Found 10x 6s sets on ebay for $9.58 posted.
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Tim Team Reaper.

Hey all,

In making up a crappy balance jig for the e-station i blew channel one in the balance connector (row of surface mount 22 ohm resistors all scorched).

It is an easy fix as in put on the resistors, connect where needed and hence done

If it is too expensive to find the resistors as jaycar didnt sell em and if getting em shipped is fiddly what success have people had with external balance units.

I know Glen was supplied one with his charger also Jake and Russell have used them i believe.

They just connect to balance port and connect between charger output and battery right?

What sort/model do peoples reccomend?

Thanks for any help.
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Andrew Welch, Team Unconventional Robotics

I'd try not to use an external one given the choice.
I will be doing a digikey order soon so you might be able to tack some on.
wouldn't rhino have rolls and rolls of them?
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Mechanical engineers build weapons, civil engineers build targets

nah not the ones i am after, ive been through it with Jeff F and we have everything close but not quite exact.

Will get details sorted and to u ASAP

cheers mate
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Andrew Welch, Team Unconventional Robotics

I'd be more interested in tracking down why you've blown a channel on the balancer. No good fixing it if you've got a short somewhere that will just blow it again.
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https://www.halfdonethings.com/

quote:

---

Originally posted by dyrodium:
If anyone is making A123 packs for the first time (or in the past) I HIGHLY recommend having a look at this from hyperion... Off course we would be more likely to use flexable joins, but the balancing stuff is invaluable.
http://media.hyperion.hk/dn/a123/packassy/A123packassy.pdf

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@aaron- Its defo the balancing jig i made up, ask glen, he saw it and almost fainted.

The balancing jig was a number of various endcaps from other solderless packs with wires going in there and balancing leads coming off so in theory you slap the loose cells in em and balance em/charge it before assembling but it didnt work out in the end.
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Andrew Welch, Team Unconventional Robotics

http://cgi.ebay.com.au/A123-3-3V-2300-Li-Ion-Nano-Phosphate-Hypersonic-Battery_W0QQitemZ350158085113QQcmdZViewItemQQptZRadio_Control_Parts_Accessories?hash=item350158085113&_trksid=p3286.m63.l1177

single dewalt a123 cells $7.99us each!

Works out about $20.50au posted each cell.
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Tim Team Reaper.

http://cgi.ebay.com.au/10-A123-3-3V-2300mah-Nano-Phosphate-Hypersonic-Battery_W0QQitemZ370169912598QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item370169912598&_trksid=p3911.c0.m14&_trkparms=66%3A2|65%3A1|39%3A1|240%3A1318

fake or real?

IDK the seem real but sadly they only ship to US
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A journey of a million miles begins with a single step followed by a hell of a lot of other steps so get walking

Shipping states worldwide it just only has prices for USA.
typically that just means you send them a message and ask them
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Remember to trust me, I am an Engineer.

http://www.youtube.com/watch?v=rp8hvyjZWHs

Here's another pack build tutorial.
http://www.terrorhurtz.com/a123/

gahhhh i can solder the tops of the cells with solder it but teh bottom just will not stick im out of ideas
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Tim Team Reaper.

have you tried lightly sanding them and using flux?
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They say that he crossed the fine line, from insanity to genius.

Yep.

Tryed not sanding them as well.

Also tried diff solder 40w and 80w irons diff flux yelling and more.
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Tim Team Reaper.