功勋
电池(电)
磷酸铁锂
汽车工程
锂(药物)
锂离子电池
高效能源利用
热的
储能
核工程
热分析
绩效改进
荷电状态
电气工程
材料科学
计算机科学
工程类
光电子学
功率(物理)
物理
医学
内分泌学
气象学
量子力学
运营管理
作者
Sungyoung Song,Stig Munk-Nielsen,Vaclav Knap,Christian Uhrenfeldt
标识
DOI:10.1016/j.est.2021.103413
摘要
• A newly proposed figure of merit that can represent charging / discharging energy efficiency and thermal performance. • Temperature distribution characteristics which can affect the accuracy of state prediction and lifespan. • Structural analysis with 3D X-ray CT scanning to evaluate this performance difference related to the tab design and package inside the batteries. • Performance evaluation of lithium-ion batteries from novel perspectives. A comprehensive performance evaluation is required to find an optimal battery for the battery energy storage system. Due to the relatively less energy density of lithium iron phosphate batteries, their performance evaluation, however, has been mainly focused on the energy density so far. In this paper, a multifaceted performance evaluation of lithium iron phosphate batteries from two suppliers was carried out. A newly proposed figure of merit, that can represent charging / discharging energy efficiency and thermal performance, is proposed. The figure of merit allows designers to conveniently select a battery with a higher round-trip efficiency and require less cooling load for the battery energy storage system. Temperature distribution characteristics, which can affect the accuracy of state prediction and lifespan, have been evaluated with a high-performance infrared camera. Even though the energy density of a certain battery is relatively lower, it has been confirmed that it could show better round-trip energy efficiency and thermal performance through the evaluations. It is revealed by structural analysis with three-dimensional X-ray computed tomography scanning that this performance difference is related to the tab design and package inside the batteries. Moreover, a temperature monitoring methodology to minimize temperature measurement errors in the battery management systems is proposed. This paper is including a video file of Supplementary material that shows 3D X-ray CT scanning results.
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