一般需要一年一次检查,新能源汽车电池的密封一般是通过电池包箱体结构密封和密封圈辅助密封来实现的,电池箱体上下可以通过激光拼接(焊接)实现整体密封,这是结构性密封;电池箱还会采用密封圈或者防水密封胶等协助做到更好的密封。有一些电池的比如说电动公交车上的电池包的体积较大,精密程度高。电池包一般是有防水透气孔(用来安装防水透气阀)的,在用电池箱气密性检测设备进行检测时可以往防水透气阀安装孔里充入压缩气体进行检测,这样的直接检测方式能够保证不对电池造成二次损伤,同时检测结果也更加准确。
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