Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
What/where to get copper wire.
#1
Sorry for this question, but i am losing my patients.
I tried tinned copper wire, bare copper wire, 0.5mm copper wire ect
NOTHING...that suits my demands.
Probably i am searching the wrong way, after 3 HOURS still didn't find what i was searching for on ali:
Simple 0.5 mm (or similar) BARE COPPER WIRE or tinned wire on a coil or something.
I need 5cmx25 per pack x 14 packs x 10!=200 meters if my calculations are right

What copper wire do you use at the neg side of the cells?
It needs to pass a 100mah per cell.
How do you get copper wire the alternative way, strip wires?
What wires?
Just want to buy a coil or something.

Sorry but i just had to blow off some steam also, probably will regret the setup of this post tomorrow.

Thanks for understanding, thanks in advance for a answer
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#2
What Country are you from ?
Reply
#3
The Netherlands, Holland, in europa
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#4
https://nl.rs-online.com/web/

I thought you were going to say Outer Mongolia - there'll be plenty of electronic suppliers in such a civilised Country as yours.
Reply
#5
At Sean

Civilised Country as yours?
Euh oke, your welcome to stay and i show you around, where are you from?

But i drove to a "old fashioned" electronic supplier, there are not much around here anymore and i wanted to be lazy and cheap.
But "Klare" In Zwaag had what i wanted and cheaper than alibaba?!?!?!?!?
I ended up with 0.8mm tinned pure copper 50 meters wire 0.5 ohm per meter wire, for 5 euro.

I also think(know for sure 95%) he is one of the LAST old fashioned electronic supplier here in Holland.

Thanks for the wake up call.
Sometimes you don't see the tree in the forest anymore.
Geek likes this post
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#6
I may be late here already. Look for UTP CAT5 cable. Regular Ethernet cable. It has eigth 0.5 mm ( or less) copper cable inside. Give it a shot, it may or may not be your solution.
Reply
#7
(07-11-2019, 05:17 PM)100kwh-hunter Wrote: What copper wire do you use at the neg side of the cells?
It needs to pass a 100mah per cell.

I just noticed this. I think you mean 100mA, not 100mAh. If the latter, that's a very very shortly lived piece of wire. Wink

btw, a wire that will blow at 1A is sufficient for using as a fuse for cells. The fuse at this level is not to limit the cell's delivery capability, but to limit inrush current if the cell short circuits itself. So even if you had a fuse that could handle 2A, and the parallel section was 10p, then at least 10A would be produced. So a 2A fuse would pop very quickly.

You don't want to use a wire too thin, otherwise you get too much resistance at normal, or surge, currents. This resistance heats up the wire, and will cause it to fail randomly, instead of under a fault condition.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
(this chat is not directly affiliated with SecondLifeStorage; VALID email req'd)
Reply
#8
yap, 100mA,(i really need to work on that)
The wire i bought for the neg side is 1mm thick, i thought 0.8  Blush
On the pos i have 2A glass fuses for the first 14s100p, the rest will get 1A glass fuses.
Still learning English. Learning Li ion and solar technology.

1400 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
2600 waiting for testing.
approx: 500 cells not safe for use: dead, heaters, to high ir or sd

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#9
(07-19-2019, 12:02 PM)100kwh-hunter Wrote: yap, 100mA,(i really need to work on that)
The wire i bought for the neg side is 1mm thick, i thought 0.8  Blush
On the pos i have 2A glass fuses for the first 14s100p, the rest will get 1A glass fuses.

You should go for bigger fuses. Even 5a is ok. It is only to protect the pack, in the event that a cell goes short circuit. Small fuses will only waste power due to their resistance.
100kwh-hunter and Korishan like this post
Reply
#10
I use 30 AWG "Remington Industries 30TCW Tinned Copper Wire, Buss Wire, 30 AWG, 100' Length, 0.0100" Diameter, Bus Bar Wire, Silver" as my + fusing to the busbar of the pack for each cell. I found that smaller wire is hard to find! 30 AWG is easily available on Amazon. From my experiments, I believe it burns thru in the 7-15amps range depending on length.

I've watched a few youtubes on fusing... (thank you Average Joe and others)... and it can get quite detailed. However, the general goal (for me) is simply DIY battery protection/safety and I've come to believe a wide range of amps (2 or 5 or 10 or even 15) will meet that goal as long as the low end is high enough for the battery design.

7-15amps sounds high - but as has been pointed out, you are fusing the pack dumping current into the shorted cell - not the cell into the pack.

From my personal experience, I've had at several cases of immediate burn-thru (with burned finger tips to prove it) when soldering up a pack. I've also shorted the wire on various cells that make up the pack and the wire (3" length) burns thru with no problem - so I'm become convinced it will do the job for my purposes. Smile

Since this is a such a safety issue - I must defer to experts on this channel. I only offer this as a sharing of what I did personally.
Reply


Who read this thread?
45 User(s) read this thread:
daromer, Sean, mike, Majorphill, Korishan, PAF, jdeadman, wim, watts-on, Chiptosser, BlueSwordM, Geek, Oz18650, PowerLio, djuro, Lindsaymac1, drchips, gpn, Chablis_m, Headrc, jonyjoe505, Ibiza, Oliman, Bubba, Riplash, 100fuegos, w0067814, Bastler_Ro, Solardad, RikH, newone972, oloyeadeniran, OffGridInTheCity, Rubert, 100kwh-hunter, juanjo57, ben teker, 18650mb, Tektiitti, Saiya, krobertson, solarsteve, stok, TBL18650, Denneychris

Forum Jump:


Users browsing this thread: 1 Guest(s)