关键词: 锂离子电池, 电解液, 热失控, 稳定性, 安全

Abstract: The high power lithium-ion power battery is the key part of the electric powered aircraft. Whether the battery can keep normal working condition will directly determine the safety of the driver, passenger and aircraft. Therefore, the study on the safety of the high power lithium-ion power battery is very important for the spread of electric aircraft and other clean energy projects. The thermal stability of high power lithium-ion battery electrolytes is investigated in the current work. The TDB-6A flash point tester is used to determine closed cup flash point of six kinds of electrolytes. And then, the thermal runaway reactions of these electrolytes are studied using ARSST during the heating process. On the basis of these results, it can be obtained that the thermal stability of these electrolytes ranks as YH-51-7, YH-11-15, YH-61-7, YH-65-6, YH-51-6 and YH-51-8. This work is helpful for the safety investigation of high power lithium-ion batteries in light electric aircraft.

Key words: lithium-ion batteries, electrolyte, thermal runaway, stability, safety