Transcutaneous wireless charging device with frequency and amplitude modulation function for implantable medical instruments

Abstract

The invention provides a percutaneous wireless charging device with a frequency modulation and amplitude modulation function applied to an implantation type medical instrument. A flat coil with an internally implanted coaxial magnetic core is utilized in vitro, and a hollow coil is utilized in vivo, so that the charging of the implantation type medical instrument from the vitro to the vivo is realized, the control on the optimal working point of a system is realized by modulating emission frequency and amplitude in a closed-loop control manner, the influence of too high temperature of an vivo implantation type medical instrument on the human body caused by low charging efficiency is prevented, and meanwhile the vitro charger can ensure that the heat does not exceed a danger threshold of the human body through a circuit design.

Description

technical field [0001] The invention relates to a percutaneous wireless charging device with frequency and amplitude modulation functions for implantable medical instruments, belonging to the technical field of implantable medical instruments. Background technique [0002] There are various types of implantable medical instruments and a wide range of applications. Most of the implantable medical products currently on the market are powered by lithium primary batteries with high energy density, and most of them have a short lifespan. In recent years, with the development of wireless technology and lithium rechargeable battery technology, the development of rechargeable implantable medical devices with longer lifespan has become the mainstream trend of future development. [0003] Implantable medical instruments are implanted in the patient's body, and there is skin and other tissue isolation between the external charging device, and a percutaneous wireless charging method is ...

AI Technical Summary

Problems solved by technology

However, in the above solutions, the alignment adjustment speed is limited by the wireless communication cycle of the internal and external devices, and there is a problem of slow adjustment response speed. At the same time, additional sensor modules or heat dissipation modules will bring about complex system hardware structures.

In addition, different alignment positions and different charging stages of implantable medical devices in the body will lead to different optimal operating points and charging efficiencies of the percutaneous wireless charging device, which will lead to different heating of the device in the body.

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