12V Spot Welding Machine Control Board DIY Set 18650 Cells

Meet the 12V Spot Welding Machine Control Board DIY Set for 18650 cells—an affordable, high-power welding controller designed for precise, repeatable spot welds on thin nickel sheets. With four adjustable power gears, you can dial in the exact current and pulse duration to produce solid, clean weld spots on 0.1-0.15mm nickel-plated sheets used in battery packs. Weighing just 165g and manufactured in Mainland China, this compact control board is ideal for DIY battery builders and hobbyists working with 18650 cells. It supports common 12V power sources such as a car starter or high-rate Li-ion packs, enabling flexible, portable operation. The system features green power indicators that pulse for low, medium, and high power, plus a red steady light for four-speed auto welding, and a buzzer with a welding indicator to confirm each weld. You can choose between the control board alone or the control board with a complete accessory set for immediate use after you provide your own 12V power source.

Benefits & Tips

• Achieve durable welds on 0.1–0.15 mm nickel-plated sheets typical of 18650 battery packs with adjustable four-speed power control.
• Enhance welding consistency by selecting the appropriate gear for the material and desired weld strength; monitor the green LED pulses and buzzer to verify each weld.
• Start fast with the complete accessory kit when you need a ready-to-use setup, including a thickened copper welding pen and tips designed for high current transfer.

Product specifications

• Name: Spots Welding Tool Set (Control Board) – 12V spot welding controller for 18650 cells
• Brand: meterk
• Certification: CE
• Origin: Mainland China
• Max. Welding Thickness: 0.15 mm
• Model Number: Spots Welding Machine Control Board
• Weight: 165 g
• System voltage: 12.0–14.6 V
• Working current: 90–150 A
• Welding thickness (range): 0.1–0.15 mm
• Item size: 75 × 38 mm
• Package size (control board only): 100 × 50 × 20 mm
• Package size (complete set): 120 × 120 × 30 mm
• Accessories: Includes control board, input cables, welding pen, heat shrink tubing, buzzer, electrolytic capacitor, screws & nuts, nickel sheet, and guideline

Package includes:

Control board only

• 1 × Control Board
• 1 × Input Cable
• 1 × Pair of Welding Pen
• 1 × Heat Shrink Tubing
• 1 × Buzzer
• 1 × Electrolytic Capacitor
• 4 × Screws & Nuts
• 1 × Nickel Sheet
• 1 × Guideline

Control board + complete accessory set

• 1 × Control Board
• 2 × Input Cables
• 1 × Pair of Welding Pen
• 2 × Heat Shrink Tubing
• 1 × Buzzer
• 1 × Electrolytic Capacitor
• 4 × Screws & Nuts
• 1 × Nickel Sheet
• 1 × Guideline

Warnings/Reminders

• Note: You need to prepare your own 12.0-volt power supplies.

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