CN220156292U - Wireless charging module, device and system - Google Patents

Abstract

The embodiment of the application provides a wireless charging module, wireless charging equipment and a wireless charging 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 modules, equipment and systems

Technical field

The embodiments of the present application relate to the field of wireless charging technology, and more specifically, to a wireless charging module, device and system.

Background technique

Wireless charging refers to a method of charging that uses the principle of electromagnetic induction. The wireless charging system includes a transmitter and a receiver. The transmitter converts electrical energy into electromagnetic waves and transmits them in space. The receiver receives electromagnetic waves and converts electromagnetic wave energy into electrical energy, ultimately achieving wireless charging.

With the widespread application of wireless charging technology, users have also put forward higher requirements for wireless charging equipment, especially the charging efficiency of wireless charging equipment. Whether the position of the coil is aligned when the transmitter and receiver are coupled and charged is a key factor affecting the efficiency of wireless charging.

At present, magnetic positioning technology is usually used to align the transmitter coil and the receiver coil. For example, a small magnet array is set outside the coil, and the attraction between the magnets is used to match the coil position. However, the current magnetic positioning technology still has the problem of inaccurate positioning, resulting in low charging efficiency and affecting user experience.

Utility model content

Embodiments of the present application provide a wireless charging module, equipment and system, which can more accurately realize the position alignment of the wireless charging coupling coil, thereby improving wireless charging efficiency.

In a first aspect, a wireless charging module is provided, including: a coil for wirelessly transmitting power; an annular magnet arranged on the periphery of the coil, wherein the annular magnet is an integrally formed structure, and the inner ring of the annular magnet surrounds the coil and is annular. There is a gap between the inner ring of the magnet and the coil.

The wireless charging module provided by the embodiment of the present application can be applied to the transmitter and/or receiver. On the one hand, because the annular magnets set around the outer circumference of the coil are integrally formed, the phenomenon of magnetic leakage is reduced, and the magnetic field is better sealed, which can improve the magnetic attraction between the transmitter and the receiver, thus enabling more accurate wireless charging of the coupling coil. position alignment to improve wireless charging efficiency. On the other hand, the integrated ring magnet is arranged on the periphery of the coil, which can form tight and closed magnetic lines, which will not have a great impact on the internal magnetic field of the wireless charging coil, and can improve the wireless charging efficiency.

In addition, the leakage magnetic field of the integrated ring magnet is small. On the premise that the wireless charging coil is not affected, the distance between the magnet and the coil can be reduced, which is conducive to designing the size of the coil or magnet to improve wireless charging capabilities or improve wireless charging. Charging efficiency, as well as achieving thinner, lighter and smaller modules.

Combined with the first aspect, in a possible implementation manner, the ring magnet is made of permanent magnetic material or soft magnetic material.

When the ring magnet is made of permanent magnet material, the wireless charging module can be applied to the transmitter, so that when the user uses different receivers, wireless charging can be performed through the same transmitter.

When the ring magnet is made of soft magnetic material, the wireless charging module can be applied to the receiving end. This can prevent the ring magnet in the receiving end from affecting the magnetic stripe in the bank card or the magnetic sensor inside the electronic product when the user carries it with him. Possible adverse effects of digital compasses, magnetometers, etc.

In conjunction with the first aspect, in a possible implementation, the material of the ring magnet includes at least one of the following permanent magnet materials: bonded neodymium iron boron, bonded ferrite, samarium cobalt, alnico, and sintered iron Oxygen, sintered neodymium iron boron; or, the material of the ring magnet includes at least one of the following soft magnetic materials: iron, iron-nickel, iron-silicon, amorphous, and nanocrystalline.

Ring magnets made of the above permanent magnet materials have a certain degree of flexibility and will not crack even if the thickness of the magnet is very thin. Ring magnets made of the above-mentioned soft magnetic materials have certain flexibility, are easy to process, and have low cost.

In conjunction with the first aspect, in a possible implementation, 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 a larger device, the thickness of the ring magnet can be designed to be larger, so that it does not affect the space arrangement of the entire device and can also arrange larger-sized coils or coils in sufficient space. Larger magnets can improve the charging capacity or charging efficiency of the device.

In conjunction with the first aspect, in a possible implementation, 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 a smaller device, the thickness of the ring magnet can be designed to be smaller. This can ensure the charging capability or charging efficiency of the device while adapting to the development trend of miniaturized and thinner devices.

In conjunction with the first aspect, in a possible implementation, the gap between the inner ring of the annular magnet and the coil is less than or equal to 2 mm.

The gap between the inner ring of the annular magnet and the coil is small, which is beneficial to saving space or increasing the diameter of the coil or the volume of the magnet in a certain space to improve wireless charging capability or wireless charging efficiency.

Combined with the first aspect, in a possible implementation, the magnetization level of the ring magnet is greater than or equal to 1 and less than or equal to 8.

The magnetization method of the ring magnet can be single-pole magnetization or multi-pole magnetization. When the magnetization level of the annular magnet is small, there are fewer positions for positioning between the transmitter and the receiver, and the combination of the transmitter and the receiver can be more regular to make the charging process more beautiful. When the magnetization level of the annular magnet is large, there are more positions for positioning between the transmitting end and the receiving end, and there are many positioning positions that the user can choose, which can facilitate user operation.

Combined with the first aspect, in a possible implementation, the magnetizing direction of the annular magnet is axial multi-pole magnetization or radial multi-pole magnetization.

In conjunction with the first aspect, in a possible implementation, the wireless charging module is provided in the vehicle.

Setting up a wireless charging module in the vehicle can facilitate users to use the vehicle to wirelessly charge on-board ecological equipment in driving scenarios, which solves the problem of using many on-board ecological equipment caused by the different types and locations of power supply ports in existing vehicles. Pain points. In addition, the vehicle wirelessly supplies power to the on-board ecological equipment, which can unify the power supply method without exposing wires or charging interfaces, improving the appearance. Moreover, magnetically fixing consumer electronics in the vehicle can avoid the problem of unstable fixation of on-board ecological equipment while the vehicle is moving, and reduce or avoid abnormal noises during driving.

In conjunction with the first aspect, in a possible implementation, the wireless charging module is disposed on at least one of the vehicle's console, seat back, door armrest, center armrest, door interior panel, and trunk.

In conjunction with the first aspect, in a possible implementation manner, the wireless charging module is fixedly installed in the vehicle as a front-mounted component.

As a front-mounted component of the vehicle, the wireless charging module does not require exposed wires or charging interfaces, which improves the appearance and helps meet the personalized and diverse scene needs of users.

In conjunction with the first aspect, in a possible implementation manner, the wireless charging module is installed in the vehicle through a detachable connection structure.

The wireless charging module adopts a detachable structure and is installed on the vehicle, making it convenient for users to use the wireless charging module to charge on-board ecological equipment at different locations in the vehicle.

A second aspect provides a wireless charging device, including the wireless charging module in the first aspect or any possible implementation of the first aspect.

Combined with the second aspect, in a possible implementation manner, the wireless charging device is a vehicle.

In conjunction with the second aspect, in a possible implementation, the wireless charging module is disposed on at least one of the vehicle's console, seat back, door armrest, center armrest, door interior panel, and trunk.

Combined with the second aspect, in a possible implementation manner, the wireless charging module is fixedly installed in the vehicle as a front-mounted component.

Combined with the second aspect, in a possible implementation, the wireless charging module is installed in the vehicle through a detachable connection structure.

In a third aspect, a wireless charging system is provided, including: a first device, including a first wireless charging module, the first wireless charging module including a first coil and a first magnet, the first magnet is annular, and the first magnet is The inner ring surrounds the first coil and there is a gap between the inner ring of the first magnet and the first coil; the second device includes a second wireless charging module, and the second wireless charging module includes a second coil and a second magnet. The two magnets are annular, the inner ring of the second magnet surrounds the second coil, and there is a gap between the inner ring of the second magnet and the second coil; wherein, at least one of the first magnet and the second magnet is an integrally formed structure. When the first device wirelessly charges the second device through the first coil and the second coil, the first magnet and the second magnet attract to align the first coil and the second coil.

On the one hand, the annular magnets in the transmitter and/or receiver are integrally formed, and the magnetic field has better sealing properties, which can reduce magnetic leakage and increase the magnetic attraction between the transmitter and receiver, thus enabling more accurate wireless implementation. The position of the charging coupling coil is aligned to improve wireless charging efficiency. On the other hand, the integrated ring magnet is arranged on the periphery of the coil, which can form tight and closed magnetic lines, which will not have a great impact on the internal magnetic field of the wireless charging coil, and can improve the wireless charging efficiency.

Combined with the third aspect, in a possible implementation manner, the material of the first magnet and/or the second magnet is a permanent magnet material.

Combined with the third aspect, in a possible implementation, the material of the first magnet and/or the second magnet includes at least one of the following permanent magnet materials: bonded neodymium iron boron, bonded ferrite, samarium cobalt , Alnico, sintered ferrite, sintered NdFeB.

Combined with the third aspect, in a possible implementation, one of the first magnet and the second magnet is made of a permanent magnetic material, and the other of the first magnet and the second magnet is made of a soft magnetic material. , wherein the soft magnetic material includes at least one of the following materials: iron, iron-nickel, iron-silicon, amorphous, and nanocrystalline.

Combined with the third aspect, in a possible implementation, the thickness of the first magnet is greater than or equal to 0.2 mm and less than or equal to 5 mm.

Combined with the third aspect, in a possible implementation, the thickness of the second magnet is greater than or equal to 0.2 mm and less than or equal to 1 mm.

Combined with the third aspect, in a possible implementation, the absolute value of the 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 the thickness of the second magnet. 4 times the thickness of the second magnet.

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

Combined with the third aspect, in a possible implementation, the first magnet and the second magnet are both magnetized in an axial direction. When the first magnet and the second magnet are attracted, the first magnet is magnetized The direction is the same as the magnetization direction of the second magnet; or, the magnetization mode of the first magnet and the second magnet is both radial magnetization. When the first magnet and the second magnet are attracted, the magnetization direction of the first magnet The direction of magnetization is opposite or the same as that of the second magnet.

For example, when the first magnet and the second magnet are both magnetized in a radial direction, if the projection of the first magnet in the axial direction overlaps with the projection of the second magnet in the axial direction, then when the first magnet and the second magnet are magnetized in the axial direction, When the two magnets are attracted together, the magnetizing direction of the first magnet is opposite to the magnetizing direction of the second magnet. If the axial projection of the first magnet does not overlap with the axial projection of the second magnet, for example, the first magnet is located on a mobile phone and the second magnet is located on a watch, then when the first magnet and the second magnet are attracted together , the magnetizing direction of the first magnet is the same as the magnetizing direction of the second magnet.

Combined with the third aspect, in a possible implementation, the magnetization level of the first magnet is greater than or equal to 1 and less than or equal to 8, and the magnetization level of the second magnet is greater than or equal to 1 and less than or equal to 8, The magnetization level of the first magnet is the same as the magnetization level of the second magnet.

Combined with the third aspect, in a possible implementation, the magnetization levels of the first magnet and the second magnet are greater than or equal to 2, and the wireless charging system further includes: a third device, including a third coil and a third magnet, The third magnet is annular, the inner ring of the third magnet surrounds the third coil, and there is a gap between the inner ring of the third magnet and the third coil. The magnetization level of the third magnet, the magnetization level of the second magnet, The first magnets have the same magnetization level; when the second device wirelessly charges the third device through the second coil and the third coil, the second magnet and the third magnet attract each other, so that the second coil and the third Coil alignment.

The second device can either serve as a receiving end to receive power transmitted by the first device, or can serve as a transmitting end to transmit power to a third device. The multi-pole magnetization method of the second magnet can enable the second device to communicate with the third device while receiving power. One device engages, and a second device engages a third device while emitting power.

Combined with the third aspect, in a possible implementation, when the first device wirelessly charges the second device, the first magnet and the second magnet attract each other, and the angle between the first device and the second device is the first angle; when the first device wirelessly charges the third device, the first magnet and the third magnet attract each other, and the angle between the first device and the third device is the first angle; when the second device When wirelessly charging a third device, the second magnet and the third magnet attract each other, and the angle between the second device and the third device is the second angle, where the difference between the second angle and the first angle is an odd multiple of 360°/N, and N is the magnetization level of the second magnet.

When the second device is used for wireless reverse charging, it can be rotated by an odd multiple of (360°/magnetization level) to achieve magnetic attraction and positioning between the second device and the third device, thereby achieving a connection between the receiving end and the receiving end. They are magnetically aligned to support wireless reverse charging at the receiving end.

Combined with the third aspect, in a possible implementation, the first device is a vehicle, and the second device and the third device are portable electronic devices.

Combined with the third aspect, in a possible implementation, the first wireless charging module is disposed on at least one of the vehicle's console, seat back, door armrest, center armrest, door interior panel, and trunk. .

Combined with the third aspect, in a possible implementation manner, the first wireless charging module is fixedly installed in the vehicle as a front-mounted component.

Combined with the third aspect, in a possible implementation manner, the first wireless charging module is installed in the vehicle through a detachable connection structure.

Combined with the third aspect, in a possible implementation, the first wireless charging module includes a first housing, the first coil and the first magnet are accommodated in a first accommodation space formed by the first housing; the second wireless charging module The charging module includes a second housing, the second coil and the second magnet are accommodated in a second accommodation space formed by the second housing; the first housing is provided with a first connection portion, and the second housing is provided with a second connection part, the first housing and the second housing are snapped together through the first connecting part and the second connecting part.

Through the snap connection between the first housing and the second housing, the first device and the second device can be more stably fitted together.

The beneficial effects of the devices involved in the above second to third aspects can be referred to the first aspect, and will not be described again for the sake of simplicity.

Description of the drawings

Figure 1 is a schematic diagram of a wireless charging system applicable to this application.

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

Figure 3 is a schematic diagram of the wireless charging principle applicable to this application.

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

Figure 5 is a schematic diagram of the unipolar magnetization method provided by the embodiment of the present application.

Figure 6 is a schematic diagram of a multi-pole magnetization method provided by an embodiment of the present application.

Figure 7 is a schematic structural diagram of a wireless charging module provided by an embodiment of the present application.

Figure 8 is a schematic diagram of a wireless charging system provided by an embodiment of the present application.

Figure 9 is a schematic diagram of the radial magnetization of the magnet provided by the embodiment of the present application.

Figure 10 is a schematic diagram of the axial magnetization of the magnet provided by the embodiment of the present application.

Figure 11 is a schematic diagram of the magnetic attraction positioning of radial multi-pole magnetization for wireless reverse charging provided by the embodiment of the present application.

Figure 12 is a schematic diagram of the magnetic attraction and positioning of axial multi-pole magnetization for wireless reverse charging provided by the embodiment of the present application.

Figure 13 is a schematic diagram of the wireless charging module provided by the embodiment of the present application being applied to a vehicle.

Figure 14 is a schematic assembly diagram of the wireless charging module and the detachable connection structure provided by the embodiment of the present application.

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

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

Figure 17 is a schematic structural block diagram of a wireless charging system provided by an embodiment of the present application.

Detailed ways

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 this application, unless otherwise stated, "/" means or, for example, A/B can mean A or B; "and/or" in this article is just one Describing the association relationship of associated objects, it means that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

In the embodiments of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In addition, in the description of the embodiments of this application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two, or more than two. The singular expressions "a," "an," "the," "above," "the," and "this" are intended to also include expressions such as "one or more" unless the context clearly indicates otherwise. .

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

In the description of the embodiments of the present application, the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. indicate an orientation or positional relationship relative to The components in the drawings are schematically defined by the orientation or position in which they are placed. It should be understood that these directional terms are relative concepts and are used for relative description and clarification rather than indicating or implying the devices or components referred to. It must have a specific orientation, or be constructed and operated in a specific orientation, which may change accordingly depending on the orientation in which the components are placed in the drawings, and therefore cannot be construed as limiting the present application. In addition, the "vertical" involved in this application is not vertical in the strict sense, but within the allowable error range. "Parallel" is not parallel in the strict sense, but within the allowable error range.

In the embodiments of the present application, the same reference numerals refer to the same components or components. For the same components in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral as an example. It is understood that the same reference numerals apply to other identical parts or components. In addition, each component in the drawings is not drawn to actual scale, and the sizes and dimensions of the components shown in the drawings are only exemplary and should not be understood as limiting the present application.

To facilitate understanding, the technical terms involved in this application are first explained and described below.

Wireless charging means that the device does not need to rely on electrical wires, but uses the principle of electromagnetic wave induction, the principle of electromagnetic wave resonance, or other technologies that use magnetic fields as a bridge to transmit power. Corresponding equipment is used at the sending end and receiving end to send and receive AC signals. A technology for charging.

Electromagnetic induction wireless charging is a technology that uses alternating current of a certain frequency in the primary coil to generate a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmitter to the receiver to achieve wireless charging.

Magnet refers to a substance or material that can generate a magnetic field or a magnetic object. Magnets have two polarities. Any magnet has two magnetic poles, namely the magnetic north pole N (also called N pole) and the magnetic south pole S (also called S pole). Each part of the magnet has different magnetic strengths, and the magnetic poles are the strongest magnetic parts of the magnet. There is an interaction between magnetic poles. Magnetic poles with the same name repel each other and magnetic poles with different names attract each other. Magnets are generally divided into permanent magnets and soft magnets.

Permanent magnet refers to a magnet that can maintain its magnetism for a long time. Permanent magnets are hard magnets that are not easy to lose magnetism and are not easy to be magnetized.

Permanent magnetic materials refer to materials that are difficult to magnetize and are difficult to demagnetize once magnetized. Its main feature is that it has high coercive force (usually greater than 1000 A/m (A/m)).

Soft magnets refer to magnets that are easy to be magnetized, and their magnetism is easy to disappear after being magnetized, and the magnetism cannot be maintained for a long time.

Soft magnetic materials refer to magnetic materials with low coercive force (less than 1000A/m, usually less than 100A/m) and high magnetic permeability. Its main feature is that it is easy to magnetize and demagnetize, and can be achieved with a minimum external magnetic field. Maximum magnetization strength.

Coercive force refers to the magnetic field strength that reduces the residual magnetism (residual magnetic flux density or residual magnetization intensity) of a magnetic material to zero after being magnetized and then demagnetized. Coercive force is also called coercive magnetic field, represented by the symbol Hc. Usually the remanence of soft magnets is small or very small, and the remanence of permanent magnets is large, so the coercive force of permanent magnets is greater than the coercive force of soft magnets.

Demagnetization refers to adding a magnetic field (called a magnetizing field) to magnetize a magnetic material, and then adding a magnetic field in the opposite direction to the magnetizing field to reduce its magnetism.

Magnetization refers to the process of magnetizing magnetic substances or increasing the magnetism of a magnet with insufficient magnetism to reach a state of technical saturation. Generally, the magnetic object to be magnetized is placed in the magnetic field formed by a coil with direct current passing through it.

For square magnets, the magnetization directions can be divided into thickness magnetization, length magnetization and width magnetization. Thickness magnetization means that the two ends of the magnet in the thickness direction (that is, the maximum area) are magnetized; length magnetization means that the two ends of the magnet in the length direction are magnetized; width magnetization means that the two ends of the magnet in the width direction are magnetized. . Length magnetization and width magnetization can also be collectively referred to as side magnetization.

For cylindrical magnets or ring magnets, the magnetization direction can be divided into radial magnetization and axial magnetization. Radial magnetization means that the magnet has magnets at both ends in the diameter direction, and axial magnetization means that the magnet has magnets at both ends perpendicular to the diameter direction (that is, the length direction or thickness direction). In addition, the magnetization direction of the ring magnet can also include radiation magnetization, specifically, there is magnetization on the inner diameter side and the outer diameter side of the ring, such as N outside and S inside or S outside and N inside.

Unipolar magnetization means that after magnetization, the magnet presents an N pole and an S pole on a plane.

Multi-pole magnetization means that after magnetization, the magnet presents multiple N poles and multiple S poles on a plane.

Figure 1 shows a schematic diagram of a wireless charging system applicable to this application.

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 the wireless charging transmitting device 110 and the wireless charging receiving device 120 can realize energy transfer through energy coupling. More specifically, the wireless charging transmitting device 110 serves as an energy source and can charge the wireless charging receiving device 120 using the principle of electromagnetic induction.

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

In the embodiment of the present application, the wireless charging transmitting device 110 or the wireless charging receiving device 120 can be, for example, a smartphone, a smart watch, a smart bracelet, a stylus, an earphone, a charging box, a tablet computer, an e-reader, a notebook computer, a camera, Vehicle-mounted equipment, wireless chargers, mobile chargers (also called power banks or power banks), wearable devices (such as smart glasses, smart jewelry, etc.), virtual reality (VR) terminal devices, augmented reality (augmentedreality, Devices with wireless charging functions such as AR) terminal devices, smart home devices (such as smart screens, smart TVs) or vehicles.

As an example and not a limitation, the wireless charging transmitting device 110 is a charging base, and the wireless charging receiving device 120 is a mobile phone; or the wireless charging transmitting device 110 is a charging box, and the wireless charging receiving device 120 is a wireless earphone; or the wireless charging transmitting device 110 It is a smart phone, and the wireless charging receiving device 120 is a smart watch; or the wireless charging transmitting device 110 is a vehicle, and the wireless charging receiving device 120 is a portable electronic device such as a mobile phone, a tablet computer, etc.

In some embodiments, the wireless charging system 100 may also include a charger 130 connected to the wireless charging transmitting device 110 . The charger 130 can be used to receive commercial power and convert the commercial power into direct current and output it to the wireless charging transmitting device 110 , or the charger 130 can be used to directly output the received AC mains power to the wireless charging transmitting device 110 . The wireless charging transmitting device 110 is used to convert the received electric energy into electromagnetic signals and transmit them to the outside world. The wireless charging receiving device 120 is used to receive electromagnetic signals and convert the electromagnetic signals into electrical energy, thereby realizing wireless charging.

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

In some embodiments, the wireless charging receiving device 120 can also be used as an energy source to charge other devices that support wireless charging. For example, a mobile phone with a wireless charging function can charge devices such as headphones, watches, or other mobile phones that support wireless charging. That is to say, the wireless charging receiving device 120 can not only receive the power provided by the wireless charging transmitting device 110, but also serve as a wireless charging transmitting device to charge other wireless charging receiving devices, that is, it supports the wireless reverse charging function. Different from the power supply method of the wireless charging base, wireless reverse charging energy mainly relies on the device battery, and the charging power is relatively small.

It should be noted that "the device has a wireless charging function" or similar descriptions mentioned in this application can be understood to mean that the device has the ability to transmit power to other devices through wireless means, and/or that the device has the ability to receive power through wireless means. The ability of other devices to transmit electricity. In other words, the device can be a transmitter or a receiver.

It should be noted that the "device has a wireless reverse charging function" or similar descriptions involved in this application can be understood to mean that the device has the ability to receive power transmitted by other devices through wireless means and has the ability to wirelessly charge power for other devices. The ability to transmit electricity.

Figure 2 shows a schematic diagram of several wireless reverse charging scenarios provided by embodiments of the present application. It can be understood that the embodiments of the present application do not limit the specific form of the wireless reverse charging scenario. The wireless reverse charging scenario introduced in Figure 2 is just a few examples given for the convenience of understanding.

As shown in (a) of Figure 2, the wireless reverse charging scenario may include a mobile phone 121 and a watch 151. Among them, the mobile phone 121 can be used as a receiving end to receive the power in the wireless charging process, and can also be used as a transmitting end to wirelessly reverse charge the watch 151 after the wireless reverse charging function is turned on. At this time, the watch 151 is the wireless charging device during the wireless reverse charging process. Receiving end.

As shown in (b) of Figure 2 , the wireless reverse charging scenario may include a mobile phone 122 and an earphone charging box 152 . Among them, the mobile phone 122 can be used as a receiving end to receive the power in the wireless charging process, or can be used as a transmitting end to perform wireless reverse charging of the earphone charging box 152 after turning on the wireless reverse charging function. At this time, the earphone charging box 152 is a wireless reverse charging station. The receiving end during the charging process.

As shown in (c) of FIG. 2 , the wireless reverse charging scenario may include a first mobile phone 123 and a second mobile phone 153 . Among them, the first mobile phone 123 can be used as a receiving end to receive the power in the wireless charging process, or can be used as a transmitting end to wirelessly reverse charge the second mobile phone 153 after turning on the wireless reverse charging function. At this time, the second mobile phone 153 is wireless The receiving end during the reverse charging process.

As shown in (d) of FIG. 2 , the wireless reverse charging scenario may include the tablet 124 and the stylus 154 . Among them, the tablet computer 124 can be used as a receiving end to receive the power in the wireless charging process, or can be used as a transmitting end to wirelessly reverse charge the stylus 154 after turning on the wireless reverse charging function. At this time, the stylus 154 is wirelessly reverse charged. the receiving end of the process.

In (a) to (d) of Figure 2, the watch 151, the earphone charging box 152, the second mobile phone 153, and the stylus 154 may not have the wireless reverse charging function, or the wireless reverse charging function may not be turned on temporarily.

It should be understood that the embodiments of the present application do not limit the specific type of equipment in the wireless reverse charging scenario. For example, the power supply device (that is, an electronic device that turns on the wireless reverse charging function and wirelessly charges other devices) can be portable electronic devices such as mobile phones, tablets, and laptops. The power receiving device (that is, the electronic device wirelessly charged by the power supply device) can be, for example, a mobile phone, a bracelet, a watch, an earphone, a keyboard, a stylus, an electric toothbrush and other portable electronic devices.

In addition, it can be understood that the wireless reverse charging scenario is one of the wireless charging scenarios. Correspondingly, (a) to (d) in Figure 2 are actually specific examples 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 respectively the wireless charging systems shown in Figure 1. A specific example of the transmitting device 110, the watch 151, the earphone charging box 152, the second mobile phone 153, and the stylus 154 are respectively a specific example of the wireless charging receiving device 120 shown in Figure 1.

Figure 3 shows a schematic diagram of the wireless charging principle. As shown in Figure 3, the wireless charging scenario involves a transmitting end 210 (i.e., a power supply device) and a receiving end 220 (i.e., a power receiving device). Both the transmitting end 210 and the receiving end 220 have wireless charging capabilities to implement the transmitting end. 210 wireless charging process of 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 transmitter 210 can control the first battery 213 to output current to the first coil 211 (that is, the power output coil) through the first chip 212, so that the first coil 211 can emit a high-frequency magnetic field. That is to convert electrical signals into magnetic signals. The high-frequency magnetic field can pass through the second coil 221 (that is, the power receiving coil), causing an induced current to be generated on the second coil 221, that is, the magnetic signal is converted into an electrical signal. The second chip 222 can detect the induced current and input the induced current to the second battery 223 .

In some embodiments, the first chip 212 may include a transformer module and a transmitter circuit, where the transformer module is used to implement voltage conversion, and the transmitter circuit is used to convert direct current into an alternating current signal. Correspondingly, the first coil 211 is used to convert the alternating current signal into a magnetic signal and transmit it.

In some embodiments, the second chip 222 may include a transformer module and a receiving circuit. The second coil 221 is used to convert the magnetic signal into an alternating current signal, the receiving circuit is used to convert the alternating current signal into direct current, and the transformer module is used to implement voltage conversion.

Wireless charging equipment is favored by more and more users because of invisible charging, low equipment wear rate, high technical content, and easy operation. In order to attract customers, more and more manufacturers are investing in the development of wireless charging equipment and launching a variety of devices that support wireless charging, such as mobile phones, bracelets, watches and other portable devices with wireless charging functions. wait.

With the widespread application of wireless charging technology, users have also put forward higher requirements for wireless charging equipment, especially the charging efficiency of wireless charging equipment. Whether the position of the coil is aligned when the transmitter and receiver are coupled and charged is a key factor affecting the efficiency of wireless charging. At present, magnetic positioning technology is usually used to align the transmitter coil and the receiver coil. For example, a small magnet array is set outside the coil, and the attraction between the magnets is used to match the coil position. However, the current magnetic positioning technology still has the problem of inaccurate positioning, resulting in low charging efficiency and affecting user experience.

In view of this, embodiments of the present application provide a wireless charging module that can improve the positioning accuracy of the coil when the transmitting end and the receiving end are coupled for charging, thereby improving wireless charging efficiency.

Figure 4 shows a schematic structural diagram of a wireless charging module provided by an embodiment of the present application. (a) in FIG. 4 is a schematic top view of the wireless charging module 300, and (b) in FIG. 4 shows a partial three-dimensional schematic view of the wireless charging module 300.

As shown in (a) and (b) in Figure 4, the wireless charging module 300 includes a ring magnet 310 and a coil 320. The coil 320 is located inside the ring magnet 310, that is, the ring magnet 310 is disposed on the periphery of the coil 320. In other words, the inner ring of the ring magnet 310 surrounds the coil 320 . In the embodiment of the present application, the ring magnet 310 has an integrated 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 the ring magnet 320 and the side of the coil 320 close to the ring magnet 320 .

The wireless charging module 300 provided by the embodiment of the present application can be applied to the transmitting end and/or the receiving end. On the one hand, since the annular magnets arranged around the coil are integrally formed, compared with small magnet arrays, the magnetic leakage phenomenon is reduced, the magnetic field is better closed, and the magnetic attraction between the transmitting end and the receiving end can be improved, which can be more Accurately align the position of the wireless charging coupling coil to improve wireless charging efficiency. On the other hand, the integrated ring magnet is arranged on the periphery of the coil, which can form tight and closed magnetic lines, which will not have a great impact on the internal magnetic field of the wireless charging coil, and can also improve the wireless charging efficiency.

Moreover, the leakage magnetic field of the integrated ring magnet is small (that is, there is less magnetic leakage). On the premise that the wireless charging coil is not affected, the distance between the magnet and the coil (specifically, the inner ring of the magnet and the outer ring of the coil are within radial distance) can be reduced such that:

1) A coil with a larger diameter can be placed in the area formed by the inner ring of the magnet. The larger the coil diameter, the greater the induced current, which can improve the wireless charging capability; or,

2) The outer diameter of the magnet can be kept constant and the inner diameter can be made smaller to increase the volume of the magnet. The larger the magnet, the stronger the magnetic force, which can more accurately achieve the position alignment of the wireless charging coupling coil and improve the wireless charging efficiency; or,

3) The outer diameter and inner diameter of the magnet can be made smaller to reduce the volume of the magnet. Correspondingly, the radial size of the wireless charging module can be reduced, thereby saving the space occupied by the wireless charging module. When it is applied to a device to facilitate the miniaturization of wireless charging equipment; or,

4) The outer diameter of the magnet can be kept unchanged, the inner diameter can be made smaller, and the thickness can be made thinner. It can reduce the thickness size (or axial size) of the wireless charging module while ensuring the magnetic attraction, thereby saving money on the wireless charging module. The occupied space, when applied to the device, facilitates the thinning of the wireless charging device.

Of course, since the integrated annular magnet has less magnetic flux leakage and the magnetic field is better sealed, if the magnetic attraction force of the magnet is to reach a certain value without changing the radial size of the magnet, the integrated annular magnet provided in the embodiment of the present application The thickness of the magnets is also much thinner than the thickness of the small magnet array. This can not only accurately align the position of the wireless charging coupling coil, thereby improving the wireless charging efficiency, but also save the space occupied by the wireless charging module when applied to the device, which is conducive to making the wireless charging device lighter and thinner.

In addition, the integrated ring magnet is easy to process and assemble, which can improve processing efficiency and installation efficiency and help reduce costs.

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

When the ring magnet 310 is made of permanent magnet material, the wireless charging module 300 can be applied to the transmitter, such as a charging base, a vehicle-mounted device, a mobile charger, etc. that do not need to be carried around anytime and anywhere or will not be used at any time or the frequency of use. Low equipment. In this way, when users use different receiving ends, for example, when the positioning magnets in the receiving end are all soft magnetic materials, wireless charging can also be performed through the same transmitting end. In addition, users generally do not carry the transmitter with them, which can avoid the possible adverse effects of the ring magnet 310 in the transmitter on the magnetic stripe in the bank card or the magnetic sensors inside the electronic product such as a digital compass, magnetometer, etc.

When the ring magnet 310 is made of soft magnetic material, the wireless charging module 300 can be applied to the receiving end, such as mobile phones, tablets, watches, bracelets and other portable devices that users can use at any time or use frequently, so that This avoids possible adverse effects that the ring magnet 310 in the receiving end may have on the magnetic stripe in the bank card or the magnetic sensor inside the electronic product such as a digital compass, magnetometer, etc.

It can be understood that when the ring magnet 310 is made of permanent magnet material, the wireless charging module 300 can also be applied to the receiving end. When the ring magnet 310 is made of soft magnetic material, the wireless charging module 300 can also be applied to the transmitter. The embodiments of the present application do not limit this.

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

1) Alnico permanent magnet alloy material: It is mainly composed of iron, nickel, and aluminum elements, and also contains elements such as copper, cobalt, and titanium. It has high residual magnetism, low temperature coefficient, and stable magnetic properties;

2) Iron-chromium-cobalt permanent magnet alloy material: It is mainly composed of iron, chromium and cobalt elements, and also contains molybdenum and a small amount of titanium and silicon elements. It has good processing performance and can undergo cold and hot plastic deformation;

3) Ferrite permanent magnet materials: mainly include barium ferrite and strontium ferrite, which have high resistivity, large coercivity, do not contain precious metals such as nickel and cobalt, and have rich sources of raw materials;

4) Rare earth permanent magnet materials: mainly include rare earth cobalt permanent magnet materials and neodymium iron boron (NdFeB) permanent magnet materials. The former has a low temperature coefficient, stable magnetism, and high coercive force. The latter has residual magnetism, coercive force, and maximum magnetic energy. It has a higher volume than the former, is not brittle, and has better mechanical properties;

5) Composite material: It is composed of permanent magnetic material powder and plastic material as a binder. Because it contains a certain proportion of binder, it has good resistance to deformation. It is not easy to crack after deformation and does not affect the magnetic properties. Size It has high precision, good mechanical properties, good performance uniformity of each part of the magnet, and is easy to carry out radial orientation of the magnet and multi-pole magnetization.

For example, the permanent magnet material used in the ring magnet 310 may include bonded NdFeB, bonded ferrite, samarium cobalt (SmCo), AlNiCo (AlNiCo), sintered ferrite, and sintered NdFeB. At least one.

Bonded NdFeB is a permanent magnet material formed by uniformly mixing NdFeB powder with binders such as resin, plastic or low melting point metals. It can be made into various complex shapes through compression, extrusion or injection molding. Composite NdFeB permanent magnets. Since bonded NdFeB contains a certain proportion of binder, the ring magnet 310 made of this permanent magnet material has a certain degree of flexibility. Even if the thickness of the magnet is very thin, it will not crack and will not affect the strength of the magnet after deformation. Magnetic properties.

Bonded ferrite is a composite permanent magnet material formed by mixing ferrite powder without rubber or plastic. It can be made into various high-precision, complex-shaped permanent magnets through molding or injection molding. Since bonded ferrite contains a certain proportion of binder, the ring magnet 310 made of this permanent magnet material has a certain degree of flexibility. Even if the thickness of the magnet is very thin, it will not crack and will not affect the strength of the magnet after deformation. Magnetic properties.

Sintered NdFeB permanent magnets can be manufactured through powder metallurgy technology. Ring magnets made of this permanent magnet material have high coercive force, extremely high magnetic properties, good mechanical properties, and can be cut and processed into different shapes. and drilling.

Sintered ferrite permanent magnets can be manufactured through ceramic technology. The ring magnet 310 made of this permanent magnet material is cheap and has moderate magnetic properties and is widely used.

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

Alnico permanent magnet material has high magnetic flux density, stable temperature performance, and is easy to shape.

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

1) Pure iron and low carbon steel: high saturation magnetization, low price, and good processing performance;

2) Iron-silicon alloy materials: adding silicon to pure iron can eliminate the phenomenon that the magnetism of magnetic materials changes with use time;

3) Iron-aluminum alloy materials: have good soft magnetic properties, high magnetic permeability and resistivity, high hardness and good wear resistance;

4) Iron-silicon-aluminum alloy materials: high hardness, saturation magnetic induction intensity, magnetic permeability and resistivity;

5) Nickel-iron alloy materials: Through the proportion of alloying elements and appropriate processes, the magnetic properties can be controlled to obtain soft magnetic materials such as high magnetic permeability, constant magnetic permeability, and moment magnetism;

6) Iron-cobalt alloy materials: have high saturation magnetization and low resistivity;

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

8) Amorphous soft magnetic alloy material: also known as metallic glass or amorphous metal, it has high magnetic permeability and resistivity, small coercive force, is not sensitive to stress, and has no magnetocrystalline anisotropy caused by the crystal structure. It has the characteristics of corrosion resistance and high strength;

9) Ultra-microcrystalline soft magnetic alloy materials: generally composed of a crystalline phase smaller than about 50 nanometers and an amorphous grain boundary phase, also called nanocrystalline, with high magnetic permeability, low coercive force, small iron loss, and saturation It has the characteristics of high magnetic induction intensity and good stability.

For example, the soft magnetic material used in the ring magnet 310 may include at least one of iron (Fe), iron-nickel (FeNi), iron-silicon (FeSi), amorphous, and nanocrystalline.

The ring magnet 310 made of the above-mentioned soft magnetic materials has 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, greater magnetic force can be provided when the thickness of the ring magnet 310 is thin.

In the embodiment of the present application, the annular magnet 310 is annular, that is, a hollow closed shape. The annular magnet 310 can be, for example, a circular ring, a square ring, an elliptical ring, a triangular ring, etc. The specific shape of the annular magnet 310 is not specified in the embodiment of the present application. limited. In practical applications, the shape of the ring magnet 310 can be set according to actual needs. For ease of understanding, the embodiment provided by this application takes the annular magnet 310 as an example to illustrate, but it can be understood that this application is not limited thereto.

In some embodiments, the magnetization method of the ring magnet 310 may be single-pole magnetization or multi-pole magnetization.

Figure 5 shows a schematic diagram of the unipolar magnetization method provided by the embodiment of the present application. Taking the annular magnet 310 as an example, as shown in (a) in Figure 5 , the magnetizing direction of the annular magnet 310 can be radial magnetization, such as left N right S or left S right N; as shown in Figure 5 As shown in (b), the magnetization direction of the ring magnet 310 can be axial magnetization, such as up N and down S or up S and down N; as shown in (c) in Figure 5, the magnetization direction of the ring magnet 310 Can be magnetized for radiation, such as N inside and S outside or S inside and N outside.

Since radiation magnetization is also along the diameter direction of the annular magnet 310, in the embodiment of the present application, radiation magnetization can also be considered as a method of radial magnetization.

Figure 6 shows a schematic diagram of the multi-pole magnetization method provided by the embodiment of the present application. Taking the annular magnet 310 as an example, the three-dimensional schematic diagram and the top view schematic diagram of the annular magnet 310 are shown in (a) of Figure 6 . The magnetizing direction of the annular magnet 310 can be radial multi-pole magnetization, that is, the outer circumference and Multi-pole magnetization of the inner periphery; the three-dimensional schematic diagram and the top view of the annular magnet are shown in (b) in Figure 6. The magnetization direction of the annular magnet 310 can be axial multi-pole magnetization, that is, along the thickness direction of the annular magnet. Multi-pole magnetization.

In some embodiments, when the magnetization mode of the ring magnet 310 is multi-pole magnetization, the magnetization level is greater than or equal to 2.

In some embodiments, when the magnetization mode of the ring magnet 310 is multi-pole magnetization, the number of magnetization stages is less than or equal to 8.

For example, the number of magnetization stages of the ring magnet 310 may be an even number, such as 2, 4, 6 or 8.

In the embodiment of the present application, if the magnetization level of the ring magnet 310 is small, for example, 2 or 4, there are fewer positions for positioning between the transmitter and the receiver, and the combination of the transmitter and the receiver can be more regular. To make the charging process more beautiful. If the magnetization level of the annular magnet 310 is large, such as 6 or 8, there will be more positioning positions between the transmitting end and the receiving end, and there will be many positioning positions for the user to choose, which will facilitate the user's operation.

5 and 6 , in some embodiments, the magnetization level of the 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 magnetization level of the ring magnet 310 is a positive integer.

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

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

For example, when the wireless charging module including the ring magnet 310 is applied to larger devices, such as vehicles, charging bases, etc., the thickness of the ring magnet 310 can be designed to be larger, such as 0.5mm, 1mm, 2mm, 3mm. , 4mm, etc. This will not only affect the space setting of the entire device, but also allow larger coils or larger magnets to be arranged in sufficient space, thereby improving the charging capacity or charging efficiency of the device.

For example, when the wireless charging module including the ring magnet 310 is applied to smaller devices, such as mobile phones, watches, tablets, etc., the thickness of the ring magnet 310 can be designed to be smaller, such as 0.3mm, 0.4mm, 0.5 mm, etc., so as to ensure the charging capacity or charging efficiency of the device while adapting to the development trend of smaller and lighter devices.

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

In some embodiments, the gap between the inner ring of the ring magnet 310 and the coil 320 (specifically, the surface of the coil 320 close to the ring magnet 310) is greater than 0 and less than or equal to 2 mm, such as the gap is 0.5mm, 1mm, 1.5mm , 1.8mm, etc. The gap between the inner ring of the annular magnet 310 and the coil 320 is small, which is beneficial to saving space or increasing the diameter of the coil or the volume of the magnet in a certain space to improve the 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 can be comprehensively determined based on the designed charging power and the designed charging efficiency, in order to meet the requirements for charging power and charging efficiency at the same time.

In some embodiments, as shown in FIG. 7 , the wireless charging module 300 may also include a magnetically permeable sheet 330 , which is located in the inner ring area of the annular magnet 310 and is along the edge of the annular magnet 310 with the coil 320 . Axial stacking setup. By providing the magnetically permeable sheet 330, a high magnetic permeability channel can be provided for the coupling of the electromagnetic induction coil 320, increasing its magnetic flux, improving charging efficiency, and also preventing the alternating magnetic field of the electromagnetic induction coil from causing electromagnetic interference to other electronic components. Act as a shield.

In some embodiments, the magnetically permeable sheet 330 is made of soft magnetic material (such as a soft magnetic material with high magnetic permeability and low loss). For example, the magnetic conductive sheet 330 can be made of any of the following materials: pure iron, low carbon steel, iron-silicon alloy materials, iron-aluminum alloy materials, iron-silicon-aluminum alloy materials, nickel-iron alloy materials, iron-cobalt alloy materials System alloy materials, soft magnetic ferrite, amorphous soft magnetic alloy materials, ultra-microcrystalline soft magnetic alloy materials. As an example and not a limitation, the magnetically permeable sheet 330 may be made of at least one soft magnetic material selected from iron (Fe), iron-nickel (FeNi), iron-silicon (FeSi), amorphous, and nanocrystalline.

Figure 8 shows a schematic diagram of a wireless charging system provided by an embodiment of the present application.

As shown in Figure 8, the wireless charging system 400 includes a transmitting end 401 (which can also be called a first device) and a receiving end 402 (which can also be called a second device). The transmitting end 401 can transmit wirelessly to the receiving end 402. electricity. The transmitting end 401 may be a specific example of the wireless charging transmitting device 110 shown in FIG. 1 , and the receiving end 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, and the receiving end 402 includes a second wireless charging module 420. The transmitting end 401 can perform wireless charging for the receiving end 402 through the first wireless charging module 410 and the second wireless charging module 420. Charge. 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 introduced above.

For example, 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 charging base, and the receiving end 402 is a tablet, mobile phone, or watch; for another example, the transmitting end 401 is a mobile phone or tablet, and the receiving end 402 is a watch or bracelet; for another example, the transmitting end 401 and the receiving end are The terminals 402 are all mobile phones, all watches, all tablets, or all mobile chargers, etc. In some embodiments, when the transmitter 401 or the receiver 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 can be disposed on the casing of the corresponding device. superior.

Continuing to refer to Figure 8, the first wireless charging module 410 may include a first magnet 411 and a first coil 412. The first magnet 411 is annular, and the first coil 412 is located in an area surrounded by the inner ring of the first magnet 411. There is a gap 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. The second magnet 421 is annular, and the second coil 422 is located in an area surrounded by the inner ring of the second magnet 421. There is a gap between the inner ring and the second coil 422 . For example, the first coil 412 and the second coil 422 may be circles or rings with a smaller diameter, and the first magnet 411 and the second magnet 421 may be rings with a larger diameter. In this embodiment of the present application, the first magnet 411 and the second magnet 421 are used for focusing 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 have an integrated annular structure. That is, the first magnet 411 and/or the second magnet 421 is a specific example of the ring magnet 310 introduced above.

For example, both the first magnet 411 and the second magnet 421 are integrated annular structures, so the first magnet 411 can be the annular magnet 310 applied to the transmitting end 401, and the second magnet 421 can be the annular magnet 310 applied to the receiving end 402.

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

When equipment used for wireless charging, such as vehicles, wireless charging bases, etc., has relatively loose space requirements, the magnets surrounding the coil can be set as a magnet array. In this way, the material of the magnet can be sintered ferrite or sintered NdFeB, which can provide greater magnetic force than using bonded ferrite or bonded NdFeB.

When devices used for wireless charging, such as mobile phones, watches, etc., have strict space design requirements, the magnets surrounding the coils can be set into an integrated structure, which is beneficial to achieving thinner, lighter and smaller devices.

In this embodiment of the present application, the material of the first magnet 411 and/or the second magnet 421 is a permanent magnet material. In this way, the transmitting end 401 and the receiving end 402 can be attracted together through magnetic force. This enables coil alignment. In some embodiments, when one of the first magnet 411 and the second magnet 421 is made of a permanent magnetic material, the other one 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 mm and less than or equal to 1 mm, such as 0.3 mm, 0.5 mm, 0.7 mm, 0.9 mm, etc. This can ensure the charging capability or charging efficiency of the receiving end while adapting to the development trend of smaller and lighter devices.

In some embodiments, the thickness of the first magnet 411 is greater than or equal to 0.2 mm and less than or equal to 5 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, etc. In this way, the space arrangement of the entire transmitter can be not affected, and larger coils or larger magnets can be arranged in sufficient space, thereby improving the charging capacity or charging efficiency of the device.

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 to say, 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 range of the first magnet may be t, 2t, 3t, 4t. Correspondingly, the thickness of the first magnet 411 and the thickness of the second magnet 421 may be equal, or the thickness of the first magnet 411 may be equal to the thickness of the second magnet 411. The absolute value of the difference in thickness of the magnet 421 is 1, 2, or 3 times the thickness of the second magnet 421 .

In this way, the thickness difference of the two magnets is small, and the magnetic saturation degree of the two magnets is close, thereby avoiding the waste of magnet volume caused by the large thickness difference of the two magnets. Generally speaking, the thickness of the magnet in the receiving end is generally set smaller due to space constraints. The transmitting end has relatively loose requirements for space arrangement, and the setting of the magnet thickness can be more flexible. Therefore, in practical applications, in order to make the transmitting end and The magnetic saturation degree of the magnet in the receiving end is close, and the thickness of the magnet in the transmitting 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 magnetization level of the first magnet 411 is greater than or equal to 1 and less than or equal to 8, and the magnetization level of the second magnet 421 is greater than or equal to 1 and less than or equal to 8.

In the embodiment of the present application, the first magnet 411 and the second magnet 421 may be single-pole magnetized or multi-polar magnetized.

In some embodiments, if the magnetization direction (or magnetization method) of the first magnet 411 and the second magnet 421 is axial magnetization, as shown in (a) of FIG. 9 , when the first magnet 411 and the second magnet 421 are axially magnetized, When the second magnet 421 is magnetically attracted, the magnetizing directions of the first magnet 411 and the second magnet 421 are the same. For example, (b) in Figure 9 takes the cross-section parallel to the plane where L1 and L2 are located and the cross-section parallel to the plane where L3 and L4 are located respectively as examples, showing a schematic diagram of the distribution of magnetic field lines in the case of axial magnetization. It can be It can be seen that a tightly closed loop is formed between the first magnet 411 and the second magnet 421, which increases the magnetic attraction force between the first magnet 411 and the second magnet 421. In addition, the tightly closed loop has less magnetic flux leakage, and the impact on other components in the transmitting end 401 and the receiving end 402 is greatly reduced.

As an example and not a 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 mobile phone, a tablet, a watch, or a mobile charger. Usually two devices of the same type are close in size, and correspondingly, the dimensions of the magnets each includes (eg, inner and outer diameters) are also close. In this way, the magnetization mode of the two magnets is set to axial magnetization and the magnetization direction is the same, so that the magnetic attraction between the two devices can be achieved.

In some embodiments, if the magnetization direction (or magnetization method) of the first magnet 411 and the second magnet 421 is radial magnetization, as shown in (a) to (c) in Figure 10, when the 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 magnetization direction of the first magnet 411 and the second magnet 421 when their sizes are close. As shown in (a) of FIG. 10 , the first magnet 411 and the second magnet 421 are arranged oppositely in the thickness direction (or axial direction) of the magnets, where the projection of the first magnet 411 in the thickness direction is the same as that of the second magnet. The projections of 421 in the thickness direction overlap. For example, the inner diameter of the first magnet 411 is less than or equal to the inner diameter of the second magnet 421 and the outer diameter of the first magnet 411 is greater than the inner diameter of the second magnet 421 , or the inner diameter of the first magnet 411 is greater than the inner diameter of the second magnet 421 and less than the inner diameter of the second magnet 421 . The outer diameter of the second magnet 421, or the inner diameter of the second magnet 421 is less than or equal to the inner diameter of the first magnet 411 and the outer diameter of the second magnet 421 is greater than the inner diameter of the first magnet 411, or the inner diameter of the second magnet 421 is greater than the first magnet The inner diameter of the first magnet 411 is 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 mainly pass through the end surface of the first magnet 411 toward the second magnet 421 and the third The two magnets 421 attract towards the end surface of the first magnet 411. At this time, the magnetizing directions of the first magnet 411 and the second magnet 421 are opposite.

As an example and not a 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 mobile phone, a tablet, a watch, or a mobile charger. Usually two devices of the same type are close in size, and correspondingly, the dimensions of the magnets each includes (eg, inner and outer diameters) are also close. In this way, the magnetization mode of the two magnets is set to radial magnetization and the magnetization directions are opposite, so that the magnetic attraction between the two devices can be achieved.

As another example, (c) and (e) in FIG. 10 show schematic diagrams of the magnetization directions of the first magnet 411 and the second magnet 421 when the size difference is large. As shown in (c) and (e) in Figure 10 , the first magnet 411 and the second magnet 421 are arranged oppositely in the thickness direction (or axial direction) of the magnet, where the projection of the first magnet 411 in the thickness direction There is no overlap with the projection of the second magnet 421 in the thickness direction. For example, as shown in (c) of FIG. 10 , the inner diameter of the first magnet 411 is greater 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 and the second magnet 421 are magnetically attracted, as shown in (d) in FIG. 10 , the first magnet 411 and the second magnet 421 mainly pass through the first magnet 411 toward the inner ring surface of the second magnet 421 And the second magnet 421 attracts towards the outer ring surface of the first magnet 411, or as shown in (f) in FIG. The outer ring surface and the second magnet 421 attract toward the inner ring surface of the first magnet 411. At this time, the magnetization directions of the first magnet 411 and the second magnet 421 are the same.

As an example and not a limitation, the device provided with the first magnet 411 and the device provided with the second magnet 421 are of different types, such as one device is a mobile phone, the other device is a watch (or bracelet), or one device is a tablet, Another device is a mobile phone (or watch, bracelet), or one device is a mobile phone charging base, another device is a watch, and so on. Usually the sizes of two different types of equipment are quite different, and accordingly, the sizes of the magnets they include (such as the inner diameter and outer diameter) are also quite different. In this way, the magnetization mode of the two magnets is set to radial magnetization and the magnetization direction is the same, so that the magnetic attraction between the two devices can be achieved.

For example, (b), (d) and (f) in Figure 10 take the cross-section parallel to the plane where L1 and L2 are located and the cross-section parallel to the plane where L3 and L4 are located as examples, respectively showing the Schematic diagram of magnetic field line distribution under radial magnetization in the charging scenarios shown in (a), (c), and (e). It can be seen that a tightly closed loop is formed between the first magnet 411 and the second magnet 421. In a certain size space, the volume of the magnet that can be utilized increases, thereby increasing the distance between the first magnet 411 and the second magnet 421. The magnetic attraction between them. In addition, the tightly closed loop has less magnetic flux leakage, and the impact 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 two-pole magnets as an example, when the first magnet 411 or the second magnet 421 is cut along the plane where L1 and L2 are located, at least a part of the two parts are in a separated state. The number of magnetized poles is 1. When the first magnet 411 or the second magnet 421 is cut along the plane where L3 and L4 are located, the number of magnetized poles of any part of the two parts in the separated state is 2.

In the embodiment of the present application, in order to achieve wireless charging, the transmitter and the receiver are generally stacked. Correspondingly, in the charging state, the first magnet 411 located in the transmitter and the second magnet 421 located in the receiver are also stacked. or relative settings. The axial direction of the first magnet 411 is parallel to the axial direction of the second magnet 421 , or in other words, 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 thickness direction) of the magnets.

In addition, it should be noted that the radial direction in this application can be understood as a direction perpendicular to the thickness direction. The above-mentioned outer diameter can be understood as the distance between two points when a line perpendicular to the thickness direction of the ring magnet and passing through the center of the ring magnet intersects with the outer ring surface of the ring magnet. The above-mentioned inner diameter can be understood as the distance between two points when a line perpendicular to the thickness direction of the ring magnet and passing through the center of the ring magnet intersects the inner ring 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 can be received in a first accommodation 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 can be received in a second accommodation space formed by the second housing. The first housing may be provided with a first connection part, the second housing may be provided with a second connection part, and the first housing and the second housing may be snap-connected through the first connection part and the second connection part. In this way, the receiving end 401 and the transmitting end 402 can be more stably fit together through the snap connection.

In some embodiments, the transmitting end 401 can also charge the receiving end 402 through wired means or contact means. At this time, the first magnet 411 provided in the transmitting end 401 and the second magnet 421 provided in the receiving end 402 can play a role. The function of magnetic fixation is that the transmitting end 401 and the receiving end 402 are fixed by the 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 can be fixed, which facilitates charging. Of course, in some other embodiments, the transmitting end 401 and the receiving end 402 can be charged only through wired or contact means, so that the transmitting end 401 can include the first magnet 411 but not the first coil 412, and the receiving end 402 The second magnet 421 may be included instead of the second coil 422. Similarly, the first magnet 411 provided in the transmitting end 401 and the second magnet 421 provided in the receiving end 402 may play a role in magnetic fixation to facilitate charging.

In some embodiments, if the receiving end 402 has a wireless reverse charging function, the magnetization method of the first magnet 411 and the second magnet 422 can be designed as multi-pole magnetization. In this way, the magnetic attraction positioning when the receiving end 402 receives the power wirelessly transmitted by the transmitting end 401 can be realized, and the magnetic attraction positioning when the receiving end 402 serves as the transmitting end and wirelessly transmits power to another receiving end can be realized. The following is an example with reference to the accompanying drawings.

Figure 11 shows a schematic diagram of the magnetic attraction positioning of radial multi-pole magnetization for wireless reverse charging provided by the embodiment of the present application.

Taking the magnet in the transmitting end and the magnet in the receiving end as radial 2-pole magnets as an example, as shown in Figure 11, the first magnet 411 in the transmitting end 401 may include a first part 411a and a second part 411b. The magnetization direction of the first part 411a is opposite to the magnetization direction of the second part 411b. For example, the magnetization direction of the first part 411a is from the inner ring (N pole) to the outer ring (S pole). The magnetization direction of the second part 411b is The direction is from the outer ring (N pole) to the inner ring (S pole).

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

When the transmitting end 401 performs wireless charging to the receiving end 402, the position of the first part 411a of the first magnet 411 corresponds to the position of the third part 421a of the second magnet 421, and the position of the second part 411b of the first magnet 411 corresponds to the position of the third part 411a of the first magnet 411. The positions of the fourth portion 421b of the two magnets 421 correspond to each other. Since the magnetization direction of the first part 411a is opposite to the magnetization direction of the third part 421a, and the magnetization direction of the second part 411b is opposite to the magnetization direction of the fourth part 421b, the first part 411a and the third part 421a are magnetically attracted. , the second part 411b and the fourth part 421b are magnetically attracted, so the first magnet 411 and the second magnet 421 are magnetically attracted, realizing the magnetic attraction positioning between the transmitting end 401 and the receiving end 402.

The receiving end 402 has a wireless reverse charging function. For example, it can wirelessly transmit power to the receiving end 403 (which can also be called 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 introduced previously.

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

When the receiving end 402 (at this time the role of the receiving end 402 is a wireless charging transmitting device) performs wireless charging to the receiving end 403, the position of the fourth part 421b of the second magnet 421 and the position of the fifth part 431a of the third magnet 431 Correspondingly, the position of the third part 421a of the second magnet 421 corresponds to the position of the sixth part 431b of the third magnet 431. Since the magnetization direction of the fourth part 421b is opposite to the magnetization direction of the fifth part 431a, the third part The magnetization direction of 421a is opposite to the magnetization direction of the sixth part 431b, so the fourth part 421b and the fifth part 431a are magnetically attracted, and the third part 421a and the sixth part 431b are magnetically attracted, so the second magnet 421 and the fifth part 431b are magnetically attracted. The three magnets 431 are magnetically attracted to realize the magnetic attraction and positioning between the receiving end 402 and the receiving end 403.

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 and the receiving end 402 is rotated 180 degrees, the magnetic attraction positioning between the receiving end 402 and the transmitting end 401 can be easily achieved or The magnetic attraction between the receiving end 402 and the receiving end 403 is positioned.

Figure 12 shows a schematic diagram of the magnetic attraction positioning of axial multi-pole magnetization for wireless reverse charging provided by the embodiment of the present application.

Taking the magnet in the transmitting end and the magnet in the receiving end as an example of axial 2-pole magnetization, as shown in Figure 12, the first magnet 411 in the transmitting end 401 may include a first part 411a and a second part 411b. The magnetization direction of the first part 411a is opposite to the magnetization direction of the second part 411b. For example, the magnetization direction of the first part 411a is pointing in the direction of the paper, and the magnetization direction of the second part 411b is pointing outside the paper.

The second magnet 421 in the receiving end 402 may include a third part 421a and a fourth part 421b. The magnetization direction of the third part 421a is opposite to the magnetization direction of the fourth part 421b. For example, the magnetization direction of the third part 421a is The magnetization direction of the fourth part 421b is pointing in the direction outside the paper surface.

When the transmitting end 401 performs wireless charging to the receiving end 402, the position of the first part 411a of the first magnet 411 corresponds to the position of the third part 421a of the second magnet 421, and the position of the second part 411b of the first magnet 411 corresponds to the position of the third part 411a of the first magnet 411. The positions of the fourth portion 421b of the two magnets 421 correspond to each other. Since the magnetization direction of the first part 411a is opposite to the magnetization direction of the third part 421a, and the magnetization direction of the second part 411b is opposite to the magnetization direction of the fourth part 421b, the first part 411a and the third part 421a are magnetically attracted. , the second part 411b and the fourth part 421b are magnetically attracted, so the first magnet 411 and the second magnet 421 are magnetically attracted, realizing the magnetic attraction positioning between the transmitting end 401 and the receiving end 402.

The receiving end 402 has a wireless reverse charging function, for example, it can wirelessly transmit power to 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 introduced previously.

The third magnet 431 in the receiving end 403 may include a fifth part 431a and a sixth part 431b. The magnetization direction of the fifth part 431a is opposite to the magnetization direction of the sixth part 431b. For example, the magnetization direction of the fifth part 431a is The magnetization direction of the sixth part 431b is pointing in the direction outside the paper surface.

When the receiving end 402 (at this time the role of the receiving end 402 is a wireless charging transmitting device) performs wireless charging to the receiving end 403, the position of the fourth part 421b of the second magnet 421 and the position of the fifth part 431a of the third magnet 431 Correspondingly, the position of the third part 421a of the second magnet 421 corresponds to the position of the sixth part 431b of the third magnet 431. Since the magnetization direction of the fourth part 421b is opposite to the magnetization direction of the fifth part 431a, the third part The magnetization direction of 421a is opposite to the magnetization direction of the sixth part 431b, so the fourth part 421b and the fifth part 431a are magnetically attracted, and the third part 421a and the sixth part 431b are magnetically attracted, so the second magnet 421 and the fifth part 431b are magnetically attracted. The three magnets 431 are magnetically attracted to realize the magnetic attraction and positioning between the receiving end 402 and the receiving end 403.

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 and the receiving end 402 is rotated 180 degrees, the magnetic attraction positioning between the receiving end 402 and the transmitting end 401 can be easily achieved or The magnetic attraction between the receiving end 402 and the receiving end 403 is positioned.

It can be understood that the scenario in which multi-pole magnetization is applied to wireless reverse charging is introduced above with reference to Figures 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 can also be 4-pole magnetized, 6-pole magnetized, or 8-pole magnetized. Correspondingly, when the receiving end 402 is used for wireless feedback, When charging, the receiving end 402 can be realized by odd multiples of 90 degrees (corresponding to 4-pole magnetization), odd multiples of 60 degrees (corresponding to 6-pole magnetization), or odd multiples of 45 degrees (corresponding to 8-pole magnetization). The magnetic attraction positioning between the receiving end 403 and the receiving end 403.

To sum up, in some embodiments, the transmitting end 401 can wirelessly charge the receiving end 402 and the receiving end 403 wirelessly, and the receiving end 402 has a wireless reverse charging function and can wirelessly charge the receiving end 403 . When the transmitting end 401 wirelessly charges the receiving end 402, the first magnet 411 and the second magnet 421 are attracted, and the angle between the transmitting end 401 and the receiving end 402 is the first angle. When the transmitting end 401 wirelessly charges the receiving end 403, the first magnet 411 and the third magnet 431 are attracted, and the angle between the transmitting end 401 and the receiving end 403 is also the first angle. When the receiving end 402 wirelessly charges the receiving end 403, the second magnet 421 and the third magnet 431 are attracted, and the angle between the receiving end 402 and the receiving end 403 is the second angle, and the second angle is the same as the first angle. The difference between them is an odd multiple of 360°/N, and N is the magnetization level of the second magnet 421.

Here, the angle between the transmitting end 401 and the receiving end 402 can be specifically the angle between the first reference axis of the transmitting end 401 and the second reference axis of the receiving end 402; the angle between the transmitting end 401 and the receiving end 403 The included angle may be specifically the angle between the first reference axis of the transmitting end 401 and the third reference axis of the receiving end 403; the included angle between the receiving end 402 and the receiving end 403 may be specifically the second reference axis of the receiving end 402. The angle between the axis and the 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 user's eyes when using the transmitting end 401 forward, and the second reference axis may be perpendicular to the thickness of the second magnet 421 direction and perpendicular to the axis connecting the eyes when the user is using the receiving end 402 in the forward direction. The third reference axis may be perpendicular to the thickness direction of the third magnet 431 and perpendicular to the line connecting the eyes when the user is using the receiving end 403 in the forward direction. direction axis.

When the receiving end 402 is used for wireless reverse charging, it can be rotated by odd multiples of (360°/magnetization level) to achieve magnetic alignment between the receiving end and the receiving end to support wireless reverse charging of the receiving end.

With the popularity of vehicles, cars have become an indispensable means of transportation in people's daily lives. However, vehicles have long development cycles and slow update iterations, making it difficult to meet the diverse and personalized needs of consumers. Consumer electronics such as mobile phones and watches are convenient for consumers to carry around. Due to their short life cycles and fast update iterations, they can adapt to rapidly changing scene needs. Therefore, the ecological integration of the consumer electronics industry and the automotive industry is imperative. In the embodiment of the present application, the above-mentioned wireless charging module can be applied in vehicles, which is conducive to promoting the practice of putting consumer electronic products in vehicles.

In some embodiments, the wireless charging module provided by the embodiments of the present application can be installed in at least one of the vehicle's console, seat back, door armrest, central armrest, door interior panel, and trunk, which can be convenient Users charge on-board ecological equipment through this wireless charging module. In the embodiment of the present application, when the wireless charging module is installed in a vehicle, the wireless charging module can be electrically connected to the power supply circuit in the vehicle, and the energy source of the wireless charging module is the vehicle. In other words, the wireless charging module obtains energy from the vehicle's power supply circuit and can wirelessly charge other devices.

In some embodiments, the wireless charging module provided by the embodiments of the present application can be fixedly installed in the vehicle as a front-mounted accessory. That is, the wireless charging module has been built into the vehicle as a front-mounted accessory before the vehicle leaves the factory. In this way, the vehicle can charge the on-board ecological equipment without using exposed wires or charging interfaces, which can improve the appearance and help meet the personalized and diverse scene needs of users.

In other embodiments, the wireless charging module provided by the embodiments of the present application is installed in the vehicle through a detachable connection structure. For example, the wireless charging module is installed in the vehicle through clamps, buckles, threads, Velcro straps, etc. . This makes it convenient for users to use the wireless charging module to charge on-board ecological equipment at different locations in the vehicle. In some embodiments, the wireless charging module can be electrically connected to the charging interface on the vehicle through a charging connector or through contacts.

Figure 13 shows a schematic diagram of the wireless charging module provided by the embodiment of the present application being applied to a vehicle.

In some embodiments, the wireless charging module 300 or the first wireless charging module 410 provided by the present application can be built-in when the vehicle 160 is installed in the front. For example, as shown in FIG. 13 , the device provided by the embodiment of the present application can be built into the control panel (or instrument panel), seat back, door armrest, center armrest, door interior panel, trunk, etc. of the vehicle 160 wireless charging module. For example, the built-in wireless charging module in the console can be used to wirelessly charge smart ornaments; the built-in wireless charging module in the seat back can be used to wirelessly charge care cameras, tablets, mobile phones and other devices; the built-in wireless charging module in the door armrest The charging module can be used to wirelessly charge children's story machines, mobile phones, watches and other devices; the built-in wireless charging module in the center armrest can be used to wirelessly charge game controllers, mobile phones, etc.; the built-in wireless charging module in the trunk can be used to wirelessly charge Wireless charging for outdoor lighting equipment, car vacuum cleaners, etc.

In other embodiments, the wireless charging module 300 or the first wireless charging module 410 provided in this application can be detachably connected to components in the vehicle 160 . For example, as shown in Figure 13, the present application can be detachably connected to the console (or instrument panel), seat back, door armrest, central armrest, door interior panel, trunk, etc. of the vehicle 160 The wireless charging module provided by the embodiment. For example, when users need to wirelessly charge smart ornaments, the wireless charging module can be connected to the console; when users need to wirelessly charge care cameras, tablets, mobile phones and other devices, the wireless charging module can be connected to the seat. on the back; when users need to wirelessly charge children's story machines, mobile phones, watches and other devices, the wireless charging module can be connected to the handrails inside the door; when users need to wirelessly charge game controllers, mobile phones, etc., the wireless charging module can The module is connected to the central armrest; when users need to wirelessly charge outdoor lighting equipment, car vacuum cleaners, etc., the wireless charging module can be connected to the trunk.

As an example and not a limitation, the wireless charging module can be installed in the vehicle 160 through a detachable connection structure, which can improve charging flexibility. Figure 14 shows a schematic assembly diagram of the wireless charging module and the detachable connection structure provided by the 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 rotationally connected, which is not limited in the embodiments of the present application.

In some embodiments, the detachable connection structure 510 and the components on the vehicle 160 can be snap-fit, threaded, clamped, adhesive-tape-buckle connected, etc., which are not limited in the embodiments of the present application.

In the embodiment of the present application, the magnetic suction method is used to fix consumer electronic products, which can avoid the problem of unstable fixation of on-board ecological equipment during the movement of the vehicle, and reduce or avoid abnormal noises during driving. In addition, the vehicle can wirelessly charge the on-board ecological equipment, which solves many pain points in the use of on-board ecological equipment caused by the different types and locations of power supply ports in existing vehicles. In addition, the vehicle wirelessly supplies power to the on-board ecological equipment, which can unify the power supply method without exposing wires or charging interfaces, improving the appearance. When users use the wireless charging module in the vehicle to charge the on-board ecological equipment, automatic connection and minimalist connection can be achieved, and the user experience is comfortable.

Of course, in some other embodiments, the wireless charging module installed in the vehicle 160 may have its own energy source, that is, the wireless charging module is only mechanically connected to the vehicle 160 but not electrically connected to the circuit of the vehicle 160 .

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

As shown in FIG. 15 , the wireless charging module 610 may include an annular magnet 611 , a coil 612 and a housing 613 . The housing 613 is formed with a cavity for accommodating the annular magnet 611 and the coil 612 . For the introduction of the ring magnet 611 and the coil 612, please refer to the related descriptions of the ring magnet 310, the coil 320, the first magnet 411, and the first coil 412 in the previous embodiments. For the sake of simplicity, they will not be described again here.

In some embodiments, referring to FIG. 15 , an auxiliary fixing part 614 is provided on the housing 613 , and the auxiliary fixing part 614 can assist in fixing the transmitting end and the receiving end. For example, the auxiliary fixing part 614 can be an elastic claw, a buckle, a snap-on buckle, etc.

An auxiliary fixing part is provided on the wireless charging module to assist in fixing the receiving end, so that even if the receiving end is large in size (or weight) and the direction of attraction between the receiving end and the transmitting end does not coincide with the direction of gravity of the receiving end (for example, vertically) ), vehicle acceleration and deceleration, etc., it can also stabilize the receiving end, reduce the movement of the receiving end relative to the transmitting end, and improve charging efficiency.

The above description introduces that the wireless charging module provided by the embodiment of the present application can be applied to vehicles, so that the vehicle can wirelessly charge the on-board ecological equipment fixed in the vehicle through magnetic attraction. In some other embodiments, magnets (such as ring magnets (such as ring magnet 310) or magnet arrays provided in embodiments of the present application) can be used alone in vehicles to achieve magnetic-assisted fixation of vehicle-mounted ecological equipment. In this case, the vehicle may or may not have the ability to charge the on-board ecological equipment; when the vehicle can charge the on-board ecological equipment, the vehicle can charge the on-board ecological equipment through wired, wireless or contact methods. charging in at least one way.

For example, magnet A can be built into the vehicle or installed in the vehicle through a detachable connection structure, and the vehicle-mounted ecological equipment is provided with magnet B (for example, the magnet B can be provided on the shell of the vehicle-mounted ecological equipment or on the protective cover of the vehicle-mounted ecological equipment) (above), where the magnet A in the vehicle and the magnet B in the on-board ecological equipment are the male end and the female end respectively. The on-board ecological equipment and the components in the vehicle are fixed by the magnetic attraction between the male end and the female end. If the vehicle can charge the on-board ecological equipment, the vehicle can charge the on-board ecological equipment through any of wired, wireless, and contact methods. For example, when the vehicle charges the vehicle-mounted ecological equipment through a wired method, the vehicle-mounted ecological equipment and the vehicle are respectively provided with charging interfaces, and the electrical connection between the vehicle and the vehicle-mounted ecological equipment can be realized through the connecting wire. When the vehicle charges the vehicle-mounted ecological equipment wirelessly, coils are provided on the vehicle-mounted ecological equipment and the vehicle respectively, and energy transmission between the vehicle and the vehicle-mounted ecological equipment can be achieved through the coupling of the coils. When the vehicle charges the vehicle-mounted ecological equipment through contacts, the vehicle-mounted ecological equipment and the vehicle are respectively provided with contacts, and the electrical connection between the vehicle and the vehicle-mounted ecological equipment can be realized through the contact of the contacts.

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

For example, when the vehicle detects that the magnetic attraction between the wireless charging module and the vehicle-mounted ecological equipment is greater than the preset value, it can trigger an event to charge the vehicle-mounted ecological equipment; when it detects that the magnetic attraction between the wireless charging module and the vehicle-mounted ecological equipment When the magnetic attraction force is less than the preset value, an event can be triggered to stop charging the on-board ecological device.

For another example, when the vehicle detects that the magnetic attraction between the wireless charging module and the on-board ecological equipment is greater than the preset value, it can confirm that the user has entered the vehicle and trigger the door lock operation.

For another example, the vehicle can determine whether the on-board ecological equipment is connected to the vehicle through changes in magnetic strength. When the vehicle detects that the magnetic attraction between the wireless charging module and the on-board ecological equipment is greater than the preset value, an automatic connection event can be triggered.

As an example and not a limitation, FIG. 16 shows a schematic flow chart in which the vehicle triggers an automatic connection event according to the magnetic strength. The method shown in FIG. 16 may be executed by the vehicle, specifically, by a computing platform in the vehicle, which may include at least one processor. As shown in Figure 16, the method may include steps S701 to S706.

S701, the vehicle determines the basic magnetic field strength.

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

S702, the vehicle determines changes in magnetic field intensity.

When the vehicle-mounted ecological equipment is close to the magnets installed in the vehicle, the magnets in the vehicle-mounted ecological equipment and the magnets in the vehicle generate magnetic attraction, and the vehicle can detect changes in the magnetic field strength, such as the continuous strengthening of the magnetic field.

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

If not, the vehicle repeats steps S701 and S702.

If yes, continue to step S704.

S704, the vehicle starts Bluetooth connection.

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

S706, the vehicle responds to the Bluetooth connection request, such as sending a confirmation to connect to Bluetooth.

In some embodiments, step S701 and step S702 may be replaced by step: detecting magnetic field intensity.

Through magnetic judgment, the vehicle can automatically initiate connection confirmation.

In other embodiments, the method shown in Figure 16 can also be executed by a vehicle-mounted ecological device, that is, the vehicle-mounted ecological device can detect the magnetic field intensity and automatically initiate a Bluetooth connection when the magnetic field intensity is greater than a preset value.

Figure 17 shows a schematic structural block diagram of a wireless charging system provided by an embodiment of the present application. As shown in Figure 17, the wireless charging system may include a vehicle-mounted connector 810 and a vehicle-mounted ecological device 820. The vehicle-mounted connector 810 is provided in a vehicle (such as the aforementioned vehicle 160). The vehicle-mounted ecological device 820 may be a portable electronic device, such as a mobile phone, Tablets, watches, bracelets, mobile chargers, etc.

The vehicle-mounted 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 vehicle-mounted 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 the annular magnets or magnet arrays mentioned in the previous embodiments. A magnetic attraction force can be generated between the first matching unit 811 and the second matching unit 821 to magnetically fix the vehicle-mounted ecological device 820 and the vehicle-mounted connector 810 together.

The first coil 812 and the second coil 822 are coupled coils, such as the coils introduced in the previous embodiments. Energy can be transmitted wirelessly between the first coil 812 and the second coil 822 to realize wireless charging of the vehicle-mounted ecological device 820 by the vehicle.

The first calculation unit 814 can control the first wireless charging circuit 813 to input 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 can be connected to the battery 826 to input the received current into the battery 826 to store electrical energy.

The storage unit 827 is used to store computer program instructions, and the second computing unit 824 can call and execute the instructions in the storage unit 827 to implement corresponding functions.

In some embodiments, the first computing unit 814 can control the first communication module 815 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 . Initiate a Bluetooth connection request.

In other embodiments, the second calculation unit 824 can control the second communication module 825 to send the signal to the first communication module according to the magnitude of the magnetic attraction (or magnetic field strength) between the first matching unit 811 and the second matching unit 821 . 815 initiates a Bluetooth connection request.

In some embodiments, when the vehicle detects that the wireless charging module is charging the on-board ecological equipment, the charging status information of at least one power receiving device being charged (that is, the on-board ecological equipment) can be displayed on the central control screen. Exemplarily, the charging status information of the power receiving device may include at least one of the following: the current power of the power receiving device, charging voltage, total battery capacity, (input) charging current, charging input power, charging internal resistance, charging temperature, battery Health status, number of charge and discharge cycles, wireless charging energy efficiency ratio, device logo, device icon.

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

In some embodiments, when the vehicle detects that the wireless charging module is charging the on-board ecological equipment, the charging estimate information can be displayed on the central control screen. For example, the charging estimate information may include at least one of an estimated charging time and an estimated power consumption.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (29)

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 any one of the following permanent magnetic materials:

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

or,

the ring magnet is made of any 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. A wireless charging module according to any one of claims 1 to 3, wherein the number of magnetization stages of the ring magnet is greater than or equal to 1 and less than or equal to 8.

7. A wireless charging module according to any one of claims 1 to 3, wherein the direction of magnetization of the ring magnet is axial multipole magnetization or radial multipole magnetization.

8. A wireless charging module according to any one of claims 1 to 3, wherein the wireless charging module is provided 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 of claim 8, wherein the wireless charging module comprises,

the wireless charging module is fixedly arranged in the vehicle as a front mounting piece; or,

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,

the wireless charging module is fixedly arranged in the vehicle as a front mounting piece; or,

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

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 any 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, 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 any one of the following materials:

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 15-18, 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 18, 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 15-18, 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,

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 18, 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 18, 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, wherein the first device is a vehicle and the second device and the third device 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,

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 15-18, 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.