The sealing performance of battery packs and cells is crucial for their performance and safety. Poor sealing can lead to electrolyte leakage, which may cause battery short circuits, thermal runaway, and even fire or explosion, posing serious safety risks. The intrusion of external impurities such as moisture and dust can also affect the chemical stability and electrochemical performance of the battery, leading to capacity decay and shortened lifespan. To prevent leakage and impurity contamination issues, sealing tests for power battery packs and cells should be conducted multiple times during the manufacturing process. The application of helium detection equipment for the new energy industry is mainly reflected in its high sensitivity, rapid response, and non-destructive testing characteristics, thereby ensuring the sealing and safety of batteries.
In the cell manufacturing process, helium detection technology is primarily used for pre-filling shell welding sealing tests (pre-helium detection) and post-filling sealing welding tests (post-helium detection). Pre-helium detection typically employs the positive pressure helium detection method, which involves filling the cell with helium and detecting any external leakage. Post-helium detection uses the negative pressure helium detection method, where the cell is placed in a vacuum environment to detect any helium escaping from the interior. These detection methods can effectively identify minute leakage points, ensuring the sealing of cells during the filling and sealing processes.
Battery PACK sealing tests mainly include PACK tray sealing tests, PACK cover sealing tests, cooling plate tests, and PACK atmospheric pressure accumulation tests. These testing stages, through helium detection technology, can comprehensively evaluate the sealing performance of battery packs across different components and overall structures, ensuring the safety of battery packs under complex operating conditions.
The high sensitivity of helium detection technology is one of its core advantages. Helium, as an inert gas, has small molecules and fast diffusion speed, allowing it to penetrate extremely tiny leakage points. Detection equipment can precisely identify leakage locations and amounts by capturing helium molecule leakage signals, with sensitivity reaching up to 10^-9 Pa·m³/s, far surpassing traditional detection methods.
Rapid response is another significant feature of helium detection technology. On battery production lines, time is efficiency. Helium detection can complete sealing tests for battery packs and cells in a short time, ensuring the continuity and efficiency of the production process. This rapid response capability not only improves production efficiency but also reduces production costs.
Non-destructive testing is yet another important advantage of helium detection technology. Traditional detection methods may cause physical damage to batteries, whereas helium detection is completely non-destructive and does not affect battery performance and lifespan. This non-destructive characteristic has led to the widespread application of helium detection technology in battery manufacturing, especially in the high-precision and high-demand field of power batteries.
In practical applications, helium detection technology needs to be closely integrated with automated equipment. Automated equipment enables rapid and precise detection of battery packs and cells, reducing human error and improving the consistency and reliability of detection. This automated detection method not only enhances production efficiency but also ensures the accuracy of detection results.
Gadro specialize in industrial detection equipment, automated production lines, digital smart factories, industrial internet big data systems, and more. We have a high-quality team with years of industry experience. Our industry involvement spans high-end fields such as power electronics, automotive, new energy, refrigeration, new materials, IoT, intelligent manufacturing, aerospace, and military research. If you have a need for customized helium detection equipment, please feel free to contact us at any time. We can offer customizable options such as helium pressure (MPa), helium recovery or not, production rhythm (seconds/piece), number of vacuum tanks, and vacuum chamber rhythm (seconds/tank).