不同的测量方法对自放电性能数据的影响
Influence of Different Test Procedures on the Self-Discharge Performance Data
DOI: 10.12677/HJCET.2022.122010, PDF,   
作者: 刘爱芳, 牛宇岚：太原工业学院化学与化工系，山西 太原；吴晓东：中科院苏州纳米技术和纳米仿生研究院，江苏 苏州
关键词: 自放电；测量方法；开路电压；不可逆容量损失；Self-Discharge； Test Method； Open Circuit Voltage； Irreversible Capacity Loss
摘要: 自放电是衡量蓄电池性能的一个重要指标，工业上通常用蓄电池储存前后开路电压(OCV)的差值来表征自放电性能。测量方法对自放电数据结果的准确性有很大的影响。因此本文选择正规生产线上最常见的两种圆柱电池18650和26650型作为测试样品，测量了不同贮存条件下的OCV数据的差值和不可逆容量损失率(ICL)对自放电性能进行表征，测量条件的变化包括贮存天数、贮存温度和容量测量方法。结果表明，不同的储存和测试方法条件下自放电引起的电压和容量的损耗在不同电池型号之间，表现出整体较相似的规律性和趋势性，说明这些自放电统计数据的可靠性和准确性。26650电池比18650电池需要更长的储存时间获得较稳定的自放电数据。这些数据对于电动汽车的应用，特别是对电池的荷电状态(SOC)的预测有着重要的意义。
Abstract: Self-discharge is an important index of battery performance, which is usually characterized by the difference of open circuit voltage (OCV) between before and after storage in industry. Otherwise, the measurement method has a great impact on the accuracy of data results. So in this paper, the two most common types of cylindrical batteries 18650 and 26650 were chosen from formal production line as the test samples, then measured the ∆OCV data and the rate of irreversible capacity loss (ICL) under different storage conditions, including storage days, storage temperature and capacity measurement procedure. The results showed overall similar regularity and tendency of the data ∆OCV and capacity loss caused by self-discharge between batteries type, under different storage and test conditions. therefore, the type 26650 cell needs more storage time or higher storage temperature to obtain more stable self-discharge data than the type 18650 cell. The data would be make great contribution for application in electric vehicle, especially for predicting the state of charge (SOC).
文章引用：刘爱芳, 吴晓东, 牛宇岚. 不同的测量方法对自放电性能数据的影响[J]. 化学工程与技术, 2022, 12(2): 68-73. https://doi.org/10.12677/HJCET.2022.122010

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