Implantable resonant generator with high energy output

Abstract

The invention discloses an implantable resonant generator with high energy output. The implantable resonant generator comprises an energy acquisition unit and an energy output unit. Wherein the energy acquisition unit comprises a permanent magnet, a magnetic induction coil and a cylindrical support body, and can collect mechanical energy generated under slight vibration and further convert the mechanical energy into electric energy; the energy output unit comprises a patch rectifier bridge and a monolithic capacitor, and can output the electric energy generated by the resonant generator device as stable DC voltage and DC current. The device has the advantages of being small in size, light in weight, simple in structure, good in weather resistance and the like, and can provide an energy source for medical electronic devices implanted into the human body, such as a cardiac pacemaker and the like. A series of follow-up problems that medical electronic devices need to be replaced in an operation due to energy exhaustion can be effectively avoided.

Description

Technical Field

[0001] This invention belongs to the field of human body self-generating technology, and in particular relates to an implantable resonant generator that can generate high energy output by using slight vibrations. Background Technology

[0002] With the rapid development of medical technology, an increasing number of implantable electronic therapeutic devices, such as pacemakers, neurostimulators, and implantable infusion pumps, have been widely used in clinical treatment. These devices work continuously inside the human body, providing patients with great convenience and improved treatment outcomes.

[0003] However, these implantable electronic therapeutic devices generally face a common problem: the sustainability of their energy supply. As described in reference 1 (Lai Z, Xu J, Bowen CR, et al. Self-powered and self-sensing devices based on human motion[J]. Joule, 2022, 6(7): 1501-1565.), traditional implantable medical devices typically rely on batteries for power, but batteries have limited energy and gradually deplete over time. To maintain the normal operation of the device, patients have to undergo frequent surgeries to replace the batteries, which not only increases the patient's pain and financial burden but may also bring surgical risks such as infection. Therefore, developing a self-sufficient, continuously powered implantable medical device has become an important research direction in the field of self-powered devices. Summary of the Invention

[0004] The purpose of this invention is to address the energy needs of patients using implantable electronic therapy devices by providing a high-energy-output implantable resonant generator.

[0005] The technical solution to achieve the purpose of this invention is:

[0006] A high-energy-output implantable resonant generator is fabricated in the following manner:

[0007] The specific steps include the following:

[0008] Step 1: Construction of the energy harvesting unit

[0009] A neodymium iron boron (N52) cylindrical magnet, 15mm high and 5mm in diameter, is used and magnetized axially. The permanent magnet is vertically placed inside the cylindrical device, with a magnetic disc of the same polarity below. Utilizing the principle of like poles repulsion, the cylindrical magnet is suspended inside the cylinder. Induction coils with a diameter of 0.05mm are wound around the outside of the cylinder. Two coils, each with 450 turns, 10mm wide, and 5mm apart, are connected in a 1-3 series connection with 2 and 4 external connections. The cylindrical support is manufactured using 3D printing technology, with sliding rails on the inner wall and a smooth outer wall.

[0010] Step 2: Construction of the energy output unit

[0011] The energy output unit consists of a surface-mount rectifier bridge, a monolithic capacitor, and a voltage regulator. The surface-mount rectifier bridge converts the AC power generated by the energy harvesting unit into DC power, while the monolithic capacitor and voltage regulator act as filters and stabilizers, ensuring a stable DC power output.

[0012] Preferably, in step 1, four slide rails are provided on the smooth inner wall of the cylinder to reduce the friction between the permanent magnet and the inner wall of the cylinder.

[0013] Preferably, in step 2, the energy output unit is configured with a surface-mount rectifier bridge rated at 12V and a monolithic rectifier bridge rated at 50V.

[0014] Compared with existing devices, the present invention has the following advantages:

[0015] (1) A neodymium iron boron N52 magnet with high remanence and coercivity was used to explore the optimal setting of the coil. A reciprocating structure was formed by using a magnetic spring, which has high mechanical sensitivity and energy output performance.

[0016] (2) It has a simple structure and extremely high working stability.

[0017] (3) The manufacturing process is simple and can be industrialized. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the energy harvesting unit structure of the implantable resonant generator with high energy output according to the present invention.

[0019] Figure 2 This is a physical image of the energy harvesting unit of the implantable resonant generator with high energy output according to the present invention.

[0020] Figure 3 This is a diagram illustrating the practical application of the present invention.

[0021] Figure 4 This is a diagram showing the open-circuit voltage and short-circuit current outputs of the present invention.

[0022] Figure 1 The Chinese characters are marked as follows:

[0023] 1-Cylindrical support, 2-Slide rail, 3-Cylindrical magnet, 4-Annular magnet piece, 5-Induction coil. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] A high-energy-output implantable resonant generator includes the following specific steps:

[0026] Step 1: Construction of the energy harvesting unit

[0027] A neodymium iron boron (N52) cylindrical magnet is used and magnetized along the axial direction. The permanent magnet is vertically placed inside the cylindrical device, and a magnetic disc with the same magnetism is installed below it. The cylindrical magnet is suspended inside the cylinder by the principle of like polarity repulsion. An induction coil with a wire diameter of 0.05mm is wound around the outside of the cylinder. The cylindrical support is made using 3D printing technology, with slide rails on the inner wall and a smooth outer wall.

[0028] Step 2: Construction of the energy output unit

[0029] The energy output unit consists of a surface-mount rectifier bridge, a monolithic capacitor, and a voltage regulator. The surface-mount rectifier bridge converts the AC power generated by the energy harvesting unit into DC power, while the monolithic capacitor and voltage regulator act as filters and stabilizers, ensuring a stable DC power output.

[0030] In step 1, four slide rails are installed on the smooth inner wall of the cylinder to reduce the friction between the permanent magnet and the inner wall of the cylinder.

[0031] In step 2, the energy output unit is set with a rated voltage of 12V for the surface mount rectifier bridge and 50V for the monolithic rectifier bridge.

[0032] Example 1

[0033] (1) A neodymium iron boron N52 cylindrical magnet with a height of 20mm and a diameter of 5mm was customized. A cylinder with a height of 45mm, an inner diameter of 6mm, an outer diameter of 7mm, a wall thickness of 0.5mm, and a mass of 1.5g was made by 3D printing to serve as the support structure for the energy harvesting unit.

[0034] (2) Use 0.05mm enameled wire to form a coil with a height of 20mm and 900 turns outside the cylinder.

[0035] (3) Add annular magnets with a thickness of 2mm, an outer diameter of 5mm, and an inner diameter of 2mm to both ends of the cylinder to form a magnetic spring structure.

[0036] (4) Place a cylindrical magnet inside the tube and use the repulsion of like poles to suspend the magnet inside the tube. Add a cap to the top to complete the assembly.

[0037] (5) External wires were connected and tested under a reciprocating motion device with a vibration frequency of 3Hz; the performance test results are shown in Table 1.

[0038] Example 2

[0039] (1) A N52 cylindrical magnet with a height of 15mm and a diameter of 5mm was customized. A cylinder with a height of 45mm, an inner diameter of 6mm, an outer diameter of 7mm, a wall thickness of 0.5mm, and a mass of 1.5g was made by 3D printing to serve as the support structure for the energy harvesting unit.

[0040] (2) Use 0.05mm enameled wire to form two coils with a height of 10mm and 450 turns on the outside of the cylinder. The coils are spaced 5mm apart.

[0041] (3) Add annular magnets with a thickness of 2mm, an outer diameter of 5mm, and an inner diameter of 2mm to both ends of the cylinder to form a magnetic spring structure.

[0042] (4) Place a cylindrical magnet inside the tube and use the repulsion of like poles to suspend the magnet inside the tube. Add a cap to the top to complete the assembly.

[0043] (5) The coils ② and ③ are connected in series, and the external wires of ① and ④ are connected. The test is conducted under a reciprocating motion device with a vibration frequency of 3Hz. The performance test results are shown in Table 1.

[0044] Example 3

[0045] (1) A N52 cylindrical magnet with a height of 10mm and a diameter of 5mm was customized. A cylinder with a height of 45mm, an inner diameter of 6mm, an outer diameter of 7mm, a wall thickness of 0.5mm, and a mass of 1.5g was fabricated using 3D printing to serve as the support structure for the energy harvesting unit.

[0046] (2) Use 0.05mm enameled wire to form two coils with a height of 10mm and 450 turns on the outside of the cylinder.

[0047] (3) Add annular magnets with a thickness of 2mm, an outer diameter of 5mm, and an inner diameter of 2mm to both ends of the cylinder to form a magnetic spring structure.

[0048] (4) Place a cylindrical magnet inside the tube and use the repulsion of like poles to suspend the magnet inside the tube. Add a cap to the top to complete the assembly.

[0049] (5) The coils ② and ③ are connected in series, and the external wires of ① and ④ are connected. The test is conducted under a reciprocating motion device with a vibration frequency of 3Hz. The performance test results are shown in Table 1.

[0050] Table 1. Test results of open-circuit voltage and short-circuit current of self-generating devices fabricated in different embodiments.

[0051]

[0052] As can be seen from Table 1, the design of the coil greatly affects the performance output of the device. Compared with Example 2, Example 1 changed the coil height, which led to an increase in short-circuit current and open-circuit voltage. Compared with Example 3, Example 2 only changed the magnet height and the coils were connected in reverse series. Even when worn on the human torso, this design can output an open-circuit voltage of more than 1V and a short-circuit current of 15mA when moving at a frequency of 1-2Hz.

[0053] Depend on Figure 1-4 The energy harvesting unit shown has the advantages of small size and light weight, weighing only 5.4g, accounting for 80% of the total weight of the resonant generator, making it suitable for applications in environments such as the human heart. This high-energy-output implantable resonant generator, when subjected to slight vibration, causes the permanent magnets inside the energy harvesting unit to slide towards both ends. Upon reaching the ends, they are met with the reaction force of magnetic springs, allowing the permanent magnets to reciprocate within the cylinder. During this reciprocating motion, the magnetic flux of the coil changes, generating alternating voltage and current. The unstable alternating current is processed by a surface-mount rectifier bridge, monolithic capacitors, and a voltage regulator to form direct current for direct use by the components. Figure 3 As can be seen, the energy harvesting unit is a cylinder with a height of 45mm and a diameter of 7mm, which is small in size and simple in structure. Figure 3 This demonstrates that the device is lightweight, portable, and has extremely high energy output. The energy harvested during operation can easily power 300 LEDs and 10 1W LED beads. Figure 4 As can be seen, the energy harvesting unit can stably output an open-circuit voltage of 1V and a short-circuit current of more than 15mA under 3Hz vibration.

Claims

1. An implantable resonant electric generator with high energy output, characterized in that, The implantable resonant power generation is prepared through the following specific steps: Step 1: preparation of the energy collection unit A cylindrical magnet is used and magnetized in the axial direction; The permanent magnet is vertically placed inside the cylindrical device, and a magnetic circular plate with the same magnetism is added below; The cylindrical magnet is suspended in the cylinder by using the principle of repulsion between same poles, and an induction coil is wound outside the cylinder; The cylindrical support body is made of 3D printing, Four slide rails are arranged on the inner wall of the cylinder, and the outer wall is smooth; Step 2: preparation of the energy output unit The energy output unit is composed of a patch rectifier bridge, a single stone capacitor and a voltage stabilizer. The patch rectifier bridge converts the alternating current generated by the energy collection unit into direct current. The single stone capacitor and the voltage stabilizer serve as a filter and voltage stabilizer, respectively, to ensure stable output of direct current.

2. The high energy output, implantable resonant electric generator of claim 1, wherein, In step 1, the cylindrical magnet is made of neodymium iron boron N52, with a diameter of 5 mm and a height of 15 mm, and is magnetized in the axial direction.

3. The high energy output implantable resonant electric generator of claim 1, wherein, In step 1, a ring-shaped magnet piece with a thickness of 2 mm, an outer diameter of 5 mm and an inner diameter of 2 mm is added below the cylindrical magnet to form a magnetic spring structure.

4. The high energy output implantable resonant electric generator of claim 1, wherein, In step 1, the induction coil is made of enameled copper wire with a diameter of 0.05 mm. Two coils with a width of 10 mm and 450 turns are wound in the middle of the cylinder. The entry joints of the two coils are marked as ① and ③, respectively, and the exit joints are marked as ② and ④, respectively. The coils are spaced 5 mm apart, and the line connection is connected in series from ① to ③ and externally connected from ② to ④.

5. The high energy output, implantable resonant electric generator of claim 1, wherein, In step 1, the cylinder has a diameter of 7 mm, a wall thickness of 0.5 mm, a height of 45 mm and a mass of 1.5 g.

6. The high energy output, implantable resonant electric generator of claim 1, wherein, In step 2, the energy output unit is composed of a patch rectifier bridge, a single stone capacitor and a voltage stabilizer. The alternating current generated by the energy collection unit is first converted into direct current by the patch rectifier bridge, then filtered by the single stone capacitor to output smooth voltage, and finally stabilized by the voltage stabilizer to ensure that the load obtains stable and smooth direct current. The rated voltage of the patch rectifier bridge used is 12 V, and the rated voltage of the single stone capacitor is 50 V.

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