A subcutaneously implantable microelectrode wireless charging system

Abstract

The utility model belongs to the field of biomedical engineering, concretely relates to a subcutaneous implantable micro -electrode wireless charging system, including in -vivo part and extracorporeal part, in -vivo part includes flexible bio -electrode array, miniature control unit, power supply unit three integrated interconnection package structure, still includes communication module and temperature sensor module, extracorporeal part includes wireless charging patch, intelligent control terminal, and the wireless charging patch inside integrated has high -frequency transmitting coil, adaptive impedance matching network and power supply device, power supply unit inside integrated has miniature planar spiral coil, rectifier, super energy storage capacitor and voltage stabilizing circuit, and miniature planar spiral coil is coupled with high -frequency transmitting coil and charges, and super energy storage capacitor is used for storing the charged energy, and miniature control unit and intelligent control terminal are connected between communication. The device provided by the utility model can satisfy long -term implantation demand, guarantees the accuracy of the biological signal gathered simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of biomedical engineering, specifically relating to a subcutaneous implantable microelectrode wireless charging system. Background Technology

[0002] With the joint development of modern materials science, high-performance, low-power integrated circuits, and software technologies such as embedded microcontrollers, embedded systems, and operating systems, various implantable medical technologies have emerged. This type of implantable medical technology only requires implanting a chip into the body, which is more convenient, faster, more accurate, and cost-effective in monitoring various health data and repairing human functions.

[0003] However, implantable medical devices still face numerous challenges in terms of miniaturization, biocompatibility, and energy consumption. Typically, implanted devices or systems require different replacement and upgrade strategies depending on the battery technology used. Even the most durable implants generally require battery replacement every 2-3 years. Frequent battery replacements necessitate multiple surgeries, which is both economically and physically unbearable for patients. Therefore, designing a corresponding charging system could significantly extend the lifespan of implantable medical devices within the patient's body, reducing the pain and suffering caused by multiple surgeries. Furthermore, some implantable medical devices transmit energy and signals simultaneously via transmitting and receiving coils, making the transmitted signals highly susceptible to load variations and resulting in low accuracy. Utility Model Content

[0004] To address the issues mentioned in the background section regarding the frequent battery replacements required for implantable medical devices or the inaccuracy of signal transmission due to the use of dual coils for simultaneous energy and signal transmission in existing technologies, this invention provides a subcutaneous implantable microelectrode wireless charging system, the technical solution of which is as follows:

[0005] A subcutaneous implantable microelectrode wireless charging system includes an in vivo part and an external part. The in vivo part includes a flexible bioelectrode array, a micro control unit, and a power supply unit, which are integrated and interconnected in a packaged structure. The packaged material is a Parylene-C coating, and the packaged structure covers all parts except the electrode contacts. The external part includes a wireless charging patch and an intelligent control terminal.

[0006] The power supply unit is located on the back of the flexible bioelectrode array substrate and includes a micro planar spiral coil, a rectifier, a super energy storage capacitor and a voltage regulator circuit. The wireless charging patch integrates a high-frequency transmitting coil, an impedance matching circuit and an AC power supply. During charging, the micro planar spiral coil is coupled with the high-frequency transmitting coil.

[0007] Communication connection between the micro control unit and the intelligent control terminal.

[0008] Furthermore, the outer surface of the wireless charging patch housing is coated with Parylene-C, and one side of the coating is coated with medical pressure-sensitive adhesive. The internal AC power supply is connected to both ends of the high-frequency transmitting coil through an impedance matching circuit.

[0009] Furthermore, the two ends of the miniature planar spiral coil in the power supply unit are connected to the super energy storage capacitor through a rectifier, and the super energy storage capacitor is then connected to the miniature control unit through a voltage regulator circuit.

[0010] Furthermore, the internal component also integrates a communication module and a temperature sensor module, both of which are connected to the micro control unit. The communication module includes a Bluetooth module and an NFC module.

[0011] Furthermore, the model of the micro control unit is selected as MSPMOC1104.

[0012] This solution has the following beneficial technical effects:

[0013] The implantable microelectrode wireless charging system provided by this invention comprehensively considers biocompatibility, miniaturization, energy efficiency, and safety. This solution employs flexible electronics technology and a novel energy storage scheme, achieving device miniaturization through multi-layer heterogeneous integration. It innovatively uses supercapacitors to replace traditional batteries, and, in conjunction with an adaptive wireless charging system, can meet long-term implantation needs. It can be applied to neuromodulation, such as epilepsy early warning intervention, Parkinson's disease treatment, and chronic pain management. It can also be applied to physiological monitoring, such as real-time blood glucose monitoring, myocardial electrical activity recording, and brain-computer interface applications.

[0014] This invention separates energy transmission and signal transmission into separate components. Energy transmission is achieved using a miniature planar spiral coil and a high-frequency transmitting coil. A power supply unit with an integrated super energy storage capacitor powers the micro control unit, which then transmits the biosignals collected by the flexible bioelectrode array to an external control terminal, ensuring the accuracy of the biosignals. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a flexible bioelectrode array.

[0016] Figure 2 This is a schematic diagram of the component integration plan on the back of the flexible bioelectrode array.

[0017] Figure 3 This is a schematic diagram of the electrical connections between the micro-control unit and electronic components within the body.

[0018] Figure 4 This is a schematic diagram of the internal planar structure of a wearable wireless charging patch.

[0019] Figure 5This is a schematic diagram illustrating the charging principle of the system of this utility model.

[0020] The diagram shows the following components: 1-Flexible bioelectrode array, 101-Conductor, 102-Bioelectrode substrate, 2-Micro control unit, 3-Power supply unit, 4-Wireless charging patch, 5-Micro planar spiral coil, 6-Rectifier, 7-Super energy storage capacitor, 8-Voltage regulator circuit, 9-High frequency transmitting coil, 10-Impedance matching circuit, 11-AC power supply, 12-Communication module, and 13-Temperature sensor module. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this utility model clearer, the content of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] This invention provides a subcutaneous implantable microelectrode wireless charging system, comprising an in vivo part and an external part. The in vivo part includes a flexible bioelectrode array 1, a microcontroller unit 2, and a power supply unit 3, which form an interconnected encapsulation structure. The encapsulation material is a Parylene-C coating, covering all parts except the electrode contacts. The flexible bioelectrode array 1 is used to collect biological electrical signals, the microcontroller unit 3 is used to process and transmit the biological electrical signals collected by the flexible bioelectrode array 1, and the power supply unit is used to supply power to the microcontroller unit 2.

[0023] The external part includes a wireless charging patch 4 and an intelligent control terminal. The wireless charging patch 4 is used to charge the power supply unit 3 of the internal part. The intelligent control terminal is communicatively connected to the micro control unit 3 and is used to send instructions to the micro control unit 3 and receive signals transmitted by the micro control unit 3 so that the patient can intervene and handle relevant situations in a timely manner.

[0024] like Figure 1 As shown, the flexible bioelectrode array 1 is a 16-channel microelectrode array with an impedance of <10kΩ@1kHz. It includes a conductor 101 and a bioelectrode substrate 102. The substrate material is medical-grade polyimide with a thickness of 50μm. The conductor is made of gold-iridium alloy nanowire or platinum-iridium alloy nanowire with a diameter of 50nm. The coating on the surface of the alloy nanowire is Parylene-C. The thickness of the flexible bioelectrode array 1 is <1mm.

[0025] like Figure 2 As shown, the power supply unit 3 is located on the back of the bioelectrode substrate 102 of the flexible bioelectrode array 1, and includes a micro planar spiral coil 5, a rectifier 6, a super energy storage capacitor 7, and a voltage regulator circuit 8.

[0026] The miniature planar spiral coil 5 serves as the induction receiving coil, generating alternating current without fixed polarity. At any given moment, terminal A is positive and terminal B is negative; at the next moment, terminal A will be negative and terminal B positive. The rectifier 6, composed of diodes, is connected across the induction receiving coil, and its output DC current is stored in the super-energy storage capacitor 7. The voltage regulator circuit 8 consists of an adjustment transistor and an error amplifier. The super-energy storage capacitor 7 is connected to the miniature control unit 2 through the voltage regulator circuit 8.

[0027] The internal components also integrate a communication module 12 and a temperature sensor module 13, both of which are connected to the micro control unit 2. The communication module includes a Bluetooth module and an NFC module. The temperature sensor is included to prevent skin burns caused by excessive heat during charging.

[0028] like Figure 3 As shown, the micro control unit 2 is model MSPMOC1104, the Bluetooth module is AXB033, the NFC module is PN532, and the temperature sensor module is MAX30205. The Bluetooth and NFC modules are connected to the UART serial port of the MSPMOC1104, and the temperature sensor module 13 is connected to I... 2 C, the output of voltage regulator circuit 8 is connected to the VDD pin of MSPMOC1104.

[0029] like Figure 4 As shown, the wireless charging patch 4 integrates a high-frequency transmitting coil 9, an impedance matching circuit 10, and an AC power supply 11. During charging, the miniature planar spiral coil is coupled to the two high-frequency transmitting coils 9.

[0030] The diameter of the miniature planar spiral coil 2 is set to 3mm.

[0031] The wireless charging patch 4 includes a housing, the outer surface of which is coated with Parylene-C, and one side of the coating is coated with medical pressure-sensitive adhesive.

[0032] like Figure 5 As shown, the AC power supply 11 is connected to both ends of the high-frequency transmitting coil 9 through the impedance matching circuit 10. The miniature planar spiral coil 5 is coupled with the high-frequency transmitting coil 9 to generate an induced current. The rectifier 6 converts the induced current into DC output, which is collected through the super energy storage capacitor 7 and finally supplied to the micro control unit 2 through the voltage regulator circuit 8.

[0033] All contents not described in detail in the above specification are existing technologies known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A subcutaneous implantable microelectrode wireless charging system, characterized in that: It includes an in vivo part and an in vitro part. The in vivo part includes a flexible bioelectrode array (1), a micro control unit (2) and a power supply unit (3), which are integrated and interconnected in a package structure. The package material is a Parylene-C coating, and the package covers all parts except the electrode contacts. The in vitro part includes a wireless charging patch (4) and a smart control terminal. The power supply unit (3) is located on the back of the flexible bioelectrode array (1) substrate and includes a micro planar spiral coil (5), a rectifier (6), a super energy storage capacitor (7) and a voltage regulator circuit (8). The wireless charging patch (4) integrates a high-frequency transmitting coil (9), an impedance matching circuit (10) and an AC power supply (11). During charging, the micro planar spiral coil (5) is coupled with the high-frequency transmitting coil (9). The micro control unit (2) communicates with the intelligent control terminal.

2. The subcutaneous implantable microelectrode wireless charging system according to claim 1, characterized in that: The outer surface of the wireless charging patch (4) is coated with Parylene-C, and one side of the coating is coated with medical pressure-sensitive adhesive. The internal AC power supply (11) is connected to both ends of the high-frequency transmitting coil (9) through the impedance matching circuit (10).

3. The subcutaneous implantable microelectrode wireless charging system according to claim 2, characterized in that: The two ends of the miniature planar spiral coil (5) in the power supply unit are connected to the super energy storage capacitor (7) through the rectifier (6), and the super energy storage capacitor (7) is then connected to the miniature control unit (2) through the voltage regulator circuit (8).

4. The subcutaneous implantable microelectrode wireless charging system according to claim 3, characterized in that: The internal part also integrates a communication module (12) and a temperature sensor module (13), both of which are connected to the micro control unit (2). The communication module includes a Bluetooth module and an NFC module.

5. The subcutaneous implantable microelectrode wireless charging system according to claim 4, characterized in that: The model of the micro control unit (2) is selected as MSPMOC1104.

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