Constant-speed pressing mechanism

Abstract

The utility model discloses a constant speed hold-down mechanism, constant speed hold-down mechanism is used for hold-down battery pole piece material strap, constant speed hold-down mechanism includes: mounting rack, drive subassembly and press roll subassembly, drive subassembly is provided mounting rack, drive subassembly includes drive part and drive roll, drive part can drive the drive roll to rotate at constant speed, press roll subassembly is provided with the drive roll. The pressing roller assembly comprises a first pressing roller and a second pressing roller which are arranged in parallel, the first pressing roller, the second pressing roller and the driving roller are arranged in the same direction and in parallel, the first pressing roller and the second pressing roller are arranged on the two sides of the driving roller in the radial direction of the driving roller respectively, and gaps are formed between the first pressing roller and the driving roller and between the second pressing roller and the driving roller respectively. A pole piece material belt can pass through the gap under the driving of uniform-speed rotation of the driving roller, and the compression roller assembly can compress the pole piece material belt. According to the technical scheme, in the state that the driving roller rotates at a constant speed, coatings with different thicknesses on the surface of the pole piece can be pressed, the yield of the pole piece is increased, and the positioning precision and the operation efficiency of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a uniform speed pressing mechanism. Background Art

[0002] In the process of producing new energy lithium batteries, it is necessary to process the surfaces of specific areas of the positive and negative electrode sheet coils to meet specific process requirements. The processing technology includes but is not limited to coating, cleaning, punching, scribing, etc. Under normal circumstances, the coating thickness on the surface of the electrode sheet will be inconsistent. In the prior art, the coatings of different thicknesses on the surface of the electrode sheet are generally compressed by changing the real-time rotation speed of the drive shaft. However, changing the real-time rotation speed of the drive shaft requires controlling the motor to perform acceleration and deceleration. Controlling the motor to perform acceleration and deceleration requires a certain response time. For products with higher precision requirements, the material belt travel within this response time has exceeded the process precision requirements, affecting the electrode sheet yield, and will also affect the positioning accuracy and operating efficiency of the equipment. Utility Model Content

[0003] The embodiment of the utility model provides a uniform speed pressing mechanism, which can press coatings of different thicknesses on the surface of the pole piece, which is beneficial to improving the pole piece yield, and is also beneficial to improving the positioning accuracy and operating efficiency of the equipment.

[0004] The embodiment of the utility model provides a uniform speed pressing mechanism, which is used to press the battery pole piece strip, and the uniform speed pressing mechanism includes: a mounting frame, a driving assembly and a pressure roller assembly. The driving assembly is arranged on the mounting frame, and the driving assembly includes a driving part and a driving roller, and the driving part can drive the driving roller to rotate at a uniform speed. The pressure roller assembly is arranged on the mounting frame, and the pressure roller assembly includes a first pressure roller and a second pressure roller arranged in parallel with each other, and the first pressure roller and the second pressure roller are arranged in the same direction and in parallel with the driving roller, and the first pressure roller and the second pressure roller are respectively arranged on both sides of the driving roller in the radial direction of the driving roller, and there are gaps between the first pressure roller, the second pressure roller and the driving roller, respectively, and the pole piece strip can pass through the gap driven by the uniform rotation of the driving roller, and the pressure roller assembly can press the pole piece strip.

[0005] The technical solution of the utility model is to set up a roller assembly including a first roller and a second roller, and the first roller and the second roller can alternately press the driving roller. In the process of pressing coatings of different thicknesses on the surface of the pole piece strip, the rotation radius of the driving roller can be kept consistent, so that the driving roller can rotate at a uniform speed, avoiding changing the rotation speed of the driving roller to press coatings of different thicknesses on the surface of the pole piece strip, which is beneficial to improving the positioning accuracy and operating efficiency of the equipment, so that the equipment can operate stably and with high quality.

[0006] According to the aforementioned embodiments of the utility model, the upper and lower surfaces of the pole piece strip are sequentially provided with a first area with a coating, a second area with an empty foil area, and a third area with a coating along the running direction. The coating thickness of the first area and the third area is greater than that of the second area, and the arc length of the driving roller is greater than that of the second area. In the technical solution of the utility model, by setting the arc length of the driving roller to be greater than the length of the second area, in the process of pressing the coatings of different thicknesses on the surface of the pole piece strip, it is ensured that the first pressing roller or the second pressing roller can press the coating on the surface of the pole piece strip.

[0007] According to the aforementioned embodiments of the utility model, there are respectively a first tangent point and a second tangent point between the first pressing roller, the second pressing roller and the driving roller. When the second area of ​​the material feeding process is conveyed to the first tangent point, there is a distance between the pole piece material and the first pressing roller, and the second pressing roller can press the second area.

[0008] According to the aforementioned embodiment of the utility model, when the second area is conveyed to the second tangent point during the material conveying process, the first pressing roller can press the first area, and there is a distance between the pole piece material strip and the second pressing roller.

[0009] According to the aforementioned embodiment of the present utility model, the pole piece strip includes an upper surface and a lower surface, and the length of the empty foil area of ​​the upper surface is greater than the length of the empty foil area of ​​the lower surface.

[0010] According to the aforementioned embodiment of the utility model, the uniform speed clamping mechanism also includes: an encoder assembly. The encoder assembly is arranged on the mounting frame, and the encoder assembly is electrically connected to the drive assembly to form a closed-loop control. When the encoder assembly monitors that the pole piece belt conveying stroke is inconsistent with the drive roller stroke controlled by the drive unit, the feedback value of the encoder assembly can be compared with the output value of the drive unit to compensate for the slippage of the pole piece belt. In the technical solution of the utility model, by setting an encoder assembly, the slippage state of the pole piece belt can be monitored and fed back in real time, and the problem of slippage of the pole piece belt can be avoided, which is beneficial to improving the positioning accuracy and operating efficiency of the equipment, so that the equipment can operate stably and with high quality.

[0011] According to the aforementioned embodiment of the utility model, the uniform speed clamping mechanism further includes: a roller spacing adjustment component. The roller spacing adjustment component is arranged on the mounting frame and connected to the roller spacing adjustment component, and the roller spacing adjustment component can adjust the spacing between the first roller and the second roller. In the technical solution of the utility model, the roller spacing adjustment component is arranged. The roller spacing adjustment component can adjust the spacing between the first roller and the second roller, and can be compatible with more pole piece strips of different sizes.

[0012] According to the aforementioned embodiment of the utility model, the roller spacing adjustment assembly includes: a mounting top plate, two mounting side plates and an adjustment block. The mounting top plate is connected to the mounting frame. The two mounting side plates are respectively arranged at both ends of the first roller and the second roller along the extension direction of the first roller and the second roller, and each mounting side plate is provided with a groove on one side facing the first roller and the second roller. The adjustment block is slidably arranged in the groove, the first roller and the second roller are connected to the adjustment block, and the adjustment block can slide in the groove to adjust the spacing between the first roller and the second roller.

[0013] According to the above-mentioned embodiment of the utility model, the pressing roller assembly further comprises: a pressing actuator. The pressing actuator is arranged on the mounting frame and connected to the first pressing roller and the second pressing roller.

[0014] According to the aforementioned embodiments of the present invention, the clamping actuator includes one of a pneumatic cylinder, an electric cylinder, and a hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the uniform speed pressing mechanism of the utility model;

[0017] Figure 2 It is a front view of a part of the structure of an embodiment of the uniform speed pressing mechanism of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the ZZ plane.

[0019] Figure 4 It is a schematic diagram of the structure of the pole piece strip after flattening according to an embodiment of the uniform speed pressing mechanism of the utility model;

[0020] Figure 5 This is a structural schematic diagram of an encoder assembly of an embodiment of a uniform speed pressing mechanism of the utility model;

[0021] Figure 6 It is a partial structural schematic diagram of the pressure roller assembly of an embodiment of the uniform speed pressing mechanism of the utility model;

[0022] Figure 7 It is a structural schematic diagram of a pressure roller spacing adjustment component of an embodiment of the uniform speed pressing mechanism of the utility model.

[0023] Description of Figure Numbers:

[0024] Mounting frame-100, driving assembly-200, pressure roller assembly-300, pole piece strip-400, encoder assembly-500, pressure roller spacing adjustment assembly-600;

[0025] Driving unit 210, driving roller 220, first pressing roller 310, second pressing roller 320, pressing actuator 330, first area 410, second area 420, third area 430, encoder 510, encoding roller 520, encoding roller pressing assembly 530, mounting top plate 610, mounting side plate 620, adjusting block 630;

[0026] Groove - 621;

[0027] The first tangent point is A1, the second tangent point is A2, and the tape running direction is A3.

[0028] 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

[0029] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. 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 present utility model.

[0032] The embodiment of the utility model provides a uniform speed pressing mechanism, which can press coatings of different thicknesses on the surface of the pole piece, which is beneficial to improving the pole piece yield, and is also beneficial to improving the positioning accuracy and operating efficiency of the equipment.

[0033] The present utility model embodiment provides a uniform speed pressing mechanism, which is used to press the surface coating of the battery electrode strip 400. Figures 1 to 3 As shown, the uniform speed pressing mechanism includes: a mounting frame 100, a driving assembly 200 and a pressure roller assembly 300. The driving assembly 200 is arranged on the mounting frame 100, and the driving assembly 200 includes a driving part 210 and a driving roller 220. The driving part 210 can drive the driving roller 220 to rotate at a uniform speed. The pressure roller assembly 300 is arranged on the mounting frame 100, and the pressure roller assembly 300 includes a first pressure roller 310 and a second pressure roller 320 arranged in parallel with each other. The first pressure roller 310 and the second pressure roller 320 are arranged in the same direction and in parallel with the driving roller 220. The first pressure roller 310 and the second pressure roller 320 are respectively arranged on both sides of the driving roller 220 in the radial direction of the driving roller 220. There are gaps between the first pressure roller 310 and the second pressure roller 320 and the driving roller 220, respectively. The pole piece strip 400 can pass through the gap driven by the uniform speed rotation of the driving roller 220, and the pressure roller assembly 300 can press the surface coating of the pole piece strip 400.

[0034] The technical solution of the utility model is to set up a roller assembly 300 including a first roller 310 and a second roller 320. The first roller 310 and the second roller 320 can alternately press the drive roller 220. In the process of pressing the coatings of different thicknesses on the surface of the pole piece strip 400, the rotation radius of the drive roller 220 can be kept consistent so that the drive roller 220 can rotate at a uniform speed, avoiding changing the rotation speed of the drive roller 220 to press the coatings of different thicknesses on the surface of the pole piece strip 400, which is beneficial to improving the positioning accuracy and operation efficiency of the equipment, so that the equipment can operate stably and with high quality.

[0035] like Figure 4 As shown, the upper and lower surfaces of the pole piece strip 400 are sequentially provided with a first area 410 with a coating, a second area 420 which is an empty foil area, and a third area 430 with a coating along the tape-walking direction. The coating thickness of the first area 410 and the third area 430 is greater than that of the second area 420, and the arc length of the wrap angle of the driving roller 220 is greater than that of the second area 420. In the technical solution of the utility model, by setting the arc length of the wrap angle of the driving roller 220 to be greater than the length of the second area 420, in the process of compacting the coatings of different thicknesses on the surface of the pole piece strip 400, it is ensured that the first pressing roller 310 or the second pressing roller 320 can compact the coating on the surface of the pole piece strip 400.

[0036] like Figures 1 to 7As shown, the pressing roller assembly 300 further includes: a pressing actuator 330. The pressing actuator 330 is disposed on the mounting frame 100, and the pressing actuator 330 is connected to the first pressing roller 310 and the second pressing roller 320. In the embodiment of the utility model, the pressing actuator 330 includes one of a pneumatic cylinder, an electric cylinder, and an oil cylinder.

[0037] During the operation of the device, the first pressing roller 310 and the second pressing roller 320 in the pressing roller assembly 300 first press the pole piece strip 400 and the driving roller 220 tightly. Figure 3 As shown, there are first tangent points A1 and second tangent points A2 between the first pressing roller 310, the second pressing roller 320 and the driving roller 220, respectively. When the second region 420 is conveyed to the first tangent point A1 during the material conveying process, there is a distance between the pole piece material strip 400 and the first pressing roller 310, and the second pressing roller 320 can press the second region 420. When the second region 420 is conveyed to the second tangent point A2 during the material conveying process, the first pressing roller 310 can press the first region 410, and there is a distance between the pole piece material strip 400 and the second pressing roller 320.

[0038] In the embodiment of the utility model, by controlling the processing accuracy when designing the drawings and inspecting the incoming materials, the parallelism and coaxiality of the driving roller 220 and the first pressing roller 310 and the second pressing roller 320 are ensured, which is beneficial to improving the positioning accuracy and operating efficiency of the equipment, so that the equipment can operate stably and with high quality.

[0039] like Figure 4 As shown, in the embodiment of the present utility model, the pole piece strip 400 includes an upper surface and a lower surface, and the length of the empty foil area on the upper surface of the pole piece strip 400 is greater than the length of the empty foil area on the lower surface.

[0040] Next, the specific working steps of an embodiment of a uniform speed pressing mechanism for pressing the surface coating of the pole piece strip 400 are described.

[0041] First, if Figures 1 to 3 As shown in FIG. 1 , when the material tape moves forward along the tape running direction A3, as shown in FIG. 1 , Figure 4 As shown in FIG. 1 , when the first pressing roller 310 presses the nodes A and C of the third region 430, since the AB and CD segments are both in the second region 420 and are empty foil areas, the surface thickness of the pole piece strip 400 suddenly becomes thinner. The pole piece strip 400 continues to move forward along the tape direction A3, which can drive the empty foil second region 420 of the AB and CD segments to be close to the surface of the driving roller 220, as shown in FIG. Figure 3 As shown, its rotation radius becomes smaller to r, and at this time the first pressing roller 310 cannot press the pole piece strip 400. Since the arc length of the wrap angle of the driving roller 220 is greater than the length of the AB segment in the second area 420, the second pressing roller 320 can still press tightly on the first area 410 and the third area 430 with the upper and lower coatings, and the actual rotation radius of the driving roller 220 is still R.

[0042] Then, if Figures 1 to 3 As shown in FIG. 1 , when the material tape continues to move forward along the tape direction A3, as shown in FIG. Figure 4 As shown, when the second pressing roller 320 presses the A and C nodes of the third region 430, since the AB and CD segments are both in the second region 420 and are empty foil areas, the surface thickness of the pole piece strip 400 suddenly becomes thinner, and the second pressing roller 320 cannot press the pole piece strip 400. Figure 3 As shown, since the arc length of the driving roller 220 is greater than the length of the AB segment in the second area 420, the first area 410 with coating on the pole piece strip 400 has been pressed by the first pressing roller 310, and the actual rotation radius of the driving roller 220 is still R.

[0043] In summary, the technical solution of the utility model can alternately press the driving roller 220 through the first pressing roller 310 and the second pressing roller 320. In the process of pressing the coatings of different thicknesses on the surface of the pole piece strip 400, the rotation radius of the driving roller 220 can be kept consistent, so that the driving roller 220 can rotate at a uniform speed, avoiding changing the rotation speed of the driving roller 220 to achieve uniform movement of the pole piece strip, which is beneficial to improving the positioning accuracy and operation efficiency of the equipment, so that the equipment can operate stably and with high quality. The working process described above is used to press such as Figure 4 The pole piece strip 400, the coating arrangement on the upper and lower surfaces of the pole piece strip 400, and the empty foil arrangement are shown in the figure. The present utility model embodiment can also compress pole piece strips 400 of other forms, and the arrangement of the coating and the empty foil on the surface of the pole piece strip 400 is not limited.

[0044] like Figure 1 as well as Figure 5 As shown, the uniform speed clamping mechanism also includes: an encoder assembly 500. The encoder assembly 500 is arranged on the mounting frame 100, and the encoder assembly 500 is electrically connected to the drive assembly 200 to form a closed-loop control. When the encoder assembly 500 monitors that the tape travel of the pole piece tape 400 is inconsistent with the travel of the drive roller 220 controlled by the drive unit 210, the feedback value of the encoder assembly 500 can be compared with the output value of the drive unit 210 to compensate for the slippage of the pole piece tape 400. In the technical solution of the utility model, by setting the encoder assembly 500, the slippage state of the pole piece tape 400 can be monitored and fed back in real time, and the problem of slippage of the pole piece tape 400 can be avoided, which is beneficial to improving the positioning accuracy and operating efficiency of the equipment, so that the equipment can operate stably and with high quality. Figure 5As shown, the encoder assembly 500 includes an encoder 510, an encoder roller 520 and an encoder roller clamping assembly 530. In the embodiment of the utility model, the drive roller 220 can be in the form of, but not limited to, a steel roller, a sandblasting roller, a knurled roller, and a frosted roller. The encoder assembly 500 is electrically connected to the drive assembly 200 to form a closed-loop control. When the encoder assembly 500 monitors that the pole piece material belt 400 travels inconsistently with the drive roller 220 travel controlled by the drive unit 210, the feedback value of the encoder assembly 500 can be compared with the output value of the drive unit 210 to compensate for the slippage of the pole piece material belt 400, and the pole piece material belt 400 can be prevented from slipping on the drive roller 220, which is beneficial to improving the positioning accuracy and operating efficiency of the equipment, so that the equipment can operate stably and with high quality.

[0045] like Figure 1 , Figure 6 as well as Figure 7 As shown, the uniform speed pressing mechanism also includes: a roller spacing adjustment component 600. The roller spacing adjustment component 600 is arranged on the mounting frame 100 and connected to the roller spacing adjustment component 300, and the roller spacing adjustment component 600 can adjust the spacing between the first roller 310 and the second roller 320. In the technical solution of the utility model, by setting the roller spacing adjustment component 600, the roller spacing adjustment component 600 can adjust the spacing between the first roller 310 and the second roller 320, and can be compatible with more pole piece strips 400 of different sizes.

[0046] like Figure 7 As shown, the roller spacing adjustment assembly 600 includes: a mounting top plate 610, two mounting side plates 620 and an adjustment block 630. The mounting top plate 610 is connected to the mounting frame 100. The two mounting side plates 620 are respectively arranged at the two ends of the first roller 310 and the second roller 320 along the extension direction of the first roller 310 and the second roller 320, and each mounting side plate 620 is provided with a groove 621 on one side facing the first roller 310 and the second roller 320. The adjustment block 630 is slidably arranged in the groove 621, and the first roller 310 and the second roller 320 are connected to the adjustment block 630, and the adjustment block 630 can slide in the groove 621 to adjust the spacing between the first roller 310 and the second roller 320. In an embodiment of the utility model, the roller spacing adjustment assembly 600 includes four adjustment blocks 630, and grooves 621 corresponding to the adjustment blocks 630 are set on the mounting side plate 620. The adjustment blocks 630 slide in the grooves 621 to adjust the spacing between the first roller 310 and the second roller 320, while also ensuring the parallelism between the first roller 310 and the second roller 320.

[0047] The above description is only a preferred 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 inventive 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 uniform speed pressing mechanism, characterized in that: The uniform speed pressing mechanism is used to press the battery electrode strip, and the uniform speed pressing mechanism includes: Mounting frame; A driving assembly, the driving assembly is arranged on the mounting frame, the driving assembly comprises a driving part and a driving roller, and the driving part can drive the driving roller to rotate at a constant speed; A pressure roller assembly, wherein the pressure roller assembly is arranged on the mounting frame, and the pressure roller assembly comprises a first pressure roller and a second pressure roller which are arranged parallel to each other, the first pressure roller and the second pressure roller are arranged in the same direction and in parallel with the driving roller, the first pressure roller and the second pressure roller are respectively arranged on both sides of the driving roller in the radial direction of the driving roller, and there are gaps between the first pressure roller, the second pressure roller and the driving roller respectively, and the pole piece strip can pass through the gaps driven by the uniform rotation of the driving roller, and the pressure roller assembly can compress the pole piece strip.

2. The uniform speed pressing mechanism according to claim 1, characterized in that: The upper and lower surfaces of the pole piece strip are sequentially provided with a first area with coating, a second area which is an empty foil area and a third area with coating along the strip running direction. The coating thickness of the first area and the third area is greater than that of the second area, and the arc length of the angle of the driving roller is greater than that of the second area.

3. The uniform speed pressing mechanism according to claim 2, characterized in that: There are a first tangent point and a second tangent point between the first pressing roller, the second pressing roller and the driving roller respectively. When the second area is conveyed to the first tangent point during the material conveying process, there is a distance between the pole piece material and the first pressing roller, and the second pressing roller can press the third area.

4. The uniform speed pressing mechanism according to claim 3, characterized in that: When the second region is conveyed to the second tangent point during the material conveying process, the first pressing roller can press the first region, and there is a distance between the pole piece material strip and the second pressing roller.

5. The uniform speed pressing mechanism according to claim 2, characterized in that: The pole piece strip comprises an upper surface and a lower surface, and the length of the empty foil area on the upper surface is greater than the length of the empty foil area on the lower surface.

6. The uniform speed pressing mechanism according to claim 1, characterized in that: The uniform speed pressing mechanism also includes: An encoder component is arranged on the mounting frame, and the encoder component is electrically connected to the drive component to form a closed-loop control. When the pole piece belt stroke monitored by the encoder component is inconsistent with the drive roller stroke controlled by the drive unit, the feedback value of the encoder component can be compared with the output value of the drive unit to compensate for the slippage of the pole piece belt.

7. The uniform speed pressing mechanism according to claim 1, characterized in that: The uniform speed pressing mechanism also includes: A pressure roller spacing adjustment component is arranged on the mounting frame and connected to the pressure roller component, and the pressure roller spacing adjustment component can adjust the spacing between the first pressure roller and the second pressure roller.

8. The uniform speed pressing mechanism according to claim 7, characterized in that: The pressure roller spacing adjustment component comprises: An installation top plate, the installation top plate is connected to the installation frame; Two mounting side plates, the two mounting side plates are respectively arranged at two ends of the first pressing roller and the second pressing roller along the extension direction of the first pressing roller and the second pressing roller, and each mounting side plate is provided with a groove on one side facing the first pressing roller and the second pressing roller; An adjusting block is slidably disposed in the groove, the first pressing roller and the second pressing roller are connected to the adjusting block, and the adjusting block can slide in the groove to adjust the distance between the first pressing roller and the second pressing roller.

9. The uniform speed pressing mechanism according to claim 1, characterized in that: The pressure roller assembly also includes: A clamping actuator, wherein the clamping actuator is disposed on the mounting frame and connected to the first pressing roller and the second pressing roller.

10. The uniform speed pressing mechanism according to claim 9, characterized in that: The clamping actuator includes one of a pneumatic cylinder, an electric cylinder, and an oil cylinder.

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