KR-20260065425-A - Apparatus of cutting electrode

KR20260065425AKR 20260065425 AKR20260065425 AKR 20260065425AKR-20260065425-A

Abstract

The present invention relates to an electrode cutting device. An electrode cutting device according to one aspect of the present invention comprises: a cutting unit for cutting a film-shaped electrode that is transported in one direction in the width direction; and a foreign substance removal unit located at the rear end of the cutting unit with respect to the transport direction of the electrode. The foreign substance removal unit may include: a suction part extending in the cutting direction in which the cutting unit cuts the electrode; a suction part to which negative pressure can be applied; and a connecting part connecting the suction part and the suction part, wherein a first cross-sectional area perpendicular to the cutting direction changes along the cutting direction.

Inventors

이우정
정선용
김준완
김상열
김종한

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (17)

A cutting unit for cutting a film-shaped electrode transported in one direction in the width direction; and It includes a foreign substance removal unit located at the rear end of the cutting unit based on the transfer direction of the electrode, and The above foreign substance removal unit is, A suction portion extending in the cutting direction in which the above-mentioned cutting unit cuts the electrode; A suction part to which negative pressure can be applied; and An electrode cutting device comprising a connecting portion that connects the suction portion and the suction portion, and a first cross-sectional area perpendicular to the cutting direction that changes along the cutting direction.
In Article 1, The suction part is located on one side of the suction part with respect to the incision direction, and The above connection part is an electrode cutting device in which the first cross-sectional area decreases as it moves away from the suction part.
In Article 2, The above suction part is an electrode cutting device extending in a direction parallel to the cutting direction.
In Article 1, The above connecting portion has a second cross-sectional area in a direction parallel to the cutting direction, The above second cross-sectional area is an electrode cutting device that increases toward the electrode side passing through the cutting unit.
In Article 1, An electrode cutting device having a connecting space connecting the suction part and the suction part provided inside the above connecting part.
In Article 5, The above connecting part is an electrode cutting device having a duct shape connecting the suction part and the suction part.
In Article 5, The above connecting part is, A first connecting portion connecting one side of the extension direction of the suction portion and the suction portion; and It includes a second connecting part connecting the other side of the extension direction of the suction part and the suction part, and The first connecting portion is an electrode cutting device that extends at an angle with respect to the cutting direction.
In Article 7, One side of the extension direction of the suction part is an electrode cutting device located on the opposite side of the suction part with the connecting space in between.
In Article 8, At the rear end of the above-mentioned cutting unit, a passage space is provided through which the cut electrode passes, and The first connecting portion is an electrode cutting device that is inclined so as to become closer to the passage space as it extends toward one side of the extension direction of the suction portion.
In Article 5, The above connecting space is an electrode cutting device having a uniform thickness in the above transfer direction.
In Article 1, The above suction part is, An electrode cutting device comprising a cutting unit side opening portion that is open toward the cutting unit side.
In Article 11, The above suction part is, At the rear end of the above-mentioned cutting unit, a passage space is provided through which the cut electrode passes, and An electrode cutting device including a passage space side opening portion that opens toward the above passage space side.
In Article 12, The above-mentioned cutting unit-side opening is connected to the above-mentioned passage space-side opening, forming an electrode cutting device.
In Article 1, The above suction part is an electrode cutting device having a slit shape extending in the cutting direction.
In Article 1, An electrode cutting device further comprising an upper plate and a lower plate positioned at the front of the cutting unit based on the above transfer direction to fix the electrode.
In Article 1, An electrode cutting device comprising a case that accommodates the above-mentioned cutting unit and the above-mentioned foreign substance removal unit, and further includes a case through which an electrode can enter and exit.
In Article 1, The above-mentioned cutting unit is an electrode cutting device comprising a knife extended in the cutting direction.

Description

Electrode cutting apparatus The present invention relates to an electrode cutting device, and more specifically, to a device for cutting an electrode capable of charging and discharging electrical energy. Although secondary batteries have been applied in small-scale fields such as mobile devices and laptop computers, research directions have recently expanded to medium and large-scale fields, and they are widely used in areas requiring high voltage and large capacity, such as Energy Storage Systems (ESS) and Electric Vehicles (EV). Such secondary batteries may consist of an electrode assembly formed by stacking film or sheet-shaped electrodes and a separator, and a case that houses the electrode assembly. Depending on the stacking structure, the electrode assembly can be classified into jellyroll type, stack type, or stack & folding type, and the secondary battery can be classified into pouch type, prismatic type, or cylindrical type depending on the structure of the case. Meanwhile, to manufacture a secondary battery, an electrode having a long length can be cut to a predetermined length. To this end, a separate device may be used to perform a cutting process for cutting the electrode. However, the quality of the secondary battery finally manufactured may be degraded by foreign substances generated or infiltrated during such a cutting process. More specifically, during the electrode cutting process, foreign substances such as those detached or separated from the electrode itself, those detached from the cutting device, or dust originating from the outside may be generated or infiltrate. These foreign substances can adhere to the electrode or separator and cause defects in the electrical characteristics of the secondary battery. For example, these foreign substances may cause low-voltage defects, where the actual voltage of the secondary battery falls below the target voltage. Consequently, there is an urgent need for the development of an electrode cutting device capable of improving process quality by removing foreign substances generated or infiltrating during the cutting process. FIG. 1 is a perspective view taken from above of an electrode cutting device according to an embodiment of the present invention cutting an electrode. In this case, the electrode is indicated by a dotted line, and the configuration visible through the electrode is indicated by a solid line. Figure 2 is a cross-sectional view according to AA of Figure 1. FIG. 3 is a perspective view of a cross-section according to BB of FIG. 1 viewed from above. Figure 4 is an enlarged view of section C of Figure 2. FIG. 5 is a cross-sectional view according to DD of FIG. 2. At this time, the upper and lower views are not shown. FIG. 6 is a perspective view of the cross-section according to FF of FIG. 4 viewed from above. In this case, the first and second cross-sectional areas are indicated as hatched regions. Preferred embodiments of the present invention are described in detail so that those skilled in the knowledge can easily implement them. However, the present invention may be embodied in various different forms and is not limited or restricted by the following embodiments. In order to clearly explain the present invention, detailed descriptions of related prior art that are irrelevant to the explanation or that may unnecessarily obscure the essence of the invention have been omitted. Furthermore, when assigning reference numerals to the components of each drawing in this specification, identical or similar reference numerals are assigned to identical or similar components throughout the entire specification. In addition, terms or words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. FIG. 1 is a perspective view taken from above showing an electrode cutting device according to an embodiment of the present invention cutting an electrode. In this case, the electrode is indicated by a dotted line, and the configuration visible through the electrode is indicated by a solid line. FIG. 2 is a cross-sectional view taken along A-A of FIG. 1. FIG. 3 is a perspective view taken from above showing a cross-section taken along B-B of FIG. 1. FIG. 4 is an enlarged view of section C of FIG. 2. FIG. 5 is a cross-sectional view taken along D-D of FIG. 2. In this case, the upper and lower views are not shown. FIG. 6 is a perspective view taken from above showing a cross-section taken along F-F of FIG. 4. In this case, the first and second cross-sectional areas are indicated by hatched regions. FIGS. 1 to 6 disclose an electrode cutting device (hereinafter referred to as a cutting device) according to an embodiment of the present invention. The cutting device