Inner Mongolia Energy Group's 400MW/1600MWh Independent Energy Storage Project in Dengkou County Successfully Connected to Grid

On December 12, Inner Mongolia Energy Group's 400MW/1600MWh independent energy storage project in Dengkou County was successfully connected to the grid. On the same day, the first batch of energy storage units completed charging and discharging. The project adopts a hybrid battery technology route combining "vanadium redox flow + lithium iron phosphate," offering both long-duration energy storage and rapid response capabilities.

As a key technological demonstration project under Inner Mongolia Autonomous Region's "unveiling and leading" initiative, the vanadium redox flow battery system aims to establish a coupling theory of heat-mass transfer and electrochemical reactions based on flow batteries. It also involves developing new carbon fiber electrodes, graphite bipolar plates, and high-activity, wide-temperature-range electrolytes. The system achieves an energy efficiency of 80% at a rated current density of 500mA/cm² for single cells, with overall system energy efficiency exceeding 72%, providing critical guidance for rational flow battery design.

From commencement to completion, the project took just over two months for main construction and grid-connection debugging. The entire process—from obtaining all approvals to full operation—was completed in 139 days, while the period from formal construction start to grid-connected charging/discharging took only 80 days. Upon completion, the Dengkou Energy Storage Station's total capacity reaches 1,005MW/3,010MWh.

Energy storage stations possess dual attributes as both load and power sources. They not only balance peak and off-peak demand to support grid stability but also enhance renewable energy absorption and improve wind-solar utilization rates, serving as a critical component for integrating power generation, consumption, industry, and grid development.

Notably, Inner Mongolia Energy New Energy Company has already built 4,450MW of photovoltaic projects in Dengkou County. The operational 400MW/1600MWh independent energy storage project will significantly boost regional renewable energy absorption capacity and power system stability. It will create greater development space for desertification control and wind-solar hybrid projects while providing key support and demonstration value for the autonomous region's "integrated source-grid-load-storage new power system."