Cutting device

Abstract

To provide a cutting device capable of preferably cutting an electrode.SOLUTION: A cutting device is provided, which comprises a pair of blades and cuts an electrode by engaging the pair of blades, the cutting device includes a contact pressure impartment guide which imparts contact pressure enabling contact of one blade with the other blade upon cutting of the electrode, and guides the one blade to the other blade so that the one blade comes in contact with the other. The contact pressure impartment guide includes a curved portion, and a straight portion which is parallel to a cutting surface of the electrode, and the thickness of the straight portion is larger than that of the electrode. An angle formed by an electrode surface and the straight portion of the contact pressure impartment guide is 90° or more.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a cutting device.

Background Art

[0002] For example, as a cutting device for electrodes of a battery, Patent Document 1 discloses a cutting device that cuts a base material such as cardboard or an iron plate by meshing an upper blade and a lower blade.

[0003] Patent Document 2 discloses a cutting device that includes a cutting blade that advances and retreats with respect to a continuous body of an electrode plate or a separator and cuts the continuous body, and a cleaning member that advances and retreats together with the cutting blade and contacts and cleans the cutting portion of the continuous body.

[0004] Patent Document 3 discloses a cutting device that cuts an electrode by meshing a pair of blades.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] [[ID=!50]] In an electrode cutting device, when cutting an electrode, it is required to suppress the contact between electrode materials and cut the electrode well.

[0007] The present disclosure has been made in view of the above circumstances, and a main object thereof is to provide a cutting device that can cut an electrode well.

Means for Solving the Problems

[0008] The cutting device of this disclosure is a cutting device that cuts an electrode by engaging a pair of blades, It includes a contact pressure application guide that applies contact pressure to enable one blade to contact the other blade when cutting electrodes, and guides one blade to contact the other blade. The contact pressure application guide has a curved portion and a straight portion parallel to the cut surface of the electrode. The straight portion is greater than or equal to the thickness of the electrode. This cutting device has an angle of 90° or more between the electrode surface and the straight portion of the contact pressure application guide. [Effects of the Invention]

[0009] This disclosure provides a cutting device that can cut electrodes effectively. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic diagram showing an example of a conventional cutting device and the electrode to be cut. [Figure 2] Figure 2 is a schematic diagram showing an example of the cutting apparatus and the electrode to be cut according to the present disclosure. [Figure 3] Figure 3 is a schematic diagram showing another example of the cutting apparatus and the electrode to be cut according to the present disclosure. [Modes for carrying out the invention]

[0011] Embodiments of this disclosure are described below. Matters other than those specifically mentioned herein but necessary for the implementation of this disclosure (e.g., the general configuration and manufacturing process of cutting devices not characterizing this disclosure) can be understood as design matters for those skilled in the art based on the prior art. This disclosure can be implemented based on the content disclosed herein and common technical knowledge in the art. Furthermore, the dimensions (length, width, thickness, etc.) shown in the diagram do not necessarily reflect the actual dimensions. In this specification, the symbol "~" indicating a numerical range is used to mean that the numerical values described before and after it are included as the lower limit value and the upper limit value. In addition, any combination of the upper limit value and the lower limit value in the numerical range can be adopted.

[0012] The cutting device of the present disclosure is a cutting device that cuts an electrode by meshing a pair of blades, applying a contact pressure that enables one blade to contact the other blade when cutting the electrode, and including a contact pressure applying guide for guiding one blade to contact the other blade, The contact pressure applying guide has a curved portion and a straight portion parallel to the cutting surface of the electrode, The straight portion is greater than or equal to the thickness of the electrode, The cutting device is such that the angle formed between the electrode surface and the straight portion of the contact pressure applying guide is 90° or more.

[0013] In the prior art, attention has been paid to making the clearance of the blade zero or small, but the cross-sectional shape of the cut object has not been considered. FIG. 1 is a schematic diagram showing an example of a conventional cutting device and an electrode to be cut. The dashed line in FIG. 1 shows the behavior of the upper blade when cutting the electrode. As shown in FIG. 1, in the conventional cutting device, there is no straight portion having a length greater than or equal to the electrode thickness in the guide, and the angle θ formed between the electrode surface and the guide is less than 90°. Therefore, when cutting the electrode, when the upper blade moves along the guide, the cutting surface becomes oblique, the pair of blades cannot be sufficiently contact-pressed, displacement occurs during cutting, contact between the cutting surfaces occurs, etc., and geometrically, the contact between the materials becomes large and a good cross-section cannot be obtained.

[0014] According to the present disclosure, in addition to being able to easily maintain the clearance of the blade, the quality of the cut cross-section can be improved, and the electrode can be cut well.

[0015] FIG. 2 is a schematic diagram showing an example of the cutting device of the present disclosure and an electrode to be cut. FIG. 3 is a schematic diagram showing another example of the cutting device and the electrode to be cut according to the present disclosure. The dashed lines in FIGS. 2 to 3 indicate the behavior of the upper blade during electrode cutting. As shown in FIGS. 2 to 3, in the present disclosure, in cutting an electrode containing a brittle electrode material, by making the straight portion of the contact pressure applying guide (guide guide) equal to or greater than the thickness of the electrode and making the angle θ formed between the electrode surface and the straight portion of the contact pressure applying guide (guide guide) 90° or greater, the occurrence of chipping and dropping of the end portion of the electrode can be significantly reduced. As shown in FIG. 3, in the present disclosure, even when the electrode is cut obliquely, a pair of blades can be sufficiently contact-pressed, suppressing the occurrence of displacement during cutting, contact between the cut surfaces, etc., maintaining the quality of the cut cross-section, and enabling good cutting of the electrode.

[0016] The cutting device of the present disclosure includes a pair of blades and a contact pressure applying guide. The pair of blades are an upper blade and a lower blade. The contact pressure applying guide applies a contact pressure that enables one blade to contact the other blade during electrode cutting, and guides one blade to contact the other blade. The contact pressure applying guide has a curved portion and a straight portion parallel to the cut surface of the electrode. The curved portion may be disposed above the straight portion in the cutting direction. The curved portion may receive one blade (for example, the upper blade) during electrode cutting. The one blade may be guided along the curved portion to the straight portion. The straight portion may guide the one blade guided along the curved portion to contact the other blade. By these series of operations, a contact pressure that enables one blade to contact the other blade during electrode cutting may be applied to the pair of blades. The straight portion may be equal to or greater than the thickness of the electrode from the viewpoint of suppressing the occurrence of chipping and dropping of the end portion of the electrode. The angle θ formed between the electrode surface and the straight portion of the contact pressure applying guide may be 90° or greater.

[0017] The electrode to be cut by the cutting device of the present disclosure has a current collector and an electrode layer disposed on both sides or one side of the current collector. As the current collector, conventionally known current collector materials suitable for use in batteries can be used. The form of the current collector is not particularly limited and can take various forms such as foil-like or mesh-like. The thickness of the current collector varies depending on the shape, but may be in the range of 1 μm to 50 μm, or in the range of 5 μm to 20 μm.

[0018] The electrode layer arranged on one side of the current collector may be a positive electrode layer or a negative electrode layer. The two electrode layers arranged on both sides of the current collector may be one positive electrode layer and the other negative electrode layer, both positive electrode layers, or both negative electrode layers. The electrode layer contains at least an active material, and may optionally contain a conductive material, a binder, a solid electrolyte, etc. Conventional materials known to be usable in batteries can be used as the active material, conductive material, binder, and solid electrolyte. The thickness of the electrode layer is not particularly limited, but for example, it may be 10 to 100 μm or 10 to 20 μm.

[0019] The shape of the electrode in this disclosure may be a rectangular parallelepiped, a cube, a prism, or the like.

[0020] The electrodes of this disclosure may be used as electrodes for a primary battery or as electrodes for a secondary battery. The battery may be an aqueous battery, a non-aqueous battery, or an all-solid-state battery, etc. The applications of the battery are not particularly limited, but examples include power sources for vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), gasoline cars, and diesel cars. In particular, it may be used as a power source for the drive of hybrid electric vehicles, plug-in hybrid electric vehicles, or electric cars. Furthermore, the battery in this disclosure may be used as a power source for mobile devices other than vehicles (e.g., railways, ships, aircraft), or as a power source for electrical products such as information processing devices.

Claims

1. A cutting device that cuts electrodes by engaging a pair of blades, It includes a contact pressure application guide that applies contact pressure to enable one blade to contact the other blade when cutting electrodes, and guides one blade to contact the other blade. The contact pressure application guide has a guide portion and a straight portion parallel to the cut surface of the electrode, A cutting device in which the angle between the electrode surface and the straight portion of the contact pressure application guide is 90° or more.

2. The cutting apparatus according to claim 1, wherein the straight portion is greater than or equal to the thickness of the electrode.

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