KR20040079522A - Apparatus and method for cell polar sheet lamination - Google Patents

Abstract

PURPOSE: An apparatus for layering electrode plates and its method are provided, to allow a cell to be produced continuously, thereby improving the productivity of a lithium ion polymer battery. CONSTITUTION: The method comprises the steps of unwinding a first separator film which are wound in roll-shape; depositing a cathode on the unwound separator film at a certain temperature and a certain pressure; unwinding a second roll-like separator film and covering it on the cathode; preheating the layered one; layering cathodes with at a certain temperature and a certain pressure; peeling off the miler from the separator film on the top of the layered one; depositing the layered one on an anode and heating it at a certain temperature and a certain pressure; covering a miler film on the layered one; pre-pressurizing the layered one at a certain pressure; peeling off the miler from the top and bottom of the pre-pressurized layered one; cutting the layered film by a cell unit; loading the cut cells on a rotating turn table; loading the inverted cell on an another miler film when the turn table is rotated by 180 degree; arranging an another anode on the loaded cell; covering a miler film on the layered one; layering the layered one at a certain temperature and a certain pressure; and removing the miler films from the top and bottom parts of the layered one.

Description

Apparatus and method for cell polar sheet lamination}

The present invention relates to an electrode plate laminating apparatus and a method for forming a cell by a lamination method during a manufacturing process of a lithium ion polymer battery, and specifically, to sandwiching an anode and a cathode between separators supplied in a film roll form. An apparatus and method for continuously manufacturing a cell through a cutting process and the like.

Conventionally, in order to manufacture a lithium-ion polymer battery, a plurality of anodes and cathodes are prepared in a tray in a cut state, and a plurality of separators inserted between the anode and the cathode are similarly placed in a tray in a cut state. It was common to produce cells by laminating one by one in a ready state.

However, in the case of manufacturing the cell as described above, there is a problem in that the productivity is extremely low because only the cells are manufactured one by one.

The present invention has been made in view of the above problems in the prior art, the anode and the cathode by cutting the electrode plate (Al, Cu or Ni) in the form of the electrode plate (Al, Cu or Ni) in the form of winding rolls while the electrode material is coated with It is an object to significantly improve productivity by providing an apparatus and a method for continuously manufacturing a cell through lamination and cutting of a pole plate while supplying a separator inserted between an anode and a cathode in the form of a roll while supplying. .

It is another object of the present invention to provide a dual cell manufacturing system capable of producing two cells at the same time in one production line by supplying the anode and the cathode cut in the cell form at the same time in both production lines as described above.

1 is a side view of a device according to the invention;

2 is a plan view of the device according to the invention.

In order to achieve the above object, according to the present invention, in the anode plate laminating apparatus for continuously producing a polymer battery through the lamination and cutting process while sandwiching a separator between the anode and the cathode for the polymer battery:

A first separator unwinder 11 for releasing the separator film rolled in a rolled form, such as a mylar film, in a tensioned state, and the same separator film rolled up in a rolled form and disposed downstream of the unwinder 11 And a cathode loader for welding and depositing the cathode C at a predetermined pressure and temperature on the separator unwinded from the second separator unwinder 12 and the first separator unwinder 11 for releasing the separator film in a tensioned state. (13), the preheater 14 disposed downstream to preheat the separator film unwound by the second unwinder 12 on the stacked cathode C, and the preheated laminate at a constant pressure and temperature A cathode stacker 10 comprising a cathode stacker 15 for stacking in the stack;

A laminate disposed on the downstream side of the cathode laminate 10 and for removing the mylar M from the separator film on the upper part of the laminate having passed through the cathode laminate, the mylar rewinder 21 and the mylar M stripped. An anode loader 22 for depositing the anode A on water and contacting it at a constant pressure and temperature, to cover the welded anode A by releasing the mylar film in which the mylar film is rolled up in a roll form. Mylar unwinder 23, a preloader 24 for preloading the stack to a predetermined pressure, and two mylar rewinders 25 respectively disposed on the upper and lower portions to peel off the mylar film from the preloaded stack. , A cutter 26 for cutting the mylar peeled laminated film in units of cells, a loader 27 for loading the cut cells, and a rotary turntable 28 on which the cells cut from the loader 27 are loaded. An anode preload unit 20; And

The mylar film loaded with the cells loaded on the turntable while the mylar unwinder 31 and the turntable 28 rotated 180 degrees to release the rolled mylar film in the form of a continuous film. A loader 32 for placing on top, an anode loader 33 for stacking another anode prepared in advance on the loaded cell, and a mylar film unwinder 34 for covering the stack with the mylar film. ), A preheater 35 for preheating the laminate covered with mylar film, a laminator 36 for laminating the preheated laminate at a constant pressure and temperature, and removing the upper and lower mylar films of the laminate having been laminated. It includes; an anode laminated portion 30 consisting of a mylar rewinder 37 disposed in each of the upper and lower transfer lines to

There is provided an electrode plate laminating apparatus, wherein a cell, which is a laminate in which upper and lower mylars are removed, is transferred to a next process.

In the electrode plate stacking apparatus according to the present invention, it is preferable to supply the cathode and the anode from both sides of the film transfer line in the step of supplying the cathode and the anode, which are cut in advance, to the transfer line.

Further, according to the present invention, the center of the film-like laminates respectively transported downstream of the cathode stacker 15 of the cathode stacker 10 and downstream of the preloader 24 of the anode preloader 20 is provided. It is more preferred that the centering means 40 for further provided.

The present invention also provides a method for laminating a positive electrode plate in which a polymer battery is continuously produced through a lamination and a cutting process while sandwiching a separator between a polymer battery anode and a cathode:

1) a first separator unwinding step of linearly unwinding the separator film rolled in a roll form in a tension state;

2) a cathode accumulating step of depositing the cathode (C) in a tentative state at a predetermined pressure and temperature on the uncoated separator film;

3) a second separator unwinding step of releasing and covering the roll-shaped separator film on the stacked cathode;

4) preheating of the laminate to a predetermined temperature;

5) a cathode laminating step for laminating the preheated laminate while pressing at a constant pressure and temperature;

6) Mylar rewinding step of peeling the mylar from the separator film on the top of the laminate;

7) an anode deposition step of placing the anode on the mylar-laminated stack and contacting it at a constant pressure and temperature;

8) a mylar unwinding step of covering a mylar film on the stack in which the anode is stacked;

9) a preloading step of preloading the mylar-covered stack to a constant pressure;

10) the mylar rewinding step of peeling off the mylar film at the upper and lower ends of the laminate in which the preload is completed;

11) a cutting step of cutting the mylar peeled laminated film in units of cells;

12) a cell storing step of placing the cut cells on the rotary turntable;

13) placing the cell on another mylar film with the cell upside down while the turntable is rotated 180 degrees;

14) an anode loading step of placing another anode prepared in advance on the loaded cell;

15) Mylar film unwinding step of covering the mylar film on the laminate loaded anode;

16) laminating step of laminating the mylar film-covered laminate while pressing at a constant pressure and temperature;

17) there is provided a method for laminating a positive electrode plate comprising a; mylar rewinding step of removing the upper and lower mylar film of the laminate is completed.

In the above method according to the present invention, it is preferable to supply two cathodes and two anodes at appropriate positions on both sides of the transfer line.

In addition, in the method according to the invention, it is further preferable to further include a centering step for centering the film-like laminate to be transferred after the step 5) and after the step 9), respectively.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall side view of the apparatus according to the invention, and FIG. 2 is a plan view of FIG.

As shown, the apparatus according to the invention is largely composed of three parts: the cathode stack 10, the anode preload 20 and the anode stack 30. In each part, the cathode C and the anode A are supplied to the transfer line of the apparatus at an appropriate position (see FIG. 2). The cathode and anode are unwound while the cathode and anode films are rolled and rolled, respectively, and cut one by one from the punch and die set, and are loaded into the manufacturing line of the apparatus to be described below at an appropriate position.

On the other hand, in the terms to be described below, the separator (S) is a film inserted between the cathode (C) and the anode (A) basically means a film in which the mylar (M; mylar) is stacked together, The mylar (M) is a film for protecting the cathode and the separator or the anode and the separator from the heat acting during the fabrication process, and is usually made of vinyl. These separators and mylers are common in the field of cells to which the present invention relates. Is omitted.

The cathode stack 10 includes a first separator unwinder 11, an upstream second separator unwinder 12, a cathode loader 13, and a second separator unwinder downstream of the preheater 14. And a stacker 15 on the downstream side of the preheater, and may further include a centering means 40 on the downstream side of the stacker, if necessary.

The separator film is rolled up in the first separator unwinder 11 to unwind the separator film in a tensile state along the production line during the manufacturing process. This unwinder 11 is preferably disposed at the bottom of the manufacturing process line. The second separator unwinder 12 is also rolled up in the same separator film and is disposed downstream of the unwinder 11 to release the separator film in a tensioned state. The cathode C is welded to a predetermined pressure and temperature by the cathode loader 13 on the separator released from the first separator unwinder 11. The pressure for this juncture is preferably 50-80kgf, the temperature is 60-100 ℃.

The separator film unwound from the second unwinder 12 is covered with the cathode C deposited on the separator, and the preheater 14 is placed on the downstream side with the cathode covered with both separators. While passing, the stack is preheated to a temperature of about 200 ° C. The laminate having passed through the preheater 14 is laminated at a constant pressure and temperature by the laminator 15. The pressure is preferably about 1000 kgf, and the temperature is preferably about 150 ° C.

The film in the laminated state is moved along the transfer line, but preferably moves by one pitch corresponding to the width of the cell, and furthermore, a centering means for centering the film stack to be transported downstream of the stacker 15 ( 40) is more preferably arranged.

The anode preloading unit 20 includes a mylar rewinder 21 disposed downstream of the centering means 40, an anode loader 22 disposed downstream of the mylar rewinder 21, and an anode loader 22 downstream. Mylar unwinder 23 arranged at the side, mylar unwinder 23, preloader 24 disposed downstream, mylar rewinder 25 disposed at the upper and lower portions of the downstream of the preloader, e. It consists of the cutter 26 arrange | positioned downstream of the rewinder 25, the cell loader 27 arrange | positioned downstream of the cutter 26, and the turntable 28 arrange | positioned downstream of the cell loader 27, Accordingly, the centering means 40 may be further disposed on the downstream side of the preloader 24 to center the moving film.

The mylar rewinder 21 is for peeling the mylar M from the separator film on the upper part of the stack which has passed through the cathode lamination. Wound on Mylar Rewinder. On the other hand, as shown in the illustration, the peeled laminate film moves to the downstream anode loader 22, and the laminate film is not pulled tightly between the mylar rewinder unit and the anode loader 22, but slightly. It is preferable to be in a drooped state, in order to prevent thermal deformation due to heat when passing through the preheater 14 and the laminator 15.

The anode loader 22 is for depositing the anode A on the laminate from which the mylar M is peeled off and welding it at a constant pressure and temperature. The pressure for welding is 50-80kgf and the temperature is 60-100 ° C. to be. The mylar unwinder 23 is rolled with a mylar film in the form of a roll, and the mylar film is unwound from here to cover the welded anode A. The laminate film covered with the mylar film is pressed at a pressure of about 500 kgf while passing through the preloader 24.

Subsequently, the mylar film is peeled off from the upper and lower ends of the laminate in which the preload is completed by the two mylar rewinders 25 disposed above and below the transfer line. Next, the mylar peeled laminated film is cut in units of cells by the cutter 26. When double feeding the cathode and the anode on both sides of the transfer line, the laminated film is appropriately cut to the cell size in the horizontal and vertical view in plan view. The cut cell is then lifted by the loader 27 and then placed on a rotary turntable 28.

The anode stacking portion 30 formed downstream of the anode preloading portion 20 has the mylar downstream unwinded from the mylar unwinder 31 and the mylar unwinder 31 disposed downstream of the turntable 28. Cell loader 32 disposed on the side, anode loader 33 disposed downstream of the cell loader 32, mylar film unwinder 34 disposed downstream of the anode loader, and disposed downstream thereof. Preheater, a stacker 36 disposed downstream of the stacker, and two mylar rewinders 37 disposed respectively above and below the transfer line on the downstream side of the stacker.

The mylar unwinder 31 releases the mylar continuously in a film form while the mylar film is rolled up in a roll form. The turntable 28 rotates 180 degrees when the cell is loaded, and the downstream cell loader 32 puts the cell on the turntable 28 on the mylar in an upside down state. Meanwhile, another anode prepared in advance is placed on the cell placed on the mylar film by the anode loader 33. The laminate in which the anode is stacked is covered with the mylar film unwound at the mylar film unwinder 34, and the laminate covered with the mylar film is preheated while passing through the preheater 35. About 200 ° C. is appropriate. Next, the pre-heated laminate is pressed at a constant pressure and temperature in the laminator 36, the pressure of about 1000kgf, the temperature of about 180 ℃ is appropriate. Finally, the upper and lower mylar films of the laminate having been laminated are removed while being wound on two mylar rewinders 37 disposed on the upper and lower parts. The completed cell is then transferred to another process.

On the other hand, the present invention also provides a method for laminating a positive electrode plate that continuously produces a polymer battery through a lamination and a cutting process while sandwiching a separator between an anode and a cathode for a polymer battery using the apparatus described above.

The method of laminating the electrode plate according to the present invention is sequentially performed in the following steps.

First, the first separator unwinding step of linearly unwinding the separator film rolled in a roll form in a tension state;

Secondly, a cathode accumulating step of depositing the cathode C on the loosened separator film at a predetermined pressure and temperature, wherein the welding pressure is about 50-80 kgf and the temperature is about 60-100 ° C .;

A third separator unwinding step of releasing and covering the rolled separator film on the stacked cathode;

Fourth, preheating the laminate to a temperature of about 200 ° C .;

Fifth, the cathode laminating step for laminating the pre-heated laminate while pressing under a pressure of about 1000kgf and a temperature of about 150 ℃;

Sixth, the mylar rewinding step of peeling off the mylar from the separator film on the top of the laminate;

Seventh, an anode deposition step of placing the anode on the mylar-laminated stack and contacting at a pressure of about 50-80 kgf and a temperature of about 100 ° C .;

Eighth, a mylar unwinding step of covering a mylar film on the stack having the anode stacked thereon;

Ninth, a preloading step of preloading the mylar-covered stack to a pressure of about 500 kgf;

Next, the mylar rewinding step of peeling off the mylar film at the upper and lower ends of the pre-loaded laminate;

Next, the cutting step of cutting the mylar peeled laminated film in cell units;

Next, the cell storing step of placing the cut cell on the rotary turntable;

Next, placing the cell on another mylar film while the cell is turned over with the turntable rotated 180 degrees;

An anode loading step of placing another anode prepared in advance on the loaded cell;

A mylar film unwinding step of covering the mylar film on the stack loaded with the anode;

A laminating step of laminating the mylar film-covered laminate under pressure at about 1000 kgf and at a temperature of about 180 ° C .;

Finally, the mylar rewinding step of removing the upper and lower mylar film of the laminate is completed.

On the other hand, it is more preferable to supply two cathodes and two anodes at appropriate positions on both sides of the transfer line during the manufacturing process, and to center the film-like laminates to be transferred after the fifth step and the ninth step, respectively. It is most desirable to have more centering steps.

According to the apparatus and method according to the present invention configured as described above, the separator is inserted between the anode and the cathode, and the peeling off of the mylar as necessary is continuously performed along one transfer line, and the anode Since the and cathodes are also continuously supplied along the transfer line, the cell fabrication work is performed continuously rather than discontinuously. Therefore, productivity can be remarkably improved compared with the conventional method or apparatus which supplied the cathode, anode, and separator sheet by sheet.

Claims (6)

In an electrode plate laminating apparatus for continuously producing a polymer battery through a lamination and a cutting process while sandwiching a separator between an anode and a cathode for a polymer battery: A first separator unwinder 11 for releasing the separator film rolled in a rolled form, such as a mylar film, in a tensioned state, and the same separator film rolled up in a rolled form and disposed downstream of the unwinder 11 And a cathode loader for welding and depositing the cathode C at a predetermined pressure and temperature on the separator unwinded from the second separator unwinder 12 and the first separator unwinder 11 for releasing the separator film in a tensioned state. (13), the preheater 14 disposed downstream to preheat the separator film unwound by the second unwinder 12 on the stacked cathode C, and the preheated laminate at a constant pressure and temperature A cathode stacker 10 comprising a cathode stacker 15 for stacking in the stack; A laminate disposed on the downstream side of the cathode laminate 10 and for removing the mylar M from the separator film on the upper part of the laminate having passed through the cathode laminate, the mylar rewinder 21 and the mylar M stripped. An anode loader 22 for depositing the anode A on water and contacting it at a constant pressure and temperature, to cover the welded anode A by releasing the mylar film in which the mylar film is rolled up in a roll form. Mylar unwinder 23, a preloader 24 for preloading the stack to a predetermined pressure, and two mylar rewinders 25 respectively disposed on the upper and lower portions to peel off the mylar film from the preloaded stack. , A cutter 26 for cutting the mylar peeled laminated film in units of cells, a loader 27 for loading the cut cells, and a rotary turntable 28 on which the cells cut from the loader 27 are loaded. An anode preload unit 20; And The mylar film loaded with the cells loaded on the turntable while the mylar unwinder 31 and the turntable 28 rotated 180 degrees to release the rolled mylar film in the form of a continuous film. A loader 32 for placing on top, an anode loader 33 for stacking another anode prepared in advance on the loaded cell, and a mylar film unwinder 34 for covering the stack with the mylar film. ), A preheater 35 for preheating the laminate covered with mylar film, a laminator 36 for laminating the preheated laminate at a constant pressure and temperature, and removing the upper and lower mylar films of the laminate having been laminated. It includes; an anode laminated portion 30 consisting of a mylar rewinder 37 disposed in each of the upper and lower transfer lines to An electrode plate laminating apparatus, characterized in that for transporting the cell which is a laminate in which the upper and lower mylars are removed to the next process. 2. The electrode plate laminating apparatus according to claim 1, wherein the cathode and the anode are respectively supplied from both sides of the film transfer line in the step of supplying the cathode and the anode cut in advance to the transfer line. The film-like laminate according to claim 1 or 2, which is transported downstream of the cathode stacker 15 of the cathode stacker 10 and downstream of the preloader 24 of the anode preload section 20, respectively. A center plate laminating apparatus, characterized in that the centering means 40 for further centering. In a method of laminating a positive electrode plate in which a polymer battery is continuously produced through a lamination and a cutting process while sandwiching a separator between a polymer battery anode and a cathode: 1) a first separator unwinding step of linearly unwinding the separator film rolled in a roll form in a tension state; 2) a cathode accumulating step of depositing the cathode (C) in a tentative state at a predetermined pressure and temperature on the uncoated separator film; 3) a second separator unwinding step of releasing and covering the roll-shaped separator film on the stacked cathode; 4) preheating of the laminate to a predetermined temperature; 5) a cathode laminating step for laminating the preheated laminate while pressing at a constant pressure and temperature; 6) Mylar rewinding step of peeling the mylar from the separator film on the top of the laminate; 7) an anode deposition step of placing the anode on the mylar-laminated stack and contacting it at a constant pressure and temperature; 8) a mylar unwinding step of covering a mylar film on the stack in which the anode is stacked; 9) a preloading step of preloading the mylar-covered stack to a constant pressure; 10) the mylar rewinding step of peeling off the mylar film at the upper and lower ends of the laminate in which the preload is completed; 11) a cutting step of cutting the mylar peeled laminated film in units of cells; 12) a cell storing step of placing the cut cells on the rotary turntable; 13) placing the cell on another mylar film with the cell upside down while the turntable is rotated 180 degrees; 14) an anode loading step of placing another anode prepared in advance on the loaded cell; 15) Mylar film unwinding step of covering the mylar film on the laminate loaded anode; 16) laminating step of laminating the mylar film-covered laminate while pressing at a constant pressure and temperature; 17) a method of laminating a positive electrode plate, comprising: a mylar rewinding step of removing the upper and lower mylar films of the lamination completed. 5. The method of claim 4, wherein two cathodes and two anodes are supplied at appropriate positions on both sides of the transfer line. The method of claim 4 or 5, further comprising a centering step for centering the film-like laminate to be transported after the step 5) and after the step 9), respectively.