Qingdao LDC Technology Corp. has been dedicated to the development and research of industrial‑grade and nuclear‑grade power products for 26 years, providing stable, reliable, and high‑quality power supply solutions to traditional energy sectors such as electricity, petroleum, chemical engineering, and coal chemical engineering; emerging strategic industries including nuclear power and concentrated solar power; and other cutting‑edge fields like semiconductor manufacturing. To break foreign technology blockades, the company has consistently pursued independent innovation and in‑house R&D, collaborating closely with numerous universities and research institutions. As a result, it has successfully developed industrial‑grade uninterruptible power supplies that can rival those of European and American multinational brands, and—thanks to their exceptional reliability and cost‑effectiveness—has effectively dismantled the long‑standing market monopoly held by these Western brands.

Years of technological accumulation and refinement have yielded substantial achievements. The company has now become a leading manufacturer of industrial UPS power supplies in China, holding 180 intellectual property rights, including 7 registered trademarks, 16 invention patents (see the attached “Qingdao Edisen Patent Technology List”), 40 utility‑model patents, and 117 software copyrights. It is one of the most innovative technology enterprises in China’s industrial power‑supply sector, pioneering advancements in large‑capacity, intelligent, and multifunctional power‑supply systems, with certain key technologies at the forefront domestically.

The company has become the largest, leading high-tech enterprise in the industrial UPS power supply sector. It serves as the host institution for Qingdao’s Power Electronics Expert Workstation, the R&D Center of Qingdao’s Industrial Power Supply Enterprises, and the Technical Center of Qingdao’s Industrial Power Supply Enterprises. It is also a national science-and‑technology‑oriented SME, a member of the Yufan Program, a specialized, refined, distinctive, and innovative demonstration enterprise, a Qingdao renowned brand, and an “Invisible Champion” recognized by the Ministry of Industry and Information Technology.

Qingdao LDC Technology Corp. and the School of Automation at Qingdao University have maintained in-depth industry–university–research collaboration for many years, establishing the “Qingdao University–Qingdao LDC Collaborative Innovation Center” and the “Qingdao University Undergraduate Teaching Internship Base.” Together, they are advancing technological cooperation between the enterprise and the university, fostering mutual development in curriculum design and industrial integration, and achieving win-win outcomes through complementary strengths. In addition, Qingdao LDC Technology Corp. is currently in discussions with the School of Automation at China University of Petroleum and is poised to sign a technical cooperation agreement with the university.

Invention Patent Document – Patent Details List

8.1 Invention Patent: Zero-Voltage Switching System for High-Power Switching Transistors

8.2 Invention Patent: High-Capacity Power Module Connector

8.3 Invention Patent: Inverter with Heat Dissipation Redundancy Function

8.4 Invention Patent: A Multi-Static Combination UPS Power Supply for a Multi-Load Power Supply System

8.5 Invention Patent: Control Method for a Novel Static Switch

8.6 Invention Patent: A High-Frequency Resonant Lead-Acid Battery Repair Device and Method

8.7 Invention Patent: A High-Frequency Resonant Lead-Acid Battery Restoration System and Method

8.8 Invention Patent: A Feed-Back Energy‑Based Constant‑Current‑Value Positive/Negative Pulse Rapid Charging Device and Method

8.9 Invention Patent: A Method for Rapid Sampling and Regulation of Periodic Voltage or Current

8.10 Invention Patent: Power Generation Optimization System for Photovoltaic Power Plants

8.11 Invention Patent: Electric Vehicle Charging Device Capable of Being Installed Underground

8.12 Invention Patent: Power Optimization Box for Photovoltaic Power Stations

8.13 Invention Patent: A Method and System for Hydrogen Production via Seawater Electrolysis Based on Offshore Wind Power

8.14 Invention Patent: Intelligent Peak-Shaving and Valley-Filling Combined Photovoltaic Power Generation System and Method

8.15 Invention Patent: A Floating Offshore Wind-to-Hydrogen Generation Device

8.16 Invention Patent: Method, System, Device, and Storage Medium for Controlling an Uninterruptible Power Supply with Continuous Power Supply