Lithium battery pole piece coater drying system adopting heat pump heat recovery and barrel pump circulating

Abstract

The invention relates to a lithium battery pole piece coater drying system adopting heat pump heat recovery and barrel pump circulating. The lithium battery pole piece coater drying system comprises adrying channel, a long air channel, an air discharging assembly, a lower heating assembly, an upper heating assembly, a heat pump system, a host and an air heat exchanger, wherein the lower heating assembly and the upper heating assembly are used for heating the drying channel. The host is used for achieving heat exchange between an air channel of the lower heating assembly and an air channel ofthe upper heating assembly, and the heat pump system is used for conducting heat exchange with fresh air; the air heat exchanger comprises two air flow passages conducting heat exchange mutually; an inlet of the first air flow passage communicates with an air channel of the heat pump system, and an outlet of the first air flow passage communicates with the air channel of the lower heating assembly; and an inlet of the second air flow passage communicates with the air discharging assembly and receives the air discharged by the air discharging assembly, and an outlet of the second air flow passage serves as a discharging opening. Compared with the prior art, the high-temperature requirement of lithium battery pole piece drying is met through heat pump heat recovery and barrel pump circulating, the heating load of the lithium battery pole piece drying system is lowered as far as possible, and meanwhile potential safety hazards are reduced.

Description

technical field

[0001] The invention relates to a drying system for a lithium battery pole piece coater, in particular to a drying system for a lithium battery pole piece coater using heat pump heat recovery and barrel pump circulation. Background technique

[0002] The drying process of lithium-ion batteries is one of the key processes in the entire battery manufacturing process, which plays an absolute 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 ...

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