first receiving coil to be coupled with a transmitting coil of a wireless charging device to charge a battery of the electronic device based on determining that the battery temperature is less than a first threshold; and

    a second charging module, configured to control at least a second receiving coil to couple with the transmitting coil to charge the battery based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold; wherein , the impedance of the first receiving coil is greater than the impedance of the second receiving coil.
18. 18. The apparatus of claim 17, wherein a second charging module is configured to control a second receiving coil to couple with the transmitting coil based on determining that the temperature of the battery of the electronic device rises to be greater than or equal to the first threshold , disconnect the coupling between the second receiving coil and the transmitting coil.
19. An electronic device includes a memory and a processor, the memory stores a computer program executable on the processor, and the processor implements the method of any one of claims 1 to 10 when the processor executes the program.
20. A computer-readable storage medium having a computer program stored thereon, the computer program implementing the method of any one of claims 1 to 10 when executed by a processor.

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