Lithium ion battery coating process pole piece drying system and process method thereof

Abstract

The invention discloses a lithium ion battery coating process pole piece drying system and a process method thereof. The pole piece drying system is composed of a hot air station, a hot air conveying control system, a coating machine drying oven and a coating machine control system, wherein the hot air station is connected with the hot air conveying control system through a hot air conveying pipeline; the hot air conveying control system is connected with the coating machine drying oven through a drying oven lower hot air supply pipe and a drying oven upper hot air supply pipe; and each electrical control element in the pole piece drying system is connected with the coating machine control system through a system control circuit. According to the lithium ion battery coating procedure pole piece drying system and the process method of the pole piece drying system, the energy utilization rate is high, fuel combustion is adopted to obtain heat energy, compared with direct resistance heating, the energy utilization rate is high, the energy consumption is low, the cost is low, the cost for obtaining the same heat is 30%-55% lower than that of electric heating, the system is more environmentally friendly, and on the whole, the gas combustion emission is far lower than the emission of fire coal for producing the same electric energy.

Description

technical field [0001] The invention relates to the field of production of lithium-ion batteries, in particular to a drying system for pole pieces in the coating process of lithium-ion batteries and a process method thereof. Background technique [0002] In the production and preparation process of lithium-ion batteries, in the front-end coating process, the pole pieces need to be dried after coating on the coating head. At present, the mainstream drying equipment is a tunnel-type long oven, which consists of several single-section ovens connected in series. According to the drying requirements, the temperature of each oven can be set separately. The heating method is electric heating. The blower outside each oven blows air into the oven. Under the action of the electric heating rod, the cold air is heated to become hot air, and the electrode coating slurry The solvent in the hot air field is evaporated and taken away by the flow of the hot air field to achieve the purpose o...

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Problems solved by technology

[0007] Through the analysis of the data in Table 1, it can be seen that the conversion of chemical energy into thermal energy to dry pole pieces through direct combustion and oxidation of fuel is a good way to save energy and reduce consumption. Moreover, with the development of thermal engineering in our country, the efficiency of heat engines is getting better and better. The higher the temperature, the better the safety, the more advanced the heat engine control technology, the electrification, automation and computer technology have become the basic application technologies. Of course, the use of fuel combustion to obtain heat energy to dry pole pieces must solve several problems: ①Heat carrier Can not contain material components that react with the slurry; ②The efficiency of the thermal system should be improved as much as possible; ③How to realize the temperature field and wind field distribution in the oven; ④How to realize the precise control of the temperature; ⑤How to realize environmental protection production

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