基于氦气质谱法的动力电池包热管理模块密封性检测系统

Sealing Detection System for Thermal Management Module of Power Battery Pack Based on Helium Mass Spectrometry

根据动力电池包热管理模块密封性检测要求,提出一种基于氦气质谱法的动力电池包热管理模块密封性检测系统。为避免氦气泄露污染,先利用低氦进行大漏粗检,再利用氦气进行精检;通过氦气回收和氮气清扫等工艺,降低检测成本,提高检测可靠性;采用双真空箱交替工作模式,提高检测效率。经实验验证,最小检测漏率小于1.5×10^(-6)mbar·L/s,满足动力电池包热管理模块密封性检测要求。

According to the sealing inspection requirements of the thermal management module of the power battery pack,a sealing inspection system for the thermal management module of the power battery pack based on helium mass spectrometry is proposed.To avoid helium leakage pollution,first use low helium for large leakage rough inspection,and then use helium for fine inspection;By using processes such as helium recovery and nitrogen cleaning,the cost of testing is reduced and the reliability of testing is improved;Adopting a dual true empty box alternating working mode to improve detection efficiency.Through experimental verification,the minimum detection leakage rate is less than 1.5×10^(-6)mbar·L/s,which meets the sealing detection requirements of the power battery pack thermal management module.