Meaning
Mass loss occurs when lithium batteries lose active material or electrolyte during mechanical vibration protocols mandated for transport safety. Evaluation of un 38.3 t.2 mass loss identifies if internal components remain physically contained and chemically stable under high frequency oscillation. The metric requires that cells and batteries demonstrate zero mass decrease exceeding defined percentages relative to their initial weight.
Strict adherence prevents leakage or venting during transit conditions.
Vibration Severity
Simulated transport environments subject lithium cells to vertical and horizontal harmonic motion across a specified frequency range. Equipment oscillates the samples with a logarithmic sweep from low to high cycles per second to mimic the stress of aircraft cargo holds. Engineers measure the weight of each unit before and after the full test sequence to calculate precise variance.
Failure occurs if a specimen drops below the weight threshold or exhibits structural cracks.
Procedural Limit
Quantifiable weight reduction signifies that a battery has likely experienced venting or external casing rupture. Laboratories determine the threshold for acceptable loss based on the total initial mass of the device. Smaller cells possess tighter tolerance levels because minimal electrolyte escape represents a higher proportion of their capacity.
Consistent mass measurement validates that internal containment systems perform as designed under sustained mechanical excitation.
Safety Verification
Transportation regulations dictate that lithium energy storage products undergo rigorous endurance testing to confirm their handling characteristics before movement. Compliance with these protocols removes the threat of fire caused by short circuits from vibration-induced damage. Regulators view the absence of mass change as definitive proof that the electrode assembly remains intact and sealed.
Success in this assessment allows the product to move through global supply chains without elevated risk of hazardous failure.
