Symmetrical complex serpentine channel introduction of secondary openings with open Y fins integrated optimization design.

A new type of symmetrical and complex serpentine channel liquid cooling plate was proposed to address the problem of high temperature and poor temperature uniformity in square battery packs when discharging at high temperatures and high multipliers. Experiments were first conducted with an initial liquid cooling plate model for confirming dependability of the CFD method. In order to reduce the local high temperature in the liquid cooling plate and optimize pressure drop in the system, a method of optimisisation by adding internal secondary openings was introduced here. Then, a single-factor sensitivity analysis was conducted on the liquid cooling plate channel parameters. Several variables having a large effect on the average temperature and pressure drop of the liquid cooling plate were uesd as independent variables and the mean temperature and pressure drop of the liquid-cooled plate were used as targets for the multi-objective optimization of the channel structure. A new open Y-shaped fin was introduced on the basis of the multi-objective optimization solution to further improve the thermal performance of the liquid cooling plate. Using the orthogonal experimental method, the open Y fins were optimized to obtain the optimal model of the liquid-cooled plate. Introducing open Y-shaped fins to the liquid cooling plate could enhance its performance on a comprehensive level, and the optimal liquid cooling plate model decreased the average temperature from 46.7 °C to 44.2 °C, a decrease of 5.35%, compared with the initial liquid cooling plate model. The pressure drop decreases from 49.04 pa to 32.69 pa, a decrease of 33.34%. The results proved that the optimized liquid-cooled panels provide better cooling performance and higher energy efficiency. • Secondary openings effectively reduce localized high temperatures in cold plate. • Reciprocating channel structure design enhanced the heat dissipation of cold plate. • The addition of open Y-shaped fins in the channel improved cooling performance. • After optimization, the temperature and pressure drop were reduced by 5.35% and 33.34%. [ABSTRACT FROM AUTHOR]