Study on thermal control decoupling and pre-regulating enhancement of battery direct cooling integrated thermal management system

Abstract

The battery direct cooling thermal management system (TMS) is affected in its application due to the coupling interference with the air conditioner system. In this paper, decoupling of both refrigeration and control is realized through the design of structure and control method. The results show that the refrigeration decoupling make TMS is able to realize the regulation on the cooling capacity of the two branches, and control decoupling make TMS achieved better performance, and saved about 54.81 % of the energy consumption under the defined dirving cycle. Next, to mitigate the negative impact of large thermal inertia on the TMS, this paper designs a Pre-regulating framework in the background of the continuous development of vehicle informatization, while through the analyze on the effects and characteristics of control components and intervention times, achieved performance enhancement using the multi-component coordinated control. Based on the Pre-regulating framework and its performance enhancement, an overall system control strategy was designed and validated. The results show that the designed control strategy is able to reduce the battery temperature rise and the cabin temperature fluctuation by 81.7%–86.9 % and 2.84%–4.29 % with 2.22%–3.08 % energy efficiency improvement.

Keywords

• Automotive air conditioner
• Battery thermal management
• System control