KR102404678B1 - Separation film roll feeder for manufacturing cell stack - Google Patents

Abstract

The disclosed separator supply feeder for manufacturing a cell stack includes: an unwinding shaft that grips a core on which a separator is wound in a roll shape, and selectively unwinds the separator; a dancer roll for maintaining the tension of the separator while guiding the separator unwound from the unwinding shaft toward a stack table; a guide roll guiding the separation membrane guided by the dancer roll to the stack table side rotated 45 degrees left and right so as to be folded in a zigzag shape; and a separator gripping and supplying means installed between the dancer roll and the guide roll, wherein the separator gripping and supplying means grips the separator when manufacturing a cell stack, and is optionally folded in a zigzag form on the stack table The separator is supplied to a length corresponding to the folding length of the separator, and when the cell stack is manufactured, the grip on the separator is released to discharge the manufactured cell stack.

Description

Separation membrane supply feeder for cell stack manufacturing {SEPARATION FILM ROLL FEEDER FOR MANUFACTURING CELL STACK}

The present invention (Disclosure) relates to a separation membrane supply feeder for manufacturing a cell stack, and more particularly, a separation membrane supply feeder for manufacturing a cell stack that can maintain constant the tension of a separation membrane folded in a zigzag shape by the operation of a stack table is about

Herein, background information related to the present invention is provided, which does not necessarily mean known art (This section provides background information related to the present disclosure which is not necessarily prior art).

In general, a chemical cell is a battery composed of a pair of electrodes and an electrolyte of a positive electrode plate and a negative electrode plate, and the amount of energy that can be stored varies according to materials constituting the electrode and the electrolyte. These chemical batteries are divided into primary batteries used only for one-time discharge and secondary batteries that can be reused through repeated charging and discharging.

Secondary batteries are being applied in various technical fields throughout the industry due to the above-described repetitive charging and discharging.

As anyone knows, secondary batteries are formed in a form in which a positive plate, a separator, and a negative plate are sequentially stacked and dipped in an electrolyte solution. In addition, the method of manufacturing the internal cell stack of the secondary battery is largely classified into two.

That is, in the case of a small secondary battery, a method of arranging a negative plate and a positive plate on a separator and manufacturing it in the form of a jelly-roll by winding it is widely used, and a medium-to-large secondary battery having more electric capacity In the case of , a method of stacking a negative plate, a positive plate, and a separator in an appropriate order is widely used.

In addition, there are various methods of manufacturing the internal cell stack of the secondary battery in a stacked manner, but among them, in the Z-stacking method, the separator is formed in a zigzag folded form, and the negative plate and the positive plate are alternated between the separators. It is laminated in an inserted form.

A representative example of a device for manufacturing a cell stack in the Z-stacking form is 'Korea Patent Publication No. 10-2120403 (cell stack manufacturing device for secondary batteries)', which has been patented and patented by the present applicant. In 'Korea Patent Publication No. 10-2120403', the separator is folded in a zigzag shape by a stack table that rotates 45 degrees left and right, and negative and positive plates are alternately inserted between the folded separators in a zigzag shape. to produce a cell stack.

On the other hand, the separator during cell stack manufacturing is a secondary battery electrode film laminating device with improved separator skew correction function disclosed in 'Korea Patent Publication No. 10-2192738', which has been patented and patented by the present applicant. Supplied as a stack table.

However, in the aforementioned 'Korea Patent Publication No. 10-2192738', the tension of the separator is not constant because the tension of the separator supplied to the stack table is controlled only by the dancer roll in pendulum motion.

That is, when the cell stack is manufactured, the separator supplied to the stack table rotates left and right along the stack table under the condition that it is fixed to the stack table together with the negative plate or the positive plate by a mandrel, in which case the separator is pulled in the rotation direction of the stack table, Since the dancer roll moves in a direction opposite to the tension control direction by the pulling separation membrane, there has been a limit in controlling the tension of the separation membrane only with the dancer roll.

In addition, because the separator is supplied to the stack table side for a longer than a preset length due to the above-described problem, there is another problem in that the cell stack collapses during cell stack manufacturing.

Korean Patent Publication No. 10-2120403. Korean Patent Publication No. 10-2192738.

An object of the present invention (Disclosure) is to provide a separator supply feeder for manufacturing a cell stack that can hold the separator and maintain constant tension of the separator folded in a zigzag form on a stack table.

An object of the present invention (Disclosure) is to provide a separator supply feeder for manufacturing a cell stack capable of supplying a separator to the stack table side with a length corresponding to the length of the separator folded in a zigzag form on the stack table when the stack table is rotated.

In addition, the problem to be solved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. it could be

Herein, a general summary of the present invention is provided, which should not be construed as limiting the scope of the present invention (This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, the separator supply feeder for cell stack manufacturing according to any one aspect of various aspects describing the present invention holds the core wound in the form of a roll of the separator, and optionally the separator unwinding shaft for unwinding; a dancer roll for maintaining the tension of the separator while guiding the separator unwound from the unwinding shaft toward a stack table; a guide roll guiding the separation membrane guided by the dancer roll to the stack table side rotated 45 degrees left and right so as to be folded in a zigzag shape; and a separator gripping and supplying means installed between the dancer roll and the guide roll, wherein the separator gripping and supplying means grips the separator when manufacturing a cell stack, and is optionally folded in a zigzag form on the stack table The separation membrane may be supplied to a length corresponding to the folding length of the separation membrane, and gripping of the separation membrane may be released to discharge the manufactured cell stack upon completion of manufacturing the cell stack.

In the separator supply feeder for manufacturing a cell stack according to an aspect of the present invention, the separator gripping and supplying means includes: a driving roll; and a first gripping roll and a second gripping roll installed on the upper side and lower side of the driving roll; wherein, when the cell stack is manufactured, the first gripping roll and the second gripping roll are in close contact with the driving roll The separation membrane is gripped together with the driving roll, and when the cell stack is manufactured, the first and second gripping rolls may be spaced apart from the driving roll so that the separation membrane is guided to a cell stack discharge position.

In the separator supply feeder for manufacturing a cell stack according to an aspect of the present invention, the driving roll extends horizontally along the width direction of the separator, and both ends are rotatably supported by a bracket, and the outer peripheral surface of the driving roll On the upper part, the separation membrane guided from the dancer roll via the first gripping roll is spread, and the separation membrane spanned over the driving roll is guided to the guide roll side via the second gripping roll, and one end of the driving roll is It is connected to a servomotor, and the servomotor rotates the driving roll to supply the separator to the stack table side.

In the separator supply feeder for manufacturing a cell stack according to an aspect of the present invention, the servomotor may supply the separator when the separator is fixed to the stack table after the stack table completes left or right rotation.

In the separator supply feeder for manufacturing a cell stack according to an aspect of the present invention, the first gripper roll and the second gripper roll extend horizontally along the width direction of the separator, and to the lower side of the first gripper roll The separation membrane guided from the dancer roll side is spanned, the separation membrane spanned over the first gripping roll is guided toward the upper side of the driving roll, and guided from the lower side of the driving roll toward the upper side of the second gripping roll. The separation membrane that is used may be draped over, and the separation membrane spanned over the second holding roll may be guided toward the guide roll.

In the separation membrane supply feeder for cell stack manufacturing according to an aspect of the present invention, the cell stack separation membrane supply feeder is installed between the second holding roll and the guide roll, and 45 degrees left and right by the stack table Further comprising; a tension control roll for maintaining the tension of the separation membrane pulled while being guided obliquely, wherein the tension control roll elastically pressurizes the separation membrane to impart tension to the separation membrane.

According to the present invention, it is possible to constantly maintain the tension of the separator folded in a zigzag form on the stack table, thereby preventing the cell stack from collapsing as in the prior art when manufacturing the cell stack. be able to

1 is a view schematically showing a separator supply feeder for manufacturing a cell stack according to the present invention.
Figure 2 is an enlarged view of the separator holding and supplying means shown in Figure 1;
3 to 6 are views schematically showing the operating state of the separator holding and supplying means shown in FIG.

Hereinafter, an embodiment in which the separator supply feeder for manufacturing a cell stack according to the present invention is implemented will be described in detail with reference to the drawings.

However, it cannot be said that the intrinsic technical idea of the present invention is limited by the embodiments described below, and the following by those skilled in the art based on the intrinsic technical idea of the present invention It is revealed that the range that can be easily suggested as a method of substitution or modification of the embodiments described in is included.

In addition, since the terms used below are selected for convenience of description, in grasping the intrinsic technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted as meanings consistent with the technical spirit of the present invention. it should be

Among the accompanying drawings, FIG. 1 is a view schematically showing a separator supply feeder for manufacturing a cell stack according to the present invention.

1, the separator supply feeder 100 for manufacturing a cell stack according to the present invention holds the core (C) on which the separator (S) is wound in the form of a roll and selectively unwinds the separator (S). The shaft 110 and the dancer roll 120 and the dancer roll 120 for maintaining the tension of the separation membrane S while guiding the separation membrane S unwound from the unwinding shaft 110 toward the stack table T. It includes a guide roll 130 for guiding the separation membrane (S) toward the stack table (T).

Here, the unwinding shaft 110, the dancer roll 120, and the guide roll 130 are respectively a holder, a dancer and a supplier disclosed in 'Korea Patent Publication No. 10-2192738' mentioned in 'Technical Background of the Invention'. As the same as the roller, detailed description thereof will be omitted in the present invention.

In addition, the stack table T is a stack table constituting the 'cell stack manufacturing apparatus for secondary batteries' disclosed in 'Korea Patent Publication No. 10-2120403', and a separator (S) supplied by the operation of the stack table (T). is folded in a zigzag shape. And between the separators (S) folded in a zigzag shape, a negative electrode plate (N; see FIGS. 4 to 6) and a positive plate (P; FIGS. 4 to 6) by a negative plate transfer picker (not shown) and a positive plate transfer picker (not shown) 6) are stacked in such a way that they are alternately inserted, so that one cell stack is manufactured.

On the other hand, the cell stack separator supply feeder 100 according to the present invention is different from 'Korea Patent Publication No. 10-2192738', a separator holding and supplying means 140 installed between the dancer roll 120 and the guide roll 130 . ) is further included.

Among the accompanying drawings, FIGS. 2 to 6 are views schematically illustrating a separator holding and supplying means.

1 to 6 , the separator gripping and supplying means 140 includes a driving roll 142 and first and second gripping rolls 148a and 148b provided as a pair.

First, the driving roll 142 grips the separation membrane S supplied to the stack table T together with the first and second gripping rolls 148a and 148b. In addition, the driving roll 142 supplies the separation membrane S gripped together with the first and second gripping rolls 148a and 148b to the stack table T side.

The driving roll 142 extends horizontally along the width direction of the separation membrane S as shown, and both ends of the driving roll 142 are rotatably supported by a bracket (not shown).

On the outer peripheral surface of the driving roll 142, the separation membrane S guided from the dancer roll 120 via the first holding roll 148a is spread, and the separation membrane S spanned over the driving roll 142 is the second It is guided to the guide roll 130 side via the grip roll 148b.

On the other hand, the servomotor 146 is connected to one end of the driving roll 142 through a normal coupling.

In this way, the driving roll 142 connected to the servo motor 146 rotates by receiving rotational driving force from the servo motor 146 , and the driving roll 142 is held together with the first and second gripping rolls 148a and 148b. One separation membrane (S) is supplied to the stack table (T) side through the guide roll 130 in a predetermined length.

Here, the servomotor 146 is a negative electrode plate (N) or a positive electrode plate (P) by the mandrel after the separator (S) fixed to the stack table (T) is guided at an angle of 45 degrees to the left and right by the stack table (T) When fixed to the stack table (T) together with the rotation of the driving roll 142 at the same time to supply the separation membrane (S) to the stack table (T) side with a predetermined length.

In other words, the servomotor 146 rotates the driving roll 142 in advance before rotating in the opposite direction after the stack table T completes left or right rotation to move the separation membrane S to the stack table T. supplied to the side.

Preferably, the preset length of the separator S is the same as the length of the separator S folded in the stack table T, and the preset length may vary depending on the size of the cell stack (refer to FIG. 6 ) to be manufactured. have.

The first and second gripping rolls 148a and 148b grip the separation membrane S supplied to the stack table T side together with the driving roll 142 . In addition, the first and second gripping rolls 148a and 148b guide the separation membrane S when the separation membrane S is supplied by the operation of the driving roll 142 .

The first and second gripping rolls 148a and 148b extend horizontally along the width direction of the separation membrane S like the driving roll 142, and the first and second gripping rolls 148a and 148b are As such, they are freely rotatably installed on the upper side and the lower side of the driving roll 142 , respectively.

The separation membrane S guided from the dancer roll 120 is spread over the lower side of the first gripping roll 148a installed in this way, and the separator S spanned over the first gripping roll 148a is the driving roll 142 . guided to the upper side. And the separation membrane S guided from the lower side of the driving roll 142 is spread over the upper side of the second holding roll 148b, and the separation membrane S spanned over the second holding roll 148b is the guide roll 130 guided to the side

On the other hand, the first and second holding rolls 148a and 148b are in close contact with the driving roll 142 when manufacturing the cell stack to hold the separation membrane S together with the driving roll 142 (see FIGS. 3 to 5), When the cell stack manufacturing is completed, the separation membrane S is installed to be spaced apart from the driving roll 142 so that the separation membrane S is guided to the cell stack discharge position by a cell stack discharge means (not shown) and cut (see FIG. 6 ).

In this way, since the first and second holding rolls 148a and 148b press and hold the separation membrane S toward the driving roll 142 when manufacturing the cell stack, the driving roll 142 can supply the separation membrane S with a predetermined length. Also, it is possible to constantly maintain the tension of the separation membrane (S) folded in a zigzag form by the stack table (T).

And when the separation membrane S is cut at the cell stack discharge position by the stack discharging means, the first and second gripping rolls 148a and 148b are in close contact with the driving roll 142 to grip the separation membrane S.

Here, the first and second gripping rolls 148a and 148b may be connected to a conventional pneumatic cylinder (not shown) and the like to be in close contact with the drive roll 142 or may be spaced apart from the drive roll 142, and the pneumatic cylinder and Since the connection relationship between the first and second gripping rolls 148a and 148b is a known technique, a detailed description thereof will be omitted.

That is, when the front end of the separation membrane S is adsorbed to the stack table T, the servomotor 146 rotates the driving roll 142 to supply the separation membrane S with a preset length to the stack table T side and , when the supply of the separation membrane S to a predetermined length is completed, the servomotor 146 stops the rotation of the driving roll 142 (refer to FIG. 3 ), whereby the separation membrane S is formed by the first and second gripping rolls A gripped state is maintained between the 148a and 148b and the driving roll 142 .

And as described above, the separator S is supplied to the stack table T with a predetermined length and at the same time the stack table T rotates 45 degrees to the left, whereby the separator S moves along the stack table T. It is guided at an angle of 45 degrees to the left, and at the same time the separation membrane S is supplied (see FIG. 4 ).

At this time, since the first and second gripping rolls 148a and 148b maintain a state of gripping the separator S together with the driving roll 142, the separator S maintains a constant tension and holds the stack table T. It is guided at an incline of 45 degrees to the left.

The separator S guided to the left is loaded with the negative plate N by a negative plate transfer picker (not shown), and the negative plate N is fixed to the stack table T together with the separator S by a mandrel. .

On the other hand, as described above, when the negative electrode plate N is loaded on the separator S that is guided at an angle of 45 degrees to the left and fixed by the mandrel, at the same time, the servomotor 146 rotates the driving roll 142 again to rotate the separator ( S) is supplied to the stack table T at a preset length, and when the separation membrane S is supplied to the preset length, the servo motor 146 stops the rotation of the driving roll 142 (refer to FIG. 4). , whereby the separation membrane S is maintained in a gripped state between the first and second gripping rolls 148a and 148b and the driving roll 142 .

And as described above, when the separator S is supplied with a predetermined length, the stack table T rotates 45 degrees to the right, whereby the separator S covers the negative electrode plate N while holding the stack table T. It is guided at an angle of 45 degrees to the right along the line (refer to FIG. 5).

At this time, similarly, since the first and second gripping rolls 148a and 148b maintain a state of gripping the separator S together with the driving roll 142, the separator S holds the negative electrode plate N while maintaining a constant tension. covered and folded.

The positive electrode plate P is loaded onto the separator S guided to the right in this way by a positive plate transfer picker (not shown), and the positive electrode plate P is placed on the stack table T together with the separator S by another mandrel. At the same time, the mandrel fixing the negative electrode plate N to the stack table T retreats, and the servo motor 146 rotates the driving roll 142 to rotate the separator S to a predetermined length on the stack table ( T) side, and when the separation membrane S is supplied to a preset length, the servomotor 146 stops the rotation of the driving roll 142 (see FIG. 5).

In this way, since the separator S is folded in a zigzag shape while maintaining a constant tension, it is possible to prevent the cell stack from collapsing as in the prior art during stack manufacturing.

On the other hand, the cell stack separation membrane supply feeder 100 according to the present invention is guided by the stack table (T) to the left and right at an angle of 45 degrees and a tension control roll 164 that prevents wrinkles from occurring in the pulled separation membrane (S). further includes

The tension control roll 164 extends horizontally along the width direction of the separation membrane S like the driving roll 142, and is freely rotatable between the second gripping roll 148b and the guide roll 130 as shown. is installed At this time, the tension control roll 164 elastically presses the separation membrane S in a direction perpendicular to the tension direction of the separation membrane S guided toward the guide roll 130 via the second holding roll 148b. The tension of the separation membrane (S) is maintained constant.

That is, when the separation membrane (S) is pulled during cell stack manufacturing, the tension control roll 164 moves in a direction opposite to the direction of pressing the separation membrane (S) while maintaining a constant tension of the separation membrane (S), and the separation membrane ( When S) is loosened, the tension control roll 164 maintains the tension of the separation membrane S while moving in the pressing direction of the separation membrane S.

Here, the tension control roll 164 can be connected to a conventional pneumatic cylinder (not shown) and the like to elastically press the separator S, and the connection relationship between the pneumatic cylinder and the tension roll 164 is a known technique. Detailed description will be omitted.

The separator supply feeder 100 for manufacturing a cell stack according to the present invention formed as described above makes it possible to constantly maintain the tension of the separator S, which is folded in a zigzag form on the stack table T, and, thereby, when manufacturing the cell stack. It makes it possible to prevent in advance from collapsing as in the prior art.

Claims (6)

an unwinding shaft holding the core wound in the form of a roll of the separator and selectively unwinding the separator;
a dancer roll for maintaining the tension of the separator while guiding the separator unwound from the unwinding shaft toward a stack table;
a guide roll for guiding the separation membrane guided by the dancer roll toward the stack table rotated 45 degrees left and right to fold it in a zigzag shape; and
It includes; a separator holding and supplying means installed between the dancer roll and the guide roll;
The separation membrane holding and supply means,
drive roll; and
Including; a first gripping roll and a second gripping roll installed on the upper side and the lower side of the driving roll;
When manufacturing the cell stack, the first holding roll and the second holding roll are in close contact with the driving roll to hold the separation film together with the driving roll and optionally together with the driving roll rotated by a servomotor on the stack table supplying the separation membrane to a length corresponding to the folding length of the separation membrane folded in a zigzag form,
When the cell stack is manufactured, the first and second grip rolls are spaced apart from the driving roll so that the separator is guided to a cell stack discharge position,
The servomotor is connected to one end of the driving roll, and when the separator is fixed to the stack table after the stack table completes left or right rotation, the separator supply feeder for manufacturing a cell stack supplies the separator.
delete The method according to claim 1,
The driving roll is
It extends horizontally along the width direction of the separator, and both ends are rotatably supported by a bracket,
On the outer circumferential surface of the driving roll, the separation membrane guided through the first gripping roll in the dancer roll is spread, and the separation membrane spanning the driving roll is guided to the guide roll side via the second gripping roll. Cell stack Membrane feeder for manufacturing.
delete 4. The method according to claim 3,
The first grip roll and the second grip roll extend horizontally along the width direction of the separation membrane,
The separation membrane guided from the dancer roll is spread over the lower side of the first holding roll, the separation membrane spanned over the first holding roll is guided toward the upper side of the driving roll, and the upper side of the second holding roll Separation membrane supply feeder for manufacturing a cell stack in which the separation membrane guided from the lower side of the driving roll is spread, and the separation membrane spanned over the second gripping roll is guided toward the guide roll.
The method according to claim 1,
The cell stack separator supply feeder,
A tension control roll installed between the second holding roll and the guide roll to maintain the tension of the separation membrane pulled while being guided at an angle of 45 degrees to the left and right by the stack table;
The tension control roll is a separator supply feeder for producing a cell stack that elastically pressurizes the separator to apply tension to the separator.

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