KR20130007140A - Guide roll device - Google Patents

Abstract

PURPOSE: A guide roll device is provided to prevent meandering of fabric by capturing air between fabrics by a roller pressing the fabric in a rewinding process and to uniformize the fabric of quality being re-winded. CONSTITUTION: A guide roll device(100) comprises: a rotating axis(120) rotating the mounting part; a mounting part(130) which has one side end rotatably combined to the rotating axis and the other side end coupled with a roller; and one or more rollers(140) pressurizing fabrics by gravity and coupled to the other side end of the mounting part. The roller comprises a first roller pressurizing a contact portion of the fabric and a winding body of a winding roll; and a second roller pressurizing the fabric in front of the first roller.

Description

Guide Roll Device {Guide Roll Device}

The present invention relates to a guide roll device, and more particularly, to a guide roll device in which, in a rewinding process in which a fabric wound on a feeding roll is unwound in a battery production process to perform a predetermined process and then wound on a winding roll, Or preventing the fabric from meandering, comprising: a rotating shaft for rotating the mounting portion; A mounting part having one end rotatably coupled to the rotating shaft up and down and having the following roller mounted on the other end thereof; And at least one roller which is engaged with the other end of the mounting portion and presses the raw material by its own weight.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been extensively used as an energy source or an auxiliary power device for wireless mobile devices. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.

Such a secondary battery is manufactured such that the electrode assembly is embedded in the battery case together with the electrolyte solution. The electrode assembly is classified into a stack type, a folding type, and a stack-folding type according to a manufacturing method. In the case of the stacked or stacked-folded electrode assembly, the unit assembly has a structure in which an anode and a cathode are sequentially stacked with a separator interposed therebetween. To fabricate such an electrode assembly, it is necessary to first fabricate the anode and the cathode.

That is, in order to manufacture unit electrodes such as a positive electrode and a negative electrode, first, a process of notching a continuous electrode sheet coated with an electrode active material on one surface or both surfaces at unit electrode intervals is required. In this notching process, a method of notching a part of an electrode sheet using a press is generally used.

On the other hand, the rewinding process of unwinding the fabric wound on the feeding roll in a battery production process and performing a predetermined process such as notching, electrode mixture coating or coating agent coating and then winding the winding roll is repeatedly used in the overall battery production process. have. However, when the fabric is loosely wound in the rewinding process, there is a problem that air is trapped between the cloths as shown in Fig. 1, and meander (A) occurs on the fabric.

Further, when the electrode sheet on which the tabs are formed by notching is rewound by the rollers, if one of the tabs formed by the notching process is rewound by the rollers and one is bent, the next tabs overlap each other on the tabs Is increased.

Therefore, the need for a guide roll device that can fundamentally solve this problem is very high.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

The inventors of the present application have conducted intensive research and various experiments and have developed a guide roll device capable of tightly winding a fabric with a uniform pressure using a roller having a specific structure as described later, .

It is another object of the present invention to provide a guide roll having a specific structure capable of uniformizing the quality of a rewinding fabric by preventing air from being caught between the fabric ends by the roller pressing the fabric by its own weight in the rewinding process, Device.

In order to accomplish the above object, in a rewinding process in which a fabric wound on a feeding roll is loosened in a battery production process to perform a predetermined process and then wound on a winding roll, air is trapped between the fabric rolls Or preventing the fabric from meandering,

A rotating shaft for rotating the mounting portion;

A mounting part having one end rotatably coupled to the rotating shaft up and down and having the following roller mounted on the other end thereof; And

One or more rollers coupled to the other end of the mounting portion and pressing the fabric by its own weight;

It may be configured to include a structure.

Therefore, in the guide roll device according to the present invention, when the fabric is unwound and subjected to a predetermined process and then wound on a winding roll, the rollers coupled to the other end of the loading portion automatically presses the fabric by its own weight, It is possible to prevent the air from being trapped or the fabric to be wound off from the correct position.

Further, the guide roll device can easily press the fabric by its own weight without a separate power source for driving the rollers.

As mentioned above, the rewinding process is frequently used repeatedly in the overall battery production process. Therefore, the predetermined process of unwinding the fabric may be a variety of processes, for example, as follows.

As one example, the process may be a process of applying the electrode mixture to the metal sheet. In this case, the fabric wound on the winding roll after performing the above process may be an electrode sheet having an electrode mixture (including an electrode active material) coated on one or both surfaces of a metal sheet (electrode current collector).

As another example, the process may be a process of applying a coating to the separator.

On the other hand, when the tabs and the notches are formed in a predetermined size at the upper and lower ends of the fabric by the press, when the fabric is wound on the winding roll while being wound, there arises a problem that the tabs are bent. In addition, even if the fabric is not rolled up while being wound on the winding roll, the surface of the fabric is scratched during the rolling and stretching process of the fabric, and when the fabric is wound, the fabric is pushed in a direction perpendicular to the winding axis, There is a problem of growing.

Therefore, in order to solve such a problem, it is necessary to prevent skewing when the notched fabric is wound. Therefore, the guide roll device according to the present invention is preferable for the rewinding process after the step of notching the electrode sheet at intervals of unit electrodes Lt; / RTI >

Preferably, the roller includes a tab guide portion for guiding the tab formed by the notching process, so that the tab guide portion of the roller constantly pressurizes the tab at a predetermined pressure during the rewinding process after the notching process, .

The guide roll device is not particularly limited in terms of the mounting position as long as it is necessary to press the raw fabric by its own weight. For example, the guide roll device may be a structure in which the raw fabric is wound on a rewinder.

In some cases, the guide roll device may further include a variable post which adjusts the vertical height in a state where the lower end is fixed.

In this structure, the guide roll device may include a lower plate to which a lower end of the variable post is fixed.

The roller can be automatically changed in vertical height by its own weight according to the winding diameter of the fabric.

In some cases, the roller may be constituted by a first roller which presses a portion where the fabric comes into contact with the winding body of the wrapping roll, and a second roller which presses the fabric from the front of the first roller.

The rollers may be, for example, a flat roller or a crown roller, and the flat rollers are rollers having the same diameter at the center and both ends of the rollers in the longitudinal direction of the rollers, and the crown rollers have a large diameter at the center of the rollers Means a roller whose diameter decreases toward both ends of the roller. However, it is needless to say that the types of rollers are not limited to the above examples.

Preferably, the length of the rollers is greater than or equal to the width of the fabric to be wound, so that it is possible to prevent meandering of the fabric, and the size of the rollers is preferably within 120% of the width of the fabric.

The roller preferably has a structure that operates at an internal angle of 90 degrees or less with respect to one end of the mounting portion in order to press the fabric by its own weight.

On the other hand, it is more preferable that the surface of the roller is coated with titanium to prevent wear.

Preferably, the roller and the mounting portion are connected by bearings so that the roller can move finely to the left and right with respect to the mounting portion. In particular, the bearing connection structure is preferable because the position error portion of the roller can be automatically compensated when the thickness of the material to be wound is not uniform.

The rotary shaft may be mounted on a plate of the equipment, and in this case, a separate variable post is not required, which is preferable.

The present invention also provides an electrode assembly manufactured using the guide roll device.

The present invention also provides a secondary battery in which the electrode assembly is sealed inside the battery case together with the electrolyte solution.

The secondary battery may preferably be a lithium secondary battery having high energy density, discharge voltage, and output stability. Other components of the lithium secondary battery according to the present invention will be described in detail below.

Generally, a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, a non-aqueous electrolyte containing a lithium salt, and the like.

The positive electrode is prepared, for example, by applying a mixture of a positive electrode active material, a conductive material and a binder on a positive electrode current collector, followed by drying, and if necessary, a filler is further added. The negative electrode is also manufactured by applying and drying the negative electrode material on the negative electrode collector, and if necessary, may further include the above-described components.

The separator is interposed between the cathode and the anode, and an insulating thin film having high ion permeability and mechanical strength is used.

The lithium salt-containing non-aqueous electrolyte solution consists of a nonaqueous electrolyte solution and a lithium salt, and a liquid nonaqueous electrolyte solution, a solid electrolyte, an inorganic solid electrolyte, and the like are used as the nonaqueous electrolyte solution.

Since the current collector, the electrode active material, the conductive material, the binder, the filler, the separator, the electrolyte, the lithium salt, and the like are known in the art, a detailed description thereof will be omitted herein.

The lithium secondary battery according to the present invention can be produced by conventional methods known in the art. That is, it may be prepared by inserting a porous separator between the anode and the cathode and injecting the electrolyte therein.

The anode can be produced, for example, by applying a slurry containing the above-described lithium transition metal oxide active material, a conductive material and a binder on a current collector, followed by drying. Likewise, the negative electrode can be produced, for example, by applying a slurry containing the above-described carbon active material, a conductive material and a binder onto a thin current collector and then drying it.

The present invention also provides a battery pack including two or more of the secondary battery as a unit cell.

The battery pack according to the present invention has a limited mounting space in consideration of mounting efficiency, structural stability, etc. and is a power source for an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a power storage device exposed to frequent vibrations and strong impacts. Can be preferably used.

INDUSTRIAL APPLICABILITY As described above, the guide roll device according to the present invention can use a roller having a specific structure to wind the fabric at a uniform pressure.

In addition, in the guide roll device of the present invention, the quality of the rewinding fabric can be made uniform by preventing the air from being caught between the fabrics by the rollers that press the fabric by its own weight in the rewinding process or by avoiding skew.

1 is a photograph showing a state in which a fabric is meandered in a conventional rewinding process;
2 is a front view of a guide roll apparatus according to one embodiment of the present invention;
3 is a schematic diagram of a notching process according to another embodiment of the present invention;
Figure 4 is a plan view of the fabric produced by the notching process of Figure 3;
5 is a photograph showing a state in which the roller presses the fabric;
6 is a front view of a guide roll device according to one embodiment of the present invention;
7 is a front view of a guide roll device according to another embodiment of the present invention;
Figs. 8 and 9 are photographs showing the connection relationship between the roller and the mounting portion in Fig.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

FIG. 2 is a schematic front view of a guide roll according to an embodiment of the present invention, and FIG. 3 is a schematic view of a notching process according to another embodiment of the present invention. In addition, Fig. 4 schematically shows a plan view of the fabric produced by the notching process of Fig.

Referring to these figures, the guide roll device 100 includes a rewinding process (not shown) for unwinding the fabric 700 wound on the feeding roll 200 in the battery production process, performing a notching process 300, In the process, a rotating shaft 120, a mounting portion 130, and a roller 140 are configured to trap air between the fabrics or prevent meandering of the fabric.

The rotary shaft rotates the mounting portion 130. One end of the mounting portion 130 is rotatably coupled to the rotary shaft 120 up and down and the roller 140 is mounted at the other end.

The roller 140 is engaged with the other end of the mounting portion 130 and presses the fabric (700 in Fig. 5) by its own weight.

In addition, the guide roll device 100 includes a variable post 110 for adjusting the height of the lower portion of the guide roll device 100 and a lower plate 150 to which the lower end of the variable post 110 is fixed. The lower plate 150 and the variable post 110 may be omitted when the guide roll device 100 is mounted on a part of the rewinder 500. [

The height of the roller 140 is automatically changed by its own weight according to the winding diameter of the fabric 700.

Referring to FIG. 4, in the notching process, the electrode sheet 720 coated with the electrode mixture on both sides of the metal sheet is hatched by the molds 310, 320 at the unit electrode interval D, And a notch 730 is formed.

In addition, the notching process includes a pitch and length of the electrode tabs 710, a vision camera 400 for inspecting shoulder lines, and an unwinder roll 600 for unwinding the protective film.

The fabric 700 comprises an electrode sheet 720 on both sides of a metal sheet coated with an electrode mixture and an uncoated region 740 on which an electrode mixture is not applied to form an electrode tab.

The guide roll device 100 is mounted on a rewinder 500 that winds the fabric 700 and the roller 140 operates at an internal angle of 90 degrees or less with respect to one end 132 of the mounting portion 130 have.

Fig. 5 is a photograph showing a state in which the roller presses the fabric, and Fig. 6 is a front view photograph of the guide roll according to an embodiment of the present invention.

2, the length of the roller 140 is larger than the width of the fabric to be wound, and the surface of the roller 140 is coated with titanium to prevent wear. Needless to say, the rotary shaft 120 can be mounted on the plate B of the facility.

5, in the conventional rewinding process, when one of the taps formed by the notching process of FIG. 4 is rewound by the rollers and one of them is bent, the next tabs overlap each other on the tapped tabs, Resulting in many taps.

In contrast, the roller 140 according to the present invention presses the tab of the electrode sheet at a predetermined pressure constantly to prevent the tabs from being bent by the tab guide portion having a size larger than the width of the fabric to be wound.

7 is a front view of a guide roll device according to another embodiment of the present invention.

Referring to Fig. 7, the roller is constituted by a first roller 140b for pressing a portion where the fabric comes into contact with the winding body of the winding roll, and a second roller 140a for pressing the fabric at the front side of the first roller . Therefore, it is possible to more effectively prevent the phenomenon in which air is trapped between the fabrics and the meandering phenomenon of the fabric by winding the fabric more tightly with a uniform pressure.

Figs. 8 and 9 show photographs showing the connection relationship between the roller and the mounting portion in Fig.

Referring to Figures 8 and 9 together with Figures 2 and 6, the roller 140 and the mounting portion 130 are connected by a bearing C so that the roller 140 is fine .

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (20)

A guide roll device for separating air from a fabric or preventing meandering of a fabric in a rewinding process for unwinding a fabric wound on a feeding roll in a battery production process and winding the same on a winding roll after performing a predetermined process,
A rotating shaft for rotating the mounting portion;
A mounting part having one end rotatably coupled to the rotating shaft up and down and having the following roller mounted on the other end thereof; And
One or more rollers coupled to the other end of the mounting portion and pressing the fabric by its own weight;
Wherein the guide rollers are rotatable. The guide roll apparatus according to claim 1, wherein the step of applying the electrode mixture to the metal sheet is performed. The guide roll device according to claim 1, wherein the process is a process of applying a coating agent to the separation membrane. The guide roll device according to claim 1, wherein the step is a step of notching the electrode sheet at a unit electrode interval. 5. The guide roll device according to claim 4, wherein the roller includes a tab guide portion for guiding a tab formed by a notching process. The guide roll device according to claim 1, characterized in that the guide roll device is mounted on a rewinder winding the fabric. The guide roll device according to claim 1, wherein the guide roll device further comprises a variable post which adjusts a vertical height in a state where a lower end is fixed. The guide roll device according to claim 7, wherein the guide roll device further comprises a lower plate to which a lower end of the variable post is fixed. The guide roll device according to claim 1, wherein the roller is automatically changed in vertical height by its own weight according to the winding diameter of the fabric. The sheet processing apparatus according to claim 1, wherein the roller is constituted by a first roller for pressing a portion where the fabric comes into contact with the winding body of the wrapping roll, and a second roller for pressing the fabric at the front side of the first roller Guide roll device. The guide roll device according to claim 1, wherein the roller is a flat roller or a crown roller. The guide roll device according to claim 1, wherein the length of the roller is equal to or greater than the width of the fabric to be wound. The guide roll device according to claim 1, wherein the roller operates at an internal angle of 90 degrees or less with respect to one end of the mounting portion. The guide roll apparatus according to claim 1, wherein the surface of the roller is coated with titanium to prevent wear. The guide roll device according to claim 1, wherein the roller and the mounting portion are connected by a bearing. The guide roll device according to claim 1, wherein the rotary shaft is mounted on a plate of the facility. An electrode assembly, which is manufactured using the guide roll device according to any one of claims 1 to 16. 18. The secondary battery of claim 17, wherein the electrode assembly is sealed inside the battery case together with an electrolyte. A battery pack comprising two or more of the secondary battery according to claim 18 as a unit cell. The battery pack as claimed in claim 19, wherein the battery pack is used as a power source for an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a power storage device.

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