Optimization of liquid cooling technology for cylindrical power battery module

摘要

Liquid cooling technologies for large battery modules are facing challenges of optimizing their structure due to the many variable factors. In this work, a simplified yet effective strategy coupling single-factor analysis with orthogonal test is proposed to overcome this barrier in large battery modules. We systematically study the influence of the inlet velocity, channel number and contact angle on the cooling performance and thereby optimize the structure. The influence rank of the factors follows the order of "contact angle" > "inlet velocity" > "channel number", indicating that the contact angle has the most significant influence on the cooling performance, which should be fixed at about 70 degrees. Channel number shows slight influence on the cooling performance in large battery modules. The suitable values of the inlet velocity and channel number are variable within the ranges of 0.2-0.5 m.s(-1) and 1-2, respectively, based on different specific applications, particularly those targeting higher cost-efficiency.