KR101259578B1 - Apparatus and method for manufacturing can of secondary battery - Google Patents

Abstract

According to the present invention, the can-formed can member for secondary battery can be aligned by taking out and arranging, applying a friction vibration to the open ends of the aligned can members, and removing burrs and / or forming a round, followed by cleaning using a cassette type cleaner. Disclosed are a manufacturing apparatus and a method. The disclosed can manufacturing apparatus includes: a guide member having a plurality of guide holes for receiving a cylindrical can member with an open press-formed upper portion; A processing unit for finely processing the open ends of the plurality of can members accommodated in the guide member by friction vibration; And a cassette type cleaning unit for arranging and cleaning a plurality of can members having finely processed open ends in predetermined trays. In addition, the can manufacturing method includes pressing a cold rolled steel sheet to form a cylindrical can member having an open top; Sorting out the press-formed can member; Arranging a plurality of can members such that their open ends face a predetermined direction and applying vibration to the open ends of the can members to finely process the open ends; And arranging and cleaning the plurality of can members in which the open ends are finely processed in the tray.

Description

Apparatus and method for manufacturing secondary battery cans {APPARATUS AND METHOD FOR MANUFACTURING CAN OF SECONDARY BATTERY}

The present invention relates to an apparatus and a method for manufacturing a can for forming a body of a cylindrical lithium-ion secondary battery, and more particularly, to remove burrs by aligning press-formed cans and applying vibration to their open ends. In addition, the present invention relates to a secondary battery can manufacturing apparatus and method for forming a round and cleaning by a cassette cleaning method.

Cylindrical lithium-ion secondary batteries used as energy sources for electrical and electronic products such as notebooks are inserted into an electrode assembly in a cylindrical can with an open top, and a beading part is formed in a can corresponding to the upper outer circumferential surface of the electrode assembly. It is manufactured by clamping the top of the can after installing this mounted cap assembly.

During the beading process and the clamping process of the secondary battery manufacturing process as described above, metal foreign materials, etc., should not be introduced into the can. This ingress of metal foreign material may occur due to burrs present at the end of the press-formed can or the sharpness of the end of the can, thus eliminating burrs present at the open end of the can during manufacture of the can. It is necessary to round the open end to a predetermined curvature.

One example of a typical method for manufacturing cans for secondary batteries for this purpose is a method of randomly taking out a plurality of press-formed cylindrical can members and cleaning them with a barrel type cleaner. However, such a general method has a problem in that a large number of defects are generated by deforming a plurality of can members while colliding with each other in the barrel and the burrs are not completely removed.

As another conventional method, there is a method in which a plurality of press-formed cylindrical can members are randomly taken out and placed in a barrel to perform nickel electroplating. In this method, burrs are removed and corner edges are formed, but as in the case of the example described above, a plurality of can members collide with each other in the barrel to deform, causing a lot of defects, and also complicated and expensive processes. There is a problem that the cost is increased by performing nickel plating.

The present invention has been made in view of the above, it is possible to form a suitable round at the open end of the can member, as well as to remove the burrs that cause foreign matter when assembling the secondary battery without deformation of the can member. It is an object of the present invention to provide a secondary battery can manufacturing apparatus and manufacturing method.

In the secondary battery can manufacturing apparatus according to the present invention for achieving the above object, the press-formed can member is arranged to take out and arranged, by applying a friction vibration to the open end of the aligned can member can remove the burr and / or round And configured to clean using a cassette type cleaner.

According to a preferred embodiment of the present invention, a secondary battery can manufacturing apparatus includes: a guide member having a plurality of guide holes for receiving a cylindrical can member with a press-formed open top; And a processing unit for finely processing the open ends of the plurality of can members accommodated in the guide member by friction vibration.

The processing unit includes a friction jig in contact with the open ends of the plurality of can members; And a driving unit vibrating the friction jig.

In addition, the can member contact portion of the friction jig may be formed in a flat or curved or inclined surface.

In addition, the processing unit may include a plurality of friction jigs, to finely process the open end of the can member in a plurality of stages. Preferably, a flat friction jig having a flat can member contact portion and a curved surface of the can member contact portion may be curved. It can be finely processed in two or more steps by using a friction jig or using a planar friction jig and a slope friction jig. At this time, the machining by the planar friction jig removes the burr of the upper plane of the open end of the can member in particular, and the curved or inclined friction jig enables the burr removal of the open end side and the rounded formation at the open end. At this time, by processing with a curved surface or inclined surface friction jig first, and then processing with a planar friction jig, it is possible to prevent the processing residues to remain at the open end of the can member.

Further, the friction jig may be formed to include a flat can member contact portion and a curved can member contact portion, or a flat can member contact portion and an inclined surface can member contact portion at the same time, so that the effect of the stepwise machining can be simultaneously achieved in one step. have. By using such a complex friction jig, it is possible to simultaneously carry out burr removal and end round formation of the upper plane and side of the can member open end in one process.

Preferably, the friction jig may be brought into contact with the open ends of the plurality of can members by rotational vibration with amplitude.

Preferably, the guide member may be provided with one or more O-rings on the surface in contact with the cylindrical can member.

Preferably, the processing unit may further include dust collecting means for suctioning and discharging the fine powder form residue generated during processing of the can member.

In addition, the secondary battery can manufacturing apparatus of the present invention may further include an air spray unit for pressing the can member from the top during the processing of the can member by the processing unit.

In addition, the can manufacturing apparatus for secondary batteries of the present invention may include a cassette type cleaning unit for arranging and cleaning a plurality of can members whose open ends are finely processed in a predetermined tray.

On the other hand, a secondary battery can manufacturing method for achieving the object of the present invention, the step of forming a cylindrical can member by pressing the cold-rolled steel sheet to the upper open; Sorting out the press-formed can member; Arranging a plurality of can members such that their open ends face a predetermined direction and applying vibration to the open ends of the can members to finely process the open ends; And arranging and cleaning the plurality of can members in which the open ends are finely processed in the tray.

Here, the fine processing of the open end of the can member may include a plurality of steps of fine processing of the open end of the can member into a flat surface or a curved surface or an inclined surface. As a result, the burr at the open end of the can member may be completely removed and an appropriate round may be formed to prevent the formation of metal foreign matter during assembling of the secondary battery.

According to the present invention, since a plurality of press-formed can members are arranged in alignment, frictional vibration is applied to the open ends thereof, fine processing is performed, and washing is performed in a state where they are accommodated in a tray. Not only can it be formed, but the can members do not contact and collide with each other so that the can members are not deformed.

In addition, there is no need to perform expensive nickel electroplating and the like, so that the process is simple and can manufacture cost can be reduced.

1 is a perspective view of a secondary battery can manufacturing apparatus according to an embodiment of the present invention,
FIG. 2 is a perspective view illustrating a guide member and an air spray unit of the secondary battery can manufacturing apparatus of FIG. 1; FIG.
3 is a view showing a flat friction jig,
4 is a view showing a curved friction jig,
5 is a cross-sectional view showing an example of processing a can member using a curved friction jig;
6 is a cross-sectional view of the inclined surface friction jig,
7 is a cross-sectional view of a composite friction jig including a flat can member contact portion and a curved can member contact portion;
8 is a perspective view schematically showing the configuration of a can manufacturing apparatus for a secondary battery according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It should be understood to include substitutes.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

1 is a perspective view of a secondary battery can manufacturing apparatus according to an embodiment of the present invention, Figure 2 is an enlarged view of a portion of the apparatus of FIG.

1 and 2, the secondary battery can manufacturing apparatus according to an embodiment of the present invention, a plurality of guide holes (11) for accommodating the cylindrical can member (1) of the upper part is supplied by press molding is open. And a processing unit 20 for finely processing the open ends of the plurality of can members 1 accommodated in the guide member 10 by friction vibration.

The cylindrical can member 1 is formed in a cylindrical shape in which one side is blocked and the other is opened by press forming a cold rolled steel sheet (Ni-plated steel, NPS).

For example, the guide member 10 has a structure in which a plurality of guide holes 11 penetrate through a rectangular body, and the plurality of guide holes 11 are arranged at a predetermined interval. The diameter of the guide hole 11 is formed slightly larger than the diameter of the can member (1).

The processing unit 20 is disposed below the guide member 10 and the friction jig 21 and the driving unit 22 for vibrating the friction jig 21 in contact with the open end of the plurality of can members (1). It is provided.

The friction jig 21 is formed as a flat friction jig 21a in which the can member contact portion of the friction jig is flat as shown in FIG. 3, or a curved friction jig 21b in which the can member contact portion of the friction jig is concave as shown in FIG. It can be formed into). FIG. 5 shows an example in which the open end of the can member is processed into a curved friction jig 21b. The friction jig may also be formed by the inclined surface friction jig 21c having the can member contact portion having a predetermined inclination angle as shown in FIG.

The planar friction jig 21a, the curved friction jig 21b, and the inclined surface friction jig 21c may be used alone, respectively. When the flat friction jig 21a is used, the open end of the can member 1 is vibrated in contact with the flat can member contact portion of the flat friction jig 21a, so that the burr of the can member open end is removed. . In the case of using the curved friction jig 21b or the inclined friction jig 21c, vibration is applied while the open end of the can member is in contact with the curved or inclined surface.

Further, the secondary jersey can manufacturing apparatus according to the present invention may preferably use the above-described flat friction jig 21a, curved friction jig 21b, or inclined surface friction jig 21c together. That is, it can be processed in two steps by using the flat friction jig 21a and the curved friction jig 21b, or the flat friction jig 21a and the inclined surface friction jig 21c. In particular, the burr of the upper plane of the open end of the can member is removed, and the curved rubbing jig 21b or the inclined rubbing jig 21c enables side burr removal and end round formation of the open end. At this time, by first processing with the curved friction jig 21b or the inclined surface friction jig 21c and then with the flat friction jig 21a, the residue can be discharged into the space formed by the side processing of the end, so that the open end of the can member. This can prevent processing residues from leaving.

As another embodiment, the friction jig 21 may be formed of a composite friction jig 21d including both the curved can member contact part S1 and the flat can member contact part S2 as shown in FIG. 7. . By using such a complex friction jig 21d, as described above, it is possible to simultaneously perform burr removal and end round formation of the upper plane and side of the can member open end in one process without the necessity of several steps of machining.

In particular, the friction jig 21 may be subjected to rotational vibration with amplitude by the driving unit 22. That is, the friction jig 21 can be processed by contacting the open end of the can member in a rotational motion of a predetermined amplitude to effectively remove the burr at the end and leave no residue.

The drive unit 22 may be preferably used a conventional drive means, such as a motor. In FIG. 1, reference numeral 23 denotes a base plate, and reference numeral 24 denotes a support frame.

In addition, reference numeral 25 in FIG. 1 is a dust collecting means, for vacuum suctioning and discharging the fine powder form residue generated when the can member open end is finely processed by the processing unit.

Meanwhile, in the embodiment shown in FIGS. 1 and 2, a plurality of can members 1 are accommodated in the guide holes 11 of the guide member 10 so that the open end faces downward, and It shows that the open end of the can member 1 is processed by the processing unit 20 provided in the lower portion.

In this case, since the can member 1 is relatively light, the can member 1 may not be properly processed due to floating during processing, or the processing time may be long. In order to solve the problem, the can member 1 of the can member during processing of the can member is shown in FIG. An air injection unit 30 may be provided to pressurize the can member by injecting air at a predetermined pressure from the top.

Air is injected during the processing of the can member through the air spray unit 30, so that the can member is pressed downward, that is, the friction jig 21, the desired processing can be made.

In addition, in order to prevent the surface of the can member 1 from being worn or deformed by friction with the guide member 10 during the open end processing of the can member 1, the guide member 0 as shown in FIG. 5. One or more O-rings 13a and 13b may be provided on the surface contacting the can member 1 therein.

7 is a view schematically showing a secondary battery can manufacturing apparatus according to another embodiment of the present invention.

In the illustrated embodiment, the secondary battery can manufacturing apparatus includes a washing unit 40 for arranging and cleaning a plurality of can members 1 having open ends processed (single and plural) by the processing unit 20 in a tray. ). Since the can member 1 processed as described above is cleaned in the tray, the can members do not come into contact with each other and collide with each other to prevent deformation of the can member.

The tray may be configured such that a bottom grid, a low grid, a middle grid and an upper grid are stacked by a plurality of support pins. Since a plurality of can members are accommodated in such a tray without being in contact with each other and the cleaning is performed, it is possible to prevent deformation of the can members due to collision of the can members.

In FIG. 6, reference numeral 50 denotes an alignment unit for aligning the can member to be press-molded and taken out in a predetermined direction, and the plurality of can members aligned by the alignment unit 50 are guided by, for example, a transfer arm or a robot arm. It is conveyed and supported by each guide hole of the member 10, and in this state, the processing unit 20 can operate to finely process the open end of the can member.

The plurality of can members processed by the processing unit 20 as described above are transferred to the cleaning unit 40 again by the transfer arm or the robot arm, washed, and then transported to the outside.

That is, the secondary battery can manufacturing method according to an embodiment of the present invention, by pressing the cold-rolled steel sheet to form a cylindrical can member having an open top, the can member is press-molded and taken out of the can member in a constant direction Aligning facing; Transporting and supporting the aligned can member to the guide member and operating the processing unit to finely process the open end of the can member; And arranging and cleaning the plurality of can members having the open ends finely processed in the tray.

Here, the fine processing of the open end of the can member may include a plurality of steps of fine processing of the open end of the can member into flat and curved surfaces or flat and inclined surfaces. As a result, the burr at the open end of the can member may be completely removed and an appropriate round may be formed to prevent the formation of metal foreign matter during assembling of the secondary battery.

As described above, the secondary battery can manufacturing apparatus and method according to the present invention are arranged by taking out and arranging a plurality of press-formed can members without performing a barrel type washer or nickel electroplating as in the prior art, and using a friction jig. Since the open end of the can member is finely machined by vibration and then cleaned by a cassette type cleaner, the can member is not deformed and defects caused by the deformation of the can member can be reduced, so that the yield can be improved and the production cost can be reduced. can do.

While specific embodiments of the invention have been described above, it will be apparent to those skilled in the art that the invention may be embodied in other specific forms without departing from the essential features thereof. Accordingly, the illustrated embodiments are to be considered in all respects as illustrative and not restrictive, and therefore, all modifications apparent to those skilled in the art are included therein.

1: Can member 10: Guide member
11: Guide hole 13a, 13b: O-ring
20: machining unit 21, 21a, 21b, 21c, 21d: friction jig
25: dust collecting means 30: air spray unit
40: cleaning unit 50: alignment unit

Claims (14)

A guide member having a plurality of guide holes accommodating a cylindrical can member having a press-formed top open; And
And a processing unit for finely processing the open ends of the plurality of can members accommodated in the guide member by friction vibration.
The processing unit includes a friction jig in contact with the open ends of the plurality of can members; And
The driving unit for vibrating the friction jig; secondary battery can manufacturing apparatus comprising a. The method of claim 1,
Can member contact portion of the friction jig is a secondary battery can manufacturing apparatus, characterized in that the flat surface or curved surface. The method of claim 1,
The processing unit is a secondary battery can manufacturing apparatus comprising a flat friction jig and a curved friction jig. The method of claim 1,
The processing unit is a secondary battery can manufacturing apparatus comprising a flat friction jig and an inclined surface friction jig. The method of claim 1,
The friction jig may include a flat can member contact portion and a curved can member contact portion. The method of claim 1,
The friction jig may include a flat can member contact portion and a slope can member contact portion. 7. The method according to any one of claims 1 to 6,
The friction jig is a secondary battery can manufacturing apparatus, characterized in that in contact with the open end of the plurality of can members by a rotary vibration having an amplitude. 7. The method according to any one of claims 1 to 6,
At least one O-ring is provided on the surface of the guide member in contact with the cylindrical can member. 7. The method according to any one of claims 1 to 6,
The secondary battery can manufacturing apparatus further comprises an air injection unit for pressing the can member during processing of the can member by the processing unit. 7. The method according to any one of claims 1 to 6,
The processing unit is a secondary battery can manufacturing apparatus further comprises a dust collecting means for sucking and discharge the debris generated during the processing of the can member. 7. The method according to any one of claims 1 to 6,
And a cassette type cleaning unit for arranging and cleaning a plurality of can members whose open ends are finely processed in a predetermined tray. Pressing a cold rolled steel sheet to form a cylindrical can member having an open top;
Sorting out the press-formed can member;
Arranging a plurality of can members such that their open ends face a predetermined direction and applying vibration to the open ends of the can members to finely process the open ends; And
And arranging and cleaning a plurality of can members whose open ends are finely processed in a tray. The method of claim 12,
The fine processing of the open end of the can member may include a plurality of steps of fine processing of the open end of the can member into a flat surface or a curved surface or an inclined surface. delete

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