Feeding device and dry-method pole piece preparation mechanism

Abstract

The utility model relates to the technical field of dry-method electrode manufacturing, in particular to a feeding device and a dry-method electrode piece preparation mechanism. A feeding device comprises a shell, a first feeding roller, a second feeding roller and a driving assembly, the first feeding roller and the second feeding roller are both rotationally arranged on the shell, a plurality of protruding tooth parts distributed in the circumferential direction are arranged on the first feeding roller and the second feeding roller, and the driving assembly is connected to the first feeding roller and the second feeding roller. And the first feeding roller is driven to rotate in the first rotating direction, the second feeding roller is driven to rotate in the second rotating direction, and the first rotating direction is opposite to the second rotating direction, so that the convex tooth part drives materials to be conveyed to the film forming device from the position between the first feeding roller and the second feeding roller. And the shearing force generated by the single feeding roller on the materials in the tangential direction of the rotation track of the feeding roller can be counteracted, the probability that the materials are accumulated between the convex tooth parts of the feeding roller is greatly reduced, and the continuity and uniformity of material supply are guaranteed.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a feeding device and a dry electrode preparation mechanism. Background Technology

[0002] Battery manufacturing technology encompasses multiple aspects, from the research of fundamental battery principles to actual large-scale production processes. This includes the research and development of battery materials (such as positive electrode materials, negative electrode materials, and electrolytes), the design of battery structures (such as cylindrical, prismatic, and other battery shapes), and the technological processes involved in various production stages. In the entire battery manufacturing process, electrode preparation is a crucial step, as the quality of the electrodes directly affects battery performance, such as capacity, charge / discharge efficiency, and cycle life.

[0003] Dry electrode fabrication is an important method in battery electrode preparation. Compared with wet processes, dry processes have several unique advantages. For example, dry processes do not require the use of large amounts of organic solvents, which helps reduce pollution emissions during production, and energy can be saved during the drying process. The dry electrode fabrication process includes multiple steps such as raw material mixing and calendering. Among these, metering roller feeding is a crucial operational step. Current feeding devices suffer from problems such as uneven feeding, which in turn affects the uniformity of the prepared film thickness. Utility Model Content

[0004] This application discloses a feeding device and a dry electrode preparation mechanism. The material is transported to the pressing device by two metering rollers. The material is not subjected to shearing force by the metering rollers during the falling process, which greatly reduces the probability of material accumulating in the tooth grooves of the metering rollers.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application disclose a feeding device for conveying materials to a film pressing device, the feeding device comprising:

[0006] A housing, wherein the housing has a receiving cavity for receiving the material;

[0007] A first feed roller is rotatably mounted on the housing, and the axis of the first feed roller is arranged along a first horizontal direction;

[0008] The second feed roller is rotatably mounted on the housing. The axis of the second feed roller is arranged along the first horizontal direction and is arranged on the opposite side of the first feed roller along the second horizontal direction. The second horizontal direction is perpendicular to the first horizontal direction. The first feed roller and the second feed roller are provided with a plurality of circumferentially distributed protruding teeth.

[0009] A drive assembly is connected to the first feed roller and the second feed roller. The drive assembly is capable of driving the first feed roller to rotate in a first rotation direction and driving the second feed roller to rotate in a second rotation direction. The first rotation direction and the second rotation direction are opposite, so that the toothed portion drives the material to be conveyed from between the first feed roller and the second feed roller to the film forming apparatus.

[0010] As an optional implementation, the housing includes a first sidewall and a second sidewall disposed opposite to each other along the second horizontal direction, with the first feed roller disposed near the first sidewall and the second feed roller disposed near the second sidewall.

[0011] As an optional implementation, both the first sidewall and the second sidewall are provided with recesses, and the protruding teeth extend into the recesses.

[0012] As an optional implementation, the toothed portion is plate-shaped, and the length direction of the toothed portion extends along the first horizontal direction.

[0013] As an optional implementation, the convex teeth are evenly distributed along the circumference of the first feed roller and the second feed roller.

[0014] As an optional implementation, when the toothed portion rotates between the first feed roller and the second feed roller, there is a preset gap between the toothed portion of the first feed roller and the toothed portion of the second feed roller; or

[0015] When the toothed portion rotates between the first feed roller and the second feed roller, the toothed portion of the first feed roller and the toothed portion of the second feed roller mesh with each other.

[0016] As an optional implementation, the drive assembly includes a drive component and a transmission module, wherein the drive component is connected to the first feed roller and the second feed roller via the transmission module.

[0017] As an optional implementation, the drive unit is disposed outside the housing, and the transmission module passes through the housing and is connected to the first feed roller and the second feed roller.

[0018] As an optional implementation, there are two drive components, which are respectively connected to the first feed roller and the second feed roller via two sets of transmission modules; or

[0019] The driving component is a single unit, which is connected to the first feed roller and the second feed roller respectively via two sets of transmission modules.

[0020] As an optional implementation, the drive unit includes an electric motor, a pneumatic motor, or a hydraulic motor.

[0021] As an optional implementation, the transmission module includes a transmission chain, a transmission belt, a transmission gear, or a magnetic transmission module.

[0022] As an optional implementation, the feeding device further includes a protective cover, which is disposed inside the receiving cavity and covers the transmission module.

[0023] As an optional implementation, the feeding device further includes a detection element disposed within the receiving cavity and electrically connected to the drive assembly. The detection element is used to detect the height of the material accumulated on the film pressing device, so as to control the rotation speed of the first feed roller and the second feed roller driven by the drive assembly.

[0024] As an optional implementation, the detection element is a height measurement sensor.

[0025] As an optional implementation, there are multiple first feed rollers arranged sequentially along the first horizontal direction, and multiple second feed rollers arranged sequentially along the first horizontal direction, with each first feed roller and each second feed roller corresponding one-to-one along the second horizontal direction.

[0026] As an optional implementation, the drive assembly is configured to drive the first feed roller and the second feed roller to rotate at the same speed.

[0027] Secondly, this application discloses a dry electrode preparation mechanism, which includes:

[0028] The feeding device as described in any of the first aspects;

[0029] A film pressing device is provided below the feeding device. The film pressing device is capable of receiving the material falling from the feeding device and is used to press the material into a thin film.

[0030] As an optional implementation, the film pressing device includes two film forming rollers, the axes of which are arranged along the first horizontal direction, and the two film forming rollers are spaced apart along the second horizontal direction. Both film forming rollers can rotate around their own axes to drive the material through the gap between the two film forming rollers to press into the film.

[0031] Compared with the prior art, the beneficial effects of this application are:

[0032] The feeding device provided in this application embodiment is used to convey materials to a film forming device. The feeding device includes a housing, a first feed roller, a second feed roller, and a drive assembly. The housing has a receiving cavity for receiving materials. The first feed roller and the second feed roller are rotatably disposed on the housing, and the axes of the first feed roller and the second feed roller are both arranged along a first horizontal direction. The second feed roller is arranged on the opposite side of the first feed roller along a second horizontal direction, which is perpendicular to the first horizontal direction. The first feed roller and the second feed roller are provided with a plurality of circumferentially distributed protrusions. The drive assembly is connected to the first feed roller and the second feed roller. The drive assembly can drive the first feed roller to rotate along a first rotation direction and drive the second feed roller to rotate along a second rotation direction. The first rotation direction and the second rotation direction are opposite, so that the protrusions carry the materials from between the first feed roller and the second feed roller to the film forming device. When the two feed rollers rotate in opposite directions, the convex teeth on the two feed rollers work together to gradually transport the material from between the feed rollers to the lower part of the housing and onto the pressing device. This can counteract the shearing force in the tangential direction of the feed roller's rotation trajectory exerted by a single feed roller on the material, greatly reducing the probability of material accumulating between the convex teeth of the feed rollers. This ensures the normal operation of the feed rollers and the stable transmission of the material, thereby ensuring the continuity and uniformity of the material supply. This is beneficial for improving the stability of the dry electrode preparation process and enhancing product quality. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a feeding device in the prior art;

[0035] Figure 2 This is a schematic diagram of the feeding device disclosed in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the feeding device disclosed in an embodiment of this application from another perspective.

[0037] Figure 4 This is a schematic diagram of the dry electrode preparation mechanism disclosed in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100-Feeding device; a-Hopper; b-Metering roller; 1-Shell; 1a-Receiving cavity; 11-First sidewall; 11a-Recess; 12-Second sidewall; 2-First feed roller; 21-Protruding tooth; 3-Second feed roller; 4-Drive assembly; 41-Drive component; 42-Transmission module; 5-Protective cover; 6-Detection component; 200-Dry electrode preparation mechanism; 7-Film pressing device; 71-Film forming roller; 8-Material; X-First horizontal direction; Y-Second horizontal direction. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In this application, the terms "upper," "lower," "inner," "outer," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0042] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "installation," "setup," "equipped with," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] Battery manufacturing technology encompasses multiple aspects, from the research of fundamental battery principles to actual large-scale production processes. This includes the research and development of battery materials (such as positive electrode materials, negative electrode materials, and electrolytes), the design of battery structures (such as cylindrical, prismatic, and other battery shapes), and the technological processes involved in various production stages. In the entire battery manufacturing process, electrode preparation is a crucial step, as the quality of the electrodes directly affects battery performance, such as capacity, charge / discharge efficiency, and cycle life.

[0046] Dry electrode fabrication is an important method in battery electrode preparation. Compared with wet processes, dry processes have several unique advantages. For example, dry processes do not require the use of large amounts of organic solvents, which helps reduce pollution emissions during production and saves energy during the drying process. The dry electrode fabrication process includes multiple steps such as raw material mixing and calendering. Among these, metering roller feeding is a crucial operational step. Currently, when the material enters the hopper of the feeding device, most of the material accumulates in the middle of the metering roller along its extension direction, with less material near the two sides. This leads to an imbalance after a period of time, with an excess of material in the middle area and a shortage in the two sides, resulting in uneven feeding and consequently affecting the uniformity of the film thickness.

[0047] To solve the above problems, the inventors further improved the feeding device and designed, as follows: Figure 1 The feeding device shown is as follows. Specifically, a metering roller b is installed inside the hopper a. The metering roller b has serrated sections 21. When material accumulates between two adjacent serrated sections 21, the metering roller b rotates to evenly transport the material between the two adjacent serrated sections 21 to the pressing device 7 below. However, the serrated sections 21 on the metering roller b will form a tangential shearing force on the material, causing the material to stick between the serrated sections 21 of the metering roller b under the influence of the shearing force and making it difficult to detach. Over time, the material will accumulate more and more, affecting the normal operation of the feeding device.

[0048] Based on this, this application discloses a feeding device that uses two metering rollers to transport materials to a film pressing device. The materials will not be subjected to shearing force by the metering rollers as they fall through the metering rollers, which greatly reduces the probability of materials accumulating in the grooves of the metering rollers.

[0049] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0050] Please see Figures 2 to 4 , Figure 2 This is a schematic diagram of the feeding device 100 disclosed in the embodiments of this application. Figure 3 This is a schematic diagram of the feeding device 100 disclosed in an embodiment of this application from another perspective. Figure 4This is a schematic diagram of the dry electrode preparation mechanism 200 disclosed in an embodiment of this application. This application also discloses a feeding device 100 for conveying material 8 to a film pressing device 7. The feeding device 100 includes:

[0051] The housing 1 is a hopper, and the housing 1 has a receiving cavity 1a for receiving material 8. The equipment above will pour the material 8 into the housing 1.

[0052] The first feed roller 2 is rotatably mounted on the housing 1, and the axis of the first feed roller 2 is set along the first horizontal direction X.

[0053] The second feed roller 3 is rotatably mounted on the housing 1. The axis of the second feed roller 3 is set along the first horizontal direction X and along the second horizontal direction Y on the opposite side of the first feed roller 2. The second horizontal direction Y is perpendicular to the first horizontal direction X. The first feed roller 2 and the second feed roller 3 are provided with a plurality of circumferentially distributed protruding teeth 21.

[0054] The drive assembly 4 is connected to the first feed roller 2 and the second feed roller 3. The drive assembly 4 can drive the first feed roller 2 to rotate in a first rotation direction and drive the second feed roller 3 to rotate in a second rotation direction. The first rotation direction and the second rotation direction are opposite, so that the toothed part 21 can carry the material 8 from between the first feed roller 2 and the second feed roller 3 to the film pressing device 7.

[0055] The materials used to prepare dry-process electrodes mainly include electrode active materials, conductive agents, binders, and possible additives. Electrode active materials can be positive electrode active materials, such as lithium iron phosphate (LiFePO4) and lithium nickel manganese cobalt oxide (NMC), or negative electrode active materials, such as graphite and silicon. Commonly used conductive agents include acetylene black and carbon nanotubes to improve the electrode's conductivity. Binders are used to fix the active materials and conductive agents onto the current collector; commonly used binders include polyvinylidene fluoride (PVDF) and its copolymers. In addition, auxiliary materials such as lubricants and plasticizers may be added to improve the processing performance and final electrochemical performance of the electrode film.

[0056] In this way, when the two feed rollers rotate in opposite directions, the convex teeth 21 on the two feed rollers work together to gradually transport the material 8 from between the feed rollers to the lower part of the housing 1 and onto the pressing device 7. This can counteract the shearing force generated by a single feed roller on the material 8 in the tangential direction along the rotation trajectory of the feed roller, greatly reducing the probability of the material 8 accumulating between the convex teeth 21 of the feed rollers. This ensures the normal operation of the feed rollers and the stable transmission of the material 8, thereby ensuring the continuity and uniformity of the material 8 supply. This is beneficial to improving the stability of the dry electrode preparation process and enhancing product quality.

[0057] The aforementioned driving component 4 can be any possible driving method, and this embodiment does not limit it.

[0058] It should be noted that the protruding teeth 21 on the first feed roller 2 and the second feed roller 3 can be two or more, so that the material 8 can be piled up between two adjacent protruding teeth 21. This embodiment does not limit this.

[0059] As an optional implementation method, combined with Figure 2 and Figure 3 The housing 1 includes a first sidewall 11 and a second sidewall 12 disposed opposite to each other along the second horizontal direction Y. Both the first sidewall 11 and the second sidewall 12 extend along the first horizontal direction X. The first feed roller 2 is disposed near the first sidewall 11 and the second feed roller 3 is disposed near the second sidewall 12.

[0060] In this way, the gap between the first feed roller 2 and the first side wall 11 is small, and the gap between the second feed roller 3 and the second side wall 12 is also small. This ensures that the material 8 is conveyed to the film pressing device 7 from between the first feed roller 2 and the second feed roller 3 as much as possible. This effectively controls the flow direction of the material 8, reduces the scattering or deviation of the material 8 during the conveying process, thereby improving the accuracy and consistency of feeding, and further ensuring the uniformity of the material 8 on the film pressing device 7 along the first horizontal direction X.

[0061] In some embodiments, combined with Figure 2 and Figure 3 Both the first sidewall 11 and the second sidewall 12 are provided with recesses 11a, and the protruding teeth 21 partially extend into the recesses 11a. The recesses 11a are concave arc surfaces that are adapted to the shape of the feed rollers. On the one hand, this reduces the collisions between the first feed rollers 2 and 3 and the first sidewalls 11 and 12, respectively, ensuring the stability of the feeding device 100. On the other hand, it ensures that as little material 8 as possible falls from the gap between the feed rollers and the inner sidewall of the housing 1, further improving the uniformity and reliability of the feeding and ensuring the uniformity of the material 8 along the first horizontal direction X on the film pressing device 7.

[0062] In some possible implementations, combined Figure 3 and Figure 4The toothed portion 21 is plate-shaped, and its length extends along the first horizontal direction X. On one hand, this structure helps enhance the stability of the overall structure of the feed roller in the first horizontal direction X. On the other hand, during the material 8 conveying process, it ensures that the material 8 is evenly distributed between adjacent toothed portions 21 along the first horizontal direction X and is conveyed from the first feed roller 2 and the second feed roller 3 to the film-forming device. Compared to toothed portions 21 of other shapes, the plate-shaped toothed portion 21 extending in a specific direction makes the force distribution of the feed roller more uniform during rotation, reducing feed roller swaying or deviation caused by irregular toothed portion 21 structures, thereby ensuring the uniformity and accuracy of material 8 conveying.

[0063] Furthermore, regarding the fit with the inner wall of the housing 1, when the side wall has a recessed portion 11a and the protruding tooth portion 21 partially extends into the recessed portion 11a, the plate-shaped protruding tooth portion 21, which extends along the first horizontal direction X, can better fit against the side wall when it extends into the recessed portion 11a. Since its length direction extends along the first horizontal direction X, the contact with the side wall recessed portion 11a during rotation is more regular and smooth, reducing unnecessary friction and collision between the protruding tooth portion 21 and the side wall, which helps to improve the operating efficiency of the entire feeding device 100 and reduces the possibility of component wear.

[0064] As an optional implementation method, combined with Figure 2 and Figure 3 The protruding teeth 21 are evenly distributed along the circumference of the first feed roller 2 and the second feed roller 3.

[0065] In this way, when conveying material 8, the driving force on material 8 at each circumferential position of the feed roller is basically the same. This ensures that when material 8 passes between the first feed roller 2 and the second feed roller 3, there will be no uneven distribution of the serrations 21, which would result in different amounts of material 8 accumulating between the serrations 21, leading to excessively fast or slow flow rates. For example, if the serrations 21 are too densely distributed in a certain circumferential area, under the premise of a constant feed roller rotation speed, the material 8 accumulated in that area will be transferred to the lower film-forming device 7, while the material 8 accumulation between the serrations 21 in other areas will be insufficient. Uniform distribution avoids this situation, ensuring that material 8 is conveyed to the film-forming device at a uniform flow rate.

[0066] Optionally, when the toothed portion 21 rotates between the first feed roller 2 and the second feed roller 3, there is a preset gap between the toothed portion 21 of the first feed roller 2 and the toothed portion 21 of the second feed roller 3.

[0067] This structure effectively prevents excessive squeezing and collision between the protruding teeth 21 on the first feed roller 2 and the second feed roller 3. During the material 8 conveying process, it avoids severe friction and unnecessary energy loss caused by direct contact of the protruding teeth 21, thereby ensuring the stable rotation of the feed rollers and allowing the material 8 to pass smoothly through the gap and be conveyed to the film forming device. In some cases where the integrity of the material 8 particles is required to be high, the preset gap can prevent the strong squeezing of the protruding teeth 21 from damaging the particle structure of the material 8. Moreover, the preset gap provides a certain space for the flow of the material 8, allowing the material 8 to be naturally driven in the gap according to its own physical characteristics (such as flowability, particle size distribution, etc.), without being excessively restricted by the complete meshing of the protruding teeth 21, which helps to maintain the continuity of material 8 conveying.

[0068] Optionally, when the toothed portion 21 rotates between the first feed roller 2 and the second feed roller 3, the toothed portion 21 of the first feed roller 2 and the toothed portion 21 of the second feed roller 3 mesh with each other.

[0069] The meshing structure allows for precise control of the material 8's conveying rate. Each engagement of the toothed portion 21 accurately drives the material 8, resulting in high accuracy in the material 8's conveying rate. This is crucial for production processes requiring precise measurement of the material 8. The meshing toothed portions 21 enhance the collaborative working ability between the feed rollers. During rotation, the meshing of the toothed portions 21 makes the power transmission between the first feed roller 2 and the second feed roller 3 more direct and effective, ensuring they operate with a stable relative motion relationship and reducing uneven or interrupted material 8 conveying caused by poor power transmission.

[0070] When the toothed portion 21 rotates between the first feed roller 2 and the second feed roller 3, the uniformly distributed toothed portion 21 plays a positive role whether there is a preset gap or they are meshing. When they are meshing, the uniformly distributed toothed portion 21 can ensure that the tightness and stability of the meshing are consistent throughout the circumference; when there is a preset gap, the uniformly distributed toothed portion 21 can make the material 8 pass through the gap more evenly, preventing the material 8 from being locally blocked or passing unevenly at the gap.

[0071] As an optional implementation method, combined with Figures 2 to 4The drive assembly 4 includes a drive component 41 and a transmission module 42. The drive component 41 is connected to the first feed roller 2 and the second feed roller 3 via the transmission module 42. This provides the feeding device 100 with high flexibility in power transmission. Through the transmission module 42, power distribution and precise control of the two feed rollers can be achieved. The rotational speed and torque of the first feed roller 2 and the second feed roller 3 can be controlled by adjusting parameters such as the output power of the drive component 41 and the transmission ratio of the transmission module 42, according to the requirements of the production process. For example, when different material 8 conveying speeds are required or different torques are needed for the feed rollers to overcome the resistance of the material 8, adjustments can be made flexibly through the drive assembly 4. This precise power distribution and control helps ensure stable conveying of the material 8 between the first feed roller 2 and the second feed roller 3, avoiding material 8 accumulation, blockage, or uneven conveying caused by inconsistent feed roller speeds or insufficient torque.

[0072] Furthermore, this structure facilitates maintenance and component replacement when a component malfunctions. If a transmission component in the transmission module 42 wears or is damaged, because it is separate from the drive component 41, the transmission module 42 can be repaired or replaced individually without replacing the entire drive assembly 4. Similarly, if the drive component 41 malfunctions, it can be easily repaired or replaced without affecting the structural integrity of the transmission module 42 and other components such as the feed roller. This helps reduce maintenance costs, shorten equipment downtime, and improve production efficiency.

[0073] It should be noted that the feed roller can be driven by any possible drive unit 41, and this embodiment does not limit this.

[0074] It should also be noted that the transmission module 42 can be any one or more possible transmission components, and this embodiment does not limit this.

[0075] In some optional implementations, combined with Figures 2 to 4 The drive unit 41 is located outside the housing 1, and the transmission module 42 passes through the housing 1 and is connected to the first feed roller 2 and the second feed roller 3.

[0076] This layout helps improve equipment safety because the drive unit 41 may generate heat, vibration, or potential electrical hazards during operation. Placing it outside the housing 1 prevents these hazards from directly affecting the material 8 and other components inside the housing 1. From a stability perspective, separating the drive unit 41 from other components inside the housing 1 reduces the interference of vibrations generated by the drive unit 41 during operation on the feed roller, transmission module 42, and the material 8 conveying process. In a stable state, the feed roller can convey the material 8 more accurately without causing misalignment between the teeth 21 or instability in the material 8 during conveying due to vibrations of the drive unit 41.

[0077] Since the drive component 41 is located outside the housing 1, maintenance personnel can more easily inspect, repair, and maintain it without having to open the housing 1 or operate within the limited space inside, greatly improving maintenance efficiency. The transmission module 42 passes through the housing 1 and connects to the feed roller, giving it an advantage during maintenance as well. If a component in the transmission module 42 needs repair or replacement, the part connected to the drive component 41 can be operated from outside the housing 1, while the part connected to the feed roller can be operated from inside the housing 1. This segmented operation method is more convenient than operating the entire component within the complex housing 1.

[0078] In one embodiment, there are two drive units 41, which are respectively connected to the first feed roller 2 and the second feed roller 3 via two sets of transmission modules 42. This structure allows for independent control of the first feed roller 2 and the second feed roller 3. Under different production requirements, such as when different material 8 conveying speeds or different torques are needed to overcome the resistance of the material 8 on each feed roller, the output parameters of the two drive units 41 can be adjusted separately. In addition, if one drive unit 41 or its corresponding transmission module 42 fails, the other drive unit 41 can still maintain the operation of the corresponding feed roller. Although this may reduce the overall working efficiency, it can prevent the entire feeding device 100 from suddenly stopping, reduce the impact on the production process, and buy time for repairing the faulty component.

[0079] In another embodiment, there is a single drive unit 41, which is connected to the first feed roller 2 and the second feed roller 3 via two sets of transmission modules 42, respectively. This ensures consistency in the power source of the first feed roller 2 and the second feed roller 3, which helps ensure the synchronization of the two feed rollers. This is particularly advantageous for situations requiring precise coordinated operation. When uniformly conveying and accurately metering the material 8, the synchronized rotation of the feed rollers can reduce uneven conveying of the material 8. It also simplifies the power control system. Using a single drive unit 41 reduces the number of power sources in the equipment, thereby reducing the complexity of the equipment and making installation, commissioning, and maintenance more convenient. At the same time, reducing the number of drive units 41 and their related control system components helps reduce the cost of the equipment.

[0080] Optionally, the drive unit 41 includes an electric motor, a pneumatic motor, or a hydraulic motor, etc.

[0081] When the motor is used as the drive component 41, it has precise speed control capabilities. In production scenarios requiring precise control of the feed roller's rotational speed, the motor can achieve accurate speed settings by adjusting parameters such as voltage and frequency. The motor can accurately control the feed roller's rotational speed according to a preset program, thereby ensuring the accuracy of the material conveying rate 8. Motor maintenance is also relatively simple, and the inspection and maintenance costs for electrical components are relatively low.

[0082] Pneumatic motors are characterized by their excellent explosion-proof performance. In working environments containing flammable and explosive materials 8 or gases, using a pneumatic motor as the drive component 41 can significantly reduce safety risks. For example, in the chemical industry, when handling volatile and flammable powdery materials 8, a pneumatic motor driving the feed roller can prevent the risk of explosion caused by sparks from electrical equipment. The pneumatic motor can adjust its output power according to changes in compressed air pressure, and when used in conjunction with the transmission module 42, its relatively stable output characteristics reduce impact on the transmission module 42, extending its service life.

[0083] Hydraulic motors can provide high torque. They excel when handling highly viscous materials 8 or materials requiring significant driving force. When handling highly viscous materials 8, the hydraulic motor provides sufficient torque to drive the feed rollers, ensuring smooth material transport. The hydraulic system provides stable hydraulic oil flow and pressure according to the motor's operating requirements, guaranteeing stable output. When used in conjunction with the transmission module 42, the high torque output of the hydraulic motor can be transmitted to the feed rollers via a suitable transmission module 42, meeting the strong driving force requirements for the material 8.

[0084] Optionally, the transmission module 42 includes a transmission chain, transmission belt, transmission gear, or magnetic transmission assembly.

[0085] The drive chain has a high load-bearing capacity. When large torque needs to be transmitted, such as when handling highly viscous or lumpy materials 8, the drive chain can withstand significant tensile force, ensuring stable power transmission from the drive component 41 to the feed roller. Furthermore, the drive chain has a relatively simple structure, making maintenance and replacement convenient, which is advantageous in production environments where equipment maintenance requirements are not high.

[0086] The transmission gear has a precise transmission ratio. In the feeding device 100, when it is necessary to accurately control the rotational speed ratio of the first feed roller 2 and the second feed roller 3, the transmission gear can achieve precise power distribution by designing a suitable gear ratio. The transmission gear can ensure that the feed rollers rotate at a predetermined speed ratio, thereby ensuring the accurate proportioning of material 8.

[0087] Magnetic drive components enable contactless power transmission. This method avoids wear and energy loss caused by mechanical contact, while also providing relatively precise power transmission. In scenarios where high cleanliness and stability of the equipment are required, magnetic drive components can accurately transmit the power of the drive component 41 to the feed roller without generating impurities or affecting the smooth operation of the equipment due to contact friction.

[0088] As an optional implementation method, combined with Figures 2 to 4 The feeding device 100 also includes a protective cover 5, which is disposed within the receiving cavity 1a and covers the transmission module 42. The protective cover 5 protects the transmission module 42, effectively preventing damage from external factors. In the production environment, the protective cover 5 prevents material 8 from entering the transmission module 42, protecting the metal components of the transmission module 42 from corrosion and extending its service life. When the transmission module 42 is protected, its internal transmission chain, transmission belt, transmission gears, and other components can operate in a relatively stable environment. The entry of material 8 will not cause a sudden increase or decrease in friction between the transmission components, thus ensuring a stable transmission ratio. This allows the first feed roller 2 and the second feed roller 3 to operate stably according to predetermined speed and power requirements, thereby ensuring the stable conveying process of material 8 in the entire feeding device 100.

[0089] In some possible implementations, combined Figure 2 and Figure 3 The feeding device 100 also includes a detection element 6, which is disposed in the receiving cavity 1a. The detection element 6 is electrically connected to the drive assembly 4. The detection element 6 is used to detect the height of the material 8 piled on the film pressing device 7, so as to control the rotation speed of the first feed roller 2 and the second feed roller 3 driven by the drive assembly 4.

[0090] The detection element 6 can precisely adjust the rotation speed of the feed roller driven by the drive component 4 according to the height of the material 8. For example, when the detection element 6 detects that the height of the material 8 is low, it can increase the rotation speed of the feed roller to ensure that the material 8 can be continuously and stably supplied to the film pressing device 7; while when the detection element 6 detects that the height of the material 8 is high, it can reduce the rotation speed of the feed roller to avoid excessive accumulation of material 8 causing blockage or affecting the film pressing quality. This precise control helps to improve product quality. Through the precise monitoring of the height of the material 8 by the detection element 6 and the precise control of the feed roller speed, it is possible to ensure that the produced film has a uniform thickness, meeting the production requirements of high-quality products.

[0091] Furthermore, the precise control of material 8 conveying by the detection component 6 can prevent material 8 from being wasted. Reducing excessive accumulation and waste of material 8 during production can significantly lower raw material costs. The detection component 6's improved equipment operating efficiency and fault prevention can reduce equipment maintenance costs. Fewer equipment malfunctions caused by material 8 blockages reduce the frequency of maintenance. Simultaneously, more stable equipment operation leads to less wear on components, thereby extending the equipment's lifespan and further saving on equipment replacement and maintenance costs.

[0092] In some embodiments, the detection element 6 is a height measurement sensor. This sensor can accurately measure the height of the material 8 accumulated on the film pressing device 7, and the sensor transmits the signal to the drive assembly 4 to control the rotation speed of the first feed roller 2 and the second feed roller 3. During the production process, the height measurement sensor can obtain the material 8 height information in real time, and then adjust it according to the set target height to ensure that the material 8 height is always kept within a suitable range, which is crucial for ensuring the consistency of product quality.

[0093] It is understood that the height measurement sensor can be a photoelectric sensor or an infrared sensor, etc. In the first possible implementation, the photoelectric sensor uses the principle of light reflection or blocking to detect the height of material 8; it has the advantage of non-contact measurement and will not interfere with or contaminate material 8. In the second possible implementation, the infrared sensor can detect the height of material 8 from a longer distance, which is suitable for use in some large production equipment or in environments where it is inconvenient to approach material 8, such as high temperature or hazardous conditions. Material 8 may be corrosive or hot. The infrared sensor can accurately measure the height of material 8 from a safe distance, ensuring the safety of equipment and operators, while also ensuring the normal operation of material 8 conveying. This embodiment does not limit this aspect.

[0094] In some alternative implementations, combined with Figures 2 to 4 There are multiple first feed rollers 2, which are arranged sequentially along the first horizontal direction X. There are multiple second feed rollers 3, which are arranged sequentially along the first horizontal direction X. Each first feed roller 2 and each second feed roller 3 corresponds to each other along the second horizontal direction Y.

[0095] This layout helps to achieve uniform feeding of material 8. The arrangement of multiple feed rollers allows material 8 to be evenly distributed in the first horizontal direction X. When processing raw materials for large-area film production, multiple feed rollers can prevent material 8 from concentrating in one area, ensuring a balanced supply of material 8 throughout the feeding area, thereby improving the uniformity of film quality.

[0096] Multiple feed rollers can work together from different positions to more effectively move material 8 forward, reducing material accumulation or gaps. The speed or operating status of each feed roller can be flexibly adjusted according to the specific characteristics of the material 8. When there is less material 8 in a certain area, the speed of some feed rollers can be appropriately increased, while for areas with more material 8 accumulation, the speed of the feed rollers in that area can be decreased, thus ensuring that the equipment achieves good feeding results when processing various materials 8.

[0097] During equipment operation, if one feed roller malfunctions or wears out, the other feed rollers can still continue to operate, maintaining a certain material conveying capacity. This is crucial in continuous production processes, as it reduces interruptions to the entire production flow due to the failure of a single component. Multiple feed rollers share the pressure of material conveying; compared to a single feed roller bearing greater pressure and wear, the wear of multiple feed rollers is relatively uniform, extending the overall service life of the equipment and reducing maintenance frequency and costs.

[0098] Optionally, the drive assembly 4 is configured to drive the first feed roller 2 and the second feed roller 3 to rotate at the same speed. During the feeding process, when the two feed rollers rotate at the same speed, their driving effect on the material 8 is synchronous and balanced, ensuring that the material 8 is uniformly conveyed downwards between the two feed rollers, preventing material 8 accumulation or gaps caused by one side being conveyed too fast or too slow. The uniformly conveyed material 8 ensures that the film pressing device 7 receives a uniform supply of material 8 across the entire working surface. Thus, the film pressing device 7 does not require additional adjustments due to uneven material 8 supply during film pressing operations, thereby improving the efficiency and quality of film pressing.

[0099] When the two feed rollers rotate at different speeds, additional stress and friction may occur. For example, a faster-rotating feed roller may exert a greater pulling force on the material 8, causing uneven pressure and friction between the material 8 and the surface of the feed roller and the components it contacts (such as sidewalls). When rotating at the same speed, this uneven stress and friction will be greatly reduced, extending the service life of the feed rollers and related components.

[0100] Secondly, combining Figure 3 and Figure 4 This application also discloses a dry electrode preparation mechanism 200, which includes a feeding device 100 as described in the first aspect above and a film pressing device 7. The film pressing device 7 is disposed below the feeding device 100 and can receive the material 8 falling from the feeding device 100. The film pressing device 7 is used to press the material 8 into a thin film.

[0101] The feeding device 100 accurately delivers the material 8 above the pressing device 7, resulting in a more uniform distribution of the material 8 during pressing. In electrode production, a uniform distribution of the material 8 is a key factor in ensuring electrode performance, improving battery charge / discharge performance, and extending battery life. By adjusting the matching relationship between the feeding speed and the pressing speed, defects such as bubbles and wrinkles can be avoided during the pressing process, thereby improving the flatness and density of the electrode and enhancing product quality.

[0102] As an optional implementation, the film pressing device 7 includes two film forming rollers 71. The axis of the film forming rollers 71 is arranged along the first horizontal direction X, and the two film forming rollers 71 are spaced apart along the second horizontal direction Y. Both film forming rollers 71 can rotate around their own axis to drive the material 8 through the gap between the two film forming rollers 71 to press into a film.

[0103] The arrangement of the film-forming rollers 71 provides a defined film-forming space for the material 8. After the material 8 falls from the feeding device 100, it enters the gap between the two film-forming rollers 71. The rotation of the film-forming rollers 71 applies pressure to the material 8, gradually pressing it into a thin film. Under the pressure of the two film-forming rollers 71, the material 8 can form a film with uniform thickness and a smooth surface. Both film-forming rollers 71 can rotate around their own axes, ensuring that the material 8 experiences uniform pressure during the pressing process. Due to the coordinated rotation of the two film-forming rollers 71, the pressure on various parts of the material 8 is relatively consistent as it passes through the gap, which helps improve the quality of the film and reduces uneven film thickness or localized defects.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A feeding device for feeding material to a film pressing device, characterized in that The feeding device comprises: a housing, a containing cavity is arranged in the housing, and the containing cavity is used for containing the material; a first feeding roller, which is rotationally arranged in the housing, and the axis of the first feeding roller is arranged along a first horizontal direction; a second feeding roller, which is rotationally arranged in the housing, and the axis of the second feeding roller is arranged along the first horizontal direction and is arranged on the opposite side of the first feeding roller along a second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, and a plurality of circumferentially distributed protruding tooth portions are arranged on the first feeding roller and the second feeding roller; a driving assembly, which is connected to the first feeding roller and the second feeding roller, and the driving assembly can drive the first feeding roller to rotate along a first rotation direction and drive the second feeding roller to rotate along a second rotation direction, the first rotation direction and the second rotation direction are opposite, so that the protruding tooth portions drive the material to be conveyed from between the first feeding roller and the second feeding roller to the film pressing device.

2. Feeding device according to claim 1, characterized in that The housing comprises a first side wall and a second side wall which are oppositely arranged along the second horizontal direction, the first feeding roller is arranged close to the first side wall, and the second feeding roller is arranged close to the second side wall.

3. A feeding device according to claim 2, characterised in that The first side wall and the second side wall are each provided with a recess portion, and the protruding tooth portions partially extend into the recess portions.

4. The feeding device of claim 1, wherein The protruding tooth portions are plate-shaped, and the length direction of the protruding tooth portions extends along the first horizontal direction.

5. A feeding device according to claim 4, characterized in that The protruding tooth portions are uniformly distributed along the circumferences of the first feeding roller and the second feeding roller.

6. A feeding device according to claim 5, characterized in that When the protruding tooth portions are rotated between the first feeding roller and the second feeding roller, the protruding tooth portions of the first feeding roller and the protruding tooth portions of the second feeding roller have a preset gap; or When the protruding tooth portions are rotated between the first feeding roller and the second feeding roller, the protruding tooth portions of the first feeding roller and the protruding tooth portions of the second feeding roller are engaged.

7. The feeding device of claim 1, wherein The driving assembly comprises a driving member and a transmission module, and the driving member is in transmission connection with the first feeding roller and the second feeding roller through the transmission module.

8. A feeding device according to claim 7, characterized in that The driving member is arranged outside the housing, and the transmission module is connected with the first feeding roller and the second feeding roller through the housing.

9. The feeding device of claim 7, wherein The driving member is two, and the two driving members are in transmission connection with the first feeding roller and the second feeding roller through two groups of transmission modules, respectively; or The driving member is one, and the driving member is in transmission connection with the first feeding roller and the second feeding roller through two groups of transmission modules, respectively.

10. The feeding device of claim 7, wherein The driving member comprises an electric motor, a pneumatic motor or a hydraulic motor.

11. The feeding device of claim 7, wherein The transmission module comprises a transmission chain, a transmission belt, a transmission gear or a magnetic transmission module.

12. The feeding device of claim 8, wherein The feeding device further comprises a protective cover, which is arranged in the containing cavity and covers the transmission module.

13. The feeding device of claim 1, wherein The feeding device further comprises a detection member arranged in the accommodating cavity, the detection member being electrically connected with the driving assembly, and the detection member being used to detect the height of the material accumulated on the film pressing device, so as to control the rotating speed of the first feeding roller and the second feeding roller driven by the driving assembly.

14. A feeding device according to claim 13, characterized in that The detection member is a height measuring sensor.

15. The feeding device of claim 1, wherein, The first feeding roller is provided in plurality, and the plurality of first feeding rollers are arranged in sequence along the first horizontal direction; the second feeding roller is provided in plurality, and the plurality of second feeding rollers are arranged in sequence along the first horizontal direction; and each first feeding roller and each second feeding roller correspond to each other along the second horizontal direction.

16. The feeding device of claim 1, wherein The driving assembly is configured to drive the first feeding roller and the second feeding roller to rotate at the same speed.

17. A dry electrode tab manufacturing mechanism characterized by, The feeding device comprises: The feeding device according to any one of claims 1-16; The film pressing device is arranged below the feeding device, and the film pressing device is capable of receiving the material falling from the feeding device, and the film pressing device is used to press the material into a film.

18. The dry pole production mechanism of claim 17, wherein, The film pressing device comprises two film forming rollers, the axes of the film forming rollers are arranged along the first horizontal direction, and the two film forming rollers are arranged in interval along the second horizontal direction; and the two film forming rollers are both capable of rotating around their own axes to drive the material to pass through the gap between the two film forming rollers and to be pressed into the film.

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