线束的气密性能,关系到线束是否会在使用过程中因为气密问题出现漏电而导致汽车故障的发生。为保障安全,在生产组装的过程中会针对汽车线束进行气密性检。
除非主机厂有额外要求,一般高压线束总成零件的密封等级要求如下表:文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
高压线束总成产品密封等级要求文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
使用泄露测试仪对高压线束总成进行负压检测，测试仪精度不低于±0.5pa,采用完整的高压线束总成(建议使用量产模具生产的零件)作为试件进行测试.文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
将试件回路上的连接器、对应连接器后第一个线束固定点和两者之间的线束应按照在整车的走向固定在测试工装上,将被测样品连接器的对插端、测试治具、空气管路、泄露测试仪等组装完成,保证空气管路和测试治具连接处接头不漏气.文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
试件在测试箱内的状态文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
调节气源管路压力/真空源,当被测系统中气压达到30KPa正压或30KPa负压时,保持此气压稳定后,关闭压力气源,同时开始测量15 秒后,读取系统气压P,泄露气压值δP为测量读出的气压P和初始之间的差值,泄露量应不大于100pa,则视为合格.文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
推荐阅读：文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
高压线束的耐高压测试文章源自线束工程师之家-https://www.suncve.com/test-method-for-air-tightness-of-high-voltage-harness/
