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중대형 전기 상용차 배터리의 주행중 충방전 특성 분석

Analysis of Charge and Discharge Characteristics of Heavy Duty Electric Commercial Vehicle Batteries

  • 송진근 (경북대학교 자동차공학부) ;
  • 차준표 (한국교통대학교 자동차공학과)
  • Song, Jingeun (School of Automotive Engineering, Kyungpook National University) ;
  • Cha, Junepyo (Department of Automotive Engineering, Korea National University of Transportation)
  • 투고 : 2021.10.26
  • 심사 : 2021.11.16
  • 발행 : 2021.11.30

초록

These days, sales of battery electric vehicles have been rapidly increasing due to the strict CO2 regulations. However, since it take too long to measure the energy economy of electric vehicles, it has been required to improve the procedure of energy economy measurement. In order to improve this problem, the present study analyzed the battery charge/discharge pattern according to the changes in battery SOC (state of charge). In general, the energy economy test is started with a battery SOC charged to 100 %. However, it was identified that when the battery is fully charged, it can actually be charged over the 100 % (e.g., 100.5 %). This can induce errors in the energy economy measurement. Therefore, the present study recommend to start the test at SOC 99.9 %. The regenerative braking was partly restricted for the SOC over 90 %. This made it difficult to estimate the overall energy economy of the electric vehicle. However, it was identified that there was no change in the battery charge/discharge characteristics under the SOC 90 %. Therefore, the energy economy test can be shortened by predicting the overall energy economy through a short mileage test.

키워드

과제정보

본 연구는 2021년 한국교통대학교의 지원을 받아 수행하였음

참고문헌

  1. 국가표준인증 표준번호 KS R 1135 전기 자동차 에너지 소비율 및 일 충전 주행거리 시험 방법
  2. J. Lim, H. Lee, C. Kim, Y. Sin, and Y. Park, "A Study of Energy Consumption Test Method for Electric Vehicles, The Korean Society of Automotive Engineers, 2629-2639, 2011.
  3. J. Kim, J. Jung, and K. Rho, "Validity Study on Revision of Constant Speed Cycle on Electric Vehicle Energy Efficiency Test Procedure in Korea, The Korean Society of Automotive Engineers, 839-843, 2020.