A novel multilayer composite structure based battery thermal management system

The battery thermal management system (BTMS) utilizing phase change materials (PCM) has shown promising performance in high heat flux dissipation. However, conventional PCM systems do not fully exploit the latent properties of paraffin wax to enhance cooling efficiency. To address this issue, paper proposes a novel multilayer composite material for BTMS, aiming improve and overcome low conductivity wax. preparation process involves positioning at center triangular container, melting pouring it into 100 mm container form 20 layer, placing copper foils graphite layers on surface, repeating step once. Finally, pour 40 resulting sandwich-like structure with two graphite. was experimentally tested different ambient temperatures (15°C 20°C) discharge rates, compared BTMS based pure results demonstrate that exhibits superior dissipation structure, significantly reducing temperature rise, particularly higher rates. At an 20°C rate 5°C, rise is only 14.97°C, remarkable effect 32.6%. Moreover, optimization number thickness reveals 6-layer outperforms 2-layer, 4-layer, 8-layer, 10-layer structures. Additionally, relatively lower surface observed 0.5 basis structure. These findings indicate proposed layout excellent performance, effectively addressing limitation traditional systems, providing new approach lithium batteries.