KR20170027993A - Notching Apparatus Having Integral Die and Stripper - Google Patents

Abstract

The present invention relates to an integral notching apparatus having a die and a stripper. More specifically, as an apparatus for notching an electrode of a battery cell, the notching apparatus includes: an upper mechanism part moving up and down, and having a punch for punching the electrode; shaft-shaped guide posts to which an upper portion of the upper mechanism part is connected to enable the upper mechanism part to be vertically descend; a lower mechanism part connected to a lower portion of the guide posts, mounted thereon with the electrode, and including a die at a position corresponding to the punch of the upper mechanism part; and a stripper disposed between the upper mechanism part and the lower mechanism part, and connected to the guide post to press and fix an electrode to be punched onto the lower mechanism part.

Description

[0001] The present invention relates to a notching apparatus including an integral die and a stripper,

The present invention relates to a notching device comprising an integral die and a stripper.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. In addition, the secondary battery is attracting attention as an energy source for electric vehicles, hybrid electric vehicles, and the like, which is proposed as a solution for air pollution in existing gasoline vehicles and diesel vehicles using fossil fuels. Therefore, the types of applications using secondary batteries are diversifying due to the advantages of secondary batteries, and it is expected that secondary batteries will be applied to many fields and products in the future.

Such a secondary battery may be classified as a lithium ion battery, a lithium ion polymer battery, or a lithium polymer battery depending on the configuration of an electrode and an electrolytic solution. The amount of the lithium ion polymer battery Is growing. 2. Description of the Related Art Generally, a secondary battery includes a cylindrical battery and a prismatic battery in which an electrode assembly is embedded in a cylindrical or rectangular metal can according to the shape of a battery case, and a pouch type battery in which an electrode assembly is embedded in a pouch- , And an electrode assembly embedded in the battery case is a power generation device that includes a positive electrode, a negative electrode, and a separator structure sandwiched between the positive electrode and the negative electrode, and is capable of charging and discharging. The electrode assembly includes a long sheet-like positive electrode coated with an active material, A stacked type or a composite type (stack / folding type) structure in which a jelly-roll type is wound with a separator interposed therebetween, and a plurality of positive and negative electrodes of a predetermined size are sequentially stacked in a state interposed in a separator.

The electrode of such an electrode assembly is manufactured by performing a notching process. In the notching process, the upper plate and the lower plate are mounted on the press, respectively, and the upper plate moves up and down to cut the electrode. A punch is mounted on the upper plate of the notching mold, and a die is mounted on the lower plate of the notching die to make a punch of the electrode when the punch and the die intersect.

Fig. 1 schematically shows a conventional notching apparatus.

Referring to FIG. 1, a conventional notching apparatus 10 is mounted on a punch holder 13 and an upper base 11, in which a punch 12 for punching an electrode 1 moves up and down.

The upper base 11 is fixed by the lower base 55 and the frame 30. When the punch 12 descends, the stripper 70 descends from the side of the punch 12 downward.

The stripper 70 presses the die 51 and the die holder 53 located on the lower base 55 and the lower base 55 on the lower side. The electrode 1 is fixed by a stripper 70 and has a structure in which the punch 12 punches the electrode 1 while penetrating through the hole of the die 51.

In the case of such a punching or notching process, a technique for ensuring a gap between the punch of the notching die and the die is required for smooth punching of the electrode, and a clearance between the punch and the die is called a mold clearance.

In the conventional notching mold, since the punch and the die are assembled through separate processing, it is difficult to secure mold clearance due to machining error and assembly error.

In addition, there arises a problem that the mold clearance changes according to the assembling conditions of the notching mold.

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

More specifically, the present invention provides a notching apparatus for solving the problem that a mold clearance is changed by a notching mold, wherein a member mounting a punch moves along guide posts and moves vertically toward an electrode to notch the electrode. .

According to an aspect of the present invention, there is provided a notching apparatus including an integrated die and a stripper,

An apparatus for notching an electrode of a battery cell,

And a punch for punching the electrode, wherein the upper mechanism part moves up and down;

Shaft-shaped guide posts to which the upper part of the upper mechanism part is connected so that the upper mechanism part is vertically lowered;

A lower mechanism connected to a lower portion of the guide posts, the lower mechanism including an electrode and a die at a position corresponding to the punch of the upper mechanism; And

A stripper positioned between the upper mechanism and the lower mechanism and connected to the guide post, the stripper pressing and fixing an electrode for punching onto the lower mechanism;

As shown in Fig.

That is, in the notching apparatus including the integrated die and stripper according to the present invention, in order to prevent the mold clearance caused by the assembling conditions of the mold and machining errors, the stripper and the die of the mold are integrally formed to improve the accuracy have.

In one specific example,

A punch for punching the electrode;

A punch holder having a plate-like shape for fixing the punch; And

An upper base positioned above the plate-like punch holder and moving up and down;

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The lower-

A die having a perforation corresponding to a punch of the upper mechanism portion;

A die holder for fixing the die; And

A lower base supporting the die holder at a lower portion thereof;

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According to the present invention, the stripper may be structured such that it is integrally formed with the die so that the mold clearance does not change.

In this case, the stripper may have the same processing error as the die.

In this structure, the stripper can be reciprocated up and down together with the upper mechanism portion in a state where the punch is penetrated.

At this time, the stripper may further include an inner stripper having a cemented carbide portion adjacent to a direction in which the punch moves.

In this case, the inner stripper can prevent the generation of frictional heat on the friction surface with the punch and prevent the deformation of the stripper and the punch.

In one specific example, the stripper may be structured such that it is fixed to the guide post and is connected through the upper and lower mechanisms.

In this case, the guide posts may be located at respective corner portions that are rectangular in plan view.

Further, it may further include additional guide posts on the outside of the guide posts.

According to the present invention, the punch can be fastened by bolts.

In a specific example, the punch can be coupled to the punch holder by a clamp.

In such a configuration, the punch may be a structure that is inserted into the die along the face of the stripper that is integrally formed with the die.

Optionally, the notching device may further comprise a back plate for fixing the upper base.

The present invention provides a battery cell fabricated using electrodes notched by a notching device.

The present invention also provides a battery pack including a battery cell.

The present invention also provides a device including a battery pack.

The device may be selected from the group consisting of a cell phone, a portable computer, a wearable electronic device, a tablet PC, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, and a power storage device.

The structure and manufacturing method of such a device are well known in the art, so a detailed description thereof will be omitted herein.

INDUSTRIAL APPLICABILITY As described above, the notching apparatus including the integrated die and the stripper according to the present invention provides an effect of improving the accuracy by processing the die stripper and the die integrally.

In addition, the present invention provides a quality and cost saving effect of a battery cell by reducing cost and improving process efficiency by simple structural modification without adding other components.

1 is a schematic diagram of a conventional notching device;
2 is a schematic diagram of a notching device including an integral die and stripper according to one embodiment of the present invention;
3 is a schematic diagram of an upper mechanism unit constituting the notching apparatus according to one embodiment of the present invention shown in FIG. 2;
FIG. 4 is a schematic view of a lower mechanism portion constituting the notching apparatus according to one embodiment of the present invention shown in FIG. 2;

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.

2 is a schematic diagram of a notching device including an integral die and a stripper according to an embodiment of the present invention, and Fig. 3 is a schematic diagram of an upper mechanism constituting the notching device according to Fig. 2 And Fig. 4 is a schematic diagram of a lower mechanism section constituting the notching apparatus according to Fig.

2 to 4, the notching apparatus 100 according to an embodiment of the present invention includes punches 111 and 112 and includes an upper mechanism part 110 moving up and down, an upper mechanism part 110 A lower mechanism part 150 including dies 151 and 152 at positions corresponding to the punches 111 and 112 of the upper and lower mechanism parts 110 and 112, And a stripper 170 positioned between the upper mechanism unit 110 and the lower mechanism unit 150. The guide posts 130 may be formed of a metal plate,

The upper mechanism unit 110 includes punches 111 and 112 for punching an electrode, a punch holder 113, and an upper base 115. The upper mechanism unit 110 receives the driving force by a driving unit (not shown) and moves up and down.

The punches 111 and 112 have different shapes, and two punches 111 and 112 are positioned above and below the longitudinal centerline with respect to the plane. The punches 111 and 112 are respectively in the form of a rectangle and a " C " The punches 111 and 112 are inserted into the dies 151 and 152 respectively along the faces of the inner strippers 172 and 173 which are formed integrally with the dies 151 and 152.

The lower mechanism part 150 corresponding to the upper mechanism part 110 includes dies 151 and 152 having perforated holes corresponding to the punches 111 and 112, a die holder 153 and a lower base 155 .

The stripper 170 penetrates the guide posts 130 passing through the upper mechanism part 110 and the lower mechanism part 150. The stripper 170 passes through the upper mechanism part 110 with the punches 111, Move. The guide posts 130 pass through the portions of the stripper 170 and the lower mechanism portion 150 corresponding to the through regions (regions A) of the upper holder 113 of the upper mechanism portion 110.

The stripper 170 presses and fixes the electrode immediately before the punching electrode is inserted into the dies 151 and 152 of the lower mechanism unit 150 and punches the punches 111 and 112 when it is fixed.

When the punches 111 and 112 move back and forth, frictional heat is generated on the friction surface. Therefore, in order to prevent the generation of frictional heat and prevent deformation, the stripper 170 is made of cemented carbide Inner strippers 172, 173 are mounted. The inner strippers 172, 173 are mounted on the stripper 170 and are located on top of the dies 151, 152.

The inner strippers 172 and 173 are formed integrally with the dies 151 and 152 so that there is no change in the mold clearance and have the same processing error as the dies 151 and 152.

The guide posts 130 are located at respective corner portions which are rectangular in plan view. The stripper 170 is fixed by the guide posts 130 and is connected through the upper mechanism part 110 and the lower mechanism part 150. And further guide posts 131 connected to the upper base 115 and the lower base 155 are mounted on the outer side of the guide posts 130 with respect to the center line on the plane.

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 (17)

An apparatus for notching an electrode of a battery cell,
And a punch for punching the electrode, wherein the upper mechanism part moves up and down;
Shaft-shaped guide posts to which the upper part of the upper mechanism part is connected so that the upper mechanism part is vertically lowered;
A lower mechanism connected to a lower portion of the guide posts, the lower mechanism including an electrode and a die at a position corresponding to the punch of the upper mechanism; And
A stripper positioned between the upper mechanism and the lower mechanism and connected to the guide post, the stripper pressing and fixing an electrode for punching onto the lower mechanism;
Wherein the notching device comprises: The apparatus of claim 1,
A punch for punching the electrode;
A punch holder having a plate-like shape for fixing the punch; And
An upper base positioned above the plate-like punch holder and moving up and down;
Wherein the notching device comprises: The apparatus as claimed in claim 1,
A die having a perforation corresponding to a punch of the upper mechanism portion;
A die holder for fixing the die; And
A lower base supporting the die holder at a lower portion thereof;
Wherein the notching device comprises: The apparatus according to claim 1, wherein the stripper is integrally formed with the die so as not to cause a change in mold clearance. The apparatus of claim 1, wherein the stripper has the same processing error as the die. [2] The apparatus according to claim 1, wherein the stripper reciprocally moves up and down together with the upper mechanism in a state where the punch is penetrated. The notching apparatus according to claim 1, wherein the stripper further comprises an inner stripper in which a portion adjacent to a direction in which the punch moves is made of a cemented carbide. [2] The apparatus according to claim 1, wherein the stripper moves along a guide post connected through the upper mechanism and the lower mechanism. The notching apparatus of claim 1, wherein the guide posts are positioned at respective corner portions that are rectangular in plan. The notching apparatus according to claim 2 or 3, wherein the punch is fastened by bolts. The notching apparatus according to claim 2 or 3, wherein the punch is coupled to the punch holder by a clamp. The notching apparatus according to claim 2 or 3, wherein the punch is inserted into a die along a face of a stripper processed integrally with the die. The notching apparatus according to claim 2 or 3, wherein the notching apparatus further comprises a back plate for fixing the upper base. A battery cell fabricated using electrodes notched by the notching device according to claim 1. A battery pack comprising the battery cell according to claim 14. A device comprising a battery pack according to claim 15. 17. The device of claim 16, wherein the device is selected from the group consisting of a cell phone, a portable computer, a wearable electronic device, a tablet PC, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, Lt; / RTI >

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