用独特的微量热仪的方法来评价高能量电池A Unique Calorimeter-Cycler for Evaluating High-Power
2006-10-24 11:46
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资料摘要:
Battery thermal management is critical for high-power battery packs commonly used in electric vehicles (EV) and hybrid electric
vehicles (HEV). To design battery thermal management systems properly, obtaining accurate heat generation data from battery
modules is essential. To measure heat generation from full-size, multiple-cell battery modules, we developed and tested a custom-made
calorimeter for large modules. Battery modules with dimensions up to 21 cm x 39 cm in cross section and 20 cm in height can be
placed in the cavity of the calorimeter for measuring heat generation rates from 1 W to 100 W with the battery operating at -30(C to
+60(C. The instrument is capable of measuring heat effects as small as 10 joules with accuracy of 5%. A state-of-the-art high power
battery cycler is used to cycle the modules in the calorimeter. This paper provides a description of the calorimeter, calibration test
results on its performance, and test results from a module simulating a HEV lead-acid battery.
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用独特的微量热仪的方法来评价高能量电池A Unique Calorimeter-Cycler for Evaluating High-Power
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欧姆电阻主要由电极材料、电解液、隔膜电阻及集流体、极耳的连接等各部分零件的接触电阻组成,与电池的尺寸、结构、连接方式等有关
我们都知道欧姆电阻可以通过交流阻抗EIS方法测得,但怎样才能从EIS数据中得到准确的欧姆电阻呢?很多人认为是Nyquist图跟横轴的交点,但其实这样读到的欧姆电阻并不准确。
我们可以用分析软件做个模拟电路或者用电子元件搭建一个简单的电路进行分析。
当我们对材料做Tafel极化曲线测试时会不会有这样的疑问:
为什么极化曲线测出来的腐蚀电位跟开路电位偏差大,以至于阳极部分与阴极部分不一样宽?
Zahner Analysis分析EIS数据的拟合步骤
1.打开EIS.ism的数据
2.打开Model Editor
3.创建等效电路或打开已保存的等效电路文件
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