Drying system using overlapped multi-connected type heat pumps

Abstract

The invention relates to a drying system using overlapped multi-union type heat pumps. The drying system comprises a drying tunnel, lower heating assemblies, upper heating assemblies and a heat pump main machine. The lower heating assemblies are located below the drying tunnel, and the multiple lower heating assemblies are arranged in the length direction of the drying tunnel and used for providing hot air for the drying tunnel. The upper heating assemblies are located on the upper part of the drying tunnel, and the multiple upper heating assemblies are arranged in the length direction of thedrying tunnel and used for providing hot air for the drying tunnel. One heat pump main machine is arranged, is connected with each lower heating assembly and each upper heating assembly and supplies heat to each lower heating assembly and each upper heating assembly. Compared with the prior art, overlapped heat pump cycle is adopted so that the drying high-temperature requirement can be met; the multi-union type heat exchanger arrangement and the connecting pipe network are adopted, and the situation that air is heated in a centralized manner and then is distributed through air pipes is not needed; and fresh air is preheated through subcoolers, and the circulation efficiency is improved.

Description

technical field [0001] The invention relates to a drying system for a lithium battery pole piece coating machine, in particular to a drying system using a cascade multi-connection heat pump. Background technique [0002] The drying process of lithium-ion batteries is one of the key processes in the entire battery manufacturing process and plays a decisive role in battery performance. The investment of a coating machine mainly depends on the drying technology, the drying efficiency directly determines the coating line speed, and the drying uniformity affects the coating quality. The purpose of the drying process is to remove from the coating those ineffective solvents (carriers) that are used to suspend, dissolve or disperse the active components (polymers, binders, etc.) inside the coating, so that the wet coating becomes Even dry coat. In the lithium battery production process, the drying process of the battery pole piece is the most demanding, and its optimum drying temp...

AI Technical Summary

Problems solved by technology

However, if this solution is directly applied to the heating of the lithium battery pole piece drying tunnel, the problems of serious heat loss and high power consumption of the fan cannot be avoided

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