Vanadium Redox Flow Battery

Your go-to source for Vanadium Redox Flow Battery products is Thinpack. great power density, great energy efficiency, a wide range of electrolyte operating temperatures, and a high level of modularization are all attributes of vanadium batteries. Compared to conventional lead-acid and lithium batteries, the life cycle cost is significantly cheaper.

It is the ideal option for electric vehicle fast charging, solar power generation, wind energy generation, smart grid, maximum use, communication base station, and backup power generation.

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Vanadium Redox Flow Battery Manufacturer in China

Thinpack Power focuses on high-performance perfluorinated ion membranes for vanadium batteries, high activity
electrode, high energy efficiency stack, wide temperature vanadium electrolyte, and vanadium battery system modularization

Vanadium Redox Flow Battery by Power

5KW Vanadium Redox Flow Battery
  • 5KWH Small Scale Vanadium Battery Energy Storage Requirement
  • Application includes residential solar battery storage
20KW Vanadium Redox Flow Energy Storage Container
  • Medium Scale Energy Storage Requirement 20KWH
  • The application includes parking lot, plant farm
50KW Vanadium Redox Flow Energy Storage Container
  • Big Industrial Scale Requirement Vanadium energy storage application
  • Factory use large energy storage system
3 Products Found.

1. Working Principal of Vanadium Redox Flow Battery

To achieve the mutual conversion of chemical energy and electrical energy, the vanadium battery flows between the electrodes. This takes place while conducting electrochemical reactions with vanadium electrolytes in various valence states.

A stack, vanadium electrolyte tank, circulation pump, pipeline, and battery management system make up a vanadium battery. Single cells linked in sequence make up the stack.

Two distinct tanks of vanadium electrolyte, each with a different charge, are joined to a main stack of fuel cells inside the VFB.  Pumped via the fuel cell stack, ion exchange takes place across a membrane as electrolyte from the tanks is passed through.  

A reversible electrochemical reaction results from this exchange, allowing electrical energy to be stored and then released. Vanadium may exist in four various states of oxidation (V2+, V3+, V4+, and V5+), each of which carries a distinct electrical charge, which is the basis for the technology.


Working principal of Vanadium battery
Working principle of Vanadium battery

Under the action of the circulating pump’s pressure, the barrel’s vanadium electrolyte flows into the stack through the flow channel of the primary liquid inlet.

After being evenly divided by the flow channel of the liquid inlet branch at the lower part of the liquid flow frame plate of the monolithic battery, it flows evenly through the micropore channel of the electrode of the monolithic battery from bottom to top for electrochemical reaction

After the reaction, the vanadium electrolyte flows out of the stack through the liquid outlet branch flow channel on the upper liquid flow frame plate of the single-chip battery. Then it flows back into the barrel through the main liquid outlet flow channel.

2. The Benefit of Vanadium Redox Flow Battery

There are some obvious reasons why customers go for the Vanadium Redox Flow Battery. Let’s take a look at those use benefits to understand why it’s so good.

2.1 Extensive Lifespan

The predicted lifespan of Vanadium flow batteries is 25 years or longer, and as was said in the preceding statement, there is no performance decline as the battery becomes older.

2.2 Easy to Maintain

Vanadium flow batteries found at Thinpack simplify maintenance. The Thinpack Battery Management System alerts them when service is necessary, allowing them to perform on-demand maintenance rather than scheduling routine maintenance whether it is necessary or not. 

2.3 Discharge Capacity 

Vanadium flow batteries never degrade or lose capacity over time, unlike lithium batteries, which discharge fully at 100% every time. It is thus simpler to match daily demands with generation because a vanadium flow battery retains 100% of its initial battery capacity throughout its entire lifespan. 

2.4 Safe to Use

When it comes to safety, lithium batteries have a number of severe drawbacks that vanadium flow batteries do not. Vanadium flow batteries have the highest level of safety as opposed to other types of batteries because their water-based electrolyte is neither flammable nor explosive.

2.5 Incredibly Versatile

Vanadium flow batteries provide adaptability in several different ways. They can be used in a variety of indoor and outdoor temperatures, and since they are still in the early stages of development, we anticipate that more advancements and improvements shall be produced as advances in technology occur. 

2.6 Sustainable Energy

In addition to enabling a more sustainable kind of energy, vanadium flow batteries themselves are environmentally friendly. It is not necessary to mine new vanadium to replace batteries because the electrolyte used in vanadium flow batteries may be recycled.

3. Comparison of Vanadium Redox Flow Battery with other batteries

Energy storage battery Super capacitor Lead-acid batteries lithium battery Sodium sulfur battery Vanadium battery
Specific energy (Wh/kg) 3~5 30~40 120~200 ~100 20~30
Energy efficiency (%) 85~95 70~80 90~95 75~80 75~80
Number of cycles (times) 50000 500 2000 1000 20000
Depth of discharge (%) >90 <70 >90 >90 100
Response time (ms) <1 <1 <1 <1 <1
environmental impact Low high medium medium Low
safety medium Low Low Low high
Price (USD/KWh) 800 80 200 500 350


4 Vanadium Redox Flow Battery Key Component Parameter

A collection of power cells with two electrolytes segregated by a proton exchange membrane make up a vanadium redox battery. A VRB cell uses carbon-based electrodes. Carbon felt, carbon paper, carbon cloth, graphite felt, and carbon nanotubes are the most prevalent varieties.

The two electrolytes are composed of vanadium. While V3+ and V2+ ions make up the electrolyte in the negative half-cells, VO2+ and VO2+ ions do so in the positive half-cells. Vanadium pentoxide (V2O5) and sulfuric acid (H2SO4) can be electrolytically dissolved to create the electrolytes, which is one method for making them. When used, the solution has a high acidity.

Below we take a detailed look at each component carefully.

4.1 VFB-5kW Vanadium battery stack

VFB-5kW Vanadium battery stack
VFB-5kW Vanadium battery stack
VFB-5kW Vanadium battery stack
Rated voltage 48VDC rated current 110ADC
rated power 5.3kW Rated energy efficiency 83%
Maximum power 20kW Operating temperature -30~60℃
Stack weight 130kg Stack size 63cm×75cm×35cm
Charging voltage limit 60VDC discharge limiting voltage 40VDC
cycle life 20000 times Storage life unlimited

4.2 Vanadium electrolyte

GEC-VES-1.5M vanadium electrolyte has a unique formula, high conductivity, high working temperature, no need for a heat exchanger, good stability, less migration of vanadium ions and little change in liquid level during charging and discharging, which solves the problem of positive and negative The balance problem and energy decay problem of negative electrode electrolyte is the best choice for vanadium battery!

GEC-VES-1.5M Vanadium electrolyte
GEC-VES-1.5M Vanadium electrolyte
GEC-VES-1.5M Vanadium electrolyte
concentration 1.5M V (V/III) density 1.3gcm’
Energy Density 20kWh/m’ specific energy 15kWh/t
Charging voltage limit 1.65VDC/Cell discharge limiting voltage 1.0vDC/Cell
Operating temperature -30~60°℃ service life unlimited


4.3 Perfluorinated membrane

GEC-IEM-10N perfluorinated ion exchange membrane has a high acid capacity, high conductivity, high crystallinity,
A series of advantages such as high tensile strength, small linear expansion rate, isotropy, and long life
It is an ideal choice for core materials of vanadium batteries, flow batteries, fuel cells, ion membrane electrolyzers, and electrochemical sensors!

GEC-IEM-10N Perfluorinated membrane
GEC-IEM-10N Perfluorinated membrane
thickness N mil (N=1-7) 1mil 0.0254mm
equivalent 1000g/eq acid capacity 1.0meq/g
Conductivity 0.1S/cm density 2.0gcm’
Tensile Strength 38MPa isotropic linear expansion rate 4% isotropic
service life >100000h Storage life unlimited

Applications of Vanadium Redox Flow Battery 

Vanadium batteries are primarily utilized for grid energy storage, i.e., attached to power plants/electrical grids, for a number of reasons, including their relative bulkiness. The high potential capacity of VRFB might be the most effective way to smooth out the erratic output of utility-scale wind and solar installations.

They may be suitable in applications requiring long-term energy storage with minimal maintenance, such as in military equipment, where they are used as sensor components, thanks to their low self-discharge.

They can take the role of lead-acid batteries or diesel generators because of their quick response times, which make them well-suited for uninterruptible power supply (UPS) applications. Frequency regulation benefits from quick responses as well. Because of these features, VRBFs are a good “all-in-one” solution for load shifting, frequency regulation, and microgrids.


Vanadium batteries will make it possible to use electricity more effectively by improving the match between supply and demand. As a result, both conventional generation using fossil fuels and nuclear power, as well as renewable energy like solar and wind, will operate more effectively and efficiently.

The market for stationary energy storage is expanding quickly due to the increased use of renewable energy sources. Vanadium flow batteries are anticipated to play a bigger part in these applications over the next few decades based on the benefits mentioned above. 

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