Coated pole piece drying and tempering process based on constant-temperature contact and variable-temperature radiation heating

Through a single heating roller combined with variable temperature radiation heating assembly and thermally conductive liquid heating, the multi-roll segmented drying equipment has been solved, and the efficient, uniform and stable baking effect of electrode sheet production is achieved, meeting the requirements of energy conservation and emission reduction.

CN120502476APending Publication Date: 2025-08-19国兴(东莞)新能源科技有限公司
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Patent Information

Application Number
CN202510769242.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2025-03-08
Filing Date
2025-06-10
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

In the production of existing lithium battery electrodes, the multi-roll segment drying method has problems such as large equipment footprint, high energy consumption, uneven heating and unstable production quality, which is difficult to meet the needs of compact production line design and energy conservation and emission reduction.

Method used

A single heating roller is used to combine a variable temperature radiation heating assembly to coat the outer layer of the material through contact heating and heat the inner layer by heat radiation, combined with a fixed mounting plate and thermally conductive liquid heating, to achieve uniformity and stability of segmented heating, and reduce the equipment footprint and energy consumption.

Benefits of technology

It improves the baking efficiency and heating uniformity of the electrode sheet, reduces the risk of excessive shrinkage rate and plastic deformation of the electrode sheet, meets the needs of energy conservation and emission reduction, and improves production quality and consistency.

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Abstract

The invention relates to the technical field of pole piece manufacturing, in particular to a coated pole piece drying and tempering process based on constant-temperature contact and variable-temperature radiation heating, which comprises the following steps: unwinding a pole piece, and coating one surface of the pole piece; the coated pole piece is wound on a heating roller, a plurality of heating assemblies used for emitting heat radiation are arranged on the side, making contact with the pole piece, of the heating roller in the perimeter direction of the heating roller, the heating assemblies are divided into a plurality of temperature changing sets in sequence, the temperature of the heating assemblies under each temperature changing set is adjusted and controlled, and the heating roller and the heating assemblies conduct the baking procedure synchronously. The device has the effects that the baking efficiency and the heating uniformity of the coating material are improved, the function of segmented heating is achieved, and the risk that drying is discontinuous or the pole piece shrinkage rate exceeds the standard is reduced.
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