Wireless charging phase change cooling structure and wireless charger

Abstract

The application relates to the technical field of wireless charging, and discloses a phase change cooling structure for wireless charging and a wireless charger, which comprises a packaging shell, a packaging inner cavity is arranged in the packaging shell, and a phase change material layer is filled in the packaging inner cavity; a containing groove is formed on the outer surface of one side of the packaging shell, a wireless charging coil is arranged in the containing groove, a wire groove is communicated with the containing groove, the wire groove extends to the outer edge of the packaging shell, and the wire groove is used for containing the cable of the wireless charging coil. The phase change cooling structure solves the problem that the wireless charging coil and the phase change material assembly are prone to deviation when being connected, and are not conducive to assembly into a module.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology, and more particularly to a phase change cooling structure for wireless charging and a wireless charger. Background Technology

[0002] Chargers generate heat during charging, especially wireless chargers. This is because a large current (usually over 1A) flows through the wireless charging coil, which, according to Joule's law (P=I), causes the current to rise. 2 The coil generates significant heat during wireless charging. Furthermore, hysteresis and eddy current losses occur during wireless charging, and this energy is also converted into heat. The coil is one of the largest heat sources in the entire system during wireless charging. Severe heat generation not only affects the performance and lifespan of electronic components but also poses safety risks during use. Therefore, wireless charging devices need to address the heat dissipation problem.

[0003] Existing wireless chargers employ phase change materials (PCMs) for cooling, as illustrated in patent CN215528704U, entitled "A Wireless Charging Device Based on Phase Change Heat Dissipation." This patent discloses a cavity formed between the panel assembly and the charging coil, with a PCM assembly housed within the cavity. This structure first installs the wireless charging coil and then fills it with PCM to achieve its function. However, it lacks a modular design, making assembly difficult. Furthermore, in existing assembly methods, to improve the heat absorption performance of the PCM, the PCM assembly is typically made relatively large to store more material. This can lead to unstable connections and vibration when attaching the wireless charging coil (coil module) to the PCM assembly, causing misalignment of the coil module during assembly. This further complicates assembly.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a phase change cooling structure for wireless charging and a wireless charger, so as to solve the problem that the wireless charging coil and the phase change material component are easily misaligned when connected, which is not conducive to the assembly into a module.

[0006] The technical solution of this application is as follows:

[0007] On the one hand, this application proposes a phase change cooling structure for wireless charging, including a packaging shell, an inner packaging cavity provided inside the packaging shell, and a phase change material layer filled inside the inner packaging cavity.

[0008] A receiving groove is formed on one outer surface of the package shell, a wireless charging coil is placed in the receiving groove, and a wire groove is connected to the receiving groove. The wire groove extends to the outer edge of the package shell and is used to accommodate the cable of the wireless charging coil.

[0009] Optionally, the encapsulation shell includes a first housing, the first housing being horizontally disposed and having a first outer surface;

[0010] The first outer surface is recessed to form a receiving groove, and the wireless charging coil includes a base, which is disposed in the receiving groove.

[0011] Optionally, a limiting ring is provided in the receiving groove, and a metal heat-conducting plate is fixedly installed in the limiting ring. One side of the metal heat-conducting plate is connected to the inner cavity of the package, and the other side abuts against the base of the wireless charging coil.

[0012] Optionally, a heat-conducting opening penetrating one side of the inner wall of the packaging shell is provided inside the limiting ring, and a metal heat-conducting plate is fixed inside the limiting ring and covers the heat-conducting opening.

[0013] Optionally, the surface of the metal heat-conducting plate protrudes beyond the surface of the limiting ring.

[0014] Optionally, a thermally conductive adhesive layer is provided on the outer side of the limiting ring.

[0015] Optionally, the metal heat-conducting plate includes a first plate layer and a second plate layer, with a step formed between the first plate layer and the second plate layer;

[0016] The second plate is located inside the thermally conductive opening and protrudes into the encapsulation cavity.

[0017] Optionally, the encapsulation shell also includes a second shell, which is vertically disposed at one end of the first shell, and the second shell is filled with a phase change material layer.

[0018] On the other hand, this application also proposes a wireless charger, including a charging case and a phase change cooling structure for wireless charging as described above, disposed inside the charging case.

[0019] Optionally, a rechargeable battery is also provided inside the charging case, and the encapsulation shell of the phase change cooling structure for wireless charging is disposed on the rechargeable battery, with the wireless charging coil of the phase change cooling structure for wireless charging located on the side of the encapsulation shell away from the rechargeable battery.

[0020] The phase change cooling structure for wireless charging and the beneficial effects of the wireless charger provided in this application are at least as follows: By filling the encapsulation shell with a phase change material layer and setting the wireless charging coil on the encapsulation shell, when the wireless charging coil generates heat during wireless charging, the heat can be absorbed by the internal phase change material layer through the encapsulation shell, thereby achieving a cooling function. The wireless charging coil can be accommodated in a receiving groove on one outer surface of the encapsulation shell, and the cable connected to the wireless charging coil is placed in the receiving groove; this limits the wireless charging coil within the receiving groove during installation, fixing its installation position, making installation easier, and ensuring stable positioning during use, thus improving product quality. Furthermore, by assembling the encapsulation shell filled with the phase change material layer and the wireless charging coil into a wireless coil module, and using the wireless coil module as a whole, the assembly of the wireless charger is more convenient and production efficiency is higher. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a phase change cooling structure for wireless charging according to an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of a second structure of a phase change cooling structure for wireless charging according to an embodiment of this application.

[0023] Figure 3 An exploded view of a second structure of a phase change cooling structure for wireless charging according to an embodiment of this application;

[0024] Figure 4 for Figure 3 Enlarged view of point A;

[0025] Figure 5 This is a cross-sectional view of a wireless charger according to an embodiment of this application.

[0026] The following are the labels in the diagram: 10, Phase change cooling structure; 100, Encapsulation shell; 110, Receiving groove; 111, Limiting ring; 112, Thermally conductive opening; 120, Wire groove; 130, First shell; 140, Second shell; 150, Metal heat-conducting plate; 151, First plate layer; 152, Second plate layer; 160, Thermally conductive adhesive layer; 200, Wireless charging coil; 210, Base; 220, Cable; 300, Phase change material layer; 20, Charging shell; 21, Rechargeable battery. Detailed Implementation

[0027] This application provides a phase change cooling structure for wireless charging. To make the purpose, technical solution, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0028] It should be noted that in annotations, leader lines with arrows represent non-solid areas such as holes and slots, or non-specific solid features such as higher-level features, or specific directions. Leader lines without arrows represent solid features or specific lower-level features.

[0029] When a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings and are for ease of description only, and should not be construed as limiting the scope of the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality of" means two or more, unless otherwise explicitly defined.

[0030] Example 1

[0031] like Figure 1 , Figure 3 , Figure 5As shown, this application proposes a phase change cooling structure 10 for wireless charging, mainly including: a packaging shell 100, which can be disc-shaped, square, or other shapes. For example, when this phase change cooling structure 10 for wireless charging is applied to a power bank, the power bank is usually square, so the packaging shell 100 in this embodiment is also square. Taking the horizontal placement of the packaging shell 100 as an example, the horizontally placed packaging shell 100 has an upper surface and a lower surface. An inner cavity is formed inside the packaging shell 100, and the inner cavity is filled with a phase change material layer 300. First, an opening is made on the side of the packaging shell 100. After the phase change material layer 300 fills the entire inner cavity, the opening is sealed, thereby sealing the phase change material layer 300 in the inner cavity. The phase change material used in the phase change material layer 300 is a substance that can undergo a physical state change at a specific temperature and absorb and store a large amount of latent heat in the process. A receiving groove 110 is formed on one outer surface of the encapsulation shell 100. A wireless charging coil 200 is disposed in the receiving groove 110. A wire groove 120 is connected to the receiving groove 110 and extends to the outer edge of the encapsulation shell 100. The wire groove 120 is used to accommodate the cable 220 of the wireless charging coil 200. The receiving groove 110 and the wire groove 120 allow the wireless charging coil 200 to be better installed on the encapsulation shell 100, enabling it to be used in combination with the phase change material layer 300. Therefore, the phase change cooling structure 10 for wireless charging in this embodiment, by filling the encapsulation shell 100 with the phase change material layer 300 and disposing of the wireless charging coil 200 on the encapsulation shell 100, allows the heat generated during wireless charging to be absorbed by the internal phase change material layer 300 through the encapsulation shell 100, thereby achieving a cooling function. The wireless charging coil 200 can be accommodated in a receiving groove 110 on one outer surface of the encapsulation shell 100, and the cable 220 connected to the wireless charging coil 200 is placed in the receiving groove 110. This design limits the wireless charging coil within the receiving groove 110 during installation, fixing its position and facilitating installation. Furthermore, it ensures stable positioning during use, improving product quality. Additionally, by assembling the encapsulation shell 100 filled with the phase change material layer 300 and the wireless charging coil 200 to form a wireless coil module, and using the wireless coil module as a whole, the assembly of the wireless charger becomes more convenient and production efficiency is higher.

[0032] like Figure 1 , Figure 2 As shown, the encapsulation shell 100 in this embodiment can take various forms, specifically:

[0033] like Figure 1As shown, in the first form, the encapsulation shell 100 includes only a first shell 130, which can be a horizontally arranged square structure. The upper surface of the first shell 130 is the first outer surface. A receiving groove 110 is typically recessed on the first outer surface. The receiving groove 110 is still separated from the internal encapsulation cavity by the shell wall, which allows for heat conduction. The wireless charging coil 200 includes a base 210 and a coil located on the base 210. The base 210 is thermally conductive, allowing it to conduct the heat generated by the coil and the heat generated by the coil itself. The shape of the base 210 matches the shape of the receiving groove 110. For example, if the base 210 is circular, the upper opening of the receiving groove 110 is also circular. When the wireless charging coil 200 is installed in the receiving groove 110, the entire base 210 is confined within the receiving groove 110. This effectively limits the position of the base 210 by the inner wall of the receiving groove 110, making the wireless charging coil 200 more stably installed on the encapsulation shell 100.

[0034] like Figure 2 , Figure 5 As shown, in the second form, the encapsulation shell 100 includes a first shell 130 and a second shell 140. The first shell 130 extends horizontally by a certain distance, and the second shell 140 extends vertically by a certain distance. The second shell 140 is integrally formed at one end of the length direction of the first shell 130 and protrudes downward from the lower surface of the first shell 130. The second shell 140 and the first shell 130 are internally connected, thus forming an L-shaped encapsulation cavity. This allows both the first shell 130 and the second shell 140 to be filled with a phase change material layer 300, thereby accommodating more phase change material. In particular, this encapsulation shell 100 structure is suitable for power banks with a relatively long length. If the power bank is designed to be relatively thin, its length can be appropriately increased in the length direction. This creates a gap between the battery and the shell in the length direction. By covering the battery surface with the first shell 130 and placing the second shell 140 in this gap, the capacity of the filled phase change material layer 300 can be increased without increasing the thickness of the power bank, thereby improving the heat absorption capacity of the wireless charging coil 200.

[0035] like Figure 3 , Figure 4 , Figure 5As shown, further, based on the above two structures, a limiting ring 111 is provided inside the receiving groove 110. The limiting ring 111 protrudes from the inner bottom surface of the receiving groove 110, thus forming an inner limiting space. A metal heat-conducting plate 150 is fixedly installed inside the limiting ring 111. The metal heat-conducting plate 150 may be made of aluminum plate. One side of the metal heat-conducting plate 150 is connected to the inner cavity of the package, and the other side abuts against the base 210 of the wireless charging coil 200. By bonding and fixing the metal heat-conducting plate 150 inside the receiving groove 110, the metal heat-conducting plate 150 has a high efficiency of heat conduction. After the upper surface of the metal heat-conducting plate 150 contacts and is fixed to the base of the wireless charging coil 200, the lower surface contacts and is fixed to the inner bottom surface of the receiving groove 110, thereby quickly conducting the heat generated by the wireless charging coil 200 during operation to the package shell 100, where it is absorbed by the phase change material layer 300, achieving a high efficiency of heat dissipation.

[0036] The inner bottom surface of the receiving groove 110 can be either closed or open. When closed, the metal heat-conducting plate 150 is directly bonded and fixed to the inner bottom surface of the receiving groove 110 to achieve heat conduction.

[0037] like Figure 3 , Figure 4 , Figure 5 As shown, if an open type is adopted, its specific structure is as follows: A heat-conducting opening 112 is provided inside the limiting ring 111, penetrating the inner wall of one side of the encapsulation shell 100. A metal heat-conducting plate 150 is fixed inside the limiting ring 111 and covers the heat-conducting opening 112. The heat-conducting opening 112 penetrates the upper inner wall of the encapsulation shell 100, thereby forming an opening in the limiting ring 111 that communicates with the inner cavity of the encapsulation. When the edge of the metal heat-conducting plate 150 is fixed inside the limiting ring 111 by adhesive bonding, the metal heat-conducting plate 150, as the sealed inner wall of the encapsulation cavity, can directly contact the phase change material layer 300 inside it, thereby directly conducting the heat of the wireless charging coil 200 to the phase change material layer 300 through the metal heat-conducting plate 150, making the heat conduction more efficient.

[0038] To ensure better contact between the metal heat-conducting plate 150, which is disposed within the limiting ring 111, and the base 210 of the wireless charging coil 200, the surface of the metal heat-conducting plate 150 protrudes beyond the surface of the limiting ring 111. This upward protrusion of the upper surface of the metal heat-conducting plate 150 prevents interference between the surface of the limiting ring 111 and the base 210 of the wireless charging coil 200, thus avoiding the problem of the metal heat-conducting plate 150 failing to contact the lower surface of the base 210. Therefore, the upward protrusion of the metal heat-conducting plate 150 typically allows it to preferentially contact the base 210 of the wireless charging coil 200, ensuring that the entire upper surface of the metal heat-conducting plate 150 is in contact with the base 210, thereby improving heat dissipation efficiency.

[0039] like Figure 3 , Figure 4 , Figure 5 As shown, a thermally conductive adhesive layer 160 is further provided on the outer side of the limiting ring 111. The thermally conductive adhesive layer 160 enables the area outside the metal heat-conducting plate 150 to achieve stable contact with the base 210 of the wireless charging coil 200. In the specific structure, the thermally conductive adhesive layer 160 can be made of thermally conductive silicone, which can be deformed under pressure. In this way, when the area of ​​the base that is not in contact with the metal heat-conducting plate 150, that is, the annular area of ​​the edge of the base (the area outside the metal heat-conducting plate 150), is still located in the receiving groove 110, the thermally conductive adhesive layer 160 can contact the inner bottom surface of the receiving groove 110 below, thereby achieving heat conduction. This allows the entire bottom surface of the base to achieve contact heat dissipation, thereby improving the heat conduction efficiency.

[0040] like Figure 3 , Figure 5 As shown, the metal heat-conducting plate 150 further includes a first plate layer 151 and a second plate layer 152, with a step formed between the first plate layer 151 and the second plate layer 152. The first plate layer 151 is located above the second plate layer 152, and the outer diameter of the first plate layer is larger than that of the second plate layer. Therefore, after the step is formed, it cooperates with the inner bottom surface of the limiting ring 111 at the step, thereby achieving stable bonding and fixation of the metal heat-conducting plate 150 within the limiting ring 111. Furthermore, the second plate layer 152 extends downwards by a predetermined length, so that the second plate layer 152 is located within the heat-conducting opening 112 and protrudes into the encapsulation cavity. This allows the outer surface of the second plate layer 152 to directly contact the internal phase change material layer 300, improving heat conduction efficiency and heat transfer uniformity, and further facilitating heat absorption by the phase change material layer 300.

[0041] Example 2

[0042] This embodiment proposes a wireless charger. The wireless charger may be without a rechargeable battery, such as a wireless charging dock that requires an external power source, or it may have a rechargeable battery, such as a wireless power bank.

[0043] refer to Figure 5 The wireless charger specifically includes a charging case 20 and a wireless charging phase change cooling structure 10 as described above, which is disposed inside the charging case 20.

[0044] like Figure 5 As shown, when the wireless charger is a wireless power bank, a rechargeable battery 21 is also provided inside the charging case 20. The encapsulation shell 100 of the phase change cooling structure 10 for wireless charging is disposed on the rechargeable battery 21, and the wireless charging coil 200 of the phase change cooling structure 10 for wireless charging is located on the side of the encapsulation shell 100 away from the rechargeable battery 21.

[0045] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A phase change cooling structure for wireless charging, characterized in that, The package includes a packaging shell, which has an inner packaging cavity filled with a phase change material layer. A receiving groove is formed on one outer surface of the encapsulation shell, a wireless charging coil is disposed in the receiving groove, and a wire groove is connected to the receiving groove, the wire groove extending to the outer edge of the encapsulation shell, the wire groove being used to accommodate the cable of the wireless charging coil.

2. The phase change cooling structure for wireless charging according to claim 1, characterized in that, The encapsulation shell includes a first housing, which is horizontally disposed and has a first outer surface; The receiving groove is formed by recessing the first outer surface, and the wireless charging coil includes a base, which is disposed in the receiving groove.

3. The phase change cooling structure for wireless charging according to claim 2, characterized in that, A limiting ring is provided in the accommodating groove, and a metal heat-conducting plate is fixedly installed in the limiting ring. One side of the metal heat-conducting plate is connected to the inner cavity of the package, and the other side abuts against the base of the wireless charging coil.

4. The phase change cooling structure for wireless charging according to claim 3, characterized in that, The limiting ring has a heat-conducting opening that penetrates the inner wall of one side of the packaging shell, and the metal heat-conducting plate is fixed inside the limiting ring and covers the heat-conducting opening.

5. The phase change cooling structure for wireless charging according to claim 4, characterized in that, The surface of the metal heat-conducting plate protrudes from the surface of the limiting ring.

6. The phase change cooling structure for wireless charging according to claim 5, characterized in that, A thermally conductive adhesive layer is provided on the outer side of the limiting ring.

7. The phase change cooling structure for wireless charging according to claim 4, characterized in that, The metal heat-conducting plate includes a first plate layer and a second plate layer, with a step formed between the first plate layer and the second plate layer; The second plate is located within the thermally conductive opening and protrudes into the encapsulation cavity.

8. The phase change cooling structure for wireless charging according to claim 2, characterized in that, The encapsulation shell also includes a second shell, which is vertically disposed at one end of the first shell, and the second shell is filled with the phase change material layer.

9. A wireless charger, characterized in that, It includes a charging case and a phase change cooling structure for wireless charging as described in any one of claims 1-8 disposed within the charging case, wherein the phase change cooling structure for wireless charging is disposed within the charging case.

10. The wireless charger according to claim 9, characterized in that, The charging case also contains a rechargeable battery. The encapsulation shell of the wireless charging phase change cooling structure is disposed on the rechargeable battery, and the wireless charging coil of the wireless charging phase change cooling structure is located on the side of the encapsulation shell away from the rechargeable battery.

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