Lithium battery slurry supplying and cleaning system

Abstract

The utility model relates to a lithium battery slurry supplying and cleaning system, comprising: a slurry supplying unit, the slurry supplying unit comprises a slurry storage tank, a feeding branch pipe connected with the slurry storage tank, a discharging branch pipe connected with the slurry storage tank, and a backflow branch pipe connected between the feeding branch pipe and the discharging branch pipe, and the discharging branch pipe is connected with a feeding pump; the pipeline cleaning unit comprises an ultrasonic generator and an ultrasonic transducer fixedly connected to the feeding branch pipe and the discharging branch pipe, and the ultrasonic generator is connected with the ultrasonic transducer. The backflow branch pipe is connected between the feeding branch pipe and the discharging branch pipe, the feeding pump is connected to the discharging branch pipe, and the feeding branch pipe, the slurry storage tank, the discharging branch pipe, the backflow branch pipe and the feeding pump are sequentially connected to form a cleaning loop. In addition, the ultrasonic transducers are installed on the feeding branch pipe and the discharging branch pipe, the ultrasonic transducers emit ultrasonic waves to clean the inner walls of the feeding branch pipe and the discharging branch pipe, and the cleaning efficiency is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery production, and in particular to a lithium battery slurry supply and cleaning system. Background Art

[0002] Lithium batteries are green, high-energy rechargeable batteries. With the continuous advancement of technology, their performance continues to improve, and they have broad application prospects in portable electronic devices, electric vehicles, energy storage, and the national defense industry.

[0003] The slurrying process is an important process in the production of lithium batteries. The so-called slurrying is to mix special solvents and adhesives with powdered positive and negative active materials respectively, and then stir them at high speed to make slurry-like positive and negative electrode materials.

[0004] In the related technology, in the slurry supply system currently in use, if the branch pipe is stagnant for a long time or residual slurry remains, it sometimes causes the slurry to adhere to the inner wall of the pipe and become dry slurry that is difficult to clean. The particles of the dry slurry are mixed with the finished slurry. This slurry will produce dark spots and shrinkage holes when applied to the electrode, which has a great adverse effect on the performance of the battery. Summary of the invention

[0005] The embodiment of the present application provides a lithium battery slurry supply and cleaning system to solve the problem in the related art that after slurry adheres to the slurry supply pipeline, it becomes dry slurry on the inner wall of the pipeline and is difficult to clean.

[0006] The embodiment of the present application provides a lithium battery slurry supply and cleaning system, comprising:

[0007] A slurry supply unit, the slurry supply unit comprising a slurry storage tank, a feed branch pipe connected to the slurry storage tank, a discharge branch pipe connected to the slurry storage tank, a reflux branch pipe connected between the feed branch pipe and the discharge branch pipe, and a feed pump connected to the discharge branch pipe;

[0008] The pipeline cleaning unit includes an ultrasonic generator and an ultrasonic transducer fixedly connected to the feed branch pipe and / or the discharge branch pipe, and the ultrasonic generator is connected to the ultrasonic transducer.

[0009] In some embodiments: the feed branch pipe and / or the discharge branch pipe is provided with a screw connected to the ultrasonic transducer, the ultrasonic transducer is provided with a threaded hole connected to the screw, the discharge branch pipe is connected to the reflux branch pipe through a three-way valve, and a demagnetization mechanism is connected in series to the discharge branch pipe.

[0010] In some embodiments, it further includes a slurry stirring unit. The slurry stirring unit includes a stirring tank. The outlet of the stirring tank is connected to a feeding branch pipe. The outlet of the feeding branch pipe is connected to a main feeding pipeline. A diaphragm pump and a demagnetization mechanism are connected in series on the feeding branch pipe.

[0011] In some embodiments, a screw for connecting the ultrasonic transducer is provided on the feeding branch pipe. A threaded hole for connecting the screw is provided on the ultrasonic transducer. The ultrasonic transducer is connected to the feeding branch pipe through the screw.

[0012] In some embodiments, multiple groups of the slurry supply units are sequentially connected along the length direction of the main feeding pipeline. The multiple groups of the slurry supply units are a transfer slurry supply unit, a tail slurry supply unit, and a head slurry supply unit in sequence.

[0013] In some embodiments, both the feed branch pipe and the discharge branch pipe of the transfer slurry supply unit communicate with the main feeding pipeline. A first valve is provided on the main feeding pipeline. The first valve is used to connect or disconnect the feed branch pipe of the transfer slurry supply unit and the discharge branch pipe of the transfer slurry supply unit.

[0014] In some embodiments, the feed branch pipe of the tail slurry supply unit communicates with the main feeding pipeline, and the feed branch pipe of the head slurry supply unit communicates with the main feeding pipeline;

[0015] A second valve is connected between both the feed branch pipe of the tail slurry supply unit and the feed branch pipe of the head slurry supply unit and the main feeding pipeline;

[0016] A third valve and a fourth valve are provided on the main feeding pipeline. The third valve is located downstream of the feed branch pipe of the tail slurry supply unit, and the fourth valve is located downstream of the feed branch pipe of the head slurry supply unit.

[0017] In some embodiments, a water inlet and a fifth valve are provided at the inlet end of the main feeding pipeline. The end of the main feeding pipeline is connected to a ball collecting bucket. Rubber balls for cleaning the inner wall of the main feeding pipeline are provided in the main feeding pipeline. The spherical surface of the rubber balls is in sliding friction connection with the inner wall of the main feeding pipeline.

[0018] In some embodiments, the inner diameter of the main feeding pipeline is larger than the inner diameters of the feed branch pipe and the discharge branch pipe. The diameter of the rubber balls is larger than the inner diameters of the feed branch pipe and the discharge branch pipe.

[0019] In some embodiments, the discharge branch pipes of both the tail slurry supply unit and the head slurry supply unit are connected to a slurry coating die head.

[0020] The beneficial effects brought by the technical solution provided by this application include:

[0021] An embodiment of the present application provides a lithium battery slurry supply and cleaning system. Since the lithium battery slurry supply and cleaning system of the present application is provided with a slurry supply unit, the slurry supply unit includes a slurry storage tank, a feed branch pipe connected to the slurry storage tank, a discharge branch pipe connected to the slurry storage tank, a reflux branch pipe connected between the feed branch pipe and the discharge branch pipe, and a feeding pump connected to the discharge branch pipe; a pipeline cleaning unit, the pipeline cleaning unit includes an ultrasonic generator, an ultrasonic transducer fixedly connected to the feed branch pipe and the discharge branch pipe, and the ultrasonic generator is connected to the ultrasonic transducer.

[0022] Therefore, the lithium battery slurry supply and cleaning system of the present application is connected with a reflux branch pipe between the feed branch pipe and the discharge branch pipe, and a feeding pump is connected to the discharge branch pipe. The feed branch pipe, the slurry storage tank, the discharge branch pipe, the reflux branch pipe and the feeding pump are sequentially connected to each other to form a cleaning loop. The cleaning liquid in the slurry storage tank circulates and flushes the dry slurry adhering to the feed branch pipe, the slurry storage tank and the discharge branch pipe under the action of the feeding pump. In addition, ultrasonic transducers are installed on the feed branch pipe and the discharge branch pipe, and the ultrasonic generator is connected to the ultrasonic transducers. The ultrasonic transducers emit ultrasonic waves to clean the inner walls of the feed branch pipe and the discharge branch pipe, and the cleaning efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic structural diagram of the lithium battery slurry supply and cleaning system according to the embodiment of the present application;

[0025] Figure 2 is a schematic structural diagram of the slurry stirring unit according to the embodiment of the present application;

[0026] Figure 3 is a schematic structural diagram of the transfer slurry supply unit according to the embodiment of the present application;

[0027] Figure 4 is a schematic structural diagram of the tail slurry supply unit according to the embodiment of the present application;

[0028] Figure 5 is a schematic structural diagram of the pipeline cleaning unit and the feed branch pipe according to the embodiment of the present application;

[0029] Figure 6 is a schematic structural diagram of the ultrasonic transducer and the feed branch pipe according to the embodiment of the present application.

[0030] Reference numerals:

[0031] 1. Intermediate slurry supply unit; 2. Tail slurry supply unit; 3. Head slurry supply unit; 4. Slurry stirring unit; 5. Main feeding pipeline; 6. First valve; 7. Third valve; 8. Fourth valve; 9. Fifth valve; 10. Ball collecting barrel; 11. Slurry storage tank; 12. Feed branch pipe; 13. Discharge branch pipe; 14. Return branch pipe; 15. Three-way valve; 16. Feed pump; 17. Demagnetization mechanism; 18. Second valve; 19. Stirring tank; 20. Feed branch pipe; 21. Diaphragm pump; 22. Ultrasonic generator; 23. Ultrasonic transducer; 24. Screw; 25. Threaded hole. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0033] The embodiments of the present application provide a lithium battery slurry supply and cleaning system, which can solve the problem that it is difficult to clean the dry slurry formed on the inner wall of the slurry supply pipeline after the slurry adheres to the pipeline in the related art.

[0034] See Figures 1 to 5 As shown, the embodiments of the present application provide a lithium battery slurry supply and cleaning system, including:

[0035] A slurry supply unit, which includes a slurry storage tank 11, a feed branch pipe 12 connected to the slurry storage tank 11, a discharge branch pipe 13 connected to the slurry storage tank 11, a return branch pipe 14 connected between the feed branch pipe 12 and the discharge branch pipe 13, and a feed pump 16 connected to the discharge branch pipe 13. The feed branch pipe 12 is connected to the feed port of the slurry storage tank 11, the discharge branch pipe 13 is connected to the discharge port of the slurry storage tank 11, and the feed pump 16 discharges the slurry or cleaning liquid in the slurry storage tank 11 to the discharge branch pipe 13.

[0036] A pipeline cleaning unit, which includes an ultrasonic generator 22 and an ultrasonic transducer 23 fixedly connected to the feed branch pipe 12 and the discharge branch pipe 13, and the ultrasonic generator 22 is connected to the ultrasonic transducer 23. The ultrasonic waves generated by the ultrasonic generator 22 and the ultrasonic transducer 23 cause a very large vibration speed and acceleration of the particles in the cleaning liquid, and also cause the dry slurry on the inner wall surfaces of the feed branch pipe 12 and the discharge branch pipe 13 to be frequently and violently impacted, so that it breaks and falls off.

[0037] In the lithium battery slurry supply and cleaning system according to the embodiment of the present application, a reflux branch pipe 14 is connected between the feed branch pipe 12 and the discharge branch pipe 13, and a feed pump 16 is connected to the discharge branch pipe 13. The feed branch pipe 12, the slurry storage tank 11, the discharge branch pipe 13, the reflux branch pipe 14 and the feed pump 16 are connected to each other in sequence to form a cleaning circuit. The cleaning liquid in the slurry storage tank 11 circulates and flushes the dry slurry adhering to the feed branch pipe 12, the slurry storage tank 11 and the discharge branch pipe 13 under the action of the feed pump 16.

[0038] In addition, ultrasonic transducers 23 are installed on the feed branch pipe 12 and the discharge branch pipe 13 according to the embodiment of the present application, and the ultrasonic generator 22 is connected to the ultrasonic transducers 23. The ultrasonic waves generated by the ultrasonic generator 22 and the ultrasonic transducers 23 cause a large vibration speed and acceleration of the particles in the cleaning liquid, and also cause the dry slurry on the inner wall surfaces of the feed branch pipe 12 and the discharge branch pipe 13 to be frequently and violently impacted, so that it breaks and falls off, and the cleaning efficiency is further improved.

[0039] In some alternative embodiments: Refer to Figure 5 and Figure 6 As shown, the embodiment of the present application provides a lithium battery slurry supply and cleaning system. A screw 24 for connecting the ultrasonic transducer 23 is provided on the discharge branch pipe 13 of the lithium battery slurry supply and cleaning system. A threaded hole 25 for connecting the screw 24 is provided on the ultrasonic transducer 23. The discharge branch pipe 13 and the reflux branch pipe 14 are connected through a three-way valve 15, and a demagnetization mechanism 17 is connected in series on the discharge branch pipe 13.

[0040] According to the embodiment of the present application, a screw 24 for connecting the ultrasonic transducer 23 is provided on the discharge branch pipe 13. A threaded hole 25 for connecting the screw 24 is provided on the ultrasonic transducer 23. The ultrasonic transducer 23 is connected to the screw 24 through the threaded hole 25, and then the ultrasonic transducer 23 is fixedly connected to the feed branch pipe 12 or the discharge branch pipe 13.

[0041] The discharge branch pipe 13 and the reflux branch pipe 14 of the embodiment of the present application are connected through a three-way valve 15, and the three-way valve 15 changes the working mode by switching the path between the discharge branch pipe 13 and the reflux branch pipe 14. When the three-way valve 15 connects the discharge branch pipe 13 and the reflux branch pipe 14, the slurry supply unit is in the cleaning mode. When the three-way valve 15 closes the discharge branch pipe 13 and the reflux branch pipe 14, the slurry supply unit is in the feeding mode.

[0042] A demagnetization mechanism 17 is connected in series on the discharge branch pipe 13 of the embodiment of the present application. A permanent magnet is arranged in the demagnetization mechanism 17. When the slurry flows through the demagnetization mechanism 17, the permanent magnet in the demagnetization mechanism 17 can adsorb the magnetic impurities in the slurry, and it is necessary to reduce or eliminate the magnetic substances in the slurry.

[0043] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a lithium battery slurry supply and cleaning system. The lithium battery slurry supply and cleaning system further includes a slurry stirring unit 4. The slurry stirring unit 4 includes a stirring tank 19. An outlet of the stirring tank 19 is connected to a feed branch pipe 20. An outlet of the feed branch pipe 20 is connected to a main feed pipeline 5. A diaphragm pump 21 and a demagnetization mechanism 17 are connected in series on the feed branch pipe 20. When the slurry stirring unit 4 is in the cleaning mode, the diaphragm pump 21 pumps the cleaning liquid in the stirring tank 19 into the feed branch pipe 20.

[0044] A screw 24 connected to an ultrasonic transducer 23 is provided on the feed branch pipe 20. A threaded hole 25 connected to the screw 24 is provided on the ultrasonic transducer 23. The ultrasonic transducer 23 is connected to the feed branch pipe 20 through the screw 24. The ultrasonic waves generated by the ultrasonic generator 22 and the ultrasonic transducer 23 cause a large vibration speed and acceleration of the particles in the cleaning liquid, and also cause the dry slurry on the inner wall surfaces of the feed branch pipe 12 and the discharge branch pipe 13 to be frequently and violently impacted, thereby causing it to break and fall off, and further improving the cleaning efficiency.

[0045] In some alternative embodiments: Refer to Figure 1 、 Figures 3 to 4 As shown, an embodiment of the present application provides a lithium battery slurry supply and cleaning system. The lithium battery slurry supply and cleaning system is sequentially connected with multiple groups of slurry supply units along the length direction of the main feed pipeline 5. The multiple groups of slurry supply units are, in sequence, a transfer slurry supply unit 1, a tail slurry supply unit 2, and a head slurry supply unit 3.

[0046] The transfer slurry supply unit 1 is used to connect to the slurry stirring unit 4. The slurry stirring unit 4 pumps the stirred finished slurry into the transfer slurry supply unit 1 for temporary storage. The transfer slurry supply unit 1 distributes the finished slurry to the tail slurry supply unit 2 and the head slurry supply unit 3. The tail slurry supply unit 2 and the head slurry supply unit 3 are used to supply materials to the coater respectively, and the coater coats the front and back sides of the substrate respectively.

[0047] In some alternative embodiments: Refer to Figure 1 and Figure 3 As shown, an embodiment of the present application provides a lithium battery slurry supply and cleaning system. The feed branch pipe 12 and the discharge branch pipe 13 of the transfer slurry supply unit 1 of the lithium battery slurry supply and cleaning system are both communicated with the main feed pipeline 5. A first valve 6 is provided on the main feed pipeline 5. The first valve 6 is used to connect or disconnect the feed branch pipe 12 of the transfer slurry supply unit 1 and the discharge branch pipe 13 of the transfer slurry supply unit 1.

[0048] When the first valve 6 is used to disconnect the feed branch pipe 12 of the transfer slurry supply unit 1 and the discharge branch pipe 13 of the transfer slurry supply unit 1, the slurry mixing unit 4 pumps the mixed finished slurry into the main feed pipeline 5 and then into the slurry storage tank 11 of the transfer slurry supply unit 1 for temporary storage, and pumps the slurry discharged from the transfer slurry supply unit 1 into the tail slurry supply unit 2.

[0049] In some alternative embodiments: Refer to Figure 4 As shown, an embodiment of the present application provides a lithium battery slurry supply and cleaning system. The feed branch pipe 12 of the tail slurry supply unit 2 of the lithium battery slurry supply and cleaning system is connected to the main feed pipeline 5, and the feed branch pipe 12 of the head slurry supply unit 3 is connected to the main feed pipeline 5. Second valves 18 are connected between the feed branch pipe 12 of the tail slurry supply unit 2 and the main feed pipeline 5 and between the feed branch pipe 12 of the head slurry supply unit 3 and the main feed pipeline 5. The discharge branch pipes 13 of the tail slurry supply unit 2 and the head slurry supply unit 3 are both connected with slurry coating dies.

[0050] A third valve 7 and a fourth valve 8 are provided on the main feed pipeline 5. The third valve 7 is located downstream of the feed branch pipe 12 of the tail slurry supply unit 2, and the fourth valve 8 is located downstream of the feed branch pipe 12 of the head slurry supply unit 3. The second valve 18 is used to open or close the feed branch pipe 12 of the tail slurry supply unit 2 and the feed branch pipe 12 of the head slurry supply unit 3, so that the transfer slurry supply unit 1 supplies slurry to the tail slurry supply unit 2 or the head slurry supply unit 3 respectively.

[0051] When the third valve 7 is closed and the second valve 18 for pumping the slurry into the tail slurry supply unit 2 is opened, the transfer slurry supply unit 1 pumps the slurry into the tail slurry supply unit 2. When the third valve 7 is opened and the fourth valve 8 is closed, and the second valve 18 of the head slurry supply unit 3 is opened, the transfer slurry supply unit 1 pumps the slurry into the tail slurry supply unit 2 and / or the head slurry supply unit 3.

[0052] In some alternative embodiments: Refer to Figure 4 As shown, an embodiment of the present application provides a lithium battery slurry supply and cleaning system. The inlet end of the main feed pipeline 5 of the lithium battery slurry supply and cleaning system is provided with a water inlet and a fifth valve 9. The end of the main feed pipeline 5 is connected with a ball collector 10. Rubber balls for cleaning the inner wall of the main feed pipeline are arranged in the main feed pipeline 5, and the spherical surfaces of the rubber balls are in sliding friction connection with the inner wall of the main feed pipeline.

[0053] The inner diameter of the main supply pipeline 5 is larger than that of the feed branch pipe 12 and the discharge branch pipe 13, and the diameter of the rubber ball is larger than that of the feed branch pipe 12 and the discharge branch pipe 13. The rubber ball enters the main supply pipeline 5 from the inlet end of the main supply pipeline 5. After the first valve 6, the third valve 7, the fourth valve 8 and the fifth valve 9 are opened, the rubber ball flows from the inlet end of the main supply pipeline 5 to the end, and finally falls into the ball collecting bucket 10, thereby enabling the rubber ball to clean the inner wall of the main supply pipeline 5.

[0054] Working principle

[0055] An embodiment of the present application provides a lithium battery slurry supply and cleaning system. Since the lithium battery slurry supply and cleaning system of the present application is provided with a slurry supply unit, the slurry supply unit includes a slurry storage tank 11, a feed branch pipe 12 connected to the slurry storage tank 11, a discharge branch pipe 13 connected to the slurry storage tank 11, a reflux branch pipe 14 connected between the feed branch pipe 12 and the discharge branch pipe 13, and a feed pump 16 connected to the discharge branch pipe 13; a pipeline cleaning unit, the pipeline cleaning unit includes an ultrasonic generator 22, an ultrasonic transducer 23 fixedly connected to the feed branch pipe 12 and the discharge branch pipe 13, and the ultrasonic generator 22 is connected to the ultrasonic transducer 23.

[0056] Therefore, the lithium battery slurry supply and cleaning system of the present application is connected with a reflux branch pipe 14 between the feed branch pipe 12 and the discharge branch pipe 13, and a feed pump 16 is connected to the discharge branch pipe 13. The feed branch pipe 12, the slurry storage tank 11, the discharge branch pipe 13, the reflux branch pipe 14 and the feed pump 16 are sequentially connected to form a cleaning circuit. The cleaning liquid in the slurry storage tank 11 circulates and flushes the dry slurry attached to the feed branch pipe 12, the slurry storage tank 11 and the discharge branch pipe 13 under the action of the feed pump 16.

[0057] In addition, ultrasonic transducers 23 are installed on the feed branch pipe 12 and the discharge branch pipe 13, and the ultrasonic generator 22 is connected to the ultrasonic transducers 23. The ultrasonic transducers 23 emit ultrasonic waves to clean the inner walls of the feed branch pipe 12 and the discharge branch pipe 13, and the cleaning efficiency is further improved.

[0058] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0060] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A lithium battery slurry supply and cleaning system, characterized in that: include: A slurry supply unit, the slurry supply unit comprising a slurry storage tank (11), a feed branch pipe (12) connected to the slurry storage tank (11), a discharge branch pipe (13) connected to the slurry storage tank (11), a reflux branch pipe (14) connected between the feed branch pipe (12) and the discharge branch pipe (13), and a feed pump (16) connected to the discharge branch pipe (13); A pipeline cleaning unit, the pipeline cleaning unit comprises an ultrasonic generator (22), an ultrasonic transducer (23) fixedly connected to the feed branch pipe (12) and / or the discharge branch pipe (13), and the ultrasonic generator (22) is connected to the ultrasonic transducer (23).

2. A lithium battery slurry supply and cleaning system as claimed in claim 1, characterized in that : The feed branch pipe (12) and / or the discharge branch pipe (13) are provided with a screw (24) connected to the ultrasonic transducer (23), and the ultrasonic transducer (23) is provided with a threaded hole (25) connected to the screw (24). The discharge branch pipe (13) and the return branch pipe (14) are connected via a three-way valve (15), and a demagnetization mechanism (17) is connected in series to the discharge branch pipe (13).

3. A lithium battery slurry supply and cleaning system as claimed in claim 1 or 2, characterized in that : It also includes a slurry stirring unit (4), the slurry stirring unit (4) includes a stirring tank (19), the outlet of the stirring tank (19) is connected to a feed branch pipe (20), the outlet of the feed branch pipe (20) is connected to a main feed pipeline (5), and the feed branch pipe (20) is connected in series with a diaphragm pump (21) and a demagnetization mechanism (17).

4. A lithium battery slurry supply and cleaning system as claimed in claim 3, characterized in that : The feed branch pipe (20) is provided with a screw (24) connected to the ultrasonic transducer (23), the ultrasonic transducer (23) is provided with a threaded hole (25) connected to the screw (24), and the ultrasonic transducer (23) is connected to the feed branch pipe (20) via the screw (24).

5. A lithium battery slurry supply and cleaning system as claimed in claim 3, characterized in that : A plurality of groups of slurry supply units are sequentially connected along the length direction of the main supply pipeline (5), and the plurality of groups of slurry supply units are sequentially a transfer slurry supply unit (1), a tail slurry supply unit (2) and a head slurry supply unit (3).

6. A lithium battery slurry supply and cleaning system as claimed in claim 5, characterized in that : The feed branch pipe (12) and the discharge branch pipe (13) of the transfer slurry supply unit (1) are both connected to the main supply pipeline (5), and the main supply pipeline (5) is provided with a first valve (6), and the first valve (6) is used to connect or disconnect the feed branch pipe (12) and the discharge branch pipe (13) of the transfer slurry supply unit (1).

7. A lithium battery slurry supply and cleaning system as claimed in claim 5, characterized in that : The feed branch pipe (12) of the tail slurry supply unit (2) is in communication with the main feed pipeline (5), and the feed branch pipe (12) of the head slurry supply unit (3) is in communication with the main feed pipeline (5); A second valve (18) is connected between the feed branch pipe (12) of the tail slurry supply unit (2) and the feed branch pipe (12) of the head slurry supply unit (3) and the main feed pipeline (5); The main supply pipeline (5) is provided with a third valve (7) and a fourth valve (8), wherein the third valve (7) is located downstream of the feed branch pipe (12) of the tail slurry supply unit (2), and the fourth valve (8) is located downstream of the feed branch pipe (12) of the head slurry supply unit (3).

8. A lithium battery slurry supply and cleaning system as claimed in claim 5, characterized in that : The inlet end of the main supply pipeline (5) is provided with a water inlet and a fifth valve (9), the end of the main supply pipeline (5) is connected to a ball collecting bucket (10), and a rubber ball for cleaning the inner wall of the main supply pipeline is provided in the main supply pipeline (5), and the spherical surface of the rubber ball is in sliding friction connection with the inner wall of the main supply pipeline.

9. A lithium battery slurry supply and cleaning system as claimed in claim 8, characterized in that : The inner diameter of the main supply pipeline (5) is larger than the inner diameters of the feed branch pipe (12) and the discharge branch pipe (13), and the diameter of the rubber ball is larger than the inner diameters of the feed branch pipe (12) and the discharge branch pipe (13).

10. A lithium battery slurry supply and cleaning system as claimed in claim 5, characterized in that : The discharge branch pipes (13) of the tail slurry supply unit (2) and the head slurry supply unit (3) are both connected to a slurry coating die head.

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