Equipment and coating machine for filtering and defoaming coating slurry

Abstract

The utility model belongs to the technical field of battery production, and in particular relates to a device and a coating machine for filtering and defoaming coating slurry, comprising: a filtering mechanism, comprising a shell, a filter element, a filter feed pipe and a filter discharge pipe, the filter element, the filter feed pipe and the filter discharge pipe are arranged on the shell and connected in sequence; a defoaming mechanism, a storage tank, a dispersion screen plate and a driving member, the storage tank comprises a defoaming feed port, a defoaming discharge port and an air suction hole, the dispersion screen plate is arranged in the storage tank and is connected to the driving end of the driving member, and the driving member is arranged on the storage tank for driving the dispersion screen plate to rotate; the defoaming feed port is connected to the filter discharge pipe; the beneficial effect of the utility model is that the filtering mechanism filters the slurry prepared by stirring, screens out agglomerates or particles in the slurry, and then eliminates the bubbles in the slurry through the dispersion screen plate of the defoaming mechanism, so as to prevent uneven coating and bubble leakage caused by particles or bubbles in the slurry during coating operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a device and a coating machine for filtering and defoaming coating slurry. Background Art

[0002] In the battery production process, the battery electrodes need to be coated. After the coating slurry is stirred and produced, it will be transported to the coating cart for coating. During the transportation of the slurry, it will pass through a diaphragm pump and a screw pump. The pulses generated during the transportation of the slurry by the pump and the filling degree and sealing effect of the pipeline will affect the generation of agglomerates and bubbles in the slurry.

[0003] Due to the presence of agglomerates and bubbles in the coating slurry, the surface slurry coating of the electrode will be uneven during the coating operation, affecting the production quality of the electrode and may even cause the material to be scrapped; and the presence of bubbles in the coating slurry can easily cause bubble leakage on the electrode membrane surface. After the electrode is made into a battery, the effective area for embedding lithium ions will be reduced, which can easily cause lithium precipitation problems.

[0004] Therefore, eliminating the agglomerates and bubbles generated during the transportation of the slurry, reducing scrap, and lowering or eliminating the lithium plating problem caused by bubble leakage are issues that need to be urgently addressed in the coating process. Utility Model Content

[0005] The purpose of the utility model is to provide a device and a coating machine for filtering and defoaming coating slurry in order to solve the above-mentioned technical problems.

[0006] In view of this, the utility model provides a device for filtering and defoaming coating slurry, comprising:

[0007] A filter mechanism, the filter mechanism comprising a housing, a filter element, a filter feed pipe and a filter discharge pipe, the filter element, the filter feed pipe and the filter discharge pipe are arranged on the housing and connected in sequence;

[0008] A defoaming mechanism, wherein the defoaming mechanism comprises a material storage tank, a dispersion sieve plate and a driving member, wherein the material storage tank comprises a defoaming feed port, a defoaming discharge port and an air extraction hole, wherein the dispersion sieve plate is arranged in the material storage tank and connected to the driving end of the driving member, and the driving member is arranged on the material storage tank and is used to drive the dispersion sieve plate to rotate;

[0009] Wherein, the defoaming feed port is connected with the filtering discharge pipe.

[0010] Furthermore, the filter element comprises:

[0011] A filter chamber, wherein the filter feed pipe is in communication with the filter chamber;

[0012] A collecting chamber, wherein the filter discharge pipe is in communication with the collecting chamber;

[0013] A plurality of filter elements are arranged in the filter chamber, and the filter chamber and the collection chamber are connected through the plurality of filter elements.

[0014] Furthermore, the filter element comprises:

[0015] A support member, wherein the support member is arranged in the filter chamber and is provided with a flow channel for the slurry to flow;

[0016] A filter cloth, wherein the filter cloth is wound on a support member;

[0017] Wherein, the filtering chamber and the collecting chamber are connected through the flow channel.

[0018] Furthermore, the filter element also includes:

[0019] The exhaust port is arranged above the filter chamber and is used to discharge the gas in the filter chamber.

[0020] Furthermore, the storage tank also includes:

[0021] A spray pipe hole is connected to a device for cleaning the storage tank.

[0022] Furthermore, the defoaming mechanism also includes:

[0023] A stirring paddle is arranged in the storage tank and connected to the driving end of the driving member.

[0024] Furthermore, the stirring paddle is an anchor type stirring paddle.

[0025] Furthermore, the dispersion sieve plate is a funnel-shaped structure.

[0026] Furthermore, the defoaming mechanism also includes:

[0027] A discharge pipe, the discharge pipe is connected to the defoaming discharge port;

[0028] A discharge valve is arranged on the discharge pipe and is used to control the opening and closing of the discharge pipe.

[0029] A coating machine comprises any of the above-mentioned devices for filtering and defoaming coating slurry.

[0030] The beneficial effects of the utility model are:

[0031] First, use the filter element of the filtering mechanism to filter the stirred slurry to screen out the agglomerates or particles in the slurry, and then use the dispersed screen plate of the defoaming mechanism to eliminate the bubbles in the slurry to prevent uneven coating and bubble leakage due to the presence of particles or bubbles in the slurry during the coating operation, thereby avoiding the scrapping of materials or the problem of lithium precipitation after the subsequent electrodes are made into batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0033] Figure 2 It is a structural schematic diagram of the filtering mechanism in the utility model;

[0034] Figure 3 It is a structural schematic diagram of the defoaming mechanism in the utility model;

[0035] The symbols in the figure are:

[0036] 1. Shell; 2. Filter element; 21. Filter chamber; 22. Collection chamber; 23. Support; 24. Filter cloth; 25. Exhaust port; 3. Filter feed pipe; 4. Filter discharge pipe; 5. Storage tank; 51. Air extraction hole; 52. Spray pipe hole; 6. Dispersion sieve plate; 7. Agitator paddle; 8. Discharge pipe. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] Embodiment 1:

[0040] This embodiment provides a device for filtering and defoaming a coating slurry, comprising:

[0041] A filter mechanism, the filter mechanism comprising a housing 1, a filter element 2, a filter feed pipe 3 and a filter discharge pipe 4, wherein the filter element 2, the filter feed pipe 3 and the filter discharge pipe 4 are arranged on the housing 1 and are connected in sequence;

[0042] A defoaming mechanism, the defoaming mechanism comprises a storage tank 5, a dispersion sieve plate 6 and a driving member, the storage tank 5 comprises a defoaming feed port, a defoaming discharge port and an air extraction hole 51, the dispersion sieve plate 6 is arranged in the storage tank 5 and connected to the driving end of the driving member, and the driving member is arranged on the storage tank 5 to drive the dispersion sieve plate 6 to rotate;

[0043] Wherein, the defoaming feed port is connected with the filtering discharge pipe 4.

[0044] In the present technical solution, after the slurry is produced from the stirring slurry storage tank, it enters the filter element 2 in the shell 1 through the filter feed pipe 3. After the particles or agglomerates present in the slurry are filtered out by the filter element 2, the slurry is discharged from the filter discharge pipe 4, and then enters the storage tank 5 through the defoaming feed port.

[0045] The suction hole 51 of the storage tank 5 is connected to the external negative pressure mechanism. When the slurry enters the storage tank 5, the driving member (not shown in the drawings of the specification) controls the rotation of the dispersion screen 6. The driving member can be a high-speed dispersion motor, which drives the dispersion screen 6 to rotate at a high speed, so that the slurry forms a liquid cloth after entering the high-speed rotating dispersion screen 6. At the same time, the negative pressure mechanism evacuates the storage tank 5 through the suction hole 51 to remove the bubbles wrapped on the surface of the slurry particles, thereby achieving the purpose of defoaming.

[0046] To summarize, the slurry prepared by stirring is first filtered by the filter element 2 of the filtering mechanism to screen out the agglomerates or particles in the slurry, and then the bubbles in the slurry are eliminated by the dispersion screen plate 6 of the defoaming mechanism to prevent uneven coating and bubble leakage due to the particles or bubbles in the slurry during the coating operation, thereby avoiding the scrapping of materials or the problem of lithium precipitation after the subsequent electrodes are made into batteries.

[0047] Embodiment 2:

[0048] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] Furthermore, the filter element 2 comprises:

[0050] A filter chamber 21, wherein the filter feed pipe 3 is in communication with the filter chamber 21;

[0051] The collecting chamber 22, the filter discharge pipe 4 is in communication with the collecting chamber 22;

[0052] A plurality of filter elements are provided in the filter chamber 21, and the filter chamber 21 and the collection chamber 22 are connected through the plurality of filter elements.

[0053] Furthermore, the filter element comprises:

[0054] A support member 23, wherein the support member 23 is disposed in the filter chamber 21 and has a flow channel for the slurry to flow;

[0055] A filter cloth 24, wherein the filter cloth 24 is wound on the support member 23;

[0056] The filtering chamber 21 and the collecting chamber 22 are connected via the flow channel.

[0057] In the present technical solution, the slurry enters the filter chamber 21 through the filter feed pipe 3 to fill the filter chamber 21. After the filter chamber 21 is filled with the slurry, the slurry is squeezed and flows through the filter cloth 24. After being filtered by the filter cloth 24, the slurry flows into the flow channel on the support 23. The slurry flows into the collection chamber 22 through the flow channel, and finally flows out of the collection chamber 22 through the filter discharge pipe 4, and then enters the storage tank 5 of the defoaming mechanism for defoaming treatment. Through this structural design, the particles and agglomerates in the slurry are effectively screened out, avoiding the presence of particles and agglomerates in the slurry during subsequent coating operations to affect the coating effect, and the practicability is high.

[0058] Embodiment 3:

[0059] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] Furthermore, the filter element 2 also includes:

[0061] The exhaust port 25 is disposed above the filter chamber 21 and is used to exhaust the gas in the filter chamber 21 .

[0062] In the present technical solution, an exhaust port 25 is provided above the filter chamber 21. When the slurry flows into the filter chamber 21 for the first time, the air in the filter chamber 21 is squeezed by the slurry and discharged through the exhaust port 25. When the slurry is observed at the exhaust port 25, it means that the slurry has filled the filter chamber 21. Then, a screw is provided at the exhaust port 25 to seal the exhaust port 25 to prevent the slurry from overflowing. Through this structural design, the air in the filter chamber 21 is discharged through the exhaust port 25, reducing the amount of bubbles when the slurry flows into the storage tank 5, thereby reducing the time spent on defoaming, improving the defoaming efficiency, and effectively improving the coating production efficiency.

[0063] Embodiment 4:

[0064] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] Furthermore, the storage tank 5 also includes:

[0066] A spray pipe hole 52 is connected to a device for cleaning the material storage tank 5 .

[0067] In the present technical solution, a spray pipe hole 52 is provided, and the spray pipe hole 52 is connected to an external cleaning device. After the coating operation is completed, the cleaning device is turned on to perform a spray cleaning treatment on the storage tank 5, thereby removing the residual slurry in the storage tank 5, and avoiding the residual slurry from mixing with the subsequently added slurry, causing the subsequently added slurry to be contaminated, resulting in a decrease in the slurry quality, affecting the subsequent battery manufacturing quality and performance.

[0068] Embodiment 5:

[0069] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0070] Furthermore, the defoaming mechanism also includes:

[0071] The stirring paddle 7 is disposed in the storage tank 5 and connected to the driving end of the driving member.

[0072] In the present technical solution, the driving member controls the high-speed rotation of the dispersion screen plate 6 and also controls the high-speed rotation of the stirring paddle 7. The stirring paddle 7 is used to stir the slurry, which can prevent the slurry in the storage tank 5 from settling when it is not used up in time, thereby ensuring the stability of the composition and performance of the battery slurry.

[0073] Furthermore, the stirring paddle 7 is an anchor stirring paddle. The stirring paddle 7 adopts an anchor stirring paddle, which has a large stirring power and stirring efficiency, and can effectively stir liquids or slurries with high viscosity, high concentration or high viscosity; and the anchor stirring paddle is usually designed to be large in size, suitable for stirring large-capacity tanks, tanks or reactors, and can effectively stir the slurry in the entire storage tank 5 to ensure the uniformity and stability of the slurry.

[0074] Embodiment 6:

[0075] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] Furthermore, the dispersion sieve plate 6 is a funnel-shaped structure.

[0077] In the present technical solution, when the dispersion screen disc 6 rotates at high speed, the slurry can be evenly distributed on the surface of the dispersion screen disc 6 to form a liquid cloth. Through this structural design, the liquid cloth formed by high-speed dispersion will not be sucked out by the negative pressure mechanism, and the practicality is high.

[0078] Embodiment 7:

[0079] This embodiment provides a device for filtering and defoaming coating slurry, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0080] Furthermore, the defoaming mechanism also includes:

[0081] A discharge pipe 8, wherein the discharge pipe 8 is connected to the defoaming discharge port;

[0082] The discharge valve is arranged on the discharge pipe 8 and is used to control the opening and closing of the discharge pipe 8.

[0083] In the present technical solution, one end of the discharge pipe 8 is connected to the defoaming outlet of the storage tank 5, and the other end is connected to the die head of the coating machine. A discharge valve (not shown in the drawings of the specification) is arranged on the discharge pipe 8 to control the discharge of the storage tank 5 according to the needs of the coating operation. The discharge valve can be a solenoid valve or a manual valve, which is set according to actual needs.

[0084] Embodiment 8:

[0085] This embodiment provides a coating machine, including the technical solution described in any one of the above embodiments 1-7.

[0086] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A device for filtering and defoaming coating slurry, characterized in that: include: A filter mechanism, the filter mechanism comprising a housing (1), a filter element (2), a filter feed pipe (3) and a filter discharge pipe (4), the filter element (2), the filter feed pipe (3) and the filter discharge pipe (4) being arranged on the housing (1) and connected in sequence; A defoaming mechanism, the defoaming mechanism comprising a material storage tank (5), a dispersion sieve plate (6) and a driving member, the material storage tank (5) comprising a defoaming feed port, a defoaming discharge port and an air extraction hole (51), the dispersion sieve plate (6) being arranged in the material storage tank (5) and connected to a driving end of the driving member, the driving member being arranged on the material storage tank (5) and used for driving the dispersion sieve plate (6) to rotate; Wherein, the defoaming feed port is connected to the filtering discharge pipe (4).

2. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The filter element (2) comprises: A filter chamber (21), wherein the filter feed pipe (3) is in communication with the filter chamber (21); A collecting chamber (22), wherein the filter discharge pipe (4) is in communication with the collecting chamber (22); A plurality of filter elements are provided in the filter chamber (21), and the filter chamber (21) and the collection chamber (22) are connected via the plurality of filter elements.

3. The device for filtering and defoaming coating slurry according to claim 2, characterized in that: The filter element comprises: A support member (23), wherein the support member (23) is disposed in the filter chamber (21), and a flow channel for slurry to flow is provided on the support member (23); A filter cloth (24), wherein the filter cloth (24) is wound on the support member (23); Wherein, the filtering chamber (21) and the collecting chamber (22) are connected via the flow channel.

4. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The filter element (2) further comprises: An exhaust port (25) is disposed above the filter chamber (21) and is used to exhaust the gas in the filter chamber (21).

5. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The storage tank (5) further comprises: A spray pipe hole (52), wherein the spray pipe hole (52) is connected to a device for cleaning the storage tank (5).

6. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The defoaming mechanism also includes: A stirring paddle (7), wherein the stirring paddle (7) is arranged in the material storage tank (5) and connected to the driving end of the driving member.

7. The device for filtering and defoaming coating slurry according to claim 6, characterized in that: The stirring paddle (7) is an anchor type stirring paddle.

8. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The dispersion sieve plate (6) is a funnel-shaped structure.

9. The device for filtering and defoaming coating slurry according to claim 1, characterized in that: The defoaming mechanism also includes: A discharge pipe (8), wherein the discharge pipe (8) is connected to the defoaming discharge port; A discharge valve is arranged on the discharge pipe (8) and is used to control the opening and closing of the discharge pipe (8).

10. A coating machine, characterized in that: The invention comprises the equipment for filtering and defoaming coating slurry as described in any one of claims 1 to 9.

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