Wireless power supply vacuum cup

Abstract

The utility model provides a wireless power supply vacuum cup, which relates to the field of wireless power supply, and is characterized in that a nanocrystalline layer, a first ferrite and an electromagnetic induction receiving coil are sequentially overlaid at the bottom of a vacuum cup body, so that the vacuum cup as a power supply object of a power supply base can effectively restrain and concentrate an alternating magnetic field generated by a transmitting coil of the power supply base; loss of magnetic energy in the transmission process is reduced, and efficient interception and conversion of the receiving coil to the magnetic field are achieved; wherein the nanocrystalline layer inhibits ineffective divergence of a magnetic field by virtue of the property of high magnetic conductivity of nanocrystalline, so that the magnetic field of the coil is more focused, and loss in an electromagnetic conversion process is reduced; and the first ferrite forms magnetic circuit shielding on the back surface of the receiving coil, so that eddy-current loss generated by the cup body of the vacuum cup is reduced, the overall coupling efficiency is improved, the loss in the electromagnetic conversion process is further reduced, and the energy use efficiency of the wireless power supply vacuum cup is improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless power supply technology, and specifically to a wireless power supply thermos cup. Background Technology

[0002] In recent years, wireless power supply technology has developed rapidly in the consumer electronics field, such as wireless power-powered thermos cups. The transmitting coil in the power supply base of a wireless power-powered thermos cup first converts electrical energy into magnetic field energy, and then the receiving coil of the thermos cup collects this magnetic energy and converts it back into electrical energy for heating. However, existing wireless power-powered thermos cups have large conversion losses in the above electromagnetic conversion process during operation, resulting in low energy utilization efficiency. Utility Model Content

[0003] The purpose of this application is to provide a wirelessly powered thermos cup, which aims to reduce the conversion loss during the electromagnetic conversion process of the wirelessly powered thermos cup during operation.

[0004] This application embodiment provides a wirelessly powered thermos cup, the wirelessly powered thermos cup comprising:

[0005] A power supply base, on which an electromagnetic induction transmitting coil is provided;

[0006] A thermos cup, comprising a thermos cup body, a nanocrystalline layer, a first ferrite, and an electromagnetic induction receiving coil, wherein the nanocrystalline layer, the first ferrite, and the electromagnetic induction receiving coil are sequentially stacked at the bottom of the thermos cup body.

[0007] The electromagnetic induction receiving coil is used to receive the alternating magnetic field emitted by the electromagnetic induction transmitting coil and to generate electrical energy using the alternating magnetic field.

[0008] In some embodiments, the thermos cup further includes a heating plate and a circuit integrated board, wherein the heating plate and the circuit integrated board are stacked sequentially between the thermos cup body and the nanocrystalline layer, and the nanocrystalline layer is attached to the bottom of the circuit integrated board;

[0009] The circuit integrated board is used to acquire the electrical energy generated by the electromagnetic induction receiving coil, and after rectifying and stabilizing the electrical energy, it is transmitted to the heating plate.

[0010] The heating plate is used to convert the received electrical energy into heat energy to heat the thermos cup.

[0011] In some embodiments, the thermos cup further includes a battery disposed between the circuit board and the heating plate;

[0012] The battery is used to receive and store electrical energy transmitted by the circuit board, and to transmit the stored electrical energy to the heating plate when the thermos is not connected to the power supply base.

[0013] In some embodiments, the heating plate is a flexible printed circuit heating plate.

[0014] In some embodiments, the thermos cup body is composed of double-layer stainless steel, with an insulation layer disposed between the double-layer stainless steel.

[0015] In some embodiments, the power supply base includes a power supply module, the electromagnetic induction transmitting coil is disposed in the power supply module, the power supply module also includes a second ferrite and a heat sink, and the electromagnetic induction transmitting coil, the second ferrite and the heat sink are stacked in sequence.

[0016] In some embodiments, the power supply base further includes a bottom shell, which is connected to the power supply module via thermally conductive silicone.

[0017] In some embodiments, the bottom shell is made of metal.

[0018] In some embodiments, the inductance of the electromagnetic induction transmitting coil is greater than or equal to 9uH and less than or equal to 11uH, and the static resistance of the electromagnetic induction transmitting coil is greater than or equal to 45mΩ and less than or equal to 55mΩ.

[0019] In some embodiments, the inductance of the electromagnetic induction receiving coil is greater than or equal to 7.38uH and less than or equal to 9.02uH, and the static resistance of the electromagnetic induction receiving coil is less than or equal to 80mΩ.

[0020] In this embodiment, a nanocrystalline layer, a first ferrite, and an electromagnetic induction receiving coil are sequentially stacked on the bottom of the thermos cup body. This allows the thermos cup, as the power supply base, to effectively constrain and concentrate the alternating magnetic field generated by the transmitting coil of the power supply base, reducing the loss of magnetic energy during transmission and enabling the receiving coil to efficiently intercept and convert the magnetic field. The nanocrystalline layer, relying on the high permeability of nanocrystals, suppresses the ineffective divergence of the magnetic field, making the coil's magnetic field more focused and reducing losses during electromagnetic conversion. The first ferrite forms a magnetic circuit shield on the back of the receiving coil, thereby reducing eddy current losses generated by the thermos cup body, improving overall coupling efficiency, further reducing losses during electromagnetic conversion, and improving the energy utilization efficiency of the wirelessly powered thermos cup. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the wirelessly powered thermos cup provided in the embodiments of this application;

[0022] Figure 2 This is another structural schematic diagram of the wirelessly powered thermos cup provided in the embodiments of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0024] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0025] The wirelessly powered thermos cup provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0026] Please see Figure 1 This is a schematic diagram of the structure of the wirelessly powered thermos provided in an embodiment of this application. Figure 1 As shown, the first aspect of this application provides a wirelessly powered thermos cup, which includes:

[0027] Power supply base 10, on which an electromagnetic induction transmitting coil (not shown in the figure) is provided;

[0028] The thermos cup 20 includes a thermos cup body 21, a nanocrystalline layer 22, a first ferrite 23, and an electromagnetic induction receiving coil 24. The nanocrystalline layer 22, the first ferrite 23, and the electromagnetic induction receiving coil 24 are stacked sequentially at the bottom of the thermos cup body 21.

[0029] The electromagnetic induction receiving coil 24 is used to receive the alternating magnetic field emitted by the electromagnetic induction transmitting coil and to generate electrical energy using the alternating magnetic field.

[0030] The wirelessly powered thermos cup provided in this embodiment consists of two parts: a lower power supply base 10 and an upper thermos cup 20. The power supply base 10 emits a high-frequency alternating magnetic field upwards via an electromagnetic induction transmitting coil. The bottom of the thermos cup body 21 is sequentially provided with a nanocrystalline layer 22, a first ferrite 23, and an electromagnetic induction receiving coil 24 to receive the alternating magnetic field generated by the electromagnetic induction transmitting coil and convert it into usable electrical energy.

[0031] At the bottom of the thermos cup body 21, the order from closest to the power supply base 10 to closest to the bottom of the thermos cup body 21 is as follows: electromagnetic induction receiving coil 24, first ferrite 23, and nanocrystalline layer 22. The thermos cup 20 may also include a cup bottom 31, which serves as a protective base plate for the thermos cup 20 and is integrally installed with the thermos cup body 21 to protect the aforementioned electromagnetic induction receiving coil 24, first ferrite 23, and nanocrystalline layer 22. First, the electromagnetic induction receiving coil 24 generates a high-frequency alternating voltage (electrical energy) under the action of a high-frequency alternating magnetic field. The electromagnetic induction receiving coil 24 can be designed as a flat spiral winding structure, and the electromagnetic induction receiving coil 24 can be braided with multi-strand fine enameled wire to reduce the skin effect and eddy current loss at high frequencies, and ensure a higher quality factor (Q value) inside the coil, thereby improving the output of induced electrical energy.

[0032] The first ferrite 23 is attached to the back of the electromagnetic induction receiving coil 24 (further away from the power supply base). The first ferrite 23 provides a low-resistivity magnetic circuit, further concentrating and guiding the magnetic flux near the electromagnetic induction receiving coil 24 through the coil winding, reducing the scattering of the magnetic field to the sides or the cup-shaped metal. This not only significantly improves the magnetic coupling coefficient but also forms a magnetic shield on the back of the electromagnetic induction receiving coil 24, suppressing eddy current losses caused by magnetic flux entering the cup-shaped metal base, thereby reducing energy waste and further improving reception efficiency. Because the electromagnetic induction receiving coil 24 and the first ferrite 23 are attached together, they can be configured as a single receiving assembly.

[0033] A nanocrystalline layer 22 is laid closest to the bottom of the thermos cup body 21. Due to the high relative magnetic permeability of the nanocrystalline material, it can further focus and suppress the incident magnetic flux, making the magnetic flux passing through the first ferrite 23 and the electromagnetic induction receiving coil 24 more concentrated and directional. The nanocrystalline layer 22 can also block the ineffective circulation of magnetic flux between the thermos cup body 21 and the surrounding structure, reduce the eddy current loss generated at the bottom of the thermos cup, and provide better magnetic field resources for the first ferrite 23 and the electromagnetic induction receiving coil 24.

[0034] In summary, the wirelessly powered thermos cup provided in this application embodiment achieves multiple magnetic field constraints and guidance by sequentially arranging an electromagnetic induction receiving coil 24, a first ferrite 23, and a nanocrystalline layer 22 from bottom to top: the electromagnetic induction receiving coil 24 first intercepts the alternating magnetic field, the first ferrite 23 further concentrates the magnetic flux and provides back-side shielding, and the nanocrystalline layer 22 converges the magnetic flux and provides bottom protection. This multi-stage layout not only improves magnetic coupling efficiency and reduces eddy current losses generated by the thermos cup body 21, but also makes the voltage output by the electromagnetic induction receiving coil 24 more stable, providing a high-quality input for subsequent rectification, thereby improving the overall energy utilization efficiency and system reliability of the wirelessly powered thermos cup.

[0035] Figure 2 This is another structural schematic diagram of the wirelessly powered thermos cup provided in the embodiments of this application, please refer to it as well. Figures 1-2 In some embodiments, the thermos cup also includes a heating plate 25 and a circuit integrated board 26, which are stacked sequentially between the thermos cup body 21 and the nanocrystalline layer 22, and the nanocrystalline layer 22 is attached to the bottom of the circuit integrated board 26.

[0036] The circuit board 26 is used to acquire the electrical energy generated by the electromagnetic induction receiving coil 24, and after rectifying and stabilizing the electrical energy, it is transferred to the heating plate 25.

[0037] The heating plate 25 is used to convert the received electrical energy into heat energy to heat the thermos cup 20.

[0038] In this embodiment, the bottom of the thermos cup body 21 is arranged sequentially from top to bottom as follows: a heating plate 25, a circuit board 26 (i.e., a printed circuit board assembly), and a nanocrystalline layer 22. Specifically, the heating plate 25 is the first layer closest to the inner cavity of the thermos cup, followed immediately by the circuit board 26, and then the nanocrystalline layer 22 is attached to the bottom of the circuit board 26. The other side of the nanocrystalline layer 22 faces the first ferrite 23 and the electromagnetic induction receiving coil 24. A foam pad 32 can be placed between the first ferrite 23 and the circuit board 26 with the nanocrystalline layer 22 attached to its bottom for cushioning, isolation, or heat insulation protection.

[0039] When the thermos cup 20 is placed above the power supply base 10 and magnetically connected to the power supply base 10, the high-frequency alternating magnetic field emitted by the electromagnetic induction transmitting coil of the power supply base 10 will first penetrate the electromagnetic induction receiving coil 24. The electrical energy generated by the electromagnetic induction receiving coil 24 enters the circuit integrated board 26 after being optimized by the multi-level magnetic circuit of the first ferrite 23 and the nanocrystalline layer 22.

[0040] The integrated circuit board 26 is used to acquire the electrical energy generated by the electromagnetic induction receiving coil 24 and to rectify and regulate this electrical energy. Specifically, the integrated circuit board 26 is equipped with a rectifier module (such as a full-bridge rectifier diode or a synchronous rectifier MOSFET), a filter capacitor, and power management circuits such as a voltage regulator / boost-buck converter. These circuits work together to convert the high-frequency AC voltage output by the receiving coil into a stable and controllable DC voltage. The integrated circuit board 26 can also be equipped with a control circuit for intelligent control of the temperature and power of the thermos cup.

[0041] The nanocrystalline layer 22 confines the magnetic flux to the electromagnetic induction receiving coil 24, and the first ferrite 23 provides a low magnetic reluctance path for the coil, resulting in a higher induced voltage. After this voltage enters the circuit integrated board 26, the AC signal is first rectified into pulsating DC by the rectifier module, then smoothed into a stable DC bus voltage by the filter capacitor, and finally adjusted to the operating voltage required by the voltage regulator / boost-buck module to meet the requirements of different heating powers.

[0042] The heating plate 25 is located above the circuit integrated board 26 and outside the nanocrystalline layer 22. In this embodiment, it is the device responsible for converting electrical energy into heat energy. When the DC power output from the circuit integrated board 26 is applied to the heating plate 25, it generates stable and uniform heat, which is then transferred to the liquid in the thermos cup 20 to achieve rapid heating and heat preservation functions.

[0043] In some embodiments, the thermos cup 20 also includes a battery 27 disposed between the circuit board 26 and the heating plate 25;

[0044] The battery 27 is used to receive and store the electrical energy transmitted by the circuit board 26, and to transmit the stored electrical energy to the heating plate 25 when the thermos cup 20 is not connected to the power supply base 10.

[0045] In this embodiment, an additional battery 27 is added between the circuit board 26 and the heating plate 25 of the thermos cup, so that the thermos cup 20 can still maintain its heating function when it is disconnected from the power supply base 10. Specifically, from the bottom 31 of the cup inward, the following are arranged in sequence: nanocrystalline layer 22, circuit board 26, battery 27 and heating plate 25: the nanocrystalline layer 22 is in close contact with the bottom of the circuit board 26 to constrain the magnetic flux and reduce eddy current loss; the circuit board 26 is located on the nanocrystalline layer 22 and is used to rectify, filter and regulate the electrical energy generated by the electromagnetic induction receiving coil 24; the battery 27 is located on the top of the circuit board 26; the heating plate 25 is closest to the body 21 of the thermos cup and generates heat through electrical energy conversion.

[0046] Specifically, the battery 27 can be fixed to the top of the circuit board 26 by the battery frame 33. From bottom to top, heat sink 34, sealing ring 35, and heat insulation cotton 36 can be arranged between the battery 27 and the heating plate 25. The heating plate 25 and the thermos cup body 21 are bonded together using 3M adhesive 37. The heating plate 25 and the heat insulation cotton 36 can be fixed together using a foam assembly 38.

[0047] When the thermos cup 20 is connected to the power supply base 10, the high-frequency alternating magnetic field emitted by the electromagnetic induction transmitting coil of the power supply base 10 passes through the electromagnetic induction receiving coil 24, and the generated electrical energy first enters the circuit integrated board 26. The rectification and voltage regulation circuit on the circuit integrated board 26 converts the induced high-frequency AC voltage into a stable DC voltage. On the one hand, the DC voltage is transmitted to the heating plate 25 through the voltage regulation / buck-boost module, providing a continuous power supply for the heating plate 25; on the other hand, the DC power is transmitted to the battery 27 through the built-in charging management circuit of the circuit integrated board 26, so that the battery 27 can complete charging and store electrical energy. At this time, the battery 27 not only continuously receives charging current from the circuit integrated board 26, but also keeps itself in a fully charged or working state at all times, ready for subsequent use.

[0048] When the thermos cup is detached from the power supply base, the electromagnetic induction receiving coil 24 no longer generates induced electrical energy. At this time, the battery 27 immediately takes over the role of supplying power to the heating plate 25. Specifically, the battery 27 transfers its stored DC power to the voltage regulator module of the circuit board 26 through its internal connection circuit. After necessary voltage regulation, the power is then delivered to the heating plate 25. Upon receiving the stable DC power supplied by the battery 27, the heating plate 25 begins to heat up. Through the heat-conducting structure with the inner liner of the cup, it transfers heat to the liquid inside the cup, thus achieving the function of continuous heating and heat preservation of the contents of the thermos cup 20.

[0049] By embedding a battery 27 between the circuit board 26 and the heating plate 25, this embodiment achieves a dual heating mechanism of "online power supply + offline power supply": when connected to the power supply base 10, the battery 27 is efficiently charged by the circuit board 26 and supplies power in parallel with the heating plate 25; when disconnected from the power supply base 10, the battery 27 automatically switches to become the sole power source, providing heat output to the heating plate 25. This design not only meets the user's need for continuous heat preservation in mobile scenarios, but also maintains the temperature inside the thermos when there is a power outage or the power supply base 10 is inconvenient to use, significantly improving the convenience and reliability of the wirelessly powered thermos.

[0050] In some embodiments, the thermos cup body 21 is composed of double-layer stainless steel, with an insulating layer (not shown in the figure) disposed between the double-layer stainless steel.

[0051] In some embodiments, the thermos cup body 21 adopts a double-layer stainless steel structure, that is, it is composed of an inner layer of stainless steel and an outer layer of stainless steel, forming a closed space in the middle, and an insulation layer is provided in the space.

[0052] Specifically, the double-walled stainless steel cup body can be composed of two concentric stainless steel metal walls. The inner stainless steel layer is in direct contact with the liquid or heating element inside the cup, responsible for bearing heat energy and heating and maintaining the temperature of the liquid; the outer stainless steel layer serves as the outer wall of the cup, providing both mechanical strength and ease of decoration and cleaning. By using double-walled stainless steel, the cup body has excellent corrosion resistance, wear resistance, and structural stability, and will not deform or be damaged due to frequent heating or impact.

[0053] A heat insulation layer is installed between these two layers of stainless steel. The heat insulation layer can take one of the following forms:

[0054] Vacuum insulation: The space between the inner and outer stainless steel layers is evacuated to form a vacuum layer, so that there is no air or other heat-conducting medium between the two stainless steel layers, thereby greatly reducing heat conduction and convection losses.

[0055] Foamed insulation: Foamed insulation material (such as polyurethane foam) is filled between two layers of stainless steel. The foamed material blocks heat conduction channels through its microporous structure;

[0056] Other thermal insulation fillers: New thermal insulation materials such as vacuum + microparticle filling (e.g., vacuum microspheres) and aerogel sheets are used.

[0057] By combining an insulation layer with double-walled stainless steel, the cup body can maintain a stable internal temperature for a longer period of time, providing excellent heat retention whether the liquid is hot or cold. For a wirelessly powered thermos, this means that even when internal heating stops or the battery life is activated, the liquid temperature inside the cup will still remain within the set range, further enhancing the user experience.

[0058] In some embodiments, the power supply base 10 includes a power supply module, an electromagnetic induction transmitting coil is disposed in the power supply module, and the power supply module also includes a second ferrite and a heat sink, with the electromagnetic induction transmitting coil, the second ferrite and the heat sink being stacked in sequence.

[0059] In this embodiment, the power supply base 10 includes a power supply module (not shown in the figure), within which an electromagnetic induction transmitting coil is located closest to the thermos cup 20. This electromagnetic induction transmitting coil can employ a flat, disc-shaped helical winding structure, with the wire diameter and number of turns optimized according to the target operating frequency to generate a high-intensity alternating magnetic field under circuit drive. The electromagnetic induction transmitting coil converts the input power supply into a high-frequency alternating current, thereby driving the transmitting coil to output a continuous and stable alternating magnetic field. This alternating magnetic field radiates upwards, aiming to achieve magnetic coupling with the electromagnetic induction receiving coil 24 on the thermos cup 20 side, thus realizing energy transfer.

[0060] Located below the electromagnetic induction transmitting coil is a second ferrite (not shown in the figure). This second ferrite can be made of a soft magnetic material with high permeability (such as Mn-Zn-based or Ni-Zn-based ferrite), and its thickness can be set between 1 mm and 3 mm. This second ferrite can be attached tightly to the opposite side of the electromagnetic induction transmitting coil, mainly serving two purposes:

[0061] First, the magnetic field is concentrated and shielded. Second, the ferrite provides a low magnetic resistance magnetic circuit for the electromagnetic induction transmitting coil, so that the alternating magnetic flux generated by the electromagnetic induction transmitting coil is concentrated upwards more, reducing the ineffective divergence of the magnetic field downwards (i.e. to the inside of the base and the surrounding environment), thereby improving the magnetic coupling efficiency.

[0062] Secondly, it reduces electromagnetic interference and eddy current losses. Because a metal structure or circuit board can be placed below the electromagnetic induction transmitting coil, without ferrite shielding, alternating magnetic flux will induce eddy currents in these metal components, leading to energy waste and localized heating. The second ferrite effectively reduces eddy current losses on the internal metal or circuit board of the base 10 by absorbing and redirecting the magnetic flux, and also reduces electromagnetic interference to surrounding electronic components.

[0063] A heat sink (not shown in the figure) is located below the second ferrite. The heat sink can be made of aluminum alloy or copper, and its surface is machined into a multi-fin structure to greatly increase the contact area with the air, and can quickly dissipate heat to the external environment through natural convection or fan assistance.

[0064] Those skilled in the art will understand that the power supply module may also include a circuit board on which circuit modules for functions such as rectification, voltage regulation, and filtering are provided.

[0065] In some embodiments, the power supply base 10 further includes a bottom shell, which is connected to the power supply module via thermally conductive silicone.

[0066] In this embodiment, the power supply base 10 also includes a bottom shell (not shown in the figure), which is connected to the power supply module via thermally conductive silicone (not shown in the figure). Specifically, after the power supply module (including an electromagnetic induction transmitting coil, a second ferrite, and a heat sink, and may also include a circuit board) is assembled, a surface for contact with the bottom shell is reserved on its bottom or side. A layer of thermally conductive silicone of appropriate thickness is first coated or applied to this contact surface, and then the power supply module is fixed inside the bottom shell. The thermally conductive silicone can directly contact the circuit board in the power supply module. In this way, the thermally conductive silicone fills any small gaps that may exist between the power supply module and the bottom shell, enabling a good heat conduction channel between them; on the other hand, it also provides a certain mechanical buffering effect, reducing damage to electronic components under vibration or force.

[0067] In some implementations, the bottom shell is made of metal.

[0068] In this embodiment, the base shell is made of metal. Firstly, the metal base shell possesses excellent mechanical strength and structural support. Compared to plastic or composite materials, the metal base shell can better support the power supply module (including the electromagnetic induction transmitting coil, the second ferrite, and the heat sink) and the weight of the entire device, ensuring that it will not deform or be damaged due to bumps or pressure during daily use or transportation. Simultaneously, the metal base shell and the power supply module are tightly connected via thermally conductive silicone, resulting in a more robust overall structure and avoiding the risk of poor contact caused by loosening. This ensures that the wireless power supply base maintains stability and reliability during long-term repeated placement and movement.

[0069] Secondly, the metal base and the heat sink of the power supply module are connected by thermally conductive silicone to form an efficient thermal management channel. When the electromagnetic induction transmitting coil is working continuously, the generated heat is first absorbed by the heat sink, then conducted to the surface of the metal base through the thermally conductive silicone, and finally dissipated through natural or forced convection between the base and the ambient air. Because metal itself has a high thermal conductivity and heat capacity, the metal base can quickly disperse and release the heat energy transferred from the heat sink, preventing the internal temperature of the base 10 from becoming too high, thereby ensuring that the internal components operate stably within a safe temperature range for a long time.

[0070] In some implementations, the inductance of the electromagnetic induction transmitting coil is greater than or equal to 9uH and less than or equal to 11uH, and the static resistance of the electromagnetic induction transmitting coil is greater than or equal to 45mΩ and less than or equal to 55mΩ.

[0071] In this embodiment, the inductance of the electromagnetic induction transmitting coil is limited to 9μH≤L≤11μH, and its static resistance is limited to 45mΩ≤R≤55mΩ. These parameter ranges not only meet the resonant matching requirements of typical wireless power supply systems, but also play a crucial role in reducing coil losses, improving the quality factor, and ensuring heat dissipation and stability, ultimately achieving efficient, stable, and secure wireless power transmission.

[0072] In some embodiments, the inductance of the electromagnetic induction receiving coil 24 is greater than or equal to 7.38uH and less than or equal to 9.02uH, and the static resistance of the electromagnetic induction receiving coil 24 is less than or equal to 80mΩ.

[0073] In this embodiment, the inductance of the electromagnetic induction receiving coil 24 is limited to 7.38μH≤L≤9.02μH, and its static resistance R≤80mΩ. Setting these two parameter ranges allows the receiving end resonant circuit to achieve optimal resonance and quality factor in the target operating frequency band, while also considering temperature rise and cost. This significantly improves electromagnetic coupling efficiency, reduces transmission loss, and ensures efficient, stable, and reliable energy reception for the wirelessly powered thermos cup in various usage scenarios.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0075] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0076] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A wirelessly powered thermos cup, characterized in that, The wirelessly powered thermos includes: A power supply base, on which an electromagnetic induction transmitting coil is provided; A thermos cup, comprising a thermos cup body, a nanocrystalline layer, a first ferrite, and an electromagnetic induction receiving coil, wherein the nanocrystalline layer, the first ferrite, and the electromagnetic induction receiving coil are sequentially stacked at the bottom of the thermos cup body. The electromagnetic induction receiving coil is used to receive the alternating magnetic field emitted by the electromagnetic induction transmitting coil and to generate electrical energy using the alternating magnetic field.

2. The wirelessly powered thermos cup according to claim 1, characterized in that, The thermos cup also includes a heating plate and a circuit integrated board. The heating plate and the circuit integrated board are stacked sequentially between the thermos cup body and the nanocrystalline layer. The nanocrystalline layer is attached to the bottom of the circuit integrated board. The circuit integrated board is used to acquire the electrical energy generated by the electromagnetic induction receiving coil, and after rectifying and stabilizing the electrical energy, it is transmitted to the heating plate. The heating plate is used to convert the received electrical energy into heat energy to heat the thermos cup.

3. The wirelessly powered thermos cup according to claim 2, characterized in that, The thermos also includes a battery, which is disposed between the circuit board and the heating plate; The battery is used to receive and store electrical energy transmitted by the circuit board, and to transmit the stored electrical energy to the heating plate when the thermos is not connected to the power supply base.

4. The wirelessly powered thermos cup according to claim 2, characterized in that, The heating plate is a flexible printed circuit heating plate.

5. The wirelessly powered thermos cup according to claim 1, characterized in that, The thermos cup body is composed of double-layer stainless steel, with a heat insulation layer between the two layers of stainless steel.

6. The wirelessly powered thermos cup according to claim 1, characterized in that, The power supply base includes a power supply module, the electromagnetic induction transmitting coil is disposed in the power supply module, the power supply module also includes a second ferrite and a heat sink, and the electromagnetic induction transmitting coil, the second ferrite and the heat sink are stacked in sequence.

7. The wirelessly powered thermos cup according to claim 6, characterized in that, The power supply base also includes a bottom shell, which is connected to the power supply module via thermally conductive silicone.

8. The wirelessly powered thermos cup according to claim 7, characterized in that, The bottom shell is made of metal.

9. The wirelessly powered thermos cup according to claim 1, characterized in that, The inductance of the electromagnetic induction transmitting coil is greater than or equal to 9uH and less than or equal to 11uH, and the static resistance of the electromagnetic induction transmitting coil is greater than or equal to 45mΩ and less than or equal to 55mΩ.

10. The wirelessly powered thermos cup according to claim 1, characterized in that, The inductance of the electromagnetic induction receiving coil is greater than or equal to 7.38uH and less than or equal to 9.02uH, and the static resistance of the electromagnetic induction receiving coil is less than or equal to 80mΩ.

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