KR100729452B1 - Apparatus and method for manufacturing positive pin in cell - Google Patents

Abstract

Provided are an apparatus for preparing the positive electrode pin of a battery, and a method for preparing the positive electrode pin of a battery to improve electrical conductivity by enhancing the smoothness of head surface of a positive electrode pin, maintain roughness of the head surface uniformly and to prevent the generation of air holes at the surface head. The apparatus comprises a clapping jaw(110) which claps a wire(1); a first punch holder(120) which is installed so as to move toward the clapping jaw and is provided with a concave punch accommodation part(121) at the part toward the clapping jaw; and a first diamond punch(130) which is inserted into the punch accommodation part(131) and is provided with a concave striking surface for molding the wire firstly. Preferably an air discharge hole is formed at the concave part of the first diamond punch.

Description

Battery anode pin manufacturing apparatus and manufacturing method {APPARATUS AND METHOD FOR MANUFACTURING POSITIVE PIN IN CELL}

1 is a front view of a typical lithium battery positive electrode pin

2 is a conceptual diagram showing a head manufacturing step of a conventional anode pin

3 is a cut section of the wire and a side view thereof

4 is a side view showing a state in which the punch of FIG. 2 is in contact with one end of a wire;

5 is a cross-sectional view of the anode pin formed by FIG.

6 to 8 illustrate the structure of the first punch part of the embodiment of the present invention.

6 is a side cross-sectional view of the first punch portion before molding;

7 is a perspective view of the punch of FIG. 6

8 is a side cross-sectional view of the first punch portion after molding;

9 is a side sectional view of a second punch portion in an embodiment of the present invention;

10 is a perspective view of the punch of FIG.

FIG. 11 is a side sectional view showing another embodiment of the second punch portion of FIG. 9; FIG.

12 and 13 show an embodiment of an apparatus for polishing the opposite end of the head,

12 is a perspective view

13 is a partial plan view of FIG. 10.

** Description of the symbols for the main parts of the drawings **

1: wire 110: clapping jaw

120: first punch holder 121: (first punch holder) punch accommodating portion

130: first diamond punch 131: recessed portion of the diamond punch

132: air outlet 220: second punch holder

221: (second punch holder) punch receiving portion

230: second diamond punch 320: transfer wheel

321: body seating groove 322: head guide groove

330: polishing apparatus 344: conveying belt

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery positive electrode pin manufacturing apparatus and a manufacturing method, and more particularly, to a battery positive electrode pin manufacturing apparatus and a method for improving the accuracy of the positive electrode pin length and improving the surface roughness of the head of the positive plate.

A battery is composed of a positive electrode (+ electrode), a negative electrode (-electrode), and an electrolyte, and is classified into various types according to what materials are used for the positive electrode and the negative electrode. A battery that uses lithium as a negative electrode is called a lithium battery, and produces electrical energy through the flow of electrons generated by the oxidation of lithium.

Various materials can be used, and functionally divided into primary battery and secondary battery. Currently used are primary cells of high energy density batteries. Lithium-fluoride graphite cells and lithium-manganese dioxide batteries are already commercialized.

A positive electrode pin is used in a lithium battery as shown in FIG. 1.

The positive pin 10 includes a body 12 of the positive pin and a head 11 formed at one end of the body 12. The surface 13 of the head 11 is a portion for energizing current by contact, and should be formed as small as possible with the surface roughness. It is preferable that the surface roughness of the surface is formed below Rmax = 0.4S.

A conventional anode pin manufacturing method is as follows.

As shown in FIG. 2, after fixing the wire 1 to the clapping jaw 20, the punching surface 31 hits the fixed wire 1 using the punch 30 formed flat. Then, after cutting the wire 1 to a certain length, the portion where the head is formed is polished.

Here, the punch 30 is mainly used cemented carbide material. In order to maintain the surface roughness of the surface 13 of the head by using the cemented carbide material Rmax = 0.4S or less, the surface roughness of the cemented carbide material should be processed to a lower roughness. Nevertheless, the roughness of the surface is increased due to the continuous hitting, which makes it difficult to keep the quality of the product constant.

In addition, as shown in FIG. 3, the lower region 3 is roughly formed on the cut surface of the wire. In this state, as shown in FIG. 4, when the punch 30 hits the wire 1, the pores 5 are formed at adjacent positions of the surface 4 as shown in FIG. 5. Grinding the head in this state, there is a problem that the thin surface 4 is peeled off, the pores 5 are exposed to the outside to roughen the surface roughness.

In addition, when the wire is cut using a cutter, there is a disadvantage that a wide range of length tolerances does not allow production of a positive length pin.

As described above, the conventional anode pin manufacturing method is difficult to maintain the high quality of the anode pin, there is a problem that the higher the occurrence of the defective rate to increase the manufacturing cost as a result.

The present invention has been made to solve the above problems, an object of the present invention to increase the accuracy of the positive electrode pin length, to provide a lithium battery positive electrode pin manufacturing apparatus and method for improving the surface roughness of the head portion of the positive electrode plate.

The present invention provides a cladding jaw for cladding the wire, in order to achieve the object as described above; A first punch holder installed to move toward the clapping jaw and formed by recessing a punch accommodating portion in a portion facing the clapping jaw; And a first diamond punch inserted into the punch accommodating part and formed to concave concave convexly in order to primaryly mold the wire.

Here, it is preferable that an air outlet for discharging air is formed in the recess of the diamond punch.

In addition, a second punch holder is installed to move toward the clapping jaw, the punch receiving portion is formed in the portion facing the clapping jaw; And a second diamond punch inserted into the punch accommodating part and formed to have a flat hitting surface in order to secondaryly mold the wire.

On the other hand, according to another field of the present invention, the clapping jaw is a step of clapping a wire; Moving the first punch holder to convex the head of the wire; And moving the second punch holder to form a flat head of the wire.

Here, the step of grinding the head of the wire; preferably further comprises.

In addition, it is effective to further include; polishing the opposite surface of the head of the wire.

In addition, the present invention is a device for polishing the opposite end of the head of the lithium battery positive electrode pin, the transfer device is formed with a head guide groove into which the head is inserted and a body seating groove into which the body of the positive electrode pin is inserted so that the positive electrode pin is transported in parallel ; And a polishing apparatus installed at predetermined intervals from the head guide groove.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted in order not to disturb the gist of the present invention. In addition, the same reference numerals are given to the same and the same components as those described above, and detailed description thereof will be omitted.

Unlike the prior art, the lithium battery positive electrode manufacturing method of the present invention is characterized in that the head molding is formed by separating the secondary, and the opposite end of the head for the accuracy of the length of the positive electrode pin. That is, by forming the head convexly first and then forming the second flat, it is possible not only to prevent the generation of pores on the surface of the head, but also to polish the end of the head opposite to reduce the tolerance of the entire length of the anode pin. Can be reduced.

6 to 8 are cross-sectional views of main parts of a first punch of an embodiment of a lithium battery positive electrode pin manufacturing apparatus for primary molding, FIG. 6 is a cross-sectional view before molding, and FIG. 7 is a perspective view of the first punch of FIG. 7 is a cross-sectional view after molding.

The first punch part of the embodiment includes a clapping jaw 110 for clapping the wire 1, a first punch holder 120 installed to reciprocate toward the clapping jaw 110, and a first punch holder 120. It consists of a first punch 130 installed in.

The clapping jaw 110 is formed by the surface clapping the wire 1 in the longitudinal direction of the wire, and is formed so that a plurality of pieces are engaged with the wire 1 therebetween.

The first punch holder 120 is formed in a cylindrical shape, the punch receiving portion 121 is formed in the portion facing the clapping jaw (110). In addition, the air hole 122 is formed to penetrate the punch accommodation portion 121.

The first punch 130 is formed to have a size that is inserted into the punch receiving portion 121, the impact surface 131 is formed concave. The air hole 132 is formed in the lowest point of the striking surface 131. The first punch 130 is formed of diamond. In other words, since the surface is formed of a diamond having a smooth and strong hardness, even if repeated processing, the surface is not scratched and a product having a uniform surface roughness is produced.

The air hole 132 is formed to communicate with the air hole 122 of the first punch holder 120. Therefore, even when the head 13 of the wire closes the recessed portion of the first punch 130 as shown in FIG. 6, air is discharged through the air holes 122 and 132, so that the head 13 of the wire is driven by the first punch ( 130 is formed uniformly along the shape.

The first punch 130 is wrapped with a first punch envelope 133. The first punch envelope 133 wraps the first punch 130 so that a portion of the striking surface 131 is exposed. Therefore, after the first punch 130 wrapped with the first punch shell 133 is inserted into the first punch receiving portion 121, the first punch shell 133 and the first punch holder 120 are welded. The first punch 130 may be easily fixed to the first punch holder 120. In addition, the punch can be replaced later.

9 is a sectional view of an essential part of a second punch portion of an embodiment of a lithium battery positive electrode pin manufacturing apparatus for secondary forming.

The second punch portion is composed of a clapping jaw 110, a second punch holder 220 facing the clapping jaw 110, and a second punch mounted to the second punch holder 220.

The clapping jaw 110 may be formed in the same manner as the first punch part, and may be provided separately from the clapping jaw 110 of the first punch part. It is preferable that only the punch holders 120 and 220 are replaced with the second punch holders 220 from the first punch holders 120 while fixing).

The second punch holder 220 is formed by recessing the punch accommodating part 221 on the surface facing the clapping jaw 110.

The second punch 230 is formed to be inserted into the punch receiving portion 221 to be inserted, and the striking surface 231 is formed flat. The second punch 230 is also formed of diamond. The roughness of the hitting surface 231 of the second punch 230 is preferably maintained at 0.2 S or less. As a result of testing with various roughness, a punch having a roughness of 0.2 S or less was required to produce a product having a surface roughness of 0.4 S.

The second punch 230 is wrapped with a second punch envelope 233. The second punch envelope 233 wraps the second punch 230 so that a portion of the striking surface 231 is exposed. Therefore, after the second punch 230 wrapped in the second punch shell 233 is inserted into the second punch receiving portion 221, the second punch shell 233 and the second punch holder 220 are welded. The second punch 230 can be easily fixed to the second punch holder 220. In addition, the punch can be replaced later.

In addition, as shown in FIG. 11, the punch holder 220 is preferably provided to be slightly shifted with respect to the clapping jaw 110. This is because when the hitting surface 231 is aged, the punch 230 is rotated so that other parts of the hitting surface 231 can continue hitting. Therefore, there is an advantage that a large amount of product can be produced with one punch.

As described above, the embodiment of the present invention improves the roughness of the surface of the molded product by forming the first punch 130 and the second punch 230 with diamond. In addition, even after repeated production, the surface roughness of the product was kept constant because the impact surface was not damaged due to the hardness of the diamond. In addition, by secondary molding using the second punch 230 after the primary molding with the first punch 130, it was possible to prevent the generation of pores on the surface of the head. And the head was shape | molded so that it might be located in the center more than eccentricity to either side.

12 and 13 show an embodiment of an apparatus for polishing the opposite end of the head, FIG. 12 is a perspective view and FIG. 13 is a partial plan view of FIG.

The apparatus for polishing the opposite end of the head includes a feeder for feeding the anode pins 10 side by side, a polishing device 330 installed at a predetermined gap from the feeder, and a supply unit for supplying the anode pins 10 to the feeder ( 310 and a collection box 350 for collecting the product discharged from the conveying device.

The transfer apparatus includes a transfer wheel 320 having a head guide groove 322 and a body seating groove 321 formed on an outer circumference thereof, and a pin 10 interposed therebetween at a position where the pin 10 is polished by the polishing apparatus 330. Conveying belt 344 for applying a contact pressure toward the outer circumferential surface of the conveying wheel 320 and the support rollers 341 to 343 for supporting the conveying belt 344.

The body seating groove 321 is formed in parallel to the upper surface of the transport wheel 320 at intervals, the head guide groove 322 is formed across the body seating groove 321. The body seating groove 321 and the head guide groove 322 may be integrally formed on the surface of the transport wheel 320 or may be formed on a separate belt and wound around the transport wheel 320.

The conveying belt 344 serves to fix the pin 10 to the conveying wheel 320 at the position polished by the polishing apparatus 330. Accordingly, as shown in FIG. 9, the support rollers 341 to 343 are disposed so that the conveying belt 344 exerts a contact pressure when the pin contacts the polishing apparatus 330.

Polishing device 330 is preferably a grinding wheel disposed in parallel with the transfer wheel 320. The polishing apparatus 330 is disposed at a predetermined position on the transfer wheel 320 such that the distance between the polishing apparatus 330 and the head guide groove 322 is within a tolerance range of the length L of the head pin.

As described above, the head device at the opposite end of the head can always manufacture a pin of a constant length using a polishing device and a transfer wheel that maintain a constant gap even if the cutting length of the pin is not constant.

Hereinafter, the method for producing a lithium battery positive electrode pin is summarized using the above-described lithium battery positive electrode pin manufacturing apparatus.

The manufacturing method includes the steps of clapping the wire 1 by the clapping jaw 110, moving the first punch holder 120 to convex forming the heading part 13 of the wire 1, and The two punch holders 220 are moved to form the heading portion 13 of the wire 1 flat, the heading portion of the wire is polished, and the opposite side of the heading portion is polished.

According to the embodiment of the present invention as described above, various effects including the following matters can be expected. However, the present invention is not achieved by exerting all of the following effects.

First, by forming the punch from a diamond material, the surface roughness of the head can always be kept constant.

In addition, by forming the head over the secondary, not only can pores be generated on the surface of the head, but also the center of the head can be more accurately aligned.

And the length of a pin can be made constant using a grinding | polishing apparatus.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

Claims (16)

In the battery positive pin manufacturing apparatus for manufacturing a battery positive pin consisting of a body and a head using a wire, A clapping jaw for clapping the wire; A first punch holder installed to move toward the clapping jaw and formed by recessing a punch accommodating portion in a portion facing the clapping jaw; And A first diamond punch inserted into the punch accommodating portion, the first diamond punch being formed by concave concave indentation in order to primary-form the wire; Battery anode pin manufacturing apparatus comprising a. The method of claim 1, An apparatus for manufacturing a battery positive electrode pin, wherein an air outlet for discharging air is formed at a recess of the first diamond punch. The method of claim 2, A first punch shell covering a portion excluding the hitting surface of the first diamond punch and formed of metal; More, The first punch outer shell is a battery positive electrode pin manufacturing apparatus, characterized in that welded and fixed to the first punch holder. The method according to any one of claims 1 to 3, A second punch holder installed to move toward the clapping jaw and formed by recessing a punch accommodating portion in a portion facing the clapping jaw; And A second diamond punch inserted into the punch accommodating portion, the second diamond punch having a flat hitting surface for secondary forming the wire; Battery anode pin manufacturing apparatus characterized in that it further comprises. The method of claim 4, wherein A second punch shell covering a portion excluding the hitting surface of the second diamond punch and formed of metal; More, The second punch outer shell is a battery positive electrode pin manufacturing apparatus, characterized in that welded and fixed to the second punch holder. A method of manufacturing a battery positive electrode pin using the battery positive electrode pin manufacturing apparatus of claim 4, The clapping jaw clapping the wire; Moving the first punch holder to convex the head of the wire; And Moving the second punch holder to form a flat head of the wire; Battery positive electrode pin manufacturing method comprising a. The method of claim 6, Polishing the head of the wire; Method for producing a battery positive electrode pin further comprising. The method of claim 7, wherein Polishing the opposite side of the head of the wire; Method for producing a battery positive electrode pin further comprising. A device for polishing the opposite end of the battery positive pin, A conveying apparatus having a head guide groove into which the head is inserted and a body seating groove into which the body of the positive pin is inserted so that the positive pin is transported in parallel; And A polishing apparatus installed at a predetermined gap from the head guide groove; Battery anode pin manufacturing apparatus comprising a. The method of claim 9, The transfer device, A transfer wheel having the head guide groove and the body seating groove formed on an outer circumference thereof; And A transfer belt for applying contact pressure toward the outside of the transfer wheel with the anode pin interposed therebetween at the position where the anode pin is polished by the polishing apparatus; Battery anode pin manufacturing apparatus comprising a. The method of claim 10, The polishing apparatus, Battery anode pin manufacturing apparatus, characterized in that formed in the shape of a wheel. The method of claim 4, wherein A transfer device having a head guide groove into which the head is inserted and a body seating groove into which the body of the positive pin is inserted so that the molded positive pin is transported in parallel; And A polishing apparatus installed at a predetermined gap from the head guide groove; Battery anode pin manufacturing apparatus characterized in that it further comprises. The method of claim 12, The transfer device, A transfer wheel having the head guide groove and the body seating groove formed on an outer circumference thereof; And A transfer belt for applying contact pressure toward the outside of the transfer wheel with the anode pin interposed therebetween at the position where the anode pin is polished by the polishing apparatus; Battery anode pin manufacturing apparatus comprising a. The method of claim 13, The polishing apparatus, Battery anode pin manufacturing apparatus, characterized in that formed in the shape of a wheel. A battery positive electrode pin prepared by the method of manufacturing a battery positive electrode pin of claim 6. A battery positive electrode pin prepared by the method of manufacturing a battery positive electrode pin of claim 8.

Images