Pole piece water removal device

Abstract

The utility model provides an electrode plate water removal device. The electrode plate water removal device comprises: an unwinding part; a winding part; a first water removal assembly arranged between the unwinding part and the winding part, the first water removal assembly being used for baking the coated electrode plate; a roller pressing part arranged between the unwinding part and the winding part and located downstream of the first water removal assembly; and a second water removal assembly located between the roller pressing part and the winding part, the second water removal assembly being arranged at a discharge end of the roller pressing part, the second water removal assembly being used for secondary baking of the electrode plate pressed by the roller pressing part. The electrode plate water removal device of the technical scheme of the utility model can solve the problem of poor water removal effect of the existing water removal equipment for removing water from the electrode plate, long vacuum baking time before liquid injection, and prolonged battery production cycle.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and more specifically, to an electrode dehydration device. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, controlling the moisture content of the battery electrodes is crucial. Moisture in the electrodes directly affects the battery's cycle performance and rate capability. Excessive moisture content in the electrodes leads to severe capacity decay and unstable cycling, with even more pronounced capacity decay at high rates. Furthermore, after short-term cycling, the battery's internal resistance and electrochemical reaction impedance increase with increasing moisture content. Therefore, to ensure good electrochemical performance of the battery cells, moisture control is extremely stringent.

[0003] In the production process of electrode sheets, existing dehydration equipment usually bakes the coated electrode sheets, which has a poor moisture removal effect, resulting in a long vacuum baking time before liquid injection and extending the battery production cycle. Utility Model Content

[0004] The main purpose of this invention is to provide an electrode dehydration device that can solve the problem that using existing dehydration equipment to dehydrate electrodes results in poor moisture removal, leading to a long vacuum baking time before electrolyte injection and extending the battery production cycle.

[0005] To achieve the above objectives, this utility model provides an electrode dewatering device, comprising: an unwinding section; a winding section; a first dewatering component disposed between the unwinding section and the winding section, the first dewatering component being used to bake the coated electrode; a rolling section disposed between the unwinding section and the winding section and located downstream of the first dewatering component; and a second dewatering component disposed between the rolling section and the winding section, the second dewatering component being disposed at the discharge end of the rolling section, the second dewatering component being used to perform secondary baking on the electrode after it has been rolled by the rolling section.

[0006] Furthermore, the second dewatering component includes a housing and a heating structure. The housing is provided with an inlet and an outlet, and the heating structure is located inside the housing.

[0007] Furthermore, the heating structure includes multiple heating elements, and at least one of the top wall, bottom wall, and side wall of the housing is provided with multiple heating elements; and / or, the electrode dehydration device also includes a temperature measuring device and a control unit, the temperature measuring device is installed inside the housing, and both the temperature measuring device and the heating structure are communicatively connected to the control unit.

[0008] Furthermore, the second dewatering assembly also includes multiple first rollers, which are arranged alternately at different heights within the housing along the conveying direction of the electrode sheets.

[0009] Furthermore, the first group of first rollers in the plurality of first rollers is located at the top of the box, and the second group of first rollers in the plurality of first rollers is located at the bottom of the box. Both the first group of first rollers and the second group of first rollers include a plurality of first rollers. In the first group of first rollers, the height of the two first rollers located at both ends is greater than the height of the remaining first rollers.

[0010] Furthermore, the electrode dehydration device also includes a cooling structure, which is located at the discharge port.

[0011] Furthermore, the housing is also equipped with an air inlet, and the electrode dehydration device also includes an air supply unit and a delivery pipeline. The air supply unit is used to provide dry compressed air, one end of the delivery pipeline is connected to the air outlet of the air supply unit, and the other end of the delivery pipeline is connected to the air inlet.

[0012] Furthermore, the air intake is located at the top of the enclosure; and / or, a fan is installed inside the enclosure.

[0013] Furthermore, the electrode dewatering device also includes at least two tensioning units, with at least one tensioning unit provided between the unwinding section and the rolling section, and at least one tensioning unit provided between the housing and the winding section; and / or, the electrode dewatering device also includes a thickness detection structure, which is located at the discharge port.

[0014] Furthermore, the electrode dehydration device also includes a detection component, which is located between the housing and the winding section. The detection component is used to detect the water content of the electrode after it has been baked by the second dehydration component.

[0015] The present invention comprises an unwinding section, a winding section, a rolling section, a first dehydration assembly, and a second dehydration assembly. The unwinding section releases the coated electrode roll. The unwound electrode first passes through the first dehydration assembly, which performs a first baking to remove most of the moisture from the electrode. The electrode after preliminary dehydration is then conveyed to the rolling section, which rolls the electrode to adjust its thickness and increase its density, ensuring the performance and consistency of the battery cell. The electrode after rolling is then conveyed to the second dehydration assembly, which performs a second baking. The microstructure of the rolled electrode has already changed, and this second baking can more effectively remove residual moisture from the electrode. The electrode dehydration device of this application can perform a first baking after electrode coating and a second baking after rolling, thereby removing moisture from the electrode more thoroughly before the electrode is wound up. The electrode dehydration effect is better, which reduces the vacuum baking time required before liquid injection after assembly. This not only improves the dehydration efficiency, but also reduces the waiting time on the production line, thereby shortening the entire battery production cycle. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Fig. 1 A schematic diagram of the overall structure of the electrode dewatering device according to an embodiment of the present invention is shown;

[0018] Fig. 2 A partial structural schematic diagram of the electrode dewatering device according to an embodiment of the present invention is shown;

[0019] Fig. 3 A partial structural schematic diagram of the electrode dewatering device according to an embodiment of the present invention is shown.

[0020] The above figures include the following reference numerals:

[0021] 10. Electrode sheet; 20. Second dewatering assembly; 21. Unwinding section; 22. Rewinding section; 23. Roll pressing section; 231. First roll; 232. Second roll; 241. Housing; 242. Feed inlet; 243. Discharge outlet; 244. Heating element; 245. First pass roll; 246. Air inlet; 30. Temperature measuring device; 40. Detection assembly; 41. Sampling section; 42. Detection section; 50. Thickness detection structure; 60. Tensioning unit; 61. Second pass roll; 70. Third pass roll; 80. Air supply section; 90. Conveying pipeline. Detailed Implementation

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] See also Figs. 1-3 As shown, this utility model provides an electrode dewatering device, which includes: an unwinding section 21; a winding section 22; a first dewatering component disposed between the unwinding section 21 and the winding section 22, the first dewatering component being used to bake the coated electrode 10; a rolling section 23 disposed between the unwinding section 21 and the winding section 22 and located downstream of the first dewatering component; and a second dewatering component 20 disposed between the rolling section 23 and the winding section 22, the second dewatering component 20 being disposed at the discharge end of the rolling section 23, the second dewatering component 20 being used to perform secondary baking on the electrode 10 after it has been rolled by the rolling section 23.

[0024] In this embodiment, the unwinding section 21 is used to release the coated electrode sheet 10 roll. The unwound electrode sheet 10 first passes through the first dehydration component. At this time, the first dehydration component can bake the electrode sheet 10 for the first time to remove most of the moisture on the electrode sheet 10. The electrode sheet 10 after preliminary dehydration is conveyed to the rolling section 23. The rolling section 23 rolls the electrode sheet 10 to adjust the thickness of the electrode sheet 10 and increase the density of the electrode sheet 10 to ensure the performance and consistency of the battery cell. The electrode sheet 10 after being rolled by the rolling section 23 is conveyed to the second dehydration component 20. The second dehydration component 20 bakes the electrode sheet 10 a second time. Here, the second baking of the electrode sheet 10 by the second dehydration component 20 means that the second dehydration component 20 bakes the electrode sheet 10 a second time, rather than performing two baking operations. The electrode sheet 10 has changed in microstructure after being rolled. At this time, baking again can more effectively remove the residual moisture inside the electrode sheet 10. As can be seen from the above, the electrode dehydration device of this application can perform a first baking after the electrode 10 is coated and a second baking after rolling, thereby more fully removing the moisture in the electrode 10 before the electrode 10 is wound up. The dehydration effect of the electrode 10 is better, thereby reducing the vacuum baking time required before liquid injection after assembly. This not only improves the dehydration efficiency, but also reduces the waiting time of the production line, thereby shortening the entire battery production cycle.

[0025] See also Figs. 1-3 As shown, in one embodiment of the present invention, the rolling section 23 includes a first roll 231 and a second roll 232 arranged opposite to each other, and a rolling gap is formed between the first roll 231 and the second roll 232. The electrode 10 passes through the rolling gap, and the first roll 231 and the second roll 232 cooperate to realize the rolling operation of the electrode 10.

[0026] See also Figs. 1-3 As shown, in one embodiment of the present invention, the second dewatering component 20 includes a housing 241 and a heating structure. The housing 241 is provided with an inlet 242 and an outlet 243, and the heating structure is disposed inside the housing 241.

[0027] In this embodiment, the electrode 10 enters the housing 241 through the feed port 242, and then exits the housing 241 through the discharge port 243 after secondary baking by the second dehydration component 20. The heating structure can promote the rapid evaporation of moisture inside the electrode 10, significantly reducing the time required for the electrode 10 in subsequent processes (such as vacuum baking before liquid injection). This is because the electrode 10 has already reached a low moisture content before winding, eliminating the need for lengthy additional drying, thereby shortening the overall production cycle and reducing energy consumption and costs.

[0028] It should be noted that the first water removal component can adopt the existing water removal structure or the structure of the second water removal component 20 of this application.

[0029] See also Figs. 1-3 As shown, in one embodiment of the present invention, the heating structure includes a plurality of heating elements 244, and at least one of the top wall, bottom wall and side wall of the housing 241 is provided with a plurality of heating elements 244.

[0030] In this embodiment, the arrangement of multiple heating elements 244 can significantly increase the heat output per unit time, thereby accelerating the dewatering rate of the electrode 10.

[0031] In one embodiment, the heating element 244 may be a laser heating device of the prior art, and the specific structure will not be described in detail here.

[0032] In one embodiment of this invention, multiple heating elements 244 are provided on the top wall, bottom wall, and side walls of the housing 241. The electrode 10 can receive heat simultaneously from multiple directions as it passes through the housing 241. This omnidirectional heating method helps to ensure uniform evaporation of moisture inside the electrode 10, avoiding problems such as localized overheating or uneven heating. By providing heating elements 244 on the top wall, bottom wall, and side walls of the housing 241, space can be utilized more effectively, heat loss reduced, and energy utilization efficiency improved.

[0033] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dehydration device further includes a temperature measuring device 30 and a control unit. The temperature measuring device 30 is installed inside the housing 241, and both the temperature measuring device 30 and the heating structure are communicatively connected to the control unit.

[0034] In this embodiment, the temperature measuring device 30 is used to monitor the temperature inside the chamber 241 in real time. The control unit, based on the received temperature data, can dynamically adjust the power output of the heating structure to achieve precise control of the heating process. For example, when the temperature measuring device 30 detects that the temperature inside the chamber 241 is too high, the control unit can immediately reduce the heating power, and vice versa. Based on real-time temperature feedback, the control unit can adjust the heating strategy to avoid unnecessary energy waste. Especially when the electrode 10 is close to its ideal dry state, the heating intensity can be gradually reduced, thereby improving energy utilization efficiency.

[0035] It should be noted that the temperature measuring device 30 can be an infrared thermometer or temperature sensor of existing technology, and the control unit can be a PLC (programmable logic controller) of existing technology.

[0036] See also Figs. 1-3As shown, in one embodiment of the present invention, the second dewatering component 20 further includes a plurality of first rollers 245, which are arranged alternately at high and low intervals in the housing 241 along the conveying direction of the electrode sheet 10.

[0037] In this embodiment, the alternating high and low arrangement of the first rollers 245 increases the path length and residence time of the electrode 10 within the housing 241, allowing the electrode 10 to be more fully heated and baked by the heating structure, thereby improving the dehydration effect of the electrode 10. The alternating high and low arrangement of multiple first rollers 245 also controls the tension of the electrode 10 during transport, preventing damage due to excessive tension or relaxation due to insufficient tension, ensuring stable transport of the electrode 10, and improving production efficiency.

[0038] See also Figs. 1-3 As shown, in one embodiment of the present invention, the first group of first rollers 245 among the plurality of first rollers 245 is located at the top of the housing 241, and the second group of first rollers 245 among the plurality of first rollers 245 is located at the bottom of the housing 241. Both the first group of first rollers 245 and the second group of first rollers 245 include a plurality of first rollers 245. In the first group of first rollers 245, the height of the two first rollers 245 located at both ends is greater than the height of the remaining first rollers 245.

[0039] In this embodiment, both the first group of first guide rollers 245 and the second group of first guide rollers 245 include multiple first guide rollers 245 arranged at intervals along the conveying direction of the electrode 10. The first group of first guide rollers 245 is located at the top of the housing 241, and the second group of first guide rollers 245 is located at the bottom of the housing 241. This makes full use of the internal space of the housing 241. In the first group of first guide rollers 245, the height of the two first guide rollers 245 at both ends is higher than the height of the first guide roller 245 located between the two first guide rollers 245. As can be seen from the above, the multiple first guide rollers 245 in the housing 241 are located at different heights. Furthermore, the multiple first guide rollers 245 of the first group and the multiple first guide rollers 245 of the second group are arranged alternately and at intervals along the conveying direction of the electrode 10. This special arrangement of the first guide rollers 245 can guide the electrode 10 to form an S-shaped path in the housing 241, increasing its travel distance in the drying chamber, thereby extending the drying time and improving the drying effect. The first roller 245, which is higher at both ends, can serve as a guide to ensure that the electrode 10 does not deviate from the preset trajectory.

[0040] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dewatering device further includes a cooling structure, which is disposed at the discharge port 243.

[0041] In this embodiment, after the electrode 10 is baked by the heating structure inside the housing 241, its surface temperature is high. The cooling structure can immediately cool it, preventing changes in the material properties of the electrode 10 due to high temperature, such as decomposition of active materials and degradation of binder performance, thus ensuring that the electrochemical performance of the electrode 10 is not affected. At the same time, the cooling process helps to eliminate residual water vapor on the surface of the electrode 10, preventing it from recondensing into liquid water and ensuring that the electrode 10 is completely dry.

[0042] In one embodiment, the cooling structure may be a fan or a heat exchanger.

[0043] See also Figs. 1-3 As shown, in one embodiment of the present invention, the housing 241 is further provided with an air inlet 246, and the electrode dehydration device also includes an air supply unit 80 and a conveying pipeline 90. The air supply unit 80 is used to provide dry compressed air, one end of the conveying pipeline 90 is connected to the air outlet of the air supply unit 80, and the other end of the conveying pipeline 90 is connected to the air inlet 246.

[0044] In this embodiment, dry compressed air enters the housing 241 through the delivery pipeline 90 and forms hot air under the action of the heating structure, which enhances the drying capacity of the dehydration device. Compared with drying by simply relying on the heating structure, it accelerates the evaporation of moisture on the surface of the electrode 10. In addition, the flow of compressed air can carry away water vapor and prevent water vapor from falling back onto the surface of the electrode 10, thereby ensuring the dehydration effect of the electrode 10.

[0045] In one embodiment, the air supply unit 80 may be an air compressor.

[0046] See also Figs. 1-3 As shown, in one embodiment of the present invention, the air inlet 246 is disposed on the top of the housing 241.

[0047] In this embodiment, the feed inlet 242 and the discharge outlet 243 also serve as outlets for water vapor. The feed inlet 242 and the discharge outlet 243 are respectively located on opposite side walls of the housing 241, and the air inlet 246 is located on the top wall of the housing 241. Compressed air is blown into the housing 241 from top to bottom. When water vapor encounters compressed air from the top, it will be pushed downwards, allowing the water vapor to be quickly discharged from the housing 241 through the feed inlet 242 and the discharge outlet 243, thus preventing water vapor from circulating inside the housing 241 and preventing the electrode 10 from reabsorbing moisture.

[0048] In one embodiment of this utility model, a fan is provided inside the housing 241.

[0049] In this embodiment, a fan is installed inside the housing 241, which can promote faster circulation and diffusion of dry compressed air, ensuring that the air has sufficient contact with the surface of the electrode 10 and improving drying efficiency.

[0050] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dewatering device further includes at least two tensioning units 60, with at least one tensioning unit 60 disposed between the unwinding section 21 and the roller pressing section 23, and at least one tensioning unit 60 disposed between the housing 241 and the winding section 22.

[0051] In this embodiment, the tensioning unit 60 can apply the necessary tension to the electrode 10 to prevent the electrode 10 from becoming loose, folded or bent during the transport process.

[0052] See also Figs. 1-3 As shown, in one embodiment of the present invention, the tensioning unit 60 includes at least three second rollers 61, which are arranged at alternating heights along the conveying direction of the electrode sheet.

[0053] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dewatering device further includes four third rollers 70, wherein two third rollers 70 are located on the side where the feed inlet of the housing 241 is located, and the other two third rollers 70 are located on the side where the discharge outlet of the housing 241 is located.

[0054] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dewatering device further includes a thickness detection structure 50, which is disposed at the discharge port 243.

[0055] In this embodiment, the thickness detection structure 50 is used to detect the thickness of the dried electrode 10 to ensure that it meets the predetermined standard. By detecting the thickness of the electrode 10 in real time, it is possible to quickly identify whether the thickness of the electrode 10 meets the production requirements. If the thickness does not meet the requirements, the staff can take measures to adjust the drying parameters or check the equipment status in a timely manner to prevent unqualified products from entering subsequent processes, thereby improving product quality.

[0056] See also Figs. 1-3 As shown, in one embodiment of the present invention, the electrode dehydration device further includes a detection component 40, which is disposed between the housing 241 and the winding section 22. The detection component 40 is used to detect the water content of the electrode 10 after it has been baked by the second dehydration component 20.

[0057] In this embodiment, the detection component 40 can detect the water content of the electrode 10 after the baking process is completed. Compared to discovering moisture problems in subsequent processes, this allows for earlier and more accurate monitoring of the drying effect, ensuring that the water content of the electrode 10 meets stringent manufacturing standards. Based on the water content data fed back by the detection component 40, operators or automated control systems can dynamically adjust the baking parameters of the second desiccant component 20, such as heating temperature and time, to achieve a more ideal moisture removal effect. Moisture detection can quickly identify electrode 10s that have not met the drying standards, preventing unqualified electrode 10s from entering subsequent winding and processing steps, reducing rework and scrap rates in subsequent processing, and lowering production costs.

[0058] See also Figs. 1-3 As shown, in one embodiment of the present invention, the detection component 40 includes a sampling part 41 and a detection part 42. The sampling part 41 is located above the electrode sheet, and the detection part 42 is located below the electrode sheet 10. The sampling part 41 is used to cut electrode sheet samples online. The sampling part 41 can be a laser cutter, a mechanical cutter, or an ultrasonic cutter, etc. The detection part 42 can be a water content analyzer that uses the Karl Fischer method to determine the water content.

[0059] In one embodiment, the heating element 244 is a radiator that emits infrared rays to heat the electrode 10, quickly removing moisture from the electrode 10. It can also control the temperature of the electrode 10 inside the housing 241 at 100±3℃ by taking advantage of the low heat loss and easy and precise temperature control of infrared radiation.

[0060] After being rolled by the roller pressing section 23, the electrode 10 enters the chamber 241. When the electrode (positive electrode or negative electrode) enters the chamber 241, the moisture stored in the auxiliary material absorbs infrared rays to obtain energy, and begins to self-heat, vibrate, and break free from the binding of the substances in the auxiliary material on the water molecules. At the same time, the multiple first rollers 231 in the chamber 241 increase the time the electrode is in the chamber, improve the baking effect, and thus achieve the purpose of drying the electrode.

[0061] In the prior art, after the rolled electrode sheets are wound up, the inner and outer rings of the electrode sheet roll are subject to different constraints, resulting in inconsistent rebound effects after natural placement. This leads to differences in the thickness of the inner and outer rings of the electrode sheet roll. In this application, the electrode sheet roll is unwound by the unwinding section 21 during the drying process, achieving unwinding and drying of the electrode sheet roll. Unwinding and drying can ensure the consistency of thickness rebound after the electrode sheets are wound up, which not only greatly helps to improve the consistency of cell performance, but also solves the problem of the long rebound time required after the electrode sheets are rolled up.

[0062] In addition, the electrode 10 can not only accelerate stress release, shorten electrode production time, and increase production line cycle time after being heated, but also achieve rapid drying of the electrode, reduce the time required for baking before liquid injection after assembly, and reduce the time required for electrode rebound after rolling, which can effectively improve production cycle time.

[0063] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: The device includes an unwinding section, a winding section, a rolling section, a first dehydration component, and a second dehydration component. The unwinding section releases the coated electrode roll. The unwound electrode first passes through the first dehydration component, where it performs a first baking to remove most of the moisture. The electrode after initial dehydration is then conveyed to the rolling section, which rolls the electrode to adjust its thickness and increase its density, ensuring the performance and consistency of the battery cell. The electrode after rolling is then conveyed to the second dehydration component, which performs a second baking. The microstructure of the rolled electrode has changed; this second baking more effectively removes residual moisture from the electrode. The electrode dehydration device of this application can perform a first baking after electrode coating and a second baking after rolling, thereby removing moisture from the electrode more thoroughly before the electrode is wound up. The electrode dehydration effect is better, which reduces the vacuum baking time required before liquid injection after assembly. This not only improves the dehydration efficiency, but also reduces the waiting time on the production line, thereby shortening the entire battery production cycle.

[0064] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dewatering device for electrodes, characterized in that, include: Unwinding section (21); Collection Section (22); The first dewatering component is disposed between the unwinding section (21) and the winding section (22), and the first dewatering component is used to bake the coated electrode sheet (10); The roller pressing section (23) is disposed between the unwinding section (21) and the winding section (22) and is located downstream of the first dewatering assembly; The second dewatering component (20) is located between the rolling section (23) and the winding section (22). The second dewatering component (20) is disposed at the discharge end of the rolling section (23). The second dewatering component (20) is used to perform secondary baking on the electrode sheet (10) after it has been rolled by the rolling section (23).

2. The electrode dewatering device according to claim 1, characterized in that, The second dewatering component (20) includes a housing (241) and a heating structure. The housing (241) is provided with an inlet (242) and an outlet (243). The heating structure is disposed inside the housing (241).

3. The electrode dewatering device according to claim 2, characterized in that, The heating structure includes multiple heating elements (244), and at least one of the top wall, bottom wall and side wall of the housing (241) is provided with multiple heating elements (244); and / or, the electrode dewatering device further includes a temperature measuring device (30) and a control unit, the temperature measuring device (30) is installed inside the housing (241), and both the temperature measuring device (30) and the heating structure are communicatively connected to the control unit.

4. The electrode dewatering device according to claim 2, characterized in that, The second dewatering assembly (20) also includes a plurality of first rollers (245), which are arranged alternately at different heights in the housing (241) along the conveying direction of the electrode (10).

5. The electrode dewatering device according to claim 4, characterized in that, The first group of first rollers (245) of the plurality of first rollers (245) is located at the top of the housing (241), and the second group of first rollers (245) of the plurality of first rollers (245) is located at the bottom of the housing (241). Both the first group of first rollers (245) and the second group of first rollers (245) include a plurality of first rollers (245). In the first group of first rollers (245), the height of the two first rollers (245) located at both ends is greater than the height of the remaining first rollers (245).

6. The electrode dewatering device according to any one of claims 2 to 4, characterized in that, The electrode dewatering device also includes a cooling structure, which is located at the discharge port (243).

7. The electrode dewatering device according to any one of claims 2 to 4, characterized in that, The housing (241) is also provided with an air inlet (246). The electrode dehydration device also includes an air supply unit (80) and a delivery pipeline (90). The air supply unit (80) is used to provide dry compressed air. One end of the delivery pipeline (90) is connected to the air outlet of the air supply unit (80), and the other end of the delivery pipeline (90) is connected to the air inlet (246).

8. The electrode dewatering device according to claim 7, characterized in that, The air inlet (246) is located at the top of the housing (241); and / or, a fan is provided inside the housing (241).

9. The electrode dewatering device according to any one of claims 2 to 4, characterized in that, The electrode dewatering device further includes at least two tensioning units (60), with at least one tensioning unit (60) disposed between the unwinding section (21) and the rolling section (23), and at least one tensioning unit (60) disposed between the housing (241) and the winding section (22); and / or, the electrode dewatering device further includes a thickness detection structure (50), which is disposed at the discharge port (243).

10. The electrode dewatering device according to any one of claims 2 to 4, characterized in that, The electrode dehydration device further includes a detection component (40), which is disposed between the housing (241) and the winding section (22). The detection component (40) is used to detect the water content of the electrode (10) after it has been baked by the second dehydration component (20).

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