Parallel coating and filtering system capable of realizing online automatic switching

Abstract

The utility model discloses a parallel coating filtering system capable of automatically switching on line, which comprises a feeding trolley buffer tank, the feeding trolley buffer tank is externally connected with a screw pump, the screw pump is connected to a first branch and a second branch, and the first branch and the second branch are both connected to a coating die head; the feeding trolley buffer tank is externally connected with a diaphragm pump, the diaphragm pump is externally connected with a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve is connected to a first branch, and the second electromagnetic valve is connected to a second branch; the feeding trolley buffer tank is further externally connected with a third electromagnetic valve, and the third electromagnetic valve is connected to the second branch. The device is simple in structure, can realize on-line automatic switching of the coating and filtering system without shutdown, improves the efficiency of replacing and cleaning the filtering system, reduces adjustment scrapping, and improves the consistency of all control key points in continuous production.

Description

Technical Field

[0001] The utility model relates to the technical field of parallel coating and filtering, in particular to a parallel coating and filtering system capable of online automatic switching. Background Art

[0002] In the lithium-ion battery manufacturing process, coating is a key step in uniformly applying the positive or negative electrode slurry to a metal current collector (such as aluminum foil or copper foil). Due to fluctuations in the particle size and specific surface area of the raw materials, the slurry mixing process can lead to incomplete dispersion and the formation of soft agglomerated particles. Under the pressure of the screw pump, most of the soft agglomerated particles are intercepted in the filtration system. If the filter is clogged, the filtration effect is lost, and the pressure will rise sharply, resulting in large fluctuations in surface density and size. Due to the large number of soft agglomerated particles, the filtration system at the coating end is severely clogged, and the filtration system needs to be replaced frequently, up to once per shift. In actual production, the filtration system is disassembled, cleaned, and replaced by monitoring the coating pressure and surface density. After cleaning, the coating surface density and size are installed and debugged. The cleaning and replacement process is slow and inefficient, and there are many bubbles, which increases the number of machine adjustments.

[0003] The traditional filtration system has only a single line and can only be replaced by stopping the machine, and circulating to expel bubbles and dry materials. The filtration system can only be disassembled and cleaned as a whole to replace it, resulting in loss of production capacity, slurry, and foil. It cannot be replaced online automatically through traditional replacement methods. In addition, the replacement operation of the traditional filtration system is long and inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to provide an online automatically switchable parallel coating and filtration system to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions: an online automatically switchable parallel coating and filtration system, comprising a feeding trolley buffer tank, the feeding trolley buffer tank being externally connected to a screw pump, the screw pump being connected to a first branch and a second branch, both of which are connected to a coating die head;

[0005] The loading trolley buffer tank is externally connected to a diaphragm pump, and the diaphragm pump is externally connected to a first solenoid valve and a second solenoid valve, the first solenoid valve is connected to the first branch, and the second solenoid valve is connected to the second branch;

[0006] The buffer tank of the loading trolley is also externally connected to a third solenoid valve, and the third solenoid valve is connected to the second branch.

[0007] Preferably, the first branch is provided with a first branch solenoid valve, a first pressure sensor, a first metal filter, a first PP filter, and a third branch solenoid valve in sequence.

[0008] Preferably, the second branch is provided with a second branch solenoid valve, a second pressure sensor, a second metal filter, a second PP filter, and a fourth branch solenoid valve in sequence.

[0009] Preferably, the connection point between the first solenoid valve and the first branch is located between the first branch solenoid valve and the first pressure sensor.

[0010] Preferably, the connection point between the second solenoid valve and the second branch is located between the second branch solenoid valve and the second pressure sensor.

[0011] Preferably, the connection point between the third solenoid valve and the second branch is located between the second PP filter and the fourth branch solenoid valve.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the present invention is novel in design, and a branch similar to the original filtration system is designed in parallel. Pressure sensors are installed in each pre-filter and post-filter pipe, and solenoid valves are used for each valve in parallel. The data from the pressure sensor is transmitted to the coating PLC control system for calculation, and feedback is used to switch the branch filtration system valve. The coating filtration system can be automatically switched online without shutting down, which improves the efficiency of replacing and cleaning the filtration system, reduces adjustment and scrapping, and improves the consistency of various control key points in continuous production; a diaphragm pump exhaust circulation system is added, which can circulate the branch exhaust online, and exhaust and circulate the filtration system in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] In the figure, there are a loading trolley buffer tank 1, a first branch 11, a second branch 12, a screw pump 2, a diaphragm pump 3, a first solenoid valve 41, a second solenoid valve 42, a first branch solenoid valve 43, a second branch solenoid valve 44, a third branch solenoid valve 45, a fourth branch solenoid valve 46, a third solenoid valve 47, a first metal filter 51, a second metal filter 52, a first PP filter 61, a second PP filter 62, a first pressure sensor 71, a second pressure sensor 72, and a coating die head 8. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1The utility model provides a technical solution: a parallel coating and filtering system that can be automatically switched online, including a feeding trolley buffer tank 1, the feeding trolley buffer tank 1 is externally connected to a screw pump 2, the screw pump 2 is connected to a first branch 11 and a second branch 12, the first branch 11 is sequentially provided with a first branch solenoid valve 43, a first pressure sensor 71, a first metal filter 51, a first pp filter 61, and a third branch solenoid valve 45, the second branch 12 is sequentially provided with a second branch solenoid valve 44, a second pressure sensor 72, a second metal filter 52, a second pp filter 62, and a fourth branch solenoid valve 46, the first branch 11 and the second branch 12 are both connected to a coating die head 8.

[0017] The first metal filter 51 and the second metal filter 52 are primary filtration, and the first PP filter 61 and the second PP filter 62 are secondary filtration, which can combine the advantages of metal filtration and PP filtration to ensure the filtration effect of the filtration system.

[0018] The loading trolley buffer tank 1 is externally connected to a diaphragm pump 3, and the diaphragm pump 3 is externally connected to a first solenoid valve 41 and a second solenoid valve 42. The first solenoid valve 41 is connected to the first branch 11, and the connection point is located between the first branch solenoid valve 43 and the first pressure sensor 71; the second solenoid valve 42 is connected to the second branch 12, and the connection point is located between the second branch solenoid valve 44 and the second pressure sensor 72.

[0019] The loading trolley buffer tank 1 is also externally connected to a third solenoid valve 47 , which is connected to the second branch 12 , and the connection point is located between the second pp filter 62 and the fourth branch solenoid valve 46 .

[0020] The filtration system is automatically controlled by a PLC control system. During normal production, the first branch solenoid valve 43 and the third branch solenoid valve 45 are opened to achieve normal filtration of the coating slurry through the first branch 11. When the first branch 11 is blocked, the PLC controls the diaphragm pump 3, the second solenoid valve 42, and the third solenoid valve 47 to open, so that the second branch 12 can be refluxed and circulated in advance to discharge the air, impurities, etc. in the second branch 12. If these impurities and bubbles exist during the filtration process, they may clog the pores of the filter medium and reduce the filtration speed and effect. By circulating in advance, they can be effectively removed, creating good conditions for subsequent high-efficiency filtration. At this time, the first branch solenoid valve 43 and the second branch solenoid valve 44 are in a closed state.

[0021] When the pressure sensor senses a pressure value of 6-7 bar, the coating PLC automatically opens the second branch solenoid valve 44 and the fourth branch solenoid valve 46 on the second branch 12, and closes the first branch solenoid valve 43 and the third branch solenoid valve 45 to achieve branch switching.

[0022] After the branch is switched, the first branch 11 is disassembled and cleaned, and then installed and ready for the next online switching. This process improves the efficiency of replacing and cleaning the filter system, reduces adjustment scrapping, and improves the consistency of each key control point in continuous production.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parallel coating and filtration system capable of online automatic switching, characterized by: The invention comprises a feeding trolley buffer tank (1), wherein the feeding trolley buffer tank (1) is externally connected to a screw pump (2), wherein the screw pump (2) is connected to a first branch (11) and a second branch (12), and both the first branch (11) and the second branch (12) are connected to a coating die head (8); The loading trolley buffer tank (1) is externally connected to a diaphragm pump (3), and the diaphragm pump (3) is externally connected to a first solenoid valve (41) and a second solenoid valve (42), the first solenoid valve (41) is connected to the first branch (11), and the second solenoid valve (42) is connected to the second branch (12); The loading trolley buffer tank (1) is also externally connected to a third solenoid valve (47), and the third solenoid valve (47) is connected to the second branch (12).

2. The online automatically switchable parallel coating and filtration system according to claim 1, characterized in that: The first branch (11) is provided with a first branch solenoid valve (43), a first pressure sensor (71), a first metal filter (51), a first PP filter (61), and a third branch solenoid valve (45) in sequence.

3. The online automatically switchable parallel coating and filtration system according to claim 2, characterized in that: The second branch (12) is provided with a second branch solenoid valve (44), a second pressure sensor (72), a second metal filter (52), a second PP filter (62), and a fourth branch solenoid valve (46) in sequence.

4. The online automatically switchable parallel coating and filtration system according to claim 3 is characterized in that: The connection point between the first solenoid valve (41) and the first branch (11) is located between the first branch solenoid valve (43) and the first pressure sensor (71).

5. The online automatically switchable parallel coating and filtration system according to claim 4, characterized in that: The connection point between the second solenoid valve (42) and the second branch (12) is located between the second branch solenoid valve (44) and the second pressure sensor (72).

6. The online automatically switchable parallel coating and filtration system according to claim 5, characterized in that: The connection point between the third solenoid valve (47) and the second branch (12) is located between the second PP filter (62) and the fourth branch solenoid valve (46).

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