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Investigation of High-Temperature Endurance Test for Lithium-Ion Batteries in Vehicles
Published October 03, 2012 by Society of Automotive Engineers of Japan in Japan
International standards for safety evaluation tests of lithium-ion batteries, which are beginning to be installed in those vehicles, are IEC 62660-2 for cells and ISO 12405-1 and ISO 12405-2 for battery packs and systems. We conducted safety evaluation tests to verify the relevance of the test method. In this paper we report on the high-temperature endurance tests results. The IEC high-temperature endurance test specifies that cells should be heated to 130°C in a convective constant temperature bath, but we also heated them to 150°C. Some cells ignited while cooling from 150°C to ambient temperature. Some cells may also ignite even after being heated to the 130°C test temperature specified in IEC, so the cell temperature should fall to at least 50°C before the IEC test is terminated.