Research On Key Technologies Of Flexible Micro System Based On Micro Energy Collection

With the rapid development of the Internet of Things era,triboelectric nanogenerator(TENG),as a new type of energy harvesting device,can collect irregular mechanical motion energy and convert it into electrical energy.It is a modern,environmentally friendly,and long-term power generation system.It is extremely important for the future energy supply mode.However,since TENG is a capacitive energy harvesting device,directly supplying electricity to electronic equipment has a very low energy conversion efficiency,and an energy management module is required to improve the energy conversion efficiency of TENG.However,traditional energy management modules are often large in size,or use rigid substrates,or need to be matched with a specific TENG,which is not conducive to the integration of TENG and electronic equipment.Therefore,a micro-system that can directly capture mechanical energy and efficiently power electronic equipment is of great research value.This paper proposes and verifies a triboelectric nanogenerator that can collect omnidirectional sliding energy(OS-TENG),which solves the curve of the traditional sliding TENG sliding in a fixed direction to obtain the maximum output,and designs a step-down conversion strategy The flexible power management module(FPMM)integrates the OS-TENG and FPMM on the same flexible substrate to become a flexible direct power supply micro-system.The following is the core research work of this paper:A dielectric-dielectric grid structure triboelectric nanogenerator(GF-TENG)was developed based on the basic concept of the free-standing triboelectric nanogenerator(FTENG),and a symmetric comb was designed based on the GF-TENG The structured triboelectric nanogenerator(OS-TNNG)realizes omnidirectional sliding energy collection.To test their output performance,the basic concepts of the two TENGs are investigated and experimentally tested.Aiming at the basic characteristics of TENG’s high voltage,low current,and high output impedance,a flexible power management circuit module(FPMM)based on a stepdown conversion strategy is designed to transfer energy at the maximum point of TENG voltage through peak detection and switch control to achieve maximum energy output.Comparing FPMM with standard circuit charging,it verifies its high-efficiency energy conversion efficiency,and FPMM has the flexibility and miniaturization characteristics,as well as being simple to integrate with wearable electronic devices.By integrating OSTENG and FPMM on the same flexible substrate,the energy harvesting module and the energy management module are integrated as a whole to realize a flexible direct power supply micro-system,which can directly provide usable DC power for electronic devices.In addition,the system was used to design a self-powered wireless keyboard,and a demonstration was given.The system has been confirmed to have excellent direct power supply capabilities as well as a wide range of application scenarios.This paper is based on the research of the key technology of the flexible micro system of micro energy harvesting,which realizes the integration of energy harvesting and energy management,and realizes the integration of TENG and FPMM in integration,and directly provides electrical energy for electronic devices.In the future,wearable electronic devices has great application potential in the field.