Solar Panel Sintering Tunnel Furnace

The Solar Panel Sintering Tunnel Furnace is a core thermal processing equipment used in photovoltaic cell production lines. It adopts infrared radiation heating or microwave heating technology to rapidly heat and cool silicon wafers printed with front and rear electrode pastes. This process enables the formation of excellent ohmic contact between the metal paste and silicon wafer, directly affecting the electrical conversion efficiency of solar cells.

Product Applications

Front Silver Paste Sintering:

Used to form front grid electrodes for efficient current collection and photovoltaic power output.

Rear Aluminum Paste Sintering:

Used to form the back surface field (BSF), reducing minority carrier recombination.

Rear Silver Paste Sintering:

Used to form rear busbar electrodes for subsequent welding processes.

Product Parameters

Product Features

Extremely Fast Heating Rate:

The equipment can reach peak sintering temperature within seconds, greatly improving production efficiency.

High Temperature Uniformity:

The horizontal temperature difference is controlled within ±2℃, ensuring consistent sintering quality across the entire wafer surface.

Significant Energy Saving:

Adopts advanced lightweight fiber insulation materials to reduce heat loss and improve energy efficiency.

Highly Stable Operation:

The variable frequency drive transmission system ensures smooth mesh belt movement without vibration.

Intelligent Control System:

PLC combined with touch screen control supports real-time process curve storage and recipe management.

FAQ

Q1: How does the equipment ensure uniform sintering of solar cells?

A1:The system adopts multi-zone independent closed-loop temperature control, combined with precisely distributed infrared heating lamps and high-accuracy thermocouple feedback, ensuring highly consistent temperature distribution across both horizontal and vertical directions inside the furnace.

Q2: Can the belt speed and temperature be adjusted according to different processes?

A2:Yes. The control system includes built-in process recipe management, allowing users to set individual zone temperatures and mesh belt speeds according to the characteristics of different solar cell technologies, such as PERC and TOPCon.

Q3: What maintenance is required during daily operation?

A3:Regular maintenance includes cleaning volatile residues from exhaust pipes, checking infrared heating lamps for aging or damage, and inspecting the tension and lubrication condition of the transmission mesh belt.

Q4: Why does the equipment emphasize "rapid heating and cooling"?

A4:Rapid heating prevents excessive metal diffusion that could damage the PN junction, while rapid cooling stabilizes the metal-silicon alloy structure. This helps achieve optimal ohmic contact and improve solar cell conversion efficiency.

Q5: Does the equipment include exhaust gas treatment functions?

A5:Yes. The equipment is equipped with an efficient exhaust and ventilation system, which quickly removes organic gases generated during the paste sintering process and can be connected to the factory environmental treatment system.