KR101556857B1 - Manufactoring system of anode for cable type secondary battery - Google Patents

Abstract

A system for manufacturing a cathode of a secondary battery for a cable according to one embodiment of the present invention comprises: a base; a current collector supply unit placed on the base wherein the current collector supply unit supplies a cable type current collector; a coating unit for forming a slurry coating layer on an external circumference of the current collector wherein the current collector supplied from the current collector supply unit is inputted or outputted to or from the coating unit; a drying unit for drying the coating layer wherein the coating layer is arranged on an output side of the drying unit, the current collector is inputted or outputted to or from the drying unit, and the coating layer is formed on the external circumference of the current collector; and a current collector collecting unit for winding the current collector passing the drying unit to collect. The current collector vertically the coating unit and the drying unit to form the coating layer on the external circumference of the current collector at least.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cathode-

The present invention relates to a cathode manufacturing system of a cable-type secondary battery.

A secondary battery is a device that converts external electrical energy into a form of chemical energy, stores it, and produces electricity when needed. It is also called a rechargeable battery. Common secondary batteries include lead acid batteries, nickel cadmium batteries, nickel metal hydride batteries, and lithium ion batteries.

Generally, a secondary battery is a cylindrical, square, or pouch type battery. Accordingly, a certain space for mounting the secondary battery is indispensably required, and the space for mounting the secondary battery in the shape of a cylinder, a square, or a pouch has been a problem in the development of various types of portable devices.

For example, in recent years, the rapid development of wearable devices has led to an increasing demand for secondary batteries that are small in volume and free from deformations. In order to satisfy such demands, cable-type linear secondary batteries have appeared Respectively.

Korean Patent No. 10-1351901 discloses a coating method for a cable type secondary battery. According to the manufacturing method of the conventional cable-type secondary battery, particularly the coating method, it is difficult to set a desired coating thickness.

Also, since the amount of slurry that is discarded can not be used in comparison with the amount of slurry to be coated on the product, the manufacturing cost is increased.

Further, it is difficult to maintain the uniformity of the coated cross section.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems.

According to an aspect of the present invention, there is provided a negative electrode manufacturing system for a cable type secondary battery, comprising: a base; A current collecting part placed on the base and supplied with a current collector in the form of a cable; A coating unit that draws and draws a current collector supplied from the current collector supply unit and forms a slurry coating layer on an outer circumferential surface of the current collector; A drying unit disposed at an outlet side of the coating unit, the drying unit having the current collector having the coating layer formed on the outer circumferential surface thereof drawn in and out, and drying the coating layer; And a collector collecting part for collecting and collecting the collector passing through the drying part, characterized in that the collector passes through at least the coating part and the drying part in a vertical line state in order to form the coating layer on the outer circumferential surface .

According to another aspect of the present invention, there is provided a negative electrode manufacturing system for a cable-type secondary battery, comprising: a base; A current collecting part placed on the base and supplied with a current collector in the form of a cable; A tension adjuster for maintaining the tension of the current collector supplied from the current collector to a predetermined level; A primary coating unit for supplying and discharging the current collector supplied from the current collector supply unit and forming a slurry coating layer on an outer circumferential surface of the current collector; A primary drying unit disposed at an outlet side of the coating unit, the primary drying unit having the coating layer formed on the outer circumferential surface thereof for drawing and drawing the coating layer, and drying the coating layer; And a tension regulator for maintaining the tension of the current collector passing through the primary drying unit at a predetermined level; A diameter detector for measuring a coating thickness of the current collector passed through the primary drying unit; Further comprising a support wall extending from an upper surface of the base, the guide being placed on an upper end of the support wall to switch the conveying direction of the current collector; A secondary coating part for forming a slurry coating layer on an outer circumferential surface of the current collector on which the coating layer is formed; A secondary drying unit disposed at an outlet side of the secondary coating unit and having the coating layer formed on an outer circumferential surface thereof to be drawn in and drawn out and drying the coating layer; A diameter detector for measuring a coating thickness of the current collector passing through the secondary drying unit; A collector collecting part for collecting and collecting the current passing through the drying part; And a control unit for controlling the tension adjusting unit according to a value measured by the diameter detecting unit, wherein the current collector passes through at least the coating unit and the drying unit in a vertical direction to form the coating layer on the outer circumferential surface .

The cathode manufacturing system of the secondary battery according to the embodiment of the present invention has the following advantages and effects.

First, coating uniformity can be easily maintained.

Second, there is an advantage that the viscosity change of the slurry for coating is easily suppressed.

Third, there is an advantage that the coating thickness can be easily changed to a desired thickness.

Fourth, there is an advantage that the manufacturing cost is reduced because there is almost no discarded slurry.

Fifth, since the tension of the wire is controlled in real time during the wire coating process, the wire is not broken.

Sixth, there is an advantage that the roundness of the cross section of the wire after coating can be easily managed.

1 is a front view of a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention;
2 is a rear view of the manufacturing system.
3 is a side view of the manufacturing system.
4 is a configuration diagram of a current collector supplying part constituting a cathode manufacturing system of a cable-type secondary battery according to an embodiment of the present invention;
5 is a perspective view of a supply guide constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.
6 is a configuration diagram of a tension adjusting unit that constitutes a negative electrode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.
FIG. 6A is a view illustrating a process of controlling the tension of the current collector carried by the tension adjusting unit; FIG.
7 is a perspective view of an alignment unit constituting a cathode manufacturing system of a cable-type secondary battery.
7A is a schematic view showing an internal configuration of the alignment unit;
Fig. 7B is an internal structural view of the alignment unit viewed in the conveying direction of the current collector.
8 is a system diagram of a coating apparatus constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.
8A is a longitudinal sectional view of an injection unit constituting the coating apparatus.
9 is a front view of a drying unit constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.
FIG. 9A is a cross-sectional view taken along II of FIG. 9; FIG.
10 is a perspective view showing a diameter detector and a direction changing guide constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.
11 is a view showing a collector collecting part constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.

Hereinafter, a negative electrode manufacturing system and a negative electrode manufacturing process of a cable type secondary battery according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a cathode manufacturing system of a cable-type secondary battery according to an embodiment of the present invention, FIG. 2 is a rear view of the manufacturing system, and FIG. 3 is a side view of the manufacturing system.

1 to 3, a cathode manufacturing system 10 of a cable type secondary battery according to an embodiment of the present invention includes a base 11, a plate 11 extending upward from the center of the upper surface of the base 11, An electrode layer coating portion disposed on the front surface of the support wall 12 and a conductive layer coating portion disposed on a rear surface of the support wall 12. The conductive layer coating portion may be formed on the support wall 12,

Specifically, a current collector w made of a copper wire is coated with an electrode layer on the outer circumferential surface of the current collector w while passing through the electrode layer coating portion, and a conductive layer is coated on the outer circumferential surface of the electrode layer while passing through the conductive layer coating portion . Here, the conductive layer prevents the electrode layer from being damaged when the cable-type secondary battery is bent or curved. The primary electrode layer, that is, the cathode layer, is formed on the outer circumferential surface of the current collector w by the cathode manufacturing system according to the embodiment of the present invention. The secondary electrode layer, that is, the anode layer may be formed on the outer peripheral surface of the primary electrode layer while continuously passing through the manufacturing system having the same structure as the cathode manufacturing system.

The electrode layer coating unit includes a current collector supply unit 13 for supplying a current collector, a supply guide 14 for holding a supply position of the current collector w released from the current collector supply unit 13, A tension adjusting unit 15 for adjusting the tension of the current collector w guided by the guide 14, an alignment unit 18 disposed at the outlet side of the tension adjusting unit 15, A primary coating unit 19 disposed on an outlet side of the alignment unit 18 for coating an outer surface of the current collector w with an electrode slurry and a secondary coating unit 19 disposed on an outlet side of the primary coating unit 19, An alignment unit 21 disposed at an outlet side of the primary drying unit 20; a tension adjusting unit 22 and a tension adjusting unit 22; And a diameter detector 25 for detecting the diameter and roundness of the current collector w that has passed through the current collector w. The current collector w having passed through the diameter detecting portion 25 is transferred to the conductive layer coating portion along the direction change guide 26.

Here, the electrode layer coating portion and the conductive layer coating portion may be arranged in a line on one vertical line. However, since the ceiling height of the installation space in which the manufacturing system is disposed is limited, the conveyance direction of the current collector w passing through the electrode layer coating unit is switched 180 degrees . The current collector w is advantageous in that it moves in the vertical direction in the coating process rather than in the horizontal direction. If the electrode slurry or conductor slurry is coated on the outer circumferential surface of the current collector w while the current collector w moves horizontally, the cross-section of the slurry coating layer forming the outer circumferential surface of the secondary battery in the final completion step And an oval shape that is biased downward by gravity occurs. In addition, there is a problem that the current collector w is sagged downward due to gravity during the transportation. Accordingly, it is preferable that the current collector w is coated with the slurry on the outer circumferential surface while moving in the vertical direction.

The tension adjusting units 15 and 22 include tension sensing units 16 and 23 and feeder assemblies 17 and 24, respectively. The structure and function of the tension adjusting units 15 and 22 will be described in more detail with reference to the drawings.

The conductive layer coating portion disposed in the vertical direction on the rear surface of the support wall 12 includes an alignment unit 27 disposed on the other side of the direction change guide 26, A secondary drying unit 29 disposed at an outlet side of the secondary coating unit 28 and a secondary drying unit 29 disposed at an outlet side of the secondary drying unit 29, A collector 30 for collecting and collecting the collector 30 of the alignment unit 30 and a diameter detecting unit 31 disposed on the outlet side of the alignment unit 30 and a collector 32 formed with a cathode through the diameter detecting unit 31, (32). The current collecting unit 32 is reciprocated in the lateral direction by the winding auxiliary device 40 so that the current collector w is uniformly supplied to the winding roll of the current collecting unit 32 Let it roll.

Here, the alignment units 18, 21, 27, and 30 have the same structure and function. Therefore, the alignment unit 18 disposed between the current collector supply unit 13 and the primary drying unit 20 will be described as a representative example. Since the tension adjusting parts 15 and 22 have the same structure and function, the tension adjusting part 15 disposed at the outlet side of the supply guide 14 will be described as a representative example.

Since the primary drying unit 20 and the secondary drying unit 29 have the same structure and function, the primary drying unit 20 will be described as a representative example.

The alignment units 18 and 27 arranged at the entrance sides of the primary coating unit 19 and the secondary coating unit 28 can be defined as a primary alignment unit and the primary drying unit 20, And the alignment units 21 and 30 disposed on the outlet side of the secondary drying unit 29 can be defined as a secondary alignment unit.

4 is a configuration diagram of a current collector supplying part constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.

4, the current collector supply unit 13 according to the embodiment of the present invention includes a plurality of supply rolls 131 around which current collectors w are wound, A shaft support 133 for supporting the shaft 132, and a drive motor 134 for rotating the shaft 132. [

In detail, each of the plurality of supply rolls 131 has a cylindrical shape having a predetermined diameter and a predetermined width. The current collector w is wound around the outer peripheral surface of the supply roll 131. The current collector w is rolled up once from the left end of the outer circumferential surface of the supply roll 131 to the right end and then from the right end to the left end so that the current collector w is wound on the supply roll 131 on the outer circumferential surface thereof. Therefore, even when the current collector w is unwound, the left end and the right end of the supply roll 131 are released while reciprocating.

The shaft 132 rotates by the operation of the driving motor 134 and the plurality of supply rolls 131 rotate simultaneously when the shaft 132 rotates. The shaft 132 may include an air friction shaft to control the plurality of feed rolls 131 equally. The air friction shaft is designed to transmit the tension of the roll evenly even if the winding amount of the current collector w wound on each of the supply rolls 131 is different. It is a shaft that can accurately hold and minimize warpage of roll.

5 is a perspective view of a supply guide constituting a cathode manufacturing system of a cable-type secondary battery according to an embodiment of the present invention.

Referring to FIG. 5, the supply guide 14 according to the embodiment of the present invention is a positioning member that keeps the supply point of the current collector w released from the supply roll 131 constant.

The supply guide 14 may include a guide body 142 and a guide ring 141 formed at an inlet end of the guide body 142. [ When the supply roll 131 rotates, the current collector w wound on the supply roll 131 is released while reciprocating between the left end and the right end of the supply roll 131. The current collector w unwound from the supply roll 131 passes through the inside of the guide ring 141 and is inserted into a hole formed at an inlet end of the guide body 142. The inner diameter of the guide ring 141 may be smaller than the thickness d of the supply roll 131.

In more detail, a very small diameter hole corresponding to the diameter of the current collector w is formed at an inlet end of the guide body 142, and the current collector w is led into the hole. The current collector w is inserted into the hole formed at the inlet end of the guide body 142 while reciprocating by a distance corresponding to the thickness d of the supply roll 131. The thickness d of the supply roll 131 is significantly larger than the diameter of the hole. Therefore, when the current collector w is located at both ends in the thickness direction of the supply roll 131, as compared with the case where the current collector w is located at the center of the thickness of the supply roll 131, There is a high possibility that the shape is deformed due to cutting or bending. The diameter of the current collector w is highly likely to be deformed into a non-concentric circle shape due to the frictional force between the edge of the hole and the current collector w.

When the current collector w is unwound from the supply roll 131 and is drawn into the guide main body 142 as described above, the swing width of the current collector w in the vicinity of the inlet end of the guide main body 142 is You need to minimize it. In order to achieve this object, the guide ring 141 is formed at a position spaced apart from the inlet end of the guide body 142 by a predetermined distance so that the swing width of the current collector w does not exceed the set range do.

It is also possible to adopt a guide member in the form of a cone or a truncated cone in which the inside diameter is narrowed toward the entrance end of the guide body 142 in addition to the shape of the guide ring 141 shown. That is, the supply guide is considered to be within the scope of the present invention so that the current collector w is transferred from the supply roll 131 in a state close to a straight line state.

A hole having a diameter corresponding to the outer diameter of the current collector w is formed in the center of the inside of the guide body 142 in a longitudinal direction of the guide body 142. Accordingly, the current collector w guided by the guide member including the guide ring 141 or the (semi) cone is linearly transported while passing through the inside of the guide body 142.

6A and 6B are views showing a process of controlling the tension of the current collector transferred by the tension adjusting unit. FIG. 6A is a view illustrating a process of adjusting the tension of the current collector transferred by the tension adjusting unit, to be.

Referring to FIG. 6, the tension adjusting unit 15 according to the embodiment of the present invention includes a tension detecting assembly 16 and a feeder assembly 17.

In detail, in order to prevent the collector (w) of the fine wire type having a diameter of about 0.25 phi from being stretched or broken during the conveying process, the tension adjusting unit (15) So that the whole w is transferred.

More specifically, an outlet end of the supply guide 14 is connected to an inlet end of the tension sensing assembly 16, and a current collector w passing through the supply guide 14 is connected to the tension sensing assembly 16 Lt; / RTI > Then, the feeder assembly 17 is connected to the outlet end of the tension sensing assembly, and the current collector w passing through the tension sensing assembly 16 is pulled and transported.

The tension sensing assembly 16 may include first and second fixing rollers 161 and 162 and a moving roller 163 disposed between the first and second fixing rollers 161 and 162. The first fixing roller 161 and the second fixing roller 162 are disposed at a predetermined distance from each other in the conveying direction of the current collector w. The moving roller 163 is disposed at a position between the first and second fixing rollers 161 and 162 so as to be movable in a direction orthogonal to the conveying direction of the current collector w. The moving roller 163 is arranged so as to be movable in a direction approaching or away from the first and second fixing rollers 161 and 162. However, the present invention is not limited thereto. The number of the moving rollers 163, which are the same as the number of the fixing rollers 161 and 162, may be set in the moving direction of the current collector w A tension sensing assembly 16 disposed alternately with the fixing rollers 161 and 162 may be proposed.

The current collector w is placed between the moving roller 163 and the fixing rollers 161 and 162 and the outer circumferential surface of the rollers 161 to 163 is in contact with the current collector w. The outer circumferential surfaces of the rollers 161 to 163 may be recessed to a predetermined depth to accommodate the current collector w.

The feeder assembly 17 includes a pair of feeding rollers 171 which are rotated in close contact with the outer circumferential surface of the current collector w passing through the tension sensing assembly 16 to pull the current collector w A feeding motor 173 for providing power for rotating the pair of feeding rollers 171 and a gear assembly 172 disposed between the feeding motor 173 and the pair of feeding rollers 171, ). The gear assembly 172 allows rotational force provided from the rotating shaft of the feeding motor 173 to be transmitted to the rotating shaft of the pair of feeding rollers 171, respectively. The pair of feeding rollers 171 are rotated simultaneously and at the same speed by the gear assembly 172 so that the cross section of the current collector w is conveyed while maintaining a concentric circle.

6A, the pair of feeding rollers 171 are rotated by the rotation of the feeding motor 173, and the rotational force (rpm) of the feeding motor 173 is sensed by the controller 100.

Further, the moving roller 163 can be moved in either one of a direction in which the moving roller 163 approaches the fixing roller 161 or a moving direction in which the moving roller 163 moves in a direction away from the fixing roller 161 or 162 according to the feeding speed of the current collector w. For example, if the rotation speed of the feeding roller 171 is slower than the rotation speed of the feed roll 131, the tensile force of the current collector w passing through the tension sensing assembly 16 is reduced and loosened. Then, the moving roller 163 will move rightward in the figure, and the moving distance value of the moving roller 163 is sensed by a sensor (not shown). The moving distance value of the moving roller 163 sensed by the sensor is transmitted to the controller 100.

The control unit 100 resets the load of the feeding motor 173 based on the moving direction of the moving roller 163 and the moving distance value. As the number of rotations of the feeding roller 171 increases, the tensile force of the current collector w increases and becomes taut. Then, the moving roller 163 moves to the left in the drawing and comes to a set position. In this way, the controller 100 adjusts the load of the feeding motor 173 according to the moving direction and the moving distance of the moving roller 163, so that the tension of the current collector w is kept constant.

Fig. 7 is a perspective view of an alignment unit constituting a cathode manufacturing system of a cable-type secondary battery, Fig. 7 (a) is a schematic view showing the internal configuration of the alignment unit, Fig.

Referring to FIG. 7, the alignment unit 18 according to the embodiment of the present invention may be located at the outlet end of the tension regulating unit 15. FIG.

In detail, the alignment unit 18 is disposed at the inlet side of the coating units 19 and 28 and the outlet side of the drying units 20 and 29 to maintain the linear state of the current collector w, ) To the correct position. For example, the alignment unit 18 may be disposed on the inlet side of the coating portion 19, 28 and may include a straight line connecting the inlet to the outlet of the coating portion 19, And functions to align the current collector w so that the current collector w is placed on a straight line.

Further, the current collector w passing through the drying units 20 and 29 is maintained in a straight state, and is transferred to the next step.

Referring to FIG. 7A, the alignment unit 18 may include a case 181 and a plurality of straight line retaining rollers 182 disposed inside the case 181.

More specifically, the plurality of linear retention rollers 182 may be spaced apart from each other by a predetermined distance in the transport direction of the current collector w passing through the case 181. The outer circumferential surfaces of the plurality of straight line retention rollers 182 are in contact with the current collector w.

The plurality of straight line retention rollers 182 may be spaced apart from each other by a predetermined distance in the direction of conveyance of the current collector w at a position surrounding left and right side surfaces and upper and lower side surfaces of the current collector w, respectively. Alternatively, a pair of rollers wrapping the left and right sides of the current collector w may be positioned opposite to each other, and a pair of rollers surrounding the upper and lower surfaces of the current collector w may face each other You can also place it in a viewing location.

According to this configuration, the current collector w is transferred in a state of being in contact with the outer peripheral surfaces of the plurality of linear retention rollers 182, so that the current collector w is in a linear state inside the alignment unit 18 .

FIG. 8 is a system diagram of a coating apparatus constituting a cathode production system of a cable-type secondary battery according to an embodiment of the present invention, and FIG. 8A is a longitudinal sectional view of an injection unit constituting the coating apparatus.

8, a coating apparatus 50 according to an embodiment of the present invention includes a slurry tank 54 in which a slurry for coating is stored, a supply pump 54 for supplying a coating slurry stored in the slurry tank 54, A flow control valve 52 for controlling the flow rate of the coating slurry supplied from the supply pump 53, an opening / closing valve 56 for opening / closing the outlet of the flow control valve 52, And an injection unit 51 disposed at an outlet end of the valve 56. The slurry tank 54, the feed pump 53, and the flow control valve 52 may be fluidly connected by a supply pipe 55. The supply pump 53 is a mono pump and can always supply the slurry to the injection unit 51 without pulsating phenomenon uniformly.

The coating slurry supplied to the injection unit 51 is coated on the outer circumferential surface of the current collector w passing through the injection unit 51. The primary coating part 19 and the secondary coating part (28) may include the injection unit (51), the on-off valve (56), and the flow control valve (52). Specifically, each of the primary coating unit 19 and the secondary coating unit 28 may be regarded as including only the phosphorus section unit 51. The primary coating unit 19 and the secondary coating unit 28 have the same structure and function, and an end tip (to be described later), in which the current collector w coated with the coating slurry is drawn out, There is a difference only in the inner diameter. That is, the diameter of the end tip of the injection unit 51 corresponding to the secondary coating portion 28 is formed to be slightly larger than the diameter of the end tip of the injection unit 51 corresponding to the primary coating portion 19 do. This is because the current collector w coated with the coating slurry is coated again while passing through the secondary coating portion 28.

The injection unit 51 includes a wire guide 514 having a straight passage through which the current collector w passes, an end tip 513 coupled to an end of the wire guide 514, An injection tank 511 for collecting the coating slurry supplied from the slurry tank 54 and an injection chamber 512 extending from the injection tank 511 and connecting the inlet end of the end tip 513 . The passage through which the current collector w passes is formed so as to pass through the center of the end tip 513.

An injection channel 512a is formed in the injection chamber 512. One end of the injection chamber 512 is connected to the outlet end of the injection tank 511 and the other end of the injection chamber 512 is connected to the end of the end tip 513. [ And is connected to the inlet side. That is, at the inlet side of the end tip 513, the passage of the current collector w and the injection passage 512a communicate with each other to form a coating region 512b. Therefore, when the current collector w passes through the coating area 512b, the coating slurry supplied through the injection path 512a is coated on the outer circumferential surface of the current collector w and coated.

Since the alignment unit 18 is disposed at the inlet side of the injection unit 51, the current collector w can be drawn in a straight line. The material layer that is primarily coated on the outer circumferential surface of the current collector w is a cathode electrode layer including graphite and has a thickness of about 100 micrometers on the outer circumferential surface of the current collector w having a diameter of about 0.25 mm. do. The layer of material coated in the secondary coating 28 is coated on the polymer layer to a thickness of about 6 to 7 micrometers. Since the primary coating layer is related to the output of the battery in the cable-type secondary battery, the primary coating layer can have an appropriate thickness. The secondary coating layer is coated for the purpose of preventing damage to the primary coating layer, and it is advantageous that the coating is as thin as possible. However, when the coating is thinly coated to a thickness of 5 micrometers or less, there is a problem that the primary coating layer can not be adequately protected.

The end tip 513 is formed at the discharge port of the injection unit 51 so that the current collector w coated with the electrode layer in the coating area 512b passes through the end tip 513, And is drawn out from the injection unit 51 while maintaining a constant thickness.

Further, when the coating slurry is coated on the outer circumferential surface of the current collector w in the injection unit 51, the contact with the outside air is blocked, thereby preventing the viscosity of the slurry from changing. That is, since the viscosity change of the slurry can be minimized, it is possible to maintain a coating quality higher than a certain level.

FIG. 9 is a front view of a drying unit constituting a cathode manufacturing system of a cable-type secondary battery according to an embodiment of the present invention, and FIG. 9A is a cross-sectional view taken along line I-I of FIG.

9 and 9A, a drying unit 60 according to an embodiment of the present invention is provided for drying a current collector w coated with slurry while passing through the injection unit 51 using hot air do.

In detail, the primary and secondary drying units 20 and 29 may include the drying unit 60. The drying unit 60 includes an inlet header 61 on which an inlet port 611 for introducing hot air is formed, a discharge header 62 on which a discharge port 621 for discharging hot air is formed, And a drying chamber 63 to which the header 61 and the discharge side header 62 are attached to the opposite sides.

More specifically, a drying space through which hot air flowing through the inlet port 611 flows is formed in the drying chamber 63, and the current collector w passes through the drying chamber 63. The drying unit 60 may be designed so that hot air flows in a direction opposite to a direction in which the current collector w is conveyed in the drying chamber 63. [

For example, when the coated current collector w passes through the inside of the drying chamber 63 and is transported from the lower end of the drying chamber 63 to the upper end, the inlet header 61 is dried And the discharge side header 62 may be coupled to the lower end of the drying chamber 63. [ The moving direction of the current collector w and the flowing direction of the hot air are opposite to each other so that the outer circumferential surface of the current collector w is coated with the hot air, There is an advantage that heat exchange efficiency between the electrode layer or the conductive layer and the hot air is improved.

On the other hand, in order to shorten the drying time and improve the quality of the electrode of the coating layer, a separate heater 64 for emitting infrared rays may be disposed around the current collector w. In detail, in this embodiment, four heaters 64 are arranged around the current collector w in parallel with the current collector w. Here, it is to be noted that the number of heaters 64 disposed around one current collector w is not limited to the illustrated embodiment.

In order to prevent foreign substances from flowing into the drying chamber 63 and adhering to the coating layer of the current collector w during the inflow of hot air into the drying chamber 63, A filter for filtering foreign matters may be mounted. The filter may include a HEPA filter.

10 is a perspective view showing a diameter detecting unit and a direction changing guide that constitute a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.

Referring to FIG. 10, the outer diameter and roundness of the coated slurry are measured while passing through the diameter detecting portion 25 of the current collector w having been coated and dried.

More specifically, the diameter detector 25 is a noncontact type diameter detecting device that irradiates laser light outside the current collector w to measure the outer diameter (or thickness) and the roundness of the coating layer coated on the outer circumferential surface of the current collector w And transmits the measured value to the controller 100. [

The diameter detecting portion 25 may include a body portion 251 attached to the support wall 12 and a plurality of laser irradiating portions 252 disposed at an end portion of the body portion 251. The plurality of laser irradiation units 252 may include three laser irradiation units 252. The three laser irradiating units 252 are arranged at intervals of 120 degrees in the circumferential direction from the outside of the current collector w so as to irradiate the laser beam to the outer circumferential surface of the current collector w. However, it is also possible that two or less or four or more laser irradiation units 252 are disposed around the current collector w.

It is to be noted that the diameter detector 25 is not limited to the embodiment shown and all measurement means capable of measuring the outer diameter and roundness of the coating layer without directly contacting the collector w are applicable.

The diameter detecting portion 31 disposed on the outlet side of the secondary coating portion 29 is also the same product as the diameter detecting portion 25 described above, and a duplicate description thereof will be omitted.

The direction changing guide 26 includes a first switching roller 261 disposed on the front side of the supporting wall 12 and a second switching roller 262 disposed on the rear side of the supporting wall 12, And a roller support portion 263 fixed to the upper end of the support wall 12. In detail, the first changeover roller 261 and the second changeover roller 262 may be rotatably connected to the front end and the rear end of the roller support portion 263, respectively.

The flow direction of the current collector w having passed through the diameter detecting portion 25 is switched 180 degrees by the first switching roller 261 and the second switching roller 262. If the production system according to the embodiment of the present invention can vertically line up from the current collecting part 13 to the current collecting part 32, the direction changing guide 26 may not be necessary.

11 is a view showing a collector collecting part constituting a cathode manufacturing system of a cable type secondary battery according to an embodiment of the present invention.

11, the collector collecting part 32 according to the embodiment of the present invention includes a shaft 322, a take-up roll 321 mounted on the outer circumferential surface of the shaft 322, And a driving motor 324 that rotates the shaft 322. The shaft 322 rotatably supports the shaft 322,

The structure of the collector collecting portion 32 is the same as that of the collector supplying portion 13. In particular, the shaft 322 may be an air friction shaft such as the shaft 132 of the current collector supply unit 13.

Here, in the case of the current collector supply unit 13, the shaft 132 is fixed to the base 11 so that the shaft 132 can rotate but can not move horizontally. Thus, when the current collector w is unwound from the supply roll 131, the current collector w is unwound while moving in the left-right direction.

The current collector w is reciprocated in the width direction of the winding roll 321 for winding and planarization even when the current collector w having the negative electrode formed thereon is wound around the winding roll 321, . However, the current collector w formed with the coating layer is wound around the winding roll 321 while being maintained in a straight line, which is advantageous in terms of quality.

To this end, it is necessary to make the current collecting unit 32 itself move on the base 11. A winding auxiliary device (40) is provided at one side edge of the current collector (32) to cause movement of the current collector (32).

In detail, the hoisting assisting device 40 causes the winding roll 321 to repeatedly advance and retract (move leftward and rightward in the figure) in the longitudinal direction of the shaft 322. Then, the current collector w moves linearly along the transfer line and is wound flat on the winding roll 321.

The winding auxiliary device 40 includes a housing 41 fixed to the upper surface of the base 11, a cylinder 42 which can be drawn out from the housing 41, and a connector 42 connected to the end of the cylinder 42. [ (43). The connector 43 is fixedly coupled to the cylinder 42 and the sharp support 323. The cylinder 42 may be pulled out of the housing 41 or drawn into the housing 41 by hydraulic or pneumatic pressure.

According to this structure, when the coated current collector w is wound on the winding roll 321, the winding roll 321 reciprocates in the longitudinal direction of the shaft 322, so that the current collector w Is uniformly wound on the winding roll 321. [

On the other hand, means for making the current collecting portion 32 linearly reciprocally movable on a horizontal plane is required. In detail, a slide rail 111 is mounted on the upper surface of the base, and a slider 112 is mounted on the lower end of the shaft support 323. [ The slider 112 is coupled to the slide rail 111 and slides along the slide rail 111. When the winding collector device 40 pushes or pulls the collector collecting part 32 by the sliding structure, the collector collecting part 32 is moved along the slide rail 111 on the upper surface of the base 11 Thereby making a linear reciprocating motion.

The negative electrode manufacturing process in the negative electrode manufacturing system of the cable-type secondary battery having the above-described structure will be described below in order.

A copper wire-shaped current collector w wound on a supply roll 131 of the current collector supply unit 13 is guided to the supply guide 14 while being unwound. The current collector w guided by the supply guide 14 is transferred while maintaining a tension of a predetermined level or higher while passing through the tension adjusting unit 15. [ The current collector w passing through the tension adjusting unit 15 passes through the alignment unit 18 and the current collector w maintains a linear state by the alignment unit 18, And is guided to the coating portion 19.

Also, the current collector w is coated with the electrode layer by the electrode slurry on the outer peripheral surface while passing through the primary coating portion 19. The current collector passing through the primary coating unit 19 is dried while passing through the primary drying unit 20. [ The current collector w having passed through the primary drying section 20 passes through the alignment unit 21 and the tension regulating section 23 in order.

Alignment units 18 and 21 are mounted on the inlet and outlet sides of the primary drying unit 20 so that the current collector w passes through the primary drying unit 20 while maintaining the linear state do.

On the other hand, the current collector w having passed through the tension adjusting part 22 measures the thickness and roundness of the electrode layer in the diameter detecting part 25. After passing through the diameter detecting portion 25 and passing through the direction changing guide 26, the feeding direction is switched 180 degrees. That is, the current collector w is moved downward along the back surface of the support wall 12.

The current collector w having passed through the direction changing guide 26 is guided to the secondary coating unit 28 after passing through the alignment unit 27. As the current collector w passes through the secondary coating portion 28, a conductive layer is coated on the outer circumferential surface of the electrode layer. The current collector w having passed through the secondary coating portion 28 is dried while passing through the secondary drying portion 29 and passes through the alignment unit 30 and the diameter detecting portion 31, And is wound on the roll roll 321 of the recovery section 32.

Alignment units 27 and 30 are disposed at the entrance side and the exit side of the secondary coating portion 28 so that the secondary coating portion 28 and the secondary coating portion 28 And is guided to pass through the car dryer 29.

Further, the thickness and the roundness of the conductive layer are measured while the collector (w) passes through the diameter detecting portion (31). The measured thickness and roundness values are transmitted to the controller 100 and the controller 100 controls driving of the feeder assemblies 17 and 24 of the tension adjusting units 15 and 22 so as to be coated with a normal thickness .

When the current collecting unit 32 having the negative electrode is wound on the winding roll 321 after the coating process is finished, the collector collecting unit 32 is moved in the left and right directions So that the current collector w is uniformly and flatly wound on the winding roll 321.

Claims (26)

Base;
A current collecting part placed on the base and supplied with a current collector in the form of a cable;
A coating unit that draws and draws a current collector supplied from the current collector supply unit and forms a slurry coating layer on an outer circumferential surface of the current collector;
A drying unit disposed at an outlet side of the coating unit, the drying unit having the current collector having the coating layer formed on the outer circumferential surface thereof drawn in and out, and drying the coating layer; And
And a collector collecting part for collecting and collecting the collector passing through the drying part,
Wherein the current collector passes through at least the coating portion and the drying portion in a vertical line state in order to form the coating layer on the outer circumferential surface. The method according to claim 1,
The coating portion may include:
A primary coating unit coating an electrode layer on an outer circumferential surface of the current collector,
And a secondary coating part for drawing the current passing through the primary coating part and coating the conductive layer on the outer circumferential surface of the electrode layer. 3. The method of claim 2,
The drying unit includes:
A primary drying unit disposed at an outlet side of the primary coating unit,
And a secondary drying unit disposed at an outlet side of the secondary coating unit. The method of claim 3,
A first alignment unit disposed at an inlet side of the primary coating unit and an inlet side of the secondary coating unit and performing a position alignment and a straight line maintenance function of the current collector entering the primary coating unit and the secondary coating unit,
Further comprising a second alignment unit disposed at an outlet side of the primary drying unit and the secondary drying unit and functioning to pass the current collector through the primary drying unit and the secondary drying unit in a vertical line state, A cathode manufacturing system for a battery. 5. The method of claim 4,
Further comprising a tension adjusting unit disposed at an inlet side of the first alignment unit and configured to maintain a tensile force of the current collector at a predetermined level,
The tension adjusting unit may include:
A feeder assembly including a pair of feeding rollers for feeding the current collector and a feeding motor for driving the feeding rollers,
And a tension detector for detecting a change in tension of the current collector at an inlet side of the feeder assembly. 6. The method of claim 5,
And a control unit for receiving a tension change value of the current collector sensed by the tension sensing unit and controlling driving of the feeding motor corresponding to the received tension change value. The method according to claim 6,
The tension sensing unit may include:
A plurality of fixing rollers disposed at intervals in the conveying direction of the current collector to guide conveyance of the current collector;
And one or more moving rollers disposed between the plurality of fixing rollers,
Wherein the moving roller and the fixing roller are disposed opposite to each other with respect to the current collector. 8. The method of claim 7,
Wherein the moving roller is movable in a direction perpendicular to a feeding direction of the current collector in accordance with a change in tension of the current collector being fed,
And moves in a direction toward or away from the fixed roller in accordance with a change in tension of the current collector. 9. The method of claim 8,
When the moving roller moves from a set point toward a direction closer to the fixed roller, the rotating speed of the feeding roller is increased to increase the tension of the current collector,
Wherein the rotating speed of the driven roller is reduced when the moving roller moves in a direction away from the fixed roller from the set point, thereby reducing the tension of the current collector. The method according to claim 1,
Wherein each of the current collecting unit and the current collecting unit includes:
A roll unwinding or winding the current collector,
A shaft passing through the center of the roll to rotate the roll,
A drive motor for supplying rotational force to the shaft,
And a shaft support for supporting the shaft in a horizontal state. 11. The method of claim 10,
A winding auxiliary device connected to a shaft support of the current collecting part to horizontally reciprocate the current collecting part,
A slide rail disposed on an upper surface of the base,
And a slider provided at a lower end of the shaft support of the collector collecting portion and moving along the slide rail. 12. The method of claim 11,
The winding auxiliary device comprises:
A housing fixed to the base,
A cylinder which is drawn out from the housing or introduced into the housing,
And a connector formed at an end of the cylinder and connected to a shaft support of the collector collecting part. The method of claim 3,
Further comprising a support wall extending from an upper surface of the base,
Wherein the primary coating portion and the primary drying portion are vertically arranged on the front surface of the support wall,
Wherein the secondary coating portion and the secondary drying portion are vertically disposed on a rear surface of the support wall. 14. The method of claim 13,
Further comprising a direction changing guide which is placed on an upper end of the support wall to switch the conveying direction so that the current collector vertically upwardly conveyed is vertically downwardly conveyed. The method according to claim 1,
Wherein the coating unit includes an injection unit for applying a slurry to an outer circumferential surface of the current collector vertically transported,
The injection unit includes:
A wire guide in which a guide hole is formed in a vertical line shape so that the current collector moves vertically,
An end tip coupled to an end of the wire guide,
An injection chamber connected to a side surface of the wire guide corresponding to an inlet of the end tip to form an injection passage for supplying slurry,
And an injection tank formed at an inlet side of the injection chamber and storing the slurry. 16. The method of claim 15,
Wherein an end portion of the injection path forms a coating region at an inlet side of the end tip in communication with the guide hole. The method according to claim 1,
The drying unit includes:
A drying chamber in which the current collector passes vertically,
An inlet header connected to one end of the drying chamber for introducing dry air into the drying chamber,
And a discharge side header connected to the other end of the drying chamber for discharging dry air in the drying chamber to the outside. 18. The method of claim 17,
Further comprising one or more heaters vertically disposed in the periphery of the current collector inside the drying chamber. The method according to claim 1,
And a diameter detector for detecting the thickness or roundness of the coating layer at the outlet side of the drying unit. 20. The method of claim 19,
The diameter detecting unit
A body part,
And a laser irradiation unit provided in the body part and irradiating a laser to the current collector. 20. The method of claim 19,
A feeder assembly including a pair of feeding rollers for feeding the current collector and a feeding motor for driving the feeding rollers;
Further comprising a control unit for controlling driving of the feeding motor,
And the measured value detected by the diameter detecting unit is transmitted to the control unit. Base;
A current collecting part placed on the base and supplied with a current collector in the form of a cable;
A tension adjuster for maintaining the tension of the current collector supplied from the current collector to a predetermined level;
A primary coating unit for supplying and discharging the current collector supplied from the current collector supply unit and forming a slurry coating layer on an outer circumferential surface of the current collector;
A primary drying unit disposed at an outlet side of the coating unit, the primary drying unit having the coating layer formed on the outer circumferential surface thereof for drawing and drawing the coating layer, and drying the coating layer; And
A tension regulating unit for maintaining a tension of the current collector passing through the primary drying unit at a predetermined level;
A diameter detector for measuring a coating thickness of the current collector passed through the primary drying unit;
Further comprising a support wall extending from an upper surface of the base, the guide being placed on an upper end of the support wall to switch the conveying direction of the current collector;
A secondary coating part for forming a slurry coating layer on an outer circumferential surface of the current collector on which the coating layer is formed;
A secondary drying unit disposed at an outlet side of the secondary coating unit and having the coating layer formed on an outer circumferential surface thereof to be drawn in and drawn out and drying the coating layer;
A diameter detector for measuring a coating thickness of the current collector passing through the secondary drying unit;
A collector collecting part for collecting and collecting the current passing through the drying part;
And a control unit for controlling the tension adjusting unit according to a value measured by the diameter detecting unit,
Wherein the current collector passes through at least the coating portion and the drying portion in the vertical direction so as to form the coating layer on the outer circumferential surface. 23. The method of claim 22,
Wherein the primary and secondary coating portions include an injection unit for applying a slurry to an outer peripheral surface of the current collector,
The injection unit includes:
A wire guide having a guide hole through which the current collector passes,
An end tip coupled to an end of the wire guide,
An injection chamber connected to a side surface of the wire guide corresponding to an inlet of the end tip to form an injection passage for supplying slurry,
And an injection tank formed at an inlet side of the injection chamber and storing the slurry. 24. The method of claim 23,
Wherein an end portion of the injection path forms a coating region at an inlet side of the end tip in communication with the guide hole. 23. The method of claim 22,
A first alignment unit disposed at an inlet side of the primary coating unit and an inlet side of the secondary coating unit and performing a position alignment and a straight line maintenance function of the current collector entering the primary and secondary coating units,
Further comprising a second alignment unit disposed at an outlet side of the primary drying unit and the secondary drying unit and functioning to pass the current collector through the primary drying unit and the secondary drying unit in a vertical line state, A cathode manufacturing system for a battery. 23. The method of claim 22,
The tension adjusting unit may include:
A feeder assembly including a pair of feeding rollers for feeding the current collector and a feeding motor for driving the feeding rollers,
And a tension detector for detecting a change in tension of the current collector at an inlet side of the feeder assembly.

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