Introducing the ooitech - 1300 BC String Welding Machine: A Leap Forward in Solar Cell Technology

View：4952024-09-25 11:09:00　From: Looking for Solar Panel Production Line?

I. Introduction

With the continuous advancement of photovoltaic technology, Back Contact (BC) battery technology has garnered widespread attention as a high-efficiency battery solution. By placing all electrodes on the back of the battery, BC technology eliminates shading on the front surface, thereby enhancing the light-to-electricity conversion efficiency. This document introduces the ooitech - 1300 BC String Welding Machine, which is not only suitable for welding BC series battery strings but also compatible with various battery types, including Multi-Busbar (MBB), Passivated Emitter and Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCon), and Heterojunction with Intrinsic Thin-layer (HJT).

II. Background on BC Battery Technology

1. LONGi HPCB
   LONGi's HPCB (High-Performance Back Contact Battery) represents a cutting-edge BC battery technology. It employs advanced structural design and manufacturing processes, achieving high light-to-electricity conversion efficiency and reliability. The HPCB battery enhances performance while reducing costs, providing new impetus for the growth of the solar industry.

2. Aiko ABC
   Aiko's ABC (All-Back-Contact) battery technology is an innovative approach that achieves high conversion efficiency through an entirely back contact structure. The ABC battery boasts high open-circuit voltage and fill factor, maintaining stable performance under varying light conditions, making it a competitive BC technology.

3. Yellow River Hydropower IBC
   The IBC (Interdigitated Back Contact) battery from Yellow River Hydropower is a unique forked back contact technology. It employs specialized electrode structure and manufacturing techniques to enhance short-circuit current and fill factor, reducing production costs while increasing efficiency—highlighting its potential within BC technology.

III. Equipment Overview

1. Basic Description
   The ooitech - 1300 BC String Welding Machine features a comprehensive structure that includes:

   • A/B dual battery loading boxes
   • A/B soldering/gluing control systems
   • Loading translational robotic arm
   • Battery transport platform
   • Battery flipping device
   • CCD + four-axis robot detection and positioning system
   • Welding tape handling mechanism
   • Welding transport platform
   • Infrared temperature control heating system
   • String EL detection system
   • Discharging mechanism

   The working principle involves the robotic arm fetching the battery, followed by a series of processes including soldering/gluing, detection, tape handling, and finally welding on the welding transportation platform, concluding with discharging and inspection.

2. Applicable Battery Technologies
   The machine is specifically optimized for BC series battery strings, accommodating HPBC, IBC, ABC, XBC, and other BC battery types, including LONGi HPCB, Aiko ABC, and Yellow River IBC. Furthermore, the device supports MBB, PERC, TOPCon, HJT, and various battery types due to its adaptable loading system, high-precision detection, and adjustable welding parameters.

IV. Equipment Hardware Specifications

1. System Composition

   • A/B Dual Battery Loading and Soldering/Glazing
     Equipped with two loading positions, featuring high-precision dual-station platform and soldering/gluing systems driven by linear motors and ball screws. The loading box is adjustable for sizes below 210mm, with an alarm function for empty loading boxes.
   • Loading Translational Robotic Arm
     Driven by a servo motor, utilizing steel rail belt modules and high vacuum suction cups, with a detection function to ensure successful battery retrieval.
   • Battery Transport Platform
     Driven by a servo motor and reducer, includes a pre-positioning mechanism for the battery.
   • Battery Flipping Mechanism
     Driven by a servo motor and reducer, employing silicone vacuum suction cups.
   • CCD + Four-Axis Robot Detection System
     Utilizing SCARA four-axis robots and 800W pixel industrial cameras, achieving positioning precision of ±0.15mm, capable of detecting defects and placement errors.
   • Welding Transport Platform
     Driven by a servo motor and reducer, using Teflon belts with independently controlled temperature zones, equipped with real-time temperature monitoring and PID temperature control systems.
   • Infrared Heating Module
     Utilizing infrared lamps and a specialized high-precision temperature control module.
   • Welding Tape Handling Mechanism
     Includes ten sets of unwinding devices and tape detection systems, with front and rear pressure modules.
   • Welding Tape Claw Mechanism
     Driven by a servo motor, using high-precision linear guide modules with 19 sets of tape claws.
   • String EL Detection System
     Utilizing three cameras, with a maximum detection length of 1800mm.
   • Discharging Mechanism
     The discharging conveyor belt is driven by a servo motor and reducer, utilizing PU belt transmission; the battery string discharging mechanism is driven by a servo motor using synchronous belt transmission, featuring independently controlled suction cups and clean paper suction cups.
   • Software Control System
     Self-developed software for easy optimization and upgrades, featuring a user-friendly interface, allowing for trajectory editing and parameter setting, with graded password protection.
   • Base Frame
     Constructed from steel.

2. Main Components List

   • Steel frame made of Q235 (China) for the chassis.
   • PLC from Huichuan/QT550 (China) for overall control.
   • Proximity switches from OMRON for mechanical arm positioning.
   • Pneumatic components from AIRTAC/SMC for the system.
   • Air switch from Chint for control systems.
   • AC contactors from Chint for control systems.
   • Control card from local Chinese manufacturers.
   • Servo motors from Huichuan/Xinjie for X/Y modules.
   • Touch screen from Kunlun Tongtai/Huichuan for control systems.
   • Rails and screws from WON for X/Y modules.
   • Four-axis robots from local Chinese manufacturers for battery positioning.
   • Cameras from Hikvision/Dahua for CCD detection.
   • Infrared welding lamp box custom manufactured in China for battery and tape welding.

V. Equipment Technical Parameters

Parameter	Specification
Production Capacity	≥1000 PCS/H
Positioning Accuracy	±0.10 mm
Maximum Operating Speed	1000 mm/s (adjustable)
Applicable Battery Size	166210 * 30166 mm
Maximum String Length	1800 mm
Welding Method	Tape welding
Soldering/Glazing System	2 sets
Battery Inspection	CCD camera (defect detection)
Placement Accuracy	±0.2 mm
Spraying Medium	Solder paste or conductive glue
Battery Breakage Rate	≤0.2% (Grade A cells)
Equipment Failure Rate	≤3%
Loading Method	Automatic loading
Electrical System	PLC + Touch Screen + Servo + Modules
Human-Machine Interface	Touch screen with user-friendly interface
Fault Alarm	Real-time fault alarm
Equipment Color	Main body white

VI. Summary of Equipment Advantages

1. High Precision
   The equipment offers high precision in battery fetching, positioning, and welding. With positioning accuracy of ±0.10 mm and placement accuracy of ±0.2 mm, the quality of the battery strings is ensured.

2. Strong Compatibility
   The machine is compatible with various BC technologies, including LONGi HPCB, Aiko ABC, and Yellow River IBC, and supports MBB, PERC, TOPCon, and HJT, providing solar companies with flexible production options.

3. Efficient and Stable
   With a production capacity of ≥1000 PCS/H and a failure rate of ≤3%, this equipment meets the demands of large-scale production while ensuring stability throughout the manufacturing process.

4. Intelligent Design
   The machine features a self-developed software control system with a user-friendly interface that allows easy parameter setting and trajectory editing, alongside real-time fault alarms to facilitate maintenance and management.

For further details and insights into our innovative solutions, you can explore our YouTube channel and check out our MBB Full Automatic solar panel production line video. To download our product catalog and company profile, visit this link and this link respectively. For inquiries, contact us at [email protected] or through WhatsApp at +8615961592660.

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