Electrode production apparatus and battery cell comprising electrodes produced thereby, and battery pack and vehicle comprising battery cells

Abstract

An electrode production device, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and an automobile are disclosed. An electrode production device according to one embodiment of the present invention is an electrode production device that produces an electrode by transporting an electrode foil having a coating layer retaining portion and a non-coating layer uncoated portion formed thereon, the electrode production device comprising: a transport unit for transporting the electrode foil; a retaining portion pressurizing unit for pressurizing the retaining portion of the electrode foil transported by the transport unit; and a non-coating portion pressurizing unit spaced apart from the retaining portion pressurizing unit and pressurizing the non-coating portion, wherein the non-coating portion pressurizing unit is provided with a heat supply member for supplying heat to the non-coating portion.

Description

Technology Field

[0001] The present invention relates to an electrode production device, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and an automobile. More specifically, the invention relates to an electrode production device capable of improving electrode quality, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and an automobile. Background Technology

[0002] Generally, a secondary battery refers to a battery capable of repeated charging and discharging, such as lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries.

[0003] Secondary batteries can be classified according to the shape of the battery case into cylindrical batteries and prismatic batteries in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries in which the electrode assembly is embedded in a pouch-type case made of aluminum laminate sheet.

[0004] Such secondary batteries can be manufactured by housing an electrode assembly comprising a positive electrode and a negative electrode stacked with a separator in between, an electrolyte material, in a case of various shapes, and sealing the case.

[0005] The electrode (positive or negative electrode) of a secondary battery may include a retaining portion in which a coating layer is formed by pressing an electrode composite onto the surface of an electrode foil, and a non-retaining portion in which the coating layer is not formed.

[0006] Furthermore, the electrodes of a secondary battery can be produced through a roll-to-roll process in which an electrode foil with a coating layer formed on its surface is wound and moved between rolls. In this process, the electrode foil is rolled by a rolling roll as it moves through the rolls. However, since the rolling roll presses the holding portion but does not come into contact with the unholding portion, a difference in elongation occurs between the holding portion and the unholding portion. Consequently, wrinkles or ripples may form on the unholding portion, leading to a problem where the quality of the electrode deteriorates. The problem to be solved

[0007] Accordingly, the technical problem to be solved by the present invention is to provide an electrode production apparatus capable of improving electrode quality by minimizing the difference in elongation between the retaining portion and the non-retaining portion of an electrode foil, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and an automobile.

[0008] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below. means of solving the problem

[0009] According to one aspect of the present invention, an electrode production apparatus for producing an electrode by transporting an electrode foil having a retaining portion of a coating layer and a non-coating portion formed thereon, the apparatus comprises: a transport unit for transporting the electrode foil; a retaining portion pressurizing unit for pressurizing the retaining portion of the electrode foil transported by the transport unit; and a non-coating portion pressurizing unit spaced apart from the retaining portion pressurizing unit and pressurizing the non-coating portion, wherein the non-coating portion pressurizing unit is provided with a heat supply member for supplying heat to the non-coating portion.

[0010] In one embodiment, the non-pressure unit comprises a rotating roller that rotates in contact with the electrode foil; and at least one protrusion protruding from the rotating roller, and the heat supply member may be mounted on the inner side of the protrusion.

[0011] In one embodiment, the heat supply member may include a heater part installed inside the protrusion; a power supply line connected to the heater part; and a power source that supplies power to the heater part through the power supply line.

[0012] In one embodiment, the heater portion is provided in a plurality, and the plurality of heater portions may be arranged along the circumference of the protrusion.

[0013] In one embodiment, the device may include a temperature sensor for measuring the temperature inside the protrusion; and a control unit for controlling the operation of the heater unit based on the temperature inside the protrusion measured by the temperature sensor.

[0014] In one embodiment, the rotating roller has a non-protrusion on the side of the protrusion, and a cooling member may be provided on the inner side of the non-protrusion.

[0015] In one embodiment, the rotating roller may include a rotating body having a space formed therein; and a rotating shaft extending integrally from the rotating body and rotating together with the rotating body.

[0016] In one embodiment, the device further includes a fixing member that penetrates the rotating roller through the rotating shaft and is fixed to the outside, and a bearing may be mounted between the fixing member and the rotating shaft.

[0017] In one embodiment, the power supply line may be installed on the inside of the fixed member.

[0018] In one embodiment, the cooling member may include: a spray nozzle that sprays a cooling fluid into the non-protruding portion; a connecting passage connected to the spray nozzle; and a fluid supply source connected to the connecting passage to supply fluid.

[0019] In one embodiment, the fluid may be air or water.

[0020] In one embodiment, a blocking partition may be formed between the protrusion and the non-protrusion to block heat supplied to the protrusion from moving to the non-protrusion.

[0021] In one embodiment, the blocking partition may be formed of a material having lower thermal conductivity than the rotating roller.

[0022] In one embodiment, the maintaining pressure unit may include a pressure roller.

[0023] Meanwhile, according to another aspect of the present invention, a battery cell comprising an electrode produced using the aforementioned electrode production device may be provided, a battery pack comprising at least one of the aforementioned battery cells may be provided, and a vehicle comprising at least one of the aforementioned battery cells may be provided. Effects of the invention

[0024] The embodiments of the present invention have the effect of improving electrode quality by minimizing the difference in elongation between the retaining portion and the unretained portion of the electrode foil.

[0025] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by those skilled in the art from the description of the invention below. Brief explanation of the drawing

[0026] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic perspective view of an electrode production device according to one embodiment of the present invention. FIG. 2 is a schematic perspective view of a non-pressurized unit in an electrode production device according to one embodiment of the present invention. FIG. 3 is a cross-sectional view of a non-pressurized unit in an electrode production device according to one embodiment of the present invention. Figure 4 is a cross-sectional view taken along A-A' of Figure 2. Figure 5 is a drawing illustrating a modified embodiment of Figure 4. Figure 6 is a cross-sectional view taken along B-B' of Figure 2. FIG. 7 is a schematic diagram showing the configuration of a battery pack including a battery cell equipped with an electrode produced using an electrode production device according to each embodiment of the present invention. Figure 8 is a drawing for explaining a vehicle including the battery pack of Figure 7. Specific details for implementing the invention

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all aspects of the technical spirit of the present invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.

[0028] In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically depicted for convenience and clarity of explanation. Accordingly, the size of each component does not entirely reflect its actual size. If it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such description shall be omitted.

[0029] As used in this specification, the terms "combination" or "connection" include not only cases where one member and another member are directly joined or directly connected, but also cases where one member is indirectly joined or indirectly connected to another member through a connecting member.

[0030] FIG. 1 is a schematic perspective view of an electrode production device according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of a non-pressure unit in an electrode production device according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a non-pressure unit in an electrode production device according to an embodiment of the present invention, FIG. 4 is a cross-sectional view taken along A-A' of FIG. 2, FIG. 5 is a drawing showing a modified embodiment of FIG. 4, and FIG. 6 is a cross-sectional view taken along B-B' of FIG. 2.

[0031] Referring to FIG. 1, an electrode production device (10) according to one embodiment of the present invention relates to a device for producing an electrode (anode or a cathode) by transporting an electrode foil (900) having a coating layer (910) formed thereon. The concept of an electrode includes both wet electrodes and dry electrodes.

[0032] For example, a wet electrode is manufactured by applying an electrode mixture in the form of a slurry containing a solvent to the surface of an electrode substrate, such as an electrode foil (900), to form a coating layer (910), and drying the coating layer (910).

[0033] And, the dry electrode is manufactured through a process of forming a coating layer (910) by pressing an electrode mixture in the form of a powder (powder mixture) that does not contain a solvent onto the surface of an electrode foil (900). That is, the electrode mixture is mixed without a liquid medium such as a solvent or a dispersion medium, and then manufactured by pressing the electrode mixture in the form of a powder while passing it through, for example, a rolling roll.

[0034] Here, the electrode foil (900) may include a retaining portion (920) on which a coating layer (910) of an active material is formed on the surface, and a non-retaining portion (930) on which the coating layer (910) of the active material is not formed.

[0035] Referring to FIG. 1, an electrode production device (10) according to one embodiment of the present invention includes a transfer unit (100), a holding pressure unit (200) (200), and a non-hold pressure unit (300).

[0036] The transfer unit (100) transfers the electrode foil (900) having a coating layer (910) formed thereon. The transfer unit (100) may be varied, for example, may include a plurality of transfer rollers (110) to transfer the electrode foil (900) in a roll-to-roll manner.

[0037] However, although the transfer unit (100) is not limited thereto, for convenience of explanation, an embodiment in which the transfer unit (100) includes a plurality of transfer rollers (110) will be described below. Also, in FIG. 1, the arrow indicates the transfer direction of the electrode foil (900).

[0038] The holding pressure unit (200) pressurizes the holding portion (920) of the electrode foil (900) being transported by the transport unit (100). The holding pressure unit (200) can be configured in various ways and, for example, may include a pressure roller (210), but is not limited thereto.

[0039] Referring to FIG. 1, a coating layer (910) of an active material is formed on the retaining portion (920) of the electrode foil (900), and since the coating layer (910) is not formed on the uncoated portion (930), the retaining portion (920) is thicker than the uncoated portion (930).

[0040] Here, if only the retaining portion (920) is pressurized by the retaining pressurizing unit (200), the unpressurized portion (930) may develop wrinkles or ripples or undergo deformation while being transported by the transport roller (110). To prevent the formation of such wrinkles or ripples or deformation of the unpressurized portion (930), the electrode production device (10) according to one embodiment of the present invention includes an unpressurized pressurizing unit (300). However, even if the unpressurized portion (930) is pressurized by the unpressurized pressurizing unit (300), a difference in elongation rate may occur between the retaining portion (930) and the unpressurized portion (930).

[0041] Accordingly, an electrode production device (10) according to one embodiment of the present invention includes a heat supply member (400) to minimize the difference in elongation rate between the retaining part (930) and the unretained part (930), and a detailed explanation thereof will be provided later.

[0042] The non-retaining pressure unit (300) is spaced apart from the retaining pressure unit (200) and pressurizes the non-retaining part (930).

[0043] Referring to FIG. 2, the non-pressure unit (300) may include a rotating roller (310) and a protrusion (312). Additionally, a non-protrusion (313) is formed on the side of the protrusion (312).

[0044] Referring to FIG. 1, the rotating roller (310) rotates in contact with the electrode foil (900). The way the rotating roller (310) rotates can vary. For example, it can rotate while coupled to a belt (316, see FIG. 3).

[0045] Referring to FIGS. 2 and FIGS. 3, the rotating roller (310) may include a rotating body (311) and a rotating shaft (315).

[0046] A space may be formed inside the rotating body (311). In addition, a heat supply member (400) and a cooling member (700), which will be described later, may be installed in the space inside the rotating body (311). The heat supply member (400) may be provided on the inside of the protrusion (312), and the cooling member (700) may be provided on the inside of the non-protrusion (313).

[0047] The rotation shaft (315) extends integrally from the rotating body (311) and rotates together with the rotating body (311). The rotation shaft (315) may be configured to rotate by being coupled to a belt (316). That is, for example, when the belt (316) wound around the rotation shaft (315) rotates, the rotation shaft (315) coupled to the belt (316) also rotates together. However, the rotation method of the rotation shaft (315) is not limited to this. The belt (316) may be connected to various driving sources, such as a motor, to rotate.

[0048] The rotating shaft (315) may have a hollow formed in the center, and may be configured so that the fixed member (600) passes through the rotating roller (310) through the hollow of the rotating shaft (315).

[0049] Referring to FIG. 3, the fixed member (600) passes through the rotating roller (310) via the rotating shaft (315) and is fixed to the outside. For example, as described above, since a hollow is formed in the rotating shaft (315), the fixed member (600) passes through the hollow of the rotating shaft (315) and the rotating body (311).

[0050] Here, the fixed member (600) can be coupled to and supported by a support (620) positioned on the outside of the rotating roller (310). Additionally, various types of bearings (610) can be coupled between the fixed member (600) and the rotating shaft (315). In this way, when the fixed member (600) passes through the rotating shaft (315) and the rotating body (311) and is coupled to and fixed by the support (620) on the outside of the rotating roller (310), the fixed member (600) does not rotate even if the rotating shaft (315) and the rotating body (311) rotate.

[0051] At this time, since a bearing (610) can be coupled between the fixed member (600) and the rotating shaft (315), friction between the rotating shaft (315) and the fixed member (600) is reduced.

[0052] And, referring again to FIG. 3, the power supply line (420) of the heat supply member (400) described later and the connecting channel (720) of the cooling member (700) can pass through between the fixed members (600). That is, the power supply line (420) of the heat supply member (400) and the connecting channel (720) of the cooling member (700) can be installed inside the fixed members (600). As a result, even if the rotating shaft (315) and the rotating body (311) rotate, the power supply line (420) and the connecting channel (720) do not rotate, so twisting or interference can be prevented.

[0053] One or more protrusions (312) are provided and formed to protrude from the rotating body (311) of the rotating roller (310). For example, one or more protrusions (312) may protrude from the rotating body (311) of the rotating roller (310) at a predetermined interval.

[0054] Additionally, the protrusion (312) may be formed integrally with the rotating body (311). However, the protrusion (312) does not necessarily have to be formed integrally with the rotating body (311), and the protrusion (312) may be detachably coupled to the rotating body (311).

[0055] Referring to FIG. 1, the protrusion (312) protrudes from the rotating body (311) of the rotating roller (310) so that it can come into contact with the unworn part (930) and also press the unworn part (930) of the electrode foil (900).

[0056] Referring to FIG. 3, a heat supply member (400) is provided in the non-removable part pressurization unit (300) to supply heat to the non-removable part (930). For example, the heat supply member (400) can be mounted on the inside of the protrusion (312).

[0057] The heat supply member (400) may include a heater part (410), a power supply line (420), and a power source (430).

[0058] The heater unit (410) can be installed inside the protrusion (312). The heater unit (410) can be installed in various directions. Also, the heater unit (410) can be installed in various numbers. For example, as shown in FIG. 4, one heater unit (410) can be installed facing downward relative to FIG. 4.

[0059] And, referring to FIG. 5 as a modified embodiment, three heater sections (410) may be installed facing left, right, and downward. However, this is only one embodiment, and the direction and number of heater sections (410) may vary. For example, a plurality of heater sections (410) may be provided and arranged along the circumference of the protrusion (312).

[0060] The heater unit (410) supplies heat to the internal space of the protrusion (312), thereby raising the temperature of the protrusion (312). As described above, the protrusion (312) contacts the bare portion (930) and presses the bare portion (930). Therefore, when the protrusion (312), whose temperature has been raised by the heater unit (410), presses the bare portion (930), the elongation rate of the bare portion (930) can be maximized by the heat. As a result, the difference in elongation rates between the retaining portion (920) and the bare portion (930) can be minimized.

[0061] Meanwhile, the heater unit (410) may be a wireless heater that operates wirelessly.

[0062] The power supply line (420) is connected to the heater unit (410) and transmits energy (e.g., electric energy) supplied from the power source (430) to the heater unit (410). The power supply line (420) includes various types of wires through which electricity flows.

[0063] The power supply line (420) is connected to the heater unit (410) through the fixed member (600), and since the fixed member (600) is fixed even when the rotating roller (310) rotates, the power supply line (420) does not rotate, and thus, the twisting of the power supply line (420) can be prevented.

[0064] The power supply source (430) supplies power to the heater unit (410) through the power supply line (420). The power supply source (430) can be various, for example, various batteries that supply electrical energy to the heater unit (410), but is not limited thereto.

[0065] The temperature sensor (500) is configured to measure the temperature inside the protrusion (312). The temperature sensor (500) may be coupled to the inside or outside of the protrusion (312). The temperature sensor (500) may be connected to the control unit (510) via a wire, but may also be controlled wirelessly by the control unit (510). When the temperature sensor (500) is connected to the control unit (510) via a wire, the temperature sensor (500) may be installed on the fixed member (600).

[0066] The control unit (510) controls the operation of the heater unit (410) based on the temperature inside the protrusion (312) measured by the temperature sensor (500). The temperature of the protrusion (312) at which the difference in elongation rate between the retaining unit (920) and the non-retaining unit (930) can be minimized may vary depending on the model of the battery cell (20). Here, the optimal temperature of the protrusion (312) for each model can be determined through experimentation.

[0067] Then, the optimal temperature of the protrusion (312) for each model is pre-entered into the control unit (510), and the control unit (510) compares the actual temperature of the protrusion (312) measured by the temperature sensor (500) with the optimal temperature entered into the control unit (510) and controls the operation of the heater unit (410) according to the result.

[0068] For example, if the actual temperature measured at the protrusion (312) is lower than the optimal temperature input to the control unit (510), the control unit (510) controls the heater unit (410) to increase the temperature, and if the actual temperature measured at the protrusion (312) is higher than the optimal temperature input to the control unit (510), the control unit (510) controls the heater unit (410) to decrease the temperature.

[0069] Referring to FIG. 3, a cooling member (700) can be installed on the non-protruding part (313) of the non-pressurized unit (300). The cooling member (700) prevents the temperature of the non-protruding part (313) from rising due to heat provided from the heat supply member (400) installed on the protruding part (312).

[0070] That is, the non-protruding portion (313) comes into contact with the retaining portion (920) of the electrode foil (900). When the temperature of the non-protruding portion (313) rises, the elongation rate of the retaining portion (920) increases, and as a result, the difference in elongation rate between the retaining portion (920) and the non-retaining portion (930) also increases.

[0071] Accordingly, the cooling member (700) prevents the temperature of the non-protruding part (313) from rising, thereby preventing an increase in the elongation rate of the retaining part (920). Additionally, the heat supply member (400) raises the temperature of the protruding part (312) to increase the elongation rate of the unsupported part (930), thereby minimizing the difference in elongation rates between the retaining part (920) and the unsupported part (930).

[0072] Referring to FIGS. 3 and FIGS. 6, the cooling member (700) includes a spray nozzle (710), a connecting channel (720), and a fluid supply source (730).

[0073] The spray nozzle (710) is mounted on the non-protruding part (313) of the non-pressurized unit (300) and sprays cooling fluid onto the non-protruding part (313). Then, the connecting passage (720) is connected to the spray nozzle (710) so that fluid supplied from the fluid supply source (730) moves to the spray nozzle (710).

[0074] And, the fluid supply source (730) is connected to the connecting channel (720) and supplies fluid to the injection nozzle (710) through the connecting channel (720). Here, the fluid may be air or water, but is not limited thereto. And, as described above, the connecting channel (720) of the cooling member (700) may pass between the fixed members (600).

[0075] Meanwhile, a blocking partition (800) may be formed between the protrusion (312) and the non-protrusion (313) to block heat supplied to the protrusion (312) from moving to the non-protrusion (313). Here, the blocking partition (800) may be formed of a material having lower thermal conductivity than the rotating roller (310).

[0076] The blocking partition (800) can be coupled to the rotating body (311) and can rotate together with the rotating body (311). Here, the blocking partition (800) can be spaced apart from the fixed member (600) by a preset distance (810, see enlarged portion of FIG. 3) so as not to interfere with the fixed member (600) when the blocking partition (800) rotates.

[0077] In an electrode production device (10) according to one embodiment of the present invention, heat supplied by a heat supply member (400) installed on a protrusion (312) raises the temperature of the protrusion (312), but does not raise the temperature of the non-protrusion (313) by means of a blocking partition (800).

[0078] However, even if there is a blocking partition (800), heat from the protrusion (312) can be transferred to the non-protrusion (313), and also, for example, as described above, heat can be transferred from the protrusion (312) to the non-protrusion (313) through the gap (810) formed between the blocking partition (800) and the fixing member (600). However, in this case, the cooling member (700) installed on the non-protrusion (313) can lower the temperature of the non-protrusion (313) to maintain a preset appropriate temperature.

[0079] By doing so, the difference in elongation between the retaining portion (920) and the unretained portion (930) of the electrode foil (900) can be minimized, and the electrode quality can also be improved.

[0080] FIG. 7 is a schematic diagram showing the configuration of a battery pack including a battery cell equipped with an electrode produced using an electrode production device according to each embodiment of the present invention.

[0081] Referring to FIG. 7, a battery pack (30) according to one embodiment of the present invention may include one or more battery cells (20). Here, the battery cell (20) includes an electrode produced using an electrode production device (10) according to each embodiment of the present invention as described above.

[0082] Additionally, the battery pack (30) may further include a pack housing (31) for housing a battery cell (20), and various devices for controlling the charging and discharging of the battery cell (20), such as a BMS, a current sensor, a fuse, etc.

[0083] Figure 8 is a drawing for explaining a vehicle including the battery pack of Figure 7.

[0084] Referring to FIG. 8, a vehicle (40) according to one embodiment of the present invention may include one or more battery cells (20) or battery packs (30) including electrodes produced using an electrode production device (10) according to each embodiment of the present invention. Here, the vehicle (40) includes various vehicles configured to use electricity, such as, for example, electric vehicles or hybrid vehicles.

[0085] In this specification, where terms indicating directions such as up, down, left, and right are used, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0086] Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims set forth below by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. That is, the scope of the true technical spirit of the present invention is indicated in the claims, and all variations within the equivalent scope thereof should be interpreted as being included in the present invention. Explanation of the symbols

[0087] 10: Electrode production device 100: Transfer unit 110: Transfer roller 200: Maintenance additional pressure unit 210: Pressure roller 300: Non-pressure unit 310: Rotating roller 311: Rotating body 312: Protrusion 313: Non-protrusion 315 : Rotation axis 400 : Heat supply member 410 : Heater unit 420 : Power supply line 430 : Power supply 500 : Temperature sensor 510 : Control unit 600 : Fixing member 610 : Bearing 700 : Cooling element 710 : Spray nozzle 720 : Connecting channel 730 : Fluid supply source 800 : Blocking bulkhead 900: Electrode foil 910: Coating layer 920 : Maintenance Unit 930 : Non-maintenance Unit 20 : Battery cell 30 : Battery pack 31 : Pack housing 40 : Car

Claims

Claim 1 An electrode production apparatus for producing an electrode by transporting an electrode foil having a retaining portion of a coating layer and a non-coating portion formed thereon, the apparatus comprises: a transport unit for transporting the electrode foil; a retaining portion pressurizing unit for pressurizing the retaining portion of the electrode foil transported by the transport unit; and a non-coating portion pressurizing unit spaced apart from the retaining portion pressurizing unit and pressurizing the non-coating portion, wherein the non-coating portion pressurizing unit is provided with a heat supply member for supplying heat to the non-coating portion, and the non-coating portion pressurizing unit comprises: a rotating roller that rotates in contact with the electrode foil; and at least one protrusion protruding from the rotating roller, wherein the heat supply member is mounted on the inner side of the protrusion, and the rotating roller comprises a rotating body having a space formed therein. An electrode production device comprising a rotating shaft that extends integrally from the rotating body and rotates together with the rotating body, and further comprising a fixing member that penetrates the rotating roller through the hollow of the rotating shaft and is fixed to the outside, wherein the fixing member is fixed to the outside and does not rotate even when the rotating shaft and the rotating body rotate, and a bearing is mounted between the fixing member and the rotating shaft. Claim 2 delete Claim 3 An electrode production device according to claim 1, wherein the heat supply member comprises: a heater part installed inside the protrusion; a power supply line connected to the heater part; and a power source that supplies power to the heater part through the power supply line. Claim 4 An electrode production device according to paragraph 3, wherein the heater portion is provided in plurality, and the plurality of heater portions are arranged along the circumference of the protrusion. Claim 5 An electrode production device according to claim 3, characterized by including: a temperature sensor for measuring the temperature inside the protrusion; and a control unit for controlling the operation of the heater unit based on the temperature inside the protrusion measured by the temperature sensor. Claim 6 An electrode production device according to claim 1, wherein the rotating roller has a non-protrusion on the side of the protrusion, and a cooling member is provided on the inner side of the non-protrusion. Claim 7 delete Claim 8 delete Claim 9 An electrode production device according to paragraph 3, characterized in that the power supply line is installed on the inner side of the fixed member. Claim 10 An electrode production device according to claim 6, wherein the cooling member comprises: a spray nozzle that sprays a cooling fluid through the non-protruding portion; a connecting passage connected to the spray nozzle; and a fluid supply source connected to the connecting passage to supply fluid. Claim 11 An electrode production device according to claim 10, characterized in that the fluid is air or water. Claim 12 An electrode production device according to claim 6, characterized in that a blocking partition is formed between the protrusion and the non-protrusion to block heat supplied to the protrusion from moving to the non-protrusion. Claim 13 An electrode production device according to claim 12, characterized in that the above-mentioned blocking partition is formed of a material having lower thermal conductivity than the above-mentioned rotating roller. Claim 14 An electrode production device according to claim 1, characterized in that the above-mentioned maintenance pressurization unit includes a pressurization roller. Claim 15 A battery cell comprising an electrode produced using an electrode production device according to any one of claims 1, 3 to 6, and 9 to 14. Claim 16 A battery pack comprising at least one battery cell according to paragraph 15. Claim 17 An automobile comprising at least one battery cell according to paragraph 15.

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