Recently, the 32.15kW iron-chromium flow battery stack, boasting the world’s largest single-unit power, has officially rolled off the production line at Langxiong Energy Storage Industrial Park in Taoyuan Town. These “energy cubes” have moved from laboratories to the forefront of the industry, injecting inexhaustible momentum into the new-type power system. According to the plan, the industrial park will also build China’s largest iron-chromium flow battery production base with the highest production capacity and automation level within two years.
At present, new energy sources such as wind power and photovoltaics are developing rapidly, but their intermittent nature poses challenges to grid stability. As a key to solving this problem, long-duration and high-power energy storage technology has become a strategic core supporting the construction of new-type power systems, directly affecting the large-scale grid-connection capability of new energy.
Iron-chromium flow batteries, with the inherent safety of aqueous electrolytes, over 15,000-cycle lifespan, wide temperature adaptability from -20℃ to 70℃, and the advantage of scaled cost as low as 0.1 yuan per kWh, have become an ideal solution for new-type power systems. “This technology is of strategic significance for realizing green energy transition and ensuring energy security,” said Shi Lei, CEO of Jiangsu Langxiong Energy Technology Co., Ltd. The 32.15kW battery stack independently developed by Langxiong Energy is currently the world’s most powerful single battery stack, weighing 2.5 tons.
Shi Lei showed reporters a 260kW high-density module integrated by 8 units. “This is the largest power module in China currently,” he explained. “These modular ‘super batteries’ can be flexibly assembled like Lego blocks, enabling the rapid construction of megawatt-level energy storage power stations.”
All these industry-leading products originate from Langxiong Energy Storage Industrial Park in Taoyuan Town, Wujiang.
With a total investment of 320 million yuan and covering an area of 26 mu (about 17,333 square meters), the industrial park has built two high-standard workshops with a total area of 33,000 square meters. On-site, reporters saw that two semi-automated production lines in the battery stack assembly workshop were operating in an orderly manner, with lifting platforms, truss manipulators and other components operating precisely.
Strict process requirements have created a unique workshop environment: the 4,800-square-meter assembly workshop is spotless, with full-area constant temperature maintained through over 60 air conditioning outlets above the workshop. “Such conditions are determined by the production process and material characteristics,” Shi Lei elaborated. “After the battery stacks are produced, they will be sent to the workshop on the second floor for electrical performance testing, followed by power module assembly.”
“Langxiong Energy has pioneered two semi-automated production lines for iron-chromium flow batteries in China. By the end of 2025, the annual production capacity of these two lines will reach 50MW,” Shi Lei told reporters, adding that the blueprint for Langxiong Energy Storage Industrial Park is even more ambitious. The first phase of the industrial park will achieve an annual output of 100MW battery stacks, and the second phase will put into operation fully automated production lines with gigawatt (GW)-level capacity. Currently, China’s first fully automated production line for iron-chromium flow batteries is under accelerated construction.
“After the fully automated production lines are put into operation by the end of 2026, the total annual production capacity will reach 300-400MW, making this the largest iron-chromium flow battery production base in China with the highest automation level,” Shi Lei said confidently.
Langxiong Energy settled in Taoyuan Town not only because of the local provision of factory facilities with large area and strong load-bearing capacity, but also due to its location advantage in the Yangtze River Delta Integration Demonstration Zone and convenient transportation conditions. As a leader in the iron-chromium flow battery industry and the “chain leader” of the industrial chain, Langxiong Energy’s settlement is expected to attract a number of upstream and downstream enterprises to gather here.
Now, Langxiong Energy is taking the industrial park and its “R&D-production-application” operation model as a blueprint to replicate and promote this industrial ecosystem nationwide. In terms of application demonstration, the 4MW/32MWh energy storage demonstration power station of Langxiong Energy in Taoyuan, Wujiang has entered the critical stage of construction and is expected to be put into use next year.
Shi Lei introduced: “As a micro-grid demonstration project of the industrial park, this project will optimize the park’s power distribution and energy structure through a unified energy management system, reduce carbon emissions, and ease the pressure during peak electricity consumption.” Previously, the 30kW/120kWh user-side project implemented in Haizhou, Suzhou has successfully verified its reliability. In the future, Langxiong Energy will continue to deepen its efforts in long-duration and safe iron-chromium flow battery energy storage technology, and take the lead in applying this technology to various scenarios such as new energy power generation, grid-side peak shaving, and distributed energy storage.
