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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 and other complex factors during the manufacturing process.

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 there is 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 detection process to effectively detect the presence of leaking batteries.

Such problems lead to shortened battery life and poor customer experience, which will directly damage 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.

↑HiraysElectrolyte leakage detection solution

↑yaxin868RGA structure diagram

The ion source uses electron bombardment ionization to ionize gas molecules into ions. For example, for common gas molecules such as nitrogen (N₂), oxygen (O₂), etc., will form corresponding ions such as N₂⁺, O₂⁺, etc. under electron bombardment. The same principle is used for batteries, and ionization analysis is performed on the electrolyte components.

↑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 battery leakage detection methods

Compared with other detection methods, mass spectrometry (RGA) has no consumable cost and an accuracy of up to 1*10^-12Pa·m³/s, it directly detects the electrolyte without interference and no missed judgments, which can help battery manufacturers greatly improve product quality.

Hairus HM online mass spectrometer

It performs mass spectrometry analysis on the electrolyte through mass spectrometry. By analyzing the concentration and composition of the residual gas in the vacuum chamber, it determines whether there is leakage of the battery electrolyte. If there is leakage, the instrument automatically sends an alarm signal.

↑Heruis HM series online mass spectrometer

Online mass spectrometer analyzerWith the characteristics of single-station integration, low cost, high precision, fast pace, high stability, intelligent detection and no missed judgment,Settled in the battery production line of a leading car company and some major domestic battery manufacturers to help the healthy development of the domestic battery industry.