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Wolf's PowIRwall
It is time!
The journey is about to begin its second phase and I will record the progress here.
If you are an avid reader of this board you already know that I have been collecting sorting and testing 18650 cells for about 8 month now.
I already have a functional Pb based system up and running and it is working very well for what it was designed to do. Supplement my electrical usage from the grid by about ½ to ¾. That has been successful.

This is the next step in the evolution of the design. To take a throwaway product extract the best cells out of them and reuse these cells to store and recover energy produced by a totally green energy source. "The Sun".

I would have started this thread sooner but I had a small setback with my cells as I was initially going to go by pre IR measurement of the cell as the criteria of acceptance into the PowIRwall build, but changed my mind to go with post 30 day voltage and IR checks for the acceptable IR range. That decision set me back about 162 cells from my goal of 2856 cells. That deficiency has been made up and knowing what I know about IR the cells that are waiting for their 30 day check are more than likely going to make the grade. So here I am to start sharing my journey to the 492Ah, 27.5kWh PowIRwall.

In this journey I have discovered and learned to use many new tools among them  Excel, Ubuntu, Influxdb, Grafana, Microprocessors, Arduino IDE, Sensors and many more things. Notwithstanding the collective minds of this board and their guidance and influence. I could not have made it this far without you. Thank you!
My Cell count goal sheet.

So without further adieu the prototype of soon to be 14 packs of 204 cells each.
This is just a prototype to experiment with for buss bars, fuses and construction.

So stay tuned and experience the journey with me.

Sean, RikH, Oz18650 And 2 others like this post
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
(08-07-2019, 12:59 PM)Wolf Wrote: It is time!

So stay tuned and experience the journey with me.

I.R. ... yeah. Succes! I will follow your steps.
Great timing. Today started a first small project marked ' dasPil #1 '

4s24p - 96 cells - avg 2000 mAh   -> learning attempt with weakest kept cells
4x 4.1 V -> 0.78 kWh
3x 2.5 mm² copper twisted busbar - 2A fuse/positive pole
Congratulations! Look forward to following your progress.
Oz18650 likes this post
I have enjoyed your contributions so far and I am looking forward to the next part of your project.
Good luck with it.
Yes...Wolfman, finally! congrats!

Again i will keep a close eye on you.

Best and thanks for your effort.
chuckp and Oz18650 like this post
Nice going Wolf! Congrats on making it to Phase 2! I love the cell arrangement, your attention to detail is second-to-none.
Formerly known as Dallski

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