Filter device and preparation system for nickel-cobalt-manganese precursor

Abstract

A filter device (1) for a nickel-cobalt-manganese precursor, comprising: a tank (11), a filter screen (12), an iron remover (13), a filter inlet valve (14) and a filter outlet valve (15), wherein the tank (11) is provided with a feed inlet (111) and a discharge outlet (112), the feed inlet (111) and the discharge outlet (112) respectively being arranged at two ends of the tank (11) in a first direction (X), the filter inlet valve (14) being arranged at the feed inlet (111), and the filter outlet valve (15) being arranged at the discharge outlet (112); the filter screen (12) is detachably arranged inside the tank (11) and, in the first direction (X), divides the interior of the tank (11) into a feed cavity (113) and a discharge cavity (114), the feed cavity (113) being in communication with the feed inlet (111), and the discharge cavity (114) being in communication with the discharge outlet (112); and the iron remover (13) is mounted on the side wall of the tank (11) and located in the feed cavity (113).

Description

A filtering device and preparation system for nickel-cobalt-manganese precursor Technical Field

[0001] The present application relates to the technical field of battery precursor production equipment, and in particular to a filtering device and preparation system for nickel-cobalt-manganese precursors. Background Art

[0002] As one of the core elements of the lithium-ion battery industry, the production quality of ternary cathode materials will directly affect the core indicators of lithium-ion batteries such as cycle characteristics, safety, battery energy density and cost. The production and preparation of nickel-cobalt-manganese precursors is an important link in this process. The quality of nickel-cobalt-manganese precursors will directly affect the rate performance and safety performance of the cathode materials.

[0003] Currently, the continuous production process is primarily used to produce nickel-cobalt-manganese precursors. However, prolonged operation of the production system can sometimes cause the reactor to experience imbalance, manifesting as an increase in large precursor particles, a sudden increase in specific surface area, and difficulty in controlling the reaction, ultimately leading to a runaway reaction. In existing production systems, if problems are discovered too late, the precursor will experience spherical cracking, impacting product performance. Prompt discovery and adjustments to stabilize the system can take at least three days. During this adjustment period, the only option is to discharge the abnormal reactor material on-site, significantly increasing production costs and risks. Furthermore, foreign matter within the reactor is difficult to remove, inspect, and analyze, impacting product quality across the entire production line and creating the risk of further imbalance.

[0004] Summary of the Invention

[0005] The purpose of this application is to provide a filtering device and preparation system for a nickel-cobalt-manganese precursor, which can not only efficiently separate and recover foreign matter in the nickel-cobalt-manganese precursor, but also reduce the time wasted in reopening the reactor when an abnormality occurs.

[0006] In order to achieve the above-mentioned purpose, the present application provides a filtering device for nickel-cobalt-manganese precursor, comprising: a tank body, a filter screen, an iron remover, a filter inlet valve and a filter outlet valve; the tank body has an inlet and an outlet, the inlet and the outlet are respectively arranged at the two ends of the tank body along a first direction, the filter inlet valve is arranged on the inlet, and the filter outlet valve is arranged on the outlet; the filter screen is detachably arranged inside the tank body, and divides the interior of the tank body into a feed chamber and a discharge chamber along the first direction, wherein the feed chamber is connected to the inlet, and the discharge chamber is connected to the discharge port; the iron remover is installed on the side wall of the tank body and is located in the feed chamber.

[0007] In some embodiments, the iron remover includes a magnetic rod and a steel sleeve, the steel sleeve is sleeved on the magnetic rod, and the steel sleeve is installed on the side wall of the tank body.

[0008] In some embodiments, a mounting opening is further provided on the side wall of the tank body, and the iron remover is detachably mounted on the mounting opening.

[0009] In some embodiments, the iron remover includes a mounting plate and a connecting piece, the iron remover has a plurality of the magnetic rods and a plurality of the steel sleeves, a plurality of mounting holes are provided on the mounting plate, a plurality of the steel sleeves are respectively mounted on the plurality of mounting holes, a plurality of the magnetic rods are respectively arranged in the plurality of the steel sleeves, the mounting plate is detachably mounted on the mounting port, and the ends of the plurality of magnetic rods facing away from the tank body are connected by the connecting piece.

[0010] In some embodiments, the can body includes a top cover and a can body, the top of the can body is open, the top cover is covered on the top of the can body, and the feed port is arranged on the top cover.

[0011] In some embodiments, an observation window is further provided on the top of the tank body, and the observation window is used to observe the internal conditions of the tank body.

[0012] In some embodiments, the tank body also includes a feed cover, which is trumpet-shaped, and the end of the feed cover with a smaller diameter is installed on the feed port and connected to the feed port, and the end of the feed cover with a larger diameter is covered above the iron remover.

[0013] In order to achieve the same purpose, the present application also provides a preparation system for a nickel-cobalt-manganese precursor, comprising an aging tank, a discharge pipe, a transmission pipe, a feeding pump, a reactor and a filtering device for the nickel-cobalt-manganese precursor as described above, wherein the reactor is connected to the feed port through the discharge pipe, the aging tank is connected to the discharge port, the aging tank is connected to the reactor through the transmission pipe, and the feeding pump is arranged on the transmission pipe for pumping the material in the aging tank into the reactor.

[0014] In some embodiments, a flushing device and a waste trough are also included. The side wall of the tank body also has a forward wash port, a backwash port, a slag discharge port and a slag discharge pipe. The forward wash port and the slag discharge port are spaced apart on the side wall of the feed chamber and are communicated with the feed chamber. The backwash port is arranged on the side wall of the discharge chamber and is communicated with the discharge chamber. The slag discharge pipe is connected to the discharge port and is communicated with the discharge chamber. The forward wash port and the backwash port are respectively connected to the flushing device, and the slag discharge port and the slag discharge pipe are respectively connected to the waste trough.

[0015] In some embodiments, the filtering device of the nickel-cobalt-manganese precursor also includes a forward wash valve, a backwash valve, a first slag discharge valve and a second slag discharge valve. The forward wash valve is arranged on the forward wash port, the backwash valve is arranged on the backwash port, the first slag discharge valve is arranged on the slag discharge port, and the second slag discharge valve is arranged on the slag discharge pipe.

[0016] In some embodiments, the filtering device of the nickel-cobalt-manganese precursor further includes a forward wash pipeline and a back wash pipeline. The forward wash pipeline is installed at the forward wash port and extends toward the filter screen. The back wash pipeline is installed at the back wash port and extends toward the filter screen.

[0017] In some embodiments, the reactor comprises a plurality of reactors and a plurality of discharge valves, the discharge pipeline comprises a plurality of branches, the reactors are respectively connected to the plurality of branches, and the discharge valves are respectively arranged on the plurality of branches.

[0018] In some embodiments, two stirring devices are further included, and the two stirring devices are respectively arranged in the reactor and the aging tank.

[0019] In some embodiments, two liquid level measuring devices are further included, and the two liquid level measuring devices are respectively arranged in the reactor and the aging tank.

[0020] In some embodiments, a control device is further included, and the filter inlet valve, the filter outlet valve and the feed pump are electrically connected to the control device respectively.

[0021] Compared with the related art, the filtering device and preparation system of the nickel-cobalt-manganese precursor in the embodiment of the present application have the following beneficial effects: the system adds a filtering device for the nickel-cobalt-manganese precursor between the reactor and the aging tank. When an abnormal situation occurs, the filter inlet valve and the filter outlet valve are opened, so that the abnormal material in the reactor passes through the iron remover and the filter screen in sequence, the iron remover absorbs the magnetic foreign matter, and the filter screen intercepts the foreign matter and large pieces of material. The filtered material then enters the aging tank for aging. After the reactor is inspected and repaired, the material is pumped from the aging tank to the reactor by a feed pump. The whole process can not only efficiently separate and recover the foreign matter in the nickel-cobalt-manganese precursor, but also reduce the time wasted in reopening the reactor when an abnormality occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the main structure of the filtering device for nickel-cobalt-manganese precursor according to an embodiment of the present application;

[0023] FIG2 is a schematic diagram of the internal structure of the filtering device for the nickel-cobalt-manganese precursor according to an embodiment of the present application;

[0024] FIG3 is an exploded view of the filtering device for the nickel-cobalt-manganese precursor according to an embodiment of the present application;

[0025] FIG4 is a schematic diagram of the main structure of the preparation system of the nickel-cobalt-manganese precursor according to an embodiment of the present application.

[0026] In the figure, 1. Filter device for nickel-cobalt-manganese precursor; 11. Tank body; 111. Feed port; 112. Discharge port; 113. Feed cavity; 114. Discharge cavity; 115. Mounting port; 116. Top cover; 117. Tank body; 1171. Forward wash port; 1172. Backwash port; 1173. Slag discharge port; 1174. Slag discharge pipe; 1175. Forward wash pipe; 1176. Backwash pipe; 118. Observation window; 119. Feed cover; 12. Filter; 13. Iron remover; 131. Magnetic rod; 132. Steel sleeve; 133. Mounting plate; 134. Connector; 14. Filter inlet valve; 15. Filter outlet valve; 16. Forward wash valve; 17. Backwash valve; 18. First slag discharge valve; 19. Second slag discharge valve; 2. Aging tank; 3. Discharge pipeline; 4. Transmission pipeline; 5. Feed pump; 6. Reactor; 7. Flushing device; 8. Waste tank; 9. Discharge valve; 10. Stirring device; X, first direction. DETAILED DESCRIPTION

[0027] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] In the description of this application, it should be understood that the terms "upper", "top", "bottom", "inside", "outside", etc. used in this application to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0030] As shown in Figures 1 to 3, a filtering device 1 for a nickel-cobalt-manganese precursor of a preferred embodiment of the present application includes: a tank body 11, a filter screen 12, an iron remover 13, a filter inlet valve 14 and a filter outlet valve 15; the tank body 11 has an inlet 111 and an outlet 112, and the inlet 111 and the outlet 112 are respectively arranged at the two ends of the tank body 11 along the first direction X, the filter inlet valve 14 is arranged on the inlet 111, and the filter outlet valve 15 is arranged on the outlet 112; the filter screen 12 is detachably arranged inside the tank body 11, and divides the interior of the tank body 11 into a feed chamber 113 and a discharge chamber 114 along the first direction X, wherein the feed chamber 113 is connected to the inlet 111, and the discharge chamber 114 is connected to the discharge chamber 112; the iron remover 13 is installed on the side wall of the tank body 11 and is located in the feed chamber 113.

[0031] It should be noted that the mesh size of the filter 12 can be adjusted according to the conditions of the reactor 6.

[0032] Based on the above solution, the device intercepts foreign matter and bulk materials by setting a filter screen 12 in the tank body 11, and adsorbs magnetic foreign matter by setting an iron remover 13, thereby completing the filtering operation of the material.

[0033] As shown in Figures 1 to 3, in some embodiments, for ease of use, the iron remover 13 includes a magnetic rod 131 and a steel sleeve 132. The steel sleeve 132 is sleeved on the magnetic rod 131, and the steel sleeve 132 is installed on the side wall of the tank body 11. When it is necessary to clean the magnetic foreign matter on the steel sleeve 132, it is only necessary to pull the magnetic rod 131 out of the steel sleeve 132 and then clean the steel sleeve 132.

[0034] As shown in Figure 2, in some embodiments, for ease of use, an installation port 115 is further opened on the side wall of the tank body 11, and the iron remover 13 can be detachably installed on the installation port 115. When the iron remover 13 needs to be cleaned or inspected, the iron remover 13 can be quickly pulled out of the tank body 11 through the installation port 115.

[0035] As shown in Figures 2 and 3, in some embodiments, in order to ensure the adsorption effect, the iron remover 13 includes a mounting plate 133 and a connector 134. The iron remover has multiple magnetic rods 131 and multiple steel sleeves 132. Multiple mounting holes are provided on the mounting plate 133. Multiple steel sleeves 132 are respectively installed on the multiple mounting holes. Multiple magnetic rods 131 are respectively arranged in multiple steel sleeves 132. The mounting plate 133 is detachably mounted on the mounting port 115, and the ends of the multiple magnetic rods 131 facing away from the tank body 11 are connected by a connector 134. By setting multiple magnetic rods 131 and multiple steel sleeves 132, the adsorption effect on magnetic foreign matter is enhanced. When cleaning the iron remover 13, by setting the mounting plate 133 and the connector 134, multiple magnetic rods 131 can be taken out at the same time, thereby improving the cleaning efficiency.

[0036] As shown in Figure 2, in some embodiments, for ease of use, the tank body 11 includes a top cover 116 and a tank body 117. The top of the tank body 117 is open, and the top cover 116 covers the top of the tank body 117. The feed port 111 is set on the top cover 116. By setting the tank body 11 as a top cover 116 and a tank body 117 that are easy to disassemble and assemble, the internal structure of the tank body 11 can be easily disassembled and assembled. In addition, since different mesh sizes of filters 12 are required for different materials, the design of the tank body 11 in this way also facilitates the replacement of the filter screen 12.

[0037] As shown in FIG1 , in some embodiments, for ease of use, an observation window 118 is further provided on the top of the tank body 11 . The observation window 118 is used to observe the internal conditions of the tank body 11 , and foreign matter can also be removed through the observation window 118 for analysis to facilitate confirmation of problems with the reactor 6 .

[0038] As shown in Figure 3, in some embodiments, in order to improve the adsorption effect of the iron remover 13, the tank body 11 also includes a feed cover 119, which is trumpet-shaped, and the end of the feed cover 119 with a small diameter is installed on the feed port 111 and is connected to the feed port 111. The end of the feed cover 119 with a large diameter is covered above the iron remover 13 to increase the corresponding area with the iron remover 13.

[0039] As shown in Figure 4, a preparation system of a nickel-cobalt-manganese precursor of a preferred embodiment of the present application includes an aging tank 2, a discharge pipe 3, a transmission pipe 4, a feeding pump 5, a reactor 6 and a filtering device 1 for the nickel-cobalt-manganese precursor as described above. The reactor 6 is connected to the feed port 111 through the discharge pipe 3, the aging tank 2 is connected to the discharge port 112, the aging tank 2 is connected to the reactor 6 through the transmission pipe 4, and the feeding pump 5 is arranged on the transmission pipe 4 for pumping the material in the aging tank 2 into the reactor 6.

[0040] Based on the above scheme, the system adds a filtering device 1 for nickel-cobalt-manganese precursor between the reactor 6 and the aging tank 2. When an abnormal situation occurs, the filter inlet valve 14 and the filter outlet valve 15 are opened, so that the abnormal material in the reactor 6 passes through the iron remover 13 and the filter screen 12 in turn. The iron remover 13 absorbs magnetic foreign matter, and the filter screen 12 intercepts foreign matter and large pieces of material. The filtered material then enters the aging tank 2 for aging. After the reactor 6 is repaired, the material is pumped from the aging tank 2 to the reactor 6 by the feed pump 5. The whole process can not only efficiently separate and recover foreign matter in the nickel-cobalt-manganese precursor, but also reduce the time wasted in reopening the reactor 6 when an abnormality occurs.

[0041] As shown in Figures 1 to 4, in some embodiments, in order to facilitate the maintenance of the filtering device 1 of the nickel-cobalt-manganese precursor, a flushing device 7 and a waste tank 8 are also included. The side wall of the tank body 11 also has a forward wash port 1171, a backwash port 1172, a slag discharge port 1173 and a slag discharge pipe 1174. The forward wash port 1171 and the slag discharge port 1173 are arranged at intervals on the side wall of the feed chamber 113 and are connected to the feed chamber 113. The backwash port 1172 is arranged on the side wall of the discharge chamber 114 and is connected to the discharge chamber 114. The slag discharge pipe 1174 is connected to the discharge port 112 of the tank body 11 and is connected to the discharge chamber 114. The forward wash port 1171 and the backwash port 1172 are respectively connected to the flushing device 7, and the slag discharge port 1173 and the slag discharge pipe 1174 are respectively connected to the waste tank 8.

[0042] As shown in Figures 1 to 4, for ease of operation, the filtering device 1 for nickel-cobalt-manganese precursor also includes a forward wash valve 16, a backwash valve 17, a first slag discharge valve 18 and a second slag discharge valve 19. The forward wash valve 16 is arranged on the forward wash port 1171, the backwash valve 17 is arranged on the backwash port 1172, the first slag discharge valve 18 is arranged on the slag discharge port 1173, and the second slag discharge valve 19 is arranged on the slag discharge pipe 1174.

[0043] In some embodiments, in order to improve the flushing effect of the filter screen 12, the filtering device 1 of the nickel-cobalt-manganese precursor also includes a forward wash pipeline 1175 and a backwash pipeline 1176. The forward wash pipeline 1175 is installed at the forward wash port 1171 and extends toward the filter screen 12. The backwash pipeline 1176 is installed at the backwash port and extends toward the filter screen 12.

[0044] As shown in FIG4 , in some embodiments, for ease of use, multiple reactors 6 and multiple discharge valves 9 are included, the discharge pipeline 3 has multiple branches, the multiple reactors 6 are respectively connected to the multiple branches, and the multiple discharge valves 9 are respectively arranged on the multiple branches.

[0045] As shown in FIG4 , in some embodiments, for ease of use, two stirring devices 10 are further included. The two stirring devices 10 are respectively arranged in the reactor 6 and the aging tank 2 so that the materials in the reactor 6 and the aging tank 2 can be processed more fully.

[0046] As shown in FIG4 , in some embodiments, for ease of use, two liquid level measuring devices (not shown in the drawings) are further included. The two liquid level measuring devices are respectively arranged in the reactor 6 and the aging tank 2. The liquid levels in the reactor 6 and the aging tank 2 are monitored in real time by the liquid level measuring devices.

[0047] In some embodiments, for ease of use, a control device (not shown in the drawings) is further included, and the filter inlet valve 14, filter outlet valve 15 and feed pump 5 are electrically connected to the control device respectively, and automatic control is achieved through the control device.

[0048] In some embodiments, the liquid level measuring device, the feeding pump (5), the discharge valve (9), the stirring device 10, the filter inlet valve (14), the filter outlet valve (15), the forward wash valve (16), the backwash valve (17), the first slag discharge valve (18), and the second slag discharge valve (19) are electrically connected to the control device respectively, and automatic control is achieved through the control device.

[0049] The working process of this application is:

[0050] 1. When the reactor 6 is abnormal and out of control, turn off the reactor 6 and perform the following steps: A. Stop the machine to discharge the material, open the filter inlet valve 14, filter outlet valve 15 and discharge valve 9, and keep the other valves closed. The reactor 6 starts to discharge the material. When the liquid level measuring device on the reactor 6 shows that the liquid level reaches the requirement, turn off the stirring device 10; the magnetic foreign matter in the abnormal material is adsorbed when passing through the iron remover 13, and the larger particles and foreign matter are intercepted by the filter screen 12. The remaining material flows to the aging tank 2. After the material in the reactor 6 is discharged, close the discharge valve 9; B. Restart the material feeding. , open the reactor 6, then open the feed pump 5, and the mixed and aged materials are pumped into the reactor 6; C, automatic cleaning, close the filter inlet valve 14, the filter outlet valve 15 and the discharge valve 9, open the first slag discharge valve 18 and the forward washing valve 16 in sequence, perform the forward washing operation, and flush the intercepted material into the waste tank 8. After a period of time, close the forward washing valve 16, open the second slag discharge valve 19 and the backwash valve 17 in sequence, perform the backwash operation, and the washing liquid flows into the waste tank 8. After a period of time, close the backwash valve 17, the first slag discharge valve 18 and the second slag discharge valve 19, and the intercepted material is made into a slurry in the waste tank 8;

[0051] 2. When the reactor 6 has an abnormality but has not lost control, the reactor 6 remains open and performs the following steps: A: Discharging and punching are carried out simultaneously. The filter inlet valve 14, the filter outlet valve 15, the discharge valve 9, and the punching pump 5 are opened in sequence to start circulating filtration. By controlling the opening of the filter inlet valve 14 and the reactor 6, the liquid level measuring device on the reactor 6 displays that the liquid level does not exceed a certain value. The abnormal material in the reactor 6 flows through the discharge pipe to the aging tank 2 and is fully mixed with the rest of the normal reactor 6 materials to dilute the unstable nickel-cobalt-manganese precursor. The mixed nickel-cobalt-manganese precursor in the aging tank 2 is continuously punched into the reactor 6, and the reaction system is continuously replaced to adjust to a stable state. Foreign matter larger than the gap of the filter screen 12 is intercepted by the filter screen 12; B: Automatic cleaning: After running for a period of time, Close the feed pump 5, filter inlet valve 14, filter outlet valve 15 and discharge valve 9 in sequence, open the first slag discharge valve 18 and forward wash valve 16 in sequence, perform forward wash operation, and flush the intercepted material into the waste tank 8. After a period of time, close the forward wash valve 16, open the second slag discharge valve 19 and backwash valve 17 in sequence, perform backwash operation, and let the washing liquid flow into the waste tank 8. After a period of time, close the backwash valve 17, the first slag discharge valve 18 and the second slag discharge valve 19; C: Jump to step A until the material in the reactor 6 is stable, and jump to the next step when it meets the production requirements; E: Maintain the iron remover 13, take out the magnetic rod 131 of the iron remover 13, clean the magnetic foreign matter, and reinstall it after cleaning.

[0052] In summary, the embodiment of the present application provides a filtering device and preparation system for a nickel-cobalt-manganese precursor, which adds a filtering device 1 for a nickel-cobalt-manganese precursor between the reactor 6 and the aging tank 2. When an abnormal situation occurs, the filter inlet valve 14 and the filter outlet valve 15 are opened, so that the abnormal material in the reactor 6 passes through the iron remover 13 and the filter screen 12 in turn, and the magnetic foreign matter is adsorbed by the iron remover 13, and the foreign matter and large pieces of material are intercepted by the filter screen 12. The filtered material then enters the aging tank 2 for aging. After the reactor 6 is overhauled, the material is pumped from the aging tank 2 to the reactor 6 by the feed pump 5, and the preparation is restarted. The whole process can not only efficiently separate and recover the foreign matter in the nickel-cobalt-manganese precursor, but also reduce the time wasted in reopening the reactor 6 when an abnormality occurs.

Claims

1. A filtering device (1) for a nickel-cobalt-manganese precursor, characterized in that: include: A tank body (11), a filter screen (12), an iron remover (13), a filter inlet valve (14) and a filter outlet valve (15); The tank body (11) has an inlet (111) and an outlet (112), the inlet (111) and the outlet (112) being respectively arranged at two ends of the tank body (11) along a first direction (X), the filter inlet valve (14) being arranged on the inlet (111), and the filter outlet valve (15) being arranged on the outlet (112); The filter screen (12) is detachably arranged inside the tank body (11), and divides the inside of the tank body (11) into a feed chamber (113) and a discharge chamber (114) along the first direction (X), wherein the feed chamber (113) is communicated with the feed port (111), and the discharge chamber (114) is communicated with the discharge port (112); The iron remover (13) is installed on the side wall of the tank body (11) and is located in the feed chamber (113).

2. The filtering device (1) for nickel-cobalt-manganese precursor according to claim 1, characterized in that: The iron remover (13) comprises a magnetic rod (131) and a steel sleeve (132), wherein the steel sleeve (132) is sleeved on the magnetic rod (131), and the steel sleeve (132) is installed on the side wall of the tank body (11).

3. The filtering device for nickel-cobalt-manganese precursor according to claim 2, characterized in that: The side wall of the tank body (11) is also provided with a mounting opening (115), and the iron remover (13) can be detachably mounted on the mounting opening (115).

4. The filtering device for nickel-cobalt-manganese precursor according to claim 3, characterized in that: The iron remover (13) also includes a mounting plate (133) and a connecting piece (134). The iron remover (13) has a plurality of magnetic bars (131) and a plurality of steel sleeves (132). The mounting plate (133) is provided with a plurality of mounting holes. The plurality of steel sleeves (132) are respectively mounted on the plurality of mounting holes. The plurality of magnetic bars (131) are respectively arranged in the plurality of steel sleeves (132). The mounting plate (133) is detachably mounted on the mounting port (115), and the ends of the plurality of magnetic bars (131) facing away from the tank body (11) are connected via the connecting piece (134).

5. The filtering device (1) for nickel-cobalt-manganese precursor according to claim 1, characterized in that: The can body (11) comprises a top cover (116) and a can body (117); the top of the can body (117) is open, the top cover (116) covers the top of the can body (117), and the feed inlet (111) is arranged on the top cover.

6. The filtering device for nickel-cobalt-manganese precursor according to claim 1, characterized in that: The top of the tank body (11) is also provided with an observation window (118), and the observation window (118) is used to observe the internal conditions of the tank body (11).

7. The filtering device for nickel-cobalt-manganese precursor according to claim 1, characterized in that: The tank body (11) further comprises a feed cover (119), which is trumpet-shaped, and the end of the feed cover (119) with a smaller diameter is installed on the feed port (111) and is connected to the feed port (111), and the end of the feed cover (119) with a larger diameter is covered above the iron remover (13).

8. A system for preparing a nickel-cobalt-manganese precursor, characterized in that: The invention comprises an aging tank (2), a discharge pipe (3), a transmission pipe (4), a feed pump (5), a reactor (6) and a filtering device (1) for a nickel-cobalt-manganese precursor as described in any one of claims 1 to 7, wherein the reactor (6) is connected to the feed inlet (111) via the discharge pipe (3), the aging tank (2) is connected to the discharge port (112), the aging tank (2) is connected to the reactor (6) via the transmission pipe (4), and the feed pump (5) is arranged on the transmission pipe (4) for pumping the material in the aging tank (2) into the reactor (6).

9. The system for preparing the cobalt-manganese precursor according to claim 8, characterized in that: The tank body (11) further comprises a flushing device (7) and a waste tank (8). The side wall of the tank body (11) is also provided with a forward flushing port (1171), a reverse flushing port (1172), a slag discharge port (1173) and a slag discharge pipe (1174). The forward flushing port (1171) and the slag discharge port (1173) are arranged at intervals on the side wall of the feed chamber (113) and are communicated with the feed chamber (113). The reverse flushing port (1172) is arranged on the side wall of the discharge chamber (114) and is communicated with the discharge chamber (114). The slag discharge pipe (1174) is connected to the discharge port (112). The forward flushing port (1171) and the reverse flushing port (1172) are respectively connected to the flushing device (7). The slag discharge port (1173) and the slag discharge pipe (1174) are respectively connected to the waste tank (8).

10. The system for preparing the cobalt-manganese precursor according to claim 9, characterized in that: The filtering device (1) for the nickel-cobalt-manganese precursor further comprises a forward wash valve (16), a backwash valve (17), a first slag discharge valve (18), and a second slag discharge valve (19); the forward wash valve (16) is arranged on the forward wash port (1171), the backwash valve (17) is arranged on the backwash port (1172), the first slag discharge valve (18) is arranged on the slag discharge port (1173), and the second slag discharge valve (19) is arranged on the slag discharge pipe (1174).

11. The system for preparing a cobalt-manganese precursor according to claim 9, characterized in that: The filtering device (1) for the nickel-cobalt-manganese precursor further comprises a forward wash pipeline (1175) and a back wash pipeline (1176), wherein the forward wash pipeline (1175) is installed at the forward wash port (1171) and extends toward the filter screen (12), and the back wash pipeline (1176) is installed at the back wash port (1172) and extends toward the filter screen (12).

12. The system for preparing a cobalt-manganese precursor according to claim 8, characterized in that: It comprises a plurality of reaction kettles (6) and a plurality of discharge valves (9), wherein the discharge pipeline (3) has a plurality of branches, the plurality of reaction kettles (6) are respectively connected to the plurality of branches, and the plurality of discharge valves (9) are respectively arranged on the plurality of branches.

13. The system for preparing a cobalt-manganese precursor according to claim 8, characterized in that: It also comprises two stirring devices (10), wherein the two stirring devices (10) are respectively arranged in the reaction kettle (6) and the aging tank (2).

14. The system for preparing a cobalt-manganese precursor according to claim 8, characterized in that: It also includes two liquid level measuring devices, which are respectively arranged in the reactor (6) and the aging tank (2).

15. The system for preparing a cobalt-manganese precursor according to claim 8, characterized in that: It also comprises a control device, and the filter inlet valve (14), the filter outlet valve (15) and the feed pump (5) are electrically connected to the control device respectively.

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