KR102663774B1 - Coating layer treatment device for dry electrode and dry electrode manufacturing system including same - Google Patents

Abstract

A coating layer processing device for a dry electrode and a dry electrode manufacturing system including the same are disclosed. A coating layer processing device for a dry electrode according to an embodiment of the present invention is a coating layer processing device for a dry electrode that forms a plurality of coating layers by cutting one coating layer formed on the surface of an electrode foil, comprising: a cutting unit for cutting the coating layer; and a removal unit that removes a portion of the coating layer cut by the cutting unit.

Description

Coating layer treatment device for dry electrode and dry electrode manufacturing system including same}

The present invention relates to a coating layer processing device for dry electrodes and a dry electrode manufacturing system including the same. More specifically, the present invention relates to a coating layer processing device for dry electrodes that processes the coating layer of an electrode foil formed by compressing a powdery electrode mixture, and the same. It relates to a dry electrode manufacturing system comprising:

Generally, secondary batteries refer to batteries that can be repeatedly charged and discharged, such as lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. Such secondary batteries can be manufactured by storing an electrode assembly including a positive electrode and a negative electrode stacked with a separator in between and an electrolyte material in a case of various shapes and sealing the case.

Electrodes such as positive electrodes and negative electrodes of secondary batteries can be classified as wet electrodes or dry electrodes depending on their manufacturing method. Wet electrodes are manufactured through the process of applying an electrode mixture in a slurry state containing a solvent to the surface of an electrode base, such as a current collector, to form a coating layer, and then drying the coating layer. On the other hand, dry electrodes are manufactured through the process of forming a coating layer by pressing a powdery electrode mixture that does not contain a solvent onto the surface of an electrode base.

Recently, the solvent contained in the electrode mixture of the wet electrode generates harmful gases during the drying process, and wrinkles, pinholes, cracks, etc. occur in the coating layer of the wet electrode after drying the solvent, so wet electrodes cannot be replaced. Research and development on dry electrode manufacturing technology is increasing.

FIG. 1 is a diagram schematically showing a conventional dry electrode manufacturing system, and FIG. 2 is a diagram showing an electrode foil with a coating layer formed by the dry electrode manufacturing system of FIG. 1.

Referring to FIG. 1, the conventional dry electrode manufacturing system forms only one coating layer (C) on one electrode foil (F) through one continuous rolling process (A) (see FIG. 2), so that a plurality of dry electrodes are formed. Since the process must be repeated during manufacturing, manufacturing time and cost increase and manufacturing efficiency decreases.

The technical problem to be solved by the present invention is to provide a coating layer processing device for a dry electrode capable of manufacturing a plurality of dry electrodes through a single continuous rolling process and a dry electrode manufacturing system including the same.

In addition, the present invention provides a coating layer processing device for a dry electrode that can reduce the manufacturing time and cost required to manufacture a plurality of dry electrodes and improve manufacturing efficiency, and a dry electrode manufacturing system including the same.

According to one aspect of the present invention, a coating layer processing device for a dry electrode that forms a plurality of coating layers by cutting one coating layer formed on the surface of an electrode foil, comprising: a plurality of cutting units for cutting the coating layers; and a removal unit that removes a portion of the coating layer cut by the cutting unit. A coating layer processing device for a dry electrode may be provided.

In one embodiment, the coating layer includes: a residual coating layer remaining on the surface of the electrode foil after being cut by the cutting unit; And it may include a coating layer to be removed that is cut by the cutting unit and then removed by the removal unit.

In one embodiment, the cutting unit may include at least one of a laser and a blade.

In one embodiment, the plurality of cutting units may be arranged to be spaced apart from each other.

In one embodiment, the cutting unit includes: a first cutting unit cutting one side of the coating layer; And it may include a second cutting unit spaced apart from the first cutting unit and cutting the other side of the coating layer.

In one embodiment, after cutting the coating layer by the cutting unit, the remaining coating layer is located on the outside of the first cutting unit and the outside of the second cutting unit, respectively, and the first cutting unit and the second cutting unit A coating layer to be removed may be located between them.

In one embodiment, the cutting unit includes: a first cutting unit cutting one side of the coating layer; a second cutting unit spaced apart from the first cutting unit to cut the other side of the coating layer; a third cutting unit disposed between the first cutting unit and the second cutting unit, and disposed closer to the first cutting unit than the second cutting unit; And it is disposed between the first cutting unit and the second cutting unit, and may include a fourth cutting unit disposed closer to the second cutting unit than the first cutting unit.

In one embodiment, the cutting unit is coupled to a coupling axis and may be configured to move along the coupling axis to adjust the cutting width of the coating layer.

In one embodiment, the removal unit may include a scraping member that scrapes the coating layer to be removed.

In one embodiment, the scraping member contacts the coating layer to be removed at an angle, and the inclined inclination of the scraping member may be configured to be adjustable.

In one embodiment, the removal unit may further include a suction member that suctions the coating layer to be removed scraped by the scraping member.

In one embodiment, in order to reuse the coating layer to be removed removed from the removal unit, it may further include a receiving unit for accommodating the coating layer to be removed.

Meanwhile, according to another aspect of the present invention, a dry electrode manufacturing system including the above-described coating layer processing device for dry electrode can be provided.

In one embodiment, a dividing device may be included to cut and divide the electrode foil between the plurality of coating layers.

In one embodiment, it may include a plurality of rewinders that independently wind each of the plurality of electrode foils divided by the dividing device.

According to the present invention, it is possible to manufacture a plurality of dry electrodes through a single continuous rolling process.

In addition, there is an effect of reducing the manufacturing time and cost required to manufacture a plurality of dry electrodes and improving manufacturing efficiency.

Furthermore, those skilled in the art to which the present invention pertains will be able to clearly understand from the following description that various embodiments according to the present invention can solve various technical problems not mentioned above.

Figure 1 is a diagram schematically showing a conventional dry electrode manufacturing system.
FIG. 2 is a diagram illustrating an electrode foil with a coating layer formed by the dry electrode manufacturing system of FIG. 1.
Figure 3 is a coating layer processing device for a dry electrode according to an embodiment of the present invention.
FIG. 4 is a view viewed along part X in FIG. 3.
Figure 5 is a view showing the coating layer of the electrode foil being cut by the dry electrode coating layer processing apparatus according to an embodiment of the present invention, and the coating layer to be removed remains on the electrode foil.
FIG. 6 is a view showing the coating layer to be removed in FIG. 5 being removed from the electrode foil.
Figure 7 is a diagram according to another embodiment of Figure 5.
FIG. 8 is a diagram according to another embodiment of FIG. 5.
Figure 9 is a diagram schematically showing a dry electrode manufacturing system according to an embodiment of the present invention.
Figure 10 is a diagram showing a dividing device and a plurality of rewinders in a dry electrode manufacturing system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be construed as limited to their common or dictionary meanings, and the inventor may appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is. Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, various alternatives may be used to replace them. It should be understood that equivalents and variations may exist.

In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect the actual size. If it is determined that specific descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, such descriptions will be omitted.

The term 'coupling' or 'connection' used in this specification refers not only to the case where one member and another member are directly coupled or directly connected, but also when one member is indirectly coupled to another member through a joint member, or indirectly connected to another member. Also includes cases where it is connected to .

Figure 3 is a coating layer processing device for a dry electrode according to an embodiment of the present invention, Figure 4 is a view along part X in Figure 3, and Figure 5 is a coating layer processing device for a dry electrode according to an embodiment of the present invention. This is a view showing the coating layer of the electrode foil being cut by , and the coating layer to be removed remains on the electrode foil, and FIG. 6 is a view showing the coating layer to be removed in FIG. 5 being removed from the electrode foil. Here, FIG. 3 is an enlarged view of portion Y of FIG. 9.

In this specification, the dry electrode powder 40 (see FIG. 9) is in a powder state that does not contain a solvent, and may include electrode active materials (positive and negative electrode active materials), binders, conductive materials, fillers, etc. Hereinafter, even when simply referred to as powder 40, it should be understood to mean powder 40 for a dry electrode.

The positive electrode active material is lithium transition metal oxide; lithium metal iron phosphate; lithium nickel-manganese-cobalt oxide; An oxide in which lithium nickel-manganese-cobalt oxide is partially replaced with another transition metal; Or, it may include two or more of these, but is not limited thereto. For example, the positive electrode active material may be a layered compound such as lithium cobalt oxide (LiCoO2) or lithium nickel oxide (LiNiO2) or a compound substituted with one or more transition metals; Lithium manganese oxide with the formula Li1+xMn2-xO4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, LiMnO2, etc.; lithium copper oxide (Li2CuO2); Vanadium oxides such as LiV3O8, LiV3O4, V2O5, Cu2V2O7; Ni site type lithium nickel oxide represented by the formula LiNi1-xMxO2 (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); Expressed by the formula LiMn2-xMxO2 (where M = Co, Ni, Fe, Cr, Zn or Ta and x = 0.01 to 0.1) or Li2Mn3MO8 (where M = Fe, Co, Ni, Cu or Zn) lithium manganese complex oxide; lithium metal phosphate LiMPO4, where M is M = Fe, CO, Ni, or Mn; Lithium nickel-manganese-cobalt oxide Li1+x(NiaCobMnc)1-xO2(x = 0 to 0.03, a = 0.3 to 0.95, b = 0.01 to 0.35, c = 0.01 to 0.5, a+b+c=1); Lithium nickel-manganese-cobalt oxide partially substituted with aluminum Lia[NibCocMndAle]1-fM1fO2 (M1 is Zr, B, W, Mg, Ce, Hf, Ta, La, Ti, Sr, Ba, F, P and S, 0.8≤a≤1.2, 0.5≤b≤0.99, 0<c<0.5, 0<d<0.5, 0.01≤e≤0.1, 0≤f≤0.1); Lithium nickel-manganese-cobalt oxide partially substituted with another transition metal oxide Li1+x(NiaCobMncMd)1-xO2(x = 0 ~ 0.03, a = 0.3 ~ 0.95, b = 0.01 ~ 0.35, c = 0.01 ~ 0.5 , d = 0.001 ~ 0.03, a+b+c+d=1, M is any one selected from the group consisting of Fe, V, Cr, Ti, W, Ta, Mg and Mo), disulfide compound; Fe2(MoO4)3 and the like may be mentioned, but are not limited to these alone.

And, the negative electrode active material includes, for example, carbon such as non-graphitized carbon and graphitic carbon; LixFe2O3(0≤x≤1), LixWO2(0≤x≤1), SnxMe1-xMe'yOz (Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, group 1 of the periodic table, Metal complex oxides such as group 2 and 3 elements, halogen; 0≤y≤3; 1≤z≤8); lithium metal; lithium alloy; silicon-based alloy; tin-based alloy; Silicon-based oxides such as SiO, SiO/C, and SiO2; metal oxides such as SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4 and Bi2O5; Conductive polymers such as polyacetylene; Li-Co-Ni based materials; Or, it may include two or more of these, but is not limited thereto.

Additionally, the binder polymer included in the powder 40 may include polytetrafluoroethylene (PTFE), polyolefin, or a mixture thereof. For example, the binder polymer may contain 60% by weight or more of PTFE based on the total weight. At this time, the binder polymer may additionally include one or more of polyethylene oxide (PEO), polyvinylidene fluoride (PVdF), polyvinylidene fluoride-cohexafluoropropylene (PVdF-HFP), and polyolefin-based polymer.

Additionally, the conductive material that can be included in the powder 40 may include a conductive material without causing chemical changes in the secondary battery. For example, the conductive material may include graphite such as natural graphite or artificial graphite; Carbon black such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as fluorinated carbon, aluminum, and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives; Or it may include two or more of these. The conductive material may include one or more selected from the group consisting of activated carbon, graphite, carbon black, and carbon nanotubes for uniform mixing and improvement of conductivity. Meanwhile, considering the manufacturing process of the electrode mixture for dry electrodes, it is difficult to achieve high dispersion of linear conductive materials such as carbon fiber, so they may be minimally included or not included in the powder 40.

In addition, the filler that can be included in the powder 40 is a component that suppresses the expansion of the electrode and may include a fibrous material that does not cause chemical changes in the secondary battery. For example, the filler may be an olipine polymer such as polyethylene or polypropylene; Fibrous materials such as glass fiber and carbon fiber; Or it may include two or more of these.

Additionally, the electrode foil 500 may be made of a material with high conductivity without causing chemical changes in the secondary battery. For example, the electrode foil 500 may be made of stainless steel, aluminum, nickel, titanium, calcined carbon, copper, or a surface of aluminum or stainless steel coated with carbon, nickel, titanium, silver, etc. Additionally, the electrode foil 500 may have fine irregularities on its surface to increase the adhesion of the electrode film, which will be described later. In one embodiment, the surface of the electrode foil 500 may be entirely or partially coated with a conductive primer in order to lower the surface resistance of the electrode foil 500 and improve adhesion.

3 and 4, the dry electrode coating layer processing apparatus 10 according to an embodiment of the present invention cuts one coating layer 600 formed on the surface of the electrode foil 500 to form a plurality of coating layers ( 600) and includes a cutting unit 100 and a removal unit 200.

Typically, the powder is compressed while passing through a rolling roller and coated on an electrode foil to form a coating layer. In the case of a conventional dry electrode manufacturing system, when one continuous rolling process is performed, only one electrode foil (F, see Figure 2) with one coating layer (C, see Figure 2) is produced, so there is a limit to improving the dry electrode production rate. .

However, the coating layer processing apparatus 10 for a dry electrode according to an embodiment of the present invention forms a plurality of coating layers 600 by cutting one coating layer 600 formed on the surface of the electrode foil 500, thereby forming a dry electrode. Electrode production rate can be improved.

3 to 5, the cutting unit 100 cuts the coating layer 600 formed on the electrode foil 500. A plurality of cutting units 100 are provided, and the plurality of cutting units 100 are arranged to be spaced apart from each other. The cutting unit 100 may include various configurations capable of cutting the coating layer 600. For example, the cutting unit 100 may include at least one of a laser and a blade, but is not limited thereto.

And, as shown in FIG. 5, a plurality of cutting units 100 cut the coating layer 600 at preset intervals. Here, the coating layer 600 may include remaining coating layers 610a and 610b and a coating layer 620 to be removed.

Referring to FIG. 5, the remaining coating layers 610a and 610b are coating layers 600 that remain on the surface of the electrode foil 500 after the coating layer 600 is cut by the cutting unit 100. And, the coating layer 620 to be removed is the coating layer 600 that is cut by the cutting unit 100 and then removed by the removal unit 200.

When the coating layer 620 to be removed in FIG. 5 is removed, only the remaining coating layers 610a and 610b remain on the surface of the electrode foil 500 as shown in FIG. 6. That is, a plurality of coating layers 600 (two coating layers 610a and 610b in FIG. 6) remain on the electrode foil 500.

In this regard, for example, if a coating layer 600 with a width of 30 mm is required, the conventional dry electrode manufacturing system produces one 30 mm coating layer 600 on one electrode foil 500 through one continuous rolling process. Only one dry electrode can be formed.

However, the dry electrode manufacturing system 1 according to an embodiment of the present invention includes a coating layer processing device 10 for a dry electrode, and the coating layer processing device 10 for a dry electrode has, for example, a coating layer 600 of 70 mm. For this formed single electrode foil 500, a plurality of cutting units 100 cut and remove 10 mm from the center of the coating layer 600, thereby forming two 30 mm coating layers 600 (see FIG. 6). In addition, when the splitting device 20 (see FIG. 10), which will be described later, cuts and divides one electrode foil 500, two dry electrodes with a 30 mm coating layer 600 can be created.

Here, the width of the coating layer 600 is not limited to 30 mm and may vary. Additionally, the widths of the two coating layers 600 may not be the same and may be formed differently. For example, in the above-described embodiment, if the center of the 70 mm coating layer 600 is removed by 20 mm, one 30 mm coating layer 600 and one 20 mm coating layer 600 can be formed. Alternatively, 20 mm of the center of the 70 mm coating layer 600 may be removed to form one 40 mm coating layer 600 and one 10 mm coating layer 600. However, this is only one embodiment, and more various embodiments may be applied.

Referring to FIGS. 4 and 5 , the cutting unit 100 may include a first cutting unit 110 and a second cutting unit 120. The first cutting unit 110 cuts one side of the coating layer 600. Then, the second cutting unit 120 is spaced apart from the first cutting unit 110 and cuts the other side of the coating layer 600.

The remaining coating layer 610a is located on the outside of the first cutting unit 110 after the coating layer 600 is cut by the cutting unit 100. And, the remaining coating layer 610b is located outside the second cutting unit 120 after the coating layer 600 is cut by the cutting unit 100.

And, the coating layer 620 to be removed is located between the first cutting unit 110 and the second cutting unit 120.

Here, when the removal unit 200, which will be described later, removes the coating layer 620 to be removed located between the first cutting unit 110 and the second cutting unit 120, the remaining coating layers 610a and 620b as shown in FIG. 6. There is only one left.

In FIG. 5 , the width of the remaining coating layer 610a and the width of the remaining coating layer 610b are the same, but in a modified embodiment, the width of the remaining coating layer 610a and the width of the remaining coating layer 610b may be formed to be different.

Figure 7 is a diagram according to another embodiment of Figure 5.

Referring to FIG. 7, the cutting unit 100 includes a first cutting unit 110, a second cutting unit 120, a third cutting unit 130, and a fourth cutting unit 140. It can be. The first cutting unit 110 cuts one side of the coating layer 600, and the second cutting unit 120 is spaced apart from the first cutting unit 110 to cut the other side of the coating layer 600 as shown in FIG. It is similar to example.

The third cutting unit 130 is disposed between the first cutting unit 110 and the second cutting unit 120, and is disposed closer to the first cutting unit 110 than the second cutting unit 120. And, the fourth cutting unit 140 is disposed between the first cutting unit 110 and the second cutting unit 120, and is disposed closer to the second cutting unit 120 than the first cutting unit 110. .

In FIG. 7 , the remaining coating layer 610a is located outside the first cutting unit 110 after the coating layer 600 is cut by the cutting unit 100. And, the remaining coating layer 610b is located outside the second cutting unit 120 after the coating layer 600 is cut by the cutting unit 100. And, the remaining coating layer 610c is disposed between the third cutting unit 130 and the fourth cutting unit 140.

And, the coating layer to be removed (620a) is located between the first cutting unit 110 and the third cutting unit 130, and the coating layer to be removed (620b) is located between the second cutting unit 120 and the fourth cutting unit 140. ) is located between.

In FIG. 7, the width of the remaining coating layer 610a, the width of the remaining coating layer 610b, and the width of the remaining coating layer 610c are the same, but in a modified example, the widths of each of the remaining coating layers 610a, 610b, and 610c are It may be formed differently.

FIG. 8 is a diagram according to another embodiment of FIG. 5.

Referring to FIG. 8, the cutting unit 100 includes a first cutting unit 110, a second cutting unit 120, a third cutting unit 130, a fourth cutting unit 140, and a fifth cutting unit 100. It may be configured to include a cutting unit 150 and a sixth cutting unit 160. The first cutting unit 110 cuts one side of the coating layer 600, and the second cutting unit 120 is spaced apart from the first cutting unit 110 to cut the other side of the coating layer 600, as shown in FIGS. 5 and 5 . It is common with Example 7.

The third cutting unit 130 is disposed between the first cutting unit 110 and the second cutting unit 120 and is closest to the first cutting unit 110. And, the fourth cutting unit 140 is disposed adjacent to the third cutting unit 130 and closer to the first cutting unit 110 than the second cutting unit 120.

The fifth cutting unit 150 is disposed adjacent to the fourth cutting unit 140 and closer to the second cutting unit 120 than the first cutting unit 110. And, the sixth cutting unit 160 is disposed adjacent to the fifth cutting unit 150 and closest to the second cutting unit 120.

In FIG. 8 , the remaining coating layer 610a is located outside the first cutting unit 110 after the coating layer 600 is cut by the cutting unit 100. And, the remaining coating layer 610b is located outside the second cutting unit 120 after the coating layer 600 is cut by the cutting unit 100. And, the remaining coating layer 610c is disposed between the third cutting unit 130 and the fourth cutting unit 140. And, the remaining coating layer 610d is disposed between the fifth cutting unit 150 and the sixth cutting unit 160.

And, the coating layer to be removed (620a) is located between the first cutting unit 110 and the third cutting unit 130, and the coating layer to be removed (620b) is located between the fourth cutting unit 140 and the fifth cutting unit 150. ), and the coating layer to be removed (620c) is located between the second cutting unit 120 and the sixth cutting unit 160.

Meanwhile, in FIG. 7, the width of the remaining coating layer 610a, the width of the remaining coating layer 610b, the width of the remaining coating layer 610c, and the width of the remaining coating layer 610d are the same, but in a modified embodiment, each remaining coating layer 610d is the same. The widths of the coating layers 610a, 610b, 610c, and 610d may be formed differently.

And, in addition to FIGS. 5, 7, and 8, many other variations of the embodiment are possible.

Referring to Figure 4, the cutting unit 100 may be coupled to the coupling shaft 400. Here, the cutting unit 100 may be configured to move along the coupling axis 400 to adjust the cutting width of the coating layer 600. Additionally, an LM guide (not shown) may be provided on the coupling shaft 400 to guide the movement of the cutting unit 100, but is not limited thereto.

As the cutting unit 100 is configured to move along the coupling axis 400, the coating layer 600 can have various widths.

Referring to Figures 3 and 4, the removal unit 200 is configured to remove a portion of the coating layer 600 cut by the cutting unit 100. That is, the removal unit 200 removes the coating layer 620 to be removed.

The removal unit 200 may be configured in various ways and may include, for example, a scraping member 210. The scraping member 210 is configured to scrape the coating layer 620 to be removed and may be disposed to make oblique contact with the coating layer 620 to be removed.
Here, referring to FIG. 3 , the scraping member 210 may be disposed at the rear of the cutting unit 100 based on the moving direction of the electrode foil 500.
And, referring to FIG. 4, the width of the scraping member 210 corresponds to the width between the first cutting unit 110 and the second cutting unit 120, which moves along the coupling axis 400 and stops. It can be configured.

That is, when the coating layer 600 is cut by the cutting unit 100 and separated into the remaining coating layers 610a and 610b and the coating layer to be removed 620, the scraping member 210 contacts the coating layer to be removed 620 to form an electrode foil. The coating layer 620 to be removed is removed from 500 .

Here, the inclination of the scraping member 210 can be adjusted. That is, as shown in FIG. 3, the scraping member 210 is in oblique contact with the coating layer 620 to be removed. By adjusting the inclination of the scraping member 210, the inclination for removal of the coating layer 620 to be removed can be optimized. .

Additionally, the removal unit 200 may include a suction member 220 that suctions the coating layer 620 to be removed scraped by the scraping member 210. Referring to FIG. 3, the suction member 220 adsorbs the coating layer 620 to be removed, separated from the electrode foil 500 by the scraping member 210, and completely removes it from the electrode foil 500. The suction member 220 may be diverse, and may be provided to adsorb the coating layer 620 to be removed through, for example, air suction.

The receiving unit 300 receives the coating layer 620 to be removed removed from the removal unit 200. The coating layer 620 to be removed accommodated in the receiving unit 300 may be simply discharged, but may also be reused to reduce costs. For this purpose, the receiving unit 300 may be connected to a reuse unit (not shown).

Figure 9 is a diagram schematically showing a dry electrode manufacturing system according to an embodiment of the present invention, and Figure 10 is a diagram showing a dividing device and a plurality of rewinders in the dry electrode manufacturing system according to an embodiment of the present invention. .

Referring to FIG. 9, the dry electrode manufacturing system 1 mixes the electrode active material, binder, conductive material, and filler without a liquid medium such as a solvent or dispersion medium, and then mixes the powder 40, which is a powder mixture, with a rolling roller 50. ) is passed through and compressed, and the powder 40 is coated on the electrode foil 500 to form a coating layer 600.

In addition, the dry electrode manufacturing system 1 according to an embodiment of the present invention may include the above-described coating layer processing apparatus 10 for dry electrode. However, the detailed description of the dry electrode coating layer processing apparatus 10 is replaced with the above description.

And, referring to FIG. 10, the dry electrode manufacturing system 1 may include a splitting device 20. The splitting device 20 is configured to cut and split the electrode foil 500 between the plurality of coating layers 600. The dividing device 20 may be diverse, for example, but is not limited to a slitter.

In addition, referring to FIG. 10, the dry electrode manufacturing system 1 may include a plurality of rewinders 30 that independently wind each of the plurality of electrode foils 500 divided by the dividing device 20. .

As described above, according to the present invention, a plurality of dry electrodes can be manufactured through one continuous rolling process. As a result, the manufacturing time and cost required to manufacture a plurality of dry electrodes can be reduced and manufacturing efficiency can be improved.

In addition, after the cutting unit 100 cuts the coating layer 600 along the cutting target line of the coating layer 600 using a laser or a blade, the scraping member 210 scrapes and removes the coating layer 620 to be removed. , the edge line of the coating layer 600 can be made uniform, and as a result, the quality of the dry electrode can be improved and the yield of good products can be increased.

In addition, a plurality of coating layers 600 are formed on one electrode foil 500, thereby facilitating the manufacture of a plurality of dry electrodes. Additionally, dry electrodes of various sizes can be produced using a single dry electrode manufacturing system (1).

Furthermore, it goes without saying that embodiments according to the present invention can solve various technical problems other than those mentioned in this specification in the relevant technical field as well as related technical fields.

In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are only for convenience of explanation, and may vary depending on the location of the object or the location of the observer, etc., as those skilled in the art will understand. It is self-explanatory.

Although the present invention has been described above with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the description below will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims. Therefore, the previously disclosed embodiments should be considered from an explanatory perspective rather than a limiting perspective. In other words, the scope of the true technical idea of the present invention is shown in the claims, and all differences within the scope of equivalents should be construed as being included in the present invention.

1: Dry electrode manufacturing system
10: Coating layer processing device for dry electrode 20: Splitting device
30: Rewinder
10: Coating layer processing device for dry electrode
100: cutting unit 110: first cutting unit
120: second cutting unit 130: third cutting unit
140: 4th cutting unit 150: 5th cutting unit
160: 6th cutting unit 200: removal unit
210: scraping member 220: suction member
300: receiving unit 400: coupling shaft
500: electrode foil 600: coating layer
610: Remaining coating layer 620: Coating layer to be removed

Claims (15)

A coating layer processing device for a dry electrode that forms a plurality of coating layers by cutting one coating layer formed on the surface of an electrode foil,
A plurality of cutting units for cutting the coating layer; and
It includes a removal unit that removes a portion of the coating layer cut by the cutting unit,
The coating layer is,
A residual coating layer remaining on the surface of the electrode foil after being cut by the cutting unit; and
It includes a coating layer to be removed that is cut by the cutting unit and then removed by the removal unit,
The cutting unit is,
A first cutting unit cutting one side of the coating layer; and
It includes a second cutting unit spaced apart from the first cutting unit and cutting the other side of the coating layer,
The cutting unit is a blade,
The cutting unit is coupled to the coupling axis and configured to move along the coupling axis to adjust the cutting width of the coating layer,
The removal unit includes a scraping member that scrapes the coating layer to be removed,
The scraping member is disposed at the rear of the cutting unit based on the moving direction of the electrode foil,
The width of the scraping member is configured to correspond to the width between the first cutting unit and the second cutting unit, which moves along the coupling axis and stops,
The scraping member is in oblique contact with the coating layer to be removed,
A coating layer processing device for a dry electrode, characterized in that the inclined inclination of the scraping member is configured to be adjustable. delete delete According to paragraph 1,
A coating layer processing device for a dry electrode, characterized in that the plurality of cutting units are arranged to be spaced apart from each other. delete According to paragraph 1,
After cutting the coating layer by the cutting unit, the remaining coating layer is located on the outside of the first cutting unit and the outside of the second cutting unit, and the coating layer to be removed is between the first cutting unit and the second cutting unit. A coating layer processing device for a dry electrode, characterized in that it is located. According to paragraph 4,
The cutting unit is,
A first cutting unit cutting one side of the coating layer;
a second cutting unit spaced apart from the first cutting unit to cut the other side of the coating layer;
a third cutting unit disposed between the first cutting unit and the second cutting unit, and disposed closer to the first cutting unit than the second cutting unit; and
A coating layer processing device for a dry electrode, comprising a fourth cutting unit disposed between the first cutting unit and the second cutting unit, and disposed closer to the second cutting unit than the first cutting unit. delete delete delete According to paragraph 1,
The removal unit is a coating layer processing device for a dry electrode, characterized in that it further includes a suction member that suctions the coating layer to be removed scraped by the scraping member. According to paragraph 1,
A coating layer processing device for a dry electrode, further comprising a receiving unit for receiving the coating layer to be removed in order to reuse the coating layer to be removed from the removal unit. A dry electrode manufacturing system comprising a coating layer processing apparatus for a dry electrode according to any one of claims 1, 4, 6, 7, 11, and 12. According to clause 13,
A dry electrode manufacturing system comprising a dividing device that cuts and divides the electrode foil between the plurality of coating layers. According to clause 14,
A dry electrode manufacturing system comprising a plurality of rewinders that independently wind each of the plurality of electrode foils divided by the dividing device.

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