A study on the temperature stabilization time during temperature environmental test of the battery system for green cars

The latest paradigm in the global automobile market is shifting toward environment-friendly vehicles (such as HEVs, PHEVs, and EVs), and high-efficiency, large-capacity lithium rechargeable batteries are being used to increase vehicle´s fuel efficiency and extend the driving distance. However, there have been safety concerns, including batteries in recently sold environment-friendly vehicle catching fire. In order to address these issues and to secure safety, manufacturers of rechargeable batteries and environment-friendly vehicles are performing reliability tests prior to installing batteries in the vehicles. Most standards for temperature-related environmental tests for battery systems are in the works, and the ones that have been established adhere to the specifications for electrical systems installed in conventional automobiles. Therefore, this study analyzes the results of comparative experiments to assess whether the temperature environmental evaluation test guidelines for electrical systems in conventional vehicles can be applied to battery systems for environment-friendly automobiles.