Abstract: The advantages of liquid cooling in battery packs compared to air cooling and the shortcomings of existing commercial liquid-cooled battery packs are analyzed. CFD technology is used to simulate the temperature field of the battery packs, and the results shows that the large bottom plate cooling method only adopting bottom cooling would result in a large temperature difference between the upper and lower parts of the battery cell body, based on which three improved designs for liquid cooling of battery packs are proposed by heat transfer analysis. At the same time, for the application scenario of large capacity energy storage power plants, a centralized chiller scheme is put forward, and improvement suggestions are proposed such as combining cooling scheme with fire protection function, optimizing temperature measurement point layout, and charging and discharging control algorithm, and so on.