A lithium battery slurry iron removal device and method

Abstract

This invention relates to the field of lithium battery technology, and more particularly to a lithium battery slurry iron removal device and method, comprising: a cylindrical body having a slurry storage tank at its bottom and an inlet pipe and an outlet pipe communicating with the slurry storage tank; an iron-attracting mechanism at the top of the cylindrical body, including a lifting assembly and an iron-attracting assembly fixed to the cylindrical body, the iron-attracting assembly including an electromagnet extending into the slurry storage tank; an identification mechanism fixed to the cylindrical body facing the slurry storage tank for identifying whether there is iron powder on the electromagnet, the cylindrical body having a transparent viewing window at a corresponding position in the slurry storage tank, the identification mechanism including a camera facing the viewing window and a controller electrically connected to the camera; a cleaning mechanism fixed inside the cylindrical body having a brush head that can be relatively moved to fit against the outer wall of the electromagnet; and an adsorption mechanism fixed inside the cylindrical body, including a driving assembly and an adsorption cover surrounding the electromagnet, the driving assembly being connected to the adsorption cover for adsorbing and collecting iron powder falling from the electromagnet. This invention also claims protection for a lithium battery slurry iron removal method.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a lithium battery slurry iron removal device and method. Background Technology

[0002] Lithium batteries can be broadly classified into lithium metal batteries and lithium-ion batteries. During the production process of lithium batteries, ferromagnetic metal impurities are usually mixed into the battery slurry, which are difficult to remove. When the battery is charged, when the voltage reaches the oxidation-reduction potential of these impurities, the impurities will oxidize from the positive electrode and then be reduced from the negative electrode. When the metal elements in the negative electrode accumulate to a certain extent, the deposited metal edges will pierce the separator, causing a short circuit and posing a safety hazard. Therefore, it is necessary to remove the ferromagnetic impurities in the lithium battery slurry.

[0003] In the prior art, most lithium battery slurry iron removers use electromagnets to adsorb iron powder from the slurry during use, thereby achieving the effect of iron removal. For example, Chinese utility model patent CN213557679U, published on June 29, 2021, discloses a lithium battery slurry iron removal filter device, which uses a magnetic sleeve inserted into the cylinder and a strong magnetic rod installed inside the magnetic sleeve to magnetically attract and remove iron from the lithium battery.

[0004] However, when the inventors implemented the above solution, they found that after a long period of use, the magnets would accumulate more and more iron powder on their surface, requiring regular cleaning. Workers would have to remove multiple strong magnetic rods one by one and then clean the surface, which reduced the iron removal efficiency of the lithium battery slurry. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present invention provides an iron removal device and method for lithium battery slurry, which improves iron removal efficiency by automatically identifying and cleaning iron powder.

[0006] According to a first aspect of the present invention, an iron removal apparatus for lithium battery slurry is provided, comprising:

[0007] The cylinder has a slurry storage tank at its bottom for holding slurry, and an inlet pipe and an outlet pipe connected to the slurry storage tank.

[0008] A magnetic attraction mechanism is provided on the top of the cylinder, including a lifting assembly with one end fixed to the cylinder and a magnetic attraction assembly connected to the lifting assembly. The magnetic attraction assembly includes an electromagnet that extends into the slurry storage tank.

[0009] An identification mechanism is fixed on the cylinder in the direction of the slurry storage tank to identify whether there is iron powder on the electromagnet. The cylinder has a transparent viewing window at the corresponding position in the slurry storage tank. The identification mechanism includes a camera facing the viewing window and a controller electrically connected to the camera.

[0010] A cleaning mechanism is fixed inside the cylinder, and the cleaning mechanism has a brush head that can be moved relative to the outer wall of the electromagnet;

[0011] An adsorption mechanism, fixed inside the cylinder, includes a drive assembly and an adsorption cover surrounding the electromagnet. The drive assembly is connected to the adsorption cover and is used to adsorb and collect iron powder falling from the electromagnet.

[0012] In some embodiments of the present invention, the liquid outlet pipe is connected to the bottom of the slurry storage tank, and the bottom of the slurry storage tank is also provided with a filter screen.

[0013] In some embodiments of the present invention, the cylinder includes a bottom cover, the bottom cover is detachably disposed, and the liquid outlet pipe is disposed on the bottom cover.

[0014] In some embodiments of the present invention, the electromagnet has a cylindrical structure and is rotatably mounted.

[0015] In some embodiments of the present invention, the magnet assembly further includes a rotary electrical connector connected to the electromagnet, and a drive motor for driving the electromagnet to rotate.

[0016] In some embodiments of the present invention, the cleaning mechanism further includes a fixed frame, a linear drive member fixed on the fixed frame, and a connecting rod connected to the linear drive member. The other end of the connecting rod is connected to the brush head, which has a semi-circular structure and is arranged opposite to each other.

[0017] In some embodiments of the present invention, the adsorption mechanism further includes an annular pipeline, the adsorption hoods are evenly distributed on the annular pipeline, and the driving component is connected to the annular pipeline.

[0018] In some embodiments of the present invention, at least two layers are arranged on the annular pipeline, and the adsorption hoods on the two layers of the annular pipeline are arranged toward the center of the two layers of the annular pipeline.

[0019] In some embodiments of the present invention, the driving component is a fan, and an adsorption box is connected between the fan and the annular pipeline, wherein an iron powder collection bag is detachably installed inside the adsorption box.

[0020] According to a second aspect of the present invention, a method for removing iron from lithium battery slurry is also provided, comprising the following steps:

[0021] Inject lithium battery slurry into the slurry storage tank;

[0022] Turn on the electromagnet in the magnetic attraction mechanism to attract iron powder in the lithium battery slurry;

[0023] The lithium battery slurry is discharged from the outlet pipe;

[0024] The camera in the drive identification mechanism takes a picture of the electromagnet and checks whether iron powder is adsorbed on the electromagnet. If not, the above steps are repeated. If iron powder is confirmed to be present, the next step is performed.

[0025] The brush head in the driving cleaning mechanism is brought close to the electromagnet, and the lifting component is driven to raise the electromagnet, so that the brush head cleans the surface of the electromagnet. At the same time, the adsorption mechanism is activated, so that the adsorption cover in the adsorption mechanism collects the falling iron powder.

[0026] The beneficial effects of this invention are as follows: This invention delivers slurry into the slurry storage tank through the inlet pipe. The lifting component on the magnetic attraction mechanism extends the electromagnet of the magnetic attraction component into the slurry storage tank. While the electromagnet is energized, it attracts iron powder in the slurry. After the electromagnet has attracted the iron powder in the slurry, the slurry in the storage tank is discharged through the outlet pipe. Next, the camera in the identification mechanism identifies whether there is iron powder on the electromagnet through the transparent viewing window on the slurry storage tank. If there is iron powder on the electromagnet, the iron powder can be cleaned using a brush head fixed inside the cylinder and attached to the outer wall of the electromagnet. At the same time, the falling iron powder is attracted and collected by the adsorption hood. This invention uses the automatic identification function of the identification mechanism in conjunction with the cleaning mechanism and the adsorption mechanism to achieve efficient treatment of iron powder. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the lithium battery slurry iron removal device in an embodiment of the present invention;

[0029] Figure 2 This is a half-sectional structural diagram of the lithium battery slurry iron removal device in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the lithium battery slurry iron removal device from another perspective in an embodiment of the present invention;

[0031] Figure 4This is a schematic diagram of the cleaning mechanism in the lithium battery slurry iron removal device in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the adsorption mechanism in the lithium battery slurry iron removal device in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the bottom cover structure in the lithium battery slurry iron removal device in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the iron-absorbing component in the lithium battery slurry iron removal device in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the drive component in the lithium battery slurry iron removal device in an embodiment of the present invention;

[0036] Figure 9 This is a flowchart illustrating the steps of the iron removal method for lithium battery slurry in an embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] like Figures 1 to 8 The lithium battery slurry iron removal device shown includes: a cylinder 1, an iron-absorbing mechanism 2, an identification mechanism 3, a cleaning mechanism 4, and an adsorption mechanism 5. Among them,

[0041] The bottom of the cylinder 1 has a slurry storage tank 11 for holding slurry, and an inlet pipe 11a and an outlet pipe 11b communicating with the slurry storage tank 11. Figure 1As shown, the bottom of the cylinder 1 is a slurry storage tank 11. The top side of the slurry storage tank 11 is fixedly connected to an inlet pipe 11a, and the bottom of the slurry storage tank 11 is fixedly connected to an outlet pipe 11b. When the outlet pipe 11b is closed, slurry is transported into the slurry storage tank 11 through the inlet pipe 11a so that the slurry reaches the specified height. After the iron powder is adsorbed, the outlet pipe is opened to discharge the clean slurry.

[0042] The magnetic attraction mechanism 2 is located at the top of the cylinder 1, and includes a lifting assembly 21 with one end fixed to the cylinder 1 and a magnetic attraction assembly 22 connected to the lifting assembly 21. The magnetic attraction assembly 22 includes an electromagnet 22a that extends into the slurry storage tank 11. Figure 1 , Figure 2 As shown, the top of the lifting assembly 21 is fixedly connected to the magnet assembly 22. The magnet assembly 22 has an electromagnet 22a that extends into the slurry storage tank 11. When the slurry storage tank 11 is filled with slurry, the lifting assembly 21 lowers the electromagnet 22a into the slurry to attract iron powder in the slurry. After the iron powder is attracted to the electromagnet 22a, the lifting assembly 21 is adjusted to rise, causing the electromagnet 22a to rise synchronously. It should be noted that the lifting assembly 21 can have various structural forms, such as a hydraulic cylinder, a pneumatic cylinder, or a motor screw structure, etc.

[0043] The identification mechanism 3 is fixed on the cylinder 1 facing the slurry storage tank 11, and is used to identify whether there is iron powder on the electromagnet 22a. The cylinder 1 has a transparent viewing window 12 at a corresponding position in the slurry storage tank 11. The identification mechanism 3 includes a camera 31 facing the viewing window 12 and a controller 32 electrically connected to the camera 31. Figure 3 As shown, two transparent viewing windows 12 are arranged opposite each other on the outer wall of the slurry storage tank 11 of the cylinder 1. Two cameras 31 are located on the outer side of the cylinder 1 at positions opposite to the two transparent viewing windows. The cameras 31 observe the iron powder adsorption on the electromagnet 22a in real time through the transparent viewing windows. When the iron powder adsorbed on the electromagnet 22a is close to saturation, the controller 32, which is electrically connected to the camera 31, transmits a signal to raise the lifting mechanism. It should be noted that the number of cameras 31 can be set according to actual needs.

[0044] The cleaning mechanism 4 is fixed inside the cylinder 1, and the cleaning mechanism 4 has a brush head 41 that can be relatively movable to fit against the outer wall of the electromagnet 22a. In this embodiment of the invention, the brush head 41 can be fixed or as shown in the figure. Figure 4 The brush head 41 shown is designed to move laterally. During operation, the movable brush head 41 moves to the vicinity of the electromagnet 22a and contacts its outer wall, brushing away the iron powder. It then retracts laterally. Specifically, when cleaning iron powder, the lifting assembly 21 raises the electromagnet 22a, causing the brush head 41 to contact its outer wall during this ascent, thus scraping off the iron powder.

[0045] The adsorption mechanism 5 is fixed inside the cylinder 1 and includes a drive assembly 51 and an adsorption cover 52 surrounding the electromagnet 22a. The drive assembly 51 is connected to the adsorption cover 52 and is used to adsorb and collect iron powder falling from the electromagnet 22a. Figure 5 As shown, when the brush head 41 on the cleaning mechanism 4 brushes away the iron powder on the electromagnet 22a, the drive component 51 drives the adsorption cover 52 to adsorb the iron powder, thereby improving the collection effect.

[0046] Based on the components and functions of the aforementioned lithium battery slurry iron removal device, this invention also provides a method for removing iron from lithium battery slurry. First, the outlet pipe 11b is closed, and the inlet pipe 11a is opened. The pretreated lithium battery slurry is then transported through the inlet pipe 11a to the slurry storage tank 11 at the bottom of the cylinder 1. Once the slurry reaches a set height, the inlet pipe 11a is closed. By lowering the height of the lifting assembly 21, the electromagnet 22a on the magnetizing assembly 22 extends into the slurry storage tank 11, and the power supply to the electromagnet 22a is turned on, energizing it and making it magnetic, thus attracting iron powder from the pretreated slurry. After the iron powder in the pretreated lithium battery slurry is completely adsorbed, the outlet pipe 11b is opened to discharge the clean lithium battery slurry, and then the inlet pipe 11a is opened again to transport new pretreated slurry, thus circulating the slurry in and out. A camera 31 is located on the outside of the cylinder 1. The camera 31 observes the adsorption of iron powder on the electromagnet 22a in real time through a transparent viewing window 12 on the outer wall of the slurry storage tank 11 of the cylinder 1. When the adsorption of iron powder is close to saturation, a signal is transmitted through the controller 32, which is electrically connected to the camera 31, to move the cleaning mechanism 4 laterally until the brush head 41 is in contact with the outer wall of the electromagnet 22a. At the same time, the lifting mechanism is raised and the adsorption mechanism 5 is driven. On one hand, the brush head 41 brushes off the iron powder on the electromagnet 22a, and on the other hand, the adsorption cover 52 adsorbs and collects the brushed iron powder. After the iron powder on the electromagnet 22a is brushed off, the cleaning mechanism 4 is reset laterally, and the lifting mechanism is lowered back into the slurry storage tank 11. This cycle is repeated to remove iron from the pretreated lithium battery slurry in the slurry storage tank 11.

[0047] This invention uses the aforementioned device and method to remove iron from lithium battery slurry. It primarily employs the automatic identification function of the identification mechanism 3 to clean iron powder, thereby improving the cleaning and collection efficiency of iron removal. This eliminates the need for real-time monitoring by personnel, saving time and manpower and increasing work efficiency. It should be noted that the visual recognition technology used in this embodiment is existing technology. For example, it can be implemented using a convolutional neural network model for training and recognition, or by comparing a captured photograph with a standard photograph.

[0048] In some embodiments of the present invention, the outlet pipe 11b is connected to the bottom of the slurry storage tank 11, and the bottom of the slurry storage tank 11 is also provided with a filter screen 11c. Figure 2 , Figure 6As shown, a filter screen 11c is provided at the bottom of the slurry storage tank 11. After being adsorbed by the electromagnet 22a, the slurry of the lithium battery is discharged from the bottom of the cylinder 1 through the outlet pipe 11b. When discharged, the slurry is further filtered by the filter screen 11c to remove other impurities, making the slurry cleaner.

[0049] For easier replacement and cleaning of filter 11c, please refer to [link / reference needed]. Figure 6 As shown, the cylinder 1 includes a bottom cover 11d, which is detachable, and an outlet pipe 11b is mounted on the bottom cover 11d. After the pretreated lithium battery slurry undergoes multiple iron removal processes, impurities in the filter screen 11c accumulate to a certain amount, requiring replacement and cleaning. The bottom cover 11d of the cylinder 1 can be opened to replace the filter screen 11c. A sealing ring is used at the interface between the cylinder 1 and the bottom cover 11d to prevent the lithium battery slurry from overflowing. It should be noted that the connection method between the cylinder 1 and the bottom cover 11d can be... Figure 6 The threaded connection can also be a locking connection or other structural forms.

[0050] In some embodiments of the present invention, the electromagnet 22a has a cylindrical structure and is rotatably oriented. For example... Figure 7 As shown, the upper ends of multiple electromagnets 22a are fixedly installed above the cylinder 1, and the other ends extend into the slurry storage tank 11. The multiple electromagnets 22a are connected by a belt, which drives the electromagnets 22a to rotate in a fixed position. The rotation of the electromagnets 22a causes the slurry in the slurry storage tank 11 to flow, so as to better flow the slurry to various areas within the adsorption range of the electromagnets 22a, thereby improving the adsorption effect of iron powder.

[0051] In some embodiments of the present invention, the magnet assembly 22 further includes a rotary electrical connector 22b connected to the electromagnet 22a, and a drive motor 22c for driving the electromagnet 22a to rotate. Please continue to refer to Figure 7 As shown, a belt connects the drive motor 22c to the electromagnet 22a. The rotation of the drive belt causes the electromagnet 22a to rotate at a fixed position on the cylinder 1. To allow the electromagnet 22a to rotate 360° without restriction, a rotary electrical connector 22b is used to connect the electromagnet 22a. It should be noted that multiple sets of electromagnets 22a can be fixed to the upper end of the cylinder 1; in this embodiment, there are three, but the number can be increased or decreased depending on the size of the slurry storage tank 11. Similarly, the drive motor 22c can have various structural forms, including a DC motor, an asynchronous motor, or a synchronous motor.

[0052] In some embodiments of the present invention, the cleaning mechanism 4 further includes a fixed frame 40, a linear drive member 42 fixed on the fixed frame 40, and a connecting rod 43 connected to the linear drive member 42. The other end of the connecting rod 43 is connected to a brush head 41, which has a semi-circular structure and is arranged opposite to each other. Figure 4 As shown, when a sufficient amount of iron powder is adsorbed on the electromagnet 22a, the identification mechanism 3 identifies it and transmits the information to the controller 32. The controller 32 controls the linear drive component 42 on the cleaning mechanism 4 to drive the fixed frame to move towards the electromagnet 22a until the brush head 41 is in contact with the outer wall of the electromagnet 22a. A connecting rod 43 is fixedly connected to the fixed frame, and the other end of the connecting rod 43 is connected to the brush head 41. The shape of the brush head 41 is adapted to the shape of the electromagnet 22a, and it has a semi-circular structure. The two brush heads 41 are arranged opposite to each other, and the two brush heads 41 completely wrap around the electromagnet 22a to clean the iron powder on the electromagnet 22a.

[0053] In some embodiments of the present invention, the adsorption mechanism 5 further includes an annular pipe, with adsorption covers 52 evenly distributed on the annular pipe, and the driving component 51 communicating with the annular pipe. For example... Figure 5 As shown, in order to achieve the best collection effect of iron powder on electromagnet 22a, an annular pipe is provided on the outside of electromagnet 22a, and adsorption covers 52 are evenly arranged on the annular pipe to achieve 360° adsorption of iron powder. A driving component 51 is provided on the outside of the annular pipe to achieve the best collection effect of iron powder on electromagnet 22a.

[0054] To improve the adsorption effect of the adsorption mechanism 5, at least two layers of annular pipes are arranged vertically, with the adsorption covers 52 on both layers of annular pipes facing the center of the two layers of annular pipes. Please refer to [link / reference needed]. Figure 2 , Figure 5 As shown, the electromagnet 22a is arranged vertically, and the two annular tubes are arranged with a gap between them. The opening of the upper annular tube faces diagonally downward, and the opening of the lower annular tube faces diagonally upward. The adsorption hoods 52 on the two annular tubes are arranged towards the center of the two annular tubes. When the adsorption hoods 52 adsorb iron powder, the adsorption effect can be improved.

[0055] According to the above-mentioned configuration of the drive component 51 connected to the annular pipeline, such as Figure 8As shown, the driving component 51 is a fan, and an adsorption box 51a is connected between the fan and the annular pipe. An iron powder collection bag 51c is detachably installed inside the adsorption box 51a. In this invention, the fan is connected to the adsorption box 51a, and the other side of the adsorption box 51a is connected to the annular pipe, forming a ventilation duct to adsorb the iron powder on the electromagnet 22a. The iron powder collection bag 51c is detachably installed inside the adsorption box 51a. The adsorbed iron powder is drawn into the iron powder collection bag 51c for collection, reducing pollution. After the electromagnet 22a adsorbs iron powder in the slurry, both the electromagnet 22a and the iron powder will be covered with slurry. This problem can be solved through the following two embodiments. One method involves setting up two separate annular pipes, each controlled by a motor. The lower annular pipe blows hot air upwards, discharging the slurry on the electromagnet 22a into the slurry storage tank 11. The upper annular pipe adsorbs iron powder. The hot air blown works first to remove moisture from the electromagnet 22a and the iron powder. Then, the brush head 41 and the electromagnet 22a are raised and lowered, working in conjunction with the upper adsorption cover 52 and the annular pipes to collect the iron powder. Another method involves installing a heating mesh in the adsorption box 51a. The heating mesh and the iron powder collection bag 51c can be switched at the adsorption port of the adsorption box 51a. First, it switches to the heating mesh, for example, via a guide rail and motor screw, using a fan to blow air inwards for drying. After the electromagnet 22a and the iron powder are dried, it switches to the iron powder collection bag 51c, and the fan reverses direction to collect the iron powder.

[0056] According to a second aspect of the present invention, a method for removing iron from lithium battery slurry is also provided, such as... Figure 9 As shown, the steps include:

[0057] S10: Inject lithium battery slurry into the slurry storage tank 11;

[0058] S20: Activate the electromagnet 22a in the magnetizing mechanism 2 to adsorb iron powder in the lithium battery slurry;

[0059] S30: Discharge the lithium battery slurry from the outlet pipe 11b;

[0060] S40: The camera 31 in the drive identification mechanism 3 takes a picture of the electromagnet 22a and confirms whether iron powder is adsorbed on the electromagnet 22a. If not, repeat the above steps. If iron powder is confirmed to be present, proceed to the next step.

[0061] S50: The brush head 41 in the drive cleaning mechanism 4 approaches the electromagnet 22a and drives the lifting component 21 to raise the electromagnet 22a, so that the brush head 41 cleans the surface of the electromagnet 22a. At the same time, the adsorption mechanism 5 is activated, so that the adsorption cover 52 in the adsorption mechanism 5 collects the falling iron powder.

[0062] The specific implementation steps of the method for removing iron from lithium battery slurry have been described in the above embodiments, and will not be repeated here.

[0063] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery slurry de-ironing device, characterized by, The application relates to a lithium battery slurry deironing device, which comprises the following parts: a cylinder body, an iron suction mechanism, an identification mechanism, a cleaning mechanism and an adsorption mechanism. The cylinder body is provided with a slurry storage tank at the bottom for containing slurry, and an inlet pipe and an outlet pipe which are in communication with the slurry storage tank; the iron suction mechanism is arranged at the top of the cylinder body and comprises a lifting assembly fixed at one end of the cylinder body and an iron suction assembly connected with the lifting assembly; the iron suction assembly comprises an electromagnet which extends into the slurry storage tank; the identification mechanism is fixed on the cylinder body towards the slurry storage tank and is used for identifying whether there is iron powder on the electromagnet; the cylinder body is provided with a transparent inspection window at the corresponding position of the slurry storage tank; the identification mechanism comprises a camera arranged towards the inspection window and a controller electrically connected with the camera; the cleaning mechanism is fixed in the cylinder body and is provided with a brush head which can be relatively moved to be attached to the outer wall of the electromagnet; the adsorption mechanism is fixed in the cylinder body and comprises a driving assembly and an adsorption cover arranged around the electromagnet; the driving assembly is connected with the adsorption cover and is used for adsorbing and collecting the iron powder falling from the electromagnet; the adsorption mechanism further comprises an annular pipeline, the adsorption cover is uniformly distributed on the annular pipeline, and the driving assembly is in communication with the annular pipeline; the annular pipeline is arranged in at least two layers, the adsorption cover on the two layers of the annular pipeline is arranged towards the center direction of the two layers of the annular pipeline, the two layers of the annular pipeline are not in communication, the lower layer of the annular pipeline is used for blowing hot air, and the upper layer of the annular pipeline is used for adsorbing iron powder. The outlet pipe is in communication with the bottom of the slurry storage tank, and the bottom of the slurry storage tank is further provided with a filter screen. The cylinder body comprises a bottom cover which is detachably arranged, and the outlet pipe is arranged on the bottom cover. The electromagnet is in a cylindrical structure and is rotatably arranged. The iron suction assembly further comprises a rotary electrical connector connected with the electromagnet and a driving motor used for driving the electromagnet to rotate. The cleaning mechanism further comprises a fixed frame, a linear driving element fixed on the fixed frame and a connecting rod connected with the linear driving element, one end of the connecting rod is connected with the brush head, the brush head is in a semicircular structure, and the brush heads are oppositely arranged.

2. The lithium battery slurry iron removal device according to claim 1, characterized in that, The driving assembly is a fan, and the fan is further in communication with an adsorption box and the annular pipeline, and an iron powder collecting bag is detachably arranged in the adsorption box.

3. The lithium battery slurry de-ironing device of claim 2, wherein, The lithium battery slurry deironing device is used, and the steps are as follows:

4. The lithium battery slurry de-ironing device of claim 1, wherein, lithium battery slurry is injected into the slurry storage tank; 5. The lithium battery slurry de-ironing device of claim 4, wherein, the electromagnet in the iron suction mechanism is turned on to adsorb the iron powder in the lithium battery slurry; 6. The lithium battery slurry de-ironing device of claim 4, wherein, lithium battery slurry is discharged from the outlet pipe; 7. The lithium battery slurry de-ironing device of claim 1, wherein, the camera in the identification mechanism is driven to take a photo of the electromagnet, and it is confirmed whether there is iron powder on the electromagnet; if not, the above steps are repeated; if it is confirmed that there is iron powder, the next action is performed; 8. A method of removing iron from a lithium battery slurry, characterized by, the brush head in the cleaning mechanism is driven to be close to the electromagnet, the lifting assembly is driven to lift the electromagnet, the surface of the electromagnet is cleaned by the brush head, and the adsorption mechanism is turned on so that the adsorption cover in the adsorption mechanism collects the falling iron powder. ​ ​ ​ ​ ​

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