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cklwanfifa

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[交流] 求大牛开导，为什么NASA的电池循环容量数据有跃升现象已有3人参与

最近在分析NASA的电池数据，发现随着循环电池容量并不是单调下降的，而是在一些点会有跃升现象。求大牛开导一下这样的原因和机理！

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1楼 2017-01-18 10:01:28

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cklwanfifa

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6楼: Originally posted by cxhou at 2017-01-18 15:27:55
测试流程清楚吗？个人觉得是测试流程改变比如电流和电压大小引起的。

Data Description:
A set of four Li-ion batteries (# 25, 26, 27 and 28) were run through 3 different operational profiles (charge, discharge and impedance) at room temperature (24 deg C). Charging was carried out in a constant current (CC) mode at 1.5A until the battery voltage reached 4.2V and then continued in a constant voltage (CV) mode until the charge current dropped to 20mA. Discharge was carried out using a 0.05Hz square wave loading profile of 4A amplitude and 50% duty cycle until the battery voltage fell to 2.0V, 2.2V, 2.5V and 2.7V for batteries 25, 26, 27 and 28 respectively. Impedance measurement was carried out through an electrochemical impedance spectroscopy (EIS) frequency sweep from 0.1Hz to 5kHz.

这是数据的描述