Viewing post history: kWeld - "Next level" DIY battery spot welder

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Viewing post history
This page shows all versions of the post, starting with the most current version.

Current post: kWeld - "Next level" DIY battery spot welder

Postby tatus1969 » Wed Jun 21, 2017 6:26 pm

Hi guys,

as part of my kicksurfer project (I was tired of my battery pack manufacturer of wanting >700€ each time I am asking him to prepare a few samples of packs from another cell type), I have started desigining a DIY spot welder.

After some googling, I realized that even when building it myself it would be quite costly, as the required power source needs to have very high specs. A suitable capacitor bank for example would be 100€+.

As I am using cheap race Lipos with 200A current rating for my RC car, I thought that they might be capable for welding as well. A first measurement then showed 1kA into a short!

I am still at the beginning, but I want to share my experience, and at the end make this open hardware that others can copy or build on.

The design thread is here, I hope it is not forbidden to link to a different forum but it is quite time consuming to keep multiple threads with the same subject.

http://www.eevblog.com/forum/projects/g ... ting-here/

Please let me know what you think, and I would be happy to hear if anyone would want to build one (after it is finished and stable).
Edited by tatus1969 on Mon Jul 17, 2017 10:57 am.
Resistance is futile - We Are The Watt.
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tatus1969
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Posts: 98
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Location: Germany

Original post: low cost DIY battery spot welder

Postby tatus1969 » Wed Jun 21, 2017 6:26 pm

Hi guys,

as part of my kicksurfer project (I was tired of my battery pack manufacturer of wanting >700€ each time I am asking him to prepare a few samples of packs from another cell type), I have started desigining a DIY spot welder.

After some googling, I realized that even when building it myself it would be quite costly, as the required power source needs to have very high specs. A suitable capacitor bank for example would be 100€+.

As I am using cheap race Lipos with 200A current rating for my RC car, I thought that they might be capable for welding as well. A first measurement then showed 1kA into a short!

I am still at the beginning, but I want to share my experience, and at the end make this open hardware that others can copy or build on.

The design thread is here, I hope it is not forbidden to link to a different forum but it is quite time consuming to keep multiple threads with the same subject.

http://www.eevblog.com/forum/projects/g ... ting-here/

Please let me know what you think, and I would be happy to hear if anyone would want to build one (after it is finished and stable).
Resistance is futile - We Are The Watt.
User avatar
tatus1969
10 W
10 W
 
Posts: 98
Joined: Fri Mar 17, 2017 7:36 am
Location: Germany

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