KR20230150474A - wireless power transmission module - Google Patents

Abstract

A wireless power transmission module is provided. A wireless power transmission module according to an embodiment of the present invention includes a wireless power transmission antenna for transmitting wireless power; A shielding member made of a ferrite material to shield the magnetic field generated from the wireless power transmission antenna and including a receiving groove formed at a certain depth from one surface to accommodate the wireless power transmission antenna; and a separator provided in the shielding member to form the receiving groove in the shielding member and prevent the portion surrounding the outer edge of the wireless power transmission antenna disposed in the receiving groove from being separated from the body of the shielding member. Includes a prevention member.

Description

Wireless power transmission module {wireless power transmission module}

The present invention relates to a wireless power transmission module.

Wireless power transmission technology does not require a separate wired cable when charging, providing greater user convenience. Accordingly, wireless power transmission technology is widely used as a method for charging batteries in various electronic devices.

Battery charging using such wireless power transmission can satisfy the required charging efficiency only when the wireless power transmission module and wireless power reception module are aligned with each other.

As part of this, the wireless power transmission module can maintain alignment with the wireless power reception module by placing a permanent magnet for alignment at the center of the antenna, using a direct current magnetic field generated from the magnet.

However, when permanent magnets are placed around the antenna, there is a problem that charging efficiency is reduced due to the influence of the permanent magnets.

To solve this problem, the shielding member used in the wireless power transmission module reduces the influence of permanent magnets by forming a receiving groove to accommodate the antenna.

However, when a receiving groove is formed in the shielding member, the part that defines the receiving groove and surrounds the side of the antenna is formed to protrude at a certain height from the plate-shaped part.

Accordingly, if the shielding member is made of a highly brittle ferrite material, the part that protrudes at a certain height from the plate-shaped part to define the receiving groove and surround the side of the antenna is inevitably very vulnerable to external shock.

In other words, a wireless power transmission module employing a shielding member made of ferrite material and having a receiving groove has a problem in that the part surrounding the side of the antenna while defining the receiving groove during a drop test falls or separates due to impact.

Because of this, if the part surrounding the side of the antenna while defining the receiving groove during the drop test falls or separates due to impact, there is a problem in which the wireless power transmission module cannot pass quality certification.

The present invention was developed in consideration of the above points, and is a wireless power transmission module that can prevent the edge portion defining the receiving groove from being separated even if the shielding member made of ferrite material includes a receiving groove for accommodating the antenna. The purpose is to provide.

In order to achieve the above object, the present invention includes a wireless power transmission antenna for transmitting wireless power; A shielding member made of a ferrite material to shield the magnetic field generated from the wireless power transmission antenna and including a receiving groove formed at a certain depth from one surface to accommodate the wireless power transmission antenna; and a separator provided in the shielding member to form the receiving groove in the shielding member and prevent the portion surrounding the outer edge of the wireless power transmission antenna disposed in the receiving groove from being separated from the body of the shielding member. A wireless power transmission module including a prevention member is provided.

In addition, the shielding member forms a plate-shaped portion having a predetermined area and a certain thickness, and the receiving groove from one side of the plate-shaped portion so as to surround the outer edge of the wireless power transmission antenna disposed in the receiving groove. It may include a first protruding portion that protrudes at a certain height.

In addition, the wireless power transmission module further includes a fixing adhesive member disposed between the bottom surface of the receiving groove and one surface of the wireless power transmission antenna to fix the wireless power transmission antenna to the bottom surface of the receiving groove. can do.

Additionally, the separation prevention member may be an anti-separation adhesive member that extends at a certain height from the edge of the fixing adhesive member so that it can be disposed on the inner surface of the first protruding portion forming the side surface of the receiving groove.

In this case, the separation prevention adhesive member and the fixing adhesive member may be formed integrally.

As another example, the separation prevention member may be an adhesive member for separation prevention disposed along the side peripheral surface of the shielding member so as to cover both the side surface of the plate-shaped portion and the outer surface of the first protruding portion.

In this case, the anti-separation adhesive member includes a first portion disposed along the side peripheral surface of the shielding member so as to cover both the side surface of the plate-shaped portion and the outer surface of the first protruding portion, and the first protruding portion. It may include a second part extending a certain length from the first part so as to cover the upper surface of the part or the lower surface of the plate-shaped part.

Additionally, the separation prevention member may be an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or may be an inorganic type adhesive layer.

In addition, the wireless power transmission module may further include a permanent magnet for alignment arranged to be located at the center side of the wireless power transmission antenna.

Additionally, the permanent magnet for alignment may be inserted into an arrangement hole formed to penetrate the bottom surface of the receiving groove.

In addition, the shielding member may include a second protruding portion extending from the bottom surface of the receiving groove to a certain height along the edge of the placement hole, and the second protruding part forms the receiving groove and the placement hole. It may be a part surrounding the inner edge of the wireless power transmission antenna disposed in the receiving groove.

According to the present invention, even if the shielding member made of ferrite material includes a receiving groove for accommodating the antenna, the quality certification problem can be solved by preventing the edge portion defining the receiving groove from being separated.

1 is a diagram showing a wireless power transmission module according to an embodiment of the present invention;
Figure 2 is an exploded view of Figure 1;
Figure 3 is a cross-sectional view in the direction AA of Figure 1;
Figure 4 is a diagram showing a wireless power transmission module according to another embodiment of the present invention;
Figure 5 is an exploded view of Figure 4;
Figure 6 is a cross-sectional view in the BB direction of Figure 4;
Figure 7 is a view showing a modified example of Figure 6, and
Figure 8 is a diagram showing another modification of Figure 6.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and identical or similar components are given the same reference numerals throughout the specification.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

In addition, the top and bottom surfaces used in the present specification and claims may refer to a horizontal plane parallel to the x-axis based on FIG. 3, and the sides and sides may refer to a horizontal plane parallel to the y-axis based on FIG. 3. And the side peripheral surface may mean a surface surrounding the y-axis based on FIG. 3. In addition, the thickness direction and height direction used in the present specification and claims may mean a direction parallel to the y-axis with respect to FIG. 3, and the width direction may mean a direction parallel to the x-axis with respect to FIG. 3. You can.

The wireless power transmission modules (100, 200, 200', 200') according to an embodiment of the present invention include a wireless power transmission antenna 110, a shielding member 120, and a separation prevention member (140, 240, 240') as shown in FIGS. 1 to 8. ,240").

The wireless power transmission antenna 110 can transmit wireless power using a predetermined frequency band when supplying power. In other words, the wireless power transmission antenna 110 may serve as a primary coil for wirelessly charging the battery of an electronic device equipped with a wireless power reception antenna.

Such a wireless power transmission antenna 110 may be a flat coil in which a conductive member having a certain length is wound a plurality of times in a clockwise or counterclockwise direction to form a coil body, and the coil body has a predetermined area in the center. It may include a hollow portion 112 formed of , and the planar coil may be formed as a single layer or multiple layers.

Here, the wireless power transmission antenna 110 may be an antenna smaller in size than a Qi standard A11 standard antenna, such as a smart watch, but is not limited to this and may be an antenna of the Qi standard A11 standard, such as a smartphone.

In addition, the conductive member forming the coil body of the planar coil may be composed of a plurality of wires having a predetermined wire diameter, and the surface of the plurality of wires may be insulated with an insulating coating material, The plurality of wires may be twisted together along the length direction or may be arranged parallel to each other along one direction.

The shielding member 120 operates in a predetermined frequency band by shielding the magnetic field generated from the wireless power transmission antenna 110 and increasing the concentration of the magnetic field in a desired direction. can improve performance.

To this end, the shielding member 120 may be made of a ferrite material, and the ferrite may be a sintered ferrite such as Mn-Zn ferrite or Ni-Zn ferrite.

At this time, the shielding member 120 may include a receiving groove (S) formed from one side to a certain depth to accommodate the wireless power transmission antenna 110.

For example, the shielding member 120 may include a plate-shaped portion 122 having a predetermined area and thickness, and a protruding portion 124 that protrudes from the plate-shaped portion 122 at a predetermined height, and the protruding portion ( 124) may be formed in a ring shape having a closed loop shape, and the protruding portion 124 may be formed to have the same height as the thickness of the wireless power transmission antenna 110 or the thickness of the wireless power transmission antenna 110. It can be formed to have a relatively larger height.

Accordingly, the receiving groove (S) may be defined by one side of the plate-shaped portion 122 and the side surface of the protruding portion 124, and the wireless power transmission antenna 110 inserted into the receiving groove (S) ) may be surrounded through the protruding portion 124.

In this case, the protruding portion 124 may be provided to surround only the outer edge of the wireless power transmission antenna 110 inserted into the receiving groove (S), but the wireless power transmission antenna 110 inserted into the receiving groove (S) may be provided. It may be provided to surround both the outer and inner edges of the antenna 110.

As a specific example, the protruding portion 124 is formed from one side of the plate-shaped portion 122 so as to form the receiving groove and surround the outer edge of the wireless power transmission antenna 110 disposed in the receiving groove (S). A first protruding portion 124a that protrudes at a certain height, and a plate-shaped portion 122 so as to form the receiving groove and surround the inner edge of the wireless power transmission antenna 110 disposed in the receiving groove (S). It may include a second protruding portion 124b that protrudes from one surface at a certain height.

In this case, each of the first protruding portion 124a and the second protruding portion 124b may be formed in a ring shape with a closed loop shape, and the second protruding portion 124b may be formed of the first protruding portion (124b). It may be provided to have a relatively smaller size than 124a), and the second protruding portion 124b may be provided to be inserted into the hollow portion 112 of the wireless power transmission antenna 110. In addition, the first protruding part 124a may be provided to have a thin width and may be provided to have a relatively thinner width than the second protruding part 124b.

Accordingly, the receiving groove (S) may be defined through one surface of the first protruding part (124a), one surface of the plate-shaped part (122), and one surface of the second protruding part (124b), and the receiving groove (S) The wireless power transmission antenna 110 inserted into (S) may be surrounded by an outer border and an inner border through the first protruding part 124a and the second protruding part 124b, and the wireless power transmission antenna 110 ) may be disposed in the receiving groove (S) so that one side faces one side of the shielding member 120 forming the bottom surface of the receiving groove (S).

At this time, the wireless power transmission module (100, 200, 200', 200') according to an embodiment of the present invention includes a fixing adhesive member 130 for fixing the wireless power transmission antenna 110 inserted into the receiving groove (S). It can be included.

That is, the fixing adhesive member 130 may be positioned between the bottom surface of the receiving groove (S) facing each other and one surface of the wireless power transmission antenna 110.

Accordingly, the wireless power transmission antenna 110 inserted into the receiving groove (S) can be fixed to the bottom surface of the receiving groove (S) through the fixing adhesive member 130.

Here, the fixing adhesive member 130 may be an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or may be an inorganic type adhesive layer.

The separation prevention members (140, 240, 240', 240") form the receiving groove (S) in the shielding member (120) and surround the outer edge of the wireless power transmission antenna disposed in the receiving groove (S). Separation from the body of the shielding member 120 can be prevented.

That is, the separation prevention members 140, 240, 240', and 240" may be provided on the shielding member 120 to prevent the first protruding portion 124a from being separated from the plate-shaped portion 122.

Accordingly, the wireless power transmission modules (100, 200, 200', 200') according to an embodiment of the present invention have a first receiving groove (S) forming the receiving groove (S) even if the shielding member (120) is made of a highly brittle ferrite material. It is possible to prevent the protruding portion 124a from being damaged by external impact and falling off or being separated from the plate-shaped portion 122.

For this reason, the wireless power transmission module (100, 200, 200', 200') according to an embodiment of the present invention has a shielding member 120 made of a ferrite material and has a receiving groove (S) for accommodating the wireless power transmission antenna 110. Even if included, the quality certification problem can be solved by fundamentally preventing the damaged portion of the first protruding portion 124a defining the receiving groove S from being separated from the shielding member 120.

For example, the separation prevention member 140 may be arranged to be located on the inner surface of the first protruding portion 124a forming the side surface of the receiving groove S, as shown in FIGS. 1 to 3. .

In this case, the separation prevention member 140 may include a first separation prevention adhesive member 142 extending at a certain height from the edge of the fixing adhesive member 130, and the first separation prevention adhesive member ( 142) may be formed integrally with the fixing adhesive member 130 disposed on the bottom surface of the receiving groove (S).

That is, the first anti-separation adhesive member 142 extends a certain length from the edge of the fixing adhesive member 130 disposed on the bottom surface of the receiving groove (S) toward the first protruding portion (124a). It may be a part.

In this case, the first anti-separation adhesive member 142 is used in the receiving groove among the total area of the fixing adhesive member 130 during the process of attaching the fixing adhesive member 130 to the receiving groove (S). The portion excluding the portion corresponding to the bottom surface of (S) may be formed by bending along the inner surface of the first protruding portion 124a.

Accordingly, even if part or all of the first protruding part 124a is damaged by external shock, the damaged part of the first protruding part 124a is connected to the shielding member through the first anti-separation adhesive member 142. It can be prevented from falling or being separated from (120).

At this time, the separation prevention member 140 may further include a second separation prevention adhesive member 144 extending from the edge of the fixing adhesive member 130 to a certain height, and the second separation prevention adhesive member 144 ) may be formed integrally with the fixing adhesive member 130 disposed on the bottom surface of the receiving groove (S).

That is, the second anti-separation adhesive member 144 is an extension portion extending a certain length from the edge of the fixing adhesive member 130 disposed on the bottom surface of the receiving groove (S) toward the second protruding portion (124b). It can be.

In this case, the second anti-separation adhesive member 144 is used in the receiving groove among the total area of the fixing adhesive member 130 in the process of attaching the fixing adhesive member 130 to the receiving groove (S). The portion excluding the portion corresponding to the bottom surface of (S) may be formed by bending along one side of the second protruding portion 124b.

Accordingly, even if part or all of the second protruding part 124b is damaged by external shock, the damaged part of the second protruding part 124b is connected to the shielding member through the second anti-separation adhesive member 144. It can be prevented from falling or being separated from (120).

In addition, the first anti-separation adhesive member 142 and the second anti-separation adhesive member 144 may be adhesive tapes with an adhesive layer applied to one or both sides of the substrate, similar to the fixing adhesive member 130 described above. , It may be an inorganic type adhesive layer.

As another example, the separation prevention member 240 is a shielding member so as to cover both the side surface of the plate-shaped portion 122 and the outer surface of the first protruding portion 124a, as shown in FIGS. 4 to 6. It may be an adhesive member to prevent separation disposed along the side peripheral surface of (120).

That is, unlike the above-described embodiment, the separation prevention member 240 according to the present embodiment is not disposed so as to be located on the inner surface of the first protruding portion 124a defining the receiving groove (S). ), and the plate-shaped portion that forms the peripheral surface of the shielding member 120 together with the outer surface of the first protruding portion 124a. It may be arranged to surround the sides of (122) together.

Accordingly, even if part or all of the first protruding part 124a is damaged by external shock, the damaged part of the first protruding part 124a is connected to the shielding member 120 through the separation prevention member 240. It can be prevented from falling or becoming separated.

Here, the separation prevention member 240 may be an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or may be an inorganic type adhesive layer.

As another example, in the wireless power transmission modules 200' and 200' according to an embodiment of the present invention, the separation prevention members 240' and 240" are the plate-shaped portions as shown in FIGS. 7 and 8. It may be configured to cover the upper surface of the first protruding part 124a or the lower surface of the plate-shaped part 122 along with the side surface of 122 and the outer surface of the first protruding part 124a.

As a specific example, as shown in FIG. 7, the separation prevention member 240' is a shielding member 120 so as to cover both the side surface of the plate-shaped portion 122 and the outer surface of the first protruding portion 124a. ), a first part 242 disposed along the side peripheral surface, and a second part 244 extending a certain length from the first part 242 so as to cover the upper surface of the first protruding part 124a. It can be included.

In this case, the second part 244 may be provided to have an area corresponding to the upper surface of the first part 242, and the second part 244 may be equal to the width of the first part 242. They may have corresponding lengths, and the first part 242 and the second part 244 may be formed as one piece.

That is, the second part 244 extends a certain length in the direction of the upper surface of the first protruding part 124a from the end of the first part 242 disposed along the side peripheral surface of the shielding member 120. It may be an extension part.

Accordingly, even if part or all of the first protruding part 124a is damaged by external shock, the damaged part of the first protruding part 124a is connected to the shielding member 120 through the separation prevention member 240'. ) can be prevented from falling or becoming separated from the

Here, the separation prevention member 240' may be an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or may be an inorganic type adhesive layer.

Differently, as shown in FIG. 8, the separation prevention member 240" is the shielding member 120 so as to cover both the side surface of the plate-shaped portion 122 and the outer surface of the first protruding portion 124a. It may include a first part 242 disposed along the side peripheral surface of the plate, and a second part 246 extending a certain length from the first part 242 to cover the lower surface of the plate-shaped part 122. there is.

In this case, the second part 246 may be provided to have an area corresponding to the lower surface of the plate-shaped part 122, and the first part 242 and the second part 246 may be formed as one piece. You can.

That is, the first part 242 may be an extension part that extends a certain length from the edge of the second part 246 disposed on the lower surface of the plate-shaped part 122 toward the first protruding part 124a.

Accordingly, even if part or all of the first protruding part 124a is damaged by external shock, the damaged part of the first protruding part 124a is connected to the shielding member 120 through the separation prevention member 240". ) can be prevented from falling or becoming separated from the

Here, the separation prevention member 240" may be an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or may be an inorganic type adhesive layer.

Meanwhile, the wireless power transmission module (100, 200, 200', 200') according to an embodiment of the present invention includes an alignment permanent magnet 150 located on the hollow portion 112 of the wireless power transmission antenna 110. More may be included.

Such an alignment permanent magnet 150 can easily align other corresponding modules to the correct position during wireless power transmission.

For example, the other module may be a known wireless power reception module including a wireless power reception antenna.

To this end, the shielding member 120 may include an arrangement hole 126 formed to penetrate the bottom surface of the receiving groove S, and the alignment permanent magnet 150 may be formed through the arrangement hole 126. It can be inserted and placed in .

In this case, the shielding member 120 is located at the bottom of the receiving groove (S) to prevent performance degradation of the wireless power transmission antenna 110 due to the direct current magnetic field generated from the alignment permanent magnet 150. It may include a second protruding portion 124b extending from the surface to a certain height along the edge of the placement hole 126.

That is, the second protruding portion 124b forms the receiving groove (S) and the placement hole 126 and surrounds the inner edge of the wireless power transmission antenna 110 disposed in the receiving groove (S). It may be formed to protrude at a certain height from the bottom surface of the receiving groove (S).

Accordingly, the receiving groove (S) may be defined through one surface of the first protruding part (124a), one surface of the plate-shaped part (122), and one surface of the second protruding part (124b), and the receiving groove (S) The outer edge of the wireless power transmission antenna 110 inserted into (S) may be surrounded by the first protruding portion 124a, and the wireless power transmission antenna 110 inserted into the receiving groove (S) has an inner edge. An edge may be surrounded by the second protruding portion 124b.

Through this, the second protruding portion 124b serves as a blocking wall to block the direct current magnetic field generated from the alignment permanent magnet 150 inserted into the placement hole 126, thereby Deterioration in the performance of the wireless power transmission antenna 110 can be prevented.

Meanwhile, the wireless power transmission modules 100, 200, 200', and 200' described above may be implemented as wireless chargers for wearables such as smartwatches, but are not limited to this and may also be implemented as wireless chargers for portable electronic devices such as mobile phones.

In addition, when the wireless power transmission antenna 110 described above is replaced with a wireless power reception antenna, the wireless power transmission modules 100, 200, 200', and 200' described above are wireless power reception modules built into wearable electronic devices or portable electronic devices. It may be implemented.

In addition, in the above description, it is exemplified that the shielding member 120 is made of a ferrite material, but the present invention is not limited thereto. If the receiving groove (S) is formed on one surface described above, polymer, amorphous ribbon, All of the various known materials used as magnetic field shielding members, such as permalloy, can be applied.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , other embodiments can be easily proposed by change, deletion, addition, etc., but this will also be said to be within the scope of the present invention.

100,200,200',200": Wireless power transmission module
110: wireless power transmission antenna 112: hollow body
120: Shielding member S: Receiving groove
122: plate-shaped portion 124: protruding portion
126: Placement hole 130: Adhesive member for fixation
140,240,240',240": Separation prevention member 150: Permanent magnet for alignment

Claims (10)

A wireless power transmission antenna for transmitting wireless power;
A shielding member made of a ferrite material to shield the magnetic field generated from the wireless power transmission antenna and including a receiving groove formed at a certain depth from one surface to accommodate the wireless power transmission antenna; and
Separation prevention provided on the shielding member to form the receiving groove in the shielding member and prevent the portion surrounding the outer edge of the wireless power transmission antenna disposed in the receiving groove from being separated from the body of the shielding member. A wireless power transmission module including a member. According to paragraph 1,
The shielding member has a plate-shaped portion having a predetermined area and a constant thickness, and a predetermined height from one surface of the plate-shaped portion so as to form the receiving groove and surround the outer edge of the wireless power transmission antenna disposed in the receiving groove. A wireless power transmission module including a first protruding portion. According to paragraph 2,
The wireless power transmission module,
It further includes; a fixing adhesive member disposed between the bottom surface of the receiving groove and one surface of the wireless power transmission antenna so as to fix one surface of the wireless power transmission antenna to the bottom surface of the receiving groove,
The separation prevention member is a separation prevention adhesive member that extends at a certain height from the edge of the fixing adhesive member so that it can be disposed on the inner surface of the first protruding portion forming the side of the receiving groove. According to paragraph 3,
A wireless power transmission module in which the separation prevention adhesive member and the fixing adhesive member are integrally formed. According to paragraph 2,
The separation prevention member is a wireless power transmission module that is an adhesive member for separation prevention disposed along the side peripheral surface of the shielding member so as to cover both the side surface of the plate-shaped portion and the outer surface of the first protruding portion. According to clause 5,
The anti-separation adhesive member includes a first part disposed along the side peripheral surface of the shielding member so as to cover both the side surface of the plate-shaped part and the outer surface of the first protruding part, and the upper surface of the first protruding part or A wireless power transmission module including a second part extending a certain length from the first part so as to cover the lower surface of the plate-shaped part. According to paragraph 1,
The separation prevention member is an adhesive tape with an adhesive layer applied to one or both sides of the substrate, or a wireless power transmission module that is an adhesive layer of an inorganic type. According to paragraph 1,
The wireless power transmission module further includes an alignment permanent magnet disposed at a central portion of the wireless power transmission antenna. According to clause 8,
A wireless power transmission module wherein the alignment permanent magnet is inserted into a placement hole formed to penetrate the bottom surface of the receiving groove. According to clause 9,
The shielding member includes a second protruding portion extending from the bottom of the receiving groove to a certain height along the edge of the placement hole,
The second protruding portion forms the receiving groove and the placement hole and surrounds the inner edge of the wireless power transmitting antenna disposed in the receiving groove.

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