Lithium ion battery powder online iron removal airflow mixer and mixed iron removal method

Abstract

The invention discloses a lithium ion battery powder online iron removal airflow mixer and a mixed iron removal method. The online iron removal airflow mixer comprises a top cover arranged at the top of the feeding bin, a dust removal filter element mounting plate arranged in the feeding bin and a plurality of dust removal filter elements arranged on the dust removal filter element mounting plate, and the dust removal filter element mounting plate divides the inner space of the feeding bin into a feeding bin upper cavity and a feeding bin lower cavity; a synchronous mixing online iron removal device is also arranged; the synchronous mixing online iron removal device comprises a plurality of electromagnetic iron removal rods which are vertically arranged in the feeding bin at intervals and penetrate through the dust removal filter element mounting plate, and a lifting plate which is arranged in an upper cavity of the feeding bin and is fixedly connected with the upper ends of the electromagnetic iron removal rods; and the first linear execution element is arranged on the top cover cap and is connected with the lifting plate so as to realize up-down movement of the lifting plate and the electromagnetic iron removal rod. The lithium ion battery powder deironing effect and the mixing uniformity are improved, and the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery powder production, and in particular to an online iron removal airflow mixer for lithium ion battery powder and a mixed iron removal method. Background Art

[0002] The lithium battery dry pulverizing and conveying system production line is equipped with an airflow mixer, which is used to fully mix the various lithium battery powder materials produced by the production equipment in the front of the production line. Considering that a small amount of iron particles will inevitably be brought into the lithium battery powder materials during the production process of lithium battery powder materials, the presence of iron elements will reduce the performance of lithium batteries. Therefore, the lithium battery dry pulverizing and conveying system production line is also equipped with several iron removal processes according to different quality requirements.

[0003] In the prior art, a special iron removal device is usually used to remove iron from powder materials. For example, after lithium battery powders are mixed, a dry powder iron remover is used to perform final iron removal on the mixed lithium battery powders. The dry powder iron remover is a separate iron removal device installed on the production line.

[0004] In the prior art, for the mixing of lithium battery powder materials, the airflow mixer is widely used. A typical airflow mixer is a mixed material airflow conveying device (utility model patent authorization publication number CN221369515U), which includes an airflow mixer and a sending tank connected in an upper and lower manner, and the airflow mixer includes a straight cylinder and an inverted cone cylinder connected to the lower end of the straight cylinder, a pulse dust collector connected to the upper end of the straight cylinder, a plurality of material feed valves respectively arranged on the straight cylinder, a gas homogenization device arranged on the inverted cone cylinder, a boiling gas chamber connected to the lower end of the inverted cone cylinder, and a discharge valve connected to the discharge pipe at the lower end of the boiling gas chamber; the lower end discharge port of the discharge pipe is connected to the feed port of the sending tank through a flexible connecting pipe; the airflow mixer is arranged on the upper frame, and a first weighing sensor is arranged between the airflow mixer and the upper frame; the sending tank is arranged on the lower frame, and a second weighing sensor is arranged between the sending tank and the lower frame.

[0005] However, the above-mentioned lithium battery dry crushing and conveying system production line adopts the production process of iron removal by dry powder remover and mixing by air flow mixer, and its shortcomings are as follows: first, the dry powder remover has low purity for iron particles; in addition, the last iron removal process after the lithium battery powder is mixed and before packaging is set up separately after the powder is mixed. On the one hand, setting up a special independent lithium battery powder iron removal process will increase production time and reduce production efficiency. On the other hand, the increase in processes will increase the additional risk of mixing in other foreign elements due to the transportation of powder materials. Secondly, due to the different weights of various lithium battery powders (including the weights caused by different powder densities and the weights caused by different particle diameters), when the lithium battery powder is mixed in the air flow mixer, the lighter powder will move upward to the upper feeding space due to the action of the mixed air flow to form a floating air flow layer of light particles, resulting in the floating air flow layer of light particles and the main mixed powder below forming a layered and separated state after the material mixing is completed, thereby affecting the uniformity of the mixing of various powder materials. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes an online iron removal airflow mixer for lithium ion battery powder and a mixed iron removal method, aiming to overcome the shortcomings of the prior art, improve the iron removal effect of lithium ion battery powder and the uniformity of lithium ion battery powder mixing, and improve the production efficiency of lithium ion battery powder. The specific technical solution is as follows: A lithium-ion battery powder online iron removal airflow mixer, comprising a feed bin, a dust removal component arranged at the upper position of the feed bin and an airflow mixing component docked at the lower position of the feed bin, the dust removal component comprising a top cover arranged at the top of the feed bin, a dust removal filter element mounting plate arranged inside the feed bin, and a number of dust removal filters arranged on the dust removal filter element mounting plate, the dust removal filter element mounting plate divides the internal space of the feed bin into an upper chamber of the feed bin and a lower chamber of the feed bin, and a feed pipe for adding powder material is arranged on the lower chamber of the feed bin; the airflow mixing component comprises an airflow mixing component docked at the lower port of the feed bin. A flow mixing bin and a blowing assembly arranged on the flow mixing bin for blowing air into the flow mixing bin to achieve material mixing; a synchronous mixing online iron removal device is also provided for synchronous online iron removal when mixing lithium-ion battery powder, and the synchronous mixing online iron removal device includes a number of electromagnetic iron removal rods arranged vertically at intervals inside the feed bin and passing through the dust removal filter element mounting plate, a lifting plate arranged in the upper chamber of the feed bin and fixedly connected to the upper ends of the number of electromagnetic iron removal rods respectively, and a first linear actuator arranged on the top cover and connected to the lifting plate to achieve the up and down movement of the lifting plate and the electromagnetic iron removal rods.

[0007] Preferably, the first linear actuator is a pneumatic cylinder or a servo electric cylinder.

[0008] Wherein, the upper chamber of the feed bin is connected to the negative pressure fan through a dust removal pipeline to form a negative pressure dust removal chamber.

[0009] As a further improvement of the present invention, the synchronous hybrid online iron removal device is also provided with an online automatic iron particle recoverer, and the online automatic iron particle recoverer includes an iron removal rod passing hole arranged on the dust removal filter element mounting plate and having a hole diameter larger than the outer diameter of the electromagnetic iron removal rod, and a cylindrical sealing cover is arranged at the upper end of each of the iron removal rod passing holes for covering the iron removal rod passing holes from the top, and a sealing hole for the electromagnetic iron removal rod to pass through is arranged on the top of the cylindrical sealing cover, and a sealing member for sealing the outer circle of the electromagnetic iron removal rod is arranged on the sealing hole, which is located on the dust removal filter element mounting plate. The lower end of each of the iron removal rod passage holes is downwardly provided with an extension sleeve located on the periphery of the electromagnetic iron removal rod, and the lower end of the electromagnetic iron removal rod is provided with a valve head; interconnecting pipes that are interconnected are provided between adjacent cylindrical sealing covers that are closest to each other, and each of the cylindrical sealing covers is connected to an external vacuum cleaner for collecting iron particles through the interconnecting pipe and the iron removal hose connected to the interconnecting pipe; when the electromagnetic iron removal rod moves up until its valve head contacts the lower end hole of the extension sleeve, the lower end hole of the extension sleeve is sealed, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover.

[0010] Preferably, the valve head at the lower end of the electromagnetic iron removal rod is a non-ferromagnetic valve head.

[0011] Preferably, a soft sealing ring is provided at the lower end opening of the extension sleeve to achieve sealing cooperation with the valve head.

[0012] Preferably, the electromagnetic iron removal rod comprises a tube body, an iron core installed inside the tube body, and a coil wound around the outer circle of the iron core, and the non-ferromagnetic valve head is connected to the lower end of the tube body.

[0013] Preferably, a layer of hard alloy wear-resistant coating is provided on the tube surface of the electromagnetic iron removal rod and the surface of the non-ferromagnetic valve head.

[0014] Preferably, a layer of wear-resistant ceramic material may also be sprayed on the surface of the tube body of the electromagnetic iron removal rod.

[0015] Preferably, the non-ferromagnetic valve head may also be made of wear-resistant ceramic material.

[0016] In the present invention, the dust removal filter element mounting plate and the silo wall of the feed silo are connected by a dynamic seal.

[0017] In the present invention, the dust removal filter is vertically arranged downward on the lower end surface of the dust removal filter mounting plate; the extension sleeve is an iron removal filter used to form an iron removal negative pressure airflow in the iron particle suction and iron removal sealed space, and the length dimension of the iron removal filter in the up and down direction is shorter than the length dimension of the dust removal filter in the up and down direction.

[0018] The above-mentioned length dimension of the iron removal filter in the vertical direction is set to be shorter than the length dimension of the dust removal filter in the vertical direction. This is because when the dust removal filter is backblown, the backblowing airflow blown out from a section of filter holes in the lower part of the dust removal filter can blow away the non-ferromagnetic powder on the adjacent electromagnetic iron removal rod, preventing the effective powder of the lithium battery from being accidentally removed, thereby providing accuracy in the removal of iron particles.

[0019] In the present invention, the plurality of dust removal filter elements and the plurality of electromagnetic iron removal rods are arranged alternately on the dust removal filter element mounting plate.

[0020] In order to improve the uniformity of powder material mixing, a lithium-ion battery powder online iron removal airflow mixer of the present invention is also provided with an airflow suppression component for suppressing the upward airflow inside the lower chamber of the feed bin when the powder material is mixed to prevent the separation of powder materials of different weights. The airflow suppression component includes moving the dust filter element mounting plate in the up and down directions and setting it in a position inside the feed bin, and arranging a second linear actuator on the top cover to connect the dust filter element mounting plate to realize the movement of the dust filter element mounting plate in the up and down directions.

[0021] Preferably, the second linear actuator is a pneumatic cylinder or a servo electric cylinder.

[0022] Before the feeding operation, the lifting plate is moved upward by the first linear actuator, driving the electromagnetic iron removal rod at the lower end of the lifting plate to move upward and leave the airflow mixing bin; at the same time, the dust filter element mounting plate is moved upward by the second linear actuator, thereby increasing the space of the lower chamber of the feed bin to form sufficient feeding space; during the feeding process, the dust removal component works so that there is no dust overflow when the external feeding pipe is inserted into the feeding pipe for feeding; after the feeding is completed, the pipe mouth of the feeding pipe is closed; when the powder material is mixed, the lifting plate can be moved downward by the first linear actuator, driving the electromagnetic iron removal rod at the lower end of the lifting plate to move downward and insert it into the powder in the airflow mixing bin, thereby realizing online iron removal while the powder is mixed; at the same time, the dust filter element mounting plate can be moved downward by the second linear actuator, thereby compressing the space of the lower chamber of the feed bin, thereby suppressing the upward airflow inside the lower chamber of the feed bin.

[0023] In the present invention, the dust removal filter element mounting plate and the silo wall of the feed silo are connected by a dynamic seal.

[0024] Preferably, the second linear actuator is a pneumatic cylinder or a servo electric cylinder.

[0025] In the present invention, the airflow suppression component also includes a filter element backblowing device arranged on the feed bin, the filter element backblowing device includes an air bag arranged outside the feed bin and connected to a compressed air source, and a compressed air blowing pipe arranged in the upper chamber of the feed bin and inserted into the inner cavity of the dust removal filter element, the compressed air blowing pipe is connected to the air bag through a backblowing pipeline; when the powder material is mixed, the filter element backblowing device is also started to work, so that the backblowing airflow passes through the dust removal filter element and enters the feed bin, so as to enhance the suppression effect on the upward airflow inside the feed bin.

[0026] Preferably, a pulse solenoid valve is provided on the back-flushing pipeline of the filter element back-flushing device, and the pulse solenoid valve is connected to the control system of the airflow mixer. The control system can realize continuous back-flushing or pulse back-flushing of the dust removal filter element through the pulse solenoid valve.

[0027] Preferably, when the dust filter element needs regular maintenance, the control system uses pulse backflushing; when the powder material is mixed, the control system uses pulse backflushing or continuous backflushing to suppress the upward airflow inside the lower chamber of the feed bin.

[0028] As a further improvement of the present invention, the dust removal filter element includes a straight-cylindrical filter element and a conical plug connected to the lower end opening of the straight-cylindrical filter element with the large end facing upward, an internal air chamber is arranged inside the conical plug, and backblowing suppression holes connected to the internal air chamber are densely arranged on the outer conical surface of the conical plug, and the internal air chamber of the conical plug is connected to a compressed air source through a backblowing suppression enhancement pipeline.

[0029] The above-mentioned conical blocked backflush suppression hole has a larger aperture than the filter hole of the straight filter element, so that a stronger backflush airflow can be backflushed.

[0030] Preferably, the backflush suppression enhancement pipeline is connected to the compressed air source through the air bag.

[0031] Preferably, the flow rate of the back-blowing airflow delivered to the filter holes on the outer cylinder surface of the straight-cylinder filter element is adjustable, and the flow rate of the back-blowing airflow delivered to the back-blowing suppression holes on the conical cylinder surface of the conical blockage is adjustable, so as to further optimize and improve the performance of the airflow suppression component.

[0032] Preferably, one end of the back-blowing pipeline and the back-blowing suppression enhancement pipeline connected to the air bag is connected to an adjustable airflow distribution valve and then connected to the air bag. By setting the adjustable airflow distribution valve, reasonable distribution of compressed air flow inside the back-blowing pipeline and the back-blowing suppression enhancement pipeline is achieved.

[0033] When the powder materials are mixed, a part of the backblowing airflow is backblown laterally and diffused out from the filter holes on the outer cylinder surface of the straight cylinder filter element through the backblowing pipeline, thereby forming a stable air pressure in the upper space of the lower chamber of the feed bin, and another part of the backblowing airflow is backblown obliquely downward and diffused out from the backblowing suppression holes on the surface of the conical cylinder with conical blockage through the backblowing suppression enhancement pipeline, thereby forming a downward pressure airflow that suppresses the airflow from rising, thereby limiting the airflow mixing space of the powder material to a smaller space below the backblowing airflow to achieve sufficient mixing, and further preventing the light powder from rising and separating from the heavy powder, thereby further improving the uniformity of the mixing of light and heavy powders.

[0034] Preferably, a sliding sleeve is further connected to the outer edge of the dust filter element mounting plate, and an annular sealing airbag is provided on the inner silo wall of the feed silo and is sealingly matched with the outer circumferential surface of the sliding sleeve.

[0035] Preferably, the annular sealing airbag may also be arranged on the outer peripheral surface of the sliding sleeve.

[0036] Note that when the annular sealing airbag is arranged on the inner silo wall of the feed silo, it is necessary to appropriately increase the height of the sliding sleeve on the dust filter element mounting plate in the up and down directions.

[0037] Preferably, the annular sealing airbag is connected to an external compressed air source through a pipeline.

[0038] As a further improvement of the present invention, the blowing assembly is an enhanced two-way blowing assembly for enhancing the mixing effect of powder materials, and the enhanced two-way blowing assembly includes a lateral blowing assembly arranged on the walls around the feed bin for blowing lateral airflow into the airflow mixing bin, and a vertical blowing assembly arranged at the bottom of the airflow mixing bin for blowing upward airflow into the airflow mixing bin; the lateral blowing assembly includes a first annular air ring arranged on the periphery of the feed bin and connected to the compressed air source, and a first annular air ring arranged on the wall of the airflow mixing bin and along the airflow mixing bin. A number of blowing seat plates are arranged at intervals in the circumferential direction of the warehouse wall, transverse blowing holes are densely arranged on the blowing seat plates and connected with the interior of the airflow mixing warehouse, and a blowing cover is used to cover the transverse blowing holes on the blowing seat plates, a blowing chamber is formed between the blowing seat plates and the blowing cover, and the blowing chamber is connected to the first annular air ring through a blowing pipeline; a pulse solenoid valve is arranged on the blowing pipeline; the airflow mixing warehouse is a conical airflow mixing warehouse with a large mouth facing upward, and the blowing direction of the transverse blowing holes is inclined upward along the transverse direction toward the interior of the airflow mixing warehouse.

[0039] The lateral blowing assembly and the vertical blowing assembly of the air flow mixing component cooperate with each other to further improve the uniformity of powder material mixing.

[0040] Preferably, the bottom opening of the airflow mixing bin is connected with an inner flange, the inner hole position of the inner flange is downwardly connected with a discharge cone pipe with a large opening facing upward, and a discharge cylinder is vertically arranged upward at the inner center of the discharge cone pipe, the piston rod of the discharge cylinder is arranged upward and an umbrella-shaped valve for unloading is connected to its top; the vertical blowing assembly includes a second annular air ring arranged at the periphery of the airflow mixing bin and connected to a compressed air source, a number of vertical blowing holes vertically arranged on the inner flange and arranged at intervals along the circumference of the inner flange, a vertical blowing pipe docked at the lower end of the vertical blowing hole and connected to the second annular air ring, and a fluidizing cylinder vertically arranged at the lower end of the vertical blowing pipe, the piston rod of the fluidizing cylinder is arranged upward and enters into the vertical blowing pipe, and the top of the piston rod of the fluidizing cylinder is provided with a valve plug for opening or closing the vertical blowing hole.

[0041] Preferably, the lower end of the discharge cone tube is connected to a discharge straight tube, and a wafer-type pneumatic butterfly valve for discharging the material is provided on the discharge straight tube.

[0042] An online iron removal airflow mixing method of an online iron removal airflow mixer for lithium ion battery powder comprises the following steps: (1) Preparation: The control system drives the first linear actuator, so that the lifting plate drives the electromagnetic iron removal rod to move upward synchronously, and the electromagnetic iron removal rod is moved upward to the upper position of the airflow mixing chamber; (2) Feeding: Powdered materials are added into the feed bin through the feed pipe on the lower chamber of the feed bin. When feeding, the dust removal component on the upper part of the feed bin is opened to prevent powder from overflowing. After the feeding is completed, the feed pipe is closed. (3) First mixing: Turn on the horizontal blowing assembly and the vertical blowing assembly on the airflow mixing bin. Under the combined effect of the obliquely upward horizontal airflow of the horizontal blowing assembly and the vertically upward vertical airflow of the vertical blowing assembly, the powder material is mixed for the first time in the airflow mixing bin. (4) Second mixing and iron removal: After the first mixing is completed, the control system drives the first linear actuator so that the lifting plate drives the electromagnetic iron removal rod to move downward synchronously, and each of the electromagnetic iron removal rods is inserted into the powder material in the airflow mixing bin, and the power of the electromagnetic iron removal rod is turned on, so that the outer surface of the electromagnetic iron removal rod generates a magnetic adsorption force; under the joint action of the oblique upward horizontal airflow of the horizontal blowing component and the vertical upward vertical airflow of the vertical blowing component, the powder material is mixed for the second time in the airflow mixing bin; during the second mixing, the material is mixed in the airflow mixing bin and also continuously contacts the electromagnetic iron removal rod, and the iron particles in the powder are adsorbed on the electromagnetic iron removal rod, so that the powder material is mixed online by airflow. (5) Unloading: After the second mixing and iron removal is completed, close the horizontal blowing assembly and the vertical blowing assembly, open the unloading cylinder, so that the umbrella-shaped valve moves upward and opens, and the mixed powder material enters the discharge cone tube. Open the wafer-type pneumatic butterfly valve on the discharge straight pipe at the lower end of the discharge cone tube to realize the unloading of the powder material; (6) Online automatic recovery of iron particles: After the unloading is completed, the control system drives the first linear actuator, so that the lifting plate drives the electromagnetic iron removal rod to move upward synchronously until the valve head at the lower end of the electromagnetic iron removal rod contacts the lower end hole of the extension sleeve, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover, the iron removal rod through hole and the extension sleeve, and the iron particles adsorbed on the electromagnetic iron removal rod are surrounded by the iron particle suction and iron removal sealed space composed of the cylindrical sealing cover, the iron removal rod through hole and the extension sleeve; turn on the external vacuum cleaner connected to the interconnecting pipe of the cylindrical sealing cover, turn off the power of the electromagnetic iron removal rod, and the electromagnetic iron removal rod loses its magnetic adsorption force, causing the iron particles adsorbed on the electromagnetic iron removal rod to be sucked away by the negative pressure and enter the external vacuum cleaner for collection.

[0043] Repeat the above steps (1) to (6) to achieve the coordinated operation of continuous online iron removal and air flow mixing of powder materials.

[0044] As a further improvement of the powder online iron removal airflow mixing method of the lithium ion battery powder online iron removal airflow mixer in the present invention, in at least one mixing step of the step (3) first mixing and the step (4) second mixing and iron removal, the second linear actuator is also turned on to move the dust filter mounting plate of the dust removal component downward, thereby compressing the lower chamber space of the feed bin below the dust filter mounting plate; under the joint action of the oblique upward lateral airflow of the lateral blowing component and the vertical upward vertical airflow of the vertical blowing component, and under the synergistic action of the downward movement of the dust filter mounting plate, the powder material is compressed in a smaller airflow mixing space to achieve boiling fluidization, so that The materials are fully mixed; in at least one of the mixing steps of step (3) the first mixing and step (4) the second mixing and iron removal, the filter element back-blowing device is also correspondingly turned on, so that when the powder materials are mixed, a part of the back-blowing airflow is laterally back-blown and diffused from the filter holes on the outer cylinder surface of the straight filter element, thereby forming a stable air pressure in the upper space of the lower chamber of the feed bin, and another part of the back-blowing airflow is back-blown and diffused obliquely downward from the back-blowing suppression holes on the conical cylinder surface of the conical blockage, thereby forming a downward pressure airflow that suppresses the airflow from rising, thereby limiting the mixing space of the powder materials to a smaller space below the back-blowing airflow for full mixing, thereby further preventing the light powder from rising and separating from the heavy powder.

[0045] Preferably, in the step (6) of online automatic recovery of iron particles, the filter element backblowing device is not closed, and during the rising process of the electromagnetic iron removal rod, the backblowing airflow diffused by lateral backblowing from the filter holes of a section of the straight filter element located in a straight filter element adjacent to the periphery of the electromagnetic iron removal rod and lower than the extension sleeve, and the backblowing airflow diffused by backblowing obliquely downward from the backblowing suppression holes on the outer cone surface of the conical blockage at the lower end of the straight filter element, can blow away the non-iron particles adhering to the surface of the electromagnetic iron removal rod in advance without allowing them to enter the iron particle suction and iron removal sealing space.

[0046] The beneficial effects of the present invention are: First, the present invention provides an online iron removal airflow mixer and a mixed iron removal method for lithium ion battery powder. By arranging a synchronous mixed online iron removal device for synchronous online iron removal during lithium ion battery powder mixing on the airflow mixer, the coordinated operation of continuous online iron removal and airflow mixing of lithium ion battery powder materials is achieved. The dispersedly arranged electromagnetic iron removal rods can fully contact with the powder materials in the airflow mixing circulation, thereby improving the iron removal effect of the lithium ion battery powder. Moreover, since a separate iron removal process is omitted, the production efficiency of the lithium ion battery powder is improved.

[0047] Second, the present invention provides an online iron removal airflow mixer and a mixed iron removal method for lithium-ion battery powder. The synchronous mixed online iron removal device is also provided with an online automatic iron particle recoverer. After each mixing is completed, the electromagnetic iron removal rod retracts and a negative pressure suction iron particle suction and iron removal sealed space is formed inside the cylindrical sealing cover, thereby cleaning up the iron particles adsorbed on the electromagnetic iron removal rod in time, thereby ensuring the magnetic adsorption performance of the electromagnetic iron removal rod during the next mixing.

[0048] Third, in the online iron removal airflow mixer and mixed iron removal method for lithium-ion battery powder of the present invention, dust removal filters and electromagnetic iron removal rods are arranged alternately on the dust removal filter mounting plate to ensure that there are several dust removal filters arranged adjacent to each electromagnetic iron removal rod. During the retreat of the electromagnetic iron removal rod after each mixing is completed, the filter backflush device is not closed, and the non-ferrous particle powder adhering to the electromagnetic iron removal rod can utilize the backflush effect of the adjacent dust removal filter to blow away the non-ferrous particle powder on the electromagnetic iron removal rod without entering the iron particle suction and iron removal sealing space, thereby avoiding accidental cleaning of effective element powder in the lithium battery, reducing the loss of lithium battery powder, and improving the accuracy of the lithium battery powder formula.

[0049] Fourth, in the online iron removal airflow mixer and mixed iron removal method for lithium-ion battery powder of the present invention, an airflow suppression component is arranged on the feed bin, which can lower the dust removal filter element mounting plate to a position close to the upper part of the airflow mixing bin through a linear actuator, so that the airflow mixing space of the powder material can be compressed in the airflow mixing bin below the dust removal filter element mounting plate, thereby effectively reducing the probability of lighter powder material rising with the airflow to the upper position of the lower chamber of the feed bin, so as to prevent the separation of lighter powder material from heavier powder material due to the upward movement of the mixed airflow during the mixing process, thereby improving the uniformity of the airflow mixing of the powder material.

[0050] Fifth, the present invention provides an online iron removal airflow mixer and mixed iron removal method for lithium-ion battery powder. The improved structure of the airflow suppression component also includes a filter element backflush device connected to the dust removal component. Turning on the filter element backflush device during the airflow mixing process can form a stable airflow layer in the lower chamber of the feed bin to suppress the upward flow of the mixed airflow, thereby further compressing the airflow mixing space of the powder material and improving the uniformity of the airflow mixing of the powder material.

[0051] Sixth, the present invention provides an online iron removal airflow mixer and mixed iron removal method for lithium-ion battery powder. The improved structure of the airflow suppression component also includes a backblowing suppression hole arranged on the conical plugging at the lower end of the straight filter element. When the powder materials are mixed, a part of the backblowing airflow is laterally backblown and diffused from the filter holes on the outer cylinder surface of the straight filter element through the backblowing pipeline, forming a stable air pressure flow that enhances the upper space of the lower chamber of the feed bin, and another part of the backblowing airflow is backblown and diffused obliquely downward from the backblowing suppression holes on the conical cylinder surface of the conical plugging through the backblowing suppression enhancement pipeline, forming a downward pressure airflow that suppresses the airflow from rising. Thereby, the airflow mixing space of the powder material can be limited to a smaller space below the backblowing airflow to achieve sufficient mixing, which further prevents the light powder from moving upward and separating from the heavy powder, thereby further improving the uniformity of the mixing of light and heavy powders.

[0052] Seventh, in the online iron removal airflow mixer and mixed iron removal method for lithium-ion battery powder of the present invention, a conical unloading door is arranged below the airflow mixing bin. While facilitating unloading, the conical structure of the conical unloading door is beneficial to the repeated recombination and remixing of powder materials during the airflow mixing process, thereby further improving the uniformity of powder material mixing.

[0053] Eighth, in the present invention, an online airflow mixer for removing iron from lithium-ion battery powder and a mixed iron removal method, during the powder mixing process, the blowing component, the airflow suppression component and the online iron removal device cooperate with each other to improve the comprehensive performance of the airflow mixer. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1It is a structural schematic diagram of an online iron removal airflow mixer for lithium ion battery powder of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of an online iron removal airflow mixer; Figure 3 It is a schematic diagram of the internal structure of an online iron removal airflow mixer; Figure 4 yes Figure 3 A partial enlarged view of Figure 5 It is a structural schematic diagram of setting a backflush pipeline and a backflush suppression enhancement pipeline on a dust removal filter element.

[0055] In the figure: 1. feed bin, 2. dust removal component, 3. air flow mixing component, 4. top cover, 5. dust filter element mounting plate, 6. dust filter element, 7. feed bin upper chamber, 8. feed bin lower chamber, 9. feed pipe, 10. air flow mixing bin, 11. air flow suppression component, 12. second linear actuator, 13. filter element backflush device, 14. air bag, 15. compressed air injection pipe, 16. backflush pipeline, 17. pulse solenoid valve, 18. straight filter element, 19. conical plug, 20. internal air chamber, 21. backflush suppression hole, 22. backflush suppression enhancement pipeline, 23. sliding sleeve, 24. annular sealing airbag, 25. horizontal blowing component, 26. vertical Towards the blowing assembly, 27, the first annular air ring, 28, the blowing seat plate, 29, the horizontal blowing hole, 30, the blowing cover, 31, the blowing pipeline, 33, the inner flange, 34, the discharge cone pipe, 35, the unloading cylinder, 36, the umbrella valve, 37, the second annular air ring, 38, the vertical blowing hole, 39, the vertical blowing pipe, 40, the fluidizing cylinder, 41, the valve plug, 42, the discharge straight pipe, 43, the clamp-type pneumatic butterfly valve, 44, the synchronous mixing online iron removal device, 45, the electromagnetic iron removal rod, 46, the lifting plate, 47, the first linear actuator, 48, the cylindrical sealing cover, 49, the sealing part, 50, the extension sleeve (iron removal filter element), 51, the valve head, 52, the interconnecting pipe. DETAILED DESCRIPTION

[0056] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Embodiment 1:

[0057] like Figures 1 to 5The figure shows an embodiment of an online iron removal airflow mixer for lithium-ion battery powder of the present invention, comprising a feed bin 1, a dust removal component 2 arranged at the upper position of the feed bin 1, and an airflow mixing component 3 docked at the lower position of the feed bin 1, the dust removal component 2 comprises a top cover 4 arranged at the top of the feed bin 1, a dust removal filter element mounting plate 5 arranged inside the feed bin 1, and a number of dust removal filters 6 arranged on the dust removal filter element mounting plate 5, the dust removal filter element mounting plate 5 divides the internal space of the feed bin 1 into an upper chamber 7 of the feed bin and a lower chamber 8 of the feed bin, and the lower chamber 8 of the feed bin is provided with a feed pipe 9 for adding powder materials; the airflow mixing component 3 comprises a top cover 4 docked at the lower port end position of the feed bin 1 An airflow mixing bin 10 and an air blowing assembly arranged on the airflow mixing bin 10 for blowing airflow into the airflow mixing bin 10 to achieve material mixing; a synchronous mixing online iron removal device 44 is also provided for synchronous online iron removal when mixing lithium-ion battery powder, and the synchronous mixing online iron removal device 44 includes a number of electromagnetic iron removal rods 45 arranged vertically at intervals inside the feed bin 1 and passing through the dust removal filter element mounting plate 5, a lifting plate 46 arranged in the upper chamber 7 of the feed bin and fixedly connected to the upper ends of the number of electromagnetic iron removal rods 45, and a first linear actuator 47 arranged on the top cover 4 and connected to the lifting plate 46 to achieve the up and down movement of the lifting plate 46 and the electromagnetic iron removal rods 45.

[0058] Preferably, the first linear actuator 47 is a pneumatic cylinder or a servo electric cylinder.

[0059] The upper chamber 7 of the feed bin is connected to the negative pressure fan through a dust removal pipeline to form a negative pressure dust removal chamber.

[0060] As a further improvement of the present embodiment, the synchronous mixed online iron removal device 44 is also provided with an online automatic iron particle recoverer, and the online automatic iron particle recoverer includes an iron removal rod passage hole which is arranged on the dust removal filter element mounting plate 5 and has a hole diameter larger than the outer diameter of the electromagnetic iron removal rod 45, and a cylindrical sealing cover 48 is arranged at the upper end of each of the iron removal rod passage holes for covering the iron removal rod passage holes from the top, and a sealing hole for sealing the electromagnetic iron removal rod 45 is arranged on the top of the cylindrical sealing cover 48, and a sealing member 49 for sealing the outer circle 45 of the electromagnetic iron removal rod is arranged on the sealing hole, and each of the iron removal rods located on the dust removal filter element mounting plate 5 An extension sleeve 50 is arranged downward from the lower end of the rod passing hole and is located outside the electromagnetic iron removal rod 45. A valve head 51 is arranged at the lower end of the electromagnetic iron removal rod 45. An interconnecting pipe 52 is arranged between the adjacent cylindrical sealing covers 48 that are closest to each other. Each of the cylindrical sealing covers 48 is connected to an external vacuum cleaner for collecting iron particles through the interconnecting pipe 52 and the iron removal hose connected to the interconnecting pipe 52. When the electromagnetic iron removal rod 45 moves up to the point where its valve head 51 contacts the lower end opening of the extension sleeve 50, the lower end opening of the extension sleeve 50 is sealed, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover 48.

[0061] Preferably, the valve head 51 at the lower end of the electromagnetic iron removal rod 45 is a non-ferromagnetic valve head.

[0062] Preferably, a soft sealing ring is provided at the lower end opening of the extension sleeve 50 to achieve sealing cooperation with the valve head 51 .

[0063] Preferably, the electromagnetic iron removal rod 45 includes a tube body, an iron core installed inside the tube body, and a coil wound around the outer circle of the iron core, and the non-ferromagnetic valve head is connected to the lower end of the tube body.

[0064] Preferably, a layer of hard alloy wear-resistant coating is provided on the tube surface of the electromagnetic iron removal rod 45 and the surface of the non-ferromagnetic valve head 51 .

[0065] Preferably, a layer of wear-resistant ceramic material may also be sprayed on the surface of the tube body of the electromagnetic iron removal rod 45 .

[0066] Preferably, the non-ferromagnetic valve head 51 may also be made of wear-resistant ceramic material.

[0067] In this embodiment, the dust filter element mounting plate 5 is connected to the wall of the feed bin 1 by a dynamic seal.

[0068] In this embodiment, the dust removal filter 6 is vertically arranged downward on the lower end surface of the dust removal filter mounting plate 5; the extension sleeve 50 is an iron removal filter used to form an iron removal negative pressure airflow in the iron particle suction and iron removal sealing space, and the length dimension of the iron removal filter in the up and down direction is shorter than the length dimension of the dust removal filter 6 in the up and down direction.

[0069] The above-mentioned length dimension of the iron removal filter element (extension sleeve 50) in the vertical direction is set to be shorter than the length dimension of the dust removal filter element in the vertical direction. This is so that when the dust removal filter element 6 is backblown, the backblowing airflow blown out from a section of filter holes in the lower part of the dust removal filter element 6 can blow away the non-ferromagnetic powder on the adjacent electromagnetic iron removal rod 45, preventing the effective powder of the lithium battery from being mistakenly removed, thereby providing accuracy in the removal of iron particles.

[0070] In this embodiment, the plurality of dust filter elements 6 and the plurality of electromagnetic iron removal rods 45 are arranged alternately on the dust filter element mounting plate 5 .

[0071] In order to improve the uniformity of powder material mixing, a lithium-ion battery powder online iron removal airflow mixer in this embodiment is also provided with an airflow suppression component 11 for suppressing the upward airflow in the lower chamber 8 of the feed bin when mixing powder materials to prevent the separation of powder materials of different weights. The airflow suppression component 11 includes moving the dust filter element mounting plate 5 in the up and down directions to be set in a position inside the feed bin 1, and arranging a second linear actuator 12 on the top cover 4 to connect the dust filter element mounting plate 5 to realize the movement of the dust filter element mounting plate 5 in the up and down directions.

[0072] Preferably, the second linear actuator 12 is a pneumatic cylinder or a servo electric cylinder.

[0073] Before the feeding operation, the lifting plate 46 is moved upward by the first linear actuator 47, driving the electromagnetic iron removal rod 45 at the lower end of the lifting plate 46 to move upward and leave the airflow mixing bin 10; at the same time, the dust filter element mounting plate 5 is moved upward by the second linear actuator 12, so that the space of the lower chamber 8 of the feed bin is increased to form sufficient feeding space; during the feeding process, the dust removal component 2 works so that there is no dust overflow when the external feeding pipe is inserted into the feeding pipe 9 for feeding; after the feeding is completed, the pipe mouth of the feeding pipe 9 is closed; when the powder material is mixed, the lifting plate 46 can be moved downward by the first linear actuator 47, driving the electromagnetic iron removal rod 45 at the lower end of the lifting plate 46 to move downward and insert into the powder in the airflow mixing bin 19, thereby realizing online iron removal processing while the powder is mixed; at the same time, the dust filter element mounting plate 5 can be moved downward by the second linear actuator 12, so that the space of the lower chamber 8 of the feed bin is compressed, thereby realizing the suppression of the upward airflow inside the lower chamber 8 of the feed bin.

[0074] In this embodiment, the dust filter element mounting plate 5 is connected to the wall of the feed bin 1 by a dynamic seal.

[0075] Preferably, the second linear actuator 12 is a pneumatic cylinder or a servo electric cylinder.

[0076] In this embodiment, the airflow suppression component 11 also includes a filter element backblowing device 13 arranged on the feed bin 1, and the filter element backblowing device 13 includes an air bag 14 arranged outside the feed bin 1 and connected to a compressed air source, and a compressed air blowing pipe 15 arranged in the upper chamber 7 of the feed bin and inserted into the inner cavity of the dust removal filter element 6, and the compressed air blowing pipe 15 is connected to the air bag 14 through a backblowing pipeline 16; when the powder material is mixed, the filter element backblowing device 13 is also started to work, so that the backblowing airflow passes through the dust removal filter element 6 and enters the feed bin 1, so as to enhance the suppression effect on the upward airflow inside the feed bin 1.

[0077] Preferably, a pulse solenoid valve 17 is provided on the backflush pipeline 16 of the filter element backflush device 13, and the pulse solenoid valve 17 is connected to the control system of the air flow mixer. The control system can realize continuous backflush or pulse backflush for the dust removal filter element 6 through the pulse solenoid valve 17.

[0078] Preferably, when the dust filter 6 needs regular maintenance, the control system uses pulse backblowing; when the powder material is mixed, the control system uses pulse backblowing or continuous backblowing to suppress the upward airflow inside the lower chamber 8 of the feed bin.

[0079] As a further improvement of this embodiment, the dust removal filter element 6 includes a straight filter element 18 and a conical plug 19 connected to the lower end opening of the straight filter element 18 with the large end facing upward, the interior of the conical plug 19 is provided with an internal air chamber 20, and the outer conical surface of the conical plug 19 is densely covered with backblowing suppression holes 21 connected to the internal air chamber 20, and the internal air chamber 20 of the conical plug 19 is connected to a compressed air source via a backblowing suppression enhancement pipeline 22.

[0080] The back-blowing suppression hole 21 of the conical plug 19 has a larger aperture than the filtering hole of the straight filter element 18, so that a stronger back-blowing airflow can be back-blown.

[0081] Preferably, the backflush suppression enhancement pipeline 22 is connected to the compressed air source through the air bag 14 .

[0082] Preferably, the flow rate of the back-blowing airflow delivered to the filter holes on the outer cylinder surface of the straight-cylinder filter element 18 is adjustable, and the flow rate of the back-blowing airflow delivered to the back-blowing suppression holes 21 on the conical cylinder surface of the conical plug 19 is adjustable, so as to further optimize and improve the performance of the airflow suppression component 11.

[0083] Preferably, the ends of the back-blowing pipeline 16 and the back-blowing suppression enhancement pipeline 22 connected to the air bag 14 are connected to an adjustable air flow distribution valve and then connected to the air bag 14. By setting the adjustable air flow distribution valve, reasonable distribution of the compressed air flow inside the back-blowing pipeline 16 and the back-blowing suppression enhancement pipeline 22 is achieved.

[0084] When the powder materials are mixed, a part of the backblowing airflow is laterally backblown and diffused from the filter holes on the outer cylinder surface of the straight filter element 18 through the backblowing pipeline 16, forming a stable air pressure in the upper space of the lower chamber 8 of the feed bin, and another part of the backblowing airflow is obliquely backblown and diffused downward from the backblowing suppression holes 21 on the conical cylinder surface of the conical plug 19 through the backblowing suppression enhancement pipeline 22, forming a downward pressure airflow that suppresses the upward flow of the airflow, thereby limiting the airflow mixing space of the powder material to a smaller space below the backblowing airflow to achieve sufficient mixing, and further preventing the light powder from moving upward and separating from the heavy powder, thereby further improving the uniformity of the mixing of light and heavy powders.

[0085] Preferably, a sliding sleeve 23 is further connected to the outer edge of the dust filter element mounting plate 5 , and an annular sealing airbag 24 sealingly matched with the outer peripheral surface of the sliding sleeve 23 is arranged on the inner silo wall of the feed silo 1 .

[0086] Preferably, the annular sealing airbag 24 may also be arranged on the outer peripheral surface of the sliding sleeve 23 .

[0087] Note that when the annular sealing airbag 24 is arranged on the inner wall of the feed bin 1, the height of the sliding sleeve 23 on the dust filter element mounting plate 5 in the vertical direction needs to be appropriately increased.

[0088] Preferably, the annular sealing airbag 24 is connected to an external compressed air source through a pipeline.

[0089] As a further improvement of this embodiment, the blowing assembly is an enhanced two-way blowing assembly for enhancing the mixing effect of powder materials, and the enhanced two-way blowing assembly includes a lateral blowing assembly 25 arranged on the walls around the feed bin 1 for blowing a lateral airflow into the airflow mixing bin 10, and a vertical blowing assembly 26 arranged at the bottom of the airflow mixing bin 10 for blowing an upward airflow into the airflow mixing bin 10; the lateral blowing assembly 25 includes a first annular air ring 27 arranged on the periphery of the feed bin 1 and connected to the compressed air source, and a circumferential spacing of the silo wall 27 arranged on the wall of the airflow mixing bin 10 and along the silo wall of the airflow mixing bin 10. A number of blowing seat plates 28 are arranged at intervals, transverse blowing holes 29 are densely arranged on the blowing seat plates 28 and connected with the interior of the airflow mixing chamber 10, and a blowing cover 30 is used to cover the transverse blowing holes 29 on the blowing seat plate 28, a blowing chamber is formed between the blowing seat plate 28 and the blowing cover 30, and the blowing chamber is connected to the first annular air ring 27 through a blowing pipeline 31; a pulse solenoid valve 17 is arranged on the blowing pipeline 31; the airflow mixing chamber 10 is a conical airflow mixing chamber with a large mouth facing upward, and the blowing direction of the transverse blowing holes 29 is inclined upward along the transverse direction toward the interior of the airflow mixing chamber 10.

[0090] The lateral blowing assembly 25 and the vertical blowing assembly 26 of the air flow mixing component cooperate with each other to further improve the uniformity of powder material mixing.

[0091] Preferably, the bottom opening of the airflow mixing bin 10 is connected with an inner flange 33, the inner hole position of the inner flange 33 is downwardly connected with a discharge cone 34 with a large opening facing upward, and a discharge cylinder 35 is vertically arranged upward at the inner center of the discharge cone 34, the piston rod of the discharge cylinder 35 is arranged upward and an umbrella-shaped valve 36 for discharge is connected to the top thereof; the vertical blowing assembly 26 includes a second annular air ring 37 arranged at the periphery of the airflow mixing bin 10 and connected to the compressed air source, and a vertically arranged A number of vertical air blowing holes 38 are arranged on the inner flange 33 and at intervals along the circumference of the inner flange 33, a vertical air blowing pipe 39 is docked at the lower end of the vertical air blowing holes 38 and connected to the second annular air ring 37, and a fluidizing cylinder 40 is vertically arranged at the lower end of the vertical air blowing pipe 39, the piston rod of the fluidizing cylinder 40 is arranged upward and enters into the vertical air blowing pipe 39, and the top end of the piston rod of the fluidizing cylinder 40 is provided with a valve plug 41 for opening or closing the vertical air blowing hole 38.

[0092] Preferably, the lower end of the discharge cone tube 34 is connected to a discharge straight tube 42 , and a wafer-type pneumatic butterfly valve 43 for discharging is provided on the discharge straight tube 42 . Embodiment 2:

[0093] An online iron removal airflow mixing method of an online iron removal airflow mixer for lithium ion battery powder comprises the following steps: (1) Preparation: The control system drives the first linear actuator 47, so that the lifting plate 46 drives the electromagnetic iron removal rod 45 to move upward synchronously, and the electromagnetic iron removal rod 45 is moved upward to a position above the airflow mixing chamber 10; (2) Feeding: The powder material is added into the feed bin 1 through the feed pipe 9 on the lower chamber 7 of the feed bin. When feeding, the dust removal component 2 on the upper part of the feed bin 1 is opened to prevent the powder from overflowing. After the feeding is completed, the feed pipe 9 is closed; (3) First mixing: The lateral blowing assembly 25 and the vertical blowing assembly 26 on the airflow mixing chamber 20 are turned on. Under the combined effect of the obliquely upward lateral airflow of the lateral blowing assembly 25 and the vertically upward vertical airflow of the vertical blowing assembly 26, the powder material is mixed for the first time in the airflow mixing chamber 10. (4) Second mixing and iron removal: After the first mixing is completed, the control system drives the first linear actuator 47, so that the lifting plate 46 drives the electromagnetic iron removal rod 45 to move downward synchronously, and each of the electromagnetic iron removal rods 45 is inserted into the powder material in the airflow mixing bin 10, and the power of the electromagnetic iron removal rod 45 is turned on, so that the outer surface of the electromagnetic iron removal rod 45 generates a magnetic adsorption force; under the joint action of the oblique upward horizontal airflow of the horizontal blowing component 25 and the vertical upward vertical airflow of the vertical blowing component 26, the powder material is mixed for the second time in the airflow mixing bin 10; in the second mixing, while the material is mixed in the airflow mixing bin 10, it also continuously contacts the electromagnetic iron removal rod 45, and the iron particles in the powder are adsorbed on the electromagnetic iron removal rod 45, so that the powder material is mixed online by airflow. (5) Unloading: After the second mixing and iron removal is completed, close the horizontal blowing assembly 25 and the vertical blowing assembly 26, open the unloading cylinder 35, so that the umbrella-shaped valve 36 moves up and opens, and the mixed powder material enters the discharge cone 34. Open the pneumatic butterfly valve 43 on the discharge straight pipe 42 at the lower end of the discharge cone 34 to realize the unloading of the powder material.

[0094] (6) Automatic online recovery of iron particles: After the unloading is completed, the control system drives the first linear actuator 47, so that the lifting plate 46 drives the electromagnetic iron removal rod 45 to move upward synchronously until the valve head at the lower end of the electromagnetic iron removal rod 45 contacts the lower end hole of the extension sleeve 50, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover 48, the iron removal rod through hole and the extension sleeve 50, and the iron particles adsorbed on the electromagnetic iron removal rod 45 are surrounded by the iron particle suction and iron removal sealed space composed of the cylindrical sealing cover 48, the iron removal rod through hole and the extension sleeve 50; turn on the external vacuum cleaner connected to the interconnecting pipe 52 of the cylindrical sealing cover 48, turn off the power of the electromagnetic iron removal rod 45, and the electromagnetic iron removal rod 45 loses its magnetic adsorption force, causing the iron particles adsorbed on the electromagnetic iron removal rod 45 to be sucked away by the negative pressure and enter the external vacuum cleaner for collection.

[0095] Repeat the above steps (1) to (6) to achieve the coordinated operation of continuous online iron removal and air flow mixing of powder materials.

[0096] As a further improvement of the powder online iron removal airflow mixing method of the lithium ion battery powder online iron removal airflow mixer in the present embodiment, in at least one mixing step of the first mixing in step (3) and the second mixing and iron removal in step (4), the second linear actuator 12 is also turned on to move the dust filter mounting plate 5 of the dust removal component 2 downward, thereby compressing the space of the lower chamber 8 of the feed bin below the dust filter mounting plate 5; under the joint action of the oblique upward lateral airflow of the lateral blowing component 25 and the vertical upward vertical airflow of the vertical blowing component 26, and under the coordinated action of the downward movement of the dust filter mounting plate 5, the powder material is compressed in a smaller airflow mixing space to achieve boiling fluidization. The materials are fully mixed; in at least one of the mixing steps of step (3) the first mixing and step (4) the second mixing and iron removal, the filter element back-blowing device 13 is also correspondingly turned on, so that when the powder materials are mixed, a part of the back-blowing airflow is laterally back-blown and diffused from the filter holes on the outer cylinder surface of the straight filter element 18, thereby forming a stable air pressure in the upper space of the lower chamber 8 of the feed bin, and another part of the back-blowing airflow is back-blown and diffused obliquely downward from the back-blowing suppression holes on the conical cylinder surface of the conical plug 19, thereby forming a downward pressure airflow that suppresses the airflow from rising, thereby limiting the mixing space of the powder materials to a smaller space below the back-blowing airflow for full mixing, thereby further preventing the light powder from rising and separating from the heavy powder.

[0097] Preferably, in the step (6) of online automatic recovery of iron particles, the filter element backblowing device 13 is not closed, and during the rising process of the electromagnetic iron removal rod 45, the backblowing airflow diffused by lateral backblowing from the filter holes of a section of the straight filter element 18 located in the straight filter element 18 adjacent to the periphery of the electromagnetic iron removal rod 45 and lower than the extension sleeve 50, and the backblowing airflow diffused by backblowing obliquely downward from the backblowing suppression holes on the outer cone surface of the conical plug 19 at the lower end of the straight filter element 18, are used to blow away the non-iron particles adhering to the surface of the electromagnetic iron removal rod 45 in advance without allowing them to enter the iron particle suction and iron removal sealing space.

[0098] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lithium ion battery powder online iron removal airflow mixer, characterized in that: The invention comprises a feed bin, a dust removal component arranged at the upper position of the feed bin and an air flow mixing component connected to the lower position of the feed bin, wherein the dust removal component comprises a top cover arranged on the top of the feed bin, a dust filter element mounting plate arranged inside the feed bin, and a number of dust filter elements arranged on the dust filter element mounting plate, wherein the dust filter element mounting plate divides the internal space of the feed bin into an upper chamber of the feed bin and a lower chamber of the feed bin, and a feed pipe for adding powder materials is arranged on the lower chamber of the feed bin; the air flow mixing component comprises an air flow mixing bin connected to the lower port position of the feed bin and an air flow mixing bin arranged at the lower port position of the feed bin. The air flow mixing bin is provided with an air blowing assembly for blowing air flow into the air flow mixing bin to achieve material mixing; a synchronous mixing online iron removal device is also provided for synchronous online iron removal when mixing lithium-ion battery powder, and the synchronous mixing online iron removal device includes a number of electromagnetic iron removal rods arranged vertically at intervals inside the feed bin and passing through the dust filter element mounting plate, a lifting plate arranged in the upper chamber of the feed bin and fixedly connected to the upper ends of the number of electromagnetic iron removal rods respectively, and a first linear actuator arranged on the top cover and connected to the lifting plate to achieve the up and down movement of the lifting plate and the electromagnetic iron removal rods.

2. The online iron removal airflow mixer for lithium ion battery powder according to claim 1, characterized in that: The synchronous hybrid online iron removal device is also provided with an online automatic iron particle recoverer, and the online automatic iron particle recoverer includes an iron removal rod passing hole arranged on the dust removal filter element mounting plate and having a hole diameter larger than the outer diameter of the electromagnetic iron removal rod, and a cylindrical sealing cover for covering the iron removal rod passing hole from the top is arranged at the upper end of each of the iron removal rod passing holes, and a sealing hole for the electromagnetic iron removal rod to pass through is arranged on the top of the cylindrical sealing cover, and a sealing member for sealing the outer circle of the electromagnetic iron removal rod is arranged on the sealing hole, and each of the iron removal rods located on the dust removal filter element mounting plate An extension sleeve is arranged downward from the lower end of the rod passing hole and is located on the periphery of the electromagnetic iron removal rod, and a valve head is arranged at the lower end of the electromagnetic iron removal rod; interconnecting pipes that are interconnected are arranged between adjacent cylindrical sealing covers that are closest to each other, and each of the cylindrical sealing covers is connected to an external vacuum cleaner for collecting iron particles through the interconnecting pipe and the iron removal hose connected to the interconnecting pipe; when the electromagnetic iron removal rod moves up until its valve head contacts the lower end hole of the extension sleeve, the lower end hole of the extension sleeve is sealed, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover.

3. A lithium ion battery powder online iron removal airflow mixer according to claim 2, characterized in that: The dust removal filter is vertically arranged downward on the lower end surface of the dust removal filter mounting plate; the extension sleeve is an iron removal filter for forming an iron removal negative pressure airflow in the iron particle suction and iron removal sealed space, and the length dimension of the iron removal filter in the up and down direction is shorter than the length dimension of the dust removal filter in the up and down direction.

4. The online iron removal airflow mixer for lithium ion battery powder according to claim 1, characterized in that: The plurality of dust removal filter elements and the plurality of electromagnetic iron removal rods are arranged alternately on the dust removal filter element mounting plate.

5. The lithium ion battery powder online iron removal airflow mixer according to claim 1, characterized in that: An airflow suppression component is also provided for suppressing the upward airflow inside the lower chamber of the feed bin when the powder materials are mixed to prevent the separation of powder materials of different weights. The airflow suppression component includes moving the dust filter element mounting plate in the up and down directions and setting it in the internal position of the feed bin, and setting a second linear actuator on the top cover to connect the dust filter element mounting plate to realize the movement of the dust filter element mounting plate in the up and down directions.

6. The lithium ion battery powder online iron removal airflow mixer according to claim 1, characterized in that: The dust removal filter element includes a straight filter element and a conical plug connected to the lower end opening of the straight filter element with the large end facing upward, an internal air chamber is arranged inside the conical plug, and backblowing suppression holes connected to the internal air chamber are densely arranged on the outer conical surface of the conical plug, and the internal air chamber of the conical plug is connected to a compressed air source through a backblowing suppression enhancement pipeline.

7. The lithium ion battery powder online iron removal airflow mixer according to claim 1, characterized in that: The blowing assembly is an enhanced two-way blowing assembly for enhancing the mixing effect of powder materials. The enhanced two-way blowing assembly includes a lateral blowing assembly arranged on the walls around the feed bin for blowing lateral airflow into the airflow mixing bin, and a vertical blowing assembly arranged at the bottom of the airflow mixing bin for blowing upward airflow into the airflow mixing bin; the lateral blowing assembly includes a first annular air ring arranged on the periphery of the feed bin and connected to the compressed air source, and a circumferential space between the walls of the airflow mixing bin and the circumferential space between the walls of the airflow mixing bin. A number of blowing seat plates are arranged at intervals, transverse blowing holes are densely arranged on the blowing seat plates and communicated with the interior of the airflow mixing bin, and a blowing cover is used to cover the transverse blowing holes on the blowing seat plates, a blowing chamber is formed between the blowing seat plates and the blowing cover, and the blowing chamber is connected to the first annular air ring through a blowing pipeline; a pulse solenoid valve is arranged on the blowing pipeline; the airflow mixing bin is a conical airflow mixing bin with a large mouth facing upward, and the blowing direction of the transverse blowing holes is inclined upward along the transverse direction toward the interior of the airflow mixing bin.

8. The lithium ion battery powder online iron removal airflow mixer according to claim 1, characterized in that: The bottom opening of the airflow mixing bin is connected with an inner flange, and the inner hole position of the inner flange is downwardly connected with a discharge cone pipe with a large opening facing upward, and a discharge cylinder is vertically arranged upward at the inner center of the discharge cone pipe, and the piston rod of the discharge cylinder is arranged upward and an umbrella-shaped valve for discharging is connected to its top; the vertical blowing assembly includes a second annular air ring arranged at the periphery of the airflow mixing bin and connected to a compressed air source, a number of vertical blowing holes vertically arranged on the inner flange and arranged at intervals along the circumference of the inner flange, a vertical blowing pipe docked at the lower end of the vertical blowing hole and connected to the second annular air ring, and a fluidizing cylinder vertically arranged at the lower end of the vertical blowing pipe, the piston rod of the fluidizing cylinder is arranged upward and enters into the vertical blowing pipe, and the top of the piston rod of the fluidizing cylinder is provided with a valve plug for opening or closing the vertical blowing hole.

9. A method for mixing powder online iron removal with airflow in an online iron removal airflow mixer for lithium ion battery powder according to any one of claims 1 to 8, characterized in that: The steps include: (1) Preparation: The control system drives the first linear actuator, so that the lifting plate drives the electromagnetic iron removal rod to move upward synchronously, and the electromagnetic iron removal rod is moved upward to the upper position of the airflow mixing chamber; (2) Feeding: Powdered materials are added into the feed bin through the feed pipe on the lower chamber of the feed bin. When feeding, the dust removal component on the upper part of the feed bin is opened to prevent powder from overflowing. After the feeding is completed, the feed pipe is closed. (3) First mixing: Turn on the horizontal blowing assembly and the vertical blowing assembly on the airflow mixing bin. Under the combined effect of the obliquely upward horizontal airflow of the horizontal blowing assembly and the vertically upward vertical airflow of the vertical blowing assembly, the powder material is mixed for the first time in the airflow mixing bin. (4) Second mixing and iron removal: After the first mixing is completed, the control system drives the first linear actuator so that the lifting plate drives the electromagnetic iron removal rod to move downward synchronously, and each of the electromagnetic iron removal rods is inserted into the powder material in the airflow mixing bin, and the power of the electromagnetic iron removal rod is turned on, so that the outer surface of the electromagnetic iron removal rod generates a magnetic adsorption force; under the joint action of the oblique upward horizontal airflow of the horizontal blowing component and the vertical upward vertical airflow of the vertical blowing component, the powder material is mixed for the second time in the airflow mixing bin; during the second mixing, the material is mixed in the airflow mixing bin and also continuously contacts the electromagnetic iron removal rod, and the iron particles in the powder are adsorbed on the electromagnetic iron removal rod, so that the powder material is mixed online by airflow. (5) Unloading: After the second mixing and iron removal is completed, close the horizontal blowing assembly and the vertical blowing assembly, open the unloading cylinder, so that the umbrella-shaped valve moves upward and opens, and the mixed powder material enters the discharge cone tube. Open the wafer-type pneumatic butterfly valve on the discharge straight pipe at the lower end of the discharge cone tube to realize the unloading of the powder material; (6) Online automatic recovery of iron particles: After the unloading is completed, the control system drives the first linear actuator, so that the lifting plate drives the electromagnetic iron removal rod to move upward synchronously until the valve head at the lower end of the electromagnetic iron removal rod contacts the lower end hole of the extension sleeve, thereby forming a negative pressure suction iron particle suction and iron removal sealed space inside the cylindrical sealing cover, the iron removal rod through hole and the extension sleeve, and the iron particles adsorbed on the electromagnetic iron removal rod are surrounded by the iron particle suction and iron removal sealed space composed of the cylindrical sealing cover, the iron removal rod through hole and the extension sleeve; turn on the external vacuum cleaner connected to the interconnecting pipe of the cylindrical sealing cover, turn off the power of the electromagnetic iron removal rod, and the electromagnetic iron removal rod loses its magnetic adsorption force, causing the iron particles adsorbed on the electromagnetic iron removal rod to be sucked away by the negative pressure and enter the external vacuum cleaner for collection.

10. The powder online iron removal airflow mixing method of the lithium ion battery powder online iron removal airflow mixer according to claim 9, characterized in that: In at least one of the mixing steps of step (3) the first mixing and step (4) the second mixing and iron removal, the second linear actuator is also turned on to move the dust filter mounting plate of the dust removal component downward, thereby compressing the lower chamber space of the feed bin below the dust filter mounting plate; under the joint action of the oblique upward lateral airflow of the lateral blowing component and the vertical upward vertical airflow of the vertical blowing component, and under the synergistic action of the downward movement of the dust filter mounting plate, the powder material is compressed in a smaller airflow mixing space to achieve boiling fluidization, so that the material is fully mixed; in the first mixing of step (3) and step (4), the second linear actuator is turned on to move the dust filter mounting plate downward, thereby compressing the lower chamber space of the feed bin below the dust filter mounting plate; under the joint action of the oblique upward lateral airflow of the lateral blowing component and the vertical upward vertical airflow of the vertical blowing component, and under the synergistic action of the downward movement of the dust filter mounting plate, the powder material is compressed in a smaller airflow mixing space to achieve boiling fluidization, so that the material is fully mixed. (4) In at least one mixing step of the second mixing and iron removal, the filter element back-blowing device is also turned on accordingly, so that when the powder materials are mixed, a part of the back-blowing airflow is back-blown and diffused laterally from the filter holes on the outer cylinder surface of the straight cylinder filter element, thereby forming a stable air pressure in the upper space of the lower chamber of the feed bin, and another part of the back-blowing airflow is back-blown and diffused obliquely downward from the back-blowing suppression holes on the conical cylinder surface of the conical blockage, thereby forming a downward pressure airflow that suppresses the airflow from rising, thereby limiting the mixing space of the powder materials to a smaller space below the back-blowing airflow for sufficient mixing, thereby further preventing the light powder from rising and separating from the heavy powder.

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