基于时频分析的锂离子电池阻抗计算方法OA北大核心CSCDCSTPCD
Measuring method of Li-ion battery impedance based on time-frequency analysis
将小波理论应用到电池阻抗的计算中,利用50 s的放电电流,计算出电池在0.031 6～794.328 2 Hz频率的阻抗,同时研究放电电流对结果的影响.在较小的放电电流下,计算得到的电池阻抗低频部分有很好的精度,而高频会受到信噪比的影响;增大放电电流会提升信噪比,可提高中高频阻抗部分的精度,但是由于电池内部的非线性,会导致低频部分阻抗有偏差.以中高频阻抗为研究对象,发现电池处于相同荷电态(SOC)和温度下,中高频段阻抗基本不受输出电流大小的影响.…查看全部>>
The wavelet theory was applied to the calculation of the battery impedance.The impedance at the frequency of 0.031 6 -794.328 2 Hz of the battery could be calculated under 50 s discharge process.At the same time,the effects of different discharge currents on the results were studied.It was found that the low-frequency part of the battery impedance calculated was kept in good accordance with electrochemical impedance spectroscopy(EIS),but the high frequency w…查看全部>>
张珺涵;王学远;魏学哲
同济大学汽车学院,上海201804同济大学汽车学院,上海201804同济大学汽车学院,上海201804
信息技术与安全科学
锂离子电池电化学阻抗谱(EIS)阻抗测量小波变换
Li-ion batteryelectrochemical impedance spectroscopy(EIS)impedance measurementwavelet transform
《电池》 2018 (1)
锂离子动力电池低温交流激励产热机理与加热方法研究
8-12,5
国家自然科学基金(51576142)
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