Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Built-in protection circuit module by using VO2 temperature sensors

VO2 온도센서를 이용한 전원차단 PCM 구성

  • Song, K.H. (Department of Materials Science and Engineering, University of Seoul) ;
  • Choi, J.B. (Department of Materials Science and Engineering, University of Seoul) ;
  • Son, M.W. (Department of Materials Science and Engineering, University of Seoul) ;
  • Yoo, K.S. (Department of Materials Science and Engineering, University of Seoul)
  • 송건화 (서울시립대학교 신소재공학과) ;
  • 최정범 (서울시립대학교 신소재공학과) ;
  • 손명우 (서울시립대학교 신소재공학과) ;
  • 유광수 (서울시립대학교 신소재공학과)
  • Published : 2009.01.31
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Abstract

Most portable mobile devices employ rechargeable lithium-ion batteries. This lithium-ion battery usually suffers from the possibility of explosion due to heat generation from surrounding atmosphere or internal deficiency during charging or at overuse. To solve these problems, most rechargeable batteries have a built-in protection circuit module (PCM). The resistance of a properly processed $VO_2$ critical temperature sensor (CTS) is changed dramatically at a critical temperature of around $68^{\circ}C$, which can replace some bi-metal, NTC, or PTC sensors embedded in PCM. Such $VO_2$ CTS consumes a very small current at the level of natural discharge. Experimental results showed that this CTS could be applied to a PCM as the PCM could protect the battery while keeping its power consumption at minimum.

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References

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