A metal with many advantages
Vanadium, a relatively soft metal also used as an alloy component in the steel industry, plays a key role at CellCube. Vanadium pentoxide (V2O5) is utilized as a cathode in our long-term energy storage systems and includes 56% vanadium by weight.
Vanadium is mainly produced in China, followed by Russia, India, South Africa and Brazil. Although rising, its use in long-term energy storage systems still only represents a fraction of global demand for vanadium.
Find out more about the many advantages of vanadium here.
How the CellCube system works
Every CellCube energy storage system is comprised of two system components: an energy unit (container with electrolyte solution) and a power unit (container with stacks).
The vanadium redox flow battery is an electrochemical battery using the vanadium connections in a liquid electrolyte as the active material for storing energy. The liquid electrolyte is found in the tanks of the energy unit and is pumped from there through the electrochemical cells (the stacks). Electrochemical reactions cause electrons to move between the vanadium ions at different charging states. This causes chemical energy to be converted to electrical energy (discharge) or electrical energy to be converted to chemical energy (charge).
Other components of the CellCube system include the battery management system (BMS), the temperature management system as well as pumps and sensors which guarantee that the DC energy storage system operates safely and reliably.
Power or energy?
You don’t have to choose one or the other. This technology allows you to supply both power and energy — particularly advantageous when high cycle stability and discharging over the course of several hours are required.