CN213661283U - Wireless auxiliary device that charges, wireless electric energy transmission external member and furniture - Google Patents

Abstract

The embodiment of the utility model discloses wireless auxiliary device, wireless electric energy transmission external member and furniture that charge. The embodiment of the utility model provides a through setting up the ferromagnetic sheet metal that one surrounds or the part surrounds the region that corresponds with the electric energy receiving coil size, the magnetic adsorption through ferromagnetic sheet metal sets up the magnet device around electric energy receiving coil, and from this, ferromagnetic sheet metal can strengthen the adsorption affinity effectively, realizes the accurate location of radio energy transmitting terminal and radio energy receiving terminal.

Description

Wireless auxiliary device that charges, wireless electric energy transmission external member and furniture

Technical Field

The utility model relates to a power electronic technology field, concretely relates to wireless auxiliary device, wireless power transmission external member and the application of charging the furniture of device.

Background

With the development of power electronic technology, wireless charging modules are increasingly miniaturized, which enables more and more portable devices, such as smart phones, to be loaded with wireless charging modules. This allows the user to conveniently charge the portable device in a non-contact manner.

In a typical wireless charging system, a wireless power transmitting terminal has one or more power transmitting coils, and a wireless power receiving terminal generally has a power receiving coil. Only when the power receiving coil is well coupled with the wireless power transmitting coil, the wireless charging system can obtain ideal charging efficiency. And under the condition that the electric energy receiving coil and the electric energy transmitting coil are aligned with each other, the electric energy receiving coil and the electric energy transmitting coil can obtain better coupling. However, since the power transmitting coil and the power receiving coil are usually accommodated in the housing of the device, how to conveniently align the user with the wireless power transmitting end and the wireless power receiving end is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a wireless auxiliary device that charges, wireless power transmission external member and furniture to solve the problem of wireless power transmitting terminal and the mutual alignment location of wireless power receiving terminal.

In a first aspect, a wireless charging auxiliary device is provided for assisting a wireless power receiving end and a wireless power transmitting end to locate each other, and the wireless charging auxiliary device only includes:

at least one ferromagnetic metal sheet disposed around a center so as to completely or partially enclose an area having a size greater than or equal to a size of a power receiving coil of the wireless power receiving terminal.

Further, the overall shape of the at least one ferromagnetic metal sheet is the same as or similar to the shape of the positioning magnet disposed in the wireless power receiving end.

Further, the back of the ferromagnetic metal sheet is provided with an adhesive layer for fixing the ferromagnetic metal sheet to a charging surface.

Further, the upper surface of ferromagnetic metal piece is provided with at least one decorative layer, sets up on the ferromagnetic metal piece to make the surface of wireless auxiliary device that charges have the different colour and/or line of surface with charge.

Further, the at least one ferromagnetic metal sheet is an annular ferromagnetic metal sheet surrounding the circular region; or

The at least one ferromagnetic metal sheet is a plurality of ferromagnetic metal sheets which are arranged at intervals to surround the region; or

The at least one ferromagnetic metal sheet is a sector annular ferromagnetic metal sheet partially surrounding the circular area; or

The at least one ferromagnetic metal sheet is a plurality of annular ferromagnetic metal sheets concentrically arranged around the center of the region, and the annular ferromagnetic metal sheets have gaps along the radial direction; or

The at least one ferromagnetic metal sheet comprises a plurality of metal sheet groups, each metal sheet group comprises a plurality of ferromagnetic metal sheets arranged along the circumferential direction of the region, different metal sheet groups are nested, and different ferromagnetic metal sheets in the metal sheet groups are arranged at intervals along the circumferential direction.

Further, the at least one ferromagnetic metal sheet is formed with at least one gap in a circumferential direction around the region.

Further, the size of the coverage area of the ferromagnetic metal sheet is larger than or equal to the size of the positioning magnet of the wireless power receiving end.

In a second aspect, there is provided a wireless power transmission kit comprising:

the wireless power transmitting end is arranged on the opposite surface of the charging surface to transmit wireless power to the charging surface; and

as described in the first aspect, the wireless charging auxiliary device is disposed on the charging surface at a position opposite to the transmitting coil of the wireless power transmitting terminal, so as to assist the wireless power receiving terminal and the wireless power transmitting terminal in positioning each other.

In a third aspect, there is provided an article of furniture comprising:

a mesa having a first face as a charging surface and an opposing second face;

as mentioned above, the wireless charging auxiliary device is arranged on the first surface to assist the wireless power receiving end and the wireless power transmitting end to be mutually positioned.

Further, the furniture further comprises:

the wireless power transmitting end is arranged on the second surface and used for transmitting wireless power to the charging surface;

the wireless charging auxiliary device is arranged at a position opposite to an electric energy transmitting coil of the wireless electric energy transmitting end.

The embodiment of the utility model provides a through setting up a ferromagnetic sheet metal that surrounds or partly surrounds the region that corresponds with electric energy receiving coil size, the magnetic adsorption through ferromagnetic sheet metal sets up the magnet device around electric energy receiving coil, and from this, ferromagnetic sheet metal can increase the adsorption affinity, realizes the accurate location of wireless power transmitting terminal and wireless power receiving terminal.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a circuit schematic of a prior art wireless charging system;

fig. 2 is a schematic diagram of a wireless power receiving end for which the wireless charging auxiliary device according to the embodiment of the present invention is applied;

FIG. 3 is a schematic diagram of a prior art wireless charging system;

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

fig. 5 is a position relationship diagram of each component in the alignment state of the wireless charging system according to the embodiment of the present invention;

fig. 6 is a cross-sectional view of a wireless charging assist device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of one implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 8 is a schematic diagram of another implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 9 is a schematic diagram of yet another implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 10 is a schematic diagram of yet another implementation of a ferromagnetic metal sheet of a wireless charging assist device of an embodiment of the invention;

fig. 11 is a schematic diagram of yet another implementation of a ferromagnetic metal sheet of a wireless charging assist device according to an embodiment of the invention;

fig. 12 is a schematic view of a piece of furniture equipped with a wireless charging accessory.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

A typical wireless charging system is shown in fig. 1, and a wireless power transmitting terminal 1 includes an input capacitor Vi n, an inverter circuit 11, and a power transmitting coil 12. The wireless power receiving terminal 2 includes a power receiving coil 21 and a rectifying circuit 22. The power transmitting coil 12 and the power receiving coil 21 are coupled to each other in a non-contact manner by an alternating magnetic field of a resonance frequency, thereby realizing wireless power transfer. The rectifying circuit 22 is used to convert the alternating current generated by the power receiving coil 21 in response to the alternating magnetic field into a direct current output. In general, the rectifier circuit 22 may employ a full-bridge rectifier circuit or a half-bridge rectifier circuit. During wireless charging, it is desirable that the power transmitting coil 12 can form good coupling with the power receiving coil 21 to maximize charging efficiency. While good coupling depends on the distance of the power transmitting coil 12 and the power receiving coil 21 and the alignment of the coil faces on which they are located.

In order to better realize the positioning alignment of the wireless power transmitting terminal and the wireless power receiving terminal, a wireless power receiving terminal with an auxiliary positioning magnet is provided. As shown in fig. 2, in such a radio power receiving terminal, a magnet 23 for positioning is provided around a power receiving coil 21 provided inside thereof. Since the back surface of the wireless power transmitting coil is generally provided with a magnetism isolating sheet, the magnet 23 and the magnetism isolating sheet may be attached to each other for positioning.

Fig. 3 is a schematic diagram of a prior art wireless charging system. In the system shown in fig. 3, the wireless power transmitting terminal 1 is disposed under the table top of a table. For a wireless power transmitting terminal adopting a remote wireless charging technology, an alternating magnetic field generated by a power transmitting coil can effectively penetrate through a table top made of wood, marble or glass. This makes it possible to directly place the wireless power receiving terminal 2, such as a smart phone, on the charging surface (i.e., within the range of the alternating magnetic field) on the desktop to obtain the induced voltage, thereby achieving charging. This technology greatly increases the possibility of applying wireless charging in public places, such as airports, train stations, restaurants, and the like. However, in such a wireless charging system, since the distance between the wireless power transmitting terminal 1 and the wireless power receiving terminal 2 is large (at least greater than 1 cm), the interaction force between the magnet 23 disposed in the wireless power receiving terminal 2 and the magnetism isolating sheet disposed in the wireless power transmitting terminal 1 is greatly weakened, so that the two cannot be accurately positioned based on the mutual adsorption force. Meanwhile, since the wireless power transmitting terminal 1 is disposed under the desktop and the area of the desktop is large, it is difficult for the user to know the position of the charging surface, and the requirement for positioning is further increased.

Fig. 4 is a schematic diagram of a wireless charging system according to an embodiment of the present invention. As shown in fig. 4, the utility model discloses wireless charging system of embodiment includes wireless power transmitting terminal 3, wireless power receiving terminal 4 and sets up between wireless power transmitting terminal and wireless power receiving terminal, with both the wireless auxiliary device 5 that charges that does not have the mechanical connection relation. The wireless power receiving terminal 4 has a power receiving coil 41 and a magnet 42 disposed around the power receiving coil. The wireless charging accessory 5 is formed in the form of at least one ferromagnetic metal sheet 51 arranged around the center a. That is, the wireless charging assist device 5 includes only one or more ferromagnetic metal pieces, and does not include other components. At least one ferromagnetic metal sheet is arranged around the center a so as to completely surround or partially surround the projection area X of the power receiving coil 41 on the plane of the ferromagnetic metal sheet 51. And below the region is a position where the power transmitting coil of the wireless power transmitting terminal 3 is located. In fig. 4, the wireless power transmitting terminal 3 is disposed on the lower surface of a desk panel 6, and the wireless charging assistant device 5 is disposed on the upper surface of the panel 6. Meanwhile, the wireless power receiving terminal 4 is placed on the wireless charging assist device 5.

The ferromagnetic metal plate 51 may be made of a metal material that can be attracted by a magnet, such as iron or an iron alloy or a magnet with magnetism. Therefore, the ferromagnetic metal sheet 52 provides mutual attraction with the magnet 42 at the wireless power receiving end, and the attraction force is increased.

Fig. 5 is a positional relationship diagram of each component of the wireless charging system in the alignment state according to the embodiment of the present invention. In order to more clearly understand the positional relationship of the components, fig. 5 is shown in a sectional view, and the housings of the respective devices are shown in broken lines. Fig. 5 shows the relationship of the power transmitting coil 31, the power receiving coil 41, the magnet 42, and the ferromagnetic metal piece 51 in the aligned state. As shown in fig. 5, the power transmitting coil 31 is disposed below a panel (not shown in the drawing). The panel has a thickness, for example a thickness greater than 10 mm. The power receiving coil 41 is disposed above the panel 6. The magnet 42 is disposed around the power receiving coil 41 in the same plane as the power receiving coil 41. The magnet 42 and the ferromagnetic metal sheet 51 are aligned by magnetic attraction, which causes the power receiving coil 41 surrounded by the magnet 42 to be aligned with the region X surrounded by the ferromagnetic metal sheet 51, which is aligned with the power transmitting coil 31. Thereby, the power receiving coil 41 and the power transmitting coil 31 are aligned with each other, resulting in better coupling. Meanwhile, when the wireless charging assist device 5 and the magnet 42 are attracted in alignment, the magnet 42 is partially or entirely shielded by the ferromagnetic metal piece 51, and thus, the influence of the alternating magnetic field from the power transmitting coil 31 on the magnet is reduced or completely shielded. This makes the eddy current that produces because alternating magnetic field acts on magnet reduce or be zero, has reduced the extra loss that leads to because the magnet, has also reduced the heating of magnet, has improved wireless charging system's overall efficiency. In an alternative implementation, the width of the ferromagnetic metal sheet 51 is greater than or equal to the width of the magnet 42 and has the same shape as the magnet, so that the ferromagnetic metal sheet 51 can completely shield the magnet 42, thereby minimizing the loss on the magnet and reducing the heat generation at the wireless power receiving end.

In an alternative implementation, as shown in fig. 2, the power receiving coil 41 and the magnet 42 are each formed in a circular shape. Correspondingly, the ferromagnetic metal piece 51 may also be formed in a circular ring shape. The inner diameter of the ferromagnetic metal piece 51 is smaller than the inner diameter of the magnet 42, and the outer diameters of the ferromagnetic metal piece and the magnet 42 are larger than the outer diameter of the magnet 42, so that the magnet 42 is completely shielded by the wireless charging auxiliary device.

Fig. 6 is a cross-sectional view of the wireless charging assistance device according to the embodiment of the present invention. As shown in fig. 6, in order to more conveniently fix the wireless charging assist device to the charging surface, a fixing layer 52 may be provided on the lower side of the ferromagnetic metal sheet 51 for fixing. In this embodiment, the fixing layer 52 may be an adhesive layer. Meanwhile, if the ferromagnetic metal pieces are provided in plurality as shown in fig. 7, the fixing layer 52 may be provided in the form of a circular ring-shaped adhesive tape with an adhesive layer so as to fix the plurality of ferromagnetic metal pieces thereto. It will be readily appreciated that in some implementations, the fixture may not be part of the wireless charging accessory device.

Further, in order to better identify the charging surface, so that a user at the wireless power receiving end can clearly identify the approximate area of the table top for wireless charging, the wireless charging auxiliary device can be set to have a significant difference from the color or texture of the table top. Thus, after the wireless charging assist device 5 is fixed to the floor, the position of the charging area can be indicated to the user by the annular shape. To this end, as shown in fig. 6, one or more decorative layers 53 may be further provided on the upper side of the ferromagnetic metal sheet 51 (i.e., the side of the ferromagnetic metal sheet facing the radio energy receiving end). The decorative layer may have a color or texture such that the surface of the wireless charging accessory has a color and/or texture different from the charging surface (in this embodiment, the table top). For example, if the table top is made of black glass, a wireless charging auxiliary device with a silver or white decorative layer can be used. Thereby clearly prompting the charging area. And then when the user placed the wireless power receiving terminal, carry out accurate alignment location through ferromagnetic metal sheet's adsorption affinity guide, improve charge efficiency.

As described above, the ferromagnetic metal sheet 51 may be provided in the shape of a circular ring. In addition, the ferromagnetic metal sheet 51 may be provided in a different form.

Fig. 7-11 are schematic illustrations of implementations of different forms of ferromagnetic metal sheets. In an alternative implementation, as shown in fig. 7, the ferromagnetic metal sheet 51 may be provided as a ring surrounding the region X.

In another alternative implementation, as shown in fig. 8, the ferromagnetic metal sheet 51a may be provided in a sector ring shape with an angle close to 360 degrees (for example, an angle of 300 degrees), or may be regarded as a gap or clearance S provided in a circumferential direction of a circular ring shape. The existence of the gap or the gap S can prevent the conductive ferromagnetic metal sheet from forming a closed current loop in the circumferential direction of the surrounding area X, and form a ring-shaped current around the area X under the influence of the alternating magnetic field, so that the loss caused by the ferromagnetic metal sheet 51 is reduced.

In another alternative implementation, as shown in fig. 9, the number of the ferromagnetic metal pieces 51b is plural, and each of the ferromagnetic metal pieces 51b is formed in a sector ring shape, which is disposed around the region X so as to form a ring shape. The ferromagnetic metal pieces 51b are spaced apart from each other. In fig. 9, the ferromagnetic metal pieces 51b are provided in the same shape. Alternatively, the ferromagnetic metal pieces may be differently shaped or sized. Alternatively, the ferromagnetic metal pieces 51b may be provided in a rectangular, trapezoidal, or other shape disposed around the periphery of the circular region.

In yet another alternative implementation, as shown in fig. 10, the wireless charging assist device is provided with a plurality of ferromagnetic metal pieces 51 c. Each ferromagnetic metal piece 51c is formed in a circular shape with different sizes, and is concentrically arranged, that is, a plurality of circular ferromagnetic metal pieces 51c are nested. By sizing each ferromagnetic metal piece 51c, an annular gap S exists between adjacent ferromagnetic metal pieces 51 c. Meanwhile, the widths of the ferromagnetic metal sheets 51c may be the same or different, and the widths of the annular gaps S between the ferromagnetic metal sheets may be the same or different, which may be set according to actual conditions and needs.

Further, in another alternative implementation, as shown in fig. 11, the annular ferromagnetic metal sheet 51c may be replaced by a plurality of sector-annular, trapezoidal, or rectangular ferromagnetic metal sheets 51d arranged along the circumference. The different ferromagnetic metal sheets are spaced apart from each other in the radial or circumferential direction to form a gap. This can reduce the area of each ferromagnetic metal piece and reduce eddy current.

It will be appreciated that the wireless charging assistance device 5 may also be provided in other shapes, the shape of which and the shape of the surrounding area being dependent on the shape of the power receiving coil of the wireless power receiving end for which it is intended and the shape of the magnet assembly disposed around the coil. For example, the area surrounded as a whole is a square, triangle, or other regular polygon, or the area surrounded as a whole is an ellipse, or the like.

The utility model discloses wireless auxiliary device that charges can also make and sell that various systems are supporting. For example, in one implementation, the wireless charging accessory may be manufactured and sold in association with the wireless power transmitting terminal. For another example, in another implementation, the wireless charging accessory may also be manufactured and sold in association with furniture carrying the wireless power transmitting end.

As shown in fig. 12, the furniture 7 is a table having a table top 6, and the wireless charging assist device 5 can be mounted to a predetermined area of the table top 6 in a uniform manner after the table body is manufactured. Meanwhile, the wireless power transmitting terminal 4 (not shown in the figure) can be correspondingly installed below the table top 6, or a mark or a component for assisting positioning can be arranged at a corresponding installation position below the table top 6. Thus, the furniture 7 can effectively realize the auxiliary alignment of the wireless power receiving end.

The embodiment of the utility model provides a through setting up a ferromagnetic sheet metal that surrounds or partly surrounds the region that corresponds with electric energy receiving coil size, the magnetic adsorption through ferromagnetic sheet metal sets up the magnet device around electric energy receiving coil, and from this, ferromagnetic sheet metal can increase the adsorption affinity, realizes the accurate location of wireless power transmitting terminal and wireless power receiving terminal.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A wireless auxiliary device that charges for assisting wireless electric energy receiving terminal and wireless electric energy transmitting terminal mutual positioning, its characterized in that, wireless auxiliary device that charges only includes:

at least one ferromagnetic metal sheet disposed around a center so as to completely or partially enclose an area having a size greater than or equal to a size of a power receiving coil of the wireless power receiving terminal.

2. The wireless charging assist device according to claim 1, wherein the overall shape of the at least one ferromagnetic metal piece is the same as or similar to the shape of a positioning magnet provided in the wireless power receiving terminal.

3. The wireless charging accessory device of claim 1, wherein the ferromagnetic metal sheet is provided with an adhesive layer on a back surface thereof, the adhesive layer being configured to secure the ferromagnetic metal sheet to a charging surface.

4. The wireless charging accessory device of claim 3, wherein the upper surface of the ferromagnetic metal sheet is provided with at least one decorative layer disposed thereon such that the surface of the wireless charging accessory device has a different color and/or texture than the charging surface.

5. The wireless charging accessory device of claim 1, wherein the at least one ferromagnetic metal sheet is an annular ferromagnetic metal sheet surrounding a circular region; or

The at least one ferromagnetic metal sheet is a plurality of ferromagnetic metal sheets which are arranged at intervals to surround the region; or

The at least one ferromagnetic metal sheet is a sector annular ferromagnetic metal sheet partially surrounding the circular area; or

The at least one ferromagnetic metal sheet is a plurality of annular ferromagnetic metal sheets concentrically arranged around the center of the region, and the annular ferromagnetic metal sheets have gaps along the radial direction; or

The at least one ferromagnetic metal sheet comprises a plurality of metal sheet groups, each metal sheet group comprises a plurality of ferromagnetic metal sheets arranged along the circumferential direction of the region, different metal sheet groups are nested, and different ferromagnetic metal sheets in the metal sheet groups are arranged at intervals along the circumferential direction.

6. The wireless charging accessory device of claim 1, wherein the at least one ferromagnetic metal sheet is formed with at least one gap in a circumferential direction around the region.

7. The wireless charging assist device according to claim 1, wherein the size of the ferromagnetic metal sheet covering area is greater than or equal to the size of a positioning magnet of the wireless power receiving end.

8. A wireless power transmission kit, comprising:

the wireless power transmitting end is arranged on the opposite surface of the charging surface to transmit wireless power to the charging surface; and

the wireless charging assist apparatus as claimed in any one of claims 1 to 7, disposed on the charging surface at a position opposite to the transmitting coil of the wireless power transmitting terminal to assist the mutual positioning of the wireless power receiving terminal and the wireless power transmitting terminal.

9. An article of furniture, comprising:

a mesa having a first face as a charging surface and an opposing second face;

the wireless charging assist device as claimed in any one of claims 1 to 7, disposed on the first face to assist the mutual positioning of the wireless power receiving end and the wireless power transmitting end.

10. The furniture according to claim 9, further comprising:

the wireless power transmitting end is arranged on the second surface and used for transmitting wireless power to the charging surface;

the wireless charging auxiliary device is arranged at a position opposite to an electric energy transmitting coil of the wireless electric energy transmitting end.

Images