KR101535420B1 - Method for manufacturing cell-roll and cell-roll - Google Patents

Abstract

The present invention relates to a process for preparing a separator, comprising: preparing a separator for preparing a separator; An electrode positioning step in which first arrangement areas where first electrodes are arranged on one surface of the central separation membrane and second arrangement areas where second electrodes are arranged on the other surface of the central separation membrane are formed; A first electrode disposing step of disposing the first electrodes in the first disposing areas except the first disposing area after the foremost end of the central separation membrane among the first disposing areas; A second electrode disposing step of disposing second electrodes in the second disposing areas other than the rearmost end of the central separation membrane and the second disposing area next to the rearmost end; An outer separator arranging step of preparing an outer separator and arranging the outer separator so as to cover either the first electrode or the second electrode; And a separation membrane winding step of winding the central separation membrane and the outer separation membrane so that the forefront ends of the central separation membrane and the outer separation membrane are centered.

Description

METHOD FOR MANUFACTURING CELL-ROLL AND CELL-ROLL BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method of manufacturing a battery roll, in which a conventional jelly-roll structure is a structure in which electrodes and a separator are wound without cutting, and a sheet battery roll of the present invention is a structure in which a separator film Manufacture of a battery roll capable of preventing short-circuiting at the central portion of the cell structure, bending the cell structure, preventing over-adhesion due to heating, and achieving high productivity per unit time with the advantage of a jelly- And a battery roll.

2. Description of the Related Art [0002] In general, a secondary battery is a battery capable of charging and discharging unlike a primary battery which can not be charged, and is widely used in high-tech electronic devices such as a cellular phone, a notebook computer, and a camcorder.

Particularly, the lithium secondary battery has an operating voltage of 3.6 V, which is three times higher than nickel-cadmium batteries and nickel-hydrogen batteries, which are widely used as power sources for portable electronic equipment, and has been rapidly growing in terms of high energy density per unit weight to be.

These lithium secondary batteries mainly use lithium calculated cargo as a cathode active material and carbon materials as an anode active material. Generally, a battery using a liquid electrolyte is referred to as a lithium ion battery, and a battery using a polymer electrolyte is referred to as a lithium polymer battery, which is classified as a liquid electrolyte cell and a polymer electrolyte cell, depending on the type of electrolyte. Further, the lithium secondary battery is manufactured in various shapes. Typical shapes include a cylindrical shape, a square shape, and a pouch shape.

Korean Patent Laid-Open No. 10-2001-0082058 (published on Aug. 29, 2001) discloses a technique relating to an electrochemical device having an improved capacity density including an electrochemical cell stacked in plural.

The electrochemical cells in the electrochemical device are stacked in a basic unit of a pull cell or a bi-cell, and a separation film is interposed in the overlapping portion of each pull cell.

Conventionally, since two separators are provided between the three electrodes, the structural stiffness is increased and there is a problem that it is broken when bent.

Further, since the position of the intermediate electrode of the bi-cell can not be precisely checked, there is a problem that when the alignment position is changed, the characteristics of the cell deteriorate.

In addition, since the structure for attaching three electrodes and two separators is formed in manufacturing a bi-cell, a high temperature and a high roller pressure are required to attach the center electrode. Therefore, there is a problem that the electrolyte is completely impregnated due to adhesion, and the cell characteristics are deteriorated.

Further, even in the case of employing a method of laminating electrodes in a zigzag type separating membrane, there is a problem that the productivity and installation site of the apparatus and the cost are increased, and the sheet type electrode can move within the zigzag type battery roll There is a problem in that the process equipment becomes complicated due to the reason that the jig for fixing the electrodes of the electrodes is used.

It is an object of the present invention to provide a jelly-bean cell structure in which a cell structure to be wound is capable of preventing electrical short-circuiting between different electrodes at a central portion in advance, The present invention provides a battery roll manufacturing method and a battery roll having high productivity per unit time while having the advantages of a roll.

Another object of the present invention is to prevent over-adhesion of the separator and the electrode by heating at only a relatively low temperature and a low roller pressure as compared with the conventional structure in which only the upper and lower outer electrodes are heated up to the center electrode And a battery roll in which a pair of separators to be wound are also formed, and one of them is provided in a free state so that a certain degree of bending is possible.

In a preferred aspect, the present invention provides a process for preparing a membrane, comprising: preparing a central membrane; An electrode positioning step in which first arrangement areas where first electrodes are arranged on one surface of the central separation membrane and second arrangement areas where second electrodes are arranged on the other surface of the central separation membrane are formed; A first electrode disposing step of disposing the first electrodes in the first disposing areas except the first disposing area after the foremost end of the central separation membrane among the first disposing areas; A second electrode disposing step of disposing second electrodes in the second disposing areas other than the rearmost end of the central separation membrane and the second disposition area of the last end of the rearmost end; An outer separator arranging step of preparing an outer separator and arranging the outer separator so as to cover either the first electrode or the second electrode; And a separation membrane winding step of winding the central separation membrane and the outer separation membrane so that the forefront ends of the central separation membrane and the outer separation membrane are centered.

Preferably, the first arrangement areas and the second arrangement areas are set to coincide with each other. It is preferable that the first electrodes are used as a cathode and the second electrodes are used as an anode.

The first separator is disposed between the first separator and the first separator, and the second separator is disposed between the first separator and the first separator, It is preferable to set the outermost winding portion to the second placement region of the last stage and the last stage of the last stage.

The separator winding step may include winding the first and second electrodes disposed on the foremost end of the central separation membrane and the first and second electrodes disposed on the foremost end of the central separation membrane, And the first and second electrodes are disposed on the other side so that the winding start part is formed and the first and second electrodes are sequentially wound around the winding starting part along the outer side It is preferable that the electrode winding portion is formed and the outermost portion of the outer wrapping portion is formed by winding the second electrode at both sides of the electrode winding portion.

The length of the frontmost end of the central separation membrane and the length of the front end of the outer separation membrane is extended from the first and second electrodes located at the foremost end of the central separation membrane to a predetermined length to form an extension, Bending is preferred.

In addition, the first electrode disposing step and the second electrode disposing step may be performed simultaneously. It is preferable that the arrangement of the first electrodes and the arrangement of the second electrodes are performed by a thermal adhesion method.

In another aspect, the present invention provides a method of fabricating a semiconductor device, comprising: a center separator that is sequentially wound around a center; A central electrode part attached to the central part of the central separation membrane and having a first electrode and a second electrode which are different electrodes attached to both sides of the central separation membrane, A winding starting portion having an outer electrode portion constituting an electrode; An electrode winding unit formed by winding a first electrode and a second electrode, which are different electrodes along an outer side of the winding starting part, so as to be sequentially arranged in a row; A winding outermost portion formed by winding so that first electrodes are disposed on both sides of the electrode winding portion wound on the outer side of the winding start portion; And an outer separator positioned between the winding central separator and wound around the center separator.
The second electrode is an anode, and the first electrode is a cathode. An extension part is formed by extending the front end of the central separation membrane and the front end of the outer separation membrane to a predetermined length from the first and second electrodes located at the foremost end of the central separation membrane, It is preferable to be bent.

delete

The present invention has the effect of preventing the occurrence of electrical short between the different electrodes at the central portion of the cell structure to be wound in advance.

In addition, the sheet battery roll of the present invention has the advantage of jelly-roll formed in a sheet shape, and has the effect of increasing the productivity per unit time, by winding the separator film which is not cut by cutting the electrode.

In addition, the present invention can prevent over-adhesion of the separator and the electrode by heating at a relatively low temperature and a low roller pressure as compared with the conventional structure in which only the upper and lower outer electrodes are heated to one center electrode, It is possible to provide a pair of separation membranes to be wound and to provide one of them in a free state so as to be able to bend to some extent.

1 is a flow chart showing a method of manufacturing a battery roll of the present invention.
FIG. 2 is a view showing the first and second arrangement regions set in the central separation membrane according to the present invention.
3 is a view showing a state in which first electrodes are arranged in a central separation membrane according to the present invention.
4A is a view showing a state in which the second electrodes are disposed in the central separation membrane according to the present invention.
FIG. 4B is a plan view showing a state in which the second electrodes are arranged in the central separation membrane of FIG. 4A. FIG.
4C is a plan view showing an example in which the first and second electrodes are protruded along opposite directions in the central separation membrane.
5 is a view showing that an outer separator is disposed under the central separator.
6 is a view showing that a winding start portion is formed.
7 is a view showing a winding start portion, an electrode winding portion, and an outermost winding portion.
8 is a view showing that an extension portion is further formed at the winding start portion according to the present invention.

Hereinafter, a method of manufacturing a battery roll and a battery roll of the present invention will be described with reference to the accompanying drawings. In the description of the present invention, the structure of the battery roll of the present invention will be described by way of a battery roll manufacturing method.

1 is a flow chart showing a method of manufacturing a battery roll of the present invention.

The method of manufacturing the battery roll of the present invention is performed through the steps of preparing the central separation membrane, setting the electrode position, first electrode placement step, second electrode placement step, outer separation membrane placement step, and membrane winding step.

Prepare the center separator

A central separation membrane 100 having a predetermined width and length is prepared. In this preparation step, the outer separator 200 can be prepared at the same time. The width and length of the outer separator 200 are also the same as the size of the central separator 100.

Electrode positioning step

FIG. 2 is a view showing first and second arrangement regions set in the central separation membrane 100 according to the present invention. Referring to FIG. 2, an arrangement region of the electrodes 10 and 20 is set in the prepared central separator 100.

The first arrangement regions in which the first electrodes 10 are disposed on the upper surface of the central separation membrane 100 are set.

The first arrangement regions are set along the longitudinal direction of the central separation membrane 100, and they have the same area. Here, as described later, a predetermined length between the first placement regions is a folded portion when wound.

Second arrangement regions in which the second electrodes 20 are disposed on the lower surface of the central separation membrane 100 are set.

The second arrangement regions are set along the longitudinal direction of the central separation membrane, and they preferably have the same area. Here, as described later, a predetermined length between the second arrangement regions is a folded portion when wound.

The first electrode arrangement step

3 is a view showing a state in which first electrodes are arranged in a central separation membrane according to the present invention. Referring to FIG. 3, the first electrodes 10 are prepared. The first electrodes 10 may be a negative electrode.

The first electrodes 10 are arranged in the first arrangement areas set on the upper surface of the central separation membrane 100, respectively. The arrangement method uses a heat-bonding method.

Here, the first arrangement regions are referred to as the first arrangement regions 1, 2, ..., N from the foremost end of the central separation membrane 100.

In the present invention, the first electrode (10) is not disposed in the first arrangement region (2).

The second electrode arrangement step

4A and 4B are views showing a state in which the second electrodes are arranged in the central separation membrane according to the present invention. 4A and 4B, the second electrodes 20 are prepared. The second electrodes 20 may be an anode.

The second electrodes 20 are arranged in the second arrangement regions set on the lower surface of the central separation membrane 100, respectively. The arrangement method uses a heat-bonding method.

Here, the second arrangement areas are referred to as the first arrangement area, the second arrangement area, ..., and the Nth arrangement area from the foremost end of the central separation membrane 100.

The present invention is characterized in that the second electrode 20 is not disposed in the second arrangement area of N-th and N-1th.

The first electrode disposing step and the second electrode disposing step described above in the present invention may be performed at the same time.

In particular, the first and second electrodes may protrude in the same direction.

Of course, they may be arranged to protrude in the opposite directions as shown in FIG. 4C.

The outer membrane separation step

5 is a view showing that an outer separator is disposed under the central separator. 5, after the first and second electrodes 10 and 20 are disposed on the central separator 100, the outer separator 200 is disposed on the lower surface of the central separator 100 do.

Accordingly, in the present invention, a pair of separation membranes 100 and 200 are used, one of which is provided with electrodes 10 and 20 and the other of which serves as a cover.

Membrane winding stage

The winding start portion 1 is set from the first placement region following the foremost end of the central separation membrane 100 and the second placement region positioned from the first placement region to the foremost end of the central separation membrane 100.

And is set as the outermost winding portion (3) to the rearmost end of the central separation membrane (100) and the next second arrangement region of the rearmost end.

That is, the first and second placement regions 1 and 2 are set as the winding start portion 1 and the first and second placement regions N and N-1 are set as the winding outermost portion 3, respectively.

6 is a view showing that a winding start portion is formed.

6, the first and second electrodes 10 and 20 disposed at the foremost end of the central separation membrane 100 and the first and second electrodes 10 and 20 disposed at the forefront of the central separation membrane 100 The first and second electrodes 20 and 20 are positioned on one side and the other side of the first and second electrodes 10 and 20 so that the winding start portion 1 is formed do.

7 is a view showing a winding start portion, an electrode winding portion, and an outermost winding portion.

Referring to FIG. 7, the electrode winding unit 2 is formed by winding the first and second electrodes 10 and 20 along the outer side of the winding start unit 1 so that the first and second electrodes 10 and 20 are sequentially arranged .

And the outermost peripheral portion 3 is formed by winding the first electrodes 10 on both sides of the electrode winding portion 2.

8 is a view showing that an extension portion is further formed at the winding start portion according to the present invention.

8, the frontmost end of the central separator 100 and the most distal end of the outer separator 200 are connected to the first and second electrodes 10 and 20 located at the forefront of the central separator 100, 20 by a predetermined length to form the extended portion 300.

And may be formed by bending the extending portion 300 along the extending direction.

Referring to FIG. 7, the battery roll manufactured according to the above-described manufacturing method includes a central separator 100, a winding start portion 1, an electrode winding portion 2, a winding outermost portion 3, And an outer separator 200.

The center separator 100 is sequentially wound around the center.

The winding starting portion 1 includes a central electrode portion A attached to the center of the central separator 100 and having different electrodes 10 and 20 attached to both sides of the central separator 100, And an outer electrode part B attached to the separator 100 and positioned at one side of the center electrode part A and forming one electrode 20.

The electrode winding part 2 is attached to the central separator 100 to be wound and sequentially disposed on both sides of the winding start part 1 to form a pair of different electrodes 10 and 20. The electrode winding portion 2 may be extended longer than that shown in Fig. 7 as needed, so that a greater number of different groups of electrodes 10, 20 can be formed.

The pair of winding outermost portions 3 are formed of another electrode 10 attached to the central separator 100 wound on the winding portion 2 and disposed at both outermost sides of the electrode winding portion 2. 7, the center separator 100 and the outer separator 200 are extended to the outside of the other electrode 10 disposed on both outermost sides of the outermost winding portion 3, It may surround.

The outer separator 200 is positioned between the winding central separator 100 and is wound along the center separator 100.

The length of the foremost end of the central separator 100 and the length of the foremost end of the outer separator 200 are set to be equal to or longer than the length of the first and second electrodes 10, To form an extended portion 300.

In addition, the extension 300 may be bent along the opposite extension direction.

Since the battery roll manufactured through the above-described method for manufacturing a battery roll and the method of the present invention can improve productivity and is in the form of a roll in which separation membranes with electrodes are wound, it is easy to handle during the packaging process after the cell fabrication

In addition, the two electrodes can be inspected from above and below, which is advantageous in product quality control.

When the electrode is attached to the separation membrane, it is unnecessary to heat up to the electrode located at the center in the state where the multiple electrodes are overlapped. Since only one electrode is heated at each of the upper and lower edges, It may be heated by the roller pressure to prevent over-adhesion.

Further, one separator (central separator) is attached between two electrodes, and the other one (outer separator) is in a free state, which is advantageous in that it is relatively easy to bend.

As described above, the battery roll manufacturing method and the battery roll according to the present invention have been described in detail. However, it is apparent that various modifications are possible within the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

1: winding start part 2: electrode winding part
3: Winding outermost part 10: First electrode
20: second electrode 100:
200: outer separator 300: extension

Claims (11)

A central membrane preparation step for preparing a central membrane;
A first positioning area in which first electrodes are disposed on one surface of the central separation membrane and a second positioning area in which second electrodes are disposed on a second surface of the central separation membrane;
A first electrode arrangement step of arranging the first electrodes in the first arrangement areas except the first arrangement area after the foremost end of the central separation membrane among the first arrangement areas;
A second electrode placement step of arranging the second electrodes in the second placement areas except for the rearmost end of the central separation membrane and the second placement area of the last end of the rearmost end;
An outer separator arranging step of preparing an outer separator and arranging the outer separator so as to cover either the first electrode or the second electrode; And
And a separation membrane winding step of winding the central separation membrane and the outer separation membrane so that the forefront ends of the central separation membrane and the outer separation membrane are centered. The method according to claim 1,
Wherein the first placement regions and the second placement regions are set to coincide in position with each other. The method according to claim 1,
Wherein the first electrodes are used as a cathode, and the second electrodes are used as an anode. 4. The method of claim 3, wherein after the second electrode placement step,
And a winding start portion from the first placement region following the foremost end of the central separation membrane and from the second placement region positioned from the first placement region to the foremost end of the center separation membrane,
Wherein the winding position is set to the outermost portion of the winding up to the rearmost end of the central separation membrane and the second placement region of the last end of the rearmost end. [6] The method of claim 4,
The first and second electrodes disposed at the foremost end of the central separation membrane,
The winding start portion is formed by winding the first and second electrodes disposed on the foremost end of the central separation membrane so that the second electrode and the first and second electrodes are positioned on one side and the other side,
The electrode winding portion is formed by winding the first and second electrodes so that the first and second electrodes are sequentially arranged around the winding start portion,
Wherein the outer edge of the outer wrapping portion is formed by winding the first electrode on both sides of the electrode winding portion. The method according to claim 1,
The length of the foremost end of the central separator and the length of the foremost end of the outer separator are extended from the first and second electrodes located at the foremost end of the central separator to a predetermined length,
And bending the extending portion along a direction opposite to the extending direction. The method according to claim 1,
Wherein the first electrode disposing step and the second electrode disposing step are performed at the same time. The method according to claim 1,
Wherein the arrangement of the first electrodes and the arrangement of the second electrodes are performed by a heat-bonding method. A central separator which is sequentially wound around the center;
A central electrode part attached to the central part of the central separation membrane and having a first electrode and a second electrode which are different electrodes attached to both sides of the central separation membrane, A winding starting portion having an outer electrode portion constituting an electrode;
An electrode winding unit formed by winding a first electrode and a second electrode, which are different electrodes along an outer side of the winding starting part, so as to be sequentially arranged in a row;
A winding outermost portion formed by winding so that first electrodes are disposed on both sides of the electrode winding portion wound on the outer side of the winding start portion; And
And an outer separator disposed between the wound central separator and wound along the central separator. The method of claim 9, wherein the second electrode is an anode,
Wherein the first electrode is a negative electrode. 10. The method of claim 9,
A length of the foremost end of the central separation membrane and a length of a distal end of the outer separation membrane are extended from the first and second electrodes located at the foremost end of the central separation membrane to a predetermined length,
And wherein the extension is bent along an opposite, extended direction.

Images