Battery Technology and E-Mobility

Burst Tests: Burst tests are used to investigate and verify the function of the rupture membrane. New concepts, such as top-potting as an over-molding or cell insulation using varnish or foiling, influence the burst pressure. The constant evolution of geometry, materials, and processes can be permanently validated using the Pressmetrics.

External Pressure Tests: Fluctuating ambient conditions place additional stress on the cell. In high-performance applications, immersion cooling with a dielectric fluid is often used. This thermal fluid transmits pressure and temperature fluctuations directly to the cell. The Pressmetrics simulates these loads using the original cell housing.

Cycling Tests: Chemical effects such as swelling or breathing of the cell over its service life lead to material fatigue. Using air pressure and a “swelling pad,” the cell housing is subjected to the exact forces and pressures encountered in the real product life cycle. A subsequent burst test reveals whether the rupture disk still functions correctly after multiple charging cycles.

Module-like Test Environment: In a module, multiple cells are grouped together. The clamping forces, force application points, and stiffnesses within the module are replicated by the Pressmetrics clamping device. Cells are arranged and installed just as they would be in a module to investigate their mutual interference. As an additional benefit, the clamping device is suitable for vibration testing.