Electrode slice preparation apparatus and electrode slice preparation method

Abstract

The invention discloses an electrode slice preparation apparatus. The electrode slice preparation apparatus comprises an unwinding mechanism, a coating mechanism, a drying mechanism, a pressing mechanism and a winding mechanism, wherein the unwinding mechanism comprises a first unwinding device used for unwinding a current collector, and a second unwinding device used for unwinding a support base material; a through hole is formed in the current collector; the coating mechanism comprises a back-up roll and a coating apparatus that are tangent; the current collector and the support base material are fitted and then the fitted current collector and the support base material pass through the space between the back-up roll and the coating apparatus; the drying mechanism comprises a drying apparatus; the current collector and the support base material pass through the drying apparatus; the pressing mechanism comprises a first pressing roll and a second pressing roll that are tangent; the current collector and the support base material pass through the space between the first pressing roll and the second pressing roll; and the winding mechanism comprises a first winding apparatus for winding the current collector and a second winding apparatus for winding the support base material. According to the electrode slice preparation apparatus, the current collector and the support base material are mutually fitted through the back-up roll; and the overall tensile strength of the fitted current collector and the support base material is greatly increased. The invention also discloses an electrode slice preparation method.

Description

technical field [0001] The invention relates to the field of energy storage device preparation, in particular to an electrode sheet preparation device and an electrode sheet preparation method using the electrode sheet preparation device. Background technique [0002] In recent years, with the gradual promotion of the concept of environmental protection and low carbon, clean energy technology has once again become a hot spot for technological innovation. Among them, energy storage devices such as lithium-ion batteries, supercapacitors, and lithium-ion capacitors are considered to be effective solutions to meet people's energy needs in industry and life. [0003] In order to increase the energy density of energy storage devices such as lithium-ion batteries, supercapacitors, and lithium-ion capacitors, higher voltages are required. In order to increase the working voltage of the energy storage device, it is preferable to use pre-doping technology to reduce the potential of t...

AI Technical Summary

Problems solved by technology

[0004] However, when the electrode slurry is coated on the current collector material having through holes, the electrode slurry will leak to the back side of the current collector material through the through holes, and the electrode slurry transferred to the back side will remain unevenly on the support. On the roller, which in turn leads to the formation of spotty and discontinuous electrode films on the back, making it difficult to form electrodes with good planarity

[0005] In addition, the current collector with through holes has a large number of hole structures in the vertical surface direction, which will inevitably lead to a significant reduction in the tensile strength of the current collector.

When preparing electrode sheets, since the strength of the current collectors decreases with the formation of through holes, the current collectors are easily broken during the operation of coating the active material slurry on the current collectors, resulting in poor production efficiency of the electrode sheets. lower

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