13$ battery spot welder testing out

B

bitDad

100 mW
Joined
Dec 10, 2019
Messages
35
After many research, I decide to buy this lifepo spot welder instead of DIY one :bigthumb: . It's very cheap, 13.52 dollars for personal use, not for commerce.
It can use with < 0.15 Nickel Strip, this test using 0.1 Nickel Strip.

//I don't advertise for it, just a test video for anyone want a cheap spot welder.
https://youtu.be/Kh2zizuSgF0

[youtube]Kh2zizuSgF0[/youtube]


//update:

I was got a new Cheap spot welder for further e-bike battery pack !!!
[youtube]2jxcZHzowS8[/youtube]

//update #2
I was got a Self-balancing Spot Welding Pen - it's saved my welding time
[youtube]Uqo8kCGixVo[/youtube]
 
Completed Li-ion 2s2p 7.4v 4000mAh battery pack with BMS from an old power bank
 
For a good spot weld, you need controlled current, welding time and pressure.

If all 3 are furfilled, it's a great find.
 
ebay: https://www.ebay.com/itm/Portable-Mini-DIY-Nickel-Strip-Connection-Battery-18650-Batteries-Spot-Welder-Y/184052358668?hash=item2ada601e0c:g:FGEAAOSwpBdd25hJ

But the welds do look kinda weak.

Similar one: https://www.ebay.com/itm/Mini-DIY-Nickel-Strip-Connection-Battery-18650-Batteries-Spot-Welder-Portable/383310688088?hash=item593f18ef58:g:wZgAAOSwvcdd70bC

Board only: https://www.ebay.com/itm/DIY-Power-12V-Battery-Energy-Storage-Spot-Welder-Machine-PCB-Circuit-Board-Set/303399621212?hash=item46a406d25c:g:hAoAAOSwUeBd8KDe
 
hemo said:
Tbh none of those welds were very strong, the ease at which they were pulled apart using only your fingers showed that.
Click to expand...

I totally agree, because the price is too low, so I cannot expect more.
 
It's not meant as a criticism of the Welder as it is only a few dollars but more to be wary if trying to weld together an ebike usable battery, the battery will be a liability and with poor welded interconnectors that will fail easily.
 
hemo said:
It's not meant as a criticism of the Welder as it is only a few dollars but more to be wary if trying to weld together an ebike usable battery, the battery will be a liability and with poor welded interconnectors that will fail easily.
Click to expand...

for an ebike I think need a more powerful welder. If used for small packs, it is okay :bigthumb:

A clearer picture, I see the welds very well
battery pack using cheap spot welder.jpg

You can see the welding this pack process here: (begin 3:48)
https://youtu.be/oSBD05U-sfg?t=228
 
.
... 12V 150A variant -$21+


 
I ordered the one above, some russian review here:

https://www.youtube.com/watch?v=jSemWs1aIHg
 
DrkAngel said:
.
... 12V 150A variant -$21+


Click to expand...

Ordering 1 also, does require 150A input!
I have spare 3s1p 8Ah 200A continuous > 400A surge LiPo from Alarmhookup
 
Cheapest seems to be here, under $15 shipped:

https://www.aliexpress.com/item/4000510965499.html
 
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