Spot Welding Machine Circuit Board Kit for 18650/26650/32650 Lithium Battery

Portable Energy Storage Spot Welder – Smart Auto-Trigger Circuit Board

This spot welding machine circuit board can be used to weld 18650 / 26650 / 32650 and other lithium batteries. Portable, stable, reliable, and durable — connect it to your own car startup battery or high-power battery pack and start welding immediately. Save on production costs!

Smart Auto-Trigger Spot Welding

Equipped with an intelligent spot welding program that automatically controls the welding action — no trigger switch needed. Simply touch the welding pen to the nickel sheet and the spot welding pulse is automatically output. Free your hands and weld effortlessly!

5-Gear Power Adjustment

Upgraded from 3 gears to 5 gears, allowing better adaptation to different battery types, lower-performance batteries, and varying nickel sheet thicknesses. More options, more flexibility.

Optimized Board Design

Improved board structure with a more rational circuit design for enhanced reliability and performance.

Specifications

• Compatible Batteries: 18650 / 26650 / 32650 / LiPo
• System Voltage: 12V – 14.6V
• Working Current: 90A – 150A
• Weldable Nickel Thickness: ~0.1mm – 0.15mm

Suggested Power Supply

• 30–45Ah lead-acid battery (good performance, low internal resistance)
• 3.5–5.5Ah 45C 3S aero model lithium battery pack
• 30–35Ah capacity 18650 battery pack

Note: Ensure your battery can supply more than 90A, otherwise welding may fail. If unsure, extend the wire by ~1 meter using 2.5² or 4² wire to reduce the risk of power tube burnout.

Package Contents

• 1× Main Circuit Board
• 1× Buzzer
• 2× Input Wire
• 2× Output Line with Welder Pen