In order to simulate the flow structure and temperature distribution in battery pack and explore the turbulence adaptability of k-ε model widely used in engineering, applied a simplified lithium-ion battery package and established the overlapping and tube bundle arrangement discrete model for the research. Made numerical simulation with 3 kinds of k-ε turbulence models and obtained the flow field and temperature field under different arrangements. The analysis results show that RNG k-ε model has great advantages for the simulation of small scale and large curvature derivative vortex, and the shape and the size of the vortex is very different from Standard and Realizable k-ε models. Standardk-ε model can better reveal the impact of reflux effect on the rear of the cell temperature. Under the tube bundle arrangement, the battery pack has better temperature distribution uniformity and more excellent heat dissipation performance.