My start

revbryce

New member
Joined
Oct 20, 2017
Messages
16
Found an old laptop batt and got excited.
After testing best i had was 500mah...:(
oh well i have some things to test sizing for 3D printing holders
and soldering test.
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so all good.
 
Looks good. I like the bus bar in the slot idea. The only thing is if you build a large enough pack, you'd need to have the bar sticking above the plane of the holder as you'd need to carry more current.

But, if you only are planning on a small pack, no worries. Or design the packs for voltage, not capacity :)
 
Korishan said:
Looks good. I like the bus bar in the slot idea. The only thing is if you build a large enough pack, you'd need to have the bar sticking above the plane of the holder as you'd need to carry more current.

But, if you only are planning on a small pack, no worries. Or design the packs for voltage, not capacity :)

Yep small packs to start for a quadbike project.
But hey i can just change the drawing for bigger bars.
Love my printer...:)
 
Messing around with bigger bus bar.
Trying to keep the cells uncover for easy removal.(Averagejoe idea i liked)
Only problem was 4 up was to big for my print bed.
12.8mm x 3.2mm copper. had it laying around and its a standard size.

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ABS off an upmini with o.4mm nozzle.
oh and bad cells so still solder test.
One day i`ll have good cells.
 
Thinking this might work for a quadbike engine replacement for low speed farm work.
also to be used as a portable powerwall of sorts for powertools.
420 cells 30p14s for 48v system...(i think)
Saw somewhere someone mentioned putting large caps inline for motor start load so will have to look into that.
Anyone know where i can find info on how many amps a 12.8mmx 3.3mm copper bus bar can take?
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It's all relative on the wire sizing. So, the 12.8 * 3.3 = 42.24mm2

So look at the wiring diagrams for a wire that size. Or, take the largest size and add what ever sizes you need to reach that size. That will give you a pretty approximate amount of current it can handle.

But, in 2 words, a lot! ;)
 
Yay turns out i can print 4x1 holders on my tiny printer
.
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only 174 to go for my first pack.
Also found these in a dell pack.

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couldnt find them on database.
data sheet i think.
hmm wont load to big i think.
 
Yep 150ish sounds right for copper according to the wire chart i saw.
Thanks for the datasheet link, that seems to be them.
It dosn`t have the "S" listed, so do we know what it means?
Or is it a manufacturing number?
Just ask as i have 2 sets of CGR18650 cells and one has an "A" other has "HG" on the end.


Top cell holders for first pack with busbar to see size.

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Finished layout with connections.
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