Electrode manufacturing system and method for manufacturing electrode

Abstract

An electrode manufacturing system according to the present disclosure may include: a coating section that coats a coating material on a coating substrate; and a drying portion drying the coating material, the drying portion may include at least one linear infrared lamp irradiating infrared rays to the coating substrate, and both ends of the infrared lamp may be disposed vertically aligned with both edges of the coating material.

Description

Technical Field

[0001] The present disclosure relates to an electrode manufacturing system for a secondary battery. Background Art

[0002] Unlike a primary battery, a secondary battery can be charged and discharged, and thus can be applied to various fields such as digital cameras, mobile phones, laptop computers, hybrid vehicles, and electric vehicles. In recent years, research on lithium secondary batteries with high energy density and discharge voltage has been actively conducted.

[0003] Generally, an electrode plate of a lithium secondary battery is manufactured through a process of coating a positive electrode active material or a negative electrode active material on a substrate to be coated such as an aluminum sheet or a copper sheet (hereinafter also referred to as a "coated substrate") and a process of drying the active material.

[0004] The coating process and the drying process have a great influence on the quality of the secondary battery. However, in the prior art, due to various reasons, the phenomenon of partial drying or over-drying of the active material of the electrode after the drying process occurs. This phenomenon is aggravated when the moving speed of the electrode is increased.

[0005] Therefore, a device or manufacturing system capable of uniformly drying the electrode is required. Summary of the Invention

[0006] (I) Technical Problem to be Solved

[0007] According to one aspect of the present disclosure, an electrode manufacturing system capable of maintaining uniform drying performance and thus capable of providing uniform dryness and / or a coating material uniformly coated on a substrate to be coated (coated substrate) can be provided. The electrode manufacturing system of the present disclosure is applicable to manufacturing a secondary battery electrode by coating a positive electrode or a negative electrode active material on a suitable substrate to be coated ("coated substrate").

[0008] The secondary battery manufactured by the electrode manufacturing system of the present disclosure can be widely applied to green technology fields such as electric vehicles, battery charging stations, and other devices using batteries for solar power generation, wind power generation, or the like. In addition, the secondary battery manufactured by the electrode manufacturing system of the present disclosure can be used for eco-friendly electric vehicles (Electric Vehicle), hybrid vehicles, etc. that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0009] (II) Technical Solution

[0010] An electrode manufacturing system according to the present disclosure includes: a coating unit that coats a coating material on a coated substrate; and a drying unit that dries the coating material. The drying unit includes at least one linear infrared lamp that irradiates infrared rays onto the coated substrate, and both ends of the infrared lamp are arranged to be vertically aligned with two edges of the coating material.

[0011] In the electrode manufacturing system, the length of the linear infrared lamp can be set or formed to be the same as the width W of the coating material coated on the coated substrate.

[0012] In one embodiment, the separation distance between the infrared lamp and the coating material can be 5 cm to 10 cm.

[0013] In one embodiment, the infrared lamp can be arranged to be rotatable about a rotation axis formed along a direction orthogonal to the surface direction of the coated substrate.

[0014] In one embodiment, the rotation axis can be provided at the center in the length direction of the infrared lamp.

[0015] In one embodiment, the infrared lamp can be arranged along an oblique line direction inclined with respect to the width direction of the coating material or can be arranged parallel to the width direction of the coating material.

[0016] In one embodiment, the infrared lamp can include: a first lamp that rotates about a first rotation axis; and a second lamp that rotates about a second rotation axis. The first rotation axis and the second rotation axis can be provided on a straight line parallel to the width direction of the coating material.

[0017] In one embodiment, the first rotation axis can be formed at one end of the first lamp, the second rotation axis can be formed at the other end of the second lamp, and the other end of the first lamp and one end of the second lamp can be respectively located at two edges of the coating material.

[0018] In one embodiment, the first lamp and the second lamp can be arranged in a "V" shape or in a straight line.

[0019] In one embodiment, the drying unit can further include a hot air supply device that supplies hot air to the coating material.

[0020] In one embodiment, the hot air supply device can include a plurality of hot air supply nozzles that spray the hot air onto the coating material. In the drying unit, the plurality of hot air supply nozzles and the plurality of infrared lamps can be alternately arranged along the moving direction of the coated substrate.

[0021] According to an embodiment of the electrode manufacturing system, the coating material may be a positive electrode active material or a negative electrode active material. According to another embodiment of the electrode manufacturing system, the coating substrate may be a secondary battery electrode substrate; and the coating substrate may include an aluminum sheet or a copper sheet.

[0022] According to another aspect of the present disclosure, the electrode manufacturing system of the present disclosure can be used to manufacture secondary battery electrodes.

[0023] In another aspect, the present disclosure provides a method for manufacturing an electrode, particularly a secondary battery electrode, the method comprising the steps of: coating a coating material on a coating substrate moving along a path; and drying the coating material coated on the coating substrate; wherein the drying step includes drying by at least one linear infrared lamp that irradiates infrared rays onto the coating material, wherein the two ends of the at least one linear infrared lamp are aligned with the two edges of the coating material.

[0024] In another embodiment of the method for manufacturing an electrode, the length of the linear infrared lamp may be set or formed to be the same as the width W of the coating material coated on the coating substrate; or the two ends of the projected infrared lamp coincide with the two edges of the coating material.

[0025] (III) Beneficial effects

[0026] According to an embodiment of the present disclosure, even if the moving speed of the coating substrate coated with the coating material is increased, the coating material can be dried uniformly, thereby improving the product yield. Brief description of the drawings

[0027] Figure 1 is a diagram schematically showing an electrode manufacturing system according to an embodiment of the present disclosure.

[0028] Figure 2 is a diagram showing Figure 1 the drying part of

[0029] Figure 3 is a cross-sectional view taken along the I-I' line of Figure 2

[0030] Figure 4 is a cross-sectional view taken along the II-II' line of Figure 3

[0031] Figure 5 is a graph showing the thickness of the coating material according to various forms of infrared lamps.

[0032] Figure 6 is a diagram for explaining Figure 3 each experimental example of

[0033] ​​Figure 7 and Figure 8 is a diagram schematically showing an electrode manufacturing system according to another embodiment.

[0034] Figure 9 and Figure 10 is a diagram schematically showing an electrode manufacturing system according to still another embodiment.

[0035] Description of reference numerals:

[0036] 10: Uncoiler

[0037] 20: Rewinder

[0038] 30: Coating section

[0039] 40: Drying section

[0040] 43: Hot air drying nozzle

[0041] 44: Infrared lamp

[0042] 45: Irradiation area Detailed description of the specific embodiments

[0043] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. However, this is merely exemplary, and the present disclosure is not limited to the specific embodiments described by way of example.

[0044] The present disclosure can be implemented in some embodiments to provide an electrode manufacturing system. In the present disclosure, the term "coated substrate" refers to a substrate that undergoes a coating process of the electrode manufacturing system or a substrate on which a coated substrate is formed accordingly. In the present disclosure, a linear infrared lamp refers to an infrared lamp that emits infrared radiation in a linear mode. In the present disclosure, "vertical alignment" between the two ends of the infrared lamp and the two edges of the coating material can refer to substantially co-alignment, that is, it can refer to setting the infrared lamp such that when the infrared lamp is projected in a direction perpendicular to the coating material, the two ends of the projected infrared lamp coincide with the two edges of the coating material. Here, the term "substantially" can include a tolerance range. For example, in the width direction of the coating material, the tolerance range can be ±25 mm; and / or, the term "substantial" can include that the linear infrared lamp has connectors. In this case, the actual infrared-emitting part of the infrared lamp can start from a position separated by a predetermined distance from the connectors of the infrared lamp, where such separation can extend from the two ends of the infrared lamp in the end portions. Figure 1 is a diagram schematically showing an electrode manufacturing system according to an embodiment of the present disclosure, Figure 2 is a diagram showing Figure 1 the drying section of Figure 3 is a cross-sectional view taken along the Figure 2 I-I' line of Figure 4is a cross-sectional view taken along the Figure 3 line II-II' of

[0045] Referring to Figures 1 to 4 , the electrode manufacturing system of a secondary battery according to the present embodiment may include: an unwinder 10 that unwinds and supplies a coated substrate 5 (i.e., a substrate to be coated); a coating unit 30 that coats a coating material 6 on a coating area of the coated substrate 5; a drying unit 40 that dries the coating material 6; and a rewinder 20 that rewinds the coated substrate 5.

[0046] In the present embodiment, the coated substrate 5 may be provided in the form of a thin strip having a predetermined width, and may refer to a metal thin film for manufacturing an electrode of a secondary battery. For example, an aluminum sheet or an aluminum thin film may be used for the coated substrate 5 when manufacturing a positive electrode, and a copper sheet or a copper thin film may be used when manufacturing a negative electrode.

[0047] The coated substrate 5 may be supplied from the unwinder 10, move along a preset path, and then be rewound in the rewinder 20. During this process, the coated substrate 5 may sequentially pass through the coating unit 30 and the drying unit 40. To this end, the electrode manufacturing system of the present embodiment may include a transfer device that transfers the coated substrate 5 in the above order. For example, the transfer device may include a plurality of rollers 4 that support and rotate the coated substrate 5.

[0048] The unwinder 10 may unwind the coated substrate 5 wound in a roll form and supply it to the coating unit 30. As described above, the coated substrate 5 supplied from the unwinder 10 may be a metal sheet or a metal thin film such as an aluminum sheet or an aluminum thin film or a copper sheet or a copper thin film.

[0049] The coating unit 30 may coat the coating material 6 on the coated substrate 5 supplied and moved from the unwinder 10. To this end, the coating unit 30 may include a Slot Die Coater 32, but is not limited thereto.

[0050] The coating material 6 may use an active material in a slurry state, and the coating processes for the positive electrode and the negative electrode may be performed in the same form. In the present embodiment, a case where the coating material 6 is coated only on one side of the coated substrate 5 is illustrated, but the coating material 6 may be coated on both sides of the coated substrate 5 as needed.

[0051] After the coating material 6 is applied to the coated substrate 5, the drying unit 40 may dry the coating material 6. The drying unit 40 may include at least one chamber through which the coating material 6 may pass, and moisture of the coating material 6 may be removed by applying heat to the coating material 6 passing through the inside of the chamber. To this end, the drying unit 40 of the present embodiment may include a first heat source and a second heat source.

[0052] The first heat source and the second heat source can be heat sources in different forms. For example, the first heat source can include a hot air supply device 42 that supplies hot air at a set temperature to the coating material 6. Additionally, the second heat source can include a heater that applies radiant heat to the coating material 6.

[0053] The drying unit 40 of this embodiment can alternately supply the thermal energy supplied by the first heat source and the thermal energy supplied by the second heat source to the coating material 6. As Figure 2 shown, the first heat source can include a plurality of hot air supply nozzles 43 arranged at a predetermined interval, and a plurality of second heat sources can be dispersedly arranged between the hot air supply nozzles 43.

[0054] In this embodiment, the infrared lamp 44 can be used as the second heat source. Therefore, within the drying unit 40, the plurality of hot air supply nozzles 43 and the plurality of infrared lamps 44 can be alternately arranged along the moving direction of the coated substrate 5, and the coating material 6 coated on the coated substrate 5 can be repeatedly heated by high-temperature hot air and infrared rays to remove the solvent.

[0055] As Figure 3 shown, in this embodiment, the infrared lamp 44 can be arranged between two hot air supply nozzles 43. Therefore, an irradiation area 45 can be formed between the two hot air supply nozzles 43. For example, one irradiation area 45 can refer to the area where the infrared rays emitted by one or more infrared lamps 44 located between two hot air supply nozzles 43 irradiate the coating material 6.

[0056] On the other hand, when the process speed is increased to increase the production speed of the electrode, the coating material 6 may dry unevenly. If the hot air supply amount or the output of the infrared lamp 44 is increased in consideration of this, cracks may appear on the side surface of the coating material 6.

[0057] Therefore, the applicant confirmed the drying state of the coating material 6 by changing the linear infrared lamp 44 as the second heat source in various forms.

[0058] Figure 5 is a graph showing the thickness of the coating material according to infrared lamps in various forms, Figure 6 is for explaining Figure 3 each experimental example of.

[0059] Here, Figure 5 shows the thickness distribution of the coating material 6 measured by cross-sectioning the coating material 6 coated on the left region among the coating materials 6, 6' coated on two regions of one coated substrate 5 during the manufacturing process of forming an electrode by coating the coating materials 6, 6' on two regions of one coated substrate 5. Additionally, Figure 6Panels (a) and (c) show cross-sections corresponding to the cross-section taken along line II-II' of Figure 3 and panel (b) shows a cross-section corresponding to the cross-section taken along line I-I' of Figure 2 .

[0060] Referring together to Figure 5 and Figure 6 , in Comparative Experimental Example 1, as shown in panel (a) of Figure 6 , the length of the infrared lamp 44 is longer than the width of the coated substrate 5. Therefore, the infrared lamp 44 is arranged such that at least a part thereof protrudes outside the coated substrate 5.

[0061] Referring to the graph of Comparative Experimental Example 1, the thickness of the coating material 6 increases towards the right side of the coating material 6. It can be inferred therefrom that the left edge portion of the coating material 6 in Comparative Experimental Example 1 has a high degree of dryness and the right edge portion has a low degree of dryness.

[0062] The reason for this result is that since the infrared lamp 44 is arranged outside the coated substrate 5, more heat is applied to the left edge of the coating material 6, and it can be seen that this portion is overdried.

[0063] In Comparative Experimental Example 2, as shown in panel (b) of Figure 6 , two infrared lamps 441 and 442 with different lengths are arranged to irradiate an irradiation area 45. The lamp 442 with the longer length is similar to the infrared lamp 44 applied in Comparative Experimental Example 1, and the length of the lamp 441 with the shorter length is less than the width of the coating material 6, and the lamp 441 with the shorter length is arranged at the central portion of the coating material 6 such that the entire lamp 441 with the shorter length faces the coating material 6. In addition, since two infrared lamps 441 and 442 are used, the outputs of the lamp 442 with the longer length and the lamp 441 with the shorter length are reduced compared to Comparative Experimental Example 1.

[0064] Referring to the graph of Comparative Experimental Example 2, it can be seen that the thickness deviation of the coating material 6 is reduced compared to Comparative Experimental Example 1. However, the thickness of the coating material 6 at the central portion is thinner than that at the edge portion adjacent to the coated substrate 5. That is, in Comparative Experimental Example 2, since the second lamp 44 is additionally arranged at the central portion of the coating material 6, the thickness deviation is reduced compared to Comparative Experimental Example 1, but thickness deviations occur between the two edge portions adjacent to the coated substrate 5 and the central portion.

[0065] Therefore, in Comparative Experimental Example 2, it can be judged that the central portion with a thinner thickness is overdried, or the edge portion with a thicker thickness is not sufficiently dried.

[0066] In Comparative Experimental Example 3, as shown in Figure 6As shown in (c) thereof, in addition to the configuration of Experimental Example 1, a baffle 47 is provided along the edge of the coating material 6, i.e., the boundary between the coating material 6 and the coated substrate 5. In Figure 5 it, the dashed line C represents Figure 6 the right boundary C of the baffle 47 in (c) thereof. The baffle 47 is provided between the infrared lamp 44 and the coated substrate 5, and at least a part of the baffle 47 faces the coating material 6.

[0067] In Experimental Example 3, the baffle 47 was applied to compensate for the excessive drying in a specific area in Experimental Example 1. It can be seen that the overall curve graph shape is similar to that of Experimental Example 1, but the thickness of the part of the coating material 6 facing the baffle 47 increases sharply. That is, it can be confirmed that the heat of the infrared lamp 44 is excessively blocked by the baffle 47, so that the heat cannot be normally transferred to the left edge of the coating material 6.

[0068] In Experimental Example 4 according to the present disclosure, as Figure 3 and Figure 4 shown, the length of the infrared lamp 44 is the same as the width W of the coating material 6. Specifically, in Experimental Example 4, the infrared lamp 44 is arranged such that both ends of the infrared lamp 44 are vertically aligned with the two edges of the coating material 6. Here, the vertical alignment may mean arranging the infrared lamp 44 such that when the infrared lamp 44 is vertically projected onto the coating material 6, both ends of the projected infrared lamp 44 coincide with the two edges of the coating material 6. That is, it can be understood that both ends of the infrared lamp 44 are in contact with the vertical lines formed by the two edges of the coating material 6. Referring to the curve graph of Experimental Example 4, it can be confirmed that the thickness deviation of the coating material 6 is small and the thickness of the coating material 6 is generally similar. Therefore, when the infrared lamp 44 is arranged such that both ends of the infrared lamp 44 coincide with the two edges of the coating material 6, the coating material 6 is dried most uniformly.

[0069] In Experimental Example 4, since the irradiation area 45 is formed as Figure 3 shown, relatively little infrared light can be irradiated to the two edge portions of the coating material 6. Therefore, it is difficult to consider that the irradiation amount of the infrared light is uniformly irradiated onto the coating material 6. However, as confirmed by the above experimental examples, since there is a tendency for the edge portion of the coating material 6 to be dried more than the central portion in the drying method using the infrared lamp 44, it can be understood that when relatively little infrared light is irradiated to the edge of the coating material 6, the coating material 6 is dried uniformly as a whole.

[0070] Therefore, the electrode manufacturing system according to the present embodiment can consider the above Experimental Example 4 as the optimal drying condition, form the infrared lamp 44 as a linear lamp 44, and arrange the infrared lamp 44 such that both ends of the infrared lamp 44 coincide with the two edges of the coating material 6.

[0071] On the other hand, even when drying is carried out under the same conditions, the drying state of the coating material 6 changes according to the output of the infrared lamp 44 and the amount of heat energy transferred to the coating material 6. Therefore, the output of the infrared lamp 44 or the distance between the infrared lamp 44 and the coating material 6 can be appropriately changed according to the composition, thickness, moving speed, etc. of the coating material 6.

[0072] However, the farther the infrared lamp 44 is from the coating material 6, the more the infrared rays irradiated by the infrared lamp 44 spread. Therefore, if the separation distance between the infrared lamp 44 and the coating material 6 is too far, the above-mentioned irradiation area 45 may expand excessively. For example, even if the infrared lamp 44 is set as in Experimental Example 4, if the separation distance between the infrared lamp 44 and the coating material 6 is too far, an irradiation area 45 similar to that in Experimental Example 1 may be formed. In addition, if the separation distance between the infrared lamp 44 and the coating material 6 is too close, the irradiation area 45 of the infrared rays will become narrow, and drying cannot be effectively carried out.

[0073] Taking this into consideration, in the present disclosure and this embodiment, the separation distance between the infrared lamp 44 and the coating material 6 can be formed within the range of 5 cm to 10 cm. However, this embodiment is not limited thereto, and the separation distance can be adjusted within the range where the irradiation range does not exceed the coating substrate 5.

[0074] In addition, generally, the region where the infrared lamp 44 actually emits infrared rays is smaller than the entire region of the infrared lamp 44. For example, at least one of the two end portions of the infrared lamp 44 may be provided with a connector. In this case, the actual (substantial) infrared ray-emitting portion of the infrared lamp 44 may start from a position at a predetermined distance from the connector of the infrared lamp 44. Therefore, in this embodiment, the two ends of the infrared lamp 44 may refer to the two ends of the region where the infrared lamp 44 actually emits infrared rays.

[0075] In addition, in the present disclosure and this embodiment, the perpendicular alignment of the two ends of the infrared lamp 44 with the two edges of the coating material 6 may include a tolerance range. For example, the tolerance range may be ±25 mm in the width direction of the coating material 6.

[0076] The electrode manufacturing system of this embodiment configured in this way can uniformly dry the coating material 6 even when the moving speed of the coating substrate 5 coated with the coating material 6 is increased, thereby improving the product yield.

[0077] Hereinafter, the embodiments of the present disclosure will be further described with reference to specific experimental examples. The embodiments and comparative examples included in the experimental examples are only illustrative of the present disclosure and are not intended to limit the appended claims. It will be obvious to those skilled in the art that various changes and modifications can be made to the embodiments.

[0078] Figure 7 and Figure 8 is a diagram schematically showing an electrode manufacturing system according to another embodiment, showing a cross-section corresponding to Figure 3 corresponding cross-section.

[0079] Referring to Figure 7 and Figure 8 , the infrared lamp 44 of the present embodiment can be arranged to be rotatable above the coating material 6.

[0080] Specifically, each infrared lamp 44 can form a rotation axis R at the center in the length direction and can rotate around the rotation axis R. The rotation axis R can be arranged in a direction orthogonal to the surface direction of the coated substrate 5 (e.g., the XY plane). The infrared lamp 44 can be rotated by various known rotation driving devices such as a motor.

[0081] Since the infrared lamp 44 is rotatably arranged, the infrared lamp 44 of the present embodiment can be arranged in an inclined line direction inclined with respect to the width direction of the coating material 6 (e.g., the Y direction) as shown in Figure 7 , or can be arranged parallel to the width direction of the coating material 6 as shown in Figure 8 .

[0082] The infrared lamp 44 of the present embodiment can rotate corresponding to the width of the coating material 6. For example, as shown in Figure 7 , when the width of the coating material 6 is W1, the infrared lamp 44 can be arranged in an inclined line direction inclined with respect to the width of the coating material 6 corresponding to the width of the coating material 6. Therefore, both ends of the infrared lamp 44 can be arranged to correspond to the two edges of the coating material 6.

[0083] In addition, as shown in Figure 8 , when the width of the coating material 6 is W2, the infrared lamp 44 can rotate, so both ends of the infrared lamp 44 can be arranged to correspond to the two edges of the coating material 6 with a width of W2.

[0084] The electrode manufacturing system of the present embodiment described above can dry using the same infrared lamp 44 even when the width of the coating material 6 is changed, so electrodes of various sizes can be manufactured using one electrode manufacturing system.

[0085] Figure 9 and Figure 10 is a diagram schematically showing an electrode manufacturing system according to still another embodiment, showing a cross-section corresponding to Figure 3 corresponding cross-section.

[0086] Referring to Figure 9 and Figure 10, in the electrode manufacturing system of this embodiment, a plurality of infrared lamps 44a, 44b can form an irradiation area 45. Additionally, the two infrared lamps 44a, 44b can be respectively set to be rotatable.

[0087] Specifically, the infrared lamps 44a, 44b irradiating the irradiation area 45 can include a first lamp 44a and a second lamp 44b, and the first lamp 44a and the second lamp 44b can respectively rotate around different rotation axes R1, R2. The first rotation axis R1 serving as the rotation axis of the first lamp 44a can be located at one side end of the first lamp 44a, and the second rotation axis R2 serving as the rotation axis of the second lamp 44b can be located at the other side end of the second lamp 44b. For example, the first rotation axis R1 and the second rotation axis R2 can be formed at the ends of each of the lamps 44a, 44b that are arranged on the inner side of the coating material 6. Therefore, the first rotation axis R1 and the second rotation axis R2 can be arranged adjacent to each other and can be arranged on a straight line parallel to the width direction of the coating material 6.

[0088] Similar to the above embodiment, each rotation axis R1, R2 can be arranged in a direction orthogonal to the surface direction of the coating substrate 5 (e.g., the XY plane), and the first lamp 44a and the second lamp can be rotated by various known rotation driving devices such as a motor.

[0089] The first lamp 44a and the second lamp 44b of this embodiment can be arranged in a "V" shape as Figure 9 shown, or can be arranged parallel to the width direction of the coating material 6 (e.g., the Y direction) as Figure 10 shown.

[0090] Similar to the above embodiment, the infrared lamp 44 of this embodiment can also rotate corresponding to the width of the coating material 6. For example, as Figure 9 shown, when the width of the coating material 6 is W1, the infrared lamp 44 can be arranged in a "V" shape corresponding to the width of the coating substrate 5, and the other side end of the first lamp 44a and the one side end of the second lamp 44b can be arranged corresponding to the two edges of the coating material 6. Here, W1 can be shorter than the total length of the first lamp 44a and the second lamp 44b.

[0091] Additionally, as Figure 10 shown, when the width of the coating material 6 is W3, the first lamp 44a and the second lamp 44b can rotate to be arranged on a straight line parallel to the width direction of the coating material 6, so that the two ends of the infrared lamp 44 can be arranged corresponding to the two edges of the coating material 6 with a width of W3.

[0092] As described above, the electrode manufacturing system of this embodiment can manufacture electrodes by setting the infrared lamp 44 in various forms according to the width of the coating material 6.

[0093] The content described above is only an example of applying the principles of the present disclosure, and other configurations may be included in the present disclosure.

[0094] For example, the above embodiments illustrate the case where the coating material is applied only to one side of the coated substrate. However, the present disclosure is not limited thereto, and the coating material may also be applied to both sides of the coated substrate. In this case, the first heat source and the second heat source may be provided on both sides of the coated substrate. In addition, the embodiments may be combined to form additional embodiments.

Claims

1. An electrode manufacturing system, comprising: a coating unit (30) that coats a coating material (6) on a coating substrate (5) moving along a path; and a drying unit (40) that dries the coating material (6), the drying unit (40) includes at least one linear infrared lamp (44, 44a, 44b), and the infrared lamp (44, 44a, 44b) irradiates infrared rays onto the coating substrate; both ends of at least one of the infrared lamps (44, 44a, 44b) are arranged to be vertically aligned with two edges of the coating material.

2. The electrode manufacturing system according to claim 1, wherein the separation distance between the infrared lamp (44, 44a, 44b) and the coating material is 5 cm to 10 cm.

3. The electrode manufacturing system according to claim 1, wherein the infrared lamp (44, 44a, 44b) is arranged to be rotatable about a rotation axis formed in a direction orthogonal to the surface direction of the coating substrate (5).

4. The electrode manufacturing system according to claim 3, wherein the rotation axis is provided at the center in the length direction of the infrared lamp (44, 44a, 44b).

5. The electrode manufacturing system according to claim 4, wherein the infrared lamp (44, 44a, 44b) is arranged along an inclined line direction inclined with respect to the width direction of the coating material (6) or is arranged parallel to the width direction of the coating material (6).

6. The electrode manufacturing system according to claim 3, wherein the infrared lamp (44, 44a, 44b) includes: a first lamp (44a) that rotates about a first rotation axis; and a second lamp (44b) that rotates about a second rotation axis, the first rotation axis and the second rotation axis are provided on a straight line parallel to the width direction of the coating material (6).

7. The electrode manufacturing system according to claim 6, wherein the first rotation axis is formed at one end of the first lamp (44a), and the second rotation axis is formed at the other end of the second lamp (44b), the other end of the first lamp (44a) and one end of the second lamp (44b) are respectively located at two edges of the coating material (6).

8. The electrode manufacturing system according to claim 6, wherein the first lamp (44a) and the second lamp (44b) are arranged in a V shape or in a straight line.

9. The electrode manufacturing system according to claim 1, wherein the drying unit (40) further includes a hot air supply device (42), and the hot air supply device supplies hot air to the coating material (6).

10. The electrode manufacturing system according to claim 9, wherein the hot air supply device (42) includes a plurality of hot air supply nozzles (43), and the hot air supply nozzles (43) spray the hot air onto the coating material, in the drying unit (40), the plurality of hot air supply nozzles (43) and the plurality of infrared lamps (44, 44a, 44b) are alternately arranged along the moving direction of the coating substrate.

11. The electrode manufacturing system according to any one of claims 1 to 9, wherein, The coating material (6) is a positive electrode active material or a negative electrode active material, and / or the coating substrate (5) is a secondary battery electrode substrate, and the coating substrate (5) includes an aluminum sheet or a copper sheet.

12. Use of an electrode manufacturing system according to any one of claims 1 to 11 for manufacturing a secondary battery electrode.

13. A method for manufacturing an electrode, the electrode being a secondary battery electrode, the method comprising the steps of: Coating a coating material (6) on a coating substrate (5) moving along a path; and Drying the coating material (6) coated on the coating substrate (5), The drying step includes drying by at least one linear infrared lamp (44, 44a, 44b), and at least one of the linear infrared lamps (44, 44a, 44b) irradiates infrared rays on the coating material. Both ends of at least one of the linear infrared lamps (44, 44a, 44b) are aligned with two edges of the coating material.

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