If you are building custom 18650 or 21700 lithium battery packs, you absolutely need a spot welder to safely attach nickel strips without overheating the cells. Watch how I built this powerful homemade spot welder specifically for DIY electronics!
I’ll show you the core mechanism behind generating high current for micro-welds, utilizing a specialized spot welder control module paired with a high-discharge battery (or modified transformer). This build gives you professional-grade battery welds on a DIY budget.
⚠️ DISCLAIMER: Spot welding involves very high electrical currents and sparks. Always wear proper eye protection and fire-resistant gear when building and operating a spot welder.
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