Lithium battery is the development trend of DC. Because of the instability of lithium battery, the product in work is dangerous, so the circuit board of power lithium battery is very important. Stable and affordable circuit board is the main competitive project of current products. The heat sink of the new type radiator is made of two thin aluminum plates by cold welding. Because the medium must pass through the middle, it is necessary to ensure that the welding position has no welding defects, otherwise it will leak. The company's customers are mainly foreign-funded enterprises and have high requirements for motor stamping. They need better motor stamping and iron core manufacturing technology than muffler dripping, as well as the design technology of motor mold and tooling. This project is the circular connector assembly of smart antenna power supply and signal control circuit for TD-SCDMA third generation mobile communication system (3G) designed and developed by Changzhou New Oriental Cable Co., Ltd. with the approaching of 3G, all major operators have entered into active practical preparation, and China Mobile has also started bidding for tens of billions of TD-SCDMA equipment. As the supplier of Alcatel lucent Shanghai Bell, the products have passed the test and trial operation of Alcatel lucent Shanghai Bell, and all performance indexes meet the design and application requirements.