Secondary battery manufacturing apparatus and secondary battery manufacturing method using the same

Abstract

The present invention relates to an apparatus for manufacturing a secondary battery and a method for manufacturing a secondary battery using the same, and more particularly to an apparatus for manufacturing a secondary battery that slits an electrode and a method for manufacturing a secondary battery using the same. The present invention provides an apparatus for manufacturing a secondary battery, further comprising: at least one unwinder unit that unwinds an electrode sheet on which an electrode active material is applied and dried; at least one first slitting unit that receives the electrode sheet from the unwinder unit and performs a primary cut on the electrode sheet to form a plurality of first unit electrode sheets; at least one second slitting unit that receives the first unit electrode sheet from the first slitting unit and performs a secondary cut on the first unit electrode sheet to form a plurality of second unit electrode sheets; at least one rewinder unit that receives the second unit electrode sheet from the second slitting unit and winds it up; and a frame unit having a slitting space provided therein; the first slitting unit and the second slitting unit are installed on the frame unit.

Description

Technical Field

[0003]

[0001] [Cross - reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2022 - 0020454, filed on February 16, 2022, and all the contents disclosed in the literature of the Korean patent application are incorporated herein by reference as part of this specification.

[0002] The present invention relates to a secondary battery manufacturing apparatus and a secondary battery manufacturing method using the same, and more particularly, to a secondary battery manufacturing apparatus for slitting an electrode and a secondary battery manufacturing method using the same.

Background Art

[0003] Generally, a secondary battery, unlike a primary battery that cannot be charged, refers to a battery that can be charged and discharged, and such secondary batteries are widely used in the field of advanced electronic devices such as mobile phones, laptop computers, and camcorders. <关于二次电池制造装置及方法的专利文本翻译内容开始,此处省略一些标记内容继续翻译>Such a secondary battery includes an electrode assembly in which electrodes and separator membranes are alternately laminated, and a case for housing the electrode assembly. The electrode assembly has a structure in which a plurality of electrodes and a plurality of separator membranes are alternately laminated.

[0005] And the secondary battery includes an electrode manufacturing process for manufacturing electrodes, an electrode assembly assembling process for laminating the manufactured electrodes and separator membranes to assemble an electrode assembly, and a process for manufacturing a secondary battery by housing the manufactured electrode assembly in a case.

[0006] Here, the electrode manufacturing process generally includes a coating process of coating and drying an electrode active material on an electrode sheet, a pressing process of pressing the electrode after the coating process, and a slitting process of cutting the electrode to a preset width after the pressing process.

[0007] ​​In the slitting process, a primary slitter and a secondary slitter sequentially cut the electrodes. However, conventionally, the primary and secondary slitters had redundant equipment such as rewinders and unwinders, which increased working time and resulted in a lower electrode yield.

[0008] Therefore, the development of technologies to solve the aforementioned problems is necessary. [Overview of the project] [Problems that the invention aims to solve]

[0009] The present invention was devised to solve the above-mentioned problems, and the object of the present invention is to provide a secondary battery manufacturing apparatus and a secondary battery manufacturing method using the same, which can significantly increase electrode productivity by introducing primary and secondary slitters into the electrode slitting apparatus and performing both primary and secondary slitting in a single piece of equipment. [Means for solving the problem]

[0010] The present invention provides a secondary battery manufacturing apparatus comprising: at least one unwinder section for unwinding an electrode sheet coated and dried with an electrode active material; at least one first slitting section for receiving the electrode sheet from the unwinder section and performing primary cutting to form a plurality of first unit electrode sheets; at least one second slitting section for receiving the first unit electrode sheets from the first slitting section and performing secondary cutting to form a plurality of second unit electrode sheets; at least one rewinder section for receiving and winding the second unit electrode sheets from the second slitting section; and a frame section having a slitting space inside; the first slitting section and the second slitting section being installed on the frame section.

[0011] Furthermore, the secondary battery manufacturing apparatus according to the present invention may further include at least one first position correction unit provided on the movement path of the electrode sheet, which senses the position of the electrode sheet and corrects the position of the electrode sheet.

[0012] The first position correction unit may be attached to the frame portion.

[0013] The first position correction unit may include a first position sensing unit that senses the position of the electrode sheet, and a first position adjustment unit that adjusts the position of the electrode sheet based on the position information of the electrode sheet obtained from the first position sensing unit.

[0014] The first position sensing unit may include an LPC sensor.

[0015] The first position adjustment unit may include a pivot roller.

[0016] Furthermore, the secondary battery manufacturing apparatus according to the present invention may further include at least one second position correction unit provided between the first slitting unit and the second slitting unit, which senses the position of the first unit electrode sheet and corrects the position of the first unit electrode sheet.

[0017] The second position correction unit may be provided in a manner corresponding to the number of first unit electrode sheets formed by cutting from the first slitting unit.

[0018] The second position correction unit may include a second position sensing unit that senses the position of the first unit electrode sheet, and a second position adjustment unit that adjusts the position of the first unit electrode sheet based on the position information of the first unit electrode sheet obtained from the second position sensing unit.

[0019] The second position sensing unit may include an LPC sensor.

[0020] The second position adjustment section may include a pivot roller.

[0021] The frame part may include a bottom part; a pair of column parts extending upward from the bottom part; a wall part coupled to side surfaces of the pair of column parts; and a lid part coupled to upper surfaces of the pair of column parts and having an insertion hole into which the electrode sheet is inserted into the slitting space.

[0022] The plurality of first unit electrode sheets branch and move from the first slitting part toward the pair of column parts, and a plurality of rewinder parts may be provided and fixedly installed on the pair of column parts so as to face each other.

[0023] The first slitting part and the second slitting part may be fixedly installed on the wall part.

[0024] On the other hand, the present invention includes an unwinding step of unwinding an electrode sheet coated and dried with an electrode active material; a first slitting step of forming a plurality of first unit electrode sheets by first cutting the electrode sheet after the unwinding step; a second slitting step of forming a plurality of second unit electrode sheets by second cutting the first unit electrode sheets after the first slitting step; and a rewinding step of winding up the second unit electrode sheets after the second slitting step. The unwinding step, the first slitting step, the second slitting step, and the rewinding step provide a method for manufacturing a secondary battery that is continuously performed.

[0025] And the method for manufacturing a secondary battery according to the present invention may further include a first position correction step of sensing the position of the electrode sheet and correcting the position of the electrode sheet between the unwinding step and the first slitting step.

[0026] Also, the method for manufacturing a secondary battery according to the present invention may further include a second position correction step of sensing the position of the first unit electrode sheet and correcting the position of the first unit electrode sheet between the first slitting step and the second slitting step.

Effects of the Invention

[0027] Since the present invention is performed by installing the first slitting unit and the second slitting unit on the frame unit in one device, the processes can be integrated, redundant devices can be removed, and the equipment can be simplified. There is an advantage in that the equipment space can be reduced and the investment cost during mass production can be saved.

[0028] Also, since the present invention includes the first position correction unit and / or the second position correction unit, it is possible to prevent the displacement of the electrode transferred for slitting, thereby reducing the product defect rate and improving the reliability of the product.

Brief Description of the Drawings

[0029] [Figure 1] It is a side view showing the state of the secondary battery manufacturing apparatus according to Embodiment 1 of the present invention. [Figure 2] In the secondary battery manufacturing apparatus of FIG. 1, it is a side view showing an enlarged state of the first slitting unit, the second slitting unit, the rewinder unit, and the frame unit. [Figure 3] It is a flowchart showing the flow of the secondary battery manufacturing method according to Embodiment 2 of the present invention.

Modes for Carrying Out the Invention

[0030] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. However, the present invention may be embodied in various different forms and is not limited or restricted by the following embodiments.

[0031] To clearly explain the present invention, a detailed description of parts not related to the explanation or known technologies that may obscure the gist of the present invention is omitted. In this specification, when adding reference numerals to the components of each drawing, the same or similar reference signs are given to the same or similar components throughout the specification.

[0032] Furthermore, the terms and words used in this specification and the claims shall not be interpreted in a manner limited to their ordinary and lexicographical meanings, but rather in a manner consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors themselves may define the concepts of terms as appropriate in order to best describe their invention.

[0033] Secondary battery manufacturing equipment The present invention provides a secondary battery manufacturing apparatus 1 further comprising: at least one unwinder section 100 for unwinding an electrode sheet coated and dried with an electrode active material; at least one first slitting section 200 for receiving the electrode sheet A0 from the unwinder section 100 and performing primary cutting to form a plurality of first unit electrode sheets A1; at least one second slitting section 300 for receiving the first unit electrode sheet A1 from the first slitting section 200 and performing secondary cutting to form a plurality of second unit electrode sheets A2; at least one rewinder section 400 for receiving and winding the second unit electrode sheets A2 from the second slitting section 300; and a frame section 700 having a slitting space inside.

[0034] First, the unwinder section 100 is configured to unwind the electrode sheet A0 on which the electrode active material has been coated and dried, and various configurations are possible. In this case, the electrode sheet A0 on which the electrode active material has been coated and dried may be understood in this industry as an electrode sheet A0 that has been coated after the coating process has been completed, and the electrode sheet A0 may consist of a positive electrode or a negative electrode.

[0035] Specifically, the unwinder unit 100 may include at least one unwinder roller 120 for unwinding the electrode sheet A0, and a main body 110 that rotatably supports the unwinder roller 120.

[0036] Here, the unwinder roller 120 may supply the electrode sheet A0, which has been coated and dried with electrode active material and wound into a roll, to the first slitting section 200, which will be described later, by rotating it.

[0037] In this case, since the unwinder roller 120 can rotate at the same speed in mutual synchronization with the rewinder roller 420 described later, the electrode sheet A0, the first unit electrode sheet A1, and the second unit electrode sheet A2 may be continuously transported on the secondary battery manufacturing apparatus 1.

[0038] On the other hand, the electrode sheet A0 unwound from the aforementioned unwinder section 100 may be transmitted to the first slitting section 200 and cut in the first slitting section 200. In this case, the electrode sheet A0 may be transmitted to the first slitting section 200 by a plurality of rollers, as shown in Figure 1.

[0039] Here, if the first slitting section 200 is provided inside the frame section 700 (described later) and the unwinder section 100 is provided outside the frame section 700, the electrode sheet A0 may be fed into the frame section 700 from the outside. In this case, some of the plurality of rollers may be rotatably supported by the roll support section 10, and the height of the roll support section 10 (height in the Z direction relative to Figure 1) may be set to correspond to the height of the frame section 700 (height in the Z direction relative to Figure 1).

[0040] Specifically, as shown in Figure 2, the first slitting section 200 may receive the electrode sheet A0 from the aforementioned unwinder section 100 and perform primary cutting of the electrode sheet A0. Note that the electrode sheet A0 passing through the inside of the first slitting section 200 is indicated by a dotted line.

[0041] Such a first slitting section 200 may include at least one cutter (not shown) for cutting the electrode sheet A0. Therefore, the first slitting section 200 may cut the electrode sheet A0 with the cutter to form a plurality of first unit electrode sheets A1.

[0042] In this case, the multiple first unit electrode sheets A1 may move in different directions from one another. For example, the first unit electrode sheets A1 may branch out from the first slitting portion 200 toward a pair of column portions 720, which will be described later. Here, the first unit electrode sheet A1 may be understood as an electrode having a width smaller than the width of the electrode sheet A0.

[0043] The first slitting section 200 may be provided in the internal slitting space of the frame section 700, which will be described later, as shown in Figure 2. More specifically, the first slitting section 200 may be installed in the wall section 730 of the frame section 700.

[0044] On the other hand, the first unit electrode sheet A1 formed from the first slitting section 200 may be supplied to the second slitting section 300.

[0045] Specifically, the second slitting section 300 may receive the first unit electrode sheet A1 from the first slitting section 200 and perform secondary cutting of the first unit electrode sheet A1. Note that the first unit electrode sheet A1 passing through the inside of the second slitting section 300 is shown by a dotted line.

[0046] Such a second slitting section 300 may include at least one cutter (not shown) for cutting the first unit electrode sheet A1. The second slitting section 300 may cut the first unit electrode sheet A1 to form a plurality of second unit electrode sheets A2. Here, the second unit electrode sheet A2 may be understood as an electrode sheet having a width smaller than the width of the first unit electrode sheet A1.

[0047] The second slitting portion 300 may be provided in the internal slitting space of the frame portion 700, which will be described later. In this case, the second slitting portion 300 may be installed on the wall portion 730 of the frame portion 700.

[0048] On the other hand, the second unit electrode sheet A2 formed by the second slitting section 300 may be wound up by the rewinder section 400.

[0049] Here, the rewinder section 400 is configured to receive and wind the second unit electrode sheet A2 from the second slitting section 300, and various configurations are possible.

[0050] The rewinder unit 400 may include at least one rewinder roller 420 for winding the second unit electrode sheet A2, and a main body 410 that rotatably supports the rewinder roller 420.

[0051] Here, the rewinder roller 420 is configured to wind the second unit electrode sheet A2 by rotation so that the second unit electrode sheet A2 is wound into a roll shape, and may rotate at the same speed in mutual synchronization with the unwinder roller 120 described above.

[0052] The rewinder section 400 may be installed on the frame section 700, which will be described later. More specifically, the rewinder section 400 may be provided in multiple units and fixedly installed on the pair of column sections 720 so as to face each other. In this case, if multiple rewinder sections 400 are installed on one column section 720, the rewinder sections 400 may be installed side by side in the vertical direction (Z direction based on Figure 2) on one column section 720.

[0053] On the other hand, the aforementioned first slitting section 200, second slitting section 300, and rewinder section 400 may be provided inside the frame section 700. Here, the frame section 700 has a configuration in which a slitting space is provided inside, and various configurations are possible.

[0054] For example, the frame portion 700 may include a bottom portion 710; a pair of column portions 720 extending upward from the bottom portion 710; a wall portion 730 connected to the sides of the pair of column portions 720; and a lid portion 740 connected to the upper surface of the pair of column portions 720, in which an insertion hole 700a into which the electrode sheet is inserted into the slitting space is formed.

[0055] Here, the bottom portion 710 is a part of the frame portion 700 that is provided to contact the ground, and can be understood as a configuration that supports a pair of column portions 720, which will be described later.

[0056] Furthermore, the column portion 720 is formed as an extension upward from the base portion 710, and various configurations are possible. Specifically, the column portion 720 may be provided in pairs and extended longitudinally upward (in the Z direction relative to Figure 2) from both ends of the base portion 710.

[0057] On the other hand, wall portions 730 may be attached to the sides of the pair of column portions 720. In this case, the wall portions 730 may have a plate shape and may be attached to the sides of the column portions (the surfaces located perpendicular to the XZ plane referenced in Figure 2) so that the frame portion 700 forms a slitting space inside.

[0058] As shown in Figure 2, the first slitting section 200 and the second slitting section 300 described above may be fixedly installed on the wall section 730. The second position correction section 600, which will be described later, may also be fixedly installed on the wall section 730.

[0059] Furthermore, the lid portion 740 has a configuration in which an insertion hole 700a is formed into which the electrode sheet is inserted into the slitting space, and various configurations are possible.

[0060] Specifically, the lid portion 740 may be provided so as to be connected to the upper surface (the surface located in the Z direction relative to Figure 2) of the pair of column portions 720 such that the frame portion 700 forms a slitting space inside.

[0061] Here, the input hole 700a is a through-hole that penetrates the inside and outside of the lid 740 and may be located anywhere on the lid 740. For example, the input hole 700a may be located in the center of the lid 740. Note that in this case, the input hole 700a is shown by a dotted line in Figures 1 and 2.

[0062] On the other hand, the aforementioned electrode sheet A0 may be displaced during the process of being moved for primary slitting. If slitting is performed with the electrode sheet A0 displaced, the width of the formed first unit electrode sheet A1 may become uneven, which could lead to defects in the finished product.

[0063] Therefore, the present invention may further include at least one first position correction unit 500 for correcting positional misalignment that occurs during the transfer process before the electrode sheet A0 is fed into the first slitting unit 200.

[0064] Specifically, the first position correction unit 500 may be provided on the movement path of the electrode sheet A0, sense the position of the electrode sheet A0 and correct the position of the electrode sheet A0.

[0065] Such a first position correction unit 500 may be attached to the frame unit 700. More specifically, the first position correction unit 500 may be attached to the frame unit 700 so as to be positioned close to the aforementioned input hole 700a. In this case, the first position sensing unit 520 and the first position adjustment unit 530, which will be described later, may be provided so as to face each other with the input hole 700a in between.

[0066] Such a first position correction unit 500 may include a first position sensing unit 520 that senses the position of the electrode sheet A0, and a first position adjustment unit 530 that adjusts the position of the electrode sheet A0 based on the position information of the electrode sheet A0 obtained from the first position sensing unit 520. In this case, the first position sensing unit 520 and the first position adjustment unit 530 may be fixedly supported by the main body 510.

[0067] Specifically, the first position sensing unit 520 is configured to sense the position of the electrode sheet A0, and various configurations are possible. For example, the first position sensing unit 520 may include an LPC (Line Position Control) sensor. In this case, the first position sensing unit 520 can sense the position on the electrode sheet A0 where the electrode active material is applied, i.e., the electrode active material application line, and acquire position information of the electrode sheet A0.

[0068] Furthermore, the first position adjustment unit 530 is configured to adjust the position of the electrode sheet A0 based on the position information of the electrode sheet A0 obtained from the first position sensing unit 520, and various configurations are possible.

[0069] For example, the first position adjustment unit 530 may include a pivot roller. The pivot roller may move in the width direction of the electrode sheet A0 (in a direction perpendicular to the XZ plane referenced in Figure 2). In this case, the movement of the first position adjustment unit 530 may be controlled by a control unit (not shown).

[0070] Here, the control unit (not shown) receives the position value of the electrode sheet A0 from the first position sensing unit 520 and compares the received position information of the electrode sheet A0 with information regarding a preset position value of the electrode sheet A0 to control the position of the first position adjustment unit 530.

[0071] On the other hand, the aforementioned first unit electrode sheet A1 may also experience misalignment during the process of moving it for secondary slitting. If the first unit electrode sheet A1 is slit while misaligned, the width of the resulting second unit electrode sheet A2 may become uneven, which could lead to defects in the finished product.

[0072] Therefore, the present invention may further include at least one second position correction unit 600 that corrects the position of the first unit electrode sheet A1 in order to prevent misalignment of the first unit electrode sheet A1 before it is secondary slit by the second slitting unit 300.

[0073] Specifically, the second position correction unit 600 is provided between the first slitting unit 200 and the second slitting unit 300; it may sense the position of the first unit electrode sheet A1 and correct its position. It may be attached to the wall portion 730 of the frame portion 700. In this case, it is preferable that the second position correction unit 600 is provided in a manner corresponding to the number of first unit electrode sheets A1 formed by cutting from the first slitting unit 200.

[0074] The second position correction unit 600 may include a second position sensing unit 620 that senses the position of the first unit electrode sheet A1, and a second position adjustment unit 630 that adjusts the position of the first unit electrode sheet A1 based on the position information of the first unit electrode sheet A1 obtained from the second position sensing unit 620. In this case, the second position sensing unit 620 and the second position adjustment unit 630 may be fixedly supported by the main body 610.

[0075] Specifically, the second position sensing unit 620 is configured to sense the position of the first unit electrode sheet A1, and various configurations are possible. For example, the second position sensing unit 620 may include an LPC (Line Position Control) sensor. In this case, the second position sensing unit 620 can sense the position on the first unit electrode sheet A1 where the electrode active material is applied, i.e., the electrode active material application line, and acquire position information of the first unit electrode sheet A1.

[0076] Furthermore, the second position adjustment unit 630 is configured to adjust the position of the first unit electrode sheet A1 based on the position information of the first unit electrode sheet A1 obtained from the second position sensing unit 620, and various configurations are possible.

[0077] For example, the second position adjustment unit 630 may include a pivot roller. The pivot roller may move in the width direction of the first unit electrode sheet A1 (in a direction perpendicular to the reference XZ plane in Figure 2). In this case, the movement of the second position adjustment unit 630 may be controlled by a control unit (not shown).

[0078] Here, the control unit can receive the position value of the first unit electrode sheet A1 from the second position sensing unit 620, compare the received position value of the first unit electrode sheet A1 with a preset position value of the first unit electrode sheet A1, and control the position of the second position adjustment unit 630.

[0079] Secondary battery manufacturing method The present invention may include an unwinding step (S10) in which an electrode sheet A0 coated with an electrode active material and dried is unwound; a first slitting step (S30) in which, after the unwinding step (S10), the electrode sheet A0 is primary-cut to form a plurality of first unit electrode sheets A1; a second slitting step (S50) in which, after the first slitting step (S30), the first unit electrode sheets A1 are secondary-cut to form a plurality of second unit electrode sheets A2; and a rewinding step (S60) in which the second unit electrode sheets A2 are unwound after the second slitting step (S50). In this case, the unwinding step (S10), the first slitting step (S30), the second slitting step (S50), and the rewinding step (S60) may be performed continuously.

[0080] Here, the unwinding step (S10) is the step of unwinding the electrode sheet A0 on which the electrode active material has been coated and dried, and this can be carried out in various ways.

[0081] First, the unwinding step (S10) is the step of unwinding the electrode sheet A0 on which the electrode active material has been applied and dried, and can be carried out in various ways. In this case, it is preferable that the electrode sheet A0 on which the electrode active material has been applied and dried be understood in this industry as a coated electrode sheet A0 on which the coating process has been completed.

[0082] The unwinding step (S10) may be performed by unwinding the electrode sheet A0 using the unwinder unit 100, and a detailed explanation of the unwinder unit 100 can be replaced with the content described above.

[0083] On the other hand, after the unwinding step (S10), a first slitting step (S30) may be performed to cut the electrode sheet A0 in the first place.

[0084] Here, the first slitting step (S30) is a step in which the electrode sheet A0 is primary cut to form a plurality of first unit electrode sheets A1, and this can be carried out in various ways.

[0085] Specifically, the first slitting step (S30) may involve cutting the electrode sheet A0 in the direction of transport of the electrode sheet A0 (reference Z direction in Figure 2) to form a plurality of first unit electrode sheets A1. Here, the width of the first unit electrode sheet A1 may be set in various ways.

[0086] The first slitting step (S30) may involve cutting the electrode sheet A0 with the first slitting unit 200 described above. Here, more specific details regarding the first slitting unit 200 may be replaced with the details described above.

[0087] After the first slitting step (S30) is performed, a second slitting step (S50) may be performed to perform secondary cutting of the first unit electrode sheet A1.

[0088] The second slitting step (S50) is a step in which, after the first slitting step (S30), the first unit electrode sheet A1 is secondary cut to form a plurality of second unit electrode sheets A2, and this step can be carried out in various ways.

[0089] Here, the second slitting step (S50) is a step in which the first unit electrode sheet A1 is primary cut to form a plurality of second unit electrode sheets A2, and this can be carried out in various ways.

[0090] Specifically, in the second slitting step (S50), the first unit electrode sheet A1 may be cut in the direction of transport of the first unit electrode sheet A1 (reference X direction in Figure 2) to form a plurality of second unit electrode sheets A2. Here, the width of the second unit electrode sheet A2 may be set in various ways.

[0091] In the second slitting step (S50), the first unit electrode sheet A1 may be cut by the second slitting unit 300 described above. Here, more specific details regarding the second slitting unit 300 may be replaced with the details described above.

[0092] After the second slitting step (S50) is performed, a rewinding step (S60) may be performed in which the second unit electrode sheet A2 is wound up.

[0093] Here, the rewinding step (S60) is the step of winding the second unit electrode sheet A2 after the second slitting step (S50), and may be carried out in various ways. Specifically, the rewinding step (S60) may be carried out by winding the second unit electrode sheet A2 with the rewinder unit 400, and here, the specific description of the rewinder unit 400 may be replaced with the content described above.

[0094] On the other hand, the present invention may further include a first position correction step (S20) for correcting the position of the electrode sheet A0 between the unwinding step (S10) and the first slitting step (S30).

[0095] Specifically, the first position correction step (S20) is a step in which the position information of the electrode sheet A0 is sensed via the first position correction unit 500 and the position of the electrode sheet A0 is corrected based on the position information of the electrode sheet A0, and this can be carried out in various ways. Here, a specific explanation of the first position correction unit 500 can be replaced with the content described above.

[0096] Furthermore, the present invention may further include a second position correction step (S40) for correcting the position of the first unit electrode sheet A1 between the first slitting step (S30) and the second slitting step (S50).

[0097] Specifically, the second position correction step (S40) is a step in which the position information of the first unit electrode sheet A1 is sensed via the second position correction unit 600, and the position of the first unit electrode sheet A1 is corrected based on the position information of the first unit electrode sheet A1, and this can be carried out in various ways. Here, a specific explanation of the second position correction unit 600 may be replaced with the content described above.

[0098] Although the present invention has been described above, even if limited embodiments and drawings have been provided, the present invention is not limited thereto, and various implementations are possible by persons with ordinary skill in the art to which the present invention pertains, within the equivalent scope of the technical concept of the present invention and the claims described below. [Explanation of Symbols]

[0099] 10 Roll support section 100 Unwinder Section 110 Main Unit 120 Unwinder Roller 200 First slitting section 300 Second Slitting Section 400 Rewinder Section 410 Main Unit 420 Rewinder Roller 500 1st position correction section 510 Main Unit 520 1st position sensing section 530 1st position adjustment section 600 2nd position correction section 610 Main Unit 620 2nd position sensing section 630 Second position adjustment section 700 Frame section 700a Input Hole 710 Bottom 720 Column section 730 Wall section 740 Lid S10 Unwinding Stage S20 First position correction stage S30 First slitting stage S40 Second position correction stage S50 Second slitting stage S60 Rewinding Stage A0 Electrode Sheet A1 First unit electrode sheet A2 Second Unit Electrode Sheet

Claims

1. An unwinder section for unwinding an electrode sheet coated and dried with electrode active material, The electrode sheet is supplied from the unwinder section and the electrode sheet is subjected to primary cutting to form a plurality of first unit electrode sheets by at least one first slitting section, A first unit electrode sheet is supplied from the first slitting section, and the first unit electrode sheet is secondary-cut to form a plurality of second unit electrode sheets, and at least one second slitting section, At least one rewinder section that receives and winds the second unit electrode sheet from the second slitting section, It further includes a frame section in which a slitting space is provided inside, The first slitting section and the second slitting section are installed on the frame section, The aforementioned frame portion is The bottom and, A pair of columnar portions extending upward from the bottom, A wall portion connected to the side surface of the pair of column portions, The lid portion is attached to the upper surface of the pair of columnar portions and has an insertion hole formed therein through which the electrode sheet is inserted into the slitting space, Multiple first unit electrode sheets branch out and move from the first slitting portion toward the pair of column portions, The rewinder section is provided in multiple units and is fixedly installed on the pair of column sections so as to face each other. The first slitting section and the second slitting section do not include a rewinder for winding the first unit electrode sheet, nor an unwinder for unwinding the first unit electrode sheet from the rewinder. Secondary battery manufacturing equipment.

2. Provided on the movement path of the electrode sheet, The secondary battery manufacturing apparatus according to claim 1, further comprising at least one first position correction unit that senses the position of the electrode sheet and corrects the position of the electrode sheet.

3. The secondary battery manufacturing apparatus according to claim 2, wherein the first position correction unit is attached to the frame portion.

4. The first position correction unit is, A first position sensing unit that senses the position of the electrode sheet, The secondary battery manufacturing apparatus according to claim 2, further comprising: a first position adjustment unit that adjusts the position of the electrode sheet based on the position information of the electrode sheet obtained from the first position sensing unit.

5. The secondary battery manufacturing apparatus according to claim 4, wherein the first position sensing unit includes an LPC sensor.

6. The secondary battery manufacturing apparatus according to claim 4, wherein the first position adjustment unit includes a pivot roller.

7. Provided between the first slitting portion and the second slitting portion, The secondary battery manufacturing apparatus according to any one of claims 1 to 2, further comprising at least one second position correction unit that senses the position of the first unit electrode sheet and corrects the position of the first unit electrode sheet.

8. The secondary battery manufacturing apparatus according to claim 7, wherein the second position correction unit is provided in a manner corresponding to the number of first unit electrode sheets formed by cutting from the first slitting unit.

9. The second position correction unit is, A second position sensing unit that senses the position of the first unit electrode sheet, The secondary battery manufacturing apparatus according to claim 7, further comprising: a second position adjustment unit that adjusts the position of the first unit electrode sheet based on position information of the first unit electrode sheet obtained from the second position sensing unit.

10. The secondary battery manufacturing apparatus according to claim 9, wherein the second position sensing unit includes an LPC sensor.

11. The secondary battery manufacturing apparatus according to claim 9, wherein the second position adjustment unit includes a pivot roller.

12. The secondary battery manufacturing apparatus according to claim 1, wherein the first slitting section and the second slitting section are fixedly installed on the wall.

13. An unwinding step in which the electrode sheet coated and dried with the electrode active material is unwound, After the unwinding step, a first slitting step is performed in which the electrode sheet is primary cut to form a plurality of first unit electrode sheets. A second slitting step is performed after the first slitting step, in which the first unit electrode sheet is secondarily cut to form a plurality of second unit electrode sheets. The second slitting step is followed by a rewinding step of winding up the second unit electrode sheet, The unwinding step, the first slitting step, the second slitting step, and the rewinding step are performed in succession. The first slitting step and the second slitting step do not include a rewinding step in which the first unit electrode sheet is wound up, and an unwinding step in which the first unit electrode sheet wound up in the rewinding step is unwound. A method for manufacturing a secondary battery using the secondary battery manufacturing apparatus described in claim 1.

14. Between the unwinding step and the first slitting step, The method for manufacturing a secondary battery according to claim 13, further comprising a first position correction step of sensing the position of the electrode sheet and correcting the position of the electrode sheet.

15. Between the first slitting step and the second slitting step, A method for manufacturing a secondary battery according to any one of claims 13 to 14, further comprising a second position correction step of sensing the position of the first unit electrode sheet and correcting the position of the first unit electrode sheet.

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