Laboratory Accreditation Audits and Batch Traceability in Air Dangerous Goods Compliance
Validating ISO 17025 lab schedules and continuous cell batch traceability prevents air transport cargo rejection and shifts regulatory liability to suppliers.
Vibration Testing
Meaning
An environmental stress simulation subjects finished battery packs or modules to continuous physical oscillation to ensure long-term durability against road vibration. This testing ensures that vibration testing detects mechanical fatigue, loose wiring, or weld degradation before the battery packs enter service. The evaluation simulates years of operating wear within a compressed testing window.
Simulation Method
Test technicians secure the battery assembly to a high-capacity electrodynamic shaker table that delivers pre-programmed oscillation patterns. These patterns use random vibration profiles that mimic the varying frequencies encountered on paved roads and gravel surfaces. This dynamic stress occurs across three perpendicular axes to verify mechanical robustness in all directions, which exposes any design flaws in the internal mounting hardware.
Failure Diagnostics
Real-time monitoring of voltage and temperature during the evaluation reveals loose terminal connections or micro-cracks in the busbars. If a electrical connection breaks, the diagnostic software logs a voltage drop and the test is halted for inspection. This inspection locates structural weaknesses in the cell module assembly before mass production begins.
Sourcing Criteria
Automotive buyers require these durability tests as part of the production part approval process. Cell suppliers must submit certified test results to prove the physical integrity of their modules. This documentation mitigates the risk of high-warranty claims in the field.