vanadium-flow batteries: the energy storage breakthrough we've needed - electrical energy storage systems

Latest and most practical
The scale battery storage technology emerging in the market is vanadium oxide recovery battery, also known as vanadium flow battery. V-
The mobile battery is fully container-based, non-flammable, compact and available in half
Cycle indefinitely and drain 100% of the stored energy without degradation for more than 20 years.
Most batteries use two chemicals that change the price (
Or the state of charge or oxidation and reduction)
The response converts the chemical energy into an electronic stream of electrical energy and vice versa. V-
The flow cell uses only a variety of valence states of vanadium to store and release charges.
V can exist as several ions with different charges in solution, V (2+,3+,4+,5+)
, There are different numbers of electrons around each nucleus.
Less electrons generate a higher positive charge.
By providing electronic V (2+,3+)
Energy Forms V by losing electrons (4+,5+).
The mobile battery consists of two cans of liquid, which will be kept there all the time when needed.
When pumped into the reactor, the two solutions flow through the adjacent membrane and pass back to the moving electrons during charging and discharging to generate charge.
This type of battery can provide almost unlimited energy capacity with only a larger electrolyte storage tank.
It can be fully discharged for a long time without adverse effects and is simpler to maintain than other batteries.
Thanks to these unique features, the new V-
The mobile battery reduces the storage cost to about 5 kWh/kWh.
These batteries are quite large and best suited for industrial and utility scale applications.
Electric cars can never be installed, so Tesla batteries are safe at the moment. But the V-
The flow of the battery exceeds Li-
Ion and any other solid battery for utility-
Scale applications.
They're just safer, more scalable, and longer-
Long lasting and cheap
The cost per kilowatt hour is less than half.
In our new energy future, new battery technology is essential.
According to US media reportsS.
Energy storage monitoring, especially on the scale of business and utilities, energy storage demand will grow tenfold in the next five years, and the extension of the federal investment tax credit has greatly promoted (ITC)
Five years later.
The Energy Storage Association said that in 2016 alone, the company's investment in energy storage reached $0. 66 billion.
Joint Energy Technology (UET)
The largest MW in Seattle-
Using molecules developed at the Pacific Northwest National Laboratory, vanadium flow batteries can also be expanded.
The breakthrough of PNNL is to introduce hydrochloric acid into the electrolyte solution, almost doubling the storage capacity and making the system work in a larger temperature range, from-40°C to 50°C (-40°F to 122°F)
, Eliminating the large cost of previous maintenance temperature control.
Currently, the largest V-installed-
Mobile batteries in the United StatesS.
Is UET 2 MW/8MWh (
Power for one full charge/Total non-rechargeable energy)
Washington state system located at Everett substation, Snohomish County Utility District.
This vanadium battery can maintain 8 hours of lighting in 1,000 homes. AV-
The flow battery system planned by Rongke, Dalian Chinaby UET sister company, will soon become the world's largest battery with a capacity of 200 MW/800MWh. “Cost-
Effective, reliable, longer
In order to truly modernize the power grid, real-time energy storage is necessary . "
Imre Gyuk, energy storage project manager, Department of Energy Power Delivery and Energy Reliability office, UET systems. “As third-
Generating vanadium-stream batteries to gain market share, improving our understanding and optimization of storage value is critical to accelerating utility adoption of integrated storage and renewable energy solutions.
"Energy storage is usually very expensive no matter how you cut it.
No matter how good a regular battery is, the cost of storing 1 kWhr is about 30 cents, basically three times the cost of producing this energy.
For logistical reasons, storage is mainly carried out when necessary, such as storing solar energy generated on the same day for use in remote areas that night.
Or when you want to not drag a flashlight --
There are foot ropes around.
No one would have thought that this electricity bill was ridiculously high because it usually costs so little to power a flashlight or a remote device.
You will get 20 hours of continuous use from the normal battery, more or less.
But with the development of power generation, it becomes more and more important to store energy for the future, and we need to be more creative and cost less than we have so far.
So the importance of V-flow batteries.
In addition to batteries, there are other technologies for storing intermittent energy, such as thermal energy storage.
However, the most widely used storage method is pumped storage, which uses excess power to pump water into the reservoir behind the dam.
Later, when the demand for energy is high, electricity is generated by releasing stored water through turbines in the dam.
At present, 99% of power grid storage uses pumped storage, but the deployment location of pumped storage is limited by geology and environment. For now, V-
The mobile battery provides the best deployed large battery storage technology developed so far.