KR20210128593A - Manufacturing method of electrode assembly for secondary batteries - Google Patents

Abstract

The present invention relates to a method for manufacturing an electrode assembly for a secondary battery, and more specifically, to a method for manufacturing an electrode assembly for a secondary battery, which can simplify a process and significantly shorten manufacturing time through a method of winding the electrode assembly in which a separator is disposed between a negative electrode plate and a positive electrode plate of the secondary battery.

Description

Manufacturing method of electrode assembly for secondary batteries

The present invention relates to a manufacturing method of an electrode assembly for a secondary battery, and more particularly, by winding an electrode assembly in which a separator is disposed between a negative electrode plate and a positive electrode plate of a secondary battery, simplifying the process, and significantly reducing the manufacturing time It relates to a manufacturing method of an electrode assembly for a secondary battery that can be

In general, secondary batteries include a plurality of negative electrodes coated with a negative active material and a plurality of positive electrodes coated with a positive active material. Thereafter, an electrode assembly in which the plurality of negative electrodes and the plurality of positive electrodes are laminated with a separator interposed therebetween is manufactured. After that, the electrode assembly is embedded in an aluminum pouch and sealed, and the aluminum pouch in which the electrode assembly is embedded is embedded in a case, etc.

For such secondary batteries, power sources such as portable telephones, television cameras, notebook computers, and batteries for electric vehicles (eg, hybrid vehicles) are required to be compact, lightweight, large-capacity, and high-voltage power sources. As such a power source, for example, a secondary battery such as a lithium ion polymer battery or a lithium battery is used.

At this time, there are various methods of manufacturing the internal cell stack of the secondary battery, among which the separator forms a zigzag folded form by Z-stacking (also called Z-stacking, Z-folding, zigzagfolding, or accordion folding). The negative and positive plates are alternately stacked in an inserted form.

As such a prior art, a "lithium secondary battery" has been proposed.

The prior art is a single separator; A plurality of positive electrode plates bonded to one side of the separator to have a predetermined distance from each other and cut to a predetermined size; and a plurality of negative electrode plates attached to the other side of the separator at positions corresponding to the positive electrode plates and cut to a predetermined size; The separator is successively folded in a zigzag form so that the positive and negative plates can be alternately stacked with each other.

However, in the prior art, although good results can be obtained with respect to the alignment state, since the stacking is performed one by one, the time taken to complete one cell stack is very long, and accordingly, there is a problem in that productivity is significantly reduced.

In addition, if the moving speed is increased in order to shorten the time, the separator is torn or does not unfold taut, so there is a problem in that the quality is deteriorated due to meandering due to wrinkles.

Lastly, the Z-folding method, which is folded in a zigzag manner, because the separator is made of a thin layer and cannot be moved faster than a certain speed, takes time to move for lamination, and is structurally limited in shortening the lamination time. There is this.

Korean Patent Registration No. 10-0309604 (Oct. 10, 2001)

The present invention has been devised to solve the above problems, and an object of the present invention is a method of manufacturing an electrode assembly for a secondary battery that can significantly shorten the overall process time through a method of winding a cell-stack of a secondary battery is to provide

Another object of the present invention is to have a simple process by eliminating unnecessary processes because cells can be easily arranged so that the cell-stack can be wound and manufactured, and the cell-stack can be manufactured through sequential progress. An object of the present invention is to provide a method for manufacturing an electrode assembly for a secondary battery.

Another object of the present invention is that the separation membrane and the cell are fused through thermal fusion to prevent damage to the cell-stack, shortening the fusion time, so that the process can be performed quickly, and the cell is separated from the separation membrane during movement An object of the present invention is to provide a method for manufacturing an electrode assembly for a secondary battery, which can prevent it.

Another object of the present invention is to cut the positive and negative plates into cells according to the cell-stack specifications, and notching the electrodes formed in the cells to be positioned in various directions to connect the electrodes to the cell-stack in various directions. Electrodes for secondary batteries An object of the present invention is to provide a method for manufacturing an assembly.

Another object of the present invention is to provide a method for manufacturing an electrode assembly for a secondary battery, wherein the manufactured cell-stack is inspected to determine a defective state, and the defective-determined cell-stack is separated and discharged to improve the completeness.

The present invention for achieving the object as described above is a batch process of forming a cell-module by crossing the anode cell and the cathode cell by placing them on a separator; It characterized in that it consists of a winding process of winding the cell-module formed in the arrangement process to manufacture the cell-module in which the cathode cell and the cathode cell are stacked.

In the disposing step, the cell-module arranges either the positive electrode cell or the negative electrode cell at the starting point of the separator, and crosses them so as to have an electrode opposite to the arranged cell to continuously the negative cell and the positive electrode. It is made of an intersection point for arranging cells, and the intersection point is preferably arranged such that two pairs of the positive electrode cell and the negative electrode cell of the same electrode are arranged.

The cell-module formed in the disposing step is wound in the winding process and gradually increases the cell-stack thickness to adjust the spacing between the positive electrode cell and the negative electrode cell, and one end of the separator is the positive electrode cell And it is preferable that a protruding inner blank is formed so as to cover the negative electrode cell, and the other end is formed with an external margin for winding the wound positive electrode cell and negative electrode cell.

The positive electrode cell and the negative electrode cell include a processing step of cutting and notching the wound positive electrode plate and the negative electrode plate to move to the batch process, the processing step is a supply step of supplying the wound positive electrode plate and the negative electrode plate, respectively; A cutting step of manufacturing the positive electrode cell and the negative electrode cell by notching so that the electrodes protrude from the ends of the supplied positive electrode plate and the negative electrode plate and cutting according to the interval, and each of the positive electrode cell and the negative electrode manufactured in the cutting step It is preferred that the cell is moved to the separation membrane.

It is preferable that the electrodes are alternately formed so as to protrude from the left side and the right side from the ends of the plurality of positive and negative electrode cells.

It is preferable that the electrode is formed at either one end or the other end of the positive electrode cell, and the negative electrode cell is formed at the opposite end of the positive electrode cell.

The cell-module manufactured in the batch process includes a lamination process in which the anode cell and the cathode cell are attached to the separator through pressurization and thermal fusion to move to the winding process, the lamination process, the cell- A film introduction step of supplying the coating film to the upper and lower ends of the module, and a cell-module on which the coating film is disposed in the film introduction step is pressed to adhere the coating film, the positive electrode cell and the negative electrode cell to the separator In the pressing step, the cell-module to which the coating film is pressed in the pressing step is heated to heat-seal the positive electrode cell and the negative electrode cell to the separator, and in the welding step, the cell-module is attached. It is preferable to consist of a removal step of removing the coated film.

Preferably, a cutting process of cutting the cell-module formed in the arrangement process to the length and moving to the winding process is included.

Preferably, a tapping process of closing the end by tapping the separator wound on the outer surface of the cell-stack manufactured in the winding process is included.

An inspection process of inspecting the cell-module and the cell-stack is included, wherein the inspection process is a vision inspection step of removing defects by detecting the shape and arrangement state of the anode cell and the cathode cell disposed on the separator. and, it is preferable that the cell-stack comprises a withstand voltage test step of supplying power to measure the withstand voltage to eliminate defects.

It is preferable that a control unit for controlling the batch process for manufacturing the cell-stack and the winding process to operate organically is included.

According to the manufacturing method of the electrode assembly for a secondary battery according to the present invention, there is an effect that the entire process time can be significantly shortened through the method of winding the cell-stack of the secondary battery.

According to the present invention, there is an advantage in that the cell-stack can be quickly manufactured by arranging the cell so that it can be manufactured by winding the cell-stack, removing unnecessary processes, and sequentially performing a simple process.

According to the present invention, it is possible to prevent damage to the cell-stack and shorten the fusion time by fixing it through thermal fusion, thereby reducing the time generated in one process and preventing the cell from being separated from the separator. there are advantages to

According to the present invention, there is an advantage that the cell-stack manufactured by forming electrodes in various directions while cutting the positive and negative plates according to the cell-stack specifications can connect the electrodes in various directions.

According to the present invention, it is an object of the present invention to provide a method for manufacturing an electrode assembly for a secondary battery, which inspects the manufactured cell-stack to determine a defective state, and improves the completeness by separating and discharging the defective-determined cell-stack.

1 is a block diagram showing a manufacturing method of an electrode assembly for a secondary battery according to the present invention;
2 is a schematic view showing a manufacturing method of the electrode assembly for a secondary battery according to the present invention;
3 is a cross-sectional view showing a cell-stack according to the present invention;
Figure 4 is a conceptual diagram showing the processing and arrangement of the anode cell and the cathode cell according to the present invention;
5 is a conceptual diagram showing the electrode arrangement of the cathode cell and the anode cell according to the present invention;
6 is a conceptual diagram illustrating a control state of a control unit according to the present invention.

Hereinafter, a method for manufacturing an electrode assembly for a secondary battery according to the present invention will be described in detail together with the accompanying drawings.

1 is a block diagram illustrating a manufacturing method of an electrode assembly for a secondary battery according to the present invention, FIG. 2 is a schematic diagram showing a manufacturing method of an electrode assembly for a secondary battery according to the present invention, and FIG. 3 is a cell- according to the present invention It is a cross-sectional view showing a stack, and FIG. 4 is a conceptual diagram illustrating processing and arrangement of a positive electrode cell and a negative electrode cell according to the present invention, and FIG. 5 is a conceptual diagram illustrating an electrode arrangement of a negative electrode cell and a positive electrode cell according to the present invention, 6 is a conceptual diagram illustrating a control state of a control unit according to the present invention.

1 to 6, the present invention relates to a method for manufacturing an electrode assembly for a secondary battery, and more particularly, a separator in which a separator is disposed between a bicell of a negative plate and a positive plate of a secondary battery. An object of the present invention is to provide a method for manufacturing an electrode assembly for a secondary battery.

To this end, the present invention consists of a batch process (S10) and a winding process (S20) so that a positive electrode plate and a negative electrode plate are disposed crosswise on a separator and then wound up using a rolling method to be stacked quickly.

In the arrangement process ( S10 ), the anode cell 11 and the cathode cell 12 are crossed and disposed on the separator 13 to form the cell-module 10 .

In the winding process (S20), the cell-module 10 formed in the arrangement process (S10) is wound to manufacture the cell-module 10 in which the cathode cell 12 and the anode cell 11 are stacked.

Accordingly, the positive electrode cell 11 and the negative electrode cell 12, which are alternately seated on the upper end of the separator 13 in the arrangement step S10, are wound through the winding step S20.

Through this, the cell-stack 20 can be quickly manufactured by winding it up by a rolling method.

For this purpose, each process is described in detail as follows.

First, in the arrangement step ( S10 ), the cell-module 10 is formed by disposing the anode cell 11 and the cathode cell 12 on the upper surface of the separator 13 .

At this time, the cell-module 10 arranges either the positive electrode cell 11 or the negative electrode cell 12 at the starting point 18 of the separator 13, and an electrode ( 14) by crossing to have the anode cell 12 and the anode cell 11 successively arranged at an intersection point 19, wherein the intersection point 19 is the anode of the same electrode 14 The cell 11 and the cathode cell 12 are arranged in pairs.

Accordingly, two electrodes 14 opposite to each other are sequentially arranged in accordance with the electrode 14 of the cell disposed at the beginning of the separator 13, and two opposite electrodes 14 are arranged to form an intersecting pattern.

That is, as shown in FIG. 4 , the positive electrode cell 11 and the negative electrode cell 12 are alternately arranged.

Through this, when the cell-module 10 is wound through the winding process (S20), the positive electrode plate 15 and the negative electrode plate 16 can be positioned to cross each other.

And the cell-module 10 formed in the arranging step is wound in the winding process (S20) and gradually increased in the cell-stack 20 according to the thickness T of the anode cell 11 and the cathode cell. Adjust the spacing (DS) of (12).

Therefore, when the cell-stack 20 shown in FIG. 3 is manufactured, the positive electrode cell 11 and the negative electrode cell 12 are continuously arranged according to the thickness T that gradually thickens while the cell-module 10 is wound. ) is gradually widened so that it can be wound smoothly.

In addition, one end of the separator 13 has an inner blank 13a protruding so as to cover the positive electrode cell 11 and the negative electrode cell 12, and the other end of the positive electrode cell 11 is wound. and an outer margin 13b for winding the cathode cell 12 is formed.

That is, the inner blank 13a is the positive cell 11 or the negative cell 12 disposed at the starting point 18 of the separator 13 is directly contacted by the cell wound by covering the upper surface. When the winding of the cell-module 10 is completed, the outer blank 13b is finished by winding the separator 13 in which the cell is not disposed.

Here, the cathode cell 12 or the anode cell 11 and the inner blank 13a disposed at the starting point 18 of the separator 13 may be disposed by changing positions.

Through this, when the cell-module 10 is wound, it is wound in various directions, so that the cell-stack 20 can be manufactured.

Next, in the winding process (S20), the cell-module 10 being introduced is wound based on the starting point 18 to be laminated.

Therefore, in the winding process (S20), the cell-module 10 is wound so as to have a roll shape based on the positive cell 11 or the negative cell 12 located at the starting point 18 .

At this time, in the case of winding, the cell located at the starting point 18 covers one surface of the inner blank 13a and the separation membrane 13 is in contact with both surfaces.

And the winding process (S20) is rotated in a clockwise or counterclockwise direction based on the starting point 18, and the separator 13 is disposed between the positive electrode cell 11 and the negative electrode cell 12. Lamination takes place quickly.

Through this, the cell-stack 20 can be manufactured quickly according to the adjustment of the winding speed without a large strain on the separator 13 .

In addition, when the cell-module 10 is initially wound, the separator 13 is conveniently disposed between the positive electrode cell 11 and the negative electrode cell 12 through the inner blank 13a when a separate process is performed. By omitting the process, the processing time can be shortened because the process can proceed quickly.

Next, a processing step (S30) of processing the anode cell 11 and the cathode cell 12 seated on the separator 13 in the arrangement step (S10) will be described.

This processing step (S30) is arranged before the arrangement step (S10) so that the positive electrode cell 11 and the negative electrode cell 12 are cut and notched by cutting and notching the wound positive electrode plate 15 and the negative electrode plate 16. It moves to a batch process (S10).

Therefore, the arrangement process (S10) consists of a supply step (S31), a cutting step (S32), and a moving step (S33) so that the anode cell 11 and the cathode cell 12 can be processed.

At this time, the arrangement process (S10) is equipped with two equipment in accordance with the anode cell 11 and the cathode cell 12, respectively, and the same supply step (S31), cutting step (S32) and moving step (S33) processing is done through

In the supplying step ( S31 ), the wound positive electrode plate 15 and the negative electrode plate 16 are respectively supplied.

That is, in the supply step (S31), the positive electrode plate 15 and the negative electrode plate 16 are individually supplied in a wound state.

The cutting step (S32) is notched so that the electrode 14 protrudes from the ends of the supplied positive electrode plate 15 and the negative electrode plate 16 and cut according to the gap to the positive electrode cell 11 and the negative electrode cell 12 are prepared respectively.

That is, in the cutting step (S32), the side surfaces of the wound positive electrode plate 15 and the negative electrode plate 16 are notched so that the electrode 14 is protruded, and the wound positive electrode plate 15 and the negative electrode plate 16 are lengthened. By cutting along the direction, processing is made according to the size of the positive electrode cell 11 and the negative electrode cell 12 .

In addition, notching and cutting can be processed at the same time.

In addition, the electrodes 14 processed on the positive electrode plate 15 and the negative electrode plate 16 are made in various ways so that electric power can flow according to the use when the cell-stack 20 is manufactured.

Accordingly, as an example in which the electrode 14 is formed, a plurality of the anode cells 11 and the cathode cells 12 are alternately formed so as to protrude from the left and the right from the ends.

The electrode 14 is processed to protrude alternately on the left and right sides of one surface of the positive electrode cell 11 sequentially in a state in which the positive electrode plate 15 to be drawn out is cut.

In addition, the negative electrode plate 16 is made in the same manner as the positive electrode plate 15 .

Therefore, the anode cell 11 and the cathode cell 12 are supplied to be seated on the separator 13 by crossing the electrodes 14 formed at the ends alternately on the left and right sides.

Through this, the cell-stack 20 is configured to allow electricity to flow from one surface through the positive and negative electrodes 14 formed at the ends of one surface.

And as an example in which the electrode 14 is formed, the electrode 14 is formed at either one end or the other end of the positive electrode cell 11 , and the negative electrode cell 12 is the positive electrode cell 11 . ) is formed at the opposite end of

Accordingly, an electrode 14 is formed on either side of both sides of the positive electrode plate 15 that is drawn out through notching, and an electrode 14 is formed on the negative electrode plate 16 that is drawn out through notching on the opposite side of the positive electrode plate 15 . do.

Through this, the cell-stack 20 is configured such that the power of the anode flows from one end of the one side and the power of the cathode flows from the end of the other side so that power flows from both sides.

In the moving step (S33), each of the anode cell 11 and the cathode cell 12 manufactured in the cutting step (S32) is moved to the separator 13 .

Therefore, the moving step (S33) is made such that the anode cell 11 and the cathode cell 12 manufactured in the cutting step are respectively moved to cross the separator 13 and disposed.

Through this, the processing device processes the anode cell 11 and the cathode cell 12 seated on the cell-module 10 and supplies them quickly.

And the cell-module 10 manufactured in the arrangement process (S10) attaches the positive electrode cell 11 and the negative electrode cell 12 to the separator 13 through pressurization and thermal fusion, so that the winding process ( A lamination process (S40) moving to S20) is included.

Therefore, in the lamination process (S40), the positive electrode cell 11 and the negative electrode cell 12 seated on the separator 13 are fixed through pressure and fusion.

To this end, the lamination process (S40) consists of a film introduction step (S41), a pressing step (S42), a fusion step (S43) and a removal step (S44).

The film introduction step (S41) supplies the coating film 17 to the top and bottom of the cell-module 10.

Accordingly, the coating film 17 is disposed in a wound state on the upper and lower ends of the separator 13 , and is supplied to the introduced separator 13 .

Through this, the cell-module 10 is protected by the coating film 17 to prevent the cell-module 10 from being damaged in the pressing step (S42) and the fusion step (S43) to be described later.

In the pressing step (S42), the coating film 17, the positive electrode cell 11 and the negative electrode cell are pressed by pressing the cell-module 10 on which the coating film 17 is disposed in the film introducing step (S41). (12) is attached to the separation membrane (13).

Here, in the pressing step (S42), the positive electrode cell 11 and the negative electrode cell 12 are applied to the separation membrane 13 by pressing the film attached to the upper and lower ends of the separator 13 in the film introducing step (S41). make it tight

Through this, the air bubbles between the separator 13 and the positive electrode cell 11 and the negative electrode cell 12 are discharged and fixed at the arranged position.

The fusion step (S43) is performed by heating the cell-module 10 to which the coating film 17 is pressed in the pressing step (S42) to separate the positive electrode cell 11 and the negative electrode cell 12 with the separator ( 13) is heat-sealed.

Therefore, in the fusion step (S43), the anode cell 11 and the cathode cell 12 are heated by heating while the coating film 17 is attached, and then heat-sealed through pressure.

The removing step (S44) removes the coating film 17 attached to the cell-module 10 in the fusion step (S43).

Through this, when the positive electrode cell 11 and the negative electrode cell 12 are fused to the separator 13 in the fusion step (S43) by the coating film 17 coated on the cell-module 10, It is protected from damage and can be fused safely.

In addition, the positive electrode cell 11 and the negative electrode cell 12 are fixed to the separator 13 by thermal fusion, and the positive electrode cell 11 and the negative electrode are moved to the winding step S20 and wound up. The cell 12 is prevented from being separated from the separation membrane 13 from being placed in the proper position, and it is possible to easily wind the cell 12 .

And a cutting process (S50) of cutting the cell-module 10 formed in the arrangement process (S10) to fit the length and moving to the winding process (S20) is included.

Therefore, one cell-stack 20 is cut according to the standard and size by the cutting process S50, and the cell-module 10 is cut so that the cell-module 10 can move in the winding process S20.

At this time, the cutting process (S50) is made to have the inner blank (13a) and the outer blank (13b) of the separation membrane (13).

And a tapping process (S60) of closing the end by tapping the separator (13) wound on the outer surface of the cell-stack (20) manufactured in the winding process (S20) is included.

That is, in the tapping process ( S60 ), the cell-module 10 is wound and manufactured by taping the end of the outer blank 13b surrounding the outside of the cell-stack 20 to finish.

After the cell-stack 20 is wound through the tapping process ( S60 ), the separation membrane 13 is prevented from being unwound.

And an inspection step (S70) of inspecting the cell-module 10 and the cell-stack 20 is included.

The inspection process (S70) consists of a vision inspection step (S71) and a withstand voltage inspection step (S72).

In the vision inspection step (S71), defects are removed by detecting the shape and arrangement of the anode cell 11 and the cathode cell 12 disposed on the separator 13 .

Therefore, in the vision inspection step (S71), the cell-module 10 introduced into the winding process (S20) is inspected, and then the cell-module 10 determined to be defective is processed before the winding process (S20). The cell-module 10 or the cell-stack 20 that has undergone the winding process (S20) is separated and discharged.

At this time, the shape, arrangement, damage, etc. of the positive electrode cell 11, the negative electrode cell 12 and the positive electrode cell 11 are inspected through a vision inspection to determine a defect and then discharged separately.

Here, the cell-module 10 can be discharged immediately after inspecting the cell-module 10 cut in the cutting step in the process, or after manufacturing the cell-stack 20 through the winding process (S20). one.

It is installed in a position where it can be discharged smoothly according to the space and installation cost of the device installed in accordance with each process.

In the withstand voltage test step S72, the cell-stack 20 is supplied with power to measure the withstand voltage to remove defects.

Therefore, power is supplied to the electrodes 14 of the cell-stack Å stack completed through the winding process ( S20 ) and the tapping process ( S60 ), and after checking for defects and abnormalities, separate discharge is possible.

Through this, the cell-stack 20 detects a defect by each process, inspects the performance of the manufactured cell-stack 20 to determine a defective state, and then removes the defective cell-stack 20 . Separate discharge is possible.

Accordingly, by detecting defects in the cell-module 10 and the cell-stack 20 , the stability and reliability of the cell-stack 20 can be improved.

In addition, a control unit 30 for controlling the batch process ( S10 ) and the winding process ( S20 ) of manufacturing the cell-stack 20 to be organically operated is included.

The control unit 30 controls the cell-stack 20 manufactured through the arrangement process S10 and the winding process S20 to move smoothly.

Accordingly, the control unit 30 controls the processing step (S30), the lamination process (S40), the cutting process (S50), the tapping process (S60) and It is possible to control the inspection process (S70) as a whole.

In the processing step (S30), the negative electrode cell 12 and the positive electrode cell 11 are controlled and processed so as to be processed according to the shape through the control unit 30, and the processing speed is adjusted in the arrangement step (S10). The anode cell 11 and the cathode cell 12 are crossed to adjust the arrangement speed on the separator 13 and the distance between the anode cell 11 and the cathode cell 12, and the lamination process (S40) ), the speed at which the coating film 17 is introduced, the rotation speed of the pressure roller, and the heat fusion time are controlled, and the cell-module 10 can be cut according to the set length in the cutting process (S50). and control the speed at which the cell-module 10 is wound in the winding process (S20), and control the speed at which the cell-module 10 is finished in the tapping process (S60) to operate organically. made to be possible

Through this, a plurality of processes can be organically operated to quickly manufacture the cell-stack 20 .

Next, the operating state of each process of manufacturing the cell-stack 20 according to the present invention will be described.

The processing process (S30), the arrangement process (S10), the lamination process (S40), the cutting process (S50), the winding process (S20), and the inspection process (S70) are sequentially arranged so that the control unit 30 ) is controlled by

Therefore, in the processing step (S30), the positive electrode plate 15 and the negative electrode plate 16 are processed to process the positive electrode cell 11 and the negative electrode cell 12, and the processed positive electrode cell 11 and the negative electrode The cell 12 moves to the arrangement step (S10).

And in the disposing process (S10), the anode cell 11 and the cathode cell 12 are alternately disposed on the incoming separator 13 .

At this time, the arrangement process (S10) is an example of the arrangement of the positive electrode cell 11 and the negative electrode cell 12 as described above, and the + electrode is arranged at the beginning and -, -, +, +, -, The arrangement is made in an alternating pattern of -, +, + poles.

Here, if the -pole is placed first at the beginning, the pattern is formed in which the +pole is placed next.

In addition, the arrangement process (S10), the cell-arranged according to the number of cells to be stacked in the stack (20), when cutting through the cutting process (S50), the inner margin (13a) and the outside of the separation membrane (13) It is made to have a sufficient space to have a blank space (13b).

In addition, the arrangement is made by controlling the spacing DS of the anode cell 11 and the cathode cell 12 to gradually widen depending on the thickness T when the cell-stack 20 is stacked.

This is controlled by the control unit 30, and after calculating the thickness (T) of the anode cell (11) and the cathode cell (12) and the thickness (T) of the separator 13, the number of layers to be stacked Adjust the spacing (DS) accordingly.

Through this, the arrangement process (S10) is a cell-module in which the anode cell 11 and the cathode cell 12 are disposed on the separator 13 such that the electrodes 14 cross when the cell-stack 20 is wound. (10) is formed.

As such, when the cell-module 10 is disposed in the arrangement step S10, the separator 13, the anode cell 11, and the cathode cell 12 are fused through the lamination step S40. Fix it.

At this time, in the lamination process (S40), the coating film 17 is disposed to prevent the cell-module 10 from being damaged during thermal fusion.

And the cell-module 10 heat-sealed in the lamination process (S40) is cut to a length set through the cutting process (S50).

At this time, the cutting process (S50) is made in consideration of the inner blank (13a) and the outer blank (13b) at both ends of the separation membrane (13).

The cell-module 10 cut in this way is wound through the winding process (S20) to manufacture the cell-stack 20, and the separation membrane 13 is separated by taping through the tapping process (S60). to prevent

In this way, after the anode cell 11 and the cathode cell 12 are manufactured through each process, the cell-stack 20 disposed between the separators 13 can be quickly manufactured.

In addition, the cell-module 10 and the cell-stack 20 detect defects through the inspection process S70, and the cell-stack 20 determined to be defective can be separated and discharged.

Through this, the marketability and reliability of the cell-stack 20 can be improved.

As described above, the rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those of ordinary skill in the art may make various modifications and adaptations within the scope of the claims. It is self-evident that you can

10: cell-module 11: positive cell 12: negative cell
13: separator 13a: inner blank
13b: outer margin 14: electrode
15: positive plate 16: negative plate
17: coating film 18: starting point
19: intersection
20: cell-module
30: control unit
T: thickness
DS: distance

Claims (11)

an arrangement process (S10) of crossing the anode cell 11 and the cathode cell 12 and arranging them on the separator 13 to form the cell-module 10;
A winding process (S20) of winding the cell-module 10 formed in the arrangement process (S10) to manufacture the cell-module 10 in which the negative electrode cell 12 and the positive electrode cell 11 are stacked (S20); A method of manufacturing an electrode assembly for a secondary battery, characterized in that. 2. The method of claim 1
In the arrangement step,
The cell-module 10 arranges either the anode cell 11 or the cathode cell 12 at the starting point 18 of the separator 13, and an electrode 14 opposite to the disposed cell. It consists of an intersection point 19 for continuously arranging the cathode cell 12 and the anode cell 11 by crossing them so as to have a
The crossing point 19 is a method of manufacturing an electrode assembly for a secondary battery, characterized in that the anode cell 11 and the cathode cell 12 of the same electrode 14 are arranged as a pair. 2. The method of claim 1
The cell-module 10 formed in the arranging step is wound in the winding process (S20) and gradually increased in the cell-stack 20 according to the thickness (T) of the anode cell 11 and the cathode cell ( 12) to adjust the spacing (DS),
One end of the separator 13 has an inner blank 13a protruding so as to cover the positive electrode cell 11 and the negative electrode cell 12, and the other end has the wound positive electrode cell 11 and the negative electrode. A method of manufacturing an electrode assembly for a secondary battery, characterized in that an outer blank (13b) capable of winding the cell (12) is formed. 2. The method of claim 1
The positive electrode cell 11 and the negative electrode cell 12 include a processing step (S30) of cutting and notching the wound positive electrode plate 15 and the negative electrode plate 16 to move to the arrangement process (S10),
The processing step (S30) is,
A supply step (S31) of supplying the wound positive electrode plate 15 and the negative electrode plate 16, respectively;
Cutting step ( S32) and
Preparation of an electrode assembly for a secondary battery, characterized in that it comprises a moving step (S33) of moving each of the positive electrode cell 11 and the negative electrode cell 12 prepared in the cutting step (S32) to the separator 13 Method. 5. The method of claim 4,
The electrode (14) is a method of manufacturing an electrode assembly for a secondary battery, characterized in that formed by alternately protruding from the left and right from the ends of the plurality of the positive electrode cells (11) and the negative electrode cell (12). 5. The method of claim 4,
The electrode 14 is formed at either one end or the other end of the positive electrode cell 11, and the negative electrode cell 12 is formed at the opposite end of the positive electrode cell 11. Manufacturing method of electrode assembly for secondary battery. The method of claim 1,
The cell-module 10 manufactured in the arrangement process (S10) attaches the positive electrode cell 11 and the negative electrode cell 12 to the separator 13 through pressure and thermal fusion, and the winding process (S20). ) is included in the lamination process (S40) moving to,
The lamination process (S40) is,
A film introduction step (S41) of supplying the coating film 17 to the top and bottom of the cell-module 10;
In the film introduction step (S41), the cell-module 10 on which the coating film 17 is disposed is pressed to separate the coating film 17, the positive electrode cell 11 and the negative electrode cell 12 from the separator ( 13) and a pressing step (S42) of adhering to the
In the pressing step (S42), the cell-module 10 to which the coating film 17 is pressed is heated to heat-seal the positive electrode cell 11 and the negative electrode cell 12 to the separator 13. step (S43) and
A method of manufacturing an electrode assembly for a secondary battery, characterized in that it comprises a removing step (S44) of removing the coating film (17) attached to the cell-module (10) in the fusion step (S43). The method of claim 1,
A method of manufacturing an electrode assembly for a secondary battery, characterized in that a cutting step (S50) of cutting the cell-module (10) formed in the arrangement step (S10) to fit the length and moving to the winding step (S20) is included. The method of claim 1,
The electrode assembly for a secondary battery, characterized in that it includes a tapping process (S60) of closing the end by tapping the separator (13) wound on the outer surface of the cell-stack (20) manufactured in the winding process (S20) manufacturing method. The method of claim 1,
An inspection process (S70) of inspecting the cell-module 10 and the cell-stack 20 is included,
The inspection process (S70) is,
a vision inspection step (S71) of detecting the shape and arrangement state of the anode cell 11 and the cathode cell 12 disposed on the separator 13 to remove defects;
The method of manufacturing an electrode assembly for a secondary battery, characterized in that it comprises a withstand voltage test step (S72) of supplying power to the cell-stack (20) and measuring the withstand voltage to remove defects. The method of claim 1,
A method of manufacturing an electrode assembly for a secondary battery, characterized in that the control unit 30 for controlling the batch process (S10) and the winding process (S20) of manufacturing the cell-stack (20) to be organically operated is included.

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