The Application of Linyi Lanjing Infrared Heating Lamps in Lithium Batteries

Author:

xiaolanjing

In 2025, among the new production lines established by leading domestic battery manufacturers, infrared drying equipment achieved a penetration rate of 78%, with projections indicating it will surpass 90% by 2026. The infrared heating tubes from Linyi Lanjing have become the mainstream heating solution in lithium battery production.

In the coating and drying process of lithium-ion batteries, the speed of drying determines the coating rate, while the quality of drying affects battery performance. Therefore, an effective and high-quality drying technology is crucial. Currently, the baking ovens in coating machines primarily rely on hot air circulation, which presents issues such as high energy consumption during operation, low drying efficiency, and imprecise temperature control. Particularly in the third and fourth stages of drying, the viscosity of the coated slurry is extremely high, making it difficult to increase production rates even when raising the hot air drying temperature. Consequently, the infrared-hot air drying system offers a potential solution to these problems.

Application stages and specific uses of infrared heating lamps

1.Polar Coating and Drying: The rapid drying of coated positive and negative electrodes is the most critical application scenario

2.Diaphragm / Electrode Preheating: Perform preheating treatment on the substrate before coating

3.Cell baking: Uniform preheating of the cell before filling or encapsulation

4.Module / PACK Thermal Pressing: The thermal pressing process in battery module assembly

5.Electrolyte Wettability Assistance: Enhances the wettability of the electrode by the electrolyte

6.Battery recycling powder removal and drying: Drying treatment in the recycling process of used batteries

Linyi Lanjing Optoelectronics' Technical Advantages in Infrared Heating Lamps

1.Non-contact heating: Infrared radiation penetrates directly through the coating layer, achieving "from inside to outside" drying and avoiding the issue of "burned exterior but undercooked interior" seen in traditional hot air methods

2.Strong heat penetration: Capable of penetrating coatings thicker than 300μm, supporting high-solid-content thick coating processes

3.Precise temperature control: With a temperature accuracy of ±1°C and rapid response

4.High energy efficiency: Thermal conversion efficiency exceeds 80%, saving 30%-40% energy compared to traditional hot air

5.Eco-friendly and Clean: Free from NMP/dust pollution, with more thorough solvent evaporation

6.Compatible with high-speed production lines: Supports a high coating speed of 160-240 m/min

Infrared heating lamps, leveraging their core advantages of non-contact, high penetration, rapid response, and high energy efficiency, have become indispensable critical heating components in the production and manufacturing of new energy (lithium batteries + photovoltaics). With ongoing technological advancements (such as graphene infrared modules, VCSEL laser infrared, and intelligent multi-band regulation), their application depth and breadth continue to expand.

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