DIY assembly kit for 18650 without spot welding/Soldering

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bobbill   10 mW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by bobbill » Jun 10 2018 2:06am

tomjasz wrote:
Jun 09 2018 10:21pm
Why toss the bars? You’re not drawing enough power to have a problem. Sorting out appropriate information here can be befuddling. You have fellas that want to run 60v and 40-50A. You’ve got a little 36v, not needing amps at a rate where V1 kit could be a problem. A n00b giveaway, analysis paralysis. Don’t be overwhelmed.
You are right...am too anal...and the item is whimpy enough no problem...spin off from some other doings...and its the first one. In for a penny, in for a pound is not always the best, but...and it is overwhelming at first.

Good points!

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by tomjasz » Jun 10 2018 4:06am

bobbill wrote:
Jun 10 2018 2:06am
tomjasz wrote:
Jun 09 2018 10:21pm
Why toss the bars? You’re not drawing enough power to have a problem. Sorting out appropriate information here can be befuddling. You have fellas that want to run 60v and 40-50A. You’ve got a little 36v, not needing amps at a rate where V1 kit could be a problem. A n00b giveaway, analysis paralysis. Don’t be overwhelmed.
You are right...am too anal...and the item is whimpy enough no problem...spin off from some other doings...and its the first one. In for a penny, in for a pound is not always the best, but...and it is overwhelming at first.

Good points!
Which cells will you use?
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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bobbill   10 mW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by bobbill » Jun 10 2018 6:19am

Panasonic PF 2900 ah jobbers...which was recommended here...buying blind, of course. Spendy suckers. Bought some nickel, to replace kit busses and forgot about ss in caps, so that was another mistake...lot of mistakes. High learning curve seems unproductive, but as I said, in for a penny, in for a pound...and all I wanted to do is get up hill to home...on hot summer days.

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parabellum   10 MW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by parabellum » Jun 10 2018 11:38am

Edit to review: Bolt and Nut is alloy of brass an copper

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bobbill   10 mW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by bobbill » Jun 10 2018 12:45pm

In the older kit? Thanks...

Am back in business (tidy me) with old kit, plus nickel I have on way. if I understand how the (Kircchner thingy) metals do it....

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by tomjasz » Jun 11 2018 12:55am

bobbill wrote:
Jun 10 2018 6:19am
Panasonic PF 2900 ah jobbers...which was recommended here...buying blind, of course. Spendy suckers. Bought some nickel, to replace kit busses and forgot about ss in caps, so that was another mistake...lot of mistakes. High learning curve seems unproductive, but as I said, in for a penny, in for a pound...and all I wanted to do is get up hill to home...on hot summer days.
From where? Should have been around $2.50 each plus shipping.
viewtopic.php?f=31&t=61608&hilit=Tumich
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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bobbill   10 mW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by bobbill » Jun 11 2018 1:47am

Thanks...Some battery place noted here, these were new, like the green Panisonic NCR PF 2900ah in pics. I think price was close...maybe around 3-$coots shipped.

Was more interested in getting clean new items at time...blind buying...the sophistication has widened since, but it's done.

Now, awaiting the new tabs busses and tie it all together, once I figure out what to do with the controller...bag the battery and hang controller on bag someplace...probably. Bike is a Xootr and want to keep it all small.

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spinningmagnets   100 GW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by spinningmagnets » Jun 11 2018 10:17am

If someone is curious about these, but are hesitant to purchase a full kit before you can test them in your application, I have some I can send anyone here for free to test. Just pay shipping. Four cell pairs can provide 12V, and that should be enough to test this style.

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BlueSwordM   100 µW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by BlueSwordM » Jul 23 2018 6:13pm

I do have an interesting question for Vruzend and Micah though.

I'm a new user too, so hi everybody!

For the spring material, couldn't we have used phosphor bronze C54400 19% IACS, beryllium copper C17530 38% IACS, or even better for the best compromise between conductivity and yield strength, BeCu C17200 22% IACS?

That last one is essentially very interesting since its yield strength, when heat treated and hardened, can reach a yield strength of almost that of stainless steel, while having 4-5x its conductivity. Having high yield strength, meaning resistance to plastic deformation is almost as good as steel, is what really matters in a spring.

All of the previously mentioned materials could be used, the highest performance one being BeCu C17530 38% IACS, having the highest yield strength relative to its conductivity, because using something like BeCu C17500 45% IACS would be tempting, but its yield strength is quite poor compared to all the other materials.

That would have made prototyping Matador's idea much more interesting, since you would not need to bypass the springs for high currents, and still retained high springyness.

Would be an interesting idea to implement if you could, as you could make a 10A capable version using BeCu/Phosphor Bronze, and a 20A capable version using nickel plated copper.

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BlueSwordM   100 µW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by BlueSwordM » Jul 23 2018 6:16pm

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BlueSwordM   100 µW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by BlueSwordM » Jul 23 2018 6:20pm

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BlueSwordM   100 µW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by BlueSwordM » Jul 23 2018 6:27pm

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BlueSwordM   100 µW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by BlueSwordM » Jul 23 2018 7:17pm

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riba2233   1 MW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by riba2233 » Oct 16 2018 11:30am

sooo... Nobody posted this:

https://www.youtube.com/watch?v=KUmlCH7bTO8


:mrgreen:

tomjasz   1.21 GW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by tomjasz » Oct 18 2018 6:06am

What a fool!
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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bobbill   10 mW

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Re: DIY assembly kit for 18650 without spot welding/Soldering

Post by bobbill » Oct 18 2018 6:21am

I am not so sure I "get it" but I bought and assembled the second (black/orange) kit from Mikah to add to the first to extend range etc.

I think, the kit is excellent. copper...etc.

The first kit I replaced the buss bars with strips of nickel, as I found out they were coated and would not take solder. Might be overkill, but am not too versed in this stuff, so... Any way,

The kit was short some buss bars and had two broken caps (screw welds parted) but there were just enough extra caps to make it work.

Mikcah quickly replace the missing buss bars...

FWIW, I think SS for the nuts would work fine with the kits, as the nuts are only fasteners, not conductors.

The two extra (for me) wire connectors offer two more buss bars, if clipped, but did not need, so will hold, in case.

All sits awaiting warm, dry weather to cruise (I did not install cells as yet in case weather here (Mn) stays cold til spring.'

I think, for what I need, kits are perfect.

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