Fully Automatic Single Sided Spot Welding Machine for Cylindrical Lithium Battery Packs

Product Overview

This fully automatic single-sided spot welding system is engineered for high-throughput joining of cylindrical lithium battery packs. It combines independently servo-driven X and Y axes, horizontal two-axis welding motion, a transistor welding power source, and PLC touchscreen control to deliver repeatable weld placement. The equipment supports both regular and irregular cell arrangements where positive and negative welding points are symmetrically arranged, helping manufacturers improve production consistency while reducing manual handling requirements.

The system is suited to modular pack production for energy-storage batteries, electric motorcycles, automotive battery applications, e-bikes, balance vehicles, digital batteries, and power tools. It accommodates common cylindrical cells including 18650, 21700, 16650, 26650, 32650, and 14500 formats. A dedicated customer-configured fixture holds the workpiece, while magnetic nickel-strip retention supports stable movement and accurate positioning through the welding cycle.

Built around a high-strength sheet-metal structure and a spacious working area, this unit is designed for demanding production environments. Coordinate accuracy of 1 wire and repeat positioning accuracy of no more than 0.02 mm support dependable pack assembly over extended runs. Continuous start, breakpoint restart, false-weld and missed-weld alarms, and re-welding functions give operators practical control over yield, traceability, and recovery during production.

Key Features

• Servo-Controlled Two-Axis Positioning: Independent servo motors control the X and Y travel paths, with each weld point assigned its own X and Y coordinate. Horizontal two-axis welding motion supports accurate spot placement across symmetrical positive and negative connection patterns.

• Fast Automated Welding Cycle: Single-point welding speed is at least 0.30 seconds per point when processing 18650 cells. The equipment is rated for single-sided production efficiency of at least 2,000 cells per hour for 18650-based work, supporting high-volume battery-pack assembly.

• Flexible Pattern Programming: The embedded industrial control system supports arbitrary dot-matrix patterns and standard array modes. CAD drawing import helps translate approved pack layouts into machine programs, reducing manual coordinate entry for complex interconnect designs.

• 99 Program Storage Capacity: Up to 99 welding programs can be stored for repeat production. This enables fast changeover between compatible cell layouts and supports controlled processing of multiple pack designs on the same production resource.

• PLC Touchscreen Operation: A PLC-controlled liquid-crystal touch interface provides an accessible operating environment for setup, program selection, and production control. The industrial embedded operating system is designed for automated welding workflows rather than manual spot-welding dependence.

• Process Recovery and Alarm Functions: Continuous start and breakpoint start functions help resume work after an interruption. False-weld and missed-weld alarms, together with a re-welding function, provide operational safeguards for maintaining pack-connection quality.

• 10000 A Transistor Welding Power: The supplied transistor welding power source provides a maximum output current of 10000 A. Adjustable pre-weld current, welding current, rise time, welding time, and falling time provide controlled welding-energy settings for the application.

• Custom Fixture-Based Material Handling: Feeding uses a dedicated fixture manufactured according to the customer's drawings. Precision-machined tooling and magnetic nickel-strip attachment support smooth movement and help preserve welding accuracy during repeated production cycles.

• Nickel Connection Compatibility: The system is specified for welding connection strips from 0.1 to 0.3 mm thick. For strips of 0.20 mm and above, the reference requirement is fork opening and embossed spot preparation, enabling the process to be matched to thicker interconnect material.

• Production-Grade Mechanical Capacity: The X axis provides 0 to 300 mm travel with maximum load capacity of at least 50 kg, while the Y axis provides 0 to 200 mm travel with maximum load capacity of at least 10 kg. This mechanical design supports stable automated motion across the stated operating envelope.

Applications

Technical Specifications

Why Choose This Product

• Designed for automated cylindrical-cell production: The equipment combines fixture-based loading, coordinate-controlled welding, and fast single-point operation to replace variable manual welding steps in battery-pack assembly.

• Built for repeatable positioning: Separate servo control of the X and Y axes, together with specified coordinate and repeat-positioning performance, supports reliable weld location across programmed pack patterns.

• Configured for production flexibility: Arbitrary dot-matrix programming, standard array modes, CAD import, and storage for 99 programs help the same system support a range of cylindrical-cell pack layouts.

• Focused on practical process control: False-weld and missed-weld alarms, re-welding capability, continuous start, and breakpoint restart functions support more controlled operation and recovery during production.

• Matched to customer tooling requirements: Dedicated fixtures are customized from customer drawings, allowing the equipment to be aligned with the physical arrangement of the intended battery module.

Contact us for a quote or a custom fixture and welding configuration tailored to your cylindrical lithium battery-pack production requirements.

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