What are the advantages of helium mass spectrometry leak detection equipment compared to traditional leak detection methods

Helium, high-purity helium

Helium detection involves first removing air from the battery, then injecting helium, and using a helium mass spectrometer to detect helium leaks. On the one hand, helium is an inert gas that does not contain positive or negative electrode materials, electrolytes, etc. Reaction, which makes it very safe; On the other hand, helium is smaller than any other medium, and if there is no helium leakage inside the battery, it indicates good sealing. Battery manufacturers can choose two helium testing methods: one is intermediate testing, which involves leak detection before the battery dries and is injected with liquid; One type is the inspection of the final product, usually including leak detection after formation, with the final helium remaining in the battery. Due to the property of helium, it has advantages over leaving air in the battery and does not affect battery performance, including safety.

Buy high-purity helium and find Wuhan Yisi Tuopu Technology Co., Ltd. Click on the online inquiry or call our hotline at+86 189 8614 9031.

Nowadays, some companies choose intermediate inspection due to different processes, while others choose final product inspection. In fact, after the intermediate inspection, the finished product may still have leaks because the inlet and outlet were not identified at this time. The final product inspection includes testing the final liquid injection port of the battery, which is safer. Some battery factories are very strict, conducting inspections on both intermediate and final products to make the process more complete. This means that a battery production line is equipped with two sets of helium detection devices. Compared with traditional leak detection methods, helium gas detection has higher detection efficiency and 3-4 orders of magnitude leak detection accuracy, and has no impact on batteries. At present, the commonly used overpressure bubble gap detection method in the lithium battery industry can easily cause deformation of the battery casing, resulting in low detection efficiency and accuracy, especially for the flexible packaging of metal casings and aluminum-plastic foil lithium-ion batteries.