Modeling of the Cooling of the Batteries of Electric Vehicles Using the Cabin Air Conditioning System

Abstract

In this study, a simulation on management of battery temperature, which is a significant problem for electric vehicles, has been made. Battery temperatures can reach up to 50 oC if not checked during quick charging and discharging processes. Such situation shortens the lifetime of battery and also increases the temperature inside the cabin. More importantly, they can be dangerous. LMS Amesim software and WLTC driving cycle have been used for the simulation. Three battery packages have been used in simulations. Temperature of the battery have been checked at three different ambient temperatures (25 oC, 30 oC, 35 oC). During the test, it has been enhanced to keep the battery temperature below 35 oC under all conditions. Air-conditioner of the vehicle has been used to cool the batteries. When the temperature increased, the air-conditioner automatically checked the operating cycle of the compressor and cooled the batteries by means of constant air flow. In conclusion, the simulation has kept the battery temperature at desired level at ambient temperatures of 25 oC and 30 oC. At ambient temperature of 35oC, battery temperature increased up to 35.2oC.

Keywords

• Battery temperature management
• Electric vehicle
• Hybrid electric vehicle
• WLTC driving cycle

References

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