Target: Currently, too much humidity enters batteries through semipermeable membranes of emergency degassing, leading to unwanted corrosion. What methods can prevent this? Methodology: This is also a challenge for emergency degassing paired with a pressure equalization function. What materials and designs are appropriate to achieve the reduction? Approaches are: 1.) splitting the function into pure pressure equalization and into emergency degassing element without membrane. 2) reduction of the air flow rate of the membrane 3) Splitting of the membranes of the emergency degassing elements into gas-tight and semi-permeable. Results: The presentation looks at the different approaches in terms of technical feasibility, financial aspects and time required for production and installation. In addition, evaluations of tests are presented. The result is open-ended, each developer/manufacturer of batteries for BEV or NAT applications must decide for himself which approach is best for the application. Additionally, the aspects of PFOA and PFAS on the membrane material are considered. Discussion: How useful are the current approaches in terms of cost. Shouldn`t these aspects be incorporated earlier in the development and design of battery cases?
Session:
Poster
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