CN116345730A

CN116345730A - Wireless charging module, device and system

Info

Publication number: CN116345730A
Application number: CN202310371964.6A
Authority: CN
Inventors: 章哲; 夏凡; 张彬; 张寒锋; 亿一德
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-06-27

Abstract

The embodiment of the application provides a wireless charging module, equipment and a system. The wireless charging module comprises: a coil for wirelessly transmitting power; the annular magnet is arranged on the periphery of the coil, the annular magnet is of an integrated structure, the coil is surrounded by the inner ring of the annular magnet, and a gap is reserved between the inner ring of the annular magnet and the coil. Among the above-mentioned technical scheme, wireless module that charges can be applied to transmitting terminal or receiving terminal, and the annular magnet of integral type can realize wireless coupling coil's that charges position alignment more accurately to improve wireless charging efficiency.

Description

Wireless charging module, device and system

Technical Field

The embodiment of the application relates to the technical field of wireless charging, and in particular relates to a wireless charging module, equipment and a system.

Background

Wireless charging refers to a way of charging using the principle of electromagnetic induction. The wireless charging system comprises a transmitting end and a receiving end, wherein the transmitting end converts electric energy into electromagnetic waves and transmits the electromagnetic waves in space, and the receiving end receives the electromagnetic waves and converts the electromagnetic wave energy into electric energy so as to finally realize wireless charging.

With the wide application of wireless charging technology, users also put higher demands on wireless charging devices, in particular, the charging efficiency of the wireless charging devices. Whether the coil is aligned in position or not when the transmitting end and the receiving end are coupled for charging is a key factor affecting wireless charging efficiency.

Currently, magnetic positioning technology is generally used to achieve the position alignment of the transmitting end coil and the receiving end coil, for example, a small magnet array is arranged outside the coil, and the attraction force between the magnets is used to achieve the matching of the positions of the coils. However, the current magnetic positioning technology still has the problem of inaccurate positioning, which results in low charging efficiency and influences user experience.

Disclosure of Invention

The embodiment of the application provides a wireless module, equipment and system that charges, can realize wireless position alignment who charges coupling coil more accurately to improve wireless charging efficiency.

In a first aspect, a wireless charging module is provided, including: a coil for wirelessly transmitting power; the annular magnet is arranged on the periphery of the coil, the annular magnet is of an integrated structure, the coil is surrounded by the inner ring of the annular magnet, and a gap is reserved between the inner ring of the annular magnet and the coil.

The wireless charging module provided by the embodiment of the application can be applied to a transmitting end and/or a receiving end. On the one hand, because the annular magnet that the coil periphery set up is integrated into one piece, has reduced the magnetic leakage phenomenon, and the closure of magnetic field is better, can improve the magnetic attraction between transmitting end and the receiving end, can realize the position alignment of wireless coupling coil that charges like this more accurately to improve wireless charging efficiency. On the other hand, the integrated annular magnet is arranged on the periphery of the coil, so that a tight and closed magnetic force line can be formed, the internal magnetic field of the wireless charging coil cannot be greatly influenced, and the wireless charging efficiency can be improved.

In addition, the leakage magnetic field of the integrated annular magnet is small, the distance between the magnet and the coil can be reduced on the premise that the wireless charging coil is not affected, the coil or the magnet is designed in size, the wireless charging capacity is improved or the wireless charging efficiency is improved, and the light weight and the miniaturization of the module are realized.

With reference to the first aspect, in one possible implementation manner, the ring magnet is made of a permanent magnetic material or a soft magnetic material.

When the annular magnet is made of permanent magnetic materials, the wireless charging module can be applied to the transmitting end, so that when users use different receiving ends, the wireless charging can be performed through the same transmitting end.

When the ring magnet is made of soft magnetic material, the wireless charging module can be applied to the receiving end, so that adverse effects of the ring magnet in the receiving end on magnetic strips in bank cards or magnetic sensors in electronic products such as a digital compass and a magnetometer can be avoided when a user carries the wireless charging module.

With reference to the first aspect, in one possible implementation manner, the material of the ring magnet includes at least one of the following permanent magnetic materials: bonded NdFeB, bonded ferrite, samarium cobalt, aluminum nickel cobalt, sintered ferrite and sintered NdFeB; alternatively, the ring magnet may be made of at least one of the following soft magnetic materials: iron, iron nickel, iron silicon, amorphous, nanocrystalline.

The annular magnet made of the permanent magnet materials has certain flexibility, and the annular magnet cannot crack even if the thickness of the magnet is very thin. The annular magnet made of the soft magnetic materials has certain flexibility, is easy to process and has lower cost.

With reference to the first aspect, in one possible implementation manner, the thickness of the ring magnet is greater than or equal to 0.2 mm and less than or equal to 5 mm.

When the wireless charging module is applied to equipment with larger size, the thickness of the annular magnet can be designed to be larger, so that the space arrangement of the whole equipment is not affected, and coils with larger size or magnets with larger size can be arranged in enough space, and the charging capacity or the charging efficiency of the equipment are improved.

With reference to the first aspect, in one possible implementation manner, the thickness of the ring magnet is greater than or equal to 0.2 mm and less than or equal to 1 mm.

When the wireless charging module is applied to equipment with smaller size, the thickness of the annular magnet can be designed to be smaller, so that the charging capacity or the charging efficiency of the equipment can be ensured, and the wireless charging module is suitable for the development trend of miniaturized and light-weighted equipment.

With reference to the first aspect, in one possible implementation manner, a gap between an inner ring of the ring magnet and the coil is less than or equal to 2 millimeters.

The smaller gap between the inner ring of the annular magnet and the coil is beneficial to saving space or increasing the diameter of the coil or the volume of the magnet in a certain space so as to improve wireless charging capacity or wireless charging efficiency.

With reference to the first aspect, in one possible implementation manner, the magnetizing level of the ring magnet is greater than or equal to 1 and less than or equal to 8.

The magnetizing mode of the annular magnet can be monopole magnetizing or multipolar magnetizing. When the magnetizing stage number of the annular magnet is smaller, the positions between the transmitting end and the receiving end for positioning are fewer, and the combination form of the transmitting end and the receiving end can be more regular, so that the charging process is more attractive. When the magnetizing level of the annular magnet is larger, the positions between the transmitting end and the receiving end for positioning are more, and the user can select more positioning positions, so that the operation of the user can be facilitated.

With reference to the first aspect, in one possible implementation manner, the magnetizing direction of the ring magnet is axial multipole magnetizing or radial multipole magnetizing.

With reference to the first aspect, in one possible implementation manner, the wireless charging module is disposed in a vehicle.

The wireless charging module is arranged in the vehicle, so that a user can conveniently and wirelessly charge the vehicle-mounted ecological equipment by using the vehicle in a driving scene, and the problem of using pain points of various vehicle-mounted ecological equipment caused by different types and different positions of the power supply ports of the existing vehicle is solved. In addition, the vehicle supplies power for the vehicle-mounted ecological equipment in a wireless mode, so that the power supply mode can be unified, an exposed wire or a charging interface is not needed, and the attractiveness is improved. And the consumer electronic products are fixed in the vehicle in a magnetic attraction mode, so that the problem that the vehicle-mounted ecological equipment is unstable in fixation in the moving process of the vehicle can be avoided, and abnormal noise in running is reduced or avoided.

With reference to the first aspect, in one possible implementation manner, the wireless charging module is disposed at least one of a console, a seat back, a door inner armrest, a center armrest, a door inner trim panel, and a trunk of the vehicle.

With reference to the first aspect, in one possible implementation manner, the wireless charging module is fixedly installed in the vehicle as a front mounting.

The wireless charging module is used as a front part of the vehicle, an exposed wire or a charging interface is not needed, the beauty is improved, and the wireless charging module is favorable for meeting the individualized and diversified scene requirements of users.

With reference to the first aspect, in one possible implementation manner, the wireless charging module is installed in the vehicle through a detachable connection structure.

The wireless charging module is installed on the vehicle by adopting a detachable structure, so that a user can charge the vehicle-mounted ecological equipment at different positions of the vehicle conveniently by using the wireless charging module.

In a second aspect, a wireless charging device is provided, including the wireless charging module of the first aspect or any one of the possible implementation manners of the first aspect.

With reference to the second aspect, in one possible implementation manner, the wireless charging device is a vehicle.

With reference to the second aspect, in one possible implementation manner, the wireless charging module is disposed at least one of a console, a seat back, a door inner armrest, a center armrest, a door inner trim panel, and a trunk of the vehicle.

With reference to the second aspect, in one possible implementation manner, the wireless charging module is fixedly installed in the vehicle as a front mounting.

With reference to the second aspect, in one possible implementation manner, the wireless charging module is installed in the vehicle through a detachable connection structure.

In a third aspect, a wireless charging system is provided, comprising: the first device comprises a first wireless charging module, wherein the first wireless charging module comprises a first coil and a first magnet, the first magnet is annular, an inner ring of the first magnet surrounds the first coil, and a gap is reserved between the inner ring of the first magnet and the first coil; the second device comprises a second wireless charging module, the second wireless charging module comprises a second coil and a second magnet, the second magnet is annular, an inner ring of the second magnet surrounds the second coil, and a gap is reserved between the inner ring of the second magnet and the second coil; at least one of the first magnet and the second magnet is of an integrated structure, and when the first equipment wirelessly charges the second equipment through the first coil and the second coil, the first magnet and the second magnet are attracted to enable the first coil and the second coil to be aligned.

On the one hand, the annular magnet in the transmitting end and/or the receiving end is integrally formed, the sealing performance of the magnetic field is better, the magnetic leakage phenomenon can be reduced, and the magnetic attraction between the transmitting end and the receiving end is improved, so that the position alignment of the wireless charging coupling coil can be realized more accurately, and the wireless charging efficiency is improved. On the other hand, the integrated annular magnet is arranged on the periphery of the coil, so that a tight and closed magnetic force line can be formed, the internal magnetic field of the wireless charging coil cannot be greatly influenced, and the wireless charging efficiency can be improved.

With reference to the third aspect, in one possible implementation manner, the material of the first magnet and/or the second magnet is a permanent magnetic material.

With reference to the third aspect, in one possible implementation manner, the material of the first magnet and/or the second magnet includes at least one of the following permanent magnetic materials: bonded NdFeB, bonded ferrite, samarium cobalt, aluminum nickel cobalt, sintered ferrite and sintered NdFeB.

With reference to the third aspect, in one possible implementation manner, a material of one of the first magnet and the second magnet is a permanent magnetic material, and a material of the other of the first magnet and the second magnet is a soft magnetic material, where the soft magnetic material includes at least one of the following materials: iron, iron nickel, iron silicon, amorphous, nanocrystalline.

With reference to the third aspect, in one possible implementation manner, the thickness of the first magnet is greater than or equal to 0.2 mm and less than or equal to 5 mm.

With reference to the third aspect, in one possible implementation manner, the thickness of the second magnet is greater than or equal to 0.2 mm and less than or equal to 1 mm.

With reference to the third aspect, in one possible implementation manner, an absolute value of a difference between the thickness of the first magnet and the thickness of the second magnet is greater than or equal to 0.2 times the thickness of the second magnet and less than or equal to 4 times the thickness of the second magnet.

The thickness difference of the two magnets is small, the magnetic saturation degree of the two magnets is close, and the waste of the magnet volume caused by the large thickness difference of the two magnets is avoided.

With reference to the third aspect, in one possible implementation manner, the magnetizing manners of the first magnet and the second magnet are axial magnetizing, and when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is the same as the magnetizing direction of the second magnet; or the magnetizing modes of the first magnet and the second magnet are radial magnetizing, and when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is opposite to or the same as the magnetizing direction of the second magnet.

For example, when the magnetizing modes of the first magnet and the second magnet are radial magnetizing, if the projection of the first magnet in the axial direction overlaps with the projection of the second magnet in the axial direction, when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is opposite to the magnetizing direction of the second magnet. If the projection of the first magnet in the axial direction is not overlapped with the projection of the second magnet in the axial direction, if the first magnet is positioned on the mobile phone and the second magnet is positioned on the watch, when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is the same as the magnetizing direction of the second magnet.

With reference to the third aspect, in one possible implementation manner, the number of magnetization stages of the first magnet is greater than or equal to 1 and less than or equal to 8, and the number of magnetization stages of the second magnet is greater than or equal to 1 and less than or equal to 8, where the number of magnetization stages of the first magnet is the same as the number of magnetization stages of the second magnet.

With reference to the third aspect, in one possible implementation manner, the magnetizing steps of the first magnet and the second magnet are greater than or equal to 2, and the wireless charging system further includes: the third device comprises a third coil and a third magnet, wherein the third magnet is annular, an inner ring of the third magnet surrounds the third coil, a gap is reserved between the inner ring of the third magnet and the third coil, and the magnetizing level of the third magnet, the magnetizing level of the second magnet and the magnetizing level of the first magnet are the same; when the second device is in wireless charging for the third device through the second coil and the third coil, the second magnet is attracted with the third magnet, so that the second coil and the third coil are aligned.

The second device can be used as a receiving end to receive the power transmitted by the first device, and can also be used as a transmitting end to transmit the power to the third device, and the multipolar magnetizing mode of the second magnet can realize the attraction of the second device with the first device under the condition of receiving the power and the attraction of the second device with the third device under the condition of transmitting the power.

With reference to the third aspect, in one possible implementation manner, when the first device performs wireless charging for the second device, the first magnet is attracted to the second magnet, and an included angle between the first device and the second device is a first angle; when the first equipment carries out wireless charging on the third equipment, the first magnet is attracted with the third magnet, and an included angle between the first equipment and the third equipment is a first angle; when the second device is used for wirelessly charging the third device, the second magnet is attracted with the third magnet, an included angle between the second device and the third device is a second angle, wherein the difference between the second angle and the first angle is an odd multiple of 360 degrees/N, and N is the magnetizing stage number of the second magnet.

When the second device is used for wireless reverse charging, the second device and the third device can be positioned by rotating (360 degrees/magnetizing stage number) by odd times, so that the magnetic attraction alignment between the receiving ends is realized to support the wireless reverse charging of the receiving ends.

With reference to the third aspect, in one possible implementation manner, the first device is a vehicle, and the second device and the third device are portable electronic devices.

With reference to the third aspect, in one possible implementation manner, the first wireless charging module is disposed at least one of a console, a seat back, a door inner armrest, a center armrest, a door inner trim, and a trunk of the vehicle.

With reference to the third aspect, in one possible implementation manner, the first wireless charging module is fixedly installed in the vehicle as a front mount.

With reference to the third aspect, in one possible implementation manner, the first wireless charging module is installed in the vehicle through a detachable connection structure.

With reference to the third aspect, in one possible implementation manner, the first wireless charging module includes a first housing, and the first coil and the first magnet are accommodated in a first accommodating space formed by the first housing; the second wireless charging module comprises a second shell, and a second coil and a second magnet are accommodated in a second accommodating space formed by the second shell; the first casing is provided with first connecting portion, and the second casing is provided with second connecting portion, and first casing and second casing pass through first connecting portion and second connecting portion joint.

Through the joint of first casing and second casing, can make the laminating that first equipment and second equipment are more stable together.

The advantages of the apparatus according to the second aspect to the third aspect may refer to the first aspect, and are not repeated for brevity.

Drawings

Fig. 1 is a schematic diagram of a wireless charging system to which the present application is applicable.

Fig. 2 is a schematic diagram of several wireless reverse charging scenarios provided in embodiments of the present application.

Fig. 3 is a schematic diagram of a wireless charging principle applicable to the present application.

Fig. 4 is a schematic structural diagram of a wireless charging module provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of a monopole magnetizing method according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a multipole magnetizing method according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a wireless charging module according to an embodiment of the present application.

Fig. 8 is a schematic diagram of a wireless charging system according to an embodiment of the present application.

Fig. 9 is a schematic diagram of radial magnetization of a magnet provided in an embodiment of the present application.

Fig. 10 is an axial magnetization schematic of a magnet provided in an embodiment of the present application.

Fig. 11 is a schematic diagram of magnetic attraction positioning for wireless reverse charging by radial multipole magnetization according to an embodiment of the present application.

Fig. 12 is a schematic diagram of magnetic attraction positioning for wireless reverse charging by axial multipolar magnetization according to an embodiment of the present application.

Fig. 13 is a schematic diagram of a wireless charging module applied to a vehicle according to an embodiment of the present application.

Fig. 14 is an assembly schematic diagram of a wireless charging module and a detachable connection structure according to an embodiment of the present application.

Fig. 15 is a schematic structural diagram of a wireless charging module provided in an embodiment of the present application.

Fig. 16 is a schematic flow chart of triggering an automatic connect event based on magnetic strength provided by an embodiment of the present application.

Fig. 17 is a schematic block diagram of a wireless charging system according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

It should be noted that, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone.

In the present embodiments, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In addition, in the description of the embodiments of the present application, "plurality" means two or more, and "at least one" and "one or more" mean one, two or more. The singular expressions "a," "an," "the," and "such" are intended to include, for example, also "one or more" such expressions, unless the context clearly indicates to the contrary.

Reference in the 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 application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In the description of the embodiments of the present application, the terms "upper," "lower," "left," "right," "inner," "outer," "vertical," "horizontal," and the like indicate an orientation or positional relationship defined with respect to the orientation or position in which the components in the drawings are schematically placed, and it should be understood that these directional terms are relative concepts used for relative description and clarity, rather than indicating or implying that the apparatus or component in question must have a particular orientation, or be constructed and operated in a particular orientation, which may vary accordingly with respect to the orientation in which the components in the drawings are placed, and thus should not be construed as limiting the present application. Furthermore, reference to "perpendicular" in this application is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but is within the tolerance of the error.

In the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings by way of example, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable. In addition, the various components in the drawings are not to scale, and the dimensions and sizes of the components shown in the drawings are merely exemplary and should not be construed as limiting the application.

For ease of understanding, the technical terms referred to in the present application are explained and illustrated below.

Wireless charging refers to a technology that a device uses electromagnetic wave induction principle, electromagnetic wave resonance principle or other technology using a magnetic field as a transmission power bridge without using an electric wire, and uses corresponding equipment to transmit and receive at a transmitting end and a receiving end to generate an alternating current signal for charging.

Electromagnetic induction type wireless charging is a technology for realizing wireless charging by utilizing the principle that alternating current with a certain frequency of a primary coil generates a certain current in a secondary coil through electromagnetic induction, so that energy is transferred from a transmitting end to a receiving end.

A magnet refers to a substance or material capable of generating a magnetic field or an object having magnetic properties. The magnets have two polarities, and any magnet has two magnetic poles, namely a magnetic north pole N (also known as N pole) and a magnetic south pole S (also known as S pole). The magnetic strength of each part of the magnet is different, and the magnetic pole is the part with the strongest magnetism on the magnet. The magnetic poles have interaction, and the same-name magnetic poles repel and the different-name magnetic poles attract. The magnets are generally classified into permanent magnets and soft magnets.

The permanent magnet means a magnet capable of maintaining its magnetism for a long period of time. The permanent magnet is a hard magnet, is not easy to lose magnetism and is not easy to be magnetized.

Permanent magnet materials, which are materials that are difficult to magnetize and to demagnetize once magnetized, are mainly characterized by having a high coercivity (typically greater than 1000 amperes/meter (a/m)).

The soft magnetic body is a magnetic body which is easy to magnetize and easy to disappear after being magnetized, and the magnetism cannot be kept for a long time.

Soft magnetic material, which means a magnetic material having a low coercivity (less than 1000A/m, typically less than 100A/m) and a high permeability, is mainly characterized by easy magnetization and easy demagnetization, and can achieve maximum magnetization with a minimum external magnetic field.

Coercivity (coercive force) refers to the magnetic field strength at which a magnetic material is magnetized and then demagnetized to reduce its remanence (remanent flux density or remanent magnetization) to zero. The coercive force is also referred to as coercive field and is denoted by the symbol Hc. The remanence of the soft magnet is usually small or very small, and the remanence of the permanent magnet is large, so that the coercive force of the permanent magnet is larger than that of the soft magnet.

Demagnetizing refers to a process in which a magnetic field (referred to as a magnetization field) is applied to magnetize a magnetic material, and then a magnetic field having a direction opposite to that of the magnetization field is applied to reduce the magnetic properties.

Magnetizing refers to the process of magnetizing a magnetic substance or increasing the magnetism of a magnet with insufficient magnetism to reach a technical saturation state. The magnetizable objects to be magnetized are typically placed in a magnetic field formed by a coil through which a direct current passes.

For square magnets, the magnetizing direction can be divided into thickness magnetizing, length magnetizing and width magnetizing. The thickness magnetization is that the two ends (namely the maximum area) of the magnet in the thickness direction have magnetism; the length magnetization is that the two ends of the magnet in the length direction are magnetized; the width magnetization is that the magnet has magnetism at both ends in the width direction. Length magnetization and width magnetization may also be collectively referred to as side magnetization.

For cylindrical magnets or ring magnets, the magnetizing direction can be divided into radial magnetizing and axial magnetizing. Radial magnetization is the magnetization of the magnet at both ends in the diameter direction, and axial magnetization is the magnetization of the magnet at both ends perpendicular to the diameter direction (i.e., the length direction or the thickness direction). In addition, the magnetizing direction of the ring magnet may also include radiation magnetizing, specifically, magnetizing on the inner diameter side and the outer diameter side of the ring, for example, outer N inner S or outer S inner N.

Monopole magnetizing means that the magnet presents an N pole and an S pole on a plane after magnetizing.

Multipole magnetizing means that the magnet exhibits a plurality of N poles and a plurality of S poles on one plane after magnetizing.

Fig. 1 shows a schematic diagram of a wireless charging system to which the present application is applicable.

As shown in fig. 1, the wireless charging system 100 may include a wireless charging transmitting device 110 and a wireless charging receiving device 120, where energy transfer between the wireless charging transmitting device 110 and the wireless charging receiving device 120 may be achieved by way of energy coupling. More specifically, the wireless charging transmitting device 110 may use the principle of electromagnetic induction as an energy source to charge the wireless charging receiving device 120.

In some embodiments, the wireless charging transmitting device 110 as a power supply device may also be referred to as a transmitting end, and the wireless charging receiving device 120 as a power receiving device may also be referred to as a receiving end.

In this embodiment, the wireless charging transmitting device 110 or the wireless charging receiving device 120 may be, for example, a smart phone, a smart watch, a smart bracelet, a stylus, an earphone, a charging box, a tablet computer, an electronic reader, a notebook computer, a camera, a vehicle-mounted device, a wireless charger, a mobile charger (also referred to as a mobile power source or a mobile power source), a wearable device (such as smart glasses, smart jewelry, etc.), a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a smart home device (such as a smart screen, a smart television), or a vehicle, etc. with a wireless charging function.

By way of example and not limitation, wireless charging transmitting device 110 is a charging dock and wireless charging receiving device 120 is a cell phone; alternatively, the wireless charging transmitting device 110 is a charging box, and the wireless charging receiving device 120 is a wireless earphone; alternatively, the wireless charging transmitting device 110 is a smart phone, and the wireless charging receiving device 120 is a smart watch; alternatively, wireless charging transmitting device 110 is a vehicle and wireless charging receiving device 120 is a portable electronic device such as a cell phone, tablet computer, or the like.

In some embodiments, the wireless charging system 100 may further include a charger 130, the charger 130 being coupled to the wireless charging transmitting device 110. The charger 130 may be used to receive the mains supply and convert the mains supply into direct current for output into the wireless charging transmitting device 110, or the charger 130 may be used to directly output the received alternating current mains supply into the wireless charging transmitting device 110. The wireless charging transmitting device 110 is used for converting received electric energy into electromagnetic signals and transmitting the electromagnetic signals to the outside. The wireless charging receiving device 120 is configured to receive an electromagnetic signal and convert the electromagnetic signal into electric energy, thereby realizing wireless charging.

In some embodiments, the wireless charging system 100 may further include an energy device 140, such as a battery, and the wireless charging transmitting apparatus 110 may be directly connected to the energy device 140 to receive as input a direct current or an alternating current provided by the energy device 140.

In some embodiments, the wireless charging receiving device 120 may also be used as an energy source to charge other devices supporting wireless charging, for example, a mobile phone with a wireless charging function may be used to charge devices such as a headset, a watch, or other mobile phones supporting wireless charging. That is, the wireless charging receiving device 120 may receive the power provided by the wireless charging transmitting device 110, or may be used as a wireless charging transmitting device to charge other wireless charging receiving devices, i.e. support the wireless reverse charging function. Unlike the power supply mode of the wireless charging base, the wireless reverse charging energy mainly depends on the battery of the device, and the charging power is relatively small.

It should be noted that, the "device has a wireless charging function" or the like referred to in this application may be understood as the device having a capability of transmitting power to other devices in a wireless manner and/or the device having a capability of receiving power transmitted from other devices in a wireless manner. That is, the device may be a transmitting end, and may be a receiving end.

It should be noted that, the "device has a wireless reverse charging function" or the like, which is referred to in this application, is understood to be that the device has the capability of receiving power transmitted by other devices in a wireless manner and has the capability of transmitting power to other devices in a wireless manner.

Fig. 2 shows a schematic diagram of several wireless reverse charging scenarios provided in embodiments of the present application. It will be appreciated that embodiments of the present application are not limited to a particular form of wireless reverse charging scenario, and that the wireless reverse charging scenario presented in fig. 2 is merely a few examples given for ease of understanding.

As shown in fig. 2 (a), the wireless reverse charging scenario may include a cell phone 121 and a watch 151. The mobile phone 121 may be used as a receiving end to receive the electric energy in the wireless charging process, or may be used as a transmitting end to perform wireless reverse charging on the watch 151 after the wireless reverse charging function is started, where the watch 151 is a receiving end in the wireless reverse charging process.

As shown in fig. 2 (b), the wireless reverse charging scenario may include the cell phone 122 and the headset charging box 152. The mobile phone 122 may be used as a receiving end to receive the electric energy in the wireless charging process, or may be used as a transmitting end to perform wireless reverse charging on the earphone charging box 152 after the wireless reverse charging function is started, where the earphone charging box 152 is the receiving end in the wireless reverse charging process.

As shown in fig. 2 (c), the wireless reverse charging scenario may include a first mobile phone 123 and a second mobile phone 153. The first mobile phone 123 may be used as a receiving end to receive electric energy in a wireless charging process, or may be used as a transmitting end to perform wireless reverse charging on the second mobile phone 153 after the wireless reverse charging function is started, where the second mobile phone 153 is a receiving end in the wireless reverse charging process.

As shown in fig. 2 (d), the wireless reverse charging scenario may include a tablet 124 and a stylus 154. The tablet computer 124 may be used as a receiving end to receive the electric energy of the wireless charging process, or may be used as a transmitting end to perform wireless reverse charging on the handwriting pen 154 after the wireless reverse charging function is started, where the handwriting pen 154 is the receiving end in the wireless reverse charging process.

In fig. 2 (a) to (d), the wristwatch 151, the earphone charging case 152, the second mobile phone 153, and the stylus 154 may not have the wireless reverse charging function, or may not be turned on for the moment.

It should be understood that embodiments of the present application are not limited to a particular type of device in a wireless reverse charging scenario. For example, the power supply device (i.e., an electronic device that turns on a wireless reverse charging function and wirelessly charges other devices) may be a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, or the like. The power receiving device (i.e., the electronic device that is wirelessly charged by the power supply device) may be, for example, a portable electronic device such as a mobile phone, a bracelet, a wristwatch, an earphone, a keyboard, a stylus pen, an electric toothbrush, or the like.

In addition, it is understood that the wireless reverse charging scenario is one of the wireless charging scenarios. Accordingly, (a) to (d) in fig. 2 are actually one specific example of the wireless charging system 100, respectively, the mobile phone 121, the mobile phone 122, the first mobile phone 123, and the tablet computer 124 are one specific example of the wireless charging transmitting device 110 shown in fig. 1, and the wristwatch 151, the earphone charging case 152, the second mobile phone 153, and the stylus 154 are one specific example of the wireless charging receiving device 120 shown in fig. 1, respectively.

Fig. 3 shows a schematic diagram of the wireless charging principle. As shown in fig. 3, in the wireless charging scenario, a transmitting end 210 (i.e., a power supply device) and a receiving end 220 (i.e., a power receiving device) are involved, where both the transmitting end 210 and the receiving end 220 have a wireless charging capability, so as to implement a wireless charging procedure of the transmitting end 210 to the receiving end 220.

The transmitting end 210 may include a first coil 211, a first chip 212, and a first battery 213, and the receiving end 220 may include a second coil 221, a second chip 222, and a second battery 223. The first coil 211 and the second coil 221 are used to achieve energy coupling. The first chip 212 and the second chip 222 are used to implement wireless charging control or management. The first battery 213 and the second battery 223 are used to store electrical energy.

After the wireless charging area of the transmitting end 210 is aligned with the wireless charging area of the receiving end 220, the transmitting end 210 can wirelessly charge the receiving end 220. Specifically, during the wireless charging process, the transmitting end 210 may control the first battery 213 to output current to the first coil 211 (i.e., the power output coil) through the first chip 212, so that the first coil 211 may transmit a high-frequency magnetic field, i.e., convert an electrical signal into a magnetic signal. The high frequency magnetic field may pass through the second coil 221 (i.e., the power receiving coil) such that an induced current is generated on the second coil 221, i.e., a magnetic signal is converted into an electrical signal. The second chip 222 may detect the induced current and input the induced current to the second battery 223.

In some embodiments, the first chip 212 may include a transformation module for performing voltage conversion and a transmitting circuit for converting direct current into alternating current signals. Accordingly, the first coil 211 is used to convert an alternating current signal into a magnetic signal and transmit.

In some embodiments, the second chip 222 may include a transformation module and a receiving circuit. The second coil 221 is used for converting a magnetic signal into an alternating current signal, the receiving circuit is used for converting the alternating current signal into direct current, and the voltage transformation module is used for realizing voltage transformation.

Wireless charging equipment is favored by more and more users because of invisible charging, low equipment wear rate, high technical content, convenient operation and the like. To attract customers, more and more manufacturers are put into the development of wireless charging devices, and various devices supporting wireless charging are being introduced, such as mobile phones, bracelets, watches, and other portable devices having wireless charging functions, and the like.

With the wide application of wireless charging technology, users also put higher demands on wireless charging devices, in particular, the charging efficiency of the wireless charging devices. Whether the coil is aligned in position or not when the transmitting end and the receiving end are coupled for charging is a key factor affecting wireless charging efficiency. Currently, magnetic positioning technology is generally used to achieve the position alignment of the transmitting end coil and the receiving end coil, for example, a small magnet array is arranged outside the coil, and the attraction force between the magnets is used to achieve the matching of the positions of the coils. However, the current magnetic positioning technology still has the problem of inaccurate positioning, which results in low charging efficiency and influences user experience.

In view of this, the embodiment of the application provides a wireless module that charges, can improve the positioning accuracy of coil when transmitting terminal and receiving terminal coupling charge to improve wireless charging efficiency.

Fig. 4 shows a schematic block diagram of a wireless charging module according to an embodiment of the present application. Where (a) in fig. 4 is a schematic top view of the wireless charging module 300, and (b) in fig. 4 shows a partial schematic perspective view of the wireless charging module 300.

As shown in fig. 4 (a) and (b), the wireless charging module 300 includes a ring magnet 310 and a coil 320, and the coil 320 is located inside the ring magnet 310, that is, the ring magnet 310 is disposed at the periphery of the coil 320, or the inner ring of the ring magnet 310 surrounds the coil 320. In the present embodiment, the ring magnet 310 is a unitary structure. In other words, the ring magnet 310 is integrally formed. There is a gap between the inner ring of the ring magnet 310 and the coil 320. More specifically, there is a gap between the inner ring of ring magnet 320 and the side of coil 320 that is adjacent to ring magnet 320.

The wireless charging module 300 provided in the embodiment of the application may be applied to a transmitting end and/or a receiving end. On the one hand, because the annular magnet that the coil periphery set up is integrated into one piece, compare little magnet array, reduce the magnetic leakage phenomenon, the closure of magnetic field is better, can improve the magnetic attraction between transmitting end and the receiving end, can realize the position alignment of wireless coupling coil that charges like this more accurately to improve wireless charging efficiency. On the other hand, the integrated annular magnet is arranged on the periphery of the coil, so that a tight and closed magnetic force line can be formed, the internal magnetic field of the wireless charging coil cannot be greatly influenced, and the wireless charging efficiency can be improved.

In addition, the leakage magnetic field of the integrated annular magnet is small (namely, the leakage magnetic field is small), and the distance between the magnet and the coil (specifically, the distance between the inner ring of the magnet and the outer ring of the coil in the radial direction of the magnet) can be reduced on the premise that the wireless charging coil is not affected, so that:

1) The coil with larger diameter can be placed in the area formed by the magnet inner ring, the larger the diameter of the coil is, the larger the induced current is, and the wireless charging capability can be improved; or alternatively, the process may be performed,

2) The outer diameter and the inner diameter of the magnet can be unchanged, so that the volume of the magnet is increased, the larger the volume of the magnet is, the stronger the magnetic force is, the position alignment of the wireless charging coupling coil can be realized more accurately, and the wireless charging efficiency is improved; or alternatively, the process may be performed,

3) The outer diameter and the inner diameter of the magnet can be reduced, so that the volume of the magnet is reduced, and the radial size of the wireless charging module can be correspondingly reduced, so that the space occupied by the wireless charging module is saved, and the wireless charging module is convenient to realize the miniaturization of the wireless charging equipment when the wireless charging module is applied to the equipment; or alternatively, the process may be performed,

4) The magnetic body has the advantages that the outer diameter of the magnetic body is unchanged, the inner diameter of the magnetic body is reduced, the thickness (or axial dimension) of the wireless charging module can be reduced on the premise of ensuring magnetic attraction, so that the space occupied by the wireless charging module is saved, and when the magnetic body is applied to equipment, the magnetic body is convenient to realize the light and thin of the wireless charging equipment.

Of course, because the integrated annular magnet has less magnetic leakage and better magnetic field sealing performance, under the condition of not changing the radial size of the magnet, if the magnetic attraction of the magnet reaches a certain value, the thickness of the integrated annular magnet provided by the embodiment of the application is much thinner than that of a small magnet array. Therefore, the position alignment of the wireless charging coupling coil can be accurately realized, the wireless charging efficiency is improved, the occupied space of the wireless charging module when applied to equipment can be saved, and the wireless charging equipment is light and thin.

In addition, the integrated annular magnet is convenient to process and assemble, can improve the processing efficiency and the installation efficiency, and is beneficial to reducing the cost.

In some embodiments, the ring magnet 310 is made of a permanent magnetic material (or hard magnetic material) or a soft magnetic material.

When the ring-shaped magnet 310 is made of a permanent magnetic material, the wireless charging module 300 can be applied to a transmitting end, such as a charging base, a vehicle-mounted device, a mobile charger, and other devices which do not need to be carried around anytime and anywhere or cannot be used anytime or have low use frequency. Thus, when the user uses different receiving ends, for example, the positioning magnets in the receiving ends are all made of soft magnetic materials, wireless charging can be performed through the same transmitting end. In addition, the user will not generally carry the transmitting end with him, so that adverse effects of the ring magnet 310 in the transmitting end on the magnetic stripe in the bank card or on the magnetic sensor such as digital compass, magnetometer, etc. in the electronic product can be avoided.

When the ring magnet 310 is made of soft magnetic material, the wireless charging module 300 can be applied to a receiving end, such as a mobile phone, a tablet computer, a watch, a bracelet, and other portable devices with high use frequency, so that adverse effects of the ring magnet 310 in the receiving end on magnetic stripes in a bank card or magnetic sensors in an electronic product such as a digital compass and a magnetometer can be avoided.

It is understood that when the ring magnet 310 is made of a permanent magnetic material, the wireless charging module 300 can also be applied to the receiving end. When the ring-shaped magnet 310 is made of soft magnetic material, the wireless charging module 300 can also be applied to the transmitting end. The embodiments of the present application are not limited in this regard.

In some embodiments, when the ring magnet 310 is made of a permanent magnetic material, it may be any of the following materials:

1) Aluminum nickel cobalt permanent magnet alloy material: the magnetic iron alloy takes iron, nickel and aluminum as main components, also contains copper, cobalt, titanium and other elements, has high remanence and low temperature coefficient, and has stable magnetism;

2) Iron-chromium-cobalt permanent magnet alloy material: the alloy takes iron, chromium and cobalt as main components, also contains molybdenum and a small amount of titanium and silicon, has good processability and can be subjected to cold-hot plastic deformation;

3) Ferrite permanent magnet material: mainly comprises barium ferrite and strontium ferrite, has high resistivity and large coercive force, does not contain noble metals such as nickel, cobalt and the like, and has rich sources of raw materials;

4) Rare earth permanent magnet material: the permanent magnet material mainly comprises a rare earth cobalt permanent magnet material and a neodymium iron boron (NdFeB) permanent magnet material, wherein the former has low temperature coefficient, stable magnetism and high coercive force, and the latter has higher remanence, coercive force and maximum magnetic energy product than the former, is not fragile and has better mechanical property;

5) Composite material: the permanent magnetic powder is compounded with plastic material as binder, and has high deformation resistance, high size precision, high mechanical performance, high homogeneity of the performance of the magnet parts and easy radial orientation and multipolar magnetizing.

By way of example, the permanent magnet material used for the ring magnet 310 may include at least one of bonded NdFeB, bonded ferrite, samarium cobalt (SmCo), alNiCo (AlNiCo), sintered ferrite, sintered NdFeB.

The bonded NdFeB is a permanent magnet material formed by uniformly mixing NdFeB powder with a binder such as resin, plastic or low-melting-point metal, and can be manufactured into composite NdFeB permanent magnets with various complex shapes by compression, extrusion or injection molding. Since the bonded NdFeB contains a certain proportion of binder, the ring magnet 310 made of the permanent magnet material has certain flexibility, and even if the thickness of the magnet is very thin, the magnet cannot crack, and the magnetic performance of the magnet is not affected after deformation.

The bonded ferrite is a composite permanent magnet material formed by mixing ferrite powder with rubber or plastic, and can be manufactured into various high-precision permanent magnets with complex shapes by methods such as compression molding or injection molding. Since the bonded ferrite contains a certain proportion of binder, the ring magnet 310 made of the permanent magnet material has a certain flexibility, and even if the thickness of the magnet is very thin, the magnet will not crack, and the magnetic performance of the magnet will not be affected after deformation.

The sintered NdFeB permanent magnet can be manufactured by a powder metallurgy process, and the annular magnet 310 made of the permanent magnet material has high coercive force, extremely high magnetic property and good mechanical property, and can be cut and processed into different shapes and drilled holes.

The sintered ferrite permanent magnet can be manufactured by a ceramic process, and the annular magnet 310 made of the permanent magnet material has low price, moderate magnetic performance and wide application.

The samarium cobalt permanent magnet material has high magnetic energy product, extremely low temperature coefficient, and strong corrosion resistance and oxidation resistance.

The alnico permanent magnetic material has higher magnetic flux density and stable temperature performance, and is easy to mold.

In some embodiments, when the ring magnet 310 is made of soft magnetic material, it may be any of the following materials:

1) Pure iron and low carbon steel: the saturated magnetization intensity is high, the price is low, and the processing performance is good;

2) Iron-silicon alloy material: after adding silicon into pure iron, the phenomenon that the magnetism of the magnetic material changes along with the service time can be eliminated;

3) Iron-aluminum alloy material: the magnetic material has better soft magnetic performance, high magnetic conductivity and resistivity, high hardness and good wear resistance;

4) Iron-silicon-aluminum alloy material: the hardness, the saturation induction intensity, the magnetic permeability and the resistivity are all higher;

5) Nickel-iron alloy material: the magnetic performance can be controlled by the proportion of alloying elements and proper process, and soft magnetic materials such as high magnetic permeability, constant magnetic permeability, rectangular magnetic property and the like are obtained;

6) Iron-cobalt alloy material: the magnetic material has higher saturation magnetization intensity and low resistivity;

7) Soft magnetic ferrite: belongs to a non-metal ferrimagnetic soft magnetic material, has high resistivity, lower saturation magnetization than metal and low price;

8) Amorphous soft magnetic alloy material: the magnetic core is also called metallic glass or amorphous metal, has high magnetic conductivity and resistivity, small coercive force, is insensitive to stress, does not have magnetocrystalline anisotropy caused by a crystal structure, and has the characteristics of corrosion resistance, high strength and the like;

9) Ultracrystalline soft magnetic alloy material: the magnetic core is generally composed of a crystal phase smaller than about 50 nanometers and an amorphous grain boundary phase, also called nanocrystalline, and has the characteristics of high magnetic permeability, low coercivity, small iron loss, high saturation induction and good stability.

Illustratively, the soft magnetic material employed by the ring magnet 310 may include at least one of iron (Fe), iron nickel (FeNi), iron silicon (FeSi), amorphous, nanocrystalline.

The ring magnet 310 made of the above soft magnetic materials has a certain flexibility, is easy to process, and has low cost. In addition, when the material of the ring magnet 310 includes iron or iron-nickel, a larger magnetic force can be provided in the case where the thickness of the ring magnet 310 is thin.

In the embodiment of the present application, the ring-shaped magnet 310 is annular, that is, a hollow closed shape, and the ring-shaped magnet 310 may be, for example, a circular ring, a square ring, an elliptical ring, a triangular ring, or the like, and the specific shape of the ring-shaped magnet 310 is not limited in the embodiment of the present application. In practical applications, the shape of the ring magnet 310 may be set according to practical requirements. For ease of understanding, the embodiments provided herein are described with the ring magnet 310 being annular in shape, but it is understood that the application is not so limited.

In some embodiments, ring magnet 310 may be magnetized in a single pole or multiple poles.

Fig. 5 shows a schematic diagram of a monopole magnetizing method according to an embodiment of the present application. Taking the annular ring shape of the ring magnet 310 as an example, as shown in (a) of fig. 5, the magnetizing direction of the ring magnet 310 may be radial magnetizing, such as left N, right S, or left S, right N; as shown in (b) of fig. 5, the magnetizing direction of the ring magnet 310 may be axial magnetizing, such as upper N lower S or upper S lower N; as shown in fig. 5 (c), the ring magnet 310 may be magnetized in a radial direction, such as inside N outside S or inside S outside N.

Since radial magnetization is also along the diameter of ring magnet 310, radial magnetization may also be considered a way of radial magnetization in embodiments of the present application.

Fig. 6 shows a schematic diagram of a multipole magnetizing method according to an embodiment of the present application. Taking the annular ring shape of the ring magnet 310 as an example, as shown in a perspective view and a top view of the ring magnet in fig. 6 (a), the magnetizing direction of the ring magnet 310 may be radial multipolar magnetizing, i.e. outer circumference and inner Zhou Duoji magnetizing; as shown in fig. 6 (b), the ring magnet 310 may be magnetized in axial multipole direction, i.e., multipole magnetization in the thickness direction of the ring magnet.

In some embodiments, when the ring magnet 310 is charged in a multipole manner, the number of charging steps is greater than or equal to 2.

In some embodiments, when the ring magnet 310 is multi-pole charged, the number of charging steps is less than or equal to 8.

Illustratively, the number of magnetizing steps of the ring magnet 310 may be even, such as 2, 4, 6, or 8, etc.

In this embodiment, if the number of magnetizing steps of the ring magnet 310 is smaller, for example, 2 or 4, the positions between the transmitting end and the receiving end for positioning are smaller, and the combination of the transmitting end and the receiving end can be more regular, so that the charging process is more beautiful. If the number of magnetizing steps of the ring magnet 310 is large, for example, 6 or 8, the number of positions between the transmitting end and the receiving end for positioning is large, and the user can select more positioning positions, so that the operation of the user can be facilitated.

In some embodiments, referring to fig. 5 and 6, the number of magnetization steps of ring magnet 310 is greater than or equal to 1 and less than or equal to 8. In the embodiment of the present application, the number of magnetizing steps of the ring magnet 310 is a positive integer.

In some embodiments, the thickness (i.e., the dimension in the axial direction) of the ring magnet 310 is greater than or equal to 0.2 millimeters and less than or equal to 5 millimeters.

In some embodiments, the thickness of the ring magnet 310 is greater than or equal to 0.2 millimeters and less than or equal to 1 millimeter.

Illustratively, when the wireless charging module including the ring magnet 310 is applied to a larger-sized device, such as a vehicle, a charging base, etc., the thickness of the ring magnet 310 may be designed to be larger, such as 0.5mm, 1mm, 2mm, 3mm, 4mm, etc., so that the space arrangement of the whole device may not be affected, and a larger-sized coil or a larger-sized magnet may be disposed in a sufficient space, thereby improving the charging capability or charging efficiency of the device, etc.

For example, when the wireless charging module including the ring magnet 310 is applied to a device having a small size, such as a mobile phone, a wristwatch, a tablet, etc., the thickness of the ring magnet 310 may be designed to be smaller, such as 0.3mm, 0.4mm, 0.5mm, etc., so that the trend of miniaturization and light-weighted devices can be adapted while the charging capability or charging efficiency of the device is ensured.

In some embodiments, the difference between the thickness of the annular magnet disposed at the transmitting end and the thickness of the annular magnet disposed at the receiving end is less than or equal to 5mm, such as 2mm, 3mm, 3.5mm, 4mm, etc. Therefore, the thickness difference of the two magnets is small, the magnetic saturation degree of the two magnets is close, and the waste of the magnet volume caused by the large thickness difference of the two magnets is avoided.

In some embodiments, the gap between the inner ring of the ring magnet 310 and the coil 320 (specifically, the face of the coil 320 proximate the ring magnet 310) is greater than 0 and less than or equal to 2 millimeters, such as a gap of 0.5mm, 1mm, 1.5mm, 1.8mm, etc. The smaller gap between the inner ring of the ring magnet 310 and the coil 320 is advantageous in saving space or increasing the coil diameter or increasing the magnet volume in a certain space to improve wireless charging capability or wireless charging efficiency.

In practical applications, the specific value of the gap between the inner ring of the ring magnet 310 and the coil 320 may be comprehensively determined according to the designed charging power and the designed charging efficiency, so as to meet the requirements of the charging power and the charging efficiency at the same time.

In some embodiments, as shown in fig. 7, the wireless charging module 300 may further include a magnetic conductive sheet 330, where the magnetic conductive sheet 330 is located in an inner ring region of the ring magnet 310 and is stacked with the coil 320 along an axial direction of the ring magnet 310. By arranging the magnetic conductive sheet 330, a channel with high magnetic permeability can be provided for the coupling of the electromagnetic induction coil 320, the magnetic flux is increased, the charging efficiency is improved, and the electromagnetic interference of the alternating magnetic field of the electromagnetic induction coil to other electronic components can be avoided, so that the shielding effect is achieved.

In some embodiments, the magnetic conducting sheet 330 is made of a soft magnetic material (e.g., a soft magnetic material of high magnetic permeability and low loss). For example, the magnetic conductive sheet 330 may be any of the following materials: pure iron, low carbon steel, iron-silicon alloy material, iron-aluminum alloy material, iron-silicon-aluminum alloy material, nickel-iron alloy material, iron-cobalt alloy material, soft magnetic ferrite, amorphous soft magnetic alloy material, and ultra-microcrystalline soft magnetic alloy material. By way of example and not limitation, the magnetic sheet 330 may employ at least one soft magnetic material of iron (Fe), iron nickel (FeNi), iron silicon (FeSi), amorphous, nanocrystalline.

Fig. 8 shows a schematic diagram of a wireless charging system according to an embodiment of the present application.

As shown in fig. 8, the wireless charging system 400 includes a transmitting end 401 (may also be referred to as a first device) and a receiving end 402 (may also be referred to as a second device), and the transmitting end 401 may wirelessly transmit power to the receiving end 402. The transmitting terminal 401 may be a specific example of the wireless charging transmitting device 110 shown in fig. 1, and the receiving terminal 402 may be a specific example of the wireless charging receiving device 120 shown in fig. 1.

The transmitting end 401 includes a first wireless charging module 410, the receiving end 402 includes a second wireless charging module 420, and the transmitting end 401 can wirelessly charge the receiving end 402 through the first wireless charging module 410 and the second wireless charging module 420. Here, the first wireless charging module 410 and/or the second wireless charging module 420 may be a specific example of the wireless charging module 300 described above.

Illustratively, the product types of the transmitting end 401 and the receiving end 402 may be different or the same. For example, the transmitting end 401 is a mobile charger or a charging base, and the receiving end 402 is a tablet, a mobile phone or a watch; for another example, the transmitting end 401 is a mobile phone or a tablet, and the receiving end 402 is a watch or a bracelet; for another example, the transmitting end 401 and the receiving end 402 are both mobile phones, both watches, both flat panels, both mobile chargers, etc. In some embodiments, when the transmitting end 401 or the receiving end 402 is a portable electronic device, such as a tablet, a mobile phone, a watch, etc., the first wireless charging module 410 or the second wireless charging module 402 may be disposed on a housing of the corresponding device.

With continued reference to fig. 8, the first wireless charging module 410 may include a first magnet 411 and a first coil 412, where the first magnet 411 is annular, the first coil 412 is located in an area surrounded by an inner ring of the first magnet 411, and a gap is formed between the inner ring of the first magnet 411 and the first coil 412. The second wireless charging module 420 may include a second magnet 421 and a second coil 422, where the second magnet 421 is in a ring shape, the second coil 422 is located in an area surrounded by an inner ring of the second magnet 421, and a gap is formed between the inner ring of the second magnet 421 and the second coil 422. For example, the first coil 412 and the second coil 422 may be circular or ring-shaped with a smaller diameter, and the first magnet 411 and the second magnet 421 are ring-shaped with a larger diameter. In the present embodiment, the first magnet 411 and the second magnet 421 are used for focusing of the transmitting end 401 and the receiving end 402.

In the embodiment of the present application, the first magnet 411 and/or the second magnet 421 are in an integral ring structure. That is, the first magnet 411 and/or the second magnet 421 are one specific example of the ring magnet 310 described above.

For example, the first magnet 411 and the second magnet 421 are both of an integral ring structure, so that the first magnet 411 may be the ring magnet 310 applied to the transmitting end 401 and the second magnet 421 may be the ring magnet 310 applied to the receiving end 402.

For another example, one of the first magnet 411 and the second magnet 421 is an integral ring structure, and the other is a magnet array, and the magnet array is a ring array.

When the space requirements of the devices for wireless charging, such as vehicles, wireless charging bases, etc., are relaxed, the magnets enclosed outside the coils may be arranged as an array of magnets. The material of the magnet can be sintered ferrite or sintered NdFeB, and compared with the bonded ferrite or bonded NdFeB, the material can provide larger magnetic force.

When the device for wireless charging, such as a mobile phone, a watch and the like, is used for setting the magnet surrounded by the coil into an integrated structure under the condition of strict space design requirements, and is favorable for realizing the light weight and the miniaturization of the device.

In the embodiment of the present application, the material of the first magnet 411 and/or the second magnet 421 is a permanent magnet material. This allows the transmitting end 401 and the receiving end 402 to be attracted together by magnetic force. Thereby realizing the alignment of the coil. In some embodiments, when one of the first magnet 411 and the second magnet 421 is made of a permanent magnetic material, the other is made of a soft magnetic material.

In some embodiments, the thickness of the second magnet 421 is greater than or equal to 0.2 millimeters and less than or equal to 1 millimeter, such as 0.3mm, 0.5mm, 0.7mm, 0.9mm, and the like. Therefore, the charging capacity or the charging efficiency of the receiving end can be ensured, and the device is suitable for the development trend of miniaturized and light and thin equipment.

In some embodiments, the thickness of the first magnet 411 is greater than or equal to 0.2 millimeters and less than or equal to 5 millimeters, such as 0.5mm, 1mm, 1.5mm, 2mm, 3mm, 4mm, and the like. Therefore, the space arrangement of the whole transmitting end is not affected, and a coil with a larger size or a magnet with a larger volume can be arranged in a sufficient space, so that the charging capacity or the charging efficiency of the device are improved.

In some embodiments, the absolute value of the difference between the thickness of the first magnet 411 and the thickness of the second magnet 421 is greater than or equal to 0.2 times the thickness of the second magnet 421 and less than or equal to 4 times the thickness of the second magnet 421. That is, assuming that the thickness of the second magnet 421 is t, the thickness of the first magnet 411 may range from 0.8t to 5t. For example, the thickness of the first magnet may range from t, 2t, 3t, 4t, and accordingly, the thickness of the first magnet 411 and the thickness of the second magnet 421 may be equal, or the absolute value of the difference between the thickness of the first magnet 411 and the thickness of the second magnet 421 may be 1, 2, or 3 times the thickness of the second magnet 421.

Therefore, the thickness difference of the two magnets is small, the magnetic saturation degree of the two magnets is close, and the waste of the magnet volume caused by the large thickness difference of the two magnets is avoided. In general, the magnet in the receiving end is limited by space, the thickness is generally smaller, the requirement of the emitting end on space arrangement is relatively loose, and the thickness of the magnet can be set more flexibly, so that in practical application, in order to make the magnetic saturation degrees of the magnet in the emitting end and the magnet in the receiving end close, the thickness of the magnet in the emitting end can be set according to the thickness of the magnet in the receiving end.

In the embodiment of the present application, the number of magnetizing poles of the first magnet 411 is the same as the number of magnetizing poles of the second magnet 421. In some embodiments, the number of magnetization stages of the first magnet 411 is greater than or equal to 1 and less than or equal to 8, and the number of magnetization stages of the second magnet 421 is greater than or equal to 1 and less than or equal to 8.

In this embodiment, the first magnet 411 and the second magnet 421 may be single-pole magnetization or multi-pole magnetization.

In some embodiments, if the magnetization directions (or magnetization modes) of the first magnet 411 and the second magnet 421 are axial magnetization, referring to fig. 9 (a), when the first magnet 411 and the second magnet 421 are magnetically attracted, the magnetization directions of the first magnet 411 and the second magnet 421 are the same. By way of example, (b) in fig. 9 illustrates a schematic distribution of magnetic lines in the case of axial magnetization by taking a cross section parallel to the planes of L1 and L2 and a cross section parallel to the planes of L3 and L4 as an example, respectively, it can be seen that a close loop is formed between the first magnet 411 and the second magnet 421, increasing the magnetic attraction between the first magnet 411 and the second magnet 421. In addition, the tightly closed loop has less magnetic leakage, and the influence on other components in the transmitting end 401 and the receiving end 402 is greatly reduced.

By way of example and not limitation, the device provided with the first magnet 411 and the device provided with the second magnet 421 are of the same type, such as a cell phone, tablet, watch, mobile charger, or the like. Typically, two identical types of equipment are closely sized, and accordingly, the size (e.g., inner and outer diameters) of the magnets each comprise is also closely sized. Therefore, the magnetizing modes of the two magnets are set to be axially magnetized and the magnetizing directions are the same, so that the magnetic attraction between the two devices can be realized.

In some embodiments, if the magnetizing directions (or magnetizing manners) of the first magnet 411 and the second magnet 421 are radial magnetizing, referring to fig. 10 (a) to (c), when the first magnet 411 and the second magnet 421 are magnetically attracted, the magnetizing directions of the first magnet 411 and the second magnet 421 are opposite or the same.

For example, (a) in fig. 10 shows a schematic diagram of the magnetizing directions of the first magnet 411 and the second magnet 421 in the case of being close in size. As shown in fig. 10 (a), the first magnet 411 and the second magnet 421 are disposed opposite to each other in the thickness direction (or axial direction) of the magnets, wherein the projection of the first magnet 411 in the thickness direction overlaps with the projection of the second magnet 421 in the thickness direction. For example, the inner diameter of the first magnet 411 is smaller than or equal to the inner diameter of the second magnet 421 and the outer diameter of the first magnet 411 is larger than the inner diameter of the second magnet 421, or the inner diameter of the first magnet 411 is larger than the inner diameter of the second magnet 421 and smaller than the outer diameter of the second magnet 421, or the inner diameter of the second magnet 421 is smaller than or equal to the inner diameter of the first magnet 411 and the outer diameter of the second magnet 421 is larger than the inner diameter of the first magnet 411, or the inner diameter of the second magnet 421 is larger than the inner diameter of the first magnet 411 and smaller than the outer diameter of the first magnet 411. When the first magnet 411 and the second magnet 421 are magnetically attracted, as shown in (b) of fig. 10, the first magnet 411 and the second magnet 421 are attracted mainly by the end face of the first magnet 411 toward the second magnet 421 and the end face of the second magnet 421 toward the first magnet 411, and the magnetizing directions of the first magnet 411 and the second magnet 421 are opposite.

By way of example and not limitation, the device provided with the first magnet 411 and the device provided with the second magnet 421 are of the same type, such as a cell phone, tablet, watch, mobile charger, or the like. Typically, two identical types of equipment are closely sized, and accordingly, the size (e.g., inner and outer diameters) of the magnets each comprise is also closely sized. Therefore, the magnetizing modes of the two magnets are set to be radial magnetizing and the magnetizing directions are opposite, so that the magnetic attraction between the two devices can be realized.

As another example, (c) and (e) in fig. 10 show schematic views of magnetizing directions of the first magnet 411 and the second magnet 421 in the case where the size difference is large. As shown in (c) and (e) of fig. 10, the first magnet 411 and the second magnet 421 are disposed opposite to each other in the thickness direction (or axial direction) of the magnets, wherein the projection of the first magnet 411 in the thickness direction does not overlap with the projection of the second magnet 421 in the thickness direction. For example, as shown in fig. 10 (c), the inner diameter of the first magnet 411 is larger than or equal to the outer diameter of the second magnet 421, and the projection of the first magnet 411 in the thickness direction surrounds the projection of the second magnet 421 in the thickness direction. Or as shown in (e) of fig. 10, the inner diameter of the second magnet 421 is greater than or equal to the outer diameter of the first magnet 411, and the projection of the second magnet 421 in the thickness direction surrounds the projection of the first magnet 411 in the thickness direction. When the first magnet 411 is magnetically attracted to the second magnet 421, as shown in (d) of fig. 10, the first magnet 411 and the second magnet 421 are attracted mainly by the first magnet 411 toward the inner annular surface of the second magnet 421 and the second magnet 421 toward the outer annular surface of the first magnet 411, or as shown in (f) of fig. 10, the first magnet 411 and the second magnet 421 are attracted mainly by the first magnet 411 toward the outer annular surface of the second magnet 421 and the second magnet 421 toward the inner annular surface of the first magnet 411, and at this time, the magnetizing directions of the first magnet 411 and the second magnet 421 are the same.

By way of example and not limitation, the type of device provided with the first magnet 411 and the device provided with the second magnet 421 are different, such as one device being a cell phone, the other device being a watch (or wristband), or one device being a tablet, the other device being a cell phone (or watch, wristband), or one device being a cell phone charging cradle, the other device being a watch, etc. Typically, the dimensions of two different types of equipment differ significantly, and accordingly, the dimensions (e.g., inner and outer diameters) of the magnets that each includes also differ significantly. Therefore, the magnetizing modes of the two magnets are set to be radial magnetizing and the magnetizing directions are the same, so that the magnetic attraction between the two devices can be realized.

For example, fig. 10 (b), (d), and (f) show schematic magnetic force line distribution diagrams of the charging scene in the radial magnetizing condition shown in fig. 10 (a), (c), and (e), respectively, taking a cross section parallel to the planes of L1 and L2 and a cross section parallel to the planes of L3 and L4 as an example. It can be seen that a close loop is formed between the first magnet 411 and the second magnet 421, and the volume of the magnet that can be utilized is increased in a certain size space, thereby increasing the magnetic attraction between the first magnet 411 and the second magnet 421. In addition, the tightly closed loop has less magnetic leakage, and the influence on other components in the transmitting end 401 and the receiving end 402 is greatly reduced.

Here, taking the first magnet 411 and the second magnet 421 as 2-pole magnetization as an example, when the first magnet 411 or the second magnet 421 is cut along the plane in which L1 and L2 are located, the number of magnetization poles of at least one of the two portions in the separated state is 1. When the first magnet 411 or the second magnet 421 is cut along the plane in which L3 and L4 are located, the number of magnetizing poles of any one of the two parts in the separated state is 2.

In this embodiment, in order to realize wireless charging, the transmitting end and the receiving end are generally stacked, and accordingly, in a charged state, the first magnet 411 located in the transmitting end and the second magnet 421 located in the receiving end are also stacked or oppositely disposed. The axial direction of the first magnet 411 is parallel to the axial direction of the second magnet 421, or the thickness direction of the first magnet 411 is the same as the thickness direction of the second magnet 421. When the first magnet 411 and the second magnet 421 are magnetically attracted, specifically, the first magnet 411 and the second magnet 421 are magnetically attracted along the axial direction (or the thickness direction) of the magnets.

In addition, the radial direction in the present application is understood to be a direction perpendicular to the thickness direction. The outer diameter referred to above is understood to be the distance between two points at which a line perpendicular to the thickness direction of the ring magnet and passing through the center of the ring magnet intersects the outer annular surface of the ring magnet. The above-mentioned reference to the inner diameter is understood to be the distance between two points at which a line perpendicular to the thickness direction of the ring magnet and passing through the center of the ring magnet intersects the inner annular surface of the ring magnet.

In some embodiments, the first wireless charging module 410 includes a first housing, and the first coil 412 and the first magnet 411 may be accommodated in a first accommodating space formed by the first housing. The second wireless charging module 420 includes a second housing, and the second coil 422 and the second magnet 421 may be accommodated in a second accommodating space formed by the second housing. The first casing can set up first connecting portion, and the second casing can set up second connecting portion, and first casing and second casing can pass through first connecting portion and second connecting portion joint. In this way, the receiving end 401 and the transmitting end 402 can be more stably attached together in a clamping manner.

In some embodiments, the transmitting end 401 may also charge the receiving end 402 in a wired manner or a contact manner, where the first magnet 411 disposed in the transmitting end 401 and the second magnet 421 disposed in the receiving end 402 may play a role in magnetic attraction and fixation, that is, the transmitting end 401 and the receiving end 402 are fixed by magnetic attraction between the first magnet 411 and the second magnet 421, so that the position of the receiving end 402 relative to the transmitting end 401 is fixed, and charging is convenient. Of course, in other embodiments, the transmitting end 401 and the receiving end 402 may be charged only by a wired manner or a contact manner, so that the transmitting end 401 may include the first magnet 411 and not include the first coil 412, the receiving end 402 may include the second magnet 421 and not include the second coil 422, and similarly, the first magnet 411 disposed in the transmitting end 401 and the second magnet 421 disposed in the receiving end 402 may play a role of magnetic attraction and fixation, so as to facilitate charging.

In some embodiments, if the receiving end 402 has a wireless reverse charging function, the magnetizing manner of the first magnet 411 and the second magnet 422 may be designed as multipole magnetizing. Thus, the magnetic attraction positioning can be realized when the receiving end 402 receives the power wirelessly transmitted by the transmitting end 401, and the magnetic attraction positioning can be realized when the receiving end 402 serves as the transmitting end to wirelessly transmit the power to the other receiving ends. The following is an illustration with reference to the accompanying drawings.

Fig. 11 shows a schematic diagram of magnetic attraction positioning for wireless reverse charging by radial multipole magnetization according to an embodiment of the present application.

Taking radial 2-pole magnetization as an example, as shown in fig. 11, the first magnet 411 in the transmitting end 401 may include a first portion 411a and a second portion 411b, where the magnetization direction of the first portion 411a is opposite to the magnetization direction of the second portion 411b, for example, the magnetization direction of the first portion 411a is a direction from the inner ring (N pole) toward the outer ring (S pole), and the magnetization direction of the second portion 411b is a direction from the outer ring (N pole) toward the inner ring (S pole).

The second magnet 421 in the receiving end 402 may include a third portion 421a and a fourth portion 421b, where the magnetizing direction of the third portion 421a is opposite to the magnetizing direction of the fourth portion 421b, for example, the magnetizing direction of the third portion 421a is a direction from the outer ring (N pole) toward the inner ring (S pole), and the magnetizing direction of the fourth portion 421b is a direction from the inner ring (N pole) toward the outer ring (S pole).

When the transmitting terminal 401 performs wireless charging to the receiving terminal 402, the position of the first portion 411a of the first magnet 411 corresponds to the position of the third portion 421a of the second magnet 421, and the position of the second portion 411b of the first magnet 411 corresponds to the position of the fourth portion 421b of the second magnet 421. Since the magnetizing direction of the first portion 411a is opposite to the magnetizing direction of the third portion 421a, and the magnetizing direction of the second portion 411b is opposite to the magnetizing direction of the fourth portion 421b, the first portion 411a magnetically attracts the third portion 421a, and the second portion 411b magnetically attracts the fourth portion 421b, so that the first magnet 411 magnetically attracts the second magnet 421, and the magnetic attraction positioning between the transmitting end 401 and the receiving end 402 is realized.

The receiving end 402 has a wireless reverse charging function, for example, it may wirelessly transmit power for the receiving end 403 (may also be referred to as a third device). The receiving end 403 may include a third magnet 431, where the receiving end 403 may be a specific example of the wireless charging receiving device 120 shown in fig. 1, and the third magnet 431 may be a specific example of the ring magnet 310 described above.

The third magnet 431 in the receiving end 403 may include a fifth portion 431a and a sixth portion 431b, where the magnetizing direction of the fifth portion 431a is opposite to the magnetizing direction of the sixth portion 431b, for example, the magnetizing direction of the fifth portion 431a is a direction from the outer ring (N pole) toward the inner ring (S pole), and the magnetizing direction of the sixth portion 431b is a direction from the inner ring (N pole) toward the outer ring (S pole).

When the receiving end 402 (at this time, the role of the receiving end 402 is wireless charging transmitting device) performs wireless charging to the receiving end 403, the position of the fourth portion 421b of the second magnet 421 corresponds to the position of the fifth portion 431a of the third magnet 431, the position of the third portion 421a of the second magnet 421 corresponds to the position of the sixth portion 431b of the third magnet 431, and since the magnetizing direction of the fourth portion 421b is opposite to the magnetizing direction of the fifth portion 431a, the magnetizing direction of the third portion 421a is opposite to the magnetizing direction of the sixth portion 431b, the fourth portion 421b magnetically attracts the fifth portion 431a, and the third portion 421a magnetically attracts the sixth portion 431b, so that the second magnet 421 magnetically attracts the third magnet 431, and the magnetic attraction positioning between the receiving end 402 and the receiving end 403 is realized.

As can be seen from the example in the figure, if the charging postures of the transmitting end 401 and the receiving end 403 are kept unchanged, the receiving end 402 is rotated 180 degrees, so that the magnetic attraction positioning between the receiving end 402 and the transmitting end 401 or the magnetic attraction positioning between the receiving end 402 and the receiving end 403 can be easily realized.

Fig. 12 shows a schematic diagram of magnetic attraction positioning for wireless reverse charging by axial multipole magnetization according to an embodiment of the present application.

Taking the example that the magnets in the transmitting end and the magnets in the receiving end are both axially 2-pole magnetized, as shown in fig. 12, the first magnet 411 in the transmitting end 401 may include a first portion 411a and a second portion 411b, where the magnetization direction of the first portion 411a is opposite to the magnetization direction of the second portion 411b, for example, the magnetization direction of the first portion 411a is a direction pointing into the paper surface, and the magnetization direction of the second portion 411b is a direction pointing out of the paper surface.

The second magnet 421 in the receiving end 402 may include a third portion 421a and a fourth portion 421b, where the magnetizing direction of the third portion 421a is opposite to the magnetizing direction of the fourth portion 421b, for example, the magnetizing direction of the third portion 421a is a direction pointing out of the paper, and the magnetizing direction of the fourth portion 421b is a direction pointing in the paper.

The receiving end 402 has a wireless reverse charging function, for example, it can transmit power wirelessly for the receiving end 403. The receiving end 403 may include a third magnet 431, where the receiving end 403 may be a specific example of the wireless charging receiving device 120 shown in fig. 1, and the third magnet 431 may be a specific example of the ring magnet 310 described above.

The third magnet 431 in the receiving end 403 may include a fifth portion 431a and a sixth portion 431b, where the magnetizing direction of the fifth portion 431a is opposite to the magnetizing direction of the sixth portion 431b, for example, the magnetizing direction of the fifth portion 431a is a direction pointing out of the paper, and the magnetizing direction of the sixth portion 431b is a direction pointing in the paper.

It will be appreciated that the scenario of multipole magnetization applied to wireless reverse charging was described above in connection with fig. 11 and 12 taking 2-pole magnetization as an example, but the application is not limited thereto. For example, the first magnet 411, the second magnet 421, and the third magnet 431 mentioned above may be 4-pole magnetized, 6-pole magnetized, or 8-pole magnetized, and the like, and accordingly, when the receiving end 402 is used for wireless reverse charging, the magnetic attraction positioning between the receiving end 402 and the receiving end 403 may be achieved every odd multiple of 90 degrees (corresponding to 4-pole magnetization), 60 degrees (corresponding to 6-pole magnetization), 45 degrees (corresponding to 8-pole magnetization), or the like.

To sum up, in some embodiments, the transmitting end 401 may charge the receiving end 402 or the receiving end 403 wirelessly, and the receiving end 402 has a wireless reverse charging function and may charge the receiving end 403 wirelessly. When the transmitting end 401 charges the receiving end 402 wirelessly, the first magnet 411 and the second magnet 421 are attracted together, wherein an included angle between the transmitting end 401 and the receiving end 402 is a first angle. When the transmitting end 401 charges the receiving end 403 wirelessly, the first magnet 411 and the third magnet 431 attract each other, wherein an included angle between the transmitting end 401 and the receiving end 403 is also the first angle. When the receiving end 402 is the receiving end 403 and is charged wirelessly, the second magnet 421 is attracted to the third magnet 431, wherein an included angle between the receiving end 402 and the receiving end 403 is a second angle, a difference between the second angle and the first angle is an odd multiple of 360 °/N, and N is a magnetizing order of the second magnet 421.

Here, the angle between the transmitting end 401 and the receiving end 402 may be specifically an angle between a first reference axis of the transmitting end 401 and a second reference axis of the receiving end 402; the angle between the transmitting end 401 and the receiving end 403 may be specifically an angle between a first reference axis of the transmitting end 401 and a third reference axis of the receiving end 403; the angle between the receiving end 402 and the receiving end 403 may be specifically an angle between a second reference axis of the receiving end 402 and a third reference axis of the receiving end 403.

For example, the first reference axis may be an axis perpendicular to the thickness direction of the first magnet 411 and perpendicular to the direction of the binocular wiring when the user is using the transmitting end 401 in the forward direction, the second reference axis may be an axis perpendicular to the thickness direction of the second magnet 421 and perpendicular to the direction of the binocular wiring when the user is using the receiving end 402 in the forward direction, and the third reference axis may be an axis perpendicular to the thickness direction of the third magnet 431 and perpendicular to the direction of the binocular wiring when the user is using the receiving end 403 in the forward direction.

When the receiving end 402 is used for wireless reverse charging, the odd number times of rotation (360 °/magnetizing stage number) realizes magnetic attraction alignment between the receiving ends to support wireless reverse charging of the receiving ends.

With the popularization of vehicles, automobiles and the like have become an indispensable transportation means in people's daily lives. However, the development period of the vehicle is long, the updating iteration is slow, and the requirements of diversification and individuation of consumers are difficult to meet. Consumer electronic products such as mobile phones and watches are convenient for consumers to carry, and can adapt to rapidly-changing scene demands due to the advantages of short life cycle and rapid updating iteration. Thus, ecological integration of the consumer electronics industry and the automotive industry is imperative. In the embodiment of the application, the wireless charging module can be applied to a vehicle, and is favorable for pushing the consumer electronic product to get on the vehicle.

In some embodiments, the wireless charging module provided by the embodiment of the application can be arranged at least one place of an operating platform, a seat back, a door inner handrail, a central handrail, a door inner decoration board and a trunk of a vehicle, and a user can charge the vehicle-mounted ecological equipment conveniently through the wireless charging module. In this embodiment, when wireless charging module sets up in the vehicle, this wireless charging module can be connected with the power supply circuit electricity in the vehicle, and wireless charging module's energy source is the vehicle. In other words, the wireless charging module obtains energy from the power supply circuit of the vehicle and can perform wireless charging for other devices.

In some embodiments, the wireless charging module provided in the embodiments of the present application may be fixedly installed in a vehicle as a front mounting, that is, before the whole vehicle leaves the factory, the wireless charging module is already built in the vehicle as a front mounting. Therefore, the vehicle can charge the vehicle-mounted ecological equipment without an exposed wire or a charging interface, the aesthetic property can be improved, and the personalized and diversified scene requirements of the user can be met.

In other embodiments, the wireless charging module provided in the embodiments of the present application is installed in a vehicle through a detachable connection structure, for example, the wireless charging module is installed in the vehicle through a clamping jaw, a buckle, a thread, a fastening tape, and the like. Therefore, a user can conveniently use the wireless charging module to charge the vehicle-mounted ecological equipment at different positions of the vehicle. In some embodiments, the wireless charging module may be electrically connected to a charging interface on the vehicle through a charging connector or by way of contacts.

Fig. 13 shows a schematic diagram of a wireless charging module applied to a vehicle according to an embodiment of the present application.

In some embodiments, the wireless charging module 300 or the first wireless charging module 410 provided herein may be built into the front-loading of the vehicle 160. For example, as shown in fig. 13, the wireless charging module provided in the embodiments of the present application may be built into a console (or instrument desk), a seatback, a door inner armrest, a center armrest, a door inner trim, a trunk, or the like of a vehicle 160. For example, a wireless charging module built-in at the console can be used for wirelessly charging the intelligent ornament; the wireless charging module arranged in the seat back can be used for wirelessly charging equipment such as a nursing camera, a tablet, a mobile phone and the like; the wireless charging module arranged in the handrail in the door can be used for wirelessly charging equipment such as a child story machine, a mobile phone, a watch and the like; the wireless charging module arranged in the central armrest can be used for wirelessly charging a game handle, a mobile phone and the like; the wireless charging module arranged in the trunk can be used for wireless charging of outdoor lighting equipment, vehicle dust collectors and the like.

In other embodiments, the wireless charging module 300 or the first wireless charging module 410 provided herein may be detachably connected with components in the vehicle 160. For example, as shown in fig. 13, the wireless charging module provided in the embodiments of the present application may be detachably connected to a console (or instrument desk), a seatback, a door inner armrest, a center armrest, a door inner trim, a trunk, and the like of the vehicle 160. For example, when a user needs to wirelessly charge the smart ornament, the wireless charging module can be connected to the console; when a user needs to charge equipment such as a nursing camera, a tablet, a mobile phone and the like in a wireless manner, the wireless charging module can be connected to the chair back; when a user needs to wirelessly charge the children story machine, the mobile phone, the watch and other equipment, the wireless charging module can be connected to the position of the handrail in the door; when a user needs to charge the game handle, the mobile phone and the like wirelessly, the wireless charging module can be connected to the central armrest; when a user needs to wirelessly charge outdoor lighting equipment, an on-vehicle dust collector and the like, the wireless charging module can be connected to the trunk.

By way of example and not limitation, the wireless charging module may be mounted in the vehicle 160 via a detachable connection structure, which may promote flexibility in charging. Fig. 14 is an assembly schematic diagram of a wireless charging module and a detachable connection structure according to an embodiment of the present application. As shown in fig. 14, taking the wireless charging module 410 as an example, the wireless charging module 410 is connected to the detachable connection structure 510, and the wireless charging module 410 can be connected to the vehicle 160 through the detachable connection structure 510.

In some embodiments, the wireless charging module 410 and the detachable connection structure 510 may be fixedly connected or rotatably connected, which is not limited in this embodiment.

In some embodiments, the removable connection 510 may be a snap connection, a threaded connection, a jaw connection, an adhesive buckle connection, etc. with components on the vehicle 160, as embodiments of the present application are not limited in this respect.

In the embodiment of the application, the consumer electronic product is fixed in a magnetic attraction mode, so that the problem that the vehicle is unstable in fixation of the vehicle-mounted ecological equipment in the moving process can be avoided, and abnormal sound in running is reduced or avoided. In addition, the vehicle can charge the vehicle-mounted ecological equipment in a wireless mode, so that the problem of using pain points of various vehicle-mounted ecological equipment caused by different types and different positions of power supply ports of the existing vehicle is solved. In addition, the vehicle supplies power for the vehicle-mounted ecological equipment in a wireless mode, so that the power supply mode can be unified, an exposed wire or a charging interface is not needed, and the attractiveness is improved. When the wireless charging module in the vehicle is used by a user to charge the vehicle-mounted ecological equipment, automatic connection and extremely simple connection can be realized, and the user experience is comfortable.

Of course, in other embodiments, the wireless charging module installed in the vehicle 160 may be self-contained, i.e., the wireless charging module is mechanically coupled to the vehicle 160 only and not electrically coupled to the circuitry of the vehicle 160.

Fig. 15 shows a schematic structural diagram of a wireless charging module provided in an embodiment of the present application. The wireless charging module 610 shown in fig. 15 may be a specific example of the wireless charging module 300 or the first wireless charging module 410.

As shown in fig. 15, the wireless charging module 610 may include a ring magnet 611, a coil 612, and a housing 613, the housing 613 being formed with a chamber for accommodating the ring magnet 611 and the coil 612. The description of the ring magnet 611 and the coil 612 may refer to the description of the ring magnet 310, the coil 320, the first magnet 411, and the first coil 412 in the foregoing embodiments, and will not be repeated herein for brevity.

In some embodiments, referring to fig. 15, an auxiliary fixing portion 614 is provided on the housing 613, and the auxiliary fixing portion 614 can assist in fixing the transmitting end and the receiving end. The auxiliary fixing portion 614 may be an elastic claw, a buckle, a snap, or the like, for example.

The auxiliary fixing part is arranged on the wireless charging module, so that the receiving end can be fixed in an auxiliary manner, and even if the volume (or weight) of the receiving end is large, the attraction direction between the receiving end and the transmitting end is not coincident with the gravity direction of the receiving end (such as vertical), the vehicle acceleration and deceleration and the like, the receiving end can be stably fixed, the movement of the receiving end relative to the transmitting end is reduced, and the charging efficiency is improved.

The wireless charging module provided by the embodiment of the application can be applied to a vehicle, so that the vehicle can wirelessly charge the vehicle-mounted ecological equipment fixed in the vehicle in a magnetic attraction manner. In other embodiments, the magnet (such as the ring magnet (e.g. ring magnet 310) or the magnet array provided in the embodiments of the present application) may be separately applied to a vehicle, so as to implement magnetic attraction auxiliary fixation of the vehicle-mounted ecological device. In this case, the vehicle may or may not have the capability of charging the in-vehicle ecological device; when the vehicle can charge the vehicle-mounted ecological equipment, the vehicle can realize charging in at least one of a wired mode, a wireless mode and a contact mode.

For example, the magnet a may be built into the vehicle or mounted in the vehicle by a detachable connection structure, and the in-vehicle ecological device is provided with a magnet B (for example, the magnet B may be provided on a housing of the in-vehicle ecological device or on a protective cover of the in-vehicle ecological device), wherein the magnet a in the vehicle and the magnet B in the in-vehicle ecological device are a male end and a female end, respectively, and the in-vehicle ecological device and a component in the vehicle are fixed by magnetic attraction between the male end and the female end. If the vehicle can charge the vehicle-mounted ecological equipment, the vehicle can charge the vehicle-mounted ecological equipment in any one of a wired mode, a wireless mode and a contact mode. When the vehicle charges the vehicle-mounted ecological equipment in a wired mode, the vehicle-mounted ecological equipment and the vehicle are respectively provided with a charging interface, and the vehicle-mounted ecological equipment can be electrically connected through a connecting wire. When the vehicle charges the vehicle-mounted ecological equipment in a wireless mode, the vehicle-mounted ecological equipment and the vehicle are respectively provided with coils, and energy transmission between the vehicle and the vehicle-mounted ecological equipment can be realized through coupling of the coils. When the vehicle charges the vehicle-mounted ecological equipment in a contact mode, the vehicle-mounted ecological equipment and the vehicle are respectively provided with contacts, and the vehicle-mounted ecological equipment can be electrically connected with the vehicle-mounted ecological equipment through the contact of the contacts.

In some embodiments, the vehicle may determine whether to trigger the preset event by detecting the magnitude of the magnetic attraction between the wireless charging module and the in-vehicle ecological device.

For example, when the vehicle detects that the magnetic attraction between the wireless charging module and the vehicle-mounted ecological device is greater than a preset value, an event for charging the vehicle-mounted ecological device can be triggered; when the magnetic attraction between the wireless charging module and the vehicle-mounted ecological equipment is detected to be smaller than a preset value, an event of stopping charging the vehicle-mounted ecological equipment can be triggered.

For another example, when the vehicle detects that the magnetic attraction between the wireless charging module and the vehicle-mounted ecological equipment is larger than a preset value, the user can be confirmed to get on the vehicle, and the operation of locking the vehicle door is triggered.

For another example, the vehicle can judge whether the vehicle-mounted ecological equipment is connected with the vehicle through magnetic strength change, and when the vehicle detects that the magnetic attraction between the wireless charging module and the vehicle-mounted ecological equipment is larger than a preset value, an event of automatic connection can be triggered.

By way of example and not limitation, FIG. 16 shows a schematic flow chart of a vehicle triggering an automatic connect event based on magnetic strength. The method shown in fig. 16 may be performed by a vehicle, and in particular, may be performed by a computing platform in the vehicle, which may include at least one processor. As shown in fig. 16, the method may include steps S701 to S706.

S701, the vehicle judges the basic magnetic field intensity.

When the in-vehicle ecological device is not close to a magnet provided in the vehicle, the vehicle may detect the basic magnetic field strength, for example, close to 0.

S702, the vehicle judges the magnetic field intensity change.

When the in-vehicle ecological device approaches the magnet provided in the vehicle, the magnet in the in-vehicle ecological device generates magnetic attraction with the magnet in the vehicle, and the vehicle can detect that the magnetic field strength changes, for example, the magnetic field strength is continuously increased.

S703, the vehicle determines whether the magnetic field strength is greater than a preset value.

If not, the vehicle repeatedly executes step S701 and step S702.

If yes, go on to step S704.

S704, the vehicle starts a bluetooth connection.

S705, the vehicle receives a bluetooth connection request sent by the vehicle-mounted ecological device.

S706, the vehicle responds to the bluetooth connection request, for example, transmits a confirmation connection bluetooth.

In some embodiments, step S701 and step S702 may be replaced with steps of: the magnetic field strength is detected.

The vehicle can automatically initiate connection confirmation through magnetic judgment.

In other embodiments, the method shown in fig. 16 may also be performed by the in-vehicle ecological device, i.e. the in-vehicle ecological device may detect the magnetic field strength and automatically initiate a bluetooth connection when the magnetic field strength is greater than a preset value.

Fig. 17 shows a schematic block diagram of a wireless charging system according to an embodiment of the present application. As shown in fig. 17, the wireless charging system may include an in-vehicle connector 810 and an in-vehicle ecological device 820, wherein the in-vehicle connector 810 is disposed in a vehicle (such as the vehicle 160 described above), and the in-vehicle ecological device 820 may be a portable electronic device, such as a cell phone, a tablet, a watch, a bracelet, a mobile charger, or the like.

The in-vehicle connector 810 may include a first matching unit 811, a first coil 812, a first wireless charging circuit 813, a first computing unit 814, and a first communication module 815.

The in-vehicle ecological device 820 may include a second matching unit 821, a second coil 822, a second wireless charging circuit 823, a second computing unit 824, a second communication module 825, a battery 826, and a storage unit 827.

The first matching unit 811 and the second matching unit 821 are magnets, such as ring magnets or magnet arrays as referred to in the foregoing embodiments. A magnetic attraction force may be generated between the first matching unit 811 and the second matching unit 821 to fix the in-vehicle ecological device 820 and the in-vehicle connector 810 together in a magnetic attraction manner.

The first coil 812 and the second coil 822 are coupled coils, such as the coils described in the previous embodiments. Energy can be transmitted between the first coil 812 and the second coil 822 in a wireless manner to achieve wireless charging of the vehicle on-board ecological device 820 by the vehicle.

The first calculation unit 814 may control the first wireless charging circuit 813 to input a current to the first coil 812. The second computing unit 824 may control the second wireless charging circuit 823 to receive current from the second coil 822. The second wireless charging circuit 823 may be connected to the battery 826 to input the received current into the battery 826 to enable storage of electrical energy.

The storage unit 827 is used for storing computer program instructions, and the second computing unit 824 may call from the storage unit 827 and execute the instructions in the storage unit 827 to implement the corresponding functions.

In some embodiments, the first computing unit 814 may control the first communication module 815 to initiate a bluetooth connection request to the second communication module 825 according to the magnitude of the magnetic attraction (or magnetic field strength) between the first matching unit 811 and the second matching unit 821.

In other embodiments, the second computing unit 824 may control the second communication module 825 to initiate a bluetooth connection request to the first communication module 815 according to the magnitude of the magnetic attraction (or magnetic field strength) between the first matching unit 811 and the second matching unit 821.

In some embodiments, when the vehicle detects that the wireless charging module charges the on-vehicle ecological device, charging state information of at least one power receiving device (i.e., the on-vehicle ecological device) being charged may be displayed on the central control screen. For example, the charge state information of the power receiving device may include at least one of: the method comprises the steps of current electric quantity, charging voltage, battery total capacity, (input) charging current, charging input power, charging internal resistance, charging temperature, battery health status, charging and discharging cycle times, wireless charging energy efficiency ratio, equipment identification and equipment icon of the power receiving equipment.

In some embodiments, when the vehicle detects that the wireless charging module charges the on-board ecological device, charging state information of the power supply device (i.e., the vehicle) may be displayed on the central control screen. For example, the charging state information of the power supply device may include at least one of: charging voltage, charging current, charging temperature, current electric quantity, battery health state and charging output power of the power supply equipment.

In some embodiments, when the vehicle detects that the wireless charging module charges the vehicle-mounted ecological device, charging prediction information may be displayed on the central control screen. For example, the charge estimation information may include at least one of estimated full time period and estimated consumed power.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wireless charging module, comprising:

A coil for wirelessly transmitting power;

the annular magnet is arranged on the periphery of the coil, the annular magnet is of an integrated structure, the coil is surrounded by the inner ring of the annular magnet, and a gap is reserved between the inner ring of the annular magnet and the coil.

2. The wireless charging module of claim 1, wherein the ring magnet is made of a permanent magnet material or a soft magnetic material.

3. The wireless charging module of claim 2, wherein the wireless charging module comprises,

the ring magnet is made of at least one of the following permanent magnetic materials:

bonded NdFeB, bonded ferrite, samarium cobalt, aluminum nickel cobalt, sintered ferrite and sintered NdFeB;

or alternatively, the process may be performed,

the ring magnet is made of at least one of the following soft magnetic materials:

iron, iron nickel, iron silicon, amorphous, nanocrystalline.

4. A wireless charging module according to any one of claims 1 to 3, wherein the thickness of the ring magnet is greater than or equal to 0.2 mm and less than or equal to 5 mm.

5. The wireless charging module of claim 4, wherein the thickness of the ring magnet is greater than or equal to 0.2 millimeters and less than or equal to 1 millimeter.

6. The wireless charging module of any one of claims 1 to 5, wherein the number of magnetization steps of the ring magnet is greater than or equal to 1 and less than or equal to 8.

7. The wireless charging module of any one of claims 1 to 6, wherein the direction of magnetization of the ring magnet is axial multipole magnetization or radial multipole magnetization.

8. The wireless charging module of any one of claims 1 to 7, wherein the wireless charging module is disposed in a vehicle.

9. The wireless charging module of claim 8, wherein the wireless charging module is disposed at least one of a console, a seat back, a door inner armrest, a center armrest, a door inner trim, a trunk of the vehicle.

10. The wireless charging module according to claim 8 or 9, wherein,

the wireless charging module is fixedly arranged in the vehicle as a front mounting piece; or alternatively, the process may be performed,

the wireless charging module is installed in the vehicle through a detachable connection structure.

11. A wireless charging device comprising a wireless charging module according to any one of claims 1 to 10.

12. The wireless charging device of claim 11, wherein the wireless charging device is a vehicle.

13. The wireless charging device of claim 12, wherein the wireless charging module is disposed at least one of a console, a seat back, a door inner armrest, a center armrest, a door inner trim, a trunk of the vehicle.

14. The wireless charging device according to claim 12 or 13, wherein,

15. A wireless charging system, comprising:

the first device comprises a first wireless charging module, wherein the first wireless charging module comprises a first coil and a first magnet, the first magnet is annular, an inner ring of the first magnet surrounds the first coil, and a gap is reserved between the inner ring of the first magnet and the first coil;

the second device comprises a second wireless charging module, the second wireless charging module comprises a second coil and a second magnet, the second magnet is annular, an inner ring of the second magnet surrounds the second coil, and a gap is reserved between the inner ring of the second magnet and the second coil;

When the first device is in wireless charging for the second device through the first coil and the second coil, the first magnet and the second magnet are attracted to each other, so that the first coil and the second coil are aligned.

16. The wireless charging system of claim 15, wherein the material of the first magnet and/or the second magnet is a permanent magnet material.

17. The wireless charging system of claim 16, wherein the material of the first magnet and/or the second magnet comprises at least one of the following permanent magnet materials:

bonded NdFeB, bonded ferrite, samarium cobalt, aluminum nickel cobalt, sintered ferrite and sintered NdFeB.

18. The wireless charging system of claim 16 or 17, wherein one of the first magnet and the second magnet is a permanent magnet material and the other of the first magnet and the second magnet is a soft magnetic material, wherein the soft magnetic material comprises at least one of:

iron, iron nickel, iron silicon, amorphous, nanocrystalline.

19. The wireless charging system of any of claims 15-18, wherein the first magnet has a thickness greater than or equal to 0.2 millimeters and less than or equal to 5 millimeters.

20. The wireless charging system of any of claims 15-19, wherein the thickness of the second magnet is greater than or equal to 0.2 millimeters and less than or equal to 1 millimeter.

21. The wireless charging system of any one of claims 15 to 20, wherein an absolute value of a difference between a thickness of the first magnet and a thickness of the second magnet is greater than or equal to 0.2 times a thickness of the second magnet and less than or equal to 4 times a thickness of the second magnet.

22. The wireless charging system according to any one of claims 15-21, wherein,

the magnetizing modes of the first magnet and the second magnet are axial magnetizing, and when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is the same as the magnetizing direction of the second magnet; or alternatively, the process may be performed,

the magnetizing modes of the first magnet and the second magnet are radial magnetizing, and when the first magnet and the second magnet are attracted, the magnetizing direction of the first magnet is opposite to or the same as the magnetizing direction of the second magnet.

23. The wireless charging system of any one of claims 15 to 22, wherein the number of magnetization of the first magnet is greater than or equal to 1 and less than or equal to 8, the number of magnetization of the second magnet is greater than or equal to 1 and less than or equal to 8, and the number of magnetization of the first magnet is the same as the number of magnetization of the second magnet.

24. The wireless charging system of any one of claims 15 to 23, wherein the number of magnetization stages of the first magnet and the second magnet is greater than or equal to 2, the wireless charging system further comprising:

the third device comprises a third coil and a third magnet, wherein the third magnet is annular, an inner ring of the third magnet surrounds the third coil, a gap is reserved between the inner ring of the third magnet and the third coil, and the magnetizing stages of the third magnet, the magnetizing stages of the second magnet and the magnetizing stages of the first magnet are the same;

when the second device performs wireless charging on the third device through the second coil and the third coil, the second magnet is attracted with the third magnet, so that the second coil and the third coil are aligned.

25. The wireless charging system of claim 24, wherein the wireless charging system comprises,

when the first equipment performs wireless charging on the second equipment, the first magnet is attracted with the second magnet, and an included angle between the first equipment and the second equipment is a first angle;

when the first device performs wireless charging on the third device, the first magnet is attracted with the third magnet, and an included angle between the first device and the third device is the first angle;

when the second device performs wireless charging for the third device, the second magnet is attracted with the third magnet, an included angle between the second device and the third device is a second angle, a difference value between the second angle and the first angle is an odd multiple of 360 degrees/N, and N is a magnetizing stage number of the second magnet.

26. The wireless charging system of claim 24 or 25, wherein the first device is a vehicle and the second and third devices are portable electronic devices.

27. The wireless charging system of claim 26, wherein the first wireless charging module is disposed at least one of a console, a seat back, a door trim, a center armrest, a door trim, a trunk of the vehicle.

28. The wireless charging system of claim 26 or 27, wherein the wireless charging system comprises,

the first wireless charging module is fixedly installed in the vehicle as a front mounting piece; or alternatively, the process may be performed,

the first wireless charging module is installed in the vehicle through a detachable connection structure.

29. The wireless charging system according to any one of claims 15-28, wherein,

the first wireless charging module comprises a first shell, and the first coil and the first magnet are accommodated in a first accommodating space formed by the first shell;

the second wireless charging module comprises a second shell, and the second coil and the second magnet are accommodated in a second accommodating space formed by the second shell;

the first shell is provided with a first connecting portion, the second shell is provided with a second connecting portion, and the first shell and the second shell are clamped through the first connecting portion and the second connecting portion.