KR-20260067908-A - Apparatus for manufacturing secondary battery equipped with plate cutting device and Plate cutting device for secondary battery manufacturing

Abstract

The present invention relates to a electrode cutting machine for manufacturing a secondary battery and a secondary battery manufacturing apparatus equipped with an electrode cutting machine. The technical problem to be solved is to provide an electrode cutting machine and a secondary battery manufacturing apparatus that can prevent cracks or foreign matter from occurring in the composite part by dispersing the load applied to the electrode plate during electrode cutting, and prevent the phenomenon of active material being transferred to the separator. The electrode cutting machine comprises: an upper plate installed above the transport path of an electrode plate moving along a transport path; a lower plate located below the transport path and cutting the electrode plate through a cross-movement with the upper plate; and a stripper installed on the side of the lower plate and supporting the electrode plate upward toward the upper plate when cutting the electrode plate. The stripper comprises: a main body providing support force and a supporter supported by the main body and having a relatively lower hardness compared to the upper plate, the lower plate, and the main body.

Inventors

• 권준환
• 김진환
• 임종민
• 강봉근

Assignees

• 삼성에스디아이 주식회사

Dates

Publication Date

20260513

Application Date

20241106

Claims (20)

1. A top plate installed on the upper part of the transfer path of a electrode plate moving along a transfer path; A lower section located at the bottom of the above transfer path and cutting the electrode plate; It is equipped with a stripper installed on the side of the lower plate that supports the electrode plate upward toward the upper plate when the electrode plate is cut, and The above stripper is; A main body that provides support, and A supporter that is supported by the main body and has a relatively lower hardness compared to the upper and lower coats and the main body. Electrode cutting machine for secondary battery manufacturing.
2. In paragraph 1, The above supporter is a polymer body molded from a polymer, Electrode cutting machine for secondary battery manufacturing.
3. In paragraph 2, The above polymer body is It takes the form of a plate, forms a multi-layer structure at the top of the main body, and the uppermost polymer body contacts the bottom surface of the electrode plate when cut. Electrode cutting machine for secondary battery manufacturing.
4. In paragraph 2, On the upper surface of the above main body, a downwardly inclined surface is formed toward the lower side, and The polymer body is fixed to an inclined surface and has a shape in which the thickness increases from the opposite direction of the channel towards the channel side. Electrode cutting machine for secondary battery manufacturing.
5. In paragraph 4, The above polymer body forms a multilayer structure, and the uppermost polymer body contacts the bottom surface of the electrode plate when cut. Electrode cutting machine for secondary battery manufacturing.
6. In paragraph 2, The above polymer body is laminated and fixed to the upper part of the main body, and the upper part of the polymer body is further provided with a cover plate that receives pressure transmitted from the upper plate during cutting and transmits it to the polymer body. Electrode cutting machine for secondary battery manufacturing.
7. In paragraph 2, A side groove is formed on the side facing the lower surface of the main body, which is open to the top and the side, and A support block is mounted in the side groove, and The polymer body contacts the main body and the support block simultaneously, and transmits the pressure delivered from the upper blade to the lower part during electrode plate cutting. Electrode cutting machine for secondary battery manufacturing.
8. In paragraph 2, A side groove is formed on the side facing the lower surface of the main body, which is open to the top and the side, and The above polymer body is mounted in a side groove and receives pressure transmitted from the upper plate during electrode plate cutting. Electrode cutting machine for secondary battery manufacturing.
9. In paragraph 2, A side groove is formed on the side facing the lower surface of the above-mentioned main body, which is open to the top and the side, and The above polymer body takes the form of a plate and is fixed to the upper part of the main body, with a part floating above the side groove. Electrode cutting machine for secondary battery manufacturing.
10. In paragraph 2, A mounting groove is formed on the side facing the lower surface of the above-mentioned main body, and The above polymer body is coupled and supported in a mounting groove on the side of the main body, and receives the pressure transmitted from the upper plate during electrode plate cutting. Electrode cutting machine for secondary battery manufacturing.
11. 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 electrode cutting machine comprising: an upper plate installed above the electrode plate transport path; a lower plate located below the electrode plate transport path and cutting the electrode plate; a main body installed on the side of the lower plate and providing support force by supporting the electrode plate upward toward the upper plate when cutting the electrode plate; and a supporter supported by the main body and having a relatively lower hardness compared to the upper plate, the lower plate, and the main body. Secondary battery manufacturing device.
12. In Paragraph 11, The above supporter is a polymer body molded from a polymer, Secondary battery manufacturing device.
13. In Paragraph 12, The above polymer body is It takes the form of a plate, forms a multi-layer structure at the top of the main body, and the uppermost polymer body contacts the bottom surface of the electrode plate when cut. Secondary battery manufacturing device.
14. In Paragraph 12, On the upper surface of the above main body, a downwardly inclined surface is formed toward the lower side, and The polymer body is fixed to an inclined surface and has a shape in which the thickness increases from the opposite direction of the channel towards the channel side. Secondary battery manufacturing device.
15. In Paragraph 14, The above polymer body forms a multilayer structure, and the uppermost polymer body contacts the bottom surface of the electrode plate when cut. Secondary battery manufacturing device.
16. In Paragraph 12, The above polymer body is laminated and fixed to the upper part of the main body, and the upper part of the polymer body is further provided with a cover plate that receives pressure transmitted from the upper plate during cutting and transmits it to the polymer body. Secondary battery manufacturing device.
17. In Paragraph 12, A side groove is formed on the side facing the lower surface of the main body, which is open to the top and the side, and A support block is mounted in the side groove, and The polymer body contacts the main body and the support block simultaneously, and transmits the pressure delivered from the upper blade to the lower part during electrode plate cutting. Secondary battery manufacturing device.
18. In Paragraph 12, A side groove is formed on the side facing the lower surface of the main body, which is open to the top and the side, and The above polymer body is mounted in a side groove and receives pressure transmitted from the upper plate during electrode plate cutting. Secondary battery manufacturing device.
19. In Paragraph 12, A side groove is formed on the side facing the lower surface of the above-mentioned main body, which is open to the top and the side, and The above polymer body takes the form of a plate and is fixed to the upper part of the main body, with a part floating above the side groove. Secondary battery manufacturing device.
20. In Paragraph 12, A mounting groove is formed on the side facing the lower surface of the above-mentioned main body, and The above polymer body is coupled and supported in a mounting groove on the side of the main body, and receives the pressure transmitted from the upper plate during electrode plate cutting. Secondary battery manufacturing device.

Description

Plate cutting device for manufacturing secondary batteries and apparatus for manufacturing secondary batteries equipped with a plate cutting device The present invention relates to the cutting of electrode plates of a secondary battery, and more specifically, to an electrode plate cutting machine for manufacturing a secondary battery and a secondary battery manufacturing apparatus equipped with an electrode plate cutting machine. 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 above-mentioned winding device includes a plate cutter. The plate cutter is a device that cuts the plate at designed length intervals and includes an upper plate and a lower plate. However, conventional plate cutting devices have a problem in that cracks occur in the composite layer of the plate due to the concentration of load transmitted to the plate at the moment of cutting. That is, at the moment of cutting, the upper plate, the lower plate, and the stripper simultaneously apply pressure to a localized area of the plate, causing cracks to occur, and in severe cases, the cracked part breaks off, generating foreign matter. A stripper structure is required that prevents the occurrence of cracks by dispersing the load applied to the composite surface during 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 diagram illustrating the basic configuration of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 7 is a configuration diagram illustrating a modified example of the secondary battery manufacturing device shown in FIG. 6. FIG. 8 is a drawing illustrating another example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 9 is a drawing illustrating a modified example of the secondary battery manufacturing apparatus of FIG. 8. FIG. 10 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 11 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 12 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 13 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 14 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 15 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 16 is a drawing illustrating another modified example of a secondary battery manufacturing apparatus according to one embodiment of the present invention. FIG. 1