Pole piece conveying belt, pole piece conveying system and cutting and stacking machine
By setting negative pressure holes on the electrode conveyor belt and connecting them with independent cavities, the friction coefficient is optimized, the offset problem caused by the wavy edges of the electrodes is solved, and stable conveying and efficient production are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-27
AI Technical Summary
In the lithium battery manufacturing process, the wavy edges of the electrode sheets cause serious displacement during transportation, affecting production line yield and product yield, while also increasing the risk of damage.
Design an electrode conveyor belt, including setting negative pressure holes on the track and plate body and connecting them with independent negative pressure chambers, to optimize the friction coefficient and negative pressure distribution by adsorbing the middle and side parts of the electrode through negative pressure, and to ensure stable conveying.
It effectively prevents electrode misalignment, reduces the risk of damage, improves production line yield and output, and enhances the stability and production efficiency of electrode conveying.
Smart Images
Figure CN224053174U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery production equipment technical field especially relates to pole piece conveying belt, pole piece conveying system and cutting and folding machine. BACKGROUND
[0002] In the manufacturing process of lithium batteries, the compaction density of the electrode has a crucial influence on the capacity and rate performance of the battery. In order to improve the energy density and rate performance of the battery, a high compaction density design is usually adopted. However, this design method will cause the difference in ductility between the coated area and the uncoated area (i.e. the foil area) of the positive pole piece under high pressure conditions, thereby generating a wavy edge in the edge part of the pole piece.
[0003] The cutting and folding machine, as a key equipment in the manufacturing process of lithium batteries, is mainly responsible for the cutting, folding and automatic processing of related procedures of the pole piece. During the conveying process of the cutting and folding machine, due to the limited adsorption area and the adsorption force provided by the negative pressure of the track area, the pole pieces with wavy edges are prone to serious deviation, which not only seriously affects the yield of the production line, but also reduces the yield of the product. Although the deviation problem of the pole pieces with wavy edges can be alleviated to some extent by increasing the negative pressure of the conveying track, this will increase the risk of damaging the pole pieces, because the increase of local negative pressure may cause damage to the pole pieces. SUMMARY
[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a pole piece conveying belt, a pole piece conveying system and a cutting and folding machine, which aims to effectively prevent the deviation of the pole piece during the conveying process by optimizing the design of the conveying belt, while reducing the risk of damaging the pole pieces due to the increase of negative pressure.
[0005] The utility model adopts the technical scheme that:
[0006] A pole piece conveying belt, comprising: a conveying plate, comprising a first plate body and two second plate bodies, the two second plate bodies being connected to opposite sides of the first plate body respectively; the first plate body is provided with a first negative pressure cavity, and the two second plate bodies are each provided with a second negative pressure cavity; the upper surfaces of the two second plate bodies are each provided with a second negative pressure hole, the second negative pressure hole being in communication with the second negative pressure cavity to generate adsorption force on the two side portions of the pole piece; a track is slidably arranged in the first plate body, and the upper surface of the track is provided with a first negative pressure hole, the first negative pressure hole being in communication with the first negative pressure cavity to generate adsorption force on the middle portion of the pole piece.
[0007] According to some embodiments of the utility model, the first negative pressure cavity and the second negative pressure cavity are not in communication with each other.
[0008] According to some embodiments of the present invention, the first negative pressure chamber is provided with multiple first negative pressure pipes, which are not interconnected. Each first negative pressure pipe has multiple first through holes, and the multiple first through holes and multiple first negative pressure holes are connected in a one-to-one correspondence.
[0009] According to some embodiments of the present invention, the second negative pressure chamber is provided with multiple second negative pressure pipes, which are not interconnected, and each second negative pressure pipe is connected to multiple second negative pressure holes.
[0010] According to some embodiments of the present invention, the upper surface of the second plate is provided with a smooth coating.
[0011] According to some embodiments of this utility model, the diameter of the first negative pressure hole and the diameter of the second negative pressure hole are 3mm-6mm.
[0012] According to some embodiments of the present invention, the density of the first negative pressure holes in the track is greater than the density of the second negative pressure holes in the second plate.
[0013] According to some embodiments of the present invention, the upper surface of the first plate is lower than the upper surface of the second plate, and an installation groove is formed between the first plate and the two second plates, and the track is slidably disposed in the installation groove.
[0014] In addition, this utility model also provides an electrode conveying system, including the electrode conveyor belt as described above, and an electrode, wherein the electrode includes a middle portion and two side portions, and the two side portions are respectively connected to the two sides of the middle portion; the middle portion is in contact with the track and moves with the track, and the frictional force between the middle portion and the track is defined as f1; the two side portions are in contact with two second plates in a one-to-one correspondence, and the frictional force between one side portion and one second plate is defined as f. 2， Let f3 be the frictional force between the other side and the other second plate; then f1, f2, and f3 satisfy: ， 0 ≤ f2 + f3 < f1.
[0015] According to some embodiments of this utility model, the coefficient of friction between the middle part and the track is defined as μ1; the coefficient of friction between the side part and the second plate is defined as μ2; then μ1 and μ2 satisfy: μ1 > μ2.
[0016] In addition, this utility model also provides a cutting and stacking machine, including the electrode conveying system described above.
[0017] In summary, the electrode conveyor belt, electrode conveying system, and cutting and stacking machine provided by this utility model have at least the following technical effects:
[0018] On the one hand, by arranging negative pressure holes on the track and the second plate body and respectively communicating with corresponding negative pressure cavities, the overall adsorption of the middle part and the two side parts of the pole piece is realized, and the deviation problem of the pole piece with wavy edges in the conveying process is effectively avoided; on the other hand, the uniform distribution of negative pressure reduces the risk of pole piece damage caused by excessive local negative pressure, improves the yield of the production line, and further improves the stability of the pole piece conveying, reduces the shutdown adjustment and pole piece scrapping caused by deviation, and thus improves the overall yield of the production line. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the pole piece conveying belt of the embodiment of the present application;
[0020] Figure 2 It is a schematic diagram of the state of the pole piece when conveying on the pole piece conveying belt of the embodiment of the present application;
[0021] Figure 3 It is an exploded structural schematic diagram of the pole piece conveying belt of the embodiment of the present application;
[0022] Figure 4 It is a sectional structural schematic diagram of the conveying plate of the embodiment of the present application.
[0023] Among them, the meaning of the reference signs is as follows:
[0024] 1, conveying plate; 11, first plate body; 111, first negative pressure cavity; 1111, first negative pressure pipeline; 1112, first through hole; 112, connecting plate; 113, negative pressure plate; 114, mounting groove; 12, second plate body; 121, second negative pressure cavity; 1211, second negative pressure pipeline; 122, second negative pressure hole; 2, track; 21, first negative pressure hole; 3, pole piece; 31, middle part; 32, side part. DETAILED DESCRIPTION
[0025] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.
[0026] In the description of the present application, it should be pointed out that the directions or position relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific direction, to be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.
[0028] The application will be further described below in further detail with reference to the drawings.
[0029] Please refer to Figures 1 to 4 The embodiment discloses a kind of pole piece conveying belt, including conveying plate 1 and track 2;Conveying plate 1 includes first plate body 11 and two second plate body 12, two second plate body 12 are connected to the opposite sides of first plate body 11 respectively;First plate body 11 is provided with first negative pressure cavity 111, two second plate body 12 are all provided with second negative pressure cavity 121;The upper surface of two second plate body 12 is provided with second negative pressure hole 122, second negative pressure hole 122 is communicated with second negative pressure cavity 121 to generate adsorption force to the two side parts 32 of pole piece 3;Track 2 is slidably arranged in first plate body 11, and the upper surface of track 2 is provided with first negative pressure hole 21, which is communicated with first negative pressure cavity 111 to generate adsorption force to the middle part 31 of pole piece 3.
[0030] The pole piece conveying belt disclosed in the embodiment, on the one hand, by being provided with negative pressure holes on the track 2 and the second plate body 12 and being communicated with corresponding negative pressure cavities respectively, the overall adsorption of the middle part 31 and the two side parts 32 of the pole piece 3 is realized, and the deviation problem of the pole piece 3 with wavy edge in the conveying process is effectively avoided;On the other hand, the uniform distribution of negative pressure reduces the damage risk of the pole piece 3 caused by excessive local negative pressure, and improves the yield of the production line;In addition, the stability of pole piece 3 conveying is improved, the shutdown adjustment and pole piece 3 scrap caused by deviation are reduced, so as to improve the overall yield of the production line.
[0031] As Figure 1 And Figure 3 As shown in the embodiment, preferably, the first negative pressure cavity 111 and the second negative pressure cavity 121 are not communicated with each other. In this way, since the first negative pressure cavity 111 and the second negative pressure cavity 121 are independent of each other, they can be independently controlled by negative pressure, which means that during the conveying of the pole piece 3, the negative pressure values of the two negative pressure cavities can be flexibly adjusted according to the actual needs of the adsorption force of different regions (such as the middle part 31 and the two side parts 32) of the pole piece 3, so as to realize more accurate and efficient adsorption of the pole piece 3;And it can be understood that if the first negative pressure cavity 111 and the second negative pressure cavity 121 are communicated with each other, the negative pressure change of one cavity may affect the other cavity, leading to instability of the adsorption force, and the independent design in the embodiment effectively avoids such negative pressure interference, ensuring the stability and accuracy of the pole piece 3 in the conveying process.
[0032] It should be noted that in some other embodiments, the first negative pressure cavity 111 and the second negative pressure cavity 121 can also be in communication with each other, which can be selected according to actual needs, and is not limited herein.
[0033] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , more preferably, in the present embodiment, a plurality of first negative pressure pipes 1111 are arranged in the first negative pressure cavity 111, the plurality of first negative pressure pipes 1111 are not in communication with each other, each first negative pressure pipe 1111 has a plurality of first through holes 1112, and the plurality of first through holes 1112 and the plurality of first negative pressure holes 21 are in one-to-one correspondence and in communication. In this way, on the one hand, by means of the plurality of first negative pressure pipes 1111 which are not in communication with each other, the distribution of negative pressure on the surface of the track 2 can be more accurately controlled, each pipe works independently, and the uniform distribution of negative pressure in the middle part 31 of the pole piece 3 can be ensured, effectively avoiding the deviation or damage of the pole piece 3 caused by uneven negative pressure; on the other hand, since each first negative pressure pipe 1111 is in communication with the first negative pressure hole 21 through the plurality of first through holes 1112, the stability and reliability of the adsorption force are greatly enhanced, even if one or several through holes are blocked, the other through holes can still maintain negative pressure, ensuring that the pole piece 3 is stably adsorbed.
[0034] It should be noted that in some other embodiments, the plurality of first negative pressure pipes 1111 can also be in communication with each other, which can be selected according to actual needs, and is not limited herein.
[0035] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, more preferably, in the present embodiment, a plurality of second negative pressure conduits 1211 are arranged in the second negative pressure cavity 121, and the plurality of second negative pressure conduits 1211 are not connected to each other, and each second negative pressure conduit 1211 is connected to a plurality of second negative pressure holes 122. In this way, on the one hand, through the plurality of second negative pressure conduits 1211 which are not connected to each other, the extreme control of the distribution of negative pressure on the second plate body 12 can be achieved, and each conduit works independently to ensure that the negative pressure is evenly distributed on both sides 32 of the pole piece 3, effectively avoiding the problem of the edge wave of the pole piece 3 being intensified or deviated due to uneven negative pressure, and the plurality of second negative pressure conduits 1211 which are not connected to each other allow more precise adjustment of the negative pressure, and according to the material, size, wave degree and conveying speed of the pole piece 3 and other parameters, the negative pressure value of each conduit can be flexibly adjusted to ensure the best adsorption effect under different working conditions; on the other hand, since each second negative pressure conduit 1211 is connected to a plurality of second negative pressure holes 122, this design greatly enhances the adsorption force of the edge of the pole piece 3, so that even if the pole piece 3 has a wave edge, it can be stably adsorbed to prevent deviation or falling during the conveying process.
[0036] It should be noted that in some other embodiments, the plurality of second negative pressure conduits 1211 can be connected to each other, which can be selected according to actual needs, and is not limited herein.
[0037] Preferably, in the present embodiment, the upper surface of the second plate body 12 is provided with a smooth coating. In this way, first of all, the smooth coating can significantly reduce the frictional resistance between the pole piece 3 and the second plate body 12, making the pole piece 3 more smooth during the conveying process, reducing wear and heat accumulation caused by friction, thereby prolonging the service life of the pole piece 3 and the pole piece conveying belt; secondly, the smooth coating helps the negative pressure holes better fit the surface of the pole piece 3, reducing the possibility of air leakage, so that the negative pressure can more effectively act on the pole piece 3, improving the adsorption efficiency and stability; thirdly, in some cases, the pole piece 3 may be adhered to the conveying belt due to static electricity or material properties, and the smooth coating can effectively reduce the occurrence of such adhesion, making the pole piece 3 more easily separated during the conveying process, thereby improving the degree of automation and efficiency of the production line; finally, the smooth coating not only makes the surface of the second plate body 12 more smooth and flat, but also reduces the adhesion of stains and impurities, which makes the conveying belt more convenient and fast to clean and maintain, thereby reducing maintenance costs and downtime; in addition, the smooth coating can reduce the scratches and indentations left by the pole piece 3 on the second plate body 12, thereby improving the appearance quality of the product, which is particularly important for the lithium battery manufacturing process which pursues high quality and high precision.
[0038] Preferably, in the present embodiment, the smooth coating can be but is not limited to PTFE or PA or PU, which can be selected according to actual needs, without being uniquely limited herein. PTFE, PA and PU materials are known for their extremely low friction coefficient, which can effectively reduce the frictional resistance between the pole piece 3 and the second plate body 12, ensuring smooth movement of the pole piece 3 during the conveying process. Such lubricating performance not only prolongs the service life of the pole piece 3 and the conveying belt, but also improves the overall efficiency of the production line. In addition, these materials have excellent wear resistance and corrosion resistance, which can maintain their smooth surface during long-term use and are not easily eroded by the material of the pole piece 3 or chemicals in the production environment, which helps to maintain the effective fit of the negative pressure hole and the stability of the negative pressure effect. In addition, PTFE, PA and PU materials have good processing performance and can be easily coated on the upper surface of the second plate body 12. At the same time, they have good adhesion with the material of the second plate body 12 and are not easy to fall off, ensuring the durability and reliability of the coating.
[0039] Preferably, in the present embodiment, the diameter of the first negative pressure hole 21 and the diameter of the second negative pressure hole 122 are 3mm-6mm. In this way, on the one hand, a hole diameter range of 3mm to 6mm can ensure that the negative pressure hole forms an effective negative pressure area on the conveying belt. A hole diameter of this size is neither too large to cause negative pressure leakage nor too small to affect the uniform distribution of negative pressure and the adsorption efficiency. Therefore, this design can maximize the role of negative pressure adsorption and ensure the stability and accuracy of the pole piece 3 during the conveying process. On the other hand, a suitable hole diameter size helps to reduce the processing time and cost of the negative pressure hole, while ensuring efficient operation of the conveying belt during the production process. Since the hole diameter is moderate, the negative pressure system can respond and adjust more quickly, thereby shortening the production cycle and improving production efficiency.
[0040] It should be noted that in some other embodiments, the diameter of the first negative pressure hole 21 and the diameter of the second negative pressure hole 122 can also be set to be less than 3mm or greater than 6mm as needed.
[0041] As shown in Figure 1 and Figure 2 Preferably, in the present embodiment, the density of the first negative pressure hole 21 on the track 2 is greater than the density of the second negative pressure hole 122 on the second plate body 12. In this way, by increasing the density of the first negative pressure hole 21 on the track 2, a more dense negative pressure area can be formed, thereby providing stronger adsorption force to effectively prevent the pole piece 3 from deviating or falling off during the conveying process.
[0042] As shown in Figure 3 and Figure 4As shown, preferably, in the present embodiment, the upper surface of the first plate body 11 is lower than the upper surface of the second plate body 12, and the installation groove 114 is formed between the first plate body 11 and the two second plate bodies 12, and the track 2 is slidingly arranged in the installation groove 114. In this way, on the one hand, by arranging the track 2 in the installation groove 114 formed by the first plate body 11 and the second plate body 12, the stability of the entire conveying structure can be effectively increased, and this design can prevent the track 2 from deviating or jumping during the conveying process, and ensure that the pole piece 3 can be conveyed smoothly and accurately; on the other hand, the design of the installation groove 114 makes the track 2 form a closer contact with the first plate body 11 and the second plate body 12, thereby helping to optimize the negative pressure adsorption effect, and the negative pressure hole can more effectively act on the surface of the track 2 to form a stable negative pressure area, ensuring that the pole piece 3 is fully adsorbed during the conveying process; on the other hand, the design of the installation groove 114 makes the installation and disassembly of the track 2 more convenient, thereby facilitating the maintenance and cleaning of the track 2, and when the surface of the track 2 is worn or contaminated, it can be easily taken out for replacement or cleaning, ensuring the continuity, stability and accuracy of the conveying process.
[0043] As shown in Figure 1 and Figure 2 As shown, preferably, in the present embodiment, the first plate body 11 includes a negative pressure plate 113 and a connecting plate 112, and the two second plate bodies 12 are connected to the two sides of the connecting plate 112, respectively, and the installation groove 114 is formed between the connecting plate 112 and the two second plate bodies 12, and the negative pressure plate 113 is arranged in the installation groove 114, and the first negative pressure cavity 111 is formed in the inside of the negative pressure plate 113, and the upper surface of the negative pressure plate 113 is lower than the upper surface of the second plate body 12, and the track 2 is slidingly connected to the negative pressure plate 113.
[0044] As shown in Figure 3 Figure 4 Figure 3 Figure 4 Figure 2 In addition, the present embodiment also provides a pole piece conveying system, which includes the pole piece conveying belt as described above, and also includes a pole piece 3, the pole piece 3 includes a middle part 31 and two side parts 32, and the two side parts 32 are respectively connected to the two sides of the middle part 31; the side part 32 is in contact with the second plate body 12, and the middle part 31 is in contact with the track 2, and the middle part 31 moves with the track 2, and under the driving of the track 2, the entire pole piece 3 will move relative to the second plate body 12, and during this conveying process, the second plate body 12 adsorbs the side part 32 of the pole piece 3 to avoid deviation of the pole piece 3; in addition, the two side parts 32 of the pole piece 3 are respectively a first side part 32 and a second side part 32, and the parameters between the pole piece 3 and the pole piece conveying belt are defined as follows:
[0045] N1 is defined as the pressure on the middle part 31 received by the track 2;
[0046] N2 is defined as the pressure on the first side part 32 received by the second plate body 12;
[0047] N3 is defined as the pressure on the second side 32 of the second plate 12;
[0048] F1 is defined as the negative pressure of the first negative pressure conduit 1111;
[0049] F2 is defined as the negative pressure of the second negative pressure conduit 1211 in one of the second plates 12;
[0050] F3 is defined as the negative pressure of the second negative pressure conduit 1211 in the other of the second plates 12;
[0051] M1 is defined as the weight of the middle part 31 of the pole piece 3;
[0052] M2 is defined as the weight of the first side 32 of the pole piece 3;
[0053] M3 is defined as the weight of the second side 32 of the pole piece 3
[0054] f1 is defined as the friction between the middle part 31 of the pole piece 3 and the track 2;
[0055] f2 is defined as the friction between the first side 32 of the pole piece 3 and the second plate 12;
[0056] f3 is defined as the friction between the second side 32 of the pole piece 3 and the second plate 12;
[0057] f4 is defined as the traction force on the pole piece 3;
[0058] The above parameters also satisfy the following relationships:
[0059] N1 = F1 + M1;
[0060] N2 = F2 + M2;
[0061] N3 = F3 + M3;
[0062] f1 = μ1 * N1 = f4;
[0063] f2 = μ2 * N2;
[0064] f3 = μ2 * N3;
[0065] 0 ≤ f2 + f3 < f1.
[0066] Thus, when 0 ≤ f2 + f3 < f1 is satisfied, the transport of the pole piece 3 by the track 2 is ensured.
[0067] Further, in the present embodiment, the friction coefficient between the intermediate portion 31 and the track 2 is defined as μ1, and the friction coefficient between the side portion 32 and the second plate body 12 is defined as μ2, and μ1 and μ2 satisfy: μ1>μ2. In this way, on the one hand, the higher friction coefficient μ1 ensures the close contact between the intermediate portion 31 and the track 2, which not only helps the negative pressure suction system to act on the pole piece 3 more effectively, preventing the pole piece 3 from slipping or jumping during the conveying process, but also reduces the surface damage of the pole piece 3 caused by insufficient friction; on the other hand, the relatively low friction coefficient μ2 reduces the friction resistance between the side portion 32 of the pole piece 3 and the second plate body 12, reducing the damage to the pole piece 3 caused by friction during the conveying process, which is of great significance to the protection of the edge of the pole piece 3 and the improvement of the quality of the pole piece 3; finally, by optimizing the setting of the friction coefficient, the pole piece 3 can move more smoothly during the conveying process, reducing the energy consumption and time loss caused by friction resistance. This not only improves the conveying efficiency, but also reduces the production cost.
[0068] In addition, the present embodiment also provides a cutting and stacking machine comprising the pole piece conveying system as described above, which has all the advantages of the pole piece conveying system described above, and will not be described here.
[0069] In summary, the pole piece conveying belt, the pole piece conveying system and the cutting and stacking machine disclosed by the present application can at least bring the following beneficial technical effects:
[0070] 1) By arranging negative pressure holes on the track 2 and the second plate body 12 and respectively communicating with the corresponding negative pressure cavities, the pole piece 3 is fully adsorbed in the intermediate portion 31 and the two side portions 32, effectively avoiding the deviation of the pole piece 3 with wavy edges during the conveying process;
[0071] 2) The uniform distribution of negative pressure reduces the risk of damage to the pole piece 3 caused by excessive local negative pressure, and improves the yield of the production line;
[0072] 3) Since the first negative pressure cavity 111 and the second negative pressure cavity 121 are independent of each other, they can be independently controlled, and the negative pressure values of the two negative pressure cavities can be flexibly adjusted according to the actual needs of the different regions of the pole piece 3, so as to realize more accurate and efficient adsorption of the pole piece 3;
[0073] 4) μ1>μ2, by optimizing the setting of the friction coefficient, the pole piece 3 can move more smoothly during the conveying process, reducing the energy consumption and time loss caused by friction resistance. This not only improves the conveying efficiency, but also reduces the production cost.
[0074] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.
Claims
1. A pole piece conveyor belt, characterized in that The application relates to a polar piece conveying belt, which comprises a conveying plate (1) and a polar piece (3). The conveying plate (1) comprises a first plate body (11) and two second plate bodies (12), the two second plate bodies (12) are respectively connected to opposite sides of the first plate body (11), a first negative pressure cavity (111) is arranged in the first plate body (11), a second negative pressure cavity (121) is arranged in each of the two second plate bodies (12), a second negative pressure hole (122) is arranged on the surface of each of the two second plate bodies (12) and faces the polar piece (3), the second negative pressure hole (122) is in communication with the second negative pressure cavity (121) to generate adsorption force on the two side portions (32) of the polar piece (3), a track (2) is slidably arranged on the first plate body (11), the surface of the track (2) facing the polar piece (3) is provided with a first negative pressure hole (21), the first negative pressure hole (21) is in communication with the first negative pressure cavity (111) to generate adsorption force on the middle portion (31) of the polar piece (3). The first negative pressure cavity (111) and the second negative pressure cavity (121) are not in communication.
2. The pole piece conveyor belt of claim 1, wherein, A plurality of first negative pressure pipelines (1111) are arranged in the first negative pressure cavity (111), the plurality of first negative pressure pipelines (1111) are not in communication, each first negative pressure pipeline (1111) has a plurality of first through holes (1112), and the plurality of first through holes (1112) and the plurality of first negative pressure holes (21) are in one-to-one correspondence and in communication.
3. The pole piece conveyor belt of claim 2, wherein, A plurality of second negative pressure pipelines (1211) are arranged in the second negative pressure cavity (121), the plurality of second negative pressure pipelines (1211) are not in communication, and each second negative pressure pipeline (1211) is in communication with the plurality of second negative pressure holes (122).
4. The pole piece conveyor belt of claim 2, wherein, The upper surface of the second plate body (12) is provided with a smooth coating.
5. The pole piece conveyor belt according to any one of claims 1-4, characterized in that, The diameter of the first negative pressure hole (21) and the diameter of the second negative pressure hole (122) are 3-6 mm.
6. The pole piece conveyor belt of claim 1, wherein, The density of the first negative pressure hole (21) on the track (2) is greater than the density of the second negative pressure hole (122) on the second plate body (12).
7. The pole piece conveyor belt of any one of claims 1 or 2 or 3 or 4 or 6, wherein, The upper surface of the first plate body (11) is lower than the upper surface of the second plate body (12), a mounting groove (114) is formed between the first plate body (11) and the two second plate bodies (12), and the track (2) is slidably arranged in the mounting groove (114).
8. The pole piece conveyor belt of any one of claims 1 or 2 or 3 or 4 or 6, wherein, The application further relates to a polar piece conveying system, which comprises the polar piece conveying belt and the polar piece (3).
9. A pole piece transport system characterized by, The middle portion (31) of the polar piece (3) is in contact with the track (2) and moves along the track (2), the friction force between the middle portion (31) and the track (2) is defined as f1, the friction coefficient between the middle portion (31) and the track (2) is defined as mu1, the friction coefficient between the side portion (32) and the second plate body (12) is defined as mu2, and mu1 and mu2 satisfy the relationship mu1>mu2. The application further relates to a polar piece conveying system, which comprises the polar piece conveying belt and the polar piece (3). Two of the side portions (32) are in contact with two of the second plate bodies (12) one by one, defining a friction force f2 between one of the side portions (32) and one of the second plate bodies (12) 2， , defining a friction force f3 between the other side portion (32) and the other second plate body (12); then f1, f2 and f3 satisfy: ， 0 < f2 + f3 < f1.
10. The pole piece delivery system of claim 9, wherein, 11. A cutting stacker, characterized by