KR102643621B1 - Electrode Assembly, The Apparatus For Manufacturing The Same And The Method For Manufacturing The Same - Google Patents

Abstract

An electrode assembly manufacturing apparatus according to an embodiment of the present invention includes a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed; a second electrode supply unit provided with a second electrode sheet on which a plurality of second electrodes are formed; A separator supply unit that is folded when the first electrode or the second electrode is seated and is provided with a separator sheet that covers the electrode and is stacked with the electrode; A table for seating the first electrode and the second electrode on a top surface to form the electrode assembly, with the separator sheet folded between the first electrode and the second electrode; A separator guide that guides the folding direction of the separator sheet; and a pair of upper applicators for applying adhesive to at least a portion of the separator sheet positioned between the table and the separator guide, wherein the table rotates between the first electrode supply unit and the second electrode supply unit. It reciprocates, and the separator guide and the pair of upper applicators reciprocate linearly left and right with respect to the table.

Description

Electrode assembly, apparatus for manufacturing the same, and method for manufacturing the same {Electrode Assembly, The Apparatus For Manufacturing The Same And The Method For Manufacturing The Same}

The present invention relates to an electrode assembly, an apparatus for manufacturing the same, and a method for manufacturing the same. More specifically, it relates to a battery cell in which electrodes and separator sheets are stacked in a Z-folding manner, wherein the electrodes can be prevented from leaving their original positions. It relates to an electrode assembly, an apparatus for manufacturing the same, and a method for manufacturing the same.

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 for small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, Portable Game Devices, Power Tools, and E-bikes, but also for large products requiring high output such as electric vehicles and hybrid vehicles, as well as for surplus power generation. It is also applied and used in power storage devices that store power or renewable energy and backup power storage devices.

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

Electrode assemblies are classified into various types. For example, the simple stack type is to simply stack the anode, separator, and cathode by alternating them instead of manufacturing the unit cell. First, the unit cell is manufactured using the anode, separator, and cathode, and then these unit cells are Lamination & Stack Type (L&S), where multiple unit cells are spaced apart and attached to one side of a separator sheet that is long on one side, and the separator sheet is repeatedly folded from one end in the same direction. Type (S&F, Stack & Folding Type), a plurality of electrodes or unit cells are alternately attached to one side and the other side of a separator sheet that is long on one side, and the separator sheet is folded in a specific direction from one end and then folded in the opposite direction. There is a Z-Folding Type that repeats the method alternately. Among these, the Z-folding type has been frequently used recently due to its high degree of alignment and impregnation with electrolyte.

However, in the past, a separate laminating process was not performed after stacking the electrode and the separator sheet in this Z-folding type, so there was a problem in which the electrode and the separator sheet were not adhered to each other, causing the electrode to deviate from its original position. To solve this problem, a separate laminating process was performed after stacking the electrodes and separator sheets. However, since the overall thickness of the laminate with the electrodes and separator sheets has increased, heat is not transmitted to the inside of the laminate, resulting in poor adhesion. There was a problem with deterioration. Additionally, in order to perform this separate laminating process, there was a problem in which the electrodes were moved out of their original positions during the process of transporting the laminate. This problem became more severe when the adhesive strength of the separator sheet itself was low, depending on the material of the separator sheet.

Accordingly, there is a need to develop a battery cell including a Z-folding electrode assembly with improved battery cell performance while preventing the electrode from moving out of position, a manufacturing device thereof, and a manufacturing method thereof.

The problem to be solved by the present invention is to provide an electrode assembly in which an electrode and a separator sheet are stacked in a Z-folding manner, and an electrode assembly that can prevent the electrode from leaving its position, an apparatus for manufacturing the same, and a method for manufacturing the same. It is done.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and problems not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings. .

An electrode assembly manufacturing apparatus according to an embodiment of the present invention includes a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed; a second electrode supply unit provided with a second electrode sheet on which a plurality of second electrodes are formed; A separator supply unit that is folded when the first electrode or the second electrode is seated and is provided with a separator sheet that covers the electrode and is stacked with the electrode; A table for seating the first electrode and the second electrode on a top surface to form the electrode assembly, with the separator sheet folded between the first electrode and the second electrode; A separator guide that guides the folding direction of the separator sheet; and a pair of upper applicators for applying adhesive to at least a portion of the separator sheet positioned between the table and the separator guide, wherein the table rotates between the first electrode supply unit and the second electrode supply unit. The separator guide and the pair of upper nozzles reciprocate in a straight line from side to side with respect to the table.

The first electrode may be seated on a first area of the separator sheet, and the second electrode may be seated on a second area of the separator sheet.

The pair of upper applicators include a first upper nozzle and a second upper nozzle, wherein the first upper nozzle applies the adhesive to at least a portion of the second region of the separator sheet, and the second upper nozzle applies the adhesive to the second region of the separator sheet. The adhesive may be applied to at least a portion of the first area of the separator sheet.

When the pair of upper applicators respectively apply adhesive on the separator sheet, the end of the first upper nozzle or the end of the second upper nozzle may rotate in a direction adjacent to the separator sheet.

The first upper nozzle and the second upper nozzle may be disposed on both sides with the separator guide interposed therebetween.

At the same time as the first electrode is seated on the first area of the separator sheet, the first upper nozzle moves linearly on the second area of the separator sheet, and the second electrode is positioned on the second area of the separator sheet. At the same time as being seated, the second upper nozzle may move linearly on the first area of the separator sheet.

At the same time that the first upper nozzle applies the adhesive to at least a portion of the second region of the separator sheet, the separator guide moves linearly in a direction toward the second electrode reel, and At the same time that the second upper nozzle applies the adhesive to at least a portion of the adhesive, the separator guide may move linearly in a direction toward the first electrode reel.

When adhesive application to the first upper nozzle is completed, the separator guide moves straight in the direction in which the second area of the separator sheet to which the adhesive is applied covers the first electrode, and adhesive application to the second upper nozzle When completed, the separator guide moves straight in the direction where the first area of the separator sheet to which the adhesive is applied covers the second electrode.

It includes a lower applicator for applying the adhesive to the lower part of the first electrode and the lower part of the second electrode, respectively.

a first header that adsorbs the first electrode and seats it in the first area; and a second header that adsorbs the second electrode and seats it in the second area, wherein the first header and the second header rotate and reciprocate in the direction in which they are positioned on the table.

When the first electrode is adsorbed to the first header, the lower applicator applies the adhesive to the lower part of the first electrode, and when the second electrode is adsorbed to the second header, the lower applicator applies the adhesive to the lower part of the first electrode. Apply the adhesive to the lower part of the electrode.

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.

The first transfer device includes 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 includes a second groove open toward the second electrode, and the lower applicator applies the adhesive to the lower part of the second electrode through the second groove.

A method of manufacturing an electrode assembly according to another embodiment of the present invention includes cutting a first electrode sheet provided from a first electrode supply unit to form a plurality of first electrodes; A step of seating the separator sheet provided from the separator supply unit on the table along the separator guide; applying adhesive to the lower part of the first electrode by a lower applicator; Seating the first electrode on the first area of the separator sheet; applying adhesive to at least a portion of the second area of the separator sheet using a first upper nozzle; and folding the separator sheet in a folding direction guided by a separator guide, so that the second area of the separator sheet to which the adhesive is applied covers the first electrode.

After covering the top of the first electrode, cutting the second electrode sheet provided from the second electrode supply unit to form a plurality of second electrodes; applying adhesive to the lower part of the second electrode by a lower applicator; Seating the second electrode on the second area of the separator sheet; applying adhesive to at least a portion of the first area of the separator sheet using a second upper nozzle; and folding the separator sheet in a folding direction guided by the separator guide, so that the first area of the separator sheet to which the adhesive is applied covers the second electrode.

The table rotates and reciprocates between the first electrode supply unit and the second electrode supply unit, and the separator guide and the pair of upper applicators linearly reciprocate left and right based on the table.

In the step of applying the adhesive by the first upper nozzle and the step of applying the adhesive by the second upper nozzle, the end of the first upper nozzle or the end of the second upper nozzle is oriented in a direction adjacent to the separator sheet. Make a rotational movement.

An electrode assembly in which electrodes and separator sheets are alternately stacked according to another embodiment of the present invention, wherein the electrode includes a first electrode and a second electrode, and the separator sheet has a zigzag shape formed by folding at least twice. The separator sheet is folded with the first electrode seated on the 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 first electrode seated on the first region of the separator sheet. The second electrode is folded in a seated state so that the first area of the separator sheet covers the second electrode, and an adhesive layer is formed between the electrode and the separator sheet.

The adhesive layer includes a first adhesive layer and a second adhesive layer, the first adhesive layer is located between the bottom of the electrode and the separator sheet, and the second adhesive layer may be located between the top of the electrode and the separator sheet. .

A battery cell according to another embodiment of the present invention is a battery cell including the electrode assembly described above, and includes a battery case that accommodates the electrode assembly together with an electrolyte solution, and the adhesive layer is dissolved in the electrolyte solution.

According to embodiments, the present invention is an electrode assembly, an apparatus for manufacturing the same, and a method for manufacturing the same, in which an electrode and a separator sheet are stacked in a Z-folding manner, and adhesive is pre-applied on the top and bottom of the electrode, wherein the electrode is Leaving the position can be prevented.

The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings.

1 is a flowchart of a method for manufacturing an electrode assembly according to an embodiment of the present invention.
Figure 2 is a schematic diagram showing the first electrode being seated on the first region of the separator sheet in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 3 is a schematic diagram showing applying an adhesive to the bottom of a first electrode in an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing applying an adhesive to the bottom of a first electrode in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.
5 and 6 show that in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, as the table rotates, the separator guide and the first upper nozzle move linearly, and the first upper nozzle rotates to move in the second area. This is a schematic diagram showing how to apply adhesive.
Figure 7 is a schematic diagram showing the second area coated with adhesive covering the first electrode while the separator guide moves linearly in the opposite direction in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 8 is a schematic diagram showing a second electrode being seated on a second region of a separator sheet in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 9 is a cross-sectional view of an electrode assembly according to an embodiment of the present invention.
Figure 10 is an exploded perspective view of a battery cell according to an embodiment of the present invention.

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

In order to clearly explain the present invention, parts that are not relevant to the description are omitted, and identical or similar components are assigned the same reference numerals throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the present invention is not necessarily limited to what is shown. In the drawing, the thickness is enlarged to clearly express various layers and areas. And in the drawings, for convenience of explanation, the thicknesses of some layers and regions are exaggerated.

In addition, throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

In addition, throughout the specification, when referring to “on a plane,” this means when the target portion is viewed from above, and when referring to “in cross section,” this means when a cross section of the target portion is cut vertically and viewed from the side.

Below, a method for manufacturing a battery cell according to an embodiment of the present invention will be described.

1 is a flowchart of a method for manufacturing an electrode assembly according to an embodiment of the present invention. Figure 2 is a schematic diagram showing the first electrode being seated on the first region of the separator sheet in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

An electrode assembly manufacturing apparatus according to an embodiment of the present invention includes a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed, and a second electrode sheet on which a plurality of second electrodes are formed. A separator provided with a two-electrode supply unit, a separator sheet that folds when the first electrode or the second electrode is seated, covers the first electrode or the second electrode, and is stacked with the first electrode or the second electrode. A supply unit, a table on which the first electrode, the second electrode, and the separator sheet are seated on the upper surface, a separator guide that guides the folding direction of the separator sheet, and the separator sheet positioned between the table and the separator guide. and a pair of upper applicators for applying adhesive to at least a portion of the table, wherein the table rotates and reciprocates between the first electrode supply unit and the second electrode supply unit, and the separator guide and the pair of upper applicators The device reciprocates in a straight line left and right based on the table.

Referring to Figures 1 and 2, the electrode assembly manufacturing method according to an embodiment of the present invention includes cutting electrode sheets 1111 and 1121 to form electrodes 11 (S101); Seating the separator sheet 122 on the table 16 (S102); Applying adhesive to the bottom of the electrodes 1112 and 1122 (S103); Seating the electrodes 1112 and 1122 on the separator sheet 122 (S104); Applying adhesive to the separator sheet 122 (S104); and folding the adhesive-coated separator sheet 122 to cover the electrodes 1112 and 1122 (S105).

Accordingly, in the electrode assembly manufacturing method according to this embodiment, when stacking the electrode 11 and the separator sheet 122 in a Z-folding manner, the upper and lower parts of the electrode 11 in contact with the separator sheet 122 are Since adhesive is applied to each electrode, it is possible to prevent the electrodes 11 from leaving their original positions.

Hereinafter, each step shown in the flowchart of FIG. 1 will be described in detail with reference to FIGS. 2 to 7.

An electrode assembly manufacturing apparatus 1 according to an embodiment of the present invention includes electrode reels 111 and 112 from which electrode sheets on which a plurality of electrodes 11 are formed are unwound; A separator reel 121 that is folded when the electrode 11 is seated and the separator sheet 122 that covers the electrode 11 and is stacked with the electrode 11 is unwound; a table 16 on which the electrode 11 and the separator sheet 122 are seated; and a separator guide 125 that guides the folding direction of the separator sheet 122; It includes a pair of upper nozzles 17 for applying adhesive located between the table 16 and the separator guide 125. The electrode reels 111 and 112 may be an example of the electrode supply unit described above, and the separator reel 121 may be an example of the separator supply unit described above. Additionally, the pair of upper nozzles 17 may be an example of the upper applicator described above.

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

The electrode reels 111 and 112 are reels on which the electrode sheets 1111 and 1121 are wound, and the electrode sheets 1111 and 1121 are unwound from the electrode reels 111 and 112. Then, the electrode sheets 1111 and 1121 are cut to form the electrode 11. More specifically, according to this 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 112. In addition, the second electrode reel 112 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 112.

Here, the electrode sheets 1111 and 1121 may be manufactured by applying a slurry of an electrode active material, a conductive material, and a binder onto an electrode current collector, then drying and pressing the slurry. However, the method for manufacturing the electrode sheets 1111 and 1121 is not limited to this, and any method for manufacturing the electrode sheets 1111 and 1121 generally used in the relevant technical field may be included in the present embodiment.

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 an anode, the second electrode 1122 may be a cathode. As another example, if the first electrode 1112 is a cathode, the second electrode 1122 may be an anode.

The separator reel 121 is a reel on which the separator sheet 122 is wound, and the separator sheet 122 is unwound from the separator reel 121. Thereafter, the separator sheet 122 is stacked with the electrode 11 formed by cutting the electrode sheets 1111 and 1121. Here, the electrode 11 and the separator sheet 122 are stacked in a Z-folding manner. More specifically, in this embodiment, when the first electrode 1112 is seated on the separator sheet 122, one side is folded to cover the first electrode 1112, and when the second electrode 1122 is seated, the other side is folded. and covers the second electrode 1122. The separator sheet 122 may have a zigzag shape.

The table 16 may be stacked with the electrode 11 and the separator sheet 122 seated on the top surface. More preferably, the upper surface of the table 16 is formed to be substantially flat, so that the electrodes 11 and the separator sheet 122 can be stably stacked.

The table 16 may be disposed between the first electrode reel 111 and the second electrode reel 112. More specifically, the table 16 may rotate and reciprocate between the first electrode reel 111 and the second electrode reel 112. As an example, the table 16 may rotate and reciprocate between the first electrode reel 111 and the second electrode reel 112 in an angle range of 0 degrees to 180 degrees with respect to the floor surface. However, the rotation angle of the table 16 is not limited to this and may be rotated at various angles.

Accordingly, the table 16 rotates and reciprocates between the first electrode reel 111 and the second electrode reel 112, allowing the electrodes 11 to be more quickly stacked on the table 16 and the separator. Since the guide 125 can assist in folding the separator sheet 122, process speed and efficiency can be further improved.

The electrode assembly manufacturing apparatus 1 according to this embodiment includes a first transfer device 141 that transfers the first electrode 1112 toward the table 16; And it may further include a second transfer device 142 that transfers the second electrode 1122 toward the table 16. Here, the first transfer device 141 may transfer the first electrode 1112 formed by cutting the first electrode sheet 1111 unrolled from the first electrode reel 111 toward the table 16. Additionally, the second transfer device 142 may transfer the second electrode 1122 formed by cutting the second electrode sheet 1121 unrolled from the second electrode reel 112 toward the table 16.

Accordingly, in this embodiment, the first electrode 1112 and the second electrode 1122 can be transferred to both sides of the table 16 through the first transfer device 141 and the second transfer device 142, respectively. It may be easy to alternately stack the first electrode 1112 and the second electrode 1122 on the separator sheet 122.

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 moves between the first transfer device 141 and the second electrode reel 112. Each may be rotated adjacent to the transfer device 142. Accordingly, in this embodiment, the electrodes 11 transferred from the first transfer device 141 and the second transfer device 142 can be quickly stacked on the table 16.

The electrode assembly manufacturing apparatus 1 according to this embodiment may include headers 151a and 152a that adsorb the electrode 11 and seat it on the separator sheet 122. More specifically, the headers 151a and 152a adsorb the first electrode 1112 and seat it on the separator sheet 122. The first header 151a and the second electrode 1122 adsorb and seat the first electrode 1112 on the separator sheet 122. It may further include a second header 152a for seating.

Here, the first header 151a and the second header 152a may rotate and reciprocate in the direction in which they are located on the table 16, respectively. More specifically, the first header 151a and the second header 152a may rotate and reciprocate in a direction facing the upper surface of the table 16.

More specifically, the first header 151a can adsorb the first electrode 1112 transferred from the first transfer device 141 toward the table 16, and the second header 152a is capable of adsorbing the first electrode 1112 transferred from the first transfer device 141 toward the table 16. The second electrode 1122 transferred from 142 toward the table 16 can be adsorbed.

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 151a and the second header 152a are connected to the table. It can rotate and reciprocate toward (16).

Accordingly, in this embodiment, the first header 151a and the second header 152a can move the electrode 11 upward on the table 16 that rotates and reciprocates, and the electrode 11 is attached to the separator sheet 122. (11) can be stably seated.

In addition, the headers 151a and 152a measure whether the first electrode 1112 or the second electrode 1122 is distorted for each first electrode 1112 or the second electrode 1122 and then correct the position as necessary. , it can be accurately seated in a desired position on the separator sheet 122 located on the table 16. Accordingly, in this embodiment, the degree of alignment between the electrodes 11 and the separator sheet 122 stacked and aligned on the table 16 can be further improved.

Referring to FIG. 2, in the electrode assembly manufacturing apparatus 1 according to this embodiment, the electrode 11 may be seated on the separator sheet 122 with adhesive applied to at least a portion of the lower portion of the electrode 11. there is. More specifically, in this embodiment, adhesive is applied to at least a portion of the lower part of the electrode 11 when placed on the transfer devices 141 and 142, or the electrode 11 when adsorbed on the headers 151a and 152a. An adhesive may be applied to at least a portion of the lower portion of the.

Figure 3 is a schematic diagram showing applying an adhesive to the bottom of a first electrode in an electrode assembly manufacturing apparatus according to an embodiment of the present invention. Figure 4 is a schematic diagram showing applying an adhesive to the bottom of a first electrode in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.

Referring to FIGS. 3 and 4 , the electrode assembly manufacturing apparatus 1 according to this embodiment may include a lower nozzle 173 for applying adhesive to at least a portion of the lower portion 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, the first adhesive layer 1710 may be formed on the lower surface of the first electrode 1112. Here, the lower nozzle 173 may be an example of a lower applicator.

As an example, referring to FIG. 3, when the first electrode 1112 is adsorbed to the first header 151a, the lower nozzle 173 may apply adhesive to at least a portion of the lower part of the first electrode.

As another example, the first transfer device 141a includes a first groove 141a' open toward the first electrode 1112, and the lower nozzle 173 moves through the first groove 141a'. 1 Adhesive may be applied to at least a portion of the lower portion of the electrode 1112. Here, the first transfer device 141a may have at least one first groove 141a' formed, and a plurality of first grooves 141a' may be arranged to be spaced apart from each other. Additionally, as shown in Figure 4, the first groove 141a' may extend along the width direction of the first electrode 1112, but is not limited to this and may extend in various directions.

However, for convenience of explanation, the first electrode 1112 is used as an example, and the second electrode 1122 can also be described in the same way as the second header 152a or the second transfer device 142.

Accordingly, the electrode assembly manufacturing apparatus 1 according to this embodiment can apply adhesive to at least a portion of the lower part of the electrode 11 during the transfer process of the electrode 11, thereby improving process convenience and process speed. There is an advantage to being able to

Here, it may be desirable for the adhesive to be uniformly applied to the lower portion of the electrode 11. However, if the adhesive is applied to the entire lower part of the electrode 11, the amount of adhesive applied may be excessively large. In this case, the adhesive may flow to the outside of the separator sheet 122 and contaminate other parts, and the function of generating power when the secondary battery is manufactured may not function smoothly.

Accordingly, in this embodiment, it may be desirable to apply the adhesive to the lower part of the electrode 11 using a spot application method in which the adhesive is applied in the form of a dot or a line application method in which the adhesive is applied in the form of a line. That is, it may be desirable for the first adhesive layer 1710 to be formed in a spot pattern or a line pattern.

On the other hand, if the amount of adhesive applied is excessively small, the electrode 11 is still not fixed to the separator sheet 122 and may deviate from its original position while the cell moves. Therefore, it may be desirable that the spacing between the areas where the adhesive is applied is not excessively wide.

Additionally, the adhesive may be applied to the surface of the electrode 11 in a minimum amount to ensure adhesion between the electrode 11 and the separator sheet 122. In contrast, when the adhesive is applied directly on the separator sheet 122, the separator sheet 122 absorbs some of the adhesive, and in order to secure the adhesive force between the electrode 11 and the separator sheet 122, more There is a problem of having to apply a large amount of adhesive.

Meanwhile, the adhesive may be dissolved in electrolyte solution. More specifically, when the first adhesive layer 1710 formed on the lower part of the electrode 11 is impregnated with an electrolyte solution, the adhesive contained in the first adhesive layer 1710 may be dissolved in the electrolyte solution. Here, dissolving the adhesive may mean that the adhesive melts into the electrolyte solution. That is, the area of the first adhesive layer 1710 formed on the lower part of the electrode 11 is reduced, or the first adhesive layer 1710 disappears altogether, so that no first adhesive layer 1710 remains on the lower part of the electrode 11. It can mean something.

As an example, the adhesive may be an acrylate-based adhesive. Accordingly, in this embodiment, as an acrylate-based adhesive is applied as the adhesive to the lower part of the electrode 11, the adhesive can be dissolved into the electrolyte solution contained in the final battery cell.

Accordingly, in this embodiment, the first adhesive layer 1710 can fix the electrode 11 to the separator sheet 122 during the manufacturing process and prevent the electrode 11 from being left in place. In addition, the first adhesive layer 1710 is dissolved in the electrolyte solution contained in the final battery cell, so it may not interfere with the movement of lithium ions between the electrode and the separator, and battery cell performance may also be further improved.

5 and 6 show that in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, as the table rotates, the separator guide and the first upper nozzle move linearly, and the first upper nozzle rotates to move in the second area. This is a schematic diagram showing how to apply adhesive.

Referring to FIGS. 2, 5, and 6, the pair of upper nozzles 17 applies adhesive to at least a portion of the separator sheet 122 located between the table 16 and the separator guide 125. More specifically, the pair of upper nozzles 17 are a first upper nozzle 171 for applying adhesive to at least a portion of the second region 1222 of the separator sheet 122 and the first region of the separator sheet 122. It includes a second upper nozzle 172 for applying adhesive to at least a portion of 1221.

Here, the first area 1221 of the separator sheet 122 refers to an area of the separator sheet 122 where the first electrode 1112 is attached. In some cases, the first area 1221 refers to an area in the separator sheet 122 to which the first electrode 1112 is attached while covering the second electrode 1122. And, the second area 1222 refers to an area of the separator sheet 122 that covers the first electrode 1112 and is attached to the second electrode 1122. In other words, the first electrode 1112 is seated on the first area 1221 of the separator sheet 122, and the second electrode 1122 is seated on the second area 1222 of the separator sheet 122. You can.

At this time, the first upper nozzle 171 may apply the adhesive to the surface covering the first electrode 1112 in the second area 1222 of the separator sheet 122. That is, the first upper nozzle 171 can apply the adhesive to the second area 1222 of the separator sheet 122, opposite to the surface to which the second electrode 1122 is attached.

Additionally, the second upper nozzle 172 may apply the adhesive to the surface covering the second electrode 1122 in the first area 1221 of the separator sheet 122. That is, the second upper nozzle 172 can apply the adhesive to the surface of the first area 1221 of the separator sheet 122, opposite to the surface to which the first electrode 1112 is attached.

Additionally, the first upper nozzle 171 and the second upper nozzle 172 may be disposed on both sides with the separator sheet 122 interposed therebetween. That is, the first upper nozzle 171 applies adhesive to at least a portion of the second area 1222 before the second area 1222 of the separator sheet 122 covers the upper part of the first electrode 1112. A second adhesive layer 1750 can be formed. In addition, as will be described later in FIG. 8, the second upper nozzle 172 covers the first area 1221 of the separator sheet 122 before the upper part of the second electrode 1122 is covered. The second adhesive layer 1750 may be formed by applying an adhesive to at least a portion of the .

Additionally, the pair of upper nozzles 17 can reciprocate linearly left and right with respect to the table 16. That is, the pair of upper nozzles 17 move linearly in the direction from one side of the table 16 toward the other side or in the opposite direction, and form the first region 1221 or the second region 1222 of the separator sheet 122. Adhesive may be applied to at least part of the.

As an example, referring to FIGS. 2, 5, and 6, at the same time that the first electrode 1112 is seated on the first region 1221 of the separator sheet 122, the first upper nozzle 171 is It can move in a straight line on the second area 1222 of the separator sheet 122. Here, the first upper nozzle 171 may apply the adhesive to at least a portion of the second area 1222 while moving straight in a direction away from the table 16. In addition, as will be described later in FIG. 8, at the same time as the second electrode 1122 is seated on the second region 1222 of the separator sheet 122, the second upper nozzle 172 is attached to the separator sheet 122. It can move in a straight line on the first area 1221. Here, the second upper nozzle 172 may apply the adhesive to at least a portion of the first area 1221 while moving straight in a direction away from the table 16.

Additionally, the description of the adhesive applied from the pair of upper nozzles 17 may be the same as that of the adhesive applied from the lower nozzle 173 described above.

Additionally, the pair of upper nozzles 17 may reciprocate left and right simultaneously or separately relative to the table 16. More preferably, the pair of upper nozzles 17 can reciprocate left and right simultaneously with respect to the table 16. As an example, as shown in FIGS. 5 and 6, when applying adhesive from one side of the first area 1221 where the first upper nozzle 171 is located on the right side of the table 16 to the other side, as described later in FIG. 8 As shown, the second upper nozzle 172 can apply adhesive from one side of the second area 1222 located on the left side of the table 16 toward the other side.

Accordingly, in this embodiment, the process time of the adhesive application process for the pair of upper nozzles 17 can be reduced. Additionally, the adhesive application process of the pair of upper nozzles 17 can be performed simultaneously with the process of seating the electrode 11 on the separator sheet 122, so process efficiency can be further improved.

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

According to another embodiment of the present invention, as shown in Figures 5 and 6, when the pair of upper nozzles 17 each apply adhesive on the separator sheet 122, the end of the first upper nozzle 171 Alternatively, the end of the second upper nozzle 172 may rotate in a direction adjacent to the separator sheet 122. The pair of upper nozzles 17 may rotate in a direction in which the end of the first upper nozzle 171 or the end of the second upper nozzle 172 faces the upper surface of the separator sheet 122. In other words, the angle between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 of the pair of upper nozzles 17 may be adjusted.

As an example, the pair of upper nozzles 17 may be rotated and adjusted so that the angle between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 is constant. You can. However, the rotation angle of the pair of upper nozzles 17 is not limited to this, and any angle at which the adhesive application interval is uniform may be included in the present embodiment.

In addition, although not shown in FIGS. 2, 5, and 6, the pair of upper nozzles 17 have an end of the first upper nozzle 171 or an end of the second upper nozzle 172 connected to the separator sheet 122. The location can move in the direction of being adjacent.

As an example, the position of the pair of upper nozzles 17 is moved so that the height difference between the end of the first upper nozzle 171 or the end of the second upper nozzle 172 and the upper surface of the separator sheet 122 is constant. It can be adjusted. However, the position of the pair of upper nozzles 17 is not limited to this, and any position where the adhesive application interval is uniform may be included in the present embodiment.

Accordingly, this embodiment adjusts the angle or position of the pair of upper nozzles 17 to make the application interval and/or application amount of the adhesive applied from the pair of upper nozzles 17 more uniform. , quality can also be further improved.

Figure 7 is a schematic diagram showing the second area coated with adhesive covering the first electrode while the separator guide moves linearly in the opposite direction in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 5 to 7 , in this embodiment, the folding direction of the separator sheet 122 may be guided by the separator guide 125. More specifically, the separator guide 125 may reciprocate linearly left and right with respect to the table 16.

As an example, the separator guide 125 may have a pair of rolls 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 to this, and any form that can control the folding direction of the separator sheet 122 can be included in the present embodiment.

Additionally, the separator guide 125 may be positioned at the upper and lower parts of the pair of upper nozzles 17, respectively. However, the position and number of separator guides 125 are not limited to this, and any position and number that can control the folding direction of the separator sheet 122 can be included in the present embodiment.

Here, the separator guide 125 reciprocates left and right simultaneously with the pair of upper nozzles 17 relative to the table 16, or the separator guide 125 and the pair of upper nozzles 17 move left and right respectively. Can reciprocate.

More preferably, the first upper nozzle 171 applies the adhesive to at least a portion of the second area 1222 of the separator sheet 122, and the separator guide 125 applies the adhesive to the second electrode reel 112. Or, it moves straight in the direction toward the second transfer device 142. In addition, as will be described later in FIG. 8, the second upper nozzle 172 applies the adhesive to at least a portion of the first area 1221 of the separator sheet 122, and the separator guide 125 applies the adhesive to the first area 1221 of the separator sheet 122. It can move straight in the direction toward the electrode reel 111 or the first transfer device 141.

Accordingly, the separator guide 125 forms an area on 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 is a pair. It can assist in the adhesive application process of the upper nozzle 17.

In addition, when the separator guide 125 makes a linear reciprocating motion toward the first transfer device 141 and the second transfer device 142 with respect to the table 16, the separator sheet 122 moves along the separator guide 125. By folding along the moving direction, the separator sheet 122 can cover the electrode 11.

As an example, referring to FIG. 7, in a state where the first electrode 1112 is seated on the first area 1221 of the separator sheet 122, the separator guide 125 moves toward the first transfer device 141. By moving in a straight line, the second area 1222 of the separator sheet 122 may cover the top of the first electrode 1112.

More specifically, when the application of the adhesive to the first upper nozzle 171 is completed as shown in FIG. 6, the separator guide 125 is positioned at the second area 1222 of the separator sheet 122 to which the adhesive is applied, as shown in FIG. 7. It moves straight in the direction covering the first electrode 1112. Likewise, when the application of the adhesive to the second upper nozzle 172 is completed, the separator guide 122 is such that the first area 1221 of the separator sheet 122 to which the adhesive is applied covers the second electrode 1122. Move in a straight line in that direction.

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 the pair of upper nozzles 17, thereby reducing the process time. Process efficiency can be further improved.

Figure 8 is a schematic diagram showing a second electrode being seated on a second region of a separator sheet in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

2 and 8, in the electrode assembly manufacturing apparatus 1 according to this embodiment, similar to the first electrode 1112, the table 16 is connected to the second electrode reel 112 or the second transfer device. A rotational reciprocating motion can be performed toward (142). At this time, the second electrode 1122 is adsorbed to the second header 152a and can rotate and reciprocate. For example, as shown in FIG. 8, while the second electrode 1122 is adsorbed to the second header 152a, the second header 152a may be rotated to be positioned on the upper part of the table 16. At this time, the second electrode 1122 may be seated on the second area 1222 of the separator sheet 122. In addition, the description of the second electrode 1122 and the second header 152a may be the same as that of the first upper nozzle 171 described above.

Additionally, similar to the first upper nozzle 171, the second upper nozzle 172 can perform a linear reciprocating motion based on the table 16. As an example, the second upper nozzle 172 may apply adhesive to at least a portion of the first area 1221 as it moves from one side of the first area 1221 located on the right side of the table 16 toward the other side. You can. In addition, the description of the second upper nozzle 172 may be the same as that of the first upper nozzle 171 described above.

Using the electrode assembly manufacturing apparatus 1 as described above, the unit cell manufacturing method according to an embodiment of the present invention can be performed as follows.

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 forms a plurality of The first electrode 1112 is formed (S101).

Meanwhile, when the separator sheet 122 is unwound from the separator reel 121, it is seated on the upper surface of the table 16 (S102). At this time, the table 16 may rotate toward the first electrode reel 111 or the first transfer device 141 while the separator sheet 122 is seated.

Additionally, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112 (S103). For example, as shown in FIG. 3, when the first header 151a adsorbs the first electrode 1112, the lower nozzle applies adhesive to the lower part of the first electrode 1112. As another example, as shown in FIG. 4, while the first transfer device 141 transfers the first electrode 1112, the lower nozzle 173 applies adhesive to the lower part of the first electrode 1112.

Additionally, referring to FIGS. 1 and 2 , the first header 151a may rotate on the table 16 while adsorbing the first electrode 1112 . And, when the first header 151a is located above the table 16, as shown in FIG. 2, the first header 151a is provided with a first adhesive layer in the first area 1221 of the separator sheet 122. The first electrode 1112 on which 1710 is formed is seated (S104).

In addition, referring to FIGS. 1, 5, and 6, when the first electrode 1112 is seated in the first area 1221 of the separator sheet 122, the first upper nozzle 171 is connected to the separator sheet 122. ) can be applied to the second area 1222 (S105). Here, as the first upper nozzle 171 moves toward the second transfer device 142, the second adhesive layer 1750 may be formed in the second area 1222 of the separator sheet 122. At this time, the separator guide 125 and the first upper nozzle 171 can move together in a straight line.

Additionally, referring to FIGS. 1 and 7 , with at least a portion of the second adhesive layer 1750 formed in the second area 1222 of the separator sheet 122, the separator guide 125 is connected to the first upper nozzle 171. ) moves in the direction opposite to the direction of movement of the first transfer device 141, one side of the separator sheet 122 is folded, and the second region 1222 of the separator sheet 122 is formed with the first electrode ( 1112) (S106).

Meanwhile, as shown in FIG. 2, 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 152a adsorbs the second electrode 1122. Here, like the first electrode 1112, a first adhesive layer 1710 formed by applying adhesive from the lower nozzle 173 may be located on the lower part of the second electrode 1122.

And, as shown in FIG. 8, the table 16 rotates toward the second electrode reel 112 or the second transfer device 142 in a state in which the second region 1222 of the separator sheet 122 is seated. You can. At this time, if the second area 1222 of the separator sheet 122 covers the first electrode 1112, the second header 152a adsorbing the second electrode 1122 covers the second area 1222. moves toward the upper part, and places the second electrode 1122 on the upper part of the second area 1222.

And, as shown in FIG. 8, the second upper nozzle 172 applies the adhesive to the first area 1221 of the separator sheet 122. Here, as the second upper nozzle 172 moves toward the first transfer device 141, the second adhesive layer 1750 may be formed in the first area 1221 of the separator sheet 122. At this time, the separator guide 125 and the second upper nozzle 172 can move together in a straight line.

Thereafter, with at least a portion of the second adhesive layer 1750 formed in the first area 1221 of the separator sheet 122, the separator guide 125 is moved in the opposite direction to the moving direction of the second upper nozzle 172. 2 Moving in the direction toward the transfer device 142, the other side of the separator sheet 122 is folded, so that the first area 1221 of the separator sheet 122 covers the second electrode 1122.

That is, by repeating the above processes, the electrode assembly manufacturing method according to an embodiment of the present invention can be performed.

When performing the electrode assembly manufacturing method according to the embodiments of the present invention, when stacking the electrode 11 and the separator sheet 122 in a Z-folding manner, adhesive is applied to the upper and lower parts of the electrode 11, respectively. This prevents the electrode 11 from leaving its original position.

Figure 9 is an exploded perspective view of a battery cell according to an embodiment of the present invention.

Referring to FIGS. 8 and 9, in the electrode assembly 10 in which electrodes and separator sheets are alternately stacked according to another embodiment of the present invention, the electrode 11 includes a first electrode 1112 and a second electrode. 1122, and the separator sheet 122 has a zigzag shape formed by being folded at least twice.

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 is the first region 1222 of the separator sheet 122. It covers the electrode 11. In addition, the second electrode 1122 is seated on the second area 1222 of the separator sheet 122 and is folded so that the first area 1221 of the separator sheet 122 covers the second electrode 1122. I'm doing it.

In particular, in the electrode assembly 10 according to this embodiment, the electrodes 11 may be stacked one by one on the first area 1221 or the second area 1222 of the separator sheet 122. At this time, after measuring whether the electrode 11 is distorted, the electrode 11 can be stacked at an exact position on the separator sheet 122 with the position corrected as necessary. Accordingly, the electrode assembly 10 according to this embodiment may have improved alignment between the electrode 11 and the separator sheet 122.

Here, an adhesive layer 1700 is formed between the electrode 11 and the separator sheet 122. More specifically, the adhesive layer 1700 includes a first adhesive layer 1710 and a second adhesive layer 1750. The first adhesive layer 1710 may be located between the bottom of the electrode 11 and the separator sheet 122, and the second adhesive layer 1750 may be located between the top of the electrode 11 and the separator sheet 122.

For example, the first adhesive layer 1710 and the second adhesive layer 1750 may each be formed by applying adhesive in the form of a plurality of dots. However, as previously described in the battery cell manufacturing apparatus 1, the shapes of the first adhesive layer 1710 and the second adhesive layer 1750 are not limited thereto, and may be formed in various shapes.

Accordingly, the electrode assembly 10 according to this embodiment has an adhesive layer 1700 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 force, the electrode 11 and the separator sheet 122 are formed. Since the separators can be stably fixed to each other, the electrode 11 can be prevented from being displaced from its proper position. In addition, the electrode assembly 10 of this embodiment covers the upper and lower parts of the electrode 11 in a folded form with one separator sheet 122, thereby further improving the alignment of the electrode 11 and the efficiency of the process. It can be.

In addition, since there is no need to perform a laminating process as in the past, the defect rate in the process caused by high heat and pressure can be reduced. And, since the laminator can be removed, the volume of the manufacturing device can be reduced and the manufacturing process can be simplified.

The separator according to the embodiment described in this specification may be a ceramic coated separator (CCS). Generally, a separator includes a fabric film and a coating layer formed on at least one side of the fabric film, and the coating layer may include alumina powder and a binder that binds them together. Safety Reinforced Separator (SRS) has a large amount of binder coated on the surface of the coating layer, but CCS may not have a binder coated on the surface of the coating layer, or the binder content distributed on the surface may be very low compared to SRS. For example, in the case of the CCS separator according to this embodiment, the binder content coated on the surface of the coating layer of the separator may be approximately 3 wt% or less. For example, the binder content coated on the surface of the coating layer of the separator may be approximately 2 wt% or less or approximately 1 wt% or less.

When the separator is CCS, the internal electrode included in the electrode assembly is transported in an unfixed state, so there is a possibility that alignment may be disturbed during transport. Of course, if the separator is CCS, it can be fixed with heat and pressure, but the alignment of the internal electrodes may be disturbed even in the process of forming a laminate of electrodes and a separator and then transferring it to a heat and pressure fixing device. Additionally, there is a disadvantage of having to use an expensive separator with a high binder content in order to attach the electrode and separator using heat and pressure. On the other hand, according to this embodiment, the fixation force can be increased while preventing the alignment of the internal electrodes from being disturbed during transport.

Figure 10 is an exploded perspective view of a battery cell according to an embodiment of the present invention.

Referring to FIGS. 2, 9, and 10, a battery cell according to another embodiment of the present invention is a battery cell including the electrode assembly 10 described above, which accommodates the electrode assembly 10 together with an electrolyte solution. It includes a battery case 50, and the adhesive layer 1700 is dissolved in the electrolyte solution.

Here, a fixing member such as a fixing tape 30 may be attached to the outside 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 the fixing tape 30 is attached may be referred to as the final electrode assembly 20.

The battery case 50 includes an accommodating portion 60 on which the electrode assembly 10 or the final electrode assembly 20 is mounted, and a sealing portion 70 that seals the outer periphery of the accommodating portion 60. As an example, the battery case 50 may be a laminate sheet including a resin layer and a metal layer. More specifically, the battery case 50 is made of a laminated sheet and may be composed of an outer resin layer forming the outermost layer, a barrier metal layer to prevent penetration of substances, and an inner resin layer for sealing.

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

More specifically, in the battery cell according to this embodiment, when the adhesive layer 1700 formed between the electrode 11 of the electrode assembly 10 and the separator sheet 122 is dissolved into the electrolyte solution, the surface of the electrode 11 There may be very little adhesive 14 remaining, or it may be completely gone.

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 or all of the adhesive layer may be dissolved in the electrolyte solution, and traces of application of the adhesive layer 1700 may remain on the separator sheet 122 during this process. there is.

Here, traces of application of the adhesive layer 1700 may mean that although no adhesive component included 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 to this, and the application traces of the adhesive layer 1700 may refer to traces that can confirm whether or not the adhesive has been applied in various ways, such as traces that can confirm whether or not the adhesive has been applied with the naked eye. Accordingly, traces of application of the adhesive layer 1700 formed on the separator sheet 122 may be formed at the same location where the adhesive is applied.

Accordingly, in the battery cell according to this embodiment, the adhesive layer 1700 is completely dissolved on the surface of the electrode 11 or the separator 122, and unreacted areas due to the adhesive layer 1700 disappear, preventing performance degradation and providing excellent battery performance. This can be implemented.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims can also be made. It falls within the scope of invention rights.

1: Cell manufacturing device
11: electrode
16: table
17: nozzle
111: first electrode reel
112: second electrode reel
121: Separator reel
122: Separator sheet
125: Separator guide
131: first cutter
132: second cutter
141: first transport device
142: second transfer device
151a: first header
152a: second header
171: first upper nozzle
172: second upper nozzle
1111: first electrode sheet
1112: first electrode
1121: second electrode sheet
1122: second electrode
1221: First area
1222: Second area
1710: first adhesive layer 1750: second adhesive layer

Claims (20)

a first electrode supply unit provided with a first electrode sheet on which a plurality of first electrodes are formed;
a second electrode supply unit provided with a second electrode sheet on which a plurality of second electrodes are formed;
A separator supply unit that folds when the first electrode or the second electrode is seated and is provided with a separator sheet that covers the first electrode or the second electrode and is stacked with the first electrode or the second electrode;
A table for seating the first electrode and the second electrode on a top surface to form an electrode assembly, with the separator sheet folded between the first electrode and the second electrode;
A separator guide that guides the folding direction of the separator sheet; and
A pair of upper applicators for applying adhesive to at least a portion of the separator sheet located between the table and the separator guide,
The table rotates and reciprocates between the first electrode supply unit and the second electrode supply unit,
An electrode assembly manufacturing device in which the separator guide and the pair of upper applicators reciprocate linearly left and right with respect to the table. In paragraph 1:
The first electrode is seated on the first area of the separator sheet,
The second electrode is an electrode assembly manufacturing device wherein the second electrode is seated on the second area of the separator sheet. In paragraph 2,
The pair of upper applicators includes a first upper nozzle and a second upper nozzle,
The first upper nozzle applies the adhesive to at least a portion of the second area of the separator sheet,
The second upper nozzle applies the adhesive to at least a portion of the first area of the separator sheet. In paragraph 3,
When the pair of upper applicators respectively apply adhesive on the separator sheet, an end of the first upper nozzle or an end of the second upper nozzle rotates in a direction adjacent to the separator sheet. An electrode assembly manufacturing device . In paragraph 3,
The first upper nozzle and the second upper nozzle are disposed on both sides with the separator guide between them. In paragraph 3,
At the same time as the first electrode is seated on the first area of the separator sheet, the first upper nozzle moves linearly on the second area of the separator sheet,
At the same time as the second electrode is seated on the second area of the separator sheet, the second upper nozzle moves linearly on the first area of the separator sheet. In paragraph 6:
At the same time that the first upper nozzle applies the adhesive to at least a portion of the second region of the separator sheet, the separator guide moves linearly in a direction toward the second electrode supply unit,
An electrode assembly manufacturing apparatus in which the second upper nozzle applies the adhesive to at least a portion of the first region of the separator sheet, and at the same time, the separator guide moves linearly in a direction toward the first electrode supply unit. In paragraph 7:
When adhesive application to the first upper nozzle is completed, the separator guide moves straight in the direction where the second area of the separator sheet to which the adhesive is applied covers the first electrode,
When application of the adhesive to the second upper nozzle is completed, the separator guide moves linearly in a direction in which the first area of the separator sheet to which the adhesive is applied covers the second electrode. In paragraph 1:
An electrode assembly manufacturing apparatus including a lower applicator for applying the adhesive to a lower portion of the first electrode and a lower portion of the second electrode, respectively. In paragraph 9:
a first header that adsorbs the first electrode and seats it in a first area of the separator sheet; and
It further includes a second header that adsorbs the second electrode and seats it in the second area of the separator sheet,
The first header and the second header rotate and reciprocate in the direction in which they are positioned on the table. In paragraph 10:
When the first electrode is adsorbed to the first header, the lower applicator applies the adhesive to the lower part of the first electrode,
When the second electrode is adsorbed to the second header, the lower applicator applies the adhesive to the lower part of the second electrode. In paragraph 9:
a first transfer device that transfers the first electrode toward the table; and
An electrode assembly manufacturing apparatus further comprising a second transfer device that transfers the second electrode toward the table. In paragraph 12:
The first transfer device includes a first groove open toward the first electrode, wherein the lower applicator applies the adhesive to the lower part of the first electrode through the first groove,
The second transfer device includes a second groove open toward the second electrode, and the lower applicator applies the adhesive to the lower part of the second electrode through the second groove. forming a plurality of first electrodes by cutting the first electrode sheet provided from the first electrode supply unit;
A step of seating the separator sheet provided from the separator supply unit on the table along the separator guide;
applying adhesive to the lower part of the first electrode by a lower applicator;
Seating the first electrode on the first area of the separator sheet;
applying adhesive to at least a portion of the second area of the separator sheet using a first upper nozzle; and
A method of manufacturing an electrode assembly comprising the step of folding the separator sheet in a folding direction guided by a separator guide, so that the second area of the separator sheet to which the adhesive is applied covers the first electrode. In paragraph 14:
After covering the top of the first electrode,
forming a plurality of second electrodes by cutting the second electrode sheet provided from the second electrode supply unit;
applying adhesive to the lower part of the second electrode by a lower applicator;
Seating the second electrode on the second area of the separator sheet;
applying adhesive to at least a portion of the first area of the separator sheet using a second upper nozzle; and
The method of manufacturing an electrode assembly further comprising folding the separator sheet in a folding direction guided by the separator guide, so that the first area of the separator sheet to which the adhesive is applied covers the second electrode. In paragraph 15:
The table rotates and reciprocates between the first electrode supply unit and the second electrode supply unit,
A method of manufacturing an electrode assembly in which the separator guide and a pair of upper applicators including the first upper nozzle and the second upper nozzle linearly reciprocate left and right with respect to the table. In paragraph 16:
In the step of applying the adhesive by the first upper nozzle and the step of applying the adhesive by the second upper nozzle,
An electrode assembly manufacturing method in which the end of the first upper nozzle or the end of the second upper nozzle rotates in a direction adjacent to the separator sheet. An electrode assembly in which electrodes and separator sheets are alternately stacked by the electrode assembly manufacturing method of claim 14,
The electrode includes a first electrode and a second electrode,
The separator sheet has a zigzag shape formed by folding at least twice,
The separator sheet is folded with the first electrode seated on the first region of the separator sheet, so that the second region of the separator sheet covers the first electrode, and the second region is on the second region. The electrode is folded in a seated state so that the first area of the separator sheet covers the second electrode,
An adhesive layer is formed between the electrode and the separator sheet,
The adhesive layer is dissolved in an electrolyte solution for use in a battery cell,
An electrode assembly in which part or all of an adhesive layer formed between the first electrode and the separator sheet and/or between the second electrode and the separator sheet is disposed as a plurality of dots or lines. In paragraph 18:
The adhesive layer includes a first adhesive layer and a second adhesive layer,
The first adhesive layer is located between the bottom of the electrode and the separator sheet,
The second adhesive layer is an electrode assembly located between the top of the electrode and the separator sheet. A battery cell comprising the electrode assembly of claim 18,
Comprising a battery case that accommodates the electrode assembly together with an electrolyte,
A battery cell in which the adhesive layer is dissolved in the electrolyte solution.