Thread Tools
This thread is privately moderated by compass, who may elect to delete unwanted replies.
Sep 11, 2020, 03:12 PM
Registered User
compass's Avatar
Thread OP
Build Log

DIY Battery Spot Welder


I am starting to find interest in more med/long range RC, and Li-ion setups. Found the thread in Endless Sphere for the JP Spot Welder where the designer open sourced his creation after selling them for a long time. For the electrodes, I came upon an Instructables for a pair of Pen-style electrodes made from brass (I used aluminum) tubes and drill collets. I only have a rudimentary knowledge of electronics & circuitry, yet I found this build to be fun, educational, not that difficult to build.
I'm just doing this as a fun, relatively inexpensive project, I'm not mass producing battery packs for an ebike or ecar. It's more than enough for the hobbyist, and probably good enough for a pack-maker that wants to make $. Whether it's cheaper than buying a low end commercial battery spot welder, I do not know.
The end result is an adjustable, duel pulse battery spot welder.

All the information is located in the following:

- JP Spot Welder info
- Pen-Style Electrodes

The PC boards can be fabricated from an online vendor such as: JLCPCB
Just upload the board files found from the Endless-sphere thread. Cost is like $5 for 5 boards including shipping. Seriously don't know how they make money.

Components can be purchased from Mouser or DigiKey. Rest of parts can be found on Ebay.

Here's a short video of it in action:
Last edited by compass; Sep 11, 2020 at 03:24 PM. Reason: video link
Sign up now
to remove ads between posts


Quick Reply
Message:
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion DIY Spot welder (18650) larryoakley Batteries and Chargers 2 Aug 15, 2020 12:25 PM
looking for spot welder for making battery packs Twmaster Power Systems 23 Jun 21, 2015 05:19 AM
Question Any DIY spot welders around? village_idiot DIY Electronics 70 Mar 13, 2011 11:11 PM
Discussion Battery spot welder Gundy Batteries and Chargers 7 Dec 29, 2007 08:41 AM