Lithium batteries are at risk of leakage due to external force damage such as collision, extrusion, puncture, poor welding, loose sealing, excessive charging and discharging during the manufacturing process, and other complex factors.

For example, the spot welding between the negative electrode tab and the steel shell is abnormal, resulting in a gap; another example is the laser welding between the cap and the steel shell, which is abnormal and creates a gap.The extremely small gap will not leak when it is first produced, but as moisture enters during use, the internal air pressure of the battery increases.The electrolyte will be squeezed out from the gaps, causing leakage.Because the gap is too small, it is difficult for the inspection process to effectively detect the presence of leaking batteries.

Such problems lead to shortened battery life and poor customer experience, which will directly harm business and brand development.It is an indispensable link to detect the minimum leakage of lithium batteries. Using mass spectrometry analysis (RGA) to detect battery leakage can effectively prevent defective products from entering the market and improve battery safety performance and the company's product quality reputation.

↑HiraysiElectrolyte Leak Detection Solutions

↑HiraysiRGA structure diagram

The ion source uses electron bombardment ionization to ionize gas molecules into ions.For example, for common gas molecules such as nitrogen (N?), oxygen (O?), etc., will form corresponding ions such as N??, O??, etc. under electron bombardment.The same principle applies to batteries, and ionization analysis is performed on the components of the electrolyte.

↑Common battery electrolyte ingredients

By applying specific DC and radio frequency electric fields through the quadrupole mass analyzer, ions with different mass-charge ratios have different motion trajectories in the electric field, thereby achieving ion separation.Finally, the detector detects the number of ions to determine whether there is leakage of lithium battery electrolyte.

↑Introduction to five detection methods for battery leakage

Compared with other detection methods, mass spectrometry (RGA) has no consumable cost and an accuracy of up to 1*10^-12Pa·m³/s，它是對電解液進(jìn)行直接檢測，不受干擾且無漏判，可以幫助電池生產(chǎn)商大幅提高產(chǎn)品質(zhì)量。