ROSEMONT, IL – During operation, the battery cells are placed in the vacuum chamber during the test. In the presence of a housing leak, partial vaporization of the electrolyte solvent occurs, and it exits from the cell towards the vacuum chamber. The test principle is based on the possibility of measuring the extent of the leak by tracing these electrolyte vapors with a quadrupole mass spectrometer.

Cells can be tested in different stages of the production process: immediately after electrolyte filling and sealing, after formation, or after degassing and subsequent final sealing, and up to the check during the end-of-line testing. The Marposs automatic system is also available for testing of cylindrical and button cells and pouch cells. The pouch cell version requires tooling to constrain the surface of the cell to avoid swelling when the vacuum is performed. The systems can trace different types of solvents typically used in the production of lithium-ion cells, such as DMC, DEC, EMC, PP, etc.

In addition to solutions for battery production, Marposs designs and manufactures solutions capable of meeting the needs of high precision assembly of metal and glass components for the automotive, electronic, and biomedical sectors including cutting edge technologies for dimensional checks, leak testing, mechanical and electrical functional tests.

For more information on Marposs’ solutions for battery assembly and test, visit https://www.marposs.com/eng/application/electrical-testing-on-prismatic-battery-cells or contact Marposs Corp. at (248) 370-0404 or marposs@us.marposs.com

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