본문 바로가기 주메뉴 바로가기

Technology

What’s XRB

XRB (eXpandable Redox Battery)?
XRB is the new RFB battery?

Expandable Redox Battery (XRB). Expandable means that it is possible to expand by attaching multiple cathodes and anodes of each unit cell consisting the stack, and also, depending on the battery usage as a Redox Battery Platform, it can be configured in a stack to perform charge/discharge operation like a lithium-ion battery or be used for long-duration ESS through an external electrolyte tank just like conventional flow batteries.

XRB’s unit cell structure is modular and expandable platform, enabling stack design and manufacturing for each rated voltage and energy capacity depending on the use.
Therefore, in large-capacity battery systems, XRB can reduce costs in the stack sector compared to the existing redox flow batteries’ multiple repetitive single-cell configuration.

VRFB
  • Fully scalable
  • Well developed structure
  • Low energy density
  • Complicated flow system
  • Expensive installing cost
XRB
  • Fully scalable
  • Well developed structure as a Redox Battery Platform
  • High energy density
  • No(SVRB) or less BOP required (Pump, Tank, Pipe, etc.)
  • Low install cost (Short delivery)
  • No(SVRB) or less pump power required (High energy efficiency)
XRB! Creating a new standard for rechargeable batteries.
01
In lithium-ion batteries, the cathode and anode materials are responsible for both energy output and capacity, but in flow batteries, the stack is responsible for the output, and the electrolyte that reacts between the electrodes and the separator membrane on both sides is responsible for the energy capacity. Lithium-ion batteries are optimal for small electronic devices and mobile devices due to their high energy density, but problems such as ignition, short lifespan, and supply and demand of raw materials always exist.
02
Existing flow batteries have advantages such as long life and stability, but they require BOP(Balance of Plant) facilities such as pump, electrolyte tank, piping, etc. in addition to the stack, which make flow batteries take up a lot of space, and have low energy efficiency. Therefore, we have developed a new type of redox flow battery that overcomes the limits and takes only the advantages.
03
In other words, BOP(Balance of Plant), which is used in the existing flow battery, is removed, and the stack alone can be operated while generating sufficient output and capacity with only the stack, so that the same advantages of the lithium-ion batteries can be used.
04
If the pump and electrolyte tank are connected in the conventional way, it can be used as a high-output, long-duration ESS. In this case, the same output can be produced even if the pressure and flow rate inside the stack are lowered to 1/3 or less, and the high-output stack structure reduces the stack cost by more than 50% and the energy consumption of external pumps by more than 60% compared to the conventional flow battery.
TOP