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Glubux's Powerwall
#51
To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.
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#52
(12-29-2016, 07:16 PM)Glubux Wrote: To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.

That's another reason I went with the solid copper wire bus bars, there is enough room to pull a single cell without having to unsolder the entire busbar like the previous design I used.
Glubux and shonalex like this post
CHEAP! 2200mAh Sanyo Cells for Salvage, Only $0.17/ea!!
^ Use discount code "BATTERY" for 10% off!
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#53
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?
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#54
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.
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#55
(12-29-2016, 07:16 PM)Glubux Wrote: To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.

I kinda figured that, but how do you keep the replacement cell in place. Remember I'm thinking about a mobile installation. Any ideas?
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#56
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 likes this post
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#57
(01-02-2017, 11:46 AM)FrostyDog Wrote:
(12-29-2016, 07:16 PM)Glubux Wrote: To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.

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

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!
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#58
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(01-02-2017, 07:59 PM)3nergE Wrote:
(01-02-2017, 11:46 AM)FrostyDog Wrote:
(12-29-2016, 07:16 PM)Glubux Wrote: To replace a cell, you have to break the 4 plastic corners around a cell and unsolder the fuses. Quite easy.

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

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!

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 Smile
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#59
Perhaps not the most interesting update but here is the new shelter for my system

Learjet, Elwood, miu And 1 others like this post
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#60
Nice shed, is it far from the house/solar ?
Current setup: 21x 215wc poly, 7.5kWh 7s 18650, PIP 2424msxe.
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