期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 161, 期 10, 页码 A1499-A1507出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0051410jes
关键词
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资金
- United States Department of Energy (CAEBAT Program) through a subcontract from EC Power
- Pennsylvania State University Materials Research Institute Nanofabrication Lab
- National Science Foundation [ECS-0335765]
Temperature is critical to the performance, durability and safety of Li-ion batteries. This paper reports in situ measurement of the radial temperature distribution inside a cylindrical Li-ion battery cell. 18650-size cylindrical cells with multiple micro thermocouples embedded are designed and manufactured. The radial temperature distribution is obtained under various operating conditions. The effects of critical parameters, such as discharge C rate, ambient temperature, and cooling condition, are investigated. It is found that higher discharge C rate and lower ambient temperature lead to higher temperature rise and larger temperature gradient within the battery cell. Stronger cooling results in smaller temperature rise but larger temperature gradient. Correlation between relative temperature gradient and cooling coefficient suggests that the assumption of uniform temperature distribution is applicable under natural-convection conditions but not applicable under strong forced convection conditions. The present results provide valuable experimental data that can be readily used to validate electrochemical-thermal coupled (ECT) battery models. (C) 2014 The Electrochemical Society. All rights reserved.
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