한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제32권3호
  • /
  • Pages.256-261
  • /
  • 2019
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  • 1226-7945(pISSN)
  • /
  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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신규 보호회로 적용을 통한 저전류 장비용 군 리튬전지 안전성 개선

Safety Improvement of Military Primary Lithium Batteries by New Protection Circuit for Low Current System

  • 윤성기 (국방기술품질원 지휘정찰센터) ;
  • 조유습 (국방기술품질원 지휘정찰센터)
  • Youn, Seong Gi (C4I System Center, Defence Agency for Technology and Quality) ;
  • Cho, Yu Seup (C4I System Center, Defence Agency for Technology and Quality)
  • 투고 : 2019.03.18
  • 심사 : 2019.04.09
  • 발행 : 2019.05.01
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초록

The use of military lithium batteries in this field accelerates the generation of internal pressure because the active materials, lithium and the electrolyte, react to form sulfur dioxide gas. This also reduces the amount of electrolyte. In this condition, batteries can 'vent' or 'explode' especially when completely discharged. Such venting and explosion can be regarded as a safety accident, as toxic gases and shrapnel are ejected from the batteries which can harm the user. A DTaQ was carried out in 2017 as a quality problem solution project to solve this safety issue. A protection circuit was thereby developed, which included a micro controller unit (MCU) which can stop battery usage when in an over-discharging state by sensing its low-voltage condition. In 2018, this concept was expanded to lithium batteries for the remote controlled ammunition system. This paper reports results of the improved performance.

키워드

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Fig. 1. Reaction priciple of Li/SOCl2 battery.

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Fig. 2. Discharge profile of Li/SOCl2 battery.

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Fig. 3. Explosion mechanism of Li/SOCl2 battery.

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Fig. 4. Interruption concept of new protection circuit.

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Fig. 5. New designed protection circuit for BA-6822AK.

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Fig. 6. New designed protection circuit for BA-6823AK.

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Fig. 7. Operational test of designed protection circuit for BA-6822AK/6823AK.

Table 1. Main characteristics of Li/SOCl2 battery.

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Table 2. Current usage of target system.

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Table 3. Test result of battery by korean defense standard.

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Table 5. Test result of circuit operation in the system (BA-6823AK).

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Table 4. Test result of circuit operation in the system (BA-6822AK).

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참고문헌

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  2. T. B. Reddy and D. Linden, Linden's Handbook of Batteries Fourth Edition (McGraw-Hill, New York, 2011).
  3. M. K. Lim and S. Y. Chun, J. Inst. Electronics. Info. Eng., 45, 60 (2008).
  4. J. H. Son, H. W. Shin, Y. H. Lee, G. I. Jeong, and B. S. Kim, Conference of Inst. Electronics. Info. Eng. (IEIE, Jeju, 2014).
  5. J. H. Park, G. C. Cha, W. R. Cho, and J. C. Kim, J. Inst. Illum. Electr. Install. Eng., 28, (2014).
  6. B. J. Lee, K. J. Choi, S. H. Lee, Y. M. Jeong, Y. Park, and D. W. Cho, J. Korean Inst. Commun. Inf. Sci., 42, 855 (2017). https://doi.org/10.7840/kics.2017.42.4.855
  7. J. H. Nam, Power Electronics Annual Conference (KIPE, Byunsan, 2017).