Cooling Sheet for Photovoltaic Modules Using Super-Absorbent Polymer

The cooling function is merged into the backsheet itself by integrating a cooling layer containing phase change material and heat dissipation fins directly into the backsheet structure. This eliminates the need for separate cooling pins and their associated mounting hardware, thereby reducing material cost and installation complexity while maintaining effective heat dissipation.

The backsheet is transformed into a multi-functional component that simultaneously provides structural support, weather protection, and active cooling functions. The cooling layer with phase change material absorbs heat during phase transition, while the heat dissipation fins conduct and radiate heat away from the photovoltaic module, making the backsheet a universal solution for both protection and thermal management.

The phase change material in the cooling layer is positioned to preemptively absorb heat as it accumulates during sunlight absorption. By utilizing the phase change transition (solid to liquid) of the material, heat is absorbed before it can significantly raise the temperature of the photovoltaic cells, thereby maintaining efficiency while allowing full sunlight absorption.

The cooling layer utilizes phase transition of the phase change material (e.g., from solid to liquid) as a heat absorption mechanism. During the phase transition, the material absorbs latent heat from the photovoltaic module without significant temperature increase, effectively decoupling heat absorption from temperature rise and allowing continuous high-efficiency power generation.