A type of electrode sheet conveying equipment

Abstract

This utility model belongs to the field of battery manufacturing technology and discloses an electrode strip conveying device, which includes two spaced-apart conveying rollers, a first smoothing component, and a second smoothing component. The conveying rollers are used to convey the strip. The first and second smoothing components are spaced apart between the two conveying rollers along the conveying direction of the strip. The first smoothing component includes at least two first smoothing rollers, which abut against two oppositely arranged surfaces of the strip. The second smoothing component includes at least two second smoothing rollers, which abut against two oppositely arranged surfaces of the strip. The rotational speed of the first smoothing rollers is less than that of the second smoothing rollers. This electrode strip conveying device can effectively prevent strip offset caused by edge warping, shaking, or inconsistency, effectively stabilize the double-sided alignment or detection accuracy of the electrode, and reduce detection inaccuracies caused by strip edge warping.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing equipment technology, and in particular to an electrode material conveying device. Background Technology

[0002] During the conveying process of the electrode strip by the conveyor rollers, it needs to undergo correction detection to ensure the stability of the conveying position. However, the strip area between the two conveyor rollers is affected by tension and gravity, and the edge of the strip is prone to warping. Once warped, the accuracy of subsequent correction detection will be reduced, and the stability of the corresponding strip conveying position cannot be guaranteed. Utility Model Content

[0003] The purpose of this invention is to provide an electrode strip conveying device that can effectively prevent strip offset caused by edge warping, shaking, or inconsistency, effectively stabilize the alignment of the two sides of the electrode or the detection accuracy, and reduce the detection inaccuracy caused by edge warping of the strip.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An electrode strip conveying device includes: two spaced-apart conveying rollers for conveying a strip; a first smoothing component and a second smoothing component, the first smoothing component and the second smoothing component being spaced apart between the two conveying rollers along the conveying direction of the strip; the first smoothing component includes at least two first smoothing rollers, the at least two first smoothing rollers abutting against two oppositely arranged surfaces of the strip; the second smoothing component includes at least two second smoothing rollers, the at least two second second smoothing rollers abutting against two oppositely arranged surfaces of the strip; wherein the rotational speed of the first smoothing rollers is less than the rotational speed of the second smoothing rollers.

[0006] The beneficial effects of the electrode strip conveying device of this utility model are as follows: Since a first smoothing component and a second smoothing component are set between the two conveying rollers of the conveying strip, the first smoothing roller and the second smoothing roller can smooth the edges of the conveying strip during the conveying process. Moreover, the rotation speed of the second smoothing roller is greater than that of the first smoothing roller. At the same time as the roller smoothing, a pulling force can be generated on the strip between the first smoothing component and the second smoothing component. This makes the edges of the strip smoothed by the first smoothing component and the second smoothing component remain flat and do not warp under the pulling force, thereby effectively stabilizing the double-sided alignment or detection accuracy of the electrode and reducing the detection inaccuracy caused by the warping of the strip edges.

[0007] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the electrode sheet conveying device according to an embodiment of the present invention;

[0009] Figure 2 This is a schematic diagram of the arrangement of the first smoothing roller and the second smoothing roller according to the present invention.

[0010] Figure 3 This is a schematic diagram of the second arrangement of the first and second smoothing rollers according to the present invention.

[0011] Figure 4 This is a schematic diagram of the third arrangement of the first and second smoothing rollers of this utility model;

[0012] Figure 5 This is a schematic diagram of the fourth arrangement of the first and second smoothing rollers of this utility model.

[0013] Figure label:

[0014] 100, Conveyor roller; 200, First smoothing assembly; 210, First smoothing roller; 300, Second smoothing assembly; 310, Second smoothing roller; 400, First support; 500, Second support; 600, First drive mechanism; 700, Second drive mechanism; 800, Detection device; 10, Material belt; 101, First side; 102, Second side. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0016] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0018] This utility model discloses an electrode sheet conveying device, referenced... Figures 1-5 As shown, the electrode strip conveying device includes two spaced-apart conveying rollers 100, a first smoothing component 200, and a second smoothing component 300. The conveying rollers 100 are used to convey the strip 10. The first smoothing component 200 and the second smoothing component 300 are spaced-apart between the two conveying rollers 100 along the conveying direction of the strip 10. The first smoothing component 200 includes at least two first smoothing rollers 210, which abut against two oppositely arranged surfaces of the strip 10. The second smoothing component 300 includes at least two second smoothing rollers 310, which abut against two oppositely arranged surfaces of the strip 10. The rotational speed of the first smoothing rollers 210 is less than the rotational speed of the second smoothing rollers 310. Understandably, in actual operation, since a first smoothing component 200 and a second smoothing component 300 are set between the two conveyor rollers 100 of the conveyor belt 10, the first smoothing roller 210 and the second smoothing roller 310 can smooth the edges of the conveyor belt 10 during the conveying process. Moreover, the rotation speed of the second smoothing roller 310 is greater than that of the first smoothing roller 210. It can generate a pulling force on the conveyor belt 10 between the first smoothing component 200 and the second smoothing component 300 while smoothing it with roller pressing. This allows the edges of the conveyor belt 10 smoothed by the first smoothing component 200 and the second smoothing component 300 to remain flat and not warped under the pulling force, thereby effectively stabilizing the double-sided alignment of the electrode or the detection accuracy and reducing the detection inaccuracy caused by the warping of the edges of the conveyor belt 10.

[0019] Optionally, the surfaces of the first smoothing roller 210 and / or the second smoothing roller 310 are coated with tungsten carbide to increase their wear resistance and smoothness, with a roundness accuracy within 1.5 μm to ensure their smoothing effect.

[0020] Optionally, the first smoothing roller 210 and / or the second smoothing roller 310 can be made into a micro-conical shape with fine threads, providing external rolling capability, thereby meeting the special smoothing needs of the material strip 10.

[0021] Optionally, the first smoothing roller 210 is rotatably mounted on the first bracket 400, and the spacing between the first smoothing rollers 210 on both sides of the material belt 10 is adjusted by inserting wedge blocks between the two first brackets 400 on both sides of the material belt 10. This allows for convenient adjustment of the spacing between the first smoothing rollers 210 on both sides of the material belt 10.

[0022] Optional, see reference Figure 1 As shown, the second smoothing roller 310 is rotatably mounted on the second bracket 500. The distance between the second smoothing rollers 310 on both sides of the material belt 10 is adjusted by inserting wedge blocks between the two second brackets 500 on both sides of the material belt 10. Thus, the distance between the second smoothing rollers 310 on both sides of the material belt 10 can be easily adjusted.

[0023] refer to Figure 2 As shown, in a specific embodiment, there are two first smoothing rollers 210, which abut against two oppositely arranged surfaces of the material strip 10; there are also two second smoothing rollers 310, which abut against two oppositely arranged surfaces of the material strip 10. It can be understood that during actual operation, the material strip 10 is clamped between the two first smoothing rollers 210 and the two second smoothing rollers 310. When the first and second smoothing rollers 210 and 310 rotate, they can effectively compress the edges of the material strip 10, thereby ensuring a smoothing effect on the edges of the material strip 10.

[0024] refer to Figure 3 As shown, in another specific embodiment, there are three first smoothing rollers 210: two first smoothing rollers 210 are located on the first side 101 of the material strip 10, and one first smoothing roller 210 is located on the second side 102 of the material strip 10; there are also three second smoothing rollers 310: two second smoothing rollers 310 are located on the second side 102 of the material strip 10, and one second smoothing roller 310 is located on the first side 101 of the material strip 10. It can be understood that the three first smoothing rollers 210 of the first smoothing assembly 200 form a triangular positioning smoothing structure, and the three second smoothing rollers 310 of the second smoothing assembly 300 form a triangular positioning smoothing structure, which provides a better smoothing effect. Furthermore, the triangular positioning smoothing structure formed by the three first smoothing rollers 210 and the triangular positioning smoothing structure formed by the three second smoothing rollers 310 are arranged in opposite directions, which is beneficial for straightening the curved edges of the material strip 10, thereby further improving the smoothing effect.

[0025] Of course, in another alternative embodiment, such as Figure 4As shown, there are three first smoothing rollers 210, with two first smoothing rollers 210 located on the second side 102 of the material belt 10 and one first smoothing roller 210 located on the first side 101 of the material belt 10; there are three second smoothing rollers 310, with two second smoothing rollers 310 located on the first side 101 of the material belt 10 and one second smoothing roller 310 located on the second side 102 of the material belt 10.

[0026] In yet another alternative embodiment, such as Figure 5 As shown, there are three first smoothing rollers 210, with two first smoothing rollers 210 located on the second side 102 of the material belt 10 and one first smoothing roller 210 located on the first side 101 of the material belt 10; there are three second smoothing rollers 310, with two second smoothing rollers 310 located on the second side 102 of the material belt 10 and one second smoothing roller 310 located on the first side 101 of the material belt 10.

[0027] It should be further noted that, in other embodiments of this utility model, the number and arrangement of the first smoothing rollers 210 in the first smoothing component 200 and the number and arrangement of the second smoothing rollers 310 in the second smoothing component 300 can be selected according to actual needs and are not limited to the above. Figures 2-5 The structure.

[0028] Optionally, the center of one of the first smoothing rollers 210 on one side of the material belt 10 is located between the centers of the two first smoothing rollers 210 on the other side of the material belt 10. This facilitates the straightening of the bent edges of the material belt 10, thereby further improving the smoothing effect. More optionally, the center of one of the first smoothing rollers 210 on one side of the material belt 10 is located on the perpendicular bisector of the line connecting the centers of the two first smoothing rollers 210 on the other side of the material belt 10.

[0029] Optionally, the center of one second smoothing roller 310 on one side of the material belt 10 is located between the centers of the two second smoothing rollers 310 on the other side of the material belt 10. This facilitates the straightening of the bent edges of the material belt 10, thereby further improving the smoothing effect. More optionally, the center of one second smoothing roller 310 on one side of the material belt 10 is located on the perpendicular bisector of the line connecting the centers of the two second smoothing rollers 310 on the other side of the material belt 10.

[0030] Optional, see reference Figures 3-5 As shown, the center distance a1 between the two first smoothing rollers 210 located on the same side is greater than the center distance b1 between the two first smoothing rollers 210 located on opposite sides. This facilitates the straightening of the bent edges of the material strip 10, thereby further improving the smoothing effect.

[0031] Optional, see reference Figures 3-5As shown, the center distance a2 between the two second smoothing rollers 310 located on the same side is greater than the center distance b2 between the two second smoothing rollers 310 located on opposite sides. This facilitates the straightening of the bent edges of the material strip 10, thereby further improving the smoothing effect.

[0032] Optionally, there are two first smoothing components 200, symmetrically arranged along the width direction of the material belt 10; and two second smoothing components 300, symmetrically arranged along the width direction of the material belt 10. It is understood that by setting the first smoothing components 200 and the second smoothing components 300 on both sides of the material belt 10, and performing smoothing and pulling operations simultaneously, the force on the material belt 10 can be more balanced, avoiding unstable transmission caused by uneven tension on one side.

[0033] Optionally, a plurality of first smoothing rollers 210 are provided on one side of the material belt 10 (which can be either the first side 101 or the second side 102), and the plurality of first smoothing rollers 210 are connected to a first drive mechanism 600. It should be noted that with a plurality of first smoothing rollers 210 provided on one side of the material belt 10, the distance between adjacent first smoothing rollers 210 is relatively close. If the speeds are inconsistent, one of the first smoothing rollers 210 is prone to relative sliding with the material belt 10, resulting in a decrease in the smoothing or pulling effect. In this embodiment, the plurality of first smoothing rollers 210 share the same first drive mechanism 600, which ensures the consistency of movement of the plurality of first smoothing rollers 210, thereby preventing the first smoothing rollers 210 from sliding relative to the material belt 10 and ensuring the smoothing or pulling effect. It should be noted that the first drive mechanism 600 may include a drive motor and a gear assembly, the gear assembly including a plurality of gears, each gear cooperating with a roller of one of the first smoothing rollers 210. Of course, the first drive mechanism 600 may include a drive motor and a synchronous belt assembly. The synchronous belt assembly includes a synchronous belt and synchronous pulleys, one of which is connected to the drive shaft of the drive motor, and the other synchronous pulleys cooperate with the rollers of the first smoothing roller 210. The structural form of the first drive mechanism 600 can be selected according to actual needs and is not limited to the above description.

[0034] Optionally, a plurality of second smoothing rollers 310 are provided on one side of the material belt 10 (which can be either the first side 101 or the second side 102), and the plurality of second smoothing rollers 310 are connected to a second drive mechanism 700. It should be noted that with a plurality of second smoothing rollers 310 on one side of the material belt 10, the distance between adjacent second smoothing rollers 310 is relatively close. If the speeds are inconsistent, one of the second smoothing rollers 310 is prone to relative sliding with the material belt 10, resulting in a decrease in the smoothing or pulling effect. In this embodiment, the plurality of second smoothing rollers 310 share the same second drive mechanism 700, which ensures the consistency of movement of the plurality of second smoothing rollers 310, thereby preventing the second smoothing rollers 310 from sliding relative to the material belt 10 and ensuring the smoothing or pulling effect. It should be noted that the second drive mechanism 700 may include a drive motor and a gear assembly, the gear assembly including a plurality of gears, each gear cooperating with a roller of one of the second smoothing rollers 310. Of course, the second drive mechanism 700 may include a drive motor and a synchronous belt assembly. The synchronous belt assembly includes a synchronous belt and synchronous pulleys, one of which is connected to the drive shaft of the drive motor, and the other synchronous pulleys cooperate with the rollers of the second smoothing roller 310. The structural form of the second drive mechanism 700 can be selected according to actual needs and is not limited to the above description.

[0035] Optional, see reference Figure 1As shown, a plurality of first smoothing rollers 210 are provided on one side of the material strip 10 (which can be either the first side 101 or the second side 102). The center distance between two adjacent first smoothing rollers 210 is L1, and the diameter of the first smoothing roller 210 is D1, where 0.3≤D1 / L1≤0.7. Specifically, the diameter D1 of the first smoothing roller 210 and the center distance L1 between two adjacent first smoothing rollers 210 can be 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, or 0.7. Of course, other values ​​between 0.3 and 0.7 are also possible, and the examples above are not limited to those mentioned above. It is understandable that if the center distance is too large, the two first smoothing rollers 210 cannot cooperate to achieve a smoothing effect; if the center distance is too small, the two first smoothing rollers 210 will rub against each other, exacerbating wear. In this embodiment, the ratio of the diameter of the first smoothing roller 210 to the center distance is controlled within the range of 0.3-0.7. This ensures that there is a gap between the two first smoothing rollers 210, preventing wear between them, while also ensuring that the two first smoothing rollers 210 cooperate to achieve a smoothing effect.

[0036] Optional, see reference Figure 1 As shown, a plurality of second smoothing rollers 310 are provided on one side of the material strip 10 (which can be either the first side 101 or the second side 102). The center distance between two adjacent second smoothing rollers 310 is L2, and the diameter of the second smoothing roller 310 is D2, where 0.3≤D2 / L2≤0.7. Specifically, the diameter D1 of the second smoothing roller 310 and the center distance L1 between two adjacent second smoothing rollers 310 can be 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, or 0.7. Of course, other values ​​between 0.3 and 0.7 are also possible, and the examples above are not limited to those mentioned above.

[0037] Understandably, if the center distance is too large, the two second smoothing rollers 310 cannot cooperate to achieve a smoothing effect; if the center distance is too small, the two second smoothing rollers 310 will rub against each other, aggravating wear. In this embodiment, the ratio of the diameter of the second smoothing roller 310 to the center distance is controlled within the range of 0.3-0.7. This ensures that there is a gap between the two second smoothing rollers 310 to avoid wear between them, while also ensuring that the two second smoothing rollers 310 cooperate to achieve a smoothing effect.

[0038] It should be noted that the center distance L1 between two adjacent first smoothing rollers 210, the diameter D1 of the first smoothing roller 210, the center distance L2 between two adjacent second smoothing rollers 310, and the diameter D2 of the second smoothing roller 310 are all in mm.

[0039] Optionally, the distance h between the first smoothing component 200 and the second smoothing component 300 along the conveying direction of the conveyor belt 10 is 20mm-150mm. Specifically, the distance h between the first smoothing component 200 and the second smoothing component 300 can be 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm. Of course, other values ​​within the range of 20mm-150mm are also possible, and are not limited to the examples mentioned above. It is understandable that the larger the distance between the first smoothing component 200 and the second smoothing component 300, the greater the tensile force required to ensure the smoothness of the edge of the conveyor belt 10; however, excessive tensile force will damage the quality of the conveyor belt 10. In this embodiment, the distance h between the first smoothing component 200 and the second smoothing component 300 is controlled within the range of 20mm-150mm. This ensures that there is sufficient and appropriate traction between the first smoothing component 200 and the second smoothing component 300, which can both ensure the smoothing effect and avoid damage to the material strip 10.

[0040] Optionally, the rotational speed of the first smoothing roller 210 is the same as that of the conveyor roller 100, and the ratio of the rotational speed of the second smoothing roller 310 to that of the conveyor roller 100 is 1.05-1.2. It is understood that if the rotational speed of the second smoothing roller 310 is too low, the tension force on the material strip 10 is insufficient, and the edges of the material strip 10 are still prone to warping; if the rotational speed of the second smoothing roller 310 is too high, the tension force on the material strip 10 is excessive, which can easily damage the material strip 10, leading to problems such as tensile deformation or cracks. In this embodiment, setting the ratio of the rotational speed of the second smoothing roller 310 to that of the conveyor roller 100 to 1.05-1.2 ensures sufficient and appropriate traction between the first smoothing component 200 and the second smoothing component 300, ensuring both smoothing effect and preventing damage to the material strip 10. Alternatively, the ratio of the rotational speed of the second smoothing roller 310 to the rotational speed of the conveying roller 100 can be 1.05, 1.06, 1.07, 1.08, 1.09, 1.1, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, or 1.2. Of course, other values ​​can be selected according to actual needs, and are not limited to the examples above.

[0041] Optionally, the electrode strip conveying equipment also includes a detection device 800, which is installed between the first smoothing assembly 200 and the second smoothing assembly 300. It is understood that the detection device 800 is used to detect the condition of the edge of the strip 10 between the first smoothing roller 210 and the second smoothing roller 310. When the edge of the strip 10 still shows warping, it can promptly notify the operator to adjust the first smoothing assembly 200 and the second smoothing assembly 300. Further optionally, the detection device 800 is a laser. Of course, in other embodiments of this invention, the detection device 800 can also be selected with other structures according to actual needs.

[0042] Optionally, the overlap distance between the first smoothing roller 210 and the material belt 10 along the width direction is 80mm-300mm. Specifically, the overlap distance between the first smoothing roller 210 and the material belt 10 can be 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 110mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 210mm, 260mm, 270mm, 280mm, 290mm, or 300mm. Of course, other values ​​within the range of 80mm-300mm are also possible, and are not limited to the examples mentioned above. Understandably, if the overlap distance between the first smoothing roller 210 and the material belt 10 is too small, the smoothing area of ​​the first smoothing roller 210 on the material belt 10 will be small during the conveying process, reducing the smoothing effect. If the overlap distance is too large, the smoothing area of ​​the first smoothing roller 210 on the material belt 10 will be large during the conveying process, reducing the overall thickness of the material belt 10 and increasing the probability of damage to the material belt 10. In this embodiment, controlling the overlap distance between the first smoothing roller 210 and the material belt 10 within the range of A5-A6 ensures that the smoothing area of ​​the first smoothing roller 210 on the material belt 10 is moderate during the conveying process, ensuring the smoothing effect while reducing the probability of damage to the material belt 10.

[0043] Optionally, the overlap distance between the second smoothing roller 310 and the material strip 10 along the width direction is 80mm-300mm. The overlap distance between the second smoothing roller 310 and the material strip 10 can be 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 110mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 210mm, 260mm, 270mm, 280mm, 290mm, or 300mm. Of course, other values ​​within the range of 80mm-300mm are also possible, and are not limited to the examples mentioned above. Understandably, if the overlap distance between the second smoothing roller 310 and the material belt 10 is too small, the smoothing area of ​​the second smoothing roller 310 on the material belt 10 will be small during the conveying process, reducing the smoothing effect. If the overlap distance is too large, the smoothing area of ​​the second smoothing roller 310 on the material belt 10 will be large during the conveying process, reducing the overall thickness of the material belt 10 and increasing the probability of damage to the material belt 10. In this embodiment, controlling the overlap distance between the second smoothing roller 310 and the material belt 10 within the range of A5-A6 ensures that the smoothing area of ​​the second smoothing roller 310 on the material belt 10 is moderate during the conveying process, ensuring the smoothing effect while reducing the probability of damage to the material belt 10.

[0044] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sheet conveying device, characterized in that, include: Two spaced-apart conveyor rollers (100) are used to convey the material belt (10); A first smoothing assembly (200) and a second smoothing assembly (300) are arranged at intervals between two conveying rollers (100) along the conveying direction of the material belt (10). The first smoothing assembly (200) includes at least two first smoothing rollers (210), which abut against two oppositely arranged surfaces of the material belt (10). The second smoothing assembly (300) includes at least two second smoothing rollers (310), which abut against two oppositely arranged surfaces of the material belt (10). The rotational speed of the first smoothing rollers (210) is less than that of the second smoothing rollers (310).

2. The electrode sheet conveying device according to claim 1, characterized in that, There are two first smoothing rollers (210), and the two first smoothing rollers (210) abut against two oppositely arranged surfaces of the material strip (10); and / or, There are two second smoothing rollers (310), and the two second smoothing rollers (310) abut against two oppositely arranged surfaces of the material strip (10).

3. The electrode sheet conveying device according to claim 1, characterized in that, There are three first smoothing rollers (210), two of which are located on the first side (101) of the strip (10), and one of which is located on the second side (102) of the strip (10); and / or, There are three second smoothing rollers (310), two of which are located on the second side (102) of the strip (10) and one of which is located on the first side (101) of the strip (10).

4. The electrode sheet conveying device according to claim 1, characterized in that, There are three first smoothing rollers (210), two of which are located on the second side (102) of the strip (10), and one of which is located on the first side (101) of the strip (10); and / or, There are three second smoothing rollers (310), two of which are located on the first side (101) of the strip (10) and one of which is located on the second side (102) of the strip (10).

5. The electrode sheet conveying device according to claim 3 or 4, characterized in that, The center of one of the first smoothing rollers (210) on one side of the strip (10) is located between the centers of the two first smoothing rollers (210) on the other side of the strip (10); and / or, The center of one of the second smoothing rollers (310) on one side of the strip (10) is located between the centers of the two second smoothing rollers (310) on the other side of the strip (10).

6. The electrode sheet conveying device according to claim 3 or 4, characterized in that, The center distance a1 between the two first smoothing rollers (210) located on the same side is greater than the center distance b1 between the two first smoothing rollers (210) located on opposite sides; and / or, The center distance a1 between the two second smoothing rollers (310) located on the same side is greater than the center distance b2 between the two second smoothing rollers (310) located on opposite sides.

7. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, There are two first smoothing components (200), and the two first smoothing components (200) are symmetrically arranged along the width direction of the strip (10); There are two second smoothing components (300), and the two second smoothing components (300) are arranged symmetrically along the width direction of the strip (10).

8. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, A plurality of first smoothing rollers (210) are provided on one side of the material strip (10), and the plurality of first smoothing rollers (210) are connected to a first drive mechanism (600); and / or, A plurality of second smoothing rollers (310) are provided on one side of the material strip (10), and the plurality of second smoothing rollers (310) are connected to a second drive mechanism (700).

9. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, A plurality of first smoothing rollers (210) are provided on one side of the material strip (10), the center distance between two adjacent first smoothing rollers (210) is L1, the diameter of the first smoothing roller (210) is D1, 0.3≤D1 / L1≤0.7; and / or; A plurality of second smoothing rollers (310) are provided on one side of the material strip (10), the center distance between two adjacent second smoothing rollers (310) is L2, the diameter of the second smoothing roller (310) is D2, 0.3≤D2 / L2≤0.7; wherein, the units of L1, L2, D1 and D2 are all mm.

10. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, Along the transmission direction of the material belt (10), the distance h between the first smoothing component (200) and the second smoothing component (300) is 20mm-150mm.

11. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, The rotational speed of the first smoothing roller (210) is the same as that of the conveying roller (100), and the ratio of the rotational speed of the second smoothing roller (310) to that of the conveying roller (100) is 1.05-1.

2.

12. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, It also includes a detection device (800) installed between the first smoothing component (200) and the second smoothing component (300).

13. The electrode sheet conveying device according to any one of claims 1-4, characterized in that, Along the width direction of the material strip (10), the overlap distance c1 between the first smoothing roller (210) and the material strip (10) is 80mm-300mm; and / or, Along the width direction of the material strip (10), the overlap distance c2 between the second smoothing roller (310) and the material strip (10) is 80mm-300mm.

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