Given the great development of renewable energy and its intermittent essence, it is necessary to guarantee a stable and quality supply, for which it is essential to install efficient energy storage systems that compensate for the intermittency of solar, wind and other renewable production.
The use of batteries is growing exponentially for the creation of isolated grids or connected with intermittent renewables, as well as to provide quality and lower supply prices to the grids.
The electrolyte is aqueous
and inherently safe and
non-flammable, so the battery
does not ignite or explode.
It also does not emit gases
Automatic operation and
All operating components
(tanks, electrolyte, pumps,
electrode stack, etc.) are
recyclable and reusable.
TECHNICAL PARAMETERS OF
THE AM-VFB-5kW / 30kWh BATTERY
|Rated voltage||48 VDC|
|Rated power||5 kM|
|Nominal energy||30 kMh|
|Nominal energy efficiency||78%|
|Electrolyte weight||2,2 t|
|Electrolyte||1.5 M V (IV/III)|
|Charge limit voltage||60 VDC|
|Lifecycles||more than 20000 cycles|
|Nominal intensity||105 A|
|Nominal time||6 h|
|Rated capacity||630 Ah|
|Maximum power||20 kW|
|Stacked size||63 cm x
75 cm x
|Battery size||2.0 m x
1.2 m x
|Electrolyte volume||1.6 ㎡|
|Work temperature||-30cº to +60ºC|
|Discharge limit voltage||40 VDC|
VANADIUM FLOW BATTERIES
Vanadium flow batteries perform the conversion between
electrochemical energy and electrical energy through the
electrochemical reaction of vanadium electrolytes of different
valences + 2, + 3, + 4, + 5 that circulate in contact with the
The electrochemical reaction, the standard electrode potential,
and the standard electromotive force are as follows:
· Negative: V2+ – e = V3+ E0 = -0.25V （1）
· Positive: VO ++2H++e = VO2++H2O E0 = 1.00V （2）
· Reaction: V2++VO2++2H+ = V3++VO2++H2O E0 = 1.25V （3）
A vanadium redox flow battery (VRFB) has two separate
tanks, one containing a positive and one negative electrolyte.
Both electrolytes consist of the element vanadium dissolved
in sulfuric acid, and vanadium occurs in different oxidation
The battery also has several cells. Each of these cells is
divided into two chambers separated by a membrane,
through which the ions pass. In one chamber there is
a positive electrode and in another a negative one.
The two electrolytes are pumped to either side of the
Current from the solar panels is fed to the cell electrodes,
where it moves electrons from positive to negative
electrolyte, charging the battery as liquid flows back into
the tank. During the download, this process is reversed.