Slurry demagnetizing device and battery production system

Abstract

The utility model provides a slurry demagnetizing device and a battery production system, and belongs to the technical field of batteries. The slurry demagnetizing device comprises a pipe body assembly, a magnetic foreign matter adsorption assembly and a cleaning assembly. The pipe body assembly is provided with a containing cavity used for containing slurry. The magnetic foreign matter adsorption assembly is arranged in the accommodating cavity and is used for adsorbing magnetic foreign matters in the slurry; the cleaning assembly is arranged in the containing cavity and comprises an elastic cleaning piece, and the elastic cleaning piece is attached to at least part of the surface of the magnetic foreign matter adsorption assembly; the elastic cleaning piece is configured to move along the surface of the magnetic foreign matter adsorption assembly under the driving of external force. The elastic cleaning part is attached to at least the surface of the magnetic foreign matter adsorption assembly, and moves along the surface of the magnetic foreign matter adsorption assembly under the driving of external force, so that the effect and efficiency of adsorbing the magnetic foreign matter by the slurry demagnetizing device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a slurry demagnetization device and a battery production system. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of society. Rechargeable batteries have the characteristics of storing energy or releasing energy as needed, and are widely used in various electric devices or energy storage systems. They are an important part of promoting energy transformation and sustainable development. For the new energy industry, battery technology is an important factor for its development.

[0003] In the process of battery production and manufacturing, magnetic foreign matter in the battery slurry can cause the battery to increase self-discharge or even short circuit, thereby affecting the safety of the battery. Therefore, after the positive and negative materials and the conductive agent, binder, solvent and other materials form the battery slurry, the battery slurry needs to be demagnetized to remove the magnetic foreign matter. How to effectively remove the magnetic foreign matter in the battery slurry and ensure the safety of the production process is a technical problem that needs to be solved in the battery technology. UTILITY MODEL CONTENT

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a slurry demagnetization device and a battery production system to improve the effect and efficiency of adsorbing magnetic foreign matter.

[0005] The first aspect of the present application provides a slurry demagnetization device. The slurry demagnetization device comprises a pipe body assembly, a magnetic foreign matter adsorption assembly and a cleaning assembly. The pipe body assembly is provided with a containing cavity for containing the slurry. The magnetic foreign matter adsorption assembly is arranged in the containing cavity and is used to adsorb the magnetic foreign matter in the slurry. The cleaning assembly is arranged in the containing cavity and comprises an elastic cleaning member. The elastic cleaning member is attached to at least part of the surface of the magnetic foreign matter adsorption assembly. The elastic cleaning member is configured to move along the surface of the magnetic foreign matter adsorption assembly under the action of an external force.

[0006] In the technical solution of the present application, the elastic cleaning member is attached to at least part of the surface of the magnetic foreign matter adsorption assembly and moves along the surface of the magnetic foreign matter adsorption assembly under the action of an external force. This can not only realize automatic cleaning of the magnetic foreign matter adsorption assembly, but also reduce the wear of the magnetic foreign matter adsorption assembly. At the same time, it can also reduce the probability of generating metal particles due to mutual wear between the elastic cleaning member and the magnetic foreign matter adsorption assembly, thereby improving the effect and efficiency of the slurry demagnetization device in adsorbing magnetic foreign matter.

[0007] In some embodiments, the magnetic foreign matter adsorption assembly comprises a plurality of magnetic adsorption members, the plurality of magnetic adsorption members are arranged in a nested and spaced manner along the same central axis, and a gap is formed between any two adjacent magnetic adsorption members; the elastic cleaning member is located in the gap and at least partially attached to the surface of the two adjacent magnetic adsorption members. Through the nested and spaced arrangement of the plurality of magnetic adsorption members and the cooperation of the elastic cleaning member in the gap, the adsorption efficiency of the magnetic foreign matter adsorption assembly is improved, and the precise cleaning of foreign matter in the gap is realized.

[0008] In some embodiments, the elastic cleaning member comprises a plurality of annular portions arranged in a coaxial nested manner, and the plurality of annular portions are arranged coaxially and alternately with the plurality of magnetic adsorption members. Through the coaxial and alternate arrangement of the plurality of annular portions and the magnetic adsorption members, the precise matching of the cleaning structure and the adsorption structure is realized, and the overall cleaning efficiency and structural compactness are significantly improved.

[0009] In some embodiments, the magnetic adsorption member comprises a non-magnetic portion and a magnetic portion arranged along the central axis, and along the radial direction of the central axis, a first gap is formed between the non-magnetic portions of the two adjacent magnetic adsorption members, and a second gap is formed between the magnetic portions of the two adjacent magnetic adsorption members; the first gap is larger than the corresponding second gap; the elastic cleaning member is configured to move between the first gap and the second gap under an external force. By utilizing the size difference between the first gap and the second gap, the elastic cleaning member can move between the two gaps, which ensures close contact with the magnetic portion for removing foreign matter during cleaning, and smooth resetting or movement through the first gap in the non-cleaning state.

[0010] In some embodiments, the annular portion comprises an air bag, the air bag comprises a first state after inflation, and the air bag is configured to be in the first state when moving between the first gap and the second gap. By setting the annular portion as an inflatable air bag and adapting to gaps of different sizes by using the first state after inflation, the flexibility and thoroughness of cleaning are further improved.

[0011] In some embodiments, the air bag further comprises a second state after deflation, and the air bag is located in the first gap in the second state. Through the two-state switching of the first state after inflation and the second state after deflation of the air bag, the space utilization and operation convenience of the cleaning assembly are further improved.

[0012] In some embodiments, the cleaning assembly further comprises a gas guide tube for guiding gas into or out of the air bag. By setting the gas guide tube to provide a controllable gas transmission channel for inflation and deflation of the air bag, the convenience and reliability of the switching between the first state and the second state of the air bag are improved.

[0013] In some embodiments, the cleaning assembly further comprises a first connecting member connected with the air guide tube and extending in a direction parallel to the central axis. By arranging the first connecting member extending in a direction parallel to the central axis and connecting the air guide tube, the air guide tube is stable when the air bag moves and can move in a direction parallel to the central axis.

[0014] In some embodiments, the cleaning assembly further comprises a second connecting member connected with the annular part, and the second connecting member is arranged in a circumferential direction of the central axis and spaced apart from the first connecting member in a projection plane perpendicular to the central axis. By adding the second connecting member and arranging it spaced apart from the first connecting member in the circumferential direction, the first connecting member and the second connecting member respectively realize the functional division of supporting the air guide tube and driving the annular part, while optimizing the utilization of the radial space of the device and the force balance.

[0015] In some embodiments, the plurality of magnetic foreign matter absorbing members comprises a magnetic rod and a plurality of magnetic rings, and the magnetic rod is located in the central hole of the innermost magnetic ring. By arranging the magnetic rod and the plurality of magnetic rings in a coaxial nested manner, a three-dimensional magnetic field distribution is formed from the center to the outer periphery of the magnetic foreign matter absorbing assembly, greatly improving the capture range and absorption efficiency of magnetic foreign matter in the slurry.

[0016] In some embodiments, the magnetic ring comprises a plurality of magnetic ring petals in the circumferential direction thereof; and any two adjacent magnetic ring petals have a first gap portion for accommodating the air guide tube. By splitting the magnetic ring into a plurality of magnetic ring petals and arranging a first gap portion between any two adjacent magnetic ring petals, the arrangement problem of the air guide tube in the magnetic ring region is ingeniously solved, which not only ensures the magnetic field integrity of the magnetic ring, but also provides a dedicated accommodation space for the air guide tube, reducing the probability of interference between the air guide tube and the magnetic ring and the air bag.

[0017] In some embodiments, the tube assembly comprises a magnetic ring support located in the first gap portion and abutting against an end face of the magnetic ring petal adjacent to the first gap portion; and the magnetic ring support comprises a second gap portion for accommodating the air guide tube. By adding the magnetic ring support and designing the second gap portion on the magnetic ring support, the fixation problem of the multi-petal magnetic ring is solved, and the smooth arrangement of the air guide tube is continued, forming a dual-function cooperation of magnetic ring petal positioning and air guide tube accommodation, which further improves the stability and compactness of the device structure.

[0018] In some embodiments, the pipe body assembly further comprises a support pipe, an inlet structure and an outlet structure. The inlet structure is connected to one end of the support pipe in the axial direction, and the inlet structure is provided with an inlet opening. The outlet structure is connected to the other end of the support pipe in the axial direction, and the outlet structure is provided with an outlet opening. The magnetic foreign matter adsorption assembly and the elastic cleaning piece are arranged in the support pipe, and the magnetic ring support is connected with the support pipe and the inlet structure. Through the system design of the support pipe bearing, the inlet structure and the outlet structure guiding, the magnetic foreign matter adsorption assembly adsorbing magnetic foreign matter, the magnetic ring support positioning and the elastic cleaning piece cleaning the magnetic foreign matter adsorption assembly, the balance of performance, stability and maintainability is realized, and the device can better adapt to the efficiency demand of industrial mass production on the basis of high precision and high stability.

[0019] In some embodiments, the inlet structure comprises a head and a top plate, the head is detachably installed at the upper end of the top plate, the top plate is connected with the magnetic ring support, and the first connecting piece and the second connecting piece penetrate through the head. By splitting the inlet structure into the head and the top plate, the head is used for buffering and guiding, and the top plate is used for positioning and supporting. The flow field stability of the inlet end and the positioning accuracy of the magnetic foreign matter adsorption unit are improved, and the maintenance convenience is greatly improved, so that the slurry magnetic removal device has more practicality and reliability in industrial applications.

[0020] Embodiments of the second aspect of the application provide a battery production system comprising the slurry magnetic removal device in the above embodiments.

[0021] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0022] In the drawings, identical or similar components or elements are denoted by identical reference numerals throughout the several views, unless otherwise specified. The drawings are not necessarily to scale. It is to be understood that these drawings only depict some embodiments in accordance with the disclosure and should not be considered as limiting the scope of the disclosure.

[0023] Figure 1 Structure diagram of the slurry magnetic removal device of some embodiments of the application;

[0024] Figure 2 Exploded structure diagram of the slurry magnetic removal device of some embodiments of the application;

[0025] Figure 3 Structure diagram of the elastic cleaning piece of some embodiments of the application;

[0026] Figure 4Structure diagram of magnetic foreign matter adsorption assembly for some embodiments of the present application Figure 1 ;

[0027] Figure 5 Structure diagram of magnetic foreign matter adsorption assembly for some embodiments of the present application Figure 2 ;

[0028] Figure 6 Structure diagram of cleaning assembly for some embodiments of the present application

[0029] Figure 7 Structure diagram of magnetic ring support for some embodiments of the present application

[0030] Explanation of reference signs:

[0031] 1000, slurry demagnetization device

[0032] 100, pipe body assembly; 200, magnetic foreign matter adsorption assembly; 300, cleaning assembly

[0033] 110, accommodating cavity; 120, magnetic ring support; 121, second notch part; 130, support pipe; 140, feeding structure; 141, head; 142, top plate; 150, discharging structure

[0034] 210, magnetic adsorption part; 211, magnetic rod; 212, magnetic ring; 2121, magnetic ring petal; 213, first notch part; 220, gap; 221, first gap; 222, second gap; 214, non-magnetic part; 215, magnetic part

[0035] 310, elastic cleaning part; 311, annular part; 312, air guide pipe; 313, first connecting part; 314, second connecting part DETAILED DESCRIPTION

[0036] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present 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 the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0039] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is 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 of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

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

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] At present, from the development of market situation, the application of rechargeable battery is more and more widely. Rechargeable battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in various electronic equipment, such as electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of rechargeable battery, the market demand is also increasing.

[0045] In the process of battery production and manufacturing, the magnetic foreign matter in the battery slurry can cause the battery self-discharge to increase or even short circuit, thereby affecting the safety of the battery. Therefore, after the positive and negative electrode materials and the conductive agent, the binder, the solvent and other materials form the battery slurry, the battery slurry needs to be de-magnetized to remove the magnetic foreign matter, and then the battery slurry is coated on the surface of the positive and negative electrode foils to form the electrode.

[0046] In the related art, permanent magnet de-magnetizing device or electromagnetic de-magnetizing device is usually used to de-magnetize the battery slurry. In order to ensure the cleaning effect of impurities, the adsorbed magnetic impurities need to be cleaned regularly. At present, metal scraping ring structure is usually used to clean the magnetic impurities adsorbed on the magnetic foreign matter adsorption assembly in the de-magnetizing device. This operation will produce metal particle pollution and will cause damage to the magnetic ring and the magnetic rod, thereby affecting the de-magnetizing effect of the de-magnetizing device.

[0047] Therefore, the embodiment of the present application discloses a slurry de-magnetizing device. The elastic cleaning piece is attached to at least the surface of the magnetic foreign matter adsorption assembly, and moves along the surface of the magnetic foreign matter adsorption assembly under the driving of external force. The automatic cleaning of the magnetic foreign matter adsorption assembly can be realized, the abrasion of the magnetic foreign matter adsorption assembly can be reduced, the probability of metal particles generated by mutual abrasion between the elastic cleaning piece and the magnetic foreign matter adsorption assembly can be reduced, and the effect and efficiency of the slurry de-magnetizing device in adsorbing magnetic foreign matter are improved.

[0048] The slurry de-magnetizing device disclosed by the embodiment of the present application can be used in the production process of the battery device.

[0049] The embodiment of the present application provides a slurry de-magnetizing device. Figure 1 The structure diagram of the slurry de-magnetizing device of some embodiments of the present application is shown in Figure 2 The exploded structure diagram of the slurry de-magnetizing device of some embodiments of the present application is shown in Figure 3 The structure diagram of the elastic cleaning piece of some embodiments of the present application is shown in Figure 4 The structure diagram of the magnetic foreign matter adsorption assembly of some embodiments of the present application is shown in Figure 1 , Figure 5 The structure diagram of the magnetic foreign matter adsorption assembly of some embodiments of the present application is shown in Figure 2 ,Figure 6 Structure diagram of a cleaning assembly for some embodiments of the present application, Figure 7 Structure diagram of a magnetic ring holder for some embodiments of the present application. Reference is made to Figures 1 to 7 The slurry magnetic removal device 1000 includes a tube assembly 100, a magnetic foreign matter adsorption assembly 200, and a cleaning assembly 300. The tube assembly 100 is provided with a containing cavity 110 for containing slurry. The magnetic foreign matter adsorption assembly 200 is arranged in the containing cavity 110 and is used for adsorbing magnetic foreign matters in the slurry. The cleaning assembly 300 is arranged in the containing cavity 110 and includes an elastic cleaning member 310 which is at least partially attached to the surface of the magnetic foreign matter adsorption assembly 200. The elastic cleaning member 310 is configured to move along the surface of the magnetic foreign matter adsorption assembly 200 under the drive of an external force.

[0050] The tube assembly 100 is the main structure of the slurry magnetic removal device 1000. The slurry can flow into the tube assembly 100 and flow along the axial direction X of the tube assembly 100, so that the slurry can flow through the magnetic foreign matter adsorption assembly 200 along a preset path. The tube assembly 100 also provides a fixed support for the magnetic foreign matter adsorption assembly 200, ensuring that the magnetic foreign matter adsorption assembly 200 can remain stable under the impact of the slurry.

[0051] The magnetic foreign matter adsorption assembly 200 is arranged in the containing cavity 110 of the tube assembly 100. The magnetic foreign matter adsorption assembly 200 can include a magnetic rod 211 and a plurality of magnetic rings 212. The magnetic rod 211 and the magnetic rings 212 can generate a magnetic field inside the containing cavity 110 of the tube assembly 100 and use the magnetic field to adsorb magnetic foreign matters in the slurry inside the tube assembly 100.

[0052] The cleaning assembly 300 is arranged in the containing cavity 110 of the tube assembly 100. The cleaning assembly 300 includes an elastic cleaning member 310 which is at least partially attached to the surface of the magnetic foreign matter adsorption assembly 200. Under the drive of an external force (such as manual or electric drive), the elastic cleaning member 310 moves along the surface of the magnetic foreign matter adsorption assembly 200, which can clean the magnetic foreign matters adsorbed on the surface of the magnetic foreign matter adsorption assembly 200.

[0053] The elastic cleaning member 310 can be made of a material with elastic deformation, such as elastic cotton or air bag. Different materials can be selected according to the characteristics of the slurry (such as acidity, alkalinity, and high viscosity) and the cleaning strength requirements, to ensure the cleanliness of the foreign matters on the surface of the magnetic foreign matter adsorption assembly 200.

[0054] The slurry to be treated (such as battery pole piece slurry, coating slurry, etc.) is pumped or flowed into the containing cavity 110 of the pipe body assembly 100; the slurry flows along the preset path in the containing cavity 110, passes through the magnetic foreign matter adsorption assembly 200, and the magnetic foreign matter in the slurry is adsorbed to the surface of the magnetic foreign matter adsorption assembly 200 under the attraction of the magnetic field of the magnetic foreign matter adsorption assembly 200, realizing the separation of the magnetic foreign matter from the slurry, and the clean slurry after removing the magnetic foreign matter flows out from the outlet of the pipe body assembly 100, completing the magnetic foreign matter adsorption process of the slurry. After the magnetic foreign matter adsorption assembly 200 completes one or more times of the magnetic foreign matter adsorption process of the slurry, a large amount of magnetic foreign matter is adsorbed to the surface of the magnetic foreign matter adsorption assembly 200. At this time, the elastic cleaning piece 310 can move along the surface of the magnetic foreign matter adsorption assembly 200 under the driving of an external force. Since the elastic cleaning piece 310 is at least surface-fitted with the magnetic foreign matter adsorption assembly 200, the magnetic foreign matter adsorbed by the magnetic foreign matter adsorption assembly 200 and the slurry can be cleaned during the movement of the elastic cleaning piece 310. After the elastic cleaning piece 310 moves back and forth for one or more times, the cleaning of the magnetic foreign matter adsorption assembly 200 is completed.

[0055] By at least surface-fitting the elastic cleaning piece 310 with the magnetic foreign matter adsorption assembly 200 and moving along the surface of the magnetic foreign matter adsorption assembly 200 under the driving of an external force, the automatic cleaning of the magnetic foreign matter adsorption assembly 200 can be realized, the wear of the magnetic foreign matter adsorption assembly 200 can be reduced, and the probability of generating metal particles due to the mutual wear between the elastic cleaning piece 310 and the magnetic foreign matter adsorption assembly 200 can be reduced, thereby improving the effect and efficiency of the magnetic foreign matter adsorption of the slurry magnetic removal device 1000.

[0056] According to some embodiments of the present application, the magnetic foreign matter adsorption assembly 200 includes a plurality of magnetic adsorption members 210, the plurality of magnetic adsorption members 210 are arranged in a nested and spaced manner along the same central axis, and a gap 220 is formed between any two adjacent magnetic adsorption members 210; the elastic cleaning piece 310 is located in the gap 220 and at least partially surface-fitted with the two adjacent magnetic adsorption members 210.

[0057] The gap 220 is formed between any two adjacent magnetic adsorption members 210, the gap 220 provides a flow channel for the slurry, avoids that the magnetic adsorption members 210 completely block the containing cavity 110, ensures the normal flow of the slurry, makes the slurry form turbulent flow or slow flow in the gap 220, prolongs the contact time of the slurry with the surface of the magnetic adsorption members 210, and allows the magnetic foreign matter to be adsorbed to the surface of the magnetic adsorption members 210 under the action of the magnetic field.

[0058] In one embodiment, the magnetic attraction accessory 210 can include a magnetic ring 212. In another embodiment, the magnetic attraction accessory 210 can include a magnetic bar 211 and a plurality of magnetic rings 212, the magnetic bar 211 being located in the center hole of the innermost magnetic ring 212.

[0059] The elastic cleaning piece 310 is located in the gap 220 and is in surface contact with the two adjacent magnetic attraction accessories 210, ensuring that the elastic cleaning piece 310 can scrape or peel off foreign matter adsorbed on the surface of the magnetic attraction accessory 210 when moving along the surface of the magnetic attraction accessory 210 under external force. At the same time, the same elastic cleaning piece 310 can simultaneously contact the surfaces of two magnetic attraction accessories 210, reducing the number of elastic cleaning pieces 310 and simplifying the structure of the cleaning assembly 300.

[0060] Through the nested and spaced arrangement of the plurality of magnetic attraction accessories 210 and the cooperation with the elastic cleaning piece 310 in the gap 220, the adsorption efficiency of the magnetic foreign matter adsorption assembly 200 is improved, and the precise cleaning of foreign matter in the gap 220 is realized.

[0061] According to some embodiments of the present application, the elastic cleaning piece 310 includes a plurality of annular parts 311 arranged in a coaxial nested manner, and the plurality of annular parts 311 are coaxially and alternately arranged with the plurality of magnetic attraction accessories 210.

[0062] Each annular part 311 can be an independent annular unit, and the coaxial nested arrangement of the annular parts 311 can enable the annular parts 311 to fit the outer or inner peripheral surface of the magnetic attraction accessory 210.

[0063] The plurality of annular parts 311 are coaxially and alternately arranged with the plurality of magnetic attraction accessories 210, and along the radial direction Y of the central axis, they present an alternating arrangement of “magnetic attraction accessory 210→annular part 311→magnetic attraction accessory 210→annular part 311”, i.e., each annular part 311 is just embedded in the gap 220 between the two adjacent magnetic attraction accessories 210, so that a single annular part 311 can clean the surfaces (inner and outer sides) of the two adjacent magnetic attraction accessories 210 on both sides at the same time, without the need to configure a cleaning piece for each magnetic attraction accessory 210, which greatly simplifies the structure of the cleaning assembly 300 and avoids cleaning dead angles.

[0064] The alternating nesting of the annular part 311 and the magnetic attraction accessory 210 ensures that each gap 220 has a corresponding cleaning unit, and the movement path of the cleaning piece completely covers the surface of the magnetic attraction accessory 210; the coaxial design makes the overall radial Y dimension smaller and more compact, which is suitable for installation in the limited space in the accommodating cavity 110 of the pipe assembly 100 without affecting the flow path of the slurry; the plurality of annular parts 311 can be integrated on the same driving structure to realize synchronous movement, ensuring that all gaps 220 and the surfaces of the magnetic attraction accessories 210 are cleaned at the same time, and improving the maintenance efficiency.

[0065] By the design of the coaxial and alternate arrangement of the plurality of annular portions 311 and the magnetic suction members 210, the precise matching of the cleaning structure and the suction structure is achieved, and the overall cleaning efficiency and structural compactness are significantly improved.

[0066] According to some embodiments of the present application, the magnetic suction member 210 includes a non-magnetic portion 214 and a magnetic portion 215 arranged along a central axis, and a first gap 221 is formed between the non-magnetic portions 214 of two adjacent magnetic suction members 210 along a radial direction Y of the central axis, and a second gap 222 is formed between the magnetic portions 215 of the two adjacent magnetic suction members 210; the first gap 221 is larger than the corresponding second gap 222; and the elastic cleaning member 310 is configured to move between the first gap 221 and the second gap 222 under an external force.

[0067] The magnetic portion 215 is responsible for generating a magnetic field to attract foreign matter, and the non-magnetic portion 214 mainly serves as a support, a connection or a spacing, and has no magnetism, so as to avoid mutual interference of the magnetic fields between the adjacent magnetic portions 215. The non-magnetic portion 214 can be made of non-magnetic metal, ceramic or plastic.

[0068] In the cleaning state, the elastic cleaning member 310 is driven by an external force to enter the second gap 222 from the first gap 221. Since the second gap 222 is smaller in size, the elastic cleaning member 310 is squeezed and deformed to tightly adhere to the surfaces of the two magnetic portions 215, and can completely scrape off the foreign matter on the surfaces of the magnetic portions 215 and in the second gap 222 during movement. After cleaning, the elastic cleaning member 310 returns to the first gap 221. Since the first gap 221 is larger in size, the cleaning member returns to the natural state and does not tightly squeeze the surface of the non-magnetic portion 214, so that it can easily move back to the original position, and can also reduce the wear caused by long-term adhesion to the magnetic portion 215, thereby prolonging the service life.

[0069] By utilizing the size difference between the first gap 221 and the second gap 222, the elastic cleaning member 310 can move between the two gaps 220, which not only ensures that the elastic cleaning member 310 tightly adheres to the magnetic portion 215 to remove foreign matter during cleaning, but also enables the elastic cleaning member 310 to smoothly reset or move through the first gap 221 in the non-cleaning state.

[0070] According to some embodiments of the present application, the annular portion 311 includes an air bag, and the air bag includes a first state after inflation, and the air bag is configured to be in the first state when moving between the first gap 221 and the second gap 222.

[0071] The air bag forms a first state with certain rigidity and elasticity after inflation, and the outer diameter size can be accurately controlled at this time. When entering the second gap 222, the outer diameter of the inflated air bag is slightly larger than the size of the second gap 222, and is tightly attached to the surface of the two magnetic parts 215 through elastic deformation, ensuring the thoroughness of removing foreign matter. When moving in the first gap 221, the inflated state can keep the air bag stable in shape, avoiding the air bag from collapsing or deviating due to the large gap 220, ensuring smooth movement without jamming.

[0072] Compared with the traditional solid elastic member, the inflated state of the air bag can be adjusted by adjusting the air pressure to fine-tune the outer diameter, which can adapt to the error of different gap 220 sizes, and has stronger universality.

[0073] By setting the annular part 311 as an inflatable air bag and using its first state after inflation to adapt to different sizes of the gap 220, the flexibility and thoroughness of cleaning are further improved.

[0074] According to some embodiments of the present application, the air bag also includes a second state after air extraction, and the air bag is located in the first gap 221 in the second state.

[0075] The air bag is reduced in volume after air extraction and is in the second state, at which time it can be completely accommodated in the first gap 221. The reduced air bag does not protrude or occupy the pulp flow space, avoiding additional resistance to the flow of pulp, and also preventing the air bag from being damaged by the pulp when not in operation. After air extraction, the air bag has a small contact area with the surface of the non-magnetic part 214, and the starting resistance is smaller when moving or inflating again, and the operation is more flexible.

[0076] The air bag after air extraction has small volume and low tension, which can reduce friction and collision with other components when not in operation, prolong the service life of the air bag, and avoid fatigue and aging of the air bag due to long-term inflation.

[0077] Through the double-state switching of the first state after inflation and the second state after air extraction of the air bag, the space utilization and operation convenience of the cleaning assembly 300 are further improved.

[0078] According to some embodiments of the present application, the cleaning assembly 300 further includes a gas guide pipe 312 for guiding gas into or out of the air bag.

[0079] By guiding the external compressed gas into the air bag through the gas guide pipe 312, the air bag is inflated from the second state after air extraction to the first state after inflation, meeting the shape and rigidity required for cleaning. By guiding the gas in the air bag out through the gas guide pipe 312 (connecting a vacuum pump or a manual air extraction device), the air bag is contracted from the first state to the second state, realizing the accommodation of the air bag in the non-cleaning state.

[0080] The gas guide pipe 312 needs to ensure air tightness to avoid gas leakage and cause the air bag to be unstable.

[0081] The outer end of the gas guide pipe 312 can be directly connected to a general gas source (such as an air compressor) or a gas extraction device (such as a vacuum pump), and the state of the air bag can be controlled without disassembling the device, and the operation process is simple.

[0082] The gas guide pipe 312 provides a controllable gas transmission channel for the inflation and deflation of the air bag, and improves the convenience and reliability of switching between the first state and the second state of the air bag.

[0083] According to some embodiments of the present application, the cleaning assembly 300 further comprises a first connecting piece 313 connected with the gas guide pipe 312 and extending in a direction parallel to the central axis.

[0084] The first connecting piece 313 is connected with the gas guide pipe 312 and extends in parallel to the central axis, and the first connecting piece 313 can constrain the running direction of the gas guide pipe 312, so that the gas guide pipe 312 always remains parallel to the axis when the air bag moves along the central axis, and will not be wound on the magnetic attraction member 210 or interfere with the slurry flow due to the movement of the air bag.

[0085] When the air bag is driven to move between the first and second gaps 222 by an external force, the first connecting piece 313 can provide stable force support for the gas guide pipe 312, avoiding the gas guide pipe 312 from being loosened or leaking due to pulling. If the first connecting piece 313 is linked with a driving mechanism (such as a push rod), the regular linear motion of the first connecting piece 313 can also drive the air bag and the gas guide pipe 312 to move synchronously, improving the positional accuracy of the air bag movement and avoiding incomplete cleaning due to deviation.

[0086] The first connecting piece 313 can also serve as an integrated carrier of the gas guide pipe 312, fixing multiple gas guide pipes 312 together to reduce the process of fixing the gas guide pipes 312 separately and reduce the assembly complexity.

[0087] By arranging the first connecting piece 313 extending in parallel to the central axis and connecting the first connecting piece 313 with the gas guide pipe 312, the gas guide pipe 312 can move stably along a direction parallel to the central axis when the air bag moves.

[0088] According to some embodiments of the present application, the cleaning assembly 300 further comprises a second connecting piece 314 connected with the annular portion 311, and the projections of the first connecting piece 313 and the second connecting piece 314 on a plane perpendicular to the central axis are spaced apart along the circumference of the central axis.

[0089] The second connecting piece 314 is connected with the annular part 311, and can not only limit the structure of the annular part 311, but also drive the annular part 311 to move along the central axis. The second connecting piece 314 can be arranged at intervals along the circumference of the annular part 311, so as to reduce the probability of deviation or deformation of the annular part 311 due to uneven force.

[0090] The second connecting piece 314 and the first connecting piece 313 are arranged at intervals along the circumference of the central axis in the projection plane perpendicular to the central axis, and do not overlap in the radial Y space, which not only reduces the probability that the space occupied by the connecting piece is too large to affect the flow of the slurry, but also avoids mutual shielding or pulling of the second connecting piece 314 and the first connecting piece 313, and ensures that the second connecting piece 314 and the first connecting piece 313 can move independently and smoothly.

[0091] By additionally arranging the second connecting piece 314 and limiting the interval arrangement of the second connecting piece 314 and the first connecting piece 313, the first connecting piece 313 and the second connecting piece 314 respectively realize the functional division of supporting the air guide pipe 312 and connecting and driving the annular part 311, and meanwhile, the utilization rate of the radial Y space of the device and the force balance are optimized.

[0092] According to some embodiments of the present application, referring to Figure 4 The plurality of magnetic attraction members 210 include a magnetic rod 211 and a plurality of magnetic rings 212, and the magnetic rod 211 is located in the center hole of the innermost magnetic ring 212.

[0093] The magnetic rod 211 is located in the center hole of the innermost magnetic ring 212, and the arrangement of the magnetic rod 211 can enhance the magnetic field in the central region. The magnetic pole direction of the magnetic ring 212 and the magnetic rod 211 is arranged along the axial direction X of the central axis, so as to meet the requirements of the demagnetization operation. The number of the magnetic ring 212 can be arranged according to the specific requirements of the demagnetization operation and the diameter of the inner cavity of the pipe body assembly 100.

[0094] The magnetic ring 212 and the magnetic rod 211 can be made of high magnetic permeability materials such as neodymium iron boron, ferrite, etc., and the magnetic field strength of the magnetic ring 212 and the magnetic rod 211 can be adjusted according to the particle size and magnetic strength of the magnetic foreign matter in the slurry, so as to ensure the adsorption force of the magnetic foreign matter.

[0095] By coaxially nesting the magnetic rod 211 and the plurality of magnetic rings 212, a three-dimensional magnetic field distribution is formed from the center to the outer periphery of the magnetic foreign matter adsorption assembly 200, which greatly improves the capture range and adsorption efficiency of the magnetic foreign matter in the slurry.

[0096] According to some embodiments of the present application, the magnetic ring 212 includes a plurality of magnetic ring petals 2121 along the circumference thereof; and each two adjacent magnetic ring petals 2121 have a first gap part 213 for accommodating the air guide pipe 312.

[0097] The complete magnetic ring 212 is usually difficult to install and disassemble when the space inside the pipe body assembly 100 is narrow due to its large size. In order to reduce the difficulty of installation and disassembly of the magnetic ring 212, the magnetic ring 212 can be split, and the magnetic ring 212 is split into a plurality of magnetic ring petals 2121 along the circumference thereof. The number of magnetic ring petals 2121 can be 2 or more. The arc of each magnetic ring petal 2121 can be consistent. During installation, the single magnetic ring petals 2121 can be placed into the installation window of the pipe body assembly 100 one by one, and then spliced into a complete magnetic ring 212 at the specified position.

[0098] Any two adjacent magnetic ring petals 2121 have a first gap portion 213, and the air guide pipe 312 can be directly embedded in the first gap portion 213. No additional holes need to be punched in the magnetic ring 212 or the overall structure of the magnetic ring 212 needs to be changed. This avoids damaging the magnetic field distribution of the magnetic ring 212. The first gap portion 213 can form a circumferential limit for the air guide pipe 312 to prevent the air guide pipe 312 from deviating during slurry flow or air bag movement, thereby ensuring stable gas transmission.

[0099] By splitting the magnetic ring 212 into a plurality of magnetic ring petals 2121 and providing a first gap portion 213 between any two adjacent magnetic ring petals 2121, the problem of arranging the air guide pipe 312 in the magnetic ring 212 area is ingeniously solved. This not only ensures the integrity of the magnetic field of the magnetic ring 212, but also provides a dedicated accommodation space for the air guide pipe 312, thereby reducing the probability of interference between the air guide pipe 312 and the magnetic ring 212 and the air bag.

[0100] According to some embodiments of the present application, the pipe body assembly 100 includes a magnetic ring support 120. The magnetic ring support 120 is located in the first gap portion 213 and abuts against the end surface of the magnetic ring petal 2121 adjacent to the first gap portion 213. The magnetic ring support 120 includes a second gap portion 121 for accommodating the air guide pipe 312.

[0101] The magnetic ring support 120 is a fixed structure inside the pipe body assembly 100 and can be annular, disc-shaped, or rectangular, etc. The material can be non-magnetic metal or high-strength plastic, and is fixedly connected with the inner wall of the pipe body assembly 100. When the multi-petal magnetic ring 212 is spliced through the first gap portion 213, displacement can easily occur due to the gap 220 or stress. The magnetic ring support 120 abuts against the end surface of the magnetic ring petal 2121, which can limit the circumferential and radial Y movement of each magnetic ring petal 2121, thereby ensuring the stability of the overall shape of the spliced magnetic ring 212 and avoiding mispositioning of the magnetic ring petals 2121 due to slurry scouring.

[0102] The air guide pipe 312 is located in the second gap portion 121 of the magnetic ring support 120. The magnetic ring support 120 can limit the air guide pipe 312 to prevent it from shaking during device operation, thereby ensuring the air tightness and stability of gas transmission of the air guide pipe 312.

[0103] By additionally adding the magnetic ring support 120 and designing the second notch part 121 on the magnetic ring support 120, the fixing problem of the multi-petal magnetic ring 212 is solved, and the smooth arrangement of the air guide pipe 312 is continued, forming a dual function of positioning the magnetic ring petal 2121 and accommodating the air guide pipe 312, further improving the stability and compactness of the device structure.

[0104] According to some embodiments of the present application, the pipe body assembly 100 further comprises a support pipe 130, an inlet structure 140 and an outlet structure 150. The inlet structure 140 is connected to one end of the support pipe 130 in the axial direction X, and the inlet structure 140 is provided with an inlet opening. The outlet structure 150 is connected to the other end of the support pipe 130 in the axial direction X, and the outlet structure 150 is provided with an outlet opening. The magnetic foreign matter adsorption assembly 200 and the elastic cleaning element 310 are arranged in the support pipe 130, and the magnetic ring support 120 is connected with the support pipe 130 and the inlet structure 140.

[0105] The support pipe 130 is the main structure of the pipe body assembly 100, which can adopt a cylindrical pipe structure, and the battery slurry can pass into the support pipe 130. The support pipe 130 can be made of non-ferromagnetic material, such as aluminum, aluminum alloy, copper, to prevent interference with the magnetic field formed by the magnetic foreign matter adsorption assembly 200, affecting the magnetic field distribution and the magnetic field strength.

[0106] The inlet structure 140 is connected to one end of the support pipe 130 in the axial direction X, and the outlet structure 150 is connected to the other end of the support pipe 130 in the axial direction X, so that the end of the support pipe 130 connected to the inlet structure 140 forms an inlet end, the end of the support pipe 130 connected to the outlet structure 150 forms an outlet end, the inlet structure 140 blocks the inlet end of the support pipe 130, and the inlet structure 140 is provided with an inlet opening, and the outlet structure 150 blocks the outlet end of the support pipe 130, and the outlet structure 150 is provided with an outlet opening.

[0107] The connection mode between the inlet structure 140, the outlet structure 150 and the support pipe 130 includes but is not limited to threaded connection, lock catch connection, ring connection or bolt connection.

[0108] Through the system design of the support pipe 130 bearing, the inlet structure 140 and the outlet structure 150 guiding, the magnetic foreign matter adsorption assembly 200 adsorbing magnetic foreign matter, the magnetic ring support 120 positioning and the elastic cleaning element 310 cleaning the magnetic foreign matter adsorption assembly 200, the balance of performance, stability and maintainability is realized, and the device can better adapt to the efficiency demand of industrial mass production on the basis of high precision and high stability.

[0109] According to some embodiments of the present application, with reference to Figure 2The feeding structure 140 includes a head 141 and a top plate 142, the head 141 is detachably mounted at the upper end of the top plate 142, the top plate 142 is connected with the magnetic ring support 120, and the first connecting piece 313 and the second connecting piece 314 penetrate the head 141.

[0110] After the slurry enters the feeding port, the slurry flows along the inner wall of the head 141 in the flow guide cavity of the head 141, the flow direction of the slurry can be changed and the flow rate of the slurry can be slowed down, the probability of the slurry directly impacting the magnetic foreign matter adsorption assembly 200 is reduced, and the slurry is stably flowed.

[0111] The lower end surface of the top plate 142 is connected with the axial X end surface of the magnetic ring support 120, the probability of the axial X displacement of the magnetic ring support 120 under the impact of the slurry can be reduced; meanwhile, the radial Y dimension of the top plate 142 can be matched with the support pipe 130, the radial Y shaking of the magnetic ring support 120 can be further limited after installation, and the coaxiality of the magnetic ring petals 2121 and the magnetic rod 211 is ensured.

[0112] The upper end surface of the top plate 142 is mounted with the head 141, and the lower end surface is connected with the axial X end of the support pipe 130, and finally a complete structure closed loop of the head 141→the top plate 142→the support pipe 130→the discharging structure 150 is formed, the sealing property and the structural strength of the whole device are ensured, and the conveying pressure of the high-pressure slurry can be borne, wherein the first head 141 and the top plate 142 can be connected and fixed by means of screws, buckles or the like.

[0113] The first connecting piece 313 and the second connecting piece 314 penetrate the head 141, the first connecting piece 313 and the second connecting piece 314 can be connected with an external driving assembly, the driving assembly can drive the first connecting piece 313 and the second connecting piece 314 to move in the direction parallel to the central axis, so that the elastic cleaning piece 310 can be driven to move along the surface of the magnetic ring 212 and the magnetic rod 211.

[0114] By splitting the feeding structure 140 into the head 141 and the top plate 142, the head 141 is used for buffering and flow guiding, and the top plate 142 is used for positioning and supporting, the flow field stability of the feeding end and the positioning accuracy of the magnetic foreign matter adsorption unit are improved, the maintenance convenience is greatly improved, and the slurry magnetic removal device 1000 has higher practicality and reliability in industrial applications.

[0115] The application also provides a battery production system.

[0116] The battery production system in the application can effectively remove the magnetic foreign matter in the battery slurry after the magnetic foreign matter adsorption operation, thereby effectively improving the performance of the battery.

[0117] It should be noted that according to actual production needs, the battery production system can further include a feeding pipeline, a discharging pipeline, a driving mechanism, etc. A three-way valve, a recovery system pipeline and a buffer tank pipeline can be further arranged at the rear end of the discharging pipeline. The discharging pipeline can switch the recovery system pipeline or the buffer tank pipeline through the three-way valve. When the slurry is subjected to a magnetic removal operation, the discharging pipeline is switched to the recovery system pipeline; and when the magnetic removal operation is completed, the discharging pipeline is switched to the buffer tank pipeline.

[0118] In addition, the battery production system in the embodiment also has all the beneficial effects of the slurry magnetic removal device, which will not be described here.

[0119] The technical solutions of the present application will be further described below through a specific embodiment, as shown in Figures 1 to 7

[0120] The slurry magnetic removal device 1000 includes a pipe body assembly 100, a magnetic foreign matter adsorption assembly 200 and a cleaning assembly 300.

[0121] The pipe body assembly 100 includes a containing cavity 110, a magnetic ring support 120, a support pipe 130, an inlet structure 140 and an outlet structure 150. The containing cavity 110 is used to contain the slurry. The magnetic ring support 120 is located at the first notch portion 213 and abuts against the end face of the magnetic ring lobe 2121 adjacent to the first notch portion 213; the magnetic ring support 120 includes a second notch portion 121 for containing the air guide pipe 312. The inlet structure 140 is connected to one end of the support pipe 130 in the axial direction X, and the inlet structure 140 is provided with an inlet opening; the inlet structure 140 includes a head 141 and a top plate 142, the head 141 is detachably installed at the upper end of the top plate 142, the top plate 142 is connected with the magnetic ring support 120, and the first connecting member 313 and the second connecting member 314 penetrate through the head 141. The outlet structure 150 is connected to the other end of the support pipe 130 in the axial direction X, and the outlet structure 150 is provided with an outlet opening; wherein the magnetic foreign matter adsorption assembly 200 and the elastic cleaning member 310 are arranged in the support pipe 130, and the magnetic ring support 120 is connected with the support pipe 130 and the inlet structure 140.

[0122] ​The magnetic foreign matter adsorption assembly 200 is arranged in the accommodating cavity 110 and is used for adsorbing the magnetic foreign matter in the slurry; the magnetic foreign matter adsorption assembly 200 comprises a plurality of magnetic adsorption members 210, the plurality of magnetic adsorption members 210 are arranged in a nested and spaced manner along the same central axis, and a gap 220 is formed between any two adjacent magnetic adsorption members 210; the magnetic adsorption member 210 comprises a non-magnetic part 214 and a magnetic part 215 arranged along the central axis, and a first gap 221 is formed between the non-magnetic parts 214 of the two adjacent magnetic adsorption members 210 along a radial direction Y of the central axis, and a second gap 222 is formed between the magnetic parts 215 of the two adjacent magnetic adsorption members 210; the first gap 221 is larger than the corresponding second gap 222.

[0123] The plurality of magnetic adsorption members 210 comprise a magnetic rod 211 and a plurality of magnetic rings 212, and the magnetic rod 211 is located in the central hole of the innermost magnetic ring 212; the magnetic ring 212 comprises a plurality of magnetic ring petals 2121 along the circumferential direction thereof; and any two adjacent magnetic ring petals 2121 have a first notch part 213 for accommodating the air guide pipe 312.

[0124] The cleaning assembly 300 is arranged in the accommodating cavity 110, and the cleaning assembly 300 comprises an elastic cleaning member 310 located in the gap 220 and at least partially attached to the surfaces of the two adjacent magnetic adsorption members 210. The elastic cleaning member 310 comprises a plurality of annular parts 311 arranged in a coaxial and nested manner, and the plurality of annular parts 311 are coaxially and alternately arranged with the plurality of magnetic adsorption members 210.

[0125] The annular part 311 comprises an air bag, the air bag comprises a first state after inflation and a second state after deflation, and the air bag is configured to be in the first state when moving between the first gap 221 and the second gap 222, and the air bag is in the second state in the first gap 221. The cleaning assembly 300 further comprises an air guide pipe 312 for guiding gas into or out of the air bag, a first connecting member 313 and a second connecting member 314, the second connecting member 314 is arranged in a spaced manner along the circumferential direction of the central axis in the projection of the first connecting member 313 in the plane perpendicular to the central axis, the first connecting member 313 is connected with the air guide pipe 312 and extends in a direction parallel to the central axis, and the second connecting member 314 is connected with the air bag.

[0126] The battery production system comprises the above-mentioned slurry demagnetization device 1000, a feeding pipeline, a discharging pipeline and a driving mechanism. The discharging pipeline is provided with a three-way valve, a recovery system pipeline and a buffer tank pipeline.

[0127] The battery production system has a purification working condition and a cleaning working condition.

[0128] Under the cleaning condition, the incoming three-way valve is switched to the recovery system pipeline, the air bag is inflated to the first state, and the elastic cleaning element 310 is driven by external force to move along the surface of the magnetic foreign matter adsorption assembly 200, cleaning the magnetic foreign matter adsorbed by the magnetic foreign matter adsorption assembly 200 and the slurry. After one or more reciprocating movements of the elastic cleaning element 310, the cleaning of the magnetic foreign matter adsorption assembly 200 is completed.

[0129] Under the cleaning condition, the incoming three-way valve is switched to the recovery system pipeline, the air bag is inflated to the first state, and the elastic cleaning element 310 is driven by external force to move along the surface of the magnetic foreign matter adsorption assembly 200, cleaning the magnetic foreign matter adsorbed by the magnetic foreign matter adsorption assembly 200 and the slurry. After one or more reciprocating movements of the elastic cleaning element 310, the cleaning of the magnetic foreign matter adsorption assembly 200 is completed.

[0130] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A slurry de-magnetizing device, characterized by, The application relates to a slurry cleaning device. The device comprises: a tube assembly provided with a containing cavity for containing slurry; a magnetic foreign matter adsorption assembly arranged in the containing cavity and used for adsorbing magnetic foreign matters in the slurry; 2. The slurry de-magnetizing device of claim 1, wherein, a cleaning assembly arranged in the containing cavity, the cleaning assembly comprising an elastic cleaning piece which is at least partially attached to the surface of the magnetic foreign matter adsorption assembly; the elastic cleaning piece is configured to move along the surface of the magnetic foreign matter adsorption assembly under the drive of external force. The magnetic foreign matter adsorption assembly comprises a plurality of magnetic adsorption members which are arranged in a nested and spaced manner along a same central axis, and a gap is formed between any two adjacent magnetic adsorption members.

3. The slurry de-magnetizing device of claim 2, wherein, The elastic cleaning piece is located in the gap and at least partially attached to the surface of the two adjacent magnetic adsorption members.

4. The slurry de-magnetizing device of claim 3, wherein, The elastic cleaning piece comprises a plurality of annular parts which are arranged in a coaxial and nested manner, and the plurality of annular parts and the plurality of magnetic adsorption members are coaxially and alternately arranged. The magnetic adsorption member comprises a non-magnetic part and a magnetic part which are arranged along the central axis, and a first gap is formed between the non-magnetic parts of two adjacent magnetic adsorption members along the radial direction of the central axis, and a second gap is formed between the magnetic parts of the two adjacent magnetic adsorption members; the first gap is larger than the corresponding second gap.

5. The slurry de-magnetizing device of claim 4, wherein, The elastic cleaning piece is configured to move between the first gap and the second gap under the drive of external force.

6. The slurry de-magnetizing device of claim 5, wherein, The annular part comprises an air bag which comprises a first state after inflation, and the air bag is configured to be in the first state when moving between the first gap and the second gap.

7. The slurry de-magnetizing device of claim 6, wherein, The air bag further comprises a second state after deflation, and the air bag is located in the first gap in the second state.

8. The slurry de-magnetizing device of claim 7, wherein, The cleaning assembly further comprises an air guide pipe for guiding gas into or out of the air bag.

9. The slurry de-magnetizing device of claim 8, wherein, The cleaning assembly further comprises a first connecting piece which is connected with the air guide pipe and extends in a direction parallel to the central axis.

10. The slurry de-magnetizing device of claim 9, wherein, The cleaning assembly further comprises a second connecting piece which is connected with the annular part, and the projection of the second connecting piece and the first connecting piece on a plane perpendicular to the central axis is arranged in a circumferential direction along the central axis.

11. The slurry de-magnetizing device of claim 10, wherein, The plurality of magnetic adsorption members comprises a magnetic rod and a plurality of magnetic rings, and the magnetic rod is located in the central hole of the innermost magnetic ring.

12. The slurry de-magnetizing device of claim 11, wherein, The magnetic ring comprises a plurality of magnetic ring petals along the circumferential direction thereof; any two adjacent magnetic ring petals have a first notch part for accommodating the air guide pipe. The tube assembly comprises a magnetic ring support which is located in the first notch part and abuts against the end face of the magnetic ring petal adjacent to the first notch part.

13. The slurry de-magnetizing device of claim 12, wherein, The magnetic ring support comprises a second notch part for accommodating the air guide pipe. The tube assembly further comprises: a support tube; a feeding structure connected to one end of the support tube in the axial direction, and a feeding port is formed in the feeding structure; an outlet structure connected to the other end of the support tube in the axial direction, and an outlet port is formed in the outlet structure. The magnetic foreign matter adsorption assembly and the elastic cleaning piece are arranged in the support pipe, and the magnetic ring support is connected with the support pipe and the material inlet structure.

14. The slurry de-magnetizing device of claim 13, wherein, The material inlet structure comprises a head and a top plate, the head is detachably mounted on the upper end of the top plate, the top plate is connected with the magnetic ring support, and the first connecting piece and the second connecting piece penetrate the head.

15. A battery production system characterized by comprising: The method comprises: The slurry demagnetization device according to any one of claims 1 to 14.

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