CN113571287B

CN113571287B - Wireless charging module

Info

Publication number: CN113571287B
Application number: CN202110835690.2A
Authority: CN
Inventors: 唐子舜; 刘立冬; 付亚奇; 石枫
Original assignee: Hengdian Group DMEGC Magnetics Co Ltd
Current assignee: Hengdian Group DMEGC Magnetics Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2023-03-14
Anticipated expiration: 2041-07-23
Also published as: CN113571287A

Abstract

The invention relates to the technical field of charging equipment, and discloses a wireless charging module, which comprises a magnetic conduction structure, wherein the magnetic conduction structure comprises: the nanocrystalline unit layer comprises a plurality of nanocrystalline units which are arranged at intervals, and a bakelite plate is filled between every two adjacent nanocrystalline units; the nanocrystalline unit comprises a plurality of nanocrystalline layers and a plurality of insulating layers, and the nanocrystalline layers and the insulating layers are alternately stacked to enable two adjacent nanocrystalline layers to be arranged in an insulating mode; a ferrite layer connected to a side of the nanocrystal cell layer. Through above-mentioned structure, this wireless module that charges not only can reduce the eddy current loss among the charging process, reduces and generates heat, still has less volume and weight, is favorable to the lightweight.

Description

Wireless charging module

Technical Field

The invention relates to the technical field of charging equipment, in particular to a wireless charging module.

Background

The wireless charging technology can realize the electrical isolation between a power supply and a load, has the characteristics of convenience, flexibility, safety and reliability, receives more and more extensive attention in recent years, and is gradually expanded to be applied to the fields of electric automobiles, smart homes, robots and the like besides being applied to consumer electronics. Besides the economical efficiency of the wireless charging technology, the technical performance indexes such as system efficiency and electromagnetic environment always limit the large-scale popularization and application of the wireless charging technology.

At present, a magnetic conduction structure of a wireless charging system is mainly formed by ferrite materials, but because the saturation magnetic flux density of ferrite is low, a thick material is needed to realize the same coupling coefficient, and the volume and the weight of the magnetic conduction structure are increased finally. At present, a method for solving the problems by selecting the nanocrystalline strip material appears, but because the resistivity of the nanocrystalline is low, the eddy current loss in the nanocrystalline material is large, the material is easy to be damaged by heating, and the charging efficiency is influenced.

Disclosure of Invention

The invention aims to provide a wireless charging module which can reduce eddy current loss and heat generation in the charging process, has smaller volume and weight and is beneficial to light weight.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a wireless module of charging, includes the magnetic conduction structure, the magnetic conduction structure includes: the nanocrystalline unit layer comprises a plurality of nanocrystalline units which are arranged at intervals, and a bakelite plate is filled between every two adjacent nanocrystalline units; the nanocrystalline unit comprises a plurality of nanocrystalline layers and a plurality of insulating layers, and the nanocrystalline layers and the insulating layers are alternately stacked so as to enable two adjacent nanocrystalline layers to be arranged in an insulating mode; a ferrite layer connected to a side of the nanocrystal cell layer.

As an optimal scheme of the wireless charging module, the wireless charging module further comprises a charging structure, wherein the charging structure is provided with a containing cavity, and the magnetic conduction structure is arranged in the containing cavity.

As a preferred scheme of wireless module of charging, the structure of charging includes bakelite board layer and coil inlayed layer, the coil inlayed layer connect in on a side of bakelite board layer, the holding chamber is seted up in the bakelite board layer is kept away from on the side of coil inlayed layer.

As a preferred scheme of the wireless charging module, the nanocrystalline unit layer is connected to a side of the ferrite layer away from the charging structure.

As a preferred scheme of wireless module of charging, the coil inlayed layer includes charging coil and second base plate, the charging coil set up in the second base plate, the second base plate connect in the bakelite plate layer is kept away from the side of magnetic conduction structure.

As a preferred scheme of the wireless charging module, the wireless charging module further comprises a lead wire, and the lead wire is connected to the charging coil and used for introducing power.

As a preferred scheme of the wireless charging module, the nanocrystal unit layer further includes a first substrate, and the plurality of nanocrystal units are disposed in the first substrate at intervals.

As a preferable scheme of the wireless charging module, the plurality of nanocrystal units are arranged in parallel and at equal intervals in the first substrate.

As a wireless charging module's preferred scheme, the ferrite layer includes a plurality of ferrite plates, and is a plurality of the ferrite plate splices each other.

As a preferred scheme of the wireless charging module, the nanocrystal unit is configured as a strip, and the plurality of strip-shaped nanocrystal layers and the plurality of strip-shaped insulating layers are stacked to form the nanocrystal unit.

The invention has the beneficial effects that:

the invention provides a wireless charging module which comprises a magnetic conduction structure, wherein the magnetic conduction structure comprises a nanocrystalline unit layer and a ferrite layer, the ferrite layer is connected to the side surface of the nanocrystalline unit layer, the nanocrystalline unit layer comprises a plurality of nanocrystalline units arranged at intervals, and each nanocrystalline unit comprises a plurality of nanocrystalline layers and a plurality of insulating layers which are alternately stacked so as to enable two adjacent nanocrystalline layers to be arranged in an insulating mode. Through above-mentioned structure, ferrite and nanocrystalline carry out the composite layout, still can guarantee magnetic flux density after reducing the thickness of ferrite, have reduced the volume and the weight of this wireless module that charges, are favorable to the lightweight design, have still reduced the eddy current loss of nanocrystalline material among the charging process, have reduced and have generated heat, are favorable to improving charge efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a cross-sectional view of a wireless charging module according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of a nanocrystal unit in a wireless charging module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a ferrite layer in a wireless charging module according to an embodiment of the invention;

fig. 4 is a schematic structural diagram of a bakelite board layer in a wireless charging module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a charging coil in a wireless charging module according to an embodiment of the present invention.

In the figure:

1. a nanocrystalline unit layer; 11. a nanocrystal unit; 111. a nanocrystalline layer; 112. an insulating layer; 12. a first substrate; 2. a ferrite layer; 21. a ferrite plate; 3. a bakelite board layer; 31. an accommodating cavity; 4. a coil inlay; 41. a charging coil; 42. a second substrate; 5. and (6) leading wires.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The technical solution of the wireless charging module provided by the present invention is further described with reference to the accompanying drawings and specific embodiments.

The present embodiment provides a wireless charging module, as shown in fig. 1 and fig. 3, the wireless charging module includes a magnetic conductive structure and a charging structure, the charging structure is provided with an accommodating cavity 31, and the magnetic conductive structure is installed in the accommodating cavity 31. It can be understood that the magnetic conduction structure can be connected to the inner wall of the accommodating cavity 31 by gluing or the like, and those skilled in the art can select the connection mode between the magnetic conduction structure and the inner wall of the accommodating cavity 31 according to actual conditions.

Specifically, as shown in fig. 1, the magnetic conduction structure includes a nanocrystalline unit layer 1 and a ferrite layer 2, the ferrite layer 2 is connected to the side of the nanocrystalline unit layer 1, and the nanocrystalline unit layer 1 is connected to the side of the ferrite layer 2 far away from the charging structure, so that the nanocrystalline unit layer 1, the ferrite layer 2 and the charging structure can be sequentially arranged from top to bottom. The nanocrystal unit layer 1 comprises a plurality of nanocrystal units 11, the nanocrystal units 11 are arranged at intervals, and a bakelite plate is filled between every two adjacent nanocrystal units 11 so as to enable the two adjacent nanocrystal units 11 to be arranged in an isolated mode. As shown in fig. 2, the nanocrystal unit 11 includes a plurality of nanocrystal layers 111 and a plurality of insulating layers 112, and the plurality of nanocrystal layers 111 and the plurality of insulating layers 112 are alternately stacked to provide insulation between two adjacent nanocrystal layers 111, thereby ensuring the insulation between the nanocrystal layers 111. It is understood that the insulating layers 112 are disposed one more layer than the nanocrystal layers 111, such that both sides of any one nanocrystal layer 111 are disposed with the insulating layers 112, i.e., any one nanocrystal layer 111 is sandwiched between two insulating layers 112.

Specifically, the nanocrystal cells 11 are arranged in a stripe shape, and a plurality of stripe-shaped nanocrystal layers 111 and a plurality of stripe-shaped insulating layers 112 are arranged one on another to constitute the nanocrystal cells 11. The manufacturing process of the nanocrystalline unit 11 is as follows: the insulating material and the nanocrystalline material are overlapped, the total number of overlapped layers ranges from 145 to 401, the number of layers of the nanocrystalline layer 111 formed by the nanocrystalline material ranges from 72 to 200, and the number of layers of the insulating layer 112 formed by the insulating material ranges from 73 to 201. To ensure insulation between nanocrystals, the insulating layer 112 is one more layer than the nanocrystal layer 111. Then cutting the nano-crystalline material into strip-shaped nano-crystalline units 11 with the width ranging from 2mm to 5mm, wherein the nano-crystalline units 11 are arranged in parallel at equal intervals. Preferably, the distance between two adjacent nanocrystal units 11 ranges from 1mm to 5mm, and the specific distance between two adjacent nanocrystal units 11 can be set by one skilled in the art according to actual situations.

Preferably, the nanocrystal unit layer 1 further includes a first substrate 12, the plurality of nanocrystal units 11 are arranged in the first substrate 12 at intervals, and the plurality of nanocrystal units 11 are arranged in parallel and at equal intervals in the first substrate 12, so that the relative positions between the nanocrystal units 11 are fixed.

In the present embodiment, as shown in fig. 3, the ferrite layer 2 includes a plurality of ferrite plates 21, and the plurality of ferrite plates 21 are spliced to form the ferrite layer 2 disposed on the side of the nano-cell layer.

Through above-mentioned structure, ferrite and nanocrystalline carry out the composite layout, still can guarantee magnetic flux density after reducing the thickness of ferrite, have reduced the volume and the weight of this wireless module that charges, are favorable to the lightweight design, have still reduced the eddy current loss of nanocrystalline material among the charging process, have reduced and have generated heat, are favorable to improving charge efficiency.

Preferably, the charging structure includes bakelite plate layer 3 and coil embedded layer 4, and coil embedded layer 4 is connected on one side of bakelite plate layer 3, as shown in fig. 4, holding chamber 31 is seted up on the side that bakelite plate layer 3 keeps away from coil embedded layer 4 for the magnetic conduction structure is installed on the side that bakelite plate layer 3 keeps away from coil embedded layer 4.

In this embodiment, coil embedded layer 4 includes charging coil 41 and second substrate 42, and charging coil 41 sets up in second substrate 42, and second substrate 42 connects in the side of bakelite plate layer 3 keeping away from the magnetic conduction structure. Preferably, as shown in fig. 5, the wireless charging module further includes a lead 5, and the lead 5 is connected to the charging coil 41 for supplying power, so that the charging coil 41 can realize wireless charging through electromagnetic induction.

It should be noted that charging coil 41 may be a circular ring structure or a rectangular ring structure, a person skilled in the art can select a specific structural shape of charging coil 41 according to the actual situation of the magnetic conduction structure, charging coil 41 may be wound into a certain size according to the requirements of the required length, width, and the like of the charging structure, and then cut to obtain the charging structure conforming to the size.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

It is noted that throughout the description of the present specification, references to "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. The utility model provides a wireless module that charges which characterized in that, includes the magnetic conduction structure, the magnetic conduction structure includes:

the nanocrystalline unit layer (1) comprises a plurality of nanocrystalline units (11), the nanocrystalline units (11) are arranged at intervals, and a bakelite plate is filled between every two adjacent nanocrystalline units (11); the nanocrystalline unit (11) comprises a plurality of nanocrystalline layers (111) and a plurality of insulating layers (112), wherein the nanocrystalline layers (111) and the insulating layers (112) are alternately stacked to enable the adjacent nanocrystalline layers (111) to be arranged in an insulating mode;

a ferrite layer (2), the ferrite layer (2) being connected to a side of the nanocrystalline unit layer (1);

the charging structure comprises an electric wood board layer (3) and a coil embedded layer (4), the coil embedded layer (4) is connected to one side face of the electric wood board layer (3), and an accommodating cavity (31) is formed in the side face, far away from the coil embedded layer (4), of the electric wood board layer (3); the charging structure is provided with an accommodating cavity (31), the magnetic conduction structure is installed in the accommodating cavity (31), and the nanocrystalline unit layer (1) is connected to the side face, far away from the charging structure, of the ferrite layer (2) which is arranged in the accommodating cavity (31).

2. The wireless charging module according to claim 1, wherein the coil embedded layer (4) comprises a charging coil (41) and a second substrate (42), the charging coil (41) is disposed in the second substrate (42), and the second substrate (42) is connected to a side of the bakelite plate layer (3) far away from the magnetic conductive structure.

3. The wireless charging module according to claim 2, further comprising a lead (5), wherein the lead (5) is connected to the charging coil (41) for passing power.

4. The wireless charging module according to claim 1, wherein the nanocrystal cell layer (1) further comprises a first substrate (12), and a plurality of nanocrystal cells (11) are arranged in the first substrate (12) at intervals.

5. The wireless charging module according to claim 4, wherein a plurality of the nanocrystal units (11) are arranged in parallel and at equal intervals in the first substrate (12).

6. The wireless charging module according to claim 1, characterized in that the ferrite layer (2) comprises a plurality of ferrite plates (21), the plurality of ferrite plates (21) being spliced to each other.

7. The wireless charging module according to claim 1, wherein the nanocrystal unit (11) is configured as a strip, and a plurality of strip-shaped nanocrystal layers (111) and a plurality of strip-shaped insulating layers (112) are stacked on top of each other to form the nanocrystal unit (11).