The upper cover of the blister battery pack is to replace the latest process mode of the upper cover of metal products, the material is lighter, thinner, the cost is better, and it meets the requirements of lightweight, and the use of thick film blister process can reduce the research and development cost from the development progress, mold cost, processing cost and development cycle, the model is more flexible, the process is more convenient, and the selection of different materials can solve the conditions required for the electrical performance of the upper cover at one time, and the surface does not need to be coated twice.