WO2018182129A1

WO2018182129A1 - Electrode stacking method and electrode stacking apparatus for performing same

Info

Publication number: WO2018182129A1
Application number: PCT/KR2017/013644
Authority: WO
Inventors: 윤진국; 신종훈
Original assignee: (주)이티에스
Priority date: 2017-03-28
Filing date: 2017-11-28
Publication date: 2018-10-04
Also published as: KR20180109576A

Abstract

The present invention relates to an electrode stacking method and an electrode stacking apparatus for performing the same and, more particularly, to an electrode stacking method for forming an electrode stack for a secondary battery by alternately stacking electrodes and a separator, and an electrode stacking apparatus for performing the same. Disclosed is an electrode stacking apparatus of a secondary battery cell (20) in which first electrode sheets (13) and second electrode sheets (14) are stacked alternately and separators (12) are positioned between the first electrode sheets (13) and the second electrode sheets (14), the electrode stacking apparatus comprising: a stacking stage (100) in which the first electrode sheets (13), the second electrode sheets (14), and separators (14) are stacked; a first electrode sheet supplying unit (200) for supplying the first electrode sheets (13) to a predetermined seating position (P) on the stacking stage (100); a second electrode sheet supply unit (300) for supplying the second electrode sheets (14) to the seating position (P) of the stacking stage (100); and a separator supplying unit (400) for supplying the separators (12) to the seating position (P) of the stacking stage (100).

Description

Electrode lamination method and electrode lamination apparatus performing the same

The present invention relates to an electrode lamination method and an electrode lamination apparatus for performing the same, and more particularly, to an electrode lamination method for forming an electrode laminated body for a secondary battery by alternately stacking electrodes and separators, and an electrode lamination apparatus for performing the same. .

In general, a chemical cell is composed of a pair of electrodes and an electrolyte of a positive electrode and a negative electrode, and the amount of energy that can be stored varies depending on the material of the electrode and the electrolyte.

These chemical cells are classified into a primary battery used only for one-time discharge because of a very slow charging reaction, and a secondary battery that can be reused through repeated charging and discharging.

Secondary batteries are applied to various technical fields throughout the industry. For example, secondary batteries are used as energy sources for advanced electronic devices such as wireless mobile devices, and air pollution of existing gasoline and diesel internal combustion engines using fossil fuels. It is also attracting attention as an energy source for hybrid electric vehicles, which is being proposed as a solution for this.

Secondary batteries are manufactured in various ways depending on the shape of the case housing the electrode assembly, and typical shapes include cylindrical, rectangular, and pouch types.

In general, the cylindrical secondary battery uses a cylindrical aluminum can, the rectangular secondary battery uses a rectangular aluminum can, and the pouch type secondary battery is sealed with a pouch in which a thin aluminum laminate film made of aluminum is used as a pack. It is relatively light in weight and excellent in stability and is widely used in recent years.

For example, a configuration of a pouch-type secondary battery includes a stack, which is an electrode assembly formed by interposing a separator, which is a separator between a negative electrode and a positive electrode, and an aluminum-laminated film by sealing the stack therein. The pouch is formed, and one end is connected to the stack, and the other end is exposed to the outside of the pouch and is composed of a plate-shaped negative electrode tab for inducing current to the outside.

Lifting or damaging of the electrodes in the electrode stacking process of the secondary battery, or when the separator interposed between the electrodes is caused by the failure of the secondary battery there is a problem that the productivity of the device is lowered.

An object of the present invention is to recognize the trend and the necessity as described above, by pressing the upper surface of the separator when the separator is laminated on the secondary battery cell electrode stack of the secondary battery cell that can form a laminated structure of the secondary battery cell densely It is to provide a method and an electrode lamination apparatus for performing the same.

In particular, the present invention can improve the sealing of the edge of the electrode laminated body formed by stacking the electrode and the separator by joining the edges of the neighboring separator by separately providing an outer pressing unit for heating and / or pressing the edge of the upper surface of the separator. The present invention provides an electrode lamination method for a secondary battery cell and an electrode lamination apparatus for performing the same.

The present invention was created to achieve the object of the present invention as described above, the present invention, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other and the first electrode sheet 13 ) And an electrode lamination apparatus of the secondary battery cell 20 in which the separator 12 is positioned between the second electrode sheet 14 and the first electrode sheet 13, the second electrode sheet 14, and the separator 14. Lamination stage 100 is laminated; A first electrode sheet supply unit 200 for supplying a first electrode sheet 13 to a predetermined mounting position P on the stacking stage 100; A second electrode sheet supply unit 300 for supplying a second electrode sheet 14 to the seating position P of the stacking stage 100; It includes a separator supply unit 400 for supplying a separator 12 to the seating position (P) of the stacking stage (100).

The separation membrane supply unit 400 may include a separation membrane transfer unit 430 which absorbs and fixes the separation membrane 12 to be transferred to the seating position P of the multilayer stage 100.

The separator transfer part 430 includes an adsorption part 510 for fixing the upper surface of the separator 12 by vacuum suction, and the stacked first electrode sheet 13, the second electrode sheet 14, and the separator ( 12) may include a membrane pressing unit 520 for pressing at least a portion of the upper surface of the separation membrane 12 transferred to the seating position (P) for close contact therebetween.

The first electrode sheet supplying part 200 includes a first electrode sheet loading part 210 in which a plurality of first electrode sheets 13 are stacked, and a first electrode transferred from the first electrode sheet loading part 210. A first electrode sheet aligning unit 220 for aligning the horizontal position of the sheet 13, the first electrode sheet stacking portion 210, the first electrode sheet aligning portion 220 and the stacking stage 100 It may include a first electrode sheet transfer unit 230 for transferring the first electrode sheet 13 therebetween.

The first electrode sheet aligning unit 220, the first electrode sheet 13 transferred from the first electrode sheet stacking portion 210 is seated, in any one direction of the X-axis, Y-axis and Θ axis A first electrode sheet alignment stage which is movably installed, a first electrode sheet image acquisition unit which acquires an upper image of the first electrode sheet 13 seated on an upper surface of the first electrode sheet alignment stage, and the first electrode It may include a control unit for controlling the horizontal position of the first electrode sheet alignment stage based on the first electrode sheet image obtained by the sheet image acquisition unit.

The second electrode sheet supply unit 300 includes a second electrode sheet stacking unit 310 in which a plurality of second electrode sheets 14 are stacked, and a second electrode transferred from the second electrode sheet stacking unit 310. The second electrode sheet aligning unit 320 for aligning the horizontal position of the sheet 14, the second electrode sheet stacking unit 310, the second electrode sheet aligning unit 320, and the stacking stage 100. It may include a second electrode sheet transfer unit 330 for transferring the second electrode sheet 14 therebetween.

The second electrode sheet aligning unit 320 is mounted on the second electrode sheet 14 transferred from the second electrode sheet stacking unit 310 in the direction of any one of X, Y, and Θ axes. A second electrode sheet alignment stage which is movably installed, a second electrode sheet image acquisition unit for acquiring an upper image of the second electrode sheet 14 seated on an upper surface of the second electrode sheet alignment stage, and the second electrode It may include a control unit for controlling the horizontal position of the second electrode sheet alignment stage based on the second electrode sheet image obtained by the sheet image acquisition unit.

The separator supply unit 400 may include a separator stacking unit 410 in which a plurality of separators 12 are stacked, and a membrane alignment unit for aligning horizontal positions of the separator 12 transferred from the separator stacking unit 410. 420.

The separator transfer unit 430 may transfer the separator 12 from the separator alignment unit 420 to a seating position P of the multilayer stage 100. It may be installed movably between 100).

The electrode laminating apparatus includes a pair of separator supply units 400, and the pair of separator supply units 400 are installed to face each other with respect to the stacked stage 100, and the stacked stage 100. Separation membrane 12 may be sequentially supplied to the seating position (P).

The electrode 10 is disposed at a central portion inside the outer edge of the separator 12, and the separator pressing part 520 presses at least a portion of the central part of the separator 12 to press the central pressure part 530. And, it may include an outer pressing unit 540 for pressing at least a portion of the outer edge portion of the separation membrane 12.

The central pressurizing unit 530 and the outer pressurizing unit 540 may be coupled to move relative up and down.

The adsorption part 510 may be formed at the central pressure part 530.

The central pressurizing part 530 may have convex bends formed on an adsorption surface in contact with an upper surface of the adsorptive separator 12.

A plurality of outer pressurizing regions 22 are set along the edge outer portion of the separation membrane 12, and the outer pressurizing portion 540 corresponds to the plurality of outer pressurizing regions 22 and is installed in a movable manner. The outer pressurizing member 542 may include.

The plurality of outer pressurizing members 542 may be moved independently.

At least one of the central pressurizing part 530 and the outer pressurizing part 540 presses the separator 12 in order to attach the stacked separator, the first electrode sheet 13 and the second electrode sheet 14 to each other. The heater unit 550 for heating the separation membrane 12 may be provided.

According to the present invention, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other, and the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14. As the electrode stacking method of the secondary battery cell 20, the stacking stage 100 in which the first electrode sheet 13 is stacked with the first electrode sheet 13, the second electrode sheet 14, and the separator 14. Supplying a first electrode sheet to a predetermined mounting position P on the substrate; Supplying a second electrode sheet (14) to the seating position (P) of the stacking stage (100); The separator 12 may include a separator supplying step of supplying the separator 12 to the seating position P of the stacked stage 100.

The membrane supply step includes a membrane transfer step of adsorbing and fixing the separator 12 and transferring the membrane 12 to a seating position P of the multilayer stage 100, and stacking the first electrode sheet 13 and the second electrode sheet 14. And a membrane pressurizing step of pressurizing at least a portion of the upper surface of the membrane 12 transferred to the seating position P for adhesion between the membranes 12.

Electrode lamination method of the secondary battery cell according to the present invention and the electrode laminating apparatus for performing the same, the advantage that can improve the performance of the secondary battery cell by pressing the upper surface of the separator to form a compact electrode laminated structure when the separator laminated There is this.

In particular, the electrode stacking method of the secondary battery cell and the electrode stacking device performing the same according to the present invention, by bonding the edges of the neighboring separator by separately providing an outer pressing unit for heating and / or pressing the edge of the upper surface of the separator 2 There is an advantage that can improve the sealing of the edge of the battery cell.

In addition, the electrode stacking method of the secondary battery cell and the electrode stacking device for performing the same according to the present invention, before supplying the first electrode sheet and the second electrode sheet to the laminated stage for the first electrode sheet and the second electrode sheet Alignment of the horizontal position prevents the positional deviation between the stacked electrode sheets and the separator even during sequential stacking, thereby preventing defects or performance degradation caused by the positional deviation between the electrode sheets and the separator. There is this.

1 is a plan view showing an electrode laminating apparatus of a secondary battery cell according to an exemplary embodiment of the present invention.

FIG. 2 is a plan view illustrating the secondary battery cell of FIG. 1.

3A to 3C are cross-sectional views showing a part of a configuration of an electrode stacking device of the secondary battery cell of FIG. 1 and a cross-sectional view showing the operation of the electrode stacking device of the secondary battery cell.

4 is an enlarged view illustrating a part of a configuration of an electrode lamination apparatus of the rechargeable battery cell of FIG. 1.

5 is a plan view illustrating an electrode lamination apparatus of a secondary battery cell according to another exemplary embodiment of the present invention.

Hereinafter, an electrode laminating apparatus of a secondary battery cell according to the present invention will be described with reference to the accompanying drawings.

In the electrode stacking apparatus of the secondary battery cell according to the present invention, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked, and the first electrode sheet 13 and the second electrode sheet 14 are stacked. Various arrangements are possible as an electrode laminating apparatus of the secondary battery cell 20 in which the separator 12 is positioned between them.

The secondary battery cell 20 is laminated with the first electrode sheet 13 and the second electrode sheet 14 alternately with each other, and a separator between the first electrode sheet 13 and the second electrode sheet 14. Various configurations are possible with the electrode assembly having 12 positioned thereon.

The secondary battery cell 20 may be accommodated in a pouch made of an aluminum-laminate film to become a basic unit of a secondary battery.

The first electrode sheet 13 forms a positive electrode and the second electrode sheet 14 forms a negative electrode, or the first electrode sheet 13 forms a negative electrode, and the second electrode sheet 14 forms a positive electrode. Can be achieved.

For example, when the first electrode sheet 13 is made of Cu and the second electrode sheet 14 is made of Al, the first electrode sheet 13 forms a positive electrode, and the second electrode sheet is formed. 14 may form a negative electrode.

The first electrode sheet 13 and the second electrode sheet 14 may be processed into rectangular sheets having a predetermined length and width.

In this case, one side of the first electrode sheet 13 and the second electrode sheet 14 may be provided with an electrode tab 15 constituting the positive electrode and the negative electrode of the secondary battery cell 20.

The separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14 of the secondary battery cell 20 to form the first electrode sheet 13 and the second electrode sheet 14. Separator to separate.

The separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14 to completely separate the first electrode sheet 13 and the second electrode sheet 14. It is preferable to process into a rectangular sheet having a length and a larger width than the 13 and the second electrode sheet 14.

Therefore, in the stacked structure of the secondary battery cell 20, the first electrode sheets 13 and the second electrode sheets 14 may be disposed at an inner central portion except for the outer edge of the separator 12.

In one embodiment, the electrode lamination apparatus of the secondary battery cell 20 of the present invention, as shown in Figure 1 and 3c, the first electrode sheet 13, the second electrode sheet 14 and the separator ( A stacking stage 100 in which the stacking 14 is performed; A first electrode sheet supply unit 200 for supplying the first electrode sheet 13 to a preset mounting position P on the stacking stage 100; A second electrode sheet supply part 300 for supplying the second electrode sheet 14 to the seating position P of the stacking stage 100; It may include a separator supply unit 400 for supplying the separator 12 to the seating position (P) of the stacking stage (100).

The stacking stage 100 may be configured to provide a place where the supplied first electrode sheet 13, the second electrode sheet 14, and the separator 14 are stacked.

The stacking stage 100 may have a predetermined mounting position P on which the first electrode sheet 13, the second electrode sheet 14, and the separator 14 on the upper surface are seated.

The first electrode sheet 13, the second electrode sheet 14, and the separator 14 supplied to the stacking stage 100 may be sequentially stacked to form the secondary battery cell 20 according to the supplied order. Can be.

The first electrode sheet supply unit 200 may be configured to supply the first electrode sheet 13 to a predetermined mounting position P on the stacking stage 100.

For example, the first electrode sheet supply unit 200 may include a first electrode sheet stacking unit 210 in which a plurality of first electrode sheets 13 are stacked, and a first electrode sheet stacking unit 210 transferred from the first electrode sheet stacking unit 210. Between the first electrode sheet sorting unit 220 and the first electrode sheet stacking unit 210, the first electrode sheet sorting unit 220, and the stacking stage 100 to align the horizontal position of the first electrode sheet 13. In the first electrode sheet 13 may include a first electrode sheet transfer unit 230 for transferring.

The first electrode sheet loading part 210 has a configuration in which a plurality of first electrode sheets 13 are stacked, and may include loading members such as a magazine or a carrier.

The first electrode sheet aligning unit 220 may be configured to align the horizontal position of the first electrode sheet 13 transferred from the first electrode sheet stacking unit 210.

For example, in the first electrode sheet alignment unit 220, the first electrode sheet 13 transferred from the first electrode sheet loading unit 210 is seated, and any one of an X axis, a Y axis, and a Θ axis may be disposed. The first electrode sheet alignment stage (not shown) installed to be movable in the direction, and the first electrode sheet image acquisition unit for acquiring the top image of the first electrode sheet 13 mounted on the upper surface of the first electrode sheet alignment stage ( And a controller (not shown) for controlling a horizontal position of the first electrode sheet alignment stage based on the first electrode sheet image acquired by the first electrode sheet image acquisition unit.

The first electrode sheet alignment stage is mounted on the first electrode sheet 13 transferred from the first electrode sheet stacking unit 210 and movable in one of X, Y, and Θ axes. Various configurations are possible with the configuration.

In this case, the first electrode sheet alignment unit 220 may include a first linear moving unit for moving the first electrode sheet alignment stage in the X-axis direction, and a second linear movement for moving the first electrode sheet alignment stage in the Y-axis direction. It may further include a rotation moving unit for rotating the eastern and first electrode sheet alignment stage in the Θ axis direction.

The first electrode sheet image acquisition unit may be configured to acquire a top image of the first electrode sheet 13 seated on the top surface of the first electrode sheet alignment stage.

For example, the first electrode sheet image acquisition unit may include a camera module installed on the first electrode sheet alignment stage by using a light source and an optical system to acquire a 2D image of the first electrode sheet 13, but It is not limited.

The controller may control the horizontal position of the first electrode sheet alignment stage by calculating the horizontal position coordinates of the first electrode sheet 13 based on the first electrode sheet image acquired by the first electrode sheet image acquisition unit. have.

That is, the controller may control the operation of the first linear mover, the second linear mover, and the rotary mover based on the first electrode sheet image acquired by the first electrode sheet image acquirer.

The first electrode sheet alignment unit 220 is not an essential component of the present invention and may be optionally included.

The first electrode sheet transfer part 230 may be configured to transfer the first electrode sheet 13 between the first electrode sheet loading part 210 and the stacking stage 100.

For example, as illustrated in FIG. 1, the first electrode sheet transfer part 230 may absorb and fix the first electrode sheet 13 in the first electrode sheet loading part 210 to fix the first electrode sheet alignment part ( The first transfer tool 232 for transferring to the first electrode sheet alignment stage of 220 and the first electrode sheet 13 in which the horizontal position alignment is completed in the first electrode sheet alignment stage are fixed and adsorbed. It may include a second transfer tool 234 to transfer to the seating position (P).

The first transfer tool 332 and the second transfer tool 334 may include an adsorption unit for adsorbing and fixing the upper surface of the first electrode sheet 13 by vacuum, and the adsorption unit for X, Y, Z, and Θ. It may include a driving unit for moving in any one direction of the axis.

The second electrode sheet supply unit 300 is configured to supply the second electrode sheet 14 to a predetermined mounting position P on the stacking stage 100.

For example, the second electrode sheet supply unit 300 may include a second electrode sheet stacking unit 310 in which a plurality of second electrode sheets 14 are stacked, and a second electrode sheet stacking unit 310 transferred from the second electrode sheet stacking unit 310. Between the second electrode sheet aligning unit 320 and the second electrode sheet stacking unit 310, the second electrode sheet aligning unit 320 and the stacking stage 100 to align the horizontal position of the second electrode sheet 14. In the second electrode sheet 14 may include a second electrode sheet transfer unit 330 for transferring.

The second electrode sheet stacking unit 310 is configured to stack a plurality of second electrode sheets 14 and may include stacking members such as a magazine or a carrier.

The second electrode sheet aligning unit 320 may be configured to align the horizontal position of the second electrode sheet 14 transferred from the second electrode sheet stacking unit 310.

For example, in the second electrode sheet alignment unit 320, the second electrode sheet 14 transferred from the second electrode sheet stacking unit 310 is seated, and moves in one of X and Y axes. Second electrode sheet image acquiring unit (not shown) for acquiring a top image of the second electrode sheet alignment stage (not shown) which is possibly installed and the second electrode sheet 14 seated on the upper surface of the second electrode sheet alignment stage. And a controller (not shown) for controlling a horizontal position of the second electrode sheet alignment stage based on the second electrode sheet image acquired by the second electrode sheet image acquisition unit.

The second electrode sheet alignment stage is mounted with the second electrode sheet 14 transferred from the second electrode sheet stacking part 310 to be movable in any one direction of X, Y and Θ axes. Various configurations are possible with the configuration.

In this case, the second electrode sheet alignment unit 320 may include a first linear moving unit for moving the second electrode sheet alignment stage in the X-axis direction and a second linear movement for moving the second electrode sheet alignment stage in the Y-axis direction. It may further include a rotation moving unit for rotating the eastern and second electrode sheet alignment stage in the Θ axis direction.

The second electrode sheet image acquisition unit may be configured to acquire a top image of the second electrode sheet 14 seated on the top surface of the second electrode sheet alignment stage.

For example, the second electrode sheet image acquisition unit may be configured as a camera module installed on the second electrode sheet alignment stage by a light source and an optical system to acquire a 2D image of the second electrode sheet 13, but It is not limited.

The control unit may control the horizontal position of the second electrode sheet alignment stage by calculating a horizontal position coordinate of the second electrode sheet 14 based on the second electrode sheet image acquired by the second electrode sheet image acquisition unit. have.

The second electrode sheet alignment unit 320 is not an essential component of the present invention and may be optionally included.

The second electrode sheet transfer part 330 is configured to transfer the second electrode sheet 14 between the second electrode sheet loading part 310 and the stacking stage 100.

For example, as illustrated in FIG. 1, the second electrode sheet transfer part 330 may suck and fix the second electrode sheet 14 in the second electrode sheet loading part 310 to form a second electrode sheet alignment part ( The first transfer tool 332 which is transferred to the second electrode sheet alignment stage of 320 and the second electrode sheet 14 whose horizontal position alignment is completed in the second electrode sheet alignment stage are sucked and fixed. It may include a second transfer tool 334 to transfer to the seating position (P).

The first transfer tool 332 and the second transfer tool 334 may include an adsorption part for adsorbing and fixing the upper surface of the second electrode sheet 14 by vacuum, and the adsorption part with X, Y, Z, and Θ. It may include a driving unit for moving in any one direction of the axis.

The separation membrane supply unit 400 is configured to supply the separation membrane 12 to the seating position (P) of the stacking stage 100 is possible in a variety of configurations.

For example, as shown in FIG. 1, the separator supply unit 400 includes a separator loading unit 410 on which a plurality of separators 12 are stacked, and a separator 12 transferred from the separator loading unit 410. It may include a separator aligning unit 420 to align the horizontal position, and a separator transfer unit 430 for transporting and fixing the separator 12 to the seating position (P) of the laminated stage 100.

The separator loading portion 410 has a configuration in which a plurality of separators 12 are stacked, and may include loading members such as a magazine or a carrier.

The separator sorting unit 420 may be configured in various ways to align the horizontal position of the separator 12 transferred from the separator stacking unit 410.

For example, the separator sorting unit 420 may be a sorting separator in which the separator 12 transferred from the separator stacking unit 410 is seated, and is installed to be movable in any one direction of X, Y, and Θ axes. A separator image acquisition unit (not shown) for acquiring a top image of the separator 12 seated on an upper surface of the separator alignment stage, and a separator image obtained from the separator image acquisition unit. It may include a control unit (not shown) for controlling the horizontal position.

The separation membrane sorting stage, the separation membrane 12 transferred from the membrane loading portion 410 is seated, it can be configured in a variety of configurations to be movable in any one direction of the X-axis, Y-axis and Θ axis.

In this case, the separator sorting unit 420 may include a first linear moving unit for moving the separator sorting stage in the X-axis direction, a second linear moving unit for moving the separator sorting stage in the Y-axis direction, and a membrane sorting stage for the Θ-axis direction. It may further include a rotation moving unit for rotating to.

The separator image acquisition unit may be configured in such a manner as to obtain a top image of the separator 12 seated on the separator alignment stage.

For example, the separator image acquisition unit may be configured as a camera module formed of a light source and an optical system installed on the separator alignment stage to obtain a 2D image of the separator 12, but is not limited thereto.

The controller may control the horizontal position of the membrane alignment stage by calculating a horizontal position coordinate of the separator 12 based on the separator image obtained by the separator image acquisition unit.

The separator 420 is not an essential component of the present invention and may be optionally included.

The separator transfer unit 430 may be configured to transfer the separator 12 between the separator loading unit 410 and the stacking stage 100.

For example, as shown in FIG. 1, the separator transfer part 430 may first fix and fix the separator 12 in the separator loading part 410 to transfer to the membrane alignment stage of the membrane alignment part 420. The transfer tool 432 may include a second transfer tool 434 which absorbs and fixes the separation membrane 12 in which the horizontal alignment is completed in the separation membrane alignment stage, and transfers it to the seating position P of the stacked stage 100. .

When the separator supply unit 400 does not include the membrane alignment unit 420, the separator transfer unit 430 may use the separator loading unit 410 through the second transfer tool 434 without the first transfer tool 432. Of course, the separation membrane 12 can be transferred directly from the stacking stage 100 to the stack 100.

The first transfer tool 432 and the second transfer tool 434 may include an adsorption part for adsorbing and fixing the upper surface of the separation membrane 12 by vacuum, and an adsorption part for any of X, Y, Z, and Θ axes. It may include a driving unit for moving in one direction.

On the other hand, the electrode laminating apparatus of the secondary battery cell 20 according to the present invention may include a pair of separator supply unit 400 to improve productivity.

In this case, as shown in FIG. 1, the pair of membrane supply units 400 are installed to face each other with respect to the stacking stage 100, and the separator 12 is placed at a seating position P of the stacking stage 100. Can be supplied sequentially.

The secondary battery cells 20 stacked on the stacking stage 100 may be unloaded from the stacking stage 100 and transferred to the secondary battery cell unloading unit 500.

On the other hand, when the electrode stack of the secondary battery cell 20 is not in close contact between the electrode sheets (13, 14) and the separator 12 is lifted between the electrode sheets (13, 14) and the separator 12 In addition, when the edge sealing of the separator 12 is not performed properly, there is a problem that the productivity of the device is reduced by causing a failure of the secondary battery cell 20.

Accordingly, the present invention improves the structure of the second transfer tool 434 for adsorbing and fixing the separation membrane transfer part 430, in particular, the separation membrane 12 and transporting it to the seating position P of the stacking stage 100. One problem is solved.

Specifically, the separator transfer part 340 of the present invention includes an adsorption part 510 for fixing the upper surface of the separator 12 by vacuum adsorption, and the stacked first electrode sheet 13 and the second electrode sheet ( 14) and the separation membrane 12 may include a separation membrane pressurizing portion 520 for pressing at least a portion of the upper surface of the separation membrane 30 transferred to the seating position (P).

Specifically, as shown in FIG. 3A, the separator pressurizing unit 520 includes a central pressurizing unit 530 for pressing at least a portion of the central portion of the separator 12, and at least a portion of the edge outer edge of the separator 12. It may include an outer pressurizing unit 540 to pressurize.

Here, as shown in FIG. 2, a central portion of the separator 12 is an area overlapping with the

electrode sheets

13 and 14, and an outer portion of the separator 12 overlaps with the

electrode sheets

13 and 14. It may be defined as an area adjacent to the outer edge of the other separation membrane 12 below.

The adsorption part 510 may be formed in at least one of the central pressure part 530 and the outer pressure part 540, but is preferably provided in the central pressure part 530.

The adsorption part 510 is a flow path connecting an adsorption surface between an external vacuum pump (not shown), the membrane pressurizing part 520, and an upper surface of the separation membrane 12 to be vacuum adsorbed through a vacuum pump to form a separation membrane 12. Various configurations are possible with the configuration for fixing the upper surface.

In this case, the central pressurizing part 530 and the outer pressurizing part 540 are preferably coupled to move relative up and down in order to independently perform center pressurization of the separation membrane 12 and pressurization of the outer part of the separation membrane 12. .

At least one of the central pressurizing part 530 and the outer pressurizing part 540 attaches the stacked separator, the first electrode sheet 13, and the second electrode sheet 14 to each other, and the separator 12. The heater unit 550 for heating the separation membrane 12 may be provided.

The heater 550 is preferably installed near the contact surface of the separator 12 of the central pressure unit 530 and the outer pressure unit 540 as a heat generating member.

Depending on the region heated by the heater unit 550, between adjacent separators 12, between the first electrode sheet 13 and the separator 12, or between the second electrode sheet 14 and the separator 12 is heat. By attaching to each other.

When the heater unit 550 is provided in the outer pressurizing unit 540, edges of adjacent separators 12 may be attached to each other to seal the inside of the secondary battery cell 20.

In addition, the contact surface with the separator 12 of the central pressure unit 530 and the outer pressure unit 540 is preferably made of a high thermal conductivity material so that the thermal conductivity can be made smoothly.

The central pressurizing part 530 may be configured to press at least a portion of the central part of the separation membrane 12.

As shown in FIG. 4, the central pressurizing part 530 is preferably formed with convex bends on the adsorption surface in contact with the upper surface of the separation membrane 12 adsorbed by the adsorption part 510.

When the bending is formed on the adsorption surface of the central pressurizing unit 530, the separator 12 is moved downwards in a fixed state of adsorption, thereby stacking the secondary battery cells 20 from the center to the lower side of the separator 12. As it comes in contact with the sieve and gradually closes to the lower laminate as it goes from the center to the outer portion, the separation occurs between the separator 12 and the separator 12 or between the separator 12 and the

electrode sheets

13 and 14. There is an advantage that can be minimized.

At this time, the suction surface of the central pressure unit 530 may be made of a material capable of elastic deformation, but is not limited thereto.

The central pressurizing part 530 may be installed to correspond to the inner central part of the separation membrane 12 in order to press the central part of the separation membrane 12 in the downward direction as illustrated in FIG. 3A.

Likewise, the outer pressurizing part 540 may be installed to correspond to the outer part of the separation membrane 12 in order to press at least a part of the edge outer part of the separation membrane 12 in the downward direction as shown in FIG. 3A. .

Meanwhile, as illustrated in FIG. 2, a plurality of outer pressurizing regions 22 may be set along the outer edge of the separation membrane 12.

In this case, the outer pressurizing unit 540 may include a plurality of outer pressurizing members 542 and a plurality of outer pressurizing members 542 corresponding to the plurality of outer pressurizing regions 22 and installed to be movable. It may include a connection member 544 for connecting.

In this case, the plurality of outer pressurizing members 542 may be coupled to the connecting member 544 so as to be movable independently, or coupled to the connecting member 544 to interlock with each other.

In the electrode stacking method performed in the electrode stacking apparatus of the secondary battery cell 20 having the above-described configuration, the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked, and the first electrode sheet is stacked. As the electrode stacking method of the secondary battery cell 20 in which the separator 12 is positioned between the 13 and second electrode sheets 14, the first electrode sheet 13 is formed by the first electrode sheet 13, the first electrode sheet 13, and the second electrode sheet 14. A first electrode sheet supplying step of supplying a predetermined position to a seating position P on the stacking stage 100 where the two electrode sheets 14 and the separator 14 are stacked; A second electrode sheet supplying step of supplying the second electrode sheet 14 to the seating position P of the stacking stage 100; It may include a separator supply step for supplying the separator 12 to the seating position (P) of the stacking stage (100).

The separator supplying step is a separator transfer step of transporting the separator 12 to the seating position P of the stacking stage 100 by adsorbing and fixing the separator 12, and stacking the first electrode sheet 13 and the second electrode sheet 14. And a membrane pressurizing step of pressurizing at least a portion of the upper surface of the membrane 12 transferred to the seating position P for adhesion between the membranes 12.

For example, the membrane pressing step may include a central pressing step for pressing at least a portion of the inner central portion of the separator 12 transferred to the seating position P, and at least a portion of the outer edge of the separator 12 after the central pressing step. It may include an outer pressing step for pressing the set outer pressing area 22.

On the contrary, as another example, the membrane pressing step may include an outer pressurizing step for pressing the outer pressurizing region 22 set at at least a portion of the edge outer portion of the separation membrane 12 transferred to the seating position P, and the outer pressurizing pressure. After the step may include a central addition step of pressing at least a portion of the central portion of the inner layer of the membrane (12).

In addition, the separating membrane pressing step may heat the separation membrane 12 while pressing at least a portion of the upper surface of the separation membrane 12 transferred to the seating position P.

Meanwhile, in the outer pressing step, the outer pressing regions 22 set at the edges may be classified into two types and alternately pressurized.

Specifically, as shown in FIG. 2, when the outer pressing regions 22 are set along the outer edge of the separator 12, the outer pressing step when the separator 12 is stacked on the upper surface of the first electrode sheet 13. Pressurizes the outer pressing area 22 of ① and next, when laminating the next separator 12 on the upper surface of the second electrode sheet 14, the outer pressing step includes the outer outer ② area except the outer pressing area 22 of ①. The pressing areas 22 may be pressed.

Through this, the same outer pressurizing region 22 can be prevented from being continuously pressurized / heated, thereby improving the durability of the secondary battery cell 20.

Hereinafter, referring to FIG. 5, the same configuration as the above-described embodiment of FIGS. 1 to 4 will be omitted by using the same reference numerals, and the secondary battery cell according to another embodiment of the present disclosure will be mainly focused on differences. The electrode laminating apparatus of 20) will be described in detail.

Unlike FIG. 1, the electrode lamination apparatus of FIG. 5 may include a pair of stacked stages 100 and a pair of separator supply units 400 corresponding thereto.

The pair of stacked stages 100 and the pair of membrane supply units 400 may be installed to face each other with respect to the first electrode sheet supply unit 200 and the second electrode sheet supply unit 300.

In this case, an electrode stacked region in which the first electrode sheet 13 and the second electrode sheet 14 are supplied and stacked may be set between the first electrode sheet supply unit 200 and the second electrode sheet supply unit 300. .

In this case, the pair of stacked stages 100 may receive a separator from a corresponding separator supply unit 400 and may alternately move to the electrode stacked region.

That is, while the separator 12 is supplied from the separator supply unit 400 corresponding to one of the pair of stacked stages 100, the first electrode sheet supply unit 200 or the second electrode sheet supply unit 300 is supplied to the other one.

Electrode sheets

13 and 14 may be supplied.

Therefore, the stacking of the separator 12 and the

electrode sheets

13 and 14 may be simultaneously performed on the two stacking stages 100, thereby greatly improving the productivity of the apparatus.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

Claims

The secondary battery cell in which the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other, and the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14. (20) The electrode lamination apparatus,

A stacking stage 100 in which the first electrode sheet 13, the second electrode sheet 14, and the separator 14 are stacked;

A first electrode sheet supply unit 200 for supplying a first electrode sheet 13 to a predetermined mounting position P on the stacking stage 100;

A second electrode sheet supply unit 300 for supplying a second electrode sheet 14 to the seating position P of the stacking stage 100;

It includes a separator supply unit 400 for supplying a separator 12 to the seating position (P) of the laminated stage 100,

The separator supply unit 400 includes a separator transfer unit 430 which sucks and fixes the separator 12 and transfers the membrane 12 to the seating position P of the multilayer stage 100.

The separator transfer part 430 includes an adsorption part 510 for fixing the upper surface of the separator 12 by vacuum suction, and the stacked first electrode sheet 13, the second electrode sheet 14, and the separator ( 12) the electrode stack of the secondary battery cell 20, characterized in that it comprises a separator pressurizing portion 520 for pressing at least a portion of the upper surface of the separator 12 transferred to the seating position (P) for close contact therebetween. Device.
The method according to claim 1,

The first electrode sheet supply unit 200,

A first electrode sheet loading part 210 in which a plurality of first electrode sheets 13 are stacked;

A first electrode sheet aligning unit 220 for aligning a horizontal position of the first electrode sheet 13 transferred from the first electrode sheet stacking unit 210;

And a first electrode sheet transfer part 230 for transferring the first electrode sheet 13 between the first electrode sheet loading part 210, the first electrode sheet alignment part 220, and the stacking stage 100. Electrode laminating apparatus of a secondary battery cell (20), characterized in that.
The method according to claim 2,

The first electrode sheet alignment unit 220,

A first electrode sheet alignment stage on which the first electrode sheet 13 transferred from the first electrode sheet loading part 210 is seated, and which is installed to be movable in any one direction of X, Y and Θ axes; ,

A first electrode sheet image acquisition unit for acquiring a top image of the first electrode sheet 13 seated on an upper surface of the first electrode sheet alignment stage;

And a control unit for controlling a horizontal position of the first electrode sheet alignment stage based on the first electrode sheet image acquired by the first electrode sheet image acquisition unit. Device.
The method according to claim 1,

The second electrode sheet supply unit 300,

A second electrode sheet loading part 310 in which a plurality of second electrode sheets 14 are stacked;

A second electrode sheet aligning unit 320 for aligning a horizontal position of the second electrode sheet 14 transferred from the second electrode sheet stacking unit 310;

And a second electrode sheet transfer part 330 for transferring the second electrode sheet 14 between the second electrode sheet loading part 310, the second electrode sheet alignment part 320, and the stacking stage 100. Electrode laminating apparatus of a secondary battery cell (20), characterized in that.
The method according to claim 4,

The second electrode sheet alignment unit 320,

A second electrode sheet alignment stage on which the second electrode sheet 14 transferred from the second electrode sheet loading part 310 is seated, and which is installed to be movable in any one direction of X, Y and Θ axes; ,

A second electrode sheet image acquisition unit for acquiring a top image of the second electrode sheet 14 seated on an upper surface of the second electrode sheet alignment stage;

And a control unit for controlling a horizontal position of the second electrode sheet alignment stage based on the second electrode sheet image acquired by the second electrode sheet image acquisition unit. Device.
The method according to claim 1,

The separator supply unit 400,

A membrane loading part 410 on which a plurality of separators 12 are stacked;

It includes a separator aligning portion 420 for aligning the horizontal position of the separator 12 transferred from the separator loading portion 410,

The membrane transfer unit 430,

In order to transfer the separator 12 from the separator aligning unit 420 to the seating position P of the laminated stage 100, the separator 420 is movably installed between the separator aligning unit 420 and the laminated stage 100. Electrode laminating apparatus of a secondary battery cell (20), characterized in that.
The method according to claim 1,

The electrode laminating apparatus includes a pair of membrane supply units 400,

The pair of membrane supply units 400 are installed to face each other with respect to the stacking stage 100, and sequentially supply the separators 12 to a seating position P of the stacking stage 100. Electrode laminating apparatus of a secondary battery cell (20).
The method according to claim 1,

The electrode 10 is disposed in the center portion of the outer edge of the separation membrane 12,

The separator pressurizing unit 520 may include a central pressurizing unit 530 for pressing at least a portion of the central portion of the separator 12 and an outer pressurizing unit 540 for pressing at least a portion of the outer edge of the separator 12. Including;

The center pressurizing unit 530 and the outer pressurizing unit 540 are electrode laminating apparatus of the secondary battery cell 20, characterized in that coupled to move relative up and down.
The method according to claim 8,

The adsorption unit (510), the electrode laminated device of the secondary battery cell 20, characterized in that formed in the central pressure unit (530).
The method according to claim 9,

The central pressure unit 530,

The electrode stacking device of the secondary battery cell 20, characterized in that the convex curve is formed on the adsorption surface in contact with the upper surface of the adsorption separator 12.
The method according to claim 8,

A plurality of outer pressurizing regions 22 are set along the outer edge of the separator 12,

The outer pressurizing unit 540 includes a plurality of outer pressurizing members 542 corresponding to the plurality of outer pressurizing regions 22 and installed to be movable. Electrode lamination apparatus.
The method according to claim 11,

The plurality of outer pressurizing members (542), the electrode laminated device of the secondary battery cell (20), characterized in that it is moved independently.
The method according to claim 9,

At least one of the central pressing unit 530 and the outer pressing unit 540,

In order to attach the stacked separator, the first electrode sheet 13 and the second electrode sheet 14 to each other, it characterized in that it comprises a heater unit 550 for heating the separator 12 while pressing the separator 12 Electrode laminating apparatus of the secondary battery cell (20).
The secondary battery cell in which the first electrode sheet 13 and the second electrode sheet 14 are alternately stacked with each other, and the separator 12 is positioned between the first electrode sheet 13 and the second electrode sheet 14. As the electrode lamination method of (20),

The first electrode sheet 13 is supplied to a predetermined mounting position P on the stacking stage 100 where the first electrode sheet 13, the second electrode sheet 14, and the separator 14 are stacked. 1 electrode sheet supplying step; Supplying a second electrode sheet (14) to the seating position (P) of the stacking stage (100); A separator supplying step of supplying a separator 12 to the seating position P of the stacked stage 100,

Separator supply step,

A membrane transport step of transporting and fixing the separator 12 to the seating position P of the laminated stage 100;

Separator pressure for pressing at least a portion of the upper surface of the separator 12 transferred to the seating position (P) for adhesion between the stacked first electrode sheet 13, the second electrode sheet 14, and the separator 12. Electrode lamination method of a secondary battery cell 20, characterized in that it comprises a step.