콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Sensitivity of power of lithium-ion batteries to temperature: A case study using cylindrical- and pouch-type cells
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-07
- 저자명 유명현,Sun Ho Park,Joonam Park,Yong Min Lee
- 학술지명 JOURNAL OF POWER SOURCES
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.jpowsour.2020.228238
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
Power measurement has become as important as capacity to ensure stable operating conditions for batteries at different temperatures, states of charge (SOCs), and states of health (SOHs). Unlike capacity, the power of a lithium-ion battery (LIB) is quite sensitive to temperature. However, there have been few systematic works on the measurement of power at different temperatures with various LIB types. Herein, the power of two types of LIB (cylindrical and pouch), which are normally used in traction applications, are measured at different temperatures (15, 25 and 35 degrees C) using the hybrid pulse power characterization (HPPC) method. When LIB reaches to each thermal equilibrium, the battery is discharged and charged for 10 s at a specific SOC by applying constant current. And then, power value could be obtained through calculating some simple equations. In normal operating conditions, capacity change little (similar to 0.47% per degrees C) regardless of temperature change, but power increase by about 3% per degrees C. Considering that each cell type has a totally different cell configuration, the similarity of this trend between LIB types is quite noticeable. Consequently, when measuring the power of LIB, the temperature must be controlled precisely, or at least calibrated if temperature differences are observed.
