Thermal characteristics of Li‐ion battery based on phase change material‐aluminum plate‐fin composite heat dissipation

A reliable battery thermal management system (BTMS) not only can effectively decrease the maximum temperature but also maintain uniformity of lithium-ion (Li-ion) after grouping. Nevertheless, considering deficiency a single heat dissipation method, there exist challenges in efficient structure design, especially at high discharge rates. In this work, composite module with phase change material (PCM)–aluminum plate–fin is proposed. Meanwhile, transient effects different rates, melting points, and thickness PCM on characteristics are analyzed. Results show that PCM–aluminum be reduced by 25.8°C, 11.0°C, 10.2°C respectively 4 C rate compared natural convection, aluminum plate–fin, paraffin PCM, experimental error among them less than 5%. During 2–5 discharging, increases first then decreases, which leads to trend difference rising bending twice. When ambient 25°C, point 28°C implemented for cooling because its more rapid absorption. The increase beneficial module. optimal 3 mm realize control within 2.5°C.