Numerical Simulations for Lithium-Ion Battery Pack Cooled by Different Minichannel Cold Plate Arrangements

In real electric vehicles, the arrangement of liquid-cooled plates not only influences thermal performance battery pack but also relates to energy consumption BTMS and compactness whole pack. this study, design A, B, C, D, a total four different designs management based on with microchannels, are proposed for 35 V composed 12 LiFePO4 pouch cells connected in series, corresponding three-dimensional electrical-thermal-fluid model is established numerical study. The cooling effects discussed compared terms discharge rate, contact resistance, external short circuit. For cold placed front each cell. results show that D achieves best effect lowest power other three under 0.5C, 1.0C, 2.0C rate. Its maximum temperature about 30°C, difference 5°C. reduction resistance has magnitudes plate arrangements, overall small. extreme condition circuit, increasing mass flow rate can reduce from 76.6°C by 27.5% 55.5°C 35.0°C 23.4% 26.8°C. Selecting proper coolant keep gradient within tolerable level, helps enhance effect. designs, temperatures gradients exceeded 90°C 40°C circuit condition, very little enhancement.