Re: [EVDL] Cheap Spot-welder

[Lawrence Rhodes via EV]

 Check out 12V Portable Mini DIY Battery Energy Storage Spot Welder Pen PCB 
Circuit Board  https://ebay.us/OVAdqL  This one is in Kentucky. I have some 
Hawker Genesis. Maybe I can rig a foot pedal. Lawrence Rhodes

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Re: [EVDL] Cheap spot welder.

[jkenny23 via EV]

I would /not/ buy any $20-50 class spot welder. If you do, you will need to
modify it yourself to be "usable". I bought a similar model, tested it, and
it blew up on setting 3 out of 7:
https://www.youtube.com/watch?v=KJLoYJSm0E0 FYI the fix for this is
apparently to separate the MOSFET/control circuitry power from the "weld"
power (e.g. LiPo or car battery), such that when the voltage drops on the
weld power source, it doesn't cause the MOSFETs to drop into a linear mode
and overheat/blow up.

A good spot welder is either the Malectrics or kWeld, which will set you
back between $150-255. I'm also backing the Nano Spot Welder, which was
cheaper on Kickstarter, which was $80 at the time I backed it, granted it's
less capable, only designed for 0.15mm nickel or smaller.

Nano:
https://www.kickstarter.com/projects/repowered/nano-spot-welding-just-got-easy-and-affordable
Malectrics: https://malectrics.eu/ 
kWeld: https://18650shrinkandcellholders.com/kweld/

However, in general I would agree that spot welding is not for the faint of
heart, and not a beginner technique, if you do decide to spot weld a large
pack, make sure you practice lots and get the technique down first before
you build anything that can cause serious damage if done wrong.

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Re: [EVDL] Ego batteries?

[Jay Summet via EV]

These are normally $400 batteries:
https://www.rspsupply.com/p-17615-ultralife-lithium-power-battery-urb12350-12v-32ah.aspx

$99 looks to be a reasonable price on the used/surplus market.

I can't speak as to their quality or the reputation of 
batteryhookup.com, but the spec sheet seems to be reasonable:


https://www.rspsupply.com/images/downloads/Ultralife/L/Ultralife%20Lithium%20Power%20Battery%20URB12350/Ultralife%20Lithium%20Power%20Battery%20URB12350%2012V%2032AH%20Spec%20Sheet.pdf


Jay

On 10/25/20 10:28 AM, Rod Hower via EV wrote:

  Have you tried these batteries Lawrence?  They claim on their website that 
most of the batteries tested have 90% capacity.  What kind of reputation does 
batteryhookup have?  Not necessarily ratings from a Google search but things 
you've heard on EV sites NEV, etc.
 On Saturday, October 24, 2020, 11:35:18 PM EDT, Lawrence Rhodes via EV 
 wrote:
  
  These batteries maybe just the thing for a drop in solution for eGo scooters or other projects mimicking lead acid. That is use your original charger. Lawrence Rhodes  https://batteryhookup.com/products/lithiumpower-12-8v-32ah-410wh-lifepo4-module-w-bms?rfsn=1727885.2bd9ce



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