Implantable wireless charging system
Patent Information
- Application Number
- PCT/CN2025/112045
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-24
- Filing Date
- 2025-08-01
- Publication Date
- 2026-10-01
Smart Images
Figure CN2025112045_01102026_PF_FP_ABST
Abstract
Description
An implantable wireless charging system Technical Field
[0001] This application relates to the field of medical device technology, and in particular to an implantable wireless charging system. Background Technology
[0002] With the development of brain-computer interface technology and the improvement of medical standards, active implantable devices are gradually being widely used in the medical field.
[0003] Active implantable devices require battery power, but existing implantable medical devices generally use disposable batteries with limited lifespans. Once the battery is depleted, a second surgery is needed to replace it, which is not only cumbersome but also increases patient suffering and medical risks. Traditional rechargeable products, on the other hand, generate eddy currents during charging, causing excessively high temperatures at the implantation site, which may also pose a risk to the patient.
[0004] Therefore, there is an urgent need for a charging product that provides wireless charging functionality for implantable medical devices to improve charging safety. Summary of the Invention
[0005] In view of the above problems, this application provides an implantable wireless charging system that provides wireless charging functionality for active implantable devices and improves charging safety.
[0006] In a first aspect, this application provides an implantable wireless charging system, the system comprising an internal part and an external part, the external part comprising an external charger and an inverter, and the internal part comprising a secondary coil and an internal power source, wherein the system is used for:
[0007] The power current from the external charger induces an alternating magnetic field in the primary coil of the inverter.
[0008] Based on the magnetic field coupling effect of the alternating magnetic field, electromagnetic induction is performed on the secondary coil to generate an induced current;
[0009] Based on the induced current, the internal power source of the internal body is powered.
[0010] Optionally, the external part further includes a twisted-pair shielded cable for connecting the external charger and the inverter. The internal part further includes an internal circuit board. In this case, the external charger is also used to transmit control signals to the inverter via the twisted-pair shielded cable in response to the placement operation and power-on operation of the inverter.
[0011] The inverter is also used to convert the power current transmitted by the twisted-pair shielded wire into alternating current based on the control signal; and to generate an alternating magnetic field through the primary coil in the inverter based on the alternating current.
[0012] The secondary coil is also used to generate an induced current based on the coupling effect of the alternating magnetic field, and to transmit the induced current to the internal circuit board.
[0013] The internal circuit board is used to convert the induced current into direct current through a rectifier module and to wirelessly charge the internal power source.
[0014] Optionally, the internal part also includes a temperature and humidity sensor for detecting the internal temperature and humidity of the target object and the internal charging current value, and for cutting off power when the internal temperature of the target object exceeds a preset temperature threshold.
[0015] Optionally, if the inverter further includes a driver, a transistor, and a resonant circuit, then the inverter is also used for:
[0016] Based on the control signal and the driver, the transistor is driven to convert the power supply current into alternating current;
[0017] The resonant circuit, combined with the alternating current, generates a high-frequency voltage to cause the primary coil to produce an alternating magnetic field.
[0018] Optionally, the external charger further includes a power management module for:
[0019] When the power supply voltage of the external charger is lower than a preset voltage threshold, a power-off process is performed.
[0020] Optionally, the power management module is further configured to:
[0021] The power supply voltage is regulated, and the regulated power supply voltage is divided to obtain three output voltages;
[0022] The first output voltage is transmitted to the inverter auxiliary power module;
[0023] The second output voltage is boosted, and the boosted second output voltage is transmitted to the inverter main power module;
[0024] The third output voltage is stepped down, and the stepped-down third output voltage is used to power the main control chip of the external charger.
[0025] Optionally, the in-body circuit board is also used for:
[0026] The induced current is converted into direct current by the rectifier module.
[0027] The DC power is regulated, and the regulated DC power is used to wirelessly charge the internal power source.
[0028] The additional voltage is divided into a first additional voltage and a second additional voltage; the first additional voltage is used to power the main control chip of the internal circuit board, and the second additional voltage is used to power the subsequent circuits.
[0029] Optionally, the in vivo portion also includes ferrite for controlling the propagation of electromagnetic waves to avoid interfering with related electronic equipment.
[0030] The beneficial effects of this invention are as follows:
[0031] This application provides an implantable wireless charging system, comprising an internal part and an external part. The external part includes an external charger and an inverter, while the internal part includes a secondary coil and an internal power source. Thus, the implantable wireless charging system of this application uses the power current from the external charger to electromagnetically induce an alternating magnetic field in the primary coil of the inverter. Through the magnetic coupling of this alternating magnetic field, the secondary coil is electromagnetically induced, generating an induced current. This induced current then supplies power to the internal power source in the internal part, thereby providing wireless charging functionality for active implantable devices and improving charging safety. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0033] Figure 1 is a schematic diagram of the external part of an implantable wireless charging system provided in an embodiment of this application;
[0034] Figure 2 is a schematic diagram of the internal structure of an implantable wireless charging system provided in an embodiment of this application;
[0035] Figure 3 shows a schematic diagram of a primary-side coil provided in an embodiment of this application;
[0036] Figure 4 shows a schematic diagram of a secondary coil provided in an embodiment of this application;
[0037] Figure 5 is a schematic diagram of a system charging principle provided in an embodiment of this application;
[0038] Figure 6 is a schematic diagram of the circuit board structure of an external charger provided in an embodiment of this application;
[0039] Figure 7 is a schematic diagram of an inverter circuit board provided in an embodiment of this application;
[0040] Figure 8 is a front view of an in-body circuit board provided in an embodiment of this application;
[0041] Figure 9 is a schematic diagram of the back structure of an in-body circuit board provided in an embodiment of this application. Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.
[0043] The terms "first" and "second" in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive protection. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The term "multiple" in this application can mean at least two, for example, two, three, or more, and this application does not impose limitations.
[0044] The term "and / or" in the embodiments of this application is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0045] It is understood that the following specific embodiments of this application involve medical-related data. When the various embodiments of this application are applied to specific products or technologies, relevant licenses or consents are required, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, relevant volunteers can be recruited and agreements can be signed to authorize their data, thereby enabling the implementation using the data of these volunteers; alternatively, implementation can be carried out within an authorized organization, using data from members of the organization to implement the following implementation methods for data management; or, in specific implementations, the relevant data used are all simulated data, such as simulated data generated in a virtual scene.
[0046] The design concept of the embodiments of this application will be briefly introduced below.
[0047] With the development of brain-computer interface technology and the improvement of medical standards, active implantable devices are gradually being widely used in the medical field.
[0048] However, active implantable devices require battery power. Existing implantable medical devices generally use disposable batteries, which have limited lifespans. Once the battery is depleted, a second surgery is required to replace it, which is not only cumbersome but also increases patient suffering and medical risks. Traditional rechargeable products, on the other hand, generate eddy currents during charging, causing excessively high temperatures at the implantation site, which may also pose a risk to the patient.
[0049] In view of the above problems, this application provides an implantable wireless charging system. The system includes an internal part and an external part. The external part includes an external charger and an inverter, while the internal part includes a secondary coil and an internal power source. Thus, the implantable wireless charging system of this application uses the power current from the external charger to electromagnetically induce an alternating magnetic field in the primary coil of the inverter. Through the magnetic coupling effect of the alternating magnetic field, the secondary coil is electromagnetically induced, generating an induced current. This induced current then supplies power to the internal power source in the internal part, thereby providing wireless charging functionality for active implantable devices and improving charging safety.
[0050] The system provided by exemplary embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that the above application scenarios are shown only to facilitate understanding of the spirit and principles of this application, and the embodiments of this application are not limited in any way.
[0051] Referring to Figures 1 and 2, Figure 1 is a structural schematic diagram of the external portion of an implantable wireless charging system provided in an embodiment of this application, and Figure 2 is a structural schematic diagram of the internal portion of an implantable wireless charging system provided in an embodiment of this application. The implantable wireless charging system in this application includes an internal portion and an external portion, wherein the external portion may include an external charger 1, a twisted pair shielded cable 2, and an inverter 3, and the internal portion includes a secondary coil 4, an internal power supply 5, an internal circuit board 6, and a ferrite core 7.
[0052] Specifically, the implantable wireless charging system of this application embodiment can use the power current provided by the external charger 1 to electromagnetically induce the primary coil 31 in the inverter 3, generating an alternating magnetic field. Through the magnetic field coupling effect of the alternating magnetic field, electromagnetic induction is induced in the secondary coil 4, thereby generating an induced current, which then supplies power to the internal power source 5.
[0053] In one possible embodiment, Figure 3 shows a schematic diagram of a primary coil provided in an embodiment of this application, and Figure 4 shows a schematic diagram of a secondary coil provided in an embodiment of this application. In an optional implementation, the inner diameter of the primary coil can range from 5±0.5mm, the outer diameter from 50±1mm, the height from 2.2±0.2mm, and the inductance from 77±1μH. The inner diameter of the secondary coil ranges from 5±0.5mm, the outer diameter from 28±1mm, the height from 2.2±0.2mm, and the inductance from 6.9±1μH. It is worth mentioning that the structural parameters of the primary and secondary coils in this application can be flexibly set according to actual charging requirements, and this embodiment does not specifically limit them.
[0054] Specifically, referring to Figure 5, which is a schematic diagram of the charging principle of a system provided in this application embodiment, the direct current (DC) provided by the external charger in this application is converted into high-frequency alternating current (AC) by an inverter through DC / AC conversion, and drives the primary coil in the inverter to generate an alternating magnetic field. The magnetic field energy is spatially coupled to the secondary coil in the body, and rectified into direct current (AC) by AC / DC conversion. After voltage adaptation by DC / DC conversion, it is output to the battery (BAT) in the body power supply to complete charging and energy storage. In this way, each system module realizes non-contact energy transfer through the magnetic field interaction of the internal and external coils, and ensures the efficient and stable operation of the implanted device through multi-stage power conversion.
[0055] In one possible implementation, the twisted-pair shielded cable 2 of the external portion of this application can be used to connect the external charger 1 and the inverter 3. The external charger 1 can transmit control signals to the inverter 3 via the twisted-pair shielded cable 2 in response to the placement operation and power-on operation of the inverter 3.
[0056] In one possible implementation, the external charger in this application also includes an external circuit board. Referring to FIG6, which is a schematic diagram of the circuit board structure of an external charger provided in an embodiment of this application, the external circuit board 13 of the external charger 1 includes: a charging management module 131, a twisted pair shielded cable interface 132, a first filter circuit 133, a screen interface 134, a second filter circuit 135, a main control chip 136, a battery negative terminal interface 137, an inverter auxiliary power module 138, a coulomb counter 139, a battery positive terminal interface 1310, a main power switch 1311, an inverter main power module 1312, a wireless charging switch 1313, and a power management module 1314.
[0057] Specifically, in this application, the inverter 3 can be placed above the secondary coil 4 of the internal part (e.g., at a position of 0-2cm). By turning on the main power switch 1311 of the external charger 1, the screen 12 of the external charger 1 is lit up to display the charging status of the external charger 1. The power level of the battery 11 of the external charger 1 can be calculated by the coulomb counter 139. By turning on the power of the wireless charging switch 1313 in conjunction with the placement of the inverter 3, the external charger 1 can be triggered to transmit a control signal to the inverter 3 through the twisted pair shielded cable 2 to realize the subsequent wireless charging function.
[0058] Specifically, the twisted pair shielded cable interface 132 in the external charger 1 can be soldered to the twisted pair shielded cable 2 using metal tin, the screen interface 134 can be soldered to the screen 12 using metal tin, the battery positive terminal interface 1310 can be soldered to the positive terminal of the battery 11 using metal tin, and the battery negative terminal interface 137 can be soldered to the negative terminal of the battery 11 using metal tin.
[0059] In one possible implementation, the power management module 1314 in the external charger 1 is mainly used to cut off power when the power supply voltage of the external charger 1 is lower than a preset voltage threshold. In this way, the system can detect in real time whether the voltage value of the battery 11 of the external charger 1 is within a preset safe operating range (e.g., 3.0V to 4.35V), thereby setting a lower limit to prevent over-discharge and avoid battery damage, and setting an upper limit to prevent overcharging and avoid the risk of thermal runaway. It is worth mentioning that this safe operating range can be set based on the chemical characteristics of batteries such as lithium batteries, and this embodiment does not specifically limit it.
[0060] In one possible implementation, the power management module 1314 is further used to regulate the power supply voltage and divide the regulated power supply voltage to obtain three output voltages: a first output voltage, a second output voltage, and a third output voltage. The first output voltage is directly transmitted to the inverter auxiliary power module; the second output voltage is first boosted and then transmitted to the inverter main power module; the third output voltage is first bucked and then used to power the main control chip of the external charger. This enables the external charger to have flexible voltage output capabilities, accurately outputting the appropriate voltage according to the specific needs of different components, thereby ensuring that all components can operate stably under suitable voltage conditions.
[0061] Specifically, as shown in Figure 6 above, the current of the battery 11 in the external charger 1 can first be monitored by the power management module 1314 to see if the battery voltage is within the safe operating range, and then it is regulated to 5V. The 5V voltage is then divided into three paths: one path is transmitted to the auxiliary power module 138 of the inverter 3, another path is boosted to 7V and transmitted to the inverter main power module 1312 of the inverter 3, and the last path is stepped down to 3.3V to power the main control chip 136.
[0062] In one possible implementation, the inverter in this application can convert the power current transmitted through the twisted-pair shielded cable into alternating current via a control signal. This alternating current then induces electromagnetic induction in the primary coil of the inverter, generating an alternating magnetic field. The secondary coil within the inverter's internal components, through the coupling effect of the alternating magnetic field, generates an induced current, which is then transmitted to the internal circuit board to supply power to the internal power source.
[0063] In one possible implementation, as shown in Figure 1 above, the inverter 3 in this application further includes an inverter circuit board 32, which includes a driver, a transistor, and a resonant circuit. Thus, the inverter can drive the transistor to convert the power supply current into alternating current through the control signal and the driver, and generate a high-frequency voltage through the resonant circuit, thereby causing the primary coil to generate an alternating magnetic field.
[0064] Specifically, referring to Figure 7, which is a schematic diagram of an inverter circuit board provided in an embodiment of this application, the inverter circuit board includes: a first gallium nitride (GaN) driver 321, a second GaN driver 322, a GaN transistor 323, a resonant circuit 324, a primary-side coil interface 325, and a twisted-pair shielded cable interface 326. The primary-side coil interface 325 and the primary-side coil 31 can be soldered together using tin, and the twisted-pair shielded cable interface 326 and the twisted-pair shielded cable 2 can be soldered together using tin. Thus, the external circuit board 13 of the external charger 1 can transmit a 1MHz, 48% reverse wave, and 4% dead zone pulse width modulation (PWM) control signal to the twisted-pair shielded interface 326 of the inverter circuit board 32 via the twisted-pair shielded cable 2. The PWM control signal drives the GaN transistor 323 through the first GaN driver 321 and the second GaN driver 322, so that two GaN transistors 323 are turned on and two are turned off at the same time, thereby converting direct current (DC) into alternating current (AC). The resonant circuit 324 can be used for tuning, filtering, and generating power frequency high voltage to generate an alternating magnetic field in the primary coil 31 of the external part.
[0065] In one possible implementation, after the secondary coil in the body generates an induced current through the coupling effect of an alternating magnetic field, the circuit board in the body can convert the induced current transmitted by the secondary coil into direct current through a rectifier module, and wirelessly charge the power source in the body.
[0066] Specifically, Figure 8 shows a front view of the internal circuit board of an internal power supply according to an embodiment of this application, and Figure 9 shows a back view of the internal circuit board of an internal power supply according to an embodiment of this application. The front structure of the internal circuit board includes: a pre-stage protection circuit 61, a main control chip 62, a power management module 63, an output level converter 64, a temperature and humidity sensor 65, a wireless resonant circuit 66, a first secondary coil interface 67, and a second secondary coil interface 68. The first secondary coil interface 67 and the second secondary coil interface 68 can be soldered to the secondary coil 4 using tin. The back structure of the internal circuit board includes: an analog-to-digital converter (ADC) sampling circuit 69, a rectifier module 610, a battery interface 611, and a charge / discharge protection circuit 612. The battery interface 611 can be soldered to the internal power supply 5 using tin and nickel strips. The internal power source 5 can be a rechargeable lithium battery, such as a high-capacity 810mAh rechargeable lithium battery, to provide efficient and stable charging support. Other types of rechargeable power sources can also be selected according to actual scenario requirements. This application embodiment does not make specific limitations in this regard.
[0067] In one possible implementation, the internal circuit board in this application can also convert the induced current generated by the secondary coil into DC power through a rectifier module, regulate the DC power, and then use the regulated DC power to wirelessly charge the internal power source. Furthermore, the additional voltage is divided into two paths: a first additional voltage is used to power the main control chip of the internal circuit board, and a second additional voltage is used to power the subsequent circuits.
[0068] Specifically, the primary coil 31 in the internal part generates an alternating magnetic field. The primary coil 31 and the secondary coil 4 in the internal part use magnetic field coupling to transfer energy. After the current is transferred to the secondary coil 4, it is first converted from AC to DC by the rectifier module 610, and then the DC is regulated to 4.8V to linearly charge the internal power supply 5. The additional voltage is divided into two paths: one path is converted to 1.8V to power the main control chip 62, and the other path is boosted to 5V to power the subsequent stage.
[0069] In one possible implementation, the in vivo circuit board of this application further includes a temperature and humidity sensor for detecting the in vivo temperature and humidity and the in vivo charging current value of the target object, and for power-off processing after the in vivo temperature of the target object exceeds a preset temperature threshold.
[0070] Specifically, as shown in Figures 8 and 9 above, the temperature and humidity sensor 65 can detect the body's temperature and humidity in real time, and the ADC sampling circuit 69 can collect the body's charging current in real time. When the body temperature rises above the threshold, it will cut off the power to protect the patient and other target objects.
[0071] In one possible implementation, as shown in Figure 2 above, the body portion of the system in this application also includes ferrite 7, which can be used to control the propagation of electromagnetic waves to avoid interfering with related electronic equipment.
[0072] Specifically, this application establishes a three-dimensional magnetic field model using electromagnetic simulation software to analyze the influence of different magnetic excitation waveforms (such as sine waves and square waves) on the magnetic flux density distribution. It also evaluates the effects of ferrite material dimensional parameters (including thickness, shape, and arrangement) and coil winding processes (such as number of turns, diameter, and spacing) on system efficiency. Based on the simulation results, a suitable magnetic circuit design is determined, enabling the magnetic field energy to be concentrated on the target area, thereby reducing the eddy current effect on the titanium shell surface. During the testing phase, this application uses a thermocouple array to monitor the temperature distribution on the titanium shell surface in real time and combines this with a spectrum analyzer to measure the high-frequency noise signal generated by the eddy currents. By comparing the simulation results with experimental data, the design parameters are further optimized to reduce the surface temperature of the titanium shell.
[0073] Next, the system operation process of this application will be specifically described in conjunction with the implantable wireless charging system structure described in the foregoing embodiments: The inverter 3 is placed above the secondary coil 4 of the body portion (e.g., 0-2cm), and the main power switch 1311 of the external charger 1 is turned on, causing its screen 12 to light up and display the charging status and the battery 11 charge calculated by the coulomb counter 139. When the wireless charging switch 1313 of the external charger 1 is turned on, the current of the battery 11 first passes through the power management module 1314 to monitor whether the battery voltage is within the effective range and stabilize it to 5V. Then, the 5V voltage is divided into three paths: one path is transmitted to the inverter auxiliary power module 138, one path is boosted to 7V and transmitted to the inverter main power module 1312, and the last path is stepped down to 3.3V to power the main control chip 136. Meanwhile, the external circuit board 13 of the external charger transmits a 1MHz, 48% reverse wave, and 4% dead zone PWM control signal to the twisted-pair shielded interface 326 of the inverter circuit board 32 of the inverter 3 via the twisted-pair shielded cable 2. The PWM control signal drives the GaN transistor 323 through the first GaN driver 321 and the second GaN driver 322, so that two GaN transistors 323 are turned on and two are turned off at the same time, thereby converting DC power into AC power. The resonant circuit 324 performs tuning, filtering, and generates power frequency high voltage. The primary coil 31 inside the body and the secondary coil 4 outside the body use magnetic field coupling to transfer energy. At the same time, the ferrite 7 outside the body can effectively control the propagation of electromagnetic waves to avoid interference with other electronic devices. After the current is transmitted to the secondary coil 4, it can be converted from AC to DC by the rectifier module 610. Then, the DC is regulated to 4.8V to linearly charge the power supply 5 inside the body. The additional voltage is divided into two paths: one path is converted to 1.8V to power the main control chip 62, and the other path is boosted to 5V to power the subsequent stage.
[0074] For ease of description, the above sections are divided into functional units (or modules) and described separately. Of course, in implementing this application, the functions of each unit (or module) can be implemented in one or more software or hardware components. Those skilled in the art will understand that various aspects of this application can be implemented as systems, methods, or program products. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as "circuit," "module," or "system."
[0075] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.
[0076] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.
[0077] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0078] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0079] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. An implantable wireless charging system, comprising: The system includes an internal part and an external part. The external part includes an external charger and an inverter, and the internal part includes a secondary coil and an internal power supply. The system is used for: The power current from the external charger induces an alternating magnetic field in the primary coil of the inverter. Based on the magnetic field coupling effect of the alternating magnetic field, electromagnetic induction is performed on the secondary coil to generate an induced current; Based on the induced current, the internal power source of the internal body is powered.
2. The system of claim 1, wherein, The external portion also includes a twisted-pair shielded cable for connecting the external charger and the inverter, and the internal portion also includes an internal circuit board. The external charger is also used to transmit control signals to the inverter via the twisted-pair shielded cable in response to the inverter placement operation and power-on operation. The inverter is also used to convert the power current transmitted by the twisted-pair shielded wire into alternating current based on the control signal; and to generate an alternating magnetic field through the primary coil in the inverter based on the alternating current. The secondary coil is also used to generate an induced current based on the coupling effect of the alternating magnetic field, and to transmit the induced current to the internal circuit board. The internal circuit board is used to convert the induced current into direct current through a rectifier module and to wirelessly charge the internal power source.
3. The system of claim 1, wherein, The internal component also includes a temperature and humidity sensor for detecting the internal temperature and humidity of the target object and the internal charging current value, and for cutting off power when the internal temperature of the target object exceeds a preset temperature threshold.
4. The system of claim 2, wherein, The inverter also includes a driver, transistors, and a resonant circuit, and the inverter is further used for: Based on the control signal and the driver, the transistor is driven to convert the power supply current into alternating current; The resonant circuit, combined with the alternating current, generates a high-frequency voltage to cause the primary coil to produce an alternating magnetic field.
5. The system of claim 1, wherein, The external charger also includes a power management module for: When the power supply voltage of the external charger is lower than a preset voltage threshold, a power-off process is performed.
6. The system of claim 5, wherein, The power management module is also used for: The power supply voltage is regulated, and the regulated power supply voltage is divided to obtain three output voltages; The first output voltage is transmitted to the inverter auxiliary power module; The second output voltage is boosted, and the boosted second output voltage is transmitted to the inverter main power module; The third output voltage is stepped down, and the stepped-down third output voltage is used to power the main control chip of the external charger.
7. The system of claim 2, wherein, The in-body circuit board is also used for: The induced current is converted into direct current by the rectifier module. The DC power is regulated, and the regulated DC power is used to wirelessly charge the internal power source. The additional voltage is divided into a first additional voltage and a second additional voltage; the first additional voltage is used to power the main control chip of the internal circuit board, and the second additional voltage is used to power the subsequent circuits.
8. The system of claim 1, wherein, The internal component also includes ferrite, used to control the propagation of electromagnetic waves to avoid interfering with related electronic equipment.