Coating gasket and coating device

Abstract

The utility model discloses a coating gasket and a coating device. The coating gasket comprises a main plate, wherein a ceramic material outlet is formed in the main plate; the number of the side plates is two, the two side plates are arranged at the two ends of the main plate in the length direction of the main plate in a separated mode, a slurry channel is formed between the two side plates, ceramic runners and mounting holes are formed in the side plates, the mounting holes are formed in the sides, away from the slurry channel, of the side plates and used for being connected with a die head, and the ceramic runners are arranged on the sides, close to the slurry channel, of the side plates. The ceramic material outlet is communicated with the ceramic material inlet and used for discharging the ceramic material. According to the coating gasket, the nutrient ceramic material outlet and the mounting hole of the coating gasket are separately designed, and circulation of the ceramic material outlet and the ceramic runner on the main board is not affected after the mounting hole is connected with the die head, so that the coating gasket can be better and tightly attached to the die head, and the situation that the ceramic material overflows is avoided.

Description

Technical Field

[0001] The present application relates to the field of electrode coating technology, and in particular to a coating gasket and a coating device. Background Art

[0002] Pole plate coating is a critical step in battery production, and its effectiveness directly impacts the subsequent performance and safety of the product. Coating is achieved through a die and a coating gasket. To enhance battery safety, ceramic edges are applied to both sides of the pole plate.

[0003] When the gasket in the prior art is used to discharge the coating slurry and ceramic material, a ceramic feed port connected to the lower die head is provided on the gasket. The ceramic feed port is also an installation port for installing the upper die head and the lower die head, and the slurry flows out through the dispensing valve. In this way, since the upper and lower die heads and the lower die head are not tightly installed by fastening bolts, the upper die head and the lower die head are not tightly installed, resulting in leakage of the slurry. Utility Model Content

[0004] In order to solve at least one problem existing in the above-mentioned prior art, according to the first aspect of the present application, a coating gasket is provided, comprising: a main board, on which a ceramic material outlet is provided; a side plate, comprising two pieces, the two side plates being separated and arranged at both ends of the main board along the length direction of the main board, a slurry channel being formed between the two side plates, the side plates being provided with a ceramic flow channel and a mounting hole, the mounting hole being provided on the side of the side plate away from the slurry channel, for connecting to a die head, the ceramic flow channel being provided on the side of the side plate close to the slurry channel, and being connected to the ceramic material outlet for flowing out the ceramic material.

[0005] In some embodiments, the ceramic flow channel includes a first section and a second section arranged perpendicularly to each other, the first section is connected to the ceramic material outlet, and the second section is used to flow out the ceramic material. Along the flow direction perpendicular to the ceramic material, the width of the first section is greater than the width of the second section.

[0006] In some embodiments, a buffer groove and an outflow channel are further provided on the side plate, and the buffer groove is connected between the ceramic channel and the outflow channel. The outflow channel is used to flow out the ceramic material, and the width of the outflow channel is smaller than the width of the ceramic channel along the flow direction perpendicular to the ceramic material.

[0007] In some embodiments, the two side walls of the outflow channel are arranged in parallel and perpendicular to the length direction of the main board.

[0008] In some embodiments, a first hollow hole is provided in the middle of the side panel.

[0009] In some embodiments, the coating gasket further includes two lead ears, one of the side plates is connected to one of the lead ears, and scale lines are provided on the lead ears.

[0010] In some embodiments, a first chamfer is provided on one side of the side plate facing the slurry channel and away from the main plate, and the first chamfer is connected to the slurry channel.

[0011] In some embodiments, a second chamfer is provided on one side of the side plate facing the slurry channel and close to the main plate, and the second chamfer is connected to the slurry channel.

[0012] According to the second aspect of the present application, a coating device is provided, comprising: a lower die head, the lower die head being provided with a slurry chamber; an upper die head covering the lower die head; and the above-mentioned coating gasket, the coating gasket being provided between the upper die head and the lower die head.

[0013] In some embodiments, the coating device further includes a support frame, which is disposed in the slurry chamber and is used to support the side plate and enable the slurry to flow.

[0014] In some embodiments, the support frame includes a base frame and a deformation frame arranged on the top of the base frame, the base frame is provided with a flow groove connected to the slurry cavity, and the deformation frame is used to deform under the extrusion of the upper die head when the upper die head and the lower die head are installed.

[0015] In some embodiments, the base frame and the deformable frame are detachably connected.

[0016] In some embodiments, the base frame is made of polytetrafluoroethylene, and the deformation frame is made of silicone.

[0017] In some embodiments, a second hollow hole is provided on the deformation frame.

[0018] In summary, the coating gasket and coating device provided by this application have the following technical effects:

[0019] 1) By setting a ceramic material outlet on the main board that is connected to the ceramic flow channel on the side panel, the mounting hole for installing the coating gasket and the die head is set on the side of the side panel away from the slurry channel, so that the ceramic material outlet and the mounting hole of the coating gasket are designed separately. After the mounting hole and the die head are connected, it does not affect the ceramic material outlet on the main board and the circulation of the ceramic flow channel, so that the coating gasket can be better fitted tightly with the die head to avoid overflow of the ceramic material.

[0020] 2) By arranging a support frame in the lower die head to support the side plate, the deformation of the side plate is avoided, which may cause the ceramic material to overflow and the coating material to flow, thereby ensuring the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a coating gasket of the prior art;

[0022] Figure 2 This is a schematic structural diagram of a coating gasket according to the first embodiment of the present application;

[0023] Figure 3 for Figure 2 The enlarged schematic diagram of point I in the middle;

[0024] Figure 4 An exploded schematic diagram of a coating device according to a second embodiment of the present application;

[0025] Figure 5 This is another exploded schematic diagram of the coating device according to the second embodiment of the present application;

[0026] Figure 6 for Figure 4 Schematic diagram of the structure of the support frame;

[0027] Figure 7 for Figure 6 Schematic diagram of the exploded support frame in.

[0028] Figures: 100-coating gasket, 10-main board, 11-ceramic material outlet, 20-side panel, 21-ceramic flow channel, 211-first section, 212-second section, 22-mounting hole, 23-first hollow hole, 24-buffer tank, 25-outflow channel, 251-side wall, 26-first chamfer, 27-second chamfer, 30-slurry channel, 40-lead ear, 41-scale line, 200-coating device, 50-upper die, 60-lower die, 61-slurry cavity, 70-support frame, 71-bottom frame, 711-circulation groove, 712-card slot, 72-deformation frame, 721-second hollow hole, 300-coating gasket, 80-main board, 90-side panel, 91-mounting hole, 92-ceramic flow channel. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0030] In the description of this application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limiting this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1 , is a structural diagram of a coating gasket 300 in the prior art, including a main board 80 and two side panels 90 arranged at both ends along the length direction of the main board 80. The coating gasket 300 needs to be installed between the upper die head 50 and the lower die head 60.

[0034] Specifically, during installation, a mounting hole 91 for connecting the die head is provided on the side panel 90, and the upper die head 50 and the lower die head 60 are installed respectively through the mounting hole 91. In this way, since the ceramic material needs to flow out of the mounting hole 91, after the coating gasket 300 is set between the upper die head 50 and the lower die head 60, the upper die head 50 and the lower die head 60 are not tightly fitted to the coating gasket 300, thereby causing the ceramic material to overflow.

[0035] See also Figure 2 and Figure 3 , which is a coating gasket 100 provided in the first embodiment of the present application, includes a main board 10 and two side boards 20 .

[0036] Among them, a ceramic material outlet 11 is provided on the main board 10; the side panel 20 includes two pieces, and the two side panels 20 are separated and arranged at both ends of the main board 10 along the length direction of the main board 10, and a slurry channel 30 is formed between the two side panels 20. A ceramic flow channel 21 and a mounting hole 22 are provided on the side panel 20. The mounting hole 22 is provided on the side of the side panel 20 away from the slurry channel 30 for connection with the die head. The ceramic flow channel 21 is provided on the side of the side panel 20 close to the slurry channel 30 and is connected to the ceramic material outlet 11 for the outflow of ceramic material.

[0037] The above-mentioned coating gasket 100 is configured by arranging a ceramic material outlet 11 on the main board 10 that is connected to the ceramic flow channel 21 on the side board 20, and arranging the mounting hole 22 for mounting the coating gasket 100 and the die head on the side of the side board 20 away from the slurry channel 30, so that the ceramic material outlet 11 and the mounting hole 22 of the coating gasket 100 are designed separately. After the mounting hole 22 is connected to the die head, the circulation of the ceramic material outlet 11 and the ceramic flow channel 21 on the main board 10 is not affected, so that the coating gasket 100 can better fit tightly with the die head to avoid overflow of the ceramic material.

[0038] See also Figure 2 In one embodiment of the present application, in order to reduce the molding material of the side panel 20, a first hollow hole 23 is provided in the middle of the side panel 20. By setting the first hollow hole 23, the molding material of the side panel 20 is reduced, thereby achieving the effect of saving materials.

[0039] The first hollow hole 23 of this embodiment is square in shape. In other embodiments, the first hollow hole 23 may be circular, trapezoidal, or other shapes, which is not limited here.

[0040] See also Figure 2 In one embodiment of the present application, when the ceramic flow channel 21 is set, the ceramic flow channel 21 includes a first section 211 and a second section 212 arranged perpendicularly to each other, the first section 211 is connected to the ceramic material outlet 11, and the second section 212 is used to flow out the ceramic material. Along the flow direction perpendicular to the ceramic material, the width of the first section 211 is greater than the width of the second section 212. In this way, by setting the ceramic flow channel 21 as two sections with different widths, when the ceramic material flows out from the ceramic material outlet 11, it first flows into the first section 211 with a larger width, and then flows into the second section 212 with a smaller width. Due to the reduction in the flow cross-sectional area, the ceramic material can have a greater flow rate, and when it flows from the coating gasket 100 to the electrode, it can have a greater coating speed, thereby improving the efficiency of the electrode coating.

[0041] Furthermore, since the length of the main board 10 and the width of the slurry channel 30 are certain, when the ceramic material outlet 11 is set on the main board 10 in this application, relative to Figure 1 Compared with the arrangement of the ceramic flow channel 21 in the prior art, the total length of the ceramic flow channel 21 in the present application is less than the total length of the ceramic flow channel 92 in the prior art. Since the ceramic material in the prior art flows through a longer flow channel, the pressure loss of the ceramic material is greater, thereby reducing the speed of the ceramic material flowing out of the coating gasket 100, which is not conducive to the coating of the ceramic material on the electrode surface. Therefore, the arrangement of the ceramic flow channel 21 in the present application can ensure the outflow speed of the ceramic material from the side plate 20.

[0042] Furthermore, in order to ensure the flow stability of the ceramic material when it flows out from the side plate 20, a buffer groove 24 and an outflow channel 25 are also provided on the side plate 20. The buffer groove 24 is connected to the ceramic channel 21, and the outflow channel 25 is used to flow out the ceramic material. Along the flow direction perpendicular to the ceramic material, the width of the outflow channel 25 is smaller than the width of the ceramic channel 21. Therefore, by setting the buffer groove 24, when the ceramic material flows from the second section 212, it can enter the buffer groove 24 for aggregation and pressurization, thereby ensuring the stability of the flow of the ceramic material when it flows out from the ceramic channel 21. By setting the outflow channel 25 with a smaller width, the flow velocity of the ceramic material when it flows out can be guaranteed.

[0043] Among them, see Figure 3 When the outflow channel 25 is set, the two side walls 251 of the outflow channel 25 are set in parallel and perpendicular to the length direction of the main board 10, so that the two side walls 251 of the outflow channel 25 are set in parallel. When the ceramic material flows out of the outflow channel 25, there is a relatively Figure 1 The arrangement of the outflow channel 25 in the prior art prevents the ceramic material from diffusing outwards and overlapping with the coating material, thereby reducing the risk of material cross-contamination and improving the feeding stability.

[0044] Furthermore, each corner of the buffer groove 24 is chamfered, so that the ceramic material can flow out evenly along the smooth inner wall, thereby preventing the ceramic material from being retained in the buffer groove 24 .

[0045] See also Figure 2 In one embodiment of the present application, in order to facilitate the installation of the coating gasket 100 in the die head, the coating gasket 100 also includes two lead ears 40, a side plate 20 is connected to a lead ear 40, and a scale line 41 is provided on the lead ear 40. By setting the scale line 41 on the lead ear 40, the coating gasket 100 can be conveniently installed on the die head through the scale line 41, thereby improving the installation efficiency of the coating gasket 100.

[0046] Further, see Figure 3 A first chamfer 26 is provided on one end of the side plate 20 facing the slurry channel 30 and away from the side of the main board 10. The first chamfer 26 is connected to the slurry channel 30. In this way, each side plate 20 is provided with a first chamfer 26, so that the opening of the slurry channel 30 is in an inverted eight shape, so that when the coating slurry flows out of the slurry channel 30, it can flow outward, avoiding the accumulation of slurry in the middle area and forming a thicker thickness after coating on the electrode, thereby causing the electrode to crack after coating.

[0047] Furthermore, a second chamfer 27 is provided on one end of the side plate 20 facing the slurry channel 30 and close to the side of the main plate 10. The second chamfer 27 is connected to the slurry channel 30. Through the setting of the second chamfer 27, when the coating slurry flows out of the slurry channel 30, it avoids being blocked by the right angle of the side plate 20, so that the slurry inside the cavity of the die head can flow out more evenly, thereby keeping the viscosity of the slurry in the die cavity stable.

[0048] The above-mentioned coating gasket 100 increases the flow rate of the ceramic material by setting the ceramic flow channel 21 to include a first section 211 with a larger width and a second section 212 with a smaller width. At the same time, by setting a buffer groove 24 and an outflow channel 25, the width of the outflow channel 25 is made smaller than the width of the ceramic flow channel 21, so that the ceramic material can have a larger flow rate when coating on the electrode, thereby ensuring the coating efficiency; by setting a lead ear 40 on the side plate 20, and providing a scale line 41 on the lead ear 40, the installation of the coating gasket 100 on the die head is facilitated.

[0049] See also Figures 4 to 7 In the second embodiment, the present application further provides a coating device 200 , which includes an upper die 50 , a lower die 60 and the coating gasket 100 of the above embodiment.

[0050] The lower die head 60 is provided with a slurry cavity 61 ; the upper die head 50 covers the lower die head 60 ; and the coating gasket 100 is provided between the upper die head 50 and the lower die head 60 .

[0051] The above-mentioned coating device 200, when the coating gasket 100 is installed with the upper die head 50 and the lower die head 60 respectively, the mounting holes 22 on the coating gasket 100 connecting the upper die head 50 and the lower die head 60 are set on the side panel 20, and the ceramic material outlet 11 is set on the main board 10, so that when installing through the mounting holes 22, the upper die head 50 and the lower die head 60 can be ensured to fit tightly with the coating gasket 100 respectively, thereby avoiding overflow of the ceramic material.

[0052] Furthermore, since the slurry cavity 61 is formed in the lower die head 60, the side plate 20 is mounted on the slurry cavity 61, and since the coating gasket 100 is relatively thin, about 0.5-0.6 mm, the side plate 20 is easily bent when installed between the upper die head 50 and the lower die head 60, thereby causing the ceramic material in the ceramic flow channel 21 to overflow into the slurry cavity 61 and cause mixing with the coating material. Please refer to Figures 4 to 7In order to solve the above technical problems, the coating device 200 also includes a support frame 70, which is arranged in the slurry chamber 61 to support the side plate 20 and enable the slurry to flow. In this way, by setting the support frame 70, the side plate 20 can be supported to avoid the side plate 20 from bending and causing the ceramic material to overflow into the slurry chamber 61, thereby ensuring the quality of coating.

[0053] Specifically, the support frame 70 includes a base frame 71 and a deformation frame 72 arranged on the top of the base frame 71. The base frame 71 is provided with a flow groove 711 connected to the slurry chamber 61. The deformation frame 72 is used to be deformed under the extrusion of the upper die head 50 when installed with the upper die head 50 and the lower die head 60. In this way, by setting the support frame 70 to include two parts, the upper die head 50 will extrude and deform the coating gasket 100 when it is installed with the lower die head 60. Since the deformation frame 72 is provided, the deformation frame 72 can be extruded and deformed, which has a buffering effect and avoids extrusion and deformation of the coating gasket 100.

[0054] It is understandable that the base frame 71 and the deformation frame 72 of this embodiment need to be made of corrosion-resistant materials to avoid corrosion caused by long-term immersion in the coating material. Specifically, the base frame 71 is made of polytetrafluoroethylene, and the deformation frame 72 is made of silicone.

[0055] Furthermore, since the deformation frame 72 will age and deform after long-term use, in order to facilitate the replacement of the deformation frame 72, the base frame 71 and the deformation frame 72 are detachably connected, thereby facilitating the removal and replacement of the deformation frame 72. Figure 7 When realizing the detachable connection between the base frame 71 and the deformation frame 72, a card slot 712 is provided on the base frame 71, and the deformation frame 72 is carded in the card slot 712, so that the deformation frame 72 is installed in a card-set manner, so as to facilitate the installation and removal of the deformation frame 72.

[0056] The deformation frame 72 is provided with a second hollow hole 721 , thereby reducing the cross-sectional area of ​​the entire deformation frame 72 , so as to facilitate deformation of the deformation frame 72 under pressure.

[0057] The coating device 200 supports the side plate 20 by arranging a support frame 70 in the lower die head 60, thereby avoiding the side plate 20 from deforming and causing the ceramic material to overflow and the coating material to flow, thereby ensuring the coating quality.

[0058] The technical means disclosed in the present application are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present application, and such improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A coating gasket (100), characterized in that include: A main board (10), wherein the main board (10) is provided with a ceramic material outlet (11); The side panels (20) include two pieces. The two side panels (20) are separated and arranged at both ends of the main board (10) along the length direction of the main board (10). A slurry channel (30) is formed between the two side panels (20). A ceramic flow channel (21) and a mounting hole (22) are provided on the side panels (20). The mounting hole (22) is provided on the side of the side panel (20) away from the slurry channel (30) for connection with the die head. The ceramic flow channel (21) is provided on the side of the side panel (20) close to the slurry channel (30) and is connected to the ceramic material outlet (11) for outflowing the ceramic material.

2. The coating gasket (100) according to claim 1, characterized in that The ceramic flow channel (21) includes a first section (211) and a second section (212) arranged perpendicularly to each other, the first section (211) is connected to the ceramic material outlet (11), and the second section (212) is used to flow out the ceramic material. Along the flow direction perpendicular to the ceramic material, the width of the first section (211) is greater than the width of the second section (212).

3. The coating gasket (100) according to claim 1 or 2, characterized in that: The side plate (20) is further provided with a buffer groove (24) and an outflow channel (25). The buffer groove (24) is connected between the ceramic channel (21) and the outflow channel (25). The outflow channel (25) is used to flow out the ceramic material, and the width of the outflow channel (25) is smaller than the width of the ceramic channel (21) along a flow direction perpendicular to the ceramic material.

4. The coating gasket (100) according to claim 3, characterized in that The two side walls (251) of the outflow channel (25) are arranged in parallel and perpendicular to the length direction of the main board (10).

5. The coating gasket (100) according to claim 1 or 2, characterized in that: A first hollow hole (23) is provided in the middle of the side plate (20).

6. The coating gasket (100) according to claim 1 or 2, characterized in that: The coating gasket (100) further comprises two guide ears (40), one side plate (20) is connected to one guide ear (40), and a scale line (41) is provided on the guide ear (40).

7. The coating gasket (100) according to claim 1 or 2, characterized in that: A first chamfer (26) is provided on one end of the side plate (20) facing the slurry channel (30) and away from the main plate (10), and the first chamfer (26) is connected to the slurry channel (30).

8. The coating gasket (100) according to claim 1 or 2, characterized in that: A second chamfer (27) is provided on one end of the side plate (20) facing the slurry channel (30) and close to the main plate (10), and the second chamfer (27) is connected to the slurry channel (30).

9. A coating device (200), characterized in that: include: A lower die head (60), wherein the lower die head is provided with a slurry cavity (61); An upper die head (50) is covered on the lower die head; The coating gasket (100) according to any one of claims 1 to 8, wherein the coating gasket (100) is arranged between the upper die head (50) and the lower die head (60).

10. The coating device (200) according to claim 9, characterized in that: The coating device (200) further comprises a support frame (70), wherein the support frame (70) is arranged in the slurry chamber (61) and is used to support the side plate (20) and enable slurry to flow.

11. The coating device (200) according to claim 10, characterized in that: The support frame (70) includes a base frame (71) and a deformation frame (72) arranged on the top of the base frame (71), the base frame (71) is provided with a flow groove (711) connected to the slurry chamber (61), and the deformation frame (72) is used to deform under the extrusion of the upper die head (50) when the upper die head (50) and the lower die head (60) are installed.

12. The coating device (200) according to claim 11, characterized in that The base frame (71) and the deformation frame (72) are detachably connected.

13. The coating device (200) according to claim 11 or 12, characterized in that: The base frame (71) is made of polytetrafluoroethylene, and the deformation frame (72) is made of silicone.

14. The coating device (200) according to claim 11 or 12, characterized in that: The deformation frame (72) is provided with a second hollow hole (721).

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