Use our configurator to determine the proper lower plunger for your battery test.
PAT-Core: Lower Plunger Configurator
By default, the lower plunger serves as the positive current collector. The materials are the same as for the upper plunger; however, the lower plunger comes in different sizes (height numbers) to accommodate different thicknesses of the lower electrode and separator. Available height numbers range between 50 and 800 in steps of 50.
We recommend using the Lower Plunger vario for all height numbers between 50 and 500. The Vario plunger adapts flexibly to different heights and ensures optimum positioning. For height numbers greater than 500, or for special applications, fixed-height plungers can be used.
In these cases the proper plunger height must be chosen to ensure that the pre -assembled separator is not excessively bent during assembly of the PAT -Core. The proper height number depends on both the thickness of the lower electrode and the thickness of the built -in separator.
Please note that the height number starts with a zero point offset of 50. The height number does not refer directly to the height of the lower electrode in μm.
Good case: No bending of built-in separator; reference ring is in plane with separator.
Gap too large: Excessive downward bending of built-in separator; reference ring is out of plane with separator. -> Lower plunger height must be increased.
Gap too small: Excessive upward bending of built-in separator; reference ring is out of plane with separator. -> Lower plunger height must be reduced.