KR20200091731A - Pipe member shape correcting device and pipe member manufacturing system having the same for battery frame - Google Patents

Abstract

The present invention relates to a pipe member shape correction apparatus for a battery frame and a pipe member manufacturing system having the same. The pipe member shape correction apparatus for the battery frame of the present invention may eliminate or alleviate a defect in curvature or a defect in a corner angle in which the specific surface of a frame made of a metal material constituting a battery cell or a battery module gently protrudes. The pipe member shape correction apparatus for the battery frame includes a pair of parallel rotating shafts and a pair of shape correction rollers.

Description

Pipe member shape correcting device for battery frame and pipe member manufacturing system provided therewith{PIPE MEMBER SHAPE CORRECTING DEVICE AND PIPE MEMBER MANUFACTURING SYSTEM HAVING THE SAME FOR BATTERY FRAME}

The present invention relates to a pipe member shape correcting device for a battery frame and a pipe member manufacturing system having the same. In more detail, the present invention provides a battery frame or pipe member shape correcting device for removing or alleviating a bending defect or a corner angle defect in which a specific surface of a metal frame constituting a battery cell or a battery pack gently protrudes, and the same. It is related with the pipe member manufacturing system provided.

In general, a battery pack provided in an electric vehicle or an energy storage device uses a method in which a plurality of battery modules each composed of a plurality of battery cells are packaged together with a battery management device (BMS). The battery cell or battery module constituting such a battery pack uses a metal frame (or housing) to maximize heat dissipation performance.

The battery cell or the battery module is configured in a flat cuboid shape in order to efficiently utilize the storage space inside the battery pack, and the number, etc. of the battery pack may be selected and determined according to the capacity of the battery pack.

The frame of the battery cell or battery module (hereinafter referred to as a'battery frame') is made of an aluminum metal material that is easily extruded, and can be manufactured through an individualization process after being extruded into a long pipe shape by an extrusion process.

In general, the frame of the battery cell of a rectangular parallelepiped shape is composed of a flat rectangular parallelepiped shape, and the pipe member for manufacturing the frame of the battery cell can be extruded into a flat square pipe shape, in which case the cross-sectional shape of the pipe member is a square ring shape Can be

1 and 2 show an example of a shape defect of a pipe member manufactured through an existing pipe member manufacturing system for a battery frame.

The pipe member for the battery frame can be extruded by an extrusion device. When the cross-section of the pipe member is formed in the form of a flat rectangular ring, as shown in FIG. 1, a defect in which a curved portion p where the long side surface 110 of the pipe member is convex may be formed.

When extruding such a rectangular pipe member using an extrusion device, the thickness of the long side determined by the width of the extrusion slit may be smaller than the thickness of the short side, and the thickness of the extruded pipe member in a high temperature environment may be small. A curved portion may be formed from the long side to the outside, or surface defects such as rustling may occur.

That is, it is presumed that the curved portion p is different from the width and thickness of the long side of the pipe member, unlike the wave defect of which a certain area is recessed. That is, when the width of the long side of the extruded pipe member is large and the thickness is thin, a curved portion may be easily generated.

In general, in the case of extruding the pipe member 100 and the like, in order to achieve straight extrusion with uniform pressure, the area for each area must be set constant. Therefore, the thickness of the long side surface 110 of the flat pipe member 100 may be smaller than the thickness of the short side surface 130, which is a cause of exacerbating the above defects under conditions that facilitate deformation by sagging or external impact. Can.

In addition, in the case of extruding the rectangular pipe member, the extrusion mold of the extruding device is designed such that each corner is 90 degrees, but after extruding, the angle of the corner is greater than 90 degrees for reasons such as thermal deformation. Or small corners.

The inner angle (a) of the upper left corner of FIG. 2 is 90 degrees or less, and the inner angle (b) of the upper right corner is deformed to 90 degrees or more, so that a cross-section of the pipe member may have a parallelogram ring shape.

Accordingly, when a surface curvature defect in which a curved portion is formed on a long side surface shown in FIG. 1 or a corner angle defect in which a deviation of the corner angle shown in FIG. 2 occurs is generated, a correction operation to correct the shape after extrusion is completed This is necessary.

However, it may be performed by a method of pressing the side having a curved portion with a roller or the like in which the bending defect shown in FIG. 1 is formed, but the edge angle defect shown in FIG. 2 is difficult to be corrected by a method of pressing the side with a roller. That is, in the case of a corner angle failure shown in FIG. 2, a calibration operation cannot be performed by simply pressing a specific side of the pipe member, and a manual process of applying a shear force in the tangential direction of the side may be required.

In addition, when such a curved defect or a corner angle defect occurs together, it can be corrected at the same time, which causes a cost increase by a sequential calibration operation because no process or device has been introduced.

The present invention is a pipe member shape correction device for a battery frame and a pipe member having the same, which can remove or mitigate a curved defect or a corner angle defect in which a specific surface of a metal frame constituting a battery cell or a battery module gently protrudes It is an object to solve the problem of providing a manufacturing system.

In order to solve the above problems, the present invention is a pipe member shape correcting device for correcting the shape of a rectangular pipe member having a rectangular cross-sectional shape, a pair of parallel rotating shafts; And a pair of shape correcting rollers respectively mounted and rotated on a pair of rotating shafts to support one adjacent both side surfaces of the pipe member together, and a pair of orthodontics formed between the pair of straightening rollers. It is possible to provide a pipe member shape correcting device characterized in that the pipe member is penetrated with (矯正口), and at least one side flatness of the pipe member or an edge angle of both side boundaries is corrected.

In this case, the pair of straightening rollers may flatten a curved portion protruding curved at least one side surface of the pipe member or correct each corner angle to be a right angle.

Further, at least one driving device for rotationally driving at least one rotational shaft among the pair of rotational shafts may be further included.

Here, the pipe member is a rectangular pipe member having a rectangular cross-sectional shape composed of a long side surface and a short side surface, and each of the shape correcting rollers has the same upper surface area and upper surfaces of a pair of truncated cones having different heights and lower surface areas. It may be configured in a bonded shape.

In addition, the pair of straightening rollers are installed in opposite directions to each other, and the edges of both ends of the pair of straightening rollers are in close contact with each other, so that the shape of the straightener may be rectangular.

In addition, the pair of rotating shafts are horizontally arranged, and each side of the rectangular pipe member may pass through the pair of shape correcting rollers while being inclined in the horizontal or vertical direction.

In addition, in order to solve the above problems, the present invention provides a pipe member manufacturing system for extruding a rectangular pipe member having a rectangular cross-sectional shape composed of a long side surface and a short side surface,

A pair of long side extrusion regions for extruding a pair of long side surfaces of the pipe member are vertically arranged, and a single side extrusion for extruding a pair of short side surfaces connecting a pair of long side surfaces of the pipe member An extrusion mold having an extrusion slit in which regions are horizontally disposed; And,

It can provide a pipe member manufacturing system comprising a; pipe member shape correction device according to any one of claims 1 to 6 for correcting the shape of the pipe member extruded from the extrusion mold.

In addition, the length of the long-side extrusion region of the extruded slit may be 120 millimeters (mm) or more.

In this case, the thickness of the long-side extrusion region and the short-side extrusion region of the extrusion slit may be 1.0 millimeter (mm) to 3.5 millimeter (mm).

In addition, the thickness of the extruded slit short-side extruded region may be greater than the thickness of the long-side extruded region.

Here, the pipe member is made of aluminum or an aluminum alloy material, and the extrusion temperature in the extrusion mold may be 500°C to 550°C.

In addition, to solve the above problems, the present invention can provide a rectangular pipe member having a rectangular cross-sectional shape composed of a long side and a short side whose shape is corrected by a pipe member shape correcting device according to any one of the preceding claims.

According to the pipe member shape correcting device for a battery frame according to the present invention and a pipe member manufacturing system having the same, a curved protrusion failure or corner angle defect of a specific surface of a metal frame constituting a battery cell or a battery module can be simultaneously corrected. Can.

In addition, according to the pipe member shape correcting device for a battery frame according to the present invention and a pipe member manufacturing system having the same, correction of a curved protrusion failure or corner angle defect of a specific surface of a metal frame constituting a battery cell or a battery module is corrected. By simplifying the process to be performed, it is possible to simplify processes such as battery cells and reduce costs.

In addition, according to the pipe member shape correcting device for a battery frame according to the present invention and a pipe member manufacturing system having the same, in the slit of the extrusion mold extruding the pipe member, a long side surface extrusion area is vertically arranged to form a long side surface of the pipe member. It is possible to minimize generated wave defects or depression defects.

1 and 2 show an example of a shape defect of a pipe member manufactured through an existing pipe member manufacturing system for a battery frame.
Figure 3 shows an extrusion mold of the pipe member extrusion device for a battery frame of the present invention.
Figure 4 shows the tip of the pipe member extruded through the pipe member extrusion device for a battery frame of the present invention.
5 shows a pipe member shape correcting device according to the present invention.
Figure 6 shows a process for correcting the shape of the pipe member through the pipe member shape correcting device according to the present invention.
7 shows an example of a cross-sectional view of a pipe member whose shape has been corrected through a pipe member shape correcting device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete, and that the spirit of the invention is sufficiently conveyed to those skilled in the art. Throughout the specification, the same reference numbers indicate the same components.

Figure 3 shows a front view of the extrusion mold 210 of the pipe member extrusion device for a battery frame of the present invention, Figure 4 is a front end of the pipe member 100 extruded through the pipe member extrusion device for a battery frame of the present invention City.

In general, the frame of the rectangular parallelepiped battery cell is composed of a flat rectangular parallelepiped, and the pipe member 100 for manufacturing such a battery frame is continuously produced by an extrusion process, and the pipe member is cut into a predetermined length to cut the battery cell. Can be used as a frame.

In the extrusion method of the pipe member 100, when the high temperature metal billet is pushed at a high pressure in the direction of the extrusion mold from the rear of the extrusion mold 210, the pipe member 100 may be continuously extruded in the form shown in FIG. 4.

Extrusion mold constituting the pipe member extrusion device for the battery frame of the present invention may be extruded in a state in which the single-sided extrusion region 223 of the extrusion slits 220 of the rectangular ring-shaped extrusion mold is disposed in the horizontal direction, Extrusion may be performed while the long side extrusion region 221 is disposed in the horizontal direction.

In the case of extruding a pipe member having a rectangular ring cross-section shape, a bending defect protruding curved on a specific side can be easily corrected through a facility, but a defect such as rumbling or depression is easy to correct a shape defect with an automated facility. not.

Therefore, when extrusion is performed in a state in which the single-sided extrusion region 223 of the extrusion mold constituting the pipe member extrusion device is disposed in the horizontal direction, the single-sided surface 130 having a relatively larger thickness in the pipe member 100 ) Extrusion is performed in a state in which the single-sided extrusion region 223 of the extruded slit 220 is extruded in a horizontal direction to minimize deformation, depression or wobble of the pipe member 100 in a high temperature state after extrusion. It is expected to be possible.

When the pipe member has a rectangular ring cross-sectional shape, the width of the long side 110 of the pipe member 100 is 100 mm (mm) to 300 mm (mm), and the width of the short side 130 is 50 mm ( mm) to 150 millimeters (mm) may have a flat square pipe shape having a size of approximately two times the width of the short side surface 130, approximately twice the width of the short side surface 130.

In addition, by extruding a flat square pipe having a thickness of about 1.0 mm (mm) to 3.5 mm (mm), the length of the long side 110 and the short side 130 is 130 mm. It is assumed that the condition is greater than 50 percent greater than the thickness of, but it is applicable even when the pipe member has a non-rectangular square cross section and all side thicknesses are the same.

The pipe member 100 may be made of AL 6063 series aluminum or aluminum alloy material, and the extrusion temperature may be 500°C or higher.

When performing an extrusion process by such an extrusion mold, the pipe member 100 having a rectangular ring cross section of a high and narrow shape as shown in FIG. 4 may be extruded.

When extruding is performed in a state in which the extruded slit 220 has a single-sided extruded region 223 horizontally arranged upwards, the narrow and relatively thick pipe member even before the extrusion is completed and completely cooled ( Deformation of the short side surface 130 of 100) may not easily occur due to self-weight or external impact.

When extruding a pipe member having a rectangular ring section in cross section using the pipe member extruding device for a battery frame, a curved defect or a corner angle failure described with reference to FIGS. 1 and 2 may occur, and this is corrected at once. Method is required.

5 shows a pipe member shape correcting apparatus 300 of the present invention, and FIG. 6 shows a process of correcting the shape of the pipe member 100 using the pipe member shape correcting apparatus 300 of the present invention.

Pipe member shape correcting apparatus 300 according to the present invention includes a pair of parallel rotation axis (320, 340); And, a pair of calibration rollers 310 and 330 for mounting and rotating on a pair of rotating shafts 320 and 340, respectively, and supporting one adjacent both side surfaces of the pipe member 100 together; The pipe member 100 is passed through the orthodontic 301 formed between the pair of orthodontic rollers 310 and 330, and the flatness of each of the four sides of the pipe member 100 or It may be configured to correct the corner angle of the two-sided boundary.

As shown in FIG. 5, the pipe member shape correcting apparatus 300 according to the present invention may be equipped with a correcting roller 310 and 330 on a pair of rotating shafts 320 and 340, respectively.

Between each of the calibration rollers 310 and 330, the pipe member 100 of the present invention may be penetrated and a calibration tool 301 whose shape is corrected may be formed. The orthodontic appliance 301 may be a space between a pair of rollers, and the orthodontic appliance 301 may have a rectangular shape that is a design shape or a required shape of the pipe member 100.

That is, when the pipe member 100 that requires shape correction after extrusion is passed through the orthodontic tool 301 between the pair of orthodontic rollers 310 and 330, the curved portion shown in FIG. 1 is pressurized and flattened , The angle of the angled corner can be corrected to close to 90 degrees.

Accordingly, the pair of straightening rollers 310 and 330 may perform a function of improving the flatness of each side or correcting each corner angle to be a right angle.

The shape of the straightening roller will be described.

Each of the shape correcting rollers 310 and 330 may be configured as a shape in which the top surfaces of a pair of cones having the same area of the top surface and different height and bottom areas are mutually joined, and the centers of the two joined cones are joined. It has a shape through which the rotating shaft. The straightening rollers 310 and 330 may be made of epoxy or a resin material having excellent strength.

Each orthodontic roller has a support end orthogonal to each other (a region of the outer peripheral surface of the truncated cone supporting the pipe member 100).

That is, the first straightening roller 310 includes a first support end 310a supporting a short side surface of the pipe member 100 and a second support end 310b supporting a long side surface, and the first support end ( 310a) and the second support end 310b may be configured to be orthogonal. The shape correcting rollers 310 and 330 may have a shape in which a cone having the same area on the top surface is different in size. Therefore, the angle of the inner groove can be configured to 90 degrees.

In addition, the second straightening roller 330 may also include a first support end 330a supporting a short side surface of the pipe member 100 and a second support end 330b supporting a long side surface. The first support end 330a and the second support end 330b may be configured to be orthogonal.

Here, each of the first support ends 310a, 330a and each of the second support ends 310b, 330b of the pair of straightening rollers 310, 330, which are configured in the same shape and size, and are arranged in opposite directions, are parallel. Can be configured to face each other.

In addition, since each of the straightening rollers is configured to be rotated by a rotating shaft or in a contact state of the pipe member 100, the configuration of the support end does not indicate a specific area of each straightening roller, but is in contact with the pipe member. Means contact area.

Further, at least one driving device 360 for rotationally driving at least one rotational shaft among the pair of rotational shafts 320 and 340 may be further included.

When the extrusion process of the pipe member 100 and the shape correction process of the pipe member 100 are continuous, a separate driving device may be omitted.

However, when the extrusion is completed, the compressed pipe member may be cut to a predetermined length by a cooling process or by limiting the length of the extruded pipe member, so that a subsequent process may be performed.

For the shape correction work of the pipe member 100, the propulsion force to propel the pipe member 100 is required while the pipe member 100 is inserted into the orthodontic tool 301 between a pair of orthodontic rollers 310 and 330. Therefore, at least one rotation axis of the pair of rotation shafts 320 and 340 on which the pair of calibration rollers 310 and 330 are mounted may be configured.

The driving device 360 may include a driving motor directly connected to the rotating shaft or connected by a belt or a chain. In addition, when only one of the pair of rotating shafts 320 and 340 is actively driven, the other rotating shaft may be configured to be manually driven by friction between the pipe member and the support end.

And, in the pipe member shape correcting apparatus 300 shown in FIG. 5, a pair of the rotation shafts 320 and 340 are horizontally disposed, so that each side surface of the rectangular pipe member 100 is horizontal or vertical. In the inclined state may be configured to pass through the calibration tool 301 of the pair of shape correction rollers.

And, as shown in Figure 5, the pair of calibration rollers (310, 330) are configured in the same shape and size, but are installed in opposite directions to each other, both ends of the pair of calibration rollers (310, 330) in the axial direction The shape of the orthodontic orifice 301 formed between the pair of orthodontic rollers 310 and 330 in close contact with the rim may be configured to be rectangular.

The meaning that the edges of both ends of the pair of straightening rollers 310 and 330 are in close contact with each other is that friction or distortion that prevents rotation of opposite directions from each other occurs when the opposite edge of each straightening roller is in contact. It is preferable to be understood to mean that the opposite edge of each straightening roller is approached so as not to be opened during the shape correction process of the pipe member 100 rather than the state.

When the shape of the pipe member 100 is corrected as shown in FIG. 6 by using the shape correcting device 300 of the pipe member 100 configured as described above, the original design is performed by correcting the distortion of the curved protrusion or the corner angle at a time. Like the shape, the cross-sectional shape can be corrected.

7 shows an example of a cross-sectional view of a pipe member 100 whose shape has been corrected through a pipe member shape correcting device 300 according to the present invention.

The curved portion of the long side surface 110 shown in FIG. 1 may be pressurized by the second support end of each straightening roller, and flattening may be performed, and there is a poor curve or the like on the short side surface 130 of the pipe member 100. If it is, it can be flattened by the first support.

The corner angle defect shown in FIG. 2 may be corrected at an inner crossing point of a support end of one support roller or at an outer contact portion of the support ends of both support rollers.

As shown in FIG. 2, the defect of the corner angle of the pipe member 100 does not occur only at a specific corner, but the corner defect at one corner may affect the angle of the other corner.

Accordingly, when a defect in any one corner angle is corrected, the entire corner angle may be corrected together as shown in FIG. 7. In this way, the cross-sectional shape of the final pipe member 100 in which the shape correction operation is completed can be completed in a shape close to a rectangle within tolerance.

Although this specification has been described with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can do it. Therefore, if the modified implementation basically includes the components of the claims of the present invention, it should be considered that all are included in the technical scope of the present invention.

100: pipe member
110: long side
130: single side
210: extrusion mold
220: extruded slit
221: single-sided extrusion area
223: long side extrusion area
300: Pipe member shape correction device
310, 330: Calibration roller
320, 340: rotating shaft
360: driving device
p: curvature

Claims (12)

In the pipe member shape correcting device for correcting the shape of a rectangular pipe member of a rectangular cross-sectional shape,
A pair of parallel axes of rotation; And,
It includes a pair of shape correcting rollers for mounting and rotating on a pair of rotating shafts, respectively, and supporting a pair of adjacent side surfaces of the pipe member together.
Pipe member shape correction characterized in that the pipe member is penetrated by a straightener formed between the pair of straightening rollers, and the edge angle of at least one side flatness or both side boundaries of the pipe member is corrected. Device. According to claim 1,
The pair of straightening rollers are pipe member shape correcting device, characterized in that to flatten a curved portion protruding curved at least one side of the pipe member, or to correct each corner angle to be a right angle. According to claim 1,
And a pipe member shape correcting device further comprising at least one driving device for rotationally driving at least one of the pair of rotational axes. According to claim 1,
The pipe member is a rectangular pipe member having a rectangular cross-sectional shape composed of a long side surface and a short side surface, and each of the shape correcting rollers has the same area of the upper surface and upper surfaces of a pair of cones having different heights and lower surfaces are mutually joined. Pipe member shape correction device characterized in that it is configured in a shape. According to claim 4,
The pair of straightening rollers are installed in opposite directions to each other, and both ends of the axial direction of the pair of straightening rollers are in close contact, so that the shape of the orthodontic appliance is arranged to be rectangular. According to claim 4,
The pair of rotating shafts are horizontally arranged, and each side of the rectangular pipe member passes through the pair of shape correcting rollers in an inclined state in the horizontal or vertical direction. . In the pipe member manufacturing system for extruding a rectangular pipe member of a rectangular cross-sectional shape consisting of a long side and a short side,
A pair of long side extrusion regions for extruding a pair of long side surfaces of the pipe member are vertically arranged, and a single side extrusion for extruding a pair of short side surfaces connecting the pair of long side surfaces of the pipe member An extrusion mold having an extrusion slit in which regions are horizontally disposed; And,
Pipe member manufacturing system comprising a; pipe member shape correction device according to any one of claims 1 to 6 for correcting the shape of the pipe member extruded from the extrusion mold. The method of claim 7,
Pipe length manufacturing system, characterized in that the length of the extrusion region of the long side of the extrusion slit is 120 millimeters (mm) or more. The method of claim 8,
The pipe member manufacturing system, characterized in that the thickness of the long-side extrusion region and the short-side extrusion region of the extrusion slit is 1.0 millimeter (mm) to 3.5 millimeter (mm). The method of claim 9,
Pipe member manufacturing system, characterized in that the thickness of the extruded slit short-side extrusion region is greater than the thickness of the long-side extrusion region. The method of claim 10,
The pipe member is made of aluminum or an aluminum alloy material, and the extrusion temperature in the extrusion mold is 500°C to 550°C. A rectangular pipe member having a rectangular cross-sectional shape composed of a long side and a short side whose shape is corrected by a pipe member shape correcting device according to any one of claims 1 to 6.

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