Verifying UN 38.3 Test Summaries for Imported Cells
Verify UN 38.3 test summaries by matching technical report fields against accredited lab databases, factory trace codes, and physical SOC transport limits.
Crush Test
Meaning
Mechanical safety evaluations that apply a specific compressive force to an electrochemical cell until a voltage drop or structural rupture occurs determine the resistance of the unit to vehicle crashes. This crush test evaluates how the internal layers of a cell deform under external pressure and records the point of internal short-circuit. It is a destructively extreme test that ceases when the cell enters thermal runaway or when a preset deformation limit is met.
Sourcing engineers demand data from this test to verify that the cell structure meets automotive crash safety rules.
Force Application
The test uses a hydraulic ram with a hemispherical or bar-shaped indenter to apply force to the cell casing. Sensors measure the force, displacement, and voltage in real time.
Thermal Response
Under mechanical compression, the separator layer within the cell ruptures, causing the anode and cathode to touch directly. This results in a rapid discharge of stored electrical energy, causing the temperature to rise. Technicians monitor the maximum temperature and look for signs of fire, smoke, or explosion during the test.
Cells that deform without catching fire are rated as much safer for automotive and industrial pack designs.
Contractual Guarantee
Cell buyers write specific crush tolerance limits into their supply agreements. If a supplier fails to prove that their cells can withstand the required crush forces, the buyer will select a different cell design to avoid liability.