CN-122000489-A - Apparatus for manufacturing secondary battery and electrode plate cutting unit

Abstract

The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit, which have good fixing strength and stably maintain cutting accuracy due to fixedly pressing a lower cutter using a high-strength spring, to prevent active material from being embedded and to improve quality of a cutting surface when cutting an electrode plate. The apparatus includes a conveying unit configured to convey an electrode plate as a cutting target along a conveying path, a winding unit configured to receive and wind the cut electrode plate conveyed by the conveying unit, and a cutting unit having an upper cutter installed above the conveying path to move upward and downward, a fixed body fixed below the conveying path to provide a supporting strength, a lower cutter supported by the fixed body and configured to cut the electrode plate by a cross motion with the upper cutter, and an elastic support elastically supporting the lower cutter toward the fixed body to maintain a fixed state of the lower cutter with respect to the fixed body.

Inventors

• Quan Junhuan
• JIN ZHENHUAN
• Lin Zhongmen
• JIANG FENGXIN

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20250721

Priority Date

20241106

Claims (20)

1. 1. An apparatus for manufacturing a secondary battery, comprising: A conveying unit configured to convey an electrode plate as a cutting target along a conveying path; A winding unit configured to receive and wind the cut electrode plates conveyed by the conveying unit, and A cutting unit having an upper cutter installed above the transfer path to move upward and downward; the electrode assembly includes a conveying path, a fixing body fixed below the conveying path to provide supporting strength, a lower cutter supported by the fixing body and configured to cut the electrode plate by a cross motion with the upper cutter, and an elastic support to elastically support the lower cutter toward the fixing body to maintain a fixed state of the lower cutter with respect to the fixing body.
2. 2. The apparatus of claim 1, wherein the resilient support comprises: a horizontally extending shaft having one end portion passing through the lower cutter to be coupled to the fixed body, and extending horizontally; A pressing spring surrounding the horizontally extending shaft, and And a spring support pressing the pressing spring toward the lower cutter so that the pressing spring presses the lower cutter toward the fixed body.
3. 3. The apparatus of claim 2, wherein a threaded portion is formed on the horizontally extending shaft, and The spring support includes: a spring cover through which the horizontally extending shaft passes, and A pressing force control nut coupled to the threaded portion to move the spring cover forward toward the pressing spring.
4. 4. The apparatus of claim 1, further comprising a positioning guide formed between the stationary body and the lower cutter, the positioning guide configured to guide a mounting position of the lower cutter relative to the stationary body.
5. 5. The apparatus of claim 4, wherein the positioning guide comprises: a positioning groove formed in a surface facing the lower cutter or the fixing body, and An insertion portion formed on the fixing body or the lower cutter and fitted into the positioning groove.
6. 6. The device of claim 3, wherein a plurality of guide grooves are formed in the fixing body, the plurality of guide grooves being parallel to the horizontally extending shaft and open to face the spring cover, and The spring cover is provided with a balance arm that extends horizontally while being fixed to the spring cover and is slidably inserted into the guide groove to prevent tilting of the spring cover.
7. 7. The apparatus of claim 1, wherein the resilient support comprises: a fixing bracket supported by the fixing body at the opposite side of the lower cutter, and A pressing spring which is fitted between the fixing bracket and the lower cutter in a compressed state, and elastically presses the lower cutter toward the fixing body while being supported by the fixing bracket.
8. 8. The apparatus of claim 7, further comprising a spacer provided between the stationary body and the stationary bracket, the spacer configured to adjust a gap between the stationary body and the stationary bracket.
9. 9. The apparatus of claim 7, further comprising a spring pusher mounted on the fixed bracket, the spring pusher pressing the pressing spring toward the lower cutter.
10. 10. The apparatus of claim 9, wherein an internally threaded bore is formed in the stationary bracket, and The spring pusher includes: A threaded shaft threadedly coupled to the internally threaded bore; a push plate provided on one end portion of the threaded shaft to transmit a pressing force to the pressing spring, and A torque input unit configured to apply an axial rotational force to the threaded shaft.
11. 11. A cutting unit for an electrode plate, comprising: An upper cutter installed above the transfer path of the electrode plate moving along the transfer path; a fixing body fixed below the conveying path to provide supporting strength; a lower cutter supported by the fixed body to cut the electrode plate by a cross motion with the upper cutter, and And an elastic support member elastically supporting the lower cutter toward the fixing body to maintain a fixed state of the lower cutter with respect to the fixing body.
12. 12. The electrode plate cutting unit according to claim 11, wherein the elastic support comprises: a horizontally extending shaft having one end portion passing through the lower cutter to be coupled to the fixed body, and extending horizontally; A pressing spring surrounding the horizontally extending shaft, and And a spring support pressing the pressing spring toward the lower cutter such that the pressing spring presses the lower cutter toward the fixed body.
13. 13. The electrode plate cutting unit according to claim 12, wherein a screw portion is formed on the horizontally extending shaft, and The spring support includes: a spring cover through which the horizontally extending shaft passes, and A pressing force control nut coupled to the threaded portion to move the spring cover forward toward the pressing spring.
14. 14. The electrode plate cutting unit according to claim 11, further comprising a positioning guide formed between the fixing body and the lower cutter, the positioning guide configured to guide a mounting position of the lower cutter with respect to the fixing body.
15. 15. The electrode plate cutting unit according to claim 14, wherein the positioning guide comprises: a positioning groove formed in a surface facing the lower cutter or the fixing body, and An insertion portion formed on the fixing body or the lower cutter and fitted into the positioning groove.
16. 16. The electrode plate cutting unit according to claim 13, wherein a plurality of guide grooves are formed in the fixing body, the plurality of guide grooves being parallel to the horizontally extending shaft and open to face the spring cover, and The spring cover is provided with a balance arm that extends horizontally while being fixed to the spring cover and is slidably inserted into the guide groove to prevent tilting of the spring cover.
17. 17. The electrode plate cutting unit according to claim 11, the elastic support comprising: a fixing bracket supported by the fixing body at the opposite side of the lower cutter, and A pressing spring which is fitted between the fixing bracket and the lower cutter in a compressed state, and elastically presses the lower cutter toward the fixing body while being supported by the fixing bracket.
18. 18. The electrode plate cutting unit of claim 17, further comprising a spacer provided between the fixing body and the fixing bracket, the spacer configured to adjust a gap between the fixing body and the fixing bracket.
19. 19. The electrode plate cutting unit according to claim 17, further comprising a spring pusher mounted on the fixed bracket, the spring pusher pressing the pressing spring toward the lower cutter.
20. 20. The electrode plate cutting unit according to claim 19, wherein an internal thread hole is formed in the fixing bracket, and The spring pusher includes: A threaded shaft threadedly coupled to the internally threaded bore; a push plate provided on one end portion of the threaded shaft to transmit a pressing force to the pressing spring, and A torque input unit configured to apply an axial rotational force to the threaded shaft.

Description

Apparatus for manufacturing secondary battery and electrode plate cutting unit Technical Field The present disclosure relates to the manufacture of secondary batteries, and more particularly, to an apparatus for manufacturing secondary batteries and an electrode plate cutting unit for secondary batteries. Background Unlike a primary battery that cannot be recharged, a secondary battery is a battery that can be charged and discharged. The secondary battery may generally include an electrode assembly (including a positive electrode plate, a separator, and a negative electrode plate), a case (or can) for accommodating the electrode assembly, a substrate tab formed by extending an uncoated portion of each electrode plate of the electrode assembly, an external terminal connected to the substrate tab, and the like. The information disclosed in this background section is for enhancement of understanding of the background of the disclosure and, therefore, it may contain information that does not form a related (or prior) art. Disclosure of Invention The present disclosure is directed to providing an apparatus for manufacturing a secondary battery and an electrode plate cutting unit for a secondary battery, in which a lower cutter has good fixing strength and stably maintains cutting accuracy, thereby preventing active material from being de-intercalated when cutting an electrode plate and improving quality of a cutting surface. According to aspects of the present disclosure, there is provided an apparatus for manufacturing a secondary battery, the apparatus including a conveying unit configured to convey an electrode plate as a cutting target along a conveying path, a winding unit configured to receive and wind the cut electrode plate conveyed by the conveying unit, and a cutting unit having an upper cutter mounted above the conveying path to move up and down, a fixed body fixed below the conveying path to provide a supporting strength, a lower cutter supported by the fixed body and configured to cut the electrode plate by a cross motion with the upper cutter, and an elastic support elastically supporting the lower cutter toward the fixed body to maintain a fixed state of the lower cutter with respect to the fixed body. According to another aspect of the present disclosure, there is provided an electrode plate cutting unit for a secondary battery, the electrode plate cutting unit including an upper cutter mounted above a transfer path of an electrode plate moving along the transfer path, a fixed body fixed below the transfer path to provide supporting strength, a lower cutter supported by the fixed body to cut the electrode plate by a cross motion with the upper cutter, and an elastic support to elastically support the lower cutter toward the fixed body to maintain a fixed state of the lower cutter with respect to the fixed body. Aspects and features of the present disclosure are not limited to those described herein, and other aspects and features not specifically mentioned herein will be clearly understood by those skilled in the art from the description of the present disclosure herein. Drawings The present disclosure, together with other objects, features and advantages thereof, will become more readily apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which: Fig. 1 is a schematic view illustrating an electrode assembly of a secondary battery that may be manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; Fig. 2 is a view illustrating the inside of a pouch-type battery to which the electrode assembly of fig. 1 is applied; Fig. 3 is a sectional view illustrating a cylindrical battery manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; fig. 4 is a perspective view illustrating the exterior of a prismatic battery that may be manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4; fig. 6 is a view illustrating a basic configuration of an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; Fig. 7 is a side view illustrating a state in which the upper cutter shown in fig. 6 moves downward in the cutting unit; Fig. 8 is a sectional view for describing an internal structure of the cutting unit of fig. 7; Fig. 9 is an exploded perspective view illustrating a modified example of the cutting unit of fig. 7; fig. 10 is a view illustrating a modified example of the cutting unit shown in fig. 9; fig. 11 is a cross-sectional view illustrating another example of a cutting unit according to an embodiment of the present disclosure; Fig. 12 is a view illustrating still another example of a cutting unit according to an em