Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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A Study of Power Source for Wireless Sensor Node Using Supercapacitors

슈퍼커패시터를 이용한 무선센서노드의 전원에 관한 연구

  • Kim, Hyung-Pyo (Department of Electrical Engineering, Kyungpook National University) ;
  • Kim, Jin-Gyu (Department of Electrical Engineering, Kyungpook National University)
  • Received : 2012.06.18
  • Accepted : 2012.09.03
  • Published : 2012.09.30
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Abstract

This paper presents the power source of wireless sensor node (WSN) using supercapacitors and a solar cell. Supercapacitors have high lifetime cycling compared to that of batteries. Supercapacitors are connected in series to achieve higher voltage and a voltage balancing circuit is required to ensure that no individual cell goes overvoltage. We employ an active balancing circuit that draws minimal current by using transistors. A diode is connected in series with each supercapacitor. A new balancing circuit that equalize the cells-voltage reduces energy consumption of supercapacitors. Voltage of operating WSN is applied 2.2-3.3V by DC/DC converter and supercapacitor voltage 2.2-5.1V. Maximum operating time of wireless sensor node is about 16 hours in full charging.

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References

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