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#4575187 - 11/15/17 04:03 PM Spot Welder - Neat
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4575253 - 11/15/17 05:09 PM Re: Spot Welder - Neat [Re: StevieC]
andyd Online   content


Registered: 09/25/04
Posts: 7167
Loc: Marshfield , MA
Kewel, way over built for 32 spot welds though. It emboldens me to fix a few bad cells. Thanks
_________________________
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#4575269 - 11/15/17 05:27 PM Re: Spot Welder - Neat [Re: StevieC]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
I was looking for a solution to do this sort of thing with the battery in my robot vacuum that has a bad cell and keeps shutting down as a result of low voltage.

His setup is a tad bit overbuilt but I do like the solenoid and switch for pulsing though.
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4575569 - 11/15/17 10:00 PM Re: Spot Welder - Neat [Re: StevieC]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 706
Loc: Canada

Interesting but why who the guy spot weld whole banks of batteries in parallel? Typical packs
are cells in series, with short nickel tab strips from + to - on the next cell.

I do like that he hot-glued the cells in place, keeps things lined up!

TIP: If you want to build replacement battery packs, it's a good idea
to put each cell thru a charge and discharge cycle, it's possible you'll get a new bad cell that
would spoil the entire pack from day one! Seen it happen!

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#4575796 - 11/16/17 08:25 AM Re: Spot Welder - Neat [Re: StevieC]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
My robot vacuum that I need to fix the battery on has some in series and some in parallel.
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4575825 - 11/16/17 08:57 AM Re: Spot Welder - Neat [Re: StevieC]
zzyzzx Offline


Registered: 05/18/12
Posts: 4372
Loc: Baltimore, Maryland, USA
I've been thinking of using one of those 500F super capacitors for this. Even at 2.7V it seems to work. Otherwise nothing fancy, and no circuity required other than a power supply that I already have to charge the cap.

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