恶劣工况下大功率直流充电车辆插头可靠性研究

Research on Reliability of DC Vehicle Plug under High-Power Charging Conditions

搭建恶劣环境下大功率直流车辆插头的充电可靠性测试环境,对四种大功率直流车辆插头进行对比测试,定义了一种模拟恶劣环境的样品处理方式,对样品进行处理,对比完好样品与经过模拟恶劣环境处理后的直流车辆插头的温升数据。对插头端子、端子前端的绝缘冒的温升进行温升布点。结果表明,经过恶劣工况处理后,CCS1抗温升能力衰减显著,国标液冷、国标油冷枪抗温升性能衰减较小,国标自然冷却枪的抗温升能力略有下滑,四种直流车辆插头的段子都有涂层性损坏,说明长期户外使用的直流车辆插头存在一定隐患,今后的设计应采取措施提升耦合处金属部件的抗恶劣环境能力。

With the increasing popularity of high-power charging,high-power DC charging plug as a highfrequency current carrying connection device,its reliability research is of great significance to the design of subsequent charging facilities.In this study,four kinds of high-power DC vehicle plugs were compared and tested to explore the charging reliability of high-power DC vehicle plugs in harsh environments.This study defined a sample processing method to simulate harsh environments,processed the samples,and compared the temperature rise data of intact samples and DC vehicle plugs after simulated harsh environments.Temperature rise distribution points shall be made for the temperature rise of the plug terminal and the insulation cap at the front of the terminal.The results show that the anti temperature rise ability of ccs1 decreases significantly after the treatment of severe working conditions,the anti temperature rise ability of national standard liquid cooling and national standard oil cooling gun decreases slightly,the anti temperature rise ability of national standard natural cooling gun decreases slightly,and the sections of four DC vehicle plugs have coating damage.Therefore,the DC vehicle plug used outdoors for a long time has certain hidden dangers,and the anti harsh environment ability of the metal parts at the coupling should be focused on.