CN115411844A

CN115411844A - Wireless charging system, method and device

Info

Publication number: CN115411844A
Application number: CN202110587412.XA
Authority: CN
Inventors: 于文超; 高海振; 赵瑞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-11-29
Also published as: WO2022247859A1

Abstract

The embodiment of the application relates to a wireless charging system, method and device, which are used for improving charging power. The system comprises a first electronic device and a second electronic device; the first electronic equipment at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic equipment through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic equipment through the second wireless charging circuit; the first wireless charging coil is configured to receive a wireless charging signal of the second electronic device and charge a battery of the first electronic device through the first wireless charging circuit; the second wireless charging coil is configured to receive a wireless charging signal of the second electronic device and charge the battery of the first electronic device through the second wireless charging circuit.

Description

Wireless charging system, method and device

Technical Field

The present application relates to the field of terminal technologies, and in particular, to a wireless charging system, method, and apparatus.

Background

Compared with wired charging, wireless charging has the advantages of convenience in carrying, simplicity in operation and the like. In recent years, the wireless charging technology is applied to electronic devices such as mobile phones and tablet computers more and more widely. Taking a mobile phone as an example, in an existing wireless charging scheme, a coil (or referred to as a wireless charging coil) is respectively disposed on the mobile phone (i.e., a charging device) and a wireless charger (i.e., a power supply device), and when the mobile phone and the wireless charger approach each other, the two coils approach each other to generate electromagnetic induction, and energy is transmitted to the mobile phone by the wireless charger. The thicker the coil thickness of the mobile phone is, the higher the wireless charging power of the mobile phone is, and the higher the charging efficiency is (namely, the faster the charging speed is). However, the current market tends to reduce the thickness of the whole mobile phone as much as possible, and is limited by the limitation of the thickness of the whole mobile phone, and the wireless charging efficiency is difficult to improve.

Therefore, how to consider both the thickness of the terminal device and the wireless charging efficiency is a technical problem that needs to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a wireless charging system, a wireless charging method and a wireless charging device, which can improve the wireless charging efficiency of electronic equipment on the basis of not increasing the thickness of the electronic equipment.

In a first aspect, a wireless charging system is provided, comprising a first electronic device and a second electronic device; the first electronic equipment at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic equipment through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic equipment through the second wireless charging circuit; the first wireless charging coil is configured to receive a wireless charging signal of the second electronic device and charge a battery of the first electronic device through the first wireless charging circuit; the second wireless charging coil is configured to receive a wireless charging signal of the second electronic device, and charge the battery of the first electronic device through the second wireless charging circuit.

According to the wireless charging system provided by the embodiment of the application, two charging coils are arranged in first electronic equipment (namely charging equipment), and an independent wireless charging circuit is arranged for each charging coil, so that two paths of wireless charging are realized, and the battery of the first electronic equipment is charged; simultaneously because two coils in first electronic equipment set up independent charging circuit respectively, so can also reduce and even avoid among the prior art through promoting the power of single charging path and lead to charging path power supersaturation and then lead to the risk that equipment hardware damaged, can prolong first electronic equipment's life.

In this embodiment of the present application, the positional relationship between two coils (i.e., the first wireless charging coil and the second wireless charging coil) in the first electronic device may be a flat-laid relationship, a stacked relationship, or the like, which is not limited in this application.

The specific implementation of stacking two coils is described below:

in one possible design, the first wireless charging coil and the second wireless charging coil are stacked in a first direction, wherein the first direction is parallel to an axial direction of the first wireless charging coil and/or the first direction is parallel to an axial direction of the second wireless charging coil; the second electronic device includes a third wireless charging coil. Accordingly, the first wireless charging coil is configured to couple with the third wireless charging coil, receiving a wireless charging signal of the second electronic device; the second wireless charging coil is configured to couple with a third wireless charging coil, receiving a wireless charging signal of a second electronic device.

Thus, the wireless charging power is improved by arranging two superposed coils on the first electronic device. In terms of manufacturing process, the existing single coils can be stacked after being thinned, and therefore the thickness of the first electronic device is not increased. Meanwhile, only one coil needs to be arranged on the second electronic device, so that the hardware cost can be saved.

In one possible design, the first wireless charging coil is disposed coaxially with the second wireless charging coil.

In one possible design, the bottom surface of the first wireless charging coil is disposed opposite to the top surface of the second wireless charging coil, and the distance from the top surface of the first wireless charging coil to the bottom surface of the second wireless charging coil is less than or equal to 0.25mm.

Therefore, the overall thickness of the two coils is not more than 0.25mm, and the coil can be suitable for industrial design of most machine types.

The specific implementation of two coils lying flat is described below:

in one possible design, the first wireless charging coil and the second wireless charging coil are spaced apart and arranged on a first plane, the first plane is perpendicular to an axial direction of the first wireless charging coil and/or the first plane is perpendicular to an axial direction of the second wireless charging coil, and a projection of the first wireless charging coil on the first plane does not intersect a projection of the second wireless charging coil on the first plane; the second electronic device comprises a third wireless charging coil and a fourth wireless charging coil, the third wireless charging coil and the fourth wireless charging coil are arranged on a second plane at intervals, the second plane is perpendicular to the axial direction of the third wireless charging coil and/or the second plane is perpendicular to the axial direction of the fourth wireless charging coil, and the projection of the third wireless charging coil on the second plane does not intersect with the projection of the fourth wireless charging coil on the second plane. Correspondingly, the first wireless charging coil is coupled with the third wireless charging coil and receives a wireless charging signal of the second electronic device; the second wireless charging coil is coupled with the fourth wireless charging coil and receives a wireless charging signal of the second electronic device.

Therefore, the wireless charging power is improved by arranging two flatly-placed coils on the first electronic equipment, and the thickness of the first electronic equipment can be ensured not to be increased.

In one possible design, the thickness of the first wireless charging coil is less than or equal to 0.25mm and the thickness of the second wireless charging coil is less than or equal to 0.25mm.

Therefore, the thickness of each coil does not exceed 0.25mm, and the coil can be suitable for industrial design of most machine types. In addition, the existing coil can be reused, and the process difficulty is reduced.

In the embodiment of the present application, the number of the coils in the first electronic device is not limited to two, and may be more.

In one possible design, the first electronic device further includes a fifth wireless charging coil; the second wireless charging coil and the fifth wireless charging coil are arranged in a stacked mode along a second direction, and the second direction is parallel to the axial direction of the second wireless charging coil and/or the second direction is parallel to the axial direction of the fifth wireless charging coil; the fifth wireless charging coil is coupled with the fourth wireless charging coil, receives a wireless charging signal of the second electronic device, and charges the battery of the first electronic device.

Therefore, the wireless charging power of the first electronic device can be further improved.

In this embodiment, the first electronic device may further adjust the wireless charging power.

In one possible design, the first wireless charging circuit is further configured to send a first control signal to the second electronic device; in response to the first control signal, the second electronic device adjusts the wireless charging power.

Therefore, the first electronic device can control the power output of the second electronic device through the first wireless charging circuit, and further indirectly adjust the charging power of two wireless charging paths of the first electronic device.

In one possible design, the first electronic device further includes a processor; the first wireless charging circuit is also used for sending first monitoring information to the processor; the second wireless charging circuit is also used for sending second monitoring information to the processor; the processor is used for indicating the first wireless charging circuit to send a first control signal to the second electronic device according to the first monitoring information and the second monitoring information.

Therefore, the first electronic device can adjust the charging power of each wireless charging channel more accurately.

In this embodiment of the application, the first electronic device may also switch between a single-path charging mode and a two-path charging mode.

In one possible design, the second electronic device further includes a switch; the first wireless charging circuit is also used for sending a second control signal to the second electronic equipment; in response to the second control signal, the second electronic device performs at least: the third wireless charging coil and a wireless charging circuit of the second electronic equipment are controlled to be connected or disconnected through a switch; or the fourth wireless charging coil and the wireless charging circuit of the second electronic device are controlled to be connected or disconnected through the switch.

Therefore, the switching between the single-path charging mode and the double-path charging mode can be realized, and the flexibility of the charging scheme is improved.

Of course, if more wireless charging coils are further disposed in the first electronic device and the second electronic device, the first electronic device may also control to switch other charging modes.

In a second aspect, a charging method is provided, which is applied to a wireless charging system, where the wireless charging system includes a first electronic device and a second electronic device; the first electronic equipment at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic equipment through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic equipment through the second wireless charging circuit. The method comprises the following steps: the second electronic equipment sends a wireless charging signal; the first wireless charging coil receives a wireless charging signal from the second electronic device and charges a battery of the first electronic device through the first wireless charging circuit; the second wireless charging coil receives a wireless charging signal from the second electronic device, and charges the battery of the first electronic device through the second wireless charging circuit.

For a specific implementation of the method, reference may be made to the description of functions of the first electronic device and the second electronic device in the first aspect or any one of possible designs of the first aspect, which is not described herein again.

In a third aspect, a charging apparatus is provided, the apparatus being located at a first electronic device; the charging device at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic device through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic device through the second wireless charging circuit; the first wireless charging coil is configured to receive a wireless charging signal of the second electronic device and charge a battery of the first electronic device through the first wireless charging circuit; the second wireless charging coil is configured to receive a wireless charging signal of the second electronic device and charge the battery of the first electronic device through the second wireless charging circuit.

For a specific implementation manner of the charging apparatus, reference may be made to the description of the first electronic device in the first aspect or any one of the possible designs of the first aspect, and details are not repeated here.

In a fourth aspect, a charging method is provided, which is applied to a first electronic device; the first electronic equipment at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic equipment through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic equipment through the second wireless charging circuit; the method comprises the following steps: the first wireless charging coil receives a wireless charging signal from the second electronic device and charges a battery of the first electronic device through the first wireless charging circuit; the second wireless charging coil receives a wireless charging signal from the second electronic device, and charges the battery of the first electronic device through the second wireless charging circuit.

For a specific implementation manner of the method, reference may be made to the first aspect or a functional description of the first electronic device in any one of possible designs of the first aspect, which is not described herein again.

Drawings

Fig. 1 is a schematic diagram of a wireless charging scenario applicable to the embodiment of the present application;

fig. 2 is a schematic structural diagram of a wireless charging system;

fig. 3 is a schematic structural diagram of a coil of a charging device;

fig. 4 is a schematic structural diagram of a wireless charging system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of another wireless charging system according to an embodiment of the present disclosure;

fig. 11 is a flowchart of a wireless charging method according to an embodiment of the present disclosure.

Detailed Description

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

Referring to fig. 1, which is a schematic view of a wireless charging scenario applicable to the embodiment of the present application, after a charging device (e.g., a mobile phone, a tablet, an intelligent wearable device, etc.) is close to a power supply device (e.g., a wireless charger, a wireless power bank, etc.), a coil in the charging device and a coil of the power supply device generate electromagnetic induction, and energy (or electric energy, or a wireless charging signal) is transmitted to the charging device by the power supply device.

Fig. 2 is a schematic structural diagram of a wireless charging system. And single coils are respectively arranged in the power supply equipment and the charging equipment, and wireless charging is realized through single-coil coupling. The charging system in the charging equipment comprises a wireless charging part and a wired charging part. When wireless charging is adopted, energy received by a coil on the charging equipment is sequentially transmitted to a battery of the charging equipment through a charging path formed by devices such as a Power Receiver (RX), a high-voltage switched capacitor converter (HVSC), a switched capacitor converter (SC) and the like. When the wired charging is adopted, energy received by the charging equipment from a power supply is transmitted to a battery of the charging equipment through a charging path formed by devices such as an overvoltage Protection (OVP) circuit and an SC in sequence. It should be understood that the power supply device in fig. 2 is a wireless charger as an example, so that the power supply device needs to be connected to a power supply when charging the charging device, and if the wireless charging device is a wireless charger, the power supply device may not be connected to the power supply when charging the charging device.

At present, the improvement of wireless charging power has become the key competitiveness of electronic products such as mobile phones, tablets, intelligent wearable devices and the like. If the wireless charging power of the charging device is to be continuously boosted, the voltage and/or current on the coil of the charging device needs to be boosted. To increase the voltage and/or current across the coil, the thickness of the coil needs to be increased.

However, due to the limitation of the thickness of the whole machine such as a mobile phone, a tablet, intelligent wearable equipment and the like, the thickness of the coil cannot be increased infinitely. For example, according to the thickness specification of a mobile phone currently on the market, the thickness of a coil of the mobile phone is at most about 0.25mm, as shown in fig. 3, the coil is a schematic structural diagram of a coil of a charging device, and includes A, B, each coil has a thickness of about 0.125mm, a and B coils are stacked and connected through a plurality of through holes, so that two parts of A, B coils are equivalent to a thickened coil, and the overall thickness is about 0.25mm. The saturation current of the coil with the thickness of 0.25mm is 5A (alternating current) at most, and the charging power is 50W at most. If the charging power is continuously increased, the thickness of the coil needs to be increased, which may increase the thickness of the whole machine and affect the Industrial Design (ID) of the whole machine. In addition, if the charging power is continuously boosted, the RX power may be too high to be damaged. For example, with a coil thickness of 0.25mm, the saturation voltage of RX is 20V and the saturation current is 2.5A, and if the charging power is continuously increased without increasing the specification of RX, RX may be damaged, which affects the product life.

Therefore, the scheme of continuously increasing the charging power by increasing the thickness of the coil has a larger bottleneck in the aspects of the overall thickness, the heat, the chip power and the like of the electronic equipment no matter the voltage or the current is increased.

In order to solve one or more technical problems described above, embodiments of the present application provide a wireless charging scheme. The double coils or the multiple coils are arranged in the charging equipment, the double coils or the multiple coils or the single coil is arranged in the power supply equipment, and each coil in the charging equipment is provided with the independent RX, so that the double coils or the multiple coils can be wirelessly charged in parallel on the premise of not increasing the thickness of the whole charging equipment and the power of a chip, and further the wireless charging power is improved.

In order to make the objects, technical solutions and advantages of the present application clearer, the following will describe the technical solutions of the embodiments of the present application in further detail with reference to the accompanying drawings. It is to be understood that the drawings herein are merely illustrative of the relative positions or connections of various elements and that certain elements are shown exaggerated in the drawing figures for ease of understanding and that the shapes and sizes of various elements in the drawings are not to reflect true proportions.

Example 1

The present embodiment describes a scheme in which the charging device is provided with two or more coils, and the power supply device is provided with two or more coils.

Referring to fig. 4, a schematic structural diagram of a wireless charging system provided in an embodiment of the present application includes: a charging device 01 and a power supply device 02. Here, the charging device 01 may also be referred to as a first electronic device, and the power supply device 02 may also be referred to as a second electronic device.

The charging device 01 includes two charging paths, wherein a first charging path (alternatively referred to as a first wireless charging path) includes the coil 101A, RX a, and a second charging path (alternatively referred to as a second wireless charging path) includes the coil 101B, RX B, and the two charging paths are connected in parallel with the battery 104 in the charging device 01 (it should be understood that "connected" or "connection" herein refers to electrical connection). In the first charging path, a first terminal of the RX102A is connected to the coil 101A, a second terminal of the RX102A is connected to the battery 104, the coil 101A is configured to receive electric energy (or a wireless charging signal) to generate Alternating Current (AC) power, and the RX102A is configured to convert the AC power generated by the coil 101A into Direct Current (DC) power and transmit the DC power to the battery 104. In the second charging path, a first terminal of the RX102B is connected to the coil 101B, a second terminal of the RX102B is connected to the battery 104, the coil 101B is used for receiving electric energy (or wireless charging signal) to generate ac power, and the RX102B is used for converting the ac power generated by the coil 101B into dc power and transmitting the dc power to the battery 104. The charging device 01 further includes a controller 103, which is connected to the two charging paths, and is configured to monitor and control the operating states of the charging paths.

Wherein, the coil 101A in the first charging path can also be referred to as a first wireless charging coil, and the circuit between the coil 101A and the battery 104 can be referred to as a first wireless charging circuit; the coil 101B in the second charging path may also be referred to as a second wireless charging coil, and the circuit between the coil 101B and the battery 104 may be referred to as a second wireless charging circuit.

When the charging device 01 is laid on a horizontal plane, the coil 101A and the coil 101B may be laid on the same horizontal plane, and projections of the coil 101A and the coil 101B on a first plane do not overlap, where the first plane is any plane perpendicular to the axial direction of the coil 101A and/or the coil 101A. Optionally, the coil 101A and the coil 101B are located on the same plane, for example, the coil 101A and the coil 101B are spaced apart from each other on the first plane. It should be understood that the

coils

101A and 101B are located in the same plane including, but not limited to: the top surface of the coil 101A and the top surface of the coil 101B are located on the same plane; alternatively, the bottom surface of the coil 101A and the bottom surface of the coil 101B are located on the same plane; alternatively, the top surface of the coil 101A and the bottom surface of the coil 101B are located on the same plane; alternatively, the bottom surface of the coil 101A and the top surface of the coil 101B are located on the same plane; or other implementations that lie in the same plane.

The Power supply device 02 comprises two Power supply paths, wherein a first Power supply path comprises a coil 201A and a Power Transmitter (TX) 202, and a second Power supply path comprises a coil 201B and the TX202. The

coils

201A and 201B are connected in parallel to a first terminal of the TX202, and a second terminal of the TX202 is connected to a power supply. TX202 converts dc power to ac power and supplies the ac power to coils 201A and 201B. The

coils

201A and 201B are used to transmit electric energy.

Coil 201A may also be referred to herein as a third wireless charging coil, and coil 201B may also be referred to as a fourth wireless charging coil.

When the device 02 is placed flat on a horizontal plane, the coil 201A and the coil 201B are placed flat on the same horizontal plane, and projections of the coil 201A and the coil 201B on a second plane do not overlap, wherein the second plane is any plane perpendicular to the axial direction of the coil 201A and/or the coil 201A. Optionally, the coil 201A and the coil 201B are located on the same plane, for example, the coil 201A and the coil 201B are spaced apart from each other and disposed on a second plane. It should be understood that the

coils

201A and 201B are located in the same plane including, but not limited to: the top surface of coil 101A and the top surface of coil 101B are at 20; alternatively, the bottom surface of the coil 101A and the bottom surface of the coil 101B are located on the same plane; alternatively, the top surface of the coil 101A and the bottom surface of the coil 101B are located on the same plane; alternatively, the bottom surface of the coil 101A and the top surface of the coil 101B are located on the same plane; or other implementations that lie in the same plane.

During charging, the power supply device 02 and the charging device 01 approach each other in a preset posture, the coil 201A is coupled with the coil 101A (for example, the coil 201A and the coil 101A are coaxial/approximately coaxial, and the plane of the coil 201A is parallel/approximately parallel to the plane of the coil 101A, or the coil 201A is aligned with the coil 101A), the coil 201B is coupled with the coil 101B (for example, the coil 201B is coaxial/approximately coaxial with the coil 101B, and the plane of the coil 201B is parallel/approximately parallel to the plane of the coil 101B, or the coil 201B is aligned with the coil 101B), so as to generate an electromagnetic induction phenomenon, thereby realizing wireless charging, and the coil in the power supply device 02 transmits a wireless charging signal to the coil in the charging device 01, that is: when alternating current passes through the coil 201A in the power supply device 02, the coil 201A generates a changing magnetic field in the surrounding environment, and the coil 101A in the surrounding environment generates an induced electromotive force to generate alternating current; when an alternating current passes through the coil 201B in the power supply device 02, the coil 201B generates a changing magnetic field in the surrounding environment, and the coil 101B located in the surrounding environment generates an induced electromotive force to generate an alternating current.

It should be understood that, in the scenario shown in fig. 4, the first power supply path supplies power to the first charging path, and the second power supply path supplies power to the second charging path, that is, the coil 201A transmits power to the coil 101A, and the coil 201B transmits power to the coil 101B (the dashed arrow indicates the power transmission direction), but the present invention is not limited thereto.

It should be understood that in the scenario shown in fig. 4, the preset posture is taken as an example where the charging device 01 is placed flat above the power supply device 02 (i.e., the bottom surface of the charging device 01 is close to the top surface of the power supply device 02), but in a specific implementation, other postures are also possible. For example, power supply device 02 is laid flat above charging device 01 (the top surface of charging device 01 is close to the bottom surface of power supply device 02), or power supply device 02 and charging device 01 are located on the same horizontal plane (the side surface of charging device 01 is close to the side surface of power supply device 02), and the like, and the present application is not limited thereto.

In a specific implementation, two coils that transmit electric energy to each other may not have a strict coaxial relationship and a strict parallel relationship, and may have a certain deviation. For example, the projection of the coil 201A on a third plane at least partially overlaps with the projection of the coil 101A on the third plane, where the third plane is any plane perpendicular to the axial direction of the coil 201A and/or the coil 101A, and the plane on which the coil 201A is located and the plane on which the coil 101A is located may have a slight included angle (e.g., 0 to 30 °). For example, the projection of the coil 201B on a fourth plane at least partially overlaps with the projection of the coil 101B on the fourth plane, where the fourth plane is any plane perpendicular to the axial direction of the coil 201B and/or the coil 101B, and the plane on which the coil 201B is located and the plane on which the coil 101B is located may have a slight included angle (e.g., 0 to 30 °). In other words, at the time of charging, when the alignment relationship of the coil of the charging apparatus 01 and the coil of the power feeding apparatus 02 is slightly shifted, charging may be performed.

In a specific implementation, the inductance of the coil of the charging device 01 and the inductance of the coil of the power supply device 02 may be the same or different, and the present application does not limit this; the inductance of the coil 101A and the inductance of the coil 101B may be the same or different, which is not limited in the present application; the inductance of the coil 201A and the inductance of the coil 201B may be the same or different, and the present application does not limit this. Parameters that affect the inductance of the coil include, but are not limited to: the number of turns of the coil, the winding method of the coil, the material of the coil, the thickness of the coil, and the like.

In a specific implementation, the coil in the charging device 01 and the coil in the power supply device 02 may have various coupling relationships. In other words, during charging, the following may be: the coil 201A is coaxial/approximately coaxial with the coil 101A, the coil 201A transmits electric energy to the coil 101A, the coil 201B is coaxial/approximately coaxial with the coil 101B, and the coil 201B transmits electric energy to the coil 101B, which may be: coil 201A is coaxial/near coaxial with coil 101B, coil 201A transmits electrical energy to coil 101B, coil 201B is coaxial/near coaxial with coil 101A, and coil 201B transmits electrical energy to coil 101A. The power transmitted between two coils (e.g., the coil 201A and the coil 101A, or the coil 201B and the coil 101B) is determined by the inductance of the two coils.

In the present embodiment, the controller 103 is a neural center and a command center of the entire charging system. RX102A and RX102B may have simple processing functions and communication functions in addition to the AC/DC conversion function. RX102A and RX102B adopt a master-slave control mode, that is, one RX of RX102A and RX102B is a master RX and the other is a slave RX, where the master RX is used for communicating with TX202 in power supply device 02, and controller 103 may adjust an operating state of a charging path in which the master RX is located (for example, output power for supplying electric energy to battery 104) by controlling the master RX to communicate with the TX, and an operating state of a charging path in which the slave RX is located (for example, output power for supplying electric energy to battery 104) may also change with the adjustment of the operating state of the charging path in which the master RX is located.

Specifically, taking the main RX as the RX102A as an example, when the controller 103 needs to adjust the output power of the first charging path and the second charging path for delivering the electric energy to the battery 104, the controller 103 sends a control command to the RX 102A; RX102A converts the control command into a first control signal to TX202. After receiving the first control signal, the TX202 adjusts the output power of the TX202, and then the output power of the coil 201A is correspondingly adjusted, and the receiving power of the coil 101A also changes with the change of the output power of the coil 201A; meanwhile, since the coil 201A and the coil 201B are simultaneously connected in parallel to the power of the TX202, the output power of the coil 201B is adjusted accordingly, and the received power of the coil 101B is also changed with the change of the output power of the coil 201B. Since the power of both the

coils

101A and 101B is changed, the output power of the first charging path and the second charging path for supplying the electric energy to the battery 104 is changed. In this way, the controller 103 can change the operating states of the two charging paths by controlling the first charging path.

It should be understood that, since there is only one TX (i.e., TX 202) in the power supply device 02 and both the

coils

201A and 201B are connected to the TX202, when the power of the TX202 is changed, the transmission power of both the

coils

201A and 201B is changed, but the power value and the change value of the

coils

201A and 201B may be the same or different. For example, if the inductance of the

coils

201A and 201B is the same, the power and power variation values of the

coils

201A and 201B are the same; if the inductance of

coils

201A and 201B is different, the power and/or the power variation of

coils

201A and 201B may be different.

In some embodiments, RX102A and TX202 may communicate based on electromagnetic induction between coils. For example, RX102A transmits an ac electrical signal with a preset frequency and/or amplitude to coil 101A, so that coil 101A generates a magnetic field with a preset intensity in the surrounding environment, coil 201A in the surrounding environment generates an induced electromotive force with a preset magnitude to generate an ac electrical signal with a preset frequency and/or amplitude, then coil 201A transmits the electrical signal with the preset frequency and/or amplitude to TX202, and TX202 receives the electrical signal with the preset frequency and/or amplitude to adjust its power output. The meaning (for example, the power value to be adjusted) represented by the electrical signal with the preset frequency and/or amplitude may be a protocol specification, or may be a pre-agreement between the power supply device 02 and the charging device 01, which is not limited in this application.

Of course, RX102A and TX202 may communicate with each other in other manners, which is not limited in this application. For example, bluetooth modules may also be provided in RX102A and TX202, with RX102A and TX202 communicating based on bluetooth.

In some embodiments, the RX102A may monitor information such as voltage, current, and temperature on a first charging path (i.e., a path from the coil 101A to the battery 104) where the RX102A is located, generate first monitoring information, and report the first monitoring information to the controller 103; the RX102B monitors information such as voltage, current, and temperature on a second charging path (i.e., a path from the coil 101B to the battery 104) where the RX is located, generates second monitoring information, and reports the second monitoring information to the controller 103. Further, the controller 103 may adjust the operating states of the two charging paths according to the monitoring information reported by the RX102A, RX B.

Therefore, the working state of each charging path can be controlled more accurately.

In some embodiments, at least one power supply path of the power supply device 02 is further provided with a switch, and the RX102A may communicate with the TX202 by controlling the RX102A, for example, the RX102A sends a second control signal to the TX202, so that the TX202 controls an on/off state of the switch, and realizes switching between single-path charging and dual-path charging.

For example, referring to fig. 5, a switch 203A is provided between the coils 201A and TX202, and a switch 203B is provided between the coils 201B and TX202. The controller 103 controls the RX102A to communicate with the TX202, so that the TX202 switches the on/off states of the switch 203A and the switch 203B, thereby realizing the switching between the single-path charging mode and the dual-path charging mode. For example, when both the switch 203A and the switch 103B are turned on, the two-way charging mode is selected; when the switch 203A is turned on and the switch 203B is turned off or the switch 203B is turned on and the switch 203A is turned off, the one-way charging mode is performed.

In addition, controller 103 may also implement switching between single-path charging and dual-path charging by controlling yes/no operations of RX102A and RX 102B.

Therefore, the switching between the single-path charging mode and the double-path charging mode can be realized, and the flexibility of the charging scheme is improved. For example, in the initial charging stage, when the electric quantity of the charging equipment 01 is small, the electric quantity demand is large, and a double-path charging mode can be adopted to realize quick charging; when the electric quantity of the charging equipment 01 is about to be full, the electric quantity demand is small, and a one-way charging mode can be adopted, so that the waste of energy sources is reduced or even avoided.

In some embodiments, other components may be further included in each charging path of the charging device 01.

Illustratively, referring to fig. 6, on the first charge path, between RX102A and battery 104, there may also be voltage varying components, such as DC/DC105A, N:1 circuit component 106A; there may also be voltage varying components, such as DC/DC105B, N:1 circuit component 106B, etc., on the second charge path between RX102B and battery 104. The DC/DC may be a diode, a field effect transistor (MOS), a Low Dropout Regulator (LDO), a boost DC, a buck DC, or a buck-boost DC. Optionally, the N:1 circuit component may be an SC switched capacitor or DC converter such as 1:1, 2:1, 3:1 or 4:1.

When the controller 103 adjusts the operating state of each charging path, in addition to controlling the main RX to communicate with the power supply device 02 to adjust the power of the TX202 in the power supply device 02, the controller 103 may also directly adjust the operating parameters (such as output impedance) of each component on each charging path, so as to adjust the operating state of the charging path. For example, the controller 103 may further adjust the output power of each charging path by adjusting the frequency, duty cycle, resonant frequency, etc. of the RX on each charging path, or by adjusting the output impedance of the DC/DC or N:1 circuit components, etc. on each charging path.

In some embodiments, the controller 103 may be any Device having a control function, such as a System-on-a-chip System (SOC), a Field-Programmable Gate Array (FPGA), an Application-specific Integrated Circuit (ASIC), an Application-specific Standard Product (Application-specific Standard Product, CPLD), a Complex Programmable Logic Device (CPLD), a special purpose computer, and the like, which are not limited in this Application.

In some embodiments, the thickness of the coil 101A may be less than or equal to 0.25mm and the coil 101B may be less than or equal to 0.25mm.

Based on the foregoing, unlike the prior art that the charging power of the charging device is raised by raising the voltage or current of the single coil, in the embodiment of the present application, two independent coils are respectively provided in the charging device 01 and the power supply device 02 to raise the wireless charging power. Because two coils in the charging device are placed in the charging device 01 in a flat mode, the thickness of the charging device 01 cannot be increased; meanwhile, because each coil in the charging device 01 is independently provided with the RX chip, the power supersaturation of the RX chip can be avoided; in addition, two coils in the power supply device 02 share one TX chip, which also saves hardware cost. Therefore, the wireless charging system provided by the embodiment of the application can realize the improvement of the charging power on the premise of not increasing the thickness, heat and chip power of the whole charging equipment.

Fig. 4 to fig. 6 are examples of a charging device and a power supply device with two coils, but in specific implementation, based on the same technical concept, the wireless charging system can be extended to a larger number of coils to further increase the charging power. For example, referring to fig. 7, an example in which three coils are provided in a charging device and a power supply device respectively is provided, wherein the charging device includes three coils (i.e., coil 101A, coil 101B, and coil 101C), each coil has an independent RX chip (i.e., RX102A, RX102B, RX C), the power supply device includes three coils (i.e., coil 201A, coil 201B, and coil 201C), the three coils share one TX (i.e., TX 202), and RX102A can communicate with TX202. For a specific charging implementation manner of the system, reference may be made to the related descriptions of the wireless charging system shown in fig. 4 to fig. 6, and details are not described herein again.

Example 2

The present embodiment describes a scheme in which the charging device is provided with a dual coil or multiple coils, and the power supply device is provided with a single coil.

Referring to fig. 8, a schematic structural diagram of another wireless charging system provided in the embodiment of the present application includes: a charging device 03 and a power supply device 04. The charging device 03 may also be referred to as a first electronic device, and the power supply device 04 may also be referred to as a second electronic device.

The charging device 01 includes two charging paths (for distinguishing from the "first charging path" and the "second charging path" in embodiment 1, the two charging paths are respectively named as a "third charging path" and a "fourth charging path"), wherein the third charging path includes a coil 301A, RX a, the fourth charging path includes a coil 301B, RX B, and the two charging paths are connected in parallel with the battery 304 in the charging device 03. In the third charging path, a first terminal of the RX302A is connected to the coil 301A, a second terminal of the RX302A is connected to the battery 304, the coil 301A is configured to receive electric energy (or a wireless charging signal) to generate an alternating current, and the RX302A is configured to convert the alternating current generated by the coil 301A into a direct current and transmit the direct current to the battery 304. In the fourth charging path, a first terminal of the RX302B is connected to the coil 301B, a second terminal of the RX302B is connected to the battery 304, the coil 301B is configured to receive electric energy (or a wireless charging signal) to generate an alternating current, and the RX302B is configured to convert the alternating current generated by the coil 301B into a direct current and transmit the direct current to the battery 304. The charging device 03 further includes a controller 303, which is connected to the two charging paths at the same time, and is configured to monitor and control the operating states of the charging paths.

The third charging path may also be referred to as a first wireless charging path, and the fourth charging path may also be referred to as a second wireless charging path. The coil 301A in the third charging path may also be referred to as a first wireless charging coil, and the circuit between the coil 301A and the battery 304 may be referred to as a first wireless charging circuit; the coil 301B in the fourth charging path may also be referred to as a second wireless charging coil, and the circuit between the coil 301B and the battery 304 may be referred to as a second wireless charging circuit.

When the charging device 03 is laid flat on a horizontal plane, the coil 301A and the coil 301B are in a stacked relationship on the same horizontal plane, and projections of the coil 301A and the coil 301B on a fifth plane overlap, where the fifth plane is any plane perpendicular to the axial direction of the coil 301A and/or the coil 301A. Alternatively, the projections of the coil 301A and the coil 301B on the fifth plane are concentric circles, that is, the coil 301A and the coil 301B are coaxially arranged.

The power supply device 04 comprises a power supply path, the power supply path comprises a coil 401 and a TX402, the coil 401 is connected with a first end of the TX402, and a second end of the TX402 is connected with a power supply. TX402 is used to convert dc power received from a power source into ac power and deliver the ac power to coil 401. The coil 401 is used to transmit power (or a wireless charging signal). Wherein coil 401 may also be referred to as a third wireless charging coil.

During charging, the power supply device 04 and the charging device 03 approach each other in a preset posture, the coil 401 is coupled to the

coils

301A and 301B at the same time (for example, the

coils

401, 301A, and 301B are coaxial/approximately coaxial, the plane of the coil 401, the plane of the coil 301A, and the plane of the coil 301B are parallel/approximately parallel, or the coil 401 is aligned to the

coils

301A and 301B at the same time), the

coils

301A and 301B in the charging device 03 are electromagnetically induced with the coil 401 in the power supply device 04 respectively, so as to implement wireless charging, and the coil in the power supply device 04 transmits a wireless charging signal to the coil in the charging device 03, that is: when the alternating current passes through the coil 401 in the power supply apparatus 04, a changing magnetic field is generated in the surrounding environment, and the

coils

301A and 301B located in the surrounding environment generate induced electromotive forces, respectively, to generate alternating currents.

Similarly, in the scenario shown in fig. 8, the preset posture is taken as an example where the charging device 03 is placed flat above the power supply device 04 (i.e., the bottom surface of the charging device 03 is close to the top surface of the power supply device 04), but in a specific implementation, other postures may be adopted. For example, power supply device 04 is placed flat above charging device 03 (top surface of charging device 03 is close to bottom surface of power supply device 04), or power supply device 04 and charging device 03 are located on the same horizontal plane (side surface of charging device 03 is close to side surface of power supply device 04), and the like, and the present application is not limited thereto.

Similarly, in a specific implementation, the coil 301A, the coil 301B, and the coil 401 may not have a strict coaxial relationship or a strict parallel relationship, and may have a certain deviation. For example, projections of any two of the

coils

301A, 301B, and 401 partially overlap on a sixth plane, where the sixth plane is any plane perpendicular to the axial direction of the

coil

301A, 301B, or 401, and a plane on which any two of the

coils

301A, 301B, and 401 lie may have a slight included angle (e.g., 0 to 30 °). In other words, at the time of charging, when the alignment relationship between the charging apparatus 04 and the power supply apparatus 03 is slightly shifted, charging may be performed.

Similarly, in a specific implementation, the inductance of the coil of the charging device 03 and the inductance of the coil of the power supply device 04 may be the same or different, and the present application does not limit this; the inductance of the coil 301A and the inductance of the coil 301B may be the same or different, and the present application does not limit this. Parameters that affect the inductance of the coil include, but are not limited to: the number of turns of the coil, the winding method of the coil, the material of the coil, the thickness of the coil, and the like.

Similarly, the controller 303 is the neural and command center of the overall charging system. RX302A and RX302B may have simple processing functions and communication functions in addition to the AC/DC conversion function. RX302A and RX302B use a master-slave control mode, that is, one RX of RX302A and RX302B is a master RX, and the other RX is a slave RX, where the master RX is used for communicating with TX402 in power supply device 04, and controller 303 may adjust an operating state of a charging path in which the master RX is located (for example, output power for supplying electric energy to battery 304) by controlling the master RX to communicate with TX402, and an operating state of a charging path in which the slave RX is located (for example, output power for supplying electric energy to battery 304) may also change with the adjustment of the operating state of the charging path in which the master RX is located.

Taking the main RX as RX302A as an example, when the controller 303 needs to adjust the output power of the electric energy delivered to the battery 304 by the third charging path and the fourth charging path, the controller 303 sends a control command to RX 302A; RX302A converts the control command into a first control signal to be sent to TX402. After receiving the first control signal, TX402 adjusts the output power of TX402, and thus the output power of coil 401 is adjusted accordingly, so that the received power of coil 301A and coil 301B also changes with the output power of coil 401. In this way, the controller 303 may change the operating states of the two charging paths by controlling the third charging path.

It should be understood that, since the coil 301A and the coil 301B of the charging device 03 are both coupled to the coil 401 in the power supply device 04, once the transmission power of the coil 401 is changed, both the coil 301A and the coil 301B are changed, but the power values and the change values of the coil 301A and the coil 301B may be the same or different. For example, if the inductance of

coils

301A and 301B is the same, then the power and power variation values of

coils

301A and 301B are the same; the power and/or power variation values of

coils

301A and 301B may be different if the inductance of

coils

301A and 301B is different.

Similarly, RX302A and TX402 may communicate based on electromagnetic induction between coils, or may communicate based on other means (e.g., bluetooth), and the application is not limited thereto. For a specific implementation manner of the RX302A and the TX402, reference may be made to the above specific implementation manner of the RX102A and the TX202 in embodiment 1, and details are not described here.

Similarly, the RX302A may monitor information such as voltage, current, and temperature on a third charging path (i.e., a path from the coil 301A to the battery 304) where the RX302A is located, generate first monitoring information, and report the first monitoring information to the controller 303; RX302B monitors the voltage, current, temperature, etc. of its own fourth charging path (i.e., the path from coil 301B to battery 304), generates second monitoring information, and reports the second monitoring information to controller 303. Further, the controller 303 may adjust the operating states of the two charging paths according to the monitoring information reported by the RX302A, RX B. Therefore, the working state of each charging path can be controlled more accurately.

Similarly, controller 303 may implement the switching between single-path charging and dual-path charging by controlling yes/no operations of RX302A and RX 302B. Therefore, the switching between the single-path charging mode and the double-path charging mode can be realized, and the flexibility of the charging scheme is improved.

Similarly, other components may be included in each charging path of the charging device 03. For example, on the third charging path, between RX302A and battery 304, there may also be DC/DC, N:1 circuit components, etc.; on the fourth charge path, between RX302B and battery 304, there may also be DC/DC, N:1 circuit components, etc. When adjusting the operating state of each charging path, in addition to the above-mentioned effect of adjusting the transmission power of the coil on the power supply device 04 by controlling the main RX to communicate with the power supply device 04 to adjust the reception power of the coil on the charging device 03, the controller 303 may also directly adjust the operating parameters (e.g., output impedance) of each component on each path to adjust the operating state power on the path. For specific implementation, reference may be made to the related description in embodiment 1, and details are not described here. Therefore, the working state of each charging path can be controlled more accurately.

Similarly, the controller 303 may be any device having a control function, and specific reference may be made to the specific description of the controller 103 in embodiment 1, which is not described herein again.

In some embodiments, the overall thickness of coil 301A and coil 301B is less than or equal to 0.25mm. With the bottom surface of coil 301B disposed opposite the top surface of coil 301A as shown in FIG. 8, the distance from the top surface of coil 301B to the bottom surface of coil 301A is less than or equal to 0.25mm. In one possible design, the upper and lower A, B parts of the coil shown in fig. 3 can be separated, and then the A, B parts are used as the coil 301A and the coil 301B, so that the process difficulty can be reduced, the thickness of the coil 301A and the coil 301B is ensured to be consistent with that of the original coil (namely, the coil shown in fig. 3), and the influence on the complete machine ID of the charging equipment is reduced as much as possible. It should be understood that the two stacked coils in the present embodiment are designed based on a single coil with a thickness of 0.25mm, and in particular, the two stacked coils in the present embodiment are designed based on single coils with other thicknesses.

Based on the above, in the embodiment of the present application, unlike the prior art that the charging power of the charging device is raised by raising the voltage or current of the single coil, the embodiment of the present application raises the wireless charging power by setting two stacked coils in the charging device 03. In terms of manufacturing process, the existing single coil can be stacked after being thinned, so that the thickness of the charging equipment 03 is not increased; because the two coils stacked in the charging device 03 are respectively and independently provided with the RX chip, the power supersaturation of the RX chip can be avoided; in addition, only one coil and one TX chip are needed in the power supply device 04, so that the existing power supply device can be reused (i.e., the power supply device is not changed), and hardware cost is further saved. Therefore, the wireless charging system provided by the embodiment of the application can effectively improve the charging power on the premise of not increasing the thickness, heat and chip power of the whole charging equipment.

In the above fig. 8, the charging device is exemplified by stacking two coils, and in the specific implementation, based on the same technical concept, the wireless charging system can be extended to a larger number of coils to further increase the charging power. For example, referring to fig. 9, an example is provided in which three stacked coils are provided for a charging device, where the charging device includes three coils (i.e., coil 301A, coil 301B, coil 301C), each with a separate RX chip (i.e., RX302A, RX302B, RX C), the power supply device includes a single coil and a single TX constant, and RX302A can communicate with TX402. For a specific implementation of the system, reference may be made to the related description of the wireless charging system shown in fig. 8, and details are not described here.

The above describes a scheme in which the charging device is provided with a double coil or a multiple coil and the power supply device is provided with a double coil or a multiple coil (i.e., embodiment 1), and a scheme in which the charging device is provided with a double coil or a multiple coil and the power supply device is provided with a single coil (i.e., embodiment 2), respectively. In particular, the two schemes can be combined with each other.

Example 3

Referring to fig. 10, a schematic structural diagram of another wireless charging system provided in the embodiment of the present application includes: a charging device 05 and a power supply device 06. Here, the charging device 05 may also be referred to as a first electronic device, and the power supply device 06 may also be referred to as a second electronic device.

The charging device 05 comprises a battery 504 and three charging paths respectively connected with the battery 504, wherein a first charging path (or referred to as a first wireless charging path) sequentially comprises a coil 501A, RX a, a second charging path (or referred to as a second wireless charging path) sequentially comprises a coil 501B, RX B, and a third charging path (or referred to as a third wireless charging path) sequentially comprises a coil 501C, RX C. Where coils 501B and 501C are in a stacked relationship and coil 501A is in a generally flat relationship with the stacked coils (i.e., coils 501B and 501C). The charging device 05 further includes a controller 503, connected to the three power supply paths, respectively, for monitoring and controlling the operating states of the power supply paths.

The power supply device 06 includes two power supply paths, wherein a first power supply path includes the coil 601A and the TX602 in sequence, and a second power supply path includes the coil 601B and the TX602 in sequence, that is, the coil 601A and the coil 601B are connected to the TX602 in parallel.

Coil 501A can also be referred to as a first wireless charging coil, coil 501B can also be referred to as a second wireless charging coil, coil 601A can also be referred to as a third wireless charging coil, coil 601B can also be referred to as a fourth wireless charging coil, and coil 501C can also be referred to as a fifth wireless charging coil. The circuit between coil 501A and battery 504 may be referred to as a first wireless charging circuit, the circuit between coil 501B and battery 504 may be referred to as a second wireless charging circuit, and the circuit between coil 501C and battery 504 may be referred to as a third wireless charging circuit.

When charging, coil 601A is coupled with coil 501A, i.e. coil 501A receives a wireless charging signal from coil 601A; coils 501B and 501C are both coupled to coil 601B, i.e., coil 501B receives a wireless charging signal from coil 601B and coil 501C receives a wireless charging signal from coil 601B. The controller 503 may adjust the output power of the

coils

601A, 601B by controlling the primary RX (e.g., RX 502A) in RX502A, RX502B, RX C to communicate with TX602, thereby causing the received power of

coils

501A, 501B, 501C to change. The controller 503 realizes the effect of changing the operating state of multiple charging paths by controlling one charging path.

For a specific implementation of the wireless charging system shown in fig. 10, reference may be made to the detailed descriptions of the related embodiments in fig. 4 to fig. 9, which are not described again here.

Based on the same technical concept, the embodiment of the present application further provides a wireless charging method, which may be applied to any one of the wireless charging systems shown in fig. 4 to 10.

Referring to fig. 11, the method includes:

s1101, the second electronic device sends a wireless charging signal;

s1102, a first wireless charging coil in the first electronic device receives a wireless charging signal from the second electronic device, and a battery of the first electronic device is charged through a first wireless charging circuit; and a second wireless charging coil in the first electronic equipment receives a wireless charging signal from the second electronic equipment, and a battery of the first electronic equipment is charged through a second wireless charging circuit.

The specific implementation manner of the second electronic device for executing the method steps may refer to the specific implementation manner of the power supply device 02, the power supply device 04, or the power supply device 06 for executing the corresponding method steps, and the specific implementation manner of the first electronic device for executing the method steps may refer to the specific implementation manner of the charging device 01, the charging device 03, or the charging device 05 for executing the corresponding method steps, which is not described herein again.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Versatile Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A wireless charging system, comprising a first electronic device and a second electronic device;

the first electronic device at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic device through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic device through the second wireless charging circuit;

the first wireless charging coil is configured to receive a wireless charging signal of a second electronic device, and a battery of the first electronic device is charged through the first wireless charging circuit;

the second wireless charging coil is configured to receive a wireless charging signal of a second electronic device, and a battery of the first electronic device is charged through the second wireless charging circuit.

2. The system of claim 1,

the first wireless charging coil and the second wireless charging coil are stacked in a first direction, wherein the first direction is parallel to an axial direction of the first wireless charging coil and/or the first direction is parallel to an axial direction of the second wireless charging coil;

the second electronic device comprises a third wireless charging coil;

the first wireless charging coil is configured to receive a wireless charging signal for a second electronic device, comprising:

the first wireless charging coil is configured to couple with the third wireless charging coil, receiving a wireless charging signal of the second electronic device;

the second wireless charging coil is configured to receive a wireless charging signal of a second electronic device, comprising:

the second wireless charging coil is configured to couple with the third wireless charging coil, receiving a wireless charging signal of the second electronic device.

3. The system of claim 2, wherein the first wireless charging coil is disposed coaxially with the second wireless charging coil.

4. The system of claim 2 or 3, wherein a bottom surface of the first wireless charging coil is disposed opposite a top surface of the second wireless charging coil, a distance from the top surface of the first wireless charging coil to the bottom surface of the second wireless charging coil is less than or equal to 0.25mm.

5. The system of claim 1,

the first wireless charging coil and the second wireless charging coil are spaced apart in a first plane, the first plane is perpendicular to an axial direction of the first wireless charging coil and/or the first plane is perpendicular to an axial direction of the second wireless charging coil, a projection of the first wireless charging coil on the first plane and a projection of the second wireless charging coil on the first plane do not intersect;

the second electronic device comprises a third wireless charging coil and a fourth wireless charging coil, the third wireless charging coil and the fourth wireless charging coil are arranged on a second plane at intervals, the second plane is perpendicular to the axial direction of the third wireless charging coil and/or the second plane is perpendicular to the axial direction of the fourth wireless charging coil, and the projection of the third wireless charging coil on the second plane does not intersect with the projection of the fourth wireless charging coil on the second plane;

the first wireless charging coil is configured to receive a wireless charging signal of a second electronic device, comprising:

the first wireless charging coil is coupled with the third wireless charging coil and receives a wireless charging signal of the second electronic device;

the second wireless charging coil is configured to receive a wireless charging signal of a second electronic device, comprising

The second wireless charging coil is coupled with the fourth wireless charging coil and receives a wireless charging signal of the second electronic device.

6. The system of claim 5, wherein a thickness of the first wireless charging coil is less than or equal to 0.25mm and a thickness of the second wireless charging coil is less than or equal to 0.25mm.

7. The system of claim 5 or 6, wherein the first electronic device further comprises a fifth wireless charging coil;

the second wireless charging coil and the fifth wireless charging coil are arranged in a stacked manner along a second direction, wherein the second direction is parallel to the axial direction of the second wireless charging coil and/or the second direction is parallel to the axial direction of the fifth wireless charging coil;

the fifth wireless charging coil is coupled with the fourth wireless charging coil, receives the wireless charging signal of the second electronic device, and charges the battery of the first electronic device.

8. The system of any one of claims 1-7,

the first wireless charging circuit is further used for sending a first control signal to the second electronic device;

in response to the first control signal, the second electronic device adjusts wireless charging power.

9. The system of claim 8, wherein the first electronic device further comprises a processor;

the first wireless charging circuit is further used for sending first monitoring information to the processor;

the second wireless charging circuit is further used for sending second monitoring information to the processor;

the processor is configured to: and instructing the first wireless charging circuit to send the first control signal to the second electronic device according to the first monitoring information and the second monitoring information.

10. The system of claim 5,

the second electronic device further comprises a switch;

the first wireless charging circuit is further used for sending a second control signal to the second electronic device;

in response to the second control signal, the second electronic device performs at least:

controlling the third wireless charging coil to be connected or disconnected with a wireless charging circuit of the second electronic device through the switch; or the like, or a combination thereof,

and controlling the fourth wireless charging coil to be connected with or disconnected from a wireless charging circuit of the second electronic equipment through the switch.

11. The charging method is applied to a wireless charging system, wherein the wireless charging system comprises a first electronic device and a second electronic device; the first electronic device at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic device through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic device through the second wireless charging circuit;

the method comprises the following steps:

the second electronic device sends a wireless charging signal;

the first wireless charging coil receives a wireless charging signal from the second electronic device, and a battery of the first electronic device is charged through the first wireless charging circuit;

the second wireless charging coil receives a wireless charging signal from the second electronic device, and the battery of the first electronic device is charged through the second wireless charging circuit.

12. The method of claim 11, wherein the first wireless charging coil and the second wireless charging coil are disposed in a stack along a first direction, wherein the first direction is parallel to an axial direction of the first wireless charging coil and/or the first direction is parallel to an axial direction of the second wireless charging coil; the second electronic device comprises a third wireless charging coil;

the second electronic device sends a wireless charging signal, including:

the third wireless charging coil sends the wireless charging signal;

the first wireless charging coil receiving a wireless charging signal from the second electronic device, comprising:

the first wireless charging coil receiving a wireless charging signal from the third wireless charging coil when the first wireless charging coil is coupled with the third wireless charging coil;

the second wireless charging coil receiving a wireless charging signal from the second electronic device, comprising:

the second wireless charging coil receives a wireless charging signal from the third wireless charging coil when the second wireless charging coil is coupled with the third wireless charging coil.

13. The method of claim 11, wherein the first wireless charging coil is spaced apart from the second wireless charging coil in a first plane, the first plane perpendicular to an axial direction of the first wireless charging coil and/or the first plane perpendicular to an axial direction of the second wireless charging coil, a projection of the first wireless charging coil on the first plane does not intersect a projection of the second wireless charging coil on the first plane; the second electronic device comprises a third wireless charging coil and a fourth wireless charging coil, the third wireless charging coil and the fourth wireless charging coil are arranged on a second plane at intervals, the second plane is perpendicular to the axial direction of the third wireless charging coil and/or the second plane is perpendicular to the axial direction of the fourth wireless charging coil, and the projection of the third wireless charging coil on the second plane does not intersect with the projection of the fourth wireless charging coil on the second plane;

the second electronic device sends a wireless charging signal, including:

the third wireless charging coil sends a first wireless charging signal, and the fourth wireless charging coil sends a second wireless charging signal;

the first wireless charging coil receives the first wireless charging signal when the first wireless charging coil is coupled with the third wireless charging coil;

the second wireless charging coil receives a wireless charging signal from the second electronic device, comprising:

the second wireless charging coil receives the second wireless charging signal when the first wireless charging coil is coupled with the fourth wireless charging coil.

14. The method of claim 13, wherein the first electronic device further comprises a fifth wireless charging coil; the second wireless charging coil and the fifth wireless charging coil are arranged in a stacked manner along a second direction, wherein the second direction is parallel to the axial direction of the second wireless charging coil and/or the second direction is parallel to the axial direction of the fifth wireless charging coil;

the method further comprises the following steps:

when the fifth wireless charging coil is coupled with the fourth wireless charging coil, the fifth wireless charging coil receives a wireless charging signal of the second electronic device and charges a battery of the first electronic device.

15. The method of any one of claims 11-14, further comprising:

the first wireless charging circuit sends a first control signal to the second electronic device;

16. The method of claim 15, wherein the first electronic device further comprises a processor;

the method further comprises the following steps:

the first wireless charging circuit sends first monitoring information to the processor, and the second wireless charging circuit sends second monitoring information to the processor;

the processor instructs the first wireless charging circuit to send the first control signal to the second electronic device according to the first monitoring information and the second monitoring information.

17. The method of claim 13, wherein the second electronic device further comprises a switch;

the method further comprises the following steps:

the first wireless charging circuit sends a second control signal to the second electronic device;

in response to the second control signal, the second electronic device performs at least: controlling the third wireless charging coil to be connected or disconnected with a wireless charging circuit of the second electronic device through the switch; or the switch is used for controlling the fourth wireless charging coil to be connected with or disconnected from a wireless charging circuit of the second electronic device.

18. A charging device is characterized in that a charging device is provided,

the charging device at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the charging device through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the charging device through the second wireless charging circuit;

the first wireless charging coil is configured to receive a wireless charging signal of a wireless charging stand, and a battery of the charging device is charged through the first wireless charging circuit;

the second wireless charging coil is configured to receive a wireless charging signal of the wireless charging stand, and a battery of the charging device is charged through the second wireless charging circuit.

19. A charging method is applied to a first electronic device; the first electronic device at least comprises a first wireless charging path and a second wireless charging path, the first wireless charging path comprises a first wireless charging coil and a first wireless charging circuit, the second wireless charging path comprises a second wireless charging coil and a second wireless charging circuit, the first wireless charging coil is electrically connected with a battery of the first electronic device through the first wireless charging circuit, and the second wireless charging coil is electrically connected with the battery of the first electronic device through the second wireless charging circuit;

the method comprises the following steps: