The booming development of the new energy vehicle industry has placed increasingly demanding requirements on battery safety, energy density, and service life. Battery packs generate substantial heat during charging and discharging cycles; if this heat is not effectively dissipated in a timely manner, it can lead to elevated battery temperatures, capacity degradation, shortened cycle life, and in severe cases, thermal runaway resulting in safety incidents. Therefore, efficient and reliable thermal management systems have become a critical element in new energy vehicle battery pack design. In this domain, thermal conductive plastics are gradually replacing traditional metal materials with their unique material advantages, becoming one of the core materials in battery thermal management solutions.

Traditional new energy vehicle battery thermal management systems primarily rely on metal heat sinks (aluminum alloy or copper alloy) combined with liquid cooling plates to achieve heat conduction and dissipation from battery modules. While metallic materials offer excellent thermal conductivity, their high density imposes weight penalties, thermal expansion coefficient mismatch with battery modules creates interfacial thermal resistance issues, and the potential for short circuits posed by metallic materials remains a persistent technical challenge for engineers. The emergence of thermal conductive plastics provides a systematic solution to these problems.

Thermal conductive plastics find applications in battery thermal management systems in several key areas. First, thermal interface adhesives and thermal pads: thermally conductive plastic-based composite materials used as thermal interface materials can effectively fill microscopic gaps between battery cells and heat sinks, significantly reducing interfacial thermal resistance and improving heat transfer efficiency. Compared to traditional silicone grease interface materials, thermal conductive plastic pads offer superior long-term stability and aging resistance, without drying out or hardening over time. Second, battery module structural components: high thermal conductivity engineering plastics (such as thermally conductive nylon, thermally conductive PBT, etc.) manufactured through injection molding to produce battery module end plates, side plates, and brackets not only withstand mechanical loads during battery pack assembly but also conduct heat generated by cells through structural components to the cooling system, achieving integrated structural and thermal functionality. Third, battery pack housings: thermal conductive plastic housings protect battery modules from external impact while effectively dissipating heat generated during battery operation to the external environment, working in conjunction with liquid cooling or air cooling systems to achieve precise battery temperature control.

From industry application data, new energy vehicle battery packs adopting thermal conductive plastic solutions show a maximum operating temperature reduction of 5 to 8 degrees Celsius, battery module temperature uniformity improvement of over 30%, and battery cycle life extension of 15% to 25%. Meanwhile, thermal conductive plastics have a density only one-third to one-quarter that of aluminum alloy, and adopting thermal conductive plastics to replace metal structural components can reduce overall battery pack weight by 20% to 35%, having a direct and significant effect on improving new energy vehicle driving range.

Currently, major automotive manufacturers and battery suppliers worldwide are accelerating the adoption of thermal conductive plastics in battery thermal management systems. Leading domestic battery companies have already adopted thermal conductive plastic battery end plates and thermal interface adhesive solutions in multiple mass-production vehicle models, while international automakers are planning larger-scale thermal conductive plastic applications in next-generation pure electric platforms. With continued optimization of material formulations and advancement of manufacturing processes, the depth and breadth of thermal conductive plastic applications in new energy vehicle battery thermal management will continue to expand, providing solid material foundation for the high-quality development of the new energy vehicle industry.