How do you build a battery spot welder?

To build a DIY battery spot welder, you will need a few essential components, including a power source, a welding electrode, a welding tip, and a control circuit. Additionally, you will require a timer, a safety switch, and a casing to hold all the components together. How do you determine the appropriate voltage for a battery spot welder?

What is a portable spot welder?

Portable spot welder that doesn't need microcontrollers, uses recycled industrial thyristor and mostly off-the-shelf components In this project I designed and built a prototype of USB-C powered capacitive discharge spot welder. It can be used to weld nickel strips to battery packs.

What power source does a spot welder use?

Other spot welders often use car batteries, microwave oven transformers, high-current li-po battery packs or supercapacitors as power source. All of these things seemed to be very powerful and somehow scary to me, so I decided to use an capacitor bank made of regular electrolytic capacitors.

How many amps can a spot welder output?

Contest Spot Welder Dual Pulse Capacitive Discharge : This Instructables includes plans to build a dual pulse capacitive discharge spot welder that can output 400 amps in 60 micro seconds.

How does a spot welder work?

It can be used to weld nickel strips to battery packs. This allows re-building battery packs for various devices, especially ones that are no longer maintained by the manufacturers. This spot welder, unlike many available DIY projects, doesn't need a microcontroller to work: the welding pulse is triggered using relay module and a timing capacitor.

How do you Weld battery tabs with a spot welder?

Finally, align the nickel strips with the battery tabs and clamp them in place with the electrodes. To start the welding process, press the trigger on your battery tab spot welder. The welder will create an arc between the electrodes and the nickel strips, which will melt and fuse with the battery tabs.