Summary Battery thermal management system (BTMS) is of great significance to keep battery of new energy vehicle (NEV) within favorable thermal state, which attracts extensively attention from researchers and automobile manufacturers. As one BTMS scheme, pumped two‐phase system displays excellent cooling capacity owing to large amount of latent heat usage, while there is limited research efforts focusing on the feasibility of the BTMS scheme. This paper experimentally investigates thermal performance of a pumped two‐phase BTMS heated by a dummy battery with relative high heat fluxes. The effects of heat fluxes, flow rates and cold source temperatures on thermal performance have been studied and conclusions have been drawn accordingly. The results show that the thermal performance of the system is generally enhanced with the increase of the refrigerant flow rates. When the heat flux and cold source temperature are 0.11 W/cm2 and 10°C, respectively, tavg and △tmax are decreased by 3.4°C and 0.5°C, respectively, when the refrigerant flow rate is increased from 0.20 to 1.67 L/min. Meanwhile, heat transfer coefficient is also improved with an increase of the flow rates, while the enhancements become less obvious under high heat flux. In addition, the tavg and △tmax of cold plate surface are increased when the heat flux is elevated, while the tavg at the low flow rate is increased slightly. However, the increase of △tmax is more obvious at the low flow rate, compared to that at high flow rate. When the heat flux is increased from 0.11 to 0.60 W/cm2, tavg is increased by 3.8°C under the flow rate of 0.2 L/min, while that at the flow rate of 1.67 L/min is almost doubled. Meanwhile, the heat transfer coefficient is increased monotonously at the low flow rate, while that at the high flow rate is first decreased and then increased. Besides, lower surface temperatures can be obtained with low cold source temperatures. However, cold source temperatures affect temperature uniformity less.

We wish to report a set of seventeen β-amino ketones bearing nabumetone and trifluoro-methylaniline(TFMA) moieties. Synthesized via direct Mannich reaction in a solution of ethanol-chloroform catalyzed by concentrated hydrochloric acid, the chemical structures of these compounds were characterized by IR, 1 H NMR, 13 C NMR, ESI MS and HR MS. Studies on their antidiabetic activities revealed that all title compounds possessed moderate α-glucosidase inhibitory activities and protein tyrosine phosphatase 1B (PTP 1B) inhibitory activities. Among them, a few compounds also exhibit considerable peroxisome proliferatoractivated receptor response element (PPRE) agonist activity, in particular the relative PPRE agonist activity of compounds 1r and 1l reached 54.02% and 57.60%, respectively. These results represent significant examples of new molecular type for antidiabetic agents that merit further evaluation.