Battery Cell, The Apparatus For Manufacturing The Same And The Method For Manufacturing The Same

Abstract

A battery cell manufacturing apparatus according to an embodiment of the present invention comprises: an electrode reel from which an electrode sheet having a plurality of electrodes formed thereon is unwound; a separator reel from which a separator sheet is unwound that is folded when the electrode is placed thereon to cover the electrode and laminate with the electrode; a table on which the electrode and the separator sheet are placed on an upper surface; a pair of separator guides that guide the folding direction of the separator sheet; and a pair of upper nozzles that apply an adhesive to at least a portion of the separator sheet passing between the pair of separator guides.

Description

Technology Field

[0001] The present invention relates to a battery cell, an apparatus for manufacturing the same, and a method for manufacturing the same. More specifically, the invention relates to a battery cell in which an electrode and a separator sheet are laminated in a Z-folding manner, wherein the electrode can be prevented from deviating from its proper position, an apparatus for manufacturing the same, and a method for manufacturing the same. Background Technology

[0002] Generally, types of secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and lithium-ion polymer batteries. These secondary batteries are used not only in small products such as digital cameras, P-DVDs, MP3 players, mobile phones, PDAs, portable game devices, power tools, and E-bikes, but also in large products requiring high output such as electric vehicles and hybrid vehicles, as well as in power storage devices and backup power storage devices that store surplus generated power or renewable energy.

[0003] To manufacture such a secondary battery, first, an electrode active material slurry is applied to a positive electrode current collector and a negative electrode current collector to produce a positive electrode and a negative electrode, and then an electrode assembly of a predetermined shape is formed by stacking them on both sides of a separator. Then, the electrode assembly is placed in a battery case, and after injecting an electrolyte, it is sealed.

[0004] Electrode assemblies are classified into various types. For example, there are the Simple Stack Type, in which anodes, separators, and cathodes are simply stacked alternately without manufacturing unit cells; the Lamination & Stack Type (L&S), in which unit cells are manufactured first using anodes, separators, and cathodes, and then these unit cells are stacked; the Stack & Folding Type (S&F), in which multiple unit cells are attached spaced apart on one side of a separator sheet that is elongated on one side, and the separator sheet is repeatedly folded in the same direction from one end; and the Z-Folding Type, in which multiple electrodes or unit cells are alternately attached to one side and the other side of a separator sheet that is elongated on one side, and the method of folding the separator sheet in a specific direction from one end and then folding it in the opposite direction is repeated alternately. Among these, the Z-Folding Type is frequently used recently due to its high alignment and electrolyte impregnation.

[0005] However, conventionally, after laminating the electrode and separator sheet in this Z-folding manner, a separate laminating process was not performed. Consequently, the electrode and separator sheet did not adhere to each other, leading to a problem where the electrode deviated from its proper position. To resolve this, a separate laminating process was performed after laminating the electrode and separator sheet; however, since the overall thickness of the laminate increased, heat could not be transferred to the interior of the laminate, resulting in reduced adhesion. Furthermore, there was also a problem where the electrode deviated from its proper position during the transport of the laminate to perform this separate laminating process. Depending on the material of the separator sheet, this problem was exacerbated when the separator sheet itself had low adhesion.

[0006] Accordingly, it is necessary to develop a battery cell including a Z-folding electrode assembly that improves battery cell performance while preventing the electrode from deviating from its position, an apparatus for manufacturing the same, and a method for manufacturing the same. The problem to be solved

[0007] The problem to be solved by the present invention is to provide a battery cell in which an electrode and a separator sheet are laminated in a Z-folding manner, thereby preventing the electrode from deviating from its proper position, an apparatus for manufacturing the same, and a method for manufacturing the same.

[0008] The problems that the present invention aims to solve are not limited to those described above, and problems not mentioned will be clearly understood by those skilled in the art from this specification and the attached drawings. means of solving the problem

[0009] A battery cell manufacturing apparatus according to embodiments of the present invention may include: an electrode reel from which an electrode sheet having a plurality of electrodes formed thereon is unwound; a separator reel from which a separator sheet that covers the electrode and is laminated with the electrode is unwound when the electrode is placed thereon is folded; a table on which the electrode and the separator sheet are placed on an upper surface; a pair of separator guides that guide the folding direction of the separator sheet; and a pair of upper nozzles that apply an adhesive to at least a portion of the separator sheet passing between the pair of separator guides.

[0010] Among the above pair of separator guides, the first separator guide that guides the separator sheet coated with the adhesive includes at least one concave portion, and the concave portion may be provided at a position corresponding to the adhesive coated on the separator sheet.

[0011] The adhesive can be applied in a dot or line shape along the length direction of the separator sheet.

[0012] The above pair of upper nozzles can rotate to apply adhesive to at least a portion of the electrode seated on the table, and the above pair of separator guides and the above pair of upper nozzles move in a linear reciprocating motion left and right relative to the table, and the table may be fixed.

[0013] The electrode reel may include a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound.

[0014] The above pair of upper nozzles includes a first upper nozzle and a second upper nozzle, the first upper nozzle may apply the adhesive to the upper part of the first electrode or to the separator sheet passing through the pair of separator guides, and the second upper nozzle may apply the adhesive to the upper part of the second electrode or to the separator sheet passing through the pair of separator guides.

[0015] The first upper nozzle and the second upper nozzle may be positioned on both sides with the pair of membrane guides in between.

[0016] The first electrode may be placed on a first region of the separator sheet, and the second electrode may be placed on a second region of the separator sheet.

[0017] When the first electrode is placed on the first region of the separator sheet, the first upper nozzle moves linearly on the first electrode, and when the second electrode is placed on the second region of the separator sheet, the second upper nozzle can move linearly on the second electrode.

[0018] When the first upper nozzle applies the adhesive to at least a portion of the upper part of the first electrode, the first separator guide moves linearly in the direction in which the separator 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 separator guide can move linearly in the direction in which the separator sheet covers the second electrode.

[0019] It may include a lower nozzle that applies the adhesive to the lower part of the first electrode and the lower part of the second electrode, respectively.

[0020] It may further include a first header that adsorbs the first electrode and settles it in the first region; and a second header that adsorbs the second electrode and settles it in the second region.

[0021] When the first electrode is adsorbed to the first header, the lower nozzle can apply the adhesive to the lower part of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle can apply the adhesive to the lower part of the second electrode.

[0022] The apparatus may further include a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table.

[0023] The first transfer device includes a first groove open toward the first electrode, so that the lower nozzle applies the adhesive to the lower part of the first electrode through the first groove, and the second transfer device includes a second groove open toward the second electrode, so that the lower nozzle applies the adhesive to the lower part of the second electrode through the second groove.

[0024] The electrode reel comprises a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound; the table rotates back and forth between the first electrode reel and the second electrode reel, and the pair of separator guides and the pair of upper nozzles can move in a straight line back and forth relative to the table.

[0025] The first electrode may be placed on a first region of the separator sheet, and the second electrode may be placed on a second region of the separator sheet.

[0026] The above pair of upper nozzles includes a first upper nozzle and a second upper nozzle, the first upper nozzle can apply the adhesive to at least a portion of a second region of the separator sheet passing between the pair of separator guides, and the second upper nozzle can apply the adhesive to at least a portion of a first region of the separator sheet passing between the pair of separator guides.

[0027] When the above pair of upper nozzles each apply adhesive to the separator sheet, the discharge port of the first upper nozzle or the discharge port of the second upper nozzle can rotate in a direction adjacent to the separator sheet.

[0028] The first upper nozzle and the second upper nozzle may be positioned on both sides with the pair of membrane guides in between.

[0029] At the same time as the first electrode is seated on the first region of the separator sheet, the first upper nozzle moves linearly away from the table on the second region of the separator sheet, and at the same time as the second electrode is seated on the second region of the separator sheet, the second upper nozzle can move linearly away from the table on the first region of the separator sheet.

[0030] At the same time as the first upper nozzle applies the adhesive to at least a portion of the second region of the separator sheet, the pair of separator guides can move linearly toward the second electrode reel, and at the same time as the second upper nozzle applies the adhesive to at least a portion of the first region of the separator sheet, the pair of separator guides can move linearly toward the first electrode reel.

[0031] When the adhesive application of the first upper nozzle is completed, the pair of separator guides can move in a straight line in a direction such that the second region of the separator sheet to which the adhesive is applied covers the first electrode, and when the adhesive application of the second upper nozzle is completed, the pair of separator guides can move in a straight line in a direction such that the first region of the separator sheet to which the adhesive is applied covers the second electrode.

[0032] It may include a lower nozzle that applies the adhesive to the lower part of the first electrode and the lower part of the second electrode, respectively.

[0033] The apparatus further includes a first header that adsorbs the first electrode and settles it in the first region; and a second header that adsorbs the second electrode and settles it in the second region, wherein the first header and the second header can rotate and reciprocate in a direction located on the table.

[0034] When the first electrode is adsorbed to the first header, the lower nozzle can apply the adhesive to the lower part of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle can apply the adhesive to the lower part of the second electrode.

[0035] The apparatus may further include a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table.

[0036] The first transfer device includes a first groove open toward the first electrode, so that the lower nozzle applies the adhesive to the lower part of the first electrode through the first groove, and the second transfer device includes a second groove open toward the second electrode, so that the lower nozzle applies the adhesive to the lower part of the second electrode through the second groove.

[0037] The above pair of upper nozzles can rotate to apply adhesive to at least a portion of the electrode seated on the table, and may include a pair of pressure rollers that press the separator sheet guided by the above pair of separator guides.

[0038] The above-mentioned pressure roller includes at least one concave portion on its surface, and the concave portion may be provided at a position corresponding to the adhesive applied to the separator sheet.

[0039] The above at least one pressure roller may be located between the above pair of membrane guides and the table.

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

[0041] The electrode reel may include a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound.

[0042] The apparatus may further include a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table.

[0043] The above pair of upper nozzles includes a first upper nozzle and a second upper nozzle, and

[0044] The above pair of upper nozzles can each apply adhesive to the separator sheet or the electrode located on the table.

[0045] The first upper nozzle and the second upper nozzle may be positioned on both sides with the membrane guide in between.

[0046] The above at least one pressure roller includes a first pressure roller and a second pressure roller, the first pressure roller is located between the first upper nozzle and the membrane guide, and the second pressure roller may be located between the second upper nozzle and the membrane guide.

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

[0048] It may further include a first header that adsorbs the first electrode and settles it in the first region; and a second header that adsorbs the second electrode and settles it in the second region.

[0049] The above pair of membrane guides, the above pair of upper nozzles, and the above at least one pressure roller are fixed, and the table can move in a straight reciprocating motion toward the first transfer device and the second transfer device.

[0050] The table is fixed, and the pair of separator guides, the pair of upper nozzles, and the at least one pressure roller can move in a straight reciprocating motion toward the first transfer device and the second transfer device.

[0051] It may further include a moving box that accommodates the above pair of separator guides and the above pair of upper nozzles inside.

[0052] Additionally, a method for manufacturing a battery cell according to embodiments 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; applying an adhesive to a first area of ​​a separator sheet unwound from a separator reel between a pair of separator guides, and placing the separator sheet on a table along the separator guides; placing the first electrode on the first area of ​​the separator sheet; applying an adhesive to the upper portion of the first electrode by the first upper nozzle; and folding the separator sheet in a folding direction guided by the separator guides so that a second area of ​​the separator sheet covers the first electrode.

[0053] Prior to the step of seating the first electrode in the first region of the separator sheet, the method may further include the step of applying an adhesive to the lower part of the first electrode using a lower nozzle.

[0054] After the step of covering the upper part of the first electrode, the method may further include the step of cutting a second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes; the step of applying an adhesive to the lower part of the second electrode with a lower nozzle; the step of seating the second electrode in a second region of the separator sheet; the step of applying an adhesive to the upper part of the second electrode with a second upper nozzle; and the step of 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.

[0055] The table is fixed, and the pair of membrane guides, the first upper nozzle, and the second upper nozzle can move in a straight reciprocating motion relative to the table.

[0056] Additionally, a method for manufacturing a battery cell according to embodiments 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 a separator sheet unwound from a separator reel on a table along a pair of separator guides; applying an adhesive to the lower portion of the first electrode using a lower nozzle; placing the first electrode on a first region of the separator sheet; applying an adhesive to at least a portion of the second region of the separator sheet between the pair of separator guides using a first upper nozzle; and folding the separator sheet in a folding direction guided by the separator guides so that the second region of the separator sheet to which the adhesive is applied covers the first electrode.

[0057] After the step of covering the upper part of the first electrode, the method may further include the step of cutting a second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes; the step of applying an adhesive to the lower part of the second electrode using a lower nozzle; the step of seating the second electrode in a second region of the separator sheet; the step of applying an adhesive to at least a part of the first region of the separator sheet between the pair of separator guides using a second upper nozzle; and the step of 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.

[0058] The table above reciprocates in rotation between the first electrode reel and the second electrode reel, and the separator guide and the pair of upper nozzles can reciprocate in a straight line from left to right relative to the table.

[0059] In the step of the first upper nozzle applying adhesive and the step of the second upper nozzle applying adhesive, the discharge port of the first upper nozzle or the discharge port of the second upper nozzle may rotate in a direction adjacent to the separator sheet.

[0060] In addition, a method for manufacturing a battery cell according to embodiments of the present invention comprises the steps of: cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; applying an adhesive between a pair of separator guides to a first region of a separator sheet unwound from a separator reel, and placing the separator sheet on a table along the separator guides; placing the first electrode on the first region of the separator sheet; applying an adhesive to the upper portion of the first electrode by the first upper nozzle; and folding the separator sheet in a folding direction guided by the separator guides so that a second region of the separator sheet covers the first electrode, and the separator sheet guided by the separator guides can be pressed by a first pressure roller.

[0061] After the step of covering the upper portion of the first electrode, the method further includes the step of cutting a second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes; the step of applying an adhesive to a second region of the separator sheet between a pair of separator guides using a second upper nozzle; the step of seating the second electrode on the second region of the separator sheet; the step of applying an adhesive to the upper portion of the second electrode using the second upper nozzle; and the step of 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, and the method may further include the step of pressing the separator sheet guided by the separator guide with a second pressure roller.

[0062] The above membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller are fixed, and the table can move in a straight reciprocating motion toward the first transfer device and the second transfer device.

[0063] The table is fixed, and the membrane guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller can move in a straight reciprocating motion toward the first transfer device and the second transfer device.

[0064] Among the above pair of separator guides, the first separator guide that guides the separator sheet coated with the adhesive includes at least one concave portion, and the concave portion may be provided at a position corresponding to the adhesive coated on the separator sheet.

[0065] The adhesive can be applied in a dot or line shape along the length direction of the separator sheet.

[0066] The above-mentioned pressure roller includes at least one concave portion on its surface, and the concave portion may be provided at a position corresponding to the adhesive applied to the separator sheet.

[0067] In addition, an electrode assembly manufactured by a battery cell manufacturing method according to embodiments of the present invention, wherein an electrode and a separator sheet are alternately stacked, wherein the electrode comprises a first electrode and a second electrode, and the separator sheet has a zigzag shape formed by folding at least twice, and the separator sheet is folded such that the first electrode is seated on a first region of the separator sheet and the second region of the separator sheet covers the first electrode, and the separator sheet is folded such that the second electrode is seated on the second region and the first region of the separator sheet covers the second electrode, and an adhesive layer may be formed between the electrode and the separator sheet.

[0068] The adhesive layer comprises a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is located between the lower part of the electrode and the separator sheet, and the second adhesive layer may be 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 form of multiple dots.

[0070] A battery cell comprising an electrode assembly according to embodiments of the present invention comprises a battery case that accommodates the electrode assembly together with an electrolyte, and the adhesive layer may be dissolved in the electrolyte. Effects of the invention

[0071] According to the embodiments, the present invention relates to a battery cell in which an electrode and a separator sheet are laminated in a Z-folding manner and an adhesive is pre-applied to the upper and lower surfaces of the electrode, an apparatus for manufacturing the same, and a method for manufacturing the same, wherein the electrode can be prevented from deviating from its proper position.

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

[0073] In addition, by stacking the electrodes and separators in a zigzag pattern and performing a press 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 unmentioned effects will be clearly understood by those skilled in the art from this specification and the accompanying drawings. Brief explanation of the drawing

[0075] FIG. 1 is a flowchart of a method for manufacturing a battery cell according to one embodiment of the present invention. FIG. 2 is a schematic diagram showing an adhesive being applied to a first region of a separator sheet in a battery cell manufacturing apparatus according to one embodiment of the present invention. FIG. 3 is a schematic diagram showing the first electrode being placed in the first region of the separator sheet in the battery cell manufacturing device of FIG. 2. FIG. 4 is a schematic diagram showing the application of adhesive to the lower part of the first electrode in the battery cell manufacturing apparatus of FIG. 2. FIG. 5 is a schematic diagram showing a modified example of applying adhesive to the lower part of the first electrode of FIG. 4. FIG. 6 is a schematic diagram showing the first upper nozzle moving in a straight line and applying adhesive to the upper part of the first electrode in the battery cell manufacturing device of FIG. 2. FIG. 7 is a schematic diagram showing the separator guide moving in a straight line and the second electrode being placed on the second region of the separator sheet in the battery cell manufacturing device of FIG. 2. FIG. 8 is a schematic diagram showing the second upper nozzle moving in a straight line and applying adhesive to the upper part of the second electrode in the battery cell manufacturing device of FIG. 2. FIG. 9 is a flowchart of a method for manufacturing a battery cell according to another embodiment of the present invention. FIG. 10 is a schematic diagram showing a first electrode being placed in a first region of a separator sheet in a battery cell manufacturing device according to another embodiment of the present invention. FIG. 11 is a schematic diagram showing the application of adhesive to the lower part of the first electrode in the battery cell manufacturing apparatus of FIG. 10. FIG. 12 is a schematic diagram showing a modified example of applying adhesive to the lower part of the first electrode of FIG. 11. FIGS. 13 and 14 are schematic diagrams showing the appearance of a battery cell manufacturing device of FIG. 10 in which a table rotates and moves, while a separator guide and a first upper nozzle move linearly and the first upper nozzle rotates and applies adhesive to a second area. FIG. 15 is a schematic diagram showing the appearance of a second region coated with adhesive covering a first electrode as the separator guide moves in a straight line in the opposite direction in the battery cell manufacturing apparatus of FIG. 10. FIG. 16 is a schematic diagram showing the second electrode being placed in the second region of the separator sheet in the battery cell manufacturing apparatus of FIG. 10. FIG. 17 is a flowchart of a method for manufacturing a battery cell according to another embodiment of the present invention. FIG. 18 is a schematic diagram showing an adhesive being applied to a first area of ​​a separator sheet as the table moves in a straight line in a battery cell manufacturing apparatus according to another embodiment of the present invention. FIG. 19 is a schematic diagram showing the first electrode being placed in the first region of the separator sheet in the battery cell manufacturing device of FIG. 18. FIG. 20 is a schematic diagram showing the application of adhesive to the upper part of the first electrode as the table moves in a straight line in the battery cell manufacturing apparatus of FIG. 18. FIG. 21 is a schematic diagram showing the application of adhesive to a second region of a separator sheet as the table moves in a straight line in the battery cell manufacturing apparatus of FIG. 18. FIG. 22 is a schematic diagram showing the second electrode being placed in the second region of the separator sheet in the battery cell manufacturing device of FIG. 18. FIG. 23 is a schematic diagram showing a battery cell manufacturing device with some modifications to the battery cell manufacturing device of FIG. 18, in which an adhesive is applied to a first area of ​​a separator sheet as the first upper nozzle moves in a straight line. FIG. 24 is a schematic diagram showing the first electrode being placed in the first region of the separator sheet in the battery cell manufacturing apparatus of FIG. 23. FIG. 25 is a schematic diagram showing the application of adhesive to the upper part of the first electrode as the first upper nozzle moves in a straight line in the battery cell manufacturing device of FIG. 23. FIG. 26 is a schematic diagram showing that in the battery cell manufacturing apparatus of FIG. 23, an adhesive is applied to a second region of a separator sheet as the second upper nozzle moves in a straight line, and a second electrode is placed on the second region of the separator sheet. FIG. 27 is a schematic diagram showing one embodiment of a lower membrane guide according to the present invention. FIG. 28 is a schematic diagram showing one embodiment of a pressure roller according to the present invention. FIG. 29 is a schematic diagram showing one embodiment of a pressure jig according to the present invention. FIG. 30 is a cross-sectional view of an electrode assembly according to embodiments of the present invention. FIG. 31 is an exploded perspective view of a battery cell according to embodiments of the present invention. Specific details for implementing the invention

[0076] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0077] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0078] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0079] Furthermore, throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0080] In addition, since the upper / lower surface or upper / lower surface of a specific member may be determined differently depending on which direction is used as the reference, throughout the specification, “upper surface” and “lower surface” refer to two surfaces facing each other on the z-axis of the member, and “upper surface” and “lower surface” are defined as being located in opposite directions on the z-axis of the member.

[0081] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0083] Hereinafter, a method and apparatus for manufacturing a battery cell according to one embodiment of the present invention will be described.

[0084] FIG. 1 is a flowchart of a method for manufacturing a battery cell according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing an adhesive being applied to a first region of a separator sheet in a battery cell manufacturing apparatus according to an embodiment of the present invention. FIG. 3 is a schematic diagram showing a first electrode being placed on a first region of a separator sheet in the battery cell manufacturing apparatus of FIG. 2.

[0085] Referring to FIGS. 1, 2, and 3, a method for manufacturing a battery cell according to one embodiment of the present invention comprises the steps of: cutting electrode sheets (1111, 1121) to form an electrode (11) (S101); applying an adhesive to a separator sheet (122) and placing the separator sheet (122) with the adhesive applied on a table (16) (S102); optionally applying an adhesive to the lower part of the electrode (11) (S103); placing the electrode (11) on the separator sheet (122) (S104); applying an adhesive to the upper part of the electrode (11) (S105); and folding the separator sheet (122) to cover the electrode (11) (S106).

[0086] Accordingly, in the battery cell manufacturing method according to the present embodiment, when stacking the electrode (11) and the separator sheet (122) in a Z-folding shape, an adhesive is applied to the upper and lower parts of the electrode (11), thereby preventing the electrode (11) from deviating from its proper position.

[0088] Hereinafter, each step illustrated in the flowchart of FIG. 1 will be explained in detail with reference to FIG. 2 to FIG. 8.

[0089] The battery cell manufacturing apparatus (1) of FIG. 2 comprises: an electrode reel (111, 112) from which an electrode sheet having a plurality of electrodes (11) formed is unwound; a separator reel (121) from which a separator sheet (122) that covers the electrode (11) and is laminated with the electrode (11) is unwound when the electrode (11) is placed and folded; a table (16) on which the electrode (11) and the separator sheet (122) are placed on an upper surface; a separator guide (125) that guides the folding direction of the separator sheet (122); and a pair of upper nozzles (17) that apply an adhesive to at least a portion of the upper surface of the electrode (11) placed on the table (16).

[0090] The electrode reels (111, 112) may include a first electrode reel (111) from which a first electrode sheet (1111) having a plurality of first electrodes (1112) formed thereon is unwound; and a second electrode reel (112) from which a second electrode sheet (1121) having a plurality of second electrodes (1122) formed thereon is unwound.

[0091] The electrode reels (111, 112) are reels on which electrode sheets (1111, 1121) are wound, and the electrode sheets (1111, 1121) are unwound from the electrode reels (111, 112). Then, these electrode sheets (1111, 1121) are cut to form an electrode (11). More specifically, according to the present embodiment, the first electrode reel (111) is a reel on which the first electrode sheet (1111) is wound, and the first electrode sheet (1111) is unwound from the second electrode reel (111). Additionally, the second electrode reel (121) is a reel on which the second electrode sheet (1121) is wound, and the second electrode sheet (1121) is unwound from the second electrode reel (121).

[0092] Here, the electrode sheet (1111, 1121) can be manufactured by applying a slurry of an electrode active material, a conductive material, and a binder onto an electrode current collector, and then drying and pressing it. However, the method of manufacturing the electrode sheet (1111, 1121) is not limited thereto, and any method of manufacturing the electrode sheet (1111, 1121) generally in the relevant technical field may be included in this embodiment.

[0093] More specifically, the first electrode sheet (1111) and the second electrode sheet (1121) may include electrode active materials having different polarities. That is, the first electrode (1112) and the second electrode (1122) may be electrodes (11) having different polarities. For example, if the first electrode (1112) is a positive electrode, the second electrode (1122) may be a negative electrode. For another example, if the first electrode (1112) is a negative electrode, the second electrode (1122) may be a positive electrode.

[0094] The separator reel (121) is a reel on which a separator sheet (122) is wound, and the separator sheet (122) is unwound from the separator reel (121). Subsequently, the separator sheet (122) is laminated with an electrode (11) formed by cutting electrode sheets (1111, 1121). Here, the electrode (11) and the separator sheet (122) are laminated in a Z-folding manner. More specifically, in this embodiment, when a first electrode (1112) is placed on the separator sheet (122), one side is folded to cover the first electrode (1112), and when a second electrode (1122) is placed, the other side is folded to cover the second electrode (1122).

[0095] The table (16) can be stacked so that the electrode (11) and the separator sheet (122) are placed on its upper surface. More preferably, the upper surface of the table (16) is formed to be approximately flat so that the electrode (11) and the separator sheet (122) can be stacked stably.

[0096] The table (16) may be placed 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).

[0097] Accordingly, the electrode (11) and the separator sheet (122) can be stacked on the table (16) while the table (16) is fixed, so that the alignment of the electrode (11) and the separator sheet (122) can be further improved.

[0098] The battery cell manufacturing apparatus (1) according to the present embodiment may further include a first transfer device (141) for transferring a first electrode (1112) toward a table (16); and a second transfer device (142) for transferring a second electrode (1122) toward a table (16). Here, the first transfer device (141) can transfer a first electrode (1112) formed by cutting a first electrode sheet (1111) unwound from a first electrode reel (111) toward a table (16). Additionally, the second transfer device (142) can transfer a second electrode (1122) formed by cutting a second electrode sheet (1121) unwound from a second electrode reel (112) toward a table (16).

[0099] Accordingly, in this embodiment, the first electrode (1112) and the second electrode (1122) can be transported to both sides of the table (16) through the first transfer device (141) and the second transfer device (142), respectively, making it easy to alternately stack the first electrode (1112) and the second electrode (1122) on the separator sheet (122).

[0100] The battery cell manufacturing apparatus (1) according to the present embodiment may include headers (141, 142) that adsorb an electrode (11) and place it on a separator sheet (122). More specifically, the headers (141, 142) may further include a first header (151) that adsorbs a first electrode (1112) and places it on a separator sheet (122), and a second header (152) that adsorbs a second electrode (1122) and places it on a separator sheet (122). Here, the first header (151) and the second header (152) may each move back and forth in a straight line toward a table (16).

[0101] 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). Additionally, the first header (151) and the second header (152) can move in a straight line toward the table (16).

[0102] Accordingly, in this embodiment, the first header (151) and the second header (152) can move the electrode (11) upward on the table (16) and can stably seat the electrode (11) on the separator sheet (122).

[0103] Additionally, the header (151, 152) can measure whether the first electrode (1112) or the second electrode (1122) is misaligned for each first electrode (1112) or second electrode (1122), and then correct the position as needed so that it can be accurately seated at a desired position on the separator sheet (122) located on the table (16). Accordingly, in this embodiment, the degree of alignment between the electrode (11) and the separator sheet (122) stacked and aligned on the table (16) can be further improved.

[0104] Referring to FIG. 2, a battery cell manufacturing apparatus (1) according to one embodiment of the present invention can apply adhesive using a pair of upper nozzles (17), which are referred to as "horizontal nozzles" for convenience. More specifically, the pair of upper nozzles (17) can each rotate. As the pair of upper nozzles (17) each rotate, their respective discharge ports can be directed toward a separator sheet (122).

[0105] In the embodiment of FIG. 2, the first upper nozzle (171) can be rotated, for example, counterclockwise with respect to the direction of movement of the separator sheet (122). Accordingly, the discharge port of the first upper nozzle (171) can be directed toward the separator sheet (122) passing between the upper and lower separator guides (125a, 125b) to be described later. Additionally, the second upper nozzle (172) can be rotated, for example, clockwise with respect to the direction of movement of the separator sheet (122). Accordingly, the discharge port of the second upper nozzle (172) can be directed toward the separator sheet (122) passing between the upper and lower separator guides (125a, 125b).

[0106] In this way, adhesive can be applied to the membrane sheet (122) while the respective discharge ports of the first upper nozzle (171) and the second upper nozzle (172) are directed toward the membrane sheet (122) passing between the upper and lower membrane guides (125a, 125b).

[0107] In FIG. 2, for convenience, the case where both the first upper nozzle (171) and the second upper nozzle (172) are rotated to be horizontal is illustrated. However, the first upper nozzle (171) and the second upper nozzle (172) do not necessarily have to be rotated simultaneously, and various variations and changes are possible, such as only the first upper nozzle (171) being rotated or only the second upper nozzle (172) being rotated. That is, depending on the process of applying adhesive to the separator sheet (122) from the first upper nozzle (171) or the process of applying adhesive to the separator sheet (122) from the second upper nozzle (172), the first upper nozzle (171) and the second upper nozzle (172) may be rotated separately or simultaneously.

[0108] In addition, regarding the rotation angles of the first upper nozzle (171) and the second upper nozzle (172), the present invention is not limited to those described above and various modifications and changes are possible. That is, it is sufficient if the adhesive is applied to the separator sheet (122) while the respective discharge ports of the first upper nozzle (171) and the second upper nozzle (172) are facing the separator sheet (122).

[0109] Referring to FIG. 3, in the battery cell manufacturing apparatus (1) according to the present embodiment, the electrode (11) can be placed on the separator sheet (122) with an adhesive applied to at least a portion of the lower part of the electrode (11). More specifically, in the present embodiment, the adhesive may be applied to at least a portion of the lower part of the electrode (11) when it is positioned on the transfer device (141, 142), or the adhesive may be applied to at least a portion of the lower part of the electrode (11) when it is adsorbed to the header (151, 152).

[0110] In some cases, since an adhesive layer (1710) is formed by applying an adhesive to the separator sheet (122) in FIG. 2, the electrode (11) may be seated on the separator sheet (122) without the adhesive being applied to the lower part of the electrode (11) in FIG. 3.

[0111] FIG. 4 is a schematic diagram showing the application of an adhesive to the lower part of a first electrode in a battery cell manufacturing apparatus (1) according to one embodiment of the present invention. FIG. 5 is a schematic diagram showing a modified example of the application of an adhesive to the lower part of the first electrode in FIG. 4.

[0112] Referring to FIGS. 4 and 5, the battery cell manufacturing apparatus (1) according to the present embodiment may include a lower nozzle (173) for applying adhesive to at least a portion of the lower surface of the first electrode (1112). More specifically, the lower nozzle (173) may apply adhesive to at least a portion of the lower surface of the first electrode (1112). Accordingly, a first adhesive layer (1710) may be formed on the lower surface of the first electrode (1112).

[0113] For example, referring to FIG. 4, when the first electrode (1112) is adsorbed to the first header (151), the lower nozzle (173) can apply adhesive to at least a portion of the lower part of the first electrode.

[0114] In another example, the first transfer device (141a) includes a first groove (141a') that is open toward the first electrode (1112), so that the lower nozzle (173) can apply adhesive to at least a portion of the lower part of the first electrode (1112) through the first groove (141a'). Here, the first transfer device (141a) may have at least one first groove (141a') formed therein, and a 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.

[0115] However, for the sake of convenience of explanation, this is explained using the first electrode (1112) as an example, and the second electrode (1122) can be similarly explained using the second header (152) or the second transfer device (142).

[0117] Here, it may be desirable for the adhesive to be applied uniformly to the lower part of the electrode (11). However, if the adhesive is applied to the entire front surface of the lower part of the electrode (11), the amount of adhesive applied may be excessive. In this case, the adhesive may flow to the outside of the separator sheet (122) and contaminate other parts, and the power generation function may not be smooth when the secondary battery is manufactured.

[0118] Accordingly, in this embodiment, it may be preferable for the adhesive to be applied in a spot application method, which applies it in a dot shape to the lower part of the electrode (11), or in a line application method, which applies it in a line shape. That is, it may be preferable for the first adhesive layer (1710) to be formed in a spot pattern or a line pattern.

[0119] In contrast, if the amount of adhesive applied is excessively small, the electrode (11) may not be fixed to the separator sheet (122) while the cell is moving and may deviate from its position. Therefore, it may be desirable that the gap between the areas where the adhesive is applied is not excessively wide.

[0120] Additionally, the adhesive can be applied to the surface of the electrode (11) in a minimum amount sufficient to ensure adhesion between the electrode (11) and the separator sheet (122). In contrast, if the adhesive is applied directly onto the separator sheet (122), the separator sheet (122) absorbs some of the adhesive, so there is a problem that a larger amount of adhesive must be applied to ensure adhesion between the electrode (11) and the separator sheet (122).

[0121] Meanwhile, the adhesive may be dissolved in the electrolyte. More specifically, when the first adhesive layer (1710) formed on the lower part of the electrode (11) is impregnated with the electrolyte, the adhesive contained in the first adhesive layer (1710) may be dissolved in the electrolyte. Here, dissolving the adhesive may mean that the adhesive melts into the electrolyte. That is, it may mean that the area of ​​the first adhesive layer (1710) formed on the lower part of the electrode (11) is reduced, or that the first adhesive layer (1710) is completely removed so that no first adhesive layer (1710) remains on the lower part of the electrode (11).

[0122] For example, the adhesive may be an acrylate-based adhesive. Accordingly, in this embodiment, by applying an acrylate-based adhesive to the lower part of the electrode (11) as the adhesive, the adhesive can be dissolved and enter into the electrolyte contained in the final battery cell.

[0123] Accordingly, in this embodiment, the first adhesive layer (1710) can fix the electrode (11) to the separator sheet (122) during the manufacturing process to prevent it from deviating from its position. In addition, the first adhesive layer (1710) can be dissolved in the electrolyte contained in the final battery cell so as not to hinder the movement of lithium ions between the electrode and the separator, and the battery cell performance can also be further improved.

[0124] FIG. 6 is a schematic diagram showing the first upper nozzle moving in a straight line and applying adhesive to the upper part of the first electrode in the battery cell manufacturing device of FIG. 2.

[0125] Referring to FIG. 6, a pair of upper nozzles (17) apply adhesive to at least a portion of the upper part 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 part of the first electrode (1112) and a second upper nozzle (172) that applies adhesive to at least a portion of the upper part of the second electrode (1122).

[0126] Additionally, the first upper nozzle (171) and the second upper nozzle (172) may be positioned on both sides with the separator sheet (122) in between. That is, the first upper nozzle (171) may form a second adhesive layer (1750) by applying an adhesive to at least a portion of the upper surface of the first electrode (1112) before the separator sheet (122) covers the upper surface of the first electrode (1112). Additionally, as described later in FIG. 8, the second upper nozzle (172) may form a second adhesive layer (1750) by applying an adhesive to at least a portion of the upper surface of the second electrode (1122) before the separator sheet (122) covers the upper surface of the second electrode (1122).

[0127] Additionally, a pair of upper nozzles (17) can move in a straight line back and forth relative to the table (16). That is, the pair of upper nozzles (17) can apply adhesive to at least a portion of the upper part of the electrode (11) while moving in a straight line from one side of the table (16) toward the other side or in the opposite direction.

[0128] Additionally, the description of the adhesive applied from a pair of upper nozzles (17) can be described in the same way as the adhesive applied from the lower nozzle (173) described above.

[0129] Here, a pair of upper nozzles (17) can reciprocate left and right simultaneously or separately with respect to the table (16). More preferably, a pair of upper nozzles (17) can reciprocate left and right simultaneously with respect to the table (16). For example, as shown in FIG. 6, when the first upper nozzle (171) applies adhesive from one side of the table (16) toward the other side, as described later in FIG. 8, the second upper nozzle (172) can apply adhesive from the other side of the table (16) toward one side.

[0130] Accordingly, in this embodiment, the process time of the adhesive application process of a pair of upper nozzles (17) is reduced, and process efficiency can be further improved.

[0131] FIG. 7 is a schematic diagram showing the separator guide moving in a straight line and the second electrode being placed on the second region of the separator sheet in the battery cell manufacturing device of FIG. 2. Before the second electrode is placed, as described above in FIG. 2, an adhesive may be applied to the separator sheet (122) while the discharge port of the second upper nozzle (172) is facing the separator sheet (122).

[0132] Additionally, as described above in FIG. 3, the second electrode may be seated on the separator sheet (122) with adhesive applied to at least a portion of the lower part of the second electrode, but the second electrode may also be seated on the separator sheet (122) without adhesive applied to the lower part of the second electrode.

[0133] Referring to FIGS. 6 and 7, in this embodiment, the separator sheet (122) can be guided in a folding direction by a separator guide (125). More specifically, the separator guide (125) can move in a straight reciprocating motion left and right relative to the table (16).

[0134] For example, the separator guide (125) may have a form in which a pair of rolls are arranged horizontally, and a separator sheet (122) may be inserted between the pair of rolls. However, the form of the separator guide (125) is not limited thereto, and any form capable of controlling the folding direction of the separator sheet (122) may be included in this embodiment.

[0135] Additionally, the separator guide (125) may include an upper separator guide (125a) and a lower separator guide (125b) located respectively at the upper and lower ends relative to a pair of upper nozzles (17). However, the position and number of the upper separator guide (125a) and the lower separator guide (125b) are not limited thereto, and any position and number capable of controlling the folding direction of the separator sheet (122) may be included in this embodiment. The lower separator guide (125b) is described in detail with reference to FIG. 27, which will be described later.

[0136] Here, when the separator guide (125) moves in a linear reciprocating motion toward the first transfer device (141) and the second transfer device (142) relative to the table (16), the separator sheet (122) is folded along the direction of movement of the separator guide (125) so that the separator sheet (122) can cover the electrode (11).

[0137] For example, referring to FIGS. 6 and 7, with the first electrode (1112) seated on the first region (1221) of the separator sheet (122), the separator guide (125) moves linearly toward the first transfer device (141) so that the second region (1222) of the separator sheet (122) can cover the upper part of the first electrode (1112).

[0138] Here, the first region (1221) of the separator sheet (122) refers to the region of the separator sheet (122) to which the first electrode (1112) is attached. In some cases, the first region (1221) refers to the region of the separator sheet (122) to which the first electrode (1112) is attached while covering the second electrode (1122). And, the second region (1222) refers to the region of the separator sheet (122) to which 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 separator sheet (122), and the second electrode (1122) may be placed on the second region (1222) of the separator sheet (122).

[0139] Additionally, the membrane guide (125) may reciprocate left and right simultaneously with a pair of upper nozzles (17) relative to the table (16), or the membrane guide (125) and the pair of upper nozzles (17) may each reciprocate left and right.

[0140] That is, in this embodiment, when the first upper nozzle (171) applies adhesive to at least a portion of the upper part of the first electrode (1112) as shown in FIGS. 6 and 7, the separator guide (125) moves linearly in the direction in which the separator sheet (122) covers the first electrode (1112). Additionally, as described later in FIG. 8, when the second upper nozzle (172) applies adhesive to at least a portion of the upper part of the second electrode (1122), the separator guide (125) can move linearly in the direction in which the separator sheet (122) covers the second electrode (1122).

[0141] Accordingly, the separator guide (125) can be Z-folded so that the separator sheet (122) covers the upper and lower parts of the electrode (11).

[0142] More preferably, the separator guide (125) and a pair of upper nozzles (17) can simultaneously reciprocate left and right with respect to 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, the separator guide (125) can also move in a straight line from one side of the table (16) to the other to fold the separator sheet (122).

[0143] Accordingly, the folding process of the separator sheet (122) by the separator guide (125) can be performed simultaneously with the adhesive application process of a pair of upper nozzles (17), thereby reducing the process time and further improving process efficiency.

[0144] FIG. 8 is a schematic diagram showing the second upper nozzle moving in a straight line and applying adhesive to the upper part of the second electrode in the battery cell manufacturing device of FIG. 2.

[0145] Referring to FIGS. 3, 7, and 8, in the battery cell manufacturing apparatus (1) according to the present embodiment, similar to the first electrode (1112), the second electrode (1122) can be adsorbed to the second header (152) and perform linear reciprocating motion. For example, as shown in FIG. 7, with the second electrode (1122) adsorbed to the second header (152), the second header (152) can move linearly so that it is positioned on the upper part of the table (16). At this time, the second electrode (1122) can be placed on the second region (1222) of the separator sheet (122). In addition, the description of the second electrode (1122) and the second header (152) can be described in the same way as the first upper nozzle (171) described above.

[0146] Additionally, similar to the first upper nozzle (171), the second upper nozzle (172) can perform a linear reciprocating motion relative to the table (16). For example, as the second upper nozzle (172) moves from one side of the table (16) toward the other, adhesive can be applied to at least a portion of the upper part of the second electrode (1122). Furthermore, the description of the second upper nozzle (172) can be described in the same way as the first upper nozzle (171) described above.

[0148] Using such a battery cell manufacturing device (1), a battery cell manufacturing method according to one embodiment of the present invention can be performed as follows.

[0149] First, referring to FIGS. 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) and a plurality of first electrodes (1112) are formed (S101).

[0150] Meanwhile, as the membrane sheet (122) is unwound from the membrane reel (121), an adhesive is applied to the first region (1221) of the membrane sheet (122) to form a first adhesive layer (1710). At this time, the discharge port of the first upper nozzle (171) applies the adhesive toward the membrane sheet (122) that has passed through the upper membrane guide (205a). The membrane sheet (122) with the applied adhesive passes through the lower membrane guide (125b) and is placed on the upper surface of the table (16) (S102).

[0151] Additionally, the lower nozzle (173) applies adhesive to the lower part of the first electrode (1112) (S103). For 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). For 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 transfer device (141) is transferring 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 to be seated in step S102, the step S103 of applying adhesive to the lower part of the first electrode (1112) may or may not be performed depending on the case. That is, step S103 can be optionally applied to suit the requirements of the environment in which the present invention is implemented and the battery cell.

[0152] Additionally, referring to FIGS. 1 and 2, the first header (151) can move linearly onto the table (16) while adsorbing the first electrode (1112). Then, 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, onto the first region (1221) of the separator sheet (122) (S104).

[0153] Additionally, referring to FIGS. 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) can apply adhesive to the upper portion of the first electrode (1112) (S105). Here, as the first upper nozzle (171) moves toward the first transfer device (141), a second adhesive layer (1750) can be formed on the upper portion of the first electrode (1112).

[0154] Additionally, referring to FIGS. 1 and 7, with at least a portion of the second adhesive layer (1750) formed on the upper part of the first electrode (1112), the separator guide (125) moves in the same direction as the movement direction of the first upper nozzle (171), so that one side of the separator sheet (122) is folded, and the second region (1222) of the separator sheet (122) covers the first electrode (1112) (S106).

[0155] Meanwhile, as shown in FIG. 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 transfer device (142) transfers the second electrode (1122), the second header (152) adsorbs the second electrode (1122). Here, similar to the first electrode (1112), the lower part of the second electrode (1122) may have a first adhesive layer (1710) formed by applying an adhesive from the lower nozzle (173).

[0156] And, as shown in FIG. 7, when the second region (1222) of the separator sheet (122) covers the first electrode (1112), the second header (152) adsorbing the second electrode (1122) moves toward the upper part of the second region (1222) and places the second electrode (1122) on the upper part of the second region (1222).

[0157] And, as shown in FIG. 8, the second upper nozzle (172) applies adhesive to the upper part of the second electrode (1122). Here, as the second upper nozzle (172) moves toward the second transfer device (142), a second adhesive layer (1750) can be formed on the upper part of the second electrode (1122).

[0158] Subsequently, with at least a portion of the second adhesive layer (1750) formed on the upper part of the second electrode (1122), the separator guide (125) moves in the same direction as the movement direction of the second upper nozzle (172), so that the other side of the separator sheet (122) is folded, and the first region (1221) of the separator sheet (122) covers the second electrode (1122).

[0159] That is, by repeating the above processes, a cell manufacturing method according to one embodiment of the present invention can be performed.

[0161] Hereinafter, a method and apparatus for manufacturing a battery cell according to another embodiment of the present invention will be described.

[0162] FIG. 9 is a flowchart of a method for manufacturing a battery cell according to another embodiment of the present invention. FIG. 10 is a schematic diagram showing a first electrode being placed in a first region of a separator sheet in a battery cell manufacturing apparatus according to another embodiment of the present invention.

[0163] Referring to FIG. 9 and FIG. 10, a method for manufacturing a battery cell according to another embodiment of the present invention comprises the steps of: cutting electrode sheets (1111, 1121) to form an electrode (11) (S201); placing a separator sheet (122) on a table (16) (S202); applying an adhesive to the lower part of the electrode (1112, 1122) (S203); placing the electrode (1112, 1122) on the separator sheet (122) (S204); applying an adhesive to the separator sheet (122) (S204); and folding the separator sheet (122) with the adhesive applied to it to cover the electrode (1112, 1122) (S205).

[0165] Hereinafter, 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, the parts identical to the components of the battery cell manufacturing apparatus (1) described above in FIGS. 2 to 8 are described with reference to FIGS. 2 to 8. Hereinafter, the parts that differ from the battery cell manufacturing apparatus (1) will be described mainly.

[0166] Hereinafter, each step illustrated in the flowchart of FIG. 9 will be explained in detail with reference to FIG. 10 to FIG. 15.

[0167] A battery cell manufacturing apparatus (2) according to another embodiment of the present invention comprises: an electrode reel (111, 112) from which an electrode sheet having a plurality of electrodes (11) formed is unwound; a separator reel (121) from which a separator sheet (122) that covers the electrode (11) and is laminated with the electrode (11) is unwound when the electrode (11) is placed and folded; a table (16) on which the electrode (11) and the separator sheet (122) are placed on an upper surface; a separator guide (125) that guides the folding direction of the separator sheet (122); and a pair of upper nozzles (17) that apply an adhesive to at least a portion of the electrode (11) or the separator sheet (122) guided by the separator guide (125).

[0168] In the battery cell manufacturing apparatus (2) according to the present embodiment, the table (16) is positioned between the first electrode reel (111) and the second electrode reel (112) and can perform rotational reciprocating motion between the first electrode reel (111) and the second electrode reel (112). For example, the table (16) can perform rotational reciprocating motion between the first electrode reel (111) and the second electrode reel (112) in an angle range of 0 to 180 degrees relative to the bottom surface. However, the rotation angle of the table (16) is not limited to this and can be rotated at various angles.

[0169] Accordingly, the table (16) rotates back and forth between the first electrode reel (111) and the second electrode reel (112), so that the electrode (11) can be stacked more quickly on the table (16) and the process speed and efficiency can be further improved in that it can assist in folding the separator sheet (122) of the separator guide (125).

[0170] In particular, in this embodiment, as the table (16) rotates and reciprocates between the first electrode reel (111) and the second electrode reel (112), the table (16) may be rotated to be adjacent to the first transfer device (141) and the second transfer device (142), respectively. Accordingly, this embodiment can quickly stack electrodes (11) transferred from the first transfer device (141) and the second transfer device (142) on the table (16).

[0171] In the battery cell manufacturing apparatus (2) according to the present embodiment, the first header (151) and the second header (152) can each rotate and reciprocate in a direction facing the table (16). More specifically, the first header (151) and the second header (152) can rotate and reciprocate in a direction facing the upper surface of the table (16). The headers (151, 152) each additionally include a rotational driving unit (151a, 152b) to enable rotation and reciprocate movement.

[0172] In particular, in this embodiment, the table (16) is rotated 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).

[0173] Accordingly, in this embodiment, the first header (151) and the second header (152) can move the electrode (11) upward on the table (16) that rotates and reciprocates, and can stably seat the electrode (11) on the separator sheet (122).

[0174] FIG. 11 is a schematic diagram showing the application of adhesive to the lower part of the first electrode in the battery cell manufacturing apparatus (2) of FIG. 10. FIG. 12 is a schematic diagram showing a modified example of the application of adhesive to the lower part of the first electrode of FIG. 11.

[0175] Meanwhile, FIGS. 11 and 12 illustrate a case in which a rotary driving unit (151a) is additionally provided in the header (151) that adsorbs the electrode. For a description of the remaining components and the process of applying adhesive to the lower part of the first electrode, refer to FIGS. 4 and FIGS. 4 regarding the battery cell manufacturing device (1).

[0176] The battery cell manufacturing device (2) according to the present embodiment has the advantage of being able to apply an adhesive to at least a portion of the lower part of the electrode (11) during the transfer process of the electrode (11), thereby improving the convenience and speed of the process.

[0177] Meanwhile, in the battery cell manufacturing apparatus (2) of FIG. 10, it may be desirable for the adhesive to be uniformly applied to the lower part of the electrode (11). Accordingly, in this embodiment as well, in order to apply an appropriate amount of adhesive, it may be desirable for the adhesive to be applied in a spot application method in the form of dots or in a line application method in the form of lines on the lower part of the electrode (11). That is, it may be desirable for the first adhesive layer (1710) to be formed in a spot pattern or a line pattern.

[0178] Meanwhile, in this embodiment as well, the adhesive can be dissolved in the electrolyte. For further description regarding the adhesive in this embodiment, refer to the description regarding the adhesive described above in relation to FIGS. 1 to 8.

[0179] FIGS. 13 and 14 are schematic diagrams showing that in the battery cell manufacturing device (2) of FIG. 10, the table moves in rotation while the separator guide and the first upper nozzle move in a straight line, and the first upper nozzle rotates while applying adhesive to the second area.

[0180] Referring to FIGS. 10, 13, and 14, a pair of upper nozzles (17) apply adhesive to at least a portion of a separator sheet (122) guided by a separator 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 a first region (1221) of the separator sheet (122) and a second upper nozzle (172) that applies adhesive to at least a portion of a second region (1222) of the separator sheet (122).

[0181] Meanwhile, in the battery cell manufacturing device (2) of FIG. 10, adhesive can also be applied using a pair of upper nozzles (17), which are referred to as "horizontal nozzles" for convenience. That is, adhesive can be applied to the separator sheet (122) with the respective discharge ports of the first upper nozzle (171) and the second upper nozzle (172) facing the separator sheet (122) passing between the upper and lower separator guides (125a, 125b).

[0182] In FIG. 10, for convenience, the case where both the first upper nozzle (171) and the second upper nozzle (172) are rotated 90 degrees is illustrated. However, the first upper nozzle (171) and the second upper nozzle (172) do not necessarily have to be rotated simultaneously, and various variations and changes are possible, such as only the first upper nozzle (171) being rotated or only the second upper nozzle (172) being rotated, as described later.

[0183] For the basic description of each of the first upper nozzle (171) and the second upper nozzle (172) as a pair of upper nozzles (17) in the battery cell manufacturing device (2) of FIG. 10, refer to the description of the same components described above in relation to FIG. 2. However, parts where the manufacturing process of each of the first upper nozzle (171) and the second upper nozzle (172) of the battery cell manufacturing device (2) differs from the manufacturing process of each of the first upper nozzle (171) and the second upper nozzle (172) of the battery cell manufacturing device (1) will be explained in detail with reference to FIG. 13 to 16.

[0184] Referring to FIG. 13, the first upper nozzle (171) can apply adhesive to the surface covering the first electrode (1112) in the second region (1222) of the separator sheet (122). That is, the first upper nozzle (171) can apply adhesive to the surface opposite to the 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) can rotate counterclockwise to apply adhesive in the second region (1222) of the separator sheet (122).

[0185] Additionally, referring to FIG. 16, the second upper nozzle (172) can apply adhesive to the surface covering the second electrode (1122) in the first region (1221) of the separator sheet (122). That is, the second upper nozzle (172) can apply adhesive to the surface opposite to the surface to which the first electrode (1112) is attached in the first region (1221) of the separator sheet (122). In this case, the second upper nozzle (172) can rotate clockwise to apply adhesive to the first region (1221) of the separator sheet (122).

[0186] Additionally, referring to FIGS. 10, 13 to 16, the first upper nozzle (171) and the second upper nozzle (172) may be positioned on both sides with the separator sheet (122) in between. That is, the first upper nozzle (171) may form a second adhesive layer (1750) by applying an adhesive to at least a portion of the second region (1222) before the second region (1222) of the separator sheet (122) covers the upper part of the first electrode (1112). Additionally, as described later in FIG. 16, the second upper nozzle (172) may form a second adhesive layer (1750) by applying an adhesive to at least a portion of the first region (1221) before the first region (1221) of the separator sheet (122) covers the upper part of the second electrode (1122).

[0187] Additionally, depending on the case, a pair of upper nozzles (17) may or may not move in a straight line back and forth relative to the table (16). Whether or not to move in a straight line can be applied in various ways depending on the positional relationship between the pair of upper nozzles (17), the table (16), and the separator sheet (122). That is, the pair of upper nozzles (17) may apply adhesive to at least a portion of the first region (1221) or the second region (1222) of the separator sheet (122) while moving in a straight line from one side of the table (16) toward the other side or in the opposite direction, or while in a fixed state.

[0188] For example, referring to FIGS. 10, 13, and 14, the first electrode (1112) may be seated on the first region (1221) of the separator sheet (122), and at the same time, the first upper nozzle (171) may move linearly on the second region (1222) of the separator sheet (122). Here, the first upper nozzle (171) may apply adhesive to at least a portion of the second region (1222) while moving linearly away from the table (16). Additionally, as described later in FIG. 16, the second electrode (1122) may be seated on the second region (1222) of the separator sheet (122), and at the same time, the second upper nozzle (172) may move linearly on the first region (1221) of the separator sheet (122). Here, the second upper nozzle (172) can apply adhesive to at least a portion of the first area (1221) while moving in a straight line away from the table (16).

[0189] In addition, the description of the adhesive applied from the pair of upper nozzles (17) in this embodiment can be described in the same way as the adhesive applied from the battery cell manufacturing device (1) of FIG. 2 described above.

[0190] Additionally, a pair of upper nozzles (17) can reciprocate left and right simultaneously or separately relative to the table (16). More preferably, a pair of upper nozzles (17) can reciprocate left and right simultaneously relative to the table (16). For example, as shown in FIGS. 13 and 14, when the first upper nozzle (171) applies adhesive from one side of a first area (1221) located on the right side of the table (16) toward the other side, as described later in FIG. 16, the second upper nozzle (172) can apply adhesive from one side of a second area (1222) located on the left side of the table (16) toward the other side.

[0191] Accordingly, in this embodiment, the process time of the adhesive application process of a pair of upper nozzles (17) can be reduced. Additionally, the adhesive application process of a pair of upper nozzles (17) can be performed simultaneously with the process of the electrode (11) being seated on the separator sheet (122), thereby further improving process efficiency.

[0192] Additionally, in this embodiment, as the table (16) rotates back and forth between the first electrode reel (111) and the second electrode reel (112), the position and / or angle between the pair of upper nozzles (17) and the separator sheet (122) may be changed. Accordingly, the application interval and / or amount of adhesive applied from the pair of upper nozzles (17) to the separator sheet (122) may become uneven.

[0193] Referring to FIGS. 13 and 14, when a pair of upper nozzles (17) each apply adhesive onto a separator sheet (122), the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) can rotate in a direction adjacent to the separator sheet (122). The pair of upper nozzles (17) can rotate in a direction in which the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) faces the upper surface of the separator sheet (122). In other words, the angle between the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) and the upper surface of the separator sheet (122) can be adjusted for each of the pair of upper nozzles (17).

[0194] For example, a pair of upper nozzles (17) can be rotated so that the angle between the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) and the upper surface of the separator sheet (122) is constant. However, the rotation angle of the pair of upper nozzles (17) is not limited to this, and any angle that results in a uniform application interval of the adhesive may be included in this embodiment.

[0195] Additionally, although not shown in FIGS. 10, 13 and 14, a pair of upper nozzles (17) can be moved in a direction such that the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) becomes adjacent to the separator sheet (122).

[0196] For example, a pair of upper nozzles (17) may be moved to a different position so that the height difference between the discharge port of the first upper nozzle (171) or the discharge port of the second upper nozzle (172) and the upper surface of the separator sheet (122) is constant. However, the position of the pair of upper nozzles (17) is not limited to this, and any position where the adhesive application interval becomes uniform may be included in this embodiment.

[0197] Accordingly, the present embodiment can adjust the angle or position of a pair of upper nozzles (17) to make the application interval and / or amount of adhesive applied from a pair of upper nozzles (17) more uniform and to further improve the quality.

[0198] FIG. 15 is a schematic diagram showing the appearance of a second region coated with adhesive covering a first electrode as the separator guide moves in a straight line in the opposite direction in the battery cell manufacturing apparatus of FIG. 10.

[0199] Referring to FIGS. 13 to 15, in this embodiment, the separator sheet (122) can be guided in a folding direction by a separator guide (125). More specifically, the separator guide (125) can move in a straight reciprocating motion left and right relative to the table (16).

[0200] In addition, in this embodiment as well, the separator guide (125) may include an upper separator guide (125a) and a lower separator guide (125b) located respectively at the upper and lower ends relative to a pair of upper nozzles (17). For the description of the separator guide (125), refer to the description of the battery cell manufacturing apparatus (1) of FIG. 2 described above. Also, the lower separator guide (125b) will be described in detail with reference to FIG. 27, which will be described later.

[0201] Here, the membrane guide (125) may reciprocate left and right simultaneously with a pair of upper nozzles (17) relative to the table (16), or the membrane guide (125) and the pair of upper nozzles (17) may each reciprocate left and right.

[0202] More preferably, at the same time as the first upper nozzle (171) applies adhesive to at least a portion of the second region (1222) of the separator sheet (122), the separator guide (125) moves linearly toward the second electrode reel (112) or the second transfer device (142). Additionally, as described later in FIG. 16, at the same time as the second upper nozzle (172) applies adhesive to at least a portion of the first region (1221) of the separator sheet (122), the separator guide (125) may move linearly toward the first electrode reel (111) or the first transfer device (141).

[0203] Accordingly, the separator guide (125) forms an area in the separator sheet (122) where adhesive can be applied from the first upper nozzle (171) or the second upper nozzle (172), so that the separator guide (125) can assist in the adhesive application process of a pair of upper nozzles (17).

[0204] Additionally, when the separator guide (125) moves in a linear reciprocating motion toward the first transfer device (141) and the second transfer device (142) relative to the table (16), the separator sheet (122) is folded along the direction of movement of the separator guide (125), so that the separator sheet (122) can cover the electrode (11).

[0205] For example, referring to FIG. 15, with the first electrode (1112) seated on the first region (1221) of the separator sheet (122), the separator guide (125) moves in a straight line toward the first transfer device (141) so that the second region (1222) of the separator sheet (122) can cover the upper part of the first electrode (1112).

[0206] More specifically, when the adhesive application of the first upper nozzle (171) is completed as in FIG. 14, the separator guide (125) moves in a straight line in a direction such that the second region (1222) of the separator sheet (122) with the adhesive applied covers the first electrode (1112) as in FIG. 15. Likewise, when the adhesive application of the second upper nozzle (172) is completed, the separator guide (122) moves in a straight line in a direction such that the first region (1221) of the separator sheet (122) with the adhesive applied covers the second electrode (1122).

[0207] Accordingly, in this embodiment, the separator guide (125) can perform the folding process of the separator sheet (122) while assisting the adhesive application process of a pair of upper nozzles (17), thereby reducing the process time and further improving process efficiency.

[0208] FIG. 16 is a schematic diagram showing the second electrode being placed in the second region of the separator sheet in the battery cell manufacturing apparatus of FIG. 10.

[0209] Referring to FIG. 10 and FIG. 16, in the battery cell manufacturing apparatus (2) according to the present embodiment, similar to the first electrode (1112), the table (16) can rotate and reciprocate toward the second electrode reel (112) or the second transfer device (142). At this time, the second electrode (1122) can rotate and reciprocate while adsorbed to the second header (152). For example, as shown in FIG. 16, with the second electrode (1122) adsorbed to the second header (152), the second header (152) can rotate and move so that it is positioned on the upper part of the table (16). At this time, the second electrode (1122) can be placed on the second region (1222) of the separator sheet (122). In addition, the description of the second electrode (1122) and the second header (152) can be described in the same way as the first upper nozzle (171) described above.

[0210] Additionally, similar to the first upper nozzle (171), the second upper nozzle (172) can move in a straight reciprocating motion relative to the table (16). For example, as the second upper nozzle (172) moves from one side of the first area (1221) located on the right side of the table (16) toward the other side, adhesive can be applied to at least a portion of the first area (1221).

[0212] Using such a battery cell manufacturing device (2), a battery cell manufacturing method according to another embodiment of the present invention can be performed as follows.

[0213] 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) and a plurality of first electrodes (1112) are formed (S201).

[0214] Meanwhile, when the separator sheet (122) is unwound from the separator 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 transfer device (141) while the separator sheet (122) is placed thereon.

[0215] Additionally, the lower nozzle (173) applies adhesive to the lower part of the first electrode (1112) (S203). For 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). For 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 transfer device (141) is transferring the first electrode (1112).

[0216] Additionally, referring to FIGS. 9 and 10, the first header (151) can rotate and move onto the table (16) while adsorbing the first electrode (1112). Then, 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, onto the first region (1221) of the separator sheet (122) (S204).

[0217] Additionally, referring to FIGS. 9, 13, and 14, when the first electrode (1112) is placed on the first region (1221) of the separator sheet (122), the separator sheet (122) is unwound from the separator reel (121), and the first upper nozzle (171) can apply adhesive to the second region (1222) of the separator sheet (122) (S205). At this time, the discharge port of the first upper nozzle (171) applies adhesive toward the second region (1222) of the separator sheet (122) that has passed through the upper separator guide (205a). The separator sheet (122) with the applied adhesive passes through the lower separator guide (125b).

[0218] In some cases, as the first upper nozzle (171) moves toward the second transfer device (142), a second adhesive layer (1750) can be formed on the second region (1222) of the separator sheet (122). At this time, the separator guide (125) and the first upper nozzle (171) can move in a straight line together.

[0219] Additionally, referring to FIG. 9 and FIG. 15, with at least a portion of the second adhesive layer (1750) formed in the second region (1222) of the separator sheet (122), the separator guide (125) moves in a direction opposite to the direction of movement of the first upper nozzle (171) toward the first transfer device (141), so that one side of the separator sheet (122) is folded so that the second region (1222) of the separator sheet (122) covers the first electrode (1112) (S206).

[0220] Meanwhile, as shown in FIG. 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 transfer device (142) transfers the second electrode (1122), the second header (152) adsorbs the second electrode (1122). Here, similar to the first electrode (1112), the lower part of the second electrode (1122) may have a first adhesive layer (1710) formed by applying an adhesive from the lower nozzle (173).

[0221] And, as shown in FIG. 16, the table (16) can rotate toward the second electrode reel (112) or the second transfer device (142) while the second region (1222) of the separator sheet (122) is seated. At this time, if the second region (1222) of the separator sheet (122) covers the first electrode (1112), the second header (152) adsorbing the second electrode (1122) moves toward the upper part of the second region (1222) to seat the second electrode (1122) on the upper part of the second region (1222).

[0222] Then, as shown in FIG. 16, the second upper nozzle (172) applies adhesive to the first region (1221) of the separator sheet (122). Here, as the second upper nozzle (172) moves toward the first transfer device (141), a second adhesive layer (1750) can be formed on the first region (1221) of the separator sheet (122). At this time, the separator guide (125) and the second upper nozzle (172) can move in a straight line together.

[0223] Subsequently, with at least a portion of the second adhesive layer (1750) formed in the first region (1221) of the separator sheet (122), the separator guide (125) moves in a direction opposite to the direction of movement of the second upper nozzle (172) toward the second transfer device (142), so that the other side of the separator sheet (122) is folded, and the first region (1221) of the separator sheet (122) covers the second electrode (1122).

[0224] That is, by repeating the above processes, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0225] When performing the cell manufacturing method according to the embodiments of the present invention, when stacking the electrode (11) and the separator sheet (122) in a Z-folding shape, adhesive is applied to the upper and lower parts of the electrode (11), respectively, so that the electrode (11) can be prevented from deviating from its proper position.

[0227] Hereinafter, a method and apparatus for manufacturing a battery cell according to another embodiment of the present invention will be described.

[0228] FIG. 17 is a flowchart of a method for manufacturing a battery cell according to another embodiment of the present invention. FIG. 18 is a schematic diagram showing a first electrode being placed in 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 first electrode being placed in a first region of a separator sheet in the battery cell manufacturing apparatus of FIG. 18.

[0229] Referring to FIGS. 17 and 18, a method for manufacturing a battery cell according to another embodiment of the present invention comprises the steps of: cutting electrode sheets (1111, 1121) to form an electrode (11) (S301); applying an adhesive to a separator sheet (122) and placing the separator sheet (122) with the adhesive applied on it onto a table (16) (S302); placing the electrode (11) onto the separator sheet (122) (S303); applying an adhesive to the upper portion of the electrode (11) (S304); applying an adhesive to the separator sheet (122) (S305); and folding the separator sheet (122) to cover the electrode (11) (S306).

[0231] Hereinafter, 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, the parts identical to the components of the battery cell manufacturing apparatus (1) described above in FIGS. 2 to 8 are described with reference to FIGS. 2 to 8. Hereinafter, the parts that differ from the battery cell manufacturing apparatus (1) will be described mainly.

[0232] A battery cell manufacturing apparatus (3) according to another embodiment of the present invention comprises: an electrode reel (111, 112) from which an electrode sheet having a plurality of electrodes (11) formed is unwound; a separator reel (121) from which a separator sheet (122) that covers the electrode (11) and is laminated with the electrode (11) is unwound when the electrode (11) is placed and folded; a table (16) on which the electrode (11) and the separator sheet (122) are placed on an upper surface; a separator guide (125) that guides the folding direction of the separator sheet (122); a pair of upper nozzles (17) that apply an adhesive to at least a portion of the separator sheet (122) or the electrode (11) guided by the separator guide (125); and a pair of pressure rollers (130) that press the separator sheet (122) guided by the separator guide (125).

[0233] In the battery cell manufacturing apparatus (3) according to the present embodiment, the table (16) is positioned between the first electrode reel (111) and the second electrode reel (112) and can move in a straight reciprocating motion toward the first electrode reel (111) and the second electrode reel (112).

[0234] Accordingly, the table (16) moves in a linear reciprocating motion between the first electrode reel (111) and the second electrode reel (112), so that the electrode (11) can be stacked more quickly on the table (16) and the process speed and efficiency can be further improved in that it can assist in folding the separator sheet (122) of the separator guide (125).

[0235] Referring to FIGS. 18 and 19, in the battery cell manufacturing apparatus (3) according to the present embodiment, the first header (151) and the second header (152) can each move in a straight line back and forth toward the table (16), just like the battery cell manufacturing apparatus (1) of FIG. 2.

[0236] Referring to FIGS. 18 and 20, a pair of upper nozzles (17) apply adhesive to at least a portion of the upper part 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 part of the first electrode (1112) and a second upper nozzle (172) that applies adhesive to at least a portion of the upper part of the second electrode (1122).

[0237] Here, the first upper nozzle (171) can form a first adhesive layer (1710) by applying an adhesive to a first region (1221) of a separator sheet (122) guided by a separator guide (125) as shown in FIG. 18. More specifically, as the table (16) moves linearly toward the first transfer device (141) as shown in FIG. 18, the adhesive applied from the first upper nozzle (171) can form a first adhesive layer (1710) on the first region (1221) of the separator sheet (122). Subsequently, a first electrode (1112) can be placed on the first region (1221) of the separator sheet (122) on which the first adhesive layer (1710) is formed.

[0238] Meanwhile, in the battery cell manufacturing device (3) of FIG. 18, adhesive can also be applied using a horizontal nozzle. More specifically, in the battery cell manufacturing device (2) of FIG. 18, adhesive can also be applied using a pair of upper nozzles (17), which are referred to as "horizontal nozzles" for convenience. That is, adhesive can be applied to the separator sheet (122) with the respective discharge ports of the first upper nozzle (171) and the second upper nozzle (172) facing the separator sheet (122) passing between the upper and lower separator guides (125a, 125b).

[0239] In FIG. 18, for convenience, the case where both the first upper nozzle (171) and the second upper nozzle (172) are rotated 90 degrees is illustrated. However, the first upper nozzle (171) and the second upper nozzle (172) do not necessarily have to be rotated simultaneously, and various variations and changes are possible, such as only the first upper nozzle (171) being rotated or only the second upper nozzle (172) being rotated, as described later.

[0240] For the basic description of each of the first upper nozzle (171) and the second upper nozzle (172) as a pair of upper nozzles (17) in the battery cell manufacturing device (3) of FIG. 18, refer to the description of the same components described above in relation to FIG. 2. However, parts where the manufacturing process of each of the first upper nozzle (171) and the second upper nozzle (172) of the battery cell manufacturing device (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 device (1) will be explained in detail with reference to FIG. 18 to FIG. 22.

[0241] Meanwhile, in this embodiment as well, the adhesive may be applied in a spot application method, which applies it in a dot shape to the first region (1221) of the separator sheet (122), or in a line application method, which applies it in a line shape. In addition, in this embodiment as well, the adhesive may be dissolved in the electrolyte. For further description regarding the adhesive in this embodiment, refer to the description regarding the adhesive described above in relation to FIGS. 1 to 8.

[0242] Referring to FIGS. 18 to 22, the battery cell manufacturing apparatus (3) according to the present embodiment may include a pair of pressure rollers (130) that apply pressure to a separator sheet (122) guided from a separator guide (125). In the present embodiment, as an example, the pair of pressure rollers (130) are shown positioned between the table (16) and the separator guide (125). However, the present invention is not limited to the illustrated configuration, and the pair of pressure rollers (130) may be positioned between the upper separator guide (125a) and the lower separator guide (125b), and may be appropriately modified and arranged at points where pressure of the separator sheet (122) is required during the process. Meanwhile, the pair of pressure rollers (130) may be fixed.

[0243] For example, a pair of pressure rollers (130) may have a form in which a pair of rollers are arranged horizontally, and the pressure rollers (130) may press one side of the separator sheet (122). However, the form of the pressure rollers (130) is not limited thereto, and any form capable of pressing one side of the separator sheet (122) may be included in this embodiment.

[0244] Accordingly, at least one of the pair of pressure rollers (130) can press one side of the separator sheet (122) as shown in FIGS. 18 and 19, thereby controlling the tension of the separator sheet (122) to a constant level.

[0245] In particular, a pair of pressure rollers (130) may be positioned between a first upper nozzle (171) and a second upper nozzle (172). More specifically, a 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 positioned between the first upper nozzle (171) and the membrane guide (125), and the second pressure roller (1302) may be positioned between the second upper nozzle (172) and the membrane guide (125). That is, the first upper nozzle (171) and the second upper nozzle (172) may apply an adhesive onto a membrane sheet (122) that is pressurized by at least one of the pair of pressure rollers (130).

[0246] For example, as shown in FIG. 18, the first pressure roller (1301) can apply pressure to one side of the separator sheet (122) during the process in which adhesive is applied from the first upper nozzle (171) to the first region (1221) of the separator sheet (122). Accordingly, the first pressure roller (1301) can maintain a constant height difference between the first region (1221) of the separator sheet (122) and the first upper nozzle (171), and the amount or thickness of the first adhesive layer (1710) applied can be relatively uniform. This can be explained in the same way for the second pressure roller (1302).

[0247] Additionally, when the separator sheet (122) is pressed by the first pressure roller (1301), the first upper nozzle (171) can adjust the height or angle between the first area (1221) of the separator sheet (122) and the first upper nozzle (171). For example, with respect to the first area (1221) of the separator sheet (122), the first upper nozzle (171) can be moved so that the height difference between the first area (1221) of the separator sheet (122) and the first upper nozzle (171) is constant, or rotated so that the angle between the first area (1221) of the separator sheet (122) and the first upper nozzle (171) is constant.

[0248] Accordingly, when the separator sheet (122) is pressed by the first pressure roller (1301), the height difference or angle between the first upper nozzle (171) and the first region (1221) of the separator sheet (122) can be maintained the same, thereby further improving the reliability of the adhesive applied from the first upper nozzle (171) to the first region (1221) of the separator sheet (122). This can be similarly explained in the case where the second upper nozzle (172) applies adhesive to the second region (1222) of the separator sheet (122) while the separator sheet (122) is pressed by the second pressure roller (1302), as shown in FIGS. 21 and 22.

[0249] FIG. 20 is a schematic diagram showing the application of adhesive to the upper part of the first electrode as the table moves in a straight line in the battery cell manufacturing device of FIG. 18. FIG. 21 is a schematic diagram showing the application of adhesive to the second region of the separator sheet as the table moves in a straight line in the battery cell manufacturing device of FIG. 18.

[0250] Referring to FIGS. 18 to 21, the first upper nozzle (171) and the second upper nozzle (172) may be positioned on both sides with the separator sheet (122) in between.

[0251] That is, the first upper nozzle (171) can form a second adhesive layer (1750) by applying an adhesive to at least a portion of the upper part of the first electrode (1112) before the second region (1222) of the separator sheet (122) covers the upper part of the first electrode (1112) as shown in FIG. 20. Additionally, the second upper nozzle (172) can form a first adhesive layer (1710) by applying an adhesive to at least a portion of the second region (1222) of the separator sheet (122) after the second region (1222) of the separator sheet (122) covers the upper part of the first electrode (1112) as shown in FIG. 21. In this case, the second upper nozzle (172) can apply the adhesive to the second region (1222) of the separator sheet (122) by rotating clockwise.

[0252] In the opposite case, the second upper nozzle (172) can form a second adhesive layer (1750) by applying adhesive to at least a portion of the upper part of the second electrode (1122) before the first region (1221) of the separator sheet (122) covers the upper part of the second electrode (1122). Additionally, the first upper nozzle (171) can form a first adhesive layer (1710) by applying adhesive to at least a portion of the first region (1221) of the separator sheet (122) after the first region (1221) of the separator sheet (122) covers the upper part of the second electrode (1122). In this case, the first upper nozzle (171) can rotate counterclockwise to apply adhesive to the first region (1221) of the separator sheet (122).

[0253] In addition, the description of the adhesive applied from the pair of upper nozzles (17) in this embodiment can be described in the same way as the adhesive applied from the battery cell manufacturing device (1) of FIG. 2 described above.

[0254] In addition, in this embodiment, the table (16) can move in a straight reciprocating motion left and right relative to a pair of upper nozzles (17). That is, the table (16) moves in a straight motion toward the first transfer device (141) or the second transfer device (142) relative to a pair of upper nozzles (17), thereby enabling the application of adhesive to at least a portion of the upper surface of the electrode (11) or the separator sheet (122).

[0255] Additionally, as shown in FIGS. 20 and 21, before the second region (1222) of the separator sheet (122) covers the upper part of the first electrode (1112), the first upper nozzle (171) may apply adhesive to at least a portion of the upper part of the first electrode (1112) to form a second adhesive layer (1750), and at the same time, the second upper nozzle (172) may apply adhesive to at least a portion of the second region (1222) of the separator sheet (122) to form a first adhesive layer (1710). In the opposite case, before the first region (1221) of the separator sheet (122) covers the upper part of the second electrode (1122), the second upper nozzle (172) may apply adhesive to at least a portion of the upper part of the second electrode (1122) to form a second adhesive layer (1750), and at the same time, the first upper nozzle (171) may apply adhesive to at least a portion of the first region (1221) of the separator sheet (122) to form a first adhesive layer (1710).

[0256] Accordingly, in this embodiment, a pair of upper nozzles (17) can each simultaneously apply adhesive to the upper surface of the separator sheet (122) or the electrode (11), thereby reducing the process time of the adhesive application process and further improving process efficiency.

[0257] Additionally, as shown in FIG. 20, a pair of pressure rollers (130) may be spaced apart from a second adhesive layer (1750) formed on the upper part of a first electrode (1112). Accordingly, when the table (16) moves in a straight line, the adhesive applied to the second adhesive layer (1750) formed on the first electrode (1112) can be prevented from coming into direct contact with the pair of pressure rollers (130).

[0258] Additionally, as shown in FIG. 21, the second pressure roller (1302) can press one side of the separator sheet (122) and press the first adhesive layer (1710) and / or the second adhesive layer (1750) between the second region (1222) of the separator sheet (122) and the first electrode (1112) in a direction opposite to the direction of movement of the table (16). Accordingly, 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 separator sheet (122) can be applied more uniformly. This can be explained in the same way when the first pressure roller (1301) presses the first region (1221) of the separator sheet (122) covering the second electrode (1122) on which the first adhesive layer (1710) is formed.

[0259] FIG. 22 is a schematic diagram showing the separator guide moving in a straight line and the second electrode being placed on the second region of the separator sheet in the battery cell manufacturing device of FIG. 18.

[0260] Referring to FIGS. 21 and 22, in this embodiment, the separator sheet (122) can be guided in a folding direction by a separator guide (125). Here, a pair of pressure rollers (130) can assist in guiding the folding direction of the separator sheet (122) by the separator guide (125).

[0261] For example, the separator guide (125) may have a form in which a pair of rollers are arranged horizontally, and the second pressure roller (1302) may press the separator sheet (122) while the separator sheet (122) is inserted between a pair of pressure rollers (130). However, the form of the separator guide (125) is not limited thereto, and any form capable of controlling the folding direction of the separator sheet (122) may be included in this embodiment.

[0262] In addition, in this embodiment, the separator guide (125) may include an upper separator guide (125a) and a lower separator guide (125b) located respectively above and below a pair of upper nozzles (17). For the description of the separator guide (125), refer to the description of the battery cell manufacturing apparatus (1) of FIG. 2 described above. Also, the lower separator guide (125b) will be described in detail with reference to FIG. 27, which will be described later. Additionally, the separator guide (125) may be fixed together with a pair of upper nozzles (17) and a pair of pressure rollers (130). Here, the table (16) moves in a linear reciprocating motion toward the first transfer device (141) and the second transfer device (142) with respect to the separator guide (125), so that the separator sheet (122) guided by the separator guide (125) is folded along the direction of movement of the separator guide (125), so that the separator sheet (122) can cover the electrode (11).

[0263] For example, referring to FIGS. 21 and 22, with the first electrode (1112) seated on the first region (1221) of the separator sheet (122), the table (16) moves in a straight line toward the second transfer device (142) so that the second region (1222) of the separator sheet (122) can cover the upper part of the first electrode (1112).

[0264] Accordingly, as the table (16) moves in a linear reciprocating motion, the folding process of the separator sheet (122) by the separator guide (125) can be performed simultaneously with the adhesive application process of a pair of upper nozzles (17), thereby reducing the process time and further improving process efficiency.

[0266] Using such a unit cell manufacturing device (3), a unit cell manufacturing method according to another embodiment of the present invention can be performed as follows.

[0267] 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) and a plurality of first electrodes (1112) are formed (S301).

[0268] Meanwhile, as the membrane sheet (122) is unwound from the membrane reel (121), adhesive is applied to the first region (1221) of the membrane sheet (122). At this time, the discharge port of the first upper nozzle (171) applies adhesive toward the membrane sheet (122) that has passed through the upper membrane guide (205a). The membrane sheet (122) with the applied adhesive passes through the lower membrane guide (125b) and is placed on the upper surface of the table (16) (S302). At this time, the 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 in a straight line toward the first transfer device (141).

[0269] Additionally, referring to FIGS. 17 and 19, the first header (151) can move linearly onto the table (16) while adsorbing the first electrode (1112). Then, 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 separator sheet (122) on which the first adhesive layer (1710) is formed (S303).

[0270] Additionally, referring to FIGS. 17, 20 and 21, after the first electrode (1112) is placed on the first region (1221) of the separator sheet (122), as the table (16) moves toward the second transfer device (142), the first upper nozzle (171) applies adhesive to the upper portion of the first electrode (1112) to form a second adhesive layer (1750) (S304).

[0271] Additionally, an adhesive is applied to a second region (1222) of a separator sheet (122) unwound from a separator reel (121) to form a first adhesive layer (1710) (S305). The discharge port of the second upper nozzle (172) applies the adhesive toward the separator sheet (122) that has passed through the upper separator guide (205a). The separator sheet (122) with the applied adhesive passes through the lower separator guide (125b). At this time, the adhesive can be applied while one side of the separator sheet (122) is pressed by the second pressure roller (1302), and the table (16) moves toward the second transfer device (142).

[0272] Additionally, referring to FIGS. 17, 21 and 22, as the table (16) moves toward the second transfer device (142) with respect to the separator guide (125), one side of the separator sheet (122) is folded so that the second region (1222) of the separator sheet (122) covers the first electrode (1112) on which the second adhesive layer (1750) is formed (S306).

[0273] 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 invention may be applied in various ways to suit the environment in which it is implemented.

[0274] 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. Subsequently, as shown in FIG. 22, when the second transfer device (142) transfers the second electrode (1122), the second header (152) adsorbs the second electrode (1122). Then, when the second region (1222) of the separator sheet (122) covers the first electrode (1112), the second header (152) adsorbing the second electrode (1122) moves toward the upper part of the second region (1222) and places the second electrode (1122) on the second region (1222) where the first adhesive layer (1710) is formed.

[0275] Then, as with the first upper nozzle (171) of FIG. 20, the second upper nozzle (172) applies adhesive to the upper portion 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 portion of the second electrode (1122).

[0276] Subsequently, as the table (16) moves toward the first transfer device (141) with respect to the separator guide (125), the other side of the separator sheet (122) is folded so that the first region (1221) of the separator sheet (122) covers the second electrode (1122) on which the second adhesive layer (1750) is formed.

[0277] That is, by repeating the above processes, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0279] Hereinafter, an embodiment in which the battery cell manufacturing apparatus of FIG. 18 is partially modified will be described. The battery cell manufacturing apparatus (3a) of this embodiment can be described as being mostly the same as the battery cell manufacturing apparatus (3) described above in FIG. 18 to 22, and below, only the parts that differ from the battery cell manufacturing apparatus (3) will be described.

[0280] FIG. 23 is a schematic diagram showing a battery cell manufacturing device with some modifications to the battery cell manufacturing device of FIG. 18, in which an adhesive is applied to a first area of ​​a separator sheet as the first upper nozzle moves in a straight line.

[0281] Referring to FIG. 23, in the battery cell manufacturing apparatus (3a) of the present embodiment, the table (16a) may be fixed. Accordingly, the electrode (11) and the separator sheet (122) can be stacked on the table (16) while the table (16a) is fixed, so that the alignment of the electrode (11) and the separator sheet (122) can be further improved.

[0282] Additionally, the membrane guide (125), the first upper nozzle (171a), and the second upper nozzle (172a) can move back and forth in a straight line relative to the table (16a). For example, as shown in FIG. 23, as the first upper nozzle (171a) moves in a straight line toward the second transfer device (142) relative to the table (16a), an adhesive can be applied to the first region (1221) of the membrane sheet (122) to form a first adhesive layer (1710).

[0283] Additionally, a pair of pressure rollers (130) can move together with the membrane guide (125), the first upper nozzle (171a), and the second upper nozzle (172a) while pressing one side of the membrane sheet (122). For example, the first pressure roller (1301) can 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 membrane sheet (122). Accordingly, the pair of pressure rollers (130) can maintain the tension of the membrane sheet (122). In addition, the height difference between the first upper nozzle (171a) and the second upper nozzle (172a) and the membrane sheet (122) can be maintained. The pair of pressure rollers (130) will be described in detail with reference to FIG. 28, which will be described later.

[0284] For example, the battery cell manufacturing device (3a) of the present embodiment may further include a moving box (18) that accommodates a separator guide (125), a first upper nozzle (171a), and a second upper nozzle (172a). That is, in the battery cell manufacturing device (3a) of the present embodiment, as the moving box (18) moves, the separator guide (125), the first upper nozzle (171a), and the second upper nozzle (172a) can move simultaneously.

[0285] Accordingly, the gap between the first upper nozzle (171a) and the separator guide (125) and the gap between the second upper nozzle (172a) and the separator guide (125) can be maintained at a constant level, and the reliability of the adhesive applied from the first upper nozzle (171a) and the second upper nozzle (172a) can be improved.

[0286] Additionally, the angle of the first upper nozzle (171a) and / or the second upper nozzle (172a) can be rotated within the moving box (18), or the first upper nozzle (171a) and the second upper nozzle (172a) can be moved to adjust the height difference or angle between the first upper nozzle (171a) and / or the second upper nozzle (172a) and the separator (122). Even in this case, the gap between the first upper nozzle (171a) and the separator guide (125) and the gap between the second upper nozzle (172a) and the separator guide (125) within the moving box (18) can be maintained at the same level, thereby further improving the reliability of the adhesive applied from the first upper nozzle (171a) and the second upper nozzle (172a).

[0288] Using such a battery cell manufacturing device (3a), a battery cell manufacturing method according to another embodiment of the present invention is performed as follows.

[0289] First, referring to FIG. 17 and FIG. 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) and a plurality of first electrodes (1112) are formed (S301).

[0290] Meanwhile, as the membrane sheet (122) is unwound from the membrane reel (121), adhesive is applied to the first region (1221) of the membrane sheet (122). At this time, the discharge port of the first upper nozzle (171) applies adhesive toward the membrane sheet (122) that has passed through the upper membrane guide (205a). The membrane sheet (122) with the applied adhesive passes through the lower membrane guide (125b) and is placed on the upper surface of the table (16) (S302). At this time, the membrane sheet (122) moves while being 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) can move in a straight line toward the second transfer device (142).

[0291] FIG. 24 is a schematic diagram showing the first electrode being placed in the first region of the separator sheet in the battery cell manufacturing apparatus of FIG. 23.

[0292] Additionally, referring to FIGS. 17 and 24, the first header (151) can move linearly onto the table (16) while adsorbing the first electrode (1112). Then, 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 separator sheet (122) on which the first adhesive layer (1710) is formed (S303).

[0293] FIG. 25 is a schematic diagram showing the application of adhesive to the upper portion of the first electrode as the first upper nozzle moves in a straight line in the battery cell manufacturing device of FIG. 23. FIG. 26 is a schematic diagram showing the application of adhesive to the second region of the separator sheet and the placement of the second electrode on the second region of the separator sheet as the second upper nozzle moves in a straight line in the battery cell manufacturing device of FIG. 23.

[0294] Additionally, referring to FIGS. 17, 25 and 26, after the first electrode (1112) is seated in the first region (1221) of the separator sheet (122), as the first upper nozzle (171a) moves toward the first transfer device (141), the first upper nozzle (171a) applies an adhesive to the upper surface of the first electrode (1112) to form a second adhesive layer (1750) (S304).

[0295] Additionally, an adhesive is applied to the second region (1222) of the separator sheet (122) unwound from the separator reel (121) to form a first adhesive layer (1710) (S305). The discharge port of the second upper nozzle (172) applies the adhesive toward the separator sheet (122) that has passed through the upper separator guide (205a). The separator sheet (122) with the applied adhesive passes through the lower separator guide (125b). At this time, the adhesive can be applied while one side of the separator sheet (122) is pressed by the second pressure roller (1302), and the moving box (18) moves toward the first transfer device (141).

[0296] Additionally, with reference to FIGS. 17, 25 and 26, as the separator guide (125) and a pair of pressure rollers (130) move toward the first transfer device (141) relative to the table (16a), one side of the separator sheet (122) is folded so that the second region (1222) of the separator sheet (122) covers the first electrode (1112) on which the second adhesive layer (1750) is formed (S306).

[0297] 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 can be applied in various ways to suit the environment in which the present invention is implemented.

[0298] 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. Subsequently, as shown in FIG. 26, when the second transfer device (142) transfers the second electrode (1122), the second header (152) adsorbs the second electrode (1122). Then, when the second region (1222) of the separator sheet (122) covers the first electrode (1112), the second header (152) adsorbing the second electrode (1122) moves toward the upper part of the second region (1222) and places the second electrode (1122) on the second region (1222) where the first adhesive layer (1710) is formed.

[0299] And, as shown in FIG. 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).

[0300] Subsequently, as the separator guide (125) and a pair of pressure rollers (130) move toward the second transfer device (142) relative to the table (16a), the other side of the separator sheet (122) is folded so that the first region (1221) of the separator sheet (122) covers the second electrode (1122) on which the second adhesive layer (1750) is formed.

[0301] That is, by repeating the above processes, a cell manufacturing method according to another embodiment of the present invention can be performed.

[0303] When performing the cell manufacturing method according to the embodiments of the present invention, when stacking the electrode (11) and the separator sheet (122) in a Z-folding shape, adhesive is applied to the upper and lower parts of the electrode (11), respectively, so that the electrode (11) can be prevented from deviating from its proper position.

[0305] FIG. 27 illustrates an embodiment of a lower separator guide (125b) according to embodiments of the present invention. The lower separator guide (125b) can be applied, for example, to the battery cell manufacturing apparatus (1, 2, 3, 3a) described above. The lower separator guide (125b) may be provided with, for example, a pair of rollers, and FIG. 27 illustrates only one roller for convenience of explanation.

[0306] The lower separator 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 separator (122). When the separator (122) with the adhesive applied passes through the lower separator guide (125b), the adhesive applied to the separator (122) can pass through the recess (1125) area. Accordingly, the surface of the lower separator guide (125b) can be prevented from being contaminated by the adhesive.

[0307] If the lower separator guide (125b) is, for example, a pair of rollers, the concave portion (1125) may preferably be a concave portion formed along the outer surface of the rollers. The shape and structure of the lower separator guide (125b) and the shape and structure of the concave portion (1125) according to the present invention are not limited to those illustrated and can be modified or changed to suit various environments in which the present invention is implemented.

[0309] Additionally, FIG. 28 illustrates an embodiment of a pressure roller (130) according to embodiments of the present invention. The pressure roller (130) can be applied, for example, to 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 separator guide (125b). The recess (1130) of the pressure roller is provided at a position corresponding to the adhesive applied to the separator (122). The adhesive applied to the separator (122) can pass through the recess (1130) of the pressure roller. Accordingly, the surface of the lower separator guide (125b) can be prevented from being contaminated by the adhesive.

[0310] In summary, the adhesive-coated portion of the separator (122) can pass through the recess (1125) of the lower separator guide (125b) and the recess (1130) of the pressure roller (130).

[0311] If the pressure roller (130) is, for example, a roller, the concave portion (1130) may preferably be a concave portion formed along the outer surface of the roller. The shape, structure, number of the pressure roller (130) and the shape, structure, and number of the concave portion (1130) according to the present invention are not limited to those illustrated and may be modified or changed to suit various environments in which the present invention is implemented.

[0313] FIG. 29 is a schematic diagram showing one embodiment of a pressure jig according to the present invention.

[0314] A battery cell manufacturing apparatus (1, 2, 3, 3a) according to embodiments of the present invention may further include a pressurizing jig (200) shown in FIG. 29. An electrode assembly (10) is provided in which electrodes and separator sheets that have undergone a series of steps in the above-described embodiments are stacked alternately, that is, in a zigzag manner.

[0315] After pressing the electrode assembly (10) in a pressure jig (200), the separator is wound. By subjecting the electrode assembly (10), in which electrode and separator sheets are alternately stacked, to a pressing process, the adhesive thickness is minimized and uniformized, thereby improving the winding quality in the subsequent separator winding process. This can increase the rigidity of the finished battery cell.

[0316] Here, the jig pressing process may include a process of applying and releasing pressure with a jig (200) that presses both the top and bottom sides of the electrode assembly (10) stacked in a zigzag manner. That is, the process of applying and releasing pressure with the jig (200) to the electrode assembly (10) in one cycle may be repeated at least twice.

[0317] The process of one cycle in which the jig (200) applies and releases pressure may be a process of directly applying physical force to the adhesive being dissolved by alternating positive and negative pressure. Therefore, the effect of significantly improving the dissolution of the adhesive may be obtained.

[0318] In this case, a control device can be connected to the jig device for more systematic operation. Accordingly, the positive and negative pressure times can be adjusted, and the magnitudes of the positive and negative pressures can also be controlled. This enables the implementation of a more effective adhesive dissolving system.

[0320] FIG. 30 is a cross-sectional view of an electrode assembly according to embodiments of the present invention.

[0321] Referring to FIG. 30, in an electrode assembly (10) in which electrodes and separator sheets according to embodiments 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 twice.

[0322] Here, the separator sheet (122) is folded with the first electrode (1112) seated on the first region (1221) of the separator sheet (122), so that the second region (1222) of the separator (122) covers the first electrode (11). Additionally, the separator sheet (122) is folded with the second electrode (1122) seated on the second region (1222) of the separator sheet (122), so that the first region (1221) of the separator sheet (122) covers the second electrode (1122).

[0323] In particular, in the electrode assembly (10) according to the present embodiment, electrodes (11) can be stacked one by one on a first region (1221) or a second region (1222) of a separator sheet (122). At this time, the electrodes (11) can be stacked at an accurate position on the separator sheet (122) after measuring whether they are misaligned and, if necessary, correcting their position. Accordingly, the alignment degree between the electrodes (11) and the separator sheet (122) in the electrode assembly (10) according to the present embodiment may be further improved.

[0324] 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) is 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).

[0325] For example, the first adhesive layer (1710) and the second adhesive layer (1750) may each be formed by applying an adhesive in the form of multiple dots. However, as described above in the battery cell manufacturing device (1, 2, 3, 3a), the shapes of the first adhesive layer (1710) and the second adhesive layer (1750) are not limited to this and may be formed in various shapes.

[0326] Accordingly, in the electrode assembly (10) according to the present embodiment, an adhesive layer (1700) is formed between the electrode (11) and the separator sheet (122), so that 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, thereby preventing the electrode (11) from deviating from its proper position. In addition, in the electrode assembly (10) of the present embodiment, a single separator sheet (122) covers the upper and lower parts of the electrode (11) in a folded form, so that the alignment of the electrode (11) and the efficiency of the process can be further improved.

[0327] Furthermore, since there is no need to perform a laminating process as in the past, the defect rate caused by high heat and pressure can be reduced. In addition, since the laminator can be eliminated, the volume of the manufacturing equipment can be reduced and the manufacturing process can be simplified.

[0329] FIG. 31 is an exploded perspective view of a battery cell according to one embodiment of the present invention.

[0330] Referring to FIG. 30 and FIG. 31, a battery cell according to another embodiment of the present invention is a battery cell comprising the electrode assembly (10) described above, and comprises a battery case (50) that accommodates the electrode assembly (10) together with an electrolyte, and an adhesive layer (1700) is dissolved in the electrolyte.

[0331] Here, a fixing member, such as a fixing tape (30), may be attached to the outer side of the electrode assembly (10). Accordingly, the stacked alignment state of the electrode (11) and the separator sheet (122) can be maintained. The electrode assembly (10) to which such a fixing tape (30) is attached may be referred to as the final electrode assembly (20).

[0332] The battery case (50) includes a storage portion (60) in which an electrode assembly (10) or a final electrode assembly (20) is mounted, and a sealing portion (70) that seals the outer periphery of the storage portion (60). As an example, the battery case (50) may be a laminate sheet comprising a resin layer and a metal layer. More specifically, the battery case (50) may be made of a laminate sheet and may be composed of an outer resin layer forming the outermost layer, a barrier metal layer that prevents the penetration of material, and an inner resin layer for sealing.

[0333] Additionally, the storage portion (60) of the battery case (50) may contain an electrolyte together with the electrode assembly (10). Here, the adhesive layer (1700) included in the electrode assembly (10) may be dissolved into the electrolyte. In particular, in the battery cell according to the present embodiment, the adhesive layer (1700) included in the electrode assembly (10) may be dissolved into the electrolyte under high temperature and / or pressurized conditions during an activation process such as a formation process.

[0334] More specifically, in the battery cell according to the present embodiment, when the adhesive layer (1700) formed between the electrode (11) of the electrode assembly (10) and the separator sheet (122) is dissolved into the electrolyte, the adhesive (14) may be almost entirely removed or completely gone from the surface of the electrode (11).

[0335] In contrast, since the separator sheet (122) is generally a porous sheet, some of the adhesive (14) may have penetrated into the separator sheet (122). However, even in the case of the adhesive layer (1700) that has penetrated into the separator sheet (122), most of it may be dissolved into the electrolyte or all of it may be dissolved, and in this process, traces of the adhesive layer (1700) may remain on the separator sheet (122).

[0336] Here, the application trace of the adhesive layer (1700) may mean that although no adhesive component contained in the adhesive layer (1700) remains, a portion of the outer surface of the separator sheet (122) has been deformed by the adhesive layer (1700). However, it is not limited thereto, and the application trace of the adhesive layer (1700) may mean a trace that allows the application of the adhesive to be confirmed in various ways, such as a trace that allows the application of the adhesive to be confirmed visually. Accordingly, the application trace of the adhesive layer (1700) formed on the separator sheet (122) may be formed at the same location as where the adhesive is applied.

[0337] Accordingly, in the battery cell according to the present embodiment, the adhesive layer (1700) is dissolved on the surface of the electrode (11) or the separator (122), so that the unreacted area caused by the adhesive layer (1700) disappears, preventing performance degradation and enabling excellent battery performance.

[0338] Although 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 by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0340] 1, 1a: Cell manufacturing device 11: Electrode 16, 16a: Table 17: Nozzle 111: First electrode reel 112: Second electrode reel 121: Separator Reel 122: Separator sheet 125: Separator Guide 125a: Upper separator guide 125b: Lower separator guide 1125: Concave part 130: Pressure roller 1130: Concave part 131: 1st Cutter 132: 2nd Cutter 141: First transfer device 142: Second transfer device 151: 1st header 152: 2nd Header 171, 171a: First upper nozzle 172, 172a: Second upper nozzle 1111: First electrode sheet 1112: First electrode 1121: Second electrode sheet 1122: Second electrode 1221: First Zone 1222: Second Zone 1710: First adhesive layer 1750: Second adhesive layer

Claims

Claim 1 A battery cell manufacturing apparatus comprising: an electrode reel from which an electrode sheet having a plurality of electrodes formed is unwound; a separator reel from which a separator sheet is unwound, which is folded when the electrode is placed thereon to cover the electrode and laminate with the electrode; a table on which the electrode and the separator sheet are placed on an upper surface; a pair of separator guides guiding the folding direction of the separator sheet; and a pair of upper nozzles for applying an adhesive to at least a portion of the separator sheet passing between the pair of separator guides, wherein among the pair of separator guides, the first separator guide guiding the separator sheet to which the adhesive is applied includes at least one concave portion, and the concave portion is provided at a position corresponding to the adhesive applied to the separator sheet. Claim 2 delete Claim 3 A battery cell manufacturing apparatus according to claim 1, wherein the adhesive is applied in a dot or line form along the longitudinal direction of the separator sheet. Claim 4 A battery cell manufacturing apparatus according to claim 1 or 3, wherein the pair of upper nozzles can rotate to apply an adhesive to at least a portion of the electrode seated on the table, and the pair of separator guides and the pair of upper nozzles move in a linear reciprocating motion left and right relative to the table, and the table is fixed. Claim 5 In claim 4, the electrode reel comprises: a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound. Claim 6 A battery cell manufacturing apparatus according to claim 5, wherein the pair of upper nozzles comprises a first upper nozzle and a second upper nozzle, the first upper nozzle applies the adhesive to the separator sheet passing through the first electrode upper or the pair of separator guides, and the second upper nozzle applies the adhesive to the separator sheet passing through the second electrode upper or the pair of separator guides. Claim 7 In claim 6, the first upper nozzle and the second upper nozzle are arranged on both sides with the pair of separator guides in between in a battery cell manufacturing device. Claim 8 A battery cell manufacturing apparatus according to claim 6, wherein the first electrode is placed on a first region of the separator sheet and the second electrode is placed on a second region of the separator sheet. Claim 9 A battery cell manufacturing apparatus according to claim 8, wherein when the first electrode is placed on a first region of the separator sheet, the first upper nozzle moves linearly on the first electrode, and when the second electrode is placed on a second region of the separator sheet, the second upper nozzle moves linearly on the second electrode. Claim 10 A battery cell manufacturing apparatus according to claim 9, wherein when the first upper nozzle applies the adhesive to at least a portion of the upper portion of the first electrode, the first separator guide moves linearly in a direction in which the separator sheet covers the first electrode, and when the second upper nozzle applies the adhesive to at least a portion of the upper portion of the second electrode, the first separator guide moves linearly in a direction in which the separator sheet covers the second electrode. Claim 11 A battery cell manufacturing apparatus according to claim 8, comprising a lower nozzle for applying the adhesive to the lower part of the first electrode and the lower part of the second electrode, respectively. Claim 12 A battery cell manufacturing apparatus according to claim 11, further comprising: a first header that adsorbs the first electrode and settles it in the first region; and a second header that adsorbs the second electrode and settles it in the second region. Claim 13 A battery cell manufacturing apparatus according to claim 12, wherein when the first electrode is adsorbed to the first header, the lower nozzle applies the adhesive to the lower portion of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle applies the adhesive to the lower portion of the second electrode. Claim 14 A battery cell manufacturing apparatus according to claim 11, further comprising: a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table. Claim 15 A battery cell manufacturing apparatus according to claim 14, wherein the first transfer device comprises a first groove open toward the first electrode, and the lower nozzle applies the adhesive to the lower part of the first electrode through the first groove, and the second transfer device comprises a second groove open toward the second electrode, and the lower nozzle applies the adhesive to the lower part of the second electrode through the second groove. Claim 16 A battery cell manufacturing apparatus according to claim 1 or 3, wherein the electrode reel comprises: a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound; wherein the table rotates back and forth between the first electrode reel and the second electrode reel, and the pair of separator guides and the pair of upper nozzles move in a linear back and forth relative to the table. Claim 17 A battery cell manufacturing apparatus according to claim 16, wherein the first electrode is placed on a first region of the separator sheet and the second electrode is placed on a second region of the separator sheet. Claim 18 A battery cell manufacturing apparatus according to claim 17, wherein the pair of upper nozzles comprises a first upper nozzle and a second upper nozzle, the first upper nozzle applies the adhesive to at least a portion of a second region of the separator sheet passing between the pair of separator guides, and the second upper nozzle applies the adhesive to at least a portion of a first region of the separator sheet passing between the pair of separator guides. Claim 19 A battery cell manufacturing apparatus according to claim 18, wherein when the pair of upper nozzles each apply an adhesive onto the separator sheet, the discharge port of the first upper nozzle or the discharge port of the second upper nozzle rotates in a direction adjacent to the separator sheet. Claim 20 In claim 18, the first upper nozzle and the second upper nozzle are arranged on both sides with the pair of separator guides in between in a battery cell manufacturing device. Claim 21 A battery cell manufacturing apparatus according to claim 18, wherein, at the same time as the first electrode is placed on the first region of the separator sheet, the first upper nozzle moves linearly away from the table on the second region of the separator sheet, and at the same time as the second electrode is placed on the second region of the separator sheet, the second upper nozzle moves linearly away from the table on the first region of the separator sheet. Claim 22 A battery cell manufacturing apparatus according to claim 21, wherein the first upper nozzle applies the adhesive to at least a portion of the second region of the separator sheet while the pair of separator guides move linearly toward the second electrode reel, and the second upper nozzle applies the adhesive to at least a portion of the first region of the separator sheet while the pair of separator guides move linearly toward the first electrode reel. Claim 23 A battery cell manufacturing apparatus according to claim 22, wherein when the adhesive application of the first upper nozzle is completed, the pair of separator guides move in a straight line in a direction in which the second region of the separator sheet to which the adhesive is applied covers the first electrode, and when the adhesive application of the second upper nozzle is completed, the pair of separator guides move in a straight line in a direction in which the first region of the separator sheet to which the adhesive is applied covers the second electrode. Claim 24 A battery cell manufacturing apparatus according to claim 16, comprising a lower nozzle for applying the adhesive to the lower part of the first electrode and the lower part of the second electrode, respectively. Claim 25 A battery cell manufacturing apparatus according to claim 24, further comprising: a first header that adsorbs the first electrode and settles it in a first region of the separator sheet; and a second header that adsorbs the second electrode and settles it in a second region of the separator sheet, wherein the first header and the second header rotate and reciprocate in a direction located on the table. Claim 26 A battery cell manufacturing apparatus according to claim 25, wherein when the first electrode is adsorbed to the first header, the lower nozzle applies the adhesive to the lower portion of the first electrode, and when the second electrode is adsorbed to the second header, the lower nozzle applies the adhesive to the lower portion of the second electrode. Claim 27 A battery cell manufacturing apparatus according to claim 24, further comprising: a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table. Claim 28 A battery cell manufacturing apparatus according to claim 27, wherein the first transfer device comprises a first groove open toward the first electrode, and the lower nozzle applies the adhesive to the lower part of the first electrode through the first groove, and the second transfer device comprises a second groove open toward the second electrode, and the lower nozzle applies the adhesive to the lower part of the second electrode through the second groove. Claim 29 A battery cell manufacturing apparatus according to claim 1 or 3, wherein the pair of upper nozzles can rotate to apply an adhesive to at least a portion of the electrode seated on the table, and the pair of pressure rollers that press the separator sheet guided by the pair of separator guides. Claim 30 In claim 29, the pressure roller comprises at least one concave portion on its surface, and the concave portion is provided at a position corresponding to the adhesive applied to the separator sheet, in a battery cell manufacturing device. Claim 31 In paragraph 30, the battery cell manufacturing device wherein at least one pressure roller is located between the pair of separator guides and the table. Claim 32 In claim 31, the battery cell manufacturing device wherein at least one pressure roller is located between the pair of separator guides. Claim 33 In claim 32, the electrode reel comprises: a first electrode reel from which a first electrode sheet having a plurality of first electrodes formed thereon is unwound; and a second electrode reel from which a second electrode sheet having a plurality of second electrodes formed thereon is unwound. Claim 34 A battery cell manufacturing apparatus according to claim 33, further comprising: a first transfer device for transferring the first electrode toward the table; and a second transfer device for transferring the second electrode toward the table. Claim 35 In paragraph 33, the above pair of upper nozzles includes a first upper nozzle and a second upper nozzle, and the above pair of upper nozzles each apply an adhesive to the separator sheet or the electrode located on the table, in a battery cell manufacturing device. Claim 36 In paragraph 35, the battery cell manufacturing device wherein the first upper nozzle and the second upper nozzle are positioned on both sides with the separator guide in between. Claim 37 A battery cell manufacturing apparatus according to claim 36, wherein the at least one pressure roller comprises a first pressure roller and a second pressure roller, the first pressure roller is located between the first upper nozzle and the separator guide, and the second pressure roller is located between the second upper nozzle and the separator guide. Claim 38 A battery cell manufacturing apparatus according to claim 34, wherein the first electrode is placed on a first region of the separator sheet and the second electrode is placed on a second region of the separator sheet. Claim 39 A battery cell manufacturing apparatus according to claim 38, further comprising: a first header that adsorbs the first electrode and settles it in the first region; and a second header that adsorbs the second electrode and settles it in the second region. Claim 40 A battery cell manufacturing apparatus according to claim 38, wherein the pair of separator guides, the pair of upper nozzles, and at least one pressure roller are fixed, and the table moves in a straight reciprocating motion toward the first transfer device and the second transfer device. Claim 41 In claim 38, the above table is fixed, and the above pair of separator guides, the above pair of upper nozzles, and the above at least one pressure roller reciprocate in a straight line toward the first transfer device and the second transfer device, in a battery cell manufacturing device. Claim 42 A battery cell manufacturing apparatus according to claim 40, further comprising a moving box that accommodates the pair of separator guides and the pair of upper nozzles inside. Claim 43 A method for manufacturing a battery cell comprising: a step of cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; a step of applying an adhesive to a first region of a separator sheet unwound from a separator reel between a pair of separator guides, wherein the first upper nozzle applies an adhesive to the first region of the separator sheet and the separator sheet is placed on a table along the separator guides; a step of placing the first electrode on the first region of the separator sheet; a step of applying an adhesive to the upper portion of the first electrode by the first upper nozzle; and a step of folding the separator sheet in a folding direction guided by the separator guides so that a second region of the separator sheet covers the first electrode, wherein among the pair of separator guides, the first separator guide that guides the separator sheet to which the adhesive is applied includes at least one concave portion, and the concave portion is provided at a position corresponding to the adhesive applied to the separator sheet. Claim 44 A method for manufacturing a battery cell according to claim 43, further comprising the step of applying an adhesive to the lower part of the first electrode using a lower nozzle prior to the step of seating the first electrode in the first region of the separator sheet. Claim 45 A method for manufacturing a battery cell according to claim 43, further comprising: a step of forming a plurality of second electrodes by cutting a second electrode sheet unwound from a second electrode reel after the step of covering the upper part of the first electrode; a step of applying an adhesive to the lower part of the second electrode with a lower nozzle; a step of seating the second electrode on a second region of the separator sheet; a step of applying an adhesive to the upper part of the second electrode with a second upper nozzle; and a step of 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. Claim 46 A method for manufacturing a battery cell according to claim 45, wherein the table is fixed, and the pair of separator guides, the first upper nozzle, and the second upper nozzle reciprocate in a straight line relative to the table. Claim 47 A method for manufacturing a battery cell comprising: cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; placing a separator sheet unwound from a separator reel onto a table along a pair of separator guides; applying an adhesive to the lower portion of the first electrode using a lower nozzle; placing the first electrode onto a first region of the separator sheet; applying an adhesive to at least a portion of the second region of the separator sheet between the pair of separator guides using a first upper nozzle; and folding the separator sheet in a folding direction guided by the separator guides so that the second region of the separator sheet to which the adhesive is applied covers the first electrode. Claim 48 A method for manufacturing a battery cell according to claim 47, further comprising: a step of forming a plurality of second electrodes by cutting a second electrode sheet unwound from a second electrode reel after the step of covering the upper part of the first electrode; a step of applying an adhesive to the lower part of the second electrode with a lower nozzle; a step of seating the second electrode in a second region of the separator sheet; a step of applying an adhesive to at least a part of the first region of the separator sheet between the pair of separator guides with a second upper nozzle; and a step of folding the separator sheet in a folding direction guided by the separator guide so that the first region of the separator sheet with the applied adhesive covers the second electrode. Claim 49 A method for manufacturing a battery cell according to claim 48, wherein the table reciprocates in rotation between the first electrode reel and the second electrode reel, and the separator guide and the pair of upper nozzles reciprocate in a straight line from left to right relative to the table. Claim 50 A method for manufacturing a battery cell according to claim 49, wherein in the step of applying an adhesive with the first upper nozzle and the step of applying an adhesive with the second upper nozzle, the discharge port of the first upper nozzle or the discharge port of the second upper nozzle rotates in a direction adjacent to the separator sheet. Claim 51 A method for manufacturing a battery cell comprising: a step of cutting a first electrode sheet unwound from a first electrode reel to form a plurality of first electrodes; a step of applying an adhesive between a pair of separator guides to a first region of a separator sheet unwound from a separator reel, and the separator sheet being placed on a table along the separator guides; a step of placing the first electrode on the first region of the separator sheet; a step of applying an adhesive to the upper portion of the first electrode by the first upper nozzle; and a step of folding the separator sheet in a folding direction guided by the separator guides so that a second region of the separator sheet covers the first electrode, wherein a first pressure roller presses the separator sheet guided by the separator guides, and among the pair of separator guides, the first separator guide guiding the separator sheet to which the adhesive is applied includes at least one concave portion, and the concave portion is provided at a position corresponding to the adhesive applied to the separator sheet. Claim 52 A method for manufacturing a battery cell according to claim 51, further comprising the steps of: cutting a second electrode sheet unwound from a second electrode reel to form a plurality of second electrodes after the step of covering the upper portion of the first electrode; applying an adhesive to a second region of the separator sheet between a pair of separator guides using a second upper nozzle; seating the second electrode on the second region of the separator sheet; applying an adhesive to the upper portion of the second electrode using the second upper nozzle; and 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, wherein a second pressure roller presses the separator sheet guided by the separator guide. Claim 53 A method for manufacturing a battery cell according to claim 52, wherein the separator guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller are fixed, and the table moves in a linear reciprocating motion toward a first transfer device that transfers the first electrode toward the table and a second transfer device that transfers the second electrode toward the table. Claim 54 A method for manufacturing a battery cell according to claim 53, wherein the table is fixed, and the separator guide, the first upper nozzle, the second upper nozzle, the first pressure roller, and the second pressure roller reciprocate in a straight line toward the first transfer device and the second transfer device. Claim 55 A method for manufacturing a battery cell according to claim 47, wherein, among the pair of separator guides, the first separator guide that guides the separator sheet coated with the adhesive comprises at least one recess, and the recess is provided at a position corresponding to the adhesive coated on the separator sheet. Claim 56 A method for manufacturing a battery cell in which, in any one of claims 43, 51, or 55, the adhesive is applied in a dot or line form along the longitudinal direction of the separator sheet. Claim 57 A method for manufacturing a battery cell according to claim 51, wherein the pressure roller comprises at least one concave portion on its surface, and the concave portion is provided at a position corresponding to the adhesive applied to the separator sheet. Claim 58 An electrode assembly manufactured by a method for manufacturing a battery cell according to any one of claims 43, 47, and 51, wherein an electrode and a separator sheet are alternately stacked, wherein the electrode comprises a first electrode and a second electrode, and the separator sheet has a zigzag shape formed by folding at least twice, wherein the separator sheet is folded with the first electrode seated on a first region of the separator sheet so that the second region of the separator sheet covers the first electrode, and the separator sheet is folded with the second electrode seated on the second region so that the first region of the separator sheet covers the second electrode, and an adhesive layer is formed between the electrode and the separator sheet. Claim 59 In claim 58, the adhesive layer comprises a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is located between the lower part of the electrode and the separator sheet, and the second adhesive layer is located between the upper part of the electrode and the separator sheet, forming an electrode assembly. Claim 60 In claim 59, the first adhesive layer and the second adhesive layer are each formed by applying an adhesive in the form of a plurality of dots to an electrode assembly. Claim 61 A battery cell comprising an electrode assembly of claim 58, a battery case that accommodates the electrode assembly together with an electrolyte, and an adhesive layer that dissolves in the electrolyte.

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