Pole piece surface processing device

Abstract

The utility model discloses a pole piece surface processing device, which relates to the technical field of battery production equipment, and comprises a rack, a plurality of pole pieces and a plurality of pole pieces, the driving roller is rotationally arranged on the rack; the driving roller is arranged on the rack, the pressing rollers are rotationally arranged on the rack, each pressing roller and the driving roller are arranged in a spaced mode to form a mark making gap, the sizes of the multiple mark making gaps are in a decreasing trend in the first circumferential direction of the driving roller, and mark making structures are arranged on the outer circumferential wall of the driving roller and / or the outer circumferential walls of the pressing rollers; wherein the pole piece is wound on the driving roller in the direction that the mark making gaps are reduced and sequentially passes through the multiple mark making gaps, and the driving roller and any pressing roller clamp the two opposite sides of the pole piece so that mark making can be conducted on the pole piece through the mark making structure. According to the technical scheme provided by the utility model, the consistency of pole piece surface processing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a pole piece surface processing device. Background Art

[0002] With the widespread use of lithium batteries, higher requirements have been placed on the charge and discharge rates of lithium batteries. Under the condition that the volume of lithium batteries is certain, in order to increase the charge and discharge rate, the battery electrodes need to be micro-processed to artificially create lithium ion channels.

[0003] There is a conventional pole piece surface processing device, which comprises two pattern rollers arranged up and down, and the two pattern rollers are pressed up and down to perform marking operations such as punching or scribing on the pole piece in the middle.

[0004] However, the consistency of the pole piece surface processed by this pole piece surface processing device is poor. Utility Model Content

[0005] The main purpose of the utility model is to provide a pole piece surface processing device, aiming to improve the consistency of pole piece surface processing.

[0006] In order to achieve the above-mentioned purpose, the pole piece surface processing device proposed in the utility model comprises:

[0007] frame;

[0008] A driving roller rotatably mounted on the frame; and

[0009] A pressure roller is rotatably arranged on the frame, and a plurality of pressure rollers are provided, each of the pressure rollers is spaced apart from the active roller to form a marking gap, and the sizes of the plurality of marking gaps tend to decrease along the first circumferential direction of the active roller, and a marking structure is provided on the outer peripheral wall of the active roller and / or the outer peripheral wall of the pressure roller;

[0010] The pole piece is wound around the active roller along the direction in which the marking gap decreases and passes through multiple marking gaps in sequence. The active roller and any of the pressure rollers clamp the opposite sides of the pole piece to mark the pole piece through the marking structure.

[0011] In one embodiment, the frame comprises:

[0012] A first bracket, the driving roller is rotatably mounted on the first bracket; and

[0013] The second bracket is slidably arranged on the first bracket, and each pressing roller is correspondingly provided with a second bracket. The pressing roller is rotatably arranged on the corresponding second bracket, and the size of the marking gap formed by the corresponding pressing roller and the active roller is adjusted by sliding the second bracket.

[0014] In one embodiment, the pole piece surface processing device further includes a first driving component, each second bracket is provided with at least one first driving component, the first driving component is provided on the first bracket and drives the corresponding second bracket to drive the second bracket to slide linearly.

[0015] In one embodiment, the second bracket includes a support member and two connecting members arranged at both ends of the support member, the first driving assembly is drivingly connected to the support member, and both ends of the pressure roller are rotationally connected to the two connecting members in a one-to-one correspondence.

[0016] In one embodiment, the pole piece surface processing device further includes a guide structure, and the guide structure connects the first bracket and the second bracket to limit the sliding direction of the second bracket.

[0017] In one embodiment, the guide structure includes a guide groove and a guide protrusion, one of the first bracket and the second bracket is provided with the guide groove, and the other of the first bracket and the second bracket is provided with the guide protrusion corresponding to the guide groove, and the guide protrusion slides relatively in the guide groove to limit the sliding direction of the second bracket.

[0018] In one embodiment, the pole piece surface processing device includes two pressing rollers, and the two pressing rollers are arranged on opposite sides of the active roller.

[0019] In one embodiment, the axis of the active roller and the axes of the two pressure rollers are located in the same horizontal plane.

[0020] In one embodiment, the pole piece surface processing device further comprises a second driving component, which is disposed on the frame and drivingly connected to the active roller to drive the active roller to rotate.

[0021] In one embodiment, the marking structure includes a plurality of punching protrusions, the plurality of punching protrusions are arranged at intervals, and the surface of the pole piece is pressed by the plurality of punching protrusions to form a plurality of corresponding depressions on the surface of the pole piece; or,

[0022] The marking structure includes a scribing protrusion, which is configured as a protrusion with a preset line shape, and the surface of the pole piece is pressed by the scribing protrusion to form a depression corresponding to the preset line shape on the surface of the pole piece.

[0023] The pole piece surface processing device in the technical solution of the utility model includes a frame, an active roller and a pressure roller. The pole piece is wound around the outer circumference of the active roller. The active roller drives the pole piece to be continuously transported without stopping through its own rotation, thereby improving the marking efficiency. There are multiple pressure rollers, and the multiple pressure rollers are arranged along the circumference of the active roller. There is a gap between each pressure roller and the active roller, and this gap forms a marking gap. The pole piece is inserted into the marking gap. As the pole piece is transported, the marking structure squeezes the pole piece, so that a depression corresponding to the marking structure is formed on the pole piece, thereby realizing the marking operations such as punching or marking the pole piece. The sizes of the multiple marking gaps are different. When the pole piece passes through a larger marking gap, the force of the marking structure squeezing the pole piece is smaller. When the pole piece passes through a smaller marking gap, the force of the marking structure squeezing the pole piece is larger. The multiple marking gaps formed by the active roller and multiple pressure rollers tend to decrease along the first circumferential direction of the active roller. The first circumferential direction can be the clockwise direction or the counterclockwise direction around the active roller. When the pole piece passes through the multiple marking gaps along the trend of the marking gaps from large to small, not only a depression is formed on the pole piece, but also each depression is formed by multiple extrusions from light to heavy. Even if a depression is squeezed less than the preset force during this process, it can be compensated to a certain extent after the next extrusion, thereby improving the consistency of the surface of the processed pole piece. Among them, the marking structure can be set only on the pressure roller, or only on the active roller, and the surface of one side of the pole piece is single-sidedly marked; the marking structure can also be set on the pressure roller and the active roller at the same time, and the surfaces on both sides of the pole piece are double-sidedly marked at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of an embodiment of a pole piece surface processing device provided by the utility model;

[0026] Figure 2 A schematic structural diagram of another embodiment of the pole piece surface processing device provided by the utility model;

[0027] Figure 3 A schematic structural diagram of another embodiment of the pole piece surface processing device provided by the utility model;

[0028] Figure 4 A schematic structural diagram of a pressure roller and a marking structure of an embodiment of a pole piece surface processing device provided by the utility model;

[0029] Figure 5 for Figure 4 The local diagram at A in the middle;

[0030] Figure 6 A schematic structural diagram of a pressure roller and a marking structure of another embodiment of the pole piece surface processing device provided by the utility model;

[0031] Figure 7 A schematic diagram of a preset line type of a portion of the scribing protrusions of the marking structure of the pole piece surface processing device provided by the utility model.

[0032] Description of Figure Numbers:

[0033] 100, pole piece surface processing device; 110, frame; 111, first bracket; 112, second bracket; 1121, support member; 1122, connecting member; 120, active roller; 130, pressure roller; 140, marking structure; 141, punching protrusion; 142, scribing protrusion; 150, first driving assembly; 160, second driving assembly;

[0034] 200. Pole piece.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0039] In addition, if there are descriptions such as "first" and "second" in the embodiments of the utility model, the descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] There is an existing pole piece surface processing device, which includes two patterned rollers arranged up and down. The two patterned rollers are pressed up and down to perform marking operations such as punching or scoring on the middle pole piece. However, due to manufacturing errors and assembly errors, the gap between the two patterned rollers cannot be completely consistent in the axial direction, and as the patterned rollers rotate, the size of the gap at the same position in the axial direction also changes. As a result, when the two patterned rollers continuously extrude the pole piece, the depression of the pole piece has differences in the width direction and the length direction, and the consistency is poor.

[0041] The utility model provides a pole piece surface processing device.

[0042] See also Figure 1 , Figure 1 This is a structural schematic diagram of an embodiment of a pole piece surface processing device provided by the utility model.

[0043] In one embodiment of the present invention, the pole piece surface processing device 100 comprises:

[0044] Rack 110;

[0045] A driving roller 120 is rotatably mounted on the frame 110; and

[0046] A pressure roller 130 is rotatably disposed on the frame 110. A plurality of pressure rollers 130 are provided. Each pressure roller 130 is spaced apart from the active roller 120 to form a marking gap. The sizes of the plurality of marking gaps decrease along the first circumferential direction of the active roller 120. A marking structure 140 is provided on the outer peripheral wall of the active roller 120 and / or the outer peripheral wall of the pressure roller 130.

[0047] The pole piece 200 is wound around the active roller 120 along the direction in which the marking gap decreases and passes through multiple marking gaps in sequence. The active roller 120 and any pressure roller 130 clamp the opposite sides of the pole piece 200 to mark the pole piece 200 through the marking structure 140.

[0048] The pole piece surface processing device 100 in the technical solution of the utility model includes a frame 110, an active roller 120 and a pressure roller 130. The pole piece 200 is wound around the outer periphery of the active roller 120. The active roller 120 drives the pole piece 200 to be continuously transported without stopping through its own rotation, thereby improving the marking efficiency. There are multiple pressure rollers 130, and the multiple pressure rollers 130 are arranged along the circumference of the active roller 120. There is a gap between each pressure roller 130 and the active roller 120, and the gap forms a marking gap. The pole piece 200 is inserted into the marking gap. As the pole piece 200 is transported, the marking structure 140 squeezes the pole piece 200, so that a depression corresponding to the marking structure 140 is formed on the pole piece 200, thereby realizing the marking operation such as punching or scribing on the pole piece 200. The sizes of the multiple marking gaps are different. When the pole piece 200 passes through a larger marking gap, the force of the marking structure 140 squeezing the pole piece 200 is smaller. When the pole piece 200 passes through a smaller marking gap, the force of the marking structure 140 squeezing the pole piece 200 is larger. The multiple marking gaps formed by the active roller 120 and the multiple pressure rollers 130 tend to decrease along the first circumference of the active roller 120. The first circumference can be the clockwise direction or the counterclockwise direction around the active roller 120. When the pole piece 200 passes through the multiple marking gaps along the trend of the marking gaps from large to small, not only a depression is formed on the pole piece 200, but also each depression is formed by multiple extrusions from light to heavy. Even if a depression is squeezed less than the preset force during this process, it can be compensated to a certain extent after the next extrusion, thereby improving the consistency of the surface of the processed pole piece 200. Among them, the marking structure 140 can be only set on the pressure roller 130, or only set on the active roller 120, to perform single-sided marking on the surface of one side of the pole piece 200; the marking structure 140 can also be simultaneously set on the pressure roller 130 and the active roller 120, to perform double-sided marking on the surfaces of both sides of the pole piece 200 at the same time.

[0049] Compared with the laser processing marking method, the principle of laser processing in this pole piece surface processing device 100 is to eliminate the active substances on the surface of the pole piece 200 through laser to complete the required processing shape, which will cause the loss of active substances on the pole piece 200 and lead to a decrease in battery capacity. In this solution, the active substances on the surface of the pole piece 200 are squeezed by the active roller 120 and the pressure roller 130 to complete the processing, which will not cause loss of active substances on the surface of the pole piece 200 and will not affect the battery capacity. On the other hand, laser processing is limited by the size of the field mirror, and a single laser cannot process a wide pole piece 200. The pole piece surface processing device 100 in this solution can adapt to pole pieces 200 of various widths by adjusting the length of the active roller 120 and the pressure roller 130. On the other hand, laser processing is limited by the focus of the field lens, and any slight shaking of the pole piece 200 will cause fluctuations in processing quality, and the shaking of the pole piece 200 needs to be strictly controlled. In this solution, the pole piece 200 is squeezed by the pressure roller 130, and the pole piece 200 will be squeezed by the pressure roller 130 and the active roller 120 during the processing without shaking, which reduces the manufacturing difficulty. On the other hand, the speed of laser processing is limited by the laser. Generally, the processing speed of a single laser does not exceed 15m / min, and the processing speed is also limited by the complexity of the marking style. The pole piece surface processing device 100 of this solution adopts a roller pressing method, which is less restricted by the marking style and has a fast processing speed, which can generally exceed 50m / min.

[0050] In one embodiment, the rack 110 includes:

[0051] A first bracket 111, and an active roller 120 is rotatably disposed on the first bracket 111; and

[0052] The second bracket 112 is slidably disposed on the first bracket 111. Each pressing roller 130 is correspondingly provided with a second bracket 112. The pressing roller 130 is rotatably disposed on the corresponding second bracket 112. The size of the marking gap formed by the corresponding pressing roller 130 and the active roller 120 is adjusted by sliding the second bracket 112.

[0053] Reference Figure 2 In an embodiment of the utility model, the frame 110 includes a first bracket 111 and a second bracket 112, the active roller 120 is rotatably arranged on the first bracket 111, and the pressure roller 130 is arranged on the second bracket 112. The position of the pressure roller 130 can be adjusted by sliding the second bracket 112, thereby adjusting the interval between the pressure roller 130 and the active roller 120, thereby realizing the function of adjusting the size of the marking gap. On the one hand, the accuracy of each marking gap can be guaranteed by adjustment, thereby improving the accuracy of the surface processing of the pole piece 200; on the other hand, a plurality of marking gaps of different sizes can be realized by adjustment, and the manufacturing difficulty is relatively low, so that the pole piece surface processing device 100 is easy to manufacture.

[0054] In one embodiment, the pole piece surface processing device 100 also includes a first driving component 150, and each second bracket 112 is correspondingly provided with at least one first driving component 150. The first driving component 150 is arranged on the first bracket 111 and drives the corresponding second bracket 112 to drive the second bracket 112 to slide linearly.

[0055] Reference Figure 2 In an embodiment of the utility model, the pole piece surface processing device 100 further includes a first driving assembly 150, and each second bracket 112 can be driven by one first driving assembly 150, or can be driven synchronously by multiple first driving assemblies 150. The first driving assembly 150 can be in the form of a linear motor or a cylinder, etc., to drive the second bracket 112 to slide linearly, thereby driving the pressure roller 130 to slide, and then adjusting the size of the marking gap between the pressure roller 130 and the active roller 120. By setting the first driving assembly 150 to drive the second bracket 112 to slide linearly, on the one hand, the moving accuracy of the pressure roller 130 can be improved, thereby improving the accuracy of the marking gap, and then improving the accuracy of the surface processing of the pole piece 200; on the other hand, it can reduce the manual operation in the process of adjusting the marking gap, and improve the convenience of use of the pole piece surface processing device 100.

[0056] In one embodiment, the second bracket 112 includes a support member 1121 and two connecting members 1122 disposed at both ends of the support member 1121 . The first driving assembly 150 drives the connected support member 1121 , and both ends of the pressure roller 130 are rotationally connected to the two connecting members 1122 in a one-to-one correspondence.

[0057] Reference Figure 2 In the embodiment of the utility model, the second bracket 112 includes a support member 1121 and a connecting member 1122. A connecting member 1122 is provided at each end of the support member 1121. One end of the connecting member 1122 is fixed to the end of the support member 1121. The other end of the connecting member 1122 extends in a direction away from the support member 1121. The two ends of the pressure roller 130 are rotatably arranged on the ends of the two connecting members 1122 away from the support member 1121. The first driving assembly 150 drives the support member 1121 to move linearly. The support member 1121 drives the two connecting members 1122 to move linearly, and then drives the pressure roller 130 to move linearly, so that the pressure roller 130 is close to or away from the active roller 120. The second bracket 112 has a simple structure, is easy to manufacture, and has a low production cost.

[0058] In one embodiment, the pole piece surface processing device 100 further includes a guide structure, which connects the first bracket 111 and the second bracket 112 to limit the sliding direction of the second bracket 112 .

[0059] In the embodiment of the utility model, a guide structure is further provided between the first bracket 111 and the second bracket 112, and the sliding direction of the second bracket 112 relative to the first bracket 111 can be limited by the guide structure, and the possibility of the second bracket 112 sliding crooked can be reduced, thereby improving the movement accuracy of the second bracket 112, and further ensuring the accuracy of the marking gap. The guide structure can be a combination of a slide rail and a slide groove, for example, a slide rail is provided on the first bracket 111, and a corresponding slide groove is provided on the second bracket 112, and the slide groove is clamped on the slide rail so that the second bracket 112 moves along the slide rail; the guide structure can also be a combination of a roller and a rolling groove, for example, a rolling groove is provided on the first bracket 111, and a roller is provided on the second bracket 112, and the roller rolls along the rolling groove in the rolling groove so that the second bracket 112 slides relative to the first bracket 111.

[0060] In one embodiment, the guide structure includes a guide groove and a guide protrusion. One of the first bracket 111 and the second bracket 112 is provided with a guide groove, and the other corresponding guide groove in the first bracket 111 and the second bracket 112 is provided with a guide protrusion. The guide protrusion slides relatively in the guide groove to limit the sliding direction of the second bracket 112.

[0061] In the embodiment of the utility model, the guide structure includes a guide groove and a guide protrusion. The guide groove can be provided on the first bracket 111, and the guide protrusion can be provided on the second bracket 112 accordingly; or the guide groove can be provided on the second bracket 112, and the guide protrusion can be provided on the first bracket 111 accordingly. The guide protrusion is inserted into the guide groove. When the second bracket 112 slides, the guide protrusion slides along the guide in the guide groove, thereby limiting the sliding direction of the second bracket 112. The overall structure of the guide structure is simple, easy to process, and low in manufacturing cost.

[0062] In one embodiment, the pole piece surface processing device 100 includes two pressing rollers 130 , and the two pressing rollers 130 are disposed on opposite sides of the active roller 120 .

[0063] Reference Figure 2 and Figure 3In an embodiment of the utility model, the pole piece surface processing device 100 includes two pressure rollers 130, wherein one of the pressure rollers 130 exerts relatively less pressure on the pole piece 200, thereby forming a rough pressing effect on the surface of the pole piece 200, and the other pressure roller 130 exerts relatively greater pressure on the pole piece 200, thereby forming a fine pressing effect on the surface of the pole piece 200, thereby improving the consistency of the surface processing of the pole piece 200 by first rough pressing and then fine pressing. The two pressure rollers 130 are disposed on opposite sides of the active roller 120, and have a simple structure and are easy to assemble. Furthermore, the two pressure rollers 130 and the active roller 120 have the same diameter, thereby reducing the number of parts in the manufacturing process, improving manufacturing efficiency, and improving the interchangeability of the pole piece surface processing device 100. Among them, the trace structure 140 can be disposed only on the two pressure rollers 130, such as Figure 2 The marking structure 140 may also be provided only on the active roller 120, such as Figure 3 As shown; the marking structure 140 can also be set on the active roller 120 and the two pressure rollers 130 at the same time, not shown.

[0064] In one embodiment, the axis of the active roller 120 and the axes of the two pressure rollers 130 are located in the same horizontal plane.

[0065] Reference Figure 2 In the embodiment of the utility model, the axis of the active roller 120 and the axes of the two pressure rollers 130 are located in the same horizontal plane, and the pressure roller 130 moves in the horizontal direction when approaching or moving away from the active roller 120, reducing the influence of gravity on the movement of the pressure roller 130, and improving the accuracy of adjusting the size of the marking gap. When the two pressure rollers 130 and the active roller 120 squeeze the pole piece 200, the force direction of the pressure roller 130 on the pole piece 200 is in the horizontal direction, which is perpendicular to the direction of gravity, avoiding the influence of gravity on the pressure roller 130 squeezing the pole piece 200, thereby improving the accuracy of the surface processing of the pole piece 200.

[0066] In one embodiment, the pole piece surface processing device 100 further includes a second driving assembly 160 . The second driving assembly 160 is disposed on the frame 110 and is drivingly connected to the active roller 120 to drive the active roller 120 to rotate.

[0067] Reference Figure 2 In an embodiment of the present utility model, the pole piece surface processing device 100 further includes a second driving component 160, which drives the active roller 120 to rotate. The second driving component 160 can be in various forms such as a motor and a reducer.

[0068] In one embodiment, the marking structure 140 includes a plurality of punching protrusions 141, and the plurality of punching protrusions 141 are arranged at intervals, and the surface of the pole piece 200 is pressed by the plurality of punching protrusions 141 to form a plurality of corresponding depressions on the surface of the pole piece 200; or,

[0069] The marking structure 140 includes a scribing protrusion 142 , which is configured as a protrusion with a preset line shape. The scribing protrusion 142 presses the surface of the pole piece 200 to form a depression corresponding to the preset line shape on the surface of the pole piece 200 .

[0070] Reference Figure 4 and Figure 5 In the embodiment of the utility model, the marking structure 140 includes a plurality of punching protrusions 141. By squeezing the surface of the pole piece 200 with the punching protrusions 141, a plurality of depressions corresponding to the shape of the punching protrusions 141 can be formed on the surface of the pole piece 200, so as to realize the punching operation of the pole piece 200. The specific arrangement of the plurality of punching protrusions 141 can be designed as required to meet the functional requirements, and is not limited here. Specifically in the present embodiment, the punching protrusion 141 is in the shape of a truncated cone, and the diameter of one end connected to the outer peripheral wall of the active roller 120 or the outer peripheral wall of the pressure roller 130 is smaller, and the diameter of the end facing the pole piece 200 is larger, so as to facilitate squeezing the surface of the pole piece 200.

[0071] Reference Figure 6 and Figure 7 In an embodiment of the utility model, the marking structure 140 includes a marking protrusion 142, and the marking protrusion 142 has a preset line type, such as a vertical line, a horizontal line, a horizontal and vertical line, a diagonal line, a grid line, a sawtooth line, a wavy line, an S line, etc. By squeezing the surface of the pole piece 200 by the marking protrusion 142, a groove corresponding to the shape of the marking protrusion 142 can be formed on the surface of the pole piece 200, thereby realizing the marking operation of the pole piece 200.

[0072] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pole piece surface processing device, characterized in that: include: frame; A driving roller, rotatably arranged on the frame; as well as A pressure roller is rotatably arranged on the frame, and a plurality of pressure rollers are provided, each of the pressure rollers is spaced apart from the active roller to form a marking gap, and the sizes of the plurality of marking gaps tend to decrease along the first circumferential direction of the active roller, and a marking structure is provided on the outer peripheral wall of the active roller and / or the outer peripheral wall of the pressure roller; The pole piece is wound around the active roller along the direction in which the marking gap decreases and passes through multiple marking gaps in sequence. The active roller and any of the pressure rollers clamp the opposite sides of the pole piece to mark the pole piece through the marking structure.

2. The pole piece surface processing device according to claim 1, characterized in that: The frame comprises: A first bracket, the driving roller is rotatably mounted on the first bracket; and The second bracket is slidably arranged on the first bracket, and each pressing roller is correspondingly provided with a second bracket. The pressing roller is rotatably arranged on the corresponding second bracket, and the size of the marking gap formed by the corresponding pressing roller and the active roller is adjusted by sliding the second bracket.

3. The pole piece surface processing device according to claim 2, characterized in that: The pole piece surface processing device also includes a first driving component. Each second bracket is correspondingly provided with at least one first driving component. The first driving component is arranged on the first bracket and is driven to connect the corresponding second bracket to drive the second bracket to slide linearly.

4. The pole piece surface processing device according to claim 3, characterized in that: The second bracket includes a support member and two connecting members arranged at both ends of the support member, the first driving assembly is drivingly connected to the support member, and both ends of the pressure roller are rotationally connected to the two connecting members in a one-to-one correspondence.

5. The pole piece surface processing device according to claim 2, characterized in that: The pole piece surface processing device further includes a guide structure, which connects the first bracket and the second bracket to limit the sliding direction of the second bracket.

6. The pole piece surface processing device according to claim 5, characterized in that: The guide structure includes a guide groove and a guide protrusion. One of the first bracket and the second bracket is provided with the guide groove, and the other of the first bracket and the second bracket is provided with the guide protrusion corresponding to the guide groove. The guide protrusion slides relatively in the guide groove to limit the sliding direction of the second bracket.

7. The pole piece surface processing device according to claim 1, characterized in that: The pole piece surface processing device comprises two pressing rollers, and the two pressing rollers are arranged on opposite sides of the active roller.

8. The pole piece surface processing device according to claim 7, characterized in that: The axis of the active roller and the axes of the two pressure rollers are located in the same horizontal plane.

9. The pole piece surface processing device according to claim 1, characterized in that: The pole piece surface processing device further comprises a second driving component, which is arranged on the frame and drivingly connected to the active roller to drive the active roller to rotate.

10. The pole piece surface processing device according to claim 1, characterized in that: The marking structure comprises a plurality of punching protrusions, the plurality of punching protrusions are arranged at intervals, and the surface of the pole piece is pressed by the plurality of punching protrusions to form a plurality of corresponding depressions on the surface of the pole piece; or, The marking structure includes a scribing protrusion, which is configured as a protrusion with a preset line shape, and the surface of the pole piece is pressed by the scribing protrusion to form a depression corresponding to the preset line shape on the surface of the pole piece.

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