Since lithium-ion power batteries are sensitive to environmental temperature, and the battery liquid thermal management technology has a good effect on temperature control, this paper aims to review the application of liquid thermal management technology in battery thermal management and its effect. Taking liquid cooling technology and liquid heating technology as the research starting point, by reviewing the current status of the application of these two technologies in the thermal management of lithium-ion power batteries, in-depth analysis of its effect on battery temperature control. The study shows that liquid cooling plate cooling is effective, but the system is complex, and needs to optimize the lightweight and safety design in the future; liquid cooling pipe cooling is lightweight, but the application is limited, and needs to be further explored; Submerged liquid cooling can significantly reduce the battery temperature and improve the uniformity, but it needs to solve the sealing and heat dissipation in dynamic driving; drop liquid cooling is highly accurate and lightweight, and is a hotspot of future research; liquid heating can quickly preheat the liquid heating can quickly warm up the battery pack, and the integrated design can improve the efficiency and reduce the cost.