KR102670092B1 - Forming device and method for pouch - Google Patents

Abstract

The pouch forming apparatus of the present invention includes a die assembly provided with a die on which a pouch film is placed; a stripper assembly that presses and secures both sides of the pouch film placed on the die; And a punch assembly provided with a punch for forming an electrode assembly receiving portion on the pouch film disposed on the die, wherein the stripper assembly includes a stripper provided below the punch assembly and pressurizing and fixing the pouch film disposed on the die. ; It includes a stripper driving piece provided on an upper part of the punch assembly and providing force so that the stripper presses the pouch film, and a connecting portion connecting the stripper driving piece and the stripper to transmit force, the connecting portion comprising: Two or more connecting rods coupled to the stripper; A connecting bar coupled to the stripper driving piece; and a connecting piece connecting at least one of the two or more connecting rods and the connecting rod so that force can be transmitted.

Description

Pouch forming device and forming method {FORMING DEVICE AND METHOD FOR POUCH}

The present invention relates to a pouch forming device and forming method capable of forming pouches for secondary batteries.

In general, secondary batteries refer to batteries that can be charged and discharged, unlike primary batteries that cannot be recharged, and are widely used in electronic devices such as mobile phones, laptop computers, camcorders, and electric vehicles.

Such a secondary battery includes an electrode assembly having an electrode tab, an electrode lead coupled to the electrode tab, and a pouch accommodating the electrode assembly with the tip of the electrode lead pulled out. The pouch includes a receiving portion that accommodates the electrode assembly, and a sealing portion that is formed along an edge of the receiving portion and seals the receiving portion.

Meanwhile, the molding device for molding the pouch includes a die on which the pouch film is disposed, a stripper for fixing the pouch film disposed on the die, and a punch for molding an electrode assembly receiving portion on the pouch film disposed on the die.

However, the stripper included in the conventional pouch forming device has limitations in stably pressing and fixing the pouch film, whose size and shape changes due to design changes, and as a result, when forming the pouch film, it is damaged in a local area, that is, the edge of the receiving portion. There was a problem with cracks and wrinkles occurring in the area.

Domestic Patent Publication No. 10-2008-0081845.

The problem of the present invention to solve the above problems is to implement a variable stripper that can adjust the position of pressing the pouch, so that the local area of the pouch can be stably pressed and fixed, and the size and size can be changed by design changes. The object of the present invention is to provide a pouch forming device and forming method that can stably pressurize and fix pouch films of varying shapes and thereby prevent cracks and wrinkles from occurring during pouch forming.

The pouch forming apparatus of the present invention for solving the above problems includes a die assembly provided with a die on which a pouch film is disposed; a stripper assembly that presses and secures both sides of the pouch film placed on the die; And a punch assembly provided with a punch for forming an electrode assembly receiving portion on the pouch film disposed on the die, wherein the stripper assembly includes a stripper provided below the punch assembly and pressurizing and fixing the pouch film disposed on the die. ; It includes a stripper driving piece provided on an upper part of the punch assembly and providing force so that the stripper presses the pouch film, and a connecting portion connecting the stripper driving piece and the stripper to transmit force, the connecting portion comprising: Two or more connecting rods coupled to the stripper; A connecting bar coupled to the stripper driving piece; And it may include a connecting piece connecting at least one of the two or more connecting rods and the connecting bar so that force can be transmitted.

The connecting piece may be disposed between the connecting rod and the connecting bar and may be provided to connect the connecting rod and the connecting bar to transmit force.

The connection part places a connection piece between any one of the two or more connection rods and the connection bar, and removes the connection piece between the remaining connection rods and the connection bar. The position of the force transmitted to the stripper through the stripper drive piece. can be adjusted.

Two or more connecting rods may be coupled to the stripper while disposed along the edge of the stripper.

The connecting bar is formed with two or more insertion grooves into which two or more connecting rods are respectively inserted, and an empty space is formed between the bottom surface of the insertion groove and the connecting rod so that the force transmitted to the connecting bar is not transmitted to the connecting rod, and the connecting piece Can be disposed in the empty space and connect the connecting rod and the connecting bar to enable force transmission.

The connecting rods are provided in numbers of at least five, and the connecting bars are formed with five or more insertion grooves for inserting five or more connecting rods, and the connecting pieces are between at least three consecutive connecting rods and the insertion grooves of the connecting bars. It can be arranged to be arranged.

The insertion groove, the connecting rod, and the connecting piece may be located on the same vertical line when viewed from the upper surface of the connecting bar and may have a circular shape.

A through hole may be formed in the connecting piece.

The connecting piece may be provided to be fitted and coupled to the connecting rod.

The connecting piece may be made of a material having the same strength as the connecting rod or the connecting bar.

The connection piece has a structure in which a plurality of connection blocks are stacked in multiple stages, and the thickness of the connection piece can be adjusted depending on the number of connection blocks stacked.

Meanwhile, the pouch forming method of the present invention includes the steps of (a) placing a pouch film on a die of a die assembly; (b) fixing the pouch film placed on the die by pressing it through a stripper assembly including a stripper, a stripper driving piece, and a connection portion connecting the stripper and the stripper driving piece to enable force transmission; and (c) manufacturing a pouch film with an electrode assembly receiving portion formed thereon by molding the pouch film placed on the die through a punch of the punch assembly, wherein in step (b), the connection portion includes two or more connecting rods, a connecting bar, and Includes a connecting piece, wherein the connecting part has two or more connecting rods coupled to the stripper, a connecting bar is coupled to the stripper driving piece, and at least one of the two or more connecting rods and the connecting bar are connected by the connecting piece to the stripper. and the stripper driving piece can be connected to enable force transmission.

In step (b), the connecting piece may be disposed between the connecting rod and the connecting bar and connect the connecting rod and the connecting bar to transmit force.

In step (b), the connection part places a connection piece between any one of the two or more connection rods and the connection bar, and removes the connection piece between the remaining connection rods and the connection bar to drive the stripper through the stripper drive piece. The position of the force transmitted to can be adjusted.

In step (b), at least five or more connecting rods are provided, the connecting bar has five or more insertion grooves for inserting five or more connecting rods, and the connecting piece includes at least three or more consecutive connecting rods. By being placed between the insertion grooves of the connecting bar, the position of the force transmitted to the stripper can be adjusted.

The pouch forming apparatus of the present invention includes a die assembly, a stripper assembly, and a punch assembly, wherein the stripper assembly includes a stripper, a stripper driving piece, and a connecting portion, wherein the connecting portion includes two or more connecting rods coupled to the stripper; A connecting bar coupled to the stripper driving piece; And it is characterized in that it includes a connecting piece connecting any one or more of the two or more connecting rods and the connecting bar so that force can be transmitted. Due to this feature, the position of the force transmitted to the stripper through the stripper driving piece can be adjusted, and thus pouch films of various shapes and sizes can be stably pressed and fixed, resulting in cracks during pouch molding. And it can prevent wrinkles from occurring.

1 is an assembled perspective view showing a pouch forming device according to a first embodiment of the present invention.
Figure 2 is an exploded perspective view showing a pouch forming device according to a first embodiment of the present invention.
Figure 3 is a side view showing a pouch forming device according to the first embodiment of the present invention.
Figure 4 is a cross-sectional view showing a pouch forming device according to the first embodiment of the present invention.
Figure 5 is an enlarged view of portion 'A' shown in Figure 4.
Figure 6 is a side view showing a first example of a pouch forming device according to the first embodiment of the present invention.
Figure 7 is a side view showing a second example of the pouch forming device according to the first embodiment of the present invention.
Figure 8 is a flow chart showing the pouch forming method according to the first embodiment of the present invention.
Figure 9 is a perspective view showing a pouch forming device according to a second embodiment of the present invention.
Figure 10 is a cross-sectional view showing a pouch forming device according to a third embodiment of the present invention.
Figure 11 is a perspective view showing a pouch forming device according to a fourth embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

[pouch]

Referring to Figure 4, the pouch is intended to accommodate the electrode assembly. That is, the pouch includes an electrode assembly receiving portion 11 that accommodates the electrode assembly, and a sealing portion 12 that seals the electrode assembly receiving portion 11.

The method of manufacturing a pouch with this structure involves forming an electrode assembly receiving portion on one side of the pouch film, bending the other side of the pouch film to overlap the electrode assembly receiving portion, and then sealing the edge of the pouch film. Then, the finished product pouch can be manufactured.

At this time, the electrode assembly receiving portion formed in the pouch film is molded by the pouch molding device of the present invention.

[Pouch forming device according to the first embodiment of the present invention]

As shown in FIGS. 1 to 7, the pouch forming apparatus according to the first embodiment of the present invention includes a die assembly 100 provided with a die on which a pouch film 10 is disposed, and a pouch film disposed on the die. It includes a stripper assembly 200 that presses and fixes both sides, and a punch assembly 300 provided with a punch for forming an electrode assembly receiving portion in the pouch film 10 disposed on the die.

die assembly

The die assembly 100 is for disposing the pouch film 10 and includes a die 110 on which the pouch film 10 is disposed on the upper surface, and a die holder 120 on which the die 110 is fixed.

Here, the die 110 has a smaller area than the die holder 120. And a molding part 111 is formed on the upper surface of the die 110 for molding the electrode assembly receiving part in the pouch film 10. Meanwhile, the molded portion may be provided with a molded groove.

That is, the die 110 includes an upper die and a lower die that are stacked vertically, the upper die has a molding hole penetrating upward and downward on the upper surface, and the lower die is disposed below the upper die to form the molding hole. Close the lower part of the hall. Accordingly, the lower part of the forming hole is closed by the lower die to form a forming groove, which is a forming part.

stripper assembly

The stripper assembly 200 is for fixing the pouch film placed on the die member so that it does not move. That is, the stripper assembly 200 is provided to be movable up and down on the upper part of the die assembly 100 and fixes both ends of the pouch film 10 placed on the die 110 by pressing (i.e. pressing). (210) and a stripper drive piece 220 that provides force to press the pouch film 10 by raising or lowering the stripper 210, and the stripper 210 and the stripper drive piece 220 are applied with force. It includes a connection part 230 that connects to enable transfer.

The stripper 210 has a size corresponding to (that is, the same as) the upper surface of the die 110, and a through hole of the same size as the molding part 111 is formed in the upper surface. Meanwhile, the stripper driving piece 220 may be a cylinder.

punch assembly

The punch assembly 300 is used to form an electrode assembly receiving portion on a pouch film placed on a die. That is, the punch assembly 300 is provided on the upper part of the die assembly 100 to be movable up and down, and is inserted into the forming part 111 to form the electrode assembly receiving part 11 in the pouch film 10. It includes a punch 310, a punch plate 320 on which the punch 310 is fixed, and a punch driving piece 330 that fixes the punch plate 320 or moves it in the vertical direction. Meanwhile, the punch driving piece 330 may be a cylinder.

The pouch forming apparatus according to the first embodiment of the present invention having the above configuration places the pouch film 10 on the die 110 of the die assembly 100, and then attaches the die assembly 100 to the punch assembly 300. rise in the direction Then, the stripper 210 of the stripper assembly 200 is pressed on both sides of the pouch film 10 disposed on the die 110, thereby fixing the pouch film 10. At this time, the stripper assembly 200 interlocks the stripper 210 with the die 110 through the stripper drive piece 220 and the connection portion 230 when the force of the stripper 210 that presses the pouch film 10 reaches the set pressure. It rises as high as possible, and accordingly, the pressing force of the stripper 210 is kept constant.

In particular, referring to FIG. 4, when the die 110 is raised, the punch 310 of the punch assembly 300 is supported by the pouch film 10. At this time, since the punch assembly 300 is fixed, the punch 310 is attached to the pouch. The film 10 is inserted into the forming part 111 of the die 110 in a pressurized state, and thus the pouch film 10 is formed to form the electrode assembly receiving part 11. And a sealing portion 12 is formed on the edge of the electrode assembly receiving portion 11.

Therefore, the pouch forming apparatus according to the first embodiment of the present invention can stably form the electrode assembly receiving portion in the pouch film by including the die assembly 100, the stripper assembly 200, and the punch assembly 300.

On the other hand, when a secondary battery design change occurs, the size and shape of the pouch also change. At this time, the pouch forming device according to the first embodiment of the present invention can vary the position of the force transmitted to the stripper depending on the design change or the pouch in which the design change has occurred, thereby increasing the holding force of the pouch.

That is, the pouch forming device according to the first embodiment of the present invention has a structure that can vary the position of the force transmitted to the stripper 210 depending on the size and shape of the pouch film disposed on the die 110. Accordingly, the pressing force of the stripper 210 can be concentrated on the pouch film 10 disposed on the die 110, and thus the fixing force of the pouch film 10 can be increased.

As an example, the pouch forming device according to the first embodiment of the present invention includes a connection part (or a connection part) that can vary (or adjust) the position of the force transmitted from the stripper driving piece 220 of the stripper assembly 200 to the stripper 210. 230).

The connecting portion 230 is for controlling the connection position where the force of the stripper driving piece 220 and the stripper 210 is transmitted, and includes two or more connecting rods 231 coupled to the stripper 210, the stripper driving piece ( It includes a connecting bar 232 coupled to the connecting bar 220, and a connecting piece 233 connecting at least one connecting rod 231 among the two or more connecting rods 231 and the connecting bar 232 so that force can be transmitted.

Here, the connecting piece 233 may be disposed between the connecting rod 231 and the connecting bar 232 and may be provided to connect the connecting rod and the connecting bar so that force can be transmitted.

The connecting rods 231 are formed of two or more, and are coupled to the stripper 210 with their lower ends disposed along the edge of the stripper 210 (left and right directions as seen in FIG. 3). At this time, two or more connecting rods 231 may be arranged at regular intervals.

The connecting bar 232 is formed to extend long in the direction in which the connecting rod is disposed.

The connecting piece 233 connects all of the two or more connecting rods 231 to the connecting bar 232 to enable force transmission, or transmits force to one or more connecting rods 231 among the two or more connecting rods 231 to the connecting bar 232. Connect as possible.

That is, the connecting portion 230 is arranged in close contact with the connecting bar 232, the connecting piece 233, and the connecting rod 231 in that order when the connecting piece 233 is placed between the connecting rod 231 and the connecting bar 232, thereby forming a stripper. The force of the driving piece 220 can be transmitted to the stripper 210. In addition, if the connecting piece 233 is not disposed between the connecting rod 231 and the connecting bar 232, the connecting bar 232 and the connecting rod 231 are spaced apart and the force of the stripper driving piece 220 is applied to the stripper 210. cannot be passed on.

In particular, the connection part 230 has a connection piece 233 disposed between any one of the two or more connection rods 231 and the connection bar 232, and the remaining connection rods 231 and the connection bar ( 232), the connecting piece 233 can be removed. Accordingly, the position of the force transmitted to the stripper 210 through the stripper driving piece 220 can be adjusted.

In summary, when the connecting portion 230 places the connecting piece 233 only between the connecting rod 231 and the connecting bar 232 where the pouch film is located, the force of the stripper driving piece 220 is applied to the stripper 210 where the pouch film is located. ) is delivered intensively only to the portion, and as a result, the pouch film 10 can be fixed by pressing more intensively.

Therefore, the pouch forming device according to the first embodiment of the present invention includes a connecting portion 230 including two or more connecting rods 231, a connecting bar 232, and a connecting piece 233, so that the pouch film can be formed according to the size and shape of the pouch film. The position of the force transmitted to the stripper 210 can be varied (or adjusted) through the stripper driving piece 220, and as a result, the fixing force of the pouch film can be increased. In addition, it is possible to prevent the force of the stripper driving piece from being transmitted to the stripper part without the pouch film.

Meanwhile, in the pouch forming device according to the first embodiment of the present invention, the connecting bar 232 has two or more insertion grooves 232a formed in the longitudinal direction, and the two or more connecting bars 231 have two or more insertion grooves. Each is inserted in (232a). At this time, an empty space is formed between the bottom surface of the insertion groove 232a and the connecting rod 231 so that the force transmitted to the connecting bar 232 is not transmitted to the connecting rod 231, and the connecting piece 233 is formed in the empty space. While placed in a space, the connecting rod 231 and the connecting bar 232 can be connected to enable force transmission. In particular, connectivity can be improved by inserting the connecting rod 231 and the connecting piece 233 into the insertion groove 232a.

Meanwhile, in order to effectively change the position of the force transmitted to the stripper through the stripper driving piece in the pouch forming device according to the first embodiment of the present invention, at least five connecting rods 231 are spaced at regular intervals on the stripper 210. It is provided to be coupled to each other, and five or more insertion grooves 232a are formed in the connecting bar 232 to allow five or more connecting rods 231 to be inserted, and the connecting pieces 233 are at least two or more consecutive, Preferably, it is disposed between three or more connecting rods 231 and the insertion groove 232a of the connecting bar 232.

As a first example, as shown in Figure 6, the force of the stripper driving piece 220 can be varied to be transmitted to the right side of the stripper 210 through the three connecting rods 231.

As a second example, as shown in Figure 7, the stripper driving piece 220 can vary the force to be transmitted to the center of the stripper 210 through the three connecting rods 231 disposed in the center.

Therefore, the pouch forming device according to the first embodiment of the present invention can vary the position of the force applied to the stripper depending on the position of the pouch film, and as a result, the pouch film can be stably fixed.

Meanwhile, in the pouch forming device according to the first embodiment of the present invention, the insertion groove 232a, the connecting rod 231, and the connecting piece 233 are formed on the same vertical line when viewed from the upper surface of the connecting bar 232 and have a circular shape. It can have the form of Accordingly, even if the connecting piece 233 or the connecting bar 232 rotates in the left or right direction, the generation of twisting or friction force can be minimized, and the occurrence of twisting or friction force in the insertion groove 232a, the connecting rod 231, and the connecting piece 233 can be minimized. The load can be distributed effectively.

Meanwhile, in the pouch forming device according to the first embodiment of the present invention, the connecting piece 233 is made of a material with the same strength as the connecting rod 231 or the connecting bar 232, and accordingly, the connecting rod 231 It is possible to prevent problems such as deformation of thickness when the connecting piece 233 is compressed between the and the connecting bar 232.

Meanwhile, the connecting piece 233 may be made of alloy steel or steel, which is the same material as the connecting rod 231 or the connecting bar 232.

Therefore, the pouch forming device according to the first embodiment of the present invention can vary the position of the force applied to the stripper according to the pouch film of various sizes, and as a result, the fixing force of the pouch film can be increased, and as a result, the pouch is wrinkle-free. Alternatively, cracks can be prevented.

Hereinafter, a pouch forming method according to the first embodiment of the present invention will be described.

[Pouch forming method according to the first embodiment of the present invention]

As shown in FIG. 8, the pouch forming method according to the first embodiment of the present invention includes (a) placing the pouch film 10 on the die 110 of the die assembly 100, (b) stripper (210), a stripper drive piece 220, and a connection portion 230 that connects the stripper 210 and the stripper drive piece 220 to enable force transmission to the die 110 through the stripper assembly 200. Pressing and fixing both sides of the disposed pouch film 10; and (c) manufacturing the pouch film 10 on which the electrode assembly receiving portion is formed by molding the pouch film 10 disposed on the die 110 through the punch 310 of the punch assembly 300.

Here, the stripper assembly 200 has a structure that adjusts the connection position at which the force of the stripper driving piece 220 and the stripper 210 is transmitted through the connection portion 230 so that the force is concentrated on the pouch film 10.

Step (a) places the pouch film 10 on the die 110 of the die assembly 100.

In step (b), both sides of the pouch film 10 placed on the die 110 are fixed by pressing through the stripper assembly 200, and the pouch film 10 placed on the die 110 through the connection portion 230 is fixed. Control the force to be transmitted only to the stripper 210 located within the range.

Here, the connection portion 230 includes two or more connecting rods 231 coupled to the stripper 210, one connecting bar 232 coupled to the stripper driving piece 220, and one or more connecting rods 231 among the two or more connecting rods 231. It includes a connection piece 233 that connects the connection bar 232 to enable force transmission.

In more detail, the stripper is driven by placing the connecting piece 233 only between one or more connecting rods 231 among the two or more connecting rods 231 (i.e., connecting rods located within the range of the pouch film 10) and the connecting bar 232. It is connected so that the force of the piece 220 is transmitted to the stripper 210 located in the pouch film range. Here, the connecting piece 233 is disposed on the upper surface of the connecting rod 231, and the connecting rod 231 is inserted into the insertion groove 232a of the connecting bar 232 to increase connectivity. And the connecting piece 233 is removed between the remaining connecting rod 231 (i.e., the connecting rod located outside the pouch film) and the connecting bar 232, so that the force of the stripper driving piece 220 is applied to the portion of the stripper 210 located outside the pouch film. prevent it from being transmitted to Accordingly, the position of the force transmitted to the stripper through the stripper driving piece 220 can be adjusted, and the force of the stripper driving piece 220 can be concentrated on the stripper 210 where the pouch film is located, and as a result, the pouch The fixation power of the film can be increased.

For example, referring to FIGS. 6 and 7, in step (b), at least five or more connecting rods 231 are provided, and the connecting bar 232 is inserted so that five or more connecting rods 231 are inserted. More than one insertion groove 232a is formed, and the connecting piece 233 is disposed between at least three consecutive connecting rods 231 and the insertion groove 232a of the connecting bar 232. Accordingly, the force of the stripper driving piece 220 may be varied to be transmitted to the left side of the stripper 210 when viewed in FIG. 6, or may be varied to be transmitted to the center when viewed in FIG. 7.

Once the adjustment of the connection part is completed as described above, the die assembly 100 is raised in the direction of the punch assembly 300. Then, the stripper 210 is pressed against the pouch film 10 placed on the die 110, thereby fixing the pouch film. And when the pressing force of the stripper 210 reaches the set pressure, the stripper assembly 200 rises together with the die assembly 100.

In step (c), the pouch film 10 placed on the die 110 is formed through the punch 320 of the punch assembly 300. Then, a pouch film with an electrode assembly receiving portion formed thereon can be manufactured.

That is, in step (c), when the stripper assembly 200 rises together with the die assembly 100, the punch 320 is pressed against the pouch film 10. At this time, since the punch assembly 300 is fixed, the punch 320 is inserted into the molding part 111 of the die 110 while pressing the pouch film 10 to form the electrode assembly receiving part in the pouch film 10.

When the above steps are completed, a pouch film with an electrode assembly receiving portion formed can be manufactured.

Hereinafter, in describing other embodiments of the present invention, the same reference numerals are used for components having the same configuration as the above-described embodiments, and overlapping descriptions are omitted.

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

As shown in FIG. 9, the pouch forming device according to the second embodiment of the present invention includes a circular connecting piece 233, and a circular through hole 233a penetrating in the vertical direction is formed on the upper surface of the connecting piece. is formed

Accordingly, the pouch forming device according to the second embodiment of the present invention forms a through hole 233a in the connecting piece 233, thereby forming a space between the insertion groove 232a of the connecting bar 232, the connecting piece 233, and the connecting rod 231. Foreign matter generated in can be stored.

[Pouch forming device according to the third embodiment of the present invention]

As shown in FIG. 10, the pouch forming device according to the third embodiment of the present invention includes a connecting rod 231 and a connecting piece 233. Referring to FIG. 10, the connecting rod 233 is a connecting rod 231. It is inserted and connected to the upper part of the.

That is, the connecting piece 233 may be press-fitted or screwed to the upper part of the connecting rod 231.

Therefore, the pouch forming device according to the third embodiment of the present invention can increase the coupling force between the connecting rod 231 and the connecting piece 233.

[Pouch forming device according to the fourth embodiment of the present invention]

As shown in FIG. 11, the pouch forming device according to the fourth embodiment of the present invention includes a connecting piece 233, wherein the connecting piece 233 has a structure in which a plurality of connecting blocks 233a are stacked in multiple stages. have That is, the thickness of the connecting piece 233 can be adjusted depending on the number of stacked connecting blocks 233a.

Therefore, the pouch forming device according to the fourth embodiment of the present invention can manufacture the connecting piece 233 to match the height of the empty space between the bottom surface of the insertion groove of the connecting bar and the upper surface of the connecting bar.

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

10: Pouch film
100: Die assembly
110: die
111: Molding groove
120: Die holder
200: Stripper assembly
210: stripper
220: Stripper driving section
230: connection part
231: connecting rod
232: Connecting bar
232a: Insertion groove
233: Connection
300: Punch assembly
310: punch
320: Punch plate
330: Punch driving section

Claims (15)

A die assembly including a die on which the pouch film is disposed;
a stripper assembly that presses and secures both sides of the pouch film placed on the die; and
It includes a punch assembly provided with a punch for forming an electrode assembly receiving portion on the pouch film disposed on the die,
The stripper assembly includes: a stripper provided below the punch assembly and pressurizing and fixing the pouch film placed on the die; It includes a stripper driving piece provided on an upper part of the punch assembly and providing force so that the stripper presses the pouch film, and a connection portion connecting the stripper driving piece and the stripper to transmit force,
The connection portion includes two or more connecting rods coupled to the stripper; A connecting bar coupled to the stripper driving piece; and a pouch forming device comprising at least one connecting rod among two or more connecting rods and a connecting piece connecting the connecting rod so that force can be transmitted. In claim 1,
The connecting piece is disposed between the connecting rod and the connecting bar and is provided to connect the connecting rod and the connecting bar to transmit force. In claim 2,
The connection part places a connection piece between any one of the two or more connection rods and the connection bar, and removes the connection piece between the remaining connection rods and the connection bar. The position of the force transmitted to the stripper through the stripper drive piece. A pouch forming device that controls . In claim 2,
Two or more connecting rods are arranged along the edge of the stripper and are coupled to the stripper. In claim 1,
The connecting bar is formed with two or more insertion grooves into which two or more connecting rods are respectively inserted,
An empty space is formed between the bottom surface of the insertion groove and the connecting rod so that the force transmitted to the connecting bar is not transmitted to the connecting rod,
The connecting piece is disposed in the empty space and connects the connecting bar to enable force transmission. In claim 5,
The connecting rods are provided in at least five pieces,
The connecting bar is formed with five or more insertion grooves to allow five or more connecting rods to be inserted,
The connecting piece is a pouch forming device provided to be disposed between at least three consecutive connecting rods and the insertion groove of the connecting bar. In claim 5,
The insertion groove, the connecting rod, and the connecting piece are located on the same vertical line when viewed from the upper surface of the connecting bar, and have a circular shape. In claim 5,
A pouch forming device in which a through hole is formed in the connecting piece. In claim 1,
The connecting piece is a pouch forming device provided to be inserted and coupled to the connecting rod. In claim 1,
The connecting piece is a pouch forming device in which the connecting rod or the connecting bar is made of a material having the same strength. In claim 1,
The connection piece has a structure in which a plurality of connection blocks are stacked in multiple stages,
A pouch forming device in which the thickness of the connecting piece is adjusted depending on the number of stacks of the connecting blocks. (a) placing a pouch film on a die of a die assembly;
(b) fixing the pouch film placed on the die by pressing it through a stripper assembly including a stripper, a stripper driving piece, and a connection portion connecting the stripper and the stripper driving piece to enable force transmission; and
(c) manufacturing a pouch film with an electrode assembly receiving portion formed by molding the pouch film placed on the die through a punch of the punch assembly,
In step (b), the connecting portion includes two or more connecting rods, a connecting bar, and a connecting piece, wherein the connecting portion includes two or more connecting rods coupled to the stripper, a connecting bar coupled to the stripper driving piece, and two or more connecting rods. A pouch forming method in which at least one connecting rod and the connecting bar are connected by a connecting piece and connect the stripper and the stripper driving piece to enable force transmission. In claim 12,
In step (b), the connecting piece is disposed between the connecting rod and the connecting bar and connects the connecting rod and the connecting bar to transmit force. In claim 12,
In step (b), the connection part places a connection piece between any one of the two or more connection rods and the connection bar, and removes the connection piece between the remaining connection rods and the connection bar to drive the stripper through the stripper drive piece. A pouch forming method that adjusts the position of the force transmitted to the pouch. In claim 14,
In step (b), at least five or more connecting rods are provided, the connecting bar has five or more insertion grooves for inserting five or more connecting rods, and the connecting piece includes at least three or more consecutive connecting rods. A pouch forming method that adjusts the position of the force transmitted to the stripper while being placed between the insertion grooves of the connecting bar.

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