Abstract
In this work, a high energy efficiency double-sided thermoelectric device system for wide range temperature control of cylindrical battery modules is proposed. The heat dissipation and temperature control effects of the double-sided TED device are first evaluated by the experiment and then the cooling and heating performances of TED are analyzed using analytical models. The optimal current is 8.22 A at ambient temperature from −20 °C to 40 °C to balance thermal performances and efficiencies. Experimental research shows that the double-sided TED cooling system reduced the maximum temperature by 35.6 ∼ 15.3 °C, under the heating power of 3 ∼ 5 W for battery cell, which is superior to the pure liquid cooling system. Meanwhile, the maximum temperature and temperature difference of the battery module remain within 25.0 °C and 4.7 °C, respectively, with the battery cell power of 5 W. The two-way switching between cooling and heating of the battery module is realized by changing the direction of the TED current. In the heating mode, the heating efficiency is always greater than 1.24, which is superior to other external heating techniques. Battery temperature fluctuation was well minimized by introducing a temperature controller. This research demonstrates the effectiveness of TED integrated thermal management system for battery modules.
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