CN-122025510-A - Apparatus for manufacturing secondary battery electrode

Abstract

An apparatus for manufacturing an electrode of a secondary battery includes a feeder configured to feed a substrate, an electrode mold configured to coat the substrate with an electrode paste, an insulating mold configured to coat the substrate having passed through the electrode mold with an insulating paste, and a uniform flow rate portion on the insulating mold and configured to guide the insulating paste to be discharged such that a flow rate of the discharged insulating paste is maintained within a set range.

Inventors

• JIN JICHENG
• Xu Yuanxie
• LI SHENGXUE
• Zheng Laizhun
• JIN SHAOXUN
• LI CHENGJUAN

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260512

Application Date

20250807

Priority Date

20241112

Claims (20)

1. 1. An apparatus for manufacturing an electrode of a secondary battery, the apparatus comprising: a feeder configured to feed a substrate; An electrode mold configured to coat the substrate with an electrode paste; an insulating mold configured to coat the substrate having passed through the electrode mold with an insulating paste, and A uniform flow rate portion on the insulating mold and configured to guide the insulating paste to be discharged such that a flow rate of the insulating paste to be discharged is maintained within a set range.
2. 2. The apparatus of claim 1, wherein the feeder comprises: A unwind roller about which the substrate is configured to be wound, and which is configured to supply the substrate; a coating roller facing the electrode mold and the insulating mold and configured to allow the substrate to pass through the coating roller, and A moving roller configured to move the substrate having passed through the coating roller.
3. 3. The apparatus of claim 1, wherein the electrode mold is configured to apply the electrode paste such that a single column of electrode portions is formed on the substrate, and The insulating mold is disposed above the substrate and is configured to apply the insulating paste such that an insulating portion is formed on an opposite side of the electrode paste.
4. 4. The apparatus of claim 1, wherein the electrode mold is configured to apply the electrode paste such that a plurality of columns of electrode portions are formed spaced apart from one another on the substrate, and The insulating mold is disposed above the substrate and is configured to apply the insulating paste such that an insulating portion is formed on an opposite side of the electrode paste.
5. 5. The apparatus of claim 1, wherein the insulating mold comprises: a mold support; an upper mold mounted on the mold support and configured to supply the insulating paste, and A lower die coupled to the upper die, and The uniform flow rate portion is disposed between the upper die and the lower die, and is configured to guide the insulating paste to be discharged.
6. 6. The apparatus of claim 5, wherein the upper mold comprises: A first upper die coupled to the die support and configured to supply the insulating paste to a first side of the electrode paste, and A second upper die is coupled to the die support and configured to supply the insulating paste to a second side of the electrode paste.
7. 7. The apparatus of claim 6, wherein the lower mold comprises: a first lower mold coupled to the first upper mold, and A second lower die coupled to the second upper die.
8. 8. The apparatus of claim 7, wherein the uniform flow rate section comprises: a first uniform flow rate portion between the first upper die and the first lower die, and A second uniform flow rate section between the second upper die and the second lower die.
9. 9. The apparatus of claim 8, wherein the first upper mold and the second upper mold are symmetrical to each other, The first lower mold and the second lower mold are symmetrical to each other, and The first uniform flow rate portion and the second uniform flow rate portion are symmetrical to each other.
10. 10. The apparatus of claim 5, wherein the uniform flow rate section comprises: an inlet portion configured to guide the insulating paste supplied from the upper die, and An outlet portion connected to the inlet portion and configured to guide the insulating paste passing through the inlet portion in an oblique direction and uniformize the flow rate of the discharged insulating paste.
11. 11. The apparatus of claim 10, wherein the inlet portion comprises: a first inlet portion; A second inlet portion extending from a first side of the first inlet portion, and A third inlet portion extending from the second side of the first inlet portion, an An inflow flow path is defined in a space between the second inlet portion and the third inlet portion.
12. 12. The apparatus of claim 11, wherein the outlet portion comprises: A second outlet portion extending from the second inlet portion, and A third outlet portion extending from the third inlet portion, an An outflow flow path communicating with the inflow flow path is defined in a space between the second outlet portion and the third outlet portion in the oblique direction.
13. 13. The apparatus of claim 12, wherein the second outlet portion comprises: a second outflow inclined part extending from the second inlet in the oblique direction, and And a second outflow extending portion extending from the second outflow inclined portion.
14. 14. The apparatus of claim 13, wherein the third outlet portion comprises: a third outflow inclined part extending from the third inlet in the oblique direction and facing the second outflow inclined part, and A third outflow extension portion extending from the third outflow inclined portion and facing the second outflow extension portion.
15. 15. The device of claim 14, wherein a length of the second outflow inclined section is greater than or equal to a length of the third outflow inclined section.
16. 16. The apparatus of claim 14, wherein an entry point of the second outflow inclined section is higher than an entry point of the third outflow inclined section.
17. 17. The device of claim 15, wherein the second outflow extension has a tapered shape.
18. 18. The apparatus of claim 13, wherein the width of the inflow flow path is greater than the width of the outflow flow path.
19. 19. The device of claim 5 or 11, wherein a plurality of uniform flow rate sections are engaged.
20. 20. The apparatus of claim 19, wherein uniform flow rate portions of the plurality of uniform flow rate portions have different shapes.

Description

Apparatus for manufacturing secondary battery electrode Technical Field Aspects of embodiments of the present disclosure relate to an apparatus for manufacturing a secondary battery electrode, for example, an apparatus for manufacturing a secondary battery electrode using a slit mold. Background The demand for portable electronic products (e.g., notebook computers, video cameras, and cellular phones) 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 high 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 portable small-sized electronic devices such as mobile phones, notebook computers, and video cameras. A secondary battery of a large capacity and a high density may be used for motor driving power of hybrid vehicles and electric vehicles, or for energy storage. The secondary battery includes an electrode assembly for current charging and discharging, a case for accommodating the electrode assembly and an electrolyte, a cap plate coupled to an opening of the case, and an electrode terminal through which current flowing from the electrode assembly to the outside of the cap plate passes. In the electrode assembly, the electrodes may be disposed on both sides or on opposite sides of the separator as an electrically insulating substance, 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, and at the same time, charge and discharge the electrode assembly. The electrode may be formed by coating the substrate with an active material slurry. The slit die may be used to manufacture an electrode by coating a substrate with an active material slurry. The slit mold includes a lower mold and an upper mold forming a material chamber for supplying active material slurry and setting a height of a slit for discharging the active material slurry, and includes a core member installed between the lower mold and the upper mold to set a width of the slit. The above information disclosed in this background section is provided to enhance an understanding of the background of the disclosure and, therefore, it may contain information that does not constitute a related (or prior) art. Disclosure of Invention According to an aspect of embodiments of the present disclosure, there is provided an apparatus for manufacturing a secondary battery electrode, a slit mold of which may satisfy a hybrid coating quality, may be used for a design having a narrow uncoated region, and may satisfy a coating quality of an insulating layer. According to another aspect of the embodiments of the present disclosure, an apparatus for manufacturing a secondary battery electrode can improve coating quality by ensuring uniformity of flow rate of slurry. The above and other aspects and features of the present disclosure will be described or will be apparent in the following description of some embodiments of the present disclosure. According to one or more embodiments of the present disclosure, an apparatus for manufacturing an electrode for a secondary battery includes a feeder configured to feed a substrate (e.g., foil), an electrode mold configured to coat the substrate with an electrode paste, an insulating mold configured to coat the substrate having passed through the electrode mold with an insulating paste, and a uniform flow rate part on the insulating mold configured to guide the insulating paste to be discharged such that a flow rate of the discharged insulating paste is maintained within a set range. The supply part may include an unwinding roller around which the substrate is wound and configured to supply the substrate, a coating roller facing the electrode mold and the insulating mold and configured to allow the substrate to pass through the coating roller, and a moving roller configured to move the substrate having passed through the coating roller. The electrode mold may be coated with an electrode paste such that a single column of electrode parts is formed on the foil/substrate, and the insulating mold may be disposed over the substrate and configured to be coated with an insulating paste such that the insulating parts are formed on both sides or opposite sides of the electrode paste. The electrode mold may be coated with an electrode paste such that a plurality of columns of electrode parts are formed on the foil/substrate to be spaced apart from each other, and the insulating mold may