Flow Battery Research Collective

I just had get the .stl files for the end-plates and I will print them

Hi Kirk, I am very interestet in your new endplates.

I have try-ed to download Your new files from github (.stl and .pdf), but the files all appeared as broken, even in github.
How to get this problem solved?
(please see: my suction luer lock)
also some other links from you do not work
(only for information: my system is Kubuntu 24.04 LTS, Firefox)

doho

I'm not sure, but hopefully my foto will arrive (it is now only 1,4MB instead of 4GB)

My individual changed construction

/FBRC-Redox-FLOW-Batterie/Fotos Projekt/IMG_7768.JPG

As I had to change the tubes in my pumps (they were the wrong tube type),(thanks @sepi) I also changed the connectors to Luer Lock .
Therefore it was necessary to enlarge the boreholes in the endplates and in the brass-plates to 10.5 mm to get the female Luer Lock part through.
And I changed my construction to sucking from the cells.

Some other thoughts:
@danielfp248 In your picture of 08.01.26 you put the pump for suction on the lower side of the cell, why?
In my opinion it would be better to connect the pump upper side to avoid air in the system as I did in my setup.

@kirk
your new approach for the test cell seems veri interesting. But for getting reproducible resultants the flow through the cell should be down to up, but not horizontal (how much would be air isolating in the chamber when changing parts?)

I do not have an idea for a reasonable physical layout for a really simple change of the test-chamber, but I will think over.

Printing materials I have used:
Parts not in contact with chemicals: PETG, works very well
PP: My 1st: (Yousu),all surfaces o.k, but all barbed broke. 2nd: Innovatefil PP GF worked very well, but the upper surface was rough, tests will come.

Hi sepi, your refactor-modular works on my PCs: my mainPC (Kubuntut 2404) and two Notebooks for measurements (Kubuntu 2404 and Win11), thanks.
I'm waiting for your calibration wizard. My hardware is waiting incl. Mystat, but till now I did not do tests.

@sepi sorry, I forgot to send my email address: doho.cnc@online.de

@sepi I would be glad to get this 2m. I still don't use a smartphone, but perhaps I should do in the future.

@sepi
maybe I'm a little stupid (I'm not a digital native): where can I find my private messages? I apologize.

Hi danielfp248,
if have found another simple way to avoid the tape: shrinkage tube, cut to desired length, push over the screw and shrink with a hot air gun. This material is mechanical very stable and cheap to get.

doho

Hi sepi,
I'm the "someone else" to take 5m. How can we get inn contact?

doho

@sepi
Thank you for your welcome.
I'm located in germany, "nord-oberpfalz".
I would take 5m at this price, (I just now only need less than 1m) just to have some in reserve for further experiments.

How can I get in contact with you? Paying in advance would be no problem.

@sepi Hi, if you do the selling of the tube, I would order 2 (two) meters.

@kirk Hi,
I'am doho, in retirement since last year. Since my childhood I am interested in all kind of technics, later on especially in electronics and a little computer-science, although I worked in another field most of my working time. Now I try to learn more about mcu's and sbc's (arduino, ESP32, RPI)
I'm interested in flow batteries since many years to optimize my system 20kW PV with 30kWh LFP-batteries, using a heat-pump for the house (i.e. much energy in the summer, but too low in the winter where I would need it. A storage problem). But i noticed many companies and projects to come up and crash long time before ready to market.

I found FBRC in one of the last issues of c't (Heise-Verlag, heise.de) and was interested at once.

Meanwhile I'm building your test-cell, 3D-printing is done, pumps are in loco, arduino is programmed,but I'm waiting for some other components,
especially: do you have an alternativ suggest for the tubing (I have purchase a tube TYGON LMT-55, but I'm not shure it will work).

I'm sure, for starting, when construction is more ore less finished, I will need some help of the comunity.

Perhaps my faulty trials will bring a little progression, I will report.

I know my english is very poor, due to lack of experience in the last years, but I hope this should not be a problem.

Sincerely
Dr. Georg Hoffmann