Heat dissipation structure and wireless charging device thereof

Abstract

The utility model provides a heat dissipation structure and a wireless charging device thereof, the wireless charging device comprises a metal base plate, the metal base plate comprises protruding structures so as to enlarge the heat dissipation surface area of the metal base plate, and a protruding structure group formed by at least two protruding structures in the plurality of protruding structures is in one-to-one correspondence with a magnetic core in position so as to enlarge the heat dissipation surface area of the metal base plate. Therefore, the protruding structure of the metal bottom plate can take away heat energy generated by the corresponding first magnetic core, and the metal bottom plate can dissipate heat more accurately, so that the heat dissipation efficiency of the whole wireless charging device is improved, interference to the magnetic field of the magnetic core is reduced, and the operation efficiency of the coil and the magnetic core is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation structure, in particular to a heat dissipation structure with protruding structure and a wireless charging device using the same. BACKGROUND

[0002] In the operation process of the wireless charging device, power is transmitted by electromagnetic induction, which is easy to cause a considerable amount of heat energy in the magnetic components of the wireless charging device. If the magnetic components cannot be effectively cooled, it will seriously affect the charging efficiency and service life of the wireless charging device. In the current technical solutions, the wireless charging device usually uses metal material as the cover plate. Since the metal cover plate has good heat conduction performance, it can effectively dissipate heat from the inside of the wireless charging device to the outside to enhance the heat dissipation effect of the wireless charging device. However, the metal cover plate in the traditional wireless charging device is a flat structure, which cannot accurately cool the local high-temperature area inside the wireless charging device, resulting in poor heat dissipation efficiency of the wireless charging device.

[0003] Therefore, it is necessary to develop a heat dissipation structure and a wireless charging device using the same to solve the problems and defects in the prior art. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a heat dissipation structure and a wireless charging device using the same. The wireless charging device of the present application comprises a metal bottom plate, the metal bottom plate comprises a protruding structure to expand the heat dissipation surface area of the metal bottom plate, and at least two protruding structures in the plurality of protruding structures form a protruding structure group, which is one-to-one corresponding to the position of the magnetic core, so that the protruding structure of the metal bottom plate can carry away the heat energy generated by the corresponding first magnetic core, thereby enabling the metal bottom plate to more accurately dissipate heat, improving the heat dissipation efficiency of the overall wireless charging device, and reducing the magnetic field interference on the magnetic core and improving the operation performance of the coil and the magnetic core.

[0005] To achieve the above purpose, the present application provides a heat dissipation structure comprising a housing, at least one magnetic core and a metal bottom plate. The housing comprises a top surface, a side wall and an opening, the side wall surrounds the top surface, the top surface and the opening are arranged opposite to each other, and the top surface, the side wall and the opening jointly define a receiving groove. At least one magnetic core is arranged in the receiving groove. The metal bottom plate covers the opening of the housing and comprises a plurality of protruding structures, wherein the plurality of protruding structures are formed by the surface of the metal bottom plate extending towards the top surface, at least two protruding structures in the plurality of protruding structures form a protruding structure group, and each protruding structure group is one-to-one corresponding to the position of the at least one magnetic core, wherein each protruding structure comprises a protruding top surface, which is the surface of the protruding structure adjacent to the corresponding magnetic core, and the area of the protruding top surface corresponding to each protruding structure group does not exceed the area of the corresponding magnetic core.

[0006] According to one of the embodiments of the present application, the heat dissipation structure comprises a potting glue structure arranged in the accommodating groove of the shell.

[0007] According to one of the embodiments of the present application, the projection of each protruding structure group on the top surface does not exceed the projection of the corresponding magnetic core on the top surface.

[0008] According to one of the embodiments of the present application, each protruding structure of the metal bottom plate has a gap with the corresponding magnetic core.

[0009] According to one of the embodiments of the present application, the plurality of protruding structures are arranged in an array.

[0010] According to one of the embodiments of the present application, the metal bottom plate and the plurality of protruding structures are made of aluminum and are integrally formed.

[0011] According to one of the embodiments of the present application, the shape of the plurality of protruding structures includes at least one of a block shape and a cylindrical shape.

[0012] To achieve the foregoing purpose, the present application provides a wireless charging device, which comprises a shell, at least one first magnetic core, at least one coil, a metal bottom plate, and a potting glue structure. The shell comprises a top surface, a side wall, and an opening. The side wall surrounds the top surface, and the top surface and the opening are arranged oppositely. The top surface, the side wall, and the opening jointly define an accommodating groove. The at least one first magnetic core is arranged in the accommodating groove. The at least one coil is arranged in the accommodating groove, and the at least one coil is located between the top surface and the at least one first magnetic core. The metal bottom plate covers the opening of the shell and comprises a plurality of protruding structures. The plurality of protruding structures are formed by the surfaces of the metal bottom plate extending toward the top surface. At least two protruding structures in the plurality of protruding structures constitute a protruding structure group. Each protruding structure group corresponds to the at least one first magnetic core in position. Each protruding structure comprises a convex top surface, which is the surface of the protruding structure adjacent to the corresponding first magnetic core. The area of the convex top surface corresponding to each protruding structure group does not exceed the area of the corresponding first magnetic core. The potting glue structure is arranged in the accommodating groove of the shell.

[0013] According to one of the embodiments of the present application, the projection of each protruding structure group on the top surface does not exceed the projection of the corresponding first magnetic core on the top surface.

[0014] According to one of the embodiments of the present application, the wireless charging device further comprises at least one second magnetic core. The second magnetic core is located between the top surface and the at least one first magnetic core, and each coil surrounds the corresponding second magnetic core.

[0015] According to one of the embodiments of the present application, the second magnetic core is a cylinder, and the coil is an annular shape.

[0016] According to one of the embodiments of the present application, the second magnetic core is a cube, and the coil is a square.

[0017] According to one of the embodiments of the present application, the plurality of protruding structures are arranged in an array.

[0018] According to one of the embodiments of the present application, the shell comprises a fixing assembly arranged in the accommodating groove between the metal bottom plate and the top surface, the fixing assembly is fixed to the sidewall of the shell, and the plurality of first magnetic cores are clamped on the fixing assembly to fix the plurality of first magnetic cores in the shell through the fixing assembly.

[0019] According to one of the embodiments of the present application, the at least one fixing assembly is a plastic frame.

[0020] According to one of the embodiments of the present application, each protruding structure of the metal bottom plate has a gap with the corresponding first magnetic core.

[0021] According to one of the embodiments of the present application, the potting adhesive structure is located between the plurality of protruding structures of the metal bottom plate and the plurality of first magnetic cores.

[0022] According to one of the embodiments of the present application, the metal bottom plate and the plurality of protruding structures are made of aluminum and are integrally formed.

[0023] According to one of the embodiments of the present application, the shape of the plurality of protruding structures includes at least one of a block shape and a cylindrical shape. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure diagram of the wireless charging device of the first embodiment of the present application.

[0025] Figure 2A It is Figure 1 An exploded view of the structure of the wireless charging device.

[0026] Figure 2B It is Figure 1 Another angle of the structure of the wireless charging device.

[0027] Figure 3 It is Figure 1 A cross-sectional view of the wireless charging device.

[0028] Figure 4A It is an exploded view of the structure of the wireless charging device of the second embodiment of the present application.

[0029] Figure 4B It is Figure 4AAnother angle of the structure explosion view of the wireless charging device.

[0030] Figure 5A The structure explosion view of the wireless charging device of the third embodiment of the utility model.

[0031] Figure 5B For Figure 5A Another angle of the structure explosion view of the wireless charging device.

[0032] Figure 6 The structure explosion view of the wireless charging device of the fourth embodiment of the utility model.

[0033] The reference signs are as follows:

[0034] 1, 1a, 1b, 1c: wireless charging device

[0035] 2: shell

[0036] 21: top surface

[0037] 22: opening

[0038] 23: side wall

[0039] 24: accommodating groove

[0040] 3: first magnetic core

[0041] 4: coil

[0042] 5: metal bottom plate

[0043] 51: convex structure

[0044] 511: convex top surface

[0045] 512: gap

[0046] 52: surface

[0047] 6: potting glue structure

[0048] 7: second magnetic core

[0049] 8: fixing assembly

[0050] 81: flat plate structure

[0051] 82: vertical convex part

[0052] 83: through hole DETAILED DESCRIPTION

[0053] Some typical embodiments embodying features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different ways, which do not deviate from the scope of the present application, and the description and drawings in the essence are used for illustration, not for limiting the present application. For example, if the disclosure below describes a first feature disposed on or above a second feature, it means that it includes the embodiment of the disposed first feature and the second feature in direct contact, and also includes the embodiment that additional features can be disposed between the first feature and the second feature, so that the first feature and the second feature can not be in direct contact. In addition, different embodiments in the disclosure can use repeated reference symbols and / or labels. These repetitions are for the purpose of simplification and clarity, and are not intended to limit the relationship between the various embodiments and / or the appearance of the structure. Furthermore, in order to facilitate the description of the relationship between one component or feature and another (plural) component or (plural) feature in the drawing, spatially related terms such as "up", "down", "top", "bottom", "front", "back" and the like are used. In addition to the orientation shown in the drawing, the spatially related terms are used to cover different orientations of the device in use or operation. The device can also be positioned (for example, rotated by 90 degrees or in other orientations) and the description of the spatially related terms used accordingly. In addition, when a component is referred to as "connected to" or "coupled to" another component, it can be directly connected or coupled to the other component, or there can be intervening components.

[0054] Please refer to Figure 1 、 Figure 2A 、 Figure 2B and Figure 3 , wherein Figure 1 is a structural schematic diagram of a wireless charging device of the first embodiment of the present application, Figure 2A is an exploded view of the wireless charging device shown in Figure 1 , Figure 2B is another angle of the structural exploded view of the wireless charging device shown in Figure 1 , Figure 3 is a cross-sectional view of the wireless charging device shown in Figure 1 . The wireless charging device 1 of the present embodiment comprises a housing 2, a plurality of first magnetic cores 3, two coils 4, a metal bottom plate 5 and a potting glue structure 6, wherein the heat dissipation structure is composed of the housing 2, the plurality of first magnetic cores 3, the metal bottom plate 5 and the potting glue structure 6. The housing 2 comprises a top surface 21, a side wall 23 and an opening 22, the side wall 23 surrounds the top surface 21, the top surface 21 and the opening 22 are oppositely arranged, and the top surface 21, the opening 22 and the side wall 23 jointly define a receiving groove 24.

[0055] The plurality of first magnetic cores 3 are parallel to the top surface 21 and are located in the accommodation groove 24. In this embodiment, the number of first magnetic cores 3 is eight, and the first magnetic cores 3 are arranged in a rectangular array of two rows and four columns, each row and each column being perpendicular to each other. The plurality of first magnetic cores 3 are the first heat source in the wireless charging device 1. It should be particularly pointed out that the number of first magnetic cores 3 can be adjusted according to actual needs, for example, one, eight or sixteen. The two coils 4 are the second heat source in the wireless charging device 1, are in a ring structure, and are arranged in the accommodation groove 24 and between the top surface 21 and the corresponding first magnetic cores 3.

[0056] The metal bottom plate 5 covers the opening 22 of the shell 2 and comprises a plurality of protruding structures 51, each of which can be composed of aluminum and extends from the surface 52 of the metal bottom plate 5 toward the top surface 21. At least two of the plurality of protruding structures 51 form a protruding structure group, for example, two protruding structures 51 in the same column adjacent to each other form a protruding structure group. In addition, each protruding structure group corresponds to a first magnetic core 3 in position, and the metal bottom plate 5 and the plurality of protruding structures 51 are an integral structure. In this embodiment, the plurality of protruding structures 51 are block-shaped, but it should be pointed out that the disclosure is not limited thereto, and the plurality of protruding structures 51 can also be other shapes or a combination of block shapes and other shapes. In this embodiment, the plurality of protruding structures 51 are arranged in an array, the number of protruding structure groups is equal to the number of first magnetic cores 3, which is eight, and each protruding structure group corresponds to a first magnetic core 3 in position. For example, the eight protruding structure groups are arranged in a rectangular array of two rows and four columns, each row and each column being perpendicular to each other, and the eight protruding structure groups correspond to the eight first magnetic cores 3 in position. Therefore, each protruding structure 51 can take away the heat energy generated by the corresponding first magnetic core 3 to improve the efficiency of heat dissipation. It should be particularly pointed out that the number of first magnetic cores 3 and protruding structures 51 can be adjusted according to actual needs.

[0057] In this embodiment, each protruding structure 51 comprises a protruding top surface 511, which is the surface of the protruding structure 51 adjacent to the corresponding first magnetic core 3. The area of the protruding top surface 511 corresponding to each protruding structure group does not exceed the area of the corresponding first magnetic core 3, and further, the projection of each protruding structure group on the top surface 21 does not exceed the projection of the corresponding first magnetic core 3 on the top surface 21. Therefore, each protruding structure 51 only dissipates heat for the corresponding first magnetic core 3 and does not dissipate heat for other first magnetic cores 3 at the same time, which can reduce the magnetic field influence of the protruding structure 51 on the non-corresponding first magnetic core 3.

[0058] In the present embodiment, the top surface 511 of each protruding structure 51 of the metal base plate 5 has a gap 512 with the corresponding first magnetic core 3, such that each protruding structure 51 is not in direct contact with the corresponding first magnetic core 3, which can reduce the magnetic field interference on the first magnetic core 3. The potting glue structure 6 is made of a non-conductive material and is disposed in the receiving groove 24 of the housing 2, wherein at least part of the potting glue structure 6 is located between the protruding structures 51 of the metal base plate 5 and the first magnetic cores 3, so that the potting glue structure 6 can act as a heat dissipation medium between the first magnetic cores 3 and the protruding structures 51. The heat generated by most of the coils 4 is conducted to the first magnetic cores 3, and the heat of the coils 4 and the first magnetic cores 3 is further conducted to the metal base plate 5 through the potting glue structure 6 and the protruding structures 51, so as to dissipate heat by the metal base plate 5.

[0059] Please continue to refer to Figure 2A 、 Figure 2B and Figure 3 The wireless charging device 1 further comprises two second magnetic cores 7, which are the third heat source in the wireless charging device 1 and are located between the top surface 21 and the first magnetic cores 3, and each second magnetic core 7 is disposed around the corresponding coil 4. Most of the heat generated by the two second magnetic cores 7 and the coils 4 is first conducted to the first magnetic cores 3, and the heat of the second magnetic cores 7, the coils 4 and the first magnetic cores 3 is further conducted to the metal base plate 5 through the potting glue structure 6 and the protruding structures 51, so as to bring the heat away by the metal base plate 5. It should be particularly noted that the number of second magnetic cores 7 can be adjusted according to the number of coils 4, for example, the number of second magnetic cores 7 is equal to the number of coils 4, of course, not limited to. In the present embodiment, the second magnetic core 7 is a cylinder, and the coil 4 is a ring.

[0060] In an embodiment, the housing 2 comprises a fixing assembly 8, which can be but is not limited to an insulating material such as a plastic frame, and is disposed in the receiving groove 24. The fixing assembly 8 is located between the metal base plate 5 and the top surface 21, and is fixed to the side wall 23 of the housing 2, wherein the first magnetic cores 3 are clamped on the fixing assembly 8 to fix the first magnetic cores 3 in the housing 2 through the fixing assembly 8.

[0061] In one embodiment, the fixing assembly 8 comprises a flat plate structure 81, a plurality of vertical protrusions 82, and a plurality of through holes 83. The flat plate structure 81 is parallel to the top surface 21, wherein the first magnetic cores 3 are arranged on a side of the flat plate structure 81 away from the metal bottom plate 5. The plurality of vertical protrusions 82 are formed on opposite sides of the flat plate structure 81 and are perpendicular to the flat plate structure 81. The plurality of through holes 83 are formed on the flat plate structure 81, and the shapes of the through holes 83 correspond to the shapes of the protruding top surfaces 511 of the protruding structures 51, for example, the shapes of the through holes 83 and the protruding top surfaces 511 are rectangular. Each first magnetic core 3 is exposed in the shell 2 through the corresponding through hole 83 and is arranged corresponding to the corresponding protruding structure 51, so that the plurality of first magnetic cores 3 and the protruding structures 51 exchange heat.

[0062] Please refer to Figure 4A and Figure 4B , wherein Figure 4A is a structure explosion diagram of a wireless charging device of a second embodiment of the present application, Figure 4B is Figure 4A a structure explosion diagram of the wireless charging device from another angle. Compared with the wireless charging device 1 of Figure 2A and Figure 2B , the protruding structure 51 of the wireless charging device 1a of the present embodiment is a cylindrical shape, and the protruding top surface 511 on the protruding structure 51 is a circular shape, and the through hole 83 of the fixing assembly 8 is a circular through hole. Therefore, the shape of the through hole 83 of the fixing assembly 8 corresponds to the shape of the protruding top surface 511 of the protruding structure 51, so that each protruding structure 51 only performs heat dissipation on the corresponding first magnetic core 3, and does not simultaneously perform heat dissipation on other first magnetic cores 3, which can reduce the magnetic field influence of the protruding structure 51 on the non-corresponding first magnetic core 3. In the present embodiment, the shape of the protruding structure 51 is a cylindrical shape, but it should be noted that the present disclosure is not limited thereto, and the shape of the protruding structure 51 can also be other shapes or a combination of a cylindrical shape and other shapes.

[0063] Please refer to Figure 5A and Figure 5B , Figure 5A is a structure explosion diagram of a wireless charging device of a third embodiment of the present application, Figure 5B is Figure 5A a structure explosion diagram of the wireless charging device from another angle. Compared with the wireless charging device 1 of Figure 2A and Figure 2B , the number of first magnetic cores 3 of the wireless charging device 1b of the present embodiment is only one, and the eight protruding structure groups correspond to one first magnetic core 3. By increasing the design of the protruding structure 51, the surface area of the metal bottom plate 5 can be increased to improve the overall heat dissipation efficiency of the wireless charging device 1b.

[0064] Please refer toFigure 6 , the wireless charging device of the fourth embodiment of the utility model is the structure explosion map. Figure 2A and 2B The second magnetic core 7 of the wireless charging device 1 is a cylinder, and the coil 4 is annular, the second magnetic core 7 of the wireless charging device 1c of the embodiment is a cube, and the coil 4 is square.In other embodiments, the shape of the second magnetic core 7 and the coil 4 is not limited by the utility model.

[0065] In summary, the utility model provides a heat dissipation structure and wireless charging device suitable for it.The wireless charging device of the utility model includes a metal base plate, the metal base plate includes a convex structure to expand the heat dissipation surface area of the metal base plate, and because each convex structure of the metal base plate of the utility model corresponds to the magnetic core in position, the convex structure of the metal base plate can take away the heat energy generated by the corresponding first magnetic core, and the metal base plate can dissipate heat more accurately, thereby improving the heat dissipation efficiency of the overall wireless charging device, reducing the magnetic field interference on the magnetic core and improving the operation efficiency of the coil and the magnetic core.

[0066] The utility model can be modified by the person skilled in the art, but it does not deviate from the protection scope of the appended claims.

Claims

1. A heat dissipating structure, characterized by comprising: The heat dissipation structure comprises a potting structure disposed in the accommodating groove of the housing. The projection of each of the protruding structure groups on the top surface does not exceed the projection of the corresponding first magnetic core on the top surface. The wireless charging device further comprises at least one second magnetic core, the second magnetic core is located between the top surface and the at least one first magnetic core, and each of the coils surrounds the corresponding second magnetic core. The second magnetic core is a cylinder, and the coil is a ring. The second magnetic core is a cube, and the coil is a square.

2. The heat dissipating structure according to claim 1, wherein The plurality of protruding structures are arranged in an array.

3. The heat dissipating structure according to claim 1, wherein The housing comprises a fixing assembly disposed in the accommodating groove and located between the metal bottom plate and the top surface, the fixing assembly is fixed to the side wall of the housing, and the plurality of first magnetic cores are clamped on the fixing assembly to fix the plurality of first magnetic cores in the housing through the fixing assembly.

4. The heat dissipating structure according to claim 1, wherein The plurality of protruding structures are arranged in an array.

5. The heat dissipating structure according to claim 1, wherein The metal bottom plate and the plurality of protruding structures are made of aluminum and are an integral structure.

6. The heat dissipating structure of claim 1, wherein The shape of the plurality of protruding structures includes at least one of a block shape and a cylindrical shape.

7. The heat dissipating structure according to claim 1, wherein The heat dissipation structure comprises a potting structure disposed in the accommodating groove of the housing.

8. A wireless charging device, comprising: The projection of each of the protruding structure groups on the top surface does not exceed the projection of the corresponding first magnetic core on the top surface. The wireless charging device further comprises at least one second magnetic core, the second magnetic core is located between the top surface and the at least one first magnetic core, and each of the coils surrounds the corresponding second magnetic core. The second magnetic core is a cylinder, and the coil is a ring. The second magnetic core is a cube, and the coil is a square. The plurality of protruding structures are arranged in an array. The housing comprises a fixing assembly disposed in the accommodating groove and located between the metal bottom plate and the top surface, the fixing assembly is fixed to the side wall of the housing, and the plurality of first magnetic cores are clamped on the fixing assembly to fix the plurality of first magnetic cores in the housing through the fixing assembly. ​ 9. The wireless charging device of claim 8, wherein, ​ 10. The wireless charging device of claim 8, wherein, ​ 11. The wireless charging device of claim 10, wherein, ​ 12. The wireless charging device of claim 10, wherein, ​ 13. The wireless charging device of claim 8, wherein, ​ 14. The wireless charging device of claim 8, wherein, ​ 15. The wireless charging device of claim 14, wherein, The at least one fixing component is a plastic frame.

16. The wireless charging device of claim 8, wherein, Each of the protruding structures of the metal base plate has a gap with the corresponding first magnetic core.

17. The wireless charging device of claim 8, wherein, The potting glue structure is located between the protruding structures and the first magnetic cores of the metal base plate.

18. The wireless charging device of claim 8, wherein, The metal base plate and the protruding structures are made of aluminum and are an integral structure.

19. The wireless charging device of claim 8, wherein, The shapes of the protruding structures include at least one of a block shape and a cylindrical shape. The shapes of the protruding structures include at least one of a block shape and a cylindrical shape.

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