Lithium Battery

200MW/800MWh! China's Largest Semi-Solid-State Energy Storage Project Connected to the Grid

Source: CCTV News

According to a report by CCTV News on December 1, China Green Development Group announced that a 200MW/800MWh semi-solid-state battery energy storage project located in Wuhai, Inner Mongolia, has been successfully connected to the grid. The project not only sets a new record for the installed capacity of grid-connected semi-solid-state lithium battery energy storage in China, but also marks a crucial step for China's semi-solid-state energy storage technology from pilot demonstration to large-scale commercial operation.

As a major new energy hub in northwest China, Wuhai city in the Inner Mongolia Autonomous Region, has leveraged its abundant wind and solar resources to consistently advance integrated development of “source-grid-load-storage” in recent years. This newly grid-connected energy storage facility serves as a core infrastructure project for enhancing local renewable energy consumption. Covering an area of about 100 mu (about 6.67 hectares), the project is equipped with 160 energy storage battery containers and 40 converter and booster integrated units.

Semi-Solid-State Lithium Battery Energy Storage Project Successfully Connected to the Grid in Wuhai, Inner Mongolia

Qin Lei, Project Manager of Wuhai Energy Storage Project, Inner Mongolia Branch, China Green Development Group:

“This massive ‘power bank’ utilizes domestically-developed semi-solid-state lithium iron phosphate battery technology, which offers significant advantages in safety performance, energy density, and cycle life compared with conventional liquid lithium iron phosphate batteries.”

With the rapid upgrade of the new energy industry, energy storage - essential for grid peak regulation, frequency modulation, and improving renewable energy utilization - is entering a phase of large-scale expansion. Semi-solid-state lithium battery technology represents a key direction for the future development of power and storage batteries. Using a hybrid solid-liquid electrolyte, semi-solid-state batteries retain the high ionic conductivity of liquid systems while achieving a cycle life exceeding 12,000 cycles, which greatly reduces lifecycle operational costs. In addition, they can effectively suppress lithium dendrite growth, further enhancing safety.

Semi-Solid-State Lithium Battery Energy Storage Project Successfully Connected to the Grid in Wuhai, Inner Mongolia

Liu Xiaofei, Assistant General Manager, Inner Mongolia Branch, China Green Development Group:

“Once fully operational, the project will feature a peak-shaving and frequency-regulating capability of 200MW/800MWh, providing 189,000 MWh of clean electricity to the grid annually. It enables flexible scheduling - storing energy during the day and supporting peak loads at night - significantly enhancing power system stability. It will also ensure that local green electricity can be fully delivered, stably transmitted, and efficiently utilized, solving key bottlenecks in regional renewable energy consumption.”

Semi-Solid-State Lithium Battery Energy Storage Project Successfully Connected to the Grid in Wuhai, Inner Mongolia

In recent years, semi-solid-state lithium batteries - offering both high safety and strong economic performance - have become a core direction of technological evolution in the energy storage sector. Previously, China's largest grid-connected semi-solid-state storage project had a capacity of 100MW/200MWh. The Wuhai project doubles that scale, demonstrating that China is now at the global forefront of large-scale applications of semi-solid-state energy storage technology.

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3,200 MWh New Energy Storage Projects Reach Key Milestones

Source: CNESA

Recently, multiple new energy storage projects across China have reached important milestones. In Shandong, Xinjiang, Hebei, Qinghai, and Inner Mongolia, several 100-MW-level projects have either started construction or successfully connected to the grid. Technologies involved include flywheel storage, lithium iron phosphate (LFP) batteries, hydrogen storage, and more - together painting a rapidly emerging panorama of diversified and large-scale storage development.

Breakthrough in Grid Frequency Regulation: World's First 100-MW

Flywheel Storage Demonstration Project Commissioned

The world's first 100-MW independent flywheel frequency-regulation demonstration plant - the Boding Energy 100 MW Vacuum Magnetic Suspension Flywheel Independent Frequency Regulation Project (Phase I) - has officially been commissioned in Rushan, Weihai, Shandong. Sungrow's energy storage PCS integrated system introduced multiple hardware and software innovations tailored for flywheel storage, achieving key breakthroughs in response speed and operational reliability, and setting a new benchmark for frequency-regulation applications.

Phase I of the Rushan Bodin flywheel project was grid-connected in July, and Phase II has already been included in Shandong's 2025 New Energy Storage Demonstration Program. The project's successful commissioning verifies Sungrow's PCS stability and rapid system response in flywheel-based frequency regulation, enhances overall operational efficiency, and lays a strong foundation for large-scale deployment of flywheel energy storage in grid applications.

 

CGN's 200 MW / 800 MWh Independent Energy Storage Project in

Lop County, Xinjiang Breaks Ground

On November 16, CGN (China General Nuclear Power Group Co., Ltd.)'s 200 MW / 800 MWh independent energy storage project in Lop County, Hotan Prefecture, Xinjiang officially started construction. Located about 20 km from Luopu County, the project is invested in and developed by CGN New Energy Lop Co., Ltd., and constructed by China Energy Engineering Xinjiang Electric Power Construction Co., Ltd.. The project will build a centralized electrochemical storage station with a planned total capacity of 200 MW / 800 MWh.

 

Hebei Zhuozhou 200 MW / 800 MWh Independent Energy Storage

Project Starts Construction

On November 18, construction officially began on the 200 MW / 800 MWh independent energy storage station in Zhuozhou, Hebei. As a key pilot project supported by Hebei Province, it carries a total investment of over 1 billion RMB. Jointly developed by DURIA TECH, CORUN, CALB, and Guoxia Technology, the project establishes a full-chain closed-loop system from upstream materials to mid-stream equipment and downstream operations - advancing integrated “project development + supply chain security + full-cycle services.”

The project adopts a hybrid “lithium iron phosphate + nickel-metal hydride” storage technology route. Once completed, it will significantly enhance peak-shaving and frequency-regulation capability for the Beijing-Tianjin-Hebei grid, supporting efficient renewable-energy consumption and improving grid safety and stability.

 

150 MW / 600 MWh: SPIC Qinghai Haixi Grid-Side Storage Project

Breaks Ground

On November 13, Huanghe Hydropower Development Co., Ltd. Under the SPIC (State Power Investment Corporation Ltd.) held a groundbreaking ceremony for the Qinghai Haixi Tuosu grid-side electrochemical storage project at the Yixuan PV power station. The project is part of the supporting storage facilities for the first phase of the company's 2.2 GW multi-energy complementary project in Delingha. With a planned capacity of 150 MW / 600 MWh, the station will significantly enhance the grid's peak-shaving ability and its capability to absorb PV and other renewable generation.

The project includes a 100 MW / 400 MWh centralized storage system and a 50 MW / 200 MWh high-voltage cascaded storage system, both designed to provide reliable power support during peak demand periods.

 

300 MW / 600 MWh: Xinjiang's First Immersed Energy Storage

System Commissioned

On November 9, the energy storage project invested by Xinjiang Weilan New Energy Technology Development Co., Ltd. - the first large-scale electrochemical energy storage station in the Xinjiang Production and Construction Corps (XPCC) and the first immersed energy storage system in Xinjiang - successfully completed all equipment commissioning and was energized and put into operation.

The project turns “technological firsts” into “industry benchmarks,” adopting a mature immersed-system design paired with high-safety LFP batteries. As Xinjiang's first immersed-system energy storage project, it can control battery operating temperature differences within ≤2 °C. Combined with its large 300 MW / 600 MWh configuration, the project fills the technical gap for large-scale electrochemical storage within the XPCC.

 

100 MW / 400 MWh: Independent Grid-Side Storage Demonstration

Project in Huade, Ulaanqab (Inner Mongolia) Successfully Connected

On November 13, the electrochemical portion of the Huade County grid-side independent energy storage demonstration project in Ulaanqab, Inner Mongolia, was successfully connected to the grid. The project includes a total planned capacity of 100 MW / 400 MWh, adopting a hybrid “electrochemical + hydrogen storage” configuration:

Electrochemical storage: 90 MW / 360 MWh, providing second-level frequency regulation and short-term peak-shaving;

Hydrogen storage: 10 MW / 40 MWh, serving long-duration storage (scheduled for completion and grid connection in 2026).

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107.12 MW / 428.48 MWh! China’s Largest User-Side Energy Storage Project Expected to Be Completed by Late November

Source: Guangyuan Economic and Technological Development Zone

Recently, construction of China’s largest user-side energy storage project - the 107.12 MW / 428.48 MWh Guangyuan Zhongfu & Guangyuan Linfeng User-Side Lithium Battery Energy Storage Project in Sichuan Province - has entered its final phase. Since construction began on July 30, 2025, all work has proceeded steadily according to plan, with full efforts now focused on achieving the completion target of November 30.

The project is jointly developed by Great Power, a leading company in the energy storage industry, and Henan Zhongfu High Precision Aluminum Co., Ltd (Zhongfu Aluminum), a top enterprise in the aluminum sector. Located only 210 meters from Zhongfu Aluminum’s plant, the project directly connects to the 10 kV power distribution system, significantly reducing transmission losses and improving energy efficiency. It is linked via cables to two 220 kV substations in the industrial park and operates on a “charging during off-peak, discharging during peak” model, with a maximum charge/discharge power of 107 MW and a total capacity of 428.48 MWh, allowing for 4 hours of full charge and discharge per cycle.

Once operational, the project will not only reduce electricity costs and enhance power reliability for Zhongfu Aluminum, but also help the power grid with peak shaving and load balancing. According to plans, Phase II of the project construction will expand the system to 400 MW / 1,000 MWh, along with the construction of a new 220 kV substation, wind and solar power facilities, and EV charging stations. Ultimately, the project aims to establish an integrated “generation - grid - load - storage - charging” regional microgrid in Guangyuan, Sichuan province, providing a practical model for China’s power market reform and carbon neutrality goals, while injecting green momentum into the city’s economic and social development.

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Read more: https://en.cnesa.org/new-events-1/2026/4/1/apr-1-apr3-the-14th-energy-storage-international-exhibition-amp-expo

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