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Dennis' 14s200p x 2.
#1
Hello guys...

25-01-19
All cells tested. Starting to design my packs. My minimum cell voltage will be 3,25v and max is 4,09v. Batrium setting will be at 4,1v. The average is then 3,67v which result in 50,5kW powerwall.

The build will be in a rack (Check pictures). I got the ABB S5N from US. Pretty good deal, so I can shut down the batteries, just as an extra precaution. 

Anyways, here is some pictures of the progress. 

Shelf's for my battery packs: Will be mounted in a rack (Like Average Joe, but higher) The 30x30mm are aluminum. The shelf is from Legrand, and is a metal sheet made for cables mounted on a wall. The aluminum i got from Motedis. German site, also in english. Good fellow.



This is how my battery packs will look like. 7x6mm2 wire in each Anderson plug. Let's do some math. 6mm2 is equivalent of 9/10 gauge. Let's say 10, just to be sure. When you put that into the gauge Calculator it equals 5 gauge. So the two rows on the side of the batteri is 5 gauge (16.8mm2) and the three middle once are 7 gauge (10.6mm2) 

5 gauge / 16,8mm2 can do 79A.
7 gauge / 10,6mm2 can do 60A.

So the Anderson is rated for 175A, but I use one for plus side and one for minus side. I've found some cheap 35mm2 high flex cable. Which I use for my first 2 14s. Så if I expand to 3 x 14s i will go down in mm2 and in plugs. Because I will limit the power to each pack to 65-70A (Approx) Also went with another design, check that out further down.



Testing batteriers: 
  

90 kilos a few weeks ago:


Home made tp4056 rail:


Power (Almost done) for rail:
  

Power box for 10x Liitokala


New stack of batteries, think I'm set on batteries now (28-10-18) Big Grin

Korishan, PaulDane, hbpowerwall And 5 others like this post
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#2
Not cheap, but I just bought one of these:
ABB 160A DC breaker
It's a 160A DC-breaker (actually built for high voltage DC solar arrays) with what seems to be a shunt trip. Mine is still underway, so we'll see...
Looks like you've make quite the start on your powerwall, keep it up!
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#3
Looking good. I can remember those days not so long ago, charging 9 x 18650s as I only had two chargers. Slow process but you will see the benefit when you finish testing them all and find the bad cells. Good luck. 200P ... nice Big Grin
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#4
(10-13-2018, 09:10 AM)wimpie007 Wrote: Not cheap, but I just bought one of these:
ABB 160A DC breaker
It's a 160A DC-breaker (actually built for high voltage DC solar arrays) with what seems to be a shunt trip. Mine is still underway, so we'll see...
Looks like you've make quite the start on your powerwall, keep it up!

Ahh, nice mate. I'll take a look at it. But I'm starting to realize that these breakers arent cheap. Unless you get a used one.


(10-13-2018, 11:46 AM)lordxenu Wrote: Looking good. I can remember those days not so long ago, charging 9 x 18650s as I only had two chargers. Slow process but you will see the benefit when you finish testing them all and find the bad cells. Good luck. 200P ... nice Big Grin

I hope! Big Grin Let's see how many good cells I have when I'm done testing. Big Grin Might upgrade on a later time.
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#5
nice keep it up!
what kind/model of battey packs are your recycled cells from?
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#6
(11-06-2018, 10:45 AM)collinkoolen999 Wrote: nice keep it up!
what kind/model of battey packs are your recycled cells from?

Hi collins. 

I've got approximately 300 kilo of reused laptop batteries. And i got a auction for 270 kilo of used e-bike batteries. So have ALOT of low capacity batteries. Pretty many bad once among those laptop batteries.

Ripping those nikkel strips off E-Bike batteries, while watching HP powerwall and DIY tech and repair! 

 
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#7
Shelfs are taking shape. Just need to cut the grid for the top and measure out the shelf height in the rack. 

Also need to level out the rack, so it doesn't tilt forward (Not good)

PaulDane, Korishan, jdeadman And 1 others like this post
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#8
My rack cabinet almost ready for my packs. The animated picture, was my layout from the start and actual pictures are yes.. the way it formed out.
jdeadman, Korishan, RikH like this post
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#9
Starting to build my packs. Jezz.... this gonna take a fair amount of time :Big Grin

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#10
I like the racks for sure! Smile
WuggyBuggy likes this post
The Ultimate DIY Solar and build place
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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