摘要
为准确、高效地测定电解液的残余量,建立一种软包装锂离子电池中电解液含量测试的方法。该方法为电池全生命周期内电解液组分及消耗量监测研究提供支撑。将一定量的联苯溶液与软包装电池中的电解液混合后离心分离,采用气相色谱法测定联苯含量,密度校正后,计算电解液的含量。软包装锂离子电池中加入3.1~3.4 g的联苯溶液,在40℃下静置浸润72 h,为最佳条件,误差平均值小于3%,相对标准偏差(RSD)小于2%。
In order to accurately and efficiently determine the residual amount of electrolyte,a method is developed to measure the electrolyte content in pouch Li-ion battery.This method provides support for the monitoring of electrolyte composition and consumption throughout the entire life cycle of the battery.A specified amount of biphenyl solution is mixed with electrolyte from the pouch battery and centrifuged.The content of biphenyl is then determined using gas chromatography,the electrolyte content is calculated after density correction.The optimal condition is as follows:3.1-3.4 g of biphenyl solution is added to the pouch Li-ion battery,allowing it to stand and infiltrate at 40℃for 72 h.The average method error is less than 3%,the relative standard deviation(RSD)is below 2%.
作者
罗海英
聂如杏
郭敬
李会敏
LUO Haiying;NIE Ruxing;GUO Jing;LI Huimin(Guangzhou Tinci Materials Technology Co.,Ltd.,Guangzhou 510760,Guangdong,China)
出处
《电池》
北大核心
2025年第3期628-632,共5页
Battery Bimonthly
基金
国家重点研发计划(2022YFB2404300)。
