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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Performance Estimation Based on 4D Lookup Table Interpolating and Unit Cell Discharge Tests for Thermal Battery

4D Lookup Table Interpolating을 이용한 단위 전지 방전 시험 기반 열전지 성능 예측

  • Park, Byeong June (The 4th R&D Institute, Agency for Defense Development) ;
  • Kim, Ji Youn (The 4th R&D Institute, Agency for Defense Development) ;
  • Ha, Sang Hyeon (The 4th R&D Institute, Agency for Defense Development) ;
  • Cho, Jang Hyeon (The 4th R&D Institute, Agency for Defense Development)
  • 박병준 (국방과학연구소 4기술연구본부 4부) ;
  • 김지연 (국방과학연구소 4기술연구본부 4부) ;
  • 하상현 (국방과학연구소 4기술연구본부 4부) ;
  • 조장현 (국방과학연구소 4기술연구본부 4부)
  • Received : 2017.01.04
  • Accepted : 2017.04.10
  • Published : 2017.06.01
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Abstract

For comparison to the Li-ion battery, evaluating a thermal battery must consider additional variables. The first one is the temperature difference between the battery and its unit cell. Thermal batteries and their unit cells have a temperature difference that is caused by the thermal battery activation mechanism and its shape. The second variable is the electrochemical reaction steps. Most Li-ion batteries have a constant electrochemical reaction at the electrode, and battery voltage is affected when the concentration of Li ions is changed. However, a thermal battery has several steps in its electrochemical reaction, and each step has a different potential. In this study, we used unit cell discharge tests based on interpolating a 4D lookup table to estimate the performance of a thermal battery. From the test results, we derived an estimation algorithm by interpolating the table, which is queried from specified profile groups. As a result, we found less than a 5 percent difference between estimation and experiment at the 1.3 V cut-off time.

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References

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