Method for manufacturing a secondary battery and apparatus for manufacturing a secondary battery

Abstract

The present invention relates to a method for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery. The method for manufacturing a secondary battery according to the present invention includes: an electrode supply process of supplying an electrode through an electrode supply unit; a first inspection process of inspecting the supplied electrode to distinguish a normal electrode portion from an abnormal electrode portion; and a cutting process of cutting the electrode that has undergone the first inspection process at a cutting portion, wherein the cutting process performs cutting by a laser so that the normal electrode portion and the abnormal electrode portion detected in the first inspection process are separated from each other.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of priority of Korean Patent Application No. 10 - 2020 - 0065215, filed on May 29, 2020, and the entire disclosure of the Korean patent application is incorporated herein by reference. Technical Field

[0003] The present invention relates to a method for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery. Background Art

[0004] Unlike a primary battery, a secondary battery is rechargeable and has a high probability of having a compact size and a high capacity. Therefore, many studies have been conducted on secondary batteries recently. With the development of technology and the increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing.

[0005] According to the shape of the battery case, rechargeable batteries are classified into coin - type batteries, cylindrical batteries, prismatic batteries, and pouch - type batteries. In a secondary battery, an electrode assembly installed in the battery case is a power generation device that can be charged and discharged, and has a structure in which electrodes and a separator are stacked.

[0006] Electrode assemblies can be roughly classified into wound - type electrode assemblies, stacked - type electrode assemblies, and stacked / folded - type electrode assemblies. In a wound - type electrode assembly, a separator is inserted between a positive electrode and a negative electrode, and each of the positive electrode and the negative electrode is provided in the form of a sheet coated with an active material, and then the positive electrode, the separator, and the negative electrode are wound. In a stacked - type electrode assembly, a plurality of positive and negative electrodes and the separator interposed therebetween are sequentially stacked. In a stacked / folded - type electrode assembly, a plurality of stacked unit cells are wound together with an isolation film having a long length.

[0007] According to the prior art, the cutting process of the electrode is performed by pressing. Here, in the case of pressing, unless the mold is changed, the cutting shape does not change, and when a defect is determined in the electrode before the cutting process, the operation of the device can be manually stopped to display the defect. After that, even after the cutting process, the production rate is reduced to display and process the defect. Therefore, there is a problem of reduced manufacturing productivity.

[0008] [Prior Art Document] (Patent Document) Korean Patent Publication No. 10 - 2014 - 0015647 Summary of the Invention

[0009] Technical problem

[0010] One aspect of the present invention provides a method for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery that can allow continuous operation during the manufacture of the secondary battery without moving the equipment to improve the manufacturing productivity.

[0011] Technical solution

[0012] The method for manufacturing a secondary battery according to an embodiment of the present invention includes: an electrode supply process of supplying an electrode through an electrode supply unit; a first inspection process of detecting the supplied electrode through a first inspection unit to distinguish a normal electrode portion and an abnormal electrode portion; and a cutting process of cutting the electrode that has undergone the first inspection process at a cutting portion, wherein the cutting process performs cutting by a laser so that the normal electrode portion and the abnormal electrode portion detected in the first inspection process are separated from each other.

[0013] In addition, the apparatus for manufacturing a secondary battery according to an embodiment of the present invention includes: an electrode supply unit configured to supply an electrode; a first inspection unit configured to detect the supplied electrode to distinguish a normal electrode portion and an abnormal electrode portion from each other; and a cutting portion configured to cut the electrode that has passed through the first inspection unit, wherein the cutting portion cuts the electrode by a laser so that the normal electrode portion and the abnormal electrode portion detected in the first inspection unit are separated from each other.

[0014] Advantageous effects

[0015] According to the present invention, the normal electrode portion and the abnormal electrode portion of the electrode can be cut into different shapes by a laser to perform continuous operation without moving the equipment, thereby improving the manufacturing productivity. Thereafter, when manufacturing a plurality of batteries including the cut electrode, defective batteries including the abnormal electrode portion (cut as the abnormal electrode portion) can be detected and excluded to perform continuous operation without moving the equipment, thereby significantly improving the manufacturing productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view showing an example of an apparatus for manufacturing a secondary battery according to an embodiment of the present invention.

[0017] Figure 2 is a perspective view showing a first inspection process and a cutting process in a method for manufacturing a secondary battery according to an embodiment of the present invention.

[0018] Figure 3 is a front view showing an example of an apparatus for manufacturing a secondary battery according to another embodiment of the present invention.

[0019] Figure 4is a perspective view showing a first inspection process and a cutting process in a method for manufacturing a secondary battery according to another embodiment of the present invention.

[0020] Figure 5 is a perspective view showing a second inspection process, a battery cutting process, and an exclusion process in a method for manufacturing a secondary battery according to another embodiment of the present invention. Detailed Description

[0021] The objects, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that reference numerals are added to the components of the drawings of this specification as identically as possible, even if they are shown in other drawings. In addition, the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. In the following description of the present invention, detailed descriptions of related parts that may unnecessarily obscure the gist of the present invention will be omitted.

[0022] Method for manufacturing a secondary battery according to an embodiment

[0023] Figure 1 is a front view showing an example of an apparatus for manufacturing a secondary battery according to an embodiment of the present invention, Figure 2 is a perspective view showing a first inspection process and a cutting process in a method for manufacturing a secondary battery according to an embodiment of the present invention.

[0024] See Figure 1 and Figure 2 According to an embodiment of the present invention, a method for manufacturing a secondary battery includes an electrode supply process of supplying an electrode 10, a first inspection process of detecting the electrode 10 in a first inspection unit V1 to distinguish a normal electrode portion from an abnormal electrode portion, and a cutting process of cutting the electrode at a cutting unit 130.

[0025] In addition, a method for manufacturing a secondary battery according to an embodiment of the present invention may further include a winding process of winding the cut electrode 10 around an electrode winding unit 140.

[0026] More specifically, see Figure 1 In the electrode supply process, the electrode 10 may be supplied through an electrode supply unit 110. Here, the electrode supply unit 110 includes an electrode supply roller 111 around which the electrode 10 is wound. In the electrode supply process, the electrode 10 wound around the electrode supply roller 111 may be unwound to supply the electrode 10 to a position for subsequent processing. Here, the electrode 10 may be wound around the electrode supply roller 111 in various forms such as a sheet or a film.

[0027] In the electrode supply process, the supply speed of the electrode 10 may be adjusted according to the speed at which the cutting is performed in the cutting process.

[0028] In the electrode supply process, the electrode supply unit 110 may include a roller R for supplying electrodes. Here, the rotational speed of each roller R can be adjusted to adjust the supply rate.

[0029] In the first inspection process, the first inspection unit V1 detects the supplied electrode 10 to distinguish the normal electrode portion from the abnormal electrode portion from each other.

[0030] In addition, in the first inspection process, the first inspection unit V1 can distinguish the normal electrode portion from the abnormal electrode portion through a vision sensor, and can transmit a cutting signal to the cutting unit 130 through the main control system 120. Here, when transmitting the cutting signal to the cutting unit 130, the main control system 120 can transmit the cutting type signal together. In this case, the method for manufacturing a secondary battery according to an embodiment of the present invention may further include a control process of controlling the cutting unit 130 in the main control system 120 to adjust the cutting shape of the electrode 10.

[0031] In addition, in the first inspection process, for example, the first inspection unit V1 senses a defective electrode display label (NG Tag) T attached to the defective portion of the electrode 10 to detect the normal electrode portion and the abnormal electrode portion. In the first inspection process, as another example, the second inspection unit V2 can sense the shape of the electrode 10 to detect the normal electrode portion and the abnormal electrode portion. Here, the normal electrode portion and the abnormal electrode portion can be detected by sensing the width dimension, deformation, application state of the active material, etc. in the electrode 10.

[0032] In the cutting process, the electrode 10 that has undergone the first inspection process can be cut in the cutting unit 130.

[0033] In addition, in the cutting process, the laser B can be irradiated onto the electrode 10 by the laser 131 to perform cutting, so that the normal electrode portion and the abnormal electrode portion detected in the first inspection process are separated from each other.

[0034] In addition, in the cutting process, the cutting unit 130 can cut the normal electrode portion and the abnormal electrode portion distinguished from each other in the first inspection unit V1 into different shapes based on the received cutting signal.

[0035] In the notch processing, the normal electrode portion is notched to form the electrode tab 11, while the abnormal electrode portion is notched into at least one of a marked shape, a shape with a hole, or the shape of the cut electrode tab 11'. Here, in the notch processing, the notch portion 130 irradiates the laser beam B to the side end of the abnormal electrode portion in the electrode 10 by the laser 131 to notch the abnormal electrode portion, so that the shape of the electrode tab 11 at the abnormal electrode portion is different from the shape of the electrode tab 11 at the normal electrode portion. Here, more specifically, the notch shape of the abnormal electrode portion may have: a shape in which a rectangular electrode tab 11' is cut out and the portion to form the electrode tab 11' is short; a shape in which the edge of the portion to form the electrode tab 11'' is chamfered; a marked shape forming a pattern; or a shape forming a circular hole or a polygonal hole.

[0036] In the winding process, the notched electrode 10 can be wound around the electrode winding portion 140. Here, the electrode winding portion 140 may include an electrode winding drum 141 around which the electrode 10 is wound, so as to wind the electrode 10 moving in the winding process around the electrode winding drum 141.

[0037] See Figure 1 and Figure 2 In the method for manufacturing a secondary battery having the above configuration according to an embodiment of the present invention, the normal electrode portion and the abnormal electrode portion in the supplied electrode 10 can be distinguished from each other by the first inspection unit V1, and then notched into different shapes by the laser 131 to perform continuous processing without moving the equipment, thereby improving the manufacturing productivity.

[0038] Method for manufacturing a secondary battery according to another embodiment

[0039] Hereinafter, a method for manufacturing a secondary battery according to another embodiment of the present invention will be described.

[0040] Figure 3 is a front view showing an example of an apparatus for manufacturing a secondary battery according to another embodiment of the present invention, Figure 4 is a perspective view showing a first inspection process and a notch process in a method for manufacturing a secondary battery according to another embodiment of the present invention, Figure 5 is a perspective view showing a second inspection process, a battery cutting process, and an exclusion process in a method for manufacturing a secondary battery according to another embodiment of the present invention.

[0041] See Figure 3 and Figure 5, A method for manufacturing a secondary battery according to another embodiment of the present invention includes an electrode supply process of supplying an electrode 10, a first inspection process of detecting the electrode 10 in a first inspection unit V1 to distinguish a normal electrode portion from an abnormal electrode portion, and a cutting process of cutting the electrode 10 at a cutting portion 130. In addition, a method for manufacturing a secondary battery according to another embodiment of the present invention may further include a lamination process of laminating the electrode 10 and a separator 20 after the cutting process, a second inspection process of detecting, by a second inspection unit V2, an electrode portion cut into an abnormal electrode portion, a battery cutting process of cutting the electrode portion into a plurality of cells 30, and an exclusion process of excluding defective cells 30' including the abnormal electrode portion.

[0042] A method for manufacturing a secondary battery according to another embodiment of the present invention is different from the method for manufacturing a secondary battery according to the foregoing embodiment of the present invention in that the method for manufacturing a secondary battery according to another embodiment of the present invention further includes a lamination process, a second inspection process, a battery cutting process, and an exclusion process. Therefore, when describing the method for manufacturing a secondary battery according to another embodiment of the present invention, content repeated with the method for manufacturing a secondary battery according to the foregoing embodiment of the present invention will be omitted or briefly described, and the differences therebetween will be mainly described.

[0043] More specifically, referring to Figures 3 to 5 , in the electrode supply process, the electrode 10 can be supplied through an electrode supply unit 110.

[0044] In the electrode supply process, the supply speed of the electrode 10 can be adjusted according to the speed at which the cutting is performed in the cutting process.

[0045] In the electrode supply process, the electrode supply unit 110 may include a roller R for supplying the electrode 10. Here, the rotational speed of each roller R can be adjusted to adjust the supply speed.

[0046] In the first inspection process, the first inspection unit V1 detects the supplied electrode 10 to distinguish a normal electrode portion from an abnormal electrode portion.

[0047] In the first inspection process, the first inspection unit V1 can distinguish a normal electrode portion from an abnormal electrode portion through a vision sensor and transmit a cutting signal to the cutting portion 130 through a main control system 220.

[0048] In the cutting process, the electrode 10 that has undergone the first inspection process can be cut at the cutting portion 130.

[0049] In addition, in the cutting process, the normal electrode portion and the abnormal electrode portion detected in the first inspection process can be cut through a laser 131 to separate them from each other.

[0050] In addition, in the incision process, the incision portion 130 can incise the normal electrode portion and the abnormal electrode portion, which are distinguishable from each other in the first inspection unit V1, into different shapes based on the received incision signal.

[0051] In the incision process, the normal electrode portion is incised to form the electrode tab 11, and the abnormal electrode portion is incised into at least one of a shape with a mark, a shape with a hole, or a shape of a cut electrode tab 11'. Here, in the incision process, the incision portion 130 can irradiate the side end of the abnormal electrode portion in the electrode 10 with the laser B through the laser 131 to incise the abnormal electrode portion, so that the shape of the electrode tab 11 at the abnormal electrode portion is different from the shape of the electrode tab 11 at the normal electrode portion. Here, more specifically, the incision shape of the abnormal electrode portion can have: a shape in which a rectangular electrode tab 11' is cut out and the portion to form the electrode tab 11' is short; a shape in which the edge of the portion to form the electrode tab 11'' is chamfered; a marked shape forming a pattern; or a shape forming a circular hole or a polygonal hole.

[0052] After the incision process, in the lamination process, the electrode 10 and the separator 20 can be alternately stacked for lamination. Here, in the lamination process, heat and pressure are applied to the stack S of the incised electrode 10 and the separator 20 through the lamination unit 260. Thus, the electrode 10 and the separator 20 can be bonded to each other.

[0053] Here, the separator 20 wound around the separator supply roller 250 can be unwound to supply the separator 20 to the lamination unit 260.

[0054] After the lamination process, in the second inspection process, the second inspection unit V2 can detect the electrode portion incised as the abnormal electrode portion. Here, in the second inspection process, the cut electrode tab 11', the mark, or the hole of the electrode portion incised as the abnormal electrode portion can be sensed through the second inspection unit V2 including a vision sensor to detect the abnormal electrode portion, and thus a detection signal is transmitted to the exclusion unit 280.

[0055] After the second inspection process, in the battery cutting process, the stack S of the laminated electrode 10 and the separator 20 can be cut into a plurality of batteries 30. Here, in the battery cutting process, the stack S of the electrode 10 and the separator 20 disposed between a pair of cutters can be cut through the battery cutting unit 270 including a pair of cutters.

[0056] In this case, the cut batteries 30 can be transferred to subsequent processing through the conveyor belts C1 and C2.

[0057] After the cutting process, in the exclusion process, the exclusion unit 280 can exclude defective cells 30' including abnormal electrode portions detected through the second inspection process from the plurality of cells 30. Here, in the exclusion process, the defective cells 30' including abnormal electrode portions can be grasped by the exclusion unit 280 including a jig to separate the defective cells 30' from the cells 30 including normal electrode portions.

[0058] In the method for manufacturing a secondary battery configured as described above according to another embodiment of the present invention, the normal electrode portion and the abnormal electrode portion of the electrode 10 can be cut into different shapes by a laser 131. Then, the defective cells 30' including the abnormal electrode portion (which is cut into an abnormal electrode portion) can be detected in a subsequent inspection process and then excluded in the exclusion process. Therefore, continuous operations can be performed without moving the equipment, significantly improving the manufacturing productivity.

[0059] Device for manufacturing a secondary battery according to an embodiment

[0060] Hereinafter, an apparatus for manufacturing a secondary battery according to an embodiment of the present invention will be described.

[0061] See Figure 1 and Figure 2 As shown in FIGS. and, the apparatus 100 for manufacturing a secondary battery according to an embodiment of the present invention includes an electrode supply unit 110 that supplies an electrode 10, a first inspection unit V1 that inspects the supplied electrode 10 to distinguish between a normal electrode portion and an abnormal electrode portion, a cutting unit 130 that cuts the electrode 10 that has passed through the first inspection unit V1, and a main control system 120 that receives a cutting signal from the first inspection unit V1 and transmits the cutting signal to the cutting unit 130. In addition, the apparatus 100 for manufacturing a secondary battery according to an embodiment of the present invention may further include an electrode winding unit 140 that winds the electrode 10.

[0062] The apparatus 100 for manufacturing a secondary battery according to an embodiment of the present invention relates to an apparatus for manufacturing a secondary battery applied to the methods for manufacturing a secondary battery according to the foregoing embodiments and another embodiment of the present invention.

[0063] Therefore, when describing the apparatus 100 for manufacturing a secondary battery according to the present embodiment, the content that is repeated with the apparatuses according to the foregoing embodiments and another embodiment of the present invention will be omitted or briefly described, and the differences will be mainly described.

[0064] More specifically, the electrode supply unit 110 can supply the electrode 10. Here, the electrode supply unit 110 includes an electrode supply drum 111 around which the electrode 10 is wound, and the electrode 10 wound around the electrode supply drum 111 can be unwound to supply the electrode 10 to a position for subsequent processing.

[0065] In addition, the electrode supply unit 110 can adjust the supply rate of the electrode 10 according to the speed at which the cutting unit 130 performs cutting. Here, the electrode supply unit 110 can include a roller R for supplying the electrode 10. Here, the rotational speed of each roller R can be adjusted to adjust the supply rate.

[0066] The first inspection unit V1 can detect the supplied electrode 10 to distinguish the normal electrode portion from the abnormal electrode portion from each other.

[0067] In addition, the first inspection unit V1 can distinguish the normal electrode portion and the abnormal electrode portion through a vision sensor to transmit a cutting signal.

[0068] For example, the first inspection unit V1 senses a defective electrode display label (NG Tag) T attached to the defective portion of the electrode 10 to detect the normal electrode portion and the abnormal electrode portion.

[0069] For another example, the second inspection unit V2 can sense the shape of the electrode 10 to detect the normal electrode portion and the abnormal electrode portion. Here, the normal electrode portion and the abnormal electrode portion can be detected by sensing the width dimension, deformation, application state of the active material, etc. in the electrode 10.

[0070] The main control system 120 can receive the cutting signal from the first inspection unit V1 to transmit the cutting signal to the cutting unit 130. Here, when transmitting the cutting signal to the cutting unit 130, the main control system 120 can transmit the cutting type signal together. That is, the cutting shape of the electrode 10 can be adjusted by controlling the cutting unit 130 in the main control system 120.

[0071] The cutting unit 130 can cut the electrode 10 that has passed through the first inspection unit V1.

[0072] In addition, the cutting unit 130 can cut the electrode 10 through the laser 131 so that the normal electrode portion and the abnormal electrode portion detected in the first inspection unit V1 are separated from each other.

[0073] Furthermore, the cutting unit 130 can cut the normal electrode portion and the abnormal electrode portion that are distinguished from each other in the first inspection unit V1 into different shapes based on the received cutting signal.

[0074] In addition, the cutting unit 130 can cut the normal electrode portion to form an electrode tab 11. Here, the cutting unit 130 can irradiate the side end of the normal electrode portion with the laser B through the laser 131 to form a rectangular electrode tab 11.

[0075] In addition, the incision part 130 can incise the abnormal electrode part into at least one of a marked shape, a shape with a hole, or the shape of the cut electrode tab 11'. Here, the incision part 130 can irradiate the side end of the abnormal electrode part in the electrode 10 with the laser B through the laser 131 to incise the abnormal electrode part, so that the shape of the electrode tab 11 at the abnormal electrode part is different from the shape of the electrode tab 11 at the normal electrode part. Here, more specifically, the incision shape of the abnormal electrode part can have: a shape in which a rectangular electrode tab 11' is cut out and the part to form the electrode tab 11' is shorter; a shape in which the edge of the part to form the electrode tab 11" is chamfered; a marked shape forming a pattern; or a shape forming a circular hole or a polygonal hole.

[0076] The electrode winding part 140 can wind the incised electrode 10 that has passed through the incision part 130. Here, the electrode winding part 140 can include an electrode winding roller 141 around which the electrode 10 is wound, and the electrode 10 moves around the electrode winding roller 141 to be wound.

[0077] Device for manufacturing a secondary battery according to another embodiment

[0078] Hereinafter, an apparatus for manufacturing a secondary battery according to another embodiment of the present invention will be described.

[0079] See Figures 3 to 5 , an apparatus 200 for manufacturing a secondary battery according to another embodiment of the present invention includes an electrode supply part 110 for supplying the electrode 10, a first inspection part V1 for detecting the supplied electrode 10 to distinguish the normal electrode part from the abnormal electrode part, an incision part 130 for incising the electrode 10 that has passed through the first inspection part V1, a main control system 220 for receiving an incision signal from the first inspection part V1 and transmitting the incision signal to the incision part 130, a lamination part 260 for laminating the incised electrode 10 and the separator 20, a second inspection part V2 for detecting the electrode part incised as an abnormal electrode part, a battery cutting part 270 for cutting the stack S of the electrode 10 and the separator 20 into a plurality of batteries 30, and an exclusion part 280 for excluding the defective battery 30' including the abnormal electrode part.

[0080] The difference between the apparatus 200 for manufacturing a secondary battery according to another embodiment of the present invention and the apparatus for manufacturing a secondary electrode according to the foregoing embodiment of the present invention is that the apparatus 200 further includes a lamination part 260, a second inspection part V2, a battery cutting part 270, and an exclusion part 280.

[0081] Therefore, in the description of the apparatus 200 for manufacturing a secondary battery according to the present embodiment, the content that is repeated with the apparatus according to the foregoing embodiment of the present invention will be omitted or briefly described, and the differences will be mainly described.

[0082] More specifically, the electrode supply unit 110 can supply the electrode 10. Here, the electrode supply unit 110 includes an electrode supply roller 111 around which the electrode 10 is wound, and the electrode 10 wound around the electrode supply roller 111 can be unwound to supply the electrode 10 to a position for subsequent processing.

[0083] Moreover, the electrode supply unit 110 can adjust the supply rate of the electrode 10 according to the cutting speed of the cutting unit 130. Here, the electrode supply unit 110 can include a roller R for supplying the electrode 10. Here, the rotational speed of each roller R can be adjusted to adjust the supply rate.

[0084] The first inspection unit V1 can detect the supplied electrode 10 to distinguish the normal electrode portion from the abnormal electrode portion from each other.

[0085] The first inspection unit V1 can distinguish the normal electrode portion and the abnormal electrode portion through a visual sensor to transmit a cutting signal.

[0086] The main control system 220 can receive the cutting signal to transmit the cutting signal to the cutting unit 130. Here, when transmitting the cutting signal to the cutting unit 130, the main control system 220 can transmit a cutting type signal together.

[0087] The cutting unit 130 can cut the electrode 10 that has passed through the first inspection unit V1.

[0088] In addition, the cutting unit 130 can cut the electrode through the laser 131 so that the normal electrode portion and the abnormal electrode portion detected in the first inspection unit V1 are separated from each other.

[0089] The cutting unit 130 can cut the normal electrode portion and the abnormal electrode portion distinguished from each other in the first inspection unit V1 into different shapes based on the received cutting signal.

[0090] The cutting unit 130 can cut the normal electrode portion to form an electrode tab 11, and cut the abnormal electrode portion into at least one of a shape with a mark, a shape with a hole, or a shape of a cut electrode tab 11'.

[0091] The lamination unit 260 can alternately stack the cut electrode 10 and the separator 20 to laminate the electrode 10 and the separator 20. Here, the lamination unit 260 can press the stack S of the cut electrode 10 and the separator 20 while applying heat to bond the electrode 10 and the separator 20 to each other.

[0092] Here, the separator 20 wound around the separator supply roller 250 can be unwound to supply the separator 20 to the lamination unit 260.

[0093] After passing through the lamination unit 260, the second inspection unit V2 can detect the electrode portions that are cut into abnormal electrode portions. Here, the second inspection unit V2 can detect the cut electrode tabs 11', marks, or holes of the electrode portions that are cut into abnormal electrode portions through a vision sensor to detect the abnormal electrode portions, and thus transmit a detection signal to the exclusion unit 280.

[0094] The battery cutting unit 270 can cut the stack S of the electrode 10 and the separator 20 laminated after passing through the second inspection unit V2 into a plurality of batteries 30. Here, the battery cutting unit 270 can include a pair of cutters, and can cut the stack S of the electrode 10 and the separator 20 disposed between the pair of cutters while vertically moving the pair of cutters.

[0095] Then, the cut batteries 30 can be conveyed to subsequent processing through the conveyor belts C1 and C2.

[0096] After passing through the battery cutting unit 270, the exclusion unit 280 can exclude the defective batteries 30' including abnormal electrode portions detected by the second inspection unit V2 from the plurality of batteries 30. Here, the exclusion unit 280 can grasp the defective batteries 30' including abnormal electrode portions through a jig to separate the defective batteries 30' from the batteries 30 including normal electrode portions.

[0097] Although the present invention has been specifically shown and described with reference to the exemplary embodiments of the present invention, it should be understood that the scope of the present invention is not limited thereto. Those of ordinary skill in the art will understand that various changes can be made to it in form and detail without departing from the spirit and scope of the present invention.

[0098] In addition, the protection scope of the present invention will be defined by the appended claims.

[0099] [Reference Signs]

[0100] 10: Electrode

[0101] 11, 11', 11": Electrode tabs

[0102] 20: Separator

[0103] 30: Battery

[0104] 100, 200: Equipment for manufacturing secondary batteries

[0105] 110: Electrode supply unit

[0106] 111: Electrode supply roller

[0107] 120: Main control system

[0108] 130: Notching unit

[0109] 131: Laser

[0110] 140: Electrode winding section

[0111] 141: Electrode winding drum

[0112] 250: Diaphragm supply drum

[0113] 260: Laminating section

[0114] 270: Battery cutting section

[0115] 280: Excluding section

[0116] B: Laser

[0117] C1, C2: Conveyor belt

[0118] R: Roller

[0119] V1: First inspection section

[0120] V2: Second inspection section

Claims

1. A method for manufacturing a secondary battery, the method comprising: An electrode supply process of supplying an electrode through an electrode supply unit; A first inspection process of inspecting the supplied electrode by a first inspection unit to determine a normal electrode portion and an abnormal electrode portion; And A cutting process of cutting the electrode that has undergone the first inspection process by a laser in a cut portion, Wherein, in the first inspection process, the first inspection unit determines the normal electrode portion and the abnormal electrode portion through a vision sensor to transmit a cutting signal to the cut portion through a main control system, Wherein, in the cutting process, the cut portion cuts the normal electrode portion to form an electrode tab, and cuts the abnormal electrode portion into a shape different from the electrode tab to distinguish the abnormal electrode portion from the normal electrode portion.

2. The method according to claim 1, wherein In the cutting process, the abnormal electrode portion is cut into at least one of a shape with a mark, a shape with a hole, or a shape of a cut electrode tab.

3. The method according to claim 1, wherein In the electrode supply process, the supply rate of the electrode is adjusted according to the cutting speed performed in the cutting process.

4. The method according to claim 3, wherein, In the electrode supply process, the electrode supply unit includes a roller for supplying the electrode, Wherein the rotational speed of each roller is adjusted to adjust the supply rate of the electrode.

5. The method according to claim 1, further comprising a winding process of winding the electrode that has undergone the cutting process around an electrode winding portion.

6. The method according to claim 1, further comprising, after the cutting process: A lamination process of alternately stacking the electrode and the separator to laminate the electrode and the separator; A second inspection process of inspecting the electrode portion cut as the abnormal electrode portion by a second inspection unit after the lamination process; A battery cutting process of cutting the stack of the laminated electrode and the separator into a plurality of batteries; And An exclusion process of excluding defective batteries from the plurality of batteries by an exclusion unit after the cutting process, the defective batteries including the abnormal electrode portion detected by the second inspection process.

7. An apparatus for manufacturing a secondary battery, the apparatus comprising: An electrode supply unit configured to supply an electrode; A first inspection unit configured to inspect the supplied electrode to determine a normal electrode portion and an abnormal electrode portion; A cut portion configured to cut the electrode that has passed through the first inspection unit by a laser, Wherein the first inspection unit determines the normal electrode portion and the abnormal electrode portion through a vision sensor to transmit a cutting signal, The apparatus further includes a main control system configured to receive the cutting signal to transmit the cutting signal to the cut portion, Wherein the cut portion cuts the normal electrode portion to form an electrode tab based on the received cutting signal, and cuts the abnormal electrode portion into a shape different from the electrode tab to distinguish the abnormal electrode portion from the normal electrode portion.

8. The device according to claim 7, wherein the abnormal electrode portion is cut into at least one of a shape with a mark, a shape with a hole, or a shape of a cut electrode tab.

9. The device according to claim 7, wherein the electrode supply unit is configured to adjust the supply rate of the electrode according to the speed at which the cutting is performed in the cutting portion.

10. The device according to claim 9, wherein the electrode supply unit includes a roll for supplying the electrode, wherein the rotational speed of each roll is adjusted to adjust the supply rate of the electrode.

11. The device according to claim 7, further comprising an electrode winding unit configured to wind the electrode that has passed through the cutting portion.

12. The device according to claim 7, further comprising: a lamination unit configured to alternately stack the electrode and the separator for lamination; a second inspection unit configured to detect the electrode portion that has been cut into the abnormal electrode portion and has passed through the lamination unit; a battery cutting unit configured to cut the stack of the laminated electrode and the separator into a plurality of batteries after the stack has passed through the second inspection unit; and an exclusion unit configured to exclude defective batteries from the plurality of batteries after passing through the cutting unit, the defective batteries including the abnormal electrode portion detected by the second inspection unit.

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