Drying oven device for lithium battery pole roll

Abstract

The invention discloses a drying oven device for a lithium battery pole roll. The drying oven device for the lithium battery pole roll comprises a drying oven cavity body, a shaft rod, heating pipes and flow guide plates; a drying oven cavity is defined by the drying oven cavity body; the shaft rod is arranged in the drying oven cavity in an extending mode in the front-back direction; the heating pipes comprise a first heating pipe and second heating pipes; the first heating pipe is arranged in the shaft rod in an extending mode in the front-back direction; the plurality of second heating pipes are arranged in the drying oven cavity body so as to uniformly heat the lithium battery pole roll; the flow guide plates comprise a top flow guide plate, a bottom flow guide plate, a left side flow guide plate and a right side flow guide plate which are correspondingly arranged on the top wall, the bottom wall, the left side wall and the right side wall of the drying oven cavity respectively; and nitrogen is guided into the oven cavity from the left side flow guide plate and the right side flow guide plate and guided out from the top flow guide plate and the bottom flow guide plate. According to the drying oven device for the lithium battery pole roll, and the temperature uniformity of the lithium battery pole roll is good when the lithium battery pole roll is baked in the drying oven device.

Description

technical field [0001] The invention relates to the technical field of lithium battery pole roll baking, in particular to a lithium battery pole roll oven device. Background technique [0002] Lithium batteries have many advantages such as high energy density, long cycle life, and low self-discharge rate. With the increasing demand for lithium batteries in the power field and energy storage field, the lithium battery industry has developed rapidly in recent years. At the same time, the requirements for lithium batteries are getting higher and higher, especially in the requirements for the consistency and high battery life of lithium batteries; according to different structures, lithium batteries can be divided into three categories: cylindrical, square, and soft packs; although There are big differences in the cell assembly procedures of the three types of lithium batteries, cylindrical, square, and soft packs, but the electrode processing technology before cell assembly is ...

AI Technical Summary

Problems solved by technology

The purpose of baking is to remove the moisture in the pole piece, so that the moisture in the pole piece meets the standard required by the product; if the moisture exceeds the standard, it may cause the moisture to contact the electrolyte, resulting in a reaction between the electrolyte and the moisture, causing the cell to be damaged. Flatulence; From the perspective of battery performance, if the moisture exceeds the requirement, it will cause low voltage of the battery and reduce the cycle life of the battery; the baking process heats the oven cavity to heat up the pole roll to effectively remove moisture; In addition to the requirements for moisture residue, it is also required that the moisture consistency in the same pole roll be kept as consistent as possible; if the moisture consistency in different areas (inner, middle, and outer) of the same pole roll is not good, then the electricity produced by the same pole roll The performance consistency of the core is relatively poor

[0004] Among the existing lithium battery coil oven devices, most of them use vertical ovens; a single oven has multiple cavities, and the existing oven operation process is: 1. The heating stage; the axis and the furnace wall heating tube are opened , to create a convective airflow in the cavity, so that the entire pole roll is heated to the set requirements; second, the vacuum uniform temperature stage; stop heating, and vacuum the cavity to meet the set requirements; third, the cooling stage; The pole roll is cooled; under the existing lithium battery pole roll oven device and baking process, the problem that is prone to occur is: in the heating stage, the temperature uniformity outside the pole roll is not good, and when the temperature on the outside of the pole roll is conducted inward Inhomogeneity, which leads to poor moisture consistency of the pole roll; and in the heating stage, the factor causing poor temperature uniformity outside the pole roll is the structural design of the convective airflow inside the oven

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