CN117277522A

CN117277522A - Wireless charging circuit, wireless charging method, wireless charging device, medium, chip and terminal

Info

Publication number: CN117277522A
Application number: CN202210665790.XA
Authority: CN
Inventors: 吴鹏飞
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2023-12-22

Abstract

The present disclosure relates to a wireless charging circuit, a wireless charging method, an apparatus, and a readable storage medium, the wireless charging circuit including: the coil assembly is formed by nesting at least two coils inside and outside, the first end of the rectifier bridge is connected with the coil assembly, and the storage battery is connected with the second end of the rectifier bridge. The present disclosure provides for a coil assembly comprising at least two coils nested inside and outside such that each coil in the coil assembly is capable of participating in a charging operation, wherein the charging operation comprises charging and discharging to the outside so as to form a plurality of coil combinations such that the combination results in a plurality of coil charging modes so as to better match the coils of the end device. The problem that charging cannot be performed or charging is stopped due to poor coil coupling caused by overlarge coil gap of two devices is avoided.

Description

Wireless charging circuit, wireless charging method, wireless charging device, medium, chip and terminal

Technical Field

The disclosure relates to the technical field of wireless charging, and in particular relates to a wireless charging circuit, a wireless charging method, a wireless charging device, a readable storage medium, a chip and a terminal.

Background

In the wireless charging technology, for coil induction type wireless charging, a primary coil in a transmitting end generates a certain current in a secondary coil in a receiving end by electromagnetic induction with an alternating current of a certain frequency, thereby transferring energy from the transmitting end to the receiving end.

In the related art, when two devices perform coil induction type wireless charging, the coil coupling of the two devices is poor due to the possible difference of the sizes of the coils, so that the problem that charging cannot be performed or the charging cannot be performed is caused.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a wireless charging circuit, a wireless charging method, a wireless charging device, a medium, a chip and a terminal.

According to a first aspect of embodiments of the present disclosure, there is provided a wireless charging circuit comprising:

the coil assembly is formed by nesting at least two coils inside and outside;

a rectifier bridge, a first end of which is connected with the coil assembly;

and the storage battery is connected with the second end of the rectifier bridge.

Optionally, the wireless charging circuit further comprises at least two switch assemblies;

the at least two coils are arranged at the first end of the rectifier bridge in parallel, and one switch assembly is arranged between each coil and the first end of the rectifier bridge.

Optionally, the wireless charging circuit further comprises at least two current adjustment devices;

the at least two coils are arranged at the first end of the rectifier bridge in parallel, and one current adjusting device is arranged between each coil and the first end of the rectifier bridge.

Optionally, the wireless charging circuit further comprises at least two PFC modules;

the at least two coils are arranged at the first end of the rectifier bridge in parallel, and one PFC module is arranged between each coil and the first end of the rectifier bridge.

Optionally, the rectifier bridge includes at least two rectifier circuits, rectifier circuits in the rectifier bridge and coil in the coil assembly are connected in one-to-one correspondence, at least two rectifier circuits in the rectifier bridge are connected in parallel and then are connected with the storage battery.

Optionally, the rectifier bridge includes a rectifier circuit, at least two coils in the coil assembly are connected in parallel at a first end of the rectifier circuit, and a second end of the rectifier circuit is connected with the storage battery.

According to a second aspect of embodiments of the present disclosure, there is provided a wireless charging method, including:

acquiring charging data of a local terminal device and charging data of an opposite terminal device, wherein the local terminal device comprises the wireless charging circuit in the first aspect;

Determining a target coil in at least two coils of the local terminal equipment according to the charging data of the local terminal equipment and the charging data of the opposite terminal equipment, wherein the target coil is matched with the coil of the opposite terminal equipment;

and controlling the target coil to perform charging work.

Optionally, the charging data includes a coil size, and determining a target coil of at least two coils of the local device according to the charging data of the local device and the charging data of the opposite device includes:

determining coil combination data of the local terminal equipment according to the charging data of the local terminal equipment, wherein the coil combination data comprises a plurality of combination modes of coils of the local terminal equipment and coil sizes corresponding to each combination mode;

and determining the coil contained in the combination mode with the smallest coil size difference value of the coil combination data and the opposite terminal equipment as a target coil in at least two coils of the local terminal equipment.

Optionally, the charging data further includes a charging power;

before controlling the target coil to perform charging operation, the method further includes:

determining target charging power of the target coil according to the charging power of the local terminal equipment and the charging power of the opposite terminal equipment;

Controlling the target coil to perform charging operation, including:

and controlling the charging power of the target coil to the target charging power.

Optionally, the determining the target charging power of the target coil according to the charging power of the local terminal device and the charging power of the opposite terminal device includes:

determining the minimum value of the charging power of the local terminal equipment and the charging power of the opposite terminal equipment as the total charging power of the target coil;

and distributing the target charging power to the target coil according to the total charging power, wherein the sum of the target charging powers distributed by the target coil is equal to the total charging power.

Optionally, the allocating the target charging power to the target coil according to the total charging power includes:

determining the number of coils contained in the target coil;

when the number of coils characterizes the target coils as a single coil, the total power charged is determined as a target power charged for a single one of the target coils.

Determining the number of coils contained in the target coil;

when the coil quantity characterizes that the target coil is at least two coils, acquiring attribute information of each coil in the target coil, wherein the attribute information comprises an inductance value and a resistance value;

and distributing the target charging power to each coil in the target coils according to the attribute information of each coil in the target coils, wherein the sum of the target charging power distributed by each coil in the target coils is equal to the total charging power.

Optionally, the acquiring the charging data of the peer device includes:

controlling the local terminal equipment to establish communication connection with the opposite terminal equipment;

and after the communication connection between the local terminal equipment and the opposite terminal equipment is established, receiving a communication data packet sent by the opposite terminal equipment, wherein the communication data packet comprises charging data of the opposite terminal equipment.

Optionally, the method for obtaining the coil size in the charging data of the opposite terminal device includes:

detecting the coil of the opposite terminal equipment to obtain a detection value;

and determining the coil size of the opposite terminal equipment according to the detection value.

Optionally, the method further comprises:

In the charging process, acquiring a charging state parameter, wherein the charging state parameter comprises temperature and/or electric quantity;

determining the adjusted charging power of the local terminal equipment according to the charging state parameters;

determining the size of an adjusting coil of the local terminal equipment according to the adjusting charging power of the local terminal equipment;

and determining an adjusting working coil of the local terminal equipment according to the size of the adjusting coil.

According to a third aspect of embodiments of the present disclosure, there is provided a wireless charging apparatus, comprising:

the first acquisition module is configured to acquire charging data of the local terminal equipment and charging data of the opposite terminal equipment;

a first determining module configured to determine a target coil of at least two coils of the local end device according to the charging data of the local end device and the charging data of the opposite end device, wherein the target coil is matched with the coils of the opposite end device;

and the control module is configured to control the target coil to perform charging operation.

According to a fourth aspect of embodiments of the present disclosure, there is provided a wireless charging apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

Acquiring charging data of the local terminal equipment and charging data of the opposite terminal equipment;

and controlling the target coil to perform charging work.

According to a fifth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the wireless charging method provided by the second aspect of the present disclosure.

According to a sixth aspect of embodiments of the present disclosure, there is provided a chip, including a processor and a rectifier bridge, a first interface of the rectifier bridge is used to connect with a coil assembly, a second interface of the rectifier bridge is used to connect with a battery, and the processor is used to execute the steps of the wireless charging method provided in the second aspect of the present disclosure, and the coil assembly is formed by nesting at least two coils inside and outside.

According to a seventh aspect of embodiments of the present disclosure, there is provided a terminal including the wireless charging circuit provided in the first aspect of the present disclosure and the wireless charging apparatus provided in the fourth aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: through setting up a coil pack, this coil pack includes two at least inside and outside nested coils, this coil pack is connected with the first end of rectifier bridge to be connected with the battery through the second end of rectifier bridge, thereby make each coil in the coil pack can participate in the work that charges, wherein, the work that charges includes charge and discharges outward, so that form multiple coil combination form, thereby the combination obtains multiple coil charging methods, so that the coil of matching terminal equipment better. The problem that charging cannot be performed or charging is stopped due to poor coil coupling caused by overlarge coil gap of two devices is avoided.

Moreover, compared with a single coil, for the same charging power, the working modes of the plurality of coils can reduce heat loss, so that the heating condition of the coils when the device is charged wirelessly is reduced, electric energy is saved, and the device use experience of a user is improved.

And when the charging work is carried out, the coil used in the local terminal equipment is determined according to the charging data of the opposite terminal equipment, so that the local terminal equipment can use the coil matched with the coil of the opposite terminal equipment to carry out the charging work, and the problem that the charging is impossible or broken due to poor coupling of the coil of the local terminal equipment and the coil of the opposite terminal equipment caused by overlarge gap between the coil of the local terminal equipment and the coil of the opposite terminal equipment during the charging work is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 1 is a schematic diagram of a wireless charging circuit, according to an example embodiment.

Fig. 2 is a schematic diagram of a wireless charging circuit shown according to another exemplary embodiment.

Fig. 3 is a schematic diagram of a wireless charging circuit according to yet another exemplary embodiment.

Fig. 4 is a flow chart illustrating a wireless charging method according to an exemplary embodiment.

Fig. 5 is a schematic diagram of a related art coil for charging a wearable device.

Fig. 6 is a schematic diagram of a coil for charging a wearable device, according to an example embodiment.

Fig. 7 is a flowchart illustrating a method of acquiring charging data of a peer device, according to an example embodiment.

Fig. 8 is a flowchart illustrating a method of obtaining a coil size of a peer device, according to an example embodiment.

Fig. 9 is a flowchart illustrating a method of determining a target coil according to an exemplary embodiment.

Fig. 10 is a flowchart illustrating a method of determining a target charging power according to an exemplary embodiment.

Fig. 11 is a flowchart illustrating a method of determining a target charging power according to an exemplary embodiment.

Fig. 12 is a schematic diagram of a multi-coil charge according to an exemplary embodiment.

Fig. 13 is a schematic diagram of a multi-coil charge according to another exemplary embodiment.

Fig. 14 is a block diagram illustrating a wireless charging apparatus according to an exemplary embodiment.

Fig. 15 is a block diagram illustrating a wireless charging apparatus according to an exemplary embodiment.

Reference numerals illustrate:

1-coil assembly, 11-first coil, 12-second coil, 2-rectifier bridge, 21-first rectifier circuit, 22-second rectifier circuit, 3-battery, 41-first switch assembly, 42-second switch assembly, 51-first current adjustment device, 52-second current adjustment device, 61-first PFC module, 62-second PFC module.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the related art, when two devices perform coil induction type wireless charging, the coil coupling of the two devices is poor due to the fact that the sizes of the coils may be different, so that the problem that charging cannot be performed or the charging cannot be performed is solved, and user experience is affected.

In view of the above problems, embodiments of the present disclosure provide a wireless charging circuit, a wireless charging method, a device, a medium, a chip, and a terminal, where a coil part is configured as a coil assembly formed by nesting at least two coils inside and outside, so that multiple coil combination forms can be formed, and multiple coil charging modes can be obtained by combining, so as to better match coils of a peer device. The problem that charging cannot be performed or charging is stopped due to poor coil coupling caused by overlarge coil gap of two devices is avoided.

Turning now to the description of a wireless charging circuit provided in accordance with an exemplary embodiment of the present disclosure, fig. 1 is a schematic diagram of a wireless charging circuit, as shown in fig. 1, including:

A coil assembly 1, the coil assembly 1 is formed by nesting at least two coils inside and outside.

The coil assembly 1 is disposed in a wireless charging device, which may be a mobile device, such as a mobile phone, a digital camera, a tablet computer, or a fixed device, such as a wireless charger. The coil assembly 1 comprises at least two coils which are nested inside and outside, and the at least two coils which are nested inside and outside can be combined at will, so that a plurality of charging working modes of coil combinations are provided, the coil combinations which are matched with the coils of the opposite terminal equipment can be selected, and the coupling effect of the coils is improved. The coil assembly 1 is formed by nesting at least two coils inside and outside, so that the problem of overlarge thickness caused by overlapping of a plurality of coils can be avoided.

When the charging work is carried out, if at least two coils are both charged, compared with a single coil, the heat loss can be reduced by the working mode of a plurality of coils. For example: taking two coils as an example, to achieve 50W of charging power, one coil is divided into 30W of power, and the other coil is divided into 20W of power, so that the heating value of the coils can be greatly reduced. The specific principle is as follows: the original 50W heat loss is i×i×r, the heat loss of the example scheme in this embodiment is I1×i1+i2×i2, and since R is approximately equal to r1+r2, the heat loss of the original 50W is i×i=i×i (r1+r2) =i×r1+i×r2, and since I > I1 and I > I2, the heat loss of the example scheme in this embodiment is significantly smaller than the original heat loss.

The winding direction of each coil may be clockwise or counterclockwise, and the current direction of each coil may be input from the inner side of the coil and output from the outer side of the coil, or the current direction of each coil may be input from the outer side of the coil and output from the inner side of the coil. A rectifier bridge 2, a first end of the rectifier bridge 2 being connected to the coil assembly 1.

A battery 3, the battery 3 being connected to the second end of the rectifier bridge 2.

The coil assembly 1 is connected with a first end of the rectifier bridge 2, and the storage battery 3 is connected with a second end of the rectifier bridge 2, in particular electrically connected, so that current generated in the coil can be transmitted to the rectifier bridge 2, and the generated alternating current is converted into direct current through the rectifier bridge 2 and transmitted to the storage battery 3, so that the storage battery 3 is charged; alternatively, the current of the battery 3 is transmitted to the rectifier bridge 2, and the coil is energized through the rectifier bridge 2, so that the coil emits an electromagnetic signal to the outside to charge other devices.

In one possible embodiment, the wireless charging circuit further comprises at least two switch assemblies;

at least two coils are arranged at the first end of the rectifier bridge 2 in parallel, and a switch component is arranged between each coil and the first end of the rectifier bridge 2.

Wherein the number of switch assemblies is equal to the number of coils, as shown in fig. 2, a first switch assembly 41 and a second switch assembly 42 may be included, i.e. one for each coil. At least two coils are arranged at the first end of the rectifier bridge 2 in parallel, and can play a role in parallel resistance reduction to a certain extent, so that heat loss is further reduced. A switch assembly is arranged between each coil and the first end of the rectifier bridge 2, namely, each coil is provided with a switch assembly, each switch assembly is connected with a controller, and the controller can control the switch assemblies to be opened and closed, so that the switch assemblies corresponding to each coil can independently control the on-off of the coil and the circuit of the rectifier bridge 2. Through all being provided with a switch module between every coil and the first end of rectifier bridge 2, can make every coil all can realize the break-make with the circuit of rectifier bridge 2 under switch module's effect to can realize the arbitrary combination of the coil that carries out the work of charging through the switch module that every coil corresponds, so that can select the coil combination that matches more with the coil size of opposite terminal equipment, improve the coupling effect of coil.

Fig. 2 is a schematic diagram of a wireless charging circuit according to another exemplary embodiment, fig. 2 is an example in which the coil assembly 1 includes two coils, and as shown in fig. 2, the coil assembly 1 in the wireless charging circuit may include a first coil 11 and a second coil 12, where the first coil 11 and the second coil 12 are disposed in parallel at a first end a of the rectifier bridge 2, a first switch assembly 41 is disposed between the first coil 11 and the first end of the rectifier bridge 2, and a second switch assembly 42 is disposed between the second coil 12 and the first end of the rectifier bridge 2.

In a possible embodiment, the wireless charging circuit further comprises at least two current adjusting devices, at least two coils are arranged in parallel at the first end of the rectifier bridge 2, and one current adjusting device is arranged between each coil and the first end of the rectifier bridge 2.

Wherein the number of the current adjusting devices is the same as the number of the coils, namely, each coil corresponds to one current adjusting device. Each current adjusting device is arranged between the corresponding coil and the first end of the rectifier bridge 2, and is connected with the controller, so that the current of the corresponding coil can be adjusted by each current adjusting device, and the effect of adjusting the power of each coil is achieved.

With continued reference to fig. 2, the wireless charging circuit may further include a first current adjustment device 51 and a second current adjustment device 52, where the first coil 11 and the second coil 12 are disposed in parallel at the first end a of the rectifier bridge 2, the first current adjustment device 51 is disposed between the first coil 11 and the first end a of the rectifier bridge 2, and the second current adjustment device 52 is disposed between the second coil 12 and the first end a of the rectifier bridge 2.

In a possible embodiment, the wireless charging circuit further includes at least two PFC modules, at least two coils are disposed in parallel at the first end a of the rectifier bridge 2, and one PFC module is disposed between each coil and the first end a of the rectifier bridge 2.

Wherein the number of PFC modules is the same as the number of coils, i.e. one PFC module for each coil, each PFC module being arranged between the corresponding coil and the first end a of the rectifier bridge 2. Because there is certain difference in the coupling condition between different coils and coils of opposite terminal equipment, there may be phase difference between voltage and current phases on different coils, at this time, PFC (Power Factor Correction ) module includes PFC circuit in PFC module, and by PFC circuit, the phase difference can be improved, so that the phase difference between multiple coils is as close to 0 as possible, and the voltage and current of different coils input rectifier bridge 2 can be regulated, thereby avoiding loss of exchange power.

With continued reference to fig. 2, the wireless charging circuit may further include a first PFC module 61 and a second PFC module 62, where the first coil 11 and the second coil 12 are disposed in parallel at a first end a of the rectifier bridge 2, the first PFC module 61 is disposed between the first coil 11 and the first end a of the rectifier bridge 2, and the second PFC module 62 is disposed between the second coil and the first end a of the rectifier bridge 2.

In one possible embodiment, the rectifier bridge 2 includes at least two rectifier circuits, the rectifier circuits in the rectifier bridge 2 are connected with the coils in the coil assembly 1 in a one-to-one correspondence, and the at least two rectifier circuits in the rectifier bridge 2 are connected with the storage battery 3 after being connected in parallel.

The number of rectifying circuits included in the rectifying bridge 2 is the same as the number of coils, that is, one rectifying circuit for each coil, so that one rectifying circuit exists for each coil to improve the phase difference thereof. The connection part of each rectifying circuit in the rectifying bridge 2 and the corresponding coil is a first end A of the rectifying bridge 2, at least two rectifying circuits in the rectifying bridge 2 are connected in parallel and then connected with the storage battery 3, and one end of the at least two rectifying circuits in the rectifying bridge 2, which is connected with the storage battery 3 in parallel, is a second end B of the rectifying bridge 2.

Fig. 3 is a schematic diagram of a wireless charging circuit according to another exemplary embodiment, fig. 3 is an example of a coil assembly 1 including two coils, as shown in fig. 2 and 3, a rectifier bridge 2 may include a first rectifier circuit 21 and a second rectifier circuit 22, the first rectifier circuit 21 in the rectifier bridge 2 is correspondingly connected with the first coil 11 in the coil assembly 1, the second rectifier circuit 22 in the rectifier bridge 2 is correspondingly connected with the second coil 12 in the coil assembly 1, and the first rectifier circuit 21 and the second rectifier circuit 22 in the rectifier bridge 2 are connected with a storage battery 3 after being connected in parallel.

In a possible embodiment, the rectifier bridge 2 comprises a rectifier circuit, at least two coils of the coil assembly 1 being connected in parallel at a first end a of the rectifier circuit, a second end of the rectifier circuit being connected to the battery 3.

The rectifying bridge 2 only comprises one rectifying circuit, the coil assembly 1 comprises at least two coils, the coils contained in the coil assembly 1 are connected in parallel and then connected to the first end of the rectifying circuit, so that the rectifying circuit can adjust the current input to the rectifying bridge 2 by each coil, the number of the rectifying circuits in the rectifying bridge 2 is reduced, and the size of a wireless charging chip comprising the rectifying bridge 2 can be reduced.

With continued reference to fig. 2, the rectifier bridge 2 may include a rectifier circuit, where the first coil 11 and the second coil 12 of the coil assembly 1 are connected in parallel at a first end a of the rectifier circuit, and a second end B of the rectifier circuit is connected to the battery 3.

Based on the wireless charging circuit in any of the above embodiments, the disclosed embodiments provide a wireless charging method, and fig. 4 is a flowchart of a wireless charging method according to an exemplary embodiment, and as shown in fig. 4, the method may be applied to a controller, and the method includes:

in step S401, charging data of the home terminal device and charging data of the opposite terminal device are acquired.

The local device comprises the wireless charging circuit in any embodiment, and may be a mobile device, for example, a mobile phone, a digital camera, a tablet computer, or a fixed device, for example, a wireless charger, or the like, where the local device may be used as a transmitting device to charge other devices, or may be used as a receiving device to charge the local device through other transmitting devices.

The method comprises the steps of obtaining charging data of local equipment and charging data of opposite terminal equipment, wherein the charging data can comprise coil sizes, coil information of the local equipment can be stored locally in advance, the stored coil information can comprise the size of coils, the number of the coils and the like, when the coil sizes of the local equipment are obtained, the coil information of the local equipment can be directly obtained locally, and then the coil sizes of the local equipment are obtained.

For obtaining the coil size of the opposite terminal equipment, the data sent by the opposite terminal equipment can be directly received, so that the coil size of the opposite terminal equipment can be obtained, and the coil of the opposite terminal equipment can be detected to obtain the coil size and the coil number of the opposite terminal equipment.

In step S402, a target coil of the at least two coils of the home terminal device is determined according to the charging data of the home terminal device and the charging data of the opposite terminal device, where the target coil matches with the coil of the opposite terminal device.

After the charging data of the local terminal equipment and the charging data of the opposite terminal equipment are obtained, a target coil in the local terminal equipment can be determined according to the charging data of the local terminal equipment and the charging data of the opposite terminal equipment, the target coil is matched with the coils of the opposite terminal equipment, and the number of the target coils can be one or a plurality of target coils. The target coil may be a combination of coils in the local device that most closely matches the coil size of the opposite device.

In step S403, the control target coil performs a charging operation.

After the target coil of the local terminal equipment is determined, the target coil in the local terminal equipment can be controlled to perform charging work. Specifically, the switch component corresponding to the target coil in the local terminal equipment can be controlled to be closed, so that the purpose of controlling the target coil in the local terminal equipment to charge is achieved. The charging work comprises charging and discharging, namely the local terminal equipment charges the opposite terminal equipment, or the local terminal equipment receives the charging of the opposite terminal equipment. That is, the home terminal device may serve as a transmitting terminal to charge other devices, or the home terminal device may serve as a receiving terminal to receive the charge of other devices. The charging role of the home terminal device may be determined according to the charging operation mode of the home terminal device, for example, the charging operation mode of the home terminal device may be charging or reverse charging, and when the charging operation mode of the home terminal device is charging, the charging role of the home terminal device is determined to be a receiving end, and the charging role of the opposite terminal device is determined to be a transmitting end; when the charging working mode of the local terminal equipment is reverse charging, determining the charging role of the local terminal equipment as a transmitting terminal, and determining the charging role of the opposite terminal equipment as a receiving terminal.

The wireless charging circuit included in the local terminal device in this embodiment includes, through setting up a coil assembly, this coil assembly includes two at least inside and outside nested coils, this coil assembly is connected with the first end of rectifier bridge, and be connected with the battery through the second end of rectifier bridge, thereby make each coil in the coil assembly can participate in the work of charging, wherein, the work of charging includes charging and discharging outward, when carrying out the work of charging, can confirm the coil that uses in the local terminal device according to the size of the coil of opposite terminal device, thereby can make the local terminal device use the coil that suits with the coil size of opposite terminal device carry out the work of charging, namely, make the local terminal device use the coil that is close with the coil size of opposite terminal device carry out the work of charging more, thereby avoid when carrying out the work of charging the coil of local terminal device and the condition that the coil of opposite terminal device is not good to charge or stop carrying out the work of charging.

Moreover, compared with a single coil, for the same charging power, when the working modes of a plurality of coils are used, the heat loss can be reduced, so that the heating condition of the coils when the device is charged wirelessly is reduced, the electric energy is saved, and the device use experience of a user is improved. Fig. 5 is a schematic diagram of a coil for charging a wearable device in the related art, as shown in fig. 5, a curve with an arrow in the diagram is a magnetic induction line, taking a local device as an example of a mobile phone, and in an original scheme of the related art, when the local device is a transmitting end, a large coil of the mobile phone is used as a transmitting coil during reverse charging, and wireless charging is performed on a wearable product, such as an earphone, namely, the large coil of the mobile phone in fig. 5 acts on a small coil of the earphone. The coil of the wearing product is very small, and the problem of poor coupling and continuous charging often occurs. Fig. 6 is a schematic diagram of a coil for charging a wearable device according to an exemplary embodiment, as shown in fig. 6, a curve with an arrow in the diagram is a magnetic induction line, and when a coil assembly of a local device includes a large coil and a small coil, the scheme of the embodiment only adopts the small coil inside to charge the small coil of the wearable device, and the large coil does not perform charging work, so that stable charging can be realized.

Fig. 7 is a flowchart illustrating a method for acquiring charging data of a peer device according to an exemplary embodiment, and as shown in fig. 7, based on the above wireless charging method, in a possible implementation manner, the method for acquiring charging data of a peer device may include the following steps:

in step S701, the control local device establishes a communication connection with the opposite device.

Before starting the charging operation, a communication connection between the home terminal device and the opposite terminal device needs to be established, in some embodiments, the home terminal device may send a connection request to the opposite terminal device corresponding to the target identity information, and after the opposite terminal device receives the connection request, the communication connection between the home terminal device and the opposite terminal device may be established in response to the connection request of the home terminal device.

In step S702, after the home terminal device establishes a communication connection with the peer terminal device, a communication data packet sent by the peer terminal device is received, where the communication data packet includes charging data of the peer terminal device.

After the communication connection between the local terminal equipment and the opposite terminal equipment is established, the opposite terminal equipment can send a communication data packet to the local terminal equipment, and the local terminal equipment can receive and analyze the communication data packet sent by the opposite terminal equipment to obtain charging data of the opposite terminal equipment in the communication data packet, wherein the charging data of the opposite terminal equipment can comprise coil size, coil number, charging power, product merchants, manufacturers and the like.

By the method, under the condition that both the local terminal equipment and the opposite terminal equipment can start up, the charging data of the opposite terminal equipment can be obtained by directly obtaining the communication data packet sent by the opposite terminal equipment, and the method is convenient and quick. If the receiving end equipment cannot start up due to too low electric quantity, the default coil can be used for charging operation, and after the receiving end can start up, charging data of the opposite end equipment are acquired.

Fig. 8 is a flowchart illustrating a method for obtaining a coil size of a peer device according to an exemplary embodiment, as shown in fig. 8, in a possible implementation, the method for obtaining a coil size in charging data of the peer device is as follows:

in step S801, a coil of the opposite device is detected to obtain a detection value.

In step S802, the coil size of the opposite device is determined according to the detection value.

In this embodiment, in order to obtain the coil size of the opposite terminal device, the coil of the opposite terminal device may be detected to obtain a detection value, and specifically, a default coil in the local terminal device may be used to perform foreign matter detection on the opposite terminal device to obtain a foreign matter detection value. The default coil may be any coil in the local terminal device, and determines the coil size of the opposite terminal device according to the obtained foreign matter detection value. Specifically, a correspondence between the foreign object detection value and the coil size may be preset, so that the corresponding coil size may be determined directly according to the correspondence according to the size of the foreign object detection value. The coil size may be quantified in terms of a diameter or radius, where the coil size may be the actual coil size, i.e., the value of the diameter or radius of the coil that the windings in the coil actually form. The default coil in the local terminal equipment is used for detecting foreign matters on the opposite terminal equipment, and the number of coils of the opposite terminal equipment can be determined.

In some embodiments, the method for detecting the coil of the opposite terminal device may further be: detecting the boundary magnetic field intensity of the coils of the opposite terminal equipment, obtaining a magnetic field intensity detection value, and determining the size and the number of the coils of the opposite terminal equipment according to the obtained magnetic field intensity detection value.

In some embodiments, if the local device cannot start up due to too low electric quantity, the default coil may be used to perform charging operation first, after the local device can start up, charging data of the local device and the opposite terminal device are obtained, a target coil in at least two coils of the local device is determined according to the coil size of the opposite terminal device, and finally the target coil is controlled to perform charging operation.

Fig. 9 is a flowchart illustrating a method of determining a target coil, as shown in fig. 9, according to an exemplary embodiment, in which the charging data may include a coil size, and determining a target coil of at least two coils of the home device according to the charging data of the home device and the charging data of the opposite device may include the steps of:

in step S901, according to the charging data of the local device, coil combination data of the local device is determined, where the coil combination data includes a plurality of combination modes of coils of the local device and a coil size corresponding to each combination mode.

The local terminal equipment comprises at least two coils which are embedded inside and outside, at least two coils can be combined at will to obtain a plurality of combination modes of the coils of the local terminal equipment, each combination mode corresponds to one coil in size to form coil combination data of the local terminal equipment, and the coil combination data can be stored locally in advance, so that the coil combination data of the local terminal equipment can be directly obtained locally.

In step S902, a coil included in a combination manner in which a coil size difference between the coil combination data and the counter device is the smallest is determined as a target coil of at least two coils of the local device.

In this embodiment, a combination mode with the smallest difference between the coil sizes of the coil combination data and the opposite terminal device is determined as a target combination mode, and the coils included in the target combination mode are determined as target coils in at least two coils of the local terminal device, so that the coil size of the target coils is closer to the coil size of the opposite terminal device. Specifically, the difference between the coil size corresponding to each combination mode and the coil size of the opposite terminal device may be calculated, so as to obtain a plurality of difference values, and a combination mode corresponding to the smallest difference value may be determined from the plurality of difference values, which is used as the target combination mode.

In some embodiments, the charging data further includes a charging power, and the target charging power of the target coil may be determined according to the charging power of the local device and the charging power of the opposite device before the target coil is controlled to perform the charging operation, so as to control the charging power of the target coil to the target charging power. The purpose of controlling the charging power of the target coil to the target charging power can be achieved by controlling the current adjusting device of the target coil.

Fig. 10 is a flowchart illustrating a method of determining a target charging power according to an exemplary embodiment, and in particular, as shown in fig. 10, a method of determining a target charging power of a target coil according to a charging power of a home terminal device and a charging power of a counterpart terminal device may include the steps of:

in step S1001, the minimum value of the charging power of the home terminal device and the charging power of the opposite terminal device is determined as the total charging power of the target coil.

In step S1002, a target charging power is allocated to the target coil according to the total charging power, and the sum of the target charging powers allocated to the target coil is equal to the total charging power.

In this embodiment, the minimum value of the charging power of the home terminal device and the charging power of the opposite terminal device is determined, the minimum value is determined as the total charging power of the target coil, and the target charging power is allocated to the target coil according to the total charging power.

Specifically, the number of coils included in the target coils may be determined first, and if the target coils are single coils, the single target coils are required to provide the total charging power at this time, and the total charging power may be directly determined as the target charging power of the single coils in the target coils.

If the target coil is at least two coils, the target charging power needs to be allocated to the at least two coils respectively, specifically, attribute information of each coil in the target coil can be obtained, wherein the attribute information can include an inductance value and a resistance value. Then, according to the attribute information of each of the target coils, a target charging power is allocated to each of the target coils, and the sum of the target charging powers allocated to each of the target coils is equal to the total charging power. That is, the weight of each of the target coils may be determined according to the attribute information of each of the target coils, wherein the inductance value and the resistance value are positively correlated with the weight of each of the coils, and the total power charged is allocated according to the weight of each of the coils.

Fig. 11 is a flowchart illustrating a method of determining a target charging power according to an exemplary embodiment, as shown in fig. 11, in an implementation, during charging, the following method may be further included:

In step 1101, during charging, a state of charge parameter is obtained, the state of charge parameter comprising a temperature and/or an amount of electricity.

In the whole charging process, the temperature of the device or the electric quantity of the battery can affect the charging efficiency, at this time, a charging state parameter can be obtained, and the charging state parameter can include the temperature of the local device or the opposite device, or the charging state parameter can include the electric quantity of the storage battery of the receiving end. The charge of the battery is a percentage, for example 90%, of the current charge of the battery to the full charge of the battery, or the state of charge parameter includes both the temperature of the local or the opposite device and the charge of the battery at the receiving end.

In step S1102, an adjusted charging power of the local device is determined according to the charging status parameter.

Wherein, a plurality of temperature intervals are provided, each temperature interval corresponds to a charging power, wherein, temperature and charging power negative correlation, can confirm first charging power according to the temperature in the charge state parameter. And a plurality of electric quantity intervals are also arranged, each electric quantity interval corresponds to one charging power, wherein the electric quantity is inversely related to the charging power, and the second charging power can be determined according to the electric quantity in the charging state parameters. Determining the first charging power as an adjusted charging power when the state of charge parameter includes temperature; determining the second charging power as an adjusted charging power when the state of charge parameter includes temperature; when the state of charge parameter includes temperature and charge, a minimum value of the first charge power and the second charge power is determined as the adjusted charge power. So as to reduce the charging power as the device temperature increases and the battery level increases.

In step S1103, the adjusted coil size of the home terminal device is determined according to the adjusted charging power of the home terminal device.

The device is provided with a plurality of adjustment charging powers, each adjustment charging power corresponds to one adjustment coil, and the adjustment coil size of the local terminal device can be determined directly according to the corresponding relation between the adjustment charging power and the adjustment coil size.

In step S1104, an adjustment work coil of the local device is determined according to the adjustment coil size.

According to the size of the adjusting coil, a combination mode with the smallest difference value with the size of the adjusting coil can be determined from a plurality of combination modes of the coils of the local terminal equipment, and the coils contained in the combination mode are determined as the adjusting working coils of the local terminal equipment.

In some embodiments, it may also be determined whether the opposite terminal device is a multi-coil device, that is, the coils of the opposite terminal device are at least two coils, and when the coils of the opposite terminal device are at least two coils, the adjustment coil size information of the local terminal device may be sent to the opposite terminal device according to the adjustment coil size of the local terminal device, where the adjustment coil size information is used for the opposite terminal device to adjust its working coil according to the adjustment coil size in the adjustment coil size information.

Fig. 12 is a schematic diagram of a multi-coil charging multi-coil according to an exemplary embodiment, and fig. 13 is a schematic diagram of a multi-coil charging multi-coil according to another exemplary embodiment, wherein the coils of the transmitting end and the receiving end are wireless charging in a multi-coil form, and initially, the transmitting end and the receiving end are charged with large coils, as shown in fig. 12 and 13. During the charging process, as the temperature of the device increases or the electric quantity of the battery increases, the charging power gradually decreases, and when the power decreases to the next power level, the coil can be selectively used for charging the coil, as shown in fig. 12; when the power is reduced to yet another power level, the small coil may optionally be charged with a small coil, as shown in fig. 13.

Fig. 14 is a block diagram illustrating a wireless charging apparatus according to an exemplary embodiment. Referring to fig. 14, the wireless charging apparatus 1400 may include: a first acquisition module 1401, a first determination module 1402, and a control module 1403. Wherein:

the first obtaining module 1401 is configured to obtain charging data of a local device and charging data of an opposite device, where the local device includes the wireless charging circuit described in any of the foregoing embodiments;

the first determining module 1402 is configured to determine a target coil of at least two coils of the home terminal device according to the charging data of the home terminal device and the charging data of the opposite terminal device, where the target coil is matched with the coil of the opposite terminal device;

The control module 1403 is configured to control the target coil to perform a charging operation.

Optionally, the charging data includes a coil size, and the first determining module includes:

the acquisition sub-module is configured to determine coil combination data of the local terminal equipment according to the charging data of the local terminal equipment, wherein the coil combination data comprises a plurality of combination modes of coils of the local terminal equipment and coil sizes corresponding to each combination mode;

and the first determining submodule is configured to determine a coil contained in a combination mode with the smallest coil size difference value of the opposite end device in the coil combination data as a target coil in at least two coils of the local end device.

Optionally, the charging data further includes a charging power; the apparatus further comprises:

a second determining module configured to determine a target charging power of the target coil according to the charging power of the home terminal device and the charging power of the opposite terminal device;

the control module comprises:

and the control submodule is configured to control the charging power of the target coil to the target charging power.

Optionally, the first determining sub-module includes:

A determining unit configured to determine a minimum value of the charging power of the home terminal device and the charging power of the opposite terminal device as a total power of charging of the target coil;

and the distribution unit is configured to distribute the target charging power to the target coil according to the total charging power, and the sum of the target charging powers distributed by the target coil is equal to the total charging power.

Optionally, the dispensing unit comprises:

a first determination subunit configured to determine the number of coils contained in the target coil;

a second determination subunit configured to determine the total charging power as a target charging power of a single one of the target coils when the number of coils characterizes the target coil as a single coil.

Optionally, the dispensing unit comprises:

a third determination subunit configured to determine the number of coils contained in the target coil;

an acquisition subunit configured to acquire attribute information of each coil in the target coil when the number of coils characterizes the target coil as at least two coils, the attribute information including an inductance value and a resistance value;

And the distribution subunit is configured to distribute the target charging power to each coil in the target coils according to the attribute information of each coil in the target coils, and the sum of the target charging powers distributed by each coil in the target coils is equal to the total charging power.

Optionally, the first acquisition module includes:

a communication establishing sub-module configured to control the local end device to establish communication connection with the opposite end device;

and the receiving sub-module is configured to receive a communication data packet sent by the opposite terminal equipment after the communication connection between the local terminal equipment and the opposite terminal equipment is established, wherein the communication data packet comprises charging data of the opposite terminal equipment.

Optionally, the first acquisition module includes:

the detection sub-module is configured to detect the coil of the opposite terminal equipment to obtain a detection value;

and a second determining submodule configured to determine a coil size of the opposite end device according to the detection value.

Optionally, the apparatus further comprises:

the second acquisition module is configured to acquire a charging state parameter in a charging process, wherein the charging state parameter comprises temperature and/or electric quantity;

A third determining module configured to determine an adjusted charging power of the local device according to the charging state parameter;

a fourth determining module configured to determine an adjusted coil size of the home terminal device according to the adjusted charging power of the home terminal device;

and the sending module is configured to determine an adjusting working coil of the local terminal equipment according to the adjusting coil size.

Fig. 15 is a block diagram illustrating a wireless charging apparatus according to an exemplary embodiment. For example, the wireless charging apparatus 1500 may be a mobile phone, a tablet device, a wearable device, or the like having a wireless charging function.

Referring to fig. 15, apparatus 1500 may include one or more of the following components: a processing component 1502, a memory 1504, a power component 1506, a multimedia component 1508, an audio component 1510, an input/output interface 1512, a sensor component 1514, and a communication component 1516.

The processing component 1502 generally controls overall operation of the apparatus 1500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1502 may include one or more processors 1520 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 1502 may include one or more modules that facilitate interactions between the processing component 1502 and other components. For example, the processing component 1502 may include a multimedia module to facilitate interaction between the multimedia component 1508 and the processing component 1502.

The memory 1504 is configured to store various types of data to support operations at the apparatus 1500. Examples of such data include instructions for any application or method operating on the apparatus 1500, contact data, phonebook data, messages, pictures, videos, and the like. The memory 1504 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply assembly 1506 provides power to the various components of the apparatus 1500. The power supply component 1506 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 1500.

The multimedia component 1508 comprises a screen between the device 1500 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, multimedia assembly 1508 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 1500 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 1510 is configured to output and/or input audio signals. For example, the audio component 1510 includes a Microphone (MIC) configured to receive external audio signals when the device 1500 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 1504 or transmitted via the communication component 1516. In some embodiments, the audio component 1510 further comprises a speaker for outputting audio signals.

The input/output interface 1512 provides an interface between the processing component 1502 and peripheral interface modules, which can be keyboards, click wheels, buttons, and the like. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 1514 includes one or more sensors for providing status assessment of various aspects of the apparatus 1500. For example, the sensor assembly 1514 may detect an on/off state of the device 1500, a relative positioning of the components, such as a display and keypad of the device 1500, the sensor assembly 1514 may also detect a change in position of the device 1500 or one component of the device 1500, the presence or absence of user contact with the device 1500, an orientation or acceleration/deceleration of the device 1500, and a change in temperature of the device 1500. The sensor assembly 1514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 1514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1514 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1516 is configured to facilitate communication between the apparatus 1500 and other devices in a wired or wireless manner. The apparatus 1500 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 1516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 1516 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 1500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer-readable storage medium is also provided, such as memory 1504, including instructions executable by processor 1520 of apparatus 1500 to perform the above-described methods. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described wireless charging method when executed by the programmable apparatus.

In another exemplary embodiment, a chip is provided, including a processor and a rectifier bridge, where a first interface of the rectifier bridge is used to connect with a coil assembly, and a second interface of the rectifier bridge is used to connect with a battery, and the processor is used to execute the steps of the wireless charging method provided in the above embodiments of the disclosure, and the coil assembly is formed by nesting at least two coils inside and outside.

In another exemplary embodiment, a terminal is further provided, including the wireless charging circuit provided by the foregoing embodiment of the disclosure and the wireless charging device provided by the foregoing embodiment of the disclosure, where the terminal may be, for example, a mobile phone, a digital camera, a tablet computer, an electronic watch, and the like, including the wireless charging circuit provided by the foregoing embodiment of the disclosure and the wireless charging device provided by the foregoing embodiment of the disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging circuit, comprising:

the coil assembly is formed by nesting at least two coils inside and outside;

a rectifier bridge, a first end of which is connected with the coil assembly;

2. The wireless charging circuit of claim 1, further comprising at least two switch assemblies;

3. The wireless charging circuit of claim 1, further comprising at least two current adjustment devices;

4. The wireless charging circuit of claim 1, further comprising at least two PFC modules;

5. The wireless charging circuit of claim 1, wherein the rectifier bridge comprises at least two rectifier circuits, the rectifier circuits in the rectifier bridge are connected in one-to-one correspondence with the coils in the coil assembly, and the at least two rectifier circuits in the rectifier bridge are connected in parallel and then connected with the storage battery.

6. The wireless charging circuit of claim 1, wherein the wireless charging circuit comprises a plurality of wireless charging circuits,

the rectifier bridge comprises a rectifier circuit, at least two coils in the coil assembly are connected in parallel to a first end of the rectifier circuit, and a second end of the rectifier circuit is connected with the storage battery.

7. A wireless charging method, comprising:

acquiring charging data of a local terminal device and charging data of an opposite terminal device, wherein the local terminal device comprises the wireless charging circuit as claimed in any one of claims 1 to 6;

Determining a target coil in at least two coils of the local terminal equipment according to the charging data of the local terminal equipment and the charging data of the opposite terminal equipment, wherein the target coil is matched with the coil of the opposite terminal equipment; and controlling the target coil to perform charging work.

8. The wireless charging method of claim 7, wherein the charging data comprises a coil size;

the determining a target coil of at least two coils of the local terminal device according to the charging data of the local terminal device and the charging data of the opposite terminal device includes:

9. The wireless charging method of claim 7, wherein the charging data further comprises a charging power;

controlling the target coil to perform charging operation, including:

10. The wireless charging method of claim 9, wherein the wireless charging device comprises,

the determining the target charging power of the target coil according to the charging power of the local terminal device and the charging power of the opposite terminal device includes:

11. The wireless charging method of claim 10, wherein,

the allocating the target charging power to the target coil according to the charging total power comprises the following steps:

determining the number of coils contained in the target coil;

12. The wireless charging method of claim 10, wherein,

determining the number of coils contained in the target coil;

13. The wireless charging method of claim 7, wherein,

the obtaining the charging data of the opposite terminal equipment includes:

14. The wireless charging method of claim 8, wherein,

The method for obtaining the coil size in the charging data of the opposite terminal equipment comprises the following steps:

15. The wireless charging method of claim 7, wherein the method further comprises:

16. A wireless charging device, comprising:

17. A wireless charging device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

and controlling the target coil to perform charging work.

18. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of any of claims 7-15.

19. A chip comprising a processor and a rectifier bridge, a first interface of the rectifier bridge being configured to connect to a coil assembly, a second interface of the rectifier bridge being configured to connect to a battery, the processor being configured to perform the method of any one of claims 7-15, the coil assembly being formed by nesting at least two coils inside and outside.

20. A terminal comprising the wireless charging circuit of any one of claims 1-6 and the wireless charging device of claim 17.