Updates on development kit, large-format cell, roadmap
It has been several months since our last update and we thank you for your patience! If you’ve checked out the forum you’ll know there’s been plenty of activity. Be sure to make an account there to receive the latest updates!
Development kit stable and certified by OSHWA
The development kit is now stable, and multiple people are in the process of reproducing our system on the forum. We recieved certification from OSHWA confirming that our kit conforms to best practices.
Presentations and articles on the FBRC
Articles written on FBRC
Maximilian Voigt wrote an article on FBRC’s efforts that was published in heise online (EN, DE), we are grateful for his interview as it really helped spread the message of what we are trying to accomplish.
Talks
Prof. Sanli Faez presented FBRC work in the context of the FAIR Battery project at OSHWA 2025, video below:
Daniel presented FBRC at FOSDEM 2025:
Kirk presented the project at the annual French network meeting for RFB research, slides are here and below:
Large-format cell R&D
We have made good progress towards our “large-format” cell, which is 175 cm². The design thread in the forum is here, all design files are on the repository here. It is designed so the flow frames can fully utilize the bed area of common FDM printers, and maximizes the use of laser and vinyl-cut 2D parts.
Here is a video of assembling the cell:
And testing the flow loop with water:
We are waiting for a shipment of chemicals as well as doing some integration work on the relevant power electronics to allow us to perform charge/discharge testing.
All-iron electrolyte exploration
Daniel has been testing some very exciting all-iron electrolyte compositions with the development kit that we hope to test in the large-format cell. Read about his progress here.
What’s next?
We plan to run our first charge/discharge tests soon in the large-format cell with the zinc-iodide chemistry from the development kit, followed by hopefully tests with an all-iron chemistry. This will be at the single-cell level. Once this is complete, we would like to stack at least three cells together using the large-format design.
Other tasks coming up include:
computational design optimization of the flow frame in the large format cell/stack
programming the power electronics in the OwnTech Twist/Spin boards to allow for constant-current mode operation
Please get in touch on the forum if you’d like to contribute on these issues!
Funding
This project was funded through the NGI0 Entrust Fund, a fund established by NLnet with financial support from the European Commission’s Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101069594.
We are very grateful to NLnet for their support of our work.
Citation
@online{smith2025,
author = {Smith, Kirk Pollard and Pinto, Daniel Fernandez},
title = {Updates on Development Kit, Large-Format Cell, Roadmap},
date = {2025-10-15},
url = {https://fbrc.dev/posts/october-2025-progress-update/},
langid = {en}
}
Comments
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