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High-Speed Stringer Machine

1.Compatible with 166-230 (3BB-20BB) cells. 2.Fragmentation Rate ≤0.25% 3.Uptime ≥ 95% 4.Capacity: half cell>6000 PCS/H


Details Introduction


CTM72 multi-busbar photovoltaic string welding machine is an automated production equipment that can weld monocrystalline and polycrystalline silicon solar cell strings, and is compatible with 166-230 (3BB-20BB) cells. The string welding module can be transformed to produce 166-230 (full, half, 1/3) cells. The equipment uses various advanced automation technologies such as PLC, servo, linear motor, four-axis industrial robot, machine vision, etc. to achieve fully automatic processing from cell loading to cell string unloading.

 

Use high-precision industrial camera for cell detection 

Adjust cells based on CCD detection results

to align the main grid line  with the solder ribbon.

Breakage rate ≤ 0.25%, Grade A solar cell

Suitable for welding 3 to 20 grid cells,

upgradable to a maximum of 25 grids.

Teflon conveyor belt in the welding area , high temperatures resistant and non-stick, single-sided support

166~210 cells:

half cell>6000 PCS/H.

Parameter


Equipment Specification

Model  High-Speed Stringer Machine CTM72
Uptime Rate ≥ 95%
Capacity 166-230 cells: half cell>6000 PCS/H
Average Laser Power 50 W/300W
Laser Lifetime/Warranty 20000 H
Laser Grooving

Adjustable groove depth: 0-65%

 width: <40μm

length: <2mm (standard 1.5mm)

Grooving position accuracy: ±100μm

Fragmentation Rate ≤0.25%
Detection CCD
Flux Method Solder ribbon dipping
Welding Method Infrared welding
Comprehensive Positioning Accuracy Positioning deviation: ≤±0.1mm, angle deviation: ≤±0.04°
Temperature Control Accuracy ±7.5℃
Size

166-210mm solar cells

and corresponding half-cell and 1/3 cells

Number of Main Grid Lines 3BB-20BB (25BB expandable)
          Cell Pad Spacing

The distance between the pad points on the upper and lower edges and the edge of the battery cell>5.5mm

Cell Thickness 170µm~200µm
Maximum String Length 1400mm
Head and Tail Welding Strip Extension Length The first and last strings can set their extension lengths separately
String straightness error ±0.5mm
Welding Tension

Welding tension ≥ 2.0N (0.6mm flat solder strip, solder paste-brushed cell, each grid line is allowed to have at most one point < 2.0N);

(0.6mm wide flat solder strip)

Positioning Accuracy Positioning accuracy: X, Y ≤ ± 0.1mm, angle ≤ 0.04°
Cell Defect Detection Detect defects such as missing corners, broken edges, cracks, screen printing deflection and offset, etc.
Substrate Exposure  ≤±0.3mm
Pitch 1mm~5mm
Piece Spacing Accuracy ±0.3mm
Welding Position Set as needed
Cell String Output Interface Can be connected to Lay-up Machine or used as a Single Machine
Cell Box Maximum Capacity 360 small solar cells
String Visual Inspection All cell strings show consistent soldering conditions and meet visual requirements
String EL Inspection Poor soldering,Micro-cracks and other soldering abnormalities
Defective Rate of String ≤3%
Overlap Rate ≤15%
Ribbon Specifications

Round welding wire types:

φ0.29 to φ0.45mm, dimensional tolerance ≤±0.01

Yield strength: 70~80MPa; Tensile strength: ≥150MPa

Elongation: ≥25%

Leaded and Lead-Free Leaded (lead-free compatible)
Ribbon Parameters

Average thickness of tin layer on one side: ≥0.018±0.005mm

Purity of copper substrate: ≥99.97%

Elongation: ≥20%

Tensile strength: ≥150MPa

Yield strength: ≤70MPa

Ribbon Spool Specifications

Inner Hole Diameter (I.D.) of Spool Core: 16mm or 20mm

Maximum Outer Diameter (O.D.): ≤180mm

Maximum Spool Width: ≤160mm

Power Supply

Three-phase 380V, 50Hz

three-phase five-wire system (L1/L2/L3/N/PE), incoming line specification 4x16mm2+1x10mm2

Power Average power 40KW, peak power 60KW
Cooling Water System for Cell Cracking  Pure water; average flow rate 8L/min, pressure 3bar, temperature 25℃, pipe diameter φ12mm
Gas Source

Pressure 0.6-0.8Mpa; Air consumption: ≥1200L/min; The air intake manifold uses two φ16mm hoses to intake air at the same time

Compressed air quality requirements:

Maximum solid particles: 15μm (level 3); Minimum pressure dew point: +3℃ (level 4); Maximum oil mist concentration: 5mg/m3 (level 4)

Exhaust System

The diameter of the top exhaust pipe is Φ102mm, and the pipe diameter is required to be 104mm; the comprehensive exhaust flow rate is greater than 600m³/h;

the exhaust gas temperature is relatively high, and PVC pipes are recommended for the exhaust pipe

Site

The floor load of the installation site is not less than 600kg/m2, the ground is flat and vibration-free.

The installation (including operation) space is not less than 10000 (length) × 3500 (width) × 2650 (height) mm.

Ambient temperature: 5 - 40℃

Relative humidity: 5 - 70% (no condensation)

The installation (including operation) space is not less than

Ambient temperature: 5 - 40℃

Relative humidity: 5 - 70% (no condensation)

PLC Beckhoff compact industrial PC
HMI The Easy Control Heaven and Earth host computer software includes parameter settings, fault diagnosis, alarms, product statistics, status records, etc.
Robot The robot safety interface and equipment emergency stop use safety relay linkage to ensure personnel safety
MES Interface Reserved Ethernet port, supporting TCP/IP and Beckhoff ADS protocols

Keyword:

High-Speed Stringer Machine

Production Strength

Factory Capabilities
Factory Capabilities
Factory Capabilities
Factory Capabilities
Factory Capabilities
Factory Capabilities
Factory Capabilities

Is BC technology the Future?

BC (Back Contact) technology is undoubtedly a key direction for next-generation high-efficiency PV modules. Its busbar-free front side offers not only superior aesthetics but also significantly reduces shading, leading to higher light absorption and increased power output. Rather than simply declaring BC as the only future,In fact, BC is a platform technology that can be combined with techniques such as Topcon HJT and perovskite tandem cells to squeeze out the last drop of efficiency gains.

Therefore, we believe BC technology will remain at the forefront of the upcoming technological transformation, making now the opportune moment to invest in BC.

Why We Say "NO" to Fast Quotes ?

Whilst we offer some of the most competitive pricing in the industry, we firmly believe that a well-designed production line holds far greater value than the mere pursuit of low cost. A single quotation cannot suit all. Only after gathering the necessary information and undertaking a bespoke design tailored to each product's characteristics and process requirements can we provide a quotation truly worthy of discussion.

What Information is Required to Establish a Production Line?

This is straightforward.

Firstly, we need to understand the type of modules you wish to manufacture: conventional or flexible, large-format or small-format, and whether any specialised processes are required. Secondly, we require details of your production line capacity requirements – be it a 50MW manual line or a 2GW fully automated dark factory.

Finally, if you have already constructed a facility for your project, we need to know the dimensions of the building; a CAD file would be most helpful if available. Naturally, should you be unfamiliar with photovoltaic module manufacturing, there is no need for concern. We shall recommend the most suitable production line design based on your market requirements.

What is Our Collaboration Process?

We consider after-sales service the beginning of a long-term partnership, not the end of a transaction. We provide a full-spectrum "service ecosystem" that covers the entire journey from initial discussion to stable mass production.

1.Collaboration and Delivery Process

Requirement Confirmation & Technical Discussion: We start with in-depth communication to clarify product specifications, capacity goals, and technical requirements, providing a preliminary technical solution.

2.Plan Finalization & Contract Signing: Upon reaching a technical consensus, we proceed to draft and sign the commercial contract and technical agreement.

3.Production Line Construction & Equipment Manufacturing: In parallel, you can proceed with plant construction/renovation, utility preparation, and team building. We simultaneously conduct lean manufacturing and assembly of the equipment.

4.Factory Acceptance Test (FAT): After assembly and debugging, we warmly welcome you to our facility for a pre-acceptance test to verify equipment performance firsthand.

5.Maritime Logistics & On-site Installation: Following FAT, equipment is shipped via maritime logistics to your plant. Our engineer team will be on-site to guide installation and positioning.

6.Commissioning & Site Acceptance (SAT): After installation, our engineers perform precise commissioning and complete the final Site Acceptance Test, ensuring the line meets all agreed performance metrics.

7.Training & Guided Production: We provide comprehensive operation and maintenance training, and guide you through small-batch trial production to ensure your team can operate the line independently.

8.Long-term Support & Continuous Improvement: Our comprehensive long-term after-sales service begins after mass production, including remote support, spare parts supply, periodic visits, and technical upgrade services, ensuring your sustained production and future growth.

 

 

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