CN-122006961-A - Slit die for manufacturing secondary battery electrode

Abstract

A slit mold for manufacturing a secondary battery electrode includes an upper mold, a lower mold below the upper mold, a gasket between the upper mold and the lower mold, and a supply part coupled to the lower mold and configured to supply slurry to a space defined in the gasket. In the slit die for manufacturing the secondary battery electrode according to the present invention, the gasket can be disposed between the upper die and the lower die, and the slurry supplied from the lower die can be discharged through the gasket. Accordingly, the slurry stored in the passage formed in the lower die can be prevented from leaking due to the weight thereof.

Inventors

• LI SHENGXUE
• Zheng Laizhun
• LI CHENGJUAN
• Xu Yuanxie
• Biao Yongxue

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260512

Application Date

20251111

Priority Date

20241112

Claims (20)

1. 1. A slit mold for manufacturing an electrode of a secondary battery, the slit mold comprising: An upper die; A lower die below the upper die; A backing plate between the upper die and the lower die, and A supply coupled to the lower mold and configured to supply slurry to a space defined in the pad.
2. 2. The slit die of claim 1, wherein the lower die comprises: A lower coupling portion on which the pad is disposed and which is coupled to the upper mold, and A lower support portion extending downward from the lower coupling portion and having a smaller width than the lower coupling portion, and The supply portion coupled to the lower coupling portion is disposed on each of both sides of the lower support portion.
3. 3. The slot die of claim 2, wherein the lower coupling portion comprises: A lower coupling body to which the supply part is coupled, and A lower coupling passage passing through the lower coupling body.
4. 4. The slot die of claim 1 wherein the shim plate comprises: A setting plate set on the lower mold and A discharge passage in the settling plate and communicating with the supply part to discharge the slurry.
5. 5. The slot die of claim 4, wherein the vent channel comprises: a first discharge passage in the setting plate and communicating with a passage formed in the lower die, and And a second discharge passage having a length in the first direction in the settling plate and communicating with the first discharge passage.
6. 6. The slit die of claim 2, wherein the supply comprises: a supply coupling portion coupled to the lower coupling portion; a supply extension extending from the supply coupling in the shape of an elbow, and A supply line portion connected to the supply extension and configured to supply the slurry.
7. 7. The slit die of claim 6, wherein the supply line portion comprises: a line storage section configured to store the slurry; a line hose portion connected to the line storage portion and configured to guide the slurry, and A line connection portion in the line hose portion and coupled to the supply extension.
8. 8. The slot die of claim 7 wherein the line hose portion comprises a deformable material.
9. 9. The slot die of claim 6, wherein the supply further comprises a supply seal disposed in the supply coupling and in contact with the lower coupling.
10. 10. The slit die of claim 9, wherein the supply seal is an O-ring.
11. 11. The slit die of claim 1, wherein the lower die comprises: a lower body on which the pad is disposed, and which is coupled to the upper mold; a lower passage in the lower body to guide the slurry, and A lower supply portion mounted on the lower body and configured to supply the slurry to the lower passage.
12. 12. The slot die of claim 11, wherein the lower channel comprises: A first passage formed in the lower body by hole machining in a first direction, and A second channel communicating with the first channel, perforated in a second direction intersecting the first direction, and configured to direct the slurry to the backing plate.
13. 13. The slot die of claim 12, wherein the first channel is exposed through a rear surface of the lower body, and The lower supply part is assembled with the rear surface of the lower body.
14. 14. The slot die of claim 12 wherein the shim plate comprises: A setting plate set on the lower mold and A discharge channel in the setter plate, in communication with the second channel, and configured to discharge the slurry.
15. 15. The slot die of claim 14, wherein the vent channel comprises: a first discharge channel in the setter plate and communicating with the second channel, and And a second discharge passage having a length in the first direction in the settling plate and communicating with the first discharge passage.
16. 16. The slot die of claim 11, wherein the lower channel comprises a third channel formed by hole machining the lower body in a second direction and configured to direct the slurry to the shim plate.
17. 17. The slot die of claim 16, wherein the third channel is exposed through a bottom surface of the lower body, and The lower supply part is assembled with the bottom surface of the lower body.
18. 18. The slot die of claim 16 wherein the shim plate comprises: A setting plate set on the lower mold and A discharge channel in the setter plate, in communication with the third channel, and configured to discharge the slurry.
19. 19. The slot die of claim 18, wherein the vent channel comprises: a first discharge passage in the setter plate and communicating with the third passage, and And a second discharge passage having a length in the first direction in the settling plate and communicating with the first discharge passage.
20. 20. The slot die of claim 11, wherein the lower channel comprises: A first passage machined in the lower body in a first direction; A second passage communicating with the first passage, perforated in a second direction intersecting the first direction, and configured to guide the slurry to the mat, and And a third passage communicating with the second passage and machined from a bottom surface hole of the lower body in the second direction.

Description

Slit die for manufacturing secondary battery electrode Technical Field Aspects of embodiments of the present disclosure relate to a slit mold for manufacturing a secondary battery electrode. Background The demand for portable electronic products such as laptop computers, video cameras, and portable telephones is rapidly increasing, and robots, electric vehicles, and the like are commercialized. Therefore, research into a high-performance secondary battery capable of repeated charge and discharge is actively being conducted. In particular, lithium secondary batteries have high energy density and low operating voltage, have excellent storage and life characteristics, and thus are widely used as energy sources for various electronic products. Unlike a primary battery, a secondary battery is a battery that repeatedly charges and discharges. A small-capacity secondary battery is used for small-sized portable electronic devices such as mobile phones, laptop computers, and video cameras. High-capacity and high-density secondary batteries may be used for motor driving power sources or energy storage of hybrid vehicles and electric vehicles. The secondary battery includes an electrode assembly for charging and discharging current, a case for accommodating the electrode assembly and an electrolyte, a cap plate coupled to an opening of the case, and an electrode terminal connected to the electrode assembly and protruding outward from the cap plate. In the electrode assembly, the electrodes may be disposed on both sides or opposite sides of a separator, which is an electrically insulating material, and a structure in which the separator and the electrodes are wound, stacked, or mixed may be formed. The separator can continuously maintain ion conductivity while isolating electrodes having different polarities in the electrode assembly, thereby charging and discharging the electrode assembly. The electrode is formed by coating the substrate with an active material slurry. The slit die is used to manufacture an electrode by coating a substrate with an active material slurry. The slit mold forms a cavity for supplying active material slurry, and includes lower and upper blocks setting a height of a slit for discharging the active material slurry, and a gasket member installed between the lower and upper blocks to set a width of the slit. The above information disclosed in the art forming the background of the present disclosure is provided to enhance understanding of the background of the present disclosure and thus may include information that does not constitute a related art. Disclosure of Invention According to an aspect of one or more embodiments of the present disclosure, there is provided a slit mold for manufacturing a secondary battery electrode, which is capable of satisfying the coating quality of a slurry (or a mixture) and also capable of achieving coating with an insulating layer. According to another aspect of one or more embodiments of the present disclosure, there is provided a slit mold for manufacturing a secondary battery electrode, which is capable of preventing or substantially preventing leakage of slurry by its weight. The above and other aspects and features of the present disclosure will be described or become apparent from the following description of some embodiments of the present disclosure. According to one or more embodiments, a slit mold for manufacturing a secondary battery electrode includes an upper mold, a lower mold below the upper mold, a gasket between the upper mold and the lower mold, and a supply part coupled to the lower mold and configured to supply slurry to a space defined in the gasket. The lower mold may include a lower coupling portion on which the pad is disposed and coupled to the upper mold, and a lower support portion extending downward from the lower coupling portion and having a smaller width than the lower coupling portion, and a supply portion coupled to the lower coupling portion may be disposed on each of both sides of the lower support portion. The lower coupling part may include a lower coupling body to which the supply part is coupled, and a lower coupling passage passing through the lower coupling body. The pad may include a seating plate seated on the lower mold, and a discharge passage in the seating plate and communicating with the supply part to discharge the slurry. The discharge channel may include a first discharge channel in the set plate and communicating with the channel formed in the lower mold, and a second discharge channel having a length in the first direction in the set plate and communicating with the first discharge channel. The supply part may include a supply coupling part coupled to the lower coupling part, a supply extension part extending in a bent shape from the supply coupling part, and a supply line part connected to the supply extension part and configured to supply the slurry. The supply line part may include a line storage part con