KR-20260067910-A - Apparatus for Manufacturing Secondary Battery and Electrode Plate Cutting Unit for Secondary Battery

KR20260067910AKR 20260067910 AKR20260067910 AKR 20260067910AKR-20260067910-A

Abstract

The present invention relates to a secondary battery manufacturing apparatus and a secondary battery electrode plate cutting unit. The technical problem to be solved is to provide a secondary battery manufacturing apparatus and a secondary battery electrode plate cutting unit that utilize a high-strength spring to compress and fix the base plate, thereby ensuring good fixing force of the base plate and maintaining stable cutting precision, preventing active material detachment during electrode plate cutting, and improving the quality of the cutting surface. The secondary battery manufacturing apparatus comprises: a conveying unit that moves the electrode plate to be cut along a conveying path; a winding unit that receives and winds the electrode plate cut and conveyed by the conveying unit; and a cutting unit having an upper plate installed to be vertically movable on the upper part of the conveying path, a fixed body fixed to the lower part of the conveying path and providing support force, a base plate supported by the fixed body and cutting the electrode plate through cross-movement with the upper plate, and an elastic support unit that elastically supports the base plate toward the fixed body to maintain the fixed state of the base plate relative to the fixed body.

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 cut electrode plate transported by a transport unit; A cutting unit comprising: an upper plate installed to be vertically movable on the upper part of the above transfer path; a fixed body fixed to the lower part of the transfer path and providing support; a lower plate supported by the fixed body and cutting a plate through cross-movement with the upper plate; and an elastic support member that elastically supports the lower plate toward the fixed body to maintain the fixed state of the lower plate relative to the fixed body. Secondary battery manufacturing device.
In paragraph 1, The above elastic support member is; A horizontal extension shaft, the end of which penetrates the lower section and is connected to a fixed body and is horizontally extended, and A pressure spring wrapping the horizontal extension shaft, and A spring supporter having a pressure spring that presses the pressure spring toward the lower side, causing the pressure spring to press the lower side toward the fixed body. Secondary battery manufacturing device.
In paragraph 2, The above horizontal extension shaft has a threaded section formed thereon, and The above spring support A spring cover that passes a horizontal extension shaft, and A pressure adjustment nut that is coupled to the above-mentioned screw portion and advances the spring cover in the direction of the pressure spring. Secondary battery manufacturing device.
In paragraph 1, Between the fixed body and the underside A positioning guide part formed to guide the mounting position of the lower section relative to the fixed body, Secondary battery manufacturing device.
In paragraph 4, The above positioning guide part A positioning groove formed on the opposite surface of the lower body or fixed body, and Includes an insertion part formed in a fixed body or base and fitted into a positioning groove. Secondary battery manufacturing device.
In paragraph 3, The above fixed body A plurality of guide grooves are formed parallel to the horizontal extension shaft and open toward the spring cover, and The spring cover is equipped with a balancing arm that is horizontally extended while fixed to the spring cover and is slidably inserted into the guide groove to prevent tilting of the spring cover. Secondary battery manufacturing device.
In paragraph 1, The above elastic support A fixed bracket facing the underside while supported by a fixed body, and A pressure spring that is inserted in a compressed state between the fixed bracket and the base plate, and elastically presses the base plate toward the fixed body while supported by the fixed bracket. Secondary battery manufacturing device.
In Paragraph 7, A spacer for adjusting the spacing of the fixing bracket relative to the fixing body is further provided between the above-mentioned fixing body and the fixing bracket. Secondary battery manufacturing device.
In Paragraph 7, The above fixed bracket A spring pusher further installed to press the pressure spring toward the lower side, Secondary battery manufacturing device.
In Paragraph 9, The above-mentioned fixing bracket has a female screw hole formed therein, and The spring pusher is A screw shaft that screws into a female screw hole, and A pushing disc provided at one end of a screw shaft and transmitting a pressing force to a pressing spring, and A torque input unit that applies axial rotational force to a screw shaft Secondary battery manufacturing device.
A top plate installed on the upper part of a plate moving along a transport path; A fixed body that is fixed to the lower part of the above-mentioned transfer path and provides support; A lower plate that is supported by a fixed body and cuts the electrode plate through cross-movement with the upper plate; A structure having an elastic support member that elastically supports the substrate toward the fixed body to maintain the fixed state of the substrate relative to the fixed body. Secondary battery electrode plate cutting unit.
In Paragraph 11, The above elastic support member is; A horizontal extension shaft, the end of which penetrates the lower section and is connected to a fixed body and is horizontally extended, and A pressure spring wrapping the horizontal extension shaft, and A spring supporter having a pressure spring that presses the pressure spring toward the lower side, causing the pressure spring to press the lower side toward the fixed body. Secondary battery electrode plate cutting unit.
In Paragraph 12, The above horizontal extension shaft has a threaded section formed thereon, and The above spring support A spring cover that passes a horizontal extension shaft, and A pressure adjustment nut that is coupled to the above-mentioned screw portion and advances the spring cover in the direction of the pressure spring. Secondary battery electrode plate cutting unit.
In Paragraph 11, Between the fixed body and the underside A positioning guide part formed to guide the mounting position of the lower section relative to the fixed body, Secondary battery electrode plate cutting unit.
In Paragraph 14, The above positioning guide part A positioning groove formed on the opposite surface of the lower body or fixed body, and Includes an insertion part formed in a fixed body or base and fitted into a positioning groove. Secondary battery electrode plate cutting unit.
In Paragraph 13, The above fixed body A plurality of guide grooves are formed parallel to the horizontal extension shaft and open toward the spring cover, and The spring cover is equipped with a balancing arm that is horizontally extended while fixed to the spring cover and is slidably inserted into the guide groove to prevent tilting of the spring cover. Secondary battery electrode plate cutting unit.
In Paragraph 11, The above elastic support A fixed bracket facing the underside while supported by a fixed body, and A pressure spring that is inserted in a compressed state between the fixed bracket and the base plate, and elastically presses the base plate toward the fixed body while supported by the fixed bracket. Secondary battery electrode plate cutting unit.
In Paragraph 17, A spacer for adjusting the spacing of the fixing bracket relative to the fixing body is further provided between the above-mentioned fixing body and the fixing bracket. Secondary battery electrode plate cutting unit.
In Paragraph 17, The above fixed bracket A spring pusher further installed to press the pressure spring toward the lower side, Secondary battery electrode plate cutting unit.
In Paragraph 19, The above-mentioned fixing bracket has a female screw hole formed therein, and The spring pusher is A screw shaft that screws into a female screw hole, and A pushing disc provided at one end of a screw shaft and transmitting a pressing force to a pressing spring, and A torque input unit that applies axial rotational force to a screw shaft Secondary battery electrode plate cutting unit.

Description

Apparatus for Manufacturing Secondary Battery and Electrode Plate Cutting Unit for Secondary Battery The present invention relates to the manufacture of a secondary battery, and more specifically, to a secondary battery manufacturing apparatus and a secondary battery electrode plate cutting unit. 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 plates at designed length intervals and includes an upper blade and a lower blade. The upper blade is installed above the plate transport path, and the lower blade is installed below the transport path, and they cut the plates through cross-movement relative to each other. The aforementioned base plate is manually secured using bolts. For instance, the base plate is pressed against a fixed structure and bolted in place. However, base plates secured by bolts have the disadvantage of weak fastening force and the bolts loosening slightly due to vibrations during operation. Additionally, since it is secured manually, the setting is bound to vary depending on the operator. 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 side view showing the upper section lowered in the cutting unit illustrated in Fig. 6. Figure 8 is a cross-sectional view illustrating the internal structure of the cutting unit of Figure 7. FIG. 9 is an exploded perspective view illustrating a modified example of the cutting unit of FIG. 7. FIG. 10 is a drawing showing a modified example of the cutting unit illustrated in FIG. 9. FIG. 11 is a cross-sectional view illustrating another embodiment of a cutting unit according to one embodiment of the present invention. FIG. 12 is a drawing showing another example of a cutting unit according to one embodiment of the present invention. FIG. 13 is a drawing illustrating a modified example of the cutting unit shown in FIG. 12. FIGS. 14 and FIGS. 15 are drawings illustrating another example of a cutting unit according to one embodiment 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 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,