KR-20260067907-A - Cutting Unit for Electrode Plate of Secondary Battery, Secondary Battery Manufacturing Apparatus Equipped with the Cutting Unit, and Method of Manufacturing Secondary Battery

KR20260067907AKR 20260067907 AKR20260067907 AKR 20260067907AKR-20260067907-A

Abstract

The present invention relates to an electrode plate cutting unit for a secondary battery, and a secondary battery manufacturing apparatus and manufacturing method equipped with the same. The problem to be solved is to prevent the detachment of active material by suppressing the movement of the electrode plate during cutting, to eliminate the post-processing step for collecting foreign matter after cutting, and to prevent damage or deformation of the shear surface through uniform surface contact between the cutter and the tilting stripper. The electrode plate cutting unit for a secondary battery and the electrode plate cutting unit are installed below the transport path of an electrode plate moving along a transport path and have a lower cutting section having a lower blade having an inclined blade and a support stripper located on the side of the lower blade that supports the electrode plate upward; and an upper cutting section having an upper blade provided to be vertically movable above the transport path and cutting the electrode plate through cross-movement with the lower blade when descending, and a tilting stripper installed on the side of the upper blade that supports the electrode plate toward the lower blade and tilts.

Inventors

권준환
김진환
임종민
강봉근

Assignees

삼성에스디아이 주식회사

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (20)

A lower cutting section having a lower section installed at the lower part of the transfer path of an electrode plate moving along a transfer path and having an inclined blade, and a support stripper located on the side of the lower section and supporting the electrode plate upward; A secondary battery electrode plate cutting unit comprising an upper cutting section having an upper section configured to be vertically movable on the upper part of the above-mentioned transport path and cutting the electrode plate through cross-movement with the lower section when descending, and a tilting stripper installed on the side of the upper section and supporting the electrode plate toward the lower section and tilting.
In paragraph 1, on the upper surface of the above-mentioned underlay A cutting unit for a secondary battery electrode plate, which is inclined downward in the width direction of the electrode plate and has an inclined surface formed at one corner having the blade portion.
In paragraph 2, the upper cutting part An elevator structure that moves up and down by receiving external power, and A support body fixed to the elevator structure, and A secondary battery electrode plate cutting unit comprising a stripper supporter that supports the tilting stripper on a support body, maintains the tilting stripper in a horizontal state when the support body is raised, and causes the tilting stripper to tilt at an angle equal to the inclination angle of the support body by receiving a reaction force from the support body when the support body is lowered.
In paragraph 3, The above-mentioned tilting stripper is provided with a balancing head portion that extends upward and has a vertical slot, and A stripper supporter is a secondary battery electrode plate cutting unit having a rotating shaft member that is coupled to a support body while passing through a vertical slot of a balancing head.
In paragraph 4, the above-mentioned rotating shaft member is A cutting unit for a secondary battery electrode plate, comprising a screw that passes through a vertical slot and screw-couples to a support body.
In paragraph 4, the above support body A secondary battery electrode plate cutting unit further comprising a horizontal maintaining member that maintains the tilting stripper horizontally while the support body is in a raised state.
In paragraph 6, A locking portion is formed at both ends of the above-mentioned tilting stripper, and A secondary battery electrode plate cutting unit having a support bracket that is fixed to a support body, is located on the opposite side with a tilting stripper in between, and supports the locking part upward.
In Clause 7, on the support bracket A secondary battery electrode plate cutting unit equipped with a support member that enters the lower part of the locking part of a tilting stripper and supports the locking part.
A secondary battery electrode plate cutting unit according to paragraph 2, wherein the angle of inclination of the inclined surface is 0.5 degrees or less with respect to a plane including the electrode plate.
In paragraph 2, the above-mentioned underside A secondary battery electrode plate cutting unit having a transfer guide formed to prevent the electrode plate from meandering.
An electrode plate transport unit that transports an electrode plate along a transport path; A winding unit that winds an electrode plate transported by an electrode plate transport unit; A cutting unit comprising: a lower cutting section installed at the bottom of the above-mentioned transfer path and having a lower blade with an inclined edge, a support stripper located on the side of the lower blade and supporting an electrode plate upward; an upper cutting section provided to be vertically movable at the top of the transfer path and cutting an electrode plate through cross-movement with the lower blade when descending, and a tilting stripper installed on the side of the upper cutting section and supporting the electrode plate toward the lower blade and tilting; and A secondary battery manufacturing device comprising a lifting drive unit for raising and lowering the upper cutting part.
In Clause 11, on the upper surface of the above-mentioned underlay A secondary battery manufacturing device having a downwardly inclined surface in the width direction of the electrode plate and having the above-mentioned blade formed on one corner.
In Clause 12, the upper cutting part An elevator structure that moves up and down by receiving external power, and A support body fixed to the elevator structure, and A secondary battery manufacturing apparatus comprising a stripper supporter that supports the tilting stripper on a support body, maintains the tilting stripper in a horizontal state when the support body is raised, and causes the tilting stripper to tilt at an angle equal to the inclination angle of the support body by receiving a reaction force from the support body when the support body is lowered.
In Paragraph 13, The above-mentioned tilting stripper is provided with a balancing head portion that extends upward and has a vertical slot, and A secondary battery manufacturing device having a stripper supporter that has a rotating shaft member coupled to a support body while passing through a vertical slot of a balancing head.
In Clause 14, the above-mentioned rotating shaft member is A secondary battery manufacturing device comprising a screw that passes through a vertical slot and screw-couples to a support body.
In Clause 14, the above support body is A secondary battery manufacturing device further comprising a horizontal maintaining member that maintains the tilting stripper horizontally while the support body is in a raised state.
In Paragraph 16, A locking portion is formed at both ends of the above-mentioned tilting stripper, and A secondary battery manufacturing device having a support bracket that supports the locking part upwardly, wherein the horizontal leveling part is fixed to the support body but is located on the opposite side with the tilting stripper in between.
A secondary battery manufacturing device according to claim 17, wherein the support bracket is provided with a support portion that enters the lower part of the catch portion of the tilting stripper and supports the catch portion.
A secondary battery manufacturing apparatus according to claim 12, wherein the angle of inclination of the inclined surface is 0.5 degrees or less with respect to a plane including an electrode plate.
A transfer step for transferring the electrode plate to be cut along a transfer path; A cutting step of cutting an electrode plate using a cutting unit comprising: a lower blade installed at the lower part of the transfer path of an electrode plate moving along a transfer path and having an inclined blade; a support stripper located on the side of the lower blade and supporting the electrode plate upward; an upper blade provided to be vertically movable at the upper part of the transfer path and cutting the electrode plate through cross-movement with the lower blade when descending; and a tilting stripper installed on the side of the upper blade and supporting the electrode plate toward the lower blade and tilting, wherein the cutting is performed while the tilting stripper is tilted to be in close contact with the electrode plate; and A method for manufacturing a secondary battery, comprising a winding step for winding a cut electrode plate.

Description

Cutting Unit for Electrode Plate of Secondary Battery, Secondary Battery Manufacturing Apparatus Equipped with the Cutting Unit, and Method of Manufacturing Secondary Battery The present invention relates to a cutting unit for cutting an electrode plate during the manufacturing process of a secondary battery, a secondary battery manufacturing apparatus equipped with the same, and a secondary battery manufacturing method. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries that can be charged and discharged. Generally, secondary batteries include an electrode assembly consisting of positive and negative electrode plates (hereinafter referred to as electrode plates) and a separator. The electrode plates can be manufactured through coating, rolling, slitting, and notching processes. A plate cutter may be used in the manufacturing process of electrode plates. The plate cutter includes an upper plate and a lower plate, respectively, installed at the top and bottom of the electrode plate being transported along a transport path. The upper and lower plates cut the electrode plate located between them through cross-movement. However, conventional electrode cutting machines have a problem in that the electrode moves when cutting the electrode. The reason for the electrode movement is that there is no separate support mechanism to support the electrode during cutting. In addition, the electrode movement phenomenon causes the active material to detach from the electrode substrate during cutting. Accordingly, conventional electrode cutting machines require additional suction devices or foreign matter collection processes to remove foreign substances. 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 some embodiments 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 produced through a secondary battery manufacturing device according to some embodiment of the present invention. FIG. 4 is a perspective view showing the appearance of a prismatic battery produced through a secondary battery manufacturing device according to some embodiment of the present invention. Figure 5 is a cross-sectional view along line AA of Figure 4. FIG. 6 is a drawing for explaining the configuration and operation method of a secondary battery manufacturing device according to some embodiments of the present invention. FIGS. 7 and 8 are drawings for explaining the configuration and operation of an electrode plate cutting unit according to some embodiments of the present invention. FIGS. 9 and FIGS. 10 are drawings illustrating modified examples of an electrode plate cutting unit according to some embodiments of the present invention. FIG. 11 is a partial perspective view illustrating a tilting stripper mounting structure in an electric electrode plate cutting unit according to some embodiment of the present invention. Fig. 12 is a drawing that separately illustrates the river diagram shown in Fig. 7. Fig. 13 is a perspective view illustrating the river diagram of Fig. 9. FIGS. 14 to 16 are drawings for explaining modified examples of a tilting stripper and a support bracket applicable to a cutting unit according to some embodiments of the present invention. FIG. 17 is a partially cutaway drawing showing the end portion of the support bracket of FIG. 16. FIG. 18 is a flowchart illustrating a method for manufacturing a secondary battery according to some embodiments of the present invention. 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