Coating gasket for improving leakage of ceramic edge coating slurry or mixing of ceramic edge coating slurry and coating slurry

Abstract

The utility model discloses a coating gasket for improving leakage of ceramic edge coating slurry or mixing of the ceramic edge coating slurry, and relates to the technical field of coating gaskets, the coating gasket comprises a body, a T block is arranged above the body, a plurality of screw holes are formed in the body, the body comprises a cavity, the body is provided with side edge sections on two sides of the cavity, and the T block and the screw holes are arranged in the cavity. A screw hole is formed in the side edge section, a feeding hole is formed in the side edge section, the feeding hole is located in one side of the screw hole, the feeding hole is communicated with a flow channel, the flow channel is adjacent to the cavity, and the feeding hole is located in the end of the side edge section; according to the utility model, the ceramic edge coating feeding hole is reset, so that the length of the ceramic edge coating runner is shortened, and the pressure of ceramic edge coating slurry in the runner is reduced; meanwhile, the feeding hole and the screw socket are separately arranged, and the supporting block is introduced, so that the die head and the gasket can be tightly attached, the overflow risk of the ceramic edge coating slurry in the runner is reduced, and the problem of leakage of the ceramic edge coating slurry in the lithium battery coating process or mixing of the ceramic edge coating slurry and the coating slurry is effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of coating gaskets, and in particular to a coating gasket that improves the leakage of ceramic edge coating slurry or the mixing of the coating slurry with the ceramic edge coating slurry. Background Technology

[0002] Because the coating of the positive electrode of a lithium-ion battery involves a ceramic edge coating layer, the design of the gasket scheme will specifically reserve ceramic edge coating inlet holes and flow channels. In single-width coating, the screw holes on both sides of the body are often used as ceramic edge coating inlet holes, such as... Figure 1 As shown, this design scheme results in an excessively long ceramic edge coating channel. Especially in single-width narrow-width coating, the longer ceramic edge coating channel increases the pressure of the ceramic edge coating feed and within the channel. In addition, the ceramic edge coating feed hole occupies the screw holes on both sides, causing the body to not be locked tightly on both sides, which in turn leads to leakage of ceramic edge coating slurry or mixing with the coating slurry.

[0003] In multi-coating processes, such as double-coating, to achieve two ceramic edge coatings in the middle blank area, the screw hole at the tail of the body is often used as the ceramic edge coating feed hole. Figure 2 As shown, this design scheme lacks screws to lock the ceramic edge coating feed hole, preventing the gasket from fitting tightly against the upper die head surface. Consequently, the ceramic edge coating slurry overflows from the flow channel, causing leakage / mixing. To compensate for the coating difficulties caused by this leakage / mixing, a pressure strip is often installed by drilling holes in the upper body surface to fix the gasket, ensuring a tight fit between the gasket and the upper die head surface and preventing leakage / mixing. However, after installing the pressure strip, it is pressed into the cavity by 1 / 3, creating a "tangible baffle" inside the cavity. This alters the flow field distribution of the slurry after it enters the cavity, affecting the consistency of the coating surface density. Utility Model Content

[0004] Purpose of the invention: The purpose of this utility model is to provide a coating gasket that improves the leakage or mixing of ceramic edge coating slurry with coating slurry, so as to solve the problem of leakage or mixing of ceramic edge coating slurry with coating slurry caused by excessively long flow channels or gasket deformation that prevents it from fitting the die head during coating.

[0005] Technical solution:

[0006] A coating pad for improving ceramic edge coating slurry leakage or mixing with coating slurry includes a body, a T-shaped block on the top of the body, a plurality of screw holes on the body, a cavity in the body, and side sections on both sides of the cavity. A feed hole is provided on each side section, located on one side of the screw holes and adjacent to the cavity, at the end of the side section.

[0007] Furthermore, the body also includes an intermediate section at the center of the cavity, the intermediate section being provided with the feed hole, and the feed hole being connected to the flow channel.

[0008] Furthermore, each of the flow channel and the feed hole is provided in a pair, and the flow channel and the feed hole are symmetrically arranged.

[0009] Furthermore, the flow channel is also connected to a secondary flow channel.

[0010] Furthermore, the secondary flow channels are inclined, the two secondary flow channels are mirror-symmetrical, and the combination of the secondary flow channels on both sides forms a "figure-eight" shape.

[0011] Furthermore, the secondary flow channel is L-shaped.

[0012] Furthermore, the coating pad also includes a support block located below the body, the support block being used to support the intermediate section.

[0013] Furthermore, a material injection port is provided below the support block, and the material injection port is connected to a connecting port that penetrates through both sides of the support block. Both the material injection port and the connecting port penetrate downwards.

[0014] Beneficial effects: The redesigned ceramic edge coating feed hole shortens the ceramic edge coating channel length and reduces the pressure of the ceramic edge coating slurry within the channel. Simultaneously, the separate placement of the feed inlet and screw port, along with the introduction of a support block, ensures a tight fit between the die head and the gasket, reducing the risk of ceramic edge coating slurry overflow within the channel. This effectively solves the problems of ceramic edge coating slurry leakage or mixing with the coating slurry in the lithium battery coating process. For single-width coating, the interfacial width is reduced from 1.5mm to virtually no interfaciality; for double-width coating, the interfacial width is reduced from a severe 50mm to less than 0.5mm, ensuring a clear boundary between the electrode coating slurry and the ceramic slurry after coating and drying. Furthermore, the gasket has a wide range of slurry adaptability, greatly reducing the difficulty of debugging for employees and significantly improving the process yield and product quality of the coating process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure described in the background section;

[0016] Figure 2 This is a schematic diagram of the structure described in the background section;

[0017] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the dual-coating structure of this utility model;

[0019] Figure 5This is a schematic diagram of another embodiment of the dual-coating structure of this utility model;

[0020] Figure 6 This is a top view of the support block structure of this utility model;

[0021] Figure 7 This is a bottom view of the support block structure of this utility model;

[0022] Figure 8 for Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 9 This is a schematic diagram of another embodiment of the support block of this utility model.

[0024] Reference numerals: 11. Gasket body; 12. Feed hole; 13. Flow channel; 132. Secondary flow channel; 14. Cavity; 15. Screw hole; 16. Middle section; 17. Side section; 21. T-block; 31. Support block; 32. Feed port; 33. Connection port. Detailed Implementation

[0025] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] like Figures 3 to 9 As shown, a coating pad for improving the leakage or mixing of ceramic edge coating slurry includes a body 11, a T-block 21, and a support block 31.

[0028] The body 11 includes a single-width coated pad and a double-width coated pad. The body 11 includes a horizontal portion and two side segments 17 on both sides. The horizontal portion is located only on one side of the two side segments 17. The horizontal portion and the side segments 17 form a cavity 14. One side of the cavity 14 has an opening.

[0029] The body 11 is provided with a plurality of screw holes 15, which are arranged in an array on the body 11, including the side section 17 and the horizontal part, wherein the screw holes 15 are used to fix the mold head and the body 11.

[0030] like Figure 3 As shown, in the single-coated main body 11, there are no partitions within the cavity 14, as... Figure 4 As shown, the main body 11 with double coating includes a middle section 16, which is located at the center of the cavity 14. The middle section 16 and the side section 17 are arranged parallel to each other.

[0031] In single-width coating, a feed hole 12 is provided on the side section 17, and a flow channel 13 is connected to the feed hole 12. The flow channel 13 is adjacent to the middle cavity 14. The feed hole 12 and the screw hole 15 are set separately. The T-block 21 is located on the upper side of the body 11. The T-block 21 is close to the end of the side section 17. The feed hole 12 and the flow channel 13 are both close to the end of the side section 17. The feed hole 12 is relatively close to the T-block (here the T-block is outside the coating film area and does not affect the surface density adjustment). This can effectively shorten the length of the ceramic edge coating flow channel, reduce the pressure of the ceramic edge coating slurry in the flow channel, and at the same time, it does not occupy the screw holes on both sides, ensuring that the two sides of the body are locked. This ensures that the ceramic edge coating slurry does not leak on both sides of the body and that the ceramic edge coating slurry does not overflow the flow channel and mix with the coating slurry.

[0032] In the double-coating process, both the side section 17 and the middle section 16 are provided with feed holes 12 and flow channels 13. The flow channels 13 and the feed holes 12 are connected. The middle section 16 has a pair of feed holes 12 and flow channels 13, which are located on both sides of the middle section 16. The feed holes 12 are close to the screw holes 15, and the feed holes 12 and screw holes 15 are spaced apart.

[0033] A secondary flow channel 132 is also provided between the flow channel 13 and the feed hole 12. The secondary flow channel 132 is used to connect the feed hole 12 and the flow channel 13. The secondary flow channel 132 is inclined and the two secondary flow channels 132 are mirror symmetrical and form a "figure-eight" shape.

[0034] like Figure 5 As shown, in another embodiment, the secondary flow channel 132 is "L-shaped". The secondary flow channel 132 is provided on the body 11. One end of the secondary flow channel 132 is connected to the flow channel 13, and the other end of the secondary flow channel 132 is connected to the feed hole 12. Since the area of ​​the "L-shaped" secondary flow channel 132 is not suspended above the cavity and is located in the screw hole locking area at the tail of the body 11, the screw locking force can be used to make it fit tightly against the surface of the upper mold head. The "L-shaped" secondary flow channel 132 is milled through from top to bottom, which is beneficial to adjust and optimize the speed and pressure distribution of the ceramic edge coating slurry.

[0035] like Figure 6 and Figure 7 As shown, the lower part of the body 11 is a cavity. Due to the good toughness of the body, the body 11 is easily deformed, which makes it impossible for the body 11 to fit tightly with the upper mold head, causing the ceramic edge coating slurry to leak or mix with the coating slurry. Furthermore, it also includes a support block 31, which is located below the middle section 16. The length of the support block 31 is the same as the length of the middle section 16. The support block 31 supports the middle section 16. At the same time, since the middle section 16 is provided with an inclined secondary flow channel 132, the support block 31 cooperates with the inclined secondary flow channel 132. The end of the support block 31 has protrusions on both sides to cooperate with the irregular part of the middle section 16, thereby ensuring the support work.

[0036] The upper surface of the support block 31 is horizontal, and the support block 31 abuts against the lower part of the body 11. The lower surface of the support block 31 is curved, which facilitates the fitting of the support block 31 with the cavity.

[0037] The support block 31 has an injection port 32 on its front side. The support block 31 also has a connecting port 33 that penetrates the side wall. The connecting port 33 penetrates both side walls, which facilitates the connection with the cavity below, ensuring that the slurry can flow normally in the cavity without affecting the slurry flow field distribution. Therefore, it has no effect on the coating surface density.

[0038] In this application, the secondary flow channel 132 has another "L-shape", in which case the support block 31 is as follows: Figure 9 As shown, without the triangular portions on both sides, the support block 31 can provide good support for the middle section 16.

[0039] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An improved ceramic edge coating paste leakage or mixing coating pad, comprising a body (11), the body (11) is provided with a T fast (21), the body (11) is provided with a plurality of screw holes (15), the body (11) comprises a cavity (14), the body (11) is provided with a side edge segment (17) on both sides of the cavity (14), characterized in that: The side section (17) is provided with a feeding hole (12) which is located at one side of the screw hole (15) and connected with a flow channel (13) which is adjacent to the cavity (14), and the feeding hole (12) is located at the end of the side section (17). ​ 2. The coating shim of claim 1, wherein: The body (11) further comprises a middle section (16) in the center of the cavity (14), and the middle section (16) is provided with the feeding hole (12) which is connected with the flow channel (13).

3. The coating shim of claim 2, wherein: The flow channel (13) and the feeding hole (12) are both provided with a pair of symmetrical flow channels (13) and feeding holes (12).

4. The coating shim of claim 3, wherein: The flow channel (13) is further connected with a sub-flow channel (132).

5. The coating shim of claim 4, wherein: The sub-flow channel (132) is obliquely arranged, and two sub-flow channels (132) are mirror-symmetric, and two sub-flow channels (132) are combined in the shape of "splayed".

6. The coating shim of claim 4, wherein: The sub-flow channel (132) is "L-shaped".

7. The coating shim of claim 5 or 6, wherein: The coating gasket further comprises a supporting block (31) which is located below the body (11) and used for supporting the middle section (16).

8. The coating shim of claim 7, wherein: The lower part of the supporting block (31) is provided with an injection port (32) which is communicated with a connection port (33) penetrating through both sides of the supporting block (31), and the injection port (32) and the connection port (33) both penetrate downward.

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