Jump to content

Flow battery storage


Anders Lundberg

Recommended Posts

  • 2 weeks later...

Hello Martin,

I have received product data from Blusky Energy, which by the way is a saltwater battery and not a flow battery.

The following is the battery data:

  • Cell Voltage = 1,5V
  • No of Cells in serial = 32
  • Internal resistance = approx. 350mOhm
  • Self-Discharge = 3%
  • DOD @ 80% = 5500

 Discharge Table:

  • 10 hours = approx. 53,1Ah (discharge current = ~5A)
  • 5 hours = approx. 46,6Ah (discharge current = ~9,2A)
  • 1 hours and less not possible (to high discharge current, max. = 20A)

1. Is it ok to use the Vented Type for both saltwater and Redox flow batteries?

Anders

Edited by Anders Lundberg
Learned a bit more about batteries?
Link to comment
Share on other sites

Hello Anders,

we checked several data sheets from saltwater battery manufacturers to fit our simulation model. Due to the lack of sufficient data we didn't implement a discretely defined model yet. Since saltwater batteries tend to show a similar behaviour as lead-acid batteries (voltage), it is possible to approximate them energetically at least using lead-acid batteries.

It is possible to substitute both saltwater and redox-flow batteries using the lead-acid model considering the data you named above. Being able to compare simulation results to measured data is recommended

Luckily we have access to measured data of one redox-flow battery in the field, so it seems possible to generate a discrete model in the future. So far I'm disillusioned by the energy efficiency and I strongly recommend to ask the manufacturer for measured data preventing you from overrating redox-flow model substitutes**.

If you have further questions feel free to ask!

Best regards!
Frederik

 

EDIT:

**It is possible to regard losses due to hydraulic technics via raising the self-discharge factor.

Link to comment
Share on other sites

  • 2 years later...

Hello,

I am trying to simulate the redox flow battery "VoltStorage Smart" with the information provided above and by using the product's data sheet.

However, the "level of self sufficiency" of 42.1 %  seems too low compared to when  I choose other battery systems with similar capacities (e.g. BlueSky or BYD with more than 50 %).

Does anybody have an explanation? Maybe my model needs to be adapted?

 

Kind regards

Hubert

EDIT: the efficiency is too high. It should be 0.75 according to the CARMEN online database. Yet, changing it doesn't affect the outcome much.

h VOLTSTORAGE.pvprj VoltStorage SMART Technical Datasheet.pdf

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...