Glubux's Powerwall

Love the effort put into displaying and photographing, makes these projects look much less DIY :) Good work.
 
Thanks !

About the empty spaces, I build my pack with a 250 Ah target, which is a different number of cells dependning on the capacity range of the cells.
the lowest range of cells I'll use on those packs is 1500 to 1599 mah, let's say an average of 1550.

1550 X 160 = 248Ah

But as I said before, it seems that this calculations with a 1C discharge capacity is drifting with less cells of bigger capacity, so now I add one cell for each hundred mah range :1650 +1 cell, 1750 + 2 cells and so on.
 
Here's somepictures of the second pack :


image_njzlay.jpg


image_vczlyj.jpg


image_ndjitz.jpg


image_thaxnr.jpgimage_gmnxua.jpg


image_eikduk.jpg


image_cpncbm.jpg
 
It look nice and clean, nice work mate !
As Pete said, your photography work is really good and make it look professional work of theses used batteries :)
 
Right I fixed it...

fixed.jpg
 
Hi Glubux, great looking packs. Thinking about going something similar for an RV but running 12v and having flexible leads )where you have solid lugs) fitted with Anderson connectors so the packs are easy to remove. How do you replace your cells in the existing packs?
Cheers
Frostydog.
 
To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.
 
What is the rational behind keeping all the cells in a pack within 100 mAh of capacity? Why not intermix and make capacity and cell number equal?
 
You're right, there is not really a rational reason, I guess either way is fine, I just decided to go this way because manufacturers match their cells and also this design allows me to add cells if a pack is a bit weaker.
 
Glubux said:
To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.
Click to expand...

I kinda figured that, but how do you keep the replacement cell in place. Remember I'm thinking about a mobile installation. Any ideas?
 
That's a good question, on my first packs (page 1) the bus bar was directly soldered on the cell so it should stay in place, but with the second design, with only a .25mm fuse on each side, I think the best solution might be a gluespot.
 
FrostyDog said:
Glubux said:
To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.
Click to expand...

I kinda figured that, but how do you keep the replacement cell in place. Remember I'm thinking about a mobile installation. Any ideas?
Click to expand...

You could look at cradles, similar to what I have done, but with inline ANL fuses for extra safety.
I can pop a cell in about 2 seconds, and insert in half that time.

Sorry Glubux, didnt mean to hijack!
 
3nergE said:
FrostyDog said:
Glubux said:
To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.
Click to expand...

I kinda figured that, but how do you keep the replacement cell in place. Remember I'm thinking about a mobile installation. Any ideas?
Click to expand...

You could look at cradles, similar to what I have done, but with inline ANL fuses for extra safety.
I can pop a cell in about 2 seconds, and insert in half that time.

Sorry Glubux, didnt mean to hijack!
Click to expand...

Nice idea mate, but I'm dealing with volume constraints, why I went for the 4X5 spacers. Also, I'm not sure how the cradles would hold up to the vibrations of an offroad environment. Thanks for the thought tho :)
 
Nice shed, is it far from the house/solar ?
 
You must log in or register to reply here.
Back
Top