Ultrathin magnetic attraction power bank
Patent Information
- Application Number
- CN202521948576.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-09-10
AI Technical Summary
通过采用上述技术方案，通过设置外壳组件、磁吸组件、充电电路组件及散热组件的协同结构，有效解决传统充电宝轻薄性、充电稳定性与散热性难以兼顾的问题：外壳组件的上盖与下盖通过卡扣结构固定形成封闭腔室，省去传统螺丝连接的空间冗余，同时实现内部组件的防护；磁吸组件的环形磁铁阵列嵌入上盖内侧壁面，避免磁吸组件与其他部件堆叠导致的厚度增加，提升整体轻薄性；充电电路组件的无线充电线圈固定于PCB板上方且PCB板固定于下盖内侧壁面，实现充电组件的紧凑集成，进一步压缩内部空间；散热组件的石墨烯散热片紧密贴附于PCB板背面，可快速导出充电过程中产生的热量，避免热量堆积影响充电效率，最终实现充电宝轻薄便携、稳定无线充电与高效散热的综合效果
该一种超薄磁吸充电宝，通过外壳组件的上盖、下盖，磁吸组件的环形磁铁阵列，充电电路组件的无线充电线圈、PCB板，各组件按“上盖-磁吸组件”“下盖-充电电路组件-散热组件” 的分层方式紧凑集成，减少组件间冗余间隙，轻质材质进一步降低整体重量，解决背景技术中“传统无线充电宝体积大、厚度难缩减，磁吸式充电宝厚度重量仍较高”的问题，大幅降低充电宝整体厚度与重量，提升便携性，满足用户随身携带、随时补电的场景需求；通过散热组件的石墨烯散热片，充电时充电电路组件的无线充电线圈、PCB板产生热量，热量通过PCB板快速传递至石墨烯散热片，石墨烯凭借高导热性将热量快速导出至外壳组件或空气中，解决背景技术中“现有充电宝散热不畅导致热量堆积、充电效率下降、设备寿命受影响及安全隐患”的问题，避免热量滞留，保障充电过程稳定，同时延长充电宝与被充电设备的使用寿命，消除安全风险；通过充电电路组件的快充协议芯片，充电初期，快充协议芯片与被充电设备自动建立协议通信，识别设备的快充需求后，调节无线充电线圈的输出参数，使充电过程匹配设备的快速充电标准，解决背景技术中 “现有无线充电宝充电效率低、难以匹配电子设备快速充电需求” 的问题，显著提升充电速度，为用户提供高效补电体验。
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Figure CN224697431U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of portable electronic device charging technology, and in particular to an ultra-thin magnetic power bank. Background Technology
[0002] With the widespread use of portable electronic devices such as smartphones and tablets, users' demand for portable charging devices is becoming increasingly urgent. Currently, portable charging devices on the market are mainly divided into two categories: wired and wireless charging. Among them, wireless charging technology, with its convenience of eliminating the need for plugging and unplugging cables, is gradually becoming the mainstream application.
[0003] However, existing wireless power banks still suffer from several technical shortcomings: traditional wireless power banks are generally bulky due to the need to accommodate charging components and batteries, especially in terms of thickness, which is difficult to reduce, resulting in poor portability and failing to meet users' needs for on-the-go charging; some wireless power banks using magnetic designs, while improving device positioning stability during charging through magnetic structures, are still relatively thick and heavy due to the stacking design of the magnetic and charging components, failing to solve the problem of achieving a thinner and lighter design; at the same time, both traditional wireless power banks and existing magnetic power banks are prone to poor heat dissipation during charging due to heat generated by the charging circuit components. Heat accumulation not only reduces charging efficiency but may also affect the lifespan of both the charging and charged devices, and even pose safety hazards. In addition, the charging efficiency of existing wireless power banks is generally low, making it difficult to match the fast charging needs of current electronic devices and failing to provide users with an efficient charging experience. Therefore, an ultra-thin magnetic power bank is proposed. Utility Model Content
[0004] The purpose of this application is to provide an ultra-thin magnetic power bank that has the advantages of being lightweight and portable, having stable magnetic positioning, efficient heat dissipation, and high charging efficiency.
[0005] This application provides an ultra-thin magnetic power bank with the following technical solution: It includes a shell assembly, a magnetic assembly, a charging circuit assembly, and a heat dissipation assembly. The shell assembly includes an upper cover and a lower cover, which are fixedly connected by a snap-fit structure to form a closed chamber for accommodating the magnetic assembly, the charging circuit assembly, and the heat dissipation assembly. The magnetic assembly includes a ring-shaped magnet array embedded in the inner wall of the upper cover. The charging circuit assembly includes a wireless charging coil and a PCB board, with the wireless charging coil fixedly disposed above the PCB board, and the PCB board fixedly mounted on the inner wall of the lower cover. The heat dissipation assembly includes a graphene heat sink tightly attached to the back of the PCB board. By adopting the above technical solution and setting up a collaborative structure of the outer shell assembly, magnetic assembly, charging circuit assembly, and heat dissipation assembly, the problem of traditional power banks being unable to simultaneously achieve thinness, charging stability, and heat dissipation is effectively solved: the upper and lower covers of the outer shell assembly are fixed together by a snap-fit structure to form a closed chamber, eliminating the space redundancy of traditional screw connections and protecting the internal components; the ring magnet array of the magnetic assembly is embedded in the inner wall of the upper cover, avoiding the increase in thickness caused by stacking the magnetic assembly with other components, thus improving the overall thinness; the wireless charging coil of the charging circuit assembly is fixed on the top of the PCB board, and the PCB board is fixed to the inner wall of the lower cover, achieving compact integration of the charging components and further compressing the internal space; the graphene heat sink of the heat dissipation assembly is tightly attached to the back of the PCB board, which can quickly dissipate the heat generated during charging and avoid heat accumulation affecting charging efficiency, ultimately achieving a comprehensive effect of thin and portable power bank, stable wireless charging, and efficient heat dissipation.
[0006] Preferably, an anti-slip silicone pad is also provided at the edge of the outer casing assembly, and the anti-slip silicone pad is fixed to the outside of the connection between the upper cover and the lower cover by an adhesive method.
[0007] By adopting the above technical solution, and by setting anti-slip silicone pads on the edges of the outer casing components, and by bonding the anti-slip silicone pads to the outside of the connection between the upper and lower covers, the high friction properties of silicone material effectively improve the stability of the power bank when the user holds it, preventing the power bank from slipping from the hand during charging. At the same time, the anti-slip silicone pads can also increase the friction between the power bank and the contact surface when the power bank is placed on a flat surface, preventing the power bank from shifting due to slight collisions, ensuring the continuity of the charging process, and optimizing the user experience.
[0008] Preferably, the charging circuit assembly further includes a fast charging protocol chip, which is integrated on the PCB board and electrically connected to the wireless charging coil.
[0009] By adopting the above technical solution, and by adding a fast charging protocol chip to the charging circuit assembly, and integrating the fast charging protocol chip on the PCB board and electrically connecting it to the wireless charging coil, the power bank can establish protocol communication with the device being charged that supports fast charging. It can adjust the output parameters of the wireless charging coil according to the device's needs to achieve fast charging. Compared with traditional wireless power banks without fast charging function, it significantly shortens the charging time, meets users' needs for rapid power replenishment, and improves charging efficiency.
[0010] Preferably, the annular magnet array is composed of multiple sector magnet units, which are arranged in a ring at equal intervals along the inner wall of the upper cover.
[0011] By adopting the above technical solution, the annular magnet array is configured to consist of multiple sector magnet units, which are arranged in a ring at equal intervals along the inner wall of the top cover. This allows the magnetic force generated by the annular magnet array to be evenly distributed on the inner side of the top cover. When the device being charged approaches, a stable and balanced attraction force can be formed, preventing the device from shifting due to uneven magnetic force distribution. At the same time, the uniform magnetic force can also reduce the situation of excessive local force on the device being charged, protect the appearance of the device, further ensure the alignment of the device with the wireless charging coil during the charging process, and improve charging stability.
[0012] Preferably, both the upper cover and the lower cover are made of a lightweight rigid material, which is either lightweight plastic or aluminum alloy.
[0013] By adopting the above technical solution, and by making the top and bottom covers with lightweight and rigid materials, the lightweight characteristics can significantly reduce the overall weight of the power bank, reduce the burden on users when carrying it, and improve portability; the rigid material can ensure the structural strength of the shell components, effectively resist minor collisions and squeezing in daily use, and prevent the shell from deforming and damaging the internal magnetic components, charging circuit components and heat dissipation components, thus balancing the power bank's thinness and durability.
[0014] Preferably, the wireless charging coil and the annular magnet array are coaxially arranged, and the outer diameter of the wireless charging coil is not greater than the inner diameter of the annular magnet array.
[0015] By adopting the above technical solution, and by setting the wireless charging coil and the ring magnet array to be coaxial, and ensuring that the outer diameter of the wireless charging coil is no larger than the inner diameter of the ring magnet array, it is ensured that when the ring magnet array attracts the device being charged, the charging area of the device being charged can accurately correspond to the position of the wireless charging coil, thus avoiding charging interruption or efficiency reduction caused by misalignment between the coil and the device's charging area. At the same time, this structural design can also reduce energy loss during the wireless charging process, further ensuring charging efficiency and stability.
[0016] Preferably, the area of the graphene heat sink is not less than the area of the back side of the PCB board, and the edge of the graphene heat sink is flush with the edge of the PCB board.
[0017] By adopting the above technical solution, and by setting the area of the graphene heat sink to be no less than the area of the back of the PCB board and the edges flush with the edges of the PCB board, the graphene heat sink can fully cover the heat-generating area on the back of the PCB board, avoiding local heat accumulation due to insufficient heat dissipation area. The high thermal conductivity of graphene material, combined with the comprehensive coverage, can quickly dissipate the heat generated by components such as the PCB board and wireless charging coil, preventing heat from affecting the working efficiency of the charging circuit components, while extending the service life of internal components and reducing safety hazards caused by high temperature.
[0018] Preferably, the magnetic attraction component further includes a positioning protrusion, which is disposed on the inner side of the annular magnet array and integrally formed with the upper cover, for assisting the device being charged to align with the wireless charging coil.
[0019] By adopting the above technical solution, a positioning protrusion is added to the magnetic component. This protrusion is located inside the annular magnet array and integrally formed with the top cover. When the device being charged approaches the top cover, the positioning protrusion can fit into the corresponding structure of the device, helping the device quickly find the alignment position with the wireless charging coil and reducing the need for users to repeatedly adjust the device position. At the same time, the positioning protrusion can further restrict the movement of the device during charging. Combined with the attraction force of the annular magnet array, this provides double protection for the accurate alignment of the device and the wireless charging coil, improving the convenience of charging operation and the stability of the charging process.
[0020] In summary, this application includes at least one of the following beneficial technical effects: This ultra-thin magnetic power bank features a compact integration of components: an upper and lower cover shell assembly, a ring-shaped magnet array in the magnetic assembly, and a wireless charging coil and PCB board in the charging circuit assembly. These components are arranged in a layered manner: "upper cover - magnetic assembly," "lower cover - charging circuit assembly - heat dissipation assembly." This reduces redundant gaps between components, and the lightweight materials further reduce the overall weight. This addresses the problems of traditional wireless power banks being large and difficult to reduce in thickness, and magnetic power banks still being relatively thick and heavy. It significantly reduces the overall thickness and weight of the power bank, improving portability and meeting users' needs for on-the-go charging. The graphene heat sink in the heat dissipation assembly quickly transfers heat generated by the wireless charging coil and PCB board during charging to the graphene heat sink. The graphene, with its high thermal conductivity, rapidly conducts the heat to the shell assembly or the air, solving the problem of heat loss in the back. This technology addresses the problem of "existing power banks' poor heat dissipation leading to heat buildup, reduced charging efficiency, reduced device lifespan, and safety hazards." It avoids heat retention, ensures a stable charging process, extends the lifespan of both the power bank and the device being charged, and eliminates safety risks. Through a fast-charging protocol chip in the charging circuit components, the chip automatically establishes protocol communication with the device at the beginning of charging. After identifying the device's fast-charging needs, it adjusts the output parameters of the wireless charging coil to match the device's fast-charging standard. This solves the problem of "existing wireless power banks having low charging efficiency and difficulty in matching the fast-charging needs of electronic devices" in the background technology, significantly improving charging speed and providing users with an efficient charging experience. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of the present application. Figure 2This is a schematic diagram of the structure in frontal three-dimensional cross-section of this application; Figure 3 This is a schematic diagram of the structure of the upper part of the lower cover of this application; Figure 4 This is a partial cross-sectional structural schematic diagram of the charging circuit assembly of this application; Figure 5 for Figure 1 A schematic diagram of the structure at point A in the middle.
[0022] In the picture: 1. Shell assembly; 11. Top cover; 12. Bottom cover; 2. Magnetic assembly; 21. Ring magnet array; 211. Fan-shaped magnet unit; 3. Charging circuit assembly; 31. Wireless charging coil; 32. PCB board; 33. Fast charging protocol chip; 4. Heat dissipation assembly; 41. Graphene heat sink; 5. Anti-slip silicone pad; 6. Positioning protrusion. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.
[0024] Example 1: An ultra-thin magnetic power bank, as shown in the following figure. Figure 1 , Figure 2 and Figure 3The device includes a housing assembly 1, a magnetic attraction assembly 2, a charging circuit assembly 3, and a heat dissipation assembly 4. The housing assembly 1 includes an upper cover 11 and a lower cover 12, which are fixedly connected by a snap-fit structure to form a closed chamber for accommodating the magnetic attraction assembly 2, the charging circuit assembly 3, and the heat dissipation assembly 4. The magnetic attraction assembly 2 includes a ring magnet array 21, which is embedded in the inner wall of the upper cover 11. The charging circuit assembly 3 includes a wireless charging coil 31 and a PCB board 32, with the wireless charging coil 31 fixedly disposed above the PCB board 32 and the PCB board 32 fixedly mounted on the inner wall of the lower cover 12. The heat dissipation assembly 4 includes a graphene heat sink 41, which is tightly attached to the back of the PCB board 32. By setting up a synergistic structure of the housing assembly 1, the magnetic attraction assembly 2, the charging circuit assembly 3, and the heat dissipation assembly 4, the device effectively solves the problems of traditional power banks. The challenge of balancing thinness, charging stability, and heat dissipation is addressed by: The upper cover 11 and lower cover 12 of the outer casing assembly 1 are fixed together by a snap-fit structure to form a closed chamber, eliminating the space redundancy of traditional screw connections and protecting internal components; the annular magnet array 21 of the magnetic component 2 is embedded in the inner wall of the upper cover 11, avoiding the increase in thickness caused by stacking the magnetic component 2 with other components, thus improving overall thinness; the wireless charging coil 31 of the charging circuit assembly 3 is fixed above the PCB board 32, and the PCB board 32 is fixed to the inner wall of the lower cover 12, achieving compact integration of the charging components and further reducing internal space; the graphene heat sink 41 of the heat dissipation assembly 4 is tightly attached to the back of the PCB board 32, which can quickly dissipate the heat generated during charging, preventing heat accumulation from affecting charging efficiency, ultimately achieving a comprehensive effect of a thin and portable power bank, stable wireless charging, and efficient heat dissipation.
[0025] Reference Figure 1 , Figure 2 and Figure 5The outer casing assembly 1 also features an anti-slip silicone pad 5 along its edge. This pad is adhesively fixed to the outer side of the connection between the upper cover 11 and the lower cover 12. The charging circuit assembly 3 also includes a fast charging protocol chip 33, integrated onto the PCB board 32 and electrically connected to the wireless charging coil 31. By using the anti-slip silicone pad 5 along the edge of the outer casing assembly 1, and adhesively fixing it to the outer side of the connection between the upper cover 11 and the lower cover 12, the high friction properties of silicone effectively improve the stability of the user's grip on the power bank, preventing it from slipping from their hand during charging. Simultaneously, the anti-slip silicone pad... 5. It can also increase the friction between the power bank and the contact surface when the power bank is placed on a flat surface, preventing the power bank from shifting due to slight collisions, ensuring the continuity of the charging process, and optimizing the user experience. By adding a fast charging protocol chip 33 to the charging circuit component 3, and the fast charging protocol chip 33 is integrated on the PCB board 32 and electrically connected to the wireless charging coil 31, the power bank can establish protocol communication with the device being charged that supports fast charging. It can adjust the output parameters of the wireless charging coil 31 according to the device's needs to achieve fast charging. Compared with traditional wireless power banks without fast charging function, it significantly shortens the charging time, meets the user's need for rapid power replenishment, and improves charging efficiency.
[0026] Reference Figure 1 , Figure 2 and Figure 3 The annular magnet array 21 is composed of multiple sector-shaped magnet units 211, which are arranged in a ring at equal intervals along the inner wall of the upper cover 11. Both the upper cover 11 and the lower cover 12 are made of lightweight, rigid materials, such as lightweight plastic or aluminum alloy. By setting the annular magnet array 21 to consist of multiple sector-shaped magnet units 211, and arranging them in a ring at equal intervals along the inner wall of the upper cover 11, the magnetic force generated by the annular magnet array 21 is evenly distributed on the inner side of the upper cover 11. When the device being charged approaches, a stable and balanced attraction force can be formed, avoiding the device being attracted due to uneven magnetic force distribution. The uniform magnetic force also reduces the excessive local stress on the charged device, protecting the device's appearance and further ensuring the alignment of the device with the wireless charging coil 31 during charging, thus improving charging stability. By using lightweight and rigid materials for the upper cover 11 and lower cover 12, the lightweight nature can significantly reduce the overall weight of the power bank, reducing the burden on users and improving portability. The rigid material can ensure the structural strength of the outer shell component 1, effectively resisting minor collisions and pressures during daily use, and preventing the outer shell from deforming and damaging the internal magnetic component 2, charging circuit component 3, and heat dissipation component 4, thus balancing the power bank's thinness and durability.
[0027] Reference Figure 1 , Figure 2 and Figure 4The wireless charging coil 31 and the annular magnet array 21 are coaxially arranged, and the outer diameter of the wireless charging coil 31 is not greater than the inner diameter of the annular magnet array 21. The area of the graphene heat sink 41 is not less than the area of the back of the PCB board 32, and the edge of the graphene heat sink 41 is flush with the edge of the PCB board 32. The magnetic attraction component 2 also includes a positioning protrusion 6, which is located on the inner side of the annular magnet array 21 and integrally formed with the upper cover 11. It is used to assist the device being charged in aligning with the wireless charging coil 31. By setting the wireless charging coil 31 and the annular magnet array 21 to be coaxially arranged, and the outer diameter of the wireless charging coil 31 is not greater than the inner diameter of the annular magnet array 21, it is ensured that when the annular magnet array 21 attracts the device being charged, the charging area of the device being charged can accurately correspond to the position of the wireless charging coil 31, avoiding charging interruption or efficiency reduction caused by misalignment between the coil and the device charging area. At the same time, this structure can also reduce energy loss during wireless charging, further ensuring charging efficiency and stability. The edges of the graphene heat sink 41 are flush with the edges of the PCB board 32, allowing the graphene heat sink 41 to fully cover the heat-generating area on the back of the PCB board 32, avoiding localized heat accumulation due to insufficient heat dissipation area. The high thermal conductivity of graphene material, combined with the comprehensive coverage, can quickly dissipate the heat generated by components such as the PCB board 32 and the wireless charging coil 31, preventing heat from affecting the working efficiency of the charging circuit assembly 3, while extending the service life of internal components and reducing safety hazards caused by high temperatures. By adding a positioning protrusion 6 to the magnetic component 2, and the positioning protrusion 6 being set inside the annular magnet array 21 and integrally formed with the top cover 11, when the device being charged approaches the top cover 11, the positioning protrusion 6 can fit with the corresponding structure of the device being charged, helping the device to quickly find the alignment position with the wireless charging coil 31, reducing the user's repeated operation of adjusting the device position. At the same time, the positioning protrusion 6 can also further restrict the movement of the device during the charging process. Combined with the adsorption force of the annular magnet array 21, it doubles the protection of the precise alignment between the device and the wireless charging coil 31, improving the convenience of charging operation and the stability of the charging process.
[0028] In this embodiment, the upper cover 11 and lower cover 12 of the outer shell assembly 1, the annular magnet array 21 of the magnetic attraction assembly 2, and the wireless charging coil 31 and PCB board 32 of the charging circuit assembly 3 are compactly integrated in a layered manner of "upper cover 11 - magnetic attraction assembly 2" and "lower cover 12 - charging circuit assembly 3 - heat dissipation assembly 4". This reduces redundant gaps between components, and the lightweight materials further reduce the overall weight, solving the problem in the background technology that "traditional wireless power banks are large in size and difficult to reduce thickness, and magnetic power banks are still relatively thick and heavy". This significantly reduces the overall thickness and weight of the power bank, improves portability, and meets the needs of users to carry it with them and recharge it at any time. Through the graphene heat sink 41 of the heat dissipation assembly 4, heat is generated by the wireless charging coil 31 and PCB board 32 of the charging circuit assembly 3 during charging. The heat is quickly transferred to the graphene heat sink 41 through the PCB board 32, and the graphene, with its high thermal conductivity, quickly conducts the heat to the outer shell assembly 1 or the air. This invention addresses the problems of "poor heat dissipation in existing power banks leading to heat buildup, reduced charging efficiency, reduced device lifespan, and safety hazards." It avoids heat retention, ensures stable charging, extends the lifespan of both the power bank and the device being charged, and eliminates safety risks. Through the fast charging protocol chip 33 in the charging circuit component 3, the chip automatically establishes protocol communication with the device being charged during the initial charging phase. After identifying the device's fast charging needs, it adjusts the output parameters of the wireless charging coil 31 to match the device's fast charging standard. This solves the problem of "low charging efficiency and difficulty in matching the fast charging needs of electronic devices" in existing wireless power banks, significantly improving charging speed and providing users with an efficient charging experience.
[0029] The implementation principle of this application embodiment is as follows: The annular magnet array 21 of the magnetic attraction component 2 generates an attraction force, which helps the device quickly find its position. Since the annular magnet array 21 consists of multiple fan-shaped magnet units 211 arranged in an evenly spaced ring along the inner wall of the upper cover 11, the uniformly distributed magnetic force can stably attract the device to be charged to the surface of the upper cover 11, preventing the device from shifting; the coaxial arrangement of the wireless charging coil 31 and the annular magnet array 21 in the charging circuit component 3 ensures that the charging area of the device being charged is precisely aligned with the wireless charging coil 31, laying the foundation for subsequent efficient charging; the external power supply supplies power to the PCB board 32, and the PC... Board B 32 transmits electrical energy to the wireless charging coil 31 fixed above it. When energized, the wireless charging coil 31 generates an alternating magnetic field, which, based on the principle of electromagnetic induction, forms an electromagnetic coupling with the induction coil inside the device being charged, wirelessly transmitting electrical energy to the device and achieving wireless charging. If the device being charged supports fast charging, the fast charging protocol chip 33 in the charging circuit assembly 3 will automatically establish protocol communication with the device, identify the device's fast charging requirements, and adjust the output parameters of the wireless charging coil 31 to match the device's fast charging standard, improving charging efficiency. During charging, the charging circuit assembly 3... The wireless charging coil 31, PCB board 32, and fast charging protocol chip 33 generate heat. The heat dissipation component 4 and the outer shell component 1 work together to dissipate heat. The heat is first transferred to the graphene heat sink 41 tightly attached to the back of the PCB board 32 through conduction. Since the area of the graphene heat sink 41 is not less than the area of the back of the PCB board 32 and its edge is flush with the edge of the PCB board 32, it can fully cover the heat-generating area and quickly absorb and conduct heat. Part of the absorbed heat is directly dissipated to the inside of the lower cover 12 of the outer shell component 1 through the graphene heat sink 41, and then conducted to the outside through the material properties of the lower cover 12. In the air, another part is directly radiated and dissipated through the graphene heat sink 41, avoiding heat accumulation in the closed chamber and ensuring charging efficiency and component lifespan; the upper cover 11 and lower cover 12 of the outer shell component 1 are fixedly connected by a snap-fit structure to form a closed chamber, which protects the internal magnetic component 2, charging circuit component 3 and heat dissipation component 4 from dust and collision, and avoids interference from the external environment to the internal components; when the anti-slip silicone pad 5 on the edge of the outer shell component 1 comes into contact with the user's hand or the flat surface, the high friction properties of the silicone material prevent the power bank from slipping during charging and ensure the stability of the charging process.
Claims
1. An ultra-thin magnetic power bank, comprising a shell assembly (1), a magnetic assembly (2), a charging circuit assembly (3), and a heat dissipation assembly (4), characterized in that: The outer casing assembly (1) includes an upper cover (11) and a lower cover (12). The upper cover (11) and the lower cover (12) are fixedly connected by a snap-fit structure to form a closed chamber for accommodating the magnetic suction assembly (2), the charging circuit assembly (3), and the heat dissipation assembly (4). The magnetic suction assembly (2) includes a ring magnet array (21), which is embedded in the inner wall of the upper cover (11). The charging circuit assembly (3) includes a wireless charging coil (31) and a PCB board (32). The wireless charging coil (31) is fixedly disposed above the PCB board (32), and the PCB board (32) is fixedly installed on the inner wall of the lower cover (12). The heat dissipation assembly (4) includes a graphene heat sink (41), which is tightly attached to the back of the PCB board (32).
2. The ultra-thin magnetic power bank according to claim 1, characterized in that: An anti-slip silicone pad (5) is also provided at the edge of the outer shell assembly (1). The anti-slip silicone pad (5) is fixed to the outside of the connection between the upper cover (11) and the lower cover (12) by adhesive bonding.
3. The ultra-thin magnetic power bank according to claim 1, characterized in that: The charging circuit assembly (3) also includes a fast charging protocol chip (33), which is integrated on the PCB board (32) and electrically connected to the wireless charging coil (31).
4. The ultra-thin magnetic power bank according to claim 1, characterized in that: The annular magnet array (21) is composed of multiple fan-shaped magnet units (211), which are arranged in an equally spaced ring along the inner wall of the upper cover (11).
5. The ultra-thin magnetic power bank according to claim 1, characterized in that: Both the upper cover (11) and the lower cover (12) are made of lightweight rigid material, which is lightweight plastic or aluminum alloy.
6. The ultra-thin magnetic power bank according to claim 1, characterized in that: The wireless charging coil (31) is coaxially arranged with the annular magnet array (21), and the outer diameter of the wireless charging coil (31) is not greater than the inner diameter of the annular magnet array (21).
7. The ultra-thin magnetic power bank according to claim 1, characterized in that: The area of the graphene heat sink (41) is not less than the area of the back side of the PCB board (32), and the edge of the graphene heat sink (41) is flush with the edge of the PCB board (32).
8. The ultra-thin magnetic power bank according to claim 1, characterized in that: The magnetic suction component (2) also includes a positioning protrusion (6), which is disposed on the inner side of the annular magnet array (21) and integrally formed with the upper cover (11) to assist the device being charged in aligning with the wireless charging coil (31).