A Highly Efficient Auto-Polarity Energy Harvesting Circuit Based on Reconfigurable TEG Array for Wearable Applications

Zihao Fan1; Yunhao Li1; Qiping Wan2; Su Yang3; Xiaoming Tao3; Yuan Gao1

10.1109/ISCAS46773.2023.10181446

2023

IEEE International Symposium on Circuits and Systems (ISCAS)

0271-4302

978-1-6654-5110-9

2023 IEEE International Symposium on Circuits and Systems (ISCAS)

2023-May

1-4

21-25 May 2023

Monterey, CA, USA

This paper presents an auto-polarity thermo-electric energy harvesting circuit based on the reconfigurable thermoelectric generator (TEG) array. The auto-polarity function is achieved by simply altering the operating mode of the inverse current detector without adding extra power overhead and hardware cost. In addition, the proposed circuit consists of the TEG array and switches, removing the need for bulky inductor-based or switched-capacitor DC-DC converters. Hill-climbing algorithm is used for maximum power point tracking (MPPT). The operating frequency of the system is 0.2 Hz with overall dynamic power consumption of only 1.2mW. Over a wide range of temperature gradients, the static power is less than $0.1\mu \mathrm{W}$ with a peak efficiency of 99.6%.

Energy Harvesting (EH) Thermoelectric Generator (TEG) Reconfigurable Switch Array Auto-polarity Controller Maximum Power Point Tracking (MPPT)

第一 ; 通讯

CPCI-S ; EI

WOS:001038214600087

20233314552196

DC-DC converters ; Maximum power point trackers ; Reconfigurable hardware ; Thermoelectric equipment ; Timing circuits ; Wearable technology

Energy Conversion Issues:525.5 ; Thermoelectric Energy:615.4 ; Electric Components:704.1 ; Electric Equipment:704.2 ; Pulse Circuits:713.4 ; Computer Circuits:721.3

IEEE

1.School of Microelectronics, Southern University of Science and Technology, Shenzhen, China
2.Analog Devices Inc., San Jose, CA, USA
3.Research Institute for Intelligent Wearable Systems, Hong Kong Polytechnic University, Hong Kong, China

Zihao Fan,Yunhao Li,Qiping Wan,et al. A Highly Efficient Auto-Polarity Energy Harvesting Circuit Based on Reconfigurable TEG Array for Wearable Applications[C],2023:1-4.