Self-charging energy system diagram
In recent years, portable wearable electronic devices have been used on a large scale and are being miniaturized, intelligentized, multifunctional, and flexible.However, the main problem that wearable electronic products face is that the existing batteries are not enough to sustain them In order to solve this problem, in addition to increasing the energy density of the storage battery, another possible solution is to integrate the energy conversion and storage device into a self-charging energy system (Self -charging Power Systems, SCPS), which allows the collected energy to be stored in real time and to achieve a sustainable power supply, this program has aroused widespread concern in academia and in-depth research.Researchers have successfully developed a variety of energy harvesting devices Including TERN, PENG, solar cells and thermoelectric generators, etc. These energy harvesting devices can be integrated with energy storage devices (batteries, supercapacitors) and further integrated into flexible, In wearable electronic devices, the energy consumption of electronic devices is compensated in real time, and even energy self-sufficiency is achieved.
Recently, Pu Xiong and Hu Weiguo, researchers at Beijing Institute of Nano-Energy and Systems, Chinese Academy of Sciences, and Wang Zhonglin, academician of Chinese Academy of Sciences, reviewed the development status of self-charging energy systems and summarized the reported self-charging energy systems including TENG, PENG, Batteries, energy conversion devices such as thermoelectric devices and energy storage devices such as batteries and capacitors), discuss how these systems are integrated at different levels of materials, electrodes and devices, and focus on the self-charging of wearable flexible electronic devices Integrated Systems The paper discusses the importance of power management systems in self-charging energy systems and the progress made so far.
In addition, the paper summarizes the progress and problems in this field.Marine progress: Proposed a variety of energy integration system prototypes, such as SCPS based on PENG, TENG and solar cells; SCPS to collect different energy has its own unique advantages; SCPS There are many potential applications such as flexible / wearable electronics, personal healthcare, motion monitoring, self-powered sensors, the Internet of Things, etc. Main Issues: Most SCPS are still in the proof of concept phase; each integrated unit in SCPS is less efficient; The overall system efficiency of the SCPS needs to be improved; the choice of a suitable storage battery or capacitor system is crucial; the mechanisms of several SCPS are not fully understood.
Relevant research published in small.
