Study on the mobile phone case for self-power generation

자가발전용 휴대폰 케이스에 관한 연구

  • Kim, Jin Ho (Division of Mechanical Engineering, Yeungnam University) ;
  • Park, Chang Hyung (Division of Mechanical Engineering, Yeungnam University) ;
  • Han, Seung Chul (Dept. of Automobiles Yeungnam College University)
  • 김진호 (영남대학교 기계공학과) ;
  • 박창형 (영남대학교 기계공학과) ;
  • 한승철 (영남이공대학교 자동차과)
  • Received : 2017.03.15
  • Accepted : 2017.06.09
  • Published : 2017.06.30


This paper presents the mobile phone case for self-power generation and recharge for emergency calls or text messages at the discharge of a battery. If the user shakes his smart phone case, the interaction of electromagnetic coil and permanent magnet in an electric generator produces electric energy, which charges the lithium-ion battery. This enables the user to give a few calls or text messages. In addition, the vibration energy from humans walking at a frequency of 2 ~ 3Hz charges the battery. The electric generator was simulated using MAXWELL, a commercial electromagnetic analysis program, to analyze the electric power generation. Finally a prototype of the mobile phone case for self-power generation was built based on the analysis and its performance was verified.


Energy harvesting;Linear generator;MAXWELL;Mobile phone case;Self-Power generation


Supported by : 영남대학교


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