ISO 20485

Standard Methodology

The guidance divides leak testing into direct and indirect accumulation methods, outlining the calculation models for each approach. It specifies the pressure conditions, stabilization times, and temperature limits required to obtain repeatable measurements. Following these criteria ensures that tests run on different lines yield equivalent results.

Calibration Practice

To maintain compliance, test systems must utilize reference leaks calibrated to national measurement standards. This standard enforces the use of daily check routines to identify instrument drift caused by sensor degradation or chamber pollution. These steps prevent the false categorization of marginal cells.

Sourcing Impact

Cell purchase agreements reference this standard to define the acceptable leakage limits for incoming batteries. By aligning both supplier and customer test methods to a common global baseline, companies reduce disputes during incoming quality audits. This clear standard accelerates product acceptance and validation.