Electrode rolling system

Abstract

An electrode rolling system according to one embodiment of the present invention may include a rolling apparatus configured to roll electrodes, a temperature control device configured to heat or cool the rolling apparatus, a temperature sensor configured to measure the temperature of the rolling apparatus, and a control device configured to control the temperature control device according to the temperature of the rolling apparatus measured by the temperature sensor.

Description

Technical Field

[0001] The present invention relates to an electrode rolling system.

[0002] This application claims priority based on Korean Patent Application No. 10-2023-0071085 filed on June 1, 2023, and all the contents disclosed in the specification and drawings of the application are incorporated into this application.

[0003] This application claims priority based on Korean Patent Application No. 10-2024-0071095 filed on May 30, 2024, and all the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0004] When performing hot rolling of an electrode, a rolling roll can be used. When performing hot rolling of an electrode using such a rolling roll, if the surface temperature of the rolling roll decreases due to heat loss, there may be a result that the electrode cannot be efficiently pressed.

[0005] In particular, when temperature loss of the rolling roll occurs, it is not always the case that temperature loss occurs uniformly over the entire surface of the rolling roll. In this case, it is difficult to uniformly transmit pressure over the entire width direction of the electrode. Such non-uniformity of the pressure applied to each part of the electrode during rolling may exacerbate the occurrence of undulation of the electrode.

[0006] In addition, the temperature loss of the roll used for rolling may cause a shrinkage phenomenon of the roll, and such a shrinkage phenomenon of the roll may result in the thickness of the rolled electrode being larger than the reference value.

[0007] Therefore, controlling the surface temperature of the rolling rolls used in electrode rolling is essential for ensuring process efficiency. However, if the temperature of the rolling rolls is kept excessively high in order to maintain a sufficiently high surface temperature, wrinkles may actually occur in the plain areas of the electrodes during the electrode rolling process due to the excessively high rolling temperature.

[0008] Therefore, there is a need to establish a method for appropriately controlling the surface temperature of the rolling rolls used in such electrode rolling and for preventing malfunctions caused by temperature loss of the rolling rolls. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] This invention was made in consideration of the above-mentioned problems, and one of its objectives is to enable appropriate control of the temperature of the rolling rolls used in rolling electrodes.

[0010] In another embodiment, one objective of the present invention is to minimize temperature loss on the rolling roll surface due to high-speed movement of electrodes during hot rolling.

[0011] However, the technical problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0012] An electrode rolling system according to one embodiment of the present invention for solving the above problems may include: a rolling apparatus configured to roll an electrode; a temperature control device configured to heat or cool the rolling apparatus; a temperature sensor configured to measure the temperature of the rolling apparatus; and a control device configured to control the temperature control device according to the temperature of the rolling apparatus measured by the temperature sensor.

[0013] The rolling apparatus may include a pair of rolling rolls.

[0014] The temperature control device is configured to circulate a fluid to regulate the temperature of the rolling mill, and may be configured to regulate the temperature of the circulating fluid in accordance with measured information regarding the temperature of the rolling mill.

[0015] The fluid may be oil.

[0016] The temperature control device may include a heating element built into the rolling mill.

[0017] The temperature control device may include a heating section configured to raise the temperature of the rolling mill and a cooling section configured to lower the temperature of the rolling mill.

[0018] The temperature sensor may be configured to measure the surface temperature of the rolling mill.

[0019] The control device can control the temperature control device to cool the rolling mill if the temperature of the rolling mill measured by the temperature sensor exceeds a reference value, and to heat the rolling mill if the temperature of the rolling mill measured by the temperature sensor is below a reference value.

[0020] The electrode rolling system may include a preheating device configured to preheat the electrodes before they are rolled by the rolling mill.

[0021] The preheating device may be configured to preheat the electrodes using a NIR heating method.

[0022] The rolling apparatus may be a secondary rolling apparatus configured to perform secondary rolling after the primary rolling performed on the electrode by the primary rolling apparatus is completed.

[0023] The electrode rolling system can include a preheating device configured to preheat the electrode before the electrode is rolled by the rolling device. In this case, the preheating device can be configured to preheat the electrode after the rolling by the primary rolling device is completed and before the rolling by the secondary rolling device is performed.

Advantages of the Invention

[0024] According to one aspect of the present invention, the temperature of the rolling roll used for rolling the electrode can be appropriately controlled.

[0025] According to another aspect of the present invention, when performing hot rolling, the temperature loss on the surface of the rolling roll due to the high-speed running of the electrode can be minimized.

[0026] However, the advantageous effects derived from the present invention are not limited to the above-mentioned effects, and other advantageous effects not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0027] The following drawings attached to this specification illustrate desirable embodiments of the present invention and serve to further understand the technical idea of the present invention together with the detailed description of the invention. Therefore, the present invention should not be construed as being limited only to the matters described in the drawings.

Brief Description of the Drawings

[0028] [Figure 1] It is a diagram showing an electrode rolling system according to an embodiment of the present invention. [Figure 2] It is a diagram showing a temperature adjustment device for adjusting the temperature of a rolling device according to one aspect of the present invention. [Figure 3] It is a diagram showing that the density of the flow path is formed differently depending on the position in a rolling device according to one aspect of the present invention. [Figure 4] It is a diagram showing a structure in which a heating wire is provided in a rolling device according to one aspect of the present invention. [Figure 5] It is a diagram showing an embodiment in which a temperature adjustment device according to one aspect of the present invention has a heating part and a cooling part. [Figure 6] This figure shows an embodiment of the present invention in which a temperature sensor is configured to measure the temperature of a rolling mill in a non-contact manner. [Figure 7] This is a diagram showing an electrode rolling system equipped with a preheating device. [Figure 8] This diagram shows an electrode rolling system equipped with a primary rolling mill and a secondary rolling mill. [Figure 9] This diagram shows an electrode rolling system configured to preheat after primary rolling and before secondary rolling. [Modes for carrying out the invention]

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims are not to be interpreted in their usual and dictionary sense, but rather in accordance with the technical ideas of the present invention, in accordance with the principle that the inventor himself may appropriately define the concepts of terms in order to best describe the invention. Therefore, it should be understood that the configurations shown in the embodiments described herein represent only one of the most preferred embodiments of the present invention and do not represent the entirety of the technical ideas of the present invention, and that there may be a variety of equivalents and modifications that can be substituted for them at the time of this application.

[0030] First, an electrode rolling system according to one embodiment of the present invention will be described with reference to Figure 1. Figure 1 is a diagram showing an electrode rolling system according to one embodiment of the present invention.

[0031] Referring to Figure 1, an electrode rolling system according to one embodiment of the present invention may include a rolling apparatus 10, a temperature control device 20, a temperature sensor 30, and a control device 40.

[0032] The rolling mill 10 may be configured to roll the electrode E. The rolling mill 10 may include, for example, a pair of rolling rolls 11. The temperature control device 20 may be configured to heat or cool the rolling mill 10. The temperature sensor 30 may be configured to measure the temperature of the rolling mill 10. The control device 40 may be configured to control the temperature control device 20 according to the temperature of the rolling mill 10 measured by the temperature sensor 30.

[0033] An electrode rolling system according to one aspect of the present invention may be configured to measure the temperature of the rolling apparatus 10 during the rolling of the electrode E and to control the heating and / or cooling operation of the temperature control device 20 by referring to the measured temperature. This allows the electrode rolling system according to one aspect of the present invention to adjust the temperature of the rolling apparatus 10 so that the temperature of the rolling apparatus 10 does not deviate from the appropriate temperature range required for rolling the electrode E during the rolling of the electrode E.

[0034] When performing hot rolling, if the temperature of the rolling roll 11 drops below the reference temperature, the linear pressure applied to the electrode E may increase, which may cause more severe waviness to occur in the electrode E. Also, if the rolling temperature is insufficient, shrinkage of the rolling roll 11 may occur, which may cause the thickness of the electrode E after rolling to exceed the target thickness. Conversely, when performing hot rolling, if the rolling temperature exceeds the reference temperature, heat damage to the electrode E may occur. If the rolling temperature is excessively high, for example, wrinkles may occur in the plain parts of the electrode E, which may prevent the rolling process from continuing.

[0035] An electrode rolling system according to one aspect of the present invention is configured to automatically control the rolling temperature, taking these problems into consideration. This prevents the rolling temperature of electrode E from being too low, which would prevent efficient rolling, or from being too high, which would damage electrode E.

[0036] On the other hand, an electrode E rolled by an electrode rolling system according to one embodiment of the present invention may be an electrode for a secondary battery. The electrode E may include an electrode current collector and an electrode active material layer coated on one or both sides of the electrode current collector. The electrode E may be transported in one direction. The electrode E may be transported along the direction of the arrow shown in Figure 1. The electrode E may be rolled as it passes between a pair of rolling rolls 11, and its thickness may decrease.

[0037] Next, with reference to Figure 1 and Figure 2, a temperature control device 20 according to one embodiment of the present invention will be described. Figure 2 is a diagram showing a temperature control device for adjusting the temperature of a rolling mill according to one embodiment of the present invention.

[0038] Referring to Figures 1 and 2, a temperature control device 20 in one embodiment of the present invention may be configured to regulate the temperature of the rolling mill 10 by circulating a fluid. The temperature control device 20 may be configured to regulate the temperature of the circulating fluid in accordance with information regarding the temperature of the rolling mill 10 measured by a temperature sensor 30.

[0039] Thus, an electrode rolling system according to one aspect of the present invention may include a temperature control device 20 configured to adjust the temperature of the rolling apparatus 10, thereby enabling the rolling temperature to be appropriately maintained and improving the quality of the rolling.

[0040] The temperature control device 20 may include a flow path P for fluid circulation. The flow path P may be configured to pass through the inside of the rolling roll 11. The fluid passing through the flow path P may be, for example, oil. However, the present invention is not limited thereto, and water, gas, etc., can be used as the fluid applied for temperature control. The flow path P may be in contact with the inner surface of the rolling roll 11. This allows the outer circumference of the rolling roll 11 to be heated or cooled by heat conduction depending on the temperature of the fluid flowing through the flow path P. The temperature control device 20 may have a chamber for supplying fluid to the flow path P. The fluid heated or cooled in the chamber or in a separately provided device can pass through the inside of the rolling roll 11 through the flow path P and then flow back into the chamber.

[0041] The temperature control device 20 may include a fluid heating device configured to heat a fluid for temperature control. The temperature control device 20 may include a valve configured to allow or block the circulation of fluid through part or all of the flow path P. The operation of the temperature control device 20 is controlled by the control device 40, thereby maintaining the temperature of the rolling mill 10 within a range suitable for rolling.

[0042] In the drawings of the present invention, a structure is shown in which only the rolling roll 11, positioned on one surface of the electrode E, is connected to the temperature control device 20. However, this is for illustrative purposes only, and the temperature control device 20 may be connected to both of the pair of rolling rolls 11.

[0043] Next, with reference to Figures 1 and 2, and Figure 3, a structure in which the flow path P is formed with different densities depending on the position inside the rolling roll 11 will be described. Figure 3 is a diagram showing that the density of the flow path is formed differently depending on the position in a rolling apparatus according to one embodiment of the present invention.

[0044] Referring to Figures 1 to 3, the density of the flow channels P in the regions adjacent to both ends (region A) in the direction of rotation axis (parallel to the Y axis) of the rolling roll 11 may be higher than the density of the flow channels in the region adjacent to the center (region B).

[0045] In this case, when hot rolling is performed, more heat can be transferred to the edges (region A) of the rolling roll 11, where the heat loss rate is relatively high. By transferring a larger amount of heat to the region with relatively high heat loss (region A), the temperature deviation across the entire surface area of ​​the rolling roll 11 in contact with the electrode E can be reduced. This results in the effect of forming a constant thickness across the entire surface area of ​​the electrode E along the rotation axis of the rolling roll 11.

[0046] Next, with reference to Figures 1 and 3, and Figure 4, an embodiment in which a heating wire L is arranged in a temperature control device 20 according to one embodiment of the present invention will be described. Figure 4 is a diagram showing a structure in which a heating wire is provided in a rolling mill according to one embodiment of the present invention.

[0047] Referring to Figures 1, 3, and 4, the temperature control device 20 may include a heating element L built into the rolling mill 10. In this case, the amount of current flowing through the heating element L can be adjusted by the control device 40, thereby maintaining the temperature of the rolling mill 10 within a range suitable for rolling.

[0048] On the other hand, although not shown in the diagram, as explained with reference to Figure 3 above, the density of the heating wires L in the regions adjacent to both ends in the rotation axis direction of the rolling roll 11 (region A) may be higher than the density of the heating wires in the region adjacent to the center (region B).

[0049] In this case, when hot rolling is performed, more heat can be transferred to the edges (region A) of the rolling roll 11, where the heat loss rate is relatively high. By transferring a larger amount of heat to the region with relatively high heat loss (region A), the temperature deviation across the entire surface area of ​​the rolling roll 11 in contact with the electrode E can be reduced. This results in the effect of forming a constant thickness across the entire surface area of ​​the electrode E along the rotation axis of the rolling roll 11.

[0050] Next, an exemplary embodiment of a temperature control device 20 according to one aspect of the present invention will be described with reference to Figure 1 and Figure 5. Figure 5 is a diagram showing an embodiment of a temperature control device according to one aspect of the present invention having a heating section and a cooling section.

[0051] Referring to Figures 1 and 5, the temperature control device 20 may include a heating section and a cooling section. The heating section may be configured to raise the temperature of the rolling mill 10. The cooling section may be configured to lower the temperature of the rolling mill 10.

[0052] Thus, when the temperature control device 20 is configured to have both a heating section and a cooling section, efficient rolling can be performed by rapid temperature adjustment when the surface temperature of the rolling roll 11 has not reached the appropriate temperature for rolling the electrode E, or when it exceeds the appropriate temperature. If the temperature control device 20 has only a heating section for raising the temperature of the rolling roll 11, heat loss occurs in the rolling roll 11 and when the rolling temperature drops below the reference temperature, a rapid response is possible by the operation of the heating section. However, when the rolling temperature exceeds the reference temperature, it becomes difficult to perform rapid temperature adjustment. In other words, even if the operation of the heating section is interrupted to lower the temperature of the rolling roll 11, it takes time for the temperature of the rolling roll 11 to drop naturally, so rapid temperature adjustment may be difficult.

[0053] The heating unit may be configured, for example, to heat the fluid so that its temperature is higher than the temperature of the rolling roll 11, and then use the heated fluid to heat the rolling roll 11. Alternatively, the heating unit may be configured, for example, to heat the rolling roll 11 using an electric heating wire. However, the present invention is not limited thereto, and various forms of heating units configured to raise the temperature of the rolling roll 11 can be applied.

[0054] The cooling unit may be configured, for example, to cool the fluid so that its temperature is lower than the temperature of the rolling roll 11, and then to use the cooled fluid to cool the rolling roll 11. However, the present invention is not limited thereto, and various forms of cooling units configured to lower the temperature of the rolling roll 11 can be applied.

[0055] Next, with reference to Figure 1 and Figure 6, an exemplary embodiment of the temperature sensor 30 of one aspect of the present invention will be described. Figure 6 shows an embodiment in which the temperature sensor of one aspect of the present invention is configured to measure the temperature of a rolling mill in a non-contact manner.

[0056] Referring to Figures 1 and 6, the temperature sensor 30 may be configured to measure the surface temperature of the rolling roll 11. The temperature sensor 30 may be configured to measure the temperature of the outer circumference of the rolling roll 11 connected to the electrode E.

[0057] For efficient rolling, it is necessary to maintain the surface temperature of the rolling roll 11, which is in direct contact with the electrode E during rolling, within an appropriate range. From a productivity standpoint, it is necessary to maintain the transfer speed of the electrode E above a certain level within the system for manufacturing the electrode E. However, when performing hot rolling, the higher the transfer speed of the electrode E, the faster heat loss on the surface of the rolling roll 11 may occur. Therefore, by directly measuring the surface temperature of the rolling roll 11 and using this as a reference to quickly compensate for heat loss on the surface of the rolling roll 11, the quality of rolling can be improved.

[0058] The temperature sensor 30 may be configured, for example, to measure the surface temperature of the rolling roll 11 in a non-contact manner. The temperature sensor 30 may be configured to provide information regarding the measured surface temperature of the rolling roll 11 to the control device 40.

[0059] On the other hand, the drawings of the present invention only show the case in which the temperature sensor 30 is provided at a position corresponding to one of the pair of rolling rolls 11, but the present invention is not limited thereto. That is, the temperature sensor 30 in one embodiment of the present invention may be configured to measure the temperature of both of the pair of rolling rolls 11. For example, at least one pair of temperature sensors 30 may be provided, and each of the pair of temperature sensors 30 may be configured to measure the temperature of each of the pair of rolling rolls 11.

[0060] Next, with reference to Figure 1, a control device 40 according to one embodiment of the present invention will be described in more detail.

[0061] Referring to Figure 1, the control device 40 can control the temperature control device to cool the rolling mill 10 if the temperature of the rolling mill 10 measured by the temperature sensor 30 exceeds a reference value, and to heat the rolling mill if the temperature of the rolling mill 10 measured by the temperature sensor 30 is below a reference value.

[0062] Thus, in one embodiment of the present invention, the electrode rolling system includes a control device 40 that controls the temperature adjustment of the rolling rolls 11 by the temperature control device 20 according to the temperature of the rolling apparatus 10 measured by the temperature sensor 30, thereby enabling the continuous maintenance of an appropriate rolling temperature.

[0063] Cooling of the rolling mill 10 may mean active cooling, such as circulating a fluid at a temperature lower than the measured temperature when the temperature of the rolling rolls 11 is measured to be higher than the appropriate reference temperature range for rolling, or it may mean passive cooling, such as lowering the temperature of the rolling rolls 11 by not heating them. Heating of the rolling mill 10 may mean heating using fluid circulation as described above, and / or heating using electric heating wires.

[0064] The control device 40 in one aspect of the present invention does not necessarily refer to a component physically separated from the temperature control device 20. That is, the temperature control device 20 and the control device 40 in one aspect of the present invention can also be provided as a single integrated device.

[0065] Next, with reference to Figure 1 and Figure 7, a preheating device 50 according to one embodiment of the present invention will be described. Figure 7 is a diagram showing an electrode rolling system equipped with a preheating device.

[0066] Referring to Figures 1 and 7, an electrode rolling system according to one aspect of the present invention may include a preheating device 50. The preheating device 50 may be configured to preheat the electrode E before it is rolled by the rolling mill 10.

[0067] When rolling is performed after preheating the electrode E with the preheating device 50, it is possible to prevent the surface temperature of the rolling roll 11 from dropping sharply as rolling progresses. Preheating the electrode E raises its temperature, thereby minimizing the temperature difference between the surface of the rolling roll 11 and the electrode E. This minimizes the heat loss generated on the surface of the rolling roll 11 when the electrode E comes into contact with the rolling roll 11. Furthermore, by minimizing heat loss on the surface of the rolling roll 11 during the rolling process, it becomes easier to control the temperature of the rolling roll 11 using the temperature control device 20.

[0068] The preheating device 50 may be configured to heat the electrode E by, for example, NIR (Near IR) heating. For example, the preheating device 50 may be an NIR oven.

[0069] In the drawings of the present invention, the preheating device 50 is shown to be located on only one side of the electrode E, but the present invention is not limited thereto. The preheating device 50 may be provided on both sides of the electrode E.

[0070] Next, with reference to Figure 8, an electrode rolling system according to one embodiment of the present invention, configured to perform multiple rolling operations, will be described. Figure 8 is a diagram showing an electrode rolling system comprising a primary rolling apparatus and a secondary rolling apparatus.

[0071] Referring to Figure 8, one embodiment of the present invention's electrode rolling system can include a primary rolling mill 60 and a secondary rolling mill 10. That is, the rolling mill 10 described with reference to Figure 1 may be a secondary rolling mill 10 configured to perform secondary rolling after primary rolling is completed. Temperature control by the temperature control device 20, temperature sensor 30, and control device 40 of one embodiment of the present invention can be performed only on the secondary rolling mill 10. Of course, both the primary rolling mill 60 and the secondary rolling mill 10 can be configured to maintain the surface temperature of the rolling rolls 61 and 11 within a certain range. However, from the viewpoint of process efficiency, if temperature control is required for only one of the rolling mills, it is more advantageous to perform temperature control on the secondary rolling mill 10.

[0072] The thickness of electrode E may decrease sequentially as primary and secondary rolling are performed. In this case, controlling the process conditions during secondary rolling may be even more difficult than controlling them during primary rolling. Therefore, it may be desirable to control the surface temperature of the rolling rolls 11 of the secondary rolling apparatus 10 in order to control the process conditions during secondary rolling.

[0073] Next, with reference to Figure 8 and Figure 9, the timing of preheating will be described when an electrode rolling system according to one embodiment of the present invention is configured to perform primary rolling and secondary rolling. Figure 9 shows an electrode rolling system configured to perform preheating after primary rolling and before secondary rolling.

[0074] Referring to Figure 9 along with Figure 8, one embodiment of the present invention may be configured to preheat the electrode E after rolling by the primary rolling mill 60 is completed and before rolling by the secondary rolling mill 10 is performed.

[0075] In this case, the quality of the rolling can be improved through two rolling processes. Furthermore, in this case, the temperature loss rate of the rolling rolls 11 of the secondary rolling mill 10 can be reduced, thereby further improving the quality of the rolling.

[0076] The drawings of the present invention only show an electrode rolling system configured such that preheating is performed after rolling by the primary rolling mill 60 and before rolling by the secondary rolling mill 10, but the present invention is not limited thereto. That is, the preheating device 50 in one embodiment of the present invention can also be configured to perform preheating both before primary rolling and before secondary rolling. However, if the preheating process is to be applied only once, considering the efficiency of the process, it may be advantageous to perform preheating after primary rolling is completed and before secondary rolling. This is because controlling the process conditions of secondary rolling can be even more difficult than controlling the process conditions of primary rolling.

[0077] On the other hand, although the temperature control device 20, temperature sensor 30, and control device 40 are not shown in Figure 9 of the present invention, these components can be used to adjust the temperature of the secondary rolling mill 10, and further, they can also be used to adjust the temperature of the primary rolling mill 60.

[0078] Although the present invention has been described above with reference to limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and various modifications and variations are possible within the equivalent scope of the technical idea of ​​the present invention and the claims described below by persons with ordinary skill in the art to which the present invention pertains. [Explanation of Symbols]

[0079] E: Electrode 10: Rolling mill (primary rolling mill) 11: Rolling Rolls 20: Temperature control device P: Flow channel L: Heating wire 30: Temperature sensor 40: Control device 50: Preheating device 60: Rolling mill (secondary rolling mill) 61: Rolling Roll

Claims

1. A rolling apparatus configured to roll electrodes, A temperature control device configured to heat or cool the rolling mill, A temperature sensor configured to measure the temperature of the rolling mill, A control device configured to control the temperature control device according to the temperature of the rolling mill measured by the temperature sensor, An electrode rolling system, including one.

2. The rolling apparatus is The electrode rolling system according to claim 1, comprising a pair of rolling rolls.

3. The temperature control device is An electrode rolling system according to claim 1 or 2, configured to circulate a fluid to regulate the temperature of the rolling mill, and configured to adjust the temperature of the circulating fluid in accordance with measured information regarding the temperature of the rolling mill.

4. The electrode rolling system according to claim 3, wherein the fluid is oil.

5. The temperature control device is The electrode rolling system according to claim 1 or 2, further comprising an electric heating wire built into the rolling apparatus.

6. The temperature control device is A heating unit configured to raise the temperature of the rolling mill, A cooling unit configured to lower the temperature of the rolling mill, An electrode rolling system according to claim 1 or 2, comprising:

7. The aforementioned temperature sensor is The electrode rolling system according to claim 1 or 2, configured to measure the surface temperature of the rolling apparatus.

8. The control device is The electrode rolling system according to claim 1 or 2, wherein the temperature control device is controlled to cool the rolling mill when the temperature of the rolling mill measured by the temperature sensor exceeds a reference value, and to heat the rolling mill when the temperature of the rolling mill measured by the temperature sensor is below a reference value.

9. The electrode rolling system is The electrode rolling system according to claim 1 or 2, further comprising a preheating device configured to preheat the electrode before it is rolled by the rolling mill.

10. The preheating device is The electrode rolling system according to claim 9, configured to preheat the electrode by a near-infrared heating method.

11. The rolling apparatus is The electrode rolling system according to claim 1 or 2, wherein the secondary rolling apparatus is configured to perform secondary rolling after primary rolling performed on the electrode by a primary rolling apparatus is completed.

12. The electrode rolling system is The device includes a preheating device configured to preheat the electrode before it is rolled by the rolling mill, The preheating device is The electrode rolling system according to claim 11, wherein the electrodes are preheated after rolling by the primary rolling device is completed and before rolling by the secondary rolling device is performed.

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