@danielfp248 sorry, my question was not well formulated. I meant a potential between the electrolytes inside the cell independently the possibility of measuring them using an electrode. Or to formulate it differently, if you cut through the cell (lile you cut a sandwich) and plotted the electrical potential between the electrodes, how would it look like?

@czahl I am a huge fan of trying this, especially for the larger format where setups are likely to be more permanent. As kirk mentioned we have never actually tried it, so please let us know if you do!

@muntasirms Absolutely! A bunch of other great documentation on here, wanted to try to my part. I have a colleague who uses HIPS exclusively in strong alkaline systems. Significantly easier to print than PP from my limited experience. It's not pure polystyrene (which is great for alkaline), but the additive(s) don't seem to affect their tolerance too much. I'll keep you posted on compatibility as I test these systems! Not sure how long the parts will last yet.

@kirk @sepi I think Bert's models are free to download off his site, but if you wanted to read the paper, I'm happy to email them to you or you can reach out to him for a copy.

On it, thanks @sepi !

Ah, in the FAQ ... Yes, was thinking wrong from other and not so good sources.

@sepi Unless you are very experienced soldering small components I would suggest not doing this. Some of the expensive components are tiny and easy to damage, either by overheating or by soldering multiple legs together and causing shorts. I tried soldering my own mystat 3 times (without success) before I got my first working one from pcbway. I am however, not good at all at soldering.

My latest quote is 315$ with assembly included by PCBWay. That's expensive but not prohibitive. Thanks for the input!

Here is an updated version! https://spectra.video/w/nJ8XNYu1MXNPSDLKV3KVTh

@gus @SamAuc ABS may work with an all-copper chemistry!

Cloning the https://codeberg.org/FBRC/RFB-dev-kit repository, opening the assembly in FreeCAD, fixing part of it, then pushing the changes with VSCodium. As part of the Flow Battery Research Collective project at https://fbrc.dev 0:00 Cloning repository 3:29 Opening assembly file 4:09 Fixing the cell assembly 20:20 Pushing changes to repository

Hi Otmar, welcome to FBRC and the project, looking forward to working with you!

@kirk said in How should we control the centrifugal pumps? TRIAC/thyristor etc? Need help from controls/electrical people: It seems to work! At least enough for testing purposes. Here is a video: https://spectra.video/w/8xipM8aXnBkDXnu4kkRpqT Here is the code for this test: https://codeberg.org/FBRC/RFB-test-cell/src/commit/d10834bc7dd67736e708c9a33832a5602ab3ca28/firmware/FlowrateRampTest.ino

That's great! Do you have a link to one or know where we could procure one to test?

Stephen Hawes of Opulo has compiled some of their tools here: https://midscale.io/docs The AutoBOM one seems to be based on those workflows above and looks pretty interesting

Reading the posts about the different pump designs, it makes more sense. More background reading to do. TY

@H4K1 no need to build the flow battery and test chemistry to help the project out! You can also build and test just with water, especially the larger cell we'll build. But if you can do CI/CD and firmware now then that's great! You'd be the only one on the project now with those capabilities, so a huge bonus. It will help make a framework that we'll benefit from as the project advances and hopefully save us some time as we improve and develop, so we can focus on what we're all best at and enjoy!