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作者机构:Karlsruhe Inst Technol Inst Werkstoffe Elektrotech D-76131 Karlsruhe Germany Karlsruhe Inst Technol Inst Thermal Proc Engn D-76131 Karlsruhe Germany
出 版 物:《JOURNAL OF POWER SOURCES》 (电源杂志)
年 卷 期:2013年第243卷
页 面:110-117页
核心收录:
学科分类:0820[工学-石油与天然气工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程(可授工学、理学学位)] 0703[理学-化学]
主 题:Temperature Lithium-ion EIS Measurement Ohmic resistance Impedance
摘 要:Sensorless online temperature measurement of lithium-ion cells based on electrochemical impedance spectroscopy (EIS) measurements is introduced and applied to a commercial 2 Ah pouch cell. The method s sensitivity on temperature and state of charge (SOC) is investigated, taking a closer look to the selection of measurement frequency. The internal temperature is determined as precise as +/- 0.17 K with SOC status known and +/- 2.5 K with SOC status unknown at isothermal conditions. Furthermore, the influence of a temperature gradient, as it will develop during cell operation, is studied in detail and the simulation results are validated experimentally. Finally, the method s ability to monitor the temperature is demonstrated during a thermal cool down. (C) 2013 Elsevier B.V. All rights reserved.