Battery cell, manufacturing device thereof, and manufacturing method thereof

Abstract

A battery cell manufacturing apparatus according to an embodiment of the present invention includes an electrode reel from which an electrode sheet on which a plurality of electrodes are formed is unwound, a separation membrane reel from which a separation membrane sheet is unwound which is folded when the electrode is placed thereon to cover the electrode and be laminated with the electrode, a table on which the electrode and the separation membrane sheet are placed, a pair of separation membrane guides which guide the folding direction of the separation membrane sheet, and a pair of upper nozzles which apply adhesive to at least a portion of the separation membrane sheet which passes between the pair of separation membrane guides.

Description

[Technical field]

[0001] Cross-references to related applications (etc.) This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0056556 dated May 9, 2022, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery cell, a manufacturing apparatus and a manufacturing method thereof, and more particularly to a battery cell in which electrodes and a separator sheet are stacked in a Z-folding type, and in which the electrodes can be prevented from coming off from their normal positions, and a manufacturing apparatus and a manufacturing method thereof. [Background technology]

[0003] Generally, types of secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, lithium-ion polymer batteries, etc. These secondary batteries are used not only in small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs (registered trademark), portable game devices, power tools, and E-bikes, but also in large products that require high output such as electric vehicles and hybrid vehicles, and in power storage devices and backup power storage devices that store surplus generated power and new renewable energy.

[0004] To manufacture such a secondary battery, an electrode active material slurry is first applied to a positive electrode current collector and a negative electrode current collector to manufacture a positive electrode and a negative electrode, which are then stacked on both sides of a separator to form an electrode assembly of a predetermined shape, and the electrode assembly is then placed in a battery case, an electrolyte is injected, and the battery case is sealed.

[0005] Electrode assemblies are classified into various types. For example, there are a simple stack type in which positive electrodes, separators, and negative electrodes are alternately stacked without manufacturing unit cells, a lamination and stack type (L&S) in which unit cells are first manufactured using positive electrodes, separators, and negative electrodes, and then stacked, a stack and folding type (S&F) in which a plurality of unit cells are attached at a distance to one side of a separator sheet having a long length, and the separator sheet is repeatedly folded from one end in the same direction, and a Z-folding type in which a plurality of electrodes or unit cells are alternately attached to one side and the other side of a separator sheet having a long length, and the separator sheet is folded from one end in a specific direction and then folded in the opposite direction. Among these, the Z-folding type has recently been widely used due to its high degree of alignment and electrolyte impregnation.

[0006] However, in the past, since a separate lamination process was not performed after stacking the electrodes and the separator sheet in such a Z-folding type, the electrodes and the separator sheet were not adhered to each other, and the electrodes were separated from their normal positions. To solve this problem, a separate lamination process was performed after stacking the electrodes and the separator sheet, but since the total thickness of the laminate in which the electrodes and the separator sheet are stacked is thick, there was a problem that heat was not transferred to the inside of the laminate, and the adhesive strength was reduced. In addition, there was a problem that the electrodes were separated from their normal positions during the process of transporting the laminate to perform this separate lamination process. This problem was more serious when the adhesive strength of the separator sheet itself was low depending on the material of the separator sheet.

[0007] For this reason, there is a need to develop a battery cell including a Z-folding type electrode assembly that prevents the electrodes from coming out of the correct position and improves battery cell performance, as well as a manufacturing apparatus and method thereof. Summary of the Invention [Problem to be solved by the invention]

[0008] The problem to be solved by the present invention is to provide a battery cell in which electrodes and a separator sheet are stacked in a Z-folding type, in which the electrodes can be prevented from coming off from their normal positions, and a manufacturing apparatus and method thereof.

[0009] The problems to be solved by the present invention are not limited to the problems described above, and problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the present invention pertains from this specification and the accompanying drawings. [Means for solving the problem]

[0010] A battery cell manufacturing apparatus according to an embodiment of the present invention may include an electrode reel from which an electrode sheet on which a plurality of electrodes are formed is unwound, a separation membrane reel from which a separation membrane sheet is unwound when the electrode is placed thereon, which is folded to cover the electrode and be laminated with the electrode, a table on which the electrode and the separation membrane sheet are placed, a pair of separation membrane guides that guide the folding direction of the separation membrane sheet, and a pair of upper nozzles that apply adhesive to at least a portion of the separation membrane sheet that passes between the pair of separation membrane guides.

[0011] Of the pair of separation membrane guides, a first separation membrane guide that guides the separation membrane sheet to which the adhesive is applied may include at least one recess, and the recess may be provided at a position corresponding to the adhesive applied to the separation membrane sheet.

[0012] The adhesive may be applied in a dotted or linear pattern along the length of the separation membrane sheet.

[0013] The pair of upper nozzles can rotate to apply adhesive to at least a portion of the electrode placed on the table, and the pair of separation membrane guides and the pair of upper nozzles can move back and forth in a straight line left and right based on the table, and the table may be fixed.

[0014] The electrode reels may include a first electrode reel from which a first electrode sheet on which a plurality of first electrodes are formed is unwound, and a second electrode reel from which a second electrode sheet on which a plurality of second electrodes are formed is unwound.

[0015] The pair of upper nozzles may include a first upper nozzle and a second upper nozzle, the first upper nozzle applying the adhesive to the separation membrane sheet passing over the first electrode or the pair of separation membrane guides, and the second upper nozzle applying the adhesive to the separation membrane sheet passing over the second electrode or the pair of separation membrane guides.

[0016] The first upper nozzle and the second upper nozzle may be disposed on both sides of the pair of separation membrane guides.

[0017] The first electrode may be placed on a first region of the separation membrane sheet, and the second electrode may be placed on a second region of the separation membrane sheet.

[0018] When the first electrode is placed on a first region of the separation membrane sheet, the first upper nozzle may move linearly onto the first electrode, and when the second electrode is placed on a second region of the separation membrane sheet, the second upper nozzle may move linearly onto the second electrode.

[0019] When the first upper nozzle applies the adhesive to at least a portion of the upper part of the first electrode, the first separation membrane guide can move linearly in a direction in which the separation membrane sheet covers the first electrode, and when the second upper nozzle applies the adhesive to at least a portion of the upper part of the second electrode, the first separation membrane guide can move linearly in a direction in which the separation membrane sheet covers the second electrode.

[0020] The adhesive may include a lower nozzle for applying the adhesive to a lower portion of the first electrode and a lower portion of the second electrode, respectively.

[0021] The substrate may further include a first header that adsorbs and places the first electrode in the first region, and a second header that adsorbs and places the second electrode in the second region.

[0022] When the first electrode is adsorbed to the first header, the lower nozzle may apply the adhesive to a lower portion of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle may apply the adhesive to a lower portion of the second electrode.

[0023] The apparatus may further include a first transport device that transports the first electrode toward the table, and a second transport device that transports the second electrode toward the table.

[0024] The first transfer device may include a first groove open toward the first electrode, and the lower nozzle may apply the adhesive to a lower portion of the first electrode through the first groove, and the second transfer device may include a second groove open toward the second electrode, and the lower nozzle may apply the adhesive to a lower portion of the second electrode through the second groove.

[0025] The electrode reels include a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is wound, and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is wound, the table rotates and reciprocates between the first electrode reel and the second electrode reel, and the pair of separation membrane guides and the pair of upper nozzles may linearly reciprocate left and right based on the table.

[0026] The first electrode may be placed on a first region of the separation membrane sheet, and the second electrode may be placed on a second region of the separation membrane sheet.

[0027] The pair of upper nozzles may include a first upper nozzle and a second upper nozzle, the first upper nozzle applying the adhesive to at least a portion of a second region of the separation membrane sheet passing between the pair of separation membrane guides, and the second upper nozzle applying the adhesive to at least a portion of a first region of the separation membrane sheet passing between the pair of separation membrane guides.

[0028] When each of the pair of upper nozzles applies adhesive onto the separation membrane sheet, the outlet of the first upper nozzle or the outlet of the second upper nozzle may rotate in a direction adjacent to the separation membrane sheet.

[0029] The first upper nozzle and the second upper nozzle are disposed on both sides of the pair of separation membrane guides.

[0030] The first electrode is placed on the first region of the separation membrane sheet, and the first upper nozzle moves linearly away from the table on the second region of the separation membrane sheet, and the second electrode is placed on the second region of the separation membrane sheet, and the second upper nozzle moves linearly away from the table on the first region of the separation membrane sheet.

[0031] The first upper nozzle applies the adhesive to at least a portion of the second region of the separation membrane sheet, while the pair of separation membrane guides move linearly in a direction toward the second electrode reel, and the second upper nozzle applies the adhesive to at least a portion of the first region of the separation membrane sheet, while the pair of separation membrane guides move linearly in a direction toward the first electrode reel.

[0032] When adhesive application by the first upper nozzle is completed, the pair of separation membrane guides can move linearly in a direction in which the second region of the separation membrane sheet where the adhesive is applied covers the first electrode, and when adhesive application by the second upper nozzle is completed, the pair of separation membrane guides can move linearly in a direction in which the first region of the separation membrane sheet where the adhesive is applied covers the second electrode.

[0033] The adhesive may include a lower nozzle for applying the adhesive to a lower portion of the first electrode and a lower portion of the second electrode, respectively.

[0034] The apparatus may further include a first header that adsorbs the first electrode and places it in the first region, and a second header that adsorbs the second electrode and places it in the second region, wherein the first header and the second header rotate back and forth in a direction in which they are positioned above the table.

[0035] When the first electrode is adsorbed to the first header, the lower nozzle may apply the adhesive to a lower portion of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle may apply the adhesive to a lower portion of the second electrode.

[0036] The apparatus may further include a first transport device that transports the first electrode toward the table, and a second transport device that transports the second electrode toward the table.

[0037] The first transfer device may include a first groove open toward the first electrode, and the lower nozzle may apply the adhesive to a lower portion of the first electrode through the first groove, and the second transfer device may include a second groove open toward the second electrode, and the lower nozzle may apply the adhesive to a lower portion of the second electrode through the second groove.

[0038] The pair of upper nozzles can rotate to apply adhesive to at least a portion of the electrode placed on the table, and may include a pair of pressure rollers that pressurize the separation membrane sheet guided by the pair of separation membrane guides.

[0039] The pressure roller may include at least one recess on a surface thereof, and the recess may be provided at a position corresponding to an adhesive applied to the separation membrane sheet.

[0040] The at least one pressure roller may be located between the pair of separation membrane guides and the table.

[0041] The at least one pressure roller may be located between the pair of separation membrane guides.

[0042] The electrode reels may include a first electrode reel from which a first electrode sheet on which a plurality of first electrodes are formed is unwound, and a second electrode reel from which a second electrode sheet on which a plurality of second electrodes are formed is unwound.

[0043] The apparatus may further include a first transport device that transports the first electrode toward the table, and a second transport device that transports the second electrode toward the table.

[0044] the pair of top nozzles includes a first top nozzle and a second top nozzle, The pair of upper nozzles may each apply an adhesive to the separation membrane sheet or the electrodes positioned on the table.

[0045] The first upper nozzle and the second upper nozzle may be disposed on both sides of the separation membrane guide.

[0046] The at least one pressure roller may include a first pressure roller and a second pressure roller, the first pressure roller being positioned between the first upper nozzle and the separation membrane guide, and the second pressure roller being positioned between the second upper nozzle and the separation membrane guide.

[0047] The first electrode may be placed on a first region of the separation membrane sheet, and the second electrode may be placed on a second region of the separation membrane sheet.

[0048] The substrate may further include a first header that adsorbs and places the first electrode in the first region, and a second header that adsorbs and places the second electrode in the second region.

[0049] The pair of separation membrane guides, the pair of upper nozzles, and the at least one pressure roller may be fixed, and the table may perform linear reciprocating motion toward the first transfer device and the second transfer device.

[0050] The table may be fixed, and the pair of separation membrane guides, the pair of upper nozzles, and the at least one pressure roller may linearly reciprocate toward the first transfer device and the second transfer device.

[0051] The apparatus may further include a moving box that accommodates the pair of separation membrane guides and the pair of upper nozzles therein.

[0052] In addition, a battery cell manufacturing method according to an embodiment of the present invention may include the steps of cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; a first upper nozzle applying adhesive between a pair of separation membrane guides to a first region of the separation membrane sheet unwound from a separation membrane reel, and the separation membrane sheet being placed on a table along the separation membrane guides; placing the first electrode on the first region of the separation membrane sheet; the first upper nozzle applying adhesive to an upper portion of the first electrode; and folding the separation membrane sheet in a folding direction guided by the separation membrane guides, so that the second region of the separation membrane sheet covers the first electrode.

[0053] The method may further include applying an adhesive to a lower portion of the first electrode using a lower nozzle before placing the first electrode on the first region of the separator sheet.

[0054] After covering the upper part of the first electrode, the method may further include cutting the second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes, applying adhesive to lower parts of the second electrodes with a lower nozzle, placing the second electrodes on a second region of the separation membrane sheet, applying adhesive to upper parts of the second electrodes with a second upper nozzle, and folding the separation membrane sheet in a folding direction guided by the separation membrane guide, so that the first region of the separation membrane sheet covers the second electrodes.

[0055] The table may be fixed, and the pair of separation membrane guides, the first upper nozzle, and the second upper nozzle may linearly reciprocate with respect to the table.

[0056] In addition, a battery cell manufacturing method according to an embodiment of the present invention may include the steps of cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; placing the separation membrane sheet unwound from a separation membrane reel on a table along a pair of separation membrane guides; applying adhesive to a lower part of the first electrode with a lower nozzle; placing the first electrode in a first region of the separation membrane sheet; applying adhesive to at least a portion of a second region of the separation membrane sheet with a first upper nozzle between the pair of separation membrane guides; and folding the separation membrane sheet in a folding direction guided by the separation membrane guides, so that the second region of the separation membrane sheet to which the adhesive has been applied covers the first electrode.

[0057] After the step of covering the upper part of the first electrode, the method may further include a step of cutting the second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes, a step of applying an adhesive to the lower part of the second electrode with a lower nozzle, a step of placing the second electrode on the second region of the separation membrane sheet, a step of applying an adhesive to at least a part of the first region of the separation membrane sheet between the pair of separation membrane guides with a second upper nozzle, and a step of folding the separation membrane sheet in a folding direction guided by the separation membrane guides, so that the first region of the separation membrane sheet to which the adhesive has been applied covers the second electrode.

[0058] The table rotates and reciprocates between the first electrode reel and the second electrode reel, and the separation membrane guide and the pair of upper nozzles (first upper nozzle and second upper nozzle) can linearly reciprocate left and right based on the table.

[0059] In the step of applying an adhesive by the first upper nozzle and the step of applying an adhesive by the second upper nozzle, the outlet of the first upper nozzle or the outlet of the second upper nozzle may rotate in a direction adjacent to the separation membrane sheet.

[0060] In addition, a battery cell manufacturing method according to an embodiment of the present invention may include the steps of cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; a first upper nozzle applying adhesive to a first region of the separation membrane sheet unwound from a separation membrane reel between a pair of separation membrane guides, and the separation membrane sheet being placed on a table along the separation membrane guides; placing the first electrode on the first region of the separation membrane sheet; a first upper nozzle applying adhesive to an upper portion of the first electrode; and folding the separation membrane sheet in a folding direction guided by the separation membrane guide, so that a second region of the separation membrane sheet covers the first electrode, and a first pressure roller may press the separation membrane sheet guided by the separation membrane guide.

[0061] After the step of covering the upper part of the first electrode, the method may further include a step of cutting the second electrode sheet unwound from the second electrode reel to form a plurality of second electrodes, a step of applying adhesive to the second region of the separation membrane sheet between the pair of separation membrane guides with a second upper nozzle, a step of placing the second electrode on the second region of the separation membrane sheet, a step of applying adhesive to the upper part of the second electrode with the second upper nozzle, and a step of folding the separation membrane sheet in a folding direction guided by the separation membrane guide, so that the first region of the separation membrane sheet covers the second electrode, and a second pressure roller may press the separation membrane sheet guided by the separation membrane guide.

[0062] The separation membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller may be fixed, and the table may perform linear reciprocating motion toward the first transfer device and the second transfer device.

[0063] The table may be fixed, and the separation membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller may linearly reciprocate toward the first transfer device and the second transfer device.

[0064] Of the pair of separation membrane guides, a first separation membrane guide that guides the separation membrane sheet to which the adhesive is applied may include at least one recess, and the recess may be provided at a position corresponding to the adhesive applied to the separation membrane sheet.

[0065] The adhesive may be applied in a dotted or linear pattern along the length of the separation membrane sheet.

[0066] The pressure roller may include at least one recess on a surface thereof, and the recess may be provided at a position corresponding to an adhesive applied to the separation membrane sheet.

[0067] In addition, an electrode assembly manufactured by the battery cell manufacturing method according to an embodiment of the present invention, in which electrodes and separator sheets are alternately stacked, may include a first electrode and a second electrode, the separator sheet has a zigzag shape formed by folding at least two times, the separator sheet is folded with the first electrode fixed on a first region of the separator sheet, a second region of the separator sheet covers the first electrode, the separator sheet is folded with the second electrode fixed on the second region, the first region of the separator sheet covers the second electrode, and an adhesive layer is formed between the electrodes and the separator sheet.

[0068] The adhesive layer may include a first adhesive layer and a second adhesive layer, the first adhesive layer being located between the lower part of the electrode and the separator sheet, and the second adhesive layer being located between the upper part of the electrode and the separator sheet.

[0069] The first adhesive layer and the second adhesive layer may each be formed by applying an adhesive in the shape of a plurality of dots.

[0070] A battery cell including an electrode assembly according to an embodiment of the present invention may include a battery case that accommodates the electrode assembly together with an electrolyte, and the adhesive layer may be dissolved in the electrolyte. Effect of the Invention

[0071] According to the embodiment, the present invention provides a battery cell in which electrodes and separator sheets are stacked in a Z-folding type and adhesive is pre-applied to the upper and lower parts of the electrodes, and a manufacturing apparatus and method thereof, which can prevent the electrodes from coming off from the correct position.

[0072] In addition, since the adhesive is applied using a horizontal nozzle during the manufacturing process of the electrode assembly, the moving distance of the separator can be reduced, making the process more efficient and allowing the process time to be managed more accurately.

[0073] In addition, by stacking the electrodes and the separator in a zigzag pattern and then performing a pressing process before winding the separator, the winding quality can be improved and the rigidity of the battery cell can be increased.

[0074] The effects of the present invention are not limited to the effects described above, and effects not mentioned will be clearly understood by those having ordinary skill in the art to which the present invention pertains from this specification and the accompanying drawings. [Brief description of the drawings]

[0075] [Figure 1] FIG. 1 is a flowchart of a battery cell manufacturing method according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing a state in which adhesive is applied to a first region of a separator sheet in a battery cell manufacturing apparatus according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic diagram showing how a first electrode is fixed to a first region of a separator sheet in the battery cell manufacturing apparatus of FIG. [Figure 4] FIG. 4 is a schematic diagram showing how adhesive is applied to the lower part of the first electrode in the battery cell manufacturing apparatus of FIG. [Diagram 5] FIG. 5 is a schematic diagram showing a modification of the manner in which adhesive is applied to the lower part of the first electrode in FIG. [Figure 6] FIG. 6 is a schematic diagram showing how the first upper nozzle applies adhesive to the upper part of the first electrode while moving linearly in the battery cell manufacturing apparatus of FIG. [Figure 7] FIG. 7 is a schematic diagram showing how the separator guide moves linearly in the battery cell manufacturing apparatus of FIG. 2 and how the second electrode is fixed onto the second region of the separator sheet. [Figure 8] FIG. 8 is a schematic diagram showing how the second upper nozzle applies adhesive to the upper part of the second electrode while moving linearly in the battery cell manufacturing apparatus of FIG. [Figure 9] FIG. 9 is a flowchart of a battery cell manufacturing method according to another embodiment of the present invention. [Figure 10]FIG. 10 is a schematic diagram showing a state in which a first electrode is attached to a first region of a separator sheet in a battery cell manufacturing apparatus according to another embodiment of the present invention. [Figure 11] FIG. 11 is a schematic diagram showing how adhesive is applied to the lower part of the first electrode in the battery cell manufacturing apparatus of FIG. [Figure 12] FIG. 12 is a schematic diagram showing a modification of the manner in which adhesive is applied to the lower part of the first electrode in FIG. [Figure 13] FIG. 13 is a schematic diagram showing how the table in the battery cell manufacturing apparatus of FIG. 10 rotates while the separation membrane guide and the first upper nozzle move linearly and the first upper nozzle rotates to apply adhesive to the second region. [Figure 14] FIG. 14 is a schematic diagram showing how the table in the battery cell manufacturing apparatus of FIG. 10 rotates while the separation membrane guide and the first upper nozzle move linearly and the first upper nozzle rotates to apply adhesive to the second region. [Figure 15] FIG. 15 is a schematic diagram illustrating how the separator guide moves linearly in the opposite direction in the battery cell manufacturing apparatus of FIG. 10 and the second region coated with adhesive covers the first electrode. [Figure 16] FIG. 16 is a schematic diagram showing how a second electrode is attached to a second region of a separator sheet in the battery cell manufacturing apparatus of FIG. [Figure 17] FIG. 17 is a flowchart of a battery cell manufacturing method according to another embodiment of the present invention. [Figure 18] FIG. 18 is a schematic diagram showing how adhesive is applied to a first region of a separator sheet while a table moves linearly in a battery cell manufacturing apparatus according to another embodiment of the present invention. [Figure 19] FIG. 19 is a schematic diagram showing how a first electrode is fixed to a first region of a separator sheet in the battery cell manufacturing apparatus of FIG. [Figure 20] FIG. 20 is a schematic diagram showing how adhesive is applied to the top of a first electrode while the table moves linearly in the battery cell manufacturing apparatus of FIG. [Figure 21]FIG. 21 is a schematic diagram showing how adhesive is applied to the second region of the separator membrane sheet while the table moves linearly in the battery cell manufacturing apparatus of FIG. [Figure 22] FIG. 22 is a schematic diagram showing how a second electrode is fixed to a second region of a separator sheet in the battery cell manufacturing apparatus of FIG. [Figure 23] FIG. 23 is a schematic diagram of a battery cell manufacturing apparatus that is a partial modification of the battery cell manufacturing apparatus of FIG. 18, showing how adhesive is applied to a first region of a separator membrane sheet while a first upper nozzle moves linearly. [Figure 24] FIG. 24 is a schematic diagram showing how a first electrode is fixed to a first region of a separator sheet in the battery cell manufacturing apparatus of FIG. [Diagram 25] FIG. 25 is a schematic diagram showing how adhesive is applied to the upper part of the first electrode while the first upper nozzle moves linearly in the battery cell manufacturing apparatus of FIG. [Figure 26] Figure 26 is a schematic diagram showing how adhesive is applied to the second region of the separator membrane sheet and a second electrode is fixed to the second region of the separator membrane sheet while the second upper nozzle moves linearly in the battery cell manufacturing apparatus of Figure 23. [Figure 27] FIG. 27 is a schematic diagram showing one embodiment of a lower separation membrane guide according to the present invention. [Figure 28] FIG. 28 is a schematic diagram showing an embodiment of a pressure roller according to the present invention. [Figure 29] FIG. 29 is a schematic diagram showing an embodiment of a pressurizing jig according to the present invention. [Diagram 30] FIG. 30 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention. [Diagram 31] FIG. 31 is an exploded perspective view of a battery cell according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0076] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention may, however, be embodied in various different forms and should not be construed as limited to the embodiments set forth herein.

[0077] In order to clearly describe the present invention, parts that are not relevant to the description will be omitted, and the same reference numerals will be used to refer to the same or similar components throughout the specification.

[0078] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited to those shown. In the drawings, thicknesses are enlarged to clearly show various layers and regions. In the drawings, thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0079] Furthermore, throughout the specification, when a part "comprises" a certain component, this does not mean excluding other components, but means that the part may further include other components, unless otherwise specified to the contrary.

[0080] In addition, since the top / bottom or upper / lower surfaces of a particular component may be determined differently depending on a certain direction, throughout this specification, "top" and "bottom" refer to two surfaces that face each other on the z-axis of the component, and "top" and "bottom" are defined as surfaces that are located in opposite directions on the z-axis of the component.

[0081] Also, throughout the specification, "on a plane" means when the part in question is viewed from above, and "on a cross section" means when the part in question is viewed from the side of a cross section cut vertically through the part.

[0082] Hereinafter, a battery cell manufacturing method and apparatus according to an embodiment of the present invention will be described.

[0083] Fig. 1 is a flow chart of a battery cell manufacturing method according to an embodiment of the present invention. Fig. 2 is a schematic diagram showing a state in which an adhesive is applied to a first region of a separator membrane sheet in a battery cell manufacturing apparatus according to an embodiment of the present invention. Fig. 3 is a schematic diagram showing a state in which a first electrode is fixed to the first region of a separator membrane sheet in the battery cell manufacturing apparatus of Fig. 2.

[0084] 1, 2, and 3, a method for manufacturing a battery cell according to one embodiment of the present invention includes a step of cutting electrode sheets (first electrode sheet 1111, second electrode sheet 1121) to form an electrode 11 (S101), a step of applying adhesive to a separator sheet 122 and placing the separator sheet 122 with the adhesive applied on a table 16 (S102), a step of selectively applying adhesive to the lower part of the electrode 11 (S103), a step of placing the electrode 11 on the separator sheet 122 (S104), a step of applying adhesive to the upper part of the electrode 11 (S105), and a step of folding the separator sheet 122 to cover the electrode 11 (S106).

[0085] As a result, in the battery cell manufacturing method according to this embodiment, when the electrode 11 and the separator sheet 122 are stacked in a Z-folding type, adhesive is applied to the upper and lower parts of the electrode 11, preventing the electrode 11 from coming off from the correct position.

[0086] Each step shown in the flowchart of FIG. 1 will now be described in detail with reference to FIGS.

[0087] The battery cell manufacturing apparatus 1 in Figure 2 includes electrode reels (first electrode reel 111, second electrode reel 112) from which an electrode sheet on which multiple electrodes 11 are formed is unwound, a separation membrane reel 121 from which a separation membrane sheet 122 is unwound which is folded when the electrode 11 is placed on it, covers the electrode 11, and is laminated with the electrode 11, a table 16 on which the electrode 11 and the separation membrane sheet 122 are placed, a separation membrane guide 125 that guides the folding direction of the separation membrane sheet 122, and a pair of upper nozzles 17 that apply adhesive to at least a portion of the upper part of the electrode 11 placed on the table 16.

[0088] The electrode reels 111, 112 may include a first electrode reel 111 from which a first electrode sheet 1111 on which a plurality of first electrodes 1112 are formed is unwound, and a second electrode reel 112 from which a second electrode sheet 1121 on which a plurality of second electrodes 1122 are formed is unwound.

[0089] The electrode reels (first electrode reel 111, second electrode reel 112) are reels around which the electrode sheets (first electrode sheet 1111, second electrode sheet 1121) are wound, and the electrode sheets (first electrode sheet 1111, second electrode sheet 1121) are unwound from the electrode reels (first electrode reel 111, second electrode reel 112). Then, such electrode sheets (first electrode sheet 1111, second electrode sheet 1121) are cut to form the electrodes 11. More specifically, according to this embodiment, the first electrode reel 111 is a reel around which the first electrode sheet 1111 is wound, and the first electrode sheet 1111 is unwound from the first electrode reel 111. Moreover, the second electrode reel 112 is a reel around which the second electrode sheet 1121 is wound, and the second electrode sheet 1121 is unwound from the second electrode reel 112.

[0090] Here, the electrode sheets (first electrode sheet 1111, second electrode sheet 1121) may be manufactured by applying a slurry of an electrode active material, a conductive agent, and a binder onto an electrode current collector, and then drying and pressing the slurry. However, the manufacturing method of the electrode sheets (first electrode sheet 1111, second electrode sheet 1121) is not limited thereto, and any method generally used in the technical field to manufacture electrode sheets (first electrode sheet 1111, second electrode sheet 1121) is included in this embodiment.

[0091] More specifically, the first electrode sheet 1111 and the second electrode sheet 1121 may contain electrode active materials having different polarities. That is, the first electrode 1112 and the second electrode 1122 may be electrodes 11 having different polarities. As an example, if the first electrode 1112 is a positive electrode, the second electrode 1122 may be a negative electrode. As another example, if the first electrode 1112 is a negative electrode, the second electrode 1122 may be a positive electrode.

[0092] The separation membrane reel 121 is a reel on which the separation membrane sheet 122 is wound, and the separation membrane sheet 122 is unwound from the separation membrane reel 121. Thereafter, the separation membrane sheet 122 is laminated with the electrode 11 formed by cutting the electrode sheets (first electrode sheet 1111, second electrode sheet 1121). Here, the electrode 11 and the separation membrane sheet 122 are laminated in a Z-folding type. More specifically, in this embodiment, when the first electrode 1112 is placed on the separation membrane sheet 122, one side is folded to cover the first electrode 1112, and when the second electrode 1122 is placed, the other side is folded to cover the second electrode 1122.

[0093] The electrode 11 and the separation membrane sheet 122 may be placed and stacked on the upper surface of the table 16. More preferably, the upper surface of the table 16 is formed to be substantially flat, so that the electrode 11 and the separation membrane sheet 122 can be stably stacked.

[0094] The table 16 may be disposed between the first electrode reel 111 and the second electrode reel 112. More specifically, the table 16 may be fixed between the first electrode reel 111 and the second electrode reel 112.

[0095] This allows the electrodes 11 and the separator sheets 122 to be stacked on the table 16 while the table 16 is fixed, thereby further improving the degree of alignment of the electrodes 11 and the separator sheets 122.

[0096] The battery cell manufacturing apparatus 1 according to this embodiment may further include a first transfer device 141 that transfers the first electrode 1112 toward the table 16, and a second transfer device 142 that transfers the second electrode 1122 toward the table 16. Here, the first transfer device 141 can transfer the first electrode 1112 formed by cutting the first electrode sheet 1111 unwound from the first electrode reel 111, toward the table 16. In addition, the second transfer device 142 can transfer the second electrode 1122 formed by cutting the second electrode sheet 1121 unwound from the second electrode reel 112, toward the table 16.

[0097] As a result, in this embodiment, the first electrode 1112 and the second electrode 1122 can be transported to both sides of the table 16 by the first transport device 141 and the second transport device 142, respectively, making it easy to alternately stack the first electrode 1112 and the second electrode 1122 on the separation membrane sheet 122.

[0098] The battery cell manufacturing apparatus 1 according to this embodiment may include headers (first header 151, second header 152) that adsorb the electrode 11 and place it on the separation membrane sheet 122. More specifically, the headers (first header 151, second header 152) may further include the first header 151 that adsorbs the first electrode 1112 and places it on the separation membrane sheet 122, and the second header 152 that adsorbs the second electrode 1122 and places it on the separation membrane sheet 122. Here, the first header 151 and the second header 152 may each move linearly back and forth toward the table 16.

[0099] More specifically, the first header 151 can adsorb the first electrode 1112 transferred from the first transfer device 141 toward the table 16, and the second header 152 can adsorb the second electrode 1122 transferred from the second transfer device 142 toward the table 16. In addition, the first header 151 and the second header 152 can move linearly toward the table 16.

[0100] As a result, in this embodiment, the first header 151 and the second header 152 may move the electrode 11 above the table 16, allowing the electrode 11 to be stably placed on the separation membrane sheet 122.

[0101] Furthermore, the headers (first header 151, second header 152) can measure the presence or absence of misalignment of the first electrode 1112 or the second electrode 1122 for each first electrode 1112 or second electrode 1122, correct the position as necessary, and accurately place the electrodes 11 and the separation membrane sheet 122 positioned on the table 16 at the desired position. This can further improve the alignment between the electrodes 11 and the separation membrane sheet 122 aligned and stacked on the table 16 in this embodiment.

[0102] 2, a battery cell manufacturing apparatus 1 according to an embodiment of the present invention can apply adhesive using a pair of upper nozzles 17, which for convenience are referred to as "horizontal nozzles". More specifically, each of the pair of upper nozzles 17 can rotate. By each of the pair of upper nozzles 17 rotating, each of the outlets can be directed toward the separator membrane sheet 122.

[0103] 2, the first upper nozzle 171 can rotate, for example, counterclockwise based on the moving direction of the separation membrane sheet 122. This allows the outlet of the first upper nozzle 171 to be directed toward the separation membrane sheet 122 passing between the upper and lower separation membrane guides 125a, 125b described below. In addition, the second upper nozzle 172 can rotate, for example, clockwise based on the moving direction of the separation membrane sheet 122. This allows the outlet of the second upper nozzle 172 to be directed toward the separation membrane sheet 122 passing between the upper and lower separation membrane guides 125a, 125b.

[0104] In this manner, adhesive may be applied to the separation membrane sheet 122 with the respective outlets of the first upper nozzle 171 and the second upper nozzle 172 directed toward the separation membrane sheet 122 passing between the upper and lower separation membrane guides 125a, 125b.

[0105] 2 shows a case where the first upper nozzle 171 and the second upper nozzle 172 are both rotated horizontally for convenience. However, the first upper nozzle 171 and the second upper nozzle 172 do not necessarily need to rotate at the same time, and various modifications and variations are possible, such as only the first upper nozzle 171 rotating or only the second upper nozzle 172 rotating. In other words, the first upper nozzle 171 and the second upper nozzle 172 can rotate separately or simultaneously depending on the process of applying adhesive to the separation membrane sheet 122 from the first upper nozzle 171 or the process of applying adhesive to the separation membrane sheet 122 from the second upper nozzle 172.

[0106] In addition, the present invention is not limited to the above-mentioned rotation angles of the first upper nozzle 171 and the second upper nozzle 172, and various modifications and variations are possible. In other words, it is sufficient that the adhesive is applied to the separation membrane sheet 122 with the outlets of the first upper nozzle 171 and the second upper nozzle 172 facing the separation membrane sheet 122.

[0107] 3, in the battery cell manufacturing apparatus 1 according to this embodiment, the electrode 11 may be placed on the separator sheet 122 with an adhesive applied to at least a portion of the lower surface of the electrode 11. More specifically, in this embodiment, the adhesive may be applied to at least a portion of the lower surface of the electrode 11 when the electrode 11 is positioned on the transfer devices (first transfer device 141, second transfer device 142), or the adhesive may be applied to at least a portion of the lower surface of the electrode 11 when the electrode 11 is adsorbed to the headers (first header 151, second header 152).

[0108] In some cases, since an adhesive layer (first adhesive layer 1710) is formed by applying an adhesive to the separation membrane sheet 122 in FIG. 2, the electrode 11 may be placed on the separation membrane sheet 122 without any adhesive being applied to the lower part of the electrode 11 in FIG. 3.

[0109] Fig. 4 is a schematic diagram showing how adhesive is applied to the lower part of a first electrode in battery cell manufacturing apparatus 1 according to one embodiment of the present invention. Fig. 5 is a schematic diagram showing a modified example of how adhesive is applied to the lower part of the first electrode in Fig. 4.

[0110] 4 and 5, the battery cell manufacturing apparatus 1 according to this embodiment may include a lower nozzle 173 that applies adhesive to at least a portion of the lower surface of the first electrode 1112. More specifically, the lower nozzle 173 can apply adhesive to at least a portion of the lower surface of the first electrode 1112. In this way, a first adhesive layer 1710 can be formed on the lower surface of the first electrode 1112.

[0111] For example, referring to FIG. 4, when the first electrode 1112 is attached to the first header 151, the lower nozzle 173 may apply adhesive to at least a portion of the lower surface of the first electrode.

[0112] As another example, the first conveying device 141a includes a first groove 141a' that is open toward the first electrode 1112, and the lower nozzle 173 may apply adhesive to at least a portion of the lower surface of the first electrode 1112 through the first groove 141a'. Here, the first conveying device 141a may be formed with at least one first groove 141a', and the plurality of first grooves 141a' may be spaced apart from each other. Also, as shown in FIG. 5, the first groove 141a' may extend along the width direction of the first electrode 1112, but is not limited thereto and may extend in various directions.

[0113] However, for ease of explanation, the first electrode 1112 is used as an example, and the second electrode 1122 can be described in the same manner as the second header 152 or the second transport device 142.

[0114] Here, it is preferable that the adhesive is uniformly applied to the lower part of the electrode 11. However, if the adhesive is applied to the entire surface of the lower part of the electrode 11, the amount of adhesive applied may be excessive. In such a case, the adhesive may flow to the outside of the separator sheet 122 and contaminate other parts, and when a secondary battery is manufactured, the function of producing electricity may not be smooth.

[0115] Therefore, in this embodiment, the adhesive is preferably applied in a spot application manner in which the adhesive is applied in a dot shape or in a line application manner in which the adhesive is applied in a linear shape to the lower part of the electrode 11. That is, the first adhesive layer 1710 is preferably formed in a spot pattern or a line pattern.

[0116] On the other hand, if the amount of adhesive applied is too small, the electrodes 11 may still not be fixed to the separator sheet 122 and may come off from their correct positions as the cell moves. Therefore, it is preferable that the intervals between the areas where the adhesive is applied are not too wide.

[0117] In addition, the adhesive may be applied to the surface of the electrode 11 in a minimum amount that ensures adhesion between the electrode 11 and the separator sheet 122. In contrast, if the adhesive is applied directly onto the separator sheet 122, there is a problem that the separator sheet 122 absorbs part of the adhesive, and a larger amount of adhesive must be applied to ensure adhesion between the electrode 11 and the separator sheet 122.

[0118] Meanwhile, the adhesive may be dissolved in the electrolyte. More specifically, when the first adhesive layer 1710 formed under the electrode 11 is immersed in the electrolyte, the adhesive contained in the first adhesive layer 1710 may be dissolved in the electrolyte. Here, dissolving the adhesive means that the adhesive is dissolved in the electrolyte. In other words, it means that the area of ​​the first adhesive layer 1710 formed under the electrode 11 is reduced or the first adhesive layer 1710 is completely removed, and no first adhesive layer 1710 remains under the electrode 11.

[0119] As an example, the adhesive may be an acrylate adhesive, and in this embodiment, the adhesive may be applied to the lower part of the electrode 11, so that the adhesive may be dissolved in the electrolyte contained in the final battery cell.

[0120] As a result, in this embodiment, the first adhesive layer 1710 fixes the electrode 11 to the separator sheet 122 during the manufacturing process and prevents it from coming off from the correct position. In addition, the first adhesive layer 1710 dissolves in the electrolyte contained in the final battery cell and does not interfere with the movement of lithium ions between the electrode and the separator, thereby further improving the performance of the battery cell.

[0121] FIG. 6 is a schematic diagram showing how the first upper nozzle applies adhesive to the upper part of the first electrode while moving linearly in the battery cell manufacturing apparatus of FIG.

[0122] 6, the pair of upper nozzles 17 apply adhesive to at least a portion of the upper surface of the electrode 11. More specifically, the pair of upper nozzles 17 includes a first upper nozzle 171 that applies adhesive to at least a portion of the upper surface of the first electrode 1112, and a second upper nozzle 172 that applies adhesive to at least a portion of the upper surface of the second electrode 1122.

[0123] The first upper nozzle 171 and the second upper nozzle 172 may be disposed on both sides of the separation membrane sheet 122. That is, the first upper nozzle 171 can apply an adhesive to at least a portion of the upper surface of the first electrode 1112 before the upper surface of the first electrode 1112 is covered by the separation membrane sheet 122 to form the second adhesive layer 1750. The second upper nozzle 172 can apply an adhesive to at least a portion of the upper surface of the second electrode 1122 before the upper surface of the second electrode 1122 is covered by the separation membrane sheet 122, as described later in relation to FIG.

[0124] In addition, the pair of upper nozzles 17 can move linearly back and forth to the left and right with respect to the table 16. That is, the pair of upper nozzles 17 can apply adhesive to at least a portion of the upper surface of the electrode 11 while moving linearly from one side of the table 16 to the other side or in the opposite direction.

[0125] The adhesive applied from the pair of upper nozzles 17 can be explained in the same manner as the adhesive applied from the lower nozzle 173 described above.

[0126] Here, the pair of upper nozzles 17 may simultaneously or individually reciprocate left and right with respect to the table 16. More preferably, the pair of upper nozzles 17 may simultaneously reciprocate left and right with respect to the table 16. As an example, when the first upper nozzle 171 applies adhesive from one side of the table 16 to the other side as shown in Fig. 6, the second upper nozzle 172 may apply adhesive from the other side of the table 16 to one side as described later in relation to Fig. 8.

[0127] As a result, in this embodiment, the process time of the adhesive application process by the pair of upper nozzles 17 is reduced, and the process efficiency can be further improved.

[0128] Fig. 7 is a schematic diagram showing how the separator guide moves linearly and the second electrode is fixed onto the second region of the separator membrane sheet in the battery cell manufacturing apparatus of Fig. 2. Before the second electrode is placed, an adhesive may be applied to the separator membrane sheet 122 with the outlet of the second upper nozzle 172 facing the separator membrane sheet 122, as described above with reference to Fig. 2.

[0129] Also, as described above in relation to Figure 3, the second electrode may be placed on the separation membrane sheet 122 with adhesive applied to at least a portion of the lower part of the second electrode, or the second electrode may be placed on the separation membrane sheet 122 with no adhesive applied to the lower part of the second electrode.

[0130] 6 and 7, in this embodiment, the folding direction of the separator sheet 122 may be guided by a separator guide 125. More specifically, the separator guide 125 may perform linear reciprocating motion to the left and right with respect to the table 16.

[0131] For example, the separation membrane guide 125 may have a form in which a pair of rolls are arranged horizontally, and the separation membrane sheet 122 may be inserted between the pair of rolls. However, the form of the separation membrane guide 125 is not limited thereto, and any form capable of controlling the folding direction of the separation membrane sheet 122 is included in this embodiment.

[0132] In addition, the separation membrane guide 125 may include an upper separation membrane guide 125a and a lower separation membrane guide 125b located above and below the pair of upper nozzles 17. However, the positions and the number of the upper separation membrane guide 125a and the lower separation membrane guide 125b are not limited thereto, and are included in this embodiment as long as they are located at positions and in numbers that can control the folding direction of the separation membrane sheet 122. The lower separation membrane guide 125b will be described in detail with reference to FIG. 27 described later.

[0133] Here, when the separation membrane guide 125 moves linearly back and forth toward the first transfer device 141 and the second transfer device 142 based on the table 16, the separation membrane sheet 122 is folded along the moving direction of the separation membrane guide 125 so that the separation membrane sheet 122 can cover the electrode 11.

[0134] As an example, referring to Figures 6 and 7, with the first electrode 1112 fixed on the first region 1221 of the separation membrane sheet 122, the separation membrane guide 125 moves linearly toward the first conveying device 141, so that the second region 1222 of the separation membrane sheet 122 covers the top of the first electrode 1112.

[0135] Here, the first region 1221 of the separation membrane sheet 122 refers to a region of the separation membrane sheet 122 where the first electrode 1112 is attached. In some cases, the first region 1221 refers to a region of the separation membrane sheet 122 where the first electrode 1112 is attached while covering the second electrode 1122. And the second region 1222 refers to a region of the separation membrane sheet 122 where the second electrode 1122 is attached while covering the first electrode 1112. In other words, the first electrode 1112 may be placed on the first region 1221 of the separation membrane sheet 122, and the second electrode 1122 may be placed on the second region 1222 of the separation membrane sheet 122.

[0136] In addition, the separation membrane guide 125 can reciprocate left and right together with the pair of upper nozzles 17 with respect to the table 16, or the separation membrane guide 125 and the pair of upper nozzles 17 can each reciprocate left and right.

[0137] 6 and 7, when the first upper nozzle 171 applies adhesive to at least a portion of the upper part of the first electrode 1112, the separation membrane guide 125 moves linearly in a direction in which the separation membrane sheet 122 covers the first electrode 1112. In addition, when the second upper nozzle 172 applies adhesive to at least a portion of the upper part of the second electrode 1122, as will be described later in relation to FIG.

[0138] Thus, the separation membrane guide 125 can be of a Z-folding type such that the separation membrane sheet 122 covers the upper and lower parts of the electrode 11 .

[0139] More preferably, the separation membrane guide 125 and the pair of upper nozzles 17 may simultaneously reciprocate left and right based on the table 16. For example, as shown in Figs. 6 and 7, when the first upper nozzle 171 applies adhesive from one side of the table 16 to the other side, the separation membrane guide 125 may also fold the separation membrane sheet 122 by moving linearly from one side of the table 16 to the other side.

[0140] As a result, the adhesive application process by the pair of upper nozzles 17 and the folding process of the separation membrane sheet 122 by the separation membrane guide 125 can be performed simultaneously, so that the process time can be reduced and the process efficiency can be further improved.

[0141] FIG. 8 is a schematic diagram showing how the second upper nozzle applies adhesive to the upper part of the second electrode while moving linearly in the battery cell manufacturing apparatus of FIG.

[0142] 3, 7 and 8, in the battery cell manufacturing apparatus 1 according to this embodiment, like the first electrode 1112, the second electrode 1122 can be attracted to the second header 152 and can move linearly back and forth. As an example, as shown in FIG. 7, in a state in which the second electrode 1122 is attracted to the second header 152, the second header 152 can move linearly to be positioned above the table 16. At this time, the second electrode 1122 can be placed on the second region 1222 of the separator sheet 122. Otherwise, the second electrode 1122 and the second header 152 can be described in the same manner as the first upper nozzle 171 described above.

[0143] Similarly to the first upper nozzle 171, the second upper nozzle 172 can perform a linear reciprocating motion with respect to the table 16. As an example, the second upper nozzle 172 can apply adhesive to at least a portion of an upper surface of the second electrode 1122 by moving from one side to the other side of the table 16. Otherwise, the second upper nozzle 172 can be described in the same manner as the first upper nozzle 171 described above.

[0144] Using such a battery cell manufacturing apparatus 1, a battery cell manufacturing method according to one embodiment of the present invention can be carried out as follows.

[0145] 1 and 2, when the first electrode sheet 1111 is unwound from the first electrode reel 111, the first cutter 131 cuts the first electrode sheet 1111 to form a plurality of first electrodes 1112 (S101).

[0146] Meanwhile, while the separation membrane sheet 122 is being unwound from the separation membrane reel 121, an adhesive is applied to the first region 1221 of the separation membrane sheet 122 to form a first adhesive layer 1710. At this time, the outlet of the first upper nozzle 171 applies the adhesive toward the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b and is placed on the upper surface of the table 16 (S102).

[0147] Also, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112 (S103). As an example, as shown in FIG. 4, the lower nozzle applies adhesive to the lower part of the first electrode 1112 while the first header 151 is adsorbing the first electrode 1112. As another example, as shown in FIG. 5, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112 while the first transport device 141 transports the first electrode 1112. Meanwhile, since the adhesive is applied to the first region 1221 of the separator sheet 122 on which the first electrode 1112 is placed in step S102, step S103 of applying adhesive to the lower part of the first electrode 1112 may or may not be performed depending on the circumstances. That is, step S103 may be selectively applied according to the environment in which the present invention is embodied and the requirements of the battery cell.

[0148] 1 and 2, the first header 151 can move linearly above the table 16 while adsorbing the first electrode 1112. When the first header 151 is positioned above the table 16, as shown in FIG. 3, the first header 151 places the first electrode 1112, on which the first adhesive layer 1710 is formed, on the first region 1221 of the separation membrane sheet 122 (S104).

[0149] 1 and 6, when the first electrode 1112 is placed on the first region 1221 of the separator sheet 122, the first upper nozzle 171 may apply adhesive to the upper part of the first electrode 1112 (S105). Here, the first upper nozzle 171 may move toward the first transfer device 141 to form a second adhesive layer 1750 on the upper part of the first electrode 1112.

[0150] Also, referring to Figures 1 and 7, with at least a portion of the second adhesive layer 1750 formed on the top of the first electrode 1112, the separation membrane guide 125 moves in the same direction as the moving direction of the first upper nozzle 171, one side of the separation membrane sheet 122 is folded, and the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112 (S106).

[0151] 3, when the second electrode sheet 1121 is unwound from the second electrode reel 112, the second cutter 132 cuts the second electrode sheet 1121. Then, a plurality of second electrodes 1122 are formed. When the second transport device 142 transports the second electrode 1122, the second header 152 adsorbs the second electrode 1122. Here, like the first electrode 1112, a first adhesive layer 1710 formed by applying an adhesive from a lower nozzle 173 may be located at the bottom of the second electrode 1122.

[0152] Then, as shown in FIG. 7, when the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112, the second header 152, which is adsorbing the second electrode 1122, moves toward the upper portion of the second region 1222 and places the second electrode 1122 on the upper portion of the second region 1222.

[0153] 8, the second upper nozzle 172 applies adhesive to the upper part of the second electrode 1122. Here, the second upper nozzle 172 moves toward the second transfer device 142 to form a second adhesive layer 1750 on the upper part of the second electrode 1122.

[0154] Thereafter, with at least a portion of the second adhesive layer 1750 formed on the top of the second electrode 1122, the separation membrane guide 125 moves in the same direction as the movement direction of the second upper nozzle 172, the other side of the separation membrane sheet 122 is folded, and the first region 1221 of the separation membrane sheet 122 covers the second electrode 1122.

[0155] In other words, the above process is repeated to perform the cell manufacturing method according to the embodiment of the present invention.

[0156] Hereinafter, a battery cell manufacturing method and apparatus according to another embodiment of the present invention will be described.

[0157] Fig. 9 is a flow chart of a battery cell manufacturing method according to another embodiment of the present invention, and Fig. 10 is a schematic view showing a state in which a first electrode is attached to a first region of a separator sheet in an apparatus for manufacturing a battery cell according to another embodiment of the present invention.

[0158] 9 and 10, a battery cell manufacturing method according to another embodiment of the present invention includes a step of cutting electrode sheets (first electrode sheet 1111, second electrode sheet 1121) to form electrodes 11 (S201), a step of placing a separator sheet 122 on a table 16 (S202), a step of applying adhesive to the bottom of the electrodes (first electrode 1112, second electrode 1122) (S203), a step of placing the electrodes (first electrode 1112, second electrode 1122) on the separator sheet 122 (S204), a step of applying adhesive to the separator sheet 122 (S204), and a step of folding the separator sheet 122 to which the adhesive has been applied to cover the electrodes (first electrode 1112, second electrode 1122) (S205).

[0159] Below, a battery cell manufacturing apparatus 2 according to another embodiment of the present invention will be described. Among the components of the battery cell manufacturing apparatus 2 of this embodiment, those that are the same as the components of the battery cell manufacturing apparatus 1 described above with reference to Figures 2 to 8 will be described with reference to Figures 2 to 8. Below, the components that differ from the battery cell manufacturing apparatus 1 will be mainly described.

[0160] Each step shown in the flowchart of FIG. 9 will now be described in detail with reference to FIGS.

[0161] A battery cell manufacturing apparatus 2 according to another embodiment of the present invention includes electrode reels (first electrode reel 111, second electrode reel 112) from which an electrode sheet on which a plurality of electrodes 11 are formed is unwound, a separation membrane reel 121 from which a separation membrane sheet 122 is unwound which is folded when the electrode 11 is placed on it, covers the electrode 11, and is laminated with the electrode 11, a table 16 on which the electrode 11 and the separation membrane sheet 122 are placed, a separation membrane guide 125 which guides the folding direction of the separation membrane sheet 122, and a pair of upper nozzles 17 which apply adhesive to the electrode 11 or at least a portion of the separation membrane sheet 122 guided by the separation membrane guide 125.

[0162] In the battery cell manufacturing apparatus 2 according to this embodiment, the table 16 is disposed between the first electrode reel 111 and the second electrode reel 112, and can rotate and reciprocate between the first electrode reel 111 and the second electrode reel 112. As an example, the table 16 can rotate and reciprocate between the first electrode reel 111 and the second electrode reel 112 within an angle range of 0 degrees to 180 degrees based on the bottom surface. However, the rotation angle of the table 16 is not limited thereto, and the table 16 can rotate at various angles.

[0163] As a result, the table 16 rotates back and forth between the first electrode reel 111 and the second electrode reel 112, allowing the electrodes 11 to be stacked on the table 16 more quickly and assisting in folding the separation membrane sheet 122 of the separation membrane guide 125, thereby further improving the process speed and efficiency.

[0164] Particularly, in this embodiment, the table 16 rotates and reciprocates between the first electrode reel 111 and the second electrode reel 112, so that the table 16 can rotate adjacent to the first transfer device 141 and the second transfer device 142, respectively. As a result, in this embodiment, the electrodes 11 transferred from the first transfer device 141 and the second transfer device 142 can be quickly stacked on the table 16.

[0165] In the battery cell manufacturing apparatus 2 according to this embodiment, the first header 151 and the second header 152 can each perform a rotational reciprocating motion in a direction in which they are positioned above the table 16. More specifically, the first header 151 and the second header 152 can perform a rotational reciprocating motion in a direction facing the upper surface of the table 16. The headers (first header 151, second header 152) further include rotational drivers 151a and 152b, respectively, to enable the rotational reciprocating motion.

[0166] Particularly, in this embodiment, the table 16 rotates adjacent to the first transfer device 141 and the second transfer device 142, respectively, and the first header 151 and the second header 152 can rotate and reciprocate toward the table 16.

[0167] As a result, in this embodiment, the first header 151 and the second header 152 can move the electrode 11 above the table 16, which rotates and reciprocates, and the electrode 11 can be stably placed on the separation membrane sheet 122.

[0168] Fig. 11 is a schematic diagram showing how adhesive is applied to the lower part of a first electrode in battery cell manufacturing apparatus 2 of Fig. 10. Fig. 12 is a schematic diagram showing a modified example of how adhesive is applied to the lower part of the first electrode of Fig. 11.

[0169] 11 and 12 show a case where a rotation driver 151a is further provided on a header (first header 151) that adsorbs the electrodes. For an explanation of the remaining components and a process of applying adhesive to the lower part of the first electrode, please refer to FIG. 4 and the explanation of FIG. 4 for the battery cell manufacturing apparatus 1.

[0170] The battery cell manufacturing apparatus 2 according to this embodiment is capable of applying adhesive to at least a portion of the lower surface of the electrode 11 during the transfer of the electrode 11, which has the advantage of improving the convenience and speed of the process.

[0171] 10, the adhesive is preferably applied uniformly to the lower part of the electrode 11. Thus, in this embodiment, in order to apply an appropriate amount of adhesive, the adhesive is preferably applied to the lower part of the electrode 11 by a spot application method in which the adhesive is applied in a dot shape or a line application method in which the adhesive is applied in a linear shape. In other words, the first adhesive layer 1710 is preferably formed in a spot pattern or a line pattern.

[0172] Meanwhile, in this embodiment, the adhesive can be dissolved in the electrolyte. For other descriptions of the adhesive in this embodiment, refer to the descriptions of the adhesive described above in relation to FIGS.

[0173] 13 and 14 are schematic diagrams showing how the table in the battery cell manufacturing apparatus 2 of FIG. 10 rotates while the separation membrane guide and the first upper nozzle move linearly and the first upper nozzle rotates to apply adhesive to the second region.

[0174] 10, 13, and 14, the pair of upper nozzles 17 apply adhesive to at least a portion of the separation membrane sheet 122 guided by the separation membrane guide 125. More specifically, the pair of upper nozzles 17 includes a first upper nozzle 171 that applies adhesive to at least a portion of the first region 1221 of the separation membrane sheet 122, and a second upper nozzle 172 that applies adhesive to at least a portion of the second region 1222 of the separation membrane sheet 122.

[0175] 10, adhesive can be applied by a pair of upper nozzles 17, which for convenience are referred to as "horizontal nozzles." That is, adhesive may be applied to the separation membrane sheet 122 with the outlets of the first upper nozzle 171 and the second upper nozzle 172 facing toward the separation membrane sheet 122 passing between the upper and lower separation membrane guides 125a, 125b.

[0176] 10 also shows a case where both the first upper nozzle 171 and the second upper nozzle 172 are rotated by 90 degrees for the sake of convenience. However, the first upper nozzle 171 and the second upper nozzle 172 do not necessarily need to rotate at the same time, and various modifications and variations are possible, such as only the first upper nozzle 171 rotating or only the second upper nozzle 172 rotating, as described below.

[0177] For a basic description of the pair of upper nozzles 17 in the battery cell manufacturing apparatus 2 of Fig. 10, that is, the first upper nozzle 171 and the second upper nozzle 172, refer to the description of the same components described above in relation to Fig. 2. However, parts in which the manufacturing process of the first upper nozzle 171 and the second upper nozzle 172 of the battery cell manufacturing apparatus 2 differs from the manufacturing process of the first upper nozzle 171 and the second upper nozzle 172 of the battery cell manufacturing apparatus 1 will be described in detail with reference to Figs. 13 to 16.

[0178] 13, the first upper nozzle 171 may apply adhesive to a surface covering the first electrode 1112 in the second region 1222 of the separator sheet 122. That is, the first upper nozzle 171 may apply adhesive to a surface opposite to a surface to which the second electrode 1122 is attached in the second region 1222 of the separator sheet 122. At this time, the first upper nozzle 171 may rotate counterclockwise to apply adhesive in the second region 1222 of the separator sheet 122.

[0179] 16, the second upper nozzle 172 may apply adhesive to a surface covering the second electrode 1122 in the first region 1221 of the separation membrane sheet 122. That is, the second upper nozzle 172 may apply adhesive to a surface opposite to a surface to which the first electrode 1112 is attached in the first region 1221 of the separation membrane sheet 122. In this case, the second upper nozzle 172 may apply adhesive to the first region 1221 of the separation membrane sheet 122 by rotating clockwise.

[0180] 10, 13 to 16, the first upper nozzle 171 and the second upper nozzle 172 may be disposed on both sides of the separation membrane sheet 122. That is, the first upper nozzle 171 can apply adhesive to at least a portion of the second region 1222 of the separation membrane sheet 122 before the second region 1222 of the separation membrane sheet 122 covers the upper portion of the first electrode 1112 to form the second adhesive layer 1750. Also, the second upper nozzle 172 can apply adhesive to at least a portion of the first region 1221 of the separation membrane sheet 122 before the first region 1221 of the separation membrane sheet 122 covers the upper portion of the second electrode 1122 to form the second adhesive layer 1750, as described later in relation to FIG.

[0181] In addition, depending on the case, the pair of upper nozzles 17 may or may not linearly reciprocate left and right based on the table 16. Whether or not they linearly reciprocate can be applied in various ways depending on the relative positions of the pair of upper nozzles 17, the table 16, and the separation membrane sheet 122. That is, the pair of upper nozzles 17 may apply adhesive to at least a part of the first region 1221 or the second region 1222 of the separation membrane sheet 122 while moving linearly from one side of the table 16 to the other side or in the opposite direction, or while being fixed.

[0182] As an example, referring to FIG. 10, FIG. 13, and FIG. 14, the first electrode 1112 is placed on the first region 1221 of the separation membrane sheet 122, and the first upper nozzle 171 can move linearly above the second region 1222 of the separation membrane sheet 122. Here, the first upper nozzle 171 can apply adhesive to at least a part of the second region 1222 while moving linearly in a direction away from the table 16. Also, as described later in relation to FIG. 16, the second electrode 1122 is placed on the second region 1222 of the separation membrane sheet 122, and the second upper nozzle 172 can move linearly above the first region 1221 of the separation membrane sheet 122. Here, the second upper nozzle 172 can apply adhesive to at least a part of the first region 1221 while moving linearly in a direction away from the table 16.

[0183] Furthermore, the adhesive applied from the pair of upper nozzles 17 in this embodiment can be explained in the same manner as the adhesive applied by the battery cell manufacturing apparatus 1 shown in FIG. 2 described above.

[0184] In addition, the pair of upper nozzles 17 may simultaneously or individually reciprocate left and right with respect to the table 16. More preferably, the pair of upper nozzles 17 may simultaneously reciprocate left and right with respect to the table 16. As an example, when the first upper nozzle 171 applies adhesive from one side to the other of a first region 1221 located on the right side of the table 16 as shown in Figures 13 and 14, the second upper nozzle 172 may apply adhesive from one side to the other of a second region 1222 located on the left side of the table 16 as described below in relation to Figure 16.

[0185] As a result, in this embodiment, it is possible to reduce the process time of the adhesive application process of the pair of upper nozzles 17. In addition, the adhesive application process of the pair of upper nozzles 17 can be performed simultaneously with the process of fixing the electrode 11 to the separator sheet 122, thereby further improving the process efficiency.

[0186] In addition, in this embodiment, the table 16 rotates and reciprocates between the first electrode reel 111 and the second electrode reel 112, thereby changing the position and / or angle between the pair of upper nozzles 17 and the separation membrane sheet 122. This may cause the application interval and / or application amount of the adhesive applied to the separation membrane sheet 122 from the pair of upper nozzles 17 to become non-uniform.

[0187] 13 and 14, when the pair of upper nozzles 17 each apply adhesive on the separation membrane sheet 122, the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 can rotate in a direction adjacent to the separation membrane sheet 122. The pair of upper nozzles 17 can rotate in a direction in which the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 faces the upper surface of the separation membrane sheet 122. In other words, the pair of upper nozzles 17 can adjust the angle between the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 and the upper surface of the separation membrane sheet 122, respectively.

[0188] As an example, the pair of upper nozzles 17 may be rotated to adjust the angle between the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 and the upper surface of the separation membrane sheet 122 to a constant angle. However, the rotation angle of the pair of upper nozzles 17 is not limited thereto, and any angle that provides a uniform interval between application of the adhesive is included in this embodiment.

[0189] 10, 13, and 14, the pair of upper nozzles 17 may be moved in a direction such that the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 is adjacent to the separation membrane sheet 122.

[0190] As an example, the positions of the pair of upper nozzles 17 can be moved and adjusted so that the height difference between the outlet of the first upper nozzle 171 or the outlet of the second upper nozzle 172 and the upper surface of the separation membrane sheet 122 is constant. However, the positions of the pair of upper nozzles 17 are not limited thereto, and any position that allows the adhesive application interval to be uniform is included in this embodiment.

[0191] As a result, in this embodiment, by adjusting the angle or position of the pair of upper nozzles 17, the application interval and / or application amount of adhesive applied from the pair of upper nozzles 17 can be made more uniform, and quality can also be improved.

[0192] FIG. 15 is a schematic diagram illustrating how the separator guide moves linearly in the opposite direction in the battery cell manufacturing apparatus of FIG. 10 and the second region coated with adhesive covers the first electrode.

[0193] 13 to 15, in this embodiment, the folding direction of the separation membrane sheet 122 may be guided by a separation membrane guide 125. More specifically, the separation membrane guide 125 may perform linear reciprocating motion to the left and right with respect to the table 16.

[0194] Also in this embodiment, the separation membrane guide 125 may include an upper separation membrane guide 125a and a lower separation membrane guide 125b located above and below the pair of upper nozzles 17. For an explanation of the separation membrane guide 125, refer to the explanation of the battery cell manufacturing apparatus 1 in Fig. 2. Also, the lower separation membrane guide 125b will be described in detail with reference to Fig. 27 described later.

[0195] Here, the separation membrane guide 125 can reciprocate left and right together with the pair of upper nozzles 17 with respect to the table 16, or the separation membrane guide 125 and the pair of upper nozzles 17 can each reciprocate left and right.

[0196] More preferably, the first upper nozzle 171 applies adhesive to at least a portion of the second region 1222 of the separation membrane sheet 122, while the separation membrane guide 125 moves linearly in a direction toward the second electrode reel 112 or the second transfer device 142. Also, as described later in relation to Figure 16, the second upper nozzle 172 applies adhesive to at least a portion of the first region 1221 of the separation membrane sheet 122, while the separation membrane guide 125 can move linearly in a direction toward the first electrode reel 111 or the first transfer device 141.

[0197] As a result, the separation membrane guide 125 forms an area on the separation membrane sheet 122 to which adhesive can be applied from the first upper nozzle 171 or the second upper nozzle 172, and the separation membrane guide 125 can assist the adhesive application process of the pair of upper nozzles 17.

[0198] In addition, when the separation membrane guide 125 moves linearly back and forth toward the first transfer device 141 and the second transfer device 142 based on the table 16, the separation membrane sheet 122 is folded along the moving direction of the separation membrane guide 125 so that the separation membrane sheet 122 can cover the electrode 11.

[0199] As an example, referring to FIG. 15 , with the first electrode 1112 fixed on the first region 1221 of the separation membrane sheet 122, the separation membrane guide 125 moves linearly toward the first conveying device 141, so that the second region 1222 of the separation membrane sheet 122 covers the top of the first electrode 1112.

[0200] More specifically, when the application of adhesive by the first upper nozzle 171 is completed as shown in Fig. 14, the separation membrane guide 125 moves linearly in a direction in which the second region 1222 of the separation membrane sheet 122 to which the adhesive is applied covers the first electrode 1112 as shown in Fig. 15. Similarly, when the application of adhesive by the second upper nozzle 172 is completed, the separation membrane guide 125 moves linearly in a direction in which the first region 1221 of the separation membrane sheet 122 to which the adhesive is applied covers the second electrode 1122.

[0201] As a result, in this embodiment, the separation membrane guide 125 can assist the adhesive application process of the pair of upper nozzles 17 and also perform the folding process of the separation membrane sheet 122, thereby reducing the process time and further improving the process efficiency.

[0202] FIG. 16 is a schematic diagram showing how a second electrode is attached to a second region of a separator sheet in the battery cell manufacturing apparatus of FIG.

[0203] 10 and 16, in the battery cell manufacturing apparatus 2 according to this embodiment, the table 16 may rotate and reciprocate toward the second electrode reel 112 or the second transfer device 142, similar to the first electrode 1112. At this time, the second electrode 1122 may be attracted to the second header 152 and rotate and reciprocate. As an example, as shown in FIG. 16, in a state in which the second electrode 1122 is attracted to the second header 152, the second header 152 may rotate to be positioned above the table 16. At this time, the second electrode 1122 may be placed on the second region 1222 of the separator sheet 122. In addition, the second electrode 1122 and the second header 152 may be described in the same manner as the first upper nozzle 171 described above.

[0204] Similarly to the first upper nozzle 171, the second upper nozzle 172 can perform a linear reciprocating motion based on the table 16. As an example, the second upper nozzle 172 can apply adhesive to at least a portion of the first region 1221 by moving from one side to the other side of the first region 1221 located on the right side of the table 16.

[0205] Using such a battery cell manufacturing apparatus 2, a battery cell manufacturing method according to another embodiment of the present invention can be carried out as follows.

[0206] First, referring to FIGS. 9 and 10, when the first electrode sheet 1111 is unwound from the first electrode reel 111, the first cutter 131 cuts the first electrode sheet 1111 to form a plurality of first electrodes 1112 (S201).

[0207] Meanwhile, when the separation membrane sheet 122 is unwound from the separation membrane reel 121, it is placed on the upper surface of the table 16 (S202). At this time, the table 16 can rotate toward the first electrode reel 111 or the first transport device 141 with the separation membrane sheet 122 fixed thereto.

[0208] In addition, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112 (S203). As an example, as shown in FIG. 11, the lower nozzle applies adhesive to the lower part of the first electrode 1112 while the first header 151 is adsorbing the first electrode 1112. As another example, as shown in FIG. 12, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112 while the first transport device 141 transports the first electrode 1112.

[0209] 9 and 10, the first header 151 can rotate and move above the table 16 while adsorbing the first electrode 1112. When the first header 151 is positioned above the table 16, as shown in FIG 10, the first header 151 places the first electrode 1112, on which the first adhesive layer 1710 is formed, on the first region 1221 of the separation membrane sheet 122 (S204).

[0210] 9, 13, and 14, when the first electrode 1112 is placed on the first region 1221 of the separation membrane sheet 122, the first upper nozzle 171 can apply adhesive to the second region 1222 of the separation membrane sheet 122 while the separation membrane sheet 122 is unwound from the separation membrane reel 121 (S205). At this time, the outlet of the first upper nozzle 171 applies adhesive toward the second region 1222 of the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b.

[0211] In some cases, the first upper nozzle 171 may move toward the second transfer device 142 to form a second adhesive layer 1750 in the second region 1222 of the separation membrane sheet 122. At this time, both the separation membrane guide 125 and the first upper nozzle 171 may move linearly.

[0212] Also, referring to Figures 9 and 15, with at least a portion of the second adhesive layer 1750 formed on the second region 1222 of the separation membrane sheet 122, the separation membrane guide 125 moves in a direction toward the first conveying device 141, which is opposite to the moving direction of the first upper nozzle 171, and one side of the separation membrane sheet 122 is folded so that the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112 (S206).

[0213] 10, when the second electrode sheet 1121 is unwound from the second electrode reel 112, the second cutter 132 cuts the second electrode sheet 1121. Then, a plurality of second electrodes 1122 are formed. When the second transport device 142 transports the second electrode 1122, the second header 152 adsorbs the second electrode 1122. Here, like the first electrode 1112, a first adhesive layer 1710 formed by applying an adhesive from a lower nozzle 173 may be located at the bottom of the second electrode 1122.

[0214] 16, the table 16 may rotate toward the second electrode reel 112 or the second transport device 142 with the second region 1222 of the separation membrane sheet 122 fixed thereon. At this time, when the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112, the second header 152 adsorbing the second electrode 1122 moves toward the upper portion of the second region 1222 and places the second electrode 1122 on the upper portion of the second region 1222.

[0215] 16, the second upper nozzle 172 applies adhesive to the first region 1221 of the separation membrane sheet 122. Here, the second upper nozzle 172 moves toward the first transfer device 141 to form a second adhesive layer 1750 in the first region 1221 of the separation membrane sheet 122. At this time, both the separation membrane guide 125 and the second upper nozzle 172 may move linearly.

[0216] Thereafter, with at least a portion of the second adhesive layer 1750 formed on the first region 1221 of the separation membrane sheet 122, the separation membrane guide 125 moves in a direction toward the second conveying device 142, which is opposite to the moving direction of the second upper nozzle 172, and the other side of the separation membrane sheet 122 is folded so that the first region 1221 of the separation membrane sheet 122 covers the second electrode 1122.

[0217] In other words, by repeating the above process, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0218] When performing the cell manufacturing method according to the embodiment of the present invention, when the electrode 11 and the separator sheet 122 are stacked in a Z-folding type, adhesive is applied to the upper and lower parts of the electrode 11, respectively, so that the electrode 11 can be prevented from coming off from the correct position.

[0219] Hereinafter, a battery cell manufacturing method and apparatus according to another embodiment of the present invention will be described.

[0220] Fig. 17 is a flow chart of a battery cell manufacturing method according to another embodiment of the present invention. Fig. 18 is a schematic diagram showing a state in which a first electrode is attached to a first region of a separator sheet in a battery cell manufacturing apparatus according to another embodiment of the present invention. Fig. 19 is a schematic diagram showing a state in which a first electrode is attached to a first region of a separator sheet in the battery cell manufacturing apparatus of Fig. 18.

[0221] 17 and 18, a method for manufacturing a battery cell according to another embodiment of the present invention includes a step of cutting electrode sheets (first electrode sheet 1111, second electrode sheet 1121) to form an electrode 11 (S301), a step of applying adhesive to a separator sheet 122 and placing the separator sheet 122 with the adhesive applied on a table 16 (S302), a step of placing an electrode 11 on the separator sheet 122 (S303), a step of applying adhesive to the top of the electrode 11 (S304), a step of applying adhesive to the separator sheet 122 (S305), and a step of folding the separator sheet 122 to cover the electrode 11 (S306).

[0222] Below, a battery cell manufacturing apparatus 3 according to another embodiment of the present invention will be described. Among the components of the battery cell manufacturing apparatus 3 of this embodiment, those that are the same as the components of the battery cell manufacturing apparatus 1 described above with reference to Figures 2 to 8 will be described with reference to Figures 2 to 8. Below, the components that differ from the battery cell manufacturing apparatus 1 will be mainly described.

[0223] A battery cell manufacturing apparatus 3 according to another embodiment of the present invention includes electrode reels (first electrode reel 111, second electrode reel 112) from which an electrode sheet on which multiple electrodes 11 are formed is unwound, a separation membrane reel 121 from which a separation membrane sheet 122 is unwound when the electrode 11 is placed thereon, which is folded to cover the electrode 11 and be laminated with the electrode 11, a table 16 on which the electrode 11 and the separation membrane sheet 122 are placed, a separation membrane guide 125 that guides the folding direction of the separation membrane sheet 122, a pair of upper nozzles 17 that apply adhesive to at least a portion of the separation membrane sheet 122 or the electrode 11 guided by the separation membrane guide 125, and a pair of pressure rollers 130 that pressurize the separation membrane sheet 122 guided by the separation membrane guide 125.

[0224] In the battery cell manufacturing apparatus 3 according to this embodiment, the table 16 is disposed between the first electrode reel 111 and the second electrode reel 112, and may perform linear reciprocating motion toward the first electrode reel 111 and the second electrode reel 112.

[0225] As a result, the table 16 moves back and forth linearly between the first electrode reel 111 and the second electrode reel 112, allowing the electrodes 11 to be stacked on the table 16 more quickly and assisting in folding the separation membrane sheet 122 of the separation membrane guide 125, thereby further improving the process speed and efficiency.

[0226] 18 and 19, in a battery cell manufacturing apparatus 3 according to this embodiment, a first header 151 and a second header 152 may each move linearly back and forth toward a table 16, similar to the battery cell manufacturing apparatus 1 of FIG.

[0227] 18 and 20, the pair of upper nozzles 17 apply adhesive to at least a portion of the upper surface of the electrode 11. More specifically, the pair of upper nozzles 17 includes a first upper nozzle 171 that applies adhesive to at least a portion of the upper surface of the first electrode 1112 and a second upper nozzle 172 that applies adhesive to at least a portion of the upper surface of the second electrode 1122.

[0228] Here, the first upper nozzle 171 can apply adhesive to the first region 1221 of the separation membrane sheet 122 guided by the separation membrane guide 125 to form a first adhesive layer 1710, as shown in Fig. 18. More specifically, the table 16 moves linearly toward the first transfer device 141 as shown in Fig. 18, so that the adhesive applied from the first upper nozzle 171 can form the first adhesive layer 1710 in the first region 1221 of the separation membrane sheet 122. Thereafter, the first electrode 1112 can be placed on the first region 1221 of the separation membrane sheet 122 on which the first adhesive layer 1710 has been formed.

[0229] Meanwhile, in the battery cell manufacturing apparatus 3 of Fig. 18, adhesive can also be applied using a horizontal nozzle. More specifically, in the battery cell manufacturing apparatus 2 of Fig. 18, adhesive can also be applied using a pair of upper nozzles 17, which for convenience are referred to as "horizontal nozzles". In other words, adhesive may be applied to the separation membrane sheet 122 with the respective outlets of the first upper nozzle 171 and the second upper nozzle 172 directed toward the separation membrane sheet 122 passing between the upper and lower separation membrane guides 125a, 125b.

[0230] 18 also shows a case where both the first upper nozzle 171 and the second upper nozzle 172 are rotated by 90 degrees for the sake of convenience. However, the first upper nozzle 171 and the second upper nozzle 172 do not necessarily need to rotate at the same time, and various modifications and variations are possible, such as only the first upper nozzle 171 rotating or only the second upper nozzle 172 rotating, as described below.

[0231] For a basic explanation of each of the pair of upper nozzles 17 in the battery cell manufacturing apparatus 3 of Fig. 18, that is, the first upper nozzle 171 and the second upper nozzle 172, refer to the explanation of the same components described above in relation to Fig. 2. However, parts in which the manufacturing process of each of the first upper nozzle 171 and the second upper nozzle 172 of the battery cell manufacturing apparatus 3 differs from the manufacturing process of each of the first upper nozzle 171 and the second upper nozzle 172 of the battery cell manufacturing apparatus 1 will be described in detail with reference to Figs. 18 to 22.

[0232] Meanwhile, in this embodiment, the adhesive may be applied in a spot coating manner in which the adhesive is applied in a dot shape to the first region 1221 of the separator sheet 122, or in a line coating manner in which the adhesive is applied in a linear shape. Also, in this embodiment, the adhesive may be dissolved in the electrolyte. For other descriptions of the adhesive in this embodiment, please refer to the descriptions of the adhesive described above with reference to FIGS. 1 to 8.

[0233] 18 to 22, the battery cell manufacturing apparatus 3 according to this embodiment may include a pair of pressure rollers 130 that pressurize the separation membrane sheet 122 guided by the separation membrane guide 125. In this embodiment, as an example, the pair of pressure rollers 130 is shown positioned between the table 16 and the separation membrane guide 125. However, the present invention is not limited to what is shown, and the pair of pressure rollers 130 may be appropriately modified or changed and positioned at a point where pressure is required for the process, for example, the pair of pressure rollers 130 may be positioned between the upper separation membrane guide 125a and the lower separation membrane guide 125b. Meanwhile, the pair of pressure rollers 130 may be fixed.

[0234] As an example, the pair of pressure rollers 130 may have a form in which a pair of rolls are arranged horizontally, and the pressure roller 130 can press one side of the separation membrane sheet 122. However, the form of the pressure roller 130 is not limited thereto, and any form capable of pressing one side of the separation membrane sheet 122 is included in this embodiment.

[0235] Thereby, at least one of the pair of pressure rollers 130 can press one surface of the separation membrane sheet 122 as shown in FIGS. 18 and 19, thereby controlling the tension of the separation membrane sheet 122 to be constant.

[0236] In particular, the pair of pressure rollers 130 may be located between the first upper nozzle 171 and the second upper nozzle 172. More specifically, the pair of pressure rollers 130 may include a first pressure roller 1301 and a second pressure roller 1302. Here, the first pressure roller 1301 may be located between the first upper nozzle 171 and the separation membrane guide 125, and the second pressure roller 1302 may be located between the second upper nozzle 172 and the separation membrane guide 125. In other words, the first upper nozzle 171 and the second upper nozzle 172 can apply adhesive onto the separation membrane sheet 122 pressed by at least one of the pair of pressure rollers 130.

[0237] 18, the first pressure roller 1301 can pressurize one side of the separation membrane sheet 122 while the adhesive is applied from the first upper nozzle 171 to the first region 1221 of the separation membrane sheet 122. As a result, the first pressure roller 1301 can maintain a constant height difference between the first region 1221 of the separation membrane sheet 122 and the first upper nozzle 171, so that the application amount or thickness of the first adhesive layer 1710 can be relatively uniform. This can be similarly explained in the case of the second pressure roller 1302.

[0238] In addition, with the separation membrane sheet 122 being pressed by the first pressure roller 1301, the first upper nozzle 171 may adjust the height or angle between the first region 1221 of the separation membrane sheet 122 and the first upper nozzle 171. As an example, based on the first region 1221 of the separation membrane sheet 122, the first upper nozzle 171 may move so that the height difference between the first region 1221 of the separation membrane sheet 122 and the first upper nozzle 171 becomes constant, or may rotate so that the angle between the first region 1221 of the separation membrane sheet 122 and the first upper nozzle 171 becomes constant.

[0239] As a result, the height difference or angle between the first upper nozzle 171 and the first region 1221 of the separation membrane sheet 122 can be maintained constant while the separation membrane sheet 122 is pressed by the first pressure roller 1301, and the application reliability of the adhesive applied from the first upper nozzle 171 to the first region 1221 of the separation membrane sheet 122 can be improved. This can be similarly explained when the second upper nozzle 172 applies the adhesive to the second region 1222 of the separation membrane sheet 122 while the separation membrane sheet 122 is pressed by the second pressure roller 1302 as shown in Figures 21 and 22.

[0240] Fig. 20 is a schematic diagram showing how adhesive is applied to the top of a first electrode while the table moves linearly in the battery cell manufacturing apparatus of Fig. 18. Fig. 21 is a schematic diagram showing how adhesive is applied to a second region of a separator membrane sheet while the table moves linearly in the battery cell manufacturing apparatus of Fig. 18.

[0241] 18 to 21, the first upper nozzle 171 and the second upper nozzle 172 may be disposed on both sides of the separation membrane sheet 122.

[0242] That is, the first upper nozzle 171 can apply adhesive to at least a part of the upper portion of the first electrode 1112 before the upper portion of the first electrode 1112 is covered by the second region 1222 of the separation membrane sheet 122, as shown in Fig. 20, to form the second adhesive layer 1750. Also, the second upper nozzle 172 can apply adhesive to at least a part of the second region 1222 of the separation membrane sheet 122 after the upper portion of the first electrode 1112 is covered by the second region 1222 of the separation membrane sheet 122, as shown in Fig. 21, to form the first adhesive layer 1710. In this case, the second upper nozzle 172 can rotate clockwise to apply adhesive to the second region 1222 of the separation membrane sheet 122.

[0243] The opposite case is also true, and the second upper nozzle 172 can apply adhesive to at least a portion of the upper portion of the second electrode 1122 before the upper portion of the second electrode 1122 is covered by the first region 1221 of the separation membrane sheet 122 to form the second adhesive layer 1750. Also, the first upper nozzle 171 can apply adhesive to at least a portion of the first region 1221 of the separation membrane sheet 122 after the upper portion of the second electrode 1122 is covered by the first region 1221 of the separation membrane sheet 122 to form the first adhesive layer 1710. In this case, the first upper nozzle 171 can apply adhesive to the first region 1221 of the separation membrane sheet 122 by rotating counterclockwise.

[0244] Furthermore, the adhesive applied from the pair of upper nozzles 17 in this embodiment can be explained in the same manner as the adhesive applied by the battery cell manufacturing apparatus 1 shown in FIG. 2 described above.

[0245] In this embodiment, the table 16 can move linearly back and forth from left to right based on the pair of upper nozzles 17. That is, the table 16 can apply adhesive to at least a portion of the upper surface of the electrode 11 or the separator sheet 122 while moving linearly in a direction toward the first transfer device 141 or the second transfer device 142 based on the pair of upper nozzles 17.

[0246] 20 and 21, before the second region 1222 of the separation membrane sheet 122 covers the top of the first electrode 1112, the first upper nozzle 171 can apply adhesive to at least a portion of the top of the first electrode 1112 to form a second adhesive layer 1750, and the second upper nozzle 172 can apply adhesive to at least a portion of the second region 1222 of the separation membrane sheet 122 to form a first adhesive layer 1710. Conversely, before the first region 1221 of the separation membrane sheet 122 covers the top of the second electrode 1122, the second upper nozzle 172 can apply adhesive to at least a portion of the top of the second electrode 1122 to form a second adhesive layer 1750, and the first upper nozzle 171 can apply adhesive to at least a portion of the first region 1221 of the separation membrane sheet 122 to form a first adhesive layer 1710.

[0247] As a result, in this embodiment, a pair of upper nozzles 17 can simultaneously apply adhesive to the upper part of the separator sheet 122 or the electrode 11, respectively, thereby reducing the process time of the adhesive application process and further improving the process efficiency.

[0248] 20, the pair of pressure rollers 130 may be spaced apart from the second adhesive layer 1750 formed on the first electrode 1112. This prevents the adhesive applied to the second adhesive layer 1750 formed on the first electrode 1112 from directly contacting the pair of pressure rollers 130 when the table 16 moves linearly.

[0249] 21, the second pressure roller 1302 may pressurize the first adhesive layer 1710 and / or the second adhesive layer 1750 between the second region 1222 of the separation membrane sheet 122 and the first electrode 1112 in a direction opposite to the moving direction of the table 16 while pressing one side of the separation membrane sheet 122. This allows the first adhesive layer 1710 and / or the second adhesive layer 1750 formed between the first electrode 1112 and the second region 1222 of the separation membrane sheet 122 to be more uniformly applied. This can be similarly explained when the first pressure roller 1301 presses the first region 1221 of the separation membrane sheet 122 covering the second electrode 1122 on which the first adhesive layer 1710 is formed.

[0250] FIG. 22 is a schematic diagram showing how the separator guide moves linearly in the battery cell manufacturing apparatus of FIG. 18 and how the second electrode is fixed onto the second region of the separator sheet.

[0251] 21 and 22, in this embodiment, the folding direction of the separator sheet 122 may be guided by a separator guide 125. Here, a pair of pressure rollers 130 may help the separator guide 125 guide the folding direction of the separator sheet 122.

[0252] As an example, the separation membrane guide 125 may have a form in which a pair of rolls are arranged horizontally, and the second pressure roller 1302 may pressurize the separation membrane sheet 122 in a state in which the separation membrane sheet 122 is inserted between the pair of pressure rollers 130. However, the form of the separation membrane guide 125 is not limited thereto, and any form capable of controlling the folding direction of the separation membrane sheet 122 is included in this embodiment.

[0253] Also, in this embodiment, the separation membrane guide 125 may include an upper separation membrane guide 125a and a lower separation membrane guide 125b, which are respectively located above and below the pair of upper nozzles 17. For an explanation of the separation membrane guide 125, refer to the explanation of the battery cell manufacturing apparatus 1 of FIG. 2 described above. Also, the lower separation membrane guide 125b will be described in detail with reference to FIG. 27 described below. Also, the separation membrane guide 125 may be fixed together with the pair of upper nozzles 17 and the pair of pressure rollers 130. Here, the table 16 linearly reciprocates with respect to the separation membrane guide 125 toward the first transfer device 141 and the second transfer device 142, and the separation membrane sheet 122 guided by the separation membrane guide 125 is folded along the moving direction of the separation membrane guide 125, so that the separation membrane sheet 122 can cover the electrodes 11.

[0254] As an example, referring to Figures 21 and 22, with the first electrode 1112 fixed on the first region 1221 of the separation membrane sheet 122, the table 16 can move linearly toward the second conveying device 142 so that the second region 1222 of the separation membrane sheet 122 covers the top of the first electrode 1112.

[0255] As a result, the linear reciprocating motion of the table 16 allows the adhesive application process by the pair of upper nozzles 17 and the folding process of the separation membrane sheet 122 by the separation membrane guide 125 to be performed simultaneously, thereby reducing the process time and further improving the process efficiency.

[0256] Using such a unit cell manufacturing apparatus 3, a unit cell manufacturing method according to another embodiment of the present invention can be carried out as follows.

[0257] First, referring to FIGS. 17 and 18, when the first electrode sheet 1111 is unwound from the first electrode reel 111, the first cutter 131 cuts the first electrode sheet 1111 to form a plurality of first electrodes 1112 (S301).

[0258] Meanwhile, while the separation membrane sheet 122 is being unwound from the separation membrane reel 121, an adhesive is applied to the first region 1221 of the separation membrane sheet 122. At this time, the outlet of the first upper nozzle 171 applies the adhesive to the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b and is placed on the upper surface of the table 16 (S302). At this time, the separation membrane sheet 122 moves while being pressed by the first pressure roller 1301 and is placed on the upper surface of the table 16. In some cases, the table 16 may move linearly toward the first transfer device 141.

[0259] 17 and 19, the first header 151 can move linearly above the table 16 while adsorbing the first electrode 1112. When the first header 151 is positioned above the table 16, as shown in FIG 19, the first header 151 places the first electrode 1112 on the first region 1221 of the separation membrane sheet 122 on which the first adhesive layer 1710 is formed (S303).

[0260] Also, referring to Figures 17, 20 and 21, after the first electrode 1112 is placed on the first region 1221 of the separation membrane sheet 122, the table 16 moves toward the second transfer device 142, and the first upper nozzle 171 applies adhesive to the top of the first electrode 1112 to form a second adhesive layer 1750 (S304).

[0261] In addition, an adhesive is applied to the second region 1222 of the separation membrane sheet 122 unwound from the separation membrane reel 121 to form a first adhesive layer 1710 (S305). The outlet of the second upper nozzle 172 applies the adhesive to the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b. At this time, the adhesive can be applied in a state in which one side of the separation membrane sheet 122 is pressed by the second pressure roller 1302, and the table 16 moves toward the second transfer device 142.

[0262] Also, referring to Figures 17, 21 and 22, as the table 16 moves toward the second transfer device 142 based on the separation membrane guide 125, one side of the separation membrane sheet 122 is folded and the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112 on which the second adhesive layer 1750 is formed (S306).

[0263] Steps S304, S305, and S306 may be performed sequentially, all three steps may be performed simultaneously, S304 and S305 may be performed simultaneously, S305 and S306 may be performed simultaneously, and in some cases, steps S304 and S305 may be performed alternatively, and the present invention can be applied in various ways according to the environment in which it is embodied.

[0264] Meanwhile, as shown in FIG. 18, when the second electrode sheet 1121 is unwound from the second electrode reel 112, the second cutter 132 cuts the second electrode sheet 1121. Then, a plurality of second electrodes 1122 are formed. Thereafter, as shown in FIG. 22, when the second transport device 142 transports the second electrode 1122, the second header 152 adsorbs the second electrode 1122. Then, when the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112, the second header 152 adsorbing the second electrode 1122 moves toward the upper portion of the second region 1222, and places the second electrode 1122 on the second region 1222 where the first adhesive layer 1710 is formed.

[0265] 20, the second upper nozzle 172 applies adhesive to the upper part of the second electrode 1122. Here, as the table 16 moves toward the first transfer device 141, the second upper nozzle 172 can form a second adhesive layer 1750 on the upper part of the second electrode 1122.

[0266] Thereafter, the table 16 moves toward the first transfer device 141 based on the separation membrane guide 125, whereby the other side of the separation membrane sheet 122 is folded and the first region 1221 of the separation membrane sheet 122 covers the second electrode 1122 on which the second adhesive layer 1750 is formed.

[0267] In other words, by repeating the above process, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0268] The following describes an embodiment in which the battery cell manufacturing apparatus in Fig. 18 is partially modified. The battery cell manufacturing apparatus 3a of this embodiment can be explained in almost the same way as the battery cell manufacturing apparatus 3 described above with reference to Fig. 18 to Fig. 22, and only the parts that differ from the battery cell manufacturing apparatus 3 will be explained below.

[0269] FIG. 23 is a schematic diagram of a battery cell manufacturing apparatus that is a partial modification of the battery cell manufacturing apparatus of FIG. 18, showing how adhesive is applied to a first region of a separator membrane sheet while a first upper nozzle moves linearly.

[0270] 23, in the battery cell manufacturing apparatus 3a of this embodiment, the table 16a may be fixed. This allows the electrodes 11 and the separator sheets 122 to be stacked on the table 16a in a fixed state, thereby further improving the alignment of the electrodes 11 and the separator sheets 122.

[0271] In addition, the separation membrane guide 125, the first upper nozzle 171a, and the second upper nozzle 172a can move linearly back and forth from the table 16a to the left and right. For example, as shown in FIG. 23, the first upper nozzle 171a can apply adhesive to the first region 1221 of the separation membrane sheet 122 to form a first adhesive layer 1710 by moving linearly from the table 16a toward the second transfer device 142.

[0272] In addition, the pair of pressure rollers 130 may move together with the separation membrane guide 125, the first upper nozzle 171a, and the second upper nozzle 172a while pressing one side of the separation membrane sheet 122. As an example, the first pressure roller 1301 may move together with the second pressure roller 1302, the first upper nozzle 171a, and the second upper nozzle 172a while pressing one side of the separation membrane sheet 122. This allows the pair of pressure rollers 130 to maintain the tension of the separation membrane sheet 122. At the same time, the height difference between the first upper nozzle 171a and the second upper nozzle 172a and the separation membrane sheet 122 can be maintained. The pair of pressure rollers 130 will be described in detail with reference to FIG. 28 described later.

[0273] As an example, the battery cell manufacturing apparatus 3a of this embodiment may further include a moving box 18 that houses the separation membrane guide 125, the first upper nozzle 171a, and the second upper nozzle 172a. In other words, in the battery cell manufacturing apparatus 3a of this embodiment, the separation membrane guide 125, the first upper nozzle 171a, and the second upper nozzle 172a may move simultaneously as the moving box 18 moves.

[0274] This allows the distance between the first upper nozzle 171a and the separation membrane guide 125, and the distance between the second upper nozzle 172a and the separation membrane guide 125 to be maintained constant, thereby improving the application reliability of the adhesive applied from the first upper nozzle 171a and the second upper nozzle 172a.

[0275] In addition, the angle of the first upper nozzle 171a and / or the second upper nozzle 172a may be rotated or the first upper nozzle 171a and the second upper nozzle 172a may be moved within the moving box 18 to adjust the height difference or angle between the first upper nozzle 171a and / or the second upper nozzle 172a and the separation membrane (separation membrane sheet 122). Even in this case, the distance between the first upper nozzle 171a and the separation membrane guide 125 and the distance between the second upper nozzle 172a and the separation membrane guide 125 may be maintained the same within the moving box 18, thereby further improving the application reliability of the adhesive applied from the first upper nozzle 171a and the second upper nozzle 172a.

[0276] Using such a battery cell manufacturing apparatus 3a, a battery cell manufacturing method according to still another embodiment of the present invention is carried out as follows.

[0277] 17 and 23, when the first electrode sheet 1111 is unwound from the first electrode reel 111, the first cutter 131 cuts the first electrode sheet 1111 to form a plurality of first electrodes 1112 (S301).

[0278] Meanwhile, while the separation membrane sheet 122 is being unwound from the separation membrane reel 121, adhesive is applied to the first region 1221 of the separation membrane sheet 122. At this time, the outlet of the first upper nozzle 171 applies adhesive to the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b and is placed on the upper surface of the table 16 (S302). At this time, the separation membrane sheet 122 moves in a state where it is pressed by the first pressure roller 1301, and is placed on the upper surface of the table 16a. In some cases, the moving box 18 may move linearly toward the second transfer device 142.

[0279] FIG. 24 is a schematic diagram showing how a first electrode is fixed to a first region of a separator sheet in the battery cell manufacturing apparatus of FIG.

[0280] 17 and 24, the first header 151 can move linearly above the table 16 (16a) while adsorbing the first electrode 1112. When the first header 151 is positioned above the table 16a, as shown in FIG. 24, the first header 151 places the first electrode 1112 on the first region 1221 of the separation membrane sheet 122 on which the first adhesive layer 1710 is formed (S303).

[0281] Fig. 25 is a schematic diagram showing how adhesive is applied to the upper part of a first electrode while a first upper nozzle moves linearly in the battery cell manufacturing apparatus of Fig. 23. Fig. 26 is a schematic diagram showing how adhesive is applied to a second region of a separator membrane sheet and a second electrode is fixed to the second region of the separator membrane sheet while a second upper nozzle moves linearly in the battery cell manufacturing apparatus of Fig. 23.

[0282] Also, referring to Figures 17, 25 and 26, after the first electrode 1112 is placed on the first region 1221 of the separation membrane sheet 122, the first upper nozzle 171a moves toward the first transport device 141, and the first upper nozzle 171a applies adhesive to the top of the first electrode 1112 to form a second adhesive layer 1750 (S304).

[0283] In addition, an adhesive is applied to the second region 1222 of the separation membrane sheet 122 unwound from the separation membrane reel 121 to form a first adhesive layer 1710 (S305). The outlet of the second upper nozzle 172 applies the adhesive to the separation membrane sheet 122 that has passed through the upper separation membrane guide 125a. The separation membrane sheet 122 to which the adhesive has been applied passes through the lower separation membrane guide 125b. At this time, the adhesive can be applied in a state in which one side of the separation membrane sheet 122 is pressed by the second pressure roller 1302, and the moving box 18 moves toward the first transfer device 141.

[0284] Also, referring to Figures 17, 25 and 26, the separation membrane guide 125 and the pair of pressure rollers 130 move toward the first transfer device 141 based on the table 16a, so that one side of the separation membrane sheet 122 is folded and the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112 on which the second adhesive layer 1750 is formed (S306).

[0285] Steps S304, S305, and S306 may be performed sequentially, all three steps may be performed simultaneously, S304 and S305 may be performed simultaneously, or S305 and S306 may be performed simultaneously, and the present invention can be applied in various ways according to the environment in which it is embodied.

[0286] Meanwhile, as shown in FIG. 23, when the second electrode sheet 1121 is unwound from the second electrode reel 112, the second cutter 132 cuts the second electrode sheet 1121. Then, a plurality of second electrodes 1122 are formed. Thereafter, as shown in FIG. 26, when the second transport device 142 transports the second electrode 1122, the second header 152 adsorbs the second electrode 1122. Then, when the second region 1222 of the separation membrane sheet 122 covers the first electrode 1112, the second header 152 adsorbing the second electrode 1122 moves toward the upper portion of the second region 1222, and places the second electrode 1122 on the second region 1222 where the first adhesive layer 1710 is formed.

[0287] 25, the second upper nozzle 172 applies adhesive to the upper part of the second electrode 1122. Here, as the second upper nozzle 172a moves toward the second transfer device 142, the second upper nozzle 172a can form a second adhesive layer 1750 on the upper part of the second electrode 1122.

[0288] Thereafter, the separation membrane guide 125 and the pair of pressure rollers 130 move toward the second transfer device 142 based on the table 16a, whereby the other side of the separation membrane sheet 122 is folded and the first region 1221 of the separation membrane sheet 122 covers the second electrode 1122 on which the second adhesive layer 1750 is formed.

[0289] In other words, by repeating the above process, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0290] When performing the cell manufacturing method according to the embodiment of the present invention, when the electrode 11 and the separator sheet 122 are stacked in a Z-folding type, adhesive is applied to the upper and lower parts of the electrode 11, respectively, so that the electrode 11 can be prevented from coming off from the correct position.

[0291] Fig. 27 shows one example of a lower separation membrane guide 125b according to an embodiment of the present invention. The lower separation membrane guide 125b can be applied to, for example, the battery cell manufacturing apparatuses 1, 2, 3, and 3a described above. The lower separation membrane guide 125b can be provided on, for example, a pair of rollers, and Fig. 27 shows only one of the rollers for ease of explanation.

[0292] The lower separation membrane guide 125b includes at least one recess 1125 on its surface. The recess 1125 is provided at a position corresponding to the adhesive applied to the separation membrane (separation membrane sheet 122). When the separation membrane (separation membrane sheet 122) to which the adhesive is applied passes through the lower separation membrane guide 125b, the adhesive applied to the separation membrane (separation membrane sheet 122) can pass through the recess 1125. This prevents the surface of the lower separation membrane guide 125b from being contaminated by the adhesive.

[0293] In the case where the lower separation membrane guide 125b is, for example, a pair of rollers, the recess 1125 may be a recess formed along the outer circumferential surface of the roller. The shape and structure of the lower separation membrane guide 125b and the shape and structure of the recess 1125 according to the present invention are not limited to those shown, and may be modified or changed according to various environments in which the present invention is embodied.

[0294] 28 shows an example of a pressure roller 130 according to an embodiment of the present invention. The pressure roller 130 can be applied to, for example, the battery cell manufacturing apparatus 3, 3a described above. The pressure roller 130 also includes at least one recess 1130 on its surface, similar to the lower separation membrane guide 125b. The recess 1130 of the pressure roller is provided at a position corresponding to the adhesive applied to the separation membrane (separation membrane sheet 122). The adhesive applied to the separation membrane (separation membrane sheet 122) can pass through the recess 1130 of the pressure roller. This can prevent the surface of the lower separation membrane guide 125b from being contaminated by the adhesive.

[0295] In summary, the portion of the separation membrane (separation membrane sheet 122) to which the adhesive is applied can pass through the recess 1125 of the lower separation membrane guide 125b and the recess 1130 of the pressure roller .

[0296] When the pressure roller 130 is, for example, a roller, the recesses 1130 may be recesses formed along the outer circumferential surface of the roller. The shape, structure, and number of the pressure roller 130 according to the present invention and the shape, structure, and number of the recesses 1130 are not limited to those shown, and may be modified or changed according to various environments in which the present invention is embodied.

[0297] FIG. 29 is a schematic diagram showing an embodiment of a pressurizing jig according to the present invention.

[0298] The battery cell manufacturing apparatuses 1, 2, 3, and 3a according to the embodiments of the present invention may further include a pressurizing jig 200 shown in Fig. 29. After going through a series of steps in the above-described embodiments, an electrode assembly 10 is provided in which the electrodes and separator sheets are stacked alternately, i.e., in a zigzag manner.

[0299] The electrode assembly 10 is pressed by a press jig 200, and then a separator is wound on the electrode assembly 10. By performing the pressing process on the electrode assembly 10 in which the electrodes and separator sheets are alternately stacked, the adhesive thickness is minimized and made uniform, improving the winding quality in the subsequent separator winding process. This can increase the rigidity of the completed battery cell.

[0300] Here, the zig-pressurization process may include a process of applying and releasing pressure using a jig (pressurization jig 200) that presses both the top and bottom surfaces of the electrode assembly 10 stacked in a zigzag manner. In other words, one cycle of applying and releasing pressure to the electrode assembly 10 using the zig (pressurization jig 200) may be repeated at least twice.

[0301] The process of applying and releasing pressure with the jig (pressure jig 200) is a process of directly exerting physical force by alternately applying positive and negative pressure to the adhesive in the process of dissolving, which has the effect of making the adhesive more likely to dissolve.

[0302] In this case, a control device may be connected to the jig device for more systematic operation, thereby adjusting the time of positive pressure and the time of negative pressure, and also controlling the magnitude of positive pressure and negative pressure, thereby implementing a more effective adhesive dissolving system.

[0303] FIG. 30 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention.

[0304] Referring to FIG. 30, in an electrode assembly 10 in which electrodes and separator sheets according to an embodiment of the present invention are alternately stacked, the electrode 11 includes a first electrode 1112 and a second electrode 1122, and the separator sheet 122 has a zigzag shape formed by folding at least two times.

[0305] Here, the separation membrane sheet 122 is folded with the first electrode 1112 fixed on the first region 1221 of the separation membrane sheet 122, and the second region 1222 of the separation membrane (separation membrane sheet 122) covers the first electrode 11. In addition, the separation membrane sheet 122 is folded with the second electrode 1122 fixed on the second region 1222 of the separation membrane sheet 122, and the first region 1221 of the separation membrane sheet 122 covers the second electrode 1122.

[0306] In particular, in the electrode assembly 10 according to this embodiment, the electrodes 11 may be stacked one by one on the first region 1221 or the second region 1222 of the separator sheet 122. In this case, the electrodes 11 may be stacked in accurate positions on the separator sheet 122 after measuring whether there is any misalignment and correcting the position as necessary. As a result, the electrode assembly 10 according to this embodiment can further improve the alignment between the electrodes 11 and the separator sheet 122.

[0307] Here, an adhesive layer 1700 is formed between the electrode 11 and the separator sheet 122. More specifically, the adhesive layer 1700 includes a first adhesive layer 1710 and a second adhesive layer 1750. The first adhesive layer 1710 may be located between the lower part of the electrode 11 and the separator sheet 122, and the second adhesive layer 1750 may be located between the upper part of the electrode 11 and the separator sheet 122.

[0308] As an example, the first adhesive layer 1710 and the second adhesive layer 1750 may each be formed by applying adhesive in the shape of a plurality of dots. However, as previously described in the battery cell manufacturing apparatuses 1, 2, 3, and 3a, the shapes of the first adhesive layer 1710 and the second adhesive layer 1750 are not limited thereto, and may be formed in various shapes.

[0309] As a result, in the electrode assembly 10 according to this embodiment, an adhesive layer 1700 is formed between the electrode 11 and the separator sheet 122, and even in the case of a low-cost separator with excessively low adhesive strength, the electrode 11 and the separator can be stably fixed to each other, preventing the electrode 11 from coming off from the normal position. In addition, in the electrode assembly 10 according to this embodiment, one separator sheet 122 is folded to cover the upper and lower parts of the electrode 11, thereby further improving the alignment of the electrode 11 and process efficiency.

[0310] In addition, since there is no need to perform a lamination process as in the past, the rate of defects in the process caused by high heat and pressure can be reduced. Also, since the laminator can be eliminated, the volume of the manufacturing equipment can be reduced and the manufacturing process can be simplified.

[0311] FIG. 31 is an exploded perspective view of a battery cell according to one embodiment of the present invention.

[0312] 30 and 31, a battery cell according to another embodiment of the present invention is a battery cell including the electrode assembly 10 described above, and includes a battery case 50 that houses the electrode assembly 10 together with an electrolyte, and an adhesive layer 1700 dissolves in the electrolyte.

[0313] Here, a fixing member such as a fixing tape 30 may be attached to the outer surface of the electrode assembly 10. This makes it possible to maintain the stacked alignment of the electrode 11 and the separator sheet 122.

[0314] The electrode assembly 10 with the fixing tape 30 attached thereto can be referred to as the final electrode assembly 20.

[0315] The battery case 50 includes a receiving section 60 in which the electrode assembly 10 or the final electrode assembly 20 is attached, and a sealing section 70 that seals the outer periphery of the receiving section 60. As an example, the battery case 50 may be a laminate sheet including a resin layer and a metal layer. More specifically, the battery case 50 is made of a laminate sheet and may be composed of an outer resin layer forming the outermost corner, a barrier metal layer that prevents penetration of a substance, and an inner resin layer for sealing.

[0316] Furthermore, the receiving portion 60 of the battery case 50 may receive an electrolyte together with the electrode assembly 10. Here, the adhesive layer 1700 included in the electrode assembly 10 may dissolve in the electrolyte. In particular, in the battery cell according to this embodiment, the adhesive layer 1700 included in the electrode assembly 10 may dissolve in the electrolyte under high temperature and / or pressure conditions in an activation process such as a formation process.

[0317] More specifically, in the battery cell according to this embodiment, when the adhesive layer 1700 formed between the electrode 11 of the electrode assembly 10 and the separator sheet 122 dissolves in the electrolyte, there may be little or no adhesive 14 remaining on the surface of the electrode 11.

[0318] In contrast, since the separator sheet 122 is generally a porous sheet, a part of the adhesive 14 may permeate into the separator sheet 122. However, even in the case of the adhesive layer 1700 permeated into the separator sheet 122, it may be dissolved almost entirely or completely in the electrolyte, and during this process, traces of the adhesive layer 1700 may remain on the separator sheet 122.

[0319] Here, the application mark of the adhesive layer 1700 means that the adhesive component contained in the adhesive layer 1700 does not remain, but a part of the outer surface of the separation membrane sheet 122 is deformed by the adhesive layer 1700. However, it is not limited thereto, and the application mark of the adhesive layer 1700 means a mark where the presence or absence of the adhesive is confirmed in various ways, such as a mark where the presence or absence of the adhesive is confirmed by visual inspection. Thus, the application mark of the adhesive layer 1700 formed on the separation membrane sheet 122 may be formed in the same position as the position where the adhesive is applied.

[0320] As a result, in the battery cell according to this embodiment, the adhesive layer 1700 is completely dissolved on the surface of the electrode 11 or the separator (separator sheet 122), and there is no unreacted area due to the adhesive layer 1700, so that performance degradation is prevented and excellent battery performance can be realized.

[0321] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also belong to the scope of the present invention. [Explanation of symbols]

[0322] 1, 1a, 2, 3, 3a: Battery cell manufacturing equipment 11: Electrode 16, 16a: Table 17: Nozzle 111: First electrode reel 112: Second electrode reel 121: Separation membrane reel 122: Separation membrane sheet 125:Separation Membrane Guide 125a: Upper separation membrane guide 125b: Lower separation membrane guide 1125: Recess 130: Pressure roller 1130: Recess 131: First cutter 132: Second cutter 141:First transfer device 142:Second transfer device 151: First header 152: Second header 171, 171a: first upper nozzle 172, 172a: second upper nozzle 1111: First electrode sheet 1112: 1st electrode 1121: Second electrode sheet 1122:Second electrode 1221:First area 1222:Second area 1710: 1st adhesive layer 1750:Second adhesive layer

Claims

1. an electrode reel from which an electrode sheet on which a plurality of electrodes are formed is wound; a separation membrane reel that, when the electrode is placed, folds and covers the electrode, and unrolls a separation membrane sheet to be laminated with the electrode; A table on which the electrodes and the separation membrane sheet are placed; A pair of separation membrane guides for guiding the folding direction of the separation membrane sheet; a pair of upper nozzles that apply adhesive to at least a portion of the separator membrane sheet that passes between the pair of separator membrane guides.

2. Of the pair of separation membrane guides, a first separation membrane guide that guides the separation membrane sheet to which the adhesive is applied includes at least one recess, The battery cell manufacturing apparatus according to claim 1 , wherein the recess is provided at a position corresponding to the adhesive applied to the separator sheet.

3. The battery cell manufacturing apparatus according to claim 2 , wherein the adhesive is applied in a dotted or linear pattern along the length of the separator sheet.

4. The pair of upper nozzles can rotate to apply the adhesive to at least a portion of the electrode placed on the table; The battery cell manufacturing apparatus according to claim 1 , wherein the pair of separation membrane guides and the pair of upper nozzles move linearly back and forth to the left and right with respect to the table, and the table is fixed.

5. The electrode reel includes: a first electrode reel from which a first electrode sheet on which a plurality of first electrodes are formed is unwound; and a second electrode reel from which a second electrode sheet on which the plurality of second electrodes are formed is unwound.

6. the pair of top nozzles includes a first top nozzle and a second top nozzle, The first upper nozzle applies the adhesive to the separation membrane sheet passing through the upper portion of the first electrode or the pair of separation membrane guides, The battery cell manufacturing apparatus according to claim 5 , wherein the second upper nozzle applies the adhesive to an upper portion of the second electrode or to the separator sheet passing through the pair of separator guides.

7. The battery cell manufacturing apparatus according to claim 6 , wherein the first upper nozzle and the second upper nozzle are disposed on either side of the pair of separation membrane guides.

8. The first electrode is placed on a first region of the separation membrane sheet, The battery cell manufacturing apparatus according to claim 6 , wherein the second electrode is placed on a second region of the separator sheet.

9. When the first electrode is placed on the first region of the separation membrane sheet, the first upper nozzle moves linearly onto the first electrode, The battery cell manufacturing apparatus of claim 8 , wherein when the second electrode is placed on the second region of the separator sheet, the second upper nozzle moves linearly onto the second electrode.

10. When the first upper nozzle applies the adhesive to at least a portion of the upper surface of the first electrode, the first separation membrane guide moves linearly in a direction in which the separation membrane sheet covers the first electrode, 10. The battery cell manufacturing apparatus of claim 9, wherein when the second upper nozzle applies the adhesive to at least a portion of the upper surface of the second electrode, the first separator guide moves linearly in a direction in which the separator sheet covers the second electrode.

11. The battery cell manufacturing apparatus of claim 8 , further comprising a lower nozzle configured to apply the adhesive to a lower portion of the first electrode and a lower portion of the second electrode, respectively.

12. a first header that adsorbs the first electrode and places it on the first region; The battery cell manufacturing apparatus of claim 11 , further comprising: a second header that adsorbs and places the second electrode in the second region.

13. When the first electrode is attached to the first header, the lower nozzle applies the adhesive to a lower portion of the first electrode, The battery cell manufacturing apparatus of claim 12 , wherein when the second electrode is attracted to the second header, the lower nozzle applies the adhesive to a lower portion of the second electrode.

14. a first transport device that transports the first electrode toward the table; The battery cell manufacturing apparatus of claim 11 , further comprising: a second transfer device that transfers the second electrode toward the table.

15. the first transfer device includes a first groove that is open toward the first electrode, and the lower nozzle applies the adhesive to a lower portion of the first electrode through the first groove; 15. The battery cell manufacturing apparatus of claim 14, wherein the second transfer device includes a second groove that is open toward the second electrode, and the lower nozzle applies the adhesive to a lower portion of the second electrode through the second groove.

16. The electrode reel includes: a first electrode reel from which a first electrode sheet on which a plurality of first electrodes are formed is unwound; a second electrode reel from which a second electrode sheet on which a plurality of second electrodes are formed is unwound; the table rotates and reciprocates between the first electrode reel and the second electrode reel, The battery cell manufacturing apparatus according to claim 1 , wherein the pair of separation membrane guides and the pair of upper nozzles linearly reciprocate left and right with respect to the table.

17. The first electrode is placed on a first region of the separation membrane sheet, The battery cell manufacturing apparatus of claim 16 , wherein the second electrode is placed on a second region of the separator sheet.

18. the pair of top nozzles includes a first top nozzle and a second top nozzle, The first upper nozzle applies the adhesive to at least a portion of the second region of the separation membrane sheet passing between the pair of separation membrane guides, The battery cell manufacturing apparatus according to claim 17 , wherein the second upper nozzle applies the adhesive to at least a portion of the first region of the separator membrane sheet passing between the pair of separator membrane guides.

19. 20. The battery cell manufacturing apparatus of claim 18, wherein when the pair of upper nozzles apply the adhesive on the separation membrane sheet, the outlet of the first upper nozzle or the outlet of the second upper nozzle rotates in a direction adjacent to the separation membrane sheet.

20. The battery cell manufacturing apparatus of claim 18 , wherein the first upper nozzle and the second upper nozzle are disposed on either side of the pair of separation membrane guides.

21. The first electrode is placed on a first region of the separation membrane sheet, and the first upper nozzle is moved linearly in a direction away from the table on a second region of the separation membrane sheet, 20. The battery cell manufacturing apparatus of claim 18, wherein the second electrode is placed on the second region of the separator membrane sheet and the second upper nozzle moves linearly in a direction away from the table over the first region of the separator membrane sheet.

22. The first upper nozzle applies the adhesive to at least a portion of the second region of the separation membrane sheet, and the pair of separation membrane guides move linearly in a direction toward the second electrode reel, 22. The battery cell manufacturing apparatus of claim 21, wherein the second upper nozzle applies the adhesive to at least a portion of the first region of the separator membrane sheet while the pair of separator membrane guides move linearly in a direction toward the first electrode reel.

23. When the application of the adhesive by the first upper nozzle is completed, the pair of separation membrane guides move linearly in a direction in which the second region of the separation membrane sheet on which the adhesive is applied covers the first electrode, 23 . The battery cell manufacturing apparatus of claim 22 , wherein when the adhesive application by the second upper nozzle is completed, the pair of separation membrane guides move linearly in a direction in which the first region of the separation membrane sheet to which the adhesive is applied covers the second electrode.

24. The battery cell manufacturing apparatus of claim 17 , further comprising a lower nozzle configured to apply the adhesive to a lower portion of the first electrode and a lower portion of the second electrode, respectively.

25. a first header that adsorbs the first electrode and places it on the first region; a second header for adsorbing the second electrode and placing it on the second region, The battery cell manufacturing apparatus of claim 24 , wherein the first header and the second header rotate and reciprocate in a direction in which they are positioned above the table.

26. When the first electrode is attached to the first header, the lower nozzle applies the adhesive to a lower portion of the first electrode, The battery cell manufacturing apparatus of claim 25 , wherein when the second electrode is attracted to the second header, the lower nozzle applies the adhesive to a lower portion of the second electrode.

27. a first transport device that transports the first electrode toward the table; The battery cell manufacturing apparatus of claim 24 , further comprising: a second transfer device that transfers the second electrode toward the table.

28. the first transfer device includes a first groove that is open toward the first electrode, and the lower nozzle applies the adhesive to a lower portion of the first electrode through the first groove; 28. The battery cell manufacturing apparatus of claim 27, wherein the second transfer device includes a second groove that is open toward the second electrode, and the lower nozzle applies the adhesive to a lower portion of the second electrode through the second groove.

29. The pair of upper nozzles can rotate to apply the adhesive to at least a portion of the electrode placed on the table; The battery cell manufacturing apparatus according to claim 1 , further comprising a pair of pressure rollers that apply pressure to the separator membrane sheet guided by the pair of separator membrane guides.

30. the pressure roller includes at least one recess on a surface thereof; The battery cell manufacturing apparatus according to claim 29 , wherein the recess is provided at a position corresponding to the adhesive applied to the separator sheet.

31. The battery cell manufacturing apparatus of claim 30 , wherein the at least one pressure roller is located between the pair of separation film guides and the table.

32. The battery cell manufacturing apparatus of claim 31 , wherein the at least one pressure roller is located between the pair of separator film guides.

33. The electrode reel includes: a first electrode reel from which a first electrode sheet on which a plurality of first electrodes are formed is unwound; a second electrode reel from which a second electrode sheet on which the plurality of second electrodes are formed is unwound.

34. a first transport device that transports the first electrode toward the table; 34. The battery cell manufacturing apparatus of claim 33, further comprising: a second transfer device that transfers the second electrode toward the table.

35. the pair of top nozzles includes a first top nozzle and a second top nozzle, The battery cell manufacturing apparatus of claim 33 , wherein the pair of upper nozzles apply the adhesive to the separator sheet or the electrode located on the table, respectively.

36. The battery cell manufacturing apparatus of claim 35 , wherein the first upper nozzle and the second upper nozzle are disposed on either side of the separation membrane guide.

37. the at least one pressure roller includes a first pressure roller and a second pressure roller; The battery cell manufacturing apparatus of claim 36 , wherein the first pressure roller is positioned between the first upper nozzle and the separation membrane guide, and the second pressure roller is positioned between the second upper nozzle and the separation membrane guide.

38. The first electrode is placed on a first region of the separation membrane sheet, The battery cell manufacturing apparatus of claim 34 , wherein the second electrode is placed on a second region of the separator sheet.

39. a first header that adsorbs the first electrode and places it on the first region; The battery cell manufacturing apparatus of claim 38 , further comprising: a second header that adsorbs and places the second electrode in the second region.

40. The pair of separation membrane guides, the pair of upper nozzles, and the at least one pressure roller are fixed, 40. The battery cell manufacturing apparatus of claim 38, wherein the table reciprocates linearly toward the first transfer device and the second transfer device.

41. The table is fixed, The battery cell manufacturing apparatus of claim 38 , wherein the pair of separation film guides, the pair of upper nozzles, and the at least one pressure roller linearly reciprocate toward the first transfer device and the second transfer device.

42. The battery cell manufacturing apparatus of claim 40 , further comprising a moving box that houses the pair of separation membrane guides and the pair of upper nozzles therein.

43. cutting the first electrode sheet unwound from the first electrode reel to form a plurality of first electrodes; A first upper nozzle applies adhesive to a first region of a separation membrane sheet unwound from a separation membrane reel between a pair of separation membrane guides, and the separation membrane sheet is placed on a table along the separation membrane guides; placing the first electrode on a first region of the separation membrane sheet; the first upper nozzle applying the adhesive to a top of the first electrode; folding the separator sheet in a folding direction guided by the separator guide, so that a second region of the separator sheet covers the first electrode.

44. Prior to the step of placing the first electrode on the first region of the separation membrane sheet, 44. The method of claim 43, further comprising applying the adhesive to a bottom of the first electrode with a bottom nozzle.

45. After the step of covering the top of the first electrode, cutting the second electrode sheet unwound from the second electrode reel to form a plurality of second electrodes; a lower nozzle applying the adhesive to a lower portion of the second electrode; placing the second electrode on a second region of the separation membrane sheet; a second upper nozzle applying the adhesive to a top of the second electrode; 44. The method of claim 43, further comprising: folding the separator sheet in a folding direction guided by the separator guide, so that the first region of the separator sheet covers the second electrode.

46. The table is fixed, The method of claim 45 , wherein the pair of separation membrane guides, the first upper nozzle, and the second upper nozzle linearly reciprocate with respect to the table.

47. cutting the first electrode sheet unwound from the first electrode reel to form a plurality of first electrodes; A step of placing a separation membrane sheet unwound from a separation membrane reel on a table along a pair of separation membrane guides; a lower nozzle applying adhesive to a lower portion of the first electrode; placing the first electrode on a first region of the separation membrane sheet; A first upper nozzle applies the adhesive to at least a portion of the second region of the separation membrane sheet between the pair of separation membrane guides; folding the separator sheet in a folding direction guided by the separator guide, so that the second region of the separator sheet to which the adhesive is applied covers the first electrode.

48. After the step of covering the top of the first electrode, cutting the second electrode sheet unwound from the second electrode reel to form a plurality of second electrodes; a lower nozzle applying the adhesive to a lower portion of the second electrode; placing the second electrode on a second region of the separation membrane sheet; A second upper nozzle applies the adhesive to at least a portion of the first region of the separation membrane sheet between the pair of separation membrane guides; 50. The method of claim 47, further comprising folding the separator sheet in a folding direction guided by the separator guide, so that the first region of the separator sheet to which the adhesive is applied covers the second electrode.

49. the table rotates and reciprocates between the first electrode reel and the second electrode reel, The method of claim 48 , wherein the separation membrane guide, the first upper nozzle, and the second upper nozzle linearly reciprocate left and right based on the table.

50. In the step of applying the adhesive by the first top nozzle and the step of applying the adhesive by the second top nozzle, The method of claim 49 , wherein the outlet of the first upper nozzle or the outlet of the second upper nozzle rotates in a direction adjacent to the separator sheet.

51. cutting the first electrode sheet unwound from the first electrode reel to form a plurality of first electrodes; A first upper nozzle applies adhesive to a first region of a separation membrane sheet unwound from a separation membrane reel between a pair of separation membrane guides, and the separation membrane sheet is placed on a table along the separation membrane guides; placing the first electrode on a first region of the separation membrane sheet; a first upper nozzle applying the adhesive to a top of the first electrode; The separation membrane sheet is folded in a folding direction guided by the separation membrane guide, so that a second region of the separation membrane sheet covers the first electrode; a first pressure roller presses the separator membrane sheet guided by the separator membrane guide.

52. After the step of covering the top of the first electrode, cutting the second electrode sheet unwound from the second electrode reel to form a plurality of second electrodes; A second upper nozzle applies the adhesive to a second region of the separation membrane sheet between the pair of separation membrane guides; placing the second electrode on a second region of the separation membrane sheet; the second upper nozzle applying the adhesive to a top of the second electrode; The separation membrane sheet is folded in a folding direction guided by the separation membrane guide, and a first region of the separation membrane sheet covers the second electrode, The battery cell manufacturing method according to claim 51 , wherein a second pressure roller presses the separator membrane sheet guided by the separator membrane guide.

53. the separation membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller are fixed, 53. The battery cell manufacturing method of claim 52, wherein the table reciprocates linearly toward the first transfer device and the second transfer device.

54. The table is fixed, 54. The method of claim 53, wherein the separation membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller linearly reciprocate toward the first transfer device and the second transfer device.

55. Of the pair of separation membrane guides, a first separation membrane guide that guides the separation membrane sheet to which the adhesive is applied includes at least one recess, 52. The battery cell manufacturing method according to claim 43, claim 47, or claim 51, wherein the recess is provided at a position corresponding to the adhesive applied to the separator sheet.

56. 56. The method of claim 55, wherein the adhesive is applied in a dotted or linear pattern along the length of the separator sheet.

57. the first pressure roller includes at least one recess in a surface thereof; The battery cell manufacturing method according to claim 51 , wherein the recess is provided at a position corresponding to the adhesive applied to the separator sheet.

58. An electrode assembly manufactured by the method for manufacturing a battery cell according to any one of claims 43, 47, and 51, in which electrodes and separator sheets are alternately stacked, The electrodes include a first electrode and a second electrode, The separation membrane sheet has a zigzag shape formed by folding at least two times, the separation membrane sheet is folded with the first electrode fixed on the first region of the separation membrane sheet, the second region of the separation membrane sheet covers the first electrode, the separation membrane sheet is folded with the second electrode fixed on the second region, the first region of the separation membrane sheet covers the second electrode, an adhesive layer formed between the electrode and the separator sheet,

59. The adhesive layer includes a first adhesive layer and a second adhesive layer, The first adhesive layer is located between the lower part of the electrode and the separator sheet, 60. The electrode assembly of claim 58, wherein the second adhesive layer is located between a top of the electrode and the separator sheet.

60. 60. The electrode assembly of claim 59, wherein the first adhesive layer and the second adhesive layer are each formed by applying adhesive in a plurality of dot shapes.

61. 59. A battery cell including the electrode assembly of claim 58, a battery case that houses the electrode assembly together with an electrolyte; The adhesive layer dissolves in the electrolyte.

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