An induction heating device and method for electrode paste solidification sintering

By generating eddy current heating in the electrode slurry layer through an induction heating device, combined with real-time temperature control and atmosphere protection, the problems of high energy consumption, uneven temperature and high pollution risk of traditional infrared heating methods are solved, realizing the production of photovoltaic cells with high efficiency, low cost and small footprint.

CN122230944APending Publication Date: 2026-06-19SUZHOU HAOJIAN AUTOMATION SYSTEM CO LTD
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Patent Information

Application Number
CN202610390562.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing photovoltaic cell electrode slurry curing and sintering technology relies on traditional infrared radiation heating methods, which suffer from high energy consumption, poor temperature uniformity, high pollution risk, slow response, and large footprint, making it difficult to meet the needs of efficient, low-cost, and highly flexible industrial production of photovoltaic cells.

Method used

An induction heating device is used to generate eddy currents in the electrode slurry layer through the induction heating component. Combined with the temperature control monitoring component, the output power of the heating power supply is adjusted in real time to achieve rapid and accurate temperature control. The sintering environment is controlled by the atmosphere protection component, and the cooling component is used for rapid cooling.

Benefits of technology

It significantly improves thermal efficiency, reduces equipment footprint, ensures temperature uniformity and production flexibility, avoids pollution risks, and enhances the conversion efficiency and product consistency of photovoltaic cells.

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Abstract

This invention belongs to the field of photovoltaic cell manufacturing technology and discloses an induction heating device and method for the curing and sintering of electrode paste, solving the problems of high energy consumption, poor temperature uniformity, high pollution, and slow response of traditional infrared heating. The device includes five main components: induction heating, load-bearing conveying, temperature control monitoring, etc. The induction heating power supply has a frequency of 30 kHz-80 kHz and a power of 5 kW-200 kW. The temperature control component regulates power in a closed loop, and the atmosphere protection component controls oxygen to ≤100 ppm. The method involves controlling the sintering atmosphere and activating the magnetic field to uniformly feed the silicon wafer substrate into the induction zone, causing the electrode paste layer to heat up at 50-300℃ / min, curing at 50-300℃, sintering at 700-900℃, with temperature fluctuations ≤±3℃ throughout the process, and finally precisely cooling to room temperature. This invention achieves selective heating of the paste, high thermal efficiency, and miniaturized equipment, adapting to high-efficiency photovoltaic cells and new pastes, improving cell conversion efficiency and product consistency, and reducing production risks.
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