DIY Spot Welding machine for battery packs

Introduction

NE555

Transformer

Theory: NE555 based

Idea

The 555 timer circuit controls MOSFETs that deliver short, high-current pulses for welding nickel strips. The 555 shall work in monostable mode.

The MOSFETs (IRLB4132 or IRF3205) handle the high welding current.

Kits

99 Gears 12V Spot Welder Kit

• Problem: Blowing up.
  • Not enough amperes from the battery. If not enough current for the mosfets, those will blow.
  • Nickel thickness of 0.1 - 0.2 mm: 120 - 180 Amps.
• Problem: Welding takes a lot of practice.

References

Some references related to 555 based

https://hackaday.io/project/204777-diy-battery-spot-welder-build-your-own-power-pack/details

https://www.instructables.com/DIY-Battery-Spot-Welder-Build-Your-Own-Power-Pack-/

pcbway.com/project/shareproject/