Recently, in accordance with the "Standardization Law of the People's Republic of China" and the "Regulations on the Management of Group Standards" formulated by the Standardization Administration of China, the Hunan Battery Industry Association has approved and published the group standard "General Technical Conditions for Iron-Sulfur Flow Batteries."

The group standard "General Technical Conditions for Iron-Sulfur Flow Batteries" was formulated by Changsha Hechu New Material Technology Co., Ltd., Shenzhen Zhonghe Energy Storage Technology Co., Ltd., Central South University, Hunan Xiangdian Testing Technology Co., Ltd., Hunan Gengchi New Energy Technology Co., Ltd., and other units. It is numbered T/HNSDCHYXH 003-2024 and has been implemented since June 1, 2024. It is managed by the Hunan Battery Industry Association, with Changsha Hechu New Material Technology Co., Ltd. responsible for the interpretation of the specific technical content.

Iron-sulfur flow batteries were first reported by the Pacific Northwest National Laboratory in the United States in 2016. Dr. Xie Wei, the founder of Zhonghe Energy Storage, began to lead the development of sulfur-based flow battery products in the U.S. Department of Energy's R&D project in 2018. As the latest technological route in the flow battery field, iron-sulfur batteries have the advantage of the lowest electrolyte cost and have received widespread attention in recent years, with major global research institutes joining the research and development efforts. Zhonghe Energy Storage is one of the earliest companies to commercialize iron-sulfur batteries, with rapid industrial progress, planning to build the first engineering demonstration project in 2024 and to launch commercial products in 2025.

Features and Advantages:
- Low Cost: The electrolyte cost is one-tenth of that of vanadium electrolyte, the lowest among all flow battery technology routes;
- High Economy: The system installation cost is comparable to that of lithium batteries, and the lifetime cost per kWh is much lower than that of lithium batteries;
- Controllable Supply Chain: The raw materials for the electrolyte are produced in large quantities, with no pressure from resource limitations, and the price is stable and not prone to fluctuations;
- Pure Liquid System: Both the positive and negative electrodes are liquid flow electrolytes, with no risk of dendrite formation due to metal phase transformation;
- Stable Electrolyte: Inorganic salt electrolyte, with a stable structure and no risk of degradation.

Flow batteries are highly favored in the energy storage market due to their inherent safety and technological advantages. The mainstream flow battery technology in the current market is the all-vanadium flow battery. However, due to the high cost of vanadium, the cost of the electrolyte is also high, which hinders further reduction in the cost of flow energy storage. The electrolyte cost of iron-sulfur flow batteries is only 10% of that of vanadium electrolytes, perfectly solving the biggest pain point that restricts the large-scale implementation of flow batteries.

The commercialization of iron-sulfur flow batteries has the potential to reduce the lifetime cost per kWh of energy storage systems to 0.1 yuan/kWh. Coupled with the cost of wind and solar power generation, which is below 0.2 yuan/kWh, the combination will be equivalent to the cost of coal-fired power generation. The clean energy market will usher in a huge market opportunity for iron-sulfur flow batteries combined with wind and solar power generation to replace coal-fired power.

The announcement document is as follows:

Product Series：
全钒液流电池-储能系统/BMS
液流电池-电极/隔膜
LAB系列研发示范装置
储能系统度电成本计算器NeLCOS^®

Recently, in accordance with the "Standardization Law of the People's Republic of China" and the "Regulations on the Management of Group Standards" formulated by the Standardization Administration of China, the Hunan Battery Industry Association has approved and published the group standard "General Technical Conditions for Iron-Sulfur Flow Batteries."

The group standard "General Technical Conditions for Iron-Sulfur Flow Batteries" was formulated by Changsha Hechu New Material Technology Co., Ltd., Shenzhen Zhonghe Energy Storage Technology Co., Ltd., Central South University, Hunan Xiangdian Testing Technology Co., Ltd., Hunan Gengchi New Energy Technology Co., Ltd., and other units. It is numbered T/HNSDCHYXH 003-2024 and has been implemented since June 1, 2024. It is managed by the Hunan Battery Industry Association, with Changsha Hechu New Material Technology Co., Ltd. responsible for the interpretation of the specific technical content.

Iron-sulfur flow batteries were first reported by the Pacific Northwest National Laboratory in the United States in 2016. Dr. Xie Wei, the founder of Zhonghe Energy Storage, began to lead the development of sulfur-based flow battery products in the U.S. Department of Energy's R&D project in 2018. As the latest technological route in the flow battery field, iron-sulfur batteries have the advantage of the lowest electrolyte cost and have received widespread attention in recent years, with major global research institutes joining the research and development efforts. Zhonghe Energy Storage is one of the earliest companies to commercialize iron-sulfur batteries, with rapid industrial progress, planning to build the first engineering demonstration project in 2024 and to launch commercial products in 2025.

Features and Advantages:
- Low Cost: The electrolyte cost is one-tenth of that of vanadium electrolyte, the lowest among all flow battery technology routes;
- High Economy: The system installation cost is comparable to that of lithium batteries, and the lifetime cost per kWh is much lower than that of lithium batteries;
- Controllable Supply Chain: The raw materials for the electrolyte are produced in large quantities, with no pressure from resource limitations, and the price is stable and not prone to fluctuations;
- Pure Liquid System: Both the positive and negative electrodes are liquid flow electrolytes, with no risk of dendrite formation due to metal phase transformation;
- Stable Electrolyte: Inorganic salt electrolyte, with a stable structure and no risk of degradation.

Flow batteries are highly favored in the energy storage market due to their inherent safety and technological advantages. The mainstream flow battery technology in the current market is the all-vanadium flow battery. However, due to the high cost of vanadium, the cost of the electrolyte is also high, which hinders further reduction in the cost of flow energy storage. The electrolyte cost of iron-sulfur flow batteries is only 10% of that of vanadium electrolytes, perfectly solving the biggest pain point that restricts the large-scale implementation of flow batteries.

The commercialization of iron-sulfur flow batteries has the potential to reduce the lifetime cost per kWh of energy storage systems to 0.1 yuan/kWh. Coupled with the cost of wind and solar power generation, which is below 0.2 yuan/kWh, the combination will be equivalent to the cost of coal-fired power generation. The clean energy market will usher in a huge market opportunity for iron-sulfur flow batteries combined with wind and solar power generation to replace coal-fired power.

The announcement document is as follows:

Product Series：
全钒液流电池-储能系统/BMS
液流电池-电极/隔膜
LAB系列研发示范装置
储能系统度电成本计算器NeLCOS^®