5/30/2023 0 Comments Intel r g41 express chipset![]() The crosshead speed is dependent on the length of the specimen and can be calculated by multiplying the initial grip separation (length of the specimen) by the initial strain rate in mm/mm x min. Learn More About Electric Vehicle TestingÄuring ASTM D882 testing, specimens are pulled in tension until failure. Additionally, as is the case for many other thin film materials, separator film is anisotropic and so is recommended to be tested in multiple different cutting/testing directions. Testing these materials in accordance to ASTM D882 can be very beneficial for quality control checks as well as in R&D when trying to determine the optimal separator film solution. Safer and stronger separator material more effectively prevents contact between the anode and cathode, while thinner material helps reduce the weight of each battery and improve energy density. The most common material used for separator film is polyolefin, a polymer film that is strong enough to withstand the winding operation during assembly as well as uneven plating of lithium on the anode due to extensive use. Separator films are a critical part of lithium-ion and other liquid electrolyte batteries that separate the anode and cathode. Though ASTM D882 is not an official standard for testing EV battery separator films, this standard is being modified to evaluate the mechanical properties of these materials. Separator Film Testing for Electric Vehicle Batteries
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