Electrode production apparatus and battery cells containing electrodes produced using the same, battery packs containing said battery cells and automobiles

Abstract

An electrode production apparatus and 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 apparatus according to one embodiment of the present invention is an electrode production apparatus that produces electrodes by transporting an electrode foil having a coating portion provided with a coating layer and an uncoated portion formed thereon, and includes a transport unit for transporting the electrode foil, a coating portion pressurizing unit for pressurizing the coating portion of the electrode foil transported by the transport unit, and an uncoated portion pressurizing unit which is separated from the coating portion pressurizing unit and pressurizes the uncoated portion, wherein the uncoated portion pressurizing unit is provided with a heat supply member for supplying heat to the uncoated portion.

Description

Technical Field

[0001] This application claims priority based on Korean Patent Application No. 10-2023-0127428 filed on September 22, 2023, and all the contents disclosed in the specification and drawings of the said application are incorporated into this application.

[0002] The present invention relates to an electrode production apparatus, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and a vehicle. More specifically, the present invention relates to an electrode production apparatus capable of improving electrode quality, a battery cell including an electrode produced using the same, a battery pack including the battery cell, and a vehicle.

Background Art

[0003] Generally, a secondary battery refers to a battery capable of repeated charging and discharging, such as a lithium-ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel metal hydride battery, a nickel zinc battery, etc.

[0004] Secondary batteries can be classified into cylindrical secondary batteries and prismatic secondary batteries in which an electrode assembly is built into a cylindrical or prismatic metal can according to the shape of the battery case, and pouch-type secondary batteries in which an electrode assembly is built into a pouch-type pouch made of an aluminum laminate sheet.

[0005] Such secondary batteries can be manufactured by housing an electrode assembly including a positive electrode and a negative electrode laminated with each other with a separator and an electrolyte substance in cases of various forms and sealing the cases.

[0006] An electrode (positive electrode or negative electrode) of a secondary battery may include a coated portion in which an electrode binder is pressure-bonded to the surface of an electrode foil to form a coating layer, and an uncoated portion where the coating layer is not formed.

[0007] On the other hand, electrodes for secondary batteries can be produced by a roll-to-roll process in which electrode foils, each with a coating layer on its surface, are wound and moved between rolls. In this process, the electrode foil is rolled by rolling rolls as it moves between the rolls. However, the rolling rolls apply pressure to the coated areas but do not contact the uncoated areas, resulting in a difference in the stretch rate between the coated and uncoated areas. In such cases, wrinkles or undulations occur in the uncoated areas, leading to a decrease in electrode quality. [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to provide an electrode production apparatus capable of improving electrode quality by minimizing the difference in stretching ratio between the coated and uncoated portions of an electrode foil, a battery cell containing an electrode produced using the apparatus, a battery pack containing the battery cell, and an automobile.

[0009] However, the technical problems that this invention aims to solve are not limited to those described above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description of the invention. [Means for solving the problem]

[0010] According to one aspect of the present invention, an electrode production apparatus is provided for producing electrodes by transporting an electrode foil having a coated portion with a coating layer and an uncoated portion, the apparatus comprising: a transport unit for transporting the electrode foil; a coated portion pressurizing unit for pressurizing the coated portion of the electrode foil transported by the transport unit; and an uncoated portion pressurizing unit located separately from the coated portion pressurizing unit for pressurizing the uncoated portion, wherein the uncoated portion pressurizing unit is equipped with a heat supply member for supplying heat to the uncoated portion.

[0011] In one embodiment, the non-coated portion pressurizing unit includes a rotating roller that rotates in contact with the electrode wheel, and at least one protrusion that protrudes from the rotating roller, and the heat supply member may be mounted inside the protrusion.

[0012] In one embodiment, the heat supply member may include a heater portion provided inside the protruding portion, a power supply line connected to the heater portion, and a power supply source that supplies power to the heater portion via the power supply line.

[0013] In one embodiment, the heater portion may be provided in multiple units, and the multiple heater portions may be arranged along the periphery of the protruding portion.

[0014] In one embodiment, the system may include a temperature sensor for measuring the temperature inside the protrusion, and a control unit for controlling the operation of the heater based on the temperature inside the protrusion measured by the temperature sensor.

[0015] In one embodiment, the rotating roller has a non-protruding portion on the side of the protruding portion, and a cooling member may be provided inside the non-protruding portion.

[0016] In one embodiment, the rotating roller may include a rotating body having a space formed inside it, and a rotating shaft extending integrally from the rotating body and rotating together with the rotating body.

[0017] In one embodiment, the system further includes a fixing member that passes through the rotating roller via the rotating shaft and is fixed to the outside, and a bearing may be installed between the fixing member and the rotating shaft.

[0018] In one embodiment, the power supply line may be provided inside the fixing member.

[0019] In one embodiment, the cooling member may include an injection nozzle that injects a cooling fluid into the non-projecting portion, a connecting flow path connected to the injection nozzle, and a fluid supply source connected to the connecting flow path to supply fluid.

[0020] In one embodiment, the fluid may be air or water.

[0021] In one embodiment, a partition wall may be formed between the projecting portion and the non-projecting portion to block the heat supplied to the projecting portion from moving to the non-projecting portion.

[0022] In one embodiment, the partition wall may be formed of a material having a lower thermal conductivity than the rotating roller.

[0023] In one embodiment, the coating portion pressing unit may include a pressing roller.

[0024] According to another embodiment of the present invention, a battery cell including an electrode produced using the above-described electrode production apparatus is provided, a battery pack including at least one of the above-described battery cells is provided, and an automobile including at least one of the above-described battery cells may be provided.

Advantages of the Invention

[0025] Embodiments of the present invention can minimize the difference in elongation between the coated portion and the non-coated portion of the electrode foil and improve the electrode quality.

[0026] However, the effects obtained from the present invention are not limited to the above-described effects, and further technical effects of the present invention not mentioned will be clearly understood by those skilled in the art from the following description of the invention.

[0027] The following drawings attached to this specification illustrate preferred 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 schematic perspective view of an electrode production apparatus according to an embodiment of the invention. [Figure 2] In an electrode production apparatus according to an embodiment of the present invention, it is a schematic perspective view of a non-coated portion pressurizing unit. [Figure 3] In an electrode production apparatus according to an embodiment of the present invention, it is a cross-sectional view of a non-coated portion pressurizing unit. [Figure 4] It is a cross-sectional view taken along A-A' of FIG. 2. [Figure 5] It is a view showing a modified embodiment of FIG. 4. [Figure 6] It is a cross-sectional view taken along B-B' of FIG. 2. [Figure 7] It is a view schematically showing the configuration of a battery pack including a battery cell equipped with an electrode produced using the electrode production apparatus according to each embodiment of the present invention. [Figure 8] It is a view for explaining an automobile including the battery pack of FIG. 7.

Modes for Carrying Out the Invention

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and the claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor himself / herself must interpret them in accordance with the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that he / she can appropriately define the concept of the terms in order to explain the invention in the best way. Therefore, it must be understood that the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0030] The size of each component or specific part of a component in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity and ease of explanation. Therefore, the size of each component may not fully reflect its actual size. Specific descriptions of known functions or configurations related to the present invention will be omitted if they are deemed to unnecessarily obscure the gist of the invention.

[0031] As used herein, the terms “joining” or “connecting” include not only cases where one member is directly joined or directly connected to another member, but also cases where one member is indirectly joined or indirectly connected to another member via a connecting member.

[0032] Figure 1 is a schematic perspective view of an electrode production apparatus according to one embodiment of the present invention; Figure 2 is a schematic perspective view of a non-coated area pressurizing unit in an electrode production apparatus according to one embodiment of the present invention; Figure 3 is a cross-sectional view of a non-coated area pressurizing unit in an electrode production apparatus according to one embodiment of the present invention; Figure 4 is a cross-sectional view taken along line A-A' in Figure 2; Figure 5 shows a modified embodiment of Figure 4; and Figure 6 is a cross-sectional view taken along line B-B' in Figure 2.

[0033] Referring to Figure 1, an electrode production apparatus 10 according to one embodiment of the present invention relates to an apparatus for producing electrodes (positive or negative electrodes) by transporting an electrode foil 900 on which a coating layer 910 is formed. The term "electrode" is a concept that includes both wet electrodes and dry electrodes.

[0034] For example, a wet electrode is manufactured by applying a slurry-like electrode mixture containing a solvent to the surface of an electrode substrate such as an electrode foil 900 to form a coating layer 910, and then drying the coating layer 910.

[0035] The dry electrode is manufactured through a process in which a solvent-free powder (powder mixture) electrode mixture is pressed onto the surface of an electrode foil 900 to form a coating layer 910. That is, the electrode mixture is mixed without a liquid medium such as a solvent or dispersion medium, and then the powdered electrode mixture is pressed onto the surface, for example, while passing it through a rolling mill.

[0036] Here, the electrode foil 900 may include a coated portion 920 on which an active material coating layer 910 is formed on its surface, and an uncoated portion 930 on which the active material coating layer 910 is not formed.

[0037] Referring to Figure 1, an electrode production apparatus 10 according to one embodiment of the present invention includes a transfer unit 100, a coating section pressurizing unit 200, and a non-coating section pressurizing unit 300.

[0038] The transfer unit 100 transfers the electrode foil 900 on which the coating layer 910 is formed. The transfer unit 100 can take various forms and may include, for example, a plurality of transfer rollers 110 to transfer the electrode foil 900 in a roll-to-roll manner.

[0039] However, the transfer unit 100 is not limited to this, but for the sake of explanation, an embodiment in which the transfer unit 100 includes a plurality of transfer rollers 110 will be described below. The arrows in Figure 1 indicate the transfer direction of the electrode wheel 900.

[0040] The coating pressure unit 200 pressurizes the coating portion 920 of the electrode wheel 900, which is transported by the transfer unit 100. The coating pressure unit 200 can be configured in various ways and may include, for example, a pressure roller 210.

[0041] Referring to Figure 1, the coated portion 920 of the electrode foil 900 has a coating layer 910 of the active material, while the uncoated portion 930 does not have the coating layer 910. Therefore, the coated portion 920 is thicker than the uncoated portion 930.

[0042] In this case, if only the coated portion 920 is pressurized by the coated portion pressurizing unit 200, the uncoated portion 930, which is not pressurized, may develop wrinkles or undulations or distortions during transport by the transport roller 110. To prevent the generation of such wrinkles or undulations or distortions in the uncoated portion 930, the electrode production apparatus 10 according to one embodiment of the present invention includes an uncoated portion pressurizing unit 300. However, even if the uncoated portion 930 is pressurized by the uncoated portion pressurizing unit 300, a difference in stretching rate may occur between the coated portion 920 and the uncoated portion 930.

[0043] Therefore, the electrode production apparatus 10 according to one embodiment of the present invention, including the heat supply member 400, can minimize the difference in stretching ratio between the coated portion 920 and the uncoated portion 930. A detailed explanation of this will be given later.

[0044] The non-coated area pressurizing unit 300 pressurizes the non-coated area 930 while being separated from the coated area pressurizing unit 200.

[0045] Referring to Figure 2, the non-coated area pressurizing unit 300 may include a rotating roller 310 and a protruding portion 312. A non-protruding portion 313 is formed on the side of the protruding portion 312.

[0046] Referring to Figure 1, the rotating roller 310 rotates in contact with the electrode wheel 900. There are various ways in which the rotating roller 310 rotates. For example, it can rotate while coupled to a belt 316 (see Figure 3).

[0047] Referring to Figures 2 and 3, the rotating roller 310 may include a rotating body 311 and a rotating shaft 315.

[0048] The rotating body 311 may have a space formed inside it. A heat supply member 400 and a cooling member 700, which will be described later, may be provided in the space inside the rotating body 311. The heat supply member 400 may be provided inside the protruding portion 312, and the cooling member 700 may be provided inside the non-protruding portion 313.

[0049] The rotating shaft 315 extends integrally from the rotating body 311 and rotates together with the rotating body 311. The rotating shaft 315 may be configured to rotate in conjunction with the belt 316. That is, for example, when the belt 316 wound around the rotating shaft 315 rotates, the rotating shaft 315 connected to the belt 316 also rotates together with it. However, the method of rotation of the rotating shaft 315 is not limited to this. The belt 316 can be rotated by connecting it to a variety of drive sources, such as a motor.

[0050] The rotating shaft 315 may have a hollow center, and the fixing member 600 may be configured to pass through the rotating roller 310 through the hollow of the rotating shaft 315.

[0051] Referring to Figure 3, the fixing member 600 penetrates the rotating roller 310 through the rotating shaft 315 and is fixed to the outside. For example, as mentioned above, since the rotating shaft 315 has a hollow structure, the fixing member 600 penetrates both the hollow of the rotating shaft 315 and the rotating body 311.

[0052] Here, the fixing member 600 can be supported by being coupled to a support base 620 located on the outside of the rotating roller 310. Various types of bearings 610 can be coupled between the fixing member 600 and the rotating shaft 315. In this way, when the fixing member 600 is coupled and fixed to the support base 620 on the outside of the rotating roller 310, passing through the rotating shaft 315 and the rotating body 311, the fixing member 600 will not rotate even when the rotating shaft 315 and the rotating body 311 rotate.

[0053] In this case, a bearing 610 can be connected between the fixed member 600 and the rotating shaft 315, thereby reducing friction between the rotating shaft 315 and the fixed member 600.

[0054] Referring further to Figure 3, the power supply line 420 of the heat supply member 400 (described later) and the connecting passage 720 of the cooling member 700 can pass between the fixing members 600. That is, the power supply line 420 of the heat supply member 400 and the connecting passage 720 of the cooling member 700 can be provided inside the fixing 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 passage 720 do not rotate, thus preventing twisting or interference.

[0055] One or more protrusions 312 are provided and are 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 predetermined intervals.

[0056] Furthermore, the protruding portion 312 may be formed integrally with the rotating body 311. However, the protruding portion 312 does not necessarily have to be formed integrally with the rotating body 311, and the protruding portion 312 may be detachably connected to the rotating body 311.

[0057] Referring to Figure 1, the protruding portion 312 extends from the rotating body 311 of the rotating roller 310 and contacts the uncoated portion 930, thereby applying pressure to the uncoated portion 930 of the electrode wheel 900.

[0058] Referring to Figure 3, the heat supply member 400 is provided in the uncoated portion pressurization unit 300 to supply heat to the uncoated portion 930. For example, the heat supply member 400 may be mounted inside the protrusion 312.

[0059] The heat supply member 400 may include a heater section 410, a power supply line 420, and a power supply source 430.

[0060] The heater section 410 may be provided inside the protruding section 312. The heater section 410 may be provided in various directions. Furthermore, the heater section 410 may be provided in various numbers. For example, as shown in Figure 4, one heater section 410 may be provided so as to be directed downward with respect to Figure 4.

[0061] Referring to Figure 5 as an example of a modified embodiment, three heater units 410 may be provided facing left, right, and downward. However, this is only one embodiment, and the direction and number of heater units 410 can be set in a wider variety of ways. For example, multiple heater units 410 may be provided and arranged around the perimeter of the protruding portion 312.

[0062] 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 uncoated portion 930 and pressurizes it. When the protrusion 312, whose temperature has been raised by the heater unit 410, pressurizes the uncoated portion 930, the elongation rate of the uncoated portion 930 is maximized by the heat. This makes it possible to minimize the difference in elongation rates between the coated portion 920 and the uncoated portion 930.

[0063] On the other hand, the heater unit 410 could be a wireless heater that operates wirelessly.

[0064] The power supply line 420 is connected to the heater unit 410 and transmits energy (e.g., electrical 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.

[0065] The power supply line 420 is connected to the heater section 410 via the fixing member 600. Even when the rotating roller 310 rotates, the fixing member 600 remains fixed, preventing the power supply line 420 from rotating. This prevents the power supply line 420 from twisting.

[0066] The power supply source 430 supplies power to the heater unit 410 via the power supply line 420. The power supply source 430 can take various forms and may, for example, be various batteries that supply electrical energy to the heater unit 410, but is not limited to this.

[0067] 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 by wire, but it may also be controlled wirelessly by the control unit 510. If the temperature sensor 500 is connected to the control unit 510 by wire, the temperature sensor 500 may be mounted on the fixing member 600.

[0068] 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 stretch ratio between the coated portion 920 and the uncoated portion 930 is minimized may differ for each model of the battery cell 20. Here, the optimal temperature of the protrusion 312 for each model can be determined through experimentation.

[0069] Then, the optimal temperature of the protruding portion 312 for each model is pre-inputted into the control unit 510, and the control unit 510 compares the actual temperature of the protruding portion 312 measured by the temperature sensor 500 with the optimal temperature input to the control unit 510, and controls the operation of the heater unit 410 based on the result.

[0070] For example, if the actual measured temperature of 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 its temperature, and if the actual measured temperature of 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 its temperature.

[0071] Referring to Figure 3, the cooling member 700 may be provided on the non-protruding portion 313 of the non-coated portion pressurizing unit 300. The cooling member 700 prevents the temperature of the non-protruding portion 313 from rising due to the heat supplied from the heat supply member 400 provided on the protruding portion 312.

[0072] In other words, the non-protruding portion 313 comes into contact with the coated portion 920 of the electrode foil 900, and as the temperature of the non-protruding portion 313 rises, the elongation rate of the coated portion 920 increases, which in turn increases the difference in elongation rates between the coated portion 920 and the non-coated portion 930.

[0073] Therefore, the cooling member 700 prevents the temperature of the non-protruding portion 313 from rising and prevents an increase in the elongation rate of the coated portion 920. The heat supply member 400 then raises the temperature of the protruding portion 312, increasing the elongation rate of the non-coated portion 930, thereby minimizing the difference in elongation rates between the coated portion 920 and the non-coated portion 930.

[0074] Referring to Figures 3 and 6, the cooling member 700 includes an injection nozzle 710, a connecting channel 720, and a fluid supply source 730.

[0075] The injection nozzle 710 is attached to the non-protruding portion 313 of the non-coated portion pressurizing unit 300 and injects cooling fluid into the non-protruding portion 313. The connecting channel 720 is connected to the injection nozzle 710 and allows the fluid supplied from the fluid supply source 730 to move to the injection nozzle 710.

[0076] The fluid supply source 730 is connected to the connecting passage 720, and fluid is supplied to the injection nozzle 710 via the connecting passage 720. Here, the fluid may be air or water, but is not limited to these. As mentioned above, the connecting passage 720 of the cooling member 700 may pass between the fixed members 600.

[0077] On the other hand, a barrier wall 800 may be formed between the protruding portion 312 and the non-protruding portion 313 to block the heat supplied to the protruding portion 312 from moving to the non-protruding portion 313. Here, the barrier wall 800 may be formed from a material with a lower thermal conductivity than the rotating roller 310.

[0078] The barrier partition 800 is coupled to the rotating body 311 and can rotate together with the rotating body 311. Here, when the barrier partition 800 rotates, the barrier partition 800 may be separated from the fixing member 600 by a predetermined distance 810 (see enlarged portion of Figure 3) so as not to interfere with the fixing member 600.

[0079] In the electrode production apparatus 10 according to one embodiment of the present invention, the heat supplied by the heat supply member 400 provided on the protruding portion 312 raises the temperature of the protruding portion 312, but the temperature of the non-protruding portion 313 cannot be raised by the barrier wall 800.

[0080] However, even with the barrier 800 in place, heat from the protruding portion 312 can be transferred to the non-protruding portion 313. For example, as described above, heat can be transferred from the protruding portion 312 to the non-protruding portion 313 through the gap 810 formed between the barrier 800 and the fixing member 600. In this case, however, the cooling member 700 provided on the non-protruding portion 313 can lower the temperature of the non-protruding portion 313 and maintain a preset appropriate temperature.

[0081] This minimizes the difference in stretch ratio between the coated portion 920 and the uncoated portion 930 of the electrode foil 900, thereby improving electrode quality.

[0082] Figure 7 is a schematic diagram showing the configuration of a battery pack including a battery cell equipped with electrodes produced using an electrode production apparatus according to each embodiment of the present invention.

[0083] Referring to Figure 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 electrodes produced using the electrode production apparatus 10 according to each embodiment of the present invention as described above.

[0084] Furthermore, the battery pack 30 may further include a pack housing 31 for housing the battery cells 20, and various devices for controlling the charging and discharging of the battery cells 20, such as a BMS, current sensor, fuse, etc.

[0085] Figure 8 is a diagram illustrating the automobile including the battery pack shown in Figure 7.

[0086] Referring to Figure 8, an automobile 40 according to one embodiment of the present invention may include one or more battery cells 20 or battery packs 30 containing electrodes produced using the electrode production apparatus 10 according to each embodiment of the present invention. Here, the automobile 40 includes various automobiles that use electricity, such as electric vehicles or hybrid vehicles.

[0087] In this specification, terms indicating direction such as up, down, left, right, front, and back are used, but such terms merely indicate relative positions and are for the sake of convenience of explanation. It is obvious to those skilled in the art that these positions can change depending on the position of the object in question, the observer's position, etc.

[0088] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that various modifications and variations are possible within the scope of equivalence between the technical idea of ​​the present invention and the claims below by persons with ordinary skill in the art to which the present invention pertains. Therefore, the above embodiments should be considered from an explanatory rather than restrictive viewpoint. That is, the true technical idea of ​​the present invention is shown in the claims, and all differences within the scope of equivalence thereto should be interpreted as being included in the present invention. [Industrial applicability]

[0089] The present invention relates to an electrode production apparatus, a battery cell containing electrodes produced using the apparatus, a battery pack containing the battery cell, and an automobile, and is particularly applicable to the secondary battery industry. [Explanation of symbols]

[0090] 10 Electrode production equipment 20 battery cells 30 Battery Packs 31 Pack Housing 40 Automobiles 100 Transfer Units 110 Transfer Rollers 200 Coating Section Pressurization Unit 210 Pressure Roller 300 Non-coated area pressurization unit 310 Rotating Rollers 311 Rotating Body 312 Protrusion 313 Non-protruding part 315 Rotating shaft 316 Belt 400 Heat supply component 410 Heater section 420 Power supply line 430 Power supply source 500 temperature sensors 510 Control Unit 600 Fixing member 610 bearing 620 Support stand 700 Cooling components 710 Spray Nozzle 720 Connecting channel 730 Fluid Source 800 Barrier bulkhead 900 Electrode Foil 910 Active material coating layer 920 Coating area 930 Uncoated area

Claims

1. An electrode production apparatus for producing electrodes by transporting an electrode foil having a coated portion with a coating layer and an uncoated portion without a coating, A transfer unit for transferring the electrode foil, A coating pressure unit that pressurizes the coating portion of the electrode foil being transported by the transfer unit, It includes a non-coated portion pressurizing unit which is separated from the coating portion pressurizing unit and pressurizes the non-coated portion, An electrode production apparatus characterized in that the non-coated portion pressurization unit is equipped with a heat supply member that supplies heat to the non-coated portion.

2. The aforementioned non-coated portion pressurization unit is A rotating roller that rotates in contact with the electrode wheel, It includes at least one protrusion that extends from the rotating roller, The electrode production apparatus according to claim 1, characterized in that the heat supply member is attached to the inside of the protrusion.

3. The heat supply member is A heater portion provided inside the aforementioned protrusion, A power supply line connected to the heater section, The electrode production apparatus according to claim 2, further comprising a power supply source that supplies power to the heater section via the power supply line.

4. Multiple heater units are provided. The electrode production apparatus according to claim 3, characterized in that the plurality of heater units are arranged along the periphery of the protruding portion.

5. A temperature sensor for measuring the temperature inside the protruding portion, The electrode production apparatus according to claim 3, further comprising a control unit that controls the operation of the heater unit based on the temperature inside the protrusion measured by the temperature sensor.

6. The rotating roller has a non-protruding portion on the side of the protruding portion, The electrode production apparatus according to claim 2, characterized in that a cooling member is provided inside the non-protruding portion.

7. The aforementioned rotating roller is A rotating body with a space formed inside, The electrode production apparatus according to claim 3, characterized in that it includes a rotating shaft that extends integrally from the rotating body and rotates together with the rotating body.

8. The system further includes a fixing member that penetrates the rotating roller through the aforementioned rotating shaft and is fixed to the outside, The electrode production apparatus according to claim 7, characterized in that a bearing is installed between the fixed member and the rotating shaft.

9. The electrode production apparatus according to claim 8, characterized in that the power supply line is provided inside the fixing member.

10. The cooling member is An injection nozzle for injecting cooling fluid into the non-protruding portion, A connecting channel connected to the injection nozzle, The electrode production apparatus according to claim 6, characterized in that it includes a fluid supply source connected to the connecting channel and supplying fluid.

11. The electrode production apparatus according to claim 10, characterized in that the fluid is air or water.

12. The electrode production apparatus according to claim 6, characterized in that a barrier wall is formed between the protruding portion and the non-protruding portion to block the heat supplied to the protruding portion from moving to the non-protruding portion.

13. The electrode production apparatus according to claim 12, characterized in that the barrier wall is formed from a material with lower thermal conductivity than the rotating roller.

14. The electrode production apparatus according to claim 1, characterized in that the coating pressure unit includes a pressure roller.

15. A battery cell comprising electrodes produced using an electrode production apparatus according to any one of claims 1 to 14.

16. A battery pack comprising at least one battery cell as described in claim 15.

17. An automobile comprising at least one battery cell as described in claim 15.

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