KR20200098172A - Die unit, manufacturing method the same and forming apparatus for pouche - Google Patents

Abstract

The present invention relates to a die unit including: a die having a forming groove formed on an upper surface on which a pouch film is disposed; and a diaphragm connected to both walls of the forming groove and dividing the forming groove into two or more, wherein the diaphragm includes a supporting portion for supporting the pouch film located in the forming groove and an unsupporting portion not supporting the pouch film located in the forming groove.

Description

Die unit, its manufacturing method, and pouch forming apparatus {DIE UNIT, MANUFACTURING METHOD THE SAME AND FORMING APPARATUS FOR POUCHE}

The present invention relates to a die unit, a manufacturing method thereof, and a pouch forming apparatus, and in particular, to a die unit preventing damage to a diaphragm provided in a forming groove of a die, a manufacturing method thereof, and a pouch forming apparatus.

In general, a secondary battery refers to a battery capable of charging and discharging unlike a primary battery that cannot be charged, and such a secondary battery is widely used in the field of advanced electronic devices such as phones, notebook computers, and camcorders.

Such a secondary battery includes an electrode assembly having a structure in which electrodes and separators are alternately stacked, and a pouch for accommodating the electrode assembly, and the pouch is sealed so that the electrode assembly accommodating portion and the electrode assembly accommodating portion are sealed. It includes a simmering part.

On the other hand, the pouch is manufactured using a pouch forming apparatus, and the pouch forming apparatus is inserted into the forming groove while pressing the die unit in which the pouch film is disposed and the forming groove is formed, and the pouch film disposed on the die unit is pressed. It includes a pressing unit for molding the electrode assembly receiving portion. Here, a partition plate is provided in the forming groove, and the partition plate divides the forming groove into two. In addition, the pressing unit is formed with a pair of pressing portions respectively inserted into the forming grooves divided based on the diaphragm.

A method of using the pouch forming apparatus having such a structure will be described as follows.

First, a pouch film is placed on the die unit, and then a pair of pressing units included in the pressing unit presses the surface of the pouch film disposed on the die unit. Then, a pair of pressing portions are inserted into the forming grooves of the die unit while pressing the pouch film, thereby forming a pair of electrode assembly accommodating portions having the forming groove shape on the surface of the pouch film.

However, in the pouch forming apparatus, pressure is also applied to the central portion of the pouch film located between a pair of pressing portions, and the pressing force applied to the central portion of the pouch film transmits the diaphragm as it is, and the diaphragm is damaged or deformed. there was.

In particular, the diaphragm can be separated into an end connected to the forming groove and a connecting portion provided between the ends, and the connecting portion has a problem of being easily damaged because the strength is weaker than the end.

Domestic Patent Publication No. 10-2017-0103192

The present invention is invented to solve the above problems, the present invention is to improve the diaphragm provided in the forming groove of the die unit, and accordingly, the die unit capable of preventing the diaphragm from being damaged or deformed, It is an object of the present invention to provide a manufacturing method and a pouch forming apparatus.

The die unit of the present invention for achieving the above object includes: a die having a forming groove formed on an upper surface on which a pouch film is disposed; And a diaphragm connected to both walls of the forming groove and dividing the forming groove into at least two, wherein the diaphragm includes a support part for supporting the pouch film located in the forming groove, and the diaphragm located in the forming groove It may include an unsupported portion that does not support the pouch film.

The support part may include first and second support surfaces respectively connected to both wall surfaces of the molding groove and provided at the same height as the upper surface of the die to support the pouch film located in the molding groove.

The unsupported portion is provided between the first and second support surfaces, is provided at a height lower than the upper surfaces of the first and second support surfaces when viewed from the upper surface of the die, and is located in the forming groove. An open groove that does not support the pouch film may be formed.

”, “

” 및 “

” 중 어느 하나의 구조로 형성될 수 있다.The open groove is between the first and second support surfaces "

”, “

”And“

It can be formed in any one of ”.

The upper surface of the unsupported part may have a height of 1 to 2 mm lower than the upper surface of the support part when viewed from the upper surface of the die.

The unsupported portion and the supporting portion may have the same thickness.

The thickness of the unsupported portion may be formed to be 0.5 ~ 2.0mm.

The length of the support portion may have a length smaller than the length of the unsupported portion when viewed in the longitudinal direction of the diaphragm.

It may further include an elastic plate that is filled in the open groove and elastically supports the pouch film located in the forming groove.

The upper surface of the elastic plate may have the same height as the upper surface of the support when viewed from the upper surface of the die.

An upper portion of the support portion on which the pouch film is supported may be formed in an arc shape.

On the other hand, in the die unit manufacturing method of the present invention, a rectangular upper die is prepared, and then a forming groove position for processing a forming groove on the surface of the upper die is displayed, and then, a diaphragm is attached to the forming groove position. Preparing step (S10) for displaying the partition plate position for processing; A forming hole forming step (S20) of punching the forming groove position indicated on the upper die, and punching only the forming groove position excluding the diaphragm position portion to form two forming holes based on the partition plate position portion; The diaphragm forming step of cutting the rest of the upper surface of the diaphragm location part except for some surfaces connected to the forming groove by a set height to complete a diaphragm having a supporting part connected to the forming groove and an unsupported part having a height lower than that of the supporting part (S30); And a die unit completion step (S40) of combining the upper die having the forming hole and the diaphragm formed with the lower die having a rectangular shape to complete the die unit.

The forming hole forming step (S20) and the diaphragm forming step (S30) may be performed simultaneously.

In the diaphragm forming step (S30), the set height may be 0.5 to 2.0 mm.

On the other hand, the pouch molding apparatus of the present invention includes a die unit on which a pouch film is disposed; And a pressing unit for pressing the pouch film disposed on the die unit to form an electrode assembly receiving portion, wherein the die unit includes: a die having a forming groove formed on an upper surface on which the pouch film is disposed; And a diaphragm connected to both walls of the forming groove and dividing the forming groove into at least two, wherein the diaphragm includes a support part for supporting the pouch film located in the forming groove, and the diaphragm located in the forming groove It may include an unsupported portion that does not support the pouch film.

The die unit of the present invention is characterized in that it includes an unsupported portion through which the pressing force is not transmitted to the diaphragm provided in the forming groove, and due to this feature, the pressing force applied to the diaphragm can be greatly reduced, and thus the diaphragm It can be prevented from being damaged or deformed, and as a result, the life cycle of the die unit can be greatly extended, and in particular, the continuity of the molding process can be greatly improved.

1 is a perspective view showing a die unit according to a first embodiment of the present invention.
2 is a cross-sectional view taken along line AA shown in FIG. 1.
3 is a partially enlarged view of FIG. 2.
4 is a cross-sectional view showing a first example of an unsupported portion in the die unit according to the first embodiment of the present invention.
5 is a cross-sectional view showing a second example of an unsupported portion in the die unit according to the first embodiment of the present invention.
6 is a cross-sectional view showing a third example of an unsupported portion in the die unit according to the first embodiment of the present invention.
7 is a flow chart showing a method of manufacturing a die unit according to the first embodiment of the present invention.
8 is a process chart showing a method of manufacturing a die unit according to the first embodiment of the present invention.
9 is a cross-sectional view showing a pouch forming apparatus according to a second embodiment of the present invention.
10 is a cross-sectional view showing a working state of the pouch forming apparatus according to the second embodiment of the present invention.
11 is a cross-sectional view showing a die unit according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

[Die unit according to the first embodiment of the present invention]

In the die unit 110 according to the first embodiment of the present invention, as shown in FIGS. 1 to 3, a pouch film is disposed, and a forming groove 111a is formed on an upper surface on which the pouch film 10 is disposed. And a diaphragm 112 connected to the formed die 111 and the wall surfaces corresponding to each other of the forming groove 111a and dividing the forming groove 111a into at least two or more, preferably two.

The die unit 110 having such a configuration pressurizes both surfaces of the pouch film 10 disposed on the upper surface of the die 111 based on the diaphragm 112 to be molded into the inside of the forming groove 111a. Then, a pair of electrode assembly accommodating portions may be formed based on the center of the pouch film 10 on which the diaphragm 112 is located.

Here, the pressing force pressing both surfaces of the pouch film 10 is transmitted to the diaphragm 112 as it is, and accordingly, the diaphragm 112 may be damaged or deformed.

To prevent this, in the diaphragm 112 of the die unit 110 according to the first embodiment of the present invention, the pressing force applied to the diaphragm 112 is not transmitted as it is, or, in particular, the pressing force is transmitted to the center of the diaphragm 112. It has a structure that is not, accordingly, it is possible to prevent the diaphragm 112 from being damaged or deformed.

As an example, the diaphragm 112 has a support part 112a that supports the pouch film 10 located in the forming groove 111a, and does not support the pouch film 10 located in the forming groove 111a. Including the unsupported portion (112b), and thus the pressing force is not transmitted to the unsupported portion (112b) that does not support the pouch film 10, it is possible to reduce the pressing force applied to the diaphragm 112, in particular unknown As the area of the branch part 112b is secured larger than the area of the support part 112a, the pressing force applied to the diaphragm 112 can be greatly reduced, and as a result, the diaphragm 112 can be prevented from being damaged or deformed. .

In more detail, the support part 112a is connected to both wall surfaces of the forming groove 111a as seen in FIG. 1 and is provided with first and second support surfaces at the same height as the upper surface of the die 111 ( 112a-1) and 112a-2, and the first and second support surfaces 112a-1 and 112a-2 support the pouch film 10 located in the forming groove 111a. That is, the support part 112a is connected to the wall surface of the molding groove 111a and thus has a higher strength than the unsupported part 112b, thereby supporting the pouch film 10 located in the molding groove 111a. Thus, the pouch film 10 is prevented from being deformed toward the inside of the forming groove 111a.

Here, the upper portion of the support portion 112a supporting the pouch film 10 may be formed in an arc shape, thereby minimizing the contact area between the support portion 112a and the pouch film 10, and in particular, the pouch film (10) It can be guided so that it is formed stably.

The unsupported part 112b is provided between the first and second support surfaces 112a-1 and 112a-2, and the first and second support surfaces when viewed from the top surface of the die 111 (112a-1) is provided at a height lower than that of 112a-2, and accordingly, the unsupported portion 112b is disposed between the first and second support surfaces 112a-1 and 112a-2. 10) to form an open groove (112b-1) that does not support.

That is, the pouch film 10 located in the forming groove 111a is not supported as the upper surface of the unsupported part 112b is formed to have a lower height than the upper surface of the support part 112a. Accordingly, the pouch film 10 ) Is not transmitted to the unsupported portion 112b, and as a result, the pressing force generated during the molding of the pouch film 10 applied to the diaphragm 112 by the area of the unsupported portion 112b Can be reduced.

Therefore, the die unit 110 according to the first embodiment of the present invention is characterized in that it includes a support part 112a and a partition plate 112 in which the non-support part 112b is formed. When forming the film 10, the pressing force applied to the diaphragm 112 may be reduced, and as a result, the diaphragm 112 may be greatly prevented from being damaged or deformed.

Meanwhile, the open groove 112b-1 formed on the unsupported portion 112b may be implemented in various forms.

"자 형태로 형성될 수 있다. 즉, 상기 개방홈(112b-1)은 상기 제1 및 제2 지지면(112a-1)(112a-2)에 연결된 벽면이 수직면으로 구비되면서 사각 형태로 구현되며, 이에 따라 개방홈(112b-1)의 면적을 크게 확보할 수 있고, 그 결과 상기 파우치필름(10) 성형시 발생하는 가압력이 상기 미지지부(112b)에 전달되는 것을 크게 방지할 수 있다.As a first example, the opening groove (112b-1), as shown in Figure 4, between the first and second support surface (112a-1) (112a-2) "

"Can be formed in a shape. That is, the open groove 112b-1 is implemented in a rectangular shape while the wall surfaces connected to the first and second support surfaces 112a-1 and 112a-2 are provided in a vertical surface. Accordingly, it is possible to secure a large area of the open groove 112b-1, and as a result, it is possible to largely prevent a pressing force generated during molding of the pouch film 10 from being transmitted to the unsupported portion 112b.

”자 형태로 형성될 수 있다. 즉, 상기 제1 및 제2 지지면(112a-1)(112a-2)으로부터 미지지부(112b) 중앙으로 갈수록 폭이 점차 작아지는 삼각형태로 구현되며, 이에 따라 지지부(112a)와 미지지부(112b)의 연결면적을 증대시킬 수 있고, 그 결과 지지부(112a)와 미지지부(112b)의 결합력을 높일 수 있다.As a second example, the opening groove (112b-1), as shown in Figure 5, between the first and second support surfaces (112a-1) (112a-2) "

It can be formed in a ”shape. That is, it is implemented in a triangular shape whose width gradually decreases from the first and second support surfaces 112a-1 and 112a-2 toward the center of the unsupported part 112b. Accordingly, the support part 112a and the unsupported part ( The connecting area of 112b) can be increased, and as a result, the bonding force between the supporting portion 112a and the unsupported portion 112b can be increased.

”자 형태로 형성될 수 있다. 즉, 상기 제1 및 제2 지지면(112a-1)(112a-2)으로부터 미지지부(112b) 중앙으로 갈수록 폭이 점차 작아지는 곡면형태로 구현되며, 이에 따라 개방홈(112b-1)의 표면에 절곡되는 부분을 제거할 수 있고, 그 결과 절곡 부위에서 발생하는 크랙을 미연에 방지할 수 있다.As a third example, the opening groove (112b-1), as shown in Figure 6, between the first and second support surfaces (112a-1) (112a-2) "

It can be formed in a ”shape. That is, the first and second support surfaces 112a-1 and 112a-2 are implemented in a curved shape whose width gradually decreases toward the center of the unsupported part 112b, and accordingly, the opening groove 112b-1 The portion that is bent on the surface can be removed, and as a result, cracks occurring in the bent portion can be prevented in advance.

Meanwhile, referring to FIG. 3, the unsupported portion 112b has a height lower than that of the supporting portion 112a by a set height α when viewed from the upper surface of the die 111. In particular, the set height α may be 1 to 2 mm. That is, when the height of the unsupported part 112b is less than 1mm than the support part 112a, the difference in height between the upper surface of the unsupported part 112b and the upper surface of the support part 112a when viewed from the upper surface of the die 111 Since is not large, the pressing force applied to the pouch film 10 may be transmitted as it is to the unsupported portion 112b, and accordingly, the diaphragm may be damaged or deformed. In addition, when the unsupported portion 112b has a height 2mm higher than the support portion 112a, a small pressing force on the unsupported portion 112b is reduced as the connection area between the unsupported portion 112b and the supporting portion 112a decreases. Even if transmitted, cracks may occur in the connection portion between the unsupported portion 112b and the support portion 112a.

As a result, the unsupported portion 112b has a height of 1 to 2 mm lower than that of the supporting portion 112a when viewed from the upper surface of the die 111, and thus, the pressing force of the pouch film 10 is maintained as the unsupported portion 112b. ), while preventing cracks from occurring in the connection portion between the unsupported portion 112b and the support portion 112a.

Meanwhile, the unsupported portion 112b and the support portion 112a may have the same thickness. Accordingly, the side of the electrode assembly accommodating portion (the side of the electrode assembly accommodating portion facing the diaphragm) formed on the pouch film 10 can be formed vertically with respect to the diaphragm 112, resulting in product defects. Can be prevented.

Here, the unsupported portion 112b and the support portion 112a may have different thicknesses. For example, the unsupported portion 112b may have a thickness smaller than that of the supporting portion 112a. This is because the pressing force of the pouch is not transmitted to the unsupported portion 112b as it is, so that the thickness of the unsupported portion 112b can be formed smaller than that of the supporting portion 112a, thereby reducing manufacturing cost.

Meanwhile, the thickness of the unsupported portion 112b may be formed to a set thickness, and the set thickness may be 0.5 to 2.0 mm. That is, when the thickness of the unsupported portion 112b is formed to be 0.5 or less, the unsupported portion 112b may be easily damaged or deformed with only a small pressing force applied from the pouch film 10. In particular, precision machining may be required. In addition, when the thickness of the unsupported portion 112b is formed to be 2.0mm or more, damage of the unsupported portion can be stably prevented from the pressing force applied from the pouch film, but manufacturing cost may be large. As a result, the thickness of the unsupported portion 112b is formed to be 0.5 to 2.0 mm, and accordingly, the manufacturing cost can be greatly reduced while preventing the unsupported portion from being damaged.

In particular, the diaphragm 112 of the present invention has a feature of forming an unsupported portion 112b at a central portion of weak strength, and accordingly, even if the thickness of the diaphragm 112 is formed to be 2 mm or less, the diaphragm 112 is damaged or It can prevent deformation.

Meanwhile, the length of the support part 112a may have a length smaller than that of the unsupported part 112b when viewed in the longitudinal direction of the diaphragm 112. That is, the length of the unsupported portion 112b is formed larger than the combined length of the pair of support portions 112a connected to the forming groove 111a, and accordingly, the support area of the pouch film 10 and the diaphragm 112 It can be minimized, and as a result, the pressing force applied to the diaphragm 112 from the pouch film 10 can be greatly reduced.

Hereinafter, a method of manufacturing the die unit 110 according to the first embodiment of the present invention will be described.

[Method of manufacturing die unit according to the first embodiment of the present invention]

The manufacturing method of the die unit according to the first embodiment of the present invention is a preparation step of preparing the upper die 1 in which the forming groove position 2 and the diaphragm position 3 are marked as shown in FIG. 7 (S10), forming a hole forming step (S20) of forming the two forming groove positions (2) located on both sides of the diaphragm location (3), the upper part where the diaphragm and the forming hole are formed by forming the diaphragm location (3) It includes a diaphragm forming step (S30) of completing the die 1, and a die unit completion step (S40) of combining the upper die 1 and the lower die 4 to complete the die unit 110.

In the preparation step (S10), as shown in FIG. 8A, the upper die 1 in a rectangular shape is prepared. Next, mark the forming groove location (2) for processing the forming groove on the surface of the upper die (1), and next, the diaphragm location (3) for processing the diaphragm on the forming groove location (2) Is displayed. At this time, the partition plate position part 3 is marked at a position where the forming groove position part 2 is equally divided into two.

The forming hole forming step (S20) punches the forming groove position 2 marked on the upper die 1, as shown in FIG. 8B. At this time, only the forming groove position part 2 except the partition plate position part 3 is punched, and accordingly, two forming holes 1a are formed on the surface of the upper die 1 based on the partition plate position part 3. Molded.

The diaphragm forming step (S30) cuts the rest of the upper surface of the diaphragm position part 3 except for some surfaces connected to the forming hole 1a by a set height, as shown in FIG. 8(c). To remove. That is, in the diaphragm forming step (S30), the center of the upper surface of the diaphragm positioning part 3 is cut by 0.5 to 2.0 mm from the upper surface of the upper die 1. Then, the support part 112a connected to the wall surface of the forming hole 1a and the partition plate 112 including an unsupported part 112b having a lower height than the support part 112a and provided between the support part 112a is completed. can do. And when the molding of the diaphragm 112 is completed, the upper die 1 is completed.

In the die unit completion step (S40), as shown in (d) of FIG. 8, the upper die 1, in which the forming hole and the diaphragm are completed, is coupled to the lower die 4 in a rectangular shape, and the die unit ( 110) can be completed. At this time, the forming hole (1a) becomes a forming groove (111a) as the lower portion is closed by the lower die (4).

On the other hand, the forming hole forming step (S20) and the diaphragm forming step (S30) may be performed at the same time, thereby simplifying the process of the operation, it is possible to reduce cost as a result.

Hereinafter, in describing another embodiment of the present invention, the same component symbols are used for components having the same components and functions as those of the first embodiment, and redundant descriptions will be omitted.

[Pouch forming apparatus according to the second embodiment of the present invention]

The pouch forming apparatus 100 according to the second embodiment of the present invention includes a die unit 110 in which the pouch film 10 is disposed and the die unit 110 as shown in FIGS. 9 and 10. It includes a pressing unit 120 for pressing the arranged pouch film 10 to form an electrode assembly receiving portion.

The die unit 110 is connected to a die 111 having a forming groove 111a formed on an upper surface on which the pouch film 10 is disposed, and both walls of the forming groove 111a, and has at least the forming groove 111a. It includes a diaphragm 112 divided into two or more.

Here, the diaphragm 112 is a support portion 112a for supporting the pouch film 10 located in the forming groove 111a, and an unsupported portion not supporting the pouch film 10 located in the forming groove 111a (112b).

Meanwhile, the die unit 110 has the same configuration and function as the die unit according to the first embodiment described above, and accordingly, a duplicate description will be omitted.

The pressing unit 120 is for pressing the pouch film 10 located in the forming groove 111a to form an electrode assembly receiving portion, and is provided on the die unit 110 and includes the die unit 110. Inserted into the molding groove 111a while pressing the moving part 121 provided to be able to descend toward the moving part 121 and the pouch film 10 provided on the bottom of the moving part 121 and located in the molding groove 111a While the pouch film 10 includes a pressing portion 122 for forming an electrode assembly receiving portion.

Meanwhile, the pressing parts 122 are provided on both sides of the bottom of the moving part 121 based on the diaphragm 112, and accordingly, on both sides of the pouch film 10 with respect to the diaphragm 112 Each of the electrode assembly receiving portions is formed.

Here, the pressing force of the pressing unit 120 is transmitted to the diaphragm 112 through the pouch film 10. At this time, since the support part 112a of the diaphragm 112 supports the pouch film 10, the pressurization Although the pressing force of the unit 120 is transmitted, since the unsupported portion 112b does not support the pouch film 10, the pressing force of the pressing unit 120 is not transmitted, and accordingly, the leg plate through the pressing unit 120 The pressing force applied to the 112 may be reduced, and as a result, the diaphragm 112 may be prevented from being damaged or deformed.

Therefore, the pouch forming apparatus 100 according to the second embodiment of the present invention is characterized in that it includes a partition plate 112 on which a support part 112a and an unsupported part 112b are formed, and due to this feature, the partition plate 112 This can be prevented from being damaged, thereby improving the continuity of work, and as a result, it is possible to increase the productivity of the product.

[Die unit according to the third embodiment of the present invention]

The die unit 110 according to the third embodiment of the present invention includes a die 111 having a forming groove 111a formed on an upper surface on which the pouch film 10 is disposed, as shown in FIG. 11, and the forming groove. It includes a diaphragm 112 connected to the opposite wall surfaces of 111a and dividing the forming groove 111a into at least two or more.

The diaphragm 112 includes a pair of support portions 112a that are respectively connected to corresponding surfaces of the forming grooves 111a to support the pouch film 10 located in the forming grooves 111a, and the It includes an unsupported portion 112b that is provided between the pair of support portions 112a and does not support the pouch film 10 located in the forming groove 111a.

The unsupported part 112b is provided at a height lower than the first and second support surfaces when viewed from the upper surface of the die, and an open groove not supporting the pouch film located in the forming groove is formed.

Here, the die unit 110 according to the third embodiment of the present invention may include an elastic plate 113 that is filled in the open groove and elastically supports the pouch film located in the forming groove.

That is, the elastic plate 113 elastically supports the pouch film 10 located on the unsupported portion 112b, and accordingly, the pouch film 10 does not bend and maintains a flat state while being attached to the pouch film 10. The applied pressing force is prevented from being transmitted to the unsupported portion 112b as it is, and as a result, the electrode assembly receiving portion formed on the pouch film 10 can be accurately formed, and damage to the diaphragm 112 can be prevented.

On the other hand, the elastic plate 113 has the same height as the support part when viewed from the surface of the die 111, and accordingly, it is possible to prevent the pouch film 10 from bent convex or concave.

In particular, the elastic plate 113 may be integrated with the unsupported portion 112b by adhesive or heat fusion, and thus, the bonding property between the elastic plate 113 and the unsupported portion 112b can be improved.

In addition, the elastic plate 113 has the same thickness as the unsupported portion 112b, and accordingly, it is possible to prevent the formation of a step between the elastic plate 113 and the unsupported portion 112b, and as a result It is possible to greatly prevent the detachment phenomenon of the elastic plate 113.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and various embodiments derived from the meaning and scope of the claims and their equivalent concepts are possible.

100: pouch forming device
110: die unit
111: die
112: plate
113: elastic plate
120: pressurization unit

Claims (15)

A die having a forming groove formed on an upper surface on which the pouch film is disposed; And
It is connected to both walls of the forming groove, and includes a partition plate dividing the forming groove into at least two or more,
The diaphragm is a die unit including a support portion for supporting the pouch film located in the forming groove, and an unsupported portion not supporting the pouch film located in the forming groove. The method according to claim 1,
The support part is a die unit including first and second support surfaces connected to both wall surfaces of the forming groove and provided at the same height as the upper surface of the die and supporting the pouch film located in the forming groove. The method according to claim 2,
The unsupported portion is provided between the first and second support surfaces, is provided at a height lower than the upper surfaces of the first and second support surfaces when viewed from the upper surface of the die, and is located in the forming groove. A die unit having an open groove that does not support the pouch film. The method of claim 3,
The open groove is between the first and second support surfaces "

”, “

”And“

A die unit formed in any one of ”. The method of claim 3,
The upper surface of the unsupported part is a die unit having a height of 1 to 2 mm lower than the upper surface of the support part when viewed from the upper surface of the die. The method according to claim 1,
The non-supporting portion and the supporting portion of the die unit having the same thickness. The method of claim 6,
The thickness of the unsupported portion is 0.5 ~ 2.0mm is formed in the die unit. The method of claim 3,
A die unit having a length of the support portion is smaller than the length of the unsupported portion when viewed in the longitudinal direction of the diaphragm. The method of claim 3,
The die unit further comprises an elastic plate that is filled in the open groove and elastically supports the pouch film located in the forming groove. The method of claim 9,
The die unit has an upper surface of the elastic plate having the same height as the upper surface of the support when viewed from the upper surface of the die. The method of claim 8,
An upper portion of the support portion on which the pouch film is supported is formed in an arc shape. A preparation step of preparing a rectangular upper die, and then marking a forming groove position for processing a forming groove on the surface of the upper die, and then displaying a diaphragm position for processing the diaphragm at the forming groove position ( S10);
A forming hole forming step (S20) of punching the forming groove position indicated on the upper die, and punching only the forming groove position excluding the diaphragm position portion to form two forming holes based on the partition plate position portion;
The diaphragm forming step of cutting the rest of the upper surface of the diaphragm location part except for some surfaces connected to the forming groove by a set height to complete a diaphragm having a supporting part connected to the forming groove and an unsupported part having a height lower than that of the supporting part (S30); And
And a die unit completion step (S40) of completing the die unit by combining the upper die having the forming hole and the diaphragm formed into the rectangular lower die. The method of claim 12,
The die unit manufacturing method in which the forming hole forming step (S20) and the diaphragm forming step (S30) are performed simultaneously. The method of claim 12,
In the diaphragm forming step (S30), the set height is 0.5 ~ 2.0mm die unit manufacturing method. A die unit on which a pouch film is disposed; And
Comprising a pressurizing unit for pressing the pouch film disposed on the die unit to form an electrode assembly receiving portion,
The die unit,
A die having a forming groove formed on an upper surface on which the pouch film is disposed; And
It is connected to both walls of the forming groove, and includes a partition plate dividing the forming groove into at least two or more,
The diaphragm is a pouch forming apparatus comprising a support portion for supporting the pouch film located in the forming groove and an unsupported portion not supporting the pouch film located in the forming groove.

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