Design And Experimental Research Of Charging Circuit And Information System Of Wireless Electrical Power Transmission System For Implantable Device

Implantable device is an electronic device embedded in the organism or the human body, itcan be used to replace or compensate the function of human organs, it can also measure thechange of the physiological, biochemical and physico-chemical parameters of lives as well asdiagnose and treat certain diseases.Implantable device technology is maturing, the type of implanted devices is also increasing,but it always faces with the crucial question: it is limited by implanted space constraints, how togive implanted device long-term stable supply energy is important.Traditional implanted electronic devices are battery-powered, this kind of built-innon-recyclable lithium battery can only provide the energy for the stable system for3-5years,once the energy is depleted, the only way to replace battery is do a other surgery, which, on theone hand has certain risk, on the other hand also add to the economic burden of the patients.In order to overcome the shortcoming of the traditional implanted devices, this paperstudies the wireless power transmission of implanted devices system based on the Magneticcoupling resonance technology.This technology has the advantages of high efficiency transmission and long distanttransmission; it can applicable to the field of medical implant devices. This paper has anoptimization design of the resonance coil based on the study, and finished the following chargingcircuit design as well as the monitor of the battery temperature during charging. The main workis as follows:1.This paper analyses the mechanism and transmission status of wireless energytransmission system according to theoretical analysis of the coupled mode theories, analysis ofthe formula derivation and other means.2.In order to achieve the ultimate purpose of the implanted, this paper designed a smallerresonant coil and did some experimental study of the transmission band, output power and outputefficiency through the analysis of the precious the study research.3.This paper designed wireless charging solutions based on magnetically coupled resonantwireless power transmission method for implantable devices, mainly including high frequency power amplifier, high frequency rectifying filter and the design of lithium battery chargingcircuit, simulate and experiment each part of the system.4.This paper designed a wireless information transmission system based on MSP430MCUfor implantable devices, and achieved wireless monitoring of the battery temperature.The new method of wireless charging of lithium battery of implanted devices is based onmagnetically coupled resonance technology, it will solve the endurance problem of implanteddevice energy, and has profound significance and broad application prospects.