Wireless energy receiver and implantable device
By employing a vertically stacked structure and compact design for the wireless energy receiver, the problem of excessively large receiver size in traditional wireless charging systems is solved. This achieves efficient energy capture and magnetic coupling, making it suitable for space-constrained applications, especially medical implant devices.
Patent Information
- Application Number
- CN202423047670.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Traditional wireless charging systems use resonant circuits, which result in excessively large receiver devices, making them unsuitable for space-constrained applications.
A vertically stacked structure of wireless power receivers is adopted, including wireless power receiving coils, top and bottom magnetic cores, resonant inductors and resonant compensation capacitors, forming a hollow structure to accommodate the resonant compensation capacitors, and connecting the resonant compensation capacitors to the resonant inductors, thus designing a compact and efficient resonant circuit.
It significantly reduces the size of the receiver, making it suitable for space-constrained applications. It improves energy capture efficiency and magnetic coupling efficiency, reduces energy leakage, achieves electromagnetic shielding, and is highly adaptable to complex electromagnetic environments.
Smart Images
Figure CN223639033U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wireless energy transmission equipment technical field especially relates to a wireless energy receiver and implantable equipment. BACKGROUND
[0002] Traditional wireless charging technology mainly relies on electromagnetic induction principle, the most common is near field coupling mode, and its working principle is to transmit electric energy through the magnetic field coupling between two coils, when the current flows through the coil of the transmitting end, varying magnetic field is generated, according to Faraday's law of electromagnetic induction, the coil of the receiving end in the magnetic field will induce voltage, thereby realizing the transmission of energy.
[0003] And in the traditional wireless charging system, the receiving end is additionally provided with a resonance circuit to optimize the energy transmission efficiency, the resonance circuit usually includes inductance and capacitance elements to achieve the purpose of matching the frequency of the transmitting end, but the existence of the resonance circuit makes the device of the receiving end bulky, which cannot be applied to some space-limited application scenarios. SUMMARY
[0004] In view of the above-mentioned deficiencies existing in the prior art, the utility model provides a wireless energy receiver and implantable equipment, which solves the technical problems that the existence of the resonance circuit in the wireless charging system of the prior art makes the device of the receiving end too large and the use range is small.
[0005] The utility model provides a wireless energy receiver in one aspect, including wireless energy receiving coil, top layer magnetic core, resonance inductance coil, bottom layer magnetic core and resonance compensation capacitor;
[0006] The wireless energy receiving coil, the top layer magnetic core, the resonance inductance coil and the bottom layer magnetic core are sequentially stacked from top to bottom;
[0007] The wireless energy receiving coil, the top layer magnetic core and the resonance inductance coil are all hollow structures to form a placing cavity in the center of the wireless energy receiver;
[0008] The resonance compensation capacitor is arranged in the placing cavity, and the wireless energy receiving coil is connected with the resonance inductance coil through the resonance compensation capacitor to form a resonance circuit.
[0009] Optionally, the number of resonance compensation capacitors is one, and the resonance compensation capacitor is a first resonance compensation capacitor;
[0010] The first connecting end of the wireless energy receiving coil is connected with the first connecting end of the resonance inductance coil, and the first connecting end of the wireless energy receiving coil is also connected with the first end of the first resonance compensation capacitor;
[0011] The second connection end of the wireless energy receiving coil is connected with the second end of the first resonance compensation capacitor, and the second connection end of the wireless energy receiving coil and the second connection end of the resonance inductive coil are respectively connected with other functional circuits.
[0012] Optionally, the number of the resonance compensation capacitors is two, and the resonance compensation capacitors include a second resonance compensation capacitor and a third resonance compensation capacitor.
[0013] The first connection end of the wireless energy receiving coil is connected with the first end of the second resonance compensation capacitor, the second end of the second resonance compensation capacitor is connected with the first connection end of the resonance inductive coil, and the second end of the second resonance compensation capacitor is also connected with the first end of the third resonance compensation capacitor.
[0014] The second connection end of the wireless energy receiving coil is connected with the second end of the third resonance compensation capacitor, and the second connection end of the wireless energy receiving coil and the second connection end of the resonance inductive coil are respectively connected with other functional circuits.
[0015] Optionally, the wireless energy receiving coil and the resonance inductive coil are both annular flat coils, and the wireless energy receiving coil and the resonance inductive coil have the same size and shape.
[0016] Optionally, the top layer magnetic core is an annular hollow flat Mn-Zn ferrite.
[0017] Optionally, the width of the top layer magnetic core is greater than the width of the wireless energy receiving coil, and the width of the top layer magnetic core is greater than the width of the resonance inductive coil.
[0018] Optionally, the bottom layer magnetic core is a circular solid flat Mn-Zn ferrite.
[0019] Optionally, the outer diameter of the bottom layer magnetic core is equal to the outer diameter of the top layer magnetic core.
[0020] Optionally, the inner diameters of the wireless energy receiving coil, the top layer magnetic core and the resonance inductive coil are equal.
[0021] The utility model discloses another aspect provides a kind of implantable device, including the wireless energy receiver as any above described.
[0022] The wireless energy receiver and the implantable device provided by the utility model have perpendicular stacked structure, which greatly reduces the volume of the receiver, is suitable for occasions with limited space and has a relatively wide application range; the hollow structure of the receiver forms a placing cavity for accommodating resonance compensation capacitor, further saves space and makes the whole receiver more compact; the wireless energy receiving coil is connected with the resonance inductance coil through the resonance compensation capacitor, forms high-efficiency resonance circuit and maximizes energy capture efficiency; the design of the top magnetic core and the bottom magnetic core helps to concentrate magnetic field, reduces energy leakage, improves magnetic coupling efficiency and realizes electromagnetic shielding.
[0023] Other features and advantages of the present application will be further described in the following specification, and some of them will become apparent from the specification, or will be understood from the practice of the present application. The objectives and other advantages of the present application can be realized and obtained by the structure particularly pointed out in the written specification, claims and drawings.
[0024] The technical solutions of the present application will be further described in detail below with the help of drawings and examples. BRIEF DESCRIPTION OF DRAWINGS
[0025] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation to the present application. In the drawings:
[0026] Figure 1 The whole structure schematic diagram of the wireless energy receiver in one embodiment provided by the present application;
[0027] Figure 2 The circuit diagram of the resonance circuit in the wireless energy receiver in one embodiment provided by the present application;
[0028] Figure 3 The circuit diagram of the resonance circuit in the wireless energy receiver in another embodiment provided by the present application;
[0029] Figure 4 The structure schematic diagram of the wireless energy receiving coil or the resonance inductance coil in the wireless energy receiver in one embodiment provided by the present application;
[0030] Figure 5 The structure schematic diagram of the top magnetic core in the wireless energy receiver in one embodiment provided by the present application;
[0031] Figure 6 The structure schematic diagram of the bottom magnetic core in the wireless energy receiver in one embodiment provided by the present application.
[0032] In the drawings:
[0033] 1, wireless energy receiving coil; 2, top magnetic core; 3, resonant inductor coil; 4, bottom magnetic core; 5, placement cavity;
[0034] C1, first resonant compensation capacitor; C2, second resonant compensation capacitor; C3, third resonant compensation capacitor;
[0035] a1, first connection end of wireless energy receiving coil; a2, second connection end of wireless energy receiving coil;
[0036] b1, first connection end of resonant inductor coil; b2, second connection end of resonant inductor coil. DETAILED DESCRIPTION
[0037] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0038] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0039] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0040] The present application provides a wireless energy receiver, which comprises Figure 1As shown, it comprises a wireless energy receiving coil 1, a top layer magnetic core 2, a resonant inductive coil 3, a bottom layer magnetic core 4 and a resonant compensation capacitor; the wireless energy receiving coil 1, the top layer magnetic core 2, the resonant inductive coil 3 and the bottom layer magnetic core 4 are sequentially stacked from top to bottom; the wireless energy receiving coil 1, the top layer magnetic core 2 and the resonant inductive coil 3 are all hollow structures to form a placement cavity 5 in the center of the wireless energy receiver; the resonant compensation capacitor is arranged in the placement cavity 5, and the wireless energy receiving coil 1 is connected with the resonant inductive coil 3 through the resonant compensation capacitor to form a resonant circuit.
[0041] The wireless energy receiver provided by the utility model has a vertical stacked structure which greatly reduces the volume of the receiver, is suitable for application in occasions with limited space and has a relatively wide application range; the hollow structure of the receiver forms a placement cavity 5 for accommodating the resonant compensation capacitor, further saves space and makes the whole receiver more compact; the wireless energy receiving coil 1 is connected with the resonant inductive coil 3 through the resonant compensation capacitor to form a high-efficiency resonant circuit, maximizes energy capture efficiency; the design of the top layer magnetic core 2 and the bottom layer magnetic core 4 helps to concentrate a magnetic field, reduces energy leakage, improves magnetic coupling efficiency and realizes electromagnetic shielding.
[0042] Specifically, in the above embodiment, as shown in Figure 2 The number of the resonant compensation capacitor is one, and the resonant compensation capacitor is a first resonant compensation capacitor C1; a first connecting end a1 of the wireless energy receiving coil is connected with a first connecting end b1 of the resonant inductive coil, and the first connecting end a1 of the wireless energy receiving coil is also connected with a first end of the first resonant compensation capacitor C1; a second connecting end a2 of the wireless energy receiving coil is connected with a second end of the first resonant compensation capacitor C1, and the second connecting end a2 of the wireless energy receiving coil and a second connecting end b2 of the resonant inductive coil are respectively connected with other functional circuits.
[0043] In the embodiment, only the single first resonant compensation capacitor C1 is used to realize the resonant function, the number of components is reduced, the manufacturing complexity and cost are reduced, the circuit is also more concise, the resonant frequency is fine-tuned by simply adjusting the value of the first resonant compensation capacitor C1 to adapt to different working conditions or optimize the performance in specific application scenarios, and debugging and maintenance are facilitated; the resonant loop formed can maximize energy capture efficiency.
[0044] Specifically, in the above embodiment, as shown in Figure 3As shown, the number of resonance compensation capacitors is two, and the resonance compensation capacitors include a second resonance compensation capacitor C2 and a third resonance compensation capacitor C3; the first connection end a1 of the wireless energy receiving coil is connected to the first end of the second resonance compensation capacitor C2, the second end of the second resonance compensation capacitor C2 is connected to the first connection end b1 of the resonance inductive coil, and the second end of the second resonance compensation capacitor C2 is also connected to the first end of the third resonance compensation capacitor C3; the second connection end a2 of the wireless energy receiving coil is connected to the second end of the third resonance compensation capacitor C3, and the second connection end a2 of the wireless energy receiving coil and the second connection end b2 of the resonance inductive coil are respectively connected to other functional circuits.
[0045] In the present embodiment, by introducing the second resonance compensation capacitor C2 and the third resonance compensation capacitor C3, precise resonance matching can be achieved in a wider frequency range, each capacitor can be optimized for different frequency points, so that the receiver can maintain high efficiency at multiple operating frequencies, enhancing the adaptability and robustness of the system, especially in the case of frequency fluctuations at the transmitting end or the presence of multi-band applications; the combination of two resonance compensation capacitors provides more degrees of freedom to adjust the total capacitance value of the resonance circuit, thereby better matching the impedance requirements under different load conditions, which helps to maximize energy transmission efficiency and reduce reflection loss. Therefore, by setting two resonance compensation capacitors, not only the precision and flexibility of the resonance circuit are improved, but also the anti-interference ability and adaptability of the receiver are enhanced, which is particularly suitable for occasions that need to work stably in complex electromagnetic environments.
[0046] Specifically, in the above embodiment, as shown in Figure 4 The wireless energy receiving coil 1 and the resonance inductive coil 3 are both annular flat coils, and have the same size and shape.
[0047] In the present embodiment, the wireless energy receiving coil 1 and the resonance inductive coil 3 are completely identical in shape and size, and the magnetic field distribution is more uniform and symmetrical, which helps to enhance the magnetic coupling efficiency and reduce the loss in the energy transmission process; the same geometric structure ensures that the mutual inductance coefficient of the two reaches the maximum value, thereby improving the transmission efficiency of energy from the transmitting end to the receiving end; the annular flat design allows the coils to be stacked together in a compact manner, making full use of limited space, and the symmetrical structure of the annular flat coil helps to reduce the influence of external electromagnetic interference, while also serving as a natural shielding barrier to protect the internal circuit from external noise interference.
[0048] Specifically, in the above embodiment, as shown in Figure 5 The top magnetic core 2 is an annular hollow flat manganese-zinc ferrite.
[0049] In this embodiment, the manganese-zinc ferrite material has a high initial permeability, which can more effectively guide and concentrate the magnetic field, reduce magnetic flux leakage, and thus improve the energy transmission efficiency, and the manganese-zinc ferrite exhibits a low magnetic core loss at high frequencies, which reduces heat generation and improves the overall efficiency of the receiver; the top layer magnetic core 2 has a ring structure, which is also convenient for placing the resonant compensation capacitor in the placement cavity 5.
[0050] Further, the width of the top layer magnetic core 2 is greater than the width of the wireless energy receiving coil 1, and the width of the top layer magnetic core 2 is greater than the width of the resonant inductor coil 3.
[0051] In this embodiment, the wider design of the top layer magnetic core 2 provides a larger magnetic flux path, which can more effectively guide and concentrate the magnetic field, reduce magnetic flux leakage, and enhance the magnetic coupling effect between the wireless energy receiving coil 1 and the resonant inductor coil 3, thereby improving the energy transmission efficiency; the wider magnetic core helps to form a more uniform magnetic field distribution around the wireless energy receiving coil 1 and the resonant inductor coil 3, avoiding edge effects and other irregular phenomena, and ensuring stable energy transfer; the wider top layer magnetic core 2 can better shield external electromagnetic interference and protect the internal circuit from external noise; by concentrating and limiting the magnetic field, the electromagnetic radiation to the external environment is reduced, and the electromagnetic compatibility of the system is improved, ensuring that it can work normally in a complex electromagnetic environment; at the same time, the wider magnetic core can completely cover the wireless energy receiving coil 1 and the resonant inductor coil 3, providing better physical support and protection, and making the entire receiver more compact.
[0052] Specifically, in the above embodiment, as shown in Figure 6 the bottom layer magnetic core 4 is a circular solid flat manganese-zinc ferrite.
[0053] In this embodiment, the bottom layer magnetic core 4 is made of the same material as the top layer magnetic core 2; the bottom layer magnetic core 4 provides excellent mechanical strength and stability as the bottom layer structure of the receiver, can withstand a large mechanical stress, and reduces the risk of damage caused by vibration or other physical impact, and the circular solid structure of the bottom layer magnetic core 4 provides a full-range electromagnetic shielding effect, effectively isolating external electromagnetic interference.
[0054] Further, the outer diameter of the bottom layer magnetic core 4 is equal to that of the top layer magnetic core 2.
[0055] In the embodiment, when the outer diameters of the top magnetic core 2 and the bottom magnetic core 4 are equal, a symmetrical and uniform magnetic field environment can be formed in the entire receiver, which helps to ensure that the distribution of the magnetic field between the receiving coil and the resonant inductor coil 3 is more uniform, reduces edge effects and other irregular phenomena, and thus improves the energy transmission efficiency; and the equal outer diameters enable the top magnetic core 2 and the bottom magnetic core 4 to jointly provide a continuous and closed magnetic flux path, maximally reduces magnetic flux leakage, enhances the magnetic coupling effect, and at the same time effectively isolates external electromagnetic interference, protecting the internal circuit from external noise.
[0056] Specifically, in the above embodiment, the inner diameters of the wireless energy receiving coil 1, the top magnetic core 2, and the resonant inductor coil 3 are equal.
[0057] In the embodiment, the equal inner diameters can form a uniform-diameter placement cavity 5 in the center of the receiver for accommodating the resonant compensation capacitor and other key components, further optimizing the spatial layout, and enabling the various components to be closely stacked together to fully utilize the limited space, so that the top magnetic core 2, the wireless energy receiving coil 1, and the resonant inductor coil 3 can jointly provide a continuous and closed magnetic flux path, maximally reduce magnetic flux leakage, enhance the magnetic coupling effect, and at the same time form a complete electromagnetic shielding layer to effectively isolate external electromagnetic interference.
[0058] The utility model provides another implantable device, which comprises the wireless energy receiver.
[0059] The implantable device provided by the application applies the wireless energy receiver to the implantable device, significantly improves the performance of the device, especially in terms of efficient energy transmission, compact design, electromagnetic compatibility, mechanical stability, biocompatibility, and long-term reliability; the wireless energy receiver provided by the application is particularly suitable for medical applications that require long-term stable operation and have strict requirements on size, weight, and safety, such as cardiac pacemakers and neurostimulators, which not only can improve charging efficiency and device life, but also can ensure the safety and comfort of patients, and provides strong support for the development of medical technology.
[0060] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model also intends to include these modifications and variations.
Claims
1. A wireless energy receiver, characterized by The wireless energy receiving coil (1), the top layer magnetic core (2), the resonant inductive coil (3) and the bottom layer magnetic core (4) are sequentially stacked from top to bottom. The wireless energy receiving coil (1), the top layer magnetic core (2) and the resonant inductive coil (3) are all hollow structures to form a placement cavity (5) in the center of the wireless energy receiver. The resonant compensation capacitor is arranged in the placement cavity (5), and the wireless energy receiving coil (1) is connected with the resonant inductive coil (3) through the resonant compensation capacitor to form a resonant circuit. The number of the resonant compensation capacitor is one, and the resonant compensation capacitor is a first resonant compensation capacitor.
2. The wireless energy receiver of claim 1, wherein, The first connection end of the wireless energy receiving coil (1) is connected with the first connection end of the resonant inductive coil (3), and the first connection end of the wireless energy receiving coil (1) is also connected with the first end of the first resonant compensation capacitor. The second connection end of the wireless energy receiving coil (1) is connected with the second end of the first resonant compensation capacitor, and the second connection end of the wireless energy receiving coil (1) and the second connection end of the resonant inductive coil (3) are respectively connected with other functional circuits. The number of the resonant compensation capacitor is two, and the resonant compensation capacitor includes a second resonant compensation capacitor and a third resonant compensation capacitor.
3. The wireless energy receiver of claim 1, wherein, The first connection end of the wireless energy receiving coil (1) is connected with the first end of the second resonant compensation capacitor, the second end of the second resonant compensation capacitor is connected with the first connection end of the resonant inductive coil (3), and the second end of the second resonant compensation capacitor is also connected with the first end of the third resonant compensation capacitor. The second connection end of the wireless energy receiving coil (1) is connected with the second end of the third resonant compensation capacitor, and the second connection end of the wireless energy receiving coil (1) and the second connection end of the resonant inductive coil (3) are respectively connected with other functional circuits. The wireless energy receiving coil (1) and the resonant inductive coil (3) are both annular flat coils, and the wireless energy receiving coil (1) and the resonant inductive coil (3) have the same size and shape.
4. The wireless energy receiver of claim 1, wherein, The top layer magnetic core (2) is an annular hollow flat manganese-zinc ferrite.
5. The wireless energy receiver of claim 1, wherein, The width of the top layer magnetic core (2) is greater than the width of the wireless energy receiving coil (1), and the width of the top layer magnetic core (2) is greater than the width of the resonant inductive coil (3).
6. The wireless energy receiver according to claim 1 or 5, characterized in that, The bottom layer magnetic core (4) is a circular solid flat manganese-zinc ferrite.
7. The wireless energy receiver of claim 1, wherein, The outer diameter of the bottom layer magnetic core (4) is equal to that of the top layer magnetic core (2).
8. The wireless energy receiver according to claim 1 or 7, characterized in that, The inner diameters of the wireless energy receiving coil (1), the top layer magnetic core (2) and the resonant inductive coil (3) are all equal.
9. The wireless energy receiver of claim 1, wherein, The wireless energy receiving coil (1), the top layer magnetic core (2) and the resonant inductive coil (3) are all hollow structures to form a placement cavity (5) in the center of the wireless energy receiver.
10. An implantable device, comprising: