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Vinnie & Shaun Design
#11
Holders cost. Imagine doing 29000 cells like i have... Or just doing a 10ke system with 1400 cells. Spotwelding is faster and cheaper even with learning it all.


PCB in all its glory but they need to be mounted together too
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#12
(03-04-2020, 05:57 AM)daromer Wrote: Holders cost. Imagine doing 29000 cells like i have... Or just doing a 10ke system with 1400 cells. Spotwelding is faster and cheaper even with learning it all.


PCB in all its glory but they need to be mounted together too


You make a good point, I guess we could do some rough math regarding the battery holders.



10kW - 1400 Cells - Based on the Vinnie Marco Designed PCB's.

Each board holds 60 cells, so that's 24 boards rounded up (24 x 60 = 1440).

Each board would require 12 x 4-Cell Holders and 4 x 3-Cell Holders.
The 4-Cell Holders are 0.34p in GBP (around $0.26 in USD), the 3-Cell Holders are 0.32p ($0.24).

24 Boards would require 288 x 4-Cell Holders and 96 x 3-Cell Holders in total.

Per Board, that's £4.08 for the 4-Cell holders and £1.28 for the 3-Cell Holders. Total Cell Holder Cost per Board = £5.36 ($4.15).
24 Boards x £5.36 = £128.64 ($99.64) in Cell Holders.

Shipping as always hurts, I guess the more you buy in one go the better but I would like to think you could get 384 Cell Holders shipped for £50 ($38.73). 

So with a shipping fee of £50 (I don't know how realistic that is), the estimated Cell Holder Cost would be £178.64 ($138.37).

Additional Notes:
I costed this up using the plastic Cell Holders.
In the PCB design example, they used the metal clips which are dirt cheap, pennies.
https://github.com/WannaBAcoder/PCB-Powe.../README.md
Personally, I don't like the clips even though the plastic holders cost around 10 times the price of the clips.

I used my local currency GBP in the UK and a rate of 1.291 Dollars to the Pound for the US Dollar conversions which was correct at the time of writing.

So in conclusion, it will cost quite a bit more than adopting something like a DIY pack build using Nickel Fuse Roll. 
I don't think any of us was under any illusion that wouldn't be the case. I mean this was just a Cell Holder costing.
Going the PCB route also has Fuse costs and the PCB's themselves to factor in!

Its been a useful exercise, I costed up 32 feet of Nickel Fuse Roll to do 1400 Cells too and the cost was $84.18, $54.19 cheaper than Cell Holders but again going the Nickel route includes fusing so not a true comparison.

I may do a complete costing if I get bored of making Vinne's PCBs just for the hell of it.
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