摘要
研制了基于光杠杆法的汽车电池气密性在线检测系统。探索了电池内部压强大小、焊缝处漏气口方向、检测高度等参数与焊缝处压强分布的关系。设计并优化弹性机构参数,建立了检测系统的灵敏度模型,并设计光学检测系统。通过纳米定位台和带有直径75μm漏气孔的电池,对系统的性能进行测试。实验结果表明:该系统的分辨力为1μm,当电池内部压强分别为2×10^(5) Pa、3×10^(5) Pa和4×10^(5) Pa时,漏气口引起弹性机构的变化分别为(5.3±0.8)μm、(18.5±1.2)μm、(37.8±1.3)μm,检测时间为10 s。该测量系统具有灵敏度高、成本低且检测效率高的特点,可用于汽车电池气密性的在线检测。
An online detection system to assess the air tightness of automotive batteries based on the optical lever method has been developed.The relationship between the pressure distribution at the weld and various parameters,including battery internal pressure,air leakage direction at the weld,and detection height,is investigated.The parameters of the elastic mechanism are designed and optimized,the sensitivity model of the detection system is established,and the optical detection system is designed.The performance of the system is tested using a nano positioning platform and a battery with a leakage hole measuring 75μm in diameter.The experimental results show that the resolution of the system is 1μm.When the internal pressure of the battery is 2×10^(5) Pa、3×10^(5) Pa和4×10^(5) Pa,the displacements of the elastic mechanism induced by the leakage port are(5.3±0.8)μm,(18.5±1.2)μm,and(37.8±1.3)μm,respectively,and the detection time is 10 s.The measurement system exhibits high sensitivity,low cost,and high detection efficiency,and can be used for online detection of the air tightness of automotive batteries.
作者
王勇俊
方皖
程真英
沈益
李瑞君
WANG Yongjun;FANG Wan;CHENG Zhenying;SHEN Yi;LI Ruijun(Anhui Province Key Laboratory of Measuring Theory and Precision Instrument,School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei,Anhui 230009,China)
出处
《计量学报》
北大核心
2025年第9期1286-1293,共8页
Acta Metrologica Sinica
基金
国家自然科学基金(52475556)。
关键词
几何量计量
气密性检测
汽车电池
光杠杆法
弹性机构
geometrical metrology
airtightness testing
automotive batteries
light leverage method
elastic mechanism
