Novel wireless power bank structure

Abstract

The application relates to the technical field of power banks, in particular to a novel wireless power bank structure which comprises a shell, a mounting chamber is arranged in the shell, a battery assembly is arranged in the mounting chamber, a wireless charging assembly is arranged in the mounting chamber and located at one side of the battery assembly, an electronic refrigeration sheet is arranged in the mounting chamber, the electronic refrigeration sheet has a refrigeration surface and a heating surface, a first heat conduction assembly is arranged between the battery assembly and the wireless charging assembly, the first heat conduction assembly is in heat conduction contact with the wireless charging assembly, the first heat conduction assembly extends to the electronic refrigeration sheet and is in heat conduction contact with the refrigeration surface of the electronic refrigeration sheet, and a second heat conduction assembly is in heat conduction contact with the heating surface of the electronic refrigeration sheet and simultaneously in heat conduction contact with the inner wall of the mounting chamber. The advantage lies in that the existing wireless power bank is optimized to solve the heat management contradiction problem caused by the forced close arrangement of the battery assembly and the wireless charging assembly for the pursuit of thinness.

Description

Technical Field

[0001] This application relates to the field of power bank technology, and in particular to a novel wireless power bank structure. Background Technology

[0002] With the widespread use of portable electronic devices, wireless power banks have become an essential accessory in modern life. Traditional wireless power banks generally use lithium battery components for power, achieving wireless energy transfer through electromagnetic induction principles (such as the Qi standard). However, during wireless charging, factors such as coil eddy current losses generate a significant amount of heat. Especially when supporting fast charging of 15W and above, the local temperature can exceed 50°C within 10 minutes. High temperatures not only cause a sharp drop in charging efficiency (energy conversion loss increases by 15%-30%), but also pose risks such as decreased battery safety and electronic component failure. Furthermore, high temperatures can trigger device protection mechanisms, leading to charging interruptions and deteriorating the user experience.

[0003] However, existing wireless power banks suffer from thermal management contradictions caused by their structural design. For example, in pursuit of thinness and lightness, the battery component (usually accounting for more than 60% of the volume) and the wireless charging component are forced to be arranged close together. This makes the battery the main thermal buffer, and its cycle life decreases by about 20% for every 10°C increase in temperature (Arrhenius effect). There is a fundamental conflict between the heat insulation requirements between the coil and the battery and the system heat dissipation requirements, and ordinary heat insulation materials further hinder heat conduction.

[0004] For example, the patent publication document CN219513809U discloses a space-concentrated wireless power bank in which the wireless charging module is closely close to the battery. The heat generated by the wireless charging module when it is working will directly affect the battery. As a result, in order to pursue thinness, the battery component and the wireless charging component are forced to be arranged close to each other, which makes the battery the main heat buffer and brings about thermal management contradictions and defects.

[0005] Therefore, there is an urgent need to develop an innovative thermal management architecture to optimize the thermal management contradictions caused by the forced close arrangement of battery components and wireless charging components in the pursuit of thinness and lightness in existing wireless power banks. Utility Model Content

[0006] The purpose of this application is to propose a novel wireless power bank structure that optimizes the thermal management problem caused by the forced close arrangement of battery components and wireless charging components in the pursuit of thinness and lightness in existing wireless power banks.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A novel wireless charging bank structure includes: a housing with an internal mounting chamber; a battery assembly disposed within the mounting chamber; a wireless charging assembly disposed within the mounting chamber, located on one side of the battery assembly; an electronic cooling chip disposed within the mounting chamber, the electronic cooling chip having a cooling surface and a heating surface; a first thermally conductive component disposed between the battery assembly and the wireless charging assembly, the first thermally conductive component being in thermal contact with the wireless charging assembly and extending to the electronic cooling chip, making thermal contact with the cooling surface of the electronic cooling chip; and a second thermally conductive component making thermal contact with the heating surface of the electronic cooling chip and simultaneously making thermal contact with the inner wall of the mounting chamber.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the battery assembly is disposed in the mounting cavity with the thickness direction of the housing being consistent with the thickness direction of the housing; the wireless charging assembly is disposed on one side of the battery assembly in the thickness direction; the mounting cavity has a mounting area, which is located on one side surrounding the thickness direction of the battery assembly, and the electronic cooling chip is disposed in the mounting area.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: both the housing and the battery assembly are rectangular, the battery assembly is attached to one end of the housing along its length, and the mounting area is located inside the housing at one end away from the battery assembly.

[0011] Based on the above scheme and as a preferred embodiment: both the first thermal conductive component and the second thermal conductive component are L-shaped; one end of the L-shaped first thermal conductive component is disposed between the battery assembly and the wireless charging assembly, and the other end extends into the mounting area parallel to the thickness direction of the battery assembly; one end of the L-shaped second thermal conductive component is disposed between the battery assembly and the inner wall of the mounting chamber, and the other end extends into the mounting area, with the ends of the second thermal conductive component and the first thermal conductive component located in the mounting area being parallel to each other and facing each other; the electronic cooling chip is disposed between the first thermal conductive component and the second thermal conductive component in the mounting area.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: both the first heat-conducting component and the second heat-conducting component are provided with mutually bonded metal heat-conducting layers and graphene heat-conducting layers.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: the first heat-conducting component makes heat-conducting contact with the cooling surfaces of the wireless charging component and the electronic cooling chip simultaneously through the metal heat-conducting layer; the second heat-conducting component makes heat-conducting contact with the inner wall of the mounting chamber and the heating surface of the electronic cooling chip simultaneously through the metal heat-conducting layer.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: the first thermal conductive component and / or the second thermal conductive component are made of metal or graphene.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme: a heat insulation layer is provided between the battery assembly and the first heat-conducting component and / or the second heat-conducting component.

[0016] Based on the above solution and as a preferred embodiment of the above solution: the housing is made of metal, and one or more sides of the outer surface of the housing are provided with an infrared radiation heat dissipation coating.

[0017] Based on the above solution and as a preferred embodiment of the above solution: the wireless charging component includes a magnetic shielding sheet disposed close to the first heat-conducting component, and a wireless charging coil is disposed on the side of the magnetic shielding sheet away from the battery component.

[0018] To address the thermal management challenges arising from the forced close proximity of battery and wireless charging components in existing wireless power banks designed for thinner and lighter designs, this application offers the following advantages:

[0019] The novel wireless charging bank structure of this application uses an electronic cooling chip to actively cool the wireless charging component located next to the battery assembly, thereby preventing the high temperature generated by the wireless charging component during operation from causing heat concentration and abnormal temperature during the operation of the power bank.

[0020] Specifically, the wireless charging component is positioned on one side of the battery assembly, maintaining a slim and compact structure. Cooling is achieved through a cooling surface of an electronic cooling chip, with the resulting temperature transferred to the wireless charging component via a first heat-conducting component. Simultaneously, the heat generated by the heating surface of the electronic cooling chip during operation is promptly transferred to the housing via a second heat-conducting component, allowing for large-area heat dissipation. Due to the large heat dissipation area of ​​the housing, the heat dissipation effect is excellent, preventing heat concentration and overheating.

[0021] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be further described in detail below with reference to figures. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the novel wireless charging bank structure after the shell of this application has been partially cut apart;

[0024] Figure 2 This is an exploded view of the assembly of the novel wireless power bank of this application.

[0025] Figure 3 This is a cross-sectional view of the novel wireless power bank of this application;

[0026] Figure 4 This is a schematic diagram of the casing of this application;

[0027] Figure 5 This is an exploded view of the first or second thermally conductive component of this application;

[0028] Figure 6 This is an exploded view of the wireless charging component assembly of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Housing; 101. Mounting chamber; 102. Box body; 103. Cover; 104. Infrared radiation heat dissipation coating; 105. Mounting area; 200. Battery assembly; 300. Wireless charging assembly; 301. Magnetic shielding sheet; 302. Wireless charging coil; 303. Magnetic ring; 400. Electronic cooling chip; 500. First heat conduction assembly; 501. Metal heat conduction layer; 502. Graphene heat conduction layer; 600. Second heat conduction assembly; 700. Heat insulation layer; 800. PCB board. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that 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 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" means two or more, unless otherwise explicitly defined.

[0033] See Figure 1-6 This application discloses a novel wireless power bank structure. Compared with the traditional wireless power bank structure, this structure has the advantage of maintaining a compact and lightweight layout, while solving the thermal management contradiction caused by the forced close arrangement of the battery component 200 and the wireless charging component 300.

[0034] In the embodiments of this disclosure, such as Figure 1-3 As shown, the structure of this novel wireless power bank includes a housing 100, a battery assembly 200, a wireless charging assembly 300, an electronic cooling chip 400, a first heat-conducting assembly 500, and a second heat-conducting assembly 600. The housing 100 has an internal mounting chamber 101, in which the battery assembly 200, wireless charging assembly 300, electronic cooling chip 400, first heat-conducting assembly 500, and second heat-conducting assembly 600 are all housed. The wireless charging component 300 is disposed on one side of the battery component 200; the electronic cooling chip 400 has a cooling surface and a heating surface; the first heat-conducting component 500 is disposed between the battery component 200 and the wireless charging component 300, the first heat-conducting component 500 is in thermal contact with the wireless charging component 300, and the first heat-conducting component 500 extends to the electronic cooling chip 400 and is in thermal contact with the cooling surface of the electronic cooling chip 400; the second heat-conducting component 600 is in thermal contact with the heating surface of the electronic cooling chip 400 and is also in thermal contact with the inner wall of the mounting chamber 101.

[0035] This novel wireless charging bank structure utilizes an electronic cooling element 400 for active cooling, which proactively cools the wireless charging component 300 located adjacent to the battery assembly 200. This prevents heat concentration and abnormal temperatures caused by the high temperatures generated by the wireless charging component 300 during operation. Specifically, the wireless charging component 300 is positioned on one side of the battery assembly 200, maintaining a slim and compact structure. Cooling is achieved through the cooling surface of the electronic cooling element 400, and the resulting cooling temperature is conducted to the wireless charging component 300 via the first heat-conducting component 500. Simultaneously, the heat generated by the heating surface of the electronic cooling element 400 during operation is promptly conducted to the housing 100 via the second heat-conducting component 600, allowing for large-area heat dissipation. Due to the large heat dissipation area of ​​the housing 100, the heat dissipation effect is excellent, preventing heat concentration and overheating.

[0036] Meanwhile, the cooling heat from the first heat-conducting component 500 can also radiate a certain amount to the battery component 200, thus cooling the battery component 200. The second heat-conducting component 600 conducts heat to the housing 100 for dissipation. The housing 100 has a very large heat dissipation area and good heat exchange with the air, effectively suppressing abnormal temperature rises during the wireless charging bank's operation. It is important to note that both the electronic cooling element 400 and the wireless charging component 300 are powered by the battery component 200. The cooling function of the electronic cooling element 400 is mainly used to suppress the heat generated when the wireless charging component 300 operates at high power, aiming to keep the overall temperature of the power bank below 40°C. Therefore, it achieves low power consumption, ensuring that the battery component 200 is not excessively drained.

[0037] In this embodiment, it can be considered that the temperature generated by the normal operation of the battery component 200 will not be too high, so the battery component 200 does not have a necessary separate cooling requirement. Therefore, a heat insulation layer 700 is provided between the battery component 200 and the first heat-conducting component 500 and / or the second heat-conducting component 600. For example, heat insulation layers 700 can be provided simultaneously or selectively between the battery component 200 and the first heat-conducting component 500, and between the battery component 200 and the second heat-conducting component 600. Preferably, heat insulation layers 700 are provided simultaneously between the battery component 200 and the first heat-conducting component 500, and between the battery component 200 and the second heat-conducting component 600. The presence of a heat insulation layer 700 between the battery assembly 200 and the second heat-conducting component 600 prevents heat carried by the second heat-conducting component 600 from being transferred to the battery assembly 200. The presence of a heat insulation layer 700 between the battery assembly 200 and the first heat-conducting component 500 prevents the cooling temperature conducted by the first heat-conducting component 500 from radiating toward the battery assembly 200, thereby reducing the cooling capacity of the first heat-conducting component 500 to the wireless charging component 300. Furthermore, with the presence of a heat insulation layer 700 between the battery assembly 200 and the second heat-conducting component 600, the cooling power of the electronic cooling chip 400 can be further reduced, thereby reducing the energy consumption of active cooling.

[0038] In this embodiment of the disclosure, in order to ensure the heat dissipation capacity of the housing 100, the housing 100 may be made of metal, preferably aluminum alloy which has excellent thermal conductivity and lightweight characteristics while ensuring structural stability.

[0039] Furthermore, such as Figure 4 As shown, one or more surfaces of the outer surface of the housing 100 are provided with an infrared radiation heat dissipation coating 104. This infrared radiation heat dissipation coating 104 is an existing material coating that enhances heat dissipation performance by increasing the infrared emissivity of the object's surface. It utilizes the principle of infrared radiation to enhance heat dissipation by increasing the infrared emissivity of the object's surface. Infrared radiation is electromagnetic radiation generated by the vibration and rotation of molecules and atoms within a substance, accompanied by electron transitions. Any object with a temperature above absolute zero will continuously emit infrared radiation, increasing the radiative heat dissipation of the housing 100. With the infrared radiation heat dissipation coating 104 on the outside of the housing 100, it enhances the object's infrared radiation capability, improving heat dissipation efficiency and thus reducing the object's temperature. This achieves a dual heat dissipation mechanism, ensuring and improving its heat dissipation performance.

[0040] In the embodiments of this disclosure, such as Figure 6As shown, the wireless charging assembly 300 includes a magnetic shielding sheet 301 disposed close to the first heat-conducting assembly 500, and a wireless charging coil 302 disposed on the side of the magnetic shielding sheet 301 away from the battery assembly 200. The wireless charging coil 302 is the core component of the wireless charging process. Its function is to convert electrical energy into electromagnetic field energy through electromagnetic induction or magnetic resonance principles, under the control and drive of the control circuit. This allows it to wirelessly transmit power to the receiving coil of the device being charged to provide charging. The magnetic shielding sheet 301 serves to block and guide magnetic fields, preventing changing magnetic fields from causing eddy current effects in other metal components, which could affect the operation of the battery assembly 200. It also avoids heat generation and energy loss, prevents potential damage to electronic products, and confines the magnetic field, ensuring that the field energy is utilized by the device being charged as much as possible.

[0041] In some embodiments, a magnetic ring 303 is also arranged around the outside of the wireless charging coil 302. The magnetic ring 303 can attract iron blocks or magnetic blocks placed on the item being charged, and can be used to fix and position the item being charged. By arranging the magnetic ring 303 around the wireless charging coil 302, it can play an automatic alignment role during application, thereby achieving a better application effect.

[0042] In the embodiments of this disclosure, such as Figure 1 As shown, to ensure the compactness of the power bank structure, the battery assembly 200 is positioned within the mounting chamber 101 with its thickness direction aligned with that of the housing 100. The wireless charging assembly 300 is positioned on one side of the battery assembly 200 with its thickness direction aligned with that of the housing 100. The mounting chamber 101 has a mounting area 105 located on one side surrounding the thickness direction of the battery assembly 200, and the electronic cooling chip 400 is positioned within the mounting area 105. The housing 100 can be circular or square in structure, and since the housing 100 is typically a thin-walled structure, the internal mounting chamber 101 is also approximately circular or square in orientation to accommodate this.

[0043] In this embodiment of the disclosure, both the housing 100 and the battery assembly 200 are preferably rectangular (square), and the mounting chamber 101 is also rectangular in shape to match the housing 100. The battery assembly 200 is attached to one end of the housing 100 in the length direction, and the length or width of the battery assembly 200 is also adapted to the width of the mounting chamber 101. The mounting area 105 is located at one end of the housing 100 away from the direction of the battery assembly 200.

[0044] Furthermore, such as Figure 3As shown, both the first heat-conducting component 500 and the second heat-conducting component 600 are L-shaped. One end of the L-shaped structure of the first heat-conducting component 500 is disposed between the battery component 200 and the wireless charging component 300, and the other end extends into the mounting area 105 parallel to the thickness direction of the battery component 200. One end of the L-shaped structure of the second heat-conducting component 600 is disposed between the battery component 200 and the inner wall of the mounting chamber 101, and the other end extends into the mounting area 105. The ends of the second heat-conducting component 600 and the first heat-conducting component 500 located in the mounting area 105 are parallel to each other and face each other. The electronic cooling chip 400 is disposed between the first heat-conducting component 500 and the second heat-conducting component 600 in the mounting area 105. Thus, the thickness of the first heat-conducting component 500 and the second heat-conducting component 600 can both be set to about 1 mm, or even less than 1 mm. At the same time, the electronic cooling chip 400 can be set in the mounting chamber 101 in a form where the thickness direction is perpendicular to the length direction of the housing 100 and parallel to the end face of the battery assembly 200. This makes the size impact of this structure smaller compared to traditional unoptimized ultra-thin and lightweight power banks.

[0045] In some embodiments, the first thermally conductive component 500 can be bonded to the wireless charging component 300 and the electronic cooling chip 400 using thermally conductive silicone to achieve thermally conductive contact. The second thermally conductive component 600 can also be bonded to the housing 100 and the electronic cooling chip 400 using thermally conductive silicone to achieve thermally conductive contact. Other adjacent components can be bonded using ordinary double-sided adhesive to achieve a relatively stable fixed relationship.

[0046] The first thermally conductive component 500 and / or the second thermally conductive component 600 can be made of metal or graphene. That is, the first thermally conductive component 500 and the second thermally conductive component 600 can be selected from one or both of which are made of metal or graphene.

[0047] In this disclosure, the preferred implementation is as follows: Figure 5 As shown, both the first heat-conducting component 500 and the second heat-conducting component 600 are provided with a metal heat-conducting layer 501 (metal material) and a graphene heat-conducting layer 502 (graphene material) that are bonded together. The high-performance thermal conductivity of graphene is used as the primary heat conductor, while the metal heat-conducting layer 501 assists in heat conduction and heat equalization. The main function of the metal heat-conducting layer 501 is to equalize heat, achieving efficient and uniform heat conduction in both the first heat-conducting component 500 and the second heat-conducting component 600.

[0048] In some embodiments, considering that the first thermal conductive component 500 and the second thermal conductive component 600 are conductive, the battery assembly 200 can be entirely covered with an insulating film.

[0049] In the embodiments of this disclosure, such as Figure 3As shown, during the specific installation of the first heat-conducting component 500 and the second heat-conducting component 600, the first heat-conducting component 500 makes thermal contact with both the wireless charging component 300 and the cooling surface of the electronic cooling chip 400 through the metal heat-conducting layer 501; the second heat-conducting component 600 makes thermal contact with both the inner wall of the mounting chamber 101 and the heating surface of the electronic cooling chip 400 through the metal heat-conducting layer 501. The widths of the first heat-conducting component 500 and the second heat-conducting component 600 can be set to be adapted to the width of the mounting chamber 101 to expand the heat-conducting area and ensure enhanced heat conduction. The metal heat-conducting layer 501 is preferably made of aluminum alloy, which balances thermal conductivity and lightweight. The metal heat-conducting layer 501 and the graphene heat-conducting layer 502 are tightly bonded. Under the premise that the metal heat-conducting layer 501 and the graphene heat-conducting layer 502 cooperate with each other, while ensuring thermal conductivity, the metal heat-conducting layer 501 is preferably 0.45 mm thick, and the graphene heat-conducting layer 502 is preferably 0.2 mm thick.

[0050] The PCB board 800, used to control the power supply, wireless charging component 300, and electronic cooling chip 400 to work together, can be located at one end of the mounting chamber 101 away from the wireless charging component 300. The housing 100 may include a box body 102 and a cover 103. A cavity is provided on the box body 102, and the cover 103 is provided on the box body 102 to close the cavity and form the mounting chamber 101.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel wireless charging bank structure, characterized in that, include: A housing, wherein an installation chamber is provided inside the housing; A battery assembly disposed within the mounting chamber; A wireless charging component is disposed in the mounting chamber, located on one side of the battery assembly; An electronic cooling chip is disposed in the mounting chamber, and the electronic cooling chip has a cooling surface and a heating surface; A first thermal conductive component is disposed between the battery component and the wireless charging component. The first thermal conductive component is in thermal contact with the wireless charging component and extends to the electronic cooling chip, where it is in thermal contact with the cooling surface of the electronic cooling chip. The second heat-conducting component is in thermal contact with the heating surface of the electronic cooling chip and simultaneously in thermal contact with the inner wall of the mounting chamber. The battery assembly is disposed within the mounting cavity in the same thickness direction as the housing; the wireless charging assembly is disposed on one side in the thickness direction of the battery assembly; the mounting cavity has a mounting area located on one side surrounding the thickness direction of the battery assembly, and the electronic cooling chip is disposed in the mounting area; Both the housing and the battery assembly are rectangular, with the battery assembly abutting one end of the housing along its length, and the mounting area located inside the housing at the end away from the battery assembly. Both the first and second thermal conductive components are L-shaped. One end of the first thermal conductive component is disposed between the battery assembly and the wireless charging assembly, and the other end extends into the mounting area parallel to the thickness direction of the battery assembly. One end of the second thermal conductive component is disposed between the battery assembly and the inner wall of the mounting chamber, and the other end extends into the mounting area. The ends of the second and first thermal conductive components located within the mounting area are parallel to each other and face each other. The electronic cooling chip is disposed between the first and second thermal conductive components within the mounting area. Active cooling via an electronic cooling pad effectively cools the wireless charging component located adjacent to the battery pack, preventing heat buildup caused by the wireless charging component's operation from accumulating during power bank use.

2. The novel wireless charging bank structure according to claim 1, characterized in that, Both the first thermal conductive component and the second thermal conductive component are provided with a metal thermal conductive layer and a graphene thermal conductive layer that are bonded to each other.

3. The novel wireless charging bank structure according to claim 2, characterized in that, The first thermally conductive component is in thermal contact with both the wireless charging component and the cooling surface of the electronic cooling chip through the metal thermally conductive layer. The second heat-conducting component is in thermal contact with both the inner wall of the mounting chamber and the heating surface of the electronic cooling chip through the metal heat-conducting layer.

4. The novel wireless charging bank structure according to claim 1, characterized in that, The first thermal conductive component and / or the second thermal conductive component are made of metal or graphene.

5. The novel wireless charging bank structure according to claim 1, characterized in that, A heat insulation layer is provided between the battery assembly and the first heat-conducting component and / or the second heat-conducting component.

6. The novel wireless charging bank structure according to claim 1, characterized in that, The housing is made of metal, and one or more sides of the outer surface of the housing are provided with an infrared radiation heat dissipation coating.

7. The novel wireless charging bank structure according to claim 1, characterized in that, The wireless charging component includes a magnetic shielding sheet disposed close to the first heat-conducting component, and a wireless charging coil is disposed on the side of the magnetic shielding sheet away from the battery component.

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