Pole piece conveying mechanism and thermal compounding device

Abstract

The utility model 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] This utility model relates to the field of thermal bonding technology, specifically to an electrode conveying mechanism and a thermal bonding device. Background Technology

[0002] In related technologies, thermally bonded electrode assemblies include stacked negative electrode sheets, separators, and positive electrode sheets. The negative and positive electrode sheets are produced by cutting strip-shaped electrode material into individual sheets, which are then transferred to a feed roller assembly via an electrode sheet conveying mechanism and subsequently provided to the thermally bonded roller assembly for thermal bonding. After cutting, the front of each individual electrode sheet tends to droop, making it difficult to transfer them into the feed roller assembly. In some cases, the drooping front of the electrode sheet may even collide with the feed roller assembly, causing the electrode sheet to fold. Utility Model Content

[0003] The present invention provides an electrode conveying mechanism and a thermal bonding device, which can improve the technical problem of electrode sagging at the front during electrode conveying.

[0004] In a first aspect, embodiments of the present invention provide an electrode conveying mechanism, comprising: a feed roller assembly;

[0005] A clamping assembly, configured to clamp the cut electrode sheet and move the electrode sheet;

[0006] The feed roller assembly is adapted to be aligned with the clamping plate assembly through an alignment structure, such that a portion of the clamping plate assembly can be inserted into the feed roller assembly to extend the electrode sheet into the feed roller assembly.

[0007] In one embodiment, the alignment structure includes a cooperating claw and a clearance groove, the claw being disposed on the clamping plate assembly and the clearance groove being disposed on the feed roller assembly.

[0008] In one embodiment, the clamping plate assembly includes two clamping plates, each of which includes at least one of the clamping claws; and / or, the feed roller assembly includes a first feed roller and a second feed roller, the electrode sheet being clamped between the first feed roller and the second feed roller, each of the first feed roller and the second feed roller including at least one clearance groove.

[0009] In one embodiment, both clamps include a plurality of claws, the plurality of claws including a first claw and a second claw, the length of the second claw being greater than the length of the first claw, and the second claw being insertable into the clearance groove.

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

[0011] In one embodiment, the feed roller assembly further includes a guide plate located on the side of the second feed roller near the clamping plate, the guide plate being positioned below the electrode sheet to support the electrode sheet.

[0012] In one embodiment, the guide plate is provided with a clearance portion, which is configured to avoid multiple of the claws.

[0013] In one embodiment, the clearance portion includes a plurality of clearance holes disposed on the guide plate, and the second claw passes through the clearance holes and is inserted into the clearance 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 opposite to the guide plate. The third feed roller is located below the electrode to support the electrode.

[0015] In one embodiment, the electrode conveying mechanism further includes a first driving component connected to the clamping component and driving the clamping component to move toward the feed roller assembly.

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

[0017] In one embodiment, the electrode conveying mechanism further includes a second driving member, and the two clamping plates include a first clamping plate and a second clamping plate. The second driving member is connected to the second clamping plate and drives the second clamping plate to move toward the first clamping plate so that the electrode can be clamped between the first clamping plate and the second clamping plate.

[0018] Secondly, embodiments of this utility model provide a thermal bonding device, which includes the aforementioned electrode conveying mechanism and thermal bonding roller mechanism. The electrode conveying mechanism is configured to convey the electrode to the thermal bonding roller mechanism, and the thermal bonding roller mechanism is configured to press the electrode and the diaphragm into a thermally bonded electrode assembly.

[0019] The beneficial effects of the embodiments of this utility model are as follows:

[0020] In an embodiment of this utility model, the cut electrode sheet is clamped by a clamping assembly, and the feed roller assembly is adapted to be aligned with the clamping assembly through an alignment structure, so that a part of the clamping assembly can be inserted into the feed roller assembly to drive the electrode sheet to move into the feed roller assembly. This ensures that the electrode sheet is always clamped by the clamping assembly during the process of being fed to the feed roller assembly, and that the electrode sheet extends into the feed roller assembly and is clamped by the feed roller assembly, thereby effectively improving the problem of the front part of the electrode sheet sagging during the electrode sheet conveying process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the thermal bonding device provided in an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A magnified view of a portion of the image;

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

[0025] Figure 4 This is a three-dimensional schematic diagram of the electrode conveying mechanism and the thermal composite roller mechanism provided in an embodiment of this utility model;

[0026] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0027] Icon labels:

[0028] 100. Electrode conveying mechanism;

[0029] 1. Feed roller assembly; 11. First feed roller; 12. Second feed roller; 13. Third feed roller; 14. Guide plate; 141. Clearance section; 15. Clearance groove; 16. Feed roller connecting plate;

[0030] 2. Clamping plate assembly; 21. First clamping plate; 22. Second clamping plate; 23. Claw; 231. First claw; 232. Second claw; 233. Third claw; 24. Clamping plate fixing frame;

[0031] 3. Alignment structure;

[0032] 41. First drive assembly; 411. First drive element; 412. Sliding element; 42. Second drive element;

[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 cutting mechanism; 61. Cutting assembly; 62. Dust collection component;

[0035] 8. Thermally composite electrode assembly; 81. First positive electrode; 82. Second positive electrode; Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] In related technologies, thermally bonded electrode assemblies include stacked negative electrode sheets, separators, and positive electrode sheets. The negative and positive electrode sheets are produced by cutting strip-shaped electrode material into individual sheets, which are then transferred to a feeding roller assembly via a feeding mechanism and subsequently provided to the thermal bonding roller assembly for thermal bonding. After cutting, the front of each individual electrode sheet tends to droop, making it difficult to transfer them into the feeding roller assembly. In some cases, the drooping front of the electrode sheet may even collide with the feeding roller assembly, causing the electrode sheet to fold.

[0038] Embodiments of this application provide a thermal recombining device, such as... Figure 1 and Figure 2 As shown, the thermal bonding device includes an electrode cutting mechanism 6, an electrode conveying mechanism 100, and a thermal bonding roller mechanism 5.

[0039] The electrode cutting mechanism 6 includes a cutting component 61 and a dust collection component 62. The cutting component 61 includes a cutter, a cutter drive component, and an encoder. The electrode feeding mechanism provides the strip-shaped electrode to the cutting component. The encoder controls the electrode feeding mechanism to move the electrode strip a fixed distance through a set program. The cutter cuts the strip-shaped electrode into single electrode sheets. The dust collection component 62 is located near the cutter and uses negative pressure to adsorb the dust generated during the cutting of the electrode sheets.

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

[0041] The feed roller assembly 1 and the clamping assembly 2 are provided with an alignment structure 3. The alignment structure 3 allows a part of the clamping assembly 2 to be inserted into the feed roller assembly 1 so that the electrode sheet can be extended into the feed roller assembly. This ensures that the electrode sheet is always clamped by the clamping assembly 2 during the process of being supplied to the feed roller assembly, and that the electrode sheet is extended into the feed roller assembly 1 and clamped by the feed roller assembly 1, thus making it difficult for the front of the electrode sheet to sag.

[0042] In some embodiments, continue to refer to Figure 1 , Figure 2 as well as Figure 4 and Figure 5 The alignment structure 3 includes a cooperating claw 23 and a clearance groove 15. The claw 23 is disposed on the clamping assembly 2, and the clearance groove 15 is disposed on the feed roller assembly 1. A portion of the claw 23 can extend into the clearance groove 15, allowing the clamping assembly 2 to drive the electrode sheet into the interior of the feed roller assembly 1 for full clamping. It is understood that if no alignment structure is provided between the clamping assembly 2 and the feed roller assembly 1, the clamping assembly 2 will collide with the feed roller assembly 1 after moving close to it, thereby damaging the feed roller assembly 1. The clearance groove 15 is provided on the feed roller assembly 1, and the claw 23 is provided on the clamping assembly 2. The claw 23 can extend into the clearance groove 15, thereby driving the electrode sheet into the feed roller assembly 1.

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

[0044] Both sets of clamping assemblies 2 include two clamping plates, namely a first clamping plate 21 and a second clamping plate 22. The first clamping plate 21 is located above the electrode sheet, and the second clamping plate 22 is located below the electrode sheet. The electrode sheet is clamped by the first clamping plate 21 and the second clamping plate 22.

[0045] The first clamping plate 21 and the second clamping plate 22 each include at least one claw 23, and the number of claws 23 can be three, five, or seven. By setting the portion of the first clamping plate 21 and the second clamping plate 22 used to hold the front end of the electrode sheet as a claw structure, the claw structure exerts a smaller clamping force on the electrode sheet compared to the conventional flat plate structure, thus avoiding leaving indentations on the electrode sheet and damaging it.

[0046] In one specific embodiment, the first clamping plate 21 and the second clamping plate 22 each include five jaws. The five jaws include two first jaws 231 located on both sides, a third jaw 233 located in the middle, and a second jaw 232 located between the first jaws 231 and the third jaws 233. The length of the second jaw 232 is greater than the length of the first jaws 231. The second jaw 232 can be inserted into the clearance groove 15 of the feed roller assembly 1.

[0047] In some embodiments, such as Figure 4 and Figure 5 As shown, the difference between the length L2 of the second claw 232 and the length L1 of the first claw 231 is 0.1cm to 1cm. It can be understood that the larger the difference between the length L2 of the second claw 232 and the length L1 of the first claw 231, the longer the second claw 232 can extend into the clearance groove 15 of the feed roller assembly 1. This allows the electrode sheet to extend further into the feed roller assembly 1, enabling it to be placed more stably inside the feed roller assembly 1 and thus improving the problem of electrode tip sagging. However, research has shown that when the difference between the length of the second claw 232 and the length of the first claw 231 is less than 0.1cm, the length of the second claw 232 extending into the clearance groove 15 of the feed roller assembly 1 is shorter, which is not conducive to extending the electrode sheet into the feed roller assembly 1. When the length difference between the second claw 232 and the first claw 231 is greater than 1 cm, the length of the second claw 232 extending into the clearance groove 15 of the feed roller assembly 1 is greater than 1 cm. Correspondingly, the depth of the clearance groove 15 of the feed roller assembly 1 needs to be set to be greater than 1 cm, which will affect the structural strength of the feed roller assembly 1 itself and result in insufficient clamping effect of the feed roller assembly 1 on the electrode sheet. In a specific embodiment, the length difference between the second claw 232 and the first 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, or any value between any two of the above, or a range between any two of the above values.

[0048] In some embodiments, such as Figure 3 As shown, both feed roller assemblies 1 include a first feed roller 11 and a second feed roller 12. The first feed roller 11 is located above the electrode, and the second feed roller 12 is located below the electrode. The electrode is sandwiched between the first feed roller 11 and the second feed roller 12. One of the first feed roller 11 and the second feed roller 12 is connected to a feed roller drive, which can be a cylinder. Taking the first feed roller 11 connected to the feed roller drive as an example, during the process of supplying the electrode to the feed roller assembly 1, the first feed roller 11 and the second feed roller 12 are in a loose state, and the gap between the first feed roller 11 and the second feed roller 12 is large to facilitate the electrode extending between the first feed roller 11 and the second feed roller 12. When the electrode is conveyed by the clamping assembly 2 into the gap between the first feed roller 11 and the second feed roller 12, the feed roller drive drives the first feed roller 11 to move toward the second feed roller 12 so that the electrode is clamped by the first feed roller 11 and the second feed roller 12.

[0049] Two clearance grooves 15 are provided on both the first feed roller 11 and the second feed roller 12. The two clearance grooves 15 are spaced apart. The two second claws 232 on the first clamping plate 21 can extend into the two clearance grooves 15 on the first feed roller 11, and the two second claws 232 on the second clamping plate 22 can extend into the two clearance grooves 15 on the second feed roller 12.

[0050] Both feed roller assemblies 1 include guide plates 14, which are located on the side where the second feed roller 12 is located, and on the side of the second feed roller 12 closest to the clamping assembly 2. The guide plates 14 are positioned below the electrode to support it. Through the support and guiding effect of the guide plates 14, the electrode can enter the gap between the first feed roller 11 and the second feed roller 12. Furthermore, since the electrode is supported by the guide plates 14 before entering the first feed roller 11 and the second feed roller 12, the problem of electrode tip sagging is effectively mitigated.

[0051] In some embodiments, such as Figure 3 As shown, the guide plate 14 is provided with a clearance portion 141, which is configured to avoid the claw 23 structure on the second clamping plate 22, so that the clamping plate assembly 2 can drive the electrode sheet to move toward the interior of the first feed roller 11 and the second feed roller 12. In a specific embodiment, the clearance portion 141 may be a plurality of clearance holes, which extend from one side of the guide plate 14 to the other side.

[0052] In some embodiments, continue to refer to Figure 3The feed roller assembly 1 also includes a third feed roller 13, which is located below the electrode sheet to support it. The third feed roller 13 is spaced apart from the second feed roller 12 and is located on the side of the second feed roller 12 opposite to the guide plate 14. By providing the third feed roller 13 on the other side of the second feed roller 12 to support the electrode sheet, the electrode sheet is supported by the third feed roller 13 as the first feed roller 11 and the second feed roller 12 move the electrode sheet forward.

[0053] The feed roller assembly 1 clamps the cut electrode sheet and drives it into the thermal bonding roller mechanism 5. The thermal bonding roller mechanism 5 includes two thermal bonding roller assemblies, each including a first thermal bonding roller 51 and a second thermal bonding roller 52. The first positive electrode sheet 81, the first diaphragm, the negative electrode sheet, and the second diaphragm are bonded together by the first thermal bonding roller 51 and the second thermal bonding roller 52 through thermal rolling action to form a first thermal bonding electrode sheet assembly. The first diaphragm, the negative electrode sheet, the second diaphragm, and the second positive electrode sheet 82 are bonded together by the first thermal bonding roller 51 and the second thermal bonding roller 52 through thermal rolling action to form a second thermal bonding electrode sheet assembly.

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

[0055] In some embodiments, the electrode conveying mechanism 100 further includes a first driving component 41, which is connected to the clamping component 2 and drives the clamping component 2 to move toward the feed roller assembly 1, so that after clamping the electrode, the clamping component 2 drives the electrode to extend into the feed roller assembly 1.

[0056] In one specific embodiment, the first driving assembly 41 includes a first driving member 411 and a sliding member 412 connected together. The sliding member 412 is connected to the clamping assembly 2 and is configured to drive the clamping assembly 2 under the drive of the first driving member 411. The first driving member 411 may be a linear motor, and the sliding member 412 may be a linear motor slider connected to the linear motor. The clamping assembly 2 includes a clamping plate fixing frame 24, and the first clamping plate 21 and the second clamping plate 22 are both fixed on the clamping plate fixing frame 24. The sliding member 412 is connected to the clamping plate fixing frame 24, and under the drive of the linear motor, the sliding member 412 drives the clamping assembly 2 to move toward the feed roller assembly 1.

[0057] In some embodiments, the electrode conveying mechanism includes a second drive member 42, which is connected to the second clamping plate 22 to drive the second clamping plate 22 to move toward the first clamping plate 21 so that the electrode can be clamped between the first clamping plate 21 and the second clamping plate 22.

[0058] The first drive assembly 41 is connected to the side where the first clamping plate 21 is located, and the second drive component 42 is connected to the side where the second clamping plate 22 is located.

[0059] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pole piece transfer mechanism characterized by, The application relates to a polar sheet conveying mechanism and a hot-combining device. The polar sheet conveying mechanism comprises an inlet roller assembly and a clamping plate assembly. The clamping plate assembly is arranged to clamp and move the polar sheet. The inlet roller assembly is adapted to be aligned with the clamping plate assembly through an alignment structure, so that a part of the clamping plate assembly can be inserted into the inlet roller assembly to extend the polar sheet into the inlet roller assembly.

2. The pole piece transfer mechanism of claim 1, wherein, The alignment structure comprises a cooperating claw and a clearance groove.

3. The pole piece transfer mechanism of claim 2, wherein, The clamping plate assembly comprises two clamping plates, each of which comprises at least one claw.

4. The pole piece transfer mechanism of claim 3, wherein, The inlet roller assembly comprises a first inlet roller and a second inlet roller, and the polar sheet is clamped between the first inlet roller and the second inlet roller.

5. The pole piece transfer mechanism of claim 4, wherein, Each of the two clamping plates comprises a plurality of claws, and the plurality of claws comprises a first claw and a second claw.

6. The pole piece transfer mechanism of claim 4, wherein, The length of the second claw is greater than that of the first claw.

7. The pole piece transfer mechanism of claim 6, wherein, The length difference between the second claw and the first claw is 0.1cm-1cm.

8. The pole piece transfer mechanism of claim 7, wherein, The inlet roller assembly further comprises a guide plate.

9. The pole piece transfer mechanism of claim 6, wherein, The guide plate is located below the polar sheet to support the polar sheet.

10. The pole piece transfer mechanism of claim 2, wherein, The guide plate is provided with a clearance portion.

11. The pole piece transfer mechanism of claim 10, wherein, The clearance portion comprises a plurality of clearance holes on the guide plate.

12. The pole piece transfer mechanism of claim 3, wherein, The second claw passes through the clearance holes and is inserted into the clearance groove.

13. A thermal compounding device characterized by, The inlet roller assembly further comprises a third inlet roller. The third inlet roller is arranged apart from the second inlet roller and is located on the side of the second inlet roller away from the guide plate. The third inlet roller is located below the polar sheet to support the polar sheet. The polar sheet conveying mechanism further comprises a first driving assembly. The first driving assembly is connected to the clamping plate assembly and drives the clamping plate assembly to move towards the inlet roller assembly. The first driving assembly comprises a first driving member and a sliding member connected to each other. The sliding member is connected to the clamping plate assembly and is arranged to drive the clamping plate assembly under the drive of the first driving member. The polar sheet conveying mechanism further comprises a second driving member. The two clamping plates comprise a first clamping plate and a second clamping plate. The second driving member is connected to the second clamping plate and drives the second clamping plate to move towards the first clamping plate so that the polar sheet can be clamped between the first clamping plate and the second clamping plate. The hot-combining device comprises the polar sheet conveying mechanism and a hot-combining roller mechanism. The polar sheet conveying mechanism is arranged to convey the polar sheet to the hot-combining roller mechanism. The hot-combining roller mechanism is arranged to hot-press the polar sheet and a diaphragm to form a hot-combined polar sheet assembly.

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