LITHIOTEC Industrial Battery Technology Solutions
LITHIOTEC Industrial Battery Technology Solutions

Sunkko 737DH

The 737DH is a dual-head spot welding machine designed for high-efficiency battery pack assembly. It provides stable, precise, and consistent welding for multiple cells simultaneously, improving productivity and reliability.
Sunkko 737DH battery spot welder with digital display for lithium battery pack and nickel strip welding

Sunkko 737DH

AC SPOT WELDING MACHINES
Dual-Head Precision for Faster Welding.

The Sunkko 737DH is built for high-precision battery spot welding with advanced controls and dependable performance. Its durable design and stable output ensure clean, consistent welds, making it ideal for lithium battery pack assembly, repair, and professional manufacturing applications.

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Download Datasheet

Key Specifications

Model name
737DH
Power supply
AC 110V/220V±20V
Output power
4.3KW (Max.)
4 Pulses time
2~20ms

Key Features

  • Delayed welding function with 3-level power adjustment for precise welding.
  • Real-time current display to monitor output.
  • Supports fixed and mobile spot welding methods.
  • External foot switch for precise control.
  • Adjustable welding head pressure for reliable welds.
  • 2/4/6/8 pulse selection for strong welding points.
  • Automatic inductive discharge for fast welding of large battery packs.

Applications

  • Lithium battery pack
  • Strain gauge
  • Stainless steel mesh
  • Circuit board
  • Portable charger

Technical Specifications

Double pulses time 1~10ms
Welding thickness 0.15~0.35mm(fixed head)/0.05~0.25mm(spot welding pen)
Welding current 120~1200A
Welding needle spacing 2~7mm
Size of welding pin ∅1.5mmX7mm
Total length of ≈580mm
Welding pen cable area 16mm2
Weight Approx. 1.4 kg

Downloads & Documentation

User Manual
User Manual
2.20 KB

Compare with Other Models

Specification Sunkko 737DH Sunkko 709A Sunkko 709AD+
Double pulses time 1~10ms — —
Welding thickness 0.15~0.35mm(fixed head)/0.05~0.25mm(spot welding pen) 0.05-0.35mm(Fixed head)/0.05-0.2mm(Spot welding pen) 0.05-0.35mm(Fixed head)/0.05-0.2mm(Spot welding pen)
Welding current 120~1200A — 50~800A
Welding needle spacing 2~7mm — —
Size of welding pin ∅1.5mmX7mm — —
Total length of ≈580mm — —
Welding pen cable area 16mm2 — —
Weight Approx. 1.4 kg — —

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Technische Unterstützung für industrielle Lithium Ionen Batteriezellen und moderne Batteriesysteme