Coating gasket and coating equipment

Abstract

The utility model relates to the technical field of battery manufacturing equipment, in particular to a coating gasket and coating equipment. The coating gasket comprises a gasket body and a flow blocking piece; the gasket body is provided with a gasket opening with the opening direction being the first direction. The flow blocking piece is connected to the gasket body, at least part of the flow blocking piece is located within the range of the gasket opening, the flow blocking piece extends in the first direction and comprises a body part and a thinned part, the body part is connected to the gasket body, the thinned part is connected to the end, away from the gasket body, of the body part, and the ratio of the second thickness of the thinned part to the first thickness of the body part is 0.2-1. The thinned part is provided with at least one buffer edge; included angles which are not 0 degree, 90 degrees and 180 degrees are formed between the extension direction of the buffer edge and the first direction, and the extension direction is parallel to a connecting line between two end points of the buffer edge. According to the structural design, the buffering edge is arranged on the thinned part, so that a smoother transition effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to a coating gasket and coating equipment. Background Art

[0002] The surface coating of the pole piece is an important process in the battery production process. The quality of the pole piece coating effect determines the difficulty, quality and production efficiency of the subsequent battery production process. In order to achieve the intermediate thinning effect of the coating slurry, a rectangular milling groove is set at the end of the intermediate baffle of the coating gasket in the existing extrusion coating equipment. However, the extrusion coating equipment with the above structure is too abrupt in blocking the slurry during thinning, so that after the slurry in the thinning area is blocked, the slurry in the unthinned area does not have enough time to flow to the thinning area, resulting in a sudden decrease in slurry thickness from the unthinned area to the thinning area. In addition, during the baking process of the pole piece, due to inconsistent drying speeds and the influence of surface tension, the slurry is prone to cracking at the junction of the unthinned area and the thinned area after drying, affecting the quality of the pole piece. Utility Model Content

[0003] A main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art and provide a coating gasket capable of realizing a smooth transition of slurry between an unthinned area and a thinned area of ​​a pole piece.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, a coating gasket is provided, which includes a gasket body and a flow baffle; the gasket body has a gasket opening with an opening direction in a first direction; the flow baffle is connected to the gasket body and is at least partially located within the range of the gasket opening, the flow baffle extends along the first direction, the flow baffle includes a main body portion and a thinned portion, the main body portion is connected to the gasket body, the thinned portion is connected to the end of the main body portion away from the gasket body, the ratio of the second thickness of the thinned portion to the first thickness of the main body portion is 0.2 to 1, and the thinned portion has at least one buffer edge; wherein the extension direction of the buffer edge has an angle with the first direction that is not 0, 90° and 180°, and the extension direction is parallel to the line between the two end points of the buffer edge.

[0006] It can be seen from the above technical solution that the advantages and positive effects of the coated gasket proposed by the utility model are:

[0007] The coated gasket proposed in the utility model includes a gasket body and a flow baffle; the gasket body has a gasket opening with an opening direction in a first direction; the flow baffle is connected to the gasket body and extends along the first direction, and a thinning portion is arranged at the end of the flow baffle away from the gasket body, the ratio of the second thickness of the thinning portion to the first thickness of the main body is 0.2 to 1, and the thinning portion has at least one buffer edge; the extension direction of the buffer edge has an angle with the first direction that is not 0, 90° and 180°, and the extension direction is parallel to the line connecting the two end points of the buffer edge. Through the above-mentioned structural design, the utility model improves the structure of the thinning portion of the baffle, and arranges a buffer edge in the thinning portion. The buffer bevel edge can be used to gradually transition the thinning amount of the slurry from small to large when thinning, providing sufficient time for the slurry in the un-thinned area to flow to the thinning area. The slurry away from the un-thinned area can gradually flow to the buffer edge in a gradient, thereby achieving a smoother transition effect, so that the thickness of the slurry from the un-thinned area to the thinned area tends to gradually decrease, thereby reducing the risk of cracking caused by stress concentration during drying and improving the quality of the electrode.

[0008] Another main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide a coating device using the above-mentioned coating gasket.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] According to another aspect of the present invention, a coating device is provided, which includes the above-mentioned coating gasket proposed by the present invention.

[0011] It can be seen from the above technical solution that the advantages and positive effects of the coating equipment proposed by the utility model are:

[0012] The coating equipment proposed in the utility model, by adopting the coating gasket proposed in the utility model, can make the thickness of the slurry gradually decrease from the unthinned area to the thinned area, thereby reducing the risk of cracking caused by stress concentration during drying and improving the quality of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0014] Figure 1 is a schematic plan view of a coating gasket according to an exemplary embodiment;

[0015] Figure 2 yes Figure 1A schematic plan view of the baffle shown;

[0016] Figure 3 yes Figure 2 Side view of

[0017] Figure 4 yes Figure 2 A schematic diagram comparing the flow filling paths of the baffle member and a baffle member of a conventional coated gasket during slurry leveling;

[0018] Figure 5 and Figure 6 Schematic diagrams of plan views of baffles of coated gaskets according to two other exemplary embodiments;

[0019] Figure 7 yes Figure 6 A partial enlarged schematic diagram of the baffle is shown;

[0020] Figure 8 is a partially enlarged schematic diagram of a baffle of a coated gasket according to another exemplary embodiment;

[0021] Fig. 9 yes Figure 8 Side view of

[0022] Figures 10 to 14 They are respectively partial enlarged schematic diagrams of baffles of coated gaskets according to other exemplary embodiments;

[0023] Fig.15 is a schematic diagram of a three-dimensional structure of a coating device according to an exemplary embodiment;

[0024] Fig.16 yes Fig.15 Side view of.

[0025] The following are the descriptions of the reference numerals:

[0026] 100. Coated gasket;

[0027] 110. Gasket body;

[0028] 111. Gasket opening;

[0029] 120. Flow blocking parts;

[0030] 121.Thinning part;

[0031] 1211. Buffer edge;

[0032] 1212. Region 1;

[0033] 1213. Second area;

[0034] 122. Ontology part;

[0035] 200. Upper die head;

[0036] 300. Lower die head;

[0037] α. Angle;

[0038] d1. first thickness;

[0039] d2. The second thickness;

[0040] d3. The third thickness;

[0041] d4. fourth thickness;

[0042] L. Connection;

[0043] X. First direction;

[0044] Z. Thickness direction. DETAILED DESCRIPTION

[0045] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0046] See also Figure 1 , which representatively shows a plan view of the coating gasket 100 proposed in the utility model. In this exemplary embodiment, the coating gasket 100 proposed in the utility model is described by taking the coating equipment applied to the pole piece coating as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the utility model to other types of coating equipment, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the coating gasket 100 proposed in the utility model.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the coating gasket 100 provided by the present invention includes a gasket body 110 and a baffle 120. Figures 2 to 4 ; Figure 2 A schematic plan view of the baffle 120 is representatively shown in FIG. Figure 3 Representatively shown in Figure 2 A side view of the baffle 120 is shown; Figure 4 Representatively shown in Figure 2The flow-filling path comparison diagram of the baffle 120 shown is compared with that of a conventional coated gasket 100 during the slurry leveling process. The structure, connection mode and functional relationship of each main component of the coated gasket 100 proposed by the utility model will be described in detail below in conjunction with the above drawings.

[0048] like Figures 1 to 3 As shown, in one embodiment of the present invention, the gasket body 110 has a gasket opening 111 with an opening direction in the first direction X. The baffle 120 is connected to the gasket body 110 and is at least partially located within the range of the gasket opening 111. The baffle 120 extends along the first direction X. The baffle 120 includes a main body 122 and a thinning portion 121. The main body 122 is connected to the gasket body 110, and the thinning portion 121 is connected to the end of the main body 122 away from the gasket body 110. The so-called thinning portion 121 refers to the thinning area of ​​the slurry on the surface of the pole piece that can be formed by the thinning portion 121 when the coating gasket 100 is installed in the coating equipment and used for pole piece coating. Therefore, the end of the gasket body 110 is named as the thinning portion 121, and the naming is not used to limit the thickness of the portion or any special design of the relationship between the thickness of the portion and other portions of the baffle 120 (such as the main body 122). For example, the second thickness d2 of the thinning portion 121 can be less than or equal to the first thickness d1 of the main body 110. Specifically, the ratio of the second thickness d2 to the first thickness d1 can be 0.2 to 1, such as 0.2, 0.3, 0.5, 0.7, 0.9, 1, etc., thereby preventing the second thickness d2 of the thinning portion 121 from being too thin and causing the slurry on both sides to flow and overlap during the coating process, thereby ensuring the thinning effect of the slurry. The thinning portion 121 has at least one buffer edge 1211. On this basis, the extension direction of the buffer edge 1211 has an angle α that is not 0, 90°, and 180° with the first direction X. The extension direction can be understood as being parallel to the line L between the two end points of the buffer edge 1211. For example, Figures 1 to 3In the embodiment shown, the shape of the buffer edge 1211 is a straight line, for example, and the straight buffer edge 1211 itself is equivalent to the above-mentioned connecting line L. For another example, in the embodiment shown in 5, the shape of the buffer edge 1211 is an arc, and the corresponding chord of the arc-shaped buffer edge 1211 is the above-mentioned connecting line L. In this case, the extension direction of the chord is the above-mentioned extension direction of the buffer edge 1211. Through the above-mentioned structural design, the utility model improves the structure of the thinning portion 121 of the baffle 120, and sets a buffer edge 1211 on the thinning portion 121. The buffer bevel can be used to gradually transition the thinning amount of the slurry from small to large when thinning, providing sufficient time for the slurry in the un-thinned area to flow to the thinned area. The slurry away from the un-thinned area can gradually flow to the buffer edge 1211 in a gradient, thereby achieving a smoother transition effect, so that the thickness of the slurry from the un-thinned area to the thinned area tends to gradually decrease, thereby reducing the risk of cracking caused by stress concentration during drying and improving the quality of the electrode.

[0049] It should be noted that since the direction is bidirectional, for example, the first direction X has one direction facing the gasket body 110 and another direction away from the gasket body 110, for the convenience of description and identification, when describing the angle α in each embodiment in this specification, the angle between the above-mentioned connecting line L and the direction of the first direction X away from the gasket body 110 shall prevail. Figure 4 and Figure 5 In the embodiment shown, the angle α is an acute angle, that is, the angle α is greater than 0 and less than 90°. Figure 7 In the illustrated embodiment, the angle α is an obtuse angle, that is, the angle α is greater than 90° and less than 180°.

[0050] like Figure 2 and Figure 3As shown, in one embodiment of the present invention, the second thickness d2 of the thinning portion 121 can be less than the first thickness d1 of the main body 122, that is, the ratio of the second thickness d2 to the first thickness d1 is greater than or equal to 0.2 and less than 1, and the buffer edge 1211 is located on the side of the thinning portion 121 close to the main body 122. In the thickness direction Z, one side surface of the thinning portion 121 is flush with one side surface of the main body 122, and the other side surface of the thinning portion 121 and the other side surface of the main body 122 are in a stepped structure with each other. In addition, the thinning portion 121 can be provided with a groove structure, and the groove structure can be, for example but not limited to, a milling groove, and the intersection of the groove structure and the rest of the thinning portion 121 without a groove structure is the buffer edge 1211. Through the above structural design, when the coating gasket 100 proposed by the utility model is installed in the coating equipment and used for pole piece coating, the slurry can be gradually thinned from the direction away from the unthinned area to the direction close to the unthinned area to achieve buffering. During the thinning process, the slurry away from the unthinned area can gradually flow toward the buffer bevel in a gradient, making the transition smoother. Figure 4 , where the dotted line frame represents the outline of a rectangular milling groove used in an existing gasket design, and the dotted line arrow is the path that the slurry needs to flow and fill when leveling under the existing design. It can be seen that the path is long, which is equivalent to a long leveling time. In contrast, the solid line frame indicates that the utility model is used in, for example, Figures 1 to 3 The thinning portion 121 with a buffer edge 1211 is used in the illustrated embodiment, and the second thickness d2 of the thinning portion 121 is smaller than the first thickness d1 of the main body 122. In order to further distinguish and identify, some of the drawings use dot filling patterns to fill part of the thinning portion 121 of the utility model with a milling groove design, that is, the dot-filled area represents the milling groove, and the solid arrow is the path that the slurry needs to flow and fill for leveling under this design. It can be seen that compared with the existing solution, the flow filling path when applying the utility model is shorter and presents a transition trend. Different from Figure 2 and Figure 3 In the illustrated embodiment, the thinned portion 121 is designed to be a sheet-like structure. In an embodiment not shown in the figure, the second thickness d2 of the thinned portion 121 can be gradually reduced from one end connected to the main body 122 to one end away from the main body 122. For example, in the thickness direction Z, one side surface of the thinned portion 121 is flush with one side surface of the main body 122, and the other side surface of the thinned portion 121 can be designed to be, for example, a slope or an arc slope.

[0051] It should be noted that in the actual design process of the coated gasket proposed in the present disclosure, the length of the baffle 120 can be flexibly selected according to the thinning amount of the pole piece slurry (i.e., the difference between the slurry thickness in the middle area of ​​the pole piece and the slurry thickness in the edge area), so as to avoid the baffle 120 being too short and difficult to play a thinning role, and at the same time, to avoid the baffle 120 being too long and causing the gasket body 110 to have the risk of scratching the pole piece foil. For example, when the thinning amount of the pole piece slurry is 1μm to 30μm, the length of the baffle 120 can be 80mm to 90mm.

[0052] like Figure 4 As shown, in one embodiment of the present invention, the angle α between the extension direction of the buffer edge 1211 and the first direction X (a direction away from the gasket body 110) can be 15° to 75°, such as 15°, 20°, 30°, 45°, 60°, 75°, etc. In other words, the angle α is an acute angle, that is, the buffer edge 1211 is inclined to face the side of the gasket body 110. In some embodiments, when the angle α is an acute angle, the angle α can also be less than 15°, or can be greater than 75°, such as 10°, 80°, etc., and is not limited to this embodiment.

[0053] like Figure 2 and Figure 4 As shown, in one embodiment of the present invention, the shape of the buffer edge 1211 can be a straight line. In this case, the line L between the two end points of the buffer edge 1211 is the buffer edge 1211 itself, and the angle α between the line L and the first direction X (a direction away from the gasket body 110) is the angle between the buffer edge 1211 itself and the first direction X.

[0054] See also Figure 5 , Figure 5 00 is a plan view of a flow baffle 120 of a coated gasket 100 in another exemplary embodiment that can embody the principle of the present invention, wherein a partial area of ​​the flow baffle 120 is specifically enlarged to more clearly show the buffer edge 1211 and the connecting line L between its two end points.

[0055] Different from Figure 2 and Figure 4 In the embodiment shown, the shape of the buffer edge 1211 is a linear structure design, such as Figure 5As shown, in one embodiment of the present invention, the shape of the buffer edge 1211 may also be an arc shape. At this time, the line L between the two end points of the buffer edge 1211 is the chord of the arc corresponding to the buffer edge 1211, and the angle α between the line L and the first direction X (a direction away from the gasket body 110) is the angle between the chord of the arc corresponding to the buffer edge 1211 and the first direction X. In some embodiments, the shape of the buffer edge 1211 is not limited to the above-mentioned straight line shape and arc shape, and can also be other shapes such as an elliptical arc shape, and is not limited to the above-mentioned embodiments.

[0056] For example, for Figure 5 The illustrated embodiment can be designed with specific reference to the following parameters: the radius of the corresponding circle of the arc-shaped buffer edge 1211 can be 3 mm to 10 mm, and the central angle of the arc can be 90° to 270°; the thickness of the thinned portion 121 is substantially consistent with that of the main body portion 122, and the thickness (for example, the first thickness d1 and the second thickness d2) can be 0.6 mm to 1.5 mm.

[0057] See also Figure 6 and Figure 7 , Figure 6 2 is a schematic plan view of a flow blocking member 120 of a coated gasket 100 in another exemplary embodiment of the coated gasket 100 that can embody the principle of the present invention; Figure 7 Representatively shown in Figure 6 A partial enlarged schematic diagram of the baffle 120 is shown to more clearly show the thinned portion 121 .

[0058] Different from Figure 2 or Figure 5 In the illustrated embodiments, the buffer edge 1211 is located on the side of the thinned portion 121 facing the gasket body 110. Figure 6 As shown, in one embodiment of the present invention, the second thickness d2 of the thinning portion 121 can be equal to the first thickness d1 of the main body 122, that is, the ratio of the second thickness d2 to the first thickness d1 is equal to 1, and the buffer edge 1211 is located on the side of the thinning portion 121 away from the gasket body 110. Among them, in the thickness direction Z, the two side surfaces of the thinning portion 121 are respectively flush with the two side surfaces of the main body 122. In other words, the flow blocking member 120 can be a structure with uniform thickness. Through the above-mentioned structural design, since the second thickness d2 of the thinning portion 121 is equal to the first thickness d1 of the main body 122, and the buffer edge 1211 is only provided on the side of the thinning portion 121 away from the gasket body 110, accordingly, when the coating gasket 100 proposed by the present invention is installed in the coating equipment and used for pole piece coating, the slurry in the thinning area can be blocked and then gradually leveled toward the buffer edge 1211 to achieve thinning. Refer to Figure 7, where the solid arrow is the path that the slurry needs to flow and fill for leveling under this design. It can be seen that the flow and filling path when the utility model is applied is shorter and shows a transition trend.

[0059] like Figure 7 As shown, in one embodiment of the present invention, the angle α between the extension direction of the buffer edge 1211 and the first direction X (a direction away from the gasket body 110) can be 105° to 165°, for example, 105°, 110°, 120°, 135°, 150°, 165°, etc. In other words, the angle α is an obtuse angle, that is, the buffer edge 1211 is inclined away from one side of the gasket body 110. In some embodiments, when the angle α is an obtuse angle, the angle α can also be less than 105°, or can be greater than 165°, for example, 100°, 170°, etc., and is not limited to this embodiment.

[0060] See also Figure 8 and Fig. 9 , Figure 8 1 is a representative diagram of a partially enlarged schematic diagram of a flow blocking member 120 of a coated gasket 100 in another exemplary embodiment of the coated gasket 100 that can embody the principle of the present invention, wherein an enlarged structure of a thinned portion 121 is specifically shown; Fig. 9 Representatively shown in Figure 8 A side view of the structure is shown.

[0061] exist Figure 6 and Figure 7 In the embodiment shown, the buffer edge 1211 is tilted away from the side of the gasket body 110. Figure 8 and Fig. 9 As shown, in one embodiment of the present invention, the thinning portion 121 may further include a first area 1212 and a second area 1213, wherein the first area 1212 is connected to the main body 122, and the second area 1213 is located on the side of the first area 1212 away from the main body 122, and the fourth thickness d4 of the thinning portion 121 in the second area 1213 is less than the third thickness d3 of the thinning portion 121 in the first area 1212, and in the thickness direction Z, one side surface of the thinning portion 121 is flush with one side surface of the main body 122, and a buffer edge 1211 is formed at the junction of the first area 1212 and the second area 1213. In addition, the second area 1213 of the thinning portion 121 may be a groove structure (for example but not limited to a milling groove), and the side of the milling groove connected to the first area 1212 is the buffer edge 1211. Through the above structural design, the present invention can further reduce the thickness difference required for leveling, making leveling easier.

[0062] like Fig. 9As shown, based on the structural design that the fourth thickness d4 of the thinned portion 121 in the second area 1213 is smaller than the third thickness d3 in the first area 1212 , in one embodiment of the utility model, the fourth thickness d4 of the thinned portion 121 in the second area 1213 may be smaller than the first thickness d1 of the main body 122 .

[0063] like Fig. 9 As shown, based on the structural design that the fourth thickness d4 of the thinned portion 121 in the second area 1213 is less than the third thickness d3 of the thinned portion 121 in the first area 1212, in one embodiment of the utility model, the third thickness d3 of the thinned portion 121 in the first area 1212 can be equal to the first thickness d1 of the main body 122.

[0064] Different from Figure 8 and Fig. 9 In the illustrated embodiment, the first region 1212 and the second region 1213 of the skived portion 121 are both sheet-shaped. In an embodiment not shown in the figure, the fourth thickness d4 of the skived portion 121 in the second region 1213 may be gradually reduced from one end connected to the first region 1212 to one end away from the first region 1212. For example, in the thickness direction Z, one side surface of the first region 1212 of the skived portion 121 is flush with one side surface of the second region 1213, and the other side surface of the second region 1213 may be, for example, sloped or arc-shaped.

[0065] like Figure 2 , Figure 5 , Figure 6 and Figure 8 In some embodiments of the present invention, the thinning portion 121 may be provided with two buffer edges 1211. On this basis, the two buffer edges 1211 may be symmetrically arranged relative to a symmetry axis parallel to the first direction X.

[0066] like Figure 8 As shown, based on the structural design that the thinning portion 121 has two symmetrically arranged buffer edges 1211, in one embodiment of the utility model, the two buffer edges 1211 are each separated from one end of the main body 122 along a second direction, and the second direction is perpendicular to the first direction and to the thickness direction, and the other end of the buffer edge 1211 close to the main body 122 is separated from the edge of the thinning portion 121 connected to the main body 122 in the first direction X.

[0067] See also Figures 10 to 14 , Figures 10 to 14The enlarged schematic diagrams of the flow blocking member 120 of the coating gasket 100 that can embody the principle of the utility model are respectively and representatively shown, wherein the enlarged structure of the thinning portion 121 is specifically shown, and the implementation methods represented by the above figures are all based on the thinning portion 121 having two symmetrically arranged buffer edges 1211 as an example, and the thinning portion 121 includes a first area 1212 and a second area 1213. Figures 10 to 14 The various embodiments represented are Figure 8 The main differences between the represented embodiments are illustrated by way of example.

[0068] like Fig.10 As shown, in one embodiment of the utility model, the shapes of the two buffer edges 1211 are both straight lines, and the two buffer edges 1211 each overlap at one end facing away from the main body 122, and the other end of the buffer edge 1211 close to the main body 122 is spaced apart from the edge of the thinning portion 121 connected to the main body 122 in the first direction X.

[0069] like Fig.11 As shown, in one embodiment of the utility model, the shapes of the two buffer edges 1211 are both straight lines, and the two buffer edges 1211 are spaced apart along the second direction at one end point away from the main body 122, and the other end point of the buffer edge 1211 close to the main body 122 coincides with the edge of the thinning portion 121 connected to the main body 122.

[0070] like Fig.12 As shown, in one embodiment of the utility model, the two buffer edges 1211 are both straight in shape, and one end point of the two buffer edges 1211 facing away from the main body 122 coincides with each other, and the other end point of the buffer edge 1211 close to the main body 122 coincides with the edge of the thinning portion 121 connected to the main body 122.

[0071] For example, for Figure 8 , Figure 10 to Figure 11Each of the embodiments shown can be designed with specific reference to the following parameters: the width of the thinning portion 121 in the second direction can be 6mm to 20mm; the length of the thinning portion 121 in the first direction X can be 2mm to 10mm; the width of a single milling groove (i.e., the second area 1213) in the thinning portion 121 accounts for 1 / 6 to 1 / 2; the length of a single milling groove (i.e., the second area 1213) in the thinning portion 121 (i.e., the length of a single milling groove along the first direction X accounts for the length of the thinning portion 121 along the first direction X) can be 1 / 3 to 1; the ratio of the thickness d4 of the thinning portion 121 in the second area 1213 to its thickness d3 in the first area 1212 can be 1 / 4 to 3 / 4. In other words, the depth of the milling groove can account for 1 / 4 to 3 / 4 of the thickness of the thinning portion 121 (e.g., the thickness d1 of the main body 122 or the thickness d4 of the thinning portion 121 in the second area 1213).

[0072] like Fig.13 As shown, in one embodiment of the utility model, the two buffer edges 1211 are both arc-shaped, and the two buffer edges 1211 are each separated from one end of the main body 122 along the second direction, and the other end of the buffer edge 1211 close to the main body 122 is separated from the edge of the thinning portion 121 connected to the main body 122 in the first direction X.

[0073] like Fig.14 As shown, in one embodiment of the utility model, the two buffer edges 1211 are both arc-shaped, and one end of the two buffer edges 1211 facing away from the main body 122 coincides with each other, and the other end of the buffer edge 1211 close to the main body 122 coincides with the edge of the thinning portion 121 connected to the main body 122.

[0074] For example, for Fig.13 and Fig.14 Each of the embodiments shown can be designed with specific reference to the following parameters: the ratio of the thickness d4 of the thinned portion 121 in the second area 1213 to its thickness d3 in the first area 1212 can be 1 / 4 to 3 / 4. In other words, the depth of the milled groove can account for 1 / 4 to 3 / 4 of the thickness of the thinned portion 121 (for example, the thickness d1 of the main body 122 or the thickness d4 of the thinned portion 121 in the second area 1213).

[0075] It should be noted that the coated gaskets shown in the drawings and described in this specification are only a few examples of the many types of coated gaskets that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the coated gaskets shown in the drawings or described in this specification.

[0076] In summary, the coated gasket 100 proposed in the utility model includes a gasket body 110 and a baffle 120; the gasket body 110 has a gasket opening 111 whose opening direction is a first direction X; the baffle 120 is connected to the gasket body 110 and extends along the first direction X, and the end of the baffle 120 away from the gasket body 110 is provided with a thinning portion 121, and the ratio of the second thickness d2 of the thinning portion 121 to the first thickness d1 of the main body 122 is 0.2 to 1, and the thinning portion 121 has at least one buffer edge 1211; the extension direction of the buffer edge 1211 has an angle with the first direction X that is not 0, 90° and 180°, and the extension direction is parallel to the line L between the two end points of the buffer edge 1211. Through the above-mentioned structural design, the utility model improves the structure of the thinning portion 121 of the baffle 120, and sets a buffer edge 1211 on the thinning portion 121. The buffer bevel can be used to gradually transition the thinning amount of the slurry from small to large when thinning, providing sufficient time for the slurry in the un-thinned area to flow to the thinned area. The slurry away from the un-thinned area can gradually flow to the buffer edge 1211 in a gradient, thereby achieving a smoother transition effect, so that the thickness of the slurry from the un-thinned area to the thinned area tends to gradually decrease, thereby reducing the risk of cracking caused by stress concentration during drying and improving the quality of the electrode.

[0077] Based on the above detailed description of several exemplary embodiments of the coating gasket 100 proposed in the present invention, an exemplary embodiment of the coating device proposed in the present invention will be described below.

[0078] See also Fig.15 and Fig.16 , Fig.15 A three-dimensional structural schematic diagram of the coating device proposed by the utility model is representatively shown in FIG. Fig.16 A side view of the coating device is representatively shown in FIG. In this exemplary embodiment, the coating device proposed in the present invention is described by taking the coating of a pole piece as an example. It is easy for a person skilled in the art to understand that in order to apply the relevant design of the present invention to other types of coating devices, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the coating device proposed in the present invention.

[0079] like Fig.15 and Fig.16 As shown, in one embodiment of the present invention, the coating device proposed by the present invention includes the coating gasket 100 proposed by the present invention and described in detail in the above embodiments.

[0080] like Fig.15 and Fig.16As shown, in one embodiment of the present invention, the coating device provided by the present invention further includes an upper die head 200 and a lower die head 300. Specifically, the upper die head 200 and the lower die head 300 are arranged opposite to each other up and down, and the coating gasket 100 is sandwiched between the upper die head 200 and the lower die head 300, and the coating device is configured to transport the slurry to the coating gasket 100 via at least one of the upper die head 200 and the lower die head 300.

[0081] It should be noted that the coating devices shown in the drawings and described in this specification are only a few examples of many coating devices that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the coating devices shown in the drawings or described in this specification.

[0082] To sum up, the coating equipment proposed in the utility model, by adopting the coating gasket proposed in the utility model, can make the thickness of the slurry gradually decrease from the unthinned area to the thinned area, thereby reducing the risk of cracking caused by stress concentration during drying and improving the quality of the electrode.

[0083] The above describes and / or illustrates in detail the exemplary embodiments of the coating pad and coating equipment proposed by the utility model. However, the embodiments of the utility model are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical restrictions on their objects.

[0084] Although the coating pad and coating device proposed by the present invention have been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention can be modified within the spirit and scope of the claims.

Claims

1. A coated gasket, characterized in that: include: The gasket body has a gasket opening with an opening direction in a first direction; a baffle connected to the gasket body and at least partially located within the range of the gasket opening, the baffle extending along the first direction, comprising a main body portion and a thinned portion, the main body portion being connected to the gasket body, the thinned portion being connected to an end of the main body portion away from the gasket body, the ratio of a second thickness of the thinned portion to a first thickness of the main body portion being 0.2 to 1, and the thinned portion having at least one buffer edge; The extending direction of the buffer edge has an angle with the first direction that is not 0, 90° or 180°, and the extending direction is parallel to a line connecting two end points of the buffer edge.

2. The coated gasket according to claim 1, characterized in that: The second thickness of the thinned portion is smaller than the first thickness of the main body, and the buffer edge is located on a side of the thinned portion facing the gasket body.

3. The coated gasket according to claim 1, characterized in that: The second thickness of the thinned portion is equal to the first thickness of the main body, and the buffer edge is located at a side of the thinned portion away from the gasket body.

4. The coated gasket according to claim 1, characterized in that: The thinning portion includes a first area and a second area, the first area is connected to the main body, the second area is located on the side of the first area away from the gasket body, the fourth thickness of the second area is less than the third thickness of the first area, and the buffer edge is formed at the junction of the first area and the second area.

5. The coating gasket according to claim 4, characterized in that: The fourth thickness of the thinned portion in the second region is less than the first thickness of the main body; or A third thickness of the thinned portion in the first region is equal to the first thickness of the main body.

6. The coated gasket according to claim 4, characterized in that: The fourth thickness of the second region gradually decreases from the buffer edge to an edge of the second region away from the first region.

7. The coated gasket according to any one of claims 1 to 6, characterized in that: The included angle between the extending direction of the buffer edge and the first direction is 15° to 75° or 105° to 165°.

8. The coated gasket according to any one of claims 1 to 6, characterized in that: The shape of the buffer edge is a straight line, a circular arc or an elliptical arc.

9. The coated gasket according to any one of claims 1 to 6, characterized in that: The thinning portion is provided with two buffer edges, and the two buffer edges are symmetrically arranged with respect to a symmetry axis parallel to the first direction.

10. A coating device, characterized in that: A coated gasket comprising any one of claims 1 to 9.

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