KR20240056285A - Electrode assembly manufacturing equipment and manufacturing method for electrode assembly - Google Patents

Abstract

This application relates to an electrode assembly manufacturing apparatus and an electrode assembly manufacturing method.

Description

Electrode assembly manufacturing apparatus and electrode assembly manufacturing method {ELECTRODE ASSEMBLY MANUFACTURING EQUIPMENT AND MANUFACTURING METHOD FOR ELECTRODE ASSEMBLY}

The present invention relates to an electrode assembly manufacturing apparatus and an electrode assembly manufacturing method.

Unlike primary batteries, secondary batteries can be recharged and have been extensively researched and developed in recent years due to their small size and high capacity. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-shaped batteries, cylindrical batteries, square-shaped batteries, and pouch-shaped batteries, depending on the shape of the battery case. In a secondary battery, the electrode assembly mounted inside the battery case is a power generating element capable of charging and discharging consisting of a stacked structure of electrodes and a separator.

The electrode assembly is a jelly-roll type that is wound with a separator between the sheet-like positive and negative electrodes coated with active material, and a stack type in which multiple positive and negative electrodes are sequentially stacked with a separator interposed. , and stack-type unit cells can be roughly classified into stack-and-fold type in which the unit cells are wound with a long length of separation film.

Here, using a separator containing an organic/inorganic composite porous coating layer, the separator is folded in a zigzag manner and the laminate having electrodes positioned in between is fixed with a gripper and heated and pressed to create a stack-and-fold type. The electrode assembly is manufactured.

At this time, in order to prevent the stacking of the electrode and the separator from being distorted during the process of stacking the electrode, a process of fixing it with a mandrel is necessary. During this process, the friction force generated between the mandrel, the electrode, and the separator And there has been a problem of damage to the separator.

Therefore, there is a need for a method to improve the performance of the manufactured electrode assembly by preventing damage to the electrode and separator during the stacking process using a mandrel.

Korean Patent Publication No. 10-2013-0132230

The present invention is to provide an electrode assembly manufacturing apparatus and an electrode assembly manufacturing method.

One embodiment of the present invention includes supplying a first electrode to a stack table; supplying a second electrode to a stack table; Supplying a separator to a stack table; manufacturing a laminate by stacking the first electrode, the separator, and the second electrode along a stacking axis on a stack table in a form where the first electrode and the second electrode are alternately arranged between the folded separators; And after manufacturing the laminate, it relates to a method of manufacturing an electrode assembly including a heat press step of heating and pressurizing the laminate,

The step of manufacturing the laminate is

(S1) stacking a separator on the stack table and stacking the first electrode or the second electrode on the stacked separator; (S2) fixing the stacked first or second electrodes with a mandrel having an air outlet; (S3) stacking the separator to surround the first or second electrode fixed with the mandrel while moving the stack table to the left or right or the separator to the left or right; and (S4) after the separator is laminated, releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode; (S5) After releasing the fixation of the mandrel, laminating the first electrode or the second electrode on the separator, and performing the steps (S1) to (S5) one or more times. and

fixing the stacked first or second electrodes with a mandrel having an air outlet; and the step of releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode includes spraying air from the air outlet of the mandrel, respectively. A manufacturing method is provided.

One embodiment of the present invention is an electrode assembly device for manufacturing an electrode assembly by stacking a first electrode, a separator, and a second electrode, wherein the first electrode and the second electrode are alternately disposed between the folded separators. A stack table for manufacturing a laminate that is stacked along a stacking axis in the form of a stack; a separator supply unit that supplies the separator to the stack table; a first electrode supply unit supplying the first electrode to the stack table; a second electrode supply unit supplying the second electrode to the stack table; a first electrode stack unit that stacks the first electrode supplied from the first electrode supply unit on the stack table; a second electrode stack unit that stacks the second electrode supplied from the second electrode supply unit on the stack table; a mandrel having an air outlet for fixing the stacked first or second electrodes; and a press unit that heats and presses the laminate to adhere the first electrode, the separator, and the second electrode.

The electrode assembly manufacturing apparatus and electrode assembly manufacturing method according to the embodiment of the present application can prevent cell damage during the manufacturing process of the electrode assembly manufactured by laminating electrodes and separators.

The electrode assembly manufacturing apparatus and electrode assembly manufacturing method according to the embodiment of the present application can not only prevent cell damage during the manufacturing process of the electrode assembly, but also prevent distortion of the electrodes constituting the electrode assembly during the manufacturing process. , it is possible to provide an electrode assembly with improved energy density.

1 is a plan view illustrating an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a front view showing the concept of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 3 is a cross-sectional view exemplarily showing an electrode assembly manufactured through an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 4 schematically shows a mandrel according to a specific embodiment of the present invention.
Figure 5 is a perspective view illustrating a press unit of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 6(a) is a perspective view showing the first press unit 50 according to an exemplary embodiment of the present invention, and Figure 6(b) shows the second press unit 60 according to an exemplary embodiment of the present invention. This is a perspective view.
Figure 7 is a perspective view showing a stack table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 8 is a perspective view showing a first electrode seating table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 9 is a perspective view showing a second electrode seating table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 10 is a perspective view showing a first suction head in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 11 is a bottom view showing a first suction head in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 12 is a plan view showing a mandrel and a stack table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail so that those skilled in the art can easily practice it. However, the present invention may be implemented in many different forms and is not limited to the configuration described herein.

In this specification, when a part 'includes' a certain component, this means that it does not exclude other components but may further include other components, unless specifically stated to the contrary.

In this specification, 'p to q' means 'p or more and q or less.'

As used herein, “stacking axis” refers to an axis extending in a direction parallel to the stacking direction of a laminate in which a first electrode, a separator, and a second electrode are stacked.

In this specification, a "mandrel" is a stack of the first electrode, the separator, and the second electrode in a form in which the first electrode and the second electrode are alternately arranged between the separators folded on the stack table. A gripper that performs the function of holding the laminate on the stack table in order to stack the first electrode or the second electrode in the process of manufacturing the laminate, and grips the laminate in the process of heating and pressing; has a different function.

In this specification, “gripper” means that it performs the function of fixing the laminate in the process of heating and pressurizing the laminate, and has a different function from the mandrel as described above.

In describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

One embodiment of the present invention includes supplying a first electrode to a stack table; supplying a second electrode to a stack table; Supplying a separator to a stack table; manufacturing a laminate by stacking the first electrode, the separator, and the second electrode along a stacking axis on a stack table in a form where the first electrode and the second electrode are alternately arranged between the folded separators; And after manufacturing the laminate, it relates to a method of manufacturing an electrode assembly including a heat press step of heating and pressurizing the laminate,

The step of manufacturing the laminate is

(S1) stacking a separator on the stack table and stacking the first electrode or the second electrode on the stacked separator; (S2) fixing the stacked first or second electrodes with a mandrel having an air outlet; (S3) stacking the separator to surround the first or second electrode fixed with the mandrel while moving the stack table to the left or right or the separator to the left or right; and (S4) after the separator is laminated, releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode; (S5) After releasing the fixation of the mandrel, laminating the first electrode or the second electrode on the separator, and performing the steps (S1) to (S5) one or more times. and

fixing the stacked first or second electrodes with a mandrel having an air outlet; and the step of releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode includes spraying air from the air outlet of the mandrel, respectively. A manufacturing method is provided.

The electrode assembly manufacturing method according to the embodiment of the present application uses a mandrel having an air ejection port in the process of manufacturing a laminate by stacking the first electrode, separator, and second electrode along the stacking axis on a stack table. Since the process of repeating the fixing and unfixing of the electrode includes the step of spraying air from the air outlet of the mandrel, the friction force generated from the mandrel, electrode, and separator is minimized to ensure that the mandrel is connected to the electrode. Damage to the separator can be minimized. That is, cell damage can be prevented during the manufacturing process of the electrode assembly, and distortion of the electrodes constituting the electrode assembly can be prevented during the manufacturing process, thereby providing an electrode assembly with improved energy density.

In an exemplary embodiment of the present application, the step of spraying air from the air ejection port of the mandrel may be spraying air for 1 to 10 seconds under a pressure condition of 0.5 MPa to 1.5 MPa. More specifically, air may be sprayed for 1 to 10 seconds at a pressure of 0.5 MPa to 1.5 MPa, preferably for 3 to 8 seconds at a pressure of 1.0 MPa to 1.3 MPa.

When the above conditions are satisfied, the stacking state of the electrodes and separators due to the pressure of the sprayed air is disturbed or damage to the electrodes and separators is effectively prevented, and the electrodes, separators, and mands stacked in the process of moving the mandrel are maintained. Damage to electrodes and separators can be minimized by reducing friction that occurs between reels.

In an exemplary embodiment of the present application, after manufacturing the laminate, the heat press step of heating and pressurizing the laminate includes a first step of holding the laminate with a gripper and heating and pressing the laminate. Primary heat press step; And after the first heat press step, it may include a second heat press step of stopping the gripping of the gripper and heating and pressing the laminate.

In an exemplary embodiment of the present application, the first heat press step of holding the laminate with a gripper and heating and pressing the laminate includes fixing the laminate by pressing the upper surface of the laminate using a gripper; moving the laminate and the stack table fixed by the gripper between a pair of pressing blocks spaced apart by a distance longer than the sum of the thicknesses of the laminate and the stack table; pressurizing the fixed laminate by moving the pair of pressure blocks to be closer to each other along the stacking direction of the laminate; and heating the laminate by a heater included in the stack table or the pair of pressurizing blocks while pressing the laminate.

In an exemplary embodiment of the present application, after the first heat press step, the second heat press step of stopping the grip of the gripper and heating and pressing the laminate is performed after the first heat press step. stopping heating and pressurizing the laminate; separating the gripper from the stack; And a step of pressing the fixed stack by moving the pair of press blocks so that the gripper approaches each other along the stacking direction of the spaced apart stack, and while pressing the stack, the stack table or the pair It may include the step of heating the laminate by a heater included in the pressurizing block.

In an exemplary embodiment of the present application, the step of stopping heating and pressurizing the laminate after the first heat press step includes stopping heating of the laminate; And it may include stopping the pressurization of the fixed stack by moving the pair of pressure blocks away from each other along the stacking direction of the stack.

In an exemplary embodiment of the present application, the step of separating the gripper from the laminate includes stopping pressing the upper surface of the laminate using the gripper; And it may include separating the gripper from the stack.

In an exemplary embodiment of the present application, the stack table or the pair of pressurizing blocks may include a heater.

In an exemplary embodiment of the present application, the stack table pressurizing block may include a heater.

In an exemplary embodiment of the present application, the pair of pressurizing blocks may include a heater.

In an exemplary embodiment of the present application, both the stack table and the pair of pressurizing blocks may include heaters.

In an exemplary embodiment of the present application, the first heat press step may be to heat and press the laminate for 10 seconds to 30 seconds under a temperature condition of 65°C to 90°C and a pressure condition of 1Mpa to 3Mpa. . More preferably, the laminate may be heated and pressed for 10 to 20 seconds at a temperature of 65°C to 75°C and a pressure of 1.5Mpa to 2Mpa.

In an exemplary embodiment of the present application, the second heat press step is performed at a temperature of 50°C to 90°C and a pressure of 1Mpa to 6Mpa for 5 to 60 seconds, preferably at 65°C or higher and 90°C or lower. The laminate may be heated and pressed for 5 to 30 seconds under temperature conditions and pressure conditions of 1.5Mpa to 6Mpa. More preferably, the laminate may be heated and pressed for 7 to 25 seconds at a temperature of 65°C to 85°C and a pressure of 3Mpa to 5.5Mpa.

When heating and pressing while satisfying the above conditions, adhesion of the electrode and separator of the laminate of the first electrode, separator, and second electrode is easy without damaging the first electrode, separator, and second electrode, and can be manufactured. The performance of the electrode assembly can be excellent.

One embodiment of the present application is an electrode assembly device for manufacturing an electrode assembly by stacking a first electrode, a separator, and a second electrode, wherein the first electrode and the separator are positioned between the folded separators. A stack table for manufacturing a laminate in which second electrodes are alternately arranged along the stacking axis; a separator supply unit that supplies the separator to the stack table; a first electrode supply unit supplying the first electrode to the stack table; a second electrode supply unit supplying the second electrode to the stack table; a first electrode stack unit that stacks the first electrode supplied from the first electrode supply unit on the stack table; a second electrode stack unit that stacks the second electrode supplied from the second electrode supply unit on the stack table; a mandrel having an air outlet for fixing the stacked first or second electrodes; and a press unit that heats and presses the laminate to adhere the first electrode, the separator, and the second electrode.

Figure 5 is a perspective view illustrating a press unit of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 1, 2, and 5, the press unit 180 includes a pair of pressing blocks 181 and 182, and the pair of pressing blocks 181 and 182 are moved in a direction facing each other, and the pressing blocks 181 and 182 are moved in a direction facing each other. A stack of the first electrode 11, the separator 14, and the second electrode 12 may be disposed between (181 and 182). Thereafter, the press unit 180 heats and presses the laminate while pressing the stacked first electrode 11, separator 14, and second electrode 12 to form the first electrode 11 and the separator. (14), and the second electrode 12 can be bonded.

In addition, the press unit 180 further includes press heaters 183 and 184 that heat a pair of pressing blocks 181 and 182, so that the pair of pressing blocks 181 and 182 can heat and pressurize the laminate. Accordingly, heat fusion between the first electrode 11, the separator 14, and the second electrode 12 in the laminate may be better achieved, thereby enabling more robust adhesion.

The horizontal and vertical lengths of the pressing surfaces of the pair of pressing blocks 181 and 182 may be formed to be longer than the horizontal and vertical lengths of the stack. In addition, the pair of pressure blocks 181 and 182 includes a first pressure block 181 and a second pressure block 182, and the first pressure block 181 and the second pressure block 182 are rectangular in the shape of a rectangular parallelepiped. It can be provided as a block.

In an exemplary embodiment of the present application, the electrode assembly manufacturing apparatus includes a stack table moving unit that moves the stack table left and right; Alternatively, it may include a separator guide portion that moves the separator left and right. The form of the stack table moving unit and the separator guide unit is not limited as long as they respectively perform the function of moving the stack table and the separator left and right, and devices commonly used in the relevant field may be used.

In an exemplary embodiment of the present application, the press unit further includes a pair of pressurizing blocks and a press heater for heating the pressurizing blocks, and the pair of pressurizing blocks are moved in directions facing each other and face the laminate. It may be pressurizing and heating the laminate using the press heater. The heating and pressurizing conditions due to the press unit can be applied to the first heat press step and the second heat press step described above.

In an exemplary embodiment of the present application, a gripper for fixing the stack of the first electrode, the separator, and the second electrode may be further included during heating and pressurization by the press unit. Specifically, the gripper may be applied in the first heat press step described above.

In an exemplary embodiment of the present application, the press unit may include a first press unit and a second press unit. Specifically, the first press unit and the second press unit may be applied to the first heat press step and the second heat press step described above, respectively, and the heating conditions and pressurization conditions described above may be applied.

In an exemplary embodiment of the present application, the first press unit includes a pair of first pressing blocks, and the pressing surface of the pair of first pressing blocks includes a groove of a shape corresponding to the gripper, and the groove The external pressing surface may be provided as a flat surface. That is, the first press unit may be applied in the first heat press step described above.

In an exemplary embodiment of the present application, the second press unit may include a pair of second pressing blocks, and the pressing surfaces of the pair of second pressing blocks may be provided as flat surfaces. That is, the second press unit may be applied in the second heat press step described above.

Figure 6(a) is a perspective view showing the first press unit 50 according to an exemplary embodiment of the present invention, and Figure 6(b) shows the second press unit 60 according to an exemplary embodiment of the present invention. This is a perspective view.

Referring to FIG. 6(a), the first press unit 50 can heat and press the laminate S while fixing it with the gripper 51. The first press unit 50 is composed of a pair of first pressing blocks 50a and 50b, and the pair of first pressing blocks 50a and 50b are connected to the fixing portion 51b of the gripper 51. ) Except for the groove of the corresponding shape, all pressurizing surfaces are provided as flat surfaces.

The gripper 51 includes a main body 51a that corresponds to the length (x) and height (y) of the stack (S) or is provided wider than the length (x) and height (y) of the stack (S). A plurality of fixing parts 51b may be provided on one side of the main body 51a and may be provided in the form of a pillar or plate along the width (z) direction of the laminate S. Here, the length (x) of the stack (S) refers to the longest distance from one end of the stack (S) to the other end, and the height (y) refers to the distance in the stacking direction of the stack (S). And the width (z) may mean the distance horizontally crossing the upper surface of the stack (S).

The fixing part 51b can be positioned along the height direction of the main body 51a, so that the fixing part 51b is in contact with the upper and lower surfaces of the laminate S and the laminate S, the laminate ( S) can be fixed. Thereafter, the pair of first pressing blocks (50a and 50b) included in the first press unit 50 are moved in directions facing each other and pressurize one or more of the stacked product (S) and the gripper (51). Thus, adhesion can be achieved between the electrode and the separator included in the laminate (S).

Referring to FIG. 6(b), the second press unit 60 can finally heat and pressurize the laminate S that was initially heated and pressed by the first press unit 50. The second press unit 60 includes a pair of second pressure blocks 60a and 60b, and the pair of pressure blocks 61 and 62 are moved in directions facing each other and press the laminate S. It can be pressurized. In addition, the pair of second pressing blocks 60a and 60b included in the second press unit 60 may have all flat pressing surfaces that contact and press the laminate S.

In an exemplary embodiment of the present application, the first electrode supply unit includes a first electrode seating table on which the first electrode is placed before being stacked on the stack table by the first electrode stack unit, and the second electrode The supply unit may include a second electrode seating table on which the second electrode is placed before being stacked on the stack table by the second electrode stack unit.

In an exemplary embodiment of the present application, the first electrode stack unit includes a first suction head for vacuum suctioning the first electrode seated on the first electrode seating table, and the second electrode stack unit includes the second electrode. It may include a second suction head that vacuum-suctions the second electrode seated on the seating table.

As described above, the electrode assembly manufacturing apparatus according to an exemplary embodiment of the present application includes a mandrel having an air ejection port, and the mandrel having the air ejection port is capable of injecting air. Inlet; and one or more air ejection ports, wherein the air ejection ports may be formed in a direction facing one surface of the first electrode, the second electrode, or the separator. That is, both the electrode assembly manufacturing apparatus and the electrode assembly manufacturing method according to the present application may include a mandrel having the air ejection port.

Referring to Figures 1 and 2, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention includes a stack table 110, a separator supply unit 120 that supplies the separator 14, and a first electrode ( A first electrode supply unit 130 that supplies 11), a second electrode supply unit 140 that supplies the second electrode 12, and a first electrode that stacks the first electrode 11 on the stack table 110. A second electrode stack unit 160 that stacks the stack unit 150 and the second electrode 12 on the stack table 110, and the first electrode 11, the separator 14, and the second electrode 12 ) includes a press unit 180 that bonds between the two. In addition, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention further includes a mandrel 170 for fixing the first electrode 11 and the second electrode 12 when they are stacked on the stack table 110. It can be included.

Additionally, in one embodiment of the present invention, the first electrode, the separator, and the second electrode may be supplied to the stack table while being heated.

That is, the separator supply unit may supply the separator to the stack table while heating the separator, and the first electrode supply unit and the second electrode supply unit may heat the first electrode and the second electrode, respectively, while supplying the first electrode and the second electrode to the stack table. It may be supplying a second electrode.

Figure 3 is a cross-sectional view illustrating an electrode assembly manufactured through an electrode assembly manufacturing apparatus or an electrode assembly manufacturing method according to an embodiment of the present invention.

Referring to Figures 1 to 3, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention stacks the first electrode 11, the separator 14, and the second electrode 12 to form an electrode assembly ( 10) It is a device that manufactures.

As shown in FIG. 3, the electrode assembly 10 is generally a power generation element capable of charging and discharging, and is composed of a first electrode 11, a separator 14, and a second electrode 12 alternately stacked and assembled. can be formed. Here, the electrode assembly 10 is, for example, the separator 14 is folded in a zigzag shape, and the first electrode 11 and the second electrode 12 are alternately disposed between the folded separators 14. It may be in the form. At this time, the electrode assembly 10 may be provided in a form where the outermost layer is surrounded by a separator 14.

In an exemplary embodiment of the present application, the mandrel having the air injection port includes an air injection port through which air can be injected; and one or more air ejection ports, wherein the air ejection ports may be formed in a direction facing one surface of the first electrode, the second electrode, or the separator.

In an exemplary embodiment of the present application, the diameter of the air injection port may be less than 1 mm.

Figure 4 is a cross-sectional view illustrating a mandrel with an air ejection port according to the present application.

Referring to Figures 1 to 4, the mandrel according to the present application includes an air inlet (a) through which air can be injected and one or more air ejection ports (b). That is, it can be confirmed that a plurality of air ejection ports (b) are formed in the direction A-A'. At this time, the one or more air injection ports (b) are formed in a direction facing one surface of the first electrode 11, the second electrode 12, or the separator 14, respectively. That is, in the process of stacking the laminate of the first electrode 11, the separator 14, and the second electrode 12, one or more air ejection ports (b) face the first electrode 11 and the separator 14. , may be formed to face the second electrode 12 and the separator 14.

In addition, as can be seen in the cross-sectional view in the direction A-A', when air is injected through the air injection port (a), air can be sprayed through each air injection port (b). At this time, since the opposite side of the air inlet (a) has a closed structure, it has a structure that makes it easier to spray air with a certain pressure.

By having this structure, the electrode is placed on a mandrel in order to stack the separator 14 to surround the first electrode 11 or the second electrode 12 while moving the stack table 110 or moving the separator 14. After fixing with (170) or stacking the separator 14 to surround the first electrode 11 or the second electrode 12, fixing the electrode by the mandrel 170 is released to stack the next electrode. In the process, the air injected through the air inlet (a) may be discharged through the one or more air ejection ports (b).

As a result, damage to the electrodes and separators can be minimized by reducing friction that occurs between the mandrel and the electrodes and separators stacked during the mandrel's movement.

In one embodiment of the present application, the separator supply unit may further include a separator roll on which the separator is wound. The separator wound around the separator roll is gradually unwound and may be supplied to the stack table. That is, the separator may be in the form of a separator sheet.

Figure 7 is a perspective view showing a stack table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 2 and 7, the stack table 110 has first electrodes 11 and second electrodes 12 alternately arranged between folded separators 14. The electrode 11, the separator 14, and the second electrode 12 may be stacked.

In addition, the stack table 110 heats the table body 111 and the table body 111 on which the first electrode 11, the separator 14, and the second electrode 12 are stacked, and the stacked product ( It may include a stack table heater 112 that heats S).

The first electrode 11 may be configured as an anode, and the second electrode 12 may be configured as a cathode, but the present invention is not necessarily limited thereto. For example, the first electrode 11 may be configured as a cathode. It is composed of, and the second electrode 12 may be composed of an anode.

Figure 8 is a perspective view showing a first electrode seating table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 2 and 8 , the first electrode supply unit 130 may supply the first electrode 11 to the first electrode stack unit 150 while heating the first electrode 11 .

In addition, the first electrode supply unit 130 includes a first electrode seating table 131 and a first electrode on which the first electrode 11 is placed before being stacked on the stack table 110 by the first electrode stack unit 150. It may include a first electrode heater 132 that heats the first electrode 11 by heating the seating table 131.

Meanwhile, the first electrode supply unit 130 includes a first electrode roll 133 in which the first electrode 11 is wound in the form of a sheet, and a first electrode in the form of a sheet wound on the first electrode roll 133. A first cutter 134 that cuts at regular intervals when the (11) is released and supplied to form a first electrode 11 of a predetermined size, and a first electrode cut by the first cutter 134 ( 11), which moves the first conveyor belt 135 and the first electrode 11 transported by the first conveyor belt 135 by vacuum suction and seating it on the first electrode seating table 131. It may further include a first electrode supply head 136. Here, the first cutter 134 can cut the sheet-shaped first electrode 11 so that the first electrode tab 11a protrudes at the end.

Figure 9 is a perspective view showing a second electrode seating table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 2 and 9 , the second electrode supply unit 140 may heat the second electrode 12 and supply it to the second electrode stack unit 160 .

In addition, the second electrode supply unit 140 includes a second electrode seating table 141 and a second electrode on which the second electrode 12 is placed before being stacked on the stack table 110 by the second electrode stack unit 160. It may include a second electrode heater 142 that heats the second electrode 12 by heating the seating table 141.

Meanwhile, the second electrode supply unit 140 includes a second electrode roll 143 on which the second electrode 12 is wound in the form of a sheet, and a second electrode in the form of a sheet wound on the second electrode roll 143. When the (12) is released and supplied, the second cutter 144 is cut at regular intervals to form the second electrode 12 of a predetermined size, and the second electrode 12 cut by the second cutter 144 is cut. A second conveyor belt 145 that moves, and a second electrode supply head 146 that vacuum-adsorbs the second electrode 12 transported by the second conveyor belt 145 and places it on the second electrode seating table 141. ) may further be included. Here, the second cutter 144 can cut the sheet-shaped second electrode 12 so that the second electrode tab 12a protrudes at the end.

In one embodiment of the present invention, the first electrode stack unit includes a first suction head for vacuum suctioning the first electrode mounted on the first electrode mounting table, and the second electrode stack unit includes the second electrode. It may include a second suction head that vacuum-suctions the second electrode seated on the seating table.

Figure 10 is a perspective view showing a first suction head in the electrode assembly manufacturing apparatus according to an embodiment of the present invention, and Figure 11 is a bottom view showing the first suction head in the electrode assembly manufacturing apparatus according to an embodiment of the present invention. .

Referring to FIGS. 1, 2, 10, and 11, the first electrode stack unit 150 may stack the first electrode 11 on the stack table 110.

Additionally, the first electrode stack unit 150 may include a first suction head 151 and a first moving unit 153.

The first suction head 151 can vacuum suction the first electrode 11 mounted on the first electrode seating table 131. At this time, the first suction head 151 has a vacuum suction port 151a formed on the bottom surface 151b, and suctions the first electrode 11 through the vacuum suction port 151a. It can be fixed to the bottom surface (151b) of the head 151. Here, the first suction head 151 may have a passage connecting the vacuum suction port 151a and the vacuum suction device (not shown) formed therein.

The first moving unit 153 is a first suction head 151 so that the first suction head 151 can stack the first electrode 11 seated on the first electrode seating table 131 on the stack table 110. ) can be moved to the stack table 110.

Additionally, the second electrode stack unit 160 may stack the second electrode 12 on the stack table 110. Here, the second electrode stack unit 160 may have the same structure as the above-described first electrode stack unit 150. At this time, the second electrode stack unit 160 may include a second suction head 161 and a second moving unit 163.

The second suction head 161 may vacuum suction the second electrode 12 mounted on the second electrode seating table 141.

The second moving unit 163 is a second suction head 161 so that the second suction head 161 can stack the second electrode 12 mounted on the first electrode seating table 141 on the stack table 110. ) can be moved to the stack table 110.

Figure 12 is a plan view showing a mandrel and a stack table in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 2, 4, and 12, when the first electrode 11 or the second electrode 12 is stacked on the stack table 110, the mandrel 170 is connected to the first electrode 11 or the second electrode 12. 2 The electrode 12 can be held and fixed to the stack table 110.

In addition, the mandrel 170 presses and fixes the upper surface of the first electrode 11 stacked on the uppermost side of the stack table 110 when stacking the first electrode 11 on the stack table 110. When stacking the second electrode 12 on the stack table 110, the upper surface of the second electrode 12 stacked on the uppermost side of the stack table 110 can be pressed and fixed. Additionally, the upper surface of the stack of the first electrode 11, the separator 14, and the second electrode 12 stacked on the stack table 110 can be fixed by pressing.

That is, when the first electrode 11 and the second electrode 12 are positioned between the separators 14 and stacked to form a stack, the mandrel 170 is placed on the uppermost surface of the stack table. The stacked material can be prevented from being separated from the stack table 110 by holding it by applying pressure in the (110) direction.

Meanwhile, the mandrel 170 includes, for example, first mandrels 171a and 171b and second mandrels 172a and 172b, and connects both sides of the first electrode 11 or the second electrode 12. It can be fixed.

In addition, in this process, as described above, the stack table 110 is moved or the separator 14 is moved to stack the separator 14 to surround the first electrode 11 or the second electrode 12. After fixing the separator 14 with the mandrel 170 or stacking the separator 14 to surround the first electrode 11 or the second electrode 12, the electrode is used by the mandrel 170 to stack the next electrode. In the process of releasing the fixation, the air injected through the air inlet (a) may be discharged through the one or more air ejection ports (b).

This application uses a mandrel having an air ejection port, and the specific appearance is as shown in FIG. 4, and the form of the mandrel having an air ejection port shown in FIG. 4 is the first mandrel (171a). , 171b) and the second mandrel (172a, 172b), and the structures of all mandrels are the same.

Thereafter, after the mandrel 170 holds the first electrode 11 or the second electrode 12, the stack table 110 or the separator 14 moves left and right, and the separator 14 is moved to the separator roll 122. ) and can be supplied to the stack table 110. Meanwhile, for example, the stack table 110 can be moved left and right by being connected or combined with a stack table moving part (not shown), and the separator is supplied to the stack table while moving left and right by a separator guide part (not shown). It can be.

In this specification, description of the electrode assembly manufacturing apparatus may be applied to the electrode assembly manufacturing method, and vice versa.

In addition, in one embodiment of the present invention, the positive electrode is manufactured by, for example, applying a mixture of a positive electrode active material, a conductive material, and a binder on a positive electrode current collector and then drying it, and if necessary, a filler is added to the mixture. Additional may be added. The materials used at this time may be materials commonly used in the relevant field.

Specifically, the positive electrode active material may be, for example, a layered compound such as lithium cobalt oxide (LiCoO ₂ ) or lithium nickel oxide (LiNiO ₂ ) or a compound substituted with one or more transition metals; Lithium manganese oxide with the formula Li _1+x Mn _2-x O ₄ (where x is 0 to 0.33), LiMnO ₃ , LiMn ₂ O ₃ , LiMnO ₂ , etc.; lithium copper oxide (Li ₂ CuO ₂ ); Vanadium oxides such as LiV ₃ O ₈ , LiFe ₃ O ₄ , V ₂ O ₅ , and Cu ₂ V ₂ O ₇ ; Nisite-type lithium nickel oxide represented by the formula LiNi _1-x M _x O ₂ (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); _{Chemical formula} LiMn _{2 - x M} Lithium manganese complex oxide expressed as Ni, Cu or Zn); LiMn ₂ O ₄ in which part of Li in the chemical formula is replaced with an alkaline earth metal ion; disulfide compounds; Fe ₂ (MoO ₄ ) ₃ etc. may be mentioned, but it is not limited to these alone.

Specifically, the positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical changes in the battery, for example, stainless steel, aluminum, nickel, titanium, fired carbon, or aluminum or stainless steel. The surface of the stainless steel may be surface treated with carbon, nickel, titanium, silver, etc., but specifically, it may be aluminum. The current collector can increase the adhesion of the positive electrode active material by forming fine irregularities on its surface, and can be in various forms such as films, sheets, foils, nets, porous materials, foams, and non-woven materials. also. The positive electrode current collector may generally have a thickness of 3 ㎛ to 500 ㎛.

The conductive material can typically be added in an amount of 1 to 50% by weight based on the total weight of the mixture including the positive electrode active material. These conductive materials are not particularly limited as long as they are conductive without causing chemical changes in the battery.

No, for example, graphite such as natural graphite or artificial graphite; Carbon black such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as carbon fluoride, aluminum, and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives may be used.

The binder is a component that assists in the bonding of the active material and the conductive material and the bonding to the current collector, and is usually added in an amount of 1 to 50% by weight based on the total weight of the mixture containing the positive electrode active material. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, and polyethylene. , polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butyrene rubber, fluorine rubber, and various copolymers.

The filler is selectively used as a component to suppress expansion of the positive electrode, and is not particularly limited as long as it is a fibrous material that does not cause chemical changes in the battery. For example, olipine polymers such as polyethylene and polypropylene; Fibrous materials such as glass fiber and carbon fiber are used.

In addition, in one embodiment of the present invention, the negative electrode is manufactured by applying, drying, and pressing the negative electrode active material on a negative electrode current collector, and if necessary, conductive materials, binders, fillers, etc. as described above are optionally further added. may be included. In this case as well, materials commonly used in the relevant field may be used.

Specifically, the negative electrode active material includes, for example, carbon such as non-graphitizable carbon and graphitic carbon; LixFe ₂ O ₃ (0≤x≤1), Li _x WO ₂ (0≤x≤1), Sn _x Me _1-x Me'yOz (Me: Mn, Fe, Pb, Ge; Me': Al, B , P, Si, elements of groups 1, 2, and 3 of the periodic table, halogens; 0<x≤1;1≤z≤8); lithium metal; lithium alloy; silicon-based alloy; tin-based alloy; SnO, SnO ₂ , PbO, PbO ₂ , Pb ₂ O ₃ , Pb ₃ O ₄ , Sb ₂ O ₃ , Sb ₂ O ₄ , Sb ₂ O ₅ , GeO, GeO ₂ , Bi ₂ O ₃ , Bi ₂ O ₄ and metal oxides such as Bi ₂ O ₅ ; Conductive polymers such as polyacetylene; Li-Co-Ni based materials, etc. can be used.

This negative electrode current collector is not particularly limited as long as it is conductive without causing chemical changes in the battery, for example, copper, stainless steel, aluminum, nickel, titanium, fired carbon, copper or stainless steel.

Surface treatment with carbon, nickel, titanium, silver, etc., aluminum-cadmium alloy, etc. can be used. In addition, like the positive electrode current collector, the bonding power of the negative electrode active material can be strengthened by forming fine irregularities on the surface, and can be used in various forms such as films, sheets, foils, nets, porous materials, foams, and non-woven materials. Additionally, the negative electrode current collector may generally have a thickness of 3 ㎛ to 500 ㎛.

In one embodiment of the present invention, the separator may be an organic/inorganic composite porous SRS (Safety-Reinforcing Separator) separator. The SRS separator may have a structure in which a coating layer component including inorganic particles and a binder polymer is applied on a polyolefin-based separator substrate.

This SRS separator does not undergo high-temperature heat shrinkage due to the heat resistance of the inorganic particles, so even if the electrode assembly is penetrated by the needle-shaped conductor, the elongation of the safety separator can be maintained.

This SRS separator may have a uniform pore structure formed by the pore structure contained in the separator substrate itself as well as the interstitial volume between the inorganic particles that are components of the coating layer, and the pores are formed by the external force applied to the electrode assembly. Not only can the impact be significantly alleviated, but lithium ions can move smoothly through the pores, and a large amount of electrolyte can be filled to achieve a high impregnation rate, thereby improving battery performance.

In one embodiment of the present invention, the separator has a separator surplus portion extending on both sides of the width of the anode and the cathode based on the width direction, and a separator is formed on one or both sides of both sides of the separator surplus portion to prevent separator shrinkage. It is composed of a structure in which a coating layer thicker than the thickness of is formed.

In one embodiment of the present invention, the surplus portion of the separator may each have a size of 5% to 12% of the width of the separator.

In one embodiment of the present invention, the coating layer may be coated on both sides of the separator in a size of 50% to 90% of the width of the surplus portion of the separator on one side. Additionally, the widths of the coating layers on both sides may be the same or different sizes.

In one embodiment of the present invention, the coating layer may include inorganic particles and a binder polymer.

In one embodiment of the present invention, examples of the polyolefin-based separator component include high-density polyethylene, linear low-density polyethylene, low-density polyethylene, ultra-high molecular weight polyethylene, polypropylene, or derivatives thereof.

In one embodiment of the present invention, the thickness of the coating layer may be smaller than the thickness of the first electrode or the second electrode. In a specific example, the thickness of the coating layer may be 30% to 99% of the thickness of the first electrode or the second electrode.

In one embodiment of the present invention, the coating layer may be formed by wet coating or dry coating.

In one embodiment of the present invention, the substrate and the coating layer exist in a form in which pores and the coating layer on the surface of the polyolefin-based separator substrate are entangled with each other (anchoring), so that the separator substrate and the active layer can be physically firmly bonded. At this time, the substrate and the active layer may have a thickness ratio of 9:1 to 1:9, in consideration of the physical bonding force and the pore structure present on the separator, and in detail, may have a thickness ratio of 5:5.

In one embodiment of the present invention, the inorganic particles may be inorganic particles commonly used in the art. The inorganic particles enable the formation of empty spaces between the inorganic particles, forming fine pores, and also serve as a kind of spacer that can maintain the physical shape. In addition, since the inorganic particles generally have the property that their physical properties do not change even at high temperatures of 200°C or higher, the formed organic/inorganic composite porous film has excellent heat resistance.

Additionally, the inorganic particles are not particularly limited as long as they are electrochemically stable. That is, the inorganic particles that can be used in the present invention are not particularly limited as long as they do not cause oxidation and/or reduction reactions in the operating voltage range of the battery to which they are applied (e.g., 0 to 5 V based on Li/Li+). In particular, when using inorganic particles capable of ion transport, performance can be improved by increasing ionic conductivity within the electrochemical device, so it is desirable for the ionic conductivity to be as high as possible. In addition, when the inorganic particles have a high density, not only is it difficult to disperse them during coating, but there is also a problem of weight increase during battery manufacturing, so it is preferable that the density is as low as possible. In addition, in the case of an inorganic material with a high dielectric constant, it can contribute to increasing the degree of dissociation of electrolyte salts, such as lithium salts, in the liquid electrolyte, thereby improving the ionic conductivity of the electrolyte solution.

For the above-mentioned reasons, the inorganic particles may be one or more types selected from the group consisting of inorganic particles having piezoelectricity and inorganic particles having lithium ion transport ability.

The piezoelectric inorganic particles are insulators at normal pressure, but refer to a material that conducts electricity due to changes in its internal structure when a certain pressure is applied. It not only exhibits high dielectric constant characteristics with a dielectric constant of 100 or more, but also conducts electricity at a constant pressure. It is a material that has the function of generating a potential difference between both sides by generating an electric charge when it is stretched or compressed by applying a charge, making one side positively charged and the other side negatively charged.

When inorganic particles with the above characteristics are used as a coating layer component, if an internal short circuit of the positive electrode occurs due to an external impact such as a needle-like conductor, the anode and cathode are in direct contact due to the inorganic particles coated on the separator. In addition, due to the piezoelectricity of the inorganic particles, a potential difference within the particle occurs, which causes electron movement between the two electrodes, that is, a minute flow of current, resulting in a gradual decrease in battery voltage and thus improved safety. It can be promoted.

Examples of the inorganic particles having piezoelectricity include BaTiO ₃ , Pb(Zr,Ti)O ₃ (PZT), Pb _1-x La _x Zr _1-y Ti _y O ₃ (PLZT), PB(Mg ₃ Nb _2/3 )O ₃ -PbTiO ₃ It may be one or more selected from the group consisting of (PMN-PT) and hafnia (HfO ₂ ), but is not limited thereto.

The inorganic particles having the ability to transport lithium ions refer to inorganic particles that contain lithium element but do not store lithium and have the function of moving lithium ions. The inorganic particles having the ability to transport lithium ions are present inside the particle structure. Since lithium ions can be transferred and moved due to a type of defect, lithium ion conductivity in the battery is improved, thereby improving battery performance.

Examples of inorganic particles having the ability to transport lithium ions include lithium phosphate (Li ₃ PO ₄ ), lithium titanium phosphate (Li _x Ti _y (PO ₄ ) ₃ , 0<x<2, 0<y<3), and lithium aluminum. Titanium phosphate (Li _x Al _y Ti _z (PO ₄ ) ₃ , 0< _x <2, 0<y<1, 0<z<3), ( _LiAlTiP ) <y<13), lithium lanthanum titanate (Li _x La _y TiO ₃ , 0<x<2, 0<y<3), lithium germanium thiophosphate (Li _x Ge _y P _z S _w , 0<x <4, 0<y<1, 0<z<1, 0<w<5), lithium nitride (Li _x N _y , 0<x<4, 0<y<2), SiS ₂ (Li _x Si _y S _z , 0<x<3, 0<y<2, 0<z<4) series glass and P ₂ S ₅ (Li _x P _y S _z , 0<x<3, 0<y<3, 0 It may be one or more types selected from the group consisting of <z<7) series glass, but is not limited thereto.

The composition ratio of the inorganic particles and binder polymer, which are the components of the coating layer, is not particularly limited, but can be adjusted within the range of 10:90 to 99:1 weight%, and is preferably in the range of 80:20 to 99:1 weight%. If the ratio is less than 10:90% by weight, the polymer content becomes too high, resulting in a decrease in pore size and porosity due to a decrease in the empty space formed between the inorganic particles, resulting in a decrease in final battery performance, and conversely, at 99:1% by weight. If the ratio is exceeded, the mechanical properties of the final organic/inorganic composite porous separator may deteriorate due to weakening of the adhesion between inorganic materials because the polymer content is too small.

In one embodiment of the present invention, the binder polymer commonly used in the art may be used.

The coating layer of the organic/inorganic composite porous separator may further include other commonly known additives in addition to the above-described inorganic particles and binder polymer.

In one embodiment of the present invention, the coating layer may be referred to as an active layer.

Although the present invention has been described in detail through specific examples, this is for the purpose of specifically illustrating the present invention, and the electrode assembly manufacturing apparatus according to the present invention is not limited thereto. It can be said that various implementations are possible by those skilled in the art within the technical spirit of the present invention.

10: Electrode assembly
11: first electrode
11a: first electrode tab
12: second electrode
12a: second electrode tab
14: Separator
15: mold
51: Gripper
51a: main body
51b: fixing part
100,200: Electrode assembly manufacturing device
110: stack table
111: table body
112: Stack table heater
120: Separator supply unit
121: Separator heating unit
122: Separator roll
130: first electrode supply unit
131: First electrode seating table
132: first electrode heater
133: first electrode roll
134: first cutter
135: first conveyor belt
136: first electrode supply head
140: Second electrode supply unit
141: Second electrode seating table
142: second electrode heater
143: second electrode roll
144: second cutter
145: second conveyor belt
146: second electrode supply head
150: first electrode stack part
151: first suction head
151a: Vacuum inlet
151b: bottom surface
152: first head heater
153: first moving part
160: second electrode stack part
161: Second suction head
162: second head heater
163: Second moving unit
170: Mandrel
171: first mandrel
172: Second mandrel
a: air inlet
b: air outlet
180: Press department
181: First pressurizing block
182: Second pressurizing block
183,184: Press heater
S: Laminate

Claims (12)

Supplying a first electrode to a stack table;
supplying a second electrode to a stack table;
Supplying a separator to a stack table;
manufacturing a laminate by stacking the first electrode, the separator, and the second electrode along a stacking axis on a stack table in a form where the first electrode and the second electrode are alternately arranged between the folded separators; and
After manufacturing the laminate, it relates to a method of manufacturing an electrode assembly including a heat press step of heating and pressurizing the laminate,
The step of manufacturing the laminate is
(S1) stacking a separator on the stack table and stacking the first electrode or the second electrode on the stacked separator;
(S2) fixing the stacked first or second electrodes with a mandrel having an air outlet;
(S3) stacking the separator to surround the first or second electrode fixed with the mandrel while moving the stack table left or right or the separator left or right; and
(S4) After the separator is laminated, releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode;
(S5) After releasing the fixation of the mandrel, laminating the first electrode or the second electrode on the separator,
Steps (S1) to (S5) are performed one or more times,
fixing the stacked first or second electrodes with a mandrel having an air outlet; and the step of releasing the fixation of the mandrel having the air outlet to the first electrode or the second electrode includes spraying air from the air outlet of the mandrel, respectively. Manufacturing method. In claim 1,
The step of spraying air from the air ejection port of the mandrel is
A method of manufacturing an electrode assembly comprising spraying air for 1 to 10 seconds under a pressure condition of 0.5 MPa to 1.5 MPa. In claim 1,
After manufacturing the laminate, the heat press step of heating and pressing the laminate is
A first heat press step of holding the laminate with a gripper and heating and pressing the laminate; and
After the first heat press step, the electrode assembly manufacturing method includes a second heat press step of stopping the grip of the gripper and heating and pressing the laminate. In claim 3,
The first heat press step of holding the laminate with a gripper and heating and pressing the laminate is
fixing the laminate by pressing the upper surface of the laminate using a gripper;
moving the laminate and the stack table fixed by the gripper between a pair of pressing blocks spaced apart by a distance longer than the sum of the thicknesses of the laminate and the stack table;
pressurizing the fixed laminate by moving the pair of pressure blocks to be closer to each other along the stacking direction of the laminate; and
A method of manufacturing an electrode assembly comprising heating the stack by a heater included in the stack table or the pair of pressing blocks while pressing the stack. In claim 3,
After the first heat press step, the gripping of the gripper is stopped, and the second heat press step of heating and pressing the laminate is performed.
stopping heating and pressurizing the laminate after the first heat press step; separating the gripper from the stack;
pressurizing the fixed laminate by moving the pair of press blocks so that the gripper approaches each other along the stacking direction of the spaced apart laminate; and
An electrode assembly manufacturing method comprising heating the stack by a heater included in the stack table and a pair of pressing blocks while pressing the stack. In claim 1,
The mandrel having the air ejection port is
An air inlet through which air can be injected; and
Containing one or more air ejection ports,
The method of manufacturing an electrode assembly wherein the air injection port is formed in a direction facing one surface of the first electrode, the second electrode, or the separator. An electrode assembly device for manufacturing an electrode assembly by stacking a first electrode, a separator, and a second electrode,
a stack table for manufacturing a laminate in which the first electrodes and the second electrodes are alternately arranged between the folded separators along the stacking axis;
a separator supply unit that supplies the separator to the stack table;
a first electrode supply unit supplying the first electrode to the stack table;
a second electrode supply unit supplying the second electrode to the stack table;
a first electrode stack unit that stacks the first electrode supplied from the first electrode supply unit on the stack table;
a second electrode stack unit that stacks the second electrode supplied from the second electrode supply unit on the stack table;
a mandrel having an air outlet for fixing the stacked first or second electrodes; and
An electrode assembly manufacturing apparatus including a press unit that heats and presses the laminate to adhere the first electrode, the separator, and the second electrode. In claim 7,
a stack table moving unit that moves the stack table left and right; Or an electrode assembly manufacturing apparatus comprising a separator guide part that moves the separator left and right. In claim 7,
The press unit further includes a pair of pressurizing blocks and a press heater for heating the pressurizing blocks,
A pair of the pressure blocks are moved in directions facing each other and pressurize the laminate,
An electrode assembly manufacturing device that heats the laminate by the press heater. In claim 7,
The first electrode supply unit includes a first electrode seating table on which the first electrode is placed before being stacked on the stack table by the first electrode stack unit,
The second electrode supply unit is an electrode assembly manufacturing apparatus including a second electrode seating table on which the second electrode is placed before the second electrode is stacked on the stack table by the second electrode stack unit. In claim 10,
The first electrode stack unit includes a first suction head that vacuum-suctions the first electrode mounted on the first electrode mounting table,
The second electrode stack unit is an electrode assembly manufacturing apparatus including a second suction head that vacuum-suctions the second electrode mounted on the second electrode mounting table. In claim 7,
The mandrel having the air ejection port is
An air inlet through which air can be injected; and
Containing one or more air ejection ports,
The electrode assembly manufacturing apparatus is wherein the air injection port is formed in a direction facing one surface of the first electrode, the second electrode, or the separator.