Helium Mass Spectrometry for Micro Leak Detection in Battery Envelopes
Inline helium mass spectrometry detects sub-micron battery envelope leaks down to 10-8 mbar l/s, preventing moisture-induced HF corrosion and solvent loss.
Standard Leak Calibration
Meaning
Metrological verification procedures establish the accuracy of leak detection equipment by utilizing reference leak artifacts with known flow rates. Implementing a standard leak calibration ensures that the tracer gas detection systems used in battery factories provide reliable and comparable measurements. This reference provides the quantitative baseline required to convert raw detector signals into standard flow units.
It allows manufacturers to align their quality control thresholds with the technical limits defined in customer purchase agreements, minimizing disputes over component acceptability.
Reference System
The reference artifact consists of a sealed reservoir of tracer gas that escapes through a capillary or a permeable membrane. This device delivers a constant gas flow rate under specified temperature and pressure conditions. By measuring this flow, the detection system adjusts its gain to compensate for sensor aging or chamber pollution.
System Maintenance
Calibration is performed at start-up, shift changes, or after maintenance to track sensor drift over time. Exposure to high concentrations of helium or volatile organic compounds can saturate the detector, requiring a recovery period. This routine calibration protects the test line from both false rejects and missed leaks.
Quality Compliance
Quality standards require that the reference artifacts undergo annual calibration at certified testing laboratories. These records must be traceable to national standards to satisfy the requirements of automotive quality audits. This documentation protects the manufacturer during product validation phases.