Liquid cooling-based battery thermal management systems (BTMs) have emerged as the most promising cooling strategy owing to their superior heat transfer coefficient, including two modes: indirect-contact and direct-contact. Direct-contact liquid BTMs, also referred to as immersion cooling systems, have garnered significant attention.
The development content and requirements of the battery pack liquid cooling system include: 1) Study the manufacturing process of different liquid cooling plates, and compare the advantages and disadvantages, costs and scope of application;
In order to design a liquid cooling battery pack system that meets development requirements, a systematic design method is required. It includes below six steps. 1) Design input (determining the flow rate, battery heating power, and module layout in the battery pack, etc.);
Currently, numerous immersion liquid cooling technologies have been extensively employed for the purpose of cooling 18650 and 21,700 batteries. However, their implementation in the context of 4680 batteries remains relatively limited, with a dearth of research exploring the influencing factors during the boiling process.
In this study, a liquid immersion cooling system based on the pool boiling mechanism was proposed, and its cooling performance for 4680 battery packs under high-C rate conditions was evaluated. The effects of bubble growth and heat transfer mechanism were analyzed. Based on the obtained findings, the subsequent conclusions were derived:
Liquid-cooled battery packs have been identified as one of the most efficient and cost effective solutions to overcome these issues caused by both low temperatures and high temperatures.