KR-20260067909-A - Apparatus for Manufacturing Secondary Battery and Electrode Plate Cutting Unit for Secondary Battery Manufacturing

KR20260067909AKR 20260067909 AKR20260067909 AKR 20260067909AKR-20260067909-A

Abstract

The present invention relates to a secondary battery manufacturing apparatus and an electrode plate cutting unit for manufacturing a secondary battery. The technical problem to be solved is to provide a secondary battery manufacturing apparatus and an electrode plate cutting unit for manufacturing a secondary battery that can reduce the load burden applied to the load concentration area of the electrode plate during electrode plate cutting, thereby preventing cracks or foreign matter from occurring in the composite part and preventing the phenomenon of active material being transferred to the separator. The secondary battery manufacturing apparatus comprises: a conveying unit that moves the electrode plate to be cut along a conveying path; and a winding unit that receives the electrode plate conveyed by the conveying unit and winds it. It includes an upper plate installed on the upper part of the transfer path of a plate moving along a transfer path, a lower plate located on the lower part of the transfer path and cutting the plate through cross-movement with the upper plate, and a stripper installed on the side of the lower plate that supports the plate when the upper plate descends and transmits a reaction force corresponding to the downward force of the upper plate to the plate, but provides a stress relief space that prevents the reaction force from being transmitted only to the part of the plate where the shear force caused by the upper plate and the lower plate is applied.

Inventors

권준환
김진환
임종민
강봉근

Assignees

삼성에스디아이 주식회사

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (20)

A transfer unit that moves the electrode plate to be cut along a transfer path; A winding unit that receives and winds a electrode plate transported by a transport unit; A cutting unit comprising: an upper plate installed above the transfer path of a electrode plate moving along a transfer path; a lower plate located below the transfer path; and a stripper installed on the side of the lower plate, which supports the electrode plate when the upper plate descends and transmits a reaction force corresponding to the downward force of the upper plate to the electrode plate, while providing a stress relief space that prevents the reaction force from being transmitted to the part of the electrode plate where the shear force caused by the upper plate and the lower plate is applied. Secondary battery manufacturing device.
In paragraph 1, The above stripper has an upper surface in contact with the bottom surface of the electrode plate and a side surface facing the bottom plate, The above stress relief space is a space between the removed surface formed by removing the corner portion where the upper surface and the side surface meet, the undercoat, and the electrode plate. Secondary battery manufacturing device.
In paragraph 2, The above removal surface is a flat inclined surface, Secondary battery manufacturing device.
In paragraph 2 The above removal surface is a curved portion having a preset curvature, Secondary battery manufacturing device.
In paragraph 2, The above removal surface is a groove recessed into the inner side of the stripper, Secondary battery manufacturing device.
In paragraph 1, The stripper mentioned above is A stripper body having an upper surface in contact with the bottom surface of the electrode plate and a side surface facing the bottom plate, and a mounting groove at the part where the upper surface and the side surface meet, and It includes a fixing tip mounted in the above-mentioned mounting groove, The stress relief space is the space between the removal surface formed by removing a part of the fixing tip, the undercoat, and the electrode plate. Secondary battery manufacturing device.
In paragraph 6, The above removal surface is a flat inclined surface, Secondary battery manufacturing device.
In paragraph 6, The above removal surface is a curved portion having a preset curvature, Secondary battery manufacturing device.
In paragraph 1, The stripper mentioned above is A stripper body having a fixed bevel face facing the upper blade portion, and Includes an inclined plate mounted on a fixed inclined surface and providing a stress relief space between the base plate and the electrode plate. Secondary battery manufacturing device.
In Paragraph 9, The above inclined plate is It is a plate-shaped member, and a plurality of them are stacked and installed on a fixed bevel surface. Secondary battery manufacturing device.
A top plate installed on the upper part of the transfer path of a electrode plate moving along a transfer path; A channel located at the lower part of the above transfer path; A stripper installed on the side of the lower plate, which supports the electrode plate when the upper plate descends and transmits a reaction force corresponding to the descending force of the upper plate to the electrode plate, while providing a stress relief space that prevents the reaction force from being transmitted to the part of the electrode plate where the shear force caused by the upper plate and the lower plate is applied. Plate cutting unit.
In Paragraph 11, The above stripper has an upper surface in contact with the bottom surface of the electrode plate and a side surface facing the bottom plate, The above stress relief space is a space between the removed surface formed by removing the corner portion where the upper surface and the side surface meet, the undercoat, and the electrode plate. Plate cutting unit.
In Paragraph 12, The above removal surface is a flat inclined surface, Plate cutting unit.
In Paragraph 12, The above removal surface is a curved portion having a preset curvature, Plate cutting unit.
In Paragraph 12, The above removal surface is a groove recessed into the inner side of the stripper, Plate cutting unit.
In Paragraph 11, The stripper mentioned above is A stripper body having an upper surface in contact with the bottom surface of the electrode plate and a side surface facing the bottom plate, and a mounting groove at the part where the upper surface and the side surface meet, and It includes a fixing tip mounted in the above-mentioned mounting groove, The stress relief space is the space between the removal surface formed by removing a part of the fixing tip, the undercoat, and the electrode plate. Plate cutting unit.
In Paragraph 16, The above removal surface is a flat inclined surface, Plate cutting unit.
In Paragraph 16, The above removal surface is a curved portion having a preset curvature, Plate cutting unit.
In Paragraph 11, The stripper mentioned above is A stripper body having a fixed bevel face facing the upper blade portion, and Includes an inclined plate mounted on a fixed inclined surface and providing a stress relief space between the base plate and the electrode plate. Plate cutting unit.
In Paragraph 19, The above inclined plate is It is a plate-shaped member, and a plurality of them are stacked and installed on a fixed bevel surface. Plate cutting unit.

Description

Apparatus for Manufacturing Secondary Battery and Electrode Plate Cutting Unit for Secondary Battery Manufacturing The present invention relates to the manufacture of a secondary battery, and more specifically, to a secondary battery manufacturing apparatus and an electrode plate cutting unit for manufacturing a secondary battery. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries capable of charging and discharging. A secondary battery may largely consist of an electrode assembly comprising a positive plate, a separator, and a negative plate, a case (or can) housing the same, a substrate tab extending from the unused portion of each electrode plate of the electrode assembly, and an external terminal connected to the substrate tab. The electrode assemblies housed in the above case include stack type and jelly roll type. The jelly roll type electrode assembly is manufactured by winding continuously supplied electrode plates using a winding device. The winding device includes an electrode plate cutter. The electrode plate cutter is a device that cuts electrode plates at designed length intervals and includes an upper plate and a lower plate. However, conventional electrode plate cutting devices have a problem in that cracks occur in the composite layer of the electrode plate due to the concentration of load transmitted to the electrode plate at the moment of cutting. That is, at the moment of cutting, the top coat, bottom coat, and stripper simultaneously apply pressure to a localized area of the electrode plate, causing cracks to occur, and in severe cases, the cracked part breaks off, generating foreign matter. There is a need for technology that prevents the occurrence of cracks by dispersing the load applied to the load-concentrated area during electrode plate cutting. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in the drawings. FIG. 1 is a schematic diagram illustrating an electrode assembly of a secondary battery that can be manufactured using a secondary battery manufacturing apparatus according to one embodiment of the present invention. Figure 2 is a drawing showing the internal view of a pouch-type battery to which the electrode assembly of Figure 1 is applied. FIG. 3 is a cross-sectional view of a cylindrical battery that can be manufactured using a secondary battery manufacturing device according to one embodiment of the present invention. FIG. 4 is a perspective view showing the appearance of a prismatic battery that can be manufactured using a secondary battery manufacturing device according to one embodiment of the present invention. Figure 5 is a cross-sectional view along line AA of Figure 4. FIG. 6 is a schematic diagram illustrating the configuration of a secondary battery manufacturing apparatus according to one embodiment of the present invention. Figure 7 is an enlarged view of part K of Figure 6. FIGS. 8 to 10 are drawings showing modified examples of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIGS. 11 to 15 are drawings for explaining the configuration of a stripper applicable to an electrode plate cutting unit according to an embodiment of the present invention. FIG. 16 is a configuration diagram of a secondary battery manufacturing apparatus to which the stripper shown in FIG. 15 is applied. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and 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 present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Additionally, as used herein, “comprise, include” and/or “comprising, including” specify the presence of the mentioned