Coated gaskets and coating dies

Abstract

The utility model belongs to lithium battery slurry coating technical field discloses a kind of coating gasket and coating die head. Wherein the coating gasket includes main body piece and movable piece, the main body piece one side is equipped with discharge gate, the discharge gate at least one side wall is equipped with slide, and the opening of the slide is towards the discharge gate setting, the movable piece is slidably inserted in the slide via the opening of the slide, the movable piece with the main body piece surface flush, the size of discharge gate can be accurately controlled, ensure that slurry cannot flow from gap, to ensure good coating effect. By adjusting the position of movable piece on main body piece, the coating width can be changed, so that different models of gasket do not need to be replaced, effectively simplifying the pole piece coating width adjustment process, improving the convex portion size adjustment efficiency, saving cost. In addition, by setting the opening of the slide towards the discharge gate, the movable piece as a whole can be accommodated in the slide, thereby helping to reduce the volume and manufacturing complexity of the movable piece, with simple structure.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery slurry coating technology, and in particular to a coating pad and a coating die. Background Technology

[0002] Battery electrodes are the core components for energy conversion in various batteries, primarily serving three core functions: carrier of active materials, current conduction, and medium for electrochemical reactions. They mainly consist of a current collector and an active material layer. During preparation, an active material slurry is typically coated onto the current collector using a coating die, and the electrode is formed after the slurry dries.

[0003] The shims in the coating die head are used to control the coating width. Currently, during coating debugging and production, the coating width is generally adjusted by replacing the shims. One shim usually corresponds to one size model. As the number of models increases, the procurement cost increases.

[0004] Therefore, there is an urgent need for a coating pad and coating die to solve the problems of cumbersome coating width adjustment process and high material cost in the existing technology. Utility Model Content

[0005] The purpose of this utility model is to provide a coating pad and a coating die head, which have a simple structure and reasonable design, can simplify the coating width adjustment process, improve the size adjustment efficiency, and effectively control the cost of consumables, so as to solve the problems of cumbersome coating width adjustment process and high consumable cost in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A coating pad includes a main sheet and a movable sheet. The main sheet has a discharge port on one side, and a slide is provided on at least one side wall of the discharge port. The opening of the slide faces the discharge port. The movable sheet is slidably inserted into the slide through the opening of the slide and is flush with the surface of the main sheet.

[0008] Preferably, the slide rail has a groove on at least one side wall, and the length direction of the groove is parallel to the length direction of the slide rail; the movable piece includes a main body and a guide part, the main body has the guide part on at least one side wall, the main body is disposed in the slide rail, the guide part is slidably inserted into the groove, and the surface of the main body is flush with the surface of the main piece.

[0009] Preferably, the main body has a first chamfer on the feed side near the discharge port.

[0010] Preferably, the guide portion has a second chamfer on the feed side near the discharge port.

[0011] Preferably, the movable piece has a blocking part protruding from one end facing the discharge port. The blocking part is disposed opposite to the side wall of the discharge port, and when the movable piece retracts into the slide, the blocking part can stop against the side wall of the discharge port.

[0012] Preferably, the surface of the movable piece is provided with marking lines arranged along the length of the slide.

[0013] Preferably, the width of the feed side of the discharge port is equal to the width of the discharge side of the discharge port.

[0014] Preferably, the main body includes a base, two flow-blocking portions, and two ear portions. The two flow-blocking portions are disposed opposite each other on the same side of the base. The ear portions are respectively provided on the opposite sides of the two flow-blocking portions. The ear portions are spaced apart from the base, and the gap between the ear portions and the base forms a material passage. The space between the two ear portions forms the discharge port. The discharge port is connected to the material passage, and at least one ear portion is slidably fitted with the movable piece at the end opposite to the discharge port.

[0015] A coating die head includes a feeding die head, a pressing die head, and the aforementioned coating pad. The coating pad is sandwiched between the feeding die head and the pressing die head. The feeding die head has a feeding port and a discharge chamber. The feeding port is connected to the discharge chamber and is used to connect to a feeding component. The discharge chamber is located on the side of the feeding die head that abuts against the coating pad and is connected to the discharge port of the coating pad.

[0016] Preferably, the coating die head further includes a hinge, with its two ends connected to the feeding die head and the pressing die head respectively, so that the feeding die head and the pressing die head can rotate and open around the hinge.

[0017] The beneficial effects of this utility model are:

[0018] The coating pad and coating die provided by this utility model, by making the surface of the movable piece flush with the surface of the main piece, ensures that when the coating pad is assembled between the feeding die and the pressing die, there are no gaps between the upper and lower surfaces of the movable piece and the feeding die and the pressing die. This allows for precise control of the outlet size, ensuring that the slurry does not flow out from the gaps, thus guaranteeing a good coating effect. In practical use, by adjusting the position of the movable piece on the main piece, the width of the outlet can be changed, thereby changing the coating width. This eliminates the need to replace different types of pads, effectively simplifying the electrode coating width adjustment process, improving the efficiency of adjusting the protrusion size, and saving costs. Furthermore, by setting the opening of the slide rail towards the outlet, the movable piece can be accommodated entirely within the slide rail, which helps to reduce the volume and manufacturing complexity of the movable piece, resulting in a simple structure and facilitating the use of the coating pad and the coating die with it. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the coating die head provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the feeding die head provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the coated gasket provided by this utility model;

[0022] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0023] In the picture:

[0024] 10. Coating gasket; 20. Feeding die head; 21. Discharge chamber; 22. Feed port; 30. Pressing die head; 40. Hinge; 41. Hinge right-angle block; 42. Transmission right-angle block;

[0025] 11. Main body piece; 1101. Discharge port; 1102. Slide rail; 1103. Material passage; 1104. Mounting hole; 1105. Slide groove; 111. Base; 112. Baffle; 113. Ear piece;

[0026] 12. Moving piece; 121. Main body; 1211. First chamfer; 122. Guide part; 1221. Second chamfer; 123. Blocking part; 124. Marking line. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] The manufacturing process of lithium-ion battery electrodes includes a coating step. During preparation, an active material slurry is typically coated onto a current collector using a coating die. After the slurry dries, the electrode is formed. The coating die includes a coating pad 10, which is used to control the coating width. Currently, during coating debugging and production, the coating width is generally adjusted by replacing the pads. Each pad typically corresponds to a specific size and model; as the number of models increases, procurement costs rise.

[0032] Therefore, the coating die head provided in this embodiment can effectively simplify the coating width adjustment process, improve the coating size adjustment efficiency, and effectively control consumable costs. Combined with... Figures 1 to 4 As shown, the coating die head provided in this embodiment includes a feeding die head 20, a pressing die head 30, and a coating pad 10. The coating pad 10 can be sandwiched between the feeding die head 20 and the pressing die head 30.

[0033] Because the coating pad 10 has a certain thickness, a discharge gap can be formed between the feeding die head 20, the pressing die head 30 and the coating pad 10. The feeding die head 20 has a discharge cavity 21 for accommodating the slurry on one side for abutting the coating pad 10. The discharge cavity 21 is connected to the discharge gap, and a feeding port 22 connected to the discharge cavity 21 is opened on one side of the feeding die head 20. The feeding port 22 can connect the discharge cavity 21 to the feeding device so that the slurry can flow through the feeding die head 20 and be stored in the discharge cavity 21. Applying a certain pressure to the discharge cavity 21 can squeeze the slurry out from the discharge gap.

[0034] Optionally, the materials for the feeding die head 20, the pressing die head 30, and the coating gasket 10 can be any one of aluminum, copper, stainless steel, or alloy.

[0035] like Figure 3 , Figure 4 As shown, the coating pad 10 includes a main body 11 and a movable piece 12. The main body 11 has a discharge port 1101 on one side. At least one side wall of the discharge port 1101 has a slide rail 1102, with the opening of the slide rail 1102 facing the discharge port 1101. The slide rail 1102 extends along the X-axis. The movable piece 12 is slidably inserted into the slide rail 1102 through the opening, allowing the width of the discharge port 1101 along the X-axis to be adjusted by changing the length of the movable piece 12 extending out of the slide rail 1102. Furthermore, the movable piece 12 is flush with the surface of the main body 11, ensuring that when the coating pad 10 is assembled between the feeding die head 20 and the pressing die head 30, there are no gaps between the upper and lower surfaces of the movable piece 12 and the feeding die head 20 and pressing die head 30. This allows for precise control of the size of the discharge port 1101, ensuring that the slurry does not flow out from the gaps and thus guaranteeing a good coating effect.

[0036] In practical use, the coating pad 10 described above can change the width of the discharge port 1101 by adjusting the position of the movable piece 12 on the main body piece 11, thereby changing the coating width. This eliminates the need to replace pads of different models, effectively simplifying the electrode coating width adjustment process, improving the efficiency of protrusion size adjustment, and saving costs. Furthermore, by setting the opening of the slide 1102 towards the discharge port 1101, the movable piece 12 can be fully accommodated within the slide 1102, which helps to reduce the volume and manufacturing complexity of the movable piece 12, resulting in a simple structure.

[0037] In some embodiments, reference is made to Figure 3As shown, the main body 11 includes a base 111, two flow-blocking portions 112, and two ear portions 113. The two flow-blocking portions 112 are arranged opposite each other on the same side of the base 111 along the X-axis and extend along the Y-axis. Ear portions 113 protrude from the opposite sides of the two flow-blocking portions 112, extending along the X-axis and spaced apart from the base 111. The gap between the ear portions 113 and the base 111 forms a material passage 1103 extending along the X-axis. The space between the two ear portions 113 forms a discharge port 1101, which is connected to the material passage 1103. In this embodiment, the material passage 1103 is connected to the discharge chamber 21, allowing the slurry extruded from the discharge chamber 21 to be input into the discharge port 1101 through the material passage 1103. Preferably, the extension length of the material passage 1103 is equal to the extension length of the discharge chamber 21, so as to avoid creating resistance to the flow of slurry and thus improve the slurry discharge efficiency.

[0038] Furthermore, in this embodiment, each of the two ear pieces 113 is provided with a slide rail 1102 at the end opposite to the discharge port 1101, so that a movable piece 12 is slidably fitted in each of the two ear pieces 113. By adjusting the width of the discharge port 1101 by moving the two movable pieces 12 closer to or further away from each other, it can be ensured that the central axis of the discharge port 1101 will not be offset, and the discharge will be more uniform.

[0039] Furthermore, in this embodiment, the width of the feed side of the discharge port 1101 and the width of the discharge side of the discharge port 1101 are equal (see reference). Figure 3 In the middle, the side closer to the material passage 1103 along the Y-axis is the feeding side of the discharge port 1101, and the side farther away from the material passage 1103 is the discharge side of the discharge port 1101. This ensures that the force on the movable piece 12 is uniform at all points during discharge, avoids uneven force over a long period of time which may cause the movable piece 12 to tilt and be damaged, thereby improving the service life of the movable piece 12.

[0040] In this embodiment, the base 111 is provided with a plurality of mounting holes 1104, which are used to install the coating pad 10 between the feeding die head 20 and the pressing die head 30. It should be noted that the specific number and distribution of the mounting holes 1104 can be reasonably set according to the structure of the corresponding feeding die head 20 and pressing die head 30, and are not limited here.

[0041] In some embodiments, reference is made to Figure 4As shown, the slide 1102 has at least one side wall with a groove 1105, the length direction of which is parallel to the length direction of the slide 1102. The movable piece 12 includes a main body 121 and a guide part 122. The main body 121 has at least one side wall with a guide part 122. The main body 121 is disposed in the slide 1102, and the guide part 122 is slidably inserted into the groove 1105. The surface of the main body 121 is flush with the surface of the main piece 11 to ensure that after the coating pad 10 is assembled between the feeding die head 20 and the pressing die head 30, there will be no gap between the upper and lower surfaces of the main body 121 and the feeding die head 20 and the pressing die head 30. Through the above arrangement, the groove 1105 can limit the movement direction of the movable piece 12. For example, the main body 121 has guide portions 122 on both opposite side walls along the Y-axis. The guide portions 122 are elongated thin sheet structures extending along the X-axis. The guide portions 122 correspond one-to-one with the slide grooves 1105, so that when the main body 121 slides in the slide 1102, the guide portions 122 can be limited to move along the X-axis. Thus, the guide portions 122 and the slide grooves 1105 improve the smoothness of the movement of the main body 121, the movable piece 12 and the main body piece 11 are more compact, and the connection structure between the movable piece 12 and the main body piece 11 is also simplified.

[0042] In some embodiments, a first chamfer 1211 is provided on the feed side of the main body 121 near the discharge port 1101. The first chamfer 1211 can remove the sharp part of the main body 121, reduce the impact force between the slurry and the main body 121 when the slurry flows out, and prevent phenomena such as material accumulation, jamming, and flow disturbance at the end of the main body 121, so as to guide the slurry to slide out of the discharge port 1101 naturally and make the slurry flow out more smoothly.

[0043] In some embodiments, a second chamfer 1221 is provided on the feed side of the guide portion 122 near the discharge port 1101. The second chamfer 1221 can remove the sharp part of the guide portion 122, which can further weaken the shearing effect of the guide portion 122 on the slurry, and further reduce the risk of slurry sticking, stringing, and backflow vortex at the end of the guide portion 122. The first chamfer 1211 and the second chamfer 1221 together form a continuous transition surface, so that there are no abrupt changes and no additional resistance in the entire flow path of the slurry, and the slurry leaves the discharge port 1101 more smoothly.

[0044] It should be noted that the chamfer angles of the first chamfer 1211 and the second chamfer 1221 are not limited in this utility model. For example, for low-viscosity, high-flow-rate slurries, the chamfer angle can be appropriately increased to further reduce the resistance to the slurry and allow it to slide out of the discharge port 1101 more quickly. For high-viscosity, low-flow-rate slurries, the chamfer angle can be appropriately decreased to form a gentler slope, gradually guiding the viscous slurry to change its flow direction and avoiding the accumulation of slurry at the chamfer due to excessive angle, thereby ensuring that it can flow out of the discharge port 1101 smoothly.

[0045] Furthermore, in this embodiment, a blocking portion 123 protrudes from one end of the main body 121 facing the discharge port 1101. The blocking portion 123 is disposed on the end sidewall of the main body 121 away from the base 111, so that the main body 121 and the blocking portion 123 can form an L-shaped cross-section structure after being connected. The main body 121 and the blocking portion 123 are preferably integrally formed and fixedly connected. The blocking portion 123 is disposed opposite to the sidewall of the discharge port 1101, and when the movable piece 12 retracts into the slide rail 1102, the blocking portion 123 can abut against the sidewall of the discharge port 1101, thereby preventing the main body 121 from being completely retracted into the slide rail 1102 and reducing the time spent pulling out the main body 121.

[0046] In some embodiments, the surface of the movable piece 12 is provided with marking lines 124 arranged along the length of the slide 1102.

[0047] In this embodiment, one of the guide portions 122 is provided with a marker line 124 along the X-axis. The marker line 124 includes an indicator scale, which facilitates the adjustment of the position of the guide portion 122 according to the indicator scale, thereby facilitating the adjustment of the length of the movable piece 12 extending out of the slide 1102, making the adjustment and control of the coating width more precise.

[0048] refer to Figure 1 As shown, the coating die head provided in this embodiment also includes a hinge 40. The two ends of the hinge 40 are respectively connected to the feeding die head 20 and the pressing die head 30, so that the feeding die head 20 and the pressing die head 30 can be rotated and opened around the hinge 40, which facilitates the disassembly and assembly of the coating pad 10.

[0049] Specifically, please refer to Figure 1As shown, the hinge 40 includes a hinge right-angle block 41 and a transmission right-angle block 42. The hinge right-angle block 41 is L-shaped, with one end fixedly connected to the feeding die head 20 and the other end rotatably pivotally connected to the transmission right-angle block 42. The end of the transmission right-angle block 42 away from the hinge right-angle block 41 is fixedly connected to the pressing die head 30, allowing the pressing die head 30 to rotate and open around the hinge right-angle block 41. Optionally, the hinge right-angle block 41 and the transmission right-angle block 42 in the hinge 40 can be made of the same material as the pressing die head 30 and the feeding die head 20, such as aluminum, copper, stainless steel, or alloy, to ensure high structural strength of the hinge 40.

[0050] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A coated gasket, characterized in that, The device includes a main body piece (11) and a movable piece (12). The main body piece (11) has a discharge port (1101) on one side. The discharge port (1101) has a slide (1102) on at least one side wall. The opening of the slide (1102) faces the discharge port (1101). The movable piece (12) is slidably inserted into the slide (1102) through the opening of the slide (1102). The movable piece (12) is flush with the surface of the main body piece (11).

2. The coated gasket according to claim 1, characterized in that, The slide rail (1102) has at least one side wall provided with a groove (1105), and the length direction of the groove (1105) is parallel to the length direction of the slide rail (1102); the movable piece (12) includes a main body (121) and a guide part (122). The main body (121) has at least one side wall provided with the guide part (122). The main body (121) is disposed in the slide rail (1102). The guide part (122) is slidably limited and inserted into the groove (1105). The surface of the main body (121) is flush with the surface of the main piece (11).

3. The coated gasket according to claim 2, characterized in that, The main body (121) has a first chamfer (1211) on the feed side near the discharge port (1101).

4. The coated gasket according to claim 2, characterized in that, The guide section (122) has a second chamfer (1221) on the feed side near the discharge port (1101).

5. The coated gasket according to claim 1, characterized in that, The movable piece (12) has a blocking part (123) protruding from one end facing the discharge port (1101). The blocking part (123) is arranged opposite to the side wall of the discharge port (1101), and when the movable piece (12) retracts into the slide (1102), the blocking part (123) can stop against the side wall of the discharge port (1101).

6. The coated gasket according to claim 1, characterized in that, The surface of the movable piece (12) is provided with marking lines (124) arranged along the length direction of the slide (1102).

7. The coated gasket according to claim 1, characterized in that, The width of the feed side of the discharge port (1101) is equal to the width of the discharge side of the discharge port (1101).

8. The coated gasket according to any one of claims 1-7, characterized in that, The main body piece (11) includes a base (111), two flow-blocking parts (112) and two ear pieces (113). The two flow-blocking parts (112) are disposed opposite each other on the same side of the base (111). The ear pieces (113) are respectively provided on the opposite sides of the two flow-blocking parts (112). The ear pieces (113) are spaced apart from the base (111), and the gap between the ear pieces (113) and the base (111) forms a material passage (1103). The space between the two ear pieces (113) forms the discharge port (1101). The discharge port (1101) is connected to the material passage (1103), and at least one ear piece (113) is slidably fitted with the movable piece (12) at the end opposite to the discharge port (1101).

9. A coating die head, characterized in that, The device includes a feeding die (20), a pressing die (30), and a coating pad (10) according to any one of claims 1-8. The coating pad (10) is sandwiched between the feeding die (20) and the pressing die (30). The feeding die (20) is provided with a feeding port (22) and a discharge chamber (21). The feeding port (22) is connected to the discharge chamber (21). The feeding port (22) is used to connect to a feeding component. The discharge chamber (21) is provided on one side of the feeding die (20) that abuts against the coating pad (10). The discharge chamber (21) is connected to the discharge port (1101) of the coating pad (10).

10. The coating die head according to claim 9, characterized in that, The coating die head also includes a hinge (40), the two ends of which are connected to the feeding die head (20) and the pressing die head (30) respectively, so that the feeding die head (20) and the pressing die head (30) can rotate and open around the hinge (40).

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