Among major energy storage technologies, all-vanadium flow battery has its outstanding advantages, such as intrinsic safety, ultra-long life, high productivity, environmental friendliness, and 100% life cycle capacity maintenance, which led its one of the preferred technologies to achieve large-scale and efficient energy storage.
The reactor is the main core component of all-vanadium flow battery system, and its power density determines the cost of the reactor. The higher the power density with the smaller the volume of the stack cause its the lower the cost under the same output power condition.
The research team has just developed one monomer stack of 70kW class high power density all-vanadium flow battery recently. The bulk power density of the single reactor is increased from the 70 Kw/m3 to 130 Kw/m3, and the power is increased from 30 KW to 70kW under the condition that the volume remains unchanged, and the cost is reduced by 40% compared with the current 30kW class reactor, which is expected to accelerate the pace of the commercialization process of all-vanadium flow batteries.
In order to further increase the battery power density and reliability, the R&D team engaged in depth research on key materials, core components of the reactor and the system, and achieved breakthrough of the core technology of a new generation of all-vanadium flow batteries. It is believed that the integrated design and application of the new weldable reactor are at leading level internationally.

The research team adopted a new generation of highly selective weldable porous composite film and weldable highly conductive bipolar plate independently developed, using its weldable characteristics to develop a short process, ultra-thin battery structure, and combined with the structural design of low flow resistance and high uniform distribution of flow channels to develop a 70kW reactor. The test results show that the energy efficiency of the reactor is 81.0% under the condition of 70kW rated power charging and discharging. The energy efficiency is 82.1% under the condition of 60kW constant power charge and discharge. In addition, after more than 1200 cycles of continuous and stable operation, the energy efficiency decay rate of the reactor is only 1.7%. Using the reactor, a 20-foot 250kW energy storage unit module can be upgraded to 500kW energy storage unit module, which not only greatly reduces the volume of the power unit, but also reduces the cost of the system supporting facilities. The development of the stack improves the integration of the power unit of the energy storage system, and greatly improves the economy and reliability of the energy storage system.
Based on this technology, the professional team carried out a series of application tests of 5-10 Kw/20-30 Kwh, and 100 Kwh distributed energy storage system, there have been also implemented more than 20 commercial application demonstration projects at home and abroad, including the largest 100MW/400MWh vanadium flow battery energy storage for peak loading power station demonstration project,which has been giving important support for global commercial application promotion and for the construction of a new global power system.

Application fields: 
1. For new energy consumption: improve intermittent power supply access performance, smooth output power fluctuations, improve output quality, improve the scheduling of intermittent power supply;
2. For power grid: improve the "compatibility" of the power grid to the intermittent power supply, and enrich the means of peak regulation and frequency modulation;
3. For household: the user can use the battery to charge when the grid load is small, and when the power grid load is large, the use of batteries for power supply can greatly reduce the power grid load, save power cost, optimize power supply reliability, and improve power quality.
4. For industry: improve the power quality of steel, cement, chemical and other industrial fields, as an important means of system reactive power compensation to stabilize the grid voltage, or valley power peak use, save electricity costs;
5. For Microgrid: provide support for the off-grid operation of industrial parks and islands, and establish intelligent
and reliable local power grids;
6. For backup power supply: large UPS power supply, as a backup power supply for important loads such as national defense, island, important computer rooms, and communication signal towers.

Reported by Mr. Tony Gao