The package is usually made of 10# steel material, but can also be kovar alloy material. This type of packaging package products use stable and reliable integrated brazing and glass melt sealing technology. The lead adopts anaerobic copper solid structure, and the current carrying performance of a single lead is greater than 200A. The cover plate adopts the step cover structure, but the reinforced cover design can also be adopted according to the actual assembly requirements to meet the different sealing processes such as parallel seam welding and laser welding.