Lithium battery gravure coating machine drying system using multiple heat pumps

Abstract

The invention relates to a lithium battery gravure coating machine drying system using multiple heat pumps. The system comprises a drying way, heating modules, exhaust modules and a heat pump main machine; the multiple heating modules are arranged in the length direction of the drying way, and are used for providing hot air to the drying way; the multiple exhaust modules are arranged in the lengthdirection of the drying way, and are used for exhausting air of the drying way; and one heat pump main machine is provided, is connected with each heating module, and supplies heat to each heating module. Compared with the prior art, on the basis of adopting a heat pump cycle as a heat source, heat exchange parts are arranged nearby each air port in a scattering manner, so that the gravure coating machine drying system can achieve higher-range energy conservation.

Description

technical field [0001] The invention relates to a drying system for a lithium battery gravure coater, in particular to a drying system for a lithium battery gravure coater using a multi-connected heat pump. Background technique [0002] The positive and negative electrode materials of lithium-ion batteries need to be coated with a layer of conductive agent on both sides to increase the adhesion between the coating and the foil and reduce the resistance value. Lithium battery factories generally use a gravure coater to complete this process, which is a special machine for quantitatively coating a layer of specific functional coatings on the surface of the rolled substrate. After the lithium battery electrode material is coated by a gravure coater, the moisture in the conductive agent needs to be dried in dry air at 50°C to 70°C to complete the coating process (CN 106626725A). [0003] According to the disclosed technical solution, electric heaters are usually used to directl...

AI Technical Summary

Problems solved by technology

[0003] According to the disclosed technical solution, the gravure coating machine usually uses an electric heater to directly heat the air, and the high-temperature drying air takes away the moisture in the slurry. The drying by electric heating consumes a lot of energy and the production cost is high.

CN202447268U discloses a coating drying device that assists drying by an infrared drying device to improve the dryness of the coating, but the infrared device cannot increase the heating capacity per unit electric energy

However, CN 103381005 A adopts the mode of centrally heating the air and then supplying air to each air outlet. The long-distance air supply will cause serious heat loss and high fan power consumption.

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