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软包锂电池铝塑膜热封强度工艺参数研究
Study on the heat-sealing process parameters of aluminum plastic film for pouch lithium battery
投稿时间:2022-05-23  修订日期:2022-07-16
DOI:
中文关键词:  软包锂电池  铝塑膜  热封强度  响应曲面法  参数分析
英文关键词:pouch Li-ion battery  aluminum plastic film  heat-sealing strength  response surface methodology  parameter analysis
基金项目:国家自然科学基金项目(52175234, 51105175),江苏省“六大人才高峰”资助项目(JXQC-006)
作者单位邮编
王雪峰 江南大学机械工程学院 214122
纪小刚 江南大学 机械工程学院 214122
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中文摘要:
      铝塑复合膜是锂离子电池可以实现外形尺寸灵活变化的关键,其热封性能的优劣会影响到电池在使用过程中的安全。本文针对于152μm厚的PA/AL/CPP铝塑复合膜,研究了在不同热封条件(热封温度、热封时间和热封压力)下铝塑膜的热封强度,通过理论计算选取合理的参数范围,利用万能材料试验机测试了热封后铝塑膜的最大拉伸强度,并将此作为衡量热封强度大小的标准,阐述了热封强度在不同热封工艺参数下的变化规律。根据单因素试验测试结果设计正交试验,并对热封工艺参数进行显著性分析,同时通过响应曲面法拟合影响显著的参数与热封强度之间的关系,构建了热封强度关于热封温度与热封时间的数学模型。结果表明,在铝塑膜有效封合的范围内,三个热封工艺参数对铝塑膜热封强度的增加均起着正向作用,其中影响显著的参数为热封温度和热封时间。本研究得到的模型可以根据不同的要求对热封参数进行范围控制,为企业生产过程中参数的选择提供依据。
英文摘要:
      Aluminum plastic composite film is the key to achieve flexible size of Li-ion battery, and its heat-sealing performance is related to the safety in use directly. The heat-sealing strength of 152μm PA/AL/CPP al-plastic film is studied under different conditions (heat-sealing temperature, heat-sealing time and heat-sealing pressure). Reasonable parameters are selected through theoretical calculation, and the maximum tensile strength of the film is tested by universal material testing machine. The maximum tensile force of al-plastic film after heat sealing is taken as the standard to measure the heat-sealing strength. The variation of the heat-sealing strength under different heat-sealing technological parameters is described. According to the single factor test results, orthogonal test is designed to analyze the significance of the process parameters that affect the heat-sealing performance of the al-plastic film. Response surface method was used to fit the relationship between the influential parameters and the heat seal strength, and the mathematical model of heat-sealing strength on the heat-sealing temperature and the heat-sealing time is established. The result shows that the three heat-sealing parameters can enhance heat-seal strength within an effective heat-sealing range, among which heat-sealing temperature and heat-sealing time are the main factors. The model obtained in this study can be used to calculate unknown parameters, which provides a basis for the selection of parameters in the production process of enterprises.
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