Pole piece manufacturing apparatus and battery production line

Abstract

The application relates to the technical field of battery production, in particular to a pole piece manufacturing device and a battery production line. The pole piece manufacturing device comprises a film forming system and a powder conveying system. The film forming system comprises at least two rollers, and an extrusion part is arranged between the two rollers. The powder conveying system comprises a material distributing assembly, a straight vibration conveying assembly and a flattening assembly which are sequentially arranged along a powder conveying direction. The material distributing assembly comprises a material distributor. The straight vibration conveying assembly comprises a vibration conveying structure which comprises a material groove and a vibration power piece which are connected with each other. The material groove extends along the powder conveying direction, and the material groove is communicated with the material distributor and the extrusion part respectively. The flattening assembly comprises a flattening piece, and at least part of the flattening piece is arranged in the extrusion part and is used for flattening the powder in the extrusion part. The flattening piece of the pole piece manufacturing device performs flattening treatment on the powder which is about to be formed by rolling, so that the thickness and arrangement of the powder in the extrusion part are uniform, and then the powder is formed by rolling and extrusion, thereby effectively improving the production quality and forming yield of the pole piece.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode manufacturing equipment and a battery production line. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] With the increasing maturity of new energy technologies, new energy vehicles and other electrical equipment are gradually entering the public eye. The core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the entire vehicle.

[0004] Electrode manufacturing equipment is typically used to produce electrodes. The equipment includes a film forming system, which has an extrusion section. The powder in the extrusion section has poor consistency, which can easily lead to unstable film quality. Utility Model Content

[0005] In view of the above problems, this application provides an electrode manufacturing equipment and a battery production line, which solves the problem of poor powder consistency in the extrusion section of the electrode manufacturing equipment in the prior art, which easily leads to unstable film quality.

[0006] A first aspect of this application provides an electrode manufacturing apparatus, the electrode manufacturing apparatus comprising: A film-forming system comprising at least two rolls, wherein an extrusion section is provided between the two rolls; and Powder conveying system, the powder conveying system includes: A material distribution assembly, a direct vibration conveying assembly, and a smoothing assembly are arranged sequentially along the powder conveying direction; The material dispensing assembly includes a material dispenser; The direct vibration conveying assembly includes a vibration conveying structure, which includes a material trough and a vibration power component connected to each other. The material trough extends along the powder conveying direction and is connected to a distributor and an extrusion section. The smoothing assembly includes a smoothing element, at least a portion of which is disposed within the extrusion section for smoothing the powder within the extrusion section.

[0007] The electrode manufacturing equipment of this application embodiment achieves automated, continuous, and precise powder feeding and pre-forming pretreatment through a series structure of a material distribution component, a direct vibration conveying component, and a smoothing component. The vibration feeding mode of the direct vibration conveying structure effectively reduces the probability of powder accumulation, agglomeration, and blockage, ensuring uniform, stable, and uninterrupted powder feeding. The material distributor can quantitatively distribute the powder, precisely controlling the feeding amount and avoiding electrode forming defects caused by excessive or insufficient feeding. Finally, the smoothing component extending into the extrusion section levels the powder to be rolled, ensuring uniform powder thickness and distribution within the extrusion section. This improves the flatness and thickness consistency of the formed electrode from the source. Combined with roller extrusion forming, it significantly reduces defects such as electrode wrinkles, uneven thickness, and material shortages, effectively improving electrode production quality and yield.

[0008] The electrode manufacturing apparatus according to the embodiments of this application also has the following technical features: In some embodiments of this application, the powder conveying system further includes a heating component disposed in the trough to heat the powder in the trough.

[0009] This embodiment of the application, by setting a heating component in the material trough, can perform real-time constant temperature heating and drying of the powder during the conveying process, effectively removing the moisture adsorbed in the powder, preventing the powder from clumping and sticking due to moisture, and ensuring that the powder is in the best conveying state of dryness and looseness; at the same time, when the preheated powder enters the extrusion section for molding, the powder activity and flowability are better, and the powder binding is better, which can improve the density and structural stability of the formed electrode, reduce the problems of electrode porosity and cracking, and significantly improve the electrochemical performance of the electrode and the quality of the finished product.

[0010] In some embodiments of this application, the powder conveying system further includes a dust cover connected to the trough to enclose the trough.

[0011] The dust cover of this application embodiment can completely seal the material trough, effectively preventing dust from overflowing during the powder conveying process. On the one hand, it can prevent workshop environmental pollution and equipment dust accumulation caused by the dispersion of ultrafine powder, improve the production and operation environment, reduce the probability of equipment dust failure, and extend the service life of the equipment. On the other hand, it can prevent external impurities and dust from falling into the material trough and contaminating the powder, improve the purity and cleanliness of the powder, and reduce the risk of impurities mixing into the electrode sheet, causing electrode sheet performance degradation, short circuits, etc., while reducing powder loss and saving production raw material costs.

[0012] In some embodiments of this application, the heating assembly includes at least two spaced heating elements disposed away from the bottom of the trough.

[0013] This application embodiment uses at least two spaced heating elements to achieve multi-point uniform heating of powder inside the trough, solving the problems of local high temperature, uneven heating, and inconsistent dryness and wetness of powder that exist in single-point heating, ensuring that the powder is heated evenly and has high consistency in dryness and wetness throughout the entire conveying process; at the same time, the heating elements are arranged far from the bottom of the trough, so that they can directly act on the flowing powder body and reduce the impact of powder on the heating elements.

[0014] In some embodiments of this application, the powder conveying system further includes a powder processing component, which includes a housing and a sieve. The housing forms a receiving cavity, and the outer surface of the housing is provided with an infeed structure communicating with the receiving cavity. The receiving cavity is provided with a sieve, which is connected to the inner wall of the housing and is used to filter the powder entering from the infeed structure.

[0015] The embodiments of this application form a receiving cavity by enclosing a shell, and provide a feeding structure communicating with the receiving cavity on the outer surface of the shell. A sieve is provided inside the receiving cavity, which is connected to the inner wall of the shell and used to filter the powder entering from the feeding structure. This allows for pre-filtration and screening of the raw powder, effectively intercepting large particle clumps, agglomerated powder, and foreign impurities mixed in the powder, allowing only fine powder with qualified particle size to enter the subsequent conveying and forming processes. This completely solves the problems of particle protrusion, uneven thickness, roller damage, and electrode surface defects caused by large particle powder, greatly improving the regularity of the powder, optimizing the electrode forming quality from the raw material end, and avoiding large particles from clogging subsequent distributors and material troughs, reducing the probability of equipment blockage failures and improving the stability of equipment operation.

[0016] In some embodiments of this application, the powder processing assembly further includes a magnetic adsorption structure disposed within the accommodating cavity and located downstream of the sieve body to adsorb metal particles flowing through the magnetic adsorption structure.

[0017] The embodiments of this application, by setting a magnetic adsorption structure, can perform secondary purification of the sieved powder, which can accurately adsorb trace metal impurities such as iron filings and metal fragments mixed in the powder, solving the industry pain point of metal particles mixed into the powder due to raw material production and equipment wear; the complete removal of metal impurities can effectively eliminate safety hazards such as battery self-discharge, short circuit, and thermal runaway caused by metal foreign objects inside the electrode, greatly improving battery safety and cycle life, while further improving the cleanliness of the powder and ensuring the stability of the electrochemical performance of the electrode.

[0018] In some embodiments of this application, the magnetic adsorption structure includes a first magnetic layer and a second magnetic layer arranged in a layered structure. The first magnetic layer includes at least two first magnetic elements spaced apart along a first direction, and the second magnetic layer includes at least two second magnetic elements spaced apart along a second direction. The first and second directions intersect each other, and the first and second directions intersect with the conveying direction of the powder in the accommodating cavity, respectively.

[0019] The embodiments of this application, by employing a first and second magnetic component arranged in a bidirectional intersecting manner, break through the blind zone limitation of unidirectional adsorption, and intercept flowing metal particles in a multi-dimensional and all-round way. Compared with a single-layer unidirectional adsorption structure, this significantly improves the adsorption coverage and adsorption efficiency of metal impurities. The staggered magnetic components can form a three-dimensional magnetic field adsorption area, prolonging the contact time between the powder and the magnetic field, avoiding the problem of small metal particles not being adsorbed as the powder flows by quickly, significantly improving the iron removal and purification precision of the powder, and adapting to the raw material cleanliness requirements of high-precision electrode production.

[0020] In some embodiments of this application, the magnetic adsorption structure further includes a third magnetic layer, which is disposed on opposite sides of the second magnetic layer. The third magnetic layer includes at least two third magnetic elements spaced apart along a first direction. The third magnetic elements are directed toward the orthogonal projection of the first magnetic layer and are offset from the first magnetic elements along the first direction.

[0021] The embodiments of this application add a third magnetic layer, which, together with the first and second magnetic layers, forms a three-dimensional interlaced magnetic field, filling the adsorption blind spots of single-layer and double-layer magnetic fields. The third magnetic element, projected onto the first magnetic layer, is offset from the first magnetic element along the first direction, enabling full-coverage adsorption of the powder flow channel. It intercepts metal impurities of varying sizes and coarseness without dead angles, further improving the removal capability of trace and ultrafine metal particles, optimizing powder cleanliness, and adapting to the production standards of high-end precision electrodes, fundamentally eliminating battery safety and performance problems caused by metal impurities.

[0022] In some embodiments of this application, the magnetic adsorption structure further includes a fourth magnetic layer, the fourth magnetic layer and the second magnetic layer are respectively disposed on opposite sides of the third magnetic layer, the fourth magnetic layer includes at least two fourth magnetic elements spaced apart along the second direction, the fourth magnetic elements are directed toward the orthogonal projection of the second magnetic layer, and are staggered from the second magnetic elements along the second direction.

[0023] The embodiments of this application, by adding a fourth magnetic layer, can form a four-layer bidirectional staggered magnetic layer, creating an all-round, high-density, blind-zone-free three-dimensional adsorption magnetic field. This constructs a multi-level gradient iron removal structure, enabling repeated, multi-layer deep purification of powder materials. Both large metal fragments and micron-sized ultrafine metal dust can be effectively adsorbed and removed. This greatly improves the upper limit of powder purification of the equipment, adapts to the production requirements of high-purity and high-stability power battery electrode sheets, further enhances the safety and product consistency of electrode sheet production, and improves the market competitiveness of the products.

[0024] In some embodiments of this application, the outer surface of the housing is provided with a discharge structure communicating with the accommodating cavity; the powder conveying system also includes a buffer tank, which is connected to the discharge structure and to the distributor.

[0025] This embodiment of the application connects the powder processing component and the distributor through a buffer tank, which can realize the temporary storage and buffering of qualified powder after purification, solve the problem of fluctuation and interruption of powder supply at the front end, and balance the conveying rhythm of the front and rear processes. It effectively avoids the problems of powder accumulation and overflow caused by excessively fast front-end feeding, or material shortage at the rear end and material shortage in electrode forming caused by insufficient feeding, and ensures that the distributor provides continuous, stable and quantitative feeding, realizes uninterrupted continuous production of electrode sheets, improves the production stability and continuity of the equipment, and is suitable for large-scale production on assembly lines.

[0026] In some embodiments of this application, the powder conveying system further includes an arch-breaking assembly, which includes an arch-breaking knife set and a drive shaft. The arch-breaking knife set is disposed on the drive shaft and located inside the buffer tank, and at least part of the drive shaft is disposed inside the buffer tank.

[0027] Powder in the buffer tank is prone to arching, bridging, and clumping due to its own weight and moisture. In this embodiment, the transmission shaft drives the arch-breaking knife group to rotate continuously, which can break up the arches and clumps of powder in the buffer tank in real time, ensuring that the powder in the buffer tank is loose and flowable, so as to achieve smooth and uniform powder feeding. It can also solve the problems of material blockage, uneven feeding, and material interruption in the buffer tank, ensure the continuous and stable feed rate of the distributor, further improve the powder conveying accuracy and electrode forming consistency, reduce the frequency of equipment shutdown for cleaning, and improve production efficiency.

[0028] In some embodiments of this application, the smoothing component further includes a powder position detector, some of which is located within the extrusion section.

[0029] This application embodiment, by setting a powder position detector located in the extrusion section, can accurately detect the laying position, thickness, and accumulation state of the powder in the extrusion section in real time, and collect the state data of the powder before forming in real time; based on the detection data, it can automatically adjust the smoothing accuracy, feeding speed and feeding amount of the smoothing component and the vibrating conveyor component in conjunction with the other components, to achieve closed-loop precise control, and promptly correct problems such as powder deviation, uneven thickness, and local material shortage / piling, thereby further improving the electrode forming accuracy, realizing intelligent and precise production, significantly reducing human adjustment errors, and improving product yield.

[0030] In some embodiments of this application, the electrode manufacturing equipment includes at least two powder conveying systems, with the troughs of the at least two powder conveying systems arranged side by side.

[0031] This application embodiment sets up at least two powder conveying systems, wherein the material troughs of the at least two powder conveying systems are arranged side by side and work independently. They can simultaneously feed multiple channels and multiple areas of the film forming system, which greatly increases the total amount of powder conveyed and the electrode production capacity, and adapts to the needs of large-scale production. Each group of conveying systems is independently controllable and the feeding parameters can be adjusted separately to adapt to the forming needs of wide-width electrodes and multi-specification electrodes. At the same time, the failure of a single group of powder conveying systems will not affect the normal operation of other groups, reducing the probability of machine downtime and improving the overall operational stability and production adaptability of the equipment.

[0032] A second aspect of this application provides a battery production line, which includes the electrode manufacturing equipment mentioned in the above embodiments.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the structure of an electrode manufacturing apparatus provided for some embodiments of this application (heating components, dust cover and smoothing components are not shown). Figure 2 for Figure 1 A schematic diagram of the powder processing component of the electrode manufacturing equipment shown in the figure; Figure 3 for Figure 2 The diagram shows the powder processing component of the electrode manufacturing equipment from a second-view perspective. Figure 4 for Figure 1 A schematic cross-sectional view of the electrode manufacturing equipment shown along section AA; Figure 5 for Figure 1 A partial structural diagram of the electrode manufacturing equipment shown (with added heating components and smoothing parts). Figure 6 for Figure 5 The diagram shown is a second-view structural schematic of the electrode manufacturing equipment (with an added dust cover).

[0035] The attached figures are labeled as follows: 100. Electrode manufacturing equipment; 10. Film-forming system; 11. Rolls; 111. Extrusion section; 20. Powder conveying system; 21. Material distribution assembly; 211. Material distributor; 22. Direct vibration conveying assembly; 221. Vibrating conveying structure; 2211. Material trough; 2212. Vibrating power component; 23. Smoothing assembly; 231. Smoothing component; 232. Powder position detector; 233. Mounting plate; 24. Heating assembly; 241. Heating component; 25. Dust cover; 26. Powder processing assembly; 261. Housing; 262. Screen body; 263. Receiving cavity; 264. Feeding structure; 265. Discharge... Material structure; 266, buckle; 267, vibrator; 268, handle; 27, magnetic adsorption structure; 271, first magnetic layer; 2711, first magnetic component; 272, second magnetic layer; 2721, second magnetic component; 273, third magnetic layer; 2731, third magnetic component; 274, fourth magnetic layer; 2741, fourth magnetic component; 275, fifth magnetic layer; 2751, fifth magnetic component; 28, buffer tank; 29, arch-breaking assembly; 291, arch-breaking knife assembly; 292, drive shaft; 30. Install columns; XX, First Direction; YY, second direction. Detailed Implementation

[0036] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0037] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0038] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0042] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0045] The battery devices described in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. Such electrical equipment can be composed of battery cells and battery devices as described in this application.

[0046] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0047] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all batteries including housings and electrical equipment using batteries.

[0048] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0050] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0051] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0052] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0053] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0054] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0055] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0056] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0057] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. Current collectors without the positive active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. Current collectors without the negative active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0058] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0059] Electrode manufacturing equipment is typically used to produce electrodes. The equipment includes a film forming system, which has an extrusion section. The powder in the extrusion section has poor consistency, which can easily lead to unstable film quality.

[0060] To address this problem, embodiments of this application propose an electrode manufacturing apparatus. The apparatus includes a film-forming system and a powder conveying system. The film-forming system includes at least two rollers, with an extrusion section between the rollers. The powder conveying system includes a material distribution component, a direct vibration conveying component, and a smoothing component arranged sequentially along the powder conveying direction. The material distribution component includes a distributor. The direct vibration conveying component includes a vibrating conveying structure, which includes an interconnected material trough and a vibrating power component. The material trough extends along the powder conveying direction and is connected to both the distributor and the extrusion section. The smoothing component includes smoothing elements, at least partially located within the extrusion section, for smoothing the powder within the extrusion section. The electrode manufacturing apparatus of this application, by arranging the material distribution component, direct vibration conveying component, and smoothing component in series, achieves automated, continuous, and precise powder conveying and pre-forming treatment. The vibration feeding mode based on the direct vibration conveyor structure can effectively reduce the probability of powder accumulation, agglomeration, and blockage, ensuring uniform, stable, and uninterrupted powder conveying. The distributor can realize quantitative distribution of powder, accurately control the feeding amount, and avoid electrode forming defects caused by excessive or insufficient feeding. Finally, the leveling part that extends into the extrusion section is used to level the powder that is about to be rolled, so that the thickness and distribution of powder in the extrusion section are uniform, improving the flatness and thickness consistency of electrode forming from the source. Combined with the roller extrusion forming, it greatly reduces defects such as electrode wrinkles, uneven thickness, and material shortage, effectively improving the electrode production quality and forming yield.

[0061] The electrode manufacturing equipment described in the embodiments of this application is used in the production process of battery devices, and can also be used in other products that extrude powder.

[0062] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0063] The first aspect of this application provides an electrode manufacturing apparatus 100, such as... Figures 1 to 4 As shown, Figure 1 A schematic diagram of the structure of an electrode manufacturing apparatus 100 provided for some embodiments of this application (heating component 24, dust cover 25 and smoothing component 231 are not shown). Figure 2 for Figure 1 The schematic diagram of the powder processing component 26 of the electrode manufacturing equipment 100 shown is shown. Figure 3 for Figure 2 The diagram shows the powder processing component 26 of the electrode manufacturing equipment 100 from a second-view perspective. Figure 4 for Figure 1 The diagram shows a cross-sectional view of the electrode manufacturing equipment 100 along section AA. The electrode manufacturing equipment 100 includes a film forming system 10 and a powder conveying system 20. The film forming system 10 includes at least two rollers 11, with an extrusion section 111 between the two rollers 11. The powder conveying system 20 includes a material distribution assembly 21, a direct vibration conveying assembly 22, and a smoothing assembly 23 arranged sequentially along the powder conveying direction. The material distribution assembly 21 includes a distributor 211. The direct vibration conveying assembly 22 includes a vibration conveying structure 221, which includes a material trough 2211 and a vibration power component 2212 connected to each other. The material trough 2211 extends along the powder conveying direction, which is horizontal. The material trough 2211 is connected to the distributor 211 and the extrusion section 111. The smoothing assembly 23 includes a smoothing component 231, at least part of which is located within the extrusion section 111 for smoothing the powder within the extrusion section 111.

[0064] It should be noted that the extension direction of the two rolls 11 here is the same as... Figure 1 The XX direction is the same. An extrusion section 111 is provided between the two rollers 11. After the powder enters the extrusion section 111, the two rollers 11 apply pressure to the powder falling into the extrusion section 111 and extrude the powder into a film.

[0065] In addition, the vibration conveying structure 221 of the direct vibration conveying assembly 22 can be one, two or more. Each vibration conveying structure 221 can adjust the vibration frequency and amplitude according to actual needs, so that the powder can be conveyed to the extrusion section 111 evenly and stably. Each vibration conveying structure 221 includes a material trough 2211 and a vibration power component 2212, which can effectively ensure the continuity of powder conveying and avoid powder interruption or unstable feeding during the conveying process, thereby affecting the forming quality of the diaphragm.

[0066] The electrode manufacturing equipment 100 of this application embodiment achieves automated, continuous, and precise powder feeding and pre-forming pretreatment through a series structure of a material distribution component 21, a direct vibration conveying component 22, and a smoothing component 23. The vibration feeding mode of the direct vibration conveying structure effectively reduces the probability of powder accumulation, agglomeration, and blockage, ensuring uniform, stable, and uninterrupted powder feeding. The material distributor 211 can quantitatively distribute the powder, precisely controlling the feeding amount and avoiding electrode forming defects caused by excessive or insufficient feeding. Finally, the smoothing component 231 extending into the extrusion section 111 levels the powder to be rolled, ensuring uniform powder thickness and distribution within the extrusion section 111. This improves the flatness and thickness consistency of the formed electrode from the source. Combined with the extrusion forming by the rollers 11, this significantly reduces defects such as electrode wrinkles, uneven thickness, and material shortages, effectively improving electrode production quality and yield.

[0067] Optionally, the smoothing component 231 may adopt a high-frequency vibration structure to smooth the powder through vibration.

[0068] In some embodiments of this application, such as Figure 5 As shown, Figure 5 for Figure 1 The schematic diagram of a partial structure of the electrode manufacturing equipment 100 shown (with the addition of a heating component 24 and a smoothing component 231) shows that the powder conveying system 20 also includes a heating component 24, which is disposed in the material trough 2211 to heat the powder in the material trough 2211.

[0069] The heating component 24 here can be an electromagnetic heating structure or an electric heating structure to heat the powder in the material tank 2211.

[0070] In this embodiment, by setting a heating component 24 in the material tank 2211, the powder material during the conveying process can be heated and dried in real time at a constant temperature. This effectively removes the moisture adsorbed in the powder material, prevents the powder material from clumping and sticking due to moisture, and ensures that the powder material is in the best conveying state of being dry and loose. At the same time, when the preheated powder material enters the extrusion section 111 for molding, the powder activity and flowability are better, and the powder material binding is better. This can improve the density and structural stability of the formed electrode, reduce the problems of electrode porosity and cracking, and significantly improve the electrochemical performance of the electrode and the quality of the finished product.

[0071] In some embodiments of this application, such as Figure 5 As shown, the heating assembly 24 includes at least two spaced heating elements 241, which are located away from the bottom of the trough 2211.

[0072] The heating element 241 here can be an electric heating rod or an electric heating wire, which heats the powder through radiative heat transfer. The heating element 241 is located above the material tank 2211, and the heating element 241 is spaced apart along the flow direction of the powder. The electric heating element 241 here can be connected to the side wall of the material tank 2211 or located at the top of the material tank 2211.

[0073] This embodiment of the application uses at least two spaced heating elements 241 to achieve multi-point uniform heating of the powder inside the material tank 2211, which solves the problems of local high temperature, uneven heating, and inconsistent dryness and wetness of the powder that exist in single-point heating, and ensures that the powder is heated evenly and has high consistency in dryness and wetness throughout the entire conveying process; at the same time, the heating elements 241 are arranged away from the bottom of the tank, so that they can directly act on the main body of flowing powder and reduce the impact of powder on the heating elements 241.

[0074] In some embodiments of this application, such as Figure 6 As shown, Figure 6 for Figure 5The electrode manufacturing equipment 100 shown is a structural schematic diagram from a second perspective (with the addition of a dust cover 25). The powder conveying system 20 also includes a dust cover 25, which is connected to the material trough 2211 to seal the powder inside the material trough 2211.

[0075] The dust cover 25 here can be made of transparent material to facilitate observation of the state of the powder in the material trough 2211. Considering that the material trough 2211 is a rectangular groove, the dust cover 25 here can be a plate structure that directly seals the opening of the rectangular groove.

[0076] The dust cover 25 of this embodiment can completely seal the material trough 2211, effectively preventing dust from overflowing during the powder conveying process. On the one hand, it can prevent workshop environmental pollution and equipment dust accumulation caused by the dispersion of ultrafine powder, improve the production operation environment, reduce the probability of equipment dust failure, and extend the service life of the equipment. On the other hand, it can prevent external impurities and dust from falling into the material trough 2211 and contaminating the powder, improve the purity and cleanliness of the powder, and reduce the risk of impurities mixing into the electrode, causing electrode performance degradation, short circuits, etc., while reducing powder loss and saving production raw material costs.

[0077] In some embodiments of this application, such as Figure 4 As shown, the powder conveying system 20 also includes a powder processing component 26. The powder processing component 26 includes a housing 261 and a screen 262. The housing 261 forms a receiving cavity 263. The outer surface of the housing 261 is provided with an infeed structure 264 that communicates with the receiving cavity 263. The receiving cavity 263 is provided with a screen 262. The screen 262 is connected to the inner wall of the housing 261 and is used to filter the powder entering from the infeed structure 264.

[0078] The circumferential surface of the sieve body 262 is connected to the inner wall of the housing 261, which can be a detachable connection. The sieve body 262 is provided with through holes to filter powder, preventing larger powder particles from passing through. The through holes are circular and can be selected within the range of 0.5mm to 10mm according to the characteristics of the powder.

[0079] The embodiments of this application form a receiving cavity 263 by enclosing a housing 261, and provide a feeding structure 264 communicating with the receiving cavity 263 on the outer surface of the housing 261. A sieve 262 is provided inside the receiving cavity 263. The sieve 262 is connected to the inner wall of the housing 261 and is used to filter the powder entering from the feeding structure 264. This allows for pre-filtration and screening of the raw powder, effectively intercepting large particle clumps, agglomerated powder, and foreign impurities mixed in the powder, allowing only fine powder with qualified particle size to enter the subsequent conveying and forming processes. This completely solves the problems of particle protrusion, uneven thickness, roller 11 damage, and electrode surface defects caused by large particle powder, greatly improving the regularity of the powder, optimizing the electrode forming quality from the raw material end, and avoiding large particles from clogging the subsequent distributor 211 and material trough 2211, reducing the probability of equipment blockage failure, and improving the stability of equipment operation.

[0080] It should be noted that the powder processing assembly 26 here also includes a vibrator 267, which is connected to the outer surface of the housing 261 and can vibrate the powder in the accommodating cavity 263. Furthermore, the housing 261 adopts a structure of multiple interconnected plates, with adjacent plates connected by snap-fit ​​fasteners 266 for easy disassembly of the housing 261. Additionally, a handle 268 can be provided on the surface of the housing 261 for easy movement of its position.

[0081] In some embodiments of this application, such as Figure 4 As shown, the powder processing assembly 26 also includes a magnetic adsorption structure 27, which is disposed in the accommodating cavity 263 and located downstream of the sieve body 262 to adsorb metal particles flowing through the magnetic adsorption structure 27.

[0082] The magnetic adsorption structure 27 here can be made of magnetic material and has magnetic adsorption function to adsorb metal particles in the powder. The magnetic adsorption structure 27 can be a plate structure with perforations, through which the powder can pass.

[0083] The embodiments of this application, by setting up a magnetic adsorption structure 27, can perform secondary purification on the sieved powder, which can accurately adsorb trace metal impurities such as iron filings and metal fragments mixed in the powder, solving the industry pain point of metal particles mixed into the powder due to raw material production and equipment wear; the complete removal of metal impurities can effectively eliminate safety hazards such as battery self-discharge, short circuit, and thermal runaway caused by metal foreign objects inside the electrode, greatly improving the safety and cycle life of the battery device, while further improving the cleanliness of the powder and ensuring the stability of the electrochemical performance of the electrode.

[0084] In some embodiments of this application, such as Figure 4As shown, the magnetic adsorption structure 27 includes a first magnetic layer 271 and a second magnetic layer 272 arranged in a layered structure. The first magnetic layer 271 includes at least two first magnetic elements 2711 spaced apart along a first direction, and the second magnetic layer 272 includes at least two second magnetic elements 2721 spaced apart along a second direction. The first direction and the second direction intersect each other, and the first direction and the second direction intersect each other with the conveying direction of the powder in the accommodating cavity 263.

[0085] Both the first magnetic component 2711 and the second magnetic component 2721 can be constructed using magnetic rods, wherein the first direction can be... Figure 1 In the XX direction, the second direction can be Figure 2 In the YY direction, the powder conveying direction within the accommodating cavity 263 is from top to bottom, meaning the powder conveying direction within the accommodating cavity 263 is vertical. Specifically, the number of the first magnetic element 2711 can be five, the number of the second magnetic element 2721 can be six, and the number of the third magnetic element 2731 can be five. By using alternating odd and even numbers, a gradient magnetic field is formed to achieve directional adsorption of the powder.

[0086] The embodiments of this application, by employing a first magnetic element 2711 and a second magnetic element 2721 arranged in a bidirectional intersecting manner, break through the blind zone limitation of unidirectional adsorption, and intercept flowing metal particles in a multi-dimensional and all-round way. Compared with a single-layer unidirectional adsorption structure, this significantly improves the adsorption coverage and adsorption efficiency of metal impurities. The staggered magnetic elements can form a three-dimensional magnetic field adsorption area, prolonging the contact time between the powder and the magnetic field, avoiding the problem of small metal particles not being adsorbed as the powder flows by quickly, significantly improving the iron removal and purification precision of the powder, and adapting to the raw material cleanliness requirements of high-precision electrode production.

[0087] In some embodiments of this application, such as Figure 4 As shown, the magnetic adsorption structure 27 also includes a third magnetic layer 273. The third magnetic layer 273 and the first magnetic layer 271 are respectively disposed on opposite sides of the second magnetic layer 272. The third magnetic layer 273 includes at least two third magnetic elements 2731 that are spaced apart along a first direction. The third magnetic elements 2731 are projected toward the first magnetic layer 271 and are offset from the first magnetic elements 2711 along the first direction.

[0088] Here, the third magnetic layer 273 is located below the second magnetic layer 272, and the first magnetic layer 271 is located above the second magnetic layer 272. The extension direction of the third magnetic element 2731 is the same as the extension direction of the first magnetic element 2711. The third magnetic element 2731 is projected toward the first magnetic layer 271 and is offset from the first magnetic element 2711 along the first direction. The embodiments of this application add a third magnetic layer 273, which forms a three-dimensional staggered magnetic field with the first magnetic layer 271 and the second magnetic layer 272, filling the adsorption blind spots of single-layer and double-layer magnetic fields. The third magnetic element 2731 is projected toward the first magnetic layer 271 and is staggered from the first magnetic element 2711 along the first direction, which can fully cover the powder flow channel for adsorption, intercepting metal impurities of different sizes and coarseness without dead angles, further improving the removal capability of trace and ultrafine metal particles, optimizing the cleanliness of the powder, adapting to the production standards of high-end precision electrode sheets, and fundamentally eliminating battery safety and performance problems caused by metal impurities.

[0089] In some embodiments of this application, such as Figure 4 As shown, the magnetic adsorption structure 27 further includes a fourth magnetic layer 274. The fourth magnetic layer 274 and the second magnetic layer 272 are respectively disposed on opposite sides of the third magnetic layer 273. The fourth magnetic layer 274 includes at least two fourth magnetic elements 2741 that are spaced apart along the second direction. The fourth magnetic elements 2741 are projected toward the second magnetic layer 272 and are staggered from the second magnetic elements 2721 along the second direction.

[0090] The fourth magnetic layer 274 is located below the third magnetic layer 273. The extension direction of the fourth magnetic element 2741 is the same as the extension direction of the second magnetic element 2721. The fourth magnetic element 2741 is projected toward the second magnetic layer 272 and is offset from the second magnetic element 2721 along the second direction.

[0091] The embodiments of this application, by adding a fourth magnetic layer 274, can form a four-layer bidirectional misaligned magnetic layer, creating an all-round, high-density, blind-zone-free three-dimensional adsorption magnetic field. This constructs a multi-level gradient iron removal structure, enabling repeated, multi-layer deep purification of powder materials. Both large metal fragments and micron-sized ultrafine metal dust can be effectively adsorbed and removed. This greatly improves the upper limit of powder purification of the equipment, adapts to the production requirements of high-purity and high-stability power battery electrode sheets, further enhances the safety and product consistency of electrode sheet production, and improves the market competitiveness of the products.

[0092] Similarly, the magnetic adsorption structure 27 also includes a fifth magnetic layer 275, which includes a fifth magnetic element 2751. There are multiple fifth magnetic elements 2751. The fifth magnetic layer 275 is located below the fourth magnetic layer 274. The fifth magnetic element 2751 is projected toward the first magnetic layer 271. The fifth magnetic element 2751 and the first magnetic element 2711 can be staggered or directly aligned.

[0093] In some embodiments of this application, such as Figure 4As shown, the outer surface of the housing 261 is provided with a discharge structure 265 that communicates with the accommodating cavity 263; the powder conveying system 20 also includes a buffer tank 28, which is connected to the discharge structure 265 and to the distributor 211.

[0094] The buffer tank 28 here is a component that can buffer powder. The buffer tank 28 can be provided with multiple outlets, each of which is connected to a powder feeder, thereby realizing the function of dispensing materials. The discharge structure 265 here is provided with a discharge port, which is connected to the buffer tank 28.

[0095] In this embodiment, the buffer tank 28 connects to the powder processing component 26 and the distributor 211, which can realize the temporary storage and buffering of qualified powder after purification, solve the problem of fluctuation and interruption of powder supply at the front end, and balance the conveying rhythm of the front and rear processes. It effectively avoids the problems of powder accumulation and overflow caused by excessively fast front-end feeding, or material shortage at the rear end and material shortage in electrode forming caused by insufficient feeding, and ensures that the distributor 211 provides continuous, stable and quantitative feeding, realizes uninterrupted continuous production of electrode sheets, improves the production stability and continuity of the equipment, and is suitable for large-scale production on assembly lines.

[0096] Optionally, the buffer tank 28 can be located inside the material trough 2211, and the buffer capacity of the buffer tank 28 can meet the material needs for continuous production of 100-meter-long electrode sheets.

[0097] In some embodiments of this application, such as Figure 4 As shown, the powder conveying system 20 also includes an arch-breaking assembly 29, which includes an arch-breaking knife set 291 and a drive shaft 292. The arch-breaking knife set 291 is mounted on the drive shaft 292 and located inside the buffer tank 28, with at least a portion of the drive shaft 292 located inside the buffer tank 28. The arch-breaking assembly 29 also includes a power component (not shown), which is electrically connected to the drive shaft 292 and can drive the drive shaft 292 to rotate, thereby causing the arch-breaking knife set 291 mounted on the drive shaft 292 to rotate.

[0098] The drive shaft 292 here can pass through the buffer tank 28. Part of the drive shaft 292 is located inside the buffer tank 28, and the other part of the drive shaft 292 is located outside the buffer tank 28 and is electrically connected to the power unit.

[0099] Specifically, the drive shaft 292 can be located at the discharge position of the buffer tank 28, and the powder can flow out from the position around the drive shaft 292.

[0100] The powder in the buffer tank 28 is prone to arching, bridging, clumping, and blockage due to its own weight and moisture. In this embodiment, the transmission shaft 292 drives the arch-breaking knife group 291 to rotate continuously, which can break up the powder arches and clumps in the buffer tank 28 in real time, ensuring that the powder in the buffer tank 28 is loose and flowable, so as to achieve smooth and uniform powder feeding. It can also solve the problems of blockage, uneven feeding, and material interruption in the buffer tank 28, ensure the continuous and stable feed of the distributor 211, further improve the powder conveying accuracy and electrode forming consistency, reduce the frequency of equipment shutdown for cleaning, and improve production efficiency.

[0101] In some embodiments of this application, such as Figure 5 As shown, the smoothing component 23 also includes a powder position detector 232, part of which is located inside the extrusion section 111.

[0102] It should be noted that the powder position detector 232 here can detect the height of the powder. Each powder conveying system 20 can have two powder position detectors 232. The two powder position detectors 232 are located on both sides of the leveling member 231 and can detect the height of the powder around the leveling member 231.

[0103] This embodiment of the application, by setting a powder position detector 232 located in the extrusion section 111, can accurately detect the laying position, thickness, and stacking state of the powder in the extrusion section 111 in real time, and collect the state data of the powder before molding in real time; it can automatically adjust the smoothing accuracy, feeding speed and feeding amount of the smoothing component 231 and the vibration conveying component according to the detection data, realize closed-loop precise control, and correct powder deviation, uneven thickness, local material shortage / piling problems in a timely manner, further improve the electrode forming accuracy, realize intelligent precision production, significantly reduce human adjustment errors, and improve product yield.

[0104] Optionally, the smoothing component 23 also includes a mounting plate 233, on which the powder position detector 232 and the smoothing component 231 are respectively mounted, which can fix the powder position detector 232 and the smoothing component 231.

[0105] It should be added that during the diaphragm manufacturing process, the powder position detector 232 continuously monitors the height of the powder accumulated at the extrusion section 111 and converts the detected height data into an electrical signal, which is then transmitted to the control module. The powder position detector 232 can be a laser rangefinder, ultrasonic sensor, etc. After receiving the height data from the powder position detector 232, the control module of the electrode manufacturing equipment 100 compares it with a pre-set standard powder height value. If the detected powder height is higher than the standard value, it indicates that too much powder has been fed to the extrusion section 111; if the detected powder height is lower than the standard value, it indicates that insufficient powder has been fed. If the powder height is greater than the maximum powder height, the vibration frequency of the direct vibration conveyor component 22 is reduced to decrease the feeding. If the powder height is less than the minimum powder height, the vibration frequency of the direct vibration conveyor component 22 is increased to increase the feeding. The standard value is half the difference between the maximum and minimum powder heights.

[0106] In some embodiments of this application, such as Figure 1 As shown, there are at least two powder conveying systems 20, wherein the troughs 2211 of at least two powder conveying systems 20 are arranged side by side.

[0107] exist Figure 1 In this system, there are two powder conveying systems 20, or three or more powder conveying systems 20 as needed, and the material troughs 2211 of the powder conveying systems 20 are arranged side by side.

[0108] This application embodiment sets up at least two powder conveying systems 20, wherein the material troughs 2211 of the powder conveying system 20 are arranged side by side and work independently. They can simultaneously feed multiple channels and multiple areas of the film forming system 10, which greatly increases the total amount of powder conveyed and the electrode production capacity, and adapts to the needs of large-scale production. Each group of conveying systems is independently controllable and the feeding parameters can be adjusted separately to adapt to the forming needs of wide-width electrodes and multi-specification electrodes. At the same time, the failure of a single group of powder conveying systems 20 does not affect the normal operation of other groups, reducing the probability of machine downtime and improving the overall operational stability and production adaptability of the equipment.

[0109] Optionally, the electrode manufacturing equipment 100 also includes mounting columns 30, and the number of mounting columns 30 is multiple, which can realize the installation of vibration power components 2212 and buffer tanks 28, etc.

[0110] The production process of the electrode manufacturing equipment 100 here is as follows: dry powder is fed into the receiving cavity 263 through the feeding structure 264. After being filtered by the sieve 262 and adsorbed by the magnetic adsorption structure 27, it passes through the buffer tank 28, the distributor 211 and the direct vibration conveyor assembly 22 before entering the extrusion section 111 for film formation. In the powder conveying direction, the powder first flows from top to bottom and then moves horizontally.

[0111] Embodiments of this application also propose a battery production line, which includes the electrode manufacturing equipment 100 mentioned in the above embodiments. The electrode manufacturing equipment 100 is used for powder conveying and film formation processes in battery devices. The battery production line also includes welding equipment and winding equipment, etc., which are capable of producing battery devices.

[0112] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0113] The first aspect of this application provides an electrode manufacturing apparatus 100, which includes a film forming system 10 and a powder conveying system 20. The film forming system 10 includes at least two rollers 11, wherein an extrusion section 111 is provided between the two rollers 11. The powder conveying system 20 includes a material distribution component 21, a direct vibration conveying component 22, and a smoothing component 23 arranged sequentially along the powder conveying direction. The material distribution component 21 includes a distributor 211. The direct vibration conveying component 22 includes a vibration conveying structure 221, which includes a material trough 2211 and a vibration power component 2212 connected to each other. The material trough 2211 extends along the powder conveying direction and is connected to the distributor 211 and the extrusion section 111. The smoothing component 23 includes a smoothing component 231, at least a portion of which is disposed within the extrusion section 111 for smoothing the powder within the extrusion section 111. Furthermore, the powder conveying system 20 also includes a heating assembly 24, which is disposed within the material trough 2211 to heat the powder within the trough 2211. Furthermore, the powder conveying system 20 also includes a dust cover 25, which is connected to the material trough 2211 to seal the powder within the trough 2211. Furthermore, the heating assembly 24 includes at least two spaced-apart heating elements 241, which are disposed away from the bottom of the material trough 2211. Furthermore, the powder conveying system 20 also includes a powder processing assembly 26, which includes a housing 261 and a sieve 262. The housing 261 forms a receiving cavity 263, and the outer surface of the housing 261 is provided with an inlet structure 264 communicating with the receiving cavity 263. The receiving cavity 263 contains the sieve 262, which is connected to the inner wall of the housing 261 and used to filter the powder entering from the inlet structure 264. Furthermore, the powder processing assembly 26 also includes a magnetic adsorption structure 27, which is disposed within the accommodating cavity 263 and located downstream of the sieve member 262 to adsorb metal particles flowing through the magnetic adsorption structure 27. Further, the magnetic adsorption structure 27 includes a first magnetic layer 271 and a second magnetic layer 272 arranged in a layered structure. The first magnetic layer 271 includes at least two first magnetic elements 2711 spaced apart along a first direction, and the second magnetic layer 272 includes at least two second magnetic elements 2721 spaced apart along a second direction. The first and second directions intersect, and both intersect the powder conveying direction within the accommodating cavity 263. Furthermore, the magnetic adsorption structure 27 also includes a third magnetic layer 273. The third magnetic layer 273 and the first magnetic layer 271 are respectively disposed on opposite sides of the second magnetic layer 272. The third magnetic layer 273 includes at least two third magnetic elements 2731 spaced apart along a first direction. The orthographic projection of the third magnetic element 2731 toward the first magnetic layer 271 is offset from that of the first magnetic element 2711 along the first direction.Furthermore, the magnetic adsorption structure 27 also includes a fourth magnetic layer 274. The fourth magnetic layer 274 and the second magnetic layer 272 are respectively disposed on opposite sides of the third magnetic layer 273. The fourth magnetic layer 274 includes at least two fourth magnetic elements 2741 spaced apart along the second direction. The fourth magnetic elements 2741 are projected toward the second magnetic layer 272 and are staggered from the second magnetic elements 2721 along the second direction. Furthermore, the outer surface of the housing 261 is provided with a discharge structure 265 communicating with the accommodating cavity 263. The powder conveying system 20 also includes a buffer tank 28, which communicates with the discharge structure 265 and with the distributor 211. Furthermore, the powder conveying system 20 also includes an arch-breaking assembly 29, which includes an arch-breaking knife assembly 291 and a drive shaft 292. The arch-breaking knife assembly 291 is disposed on the drive shaft 292 and located inside the buffer tank 28, and at least part of the drive shaft 292 is disposed inside the buffer tank 28. Furthermore, the smoothing component 23 also includes a powder position detector 232, a portion of which is located within the extrusion section 111. Furthermore, the number of powder conveying systems 20 is at least two, with the feed troughs 2211 of the at least two powder conveying systems 20 arranged side-by-side.

[0114] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electrode manufacturing device, characterized in that, The electrode manufacturing equipment includes: A film-forming system comprising at least two rollers, wherein an extrusion section is provided between the two rollers; and A powder conveying system, comprising: A material distribution assembly, a direct vibration conveying assembly, and a smoothing assembly are arranged sequentially along the powder conveying direction; The material dispensing assembly includes a material dispenser; The direct vibration conveying assembly includes a vibration conveying structure, which includes a material trough and a vibration power component connected to each other. The material trough extends along the powder conveying direction and is connected to the distributor and the extrusion section respectively. The smoothing assembly includes a smoothing element, at least a portion of which is disposed within the extrusion section for smoothing the powder within the extrusion section.

2. The electrode manufacturing equipment as described in claim 1, characterized in that, The powder conveying system also includes a heating component, which is disposed in the trough to heat the powder in the trough.

3. The electrode manufacturing equipment as described in claim 2, characterized in that, The powder conveying system also includes a dust cover, which is connected to the trough to seal the trough.

4. The electrode manufacturing equipment as described in claim 3, characterized in that, The heating assembly includes at least two spaced heating elements, which are located away from the bottom of the trough.

5. The electrode manufacturing equipment as described in claim 1, characterized in that, The powder conveying system further includes a powder processing component, which includes a housing and a sieve. The housing forms a receiving cavity, and the outer surface of the housing is provided with an inlet structure communicating with the receiving cavity. The receiving cavity is provided with a sieve, which is connected to the inner wall of the housing and is used to filter the powder entering from the inlet structure.

6. The electrode manufacturing equipment as described in claim 5, characterized in that, The powder processing assembly further includes a magnetic adsorption structure, which is disposed in the accommodating cavity and located downstream of the sieve body to adsorb metal particles flowing through the magnetic adsorption structure.

7. The electrode manufacturing equipment as described in claim 6, characterized in that, The magnetic adsorption structure includes a first magnetic layer and a second magnetic layer arranged in a layered structure. The first magnetic layer includes at least two first magnetic elements spaced apart along a first direction, and the second magnetic layer includes at least two second magnetic elements spaced apart along a second direction. The first direction and the second direction intersect each other, and the first direction and the second direction intersect each other with the conveying direction of the powder in the accommodating cavity.

8. The electrode manufacturing equipment as described in claim 7, characterized in that, The magnetic adsorption structure further includes a third magnetic layer, which is disposed on opposite sides of the second magnetic layer, and the third magnetic layer includes at least two third magnetic elements spaced apart along the first direction. The third magnetic elements are directed toward the orthogonal projection of the first magnetic layer and are offset from the first magnetic elements along the first direction.

9. The electrode manufacturing equipment as described in claim 8, characterized in that, The magnetic adsorption structure further includes a fourth magnetic layer, which is disposed on opposite sides of the third magnetic layer, and the fourth magnetic layer includes at least two fourth magnetic elements spaced apart along the second direction. The fourth magnetic elements are directed toward the orthogonal projection of the second magnetic layer and are offset from the second magnetic elements along the second direction.

10. The electrode manufacturing equipment as described in claim 9, characterized in that, The outer surface of the housing is provided with a discharge structure that communicates with the accommodating cavity; The powder conveying system also includes a buffer tank, which is connected to the discharge structure and the distributor.

11. The electrode manufacturing equipment as described in claim 10, characterized in that, The powder conveying system further includes an arch-breaking assembly, which includes an arch-breaking knife set and a drive shaft. The arch-breaking knife set is mounted on the drive shaft and located inside the buffer tank, and at least part of the drive shaft is located inside the buffer tank.

12. The electrode manufacturing equipment according to any one of claims 1 to 11, characterized in that, The smoothing component also includes a powder position detector, part of which is located within the extrusion section.

13. The electrode manufacturing equipment according to any one of claims 1 to 11, characterized in that, The electrode manufacturing equipment includes at least two powder conveying systems, and the troughs of the at least two powder conveying systems are arranged side by side.

14. A battery production line, characterized in that, Includes the electrode manufacturing equipment as described in any one of claims 1 to 13.

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