分离器(采油)
热失控
材料科学
电阻抗
聚乙烯
开路电压
荷电状态
量热计(粒子物理)
电气工程
短路
热的
复合材料
核工程
锂离子电池
电压
输出阻抗
电池(电)
分析化学(期刊)
化学
工程类
热力学
物理
色谱法
探测器
功率(物理)
作者
I. Uchida,Hiroaki Ishikawa,Mohamed Mohamedi,Minoru Umeda
标识
DOI:10.1016/s0378-7753(03)00248-9
摘要
In this work, we present a set of thermal characterization experiments of charged prismatic polymer lithium-ion battery (PLB) comparatively with those of a lithium-ion battery (LIB). These cells at different state of charge (SOC) were tested inside an accelerated rate calorimeter (ARC) to determine the onset-of-thermal runaway (OTR) temperatures. In addition, the thermally activated components of these cells were followed by monitoring the impedance (at 1 kHz) and the open-circuit voltage (OCV) as a function of temperature. An increase in the impedance was observed at around 133 °C corresponding to the polyethylene separator shutdown. Above 140 °C, the OCV dropped to zero indicating an internal short-circuit due the separator meltdown suggesting that the pinholes created in the separator at meltdown are large enough to create an internal short-circuit.
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