Sou Hu Cai Jing·2026-01-23 05:04Group 1 - China National Petroleum Corporation (CNPC) has obtained a patent for a "DC feedback power device driving system, power device, and charging pile," with the authorization announcement number CN223829233U, and the application date is December 2024 [1] - The patent falls under the field of power electronics technology and provides a system that includes a controller and multiple driving circuits connected to the controller, each driving circuit connected to different feedback load devices' power switches [1] - The system is designed to meet the driving requirements of multiple feedback load devices when using a backup method [1] Group 2 - China National Petroleum Corporation was established in 1990 and is based in Beijing, primarily engaged in oil and natural gas extraction [1] - The company has a registered capital of 48,690 million RMB and has invested in 107 enterprises, participated in 5,000 bidding projects, and holds 1,441 trademark records and 5,000 patent records [1] - China Petroleum Group Jichai Power Co., Ltd. was established in 1991 and is located in Jinan, primarily engaged in general equipment manufacturing [2] - The company has a registered capital of 576,639.524447 million RMB, has invested in 6 enterprises, participated in 2,212 bidding projects, and holds 66 trademark records and 259 patent records [2]