CN112994173B - Wireless charging method and device, equipment and storage medium - Google Patents

Wireless charging method and device, equipment and storage medium Download PDF

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Publication number
CN112994173B
CN112994173B CN202110363815.6A CN202110363815A CN112994173B CN 112994173 B CN112994173 B CN 112994173B CN 202110363815 A CN202110363815 A CN 202110363815A CN 112994173 B CN112994173 B CN 112994173B
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battery
coil
receiving coil
temperature
receiving
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CN112994173A (en
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杨军
谢红斌
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202110363815.6A priority Critical patent/CN112994173B/en
Publication of CN112994173A publication Critical patent/CN112994173A/en
Priority to PCT/CN2022/080006 priority patent/WO2022206326A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The embodiment of the application discloses a wireless charging method, a wireless charging device, equipment and a storage medium; wherein the method comprises the following steps: acquiring the battery temperature of the electronic equipment; under the condition that the temperature of the battery is lower than a first threshold value, the battery is coupled with a transmitting coil of a wireless charging device through a first receiving coil, so that the battery of the electronic device is charged; and when the temperature of the battery of the electronic equipment rises to be greater than or equal to the first threshold value, the battery is charged by coupling a second receiving coil with the transmitting coil; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.

Description

Wireless charging method and device, equipment and storage medium
Technical Field
The embodiment of the application relates to electronic technology, and relates to but is not limited to a wireless charging method, a wireless charging device, equipment and a storage medium.
Background
In a low-temperature environment, the battery activity of electronic devices such as mobile phones and tablet computers is deteriorated, resulting in a slow charging speed. In addition, recently, a lot of fast charging complaints of users are often received, and the external temperature is too low in cold winter in the north, so that the charging speed of the mobile phone is limited.
Disclosure of Invention
In view of this, the wireless charging method, the wireless charging device, the wireless charging apparatus, and the wireless charging storage medium according to the embodiments of the present application can improve heating efficiency, shorten heating time, further shorten charging time, and improve charging efficiency. The wireless charging method, the wireless charging device, the wireless charging equipment and the wireless charging storage medium are realized as follows:
the wireless charging method provided by the embodiment of the application comprises the following steps: acquiring the battery temperature of the electronic equipment; under the condition that the temperature of the battery is lower than a first threshold value, coupling a first receiving coil with a transmitting coil of a wireless charging device so as to charge the battery of the electronic device; and when the temperature of the battery of the electronic equipment rises to be greater than or equal to the first threshold value, the battery is charged by coupling a second receiving coil with the transmitting coil; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
The electronic equipment that this application embodiment provided includes: the device comprises a processor, a first receiving coil, a second receiving coil and a battery; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil; the first receiving coil is abutted against the surface of the battery; the processor is configured to: acquiring the temperature of the battery; and in the case that the battery temperature is less than a first threshold value, coupling the first receiving coil with a transmitting coil of a wireless charging device so as to charge the battery; and when the temperature of the battery rises to be greater than or equal to the first threshold value, the battery is charged through coupling of a second receiving coil and the transmitting coil.
The embodiment of the application provides a wireless charging device, includes: the temperature acquisition module is used for acquiring the battery temperature of the electronic equipment; the first charging module is used for coupling with a transmitting coil of wireless charging equipment through a first receiving coil under the condition that the temperature of the battery is smaller than a first threshold value so as to charge the battery of the electronic equipment; the second charging module is used for coupling the second receiving coil with the transmitting coil to charge the battery under the condition that the temperature of the battery of the electronic equipment rises to be greater than or equal to the first threshold value; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
The electronic device provided by the embodiment of the application comprises a memory and a processor, wherein the memory stores a computer program which can run on the processor, and the processor executes the program to realize the method provided by the embodiment of the application.
The computer readable storage medium provided by the embodiment of the present application has a computer program stored thereon, and the computer program is used for implementing the method provided by the embodiment of the present application when being executed by a processor.
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, and a small part of the received electromagnetic signal is converted into an induced current to charge the battery; therefore, in the first stage, namely when the battery temperature is smaller than the first threshold value, the first receiving coil is selected to be coupled with the transmitting coil of the wireless charging equipment, so that the rapid heating effect can be achieved, the heating efficiency is improved, the heating time is shortened, the battery temperature can be increased to be higher than the first threshold value (namely, the battery temperature is larger than or equal to the first threshold value) more rapidly, the charging time is shortened, and the charging efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another electronic device according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another electronic device according to an embodiment of the present application;
fig. 4 is a schematic flowchart illustrating an implementation process of a wireless charging method according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart illustrating another implementation of a wireless charging method according to an embodiment of the present application;
fig. 6 is a schematic flow chart illustrating an implementation of another wireless charging method according to an embodiment of the present application;
FIG. 7 is a schematic structural diagram of a mobile phone;
FIG. 8 is a schematic structural diagram of another electronic device according to an embodiment of the present application;
FIG. 9 is a schematic structural diagram of another electronic device according to an embodiment of the present application;
FIG. 10 is a graph comparing the charging time periods of the heating and non-heating of the examples of the present 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 according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 intended to illustrate the present application, but are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the 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" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
It should be noted that the terms "first \ second \ third" are used herein to distinguish similar or different objects and do not denote a particular ordering with respect to the objects, and it should be understood that "first \ second \ third" may be interchanged in a particular order or sequence as permitted so that embodiments of the present application described herein may be practiced in other than the order shown or described herein.
The embodiment of the application provides an electronic device first, and this electronic device can be various types of equipment that have a battery at the in-process of implementing, for example electronic device can include intelligent mobile terminal (for example cell-phone), portable power source (for example, treasured or travel charging), electric automobile, notebook computer, unmanned aerial vehicle, panel computer, electronic book, electron cigarette, intelligent electronic equipment (for example wrist-watch, bracelet, intelligent glasses or robot of sweeping the floor etc.) and small-size electronic product (for example, wireless earphone, bluetooth stereo set, electric toothbrush or chargeable wireless mouse etc.). Of course, the electronic device may be other devices with charging requirements besides the above devices.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and 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 impedance of the first receiving coil 102 is greater than the impedance of the second receiving coil 103;
a processor 101 for: acquiring the temperature of the battery; and in case the battery temperature is less than a first threshold, coupling with a transmitting coil of the wireless charging device through the first receiving coil 102, thereby charging the battery 104; and when the temperature of the battery rises to be greater than or equal to the first threshold value, the battery 104 is charged by coupling the second receiving coil 103 with the transmitting coil.
As can be appreciated, the impedance of the first receiving coil 102 is greater than the impedance of the second receiving coil 103, such that when the first receiving coil 102 is coupled with the transmitting coil of the wireless charging device, the received electromagnetic signal is converted into more heat, and a small portion is converted into an induced current to charge the battery 104; therefore, in the first stage, namely when the battery temperature is smaller than the first threshold, the first receiving coil 102 is selected to be coupled with the transmitting coil of the wireless charging device, so that the rapid heating effect can be achieved, the heating efficiency is improved, the heating time is shortened, the battery temperature can rise more rapidly than the first threshold, the charging time is shortened, and the charging efficiency is improved. Of course, in some embodiments, in the case that the battery temperature is less than the first threshold, the second receiving coil 103 may also be turned on to couple with the transmitting coil, that is, both the first receiving coil 102 and the second receiving coil 103 are coupled with the transmitting coil, so that the charging rate is increased by using the second receiving coil 103 while the battery is rapidly heated by the first receiving coil 102.
For example, as shown in table 1, in example 1, when the battery temperature T is less than the first threshold, the battery is coupled with the transmitting coil only through the first receiving coil 102, and the corresponding charging power is P a (ii) a In example 2, 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 with the transmitting coil, and the corresponding charging power is P b (ii) a Wherein, P b ＞P a 。
TABLE 1
Temperature T of battery Working coil Charging power
Example 1 T < first threshold First receiving coil 102 P a
Example 2 T < first threshold A first receiving coil 102 and a second receiving coil 103 P b
The battery temperature T further rises, and 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, the first receiving coil 102 may be decoupled from the transmitting coil only by coupling the second receiving coil 103 with the transmitting coil, and the corresponding charging power P is c (ii) a In example 4, when the battery temperature T rises to be greater than or equal to the first threshold value and less than the second threshold value, the first receiving coil 102 and the transmitting coil may not be decoupled, but may be coupled only by the first receiving coil 102 and the transmitting coil, and the corresponding charging power is P a (ii) a In example 5, when the battery temperature T rises to be greater than or equal to the first threshold value and less than the second threshold value, the respective charging powers P are coupled with the transmission coil through the first and second reception coils 102 and 103 d (ii) a Wherein, P a ＜P b ＜P c ≤P d ；
TABLE 2
Temperature T of battery Working coil Charging power
Example 3 T is greater than or equal to the first threshold value Second receiving coil 103 P c
Example 4 The second threshold value is larger than T and is larger than or equal to the first threshold value First receiving coil 102 P a
Example 6 T is greater than or equal to the second threshold value Second receiving coil 103 P e
Example 5 The second threshold value is larger than T and is larger than or equal to the first threshold value A first receiving coil 102 and a second receiving coil 103 P d
Example 7 T is greater than or equal to the second threshold value Second receiving coil 103 P e
The battery temperature T further rises, and 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 coupling of the first receiving coil 102 and the transmitting coil is turned off, the coupling of the second receiving coil 103 and the transmitting coil is turned on, and the corresponding charging power is P e (ii) a Based on example 5, in example 7, when the battery temperature T rises above the second threshold, only the first receiving coil 102 is decoupled from the transmitting coil, the operating coil is the second receiving coil 103 at this time, i.e. the operating coil is coupled with the transmitting coil only through the second receiving coil 103, and the corresponding charging power is P e (ii) a Wherein, P e ＞P d 。
It should be noted that, in each temperature phase of the above example, the charging power may also be non-fixed, and the charging power may be adaptively increased as the temperature increases. The above examples for different temperature phases may be combined arbitrarily throughout the charging process.
The manner in which the processor 101 obtains the battery temperature may be varied. For example, the processor 101 obtains the battery temperature from a temperature sensor that measures the temperature of the battery 104; for another example, the processor 101 may further obtain the battery temperature from a temperature sensor for measuring the overall temperature of the electronic device, that is, the overall temperature is taken as the battery temperature; as another example, the processor 101 may also communicate with the wireless charging device to obtain the battery temperature from the wireless charging device, that is, the external environment temperature measured by the wireless charging device is taken as the battery temperature; as another example, processor 101 may also determine the battery temperature based on the current temperature forecasted by the weather forecast application.
The battery temperature being below the first threshold tends to affect the rate of charging of the battery. For example, the first threshold is the highest temperature that does not meet the standard fast fill condition. The standard fast-fill condition is a condition predefined by a designer of the electronic device. For example, if the standard quick charge condition is that the battery temperature of the standard quick charge cannot be lower than 10 ℃, the first threshold is 10 ℃. In the embodiment of the present application, the size of the first threshold is not limited.
In the embodiment of the present application, the relationship with respect to the first receiving coil and the second receiving coil may be various. For example, in the following embodiments, the first receiving coil 202 and the second receiving coil 203 may be wound in parallel and independently; as another example, the first receiving coil 302 and the second receiving coil 303 belong to the same tap coil, but the length of the first receiving coil 302 is greater than the length of the second receiving coil 303.
The positions of the first receiving coil 102 and the second receiving coil 103 are not limited, and may be any positions. In some embodiments, the first receiving coil 102 abuts a surface of the battery 104; the second receiving coil 103 may be attached to the surface of the battery 104 or may be spaced from the battery 104.
Fig. 2 is a schematic structural diagram of the electronic device provided in the embodiment of the present application, and as shown in fig. 2, the electronic device 20 includes: a processor 201, a first receiving coil 202, a second receiving coil 203, a battery 204, a receiving module 205, a resonant capacitor 206, a first switch 207 and a second switch 208; wherein the impedance of the first receiving coil 202 is greater than the impedance of the second receiving coil 203; the first receiving coil 202 is attached to the surface of the battery 204, and the first receiving coil 202 and the second receiving coil 203 are independent cables connected in parallel.
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 larger than the impedance of the second receiving coil 203. In some embodiments, in the case that the model of the first receiving coil 202 is the same as the model 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, 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 charged. For example, the first receiving coil 202 has 1 strand, and the second receiving coil 203 has N strands (N is greater than 1), so that the heat energy generated by the first receiving coil 202 is N times the heat energy generated by the second receiving coil 203 when the same current flows through both the coils. In the case of high-power charging, it is obvious that the charging efficiency of the single-stranded wire is too low, the heat generation is very serious, and the charging efficiency is affected, but in the case of needing the single-stranded wire to heat the battery, the heating effect can be achieved by adopting the single-stranded wire.
In other embodiments, in the case that 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 number of strands of the first receiving coil 202 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 charged.
In still other embodiments, the first receive coil 202 may be a different type than the second receive coil, but the impedance of the first receive coil 202 is greater than the impedance of the second receive coil 203 for the same length and same number of strands.
In summary, in the present application, how to design the relationship between the first receiving coil 202 and the second receiving coil 203 is not limited, and may be any as long as the impedance of the first receiving coil 202 is ensured to be larger than the impedance of the second receiving coil 203.
First ends of the first receiving coil 202 and the second receiving coil 203 are connected to the receiving module 205, a second end of the first receiving coil 202 is connected to a first end of a first switch 207, a second end of the first switch 207 is connected to a first end of a resonant capacitor 206, and a second end of the resonant capacitor 206 is connected to the receiving module 205;
a second end of the second receiving coil 203 is connected to a first end of a second switch 208, a second end of the second switch 208 is connected to a first end of a resonant capacitor 206, and a second end of the resonant capacitor 206 is connected to the receiving module 205;
a processor 201, configured to obtain a battery temperature, and if the battery temperature is less than a first threshold, turn on a first switch 207 to couple the first receiving coil 202 with the transmitting coil; when the battery temperature rises to be greater than or equal to the first threshold, the second switch 208 is turned on to couple the second receiving coil 203 with the transmitting coil.
In the case where the battery temperature is less 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 both the first switch 207 and the second switch 208 to be turned on. In the case that 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 also control both the first switch 207 and the second switch 208 to be turned on, and when the battery temperature continues to rise to be greater than or equal 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 turned off; wherein the second threshold is less than or equal to an upper limit value of a safe temperature of the battery; thus, charging efficiency can be improved and 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 above the second threshold, the first switch 207 is controlled to be turned off and the second switch 208 is controlled to be 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 on, and when the battery temperature continues to rise above the second threshold, the processor 201 controls the first switch 207 to be off and the second switch 208 to continue to be in the on state.
When the temperature of the battery rises above the first threshold, the first switch 207 and the second switch 208 are both turned on, which does not affect the charging efficiency, and the battery can be continuously heated, 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 equal to or higher than the first threshold value and lower than the second threshold value, the battery is charged at a charge rate of 1.5C, and when the battery temperature rises to the second threshold value or higher, the battery is charged at a charge rate of 3.0C.
In some embodiments, when the temperature of the battery rises to the second threshold, the first switch 207 is turned off, i.e., the first receiving coil 202 is disconnected from the transmitting coil, so as to stop further heating of the battery; wherein the second threshold value is less than or equal to an upper limit value of a safe temperature of the battery; thus, charging safety can be improved.
A first receiving coil 202 and a second receiving coil 203 for receiving the electromagnetic signal transmitted by the transmitting coil when coupled with the transmitting coil, thereby outputting an induced current to the resonant capacitor 206;
a resonant capacitor 206, configured to convert the induced current into a resonant current, and output the resonant current to the receiving module 205;
and the receiving module 205 is configured to convert the input resonant current into a direct current and output the direct current 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 determining 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 is used to instruct the receiving module 205 to output a third charging current to the battery; when determining that the battery temperature rises above the first threshold and is less than the second threshold, the processor 201 turns on the first switch 207 and the second switch 208, and sends a second instruction to the receiving module 205; the second instruction is used for instructing the receiving module 205 to output a second charging current to the battery; next, when determining that the battery temperature continues to rise above the second threshold, the processor 201 turns off the first switch 207, so as to stop heating the battery, and sends a third instruction to the receiving module 205; 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 charge current < the second charge current < the first charge current. In some embodiments, the second charging current is a standard fast charging current predefined by a designer of the electronic device. For example, the standard fast charging current corresponds to a charging rate of 1.5C, the first charging current corresponds to a charging rate of 3C, and the third charging current corresponds to a charging rate of 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 defined value.
An electronic device is further provided in the embodiment of the present application, and fig. 3 is a schematic structural diagram of the electronic device provided in the embodiment of the present application, and as shown in fig. 3, the electronic device 30 includes: a processor 301, a first receiving coil 302 (not shown in the figure), a second receiving coil 303 (not shown in the figure), a battery 304, a receiving module 305, a resonant capacitor 306, a first switch 307 and a second switch 308; wherein, the first and the second end of the pipe are connected with each other,
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, the coil between the first end and the second end serves as the first receiving coil 302, and the coil between the first end and the middle tap serves as the second receiving coil 303.
In the present application, the number of the strands of the tap coil 309 is not limited, and may be 1 strand or a plurality of strands. The number of strands of the receive coil is identical to the number of strands of the tap coil 309. It can be understood that the coil between the first end and the second end of the tapped coil 309 serves as the first receiving coil 302, and the coil between the first end and the middle tap serves as the second receiving coil 303, so that the length of the first receiving coil 302 is greater than the length of the second receiving coil 303, and thus the impedance of the first receiving coil 302 is greater than the impedance of the second receiving coil 303 when the electronic device is charged, and further the first receiving coil 302 can generate more heat, thereby achieving efficient heating of the battery.
A first end of the tap coil 309 is connected to the receiving module 305, a second end of the tap coil 309 is connected to a first end of a first switch 307, a second end of the first switch 307 is connected to a first end of a resonant capacitor 306, the center tap is connected to a first end of the second switch, a second end of the second switch is connected to a first end of the resonant capacitor 306, and a second end of the resonant capacitor 306 is connected to the receiving module 305;
a processor 301, configured to obtain a battery temperature, and if the battery temperature is less than a first threshold, turn on a first switch 307, so as to couple the first receiving coil 302 with the transmitting coil; when the battery temperature rises above a first threshold, the second switch 308 is turned on to couple the second receiving coil 303 with the transmitting coil.
Similarly to the previous embodiment, in case 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 may also control both the first switch 307 and the second switch 308 to be turned on. In the event that the battery temperature rises above the first threshold, in some embodiments, the processor 301 may control the first switch 307 to be off and the second switch 308 to be on, or the processor 301 may also control both the first switch 307 and the second switch 308 to be 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 above the second threshold, the first switch 307 is controlled to be turned off and the second switch 308 is controlled to be 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 both the first switch 307 and the second switch 308 to be on, and when the battery temperature continues to rise above the second threshold, the processor 301 controls the first switch to be off and the second switch to continue to be on.
When the temperature of the battery rises above the first threshold, the first switch 307 and the second switch 308 are both turned on, which does not affect the charging efficiency, and the battery can be continuously heated, 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 equal to or higher than the first threshold value and lower than the second threshold value, the battery is charged at a charge rate of 1.5C, and when the battery temperature rises to the second threshold value or higher, the battery is charged at a charge rate of 3.0C.
A first receiving coil 302 and a second receiving coil 303, for receiving the electromagnetic signal transmitted by the transmitting coil when coupled with the transmitting coil, thereby outputting an induced current to the resonant capacitor 306;
a resonant capacitor 306, configured to convert the induced current into a resonant current, and output the resonant current to the receiving module 305;
the receiving module 305 is configured to convert the input resonant current into a direct current and output the direct current 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 charge rate the battery should be charged at the current stage. For example, when determining that the battery temperature is less 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 a first instruction to the receiving module 305; wherein, the first instruction is used to instruct the receiving module 305 to output a third charging current to the battery; when determining that the battery temperature rises from the first temperature interval to a value greater than or equal to a first threshold and smaller than a second threshold, the processor 301 turns on the first switch 307 and the second switch 308, and sends a second instruction to the receiving module 305; the second instruction is used for instructing the receiving module 305 to output a second charging current to the battery; next, when determining that the battery temperature rises above the second threshold, the processor 201 turns off the first switch 307, thereby stopping heating the battery, and sends a third instruction to the receiving module 305; the third instruction is used to instruct the receiving module 305 to output the first charging current to the battery.
In the above example, the third charge current < the second charge current < the first charge current. For example, the second charging current is a standard fast charging current predefined by a designer of the electronic device.
The embodiment of the present application provides a wireless charging method, which is applied to the electronic device, where the functions implemented by the method may be implemented by a processor in the electronic device calling a program code, and of course, the program code may be stored in a computer storage medium, and thus, the electronic device at least includes the processor and the storage medium.
Fig. 4 is a schematic flow chart of an implementation of the wireless charging method according to the embodiment of the present application, as shown in fig. 4, the method may include the following steps 401 to 403:
step 401, acquiring a battery temperature of the electronic device.
In the embodiment of the present application, the timing when the electronic device acquires the battery temperature is not limited. In some embodiments, the electronic device obtains the battery temperature upon detecting that communication is established with or proximate to the wireless charging device. In other embodiments, upon detecting that communication is established with or proximate to the wireless charging device, the battery voltage is below a threshold, the charging current of the battery is below a threshold, and/or the battery charge is below a threshold, etc.
In the charging state of the bright screen, which indicates that the user is operating the electronic device, the load of the processor is increased to heat the main board, so that the temperature of the battery is increased, and the battery may not be heated at this time.
In the charging state of the screen-off state, the user does not operate the electronic equipment, and the load of the processor is lowest to achieve the purpose of energy conservation, so that the temperature rise of the mainboard is not obvious. If the ambient temperature is too low, the battery cannot be charged or is slowly charged, so that the temperature rise of the battery is not obvious. Optionally, the battery temperature is obtained while the electronic device is in a charging state with the screen off.
And step 402, in the case that the battery temperature is less than a first threshold, coupling a first receiving coil with a transmitting coil of a wireless charging device, thereby charging a battery of the electronic device.
It will be appreciated that the first receiving coil, when coupled to the transmitting coil, will also convert a portion of the received electromagnetic energy into thermal energy, and the temperature of the first receiving coil will rise, thereby effecting heating of the battery. As described in the foregoing embodiments, the first receiving coil may be attached to the surface of the battery, which can reduce the conduction path of the thermal energy, reduce the loss of the thermal energy, and thus heat the battery more efficiently.
For step 402, the electronic device may select only the first receive coil to couple with the transmit coil, or may select the first receive coil and the second receive coil to couple with the transmit coil. With respect to the latter approach, in some embodiments, the electronic device may gradually increase the current to the battery as the temperature of the battery gradually increases, thereby shortening the charging period.
Step 403, in the case that the temperature of the battery of the electronic device rises to be greater than or equal to a first threshold value, coupling the battery with the transmitting coil through a second receiving coil so as to charge the battery; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
In some embodiments, the electronic device may select only the second receiving coil to be coupled with the transmitting coil and disconnect the first receiving coil from the transmitting coil when the battery temperature continues to rise above the first threshold and below the second threshold, during which the power supply to the second receiving coil is controlled to the second power; the second power is equal to a specific power value, wherein the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and smaller than the second threshold; converting the induced current generated by the second receiving coil into a second charging current to charge the battery; and the second charging current is equal to the charging current corresponding to the specific power value. For example, the second charging current corresponds to a charging rate of 1.5C.
In other embodiments, when the temperature of the battery 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 continuing to heat the battery, during which the electronic device may 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 temperature of the battery continues to rise above a second threshold, disconnecting the coupling between the first receiving coil and the transmitting coil, maintaining the coupling between the second receiving coil and the transmitting coil, and during the period, supplying power to the second receiving coil by the electronic equipment at first power higher than second power, and converting induced current generated by the second receiving coil into first charging current to charge the battery; 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; therefore, on the premise of ensuring charging safety, the charging time can be greatly shortened, and the charging efficiency is improved.
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, and a small part of the received electromagnetic signal is converted into an induced current to charge the battery; so, in the first stage, when the battery temperature was less than first threshold value promptly, select first receiving coil and wireless battery charging outfit's transmitting coil looks coupling, can play the effect of rapid heating to improve heating efficiency, shorten the length of time of heating, make the battery temperature rise to more than first threshold value more fast, and then shorten the length of time of charging, improve charge efficiency.
Fig. 5 is a schematic flow chart illustrating an implementation of the wireless charging method provided in the embodiment of the present application, and as shown in fig. 5, the method may include the following steps 501 to 505:
step 501, acquiring the battery temperature of the electronic equipment;
step 502, selecting a first receiving coil to be coupled with a transmitting coil of a wireless charging device when the battery temperature is less than a first threshold value, so as to charge a battery of the electronic device.
In some embodiments, the electronic device may select the first receive coil and the second receive coil to couple with the transmit coil; therefore, more induced current can be generated, and under the condition that the charging condition (such as the temperature of the battery) allows, the battery is charged by using larger current, so that the charging efficiency is improved, and the charging time is shortened.
Step 503, when the temperature of the battery of the electronic device rises above a first threshold and is less than a second threshold, the battery is still charged through the first receiving coil until the temperature of the battery of the electronic device rises above the second threshold, the first receiving coil and the transmitting coil are disconnected, and the battery is coupled through the second receiving coil and the transmitting coil; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
In some embodiments, step 503 may be implemented as: when the temperature of the battery rises above a first threshold value and is smaller than a second threshold value, the battery is charged only through the first receiving coil, or the battery is charged through the first receiving coil and the second receiving coil until the temperature of the battery rises above the second threshold value, the first receiving coil and the transmitting coil are disconnected, and the second receiving coil and the transmitting coil are kept coupled.
In some embodiments, the second threshold is less than or equal to an upper limit value of a safe temperature of the battery. For example, the upper limit value of the safe temperature of the battery is 60 ℃, then the second threshold value may be set to a value less than or equal to 60 ℃; in this way, when the temperature of the battery rises to be higher than the second threshold value, the first receiving coil is disconnected from the transmitting coil, so that the battery is stopped from being heated, and the charging safety is enhanced.
Step 504, controlling the power supply power to the second receiving coil to be first power; the first power is greater than a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and less than the second threshold;
step 505, converting the induced current generated by the second receiving coil into a first charging current to charge the battery; and the first charging current is larger than the charging current corresponding to the specific power value.
In some embodiments, the first charging current corresponds to a charging rate greater than a charging rate corresponding to a particular power value. For example, the first charging current corresponds to a charging rate of 3C, and the specific power value corresponds to a charging rate of 1.5C.
In some embodiments, when the battery is charged through the first receiving coil, the current passing through the battery is controlled to be less than or equal to the current which can be endured by the tabs of the battery; thus, the charging safety can be ensured.
An embodiment of the present application further provides a wireless charging method, and fig. 6 is a schematic implementation flow diagram of the wireless charging method provided in the embodiment of the present application, and as shown in fig. 6, the method may include the following steps 601 to 606:
step 601, receiving a starting instruction; the starting instruction is used for indicating starting a heating mode or a quick charging mode; the heating mode refers to a mode in which the first receiving coil is coupled with the transmitter, and the fast charging mode refers to a mode in which the battery is charged by a predefined fast charging strategy, for example, the battery is charged by a preset charging voltage.
Step 602, responding to the starting instruction, and acquiring the battery temperature of the electronic equipment;
step 603, in a case that the battery temperature is less than a first threshold, coupling a first receiving coil with a transmitting coil of a wireless charging device, thereby charging a battery of the electronic device;
in some embodiments, the electronics can 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, the heating is a precondition, and in the case that the user instructs the heating or instructs to start the fast charging mode, and the temperature of the battery is less than the first threshold, the first receiving coil is selected to be coupled with the transmitting coil, so as to heat the battery; thus, it is possible to prevent the internal structure of the battery from being changed at high temperature, such as the rapid consumption of the electrolyte.
Step 604, coupling a second receiving coil with the transmitting coil when the battery temperature of the electronic device rises above a first threshold;
step 605, controlling the power supply power to the second receiving coil to be a second power; the second power is equal to a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and smaller than the second threshold;
step 606, converting the induced current generated by the second receiving coil into a second charging current to charge the battery; the second charging current is equal to the charging current corresponding to the specific power value; for example, the charging current corresponds to a charging rate of 1.5C.
The above description of the method embodiment, similar to the above description of the apparatus embodiment, has similar beneficial effects as the apparatus embodiment. For technical details which are not disclosed in the method embodiments of the present application, reference is made to the description of the embodiments of the apparatus of the present application for understanding.
In a low-temperature environment, the battery cannot be charged quickly, or the normal operation of the battery is affected when the temperature is too low. Recently, a fast charging complaint of a mobile phone user is often received, and the external temperature is too low in cold winter in the north, so that the charging speed of the mobile phone is limited. Because the temperature is too low, on one hand, the reaction speed in the battery is reduced, and therefore, the quick charge cannot be realized, on the other hand, lithium is precipitated at the negative electrode under the low-temperature environment, the capacity of the battery is lost, and simultaneously, the precipitated lithium dendrites may penetrate through the diaphragm, so that the safety problem is caused, which is also the main reason for limiting the low-temperature quick charge.
Based on this, an exemplary application of the embodiment of the present application in a practical application scenario will be described below.
The embodiment of the application provides a self-heating charging device which utilizes a wireless charging coil to firstly heat a battery to a target charging temperature and then utilizes corresponding charging current to charge the battery on the premise of not additionally changing the structure of the battery. On one hand, the charging speed of the battery at low temperature can be improved, and meanwhile, the rated charging rate of the battery design can be broken through, so that the charging speed of the battery is greatly improved.
In the embodiment of the present application, the structure of the receiving coil of the wireless charging part needs to be changed, and in a low temperature state, the receiving coil needs to have a larger alternating current impedance (Rs) to achieve the effect of self-heating of the coil. The coil structure requires the following:
1) As shown in fig. 7, the coil needs to be closely attached to the battery, and the existing mobile phone is generally closely attached to the battery, so the scheme has low requirements on the structure of the mobile phone battery, and can achieve the beneficial effects of the embodiment of the application without changing the structure of the mobile phone;
2) The coil adopts a multi-channel mode, can be wound in parallel, and also can adopt a mode of middle tapping. The parallel wiring is divided into a multi-strand wiring mode and a Flexible Printed Circuit (FPC) type multi-path wiring mode; the center tap mode is a mode of pulling a wire through the middle of a coil. The low AC impedance coil is used for fast charging, and the high impedance coil is used in a battery heating scene. As shown in fig. 8, a parallel multi-strand routing manner is adopted; wherein the strand 1 is used for heating and the other strands are used for charging. One end of each strand 1 and one end of the other strands are connected with the receiving module, the other end of each strand 1 is connected with one end of the switch 1 (namely, the first switch), the other ends of the other strands are connected with one end of the switch 2 (namely, the second switch), the other ends of the switches 1 and 2 are connected with one end of the resonant capacitor, and the other end of the resonant capacitor is connected with the receiving module. The control end of the processor is connected with the switch 1 and the switch 2 and is used for controlling the conducting state of the switch 1 and the switch 2. The processor may communicate with the receiving module, for example, to indicate how much current the receiving module should currently charge the battery.
It can be understood that the single-strand ac impedance is relatively high, and the impedance can be as much as N times that of the N-strand, for example, in the case that the single-strand and the N-strand are both overcurrent 1A, the single-strand generates heat which is N times that of the N-strand. In the case of high-power charging, it is obvious that the single-stranded wire has too low efficiency, and the heat generation is very serious, and the charging efficiency is affected, but in the case of needing the single-stranded wire to heat the battery, the heating effect can be achieved by adopting the single-stranded wire.
As shown in fig. 9, a center tap mode is adopted, in which a center tap interface 1 of the tap coil is connected with one end of a switch 2, one end of the tap coil is connected with the receiving module, the other end of the tap coil is connected with one end of the switch 1, the other ends of the switch 1 and the switch 2 are both connected with one end of a resonant capacitor, the other end of the resonant capacitor is connected with the receiving module, and a control end of the processor is connected with the switch 1 and the switch 2 for controlling the conduction state of the switch 1 and the switch 2. The processor may communicate with the receiving module, for example, to indicate how much current the receiving module should currently charge the battery.
It can be understood that the center tap mode is also used for coil impedance distinction, the center tap interface 1 is used for access during high-power charging, the impedance is low, the heat generation is small, and under the condition that a battery needs to be heated, the coil is fully accessed, the impedance is high, and the heat generation is large.
3) When charging is started, (1) if the battery temperature is at a lower temperature, that is, below a normal quick-charging temperature interval (that is, greater than or equal to a first threshold and less than a second threshold), for the structure shown in fig. 8, the switch 1 and the switch 2 may be turned on first, so that the coil is in a high-impedance state, and the coil is heated even at low power by the charging current, thereby heating the battery, turning on the switch 2 and the switch 1 after the battery temperature rises to the normal quick-charging temperature interval, and starting a normal quick-charging mode; for the structure shown in fig. 9, the switch 2 may be turned off and the switch 1 may be turned on to make the coil in a high impedance state, and the charging current may also cause the coil to generate heat at a low power, so as to heat the battery, and then the switch 2 may be turned on and the switch 1 may be turned off after the temperature of the battery is raised to a normal fast charging temperature range.
4) When the battery is in the normal quick-charging temperature interval, the same manner as that mentioned in the item 3) can also be adopted to heat the battery, so that the temperature of the battery is raised to a higher temperature interval (namely, greater than or equal to a second threshold), then the battery is switched to a low-impedance mode, a larger charging rate is started, for example, the normal quick-charging of the battery cell is 1.5C at room temperature, and the 3C quick-charging mode is started after the battery is heated to 50 ℃; in this mode, the heating temperature cannot exceed the upper limit of the temperature that the battery can store, such as 60 ℃ (which is an example of the second threshold), and the heating temperature cannot exceed the temperature;
5) During heating, the current introduced into the battery is not suitable to be too large, and preferably does not exceed the current value which can be tolerated by a battery tab;
6) In order to prevent the internal structure of the battery from changing at high temperature, such as the rapid consumption of electrolyte, in some embodiments, heating is applied only when the rapid charging is started, and the rest time, such as discharging and normal rapid charging, cannot exceed the normal temperature;
7) As shown in fig. 10, it is a graph of 0.7C cell capacity 5100mAh charged at 0.7C rate at 25 ℃ and 1.5C rate after heated to 50 ℃, and it can be seen from the graph that the full charge time at room temperature is 155min, and the boost rate charging time after heating is shortened to 88min, so that the charging speed of the battery after heating can be greatly increased.
The embodiment of the application provides a mode of heating a battery through the impedance increase of a wireless charging receiving coil on the premise of not additionally changing the internal structure of the battery, and after the internal temperature of the battery is heated to a target charging temperature in advance, the corresponding charging current is reused for charging. On one hand, the charging speed of the battery at low temperature can be improved, and meanwhile, the rated charging rate of the battery design can be broken through, so that the charging speed of the battery is greatly improved.
Based on the foregoing embodiments, the present application provides a wireless charging device, which includes modules and units included in the modules, and can be implemented by a processor; of course, the implementation can also be realized through a specific logic circuit; in implementation, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), 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, and as shown in fig. 11, the device 110 includes a temperature obtaining module 111, a first charging module 112, and a second charging module 113, where:
a temperature obtaining module 111, configured to obtain a battery temperature of the electronic device;
a first charging module 112, configured to couple with a transmitting coil of a wireless charging device through a first receiving coil to charge a battery of the electronic device if the battery temperature is less than a first threshold; and
a second charging module 113, configured to couple the transmitting coil with a 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 an impedance of the first receive coil is greater than an impedance of the second receive coil.
In some embodiments, the second charging module 113 is configured to: under the condition that the temperature of a battery of the electronic equipment rises to be greater than or equal to the first threshold and smaller than a second threshold, continuing to charge the battery through the first receiving coil until the temperature of the battery of the electronic equipment rises to be greater than or equal to the second threshold, and disconnecting the coupling of the first receiving coil and the transmitting coil; wherein the second threshold is greater than the first threshold; and controlling the power supply power to the second receiving coil to be first power when the temperature of the battery of the electronic equipment rises to be greater than or equal to a second threshold; the first power is greater than a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and less than the second threshold; converting the induced current generated by the second receiving coil into a first charging current to charge the battery; and the first charging current is larger than the charging current corresponding to the specific power value.
In some embodiments, the apparatus 110 further comprises a control module to: when the temperature of a battery of the electronic equipment rises to be larger than or equal to a second threshold value, disconnecting the first receiving coil from the transmitting coil; wherein the second threshold value is less than or equal to an upper limit value of a safe temperature of the battery.
In some embodiments, when the battery is charged through the first receiving coil, the current passing through the battery is controlled to be less than or equal to the current which can be endured by the pole ear of the battery.
In some embodiments, the obtaining module 111 is configured to: receiving a starting instruction; the starting instruction is used for indicating starting a heating mode or a quick charging mode; and responding to the starting instruction, and acquiring the battery temperature of the electronic equipment.
In some embodiments, the second charging module 113 is configured to: coupling with the transmit coil through the second receive coil; and controlling the power supply power to the second receiving coil to be second power; the second power is equal to a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and smaller than the second threshold; converting the induced current generated by the second receiving coil into a second charging current to charge the battery; and 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: coupled to the transmit coil by the first receive coil and the second receive coil.
The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be noted that the division of the modules by the apparatus described in the embodiment of the present application is illustrative, and is only one division of logic functions, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, may exist alone physically, or may be integrated into one unit by two or more units. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit. Or may be implemented in a combination of software and hardware.
It should be noted that, in the embodiment of the present application, if the method described above is implemented in the form of a software functional module and sold or used as a standalone 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 or portions thereof that contribute to the related art may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes several instructions for causing an electronic device to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.
An electronic device is provided in an embodiment of the present application, fig. 12 is a schematic diagram of a hardware entity of the electronic device in the embodiment of the present application, as shown in fig. 12, the electronic device 120 includes a memory 121 and a processor 122, the memory 121 stores a computer program that can be executed on the processor 122, and the processor 122 implements the steps in the method provided in the embodiment when executing the program.
It should be noted that the Memory 121 is configured to store instructions and applications executable by the processor 122, and may also buffer data (e.g., image data, audio data, voice communication data, and video communication data) to be processed or already processed by the processor 122 and modules in the electronic device 120, and may be implemented by a FLASH Memory (FLASH) or a Random Access Memory (RAM).
Embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps in the methods provided in the above embodiments.
Embodiments of the present application provide a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the method provided by the above-described method embodiments.
Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium, the storage medium and the device of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" or "some embodiments" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all 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 the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the advantages and disadvantages of the embodiments. The foregoing description of the various embodiments is intended to highlight different aspects of the various embodiments that are the same or similar, which can be referenced with one another and therefore are not repeated herein for brevity.
The term "and/or" herein is merely an association relationship describing an associated object, and means that three relationships may exist, for example, object a and/or object B, may mean: the object A exists alone, the object A and the object B exist simultaneously, and the object B exists alone.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice, such as: multiple modules or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or modules may be electrical, mechanical or other.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules; can be located in one place or distributed on a plurality of network units; some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may be separately regarded as one unit, or two or more modules may be integrated into one unit; the integrated module can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer-readable storage medium, and when executed, executes the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application or portions thereof that contribute to the related art may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes several instructions for causing an electronic device to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to arrive at new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided herein may be combined in any combination to arrive at a new method or apparatus embodiment without conflict.
The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (15)

1. A wireless charging method, the method comprising:
acquiring the battery temperature of the electronic equipment;
under the condition that the temperature of the battery is lower than a first threshold value, coupling a first receiving coil with a transmitting coil of a wireless charging device so as to charge the battery of the electronic device; and
when the temperature of a battery of the electronic equipment rises to be greater than or equal to the first threshold value, coupling a second receiving coil with the transmitting coil so as to charge the battery; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
2. The method of claim 1,
when the temperature of the battery of the electronic equipment rises to be greater than or equal to the first threshold and less than a second threshold, the battery is charged through the coupling between the first receiving coil and the second receiving coil and the transmitting coil until the temperature of the battery of the electronic equipment rises to be greater than or equal to the second threshold, the coupling between the first receiving coil and the transmitting coil is disconnected, and the coupling between the second receiving coil and the transmitting coil is realized, so that the battery is charged; wherein the second threshold is greater than the first threshold.
3. The method of claim 2, wherein said coupling with said transmitting coil via a second receiving coil to charge said battery comprises:
controlling the power supply power to the second receiving coil to be first power when the temperature of the battery of the electronic equipment rises to be greater than or equal to a second threshold value; the first power is greater than a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and less than the second threshold;
converting the induced current generated by the second receiving coil into a first charging current to charge the battery; and the first charging current is larger than the charging current corresponding to the specific power value.
4. The method of claim 2, further comprising:
when the temperature of a battery of the electronic equipment rises to be larger than or equal to a second threshold value, disconnecting the first receiving coil from the transmitting coil; wherein the second threshold value is less than or equal to an upper limit value of a safe temperature of the battery.
5. The method according to claim 1 or 2, characterized in that the current passed to the battery is controlled to be less than or equal to the current that can be tolerated by the tabs of the battery when the battery is charged by means of the first receiving coil.
6. The method of claim 1, wherein obtaining the battery temperature of the electronic device comprises:
receiving a starting instruction; wherein the opening instruction is used for indicating to open a heating mode or a quick charging mode;
and responding to the starting instruction, and acquiring the battery temperature of the electronic equipment.
7. The method of claim 1 or 6, wherein said coupling with said transmitting coil via a second receiving coil to charge said battery comprises:
coupling with the transmit coil through the second receive coil; and
controlling the power supply power to the second receiving coil to be second power; the second power is equal to a specific power value, and the specific power value is a power value corresponding to the condition that the battery temperature is greater than or equal to the first threshold and smaller than a second threshold;
converting the induced current generated by the second receiving coil into a second charging current to charge the battery; and the second charging current is equal to the charging current corresponding to the specific power value.
8. The method according to any one of claims 1 to 4, further comprising:
and when the battery temperature is lower than a first threshold value, the second receiving coil is coupled with the transmitting coil so as to charge the battery of the electronic equipment.
9. An electronic device, comprising: the device comprises a processor, a first receiving coil, a second receiving coil and a battery; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil;
the processor is configured to: acquiring the temperature of the battery; and in the case that the battery temperature is lower than a first threshold value, coupling the first receiving coil with a transmitting coil of a wireless charging device so as to charge the battery; and when the temperature of the battery rises to be greater than or equal to the first threshold value, the battery is charged through coupling of a second receiving coil and the transmitting coil.
10. The apparatus of claim 9, further comprising a receiving module, a resonant capacitor, a first switch, and a second switch; the first receiving coil and the second receiving coil are mutually parallel and independent cables;
first ends of the first receiving coil and the second receiving coil are connected with the receiving module, a second end of the first receiving coil is connected with a first end of the first switch, a second end of the first switch is connected with a first end of the resonant capacitor, and a second end of the resonant capacitor is connected with the receiving module;
and a second end of the second receiving coil is connected with a first end of the second switch, a second end of the second switch is connected with a first end of the resonant capacitor, and a second end of the resonant capacitor is connected with the receiving module.
11. The apparatus of claim 9, further comprising a receiving module, a resonant capacitor, a first switch, and a second switch; wherein, the first and the second end of the pipe are connected with each other,
the first receiving coil and the second receiving coil belong to the same tap coil, the tap coil comprises a first end, a second end and a middle tap, a coil between the first end and the second end is used as the first receiving coil, and a coil between the first end and the middle tap is used as the second receiving coil;
the first end of tap coil with receiving module connects, the second end of tap coil with the first end of first switch is connected, the second end of first switch with resonant capacitor's first end is connected, the center tap with the first end of second switch is connected, the second end of second switch with resonant capacitor's first end is connected, resonant capacitor's second end with receiving module connects.
12. The apparatus according to claim 10 or 11,
the processor is configured to turn on the first switch to couple the first receiving coil with the transmitting coil if the battery temperature is less than a first threshold; turning on the second switch to couple the second receiving coil with the transmitting coil when the battery temperature rises to be greater than or equal to the first threshold;
the first receiving coil and the second receiving coil are used for receiving the electromagnetic signal transmitted by the transmitting coil when being coupled with the transmitting coil, so that induced current is output to the resonant capacitor;
the resonance capacitor is used for converting the induced current into resonance current and outputting the resonance current to the receiving module;
and the receiving module is used for converting the input resonance current into direct current and then outputting the direct current to the battery.
13. A wireless charging apparatus, the apparatus comprising:
the temperature acquisition module is used for acquiring the battery temperature of the electronic equipment;
the first charging module is used for coupling with a transmitting coil of wireless charging equipment through a first receiving coil under the condition that the temperature of the battery is smaller than a first threshold value so as to charge the battery of the electronic equipment; and
the second charging module is used for coupling the second receiving coil with the transmitting coil to charge the battery under the condition that the temperature of the battery of the electronic equipment rises to be greater than or equal to the first threshold; wherein an impedance of the first receive coil is greater than an impedance of the second receive coil.
14. An electronic device comprising a memory and a processor, the memory storing a computer program operable on the processor, wherein the processor implements the method of any one of claims 1 to 8 when executing the program.
15. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
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CN112994173B (en) * 2021-04-02 2023-04-07 Oppo广东移动通信有限公司 Wireless charging method and device, equipment and storage medium
CN113644711B (en) * 2021-08-04 2024-03-08 深圳市倍力奇科技有限公司 Management system for wireless charging of interactive mobile phone

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US10840726B2 (en) * 2016-07-07 2020-11-17 Apple Inc. Electronic device with wireless charging and battery heating
CN110797985B (en) * 2018-08-02 2022-03-25 Oppo广东移动通信有限公司 Coil switching method and device, storage medium and electronic equipment
CN110086222A (en) * 2019-04-29 2019-08-02 努比亚技术有限公司 A kind of charging/discharging thereof, device and mobile terminal
CN110459837A (en) * 2019-08-09 2019-11-15 华为技术有限公司 Electronic equipment and battery heating means
CN112201864B (en) * 2020-09-27 2022-07-08 Oppo广东移动通信有限公司 Battery, electronic device and electronic device assembly
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