CN116351565B - Recovery device and battery production system - Google Patents

Recovery device and battery production system Download PDF

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Publication number
CN116351565B
CN116351565B CN202310641441.9A CN202310641441A CN116351565B CN 116351565 B CN116351565 B CN 116351565B CN 202310641441 A CN202310641441 A CN 202310641441A CN 116351565 B CN116351565 B CN 116351565B
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Prior art keywords
filtering
target liquid
container
communicated
filter
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CN202310641441.9A
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CN116351565A (en
Inventor
殷俏
胥飞龙
李后勇
邓真真
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Jiangsu Contemporary Amperex Technology Ltd
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Jiangsu Contemporary Amperex Technology Ltd
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Priority to CN202310641441.9A priority Critical patent/CN116351565B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Coating Apparatus (AREA)

Abstract

The embodiment of the application provides a recovery unit and battery production system, and recovery unit includes feed mechanism, filtering mechanism and storage mechanism. The feeding mechanism is used for receiving target liquid to be filtered; the filtering mechanism is communicated with the feeding mechanism and is used for receiving the target liquid and filtering solid impurities in the target liquid; the storage mechanism is communicated with the filtering mechanism and is used for storing the filtered target liquid. The application can recycle liquid materials in the production process of the battery.

Description

Recovery device and battery production system
Technical Field
The present application relates to the field of battery production processing technology, and more particularly, to a recycling device and a battery production system.
Background
In the battery production process, a plurality of materials are used, and some liquid materials are directly treated after being used, so that the waste is relatively high.
How to recycle liquid materials in the battery production process is one research direction in the battery production field.
Disclosure of Invention
The application provides a recovery unit and battery production system, it can retrieve the liquid material in the battery production process.
The embodiment of the application provides a recovery device, including feed mechanism, filtering mechanism and storage mechanism. The feeding mechanism is used for receiving target liquid to be filtered; the filtering mechanism is communicated with the feeding mechanism and is used for receiving the target liquid and filtering solid impurities in the target liquid; the storage mechanism is communicated with the filtering mechanism and is used for storing the filtered target liquid.
In the above-mentioned technical scheme, the recovery unit of this application embodiment is through setting up feed mechanism, filtering mechanism and storage mechanism, feed mechanism receives the target liquid of waiting to filter, filtering mechanism reducible target liquid in the solid impurity such as magnetic metal particle, storage mechanism stores the target liquid after filtering, in this way, the recovery unit of this application embodiment alright retrieve NMP solution and purify and store it to obtain comparatively pure NMP, use in the magnetic metal particle detection test of feed slurry, save test cost, resources are saved.
In some embodiments, the filtration mechanism includes a first vessel having a first receiving chamber in communication with the feed mechanism and a filtration structure disposed in the first receiving chamber and configured to filter solid impurities in the target liquid.
In the technical scheme, the filtering mechanism comprises the first container and the filtering structure, the target liquid can be filtered in the first container, the mixing of other impurities in the filtering process is reduced, and the purity of the target liquid is improved.
In some embodiments, the filtering structure includes a filtering sidewall surrounding the hollow cavity, the filtering sidewall being configured to filter the target liquid, the filtering mechanism being in communication with the storage mechanism through the hollow cavity.
In the technical scheme, the filtering side wall is surrounded to form the hollow cavity and is communicated with the storage mechanism through the hollow cavity, so that the end part of the surrounding filtering side wall can be fixed on the first container, the filtering structure can be fixed, and the fixing is convenient.
In some embodiments, the filtering structure further comprises a supporting tube body, wherein the tube wall of the supporting tube body is provided with a plurality of through holes, the filtering side wall is arranged on the supporting tube body along the circumferential direction of the supporting tube body, and one end of the supporting tube body is communicated with the storage mechanism.
In the technical scheme, the support pipe body is arranged, when the filtering side wall adopts a material with lower support capacity, the filtering side wall can be supported, and the deformation of the filtering side wall under the impact of target liquid is reduced. And communication between the hollow cavity and the storage mechanism is also facilitated.
In some embodiments, the first container includes a base and a body, the body is connected to the base and encloses with the base to form a first accommodating cavity, and an end of the support tube, which is in communication with the storage mechanism, is disposed on the base.
In the technical scheme, one end of the supporting tube body, which is communicated with the storage mechanism, is arranged on the base, namely, one end of the supporting tube body, which is communicated with the storage mechanism, is positioned below the other end of the supporting tube body, so that the target liquid can flow out under the action of gravity after flowing into the supporting tube body through the filtering side wall, and then enters the storage mechanism, and the circulation of the target liquid is facilitated.
In some embodiments, the base is provided with a first feed port in communication with the feed mechanism, through which the feed mechanism communicates with the first receiving chamber.
In the above technical scheme, the first feeding port is arranged on the base, compared with the arrangement on the body, the length and the height of the connecting pipeline can be reduced, and the circulation of the target liquid is facilitated.
In some embodiments, the filter structure further comprises a blocking member covering the other end of the support tube body and closing at least part of the tube opening of the support tube body.
In the technical scheme, the plugging piece is arranged to seal at least part of the pipe orifice of the support pipe body, so that the volume of target liquid entering the support pipe body without filtering can be reduced, and the filtering effect of the target liquid is improved.
In some embodiments, the filter structure further comprises a filter end wall connected to the filter side wall and covering at least a portion of the mouth of the tube at the other end of the support tube body.
In the technical scheme, the filtering end wall is arranged to seal at least part of the pipe orifice of the supporting pipe body, so that the volume of target liquid entering the supporting pipe body without filtering can be reduced, and the filtering effect of the target liquid is improved. And the filtering surface area of the filtering structure can be increased, and the filtering capability of the filtering structure can be improved.
In some embodiments, the filter mechanism further comprises a pressurizing member in communication with the first receiving chamber and configured to increase the air pressure in the first receiving chamber.
In the technical scheme, the pressurizing piece is arranged to increase the air pressure of the first accommodating cavity, and the air pressure can accelerate the speed of the target liquid entering the hollow cavity, so that the filtering efficiency is improved.
In some embodiments, the filtration mechanism includes a second container having a second receiving chamber in communication with the feed mechanism and a magnetic attraction structure positioned in the second receiving chamber for adsorbing solid impurities of the target liquid, the second receiving chamber being in communication with the storage mechanism.
In the technical scheme, the magnetic attraction structure is arranged, and has a good adsorption effect on the magnetic metal particles in the NMP liquid, so that the magnetic metal particles in the NMP liquid are reduced, the purity of the NMP is improved, and the accuracy of the detection test result of the magnetic metal particles in the follow-up slurry is improved.
In some embodiments, the magnetic attraction structure comprises a plurality of spaced apart magnetic attraction bars.
In the technical scheme, the magnetic suction structure is arranged to comprise a plurality of magnetic suction rods arranged at intervals, the rod-shaped magnetic suction structure is large in length and can be fully contacted with NMP liquid, and the adsorption effect is good.
In some embodiments, the second container includes a base portion and a container portion, the container portion and the base portion enclose to form a second accommodating cavity, the base portion is provided with a second feed inlet communicated with the feed mechanism, the container portion is provided with a discharge outlet communicated with the storage mechanism, and at least part of the magnetic attraction structure is located between the second feed inlet and the discharge outlet.
In the technical scheme, the target liquid entering from the second feed inlet can enter the discharge port from the upper part after contacting with the magnetic structure, so that the contact area of the target liquid and the magnetic structure is increased, and the condition that the target liquid flows out without being filtered by the magnetic structure is reduced.
In some embodiments, when the filter mechanism includes a first container and a filter structure, a second container is in communication between the first container and the storage mechanism.
In the above technical scheme, the second container is arranged between the first container and the storage mechanism, the target liquid can be filtered through the filtering structure in the first container, and then the magnetic metal particles are adsorbed through the magnetic attraction structure, so that the cleaning times of the magnetic attraction structure can be reduced.
In some embodiments, the feed mechanism includes a buffer reservoir in communication with the filtration mechanism.
In the technical scheme, the buffer container is arranged, so that the NMP solution can be stored, and therefore, the NMP can be filtered after accumulating a certain volume, and the loss caused by long-time use of the recovery device is reduced.
In some embodiments, the recovery device further comprises a power mechanism in communication with the feed mechanism and configured to power the flow of the target liquid.
In the technical scheme, the power mechanism is adopted to provide power for the flow of the target liquid, so that the flow speed of the target liquid can be increased, and the recovery efficiency of the target liquid is improved.
In some embodiments, the power mechanism is disposed between the feed mechanism and the filter mechanism.
In the technical scheme, the power mechanism is communicated between the feeding mechanism and the filtering mechanism, so that the efficiency of target liquid entering the filtering mechanism is quickened, and the filtering efficiency is improved.
The embodiment of the application also provides a battery production system, which comprises a feeding device, a coating device, a drying device and a recovery device, wherein the feeding device is used for providing slurry; the coating device is used for coating the sizing agent on the current collector; the drying device is used for drying the slurry on the current collector; the recovery device is used for recovering the target liquid evaporated by the slurry in the drying device.
In some embodiments, the target liquid comprises N-methylpyrrolidone.
In the technical scheme, the N-methyl pyrrolidone is recovered to be used for the magnetic metal particle detection test, so that the cost of the magnetic metal particle detection test is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a battery production system according to some embodiments of the present application;
FIG. 2 is a schematic view of a recycling apparatus according to some embodiments of the present disclosure;
FIG. 3 is a schematic view of another partial structure of a recycling apparatus according to some embodiments of the present application;
FIG. 4 is a schematic view of a filtering mechanism of a recycling apparatus according to some embodiments of the present disclosure;
fig. 5 is another schematic structural view of a filtering mechanism of a recycling device according to some embodiments of the present disclosure.
Reference numerals of the specific embodiments are as follows:
1000. a battery production system;
100. a recovery device; 200. a feeding device; 300. a coating device; 400. a drying device;
1. a feed mechanism; 11. a cache container;
2. a filtering mechanism;
21. a first container; 211. a first accommodation chamber; 212. a base; 2121. a first feed port; 213. a body;
22. a filtering structure; 221. a filter sidewall; 222. a hollow cavity; 223. supporting the tube body; 224. a blocking member;
23. a pressurizing member;
24. a second container; 241. a second accommodation chamber; 242. a seat body part; 2421. a second feed inlet; 243. a container part; 2431. a discharge port; 25. a magnetic attraction structure; 251. a magnetic rod;
3. a storage mechanism;
4. a power mechanism.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.
In the embodiments of the present application, the same reference numerals denote the same components, and in the interest of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.
The term "plurality" as used herein refers to more than two (including two).
The safety performance of the magnetic metal particles on batteries (especially lithium ion batteries) is greatly damaged, after the voltage of the battery in the formation stage reaches the oxidation-reduction potential of the metal particles, the metal particles are oxidized at the positive electrode and then reduced to the negative electrode, when the metal simple substance at the negative electrode is accumulated to a certain extent, the deposited metal hard edges and corners of the metal simple substance can pierce through the diaphragm, and the self-discharge of the battery is caused, so that the magnetic metal particles are required to be detected on the slurry before coating. Among them, N-methylpyrrolidone (NMP) is an essential solvent for detecting magnetic metal particles in slurry, and currently, NMP purchased is mainly used, and the cost is high.
In the batching stage of the slurry, NMP can be used as a solvent of a binder (such as polyvinylidene fluoride) to participate in slurry dispersion, so that a uniform medium is formed, and the stable slurry is maintained for a long time within a certain viscosity range; in the coating stage, NMP is used as a main liquid carrier of the slurry, uniformly coated on a metal substrate with stable thickness, and has very good wettability and fluidity with the metal substrate; in the coating baking stage, the wet film runs at a constant speed in an oven, NMP volatilizes from the wet film at a stable speed and bears the pore-forming function, so that a porous microelectrode structure with uniform pore diameter and uniform distribution is formed.
In the related art, NMP is treated after being condensed through a pipeline in the coating baking stage, and is wasted.
In view of this, this application provides a technical scheme, and it includes recovery mechanism, filtering mechanism and storage mechanism, and recovery mechanism is used for receiving the NMP solution of waiting to filter, and filtering mechanism filters the solid impurity in the NMP solution, and the NMP after the storage mechanism stores the filtration to be used for thick liquids magnetic metal particle detection test, in this way, can realize the recovery recycle of NMP, reduce the cost of thick liquids magnetic metal particle detection test.
The recovery device described in the embodiments of the present application is not only suitable for recovering NMP liquid, but also for recovering other solutions, for example, solutions prepared by chemical reaction, and the like.
The following examples are presented for convenience of explanation, taking NMP recovery as an example.
Fig. 1 is a schematic structural diagram of a battery production system according to some embodiments of the present application.
As shown in fig. 1, the battery production system 1000 includes a feeding device 200, a coating device 300, a drying device 400, and a recovery device 100, the feeding device 200 being for supplying a slurry; the coating device 300 is used for coating a slurry on a current collector; the drying device 400 is used for drying the slurry on the current collector; the recovery device 100 is used for recovering the target liquid evaporated by the slurry in the drying device 400.
The specific structure of the feeding device 200 is not limited in this embodiment, and may include a buffer tank or a buffer box, and may also include an air pump for powering the slurry.
The specific structure of the coating apparatus 300 of the embodiment of the present application is not limited, and may include a coater.
The specific structure of the drying device 400 in the embodiment of the present application is not limited, and may include an oven and a circulation fan, where the circulation fan is connected to the oven and is used for circulating hot air of the oven.
The recovery device 100 is provided to recover the target liquid evaporated from the slurry in the drying device 400, thereby realizing recycling of the target liquid and saving resources.
In some embodiments, the target liquid comprises N-methylpyrrolidone.
And recovering N-methyl pyrrolidone for magnetic metal particle detection test, so as to reduce the cost of the magnetic metal particle detection test.
Fig. 2 is a schematic structural diagram of a recycling apparatus according to some embodiments of the present disclosure.
As shown in fig. 2, the recovery device 100 of the embodiment of the present application includes a feeding mechanism 1, a filtering mechanism 2, and a storage mechanism 3. The feeding mechanism 1 is used for receiving target liquid to be filtered; the filtering mechanism 2 is communicated with the feeding mechanism 1 and is used for receiving the target liquid and filtering solid impurities in the target liquid; the storage means 3 is in communication with the filtering means 2 and is used for storing the filtered target liquid.
The feed mechanism 1 of the present embodiment may include a feed tube for receiving a target liquid.
The filtering mechanism 2 of the present embodiment may include a support frame and a filter screen disposed in the support frame, through which a target liquid can pass, wherein fixed impurities are left in the filter screen. The fixed impurities include, but are not limited to, magnetic metal particles, but may be other impurities such as dust.
The storage mechanism 3 of the embodiment of the present application may be a storage tank or a storage box, or the like.
The filtering mechanism 2 and the feeding mechanism 1 in the embodiment of the application are communicated, and the filtering mechanism and the feeding mechanism can be communicated through a connecting pipeline, can be directly communicated, and can also be communicated through other connecting components. Similarly, the storage mechanism 3 is communicated with the filtering mechanism 2, and the storage mechanism and the filtering mechanism can be communicated by adopting a connecting pipeline, can be directly communicated, and can also be communicated by other connecting components.
According to the recovery device 100, through the arrangement of the feeding mechanism 1, the filtering mechanism 2 and the storage mechanism 3, the feeding mechanism 1 receives target liquid to be filtered, the filtering mechanism 2 can reduce solid impurities such as magnetic metal particles in the target liquid, and the storage mechanism 3 stores the filtered target liquid, so that the recovery device 100 can recover NMP solution and purify and store the NMP solution, and therefore purer NMP is obtained for the magnetic metal particle detection test of slurry, the test cost is saved, and resources are saved.
FIG. 3 is a schematic view of another partial structure of a recycling apparatus according to some embodiments of the present application; fig. 4 is a schematic structural view of a filtering mechanism of a recycling device according to some embodiments of the present disclosure.
Referring to fig. 3 and 4, in some embodiments, the filtering mechanism 2 includes a first container 21 and a filtering structure 22, the first container 21 has a first accommodating cavity 211 in communication with the feeding mechanism 1, and the filtering structure 22 is disposed in the first accommodating cavity 211 and is used for filtering solid impurities in the target liquid.
Illustratively, the filter structure 22 of the present embodiment may be plate-shaped or block-shaped, and the filter structure 22 may be disposed at an angle with respect to the sidewall of the first container 21, and the target liquid flows from above the filter structure 22 through the filter structure 22 and then flows below. Further, the filter structure 22 is disposed perpendicular to the side walls. Of course, the filtering structure 22 may be laid on the bottom wall of the first container 21, and a liquid outlet communicated with the storage mechanism 3 may be formed in the bottom wall of the first container 21.
The material of the filter structure 22 of the present embodiments may be at least one of polyvinyl fluoride, polytetrafluoroethylene, or stainless steel screen. The filter structure 22 of embodiments of the present application may be a multi-layer structure.
The size of the pores of the filter structure 22 in embodiments of the present application may be configured according to the size of the solid impurities that are desired to be removed. For example, the magnetic metal particles are removed, and the size of the holes is smaller than that of the magnetic metal particles. Optionally, the pore size of the filter structure 22 is less than or equal to 0.1um.
The filtering mechanism 2 is provided with the first container 21 and the filtering structure 22, so that the target liquid can be filtered in the first container 21, the mixing of other impurities in the filtering process is reduced, and the purity of the target liquid is improved.
In some embodiments, the filtering structure 22 includes a filtering sidewall 221 surrounding a hollow cavity 222, the filtering sidewall 221 being used to filter the target liquid, and the filtering mechanism 2 being in communication with the storage mechanism 3 through the hollow cavity 222.
The filtering sidewall 221 in this embodiment surrounds the hollow cavity 222, and does not represent the hollow cylindrical structure formed by surrounding the filtering sidewall 221, but may also form a hollow cuboid or other irregularly shaped structures.
The material of the filtering sidewall 221 of the present embodiment may be at least one of polyvinyl fluoride, polytetrafluoroethylene, or stainless steel screen. The filter sidewall 221 of the embodiments of the present application may be a multi-layer structure.
After the hollow cavity 222 is formed around the filtering sidewall 221 in this embodiment, the hollow cavity 222 may be formed with two openings opposite to each other, wherein one opening may be used to communicate with the storage mechanism 3, and the other opening may be closed or may not be treated.
In use, the filter structure 22 of the present embodiment is configured such that the target liquid first enters the first accommodating chamber 211, then passes through the filter sidewall 221 and enters the hollow chamber 222, and flows out of the first container 21 from the hollow chamber 222 and enters the storage mechanism 3.
The filtering sidewall 221 is formed around the hollow cavity 222 and is communicated with the storage mechanism 3 through the hollow cavity 222, so that the end of the surrounding filtering sidewall 221 can be fixed on the first container 21, and the filtering structure 22 can be fixed conveniently.
In some embodiments, the filtering structure 22 further includes a support tube 223, where a wall of the support tube 223 is provided with a plurality of through holes, and the filtering sidewall 221 is disposed on the support tube 223 along a circumferential direction of the support tube 223, and one end of the support tube 223 is connected to the storage mechanism 3.
The support tube 223 in this embodiment may be a round tube or a square tube.
Optionally, a plurality of through holes are provided at intervals in the circumferential direction and/or the axial direction of the support tube body 223. The axial direction refers to the longitudinal direction of the support tube 223.
In this embodiment, the filtering sidewall 221 is disposed on the supporting tube 223 along the circumferential direction of the supporting tube 223, that is, the filtering sidewall 221 is connected to the supporting tube 223 along the entire circumferential direction of the supporting tube 223.
The filtering sidewall 221 in this embodiment may be directly attached to the supporting tube 223, or may have other structures capable of allowing the target liquid to pass through between the filtering sidewall 221 and the supporting tube 223.
At least part of the space where the support tube 223 is located in this embodiment is the hollow cavity 222 described above.
The support pipe body 223 is provided, and when the filter sidewall 221 is made of a material with low support capacity, the support function can be provided for the filter sidewall 221, so that deformation of the filter sidewall 221 under the impact of target liquid can be reduced. And communication of the hollow cavity 222 with the storage mechanism 3 is also facilitated.
Alternatively, the support pipe body 223 is connected to the first container 21 at one end thereof communicating with the storage mechanism 3. And/or the other end of the support pipe body 223 is connected to the first container 21.
In some embodiments, the first container 21 includes a base 212 and a body 213, the body 213 is connected to the base 212 and encloses a first accommodating cavity 211 with the base 212, and an end of the support tube 223 communicating with the storage mechanism 3 is disposed on the base 212.
The base 212 and the body 213 of the embodiment of the present application may be connected in a fixed manner, such as welding, bonding, or may be connected in a detachable manner. Optionally, the base 212 and the body 213 are screwed or fastened or snapped.
One end of the support tube 223 in communication with the storage mechanism 3 in the embodiment of the present application is disposed on the base 212, which does not represent that the end of the support tube 223 is directly connected to the base 212, but may be merely located at the base 212. Since one end of the support pipe body 223 communicating with the storage mechanism 3 is provided to the base 212, the other end is closer to the top of the first container 21 opposite to the base 212.
The body 213 of the embodiment of the present application has a top opposite to the base 212, and the length direction of the support tube 223 may be parallel to the arrangement direction of the top and the base 212, or may be inclined with respect to the arrangement direction of the top and the base 212.
One end of the support tube 223, which is communicated with the storage mechanism 3, is arranged on the base 212, that is, one end of the support tube 223, which is communicated with the storage mechanism 3, is positioned below the other end, so that the target liquid can flow out under the action of gravity after flowing into the support tube 223 through the filtering side wall 221, and then enters the storage mechanism 3, thereby facilitating the circulation of the target liquid.
In some embodiments, the base 212 is provided with a first feed port 2121 in communication with the feed mechanism 1, and the feed mechanism 1 is in communication with the first receiving chamber 211 through the first feed port 2121.
The first feed port 2121 is provided in the base 212, so that the length and height of the connecting pipe can be reduced as compared with those of the connecting pipe provided in the body 213, thereby facilitating the circulation of the target liquid.
In some embodiments, the filter structure 22 further includes a blocking member 224, where the blocking member 224 covers the other end of the support tube 223 and closes off the orifice of at least a portion of the support tube 223.
The connection mode of the plugging piece 224 and the supporting tube 223 in the embodiment of the application may be welding, integrated forming, bonding, threaded connection, riveting or clamping.
The closure 224 of the present embodiment may be plate-like, bar-like, or other shapes.
The blocking piece 224 is provided to block at least part of the nozzles of the support pipe body 223, so that the volume of the target liquid entering the support pipe body 223 without being filtered can be reduced, and the filtering effect of the target liquid can be improved.
Alternatively, the blocking member 224 covers the entire nozzle at the other end of the support tube 223. To further reduce or even prevent the target liquid from entering the support pipe body 223 without being filtered, and to improve the filtering effect of the target liquid.
In some embodiments, the filter structure 22 further includes a filter end wall connected to the filter side wall 221 and covering at least a portion of the orifice at the other end of the support tube body 223.
The filter end walls of the embodiments of the present application may use the same filter material as the filter side walls 221 or may use a different filter material than the filter side walls 221.
Optionally, the filter sidewall 221 is integrally formed with the filter end wall.
The filter end wall is provided to close at least part of the nozzle of the support pipe body 223, so that the volume of the target liquid entering the support pipe body 223 without being filtered can be reduced, and the filtering effect of the target liquid can be improved. And also increases the filtering surface area of the filter structure 22, improving the filtering capability of the filter structure 22.
Optionally, the filter end wall covers the entire orifice at the other end of the support tube 223.
In some embodiments, the filter mechanism 2 further includes a pressurizing member 23, and the pressurizing member 23 is in communication with the first accommodating chamber 211 and is configured to increase the air pressure of the first accommodating chamber 211.
The pressurizing member 23 of the embodiment of the present application may be an air pump or a blower.
The pressurizing member 23 is provided to increase the air pressure of the first accommodating chamber 211, which increases the speed of the target liquid entering the hollow chamber 222, thereby improving the filtering efficiency.
Fig. 5 is another schematic structural view of a filtering mechanism of a recycling device according to some embodiments of the present disclosure.
Referring to fig. 5, in some embodiments, the filtering mechanism 2 includes a second container 24 and a magnetic attraction structure 25, the second container 24 has a second accommodating cavity 241 in communication with the feeding mechanism 1, the magnetic attraction structure 25 is located in the second accommodating cavity 241 and is used for adsorbing solid impurities of a target liquid, and the second accommodating cavity 241 is in communication with the storage mechanism 3.
The magnetically attractable structure 25 of the present embodiment includes, but is not limited to, an electromagnet or a permanent magnet.
The shape of the magnetic attraction structure 25 of the embodiment of the present application may be a sheet, a block or a strip.
In the NMP liquid recovery process, magnetic metal particles in a pipeline can not enter NMP solution, so that the result of a subsequent magnetic metal particle detection test is affected. Therefore, the magnetic attraction structure 25 is arranged, and the magnetic attraction structure 25 has a good adsorption effect on the magnetic metal particles in the NMP liquid, so that the magnetic metal particles in the NMP liquid are reduced, the purity of the NMP is improved, and the accuracy of the detection test result of the magnetic metal particles in the follow-up slurry is improved.
In some embodiments, the magnetic attraction structure 25 includes a plurality of spaced apart magnetic attraction bars 251.
Alternatively, the number of the magnetic attraction bars 251 is four.
The magnetic suction structure 25 is arranged to comprise a plurality of magnetic suction rods 251 which are arranged at intervals, the rod-shaped magnetic suction structure 25 is large in length and can be fully contacted with NMP liquid, and the adsorption effect is good.
In some embodiments, the second container 24 includes a base portion 242 and a container portion 243, the container portion 243 and the base portion 242 enclose to form a second accommodating cavity 241, the base portion 242 is provided with a second feed inlet 2421 in communication with the feed mechanism 1, the container portion 243 is provided with a discharge outlet 2431 in communication with the storage mechanism 3, and at least part of the magnetic attraction structure 25 is located between the second feed inlet 2421 and the discharge outlet 2431.
The connection manner of the seat portion 242 and the container portion 243 in the embodiment of the present application may be threaded connection, integral molding or clamping connection.
In use, the second container 24 of the present embodiment, the seat 242 is positioned below the container 243.
At least part of the magnetic structure 25 is located between the second inlet 2421 and the outlet 2431, which means that at least part of the magnetic structure 25 is located in a space formed by the second inlet 2421 and the outlet 2431 in the height direction.
The second inlet 2421 is disposed on the base 242, and the outlet 2431 is disposed on the container 243, so that the target liquid entering from the second inlet 2421 contacts the magnetic structure 25 and then enters the outlet 2431 from above, thereby increasing the contact area between the target liquid and the magnetic structure 25 and reducing the outflow of the target liquid without being filtered by the magnetic structure 25.
In some embodiments, the filtering mechanism 2 includes a first container 21 and a filtering structure 22, the first container 21 having a first accommodation chamber 211 in communication with the feeding mechanism 1, the filtering structure 22 being disposed in the first accommodation chamber 211 and being used for filtering solid impurities in the target liquid. The second container 24 communicates between the first container 21 and the storage mechanism 3.
The second container 24 is disposed between the first container 21 and the storage mechanism 3, the target liquid can be filtered through the filtering structure 22 in the first container 21, and then the magnetic metal particles are adsorbed through the magnetic attraction structure 25, so that the cleaning frequency of the magnetic attraction structure 25 can be reduced.
In some embodiments, the feed mechanism 1 includes a buffer vessel 11, the buffer vessel 11 being in communication with the filtration mechanism 2.
The cache container 11 of the embodiment of the present application may be a cache can or a cache box.
The buffer container 11 is provided to store the NMP solution, so that the NMP solution can be filtered after being accumulated to a certain volume, and the loss caused by long-time use of the recovery device 100 can be reduced.
In some embodiments, the recovery device 100 further comprises a power mechanism 4, the power mechanism 4 being in communication with the feed mechanism 1 and configured to power the flow of the target liquid.
The power mechanism 4 of the embodiment of the present application may be a vacuum pump or a water pump.
The power mechanism 4 is adopted to provide power for the target liquid, so that the flow speed of the target liquid can be increased, and the recovery efficiency of the target liquid can be improved.
In some embodiments, the power mechanism 4 is disposed between the feed mechanism 1 and the filter mechanism 2.
The power mechanism 4 is communicated between the feeding mechanism 1 and the filtering mechanism 2, so that the efficiency of target liquid entering the filtering mechanism 2 is quickened, and the filtering efficiency is improved.
Referring to fig. 2-5, an embodiment of the present application provides a recycling apparatus 100, which includes a feeding mechanism 1, a filtering mechanism 2, and a storage mechanism 3. The feeding mechanism 1 is used for receiving target liquid to be filtered; the filtering mechanism 2 is communicated with the feeding mechanism 1 and is used for receiving the target liquid and filtering solid impurities in the target liquid; the storage means 3 is in communication with the filtering means 2 and is used for storing the filtered target liquid. The filter mechanism 2 includes a first container 21 and a filter structure 22, the first container 21 having a first accommodation chamber 211 communicating with the feed mechanism 1, the filter structure 22 being provided in the first accommodation chamber 211 and for filtering solid impurities in a target liquid.
The filter structure 22 includes a filter sidewall 221, and the filter sidewall 221 is used for filtering the target liquid and surrounds a hollow cavity 222, and the filter mechanism 2 is communicated with the storage mechanism 3 through the hollow cavity 222. The filtering structure 22 further comprises a supporting tube body 223, the tube wall of the supporting tube body 223 is provided with a plurality of through holes, the filtering side wall 221 is arranged on the supporting tube body 223 along the circumferential direction of the supporting tube body 223, and one end of the supporting tube body 223 is communicated with the storage mechanism 3. The first container 21 includes a base 212 and a body 213, the body 213 is connected to the base 212 and encloses with the base 212 to form a first accommodating chamber 211, and one end of a support tube 223 communicating with the storage mechanism 3 is disposed on the base 212. The filter structure 22 further comprises a blocking member 224, wherein the blocking member 224 covers the other end of the support tube 223 and closes the orifice of at least part of the support tube 223. The filter mechanism 2 includes a second container 24 and a magnetic attraction structure 25, the second container 24 has a second accommodation chamber 241 communicating with the feed mechanism 1, the magnetic attraction structure 25 is located in the second accommodation chamber 241 and is used for adsorbing solid impurities of a target liquid, and the second accommodation chamber 241 communicates with the storage mechanism 3. The second container 24 communicates between the first container 21 and the storage mechanism 3.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with other technical solutions, which may not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. A recycling apparatus, comprising:
a feed mechanism for receiving a target liquid to be filtered;
a filtering mechanism communicated with the feeding mechanism and used for receiving the target liquid and filtering solid impurities in the target liquid;
the storage mechanism is communicated with the filtering mechanism and is used for storing the filtered target liquid;
the filtering mechanism comprises a second container and a magnetic attraction structure, the second container is provided with a second containing cavity communicated with the feeding mechanism, the magnetic attraction structure is positioned in the second containing cavity and is used for adsorbing magnetic metal particles of the target liquid, and the second containing cavity is communicated with the storage mechanism;
the filtering mechanism comprises a first container and a filtering structure, wherein the first container is provided with a first accommodating cavity communicated with the feeding mechanism, and the filtering structure is arranged in the first accommodating cavity and is used for filtering solid impurities in the target liquid;
the filtering structure comprises a filtering side wall surrounding a hollow cavity, the filtering side wall is used for filtering the target liquid, and the filtering mechanism is communicated with the storage mechanism through the hollow cavity;
the filtering structure further comprises a supporting pipe body, wherein a plurality of through holes are formed in the pipe wall of the supporting pipe body, the filtering side wall is arranged on the supporting pipe body along the circumferential direction of the supporting pipe body, and one end of the supporting pipe body is communicated with the storage mechanism;
the first container comprises a base and a body, the body is connected to the base and is surrounded with the base to form a first accommodating cavity, and one end, communicated with the storage mechanism, of the supporting tube body is arranged on the base;
the filter mechanism further comprises a pressurizing piece which is communicated with the first accommodating cavity and used for increasing the air pressure of the first accommodating cavity.
2. The recycling apparatus according to claim 1, wherein the base is provided with a first feed port communicating with the feed mechanism, and the feed mechanism communicates with the first accommodation chamber through the first feed port.
3. The recovery device of claim 1, wherein the filter structure further comprises a blocking member that covers the other end of the support tube body and closes the orifice of at least a portion of the support tube body.
4. The recovery device of claim 1, wherein the filter structure further comprises a filter end wall connected to the filter side wall and covering at least a portion of the spout at the other end of the support tube body.
5. The recycling apparatus according to any one of claims 1 to 4, wherein the magnetic attraction structure comprises a plurality of magnetic attraction bars arranged at intervals.
6. The recycling apparatus according to any one of claims 1 to 4, wherein the second container comprises a base portion and a container portion, the container portion and the base portion are surrounded to form the second accommodating chamber, the base portion is provided with a second feed port communicated with the feed mechanism, the container portion is provided with a discharge port communicated with the storage mechanism, and at least part of the magnetic attraction structure is located between the second feed port and the discharge port.
7. The recovery device of any one of claims 1-4, wherein when the filter mechanism comprises a first reservoir and a filter structure, the second reservoir is in communication between the first reservoir and the storage mechanism.
8. The recycling apparatus according to claim 1, wherein the feeding mechanism comprises a buffer container, the buffer container being in communication with the filtering mechanism.
9. The recovery device of claim 1, further comprising a power mechanism in communication with the feed mechanism and configured to power the flow of the target liquid.
10. The recovery device of claim 9, wherein the power mechanism is disposed between the feed mechanism and the filtration mechanism.
11. A battery production system, comprising:
a feeding device for supplying slurry;
a coating device for coating a slurry on the current collector;
drying means for drying the slurry on the current collector;
recovery device, being a recovery device according to any one of claims 1-10, for recovering the target liquid of the slurry evaporated in the drying device.
12. The battery production system of claim 11, wherein the target liquid comprises N-methyl pyrrolidone.
CN202310641441.9A 2023-06-01 2023-06-01 Recovery device and battery production system Active CN116351565B (en)

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