KR102607185B1 - Yarn manufacturing system by recycling secondary battery separator and method using the same - Google Patents

Abstract

The present invention is a yarn manufacturing system using a ceramic coated separator (CCS), which includes a CCS supply module 110 that supplies a ceramic coated separator loaded in a preset manner in the form of a sheet; A guide roller 120 that guides the ceramic coating separator provided from the CCS supply module 110 in a preset direction; A slitting module 130 for slitting the ceramic coating separator transported through the guide roller 120 in a preset manner, and slitting in a direction parallel to the transport direction of the ceramic coating separator, parallel to the transport direction. A slitting module ( 130); and a winding module 140 that winds the cut yarn onto a previously prepared cone unit 141; Provides a yarn manufacturing system including.

Description

Yarn manufacturing system by recycling secondary battery separator and method using the same}

The present invention relates to a yarn manufacturing system and method for manufacturing the same by recycling CCS separators among secondary battery separators.

The demand for lithium secondary batteries (hereinafter referred to as 'secondary batteries') is rapidly increasing as a power source for not only mobile electronic devices but also various e-mobility based on high energy density, discharge voltage, and output stability. , a secondary battery consists of a positive electrode material, a negative electrode material, an electrolyte, and a separator that separates the positive electrode material from the negative electrode material.

The separator is a thin membrane in the form of a film or sheet made of an insulating material and has a thickness of about 5 to 15㎛. The separator is a micro-porous structure containing many fine pores that blocks physical contact between the anode and cathode materials and acts as a passage for lithium ions to move between the two electrodes. consist of.

This type of separator has a structure similar to Gore-Tex, a functional material, so it can implement moisture-permeable and waterproof functions and can be used as a functional material.

During the production process for secondary batteries, separators are treated as defective due to defects such as micro-scratches, or are discarded due to overproduction. As such, the amount of separators in the form of waste is gradually increasing with the explosive growth of secondary batteries. This is the situation.

Nevertheless, the separation membrane cannot be recycled and is simply incinerated or shredded, causing resource waste and environmental pollution problems.

In order to solve this problem, the present applicant disclosed Republic of Korea Patent No. 10-2406934 (functional fabric using recycled separators for secondary batteries and manufacturing method thereof).

The technology includes (a) preparing a separator sheet with a microporous structure that was discarded due to defective processing or overproduction during the production process for manufacturing secondary batteries, (b) preparing the separator sheet and a fabric for covering the separator sheet. Supplying each sheet so that an adhesive sheet is interposed between the sheets, (c) laminating the separator sheet and the fabric sheet to adhere by melting the adhesive sheet, and in step (b), each sheet is Supplied to maintain tension, the separator sheet, adhesive sheet, and fabric sheet are all supplied at the same speed, and the laminated structure in which the separator sheet, adhesive sheet, and fabric sheet are laminated in the order of step (c) is maintained at a predetermined temperature atmosphere. Discloses a method of manufacturing upcycled functional fabric by pressing and laminating.

However, the above-described technology is applicable to LiBS (Litium Battery Separator), a waste separator for secondary batteries, and does not apply to CCS (Ceramic Coated Separator), another type of waste separator.

In the case of CCS film, not only is it completely discarded as it cannot be recycled due to the influence of the ceramic components contained within, but even down cycling has not been attempted, so the need for technology to recycle it is increasing. , if recycling of CCS film is possible, it is expected to make a significant contribution to separator waste disposal.

(Patent Document 1) Korean Patent No. 10-2406934

One aspect of the present invention aims to recycle ceramic-coated ceramic-coated separators into yarn, and provides a yarn manufacturing system most suitable for the characteristics of the ceramic-coated separator.

A yarn manufacturing system using a ceramic coated separator (CCS) according to an embodiment of the present invention includes a CCS supply module 110 that supplies a ceramic coated separator loaded in a preset manner in the form of a sheet; A guide roller 120 that guides the ceramic coating separator provided from the CCS supply module 110 in a preset direction; A slitting module 130 that slits the ceramic coating separator transported through the guide roller 120 in a preset manner, and extends parallel to the transport direction so as to slit in a direction parallel to the transport direction of the ceramic coating separator. The slitting module 130 is provided with at least two blade units 131 along the width direction of the ceramic coating separator, and is processed into yarn in a cut state with a width corresponding to the spacing of the blade units 131. ); and a winding module 140 that winds the cut yarn onto a previously prepared cone unit 141.

According to an embodiment of the present invention, the slitting module 130 generates a plurality of cut yarns formed by the plurality of blade units 131, and the winding module 140 produces the plurality of cutting yarns. It may include the cone units 141 corresponding to the number of yarns in the cut state so that the yarns in each state are independently wound on the cone units 141.

According to one embodiment of the present invention, the slitting module 130 includes a tension roller 132 that transfers while controlling the tension of the ceramic coating separator passing through the slitting module 130, and the tension roller (132) can maintain a preset minimum tension or more in the transfer direction of the ceramic coating separator so that the ceramic coating separator is cut by the blade unit 131.

According to one embodiment of the present invention, the slitting module 130 removes the ceramic coating material remaining on the surface of the blade unit 131 when the ceramic coating separator is cut by the blade unit 131. It is provided with a suction part 133 that forcibly suctions and removes the material, and the tension roller 132 and the suction part 133 operate alternately with each other, so that slitting and removal of the ceramic coating material can be performed alternately.

According to an embodiment of the present invention, a composite processing module 150 performs preset processing by unwinding the cut yarn by rewinding the cut yarn wound around the cone unit 141; It may further include.

According to an embodiment of the present invention, the composite processing module 150 performs twisting or covering using polyester on the cut yarn, thereby creating a composite composite. It can form yarn in a processed state.

According to one embodiment of the present invention, the CCS supply module 110 supplies the ceramic coating separator in the form of a sheet by connecting it in series, and the rear end of the nth ceramic coating separator and the front end of the n+1th ceramic coating separator. The parts can be laminated in a predetermined manner.

According to an embodiment of the present invention, the portion where the rear end of the nth ceramic coating separator and the front end of the n+1th ceramic coating separator are laminated are below the critical thickness set in consideration of the height of the blade unit 131. can be formed.

According to an embodiment of the present invention, the blade units 131 arranged to be spaced apart along the width direction of the ceramic coating separator are formed to adjust their mutual spacing, and according to the mutual spacing, the yarn in the cut state is Width can be adjusted.

Meanwhile, the present invention provides a yarn manufacturing method using the above-described yarn manufacturing system, including (a) supplying a ceramic coating separator loaded in a preset manner from the CCS supply module 110 (S110); (b) a step (S120) in which the ceramic coating separator provided from the CCS supply module 110 is guided and transferred to the slitting module 130 by the guide roller 120; (c) A step of slitting the ceramic coating separator through the slitting module 130, wherein the blade unit ( Step (S130) of generating cut yarn with a width corresponding to the interval of 131); and (d) a step (S140) of winding the cut yarn around the cone unit 141 through the winding module 140.

According to an embodiment of the present invention, after step (d), (e) the yarn in the cut state wound around the cone unit 141 is reverse wound by the composite processing module 150, thereby forming the cutting. A step of unwinding the yarn in a preset state and performing preset processing, wherein the yarn in the cut state is formed into a yarn in a composite processed state by performing twisting or covering using polyester (S150) may further include.

Another embodiment of the present invention may include yarn manufactured according to the yarn manufacturing method described above.

First, the present invention can provide environmentally friendly yarn by recycling the ceramic-coated ceramic coating separator into yarn, and has the effect of reducing enormous costs in the process of separately disposing of the yarn.

Second, the present invention has the effect of providing yarn for producing various recycled products that require lightness by utilizing the lightness, which is a characteristic of the ceramic coating separator.

Third, the present invention can maximize yarn production efficiency by effectively slitting the ceramic coating separator and simultaneously winding each of the slitted yarns.

Figure 1 is a conceptual diagram schematically showing the entire process of a yarn manufacturing system according to an embodiment of the present invention.
Figure 2 schematically shows the process of forming yarn in a cut state through the slitting module of the yarn manufacturing system according to an embodiment of the present invention.
Figure 3 is a schematic diagram of the slitting module of the yarn manufacturing system according to an embodiment of the present invention.
Figure 4 is a schematic diagram schematically showing the connected form of the ceramic coating separator applied to the yarn manufacturing system according to an embodiment of the present invention.
Figure 5 (a) is a photograph showing a state in which yarn in a cut state is wound by the slitting module of the yarn manufacturing system according to an embodiment of the present invention, and (b) is a photograph showing a state in which yarn in a cut state is wound by the composite processing module 150. This is a photo showing the state in which the yarn in the complex processing state is wound.
Figure 6 is a photograph showing the actual process of Figure 2.
Figure 7 is a schematic photographic diagram showing the entire process of the yarn manufacturing system according to an embodiment of the present invention.
Figure 8 is a flowchart of a method using a yarn manufacturing system according to an embodiment of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected," but also the case where it is "electrically connected" with another element in between. . Additionally, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

In this specification, 'part' includes a unit realized by hardware, a unit realized by software, and a unit realized using both.

Additionally, one unit may be realized using two or more pieces of hardware, and two or more units may be realized using one piece of hardware. Meanwhile, '~unit' and '~module' are not limited to software or hardware, and '~unit' and '~module' may be configured to be in an addressable storage medium, and may be configured to be located on one or more processors. It may also be configured to reproduce them. Terms such as '~unit' and '~module' described herein refer to a unit that processes at least one function or operation, which may be implemented as hardware, software, or a combination of hardware and software, and is physically separated. Please specify in advance that this does not mean anything.

Therefore, as an example, '~part' and '~module' refer to components such as software components, object-oriented software components, class components, and task components, processes, functions, and properties. Contains fields, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within components and '~parts' and '~modules' may be combined into smaller numbers of components and '~parts' and '~modules' or may be combined with additional components and '~parts' and '~modules'. It can be further separated into ‘~modules’. In addition, components and '~parts' and '~modules' may be implemented to regenerate one or more CPUs within the device.

Hereinafter, a yarn manufacturing system according to the present invention will be described with reference to the drawings.

Referring to Figure 1, the yarn manufacturing system according to the present invention consists of a CCS supply module 110, a guide roller 120, a slitting module 130, a winding module 140, and a composite processing module 150.

The CCS supply module 110 is configured to supply the ceramic coating separator 10 loaded in a preset manner in the form of a sheet. The ceramic coating separator 10 is a separator that was overproduced and discarded during the production process for secondary battery manufacturing, or a separator of a quality that cannot be used for secondary batteries (a quality that is judged to be poor quality due to fine scratches, scratches, etc., or is of poor marketability). It can be included.

Here, the ceramic coating separator 10 refers to a separator composed of a microporous structure that is difficult to implement the function of a secondary battery, but is sufficient to implement moisture permeable and waterproof functionality, and the size and arrangement of a plurality of pores formed in the separator. Includes both uniform and non-uniform conditions.

The ceramic coating separator 10 is in the form of a thin film and may be made of a polyethylene-based polymer film with a microporous structure containing multiple pores.

Since the ceramic coating separator 10 is not in the form of a sheet with a relatively long width, it is somewhat difficult to combine with fabric. Preferably, it can be configured to manufacture yarn (thread) using a ceramic coating separator 10 that is less than 15 cm in width. Currently, the ceramic coating separator 10 is coated with ceramic, and it is difficult to melt it, so the entire amount is disposed of, and a huge cost is incurred in the process. Accordingly, it can be recycled by processing it into yarn using the yarn manufacturing system according to the present invention.

The main component of the ceramic coating separator 10 applied in the present invention is polyethylene. This has the great advantage of being lightweight. The specific gravity of polyethylene is 0.94, so it weighs about 66% of polyester.

Due to these characteristics, when the yarn using the yarn manufacturing system according to the present invention is applied to a recycled product, it has a great effect in terms of lightness. In addition, since it is hydrophobic, it has stain resistance and chemical resistance, has low thermal conductivity, high heat retention, and has very high heat resistance due to the ceramic component in the coated state.

As described above, the CCS supply module 110 specifies in advance that any method can be applied as long as it can transport or supply the ceramic coating separator 10 in the form of a sheet.

The guide roller 120 is configured to guide the ceramic coating separator 10 provided from the CCS supply module 110 in a preset direction. It performs the function of stably transferring the sheet-shaped ceramic coating separator 10 to the slitting module 130. In Figure 1, a method of conveying using a pair of rollers is explained, but this is only an example, and all known means can be applied.

The slitting module 130 is configured to slit the ceramic coating separator 10 transported through the guide roller 120 in a preset manner. The direction of slitting can be understood as the longitudinal direction of the ceramic coating separator 10. The sheet-shaped ceramic coating separator 10 is divided into a width direction and a length direction, and is configured to be slitted by blade units 131 arranged to extend in the length direction.

This will be explained with further reference to Figures 2 and 3. 2 and 3 are plan views showing the arrangement of the ceramic coating separator 10 and the blade unit 131. The direction of slitting is configured to be the same as the transfer direction of the ceramic coating separator 10. The blade units 131 are arranged at predetermined intervals (d1, d2) along the width direction, and the tension of the ceramic coating separator 10 is adjusted by the tension roller 132, so that the ceramic coating separator 10 is It can be processed into yarn in a cut state composed of multiple pieces. In a state in which a predetermined tension is applied to the sheet-shaped ceramic coating separator 10 by the tension roller 132, a downward force is applied to contact the blade unit 131, thereby causing slitting (Figure 6).

The tension roller 132 maintains a preset minimum tension or more in the transfer direction of the ceramic coating separator 10 so that the ceramic coating separator 10 is cut by the blade unit 131. However, as shown in FIG. 4, when the nth and n+1th ceramic coating separators (10_n, 10_n+1) are supplied in a connected state, they may be separated if the tension is maintained too high. It is necessary to maintain tension. That is, when contacting the blade 131a at the center of the blade unit 131, the pressure must be higher than the pressure for cutting the ceramic coating separator 10, and the nth and n+1 ceramic coating separators 10_n, 10_n +1) Tension is required to prevent separation.

In this application, for conceptual distinction, the form of the primarily slitted ceramic coating separator 10 is defined as 'yarn in a cut state'. The width of the yarn in the cut state may depend on the spacing distance of the blade units 131, and the spacing of the plurality of blade units 131 formed on the slitting body 131b is configured to be adjustable according to the user's selection. It is desirable. As an example, the spacing of the blade units 131 may be configured in steps of 2 to 5 mm. This is to manage denier according to cutting standards.

Meanwhile, the spacing between the plurality of blade units 131 formed on the slitting body 131b can be formed differently from each other, so that yarn in a cut state with various widths can be obtained through a single process.

The slitting module 130 generates a plurality of cut yarns through a plurality of blade units 131, and these are each wound on separate cone units 141a, 141b, and 141c.

The winding module 140 is provided with cone units 141 corresponding to the number of cut yarns so that each of the plurality of cut yarns is independently wound on the cone unit 141. Figure 1 shows three cone units 141a, 141b, and 141c as an example, but the number may change depending on the designer's choice.

The slitting module 130 has a suction unit 133 that forcibly suctions and removes the ceramic coating material remaining on the surface of the blade unit 131 when the ceramic coating separator 10 is cut by the blade unit 131. is provided.

Here, the suction unit 133 may be configured to form a vacuum inside and collect external foreign substances. It may be configured to be periodically replaced through a separate filter means (not shown).

The tension roller 132 described above performs the function of pressurizing and transporting the yarn in a cut state, and the tension roller 132 and the suction unit 133 may be operated alternately with each other. Since slitting is performed only when the tension roller 132 is operated, by operating them alternately, slitting-suction-slitting-suction can be continuously performed repeatedly. By providing the suction portion 133, the present invention can prevent ceramic coating components from penetrating between the blade units 131 and causing malfunction.

The composite processing module 150 is configured to unwind the cut yarn and perform preset processing by rewinding the cut yarn wound around the cone unit 141. In other words, this means rewinding the cut yarn wound on the cone unit 141 again. In the process of rewinding, twisting or covering is performed using polyester to form yarn in a composite processed state.

This will be explained with reference to FIG. 5 . Figure 5 (a) shows a state in which yarn in a cutting state is wound, and (b) shows a state in which yarn in a complex processing state is wound. As shown in Figure 5, the composite processed yarn is relatively thick and can be widely used for bags or industrial purposes rather than for clothing. Referring to the enlarged view shown in (b) of FIG. 5, twisting is configured to maintain uniformity without causing snarl of the yarn.

This will be explained with reference to Figures 4 (a) and (b). (a) is an example in which the nth and n+1th ceramic coating separators (10_n, 10_n+1) form overlapping areas. In other words, rather than adding separate members, it is a structure in which the nth and n+1 ceramic coating separators (10_n, 10_n+1) are overlapped and laminated.

In order to increase the winding amount of the ceramic coating separator 10, a slitting operation can be performed by connecting the nth and n+1 ceramic coating separators (10_n, 10_n+1). If the winding amount is not large, there is a problem of having to replace the cone from time to time, so the winding amount can be increased by connecting them. The CCS supply module 110 supplies the ceramic coating separator in the form of a sheet by connecting it in series, and the rear end of the nth ceramic coating separator and the front end of the n+1th ceramic coating separator may be laminated in a preset manner.

Referring to (b) of FIG. 4, the nth and n+1th ceramic coating separators 10_m and 10_m+1 may be connected through a separate adhesive means 10_b. They can be bonded together using tape, hot melt, bond, OPP film, etc.

At this time, for the passage of the blade unit 131, the thickness of the joint portions 10_a and 10_b is very important. This is because when the critical thickness is exceeded, slitting is not performed by the blade unit 131. Accordingly, the portion where the rear end of the nth ceramic coating separator and the front end of the n+1th ceramic coating separator are laminated are preferably formed below a critical thickness set in consideration of the height of the blade unit 131.

Referring to Figure 7, the actual process of the yarn manufacturing system according to the present invention will be described.

(a) shows the ceramic coating separator 10 prepared in roll form. It is prepared in roll form, but referring to (b), it can be seen that it is supplied to the slitting module 130 in sheet form. The process of processing the yarn into a plurality of cut states by the blade unit 131 is shown in (b) and (c). Referring to (c), it can be seen that a plurality of cut yarns are each independently wound on the cone unit 141. In other words, it is necessary to provide a cone unit 141 corresponding to the number of yarns in the cut state.

Figure 8 is a flowchart of a method using a yarn manufacturing system according to an embodiment of the present invention. Redundant explanation of the foregoing content will be omitted.

The method according to the present invention includes steps S110 to S150.

Step (S110) is a step in which a ceramic coating separator loaded in a preset manner is supplied from the CCS supply module 110.

Step (S120) is a step in which the ceramic coating separator provided from the CCS supply module 110 is guided and transferred to the slitting module 130 by the guide roller 120.

Step (S130) is a step in which the ceramic coating separator is slitted through the slitting module 130, and the blade is slitted by at least two blade units 131 arranged in a direction parallel to the transfer direction of the ceramic coating separator. This is the step in which cut yarn is created with a width corresponding to the spacing of the units 131.

Step (S140) is a step (S140) in which the cut yarn is wound around the cone unit 141 through the winding module 140.

Step (S150) is a step of unwinding the cut yarn and performing preset processing by rewinding the cut yarn wound around the cone unit 141 by the composite processing module 150. , This is the step of forming yarn in a complex processed state by twisting or covering the cut yarn using polyester.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

10: Ceramic coating separator (meaning sheet form)
110: CCS supply module
120: Guide roller
130: Slitting module
140: Winding module
150: Complex processing module

Claims (10)

A yarn manufacturing system that uses Ceramic Coated Separator (CCS), a ceramic-coated polyethylene polymer film among waste separators for secondary batteries,
A CCS supply module 110 that supplies ceramic coating separators loaded in a preset manner in the form of a sheet;
A guide roller 120 that guides the ceramic coating separator provided from the CCS supply module 110 in a preset direction;
A slitting module 130 that slits the ceramic coating separator transported through the guide roller 120 in a preset manner, and extends parallel to the transport direction so as to slit in a direction parallel to the transport direction of the ceramic coating separator. The slitting module 130 is provided with at least two blade units 131 along the width direction of the ceramic coating separator, and is processed into yarn in a cut state with a width corresponding to the spacing of the blade units 131. ); and
A winding module 140 that winds the cut yarn onto a previously prepared cone unit 141; Including,
The slitting module 130 is,
It includes a tension roller 132 that transfers while controlling the tension of the ceramic coating separator passing through the slitting module 130,
The tension roller 132 is,
Maintaining a preset minimum tension or more in the transfer direction of the ceramic coating separator so that the ceramic coating separator is cut by the blade unit 131,
The slitting module 130 is,
When the ceramic coating separator is cut by the blade unit 131, it is provided with a suction part 133 that forcibly suctions and removes the ceramic coating material remaining on the surface of the blade unit 131,
The tension roller 132 and the suction unit 133 operate alternately with each other, so that slitting and removal of the ceramic coating material are performed alternately,
The CCS supply module 110,
The ceramic coating separator in the form of a sheet is supplied in series connection, the rear end of the nth ceramic coating separator and the front end of the n+1th ceramic coating separator are laminated in a preset manner, and the rear end of the nth ceramic coating separator and The portion where the front end of the n+1th ceramic coating separator is laminated is formed below a critical thickness set in consideration of the height of the blade unit 131,
Yarn manufacturing system.
According to paragraph 1,
The slitting module 130 is,
A plurality of cut yarns formed by the plurality of blade units 131 are generated,
The winding module 140 is,
Comprising the cone unit 141 corresponding to the number of yarns in the cut state so that the plurality of yarns in the cut state are each independently wound on the cone unit 141,
Yarn manufacturing system.
delete delete According to paragraph 1,
A composite processing module 150 that unwinds the cut yarn and performs preset processing by rewinding the cut yarn wound around the cone unit 141; It further includes,
The composite processing module 150,
By performing twisting or covering the cut yarn using polyester, it is formed into a composite processed yarn.
Yarn manufacturing system.
delete delete According to paragraph 1,
The blade units 131 arranged to be spaced apart along the width direction of the ceramic coating separator are,
Formed so that the mutual spacing can be adjusted,
According to the mutual spacing, the yarn width in the cut state is adjusted,
Yarn manufacturing system.
A yarn manufacturing method using the yarn manufacturing system according to any one of paragraphs 1, 2, 5, and 8,
(a) supplying a ceramic coating separator loaded in a preset manner from the CCS supply module 110 (S110);
(b) a step (S120) in which the ceramic coating separator provided from the CCS supply module 110 is guided and transferred to the slitting module 130 by a guide roller 120;
(c) A step of slitting the ceramic coating separator through the slitting module 130, wherein the blade unit ( A step (S130) of generating cut yarn with a width corresponding to the interval of 131); and
(d) a step (S140) of winding the cut yarn onto the cone unit 141 through the winding module 140; Including,
Yarn manufacturing method.
According to clause 9,
After step (d) above,
(e) a step of unwinding the cut yarn and performing preset processing by rewinding the cut yarn wound around the cone unit 141 by the composite processing module 150, Step (S150) of forming yarn in a composite processed state by twisting or covering the cut yarn using polyester; Containing more,
Yarn manufacturing method.

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