Pole piece conveying mechanism and thermal compounding device

Abstract

The invention provides a pole piece conveying mechanism and a thermal compounding device. The pole piece conveying mechanism comprises a feeding roller assembly; the clamping piece assembly is arranged to clamp the cut pole piece and drive the pole piece to move; wherein the feeding roller assembly is suitable for being aligned with the clamping piece assembly through an alignment structure, so that one part of the clamping piece assembly can be inserted into the feeding roller assembly, and the pole piece extends into the feeding roller assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal lamination, and particularly to a pole piece conveying mechanism and a thermal lamination device. Background Art

[0002] In related technologies, a thermally laminated pole piece assembly includes a negative pole piece, a separator, and a positive pole piece that are stacked. Among them, the negative pole piece and the positive pole piece are formed by cutting a strip of pole piece material into single pole pieces, and the single pole pieces are transferred to a feeding roller assembly by a pole piece conveying mechanism and then provided to a thermal lamination roller assembly for thermal lamination. After cutting, the front part of the single pole piece will droop, making it difficult to transfer the single pole piece into the feeding roller assembly. Moreover, after the front part of the single pole piece droops, it will hit the feeding roller assembly and cause the pole piece to be folded. Summary of the Invention

[0003] Embodiments of the present invention provide a pole piece conveying mechanism and a thermal lamination device, which can improve the technical problem of the front part of the pole piece drooping during the process of conveying the pole piece by the pole piece conveying mechanism.

[0004] In a first aspect, embodiments of the present invention provide a pole piece conveying mechanism, including: a feeding roller assembly;

[0005] a clip component, which is configured to clamp the cut pole piece and drive the pole piece to move;

[0006] wherein, the feeding roller assembly is adapted to be aligned with the clip component through an alignment structure, so that a part of the clip component can be inserted into the feeding roller assembly to extend the pole piece into the feeding roller assembly.

[0007] In an embodiment, the alignment structure includes a cooperating claw and an avoidance groove. The claw is provided on the clip component, and the avoidance groove is provided on the feeding roller assembly.

[0008] In an embodiment, the clip component includes two clamping plates, and each of the two clamping plates includes at least one of the claws; and / or, the feeding roller assembly includes a first feeding roller and a second feeding roller, the pole piece is clamped between the first feeding roller and the second feeding roller, and each of the first feeding roller and the second feeding roller includes at least one of the avoidance grooves.

[0009] In an embodiment, each of the two clamping plates includes a plurality of the claws, and the plurality of claws include a first claw and a second claw. The length of the second claw is greater than the length of the first claw, and the second claw can be inserted into the avoidance groove.

[0010] In an embodiment, the difference in length between the second claw and the first claw is 0.1 cm to 1 cm.

[0011] In one embodiment, the feed roller assembly further comprises a guide plate, wherein the guide plate is located on a side of the second feed roller close to the clamping plate, and the guide plate is located under the pole piece to support the pole piece.

[0012] In one embodiment, the guide plate is provided with an avoidance portion, and the avoidance portion is configured to avoid the plurality of claws.

[0013] In one embodiment, the avoidance portion includes a plurality of avoidance holes provided on the guide plate, and the second claw passes through the avoidance holes and is inserted into the avoidance groove.

[0014] In one embodiment, the feed roller assembly further includes a third feed roller, which is spaced apart from the second feed roller and located on the side of the second feed roller away from the guide plate, and the third feed roller is located under the pole piece to support the pole piece.

[0015] In one embodiment, the pole piece conveying mechanism further comprises a first driving assembly, wherein the first driving assembly is connected to the clamping piece assembly and drives the clamping piece assembly to move in a direction close to the feed roller assembly.

[0016] In one embodiment, the first driving assembly includes a first driving member and a sliding member connected to each other, the sliding member is connected to the clip assembly, and the sliding member is configured to drive the clip assembly under the drive of the first driving member.

[0017] In one embodiment, the pole piece conveying mechanism also includes a second driving member, the two clamps include a first clamp and a second clamp, the second driving member is connected to the second clamp and drives the second clamp to move toward the direction close to the first clamp so that the pole piece can be clamped between the first clamp and the second clamp.

[0018] In the second aspect, an embodiment of the present invention provides a thermal composite device, which includes the above-mentioned pole piece conveying mechanism and the thermal composite roller mechanism, wherein the pole piece conveying mechanism is configured to convey the pole piece to the thermal composite roller mechanism, and the thermal composite roller mechanism is configured to hot-roll the pole piece and the diaphragm to form a thermal composite pole piece assembly.

[0019] Beneficial effects of the embodiments of the present invention:

[0020] In an embodiment of the present invention, the cut pole piece is clamped by a clip component, and the feeding roller component is adapted to be aligned with the clip component through an alignment structure, so that a part of the clip component can be inserted into the feeding roller component to drive the pole piece to move into the feeding roller component. Thus, the pole piece is always clamped by the clip component during the process of being provided to the feeding roller component, and the pole piece extends into the feeding roller component and is clamped by the feeding roller component, effectively improving the problem of the front part of the pole piece sagging during the transmission of the pole piece. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a perspective three-dimensional schematic diagram of a thermal composite device provided by an embodiment of the present invention;

[0023] Figure 2 is Figure 1 a partial enlarged view of;

[0024] Figure 3 is a perspective three-dimensional schematic diagram of another perspective of the thermal composite device provided by an embodiment of the present invention;

[0025] Figure 4 is a perspective three-dimensional schematic diagram of a pole piece transmission mechanism and a thermal composite roller mechanism provided by an embodiment of the present invention;

[0026] Figure 5 is Figure 4 a partial enlarged view of;

[0027] Reference Numerals in the Drawings:

[0028] 100, pole piece transmission mechanism;

[0029] 1, feeding roller component; 11, first feeding roller; 12, second feeding roller; 13, third feeding roller; 14, guide plate; 141, avoidance part; 15, avoidance groove; 16, feeding roller connection plate;

[0030] 2, clip component; 21, first clip; 22, second clip; 23, claw; 231, first claw; 232, second claw; 233, third claw; 24, clip fixing frame;

[0031] 3, alignment structure;

[0032] 41. First driving assembly; 411. First driving member; 412. Sliding member; 42. Second driving member;

[0033] 5. Thermal composite roller mechanism; 51. First thermal composite roller; 52. Second thermal composite roller; 53. Thermal composite roller fixing frame;

[0034] 6. Electrode sheet cutting mechanism; 61. Cutting assembly; 62. Dust suction member;

[0035] 8. Thermal composite electrode sheet assembly; 81. First positive electrode sheet; 82. Second positive electrode sheet; Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0037] In the related art, the thermal composite electrode sheet assembly includes a negative electrode sheet, a separator, and a positive electrode sheet stacked. Among them, the negative electrode sheet and the positive electrode sheet are obtained by cutting a strip-shaped electrode sheet material into single electrode sheets, and the single electrode sheets are transferred to the feeding roller assembly through a sheet feeding mechanism and then provided to the thermal composite roller assembly for thermal composite. After cutting, the front part of the single electrode sheet will sag, making it difficult to transfer the single electrode sheet into the feeding roller assembly. Moreover, after the front part of the single electrode sheet sags, it will hit the feeding roller assembly and cause the electrode sheet to be folded.

[0038] An embodiment of the present application provides a thermal composite device, as Figure 1 and Figure 2 shown. This thermal composite device includes an electrode sheet cutting mechanism 6, an electrode sheet conveying mechanism 100, and a thermal composite roller mechanism 5.

[0039] The electrode sheet cutting mechanism 6 includes a cutting assembly 61 and a dust suction member 62. The cutting assembly 61 includes a cutter, a cutter driving member, and an encoder. The electrode sheet feeding mechanism provides a strip-shaped electrode sheet to the cutting assembly. The encoder controls the electrode sheet feeding mechanism to move the electrode sheet material a fixed distance through a set program. The cutter cuts the strip-shaped electrode sheet into single electrode sheets. The dust suction member 62 is arranged near the cutter and adsorbs the dust generated by cutting the electrode sheet through negative pressure.

[0040] The electrode sheet conveying mechanism 100 includes a sheet clamping assembly 2 and a feeding roller assembly 1. The sheet clamping assembly 2 is configured to clamp the cut electrode sheet and supply the electrode sheet to the feeding roller assembly 1. The electrode sheet can be a positive electrode sheet or a negative electrode sheet. Taking the positive electrode sheet as an example, the feeding roller assembly 1 drives the positive electrode sheet to move and supplies it to the thermal compounding roller mechanism 5 for thermal compounding with the separator and the negative electrode sheet.

[0041] Wherein, a positioning structure 3 is provided between the feeding roller assembly 1 and the sheet clamping assembly 2. The positioning structure 3 enables a part of the sheet clamping assembly 2 to be inserted into the feeding roller assembly 1 so that the electrode sheet extends into the feeding roller assembly, so that the electrode sheet is always clamped by the sheet clamping assembly 2 during the process of being supplied to the feeding roller assembly, and the electrode sheet extends into the feeding roller assembly 1 and is clamped by the feeding roller assembly 1, thus making it difficult to produce the problem of the front part of the electrode sheet sagging.

[0042] In some embodiments, continue to refer to Figure 1 、 Figure 2 and Figure 4 and Figure 5 , the positioning structure 3 includes a cooperating claw 23 and a relief groove 15. The claw 23 is provided on the sheet clamping assembly 2, and the relief groove 15 is provided on the feeding roller assembly 1. A part of the claw 23 can extend into the relief groove 15, so that the sheet clamping assembly 2 can drive the electrode sheet to extend into the interior of the feeding roller assembly 1 to be fully clamped by the feeding roller assembly 1. It can be understood that if there is no positioning structure between the sheet clamping assembly 2 and the feeding roller assembly 1, the sheet clamping assembly 2 will collide with the feeding roller assembly 1 when it continues to move after approaching the feeding roller assembly 1, thereby damaging the feeding roller assembly 1. By providing the relief groove 15 on the feeding roller assembly 1 and the claw 23 on the sheet clamping assembly 2, the claw 23 can extend into the relief groove 15, thereby driving the electrode sheet to extend into the feeding roller assembly 1.

[0043] In some embodiments, continue to refer to Figures 1 to 3 , the thermally compounded electrode sheet assembly 8 includes a first thermally compounded electrode sheet assembly and a second thermally compounded electrode sheet assembly which are arranged alternately in sequence. The first thermally compounded electrode sheet assembly includes a first positive electrode sheet 81, a first separator, a negative electrode sheet and a second separator. The second thermally compounded electrode sheet assembly includes a first separator, a negative electrode sheet, a second separator and a second positive electrode sheet 82. The electrode sheet conveying mechanism 100 includes two sets of sheet clamping assemblies 2 and two sets of feeding roller assemblies 1. One set of sheet clamping assemblies 2 and one set of feeding roller assemblies 1 are arranged on one side of the thermally compounded electrode sheet assembly 8 and are configured to clamp the cut first positive electrode sheet, and the other set of sheet clamping assemblies 2 and the other set of feeding roller assemblies 1 are arranged on the other side of the thermally compounded electrode sheet assembly 8 and are configured to clamp the cut second positive electrode sheet.

[0044] The two sets of clip assemblies 2 each include two clamping plates, which are the first clamping plate 21 and the second clamping plate 22 respectively. The first clamping plate 21 is located above the pole piece, and the second clamping plate 22 is located below the pole piece. The pole piece is clamped by the first clamping plate 21 and the second clamping plate 22.

[0045] Both the first clamping plate 21 and the second clamping plate 22 include at least one clamping claw 23, and the number of at least one clamping claw 23 can be three, five or seven. By setting the parts of the first clamping plate 21 and the second clamping plate 22 for clamping the front end of the pole piece as a clamping claw structure, compared with the conventional flat structure, the clamping force of the clamping claw structure on the pole piece is smaller, so it will not leave indentations on the pole piece and damage the pole piece.

[0046] In a specific embodiment, both the first clamping plate 21 and the second clamping plate 22 include five clamping claws. The five clamping claws include two first clamping claws 231 located on both sides, a third clamping claw 233 located in the middle, and a second clamping claw 232 located between the first clamping claw 231 and the third clamping claw 233. Among them, the length of the second clamping claw 232 is greater than the length of the first clamping claw 231, and the second clamping claw 232 can be inserted into the avoidance groove 15 of the feeding roller assembly 1.

[0047] In some embodiments, such as Figure 4 and Figure 5 shown, the difference between the length L2 of the second clamping claw 232 and the length L1 of the first clamping claw 231 is 0.1 cm to 1 cm. It can be understood that the greater the difference between the length L2 of the second clamping claw 232 and the length L1 of the first clamping claw 231, the longer the length that the second clamping claw 232 can extend into the avoidance groove 15 of the feeding roller assembly 1, so as to drive the pole piece to extend into the feeding roller assembly 1 for a longer length, so that the pole piece can be placed more stably inside the feeding roller assembly 1 and thus improve the problem of the front end of the pole piece sagging. The inventor found through research that when the difference between the length of the second clamping claw 232 and the length of the first clamping claw 231 is less than 0.1 cm, the length that the second clamping claw 232 extends into the avoidance groove 15 of the feeding roller assembly 1 is short, which is not conducive to driving the pole piece to extend into the feeding roller assembly 1. When the difference between the length of the second clamping claw 232 and the length of the first clamping claw 231 is greater than 1 cm, the length that the second clamping claw 232 extends into the avoidance groove 15 of the feeding roller assembly 1 is greater than 1 cm. Correspondingly, the depth of the avoidance groove 15 of the feeding roller assembly 1 needs to be set to be greater than 1 cm, which will affect the structural strength of the feeding roller assembly 1 itself and cause insufficient clamping effect of the feeding roller assembly 1 on the pole piece. In a specific embodiment, the difference between the length of the second clamping claw 232 and the length of the first clamping claw 231 can be 0.1 cm, 0.2 cm, 0.3 cm, 0.4 cm, 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, 1.0 cm, and the values between any two of the above values or the ranges between any two of the above values.

[0048] In some embodiments, as Figure 3 shown, both of the two feeding roller assemblies 1 include a first feeding roller 11 and a second feeding roller 12. The first feeding roller 11 is located above the pole piece, and the second feeding roller 12 is located below the pole piece. The pole piece is clamped between the first feeding roller 11 and the second feeding roller 12. One of the first feeding roller 11 and the second feeding roller 12 is connected with a feeding roller driving member, and the feeding roller driving member can be a cylinder. Taking the first feeding roller 11 being connected with the feeding roller driving member as an example, during the process of the pole piece being supplied to the feeding roller assembly 1, the first feeding roller 11 and the second feeding roller 12 are in a loose state, and the interval between the first feeding roller 11 and the second feeding roller 12 is relatively large to facilitate the pole piece to extend between the first feeding roller 11 and the second feeding roller 12. When the pole piece is conveyed by the clamping piece assembly 2 to the interval between the first feeding roller 11 and the second feeding roller 12, the feeding roller driving member drives the first feeding roller 11 to move towards the direction close to the second feeding roller 12 so that the pole piece is clamped by the first feeding roller 11 and the second feeding roller 12.

[0049] Wherein, two avoiding grooves 15 are arranged on both the first feeding roller 11 and the second feeding roller 12, and the two avoiding grooves 15 are arranged at intervals. The two second claws 232 on the first clamping plate 21 can extend into the two avoiding grooves 15 on the first feeding roller 11, and the two second claws 232 on the second clamping plate 22 can extend into the two avoiding grooves 15 on the second feeding roller 12.

[0050] Both of the two feeding roller assemblies 1 include a guide plate 14. The guide plate 14 is located on the side where the second feeding roller 12 is located, and is located on the side of the second feeding roller 12 close to the clamping piece assembly 2. The guide plate 14 is located below the pole piece to support the pole piece. Through the support and guiding action of the guide plate 14, the pole piece can enter the interval between the first feeding roller 11 and the second feeding roller 12. Further, before the pole piece enters the first feeding roller 11 and the second feeding roller 12, the pole piece is supported by the guide plate 14, thereby effectively improving the problem of the front end of the pole piece sagging.

[0051] In some embodiments, as Figure 3 shown, the guide plate 14 is provided with an avoiding portion 141, and the avoiding portion 141 is arranged to avoid the claw 23 structure on the second clamping plate 22 so that the clamping piece assembly 2 can drive the pole piece to move towards the inside of the first feeding roller 11 and the second feeding roller 12. In a specific embodiment, the avoiding portion 141 can be a plurality of avoiding holes, and the plurality of avoiding holes extend from one side of the guide plate 14 to the other side thereof.

[0052] In some embodiments, continue to refer to Figure 3, the feeding roller assembly 1 further includes a third feeding roller 13, and the third feeding roller 13 is located below the pole piece to support the pole piece. Among them, the third feeding roller 13 and the second feeding roller 12 are arranged at intervals and are located on the side of the second feeding roller 12 away from the guide plate 14. By arranging the third feeding roller 13 on the other side of the second feeding roller 12 to support the pole piece, when the first feeding roller 11 and the second feeding roller 12 drive the pole piece to move forward, the pole piece is supported by the third feeding roller 13.

[0053] The feeding roller assembly 1 clamps the cut pole piece and drives the pole piece into the thermal compounding roller mechanism 5. The thermal compounding roller mechanism 5 includes two thermal compounding roller assemblies, and the two thermal compounding roller assemblies include a first thermal compounding roller 51 and a second thermal compounding roller 52. The first positive pole piece 81, the first separator, the negative pole piece and the second separator are combined by the first thermal compounding roller 51 and the second thermal compounding roller 52 through thermal rolling to form a first thermally compounded pole piece assembly. The first separator, the negative pole piece, the second separator and the second positive pole piece 82 are combined by the first thermal compounding roller 51 and the second thermal compounding roller 52 through thermal rolling to form a second thermally compounded pole piece assembly.

[0054] The thermal compounding roller mechanism 5 further includes a thermal compounding roller fixing frame 53, and both the first thermal compounding roller 51 and the second thermal compounding roller 52 are fixed in the thermal compounding roller fixing frame 53. The feeding roller assembly 1 further includes two feeding roller connecting plates 16. The two feeding roller connecting plates 16 are located on both sides of the first feeding roller 11, the second feeding roller 12 and the third feeding roller 13. The first feeding roller 11, the second feeding roller 12 and the third feeding roller 13 are all fixed on the two feeding roller connecting plates 16, and the two feeding roller connecting plates 16 are both connected to the thermal compounding roller fixing frame 53.

[0055] In some embodiments, the pole piece conveying mechanism 100 further includes a first driving component 41. The first driving component 41 is connected to the clip component 2 and drives the clip component 2 to move towards the direction close to the feeding roller assembly 1, so that the clip component 2 drives the pole piece to extend into the feeding roller assembly 1 after clamping the pole piece.

[0056] In a specific embodiment, the first driving component 41 includes a connected first driving member 411 and a sliding member 412. The sliding member 412 is connected to the clip component 2, and the sliding member 412 is arranged to drive the clip component 2 under the drive of the first driving member 411. The first driving member 411 can be a linear motor, and the sliding member 412 can be a linear motor slider connected to the linear motor. The clip component 2 includes a clip fixing frame 24, and both the first clip 21 and the second clip 22 are fixed on the clip fixing frame 24. The sliding member 412 is connected to the clip fixing frame 24, and the sliding member 412 drives the clip component 2 to move towards the direction close to the feeding roller assembly 1 under the drive of the linear motor.

[0057] In some embodiments, the pole piece conveying mechanism includes a second driving member 42, and the second driving member 42 is connected to the second clamping plate 22 to drive the second clamping plate 22 to move towards the direction close to the first clamping plate 21 so that the pole piece can be clamped between the first clamping plate 21 and the second clamping plate 22.

[0058] Wherein, the first driving assembly 41 is connected to the side where the first clamping plate 21 is located, and the second driving member 42 is connected to the side where the second clamping plate 22 is located.

[0059] The embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A pole piece conveying mechanism, characterized in that: include: Feed roller assembly; A clip assembly, the clip assembly is configured to clamp the cut pole piece and drive the pole piece to move; Wherein, the feed roller assembly is suitable for being aligned with the clip assembly through an alignment structure, so that a part of the clip assembly can be inserted into the feed roller assembly to extend the pole piece into the feed roller assembly.

2. The pole piece conveying mechanism according to claim 1, characterized in that: The alignment structure comprises a matched clamping claw and an avoidance groove, wherein the clamping claw is arranged on the clamping piece assembly, and the avoidance groove is arranged on the feeding roller assembly.

3. The pole piece conveying mechanism according to claim 2, characterized in that: The clamping plate assembly includes two clamping plates, and each of the two clamping plates includes at least one clamping claw; and / or, the feed roller assembly includes a first feed roller and a second feed roller, and the pole piece is clamped between the first feed roller and the second feed roller, and the first feed roller and the second feed roller each include at least one avoidance groove.

4. The pole piece conveying mechanism according to claim 3, characterized in that: Both of the two clamps include a plurality of claws, and the plurality of claws include a first claw and a second claw, the length of the second claw is greater than the length of the first claw, and the second claw can be inserted into the avoidance groove.

5. The pole piece conveying mechanism according to claim 4, characterized in that: The difference between the length of the second claw and the length of the first claw is 0.1 cm to 1 cm.

6. The pole piece conveying mechanism according to claim 4, characterized in that: The feed roller assembly further comprises a guide plate, which is located on a side of the second feed roller close to the clamping plate, and the guide plate is located under the pole piece to support the pole piece.

7. The pole piece conveying mechanism according to claim 6, characterized in that: The guide plate is provided with an escape portion, and the escape portion is configured to escape the plurality of claws.

8. The pole piece conveying mechanism according to claim 7, characterized in that: The avoidance portion includes a plurality of avoidance holes arranged on the guide plate, and the second clamping claw passes through the avoidance holes and is inserted into the avoidance groove.

9. The pole piece conveying mechanism according to claim 6, characterized in that: The feed roller assembly also includes a third feed roller, which is spaced apart from the second feed roller and located on a side of the second feed roller away from the guide plate, and the third feed roller is located under the pole piece to support the pole piece.

10. The pole piece conveying mechanism according to claim 2, characterized in that: The pole piece conveying mechanism also includes a first driving assembly, which is connected to the clamping piece assembly and drives the clamping piece assembly to move toward a direction close to the feeding roller assembly.

11. The pole piece conveying mechanism according to claim 10, characterized in that: The first driving assembly includes a first driving member and a sliding member connected to each other. The sliding member is connected to the clip assembly. The sliding member is configured to drive the clip assembly under the drive of the first driving member.

12. The pole piece conveying mechanism according to claim 3, characterized in that: The pole piece conveying mechanism also includes a second driving member, and the two clamps include a first clamp and a second clamp. The second driving member is connected to the second clamp and drives the second clamp to move toward the direction close to the first clamp so that the pole piece can be clamped between the first clamp and the second clamp.

13. A thermal composite device, characterized in that: The thermal composite device comprises the pole piece conveying mechanism and the thermal composite roller mechanism according to any one of claims 1 to 12, wherein the pole piece conveying mechanism is configured to convey the pole piece to the thermal composite roller mechanism, and the thermal composite roller mechanism is configured to thermally roll the pole piece and the diaphragm to form a thermally composite pole piece assembly.

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