KR102620936B1 - Roll to roll carrying system of copper coated cell pouch film for 2nd battery - Google Patents

Abstract

The present invention relates to a secondary battery, and allows a thin polyethylene terephthalate resin (PET) film in the form of a thin film to be conveyed in a state without wrinkles, tears, or meandering, so that metal materials such as copper are uneven. It ensures that the film material is plated with a thin film of uniform thickness without any blemishes, and the film material on which the metal thin film plating is completed is returned in a state that is not tortuous, wrinkled, bent, or torn, thereby increasing the productivity and yield of copper-plated ultra-thin film materials for secondary batteries. This relates to a roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film material that maintains uniform quality by lowering production costs and reducing defects. PET film with an average thickness of 4 micrometers is placed on one or more flat conveyor roller modules. a film unwinding unit that unwraps and conveys the film into a flat flat surface without wrinkles in the front, back, left and right directions; A pre-processing unit that cleans the PET film, which is spread and conveyed from the film unwinding unit into a flat plate without wrinkles in the front, rear, left, and right directions by one or more flat conveying roller modules; The PET film, which is conveyed from the preprocessing unit by spreading it into a flat plate without wrinkles in the front, rear, left and right directions by one or more flat conveying roller modules, is repeatedly plated with ionized copper by sputtering in a low pressure environment of 1/1000 mmHg or less. A plating unit that generates a plating film; A post-processing washing and drying unit that cleans and anti-rusts the copper plating film, which is conveyed from the plating unit by spreading it in a flat flat state without wrinkles in the front, rear, left and right directions by one or more flat transfer roller modules, and removing moisture and drying it with hot air; A film in which the copper-plated film, which is conveyed from the post-processing washing and drying unit in a flat flat shape without wrinkles in the front, left, and right directions by one or more flat conveying roller modules, is stretched and rolled into a flat flat shape without wrinkles in the front, left, and right directions. Due to the feature of including a winding part, the PET film in the form of a thin film of a secondary battery is supplied in a flat flat form without wrinkles in the front, left, and right directions, and the copper thin film is plated with a uniform thickness, so that no defects occur and high productivity or yield is achieved during copper plating. It is effective in producing thin film materials.

Description

Secondary battery copper-plated ultra-thin film material roll-to-roll carrying system {Roll to roll carrying system of copper coated cell pouch film for 2nd battery}

The present invention relates to a roll-to-roll conveyance system for a secondary battery copper-plated ultra-thin film material, and more specifically, a thin polyethylene terephthalate resin (PET) film in the form of a thin film that does not wrinkle, meander, bend, or tear. Because it is carried in its original state, metal materials such as copper (Cu) are plated into a thin film of uniform thickness without any deviation. In addition, the film material on which the metal thin film has been plated is not wrinkled, meandering, bent, or torn. A roll-to-roll transport system for secondary battery copper-plated ultra-thin film material that increases productivity and yield of secondary battery copper-plated ultra-thin film material by transporting it in an undamaged state, lowers manufacturing production costs, and reduces defects, thereby maintaining uniform quality. It's about.

Secondary batteries are eco-friendly electrical energy devices that protect the natural environment through recycling by repeating the process of inputting, storing, and outputting electrical energy through charging and discharging.

In addition, secondary batteries (secondary batteries) have the advantage of being lightweight and having high energy density that can store a lot of energy, making them the core of the future new growth power industry. They not only supply operating power for IT devices, but are also used in electric vehicles, energy storage devices, and electric vehicles. Its importance is emerging for supplying operating power in various application fields such as robots and satellites.

Secondary batteries are composed of an anode material, a cathode material, a separator, an electrolyte, and an exterior material or ultra-thin plate, and are divided into can type and pouch type depending on the type of exterior material.

For example, a pouch-type lithium secondary battery has a structure in which the battery cell is built into an aluminum laminate film composed of an aluminum thin film and a polymer film, and the aluminum laminate film serves to protect the battery cell from oxygen, moisture, and shock from the outside. . This pouch-type lithium secondary battery can be miniaturized and thinned, and has characteristics that make it easy to implement large-area and high-output characteristics. The metal film applied to the pouch-type lithium secondary battery was manufactured by a roll-to-roll method using a gravure plating machine as disclosed in Korean Patent Registration No. 10-1984889.

A prior technology that partially resolves this need is ‘Battery cell pouch film and method of manufacturing the same’ under Korean Patent Registration No. 10-1984889 (May 27, 2019).

Figure 1 is a functional configuration diagram of a secondary battery cell pouch film material metal layer production system according to an embodiment of the prior art.

Hereinafter, the prior art will be described in detail with reference to the attached drawings. A stainless steel film (S) wound in a roll with a thickness of 40 to 55 micrometers (㎛), preferably 50 ㎛, is heated at a temperature in the heating zone (Z). In addition to heating at 40 to 80 ℃, it is transferred into the heating room (R) and heat is applied at a temperature of 40 to 80 ℃ with a heating roll (100).

Here, the heating zone (Z) and the heating room (R) are closed spaces formed by a cover surrounding the stainless steel film (S), and if the space containing the entire facility maintains the corresponding temperature, the heating zone (Z) and The heating room (R) can be an open space.

The heating zone (Z) heats the 50 ㎛ thick stainless steel film (S) using a method selected from corona treatment, hot air heater, ceramic heater, plasma treatment, infrared treatment, and high frequency heating method. The heating roll 100 is disposed below the stainless steel film (S) and heats the stainless steel film (S) while structurally supporting it.

The gravure plating machine 200 uniformly applies a primer coating to the surface of the stainless steel film S.

The above prior art is suitable for producing a secondary battery cell pouch film-type metal layer made of stainless steel, but has a problem in that it is not suitable for producing a copper-plated ultra-thin film-type material.

Therefore, copper material of uniform thickness is plated on the thin film PET film with minimal deviation, and in the production of copper-plated ultra-thin film material for secondary batteries with high productivity and uniform quality, productivity is increased by reducing production costs and defect rates, and uniformity is achieved. There is a need to develop mass production technology to improve quality.

The present invention, which was devised to solve the problems and necessities of the prior art as described above, is a thin film-type PET film of a secondary battery that is wrinkled in the front, rear, left, and right directions and is taut without wrinkles, meandering, bending, or tearing. One of the purposes pursued is to provide a roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film material, which is supplied and plated with a uniform thickness of copper thin film to produce copper-plated ultra-thin film material with a low defect occurrence rate.

Meanwhile, the present invention is a secondary battery copper plating method that prevents defects from occurring during the winding process by tightly winding or unwinding a PET film for secondary batteries with a copper thin film plated by sputtering tightly without wrinkles in the front, rear, left, and right directions. One of the goals pursued is to provide a roll-to-roll conveyance system for ultra-thin film materials.

The roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film materials of the present invention, which was developed to achieve the above object, deposits a copper (Cu) film with a thickness of 1,500 to 2,000 angstroms (Å) through a stuttering process. A film unwinding unit (1000) that unfolds and conveys a PET film with an average thickness of 4 micrometers into a flat plate without wrinkles in the front, rear, left and right directions by one or more flat conveying roller modules (7000) and conveys it; A pre-processing unit 2000 that cleans the PET film, which is spread and conveyed from the film unwinding unit 1000 into a flat plate without wrinkles in the front, rear, left and right directions by one or more flat conveying roller modules 7000; Copper ionized in a low-pressure environment of 1/1000 mmHg or less is added to the PET film, which is spread and conveyed from the preprocessing unit 2000 into a flat flat surface without wrinkles in the front, rear, left, and right directions by one or more flat conveying roller modules 7000. A plating unit 3000 that generates a copper plating film by repeatedly plating using a sputtering method; The copper plating film, which is spread out and returned from the plating unit 3000 in a flat flat state without wrinkles in the front, rear, left and right directions by one or more flat transfer roller modules 7000, is washed, treated for rust prevention, removed from moisture, and dried with hot air. Post-treatment washing and drying unit (4000); The copper plated film, which is spread and conveyed from the post-treatment washing and drying unit 4000 into a flat plate without wrinkles in the front, left, and right directions by one or more flat conveying roller modules 7000, is flat without any wrinkles in the front, left, and right directions. A film winding unit (5000) that unfolds and winds in a flat state; may include.

The flat conveyor roller module 7000 is formed by engraving a groove of a predetermined depth along a spiral shape that is symmetrical in the opposite direction toward both ends at the middle portion of the longitudinal direction of the cylindrical outer peripheral surface. It is a free bearing type and rotates by an external force and rotates on the left and right sides. Each central axis at the right end has a central axis position value adjusted up, down, left, and right, and a conveying roller unit (7100) with a hardness coefficient in the range of 65 to 69; The conveying roller unit 7100 is installed adjacent to a selected one of the upper and lower parts in the vertical direction of the conveying roller unit 7100 at a predetermined interval, and rotates by generating rotational power according to a corresponding control signal from the central control unit 6000. ) a power roller unit (7200) that rotates by friction with a friction coefficient of 0.3 to 0.8; may include.

The conveying roller unit 7100 has a cylindrical shape, has a hardness coefficient in the range of 65 to 69, and includes a conveying cylindrical body portion 7110 having a smooth surface; Along the outer peripheral surface of the conveying cylindrical body portion 7110, a spiral groove symmetrical in the opposite direction from the middle portion in the longitudinal direction toward both ends is 0.3 to 0.5 micrometer deep in the middle portion and 0.5 to 0.8 micrometer deep in the outer end portion. A flat conveying groove (7120) formed by; A body rotation axis (7130) that forms the rotation center axis of the conveying cylindrical body portion (7110) and protrudes from both ends, respectively; A rotation center control unit 7140 that fixes the body rotation axis 7130 in a rotational state and moves the rotation axis up, down, left and right in the range of 0.3 to 0.8 micrometers from the rotation center by an external manipulation signal; may include.

The rotation center control unit 7140 includes a ball bearing unit 7141 on which the body rotation axis 7130 is fixedly installed in a rotational state; A bearing fixing part 7142 in which the ball bearing part 7141 is fixedly installed at a central position; A movable bracket (7143) on which the bearing fixing part (7142) is fixedly installed at a central position and moves up, down, left and right in response to an external manipulation signal; A fixing bracket (7144) fixed to a corresponding wall of the secondary battery copper-plated ultra-thin film material roll-to-roll transport system; A left movement control unit 7145 is fixedly installed at the left position of the fixing bracket 7144 and pushes and supports the movable bracket 7143 to the right by an external operation signal; A right movement control unit (7146) is fixedly installed at the right position of the fixing bracket (7144) and supports the movement bracket (7143) by pushing it to the left in response to an external operation signal; An upper movement control unit 7147 that is fixedly installed at an upper position of the fixing bracket 7144 and pushes and supports the movable bracket 7143 in a downward direction by an external manipulation signal; A lower movement control unit 7148 that is fixedly installed at a lower position of the fixing bracket 7144 and supports the movable bracket 7143 by pushing it upward in response to an external manipulation signal; may include.

A central control unit (6000) that connects to each functional unit provided in the secondary battery copper-plated ultra-thin film material roll-to-roll transport system, outputs corresponding control signals, and monitors the operating status; It may further include.

The preprocessing unit 2000 spreads the PET film supplied from the film unwinding unit 1000 into a flat plate without wrinkles in the front, rear, left, and right directions, and subjects it to water flowing at an average temperature of 26 degrees Celsius and a flow rate of 1.5 m per unit per second. A pre-treatment cleaning unit (2100) that cleans both the upper and lower surfaces by immersing them for 1.5 seconds; may include.

The plating unit 3000 applies 20 to 20% of ionized copper in a low-pressure environment of 1/1000 mmHg or less to one side of the PET film, which is supplied from the pre-processing unit 2000 in a flat, flat form without wrinkles in the front, rear, left, and right directions. A first plating unit 3100 that performs primary plating for 30 seconds to create a single-sided plating film; Ionized copper is applied in a low-pressure environment of 1/1000 mmHg or less to the other side of the single-sided plating film, which is supplied from the first plating unit 3100 in a flat, flat form without wrinkles in the front, rear, left, and right directions for 20 to 30 seconds. A second plating unit 3200 that performs secondary plating to produce a copper plating film deposited on both sides; may include.

The post-processing washing and drying unit 4000 distributes the copper plating film, which is supplied from the plating unit 3000 in a flat, flat form without wrinkles in the front, rear, left and right directions, in water flowing at an average temperature of 26 degrees Celsius and a flow rate of 1.5 m per second. A post-processing cleaning unit (4100) that cleans both the upper and lower surfaces by immersing them for an average of 1 to 1.5 seconds; A post-processing drying unit (4200) that dries the copper-plated film, which is supplied from the post-processing washing unit (4100) in a flat, flat form without wrinkles in the front, back, left and right directions, by allowing it to stay in an environment of 80°C to 100°C for 10 to 15 seconds. ; may include.

In the present invention with the above configuration, the PET film in the form of a thin film for a secondary battery is supplied in a flat (flat) flat form without being wrinkled (wrinkled) in the front, left, and right directions, and the copper thin film is plated with a uniform thickness, thereby improving productivity or productivity without causing defects. It has the advantage of producing copper-plated ultra-thin film materials with high yield.

Meanwhile, the present invention unwinds the copper-plated ultra-thin film material on which the copper thin-film plating of secondary batteries has been completed in a flat, flat state without wrinkles or wrinkles in the front, rear, left, and right directions to prevent defects from occurring during the winding process, resulting in high yield. It has the advantage of lowering production costs and expanding the distribution of secondary batteries.

Figure 1 is a functional configuration diagram of a secondary battery copper-plated ultra-thin film material metal layer production system according to an embodiment of the prior art;
Figure 2 is a functional configuration diagram of a roll-to-roll transport system for secondary battery copper-plated ultra-thin film material according to an embodiment of the present invention;
Figure 3 is a detailed functional configuration diagram of the preprocessing unit according to an embodiment of the present invention;
4 is a detailed functional configuration diagram of the plating unit according to an embodiment of the present invention;
Figure 5 is a detailed functional configuration diagram of the post-treatment washing and drying unit according to an embodiment of the present invention;
Figure 6 is a detailed functional configuration diagram of a flat conveyor roller module according to an embodiment of the present invention;
Figure 7 is a detailed functional configuration diagram of the conveying roller part according to an embodiment of the present invention;
Figure 8 is a detailed functional configuration diagram of the rotation center control unit according to an embodiment of the present invention;
and
Figure 9 is a functional diagram of the power roller part according to an embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

In the following description, pyeongpyeon and pyeongpyeon have the same meaning and will be described selectively to suit the context.

Figure 2 is a functional configuration diagram of a roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film material according to an embodiment of the present invention, and Figure 3 is a detailed functional configuration diagram of the preprocessing unit according to an embodiment of the present invention. Figure 4 is a detailed functional configuration diagram of a plating unit according to an embodiment of the present invention, Figure 5 is a detailed functional configuration diagram of a post-treatment washing and drying unit according to an embodiment of the present invention, and Figure 6 is an embodiment of the present invention. Figure 7 is a detailed functional configuration diagram of a flat conveying roller module according to an embodiment of the present invention, Figure 7 is a detailed functional configuration diagram of the conveying roller part according to an embodiment of the present invention, and Figure 8 is a rotation diagram according to an embodiment of the present invention. This is a detailed functional configuration diagram of the center adjustment unit, and Figure 9 is a functional diagram of the power roller unit according to an embodiment of the present invention.

Hereinafter, the roll-to-roll conveyance system 900 for secondary battery copper-plated ultra-thin film material according to an embodiment of the present invention will be described in detail with reference to all the attached drawings, including a film unwinding unit 1000 and a preprocessing unit 2000. It is composed of a plating unit 3000, a post-processing washing and drying unit 4000, a film winding unit 5000, and a central control unit 6000.

In the film unwinding unit 1000, a copper (Cu) film with a thickness of 1,500 to 2,000 angstroms (Å) is deposited through a stuttering process. A PET film with an average thickness of 4 micrometers is pulled out and transported in a flat (flat) state without wrinkles in the front, rear, left and right directions by one or more flat transport roller modules (7000).

The flat conveying roller module 7000 includes a conveying roller unit 7100 and a power roller unit 7200.

The flat plate transport roller module (7000) maintains the PET film or copper plated film in a flat, flat state without wrinkles in the front, back, left, and right directions. If the PET film is supplied in a flat, flat state without wrinkles, the sputtering method has the advantage that plating deviations or defects rarely occur because the thickness of the plating is uniform. In addition, by maintaining uniform quality of the copper plating film produced, standardization of production work is easily achieved, productivity or yield is improved, and manufacturing costs are reduced, thereby increasing consumer preference.

Two or more flat conveyor roller modules (7000) are installed in each functional section, and the number installed can be arbitrarily selected or adjusted according to the need for quality improvement and maintenance.

The flat transport roller module 7000 has the advantage of eliminating defects such as wrinkles, bending, tearing, and meandering of the PET film and copper plating film, and allowing the plating layer to be formed with a uniform thickness. Warping is a phenomenon in which PET film and copper plating film bend in one direction or in different directions during transportation. The crumpled wrinkle phenomenon is a wrinkling phenomenon in which the PET film and copper-plated film are crumpled and distorted due to unbalanced hardness and adhesion, and the tearing phenomenon is a phenomenon in which the PET film and copper-plated film are torn and separated by a small force during transportation. This is a phenomenon in which PET film and copper plating film are conveyed in a sideways, deviated direction, or other direction rather than in a designated direction during the conveyance process.

The conveying roller unit 7100 is formed by engraving a groove of a predetermined depth along a spiral shape that is symmetrical in the opposite direction toward both ends at the middle part of the longitudinal direction of the cylindrical outer peripheral surface. It is a free bearing type and rotates by external force and has left and right ends. The central axis position value of each central axis is adjusted up, down, left, and right, and the hardness coefficient is in the range of 65 to 69.

The conveying roller unit 7100 includes a conveying cylindrical body portion 7110, a flat conveying groove 7120, a body rotation axis 7130, and a rotation center adjusting portion 7140.

The conveying cylindrical body portion 7110 has a cylindrical shape, has a hardness coefficient in the range of 65 to 69, and has a smooth surface.

The flat conveying groove 7120 is a spiral groove symmetrical in the opposite direction from the middle of the longitudinal direction toward both ends along the outer peripheral surface of the conveying cylindrical body portion 7110, and is formed with a depth of 0.3 to 0.5 micrometers in the middle of the longitudinal direction. It is formed to a depth of 0.5 to 0.8 micrometers at the outer end.

The body rotation axis 7130 forms the rotation center axis of the conveying cylindrical body portion 7110 and protrudes from both ends.

The rotation center control unit 7140 fixes the body rotation axis 7130 in a rotating state and moves the rotation axis up, down, left, and right within a range of 0.3 to 0.8 micrometers from the rotation center by an external manipulation signal.

The rotation center control unit 7140 includes a ball bearing unit 7141, a bearing fixing unit 7142, a moving bracket 7143, a fixed bracket 7144, a left movement control unit 7145, a right movement control unit 7146, and an upper It includes a movement control unit 7147 and a lower movement control unit 7148.

The ball bearing unit 7141 is fixedly installed so that the body rotation axis 7130 is rotated.

In the bearing fixing part 7142, the ball bearing part 7141 is fixedly installed at the central position.

The movable bracket 7143 has a bearing fixing part 7142 fixed to the central position and moves up, down, left and right by external operation signals.

The fixing bracket 7144 is fixedly installed on the corresponding wall of the secondary battery copper-plated ultra-thin film material roll-to-roll conveyance system.

The left movement control unit 7145 is fixedly installed at the left position of the fixing bracket 7144 and supports the movement bracket 7143 by pushing it to the right by an external operation signal.

The right movement control unit 7146 is fixedly installed at the right position of the fixing bracket 7144 and supports the movement bracket 7143 by pushing it to the left by an external operation signal.

The upper movement control unit 7147 is fixedly installed at the upper position of the fixing bracket 7144, and pushes and supports the movable bracket 7143 in the downward direction by an external operation signal.

The lower movement control unit 7148 is fixedly installed at the lower position of the fixing bracket 7144 and supports the movement bracket 7143 by pushing it upward in response to an external operation signal.

The power roller unit 7200 is installed adjacent to one of the upper and lower parts selected from the vertical direction of the conveying roller unit 7100 at predetermined intervals, and rotates by generating rotational power in response to a corresponding control signal from the central control unit 6000. The conveying roller unit 7100 is rotated by friction with a friction coefficient of 0.3 to 0.8. Here, friction has the same meaning as adhesion or adhesion.

The power roller unit 7200 is installed at a location selected from the upper and lower sides.

The outer peripheral surface of the conveying cylindrical body portion (7110) and the power roller portion (7200) is sprayed with a friction resistance liquid to a thickness of 1 micrometer or less in order to lower the frictional resistance and improve sliding properties and to enhance waterproofness, water resistance, and corrosion resistance. Plate it.

The friction resistance solution is 3.5 parts by weight of tricalcium phosphate, 12.5 parts by weight of hydroxyproline, 3.5 parts by weight of barium carbonate, 5.5 parts by weight of bisphenol A-epichlorohydrin-methacrylic acid polymer, and benzoyl peroxide for 100 parts by weight of polycarbonate resin. It is composed by mixing 5.5 parts by weight of (BPO: Benzoyl Peroxide), 3.5 parts by weight of cyclomethicone, and 15 parts by weight of dimethyl carbonate.

At this time, polycarbonate resin is a base resin with excellent stain resistance, corrosion resistance, deformation resistance, crack resistance, fire resistance, heat resistance, and durability.

In addition, Tricalcium Phosphate is added to prevent surface contamination by preventing water stains from forming.

In addition, hydroxyproline suppresses the occurrence of surface cracks in the plating layer, prevents cracking, and strengthens corrosion resistance.

In addition, barium carbonate is added to promote cohesion to improve hardenability, to form a smooth surface, and to prevent oxidation and discoloration.

In addition, bisphenol A-epichlorohydrin-methacrylic acid polymer is a material corresponding to CAS number 36425-15-7, which enhances corrosion resistance, corrosion resistance, and anti-pollution properties. It is added for

In addition, benzoyl peroxide (BPO: Benzoyl Peroxide) is further added to improve the rigidity of the plating layer; Cyclomethicone is added to protect the surface by inhibiting oxidation and to enhance durability.

Additionally, dimethyl carbonate is added to increase wear resistance and lubricity to reduce frictional resistance.

The preprocessing unit 2000 cleans and dries the PET film that is conveyed from the film unwinding unit 1000 by spreading it in a flat, flat state without wrinkles in the front, rear, left, and right directions by one or more flat conveying roller modules 7000.

The pretreatment unit 2000 includes a pretreatment cleaning unit 2100.

The pre-treatment washing unit 2100 is a PET film supplied from the film unwinding unit 1000 by spreading it in a flat, flat state without wrinkles in the front, rear, left, and right directions, and washing it in water flowing at an average temperature of 26 degrees Celsius and a flow rate of 1.5 m per second for an average of 1 to 1.5 seconds. Clean both the upper and lower surfaces by soaking for a while.

There are two types of washing: washing using water and pickling using acid. It is relatively preferable to use the water washing method, which is selected depending on the physical characteristics of the material to be washed.

The plating unit 3000 applies a low-pressure environment of 1/1000 mmHg or less to the PET film, which is spread and conveyed from the pre-processing unit 2000 into a flat plate without wrinkles in the front, rear, left, and right directions by one or more flat conveying roller modules 7000. A copper plating film is created by repeatedly plating ionized copper. The plating part 3000 is formed by plating a copper thin film with a thickness of 1500 to 2000 angstroms (10-9 power) on one side of the PET film using a sputtering method.

Meanwhile, the thickness of the metal to be plated can be adjusted as needed.

The metal to be plated is described as copper, but it goes without saying that aluminum, gold, silver, copper, stainless steel, etc. can be plated as needed.

The plating part 3000 includes a first plating part 3100 and a second plating part 3200.

The first plating unit 3100 applies 20 to 30 layers of ionized copper in a low-pressure environment of 1/1000 mmHg or less to one side of the PET film supplied from the pre-processing unit 2000 in a flat, flat form without wrinkles in the front, rear, left, and right directions. Create a single-sided plating film by performing primary plating for one second.

The second plating unit 3200 applies ionized copper in a low-pressure environment of 1/1000 mmHg or less to the other side of the single-sided plating film, which is supplied in a flat, flat form without wrinkles in the front, rear, left and right directions from the first plating unit 3100. Secondary plating is performed for 20 to 30 seconds to produce a copper plating film with both sides plated.

The post-processing washing and drying unit 4000 cleans and dries the copper plating film that is conveyed from the plating unit 3000 by spreading it in a flat, flat state without wrinkles in the front, rear, left, and right directions by one or more flat transfer roller modules 7000. . The post-treatment washing and drying unit 4000 may have a similar configuration and function as the pre-processing unit 2000.

The post-treatment washing and drying unit 4000 includes a post-treatment washing unit 4100 and a post-treatment drying unit 4200.

The post-processing cleaning unit 4100 washes the copper plating film, which is supplied from the plating unit 3000 by spreading it in a flat, flat form without wrinkles in the front, rear, left, and right directions, in water flowing at an average temperature of 26 degrees Celsius and a flow rate of 1.5 m per second, with an average of 1 to 1.5 m. Clean both the top and bottom surfaces by soaking for seconds.

The post-processing drying unit 4200 dries the copper plating film supplied from the post-processing washing unit 4100 in a flat, flat form without wrinkles in the front, rear, left and right directions by allowing it to stay in an environment of 80°C to 100°C for 10 to 15 seconds.

The film winding unit 5000 transports the copper-plated film, which is spread out and conveyed in a flat, flat state without wrinkles, in the forward, left, and right directions by one or more flat conveying roller modules 7000 from the post-processing washing and drying unit 4000 in the forward, left, and right directions. Unfold and roll it into a flat, flat form without wrinkles.

The central control unit 6000 connects to each functional unit provided in the secondary battery copper-plated ultra-thin film material roll-to-roll transport system, outputs the corresponding control signals, and monitors the operating status.

The process of cleanly removing foreign substances, scale, oil, etc. attached to the surface of a specific object is called a cleaning process, and the cleaning process using water is called washing or water cleaning or water cleaning or water washing, and cleaning using acid is called water cleaning. The process is called acid cleaning or pickling or pickling.

Each cleaning consists of spraying or immersing the cleaning solution at a high pressure of about 250 bar, and then requires a drying process.

There are many different types of acids, such as sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, and phosphoric acid. The acid solution used for pickling is selectively used depending on the type of object to be cleaned. It is quite natural that different concentrations are selected and used.

For example, when using phosphoric acid, it is diluted in water to a selected concentration of 10 to 50 percent (%) and used for cleaning in an environment with an ambient temperature of 70 degrees Celsius. Hydrochloric acid is used by diluting 50% by volume in water, and sulfuric acid is used by diluting 10% in water in an environment with an ambient temperature of 60 degrees Celsius.

Among the anode materials, cathode materials, separator, electrolyte, and exterior materials that make up a secondary battery, the anode material plays a central role in determining performance such as the charging capacity and voltage of the battery, and there is a big difference depending on what elements are included in the anode material. These elements include nickel (Ni), cobalt (Co), manganese (Mn), aluminum (Al), and copper (Cu).

Nickel as an anode material has a high energy density, which has the advantage of extending the driving distance when used in vehicles. If it contains more than 60% nickel, it is called high nickel. Recently, more than 80% has been used, and a specific domestic company has developed ultra-high nickel containing more than 90%, and has further succeeded in commercializing high nickel secondary batteries containing more than 95%. . However, as the content of nickel increases, technology for mixing it with other elements is required to eliminate the increased risk of explosion.

Cobalt as a cathode material is a key element that prevents corrosion of the cathode material and increases the stability of secondary batteries, but it is the most expensive element, and many elements are being tested to lower the proportion of cobalt contained while ensuring the safety of secondary batteries. It is known that the amount of cobalt added can be reduced to 5% or less.

Manganese as an anode material is known to play a big role in ensuring the stability of batteries, and aluminum can increase the output of secondary batteries, but it is highly reactive and can make it unstable, so it requires high manufacturing technology, but expensive cobalt is used to some extent. It has the advantage of increasing output while replacing it. Meanwhile, copper (Cu) or copper may be used as the anode material.

Secondary batteries are generally named according to the material mainly used for the cathode material, for example, lithium battery.

One of the technical ideas pursued by the present invention is to provide a device for transporting a PET film (copper-plated ultra-thin film) whose surface is thinly plated with copper as a cathode material used in secondary batteries.

The configuration of the present invention is that a PET film in the form of a thin film is supplied in a flat flat form without wrinkles in the front, back, left, and right directions, and the copper thin film is plated with a uniform thickness, so that copper-plated ultra-thin film material is produced without defects and with high productivity or yield. The copper-plated ultra-thin film material, on which the copper thin film plating has been completed, is rolled out in a flat, flat form without any wrinkles or wrinkles in the front, rear, left, and right directions to prevent defects from occurring during the winding process, thereby lowering the production cost through high yield and producing secondary batteries. It has the advantage of expanding distribution.

Although the present invention has been described in detail with respect to the disclosed embodiments above, it is clear to those skilled in the art that various changes and modifications are possible within the technical scope of the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

900: Secondary battery copper-plated ultra-thin film material roll-to-roll conveyance system
1000: Film unwinding unit 2000: Preprocessing unit
3000: Plating section 3100: First plating section
3200: Second plating section 4000: Post-treatment washing and drying section
5000: Film winding unit 6000: Central control unit
7000: Flat transfer roller module 7100: Transfer roller unit
7110: Conveyance cylindrical body 7120: Flat conveyance groove
7130: Body rotation axis 7140: Rotation center control unit
7141: Ball bearing part 7142: Bearing fixing part
7143: Moving bracket 7144: Fixed bracket
7145: Left movement control unit 7146: Right movement control unit
7147: Upper movement control unit 7148: Lower movement control unit
7200: Power roller unit

Claims (5)

delete delete A film unwinding unit (1000) that unfolds and conveys a PET film with an average thickness of 4 micrometers into a flat plate without wrinkles in the front, rear, left and right directions by one or more flat conveying roller modules (7000) and conveys it;
A pre-processing unit 2000 that cleans the PET film, which is spread and conveyed from the film unwinding unit 1000 into a flat plate without wrinkles in the front, rear, left and right directions by one or more flat conveying roller modules 7000;
Copper ionized in a low-pressure environment of 1/1000 mmHg or less is placed on the PET film, which is spread and conveyed from the pre-processing unit 2000 into a flat plate without wrinkles in the front, rear, left, and right directions by one or more flat conveying roller modules 7000. A plating unit 3000 that generates a copper plating film by repeatedly plating using a sputtering method;
The copper plating film, which is spread and returned from the plating unit 3000 in a flat flat state without wrinkles in the front, rear, left and right directions by one or more flat transfer roller modules 7000, is washed, treated for rust prevention, and dried with moisture and hot air. Post-treatment washing and drying unit (4000);
The copper plated film, which is spread and conveyed from the post-processing washing and drying unit 4000 into a flat plate without wrinkles in the front, left, and right directions by one or more flat conveying roller modules 7000, is flat without any wrinkles in the front, left, and right directions. A film winding unit (5000) that unfolds and winds in a flat state; Including,
A central control unit (6000) that connects to each functional unit provided above, outputs respective control signals, and monitors the operating status; In the secondary battery copper-plated ultra-thin film material roll-to-roll transport system further comprising,
The flat transport roller module (7000) is
A groove of a certain depth is formed by engraving a groove of a certain depth along a spiral shape that is symmetrical in the opposite direction from the middle of the longitudinal surface of the cylindrical outer peripheral surface toward both ends. It is a free bearing type and rotates by external force, and each central axis at the left and right ends moves up, down, left, and right. A conveying roller unit (7100) whose central axis position value is adjusted and whose hardness coefficient is in the range of 65 to 69;
The conveying roller unit 7100 is installed adjacent to a selected one of the upper and lower parts in the vertical direction of the conveying roller unit 7100 at a predetermined interval, and rotates by generating rotational power according to a corresponding control signal from the central control unit 6000. ) a power roller unit (7200) that rotates by friction with a friction coefficient of 0.3 to 0.8; A roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film materials. According to claim 3,
The conveying roller unit 7100 is
A conveying cylindrical body portion (7110) that has a cylindrical shape, has a hardness coefficient in the range of 65 to 69, and has a smooth surface;
Along the outer peripheral surface of the conveying cylindrical body portion 7110, a spiral groove symmetrical in the opposite direction from the middle portion in the longitudinal direction toward both ends is 0.3 to 0.5 micrometer deep in the middle portion in the longitudinal direction and at both outer ends in the longitudinal direction. A flat plate conveying groove (7120) formed to a depth of 0.5 to 0.8 micrometers;
A body rotation axis (7130) that forms the rotation center axis of the conveying cylindrical body portion (7110) and protrudes from both ends, respectively;
A rotation center control unit 7140 that fixes the body rotation axis 7130 in a rotational state and moves the rotation axis up, down, left, and right within a certain range from the center of rotation by an external manipulation signal; A roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film materials.
According to claim 4,
The rotation center control unit 7140 is
A ball bearing portion 7141 on which the body rotation axis 7130 is fixedly installed in a rotating state;
A bearing fixing part 7142 in which the ball bearing part 7141 is fixedly installed at a central position;
A movable bracket (7143) on which the bearing fixing part (7142) is fixedly installed at a central position and moves up, down, left and right in response to an external manipulation signal;
A fixing bracket (7144) fixed to a corresponding wall of the secondary battery copper-plated ultra-thin film material roll-to-roll transport system;
A left movement control unit 7145 is fixedly installed at the left position of the fixing bracket 7144 and pushes and supports the movable bracket 7143 to the right by an external operation signal;
A right movement control unit (7146) is fixedly installed at the right position of the fixing bracket (7144) and supports the movement bracket (7143) by pushing it to the left in response to an external operation signal;
An upper movement control unit 7147 that is fixedly installed at an upper position of the fixing bracket 7144 and pushes and supports the movable bracket 7143 in a downward direction by an external manipulation signal;
A lower movement control unit 7148 that is fixedly installed at a lower position of the fixing bracket 7144 and supports the movable bracket 7143 by pushing it upward in response to an external manipulation signal; A roll-to-roll conveyance system for secondary battery copper-plated ultra-thin film materials.