SAE J2983_201910

This SAE RP provides a set of test methods and practices for the characterization of the properties of Li-battery separator. The test methods in this RP have been grouped into one of three categories: 1 Separator material parameters: Minimum set of separator properties to be measured. 2 Chemistry/customer-specific parameters: Properties that are dependent on the application, customer needs and/or requirements, manufacturing process, etc. This RP will include the current best practice methodologies for these tests, with an understanding that the best practice methodologies are evolving as more information is learned. 3 R&D parameters: Properties that are dependent on the application, customer needs and/or requirements, manufacturing process, etc. The methodologies in this third section are under development and have not yet achieved broad application. It is not within the scope of this document to establish criteria for the test results, as this is usually established between the materials supplier and seperator manufacturer and the user. This is especially true where this document specifies a range of target values, or an open testing parameter. In these cases, the sample supplier and recipient must agree to specific numbers for the test parameters. As the market for Li-battery continues to grow, due to the evolution of motive and stationary power applications, new separator concepts are being proposed for incorporation into the batteries, including solutions using a composite of different materials. Solutions include ceramic or high temperature polymer coatings for traditional separators, as well as other solutions incorporating high temperature fibers, high temperature polymers, or ceramic materials. The need for thermal stability is becoming important as the thickness of separators is reduced and the energy density of electrode materials increases. There are a variety of properties that should be measured and a variety of methodologies to perform testing. This Recommended Practice (RP) provides a set of test methods for the characterization of the Li-battery separator’s properties, which, if used consistently across different materials, will facilitate the comparison of the properties of Li-battery separator.