Coating gasket and coating die head

Abstract

The utility model provides a coating gasket and a coating die head. The coating gasket comprises a U-shaped gasket main body, the U-shaped gasket main body comprises a transversely arranged long edge and two side edges formed by upwards extending the left end and the right end of the long edge, and a containing cavity with an opening in the top is defined by the long edge and the side edges; the two adjusting pieces are in a long strip shape and are arranged on the tops of the side edges in a sliding mode respectively. The adjusting piece is provided with a thinned end close to the containing cavity, and the thinned end has a first state in which the thinned end coincides with the edge of the side edge and a second state in which the thinned end extends into the containing cavity. And when each adjusting sheet slides transversely in a drivable manner, the thinned end is switched between a first state and a second state. According to the coating gasket disclosed by the utility model, the adjusting piece is arranged at the top of the side edge of the gasket main body, and the adjusting piece is movably arranged, so that the thinned end of the adjusting piece can extend into the accommodating cavity, the thinned effect can be adjusted, and the universality of the coating gasket is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and particularly relates to a coating gasket. The utility model also relates to a coating die head provided with the above coating gasket. Background Technique

[0002] At the present stage, the country is comprehensively developing new energy vehicles powered by lithium-ion batteries. The quality of lithium-ion batteries is crucial for the quality of new energy vehicles. In the production process of lithium-ion batteries, the coating of the electrode sheet is an essential process, and the quality of the electrode sheet coating directly affects the consistency and safety of the battery capacity.

[0003] The electrode sheet is usually coated by an extrusion coater. There is a receiving cavity in the die head of the extrusion coater that can hold the slurry. When the slurry enters the extrusion coater from the middle of the receiving cavity, the slurry is evenly coated on the substrate under a certain pressure and then dried to make a battery.

[0004] After the slurry is coated on the cloth and foil material that makes up the electrode sheet, since the exposed area of the slurry on the side is large and it volatilizes faster, it will dry out faster, resulting in the slurry forming a bulging edge on the side under the action of surface tension. Therefore, when coating the slurry, a thinning treatment is required. The current thinning measure is to open a chamfer at the slurry outlet of the gasket, so that the width of the slurry when it is extruded from the die head increases. Or a thinning structure is provided on the main body of the coating gasket to achieve the thinning effect.

[0005] In the prior art, the coating gasket usually includes a main body that limits the coating width and a thinning feature part for thinning, and the two are of an integral structure. This results in that when coating electrode sheets with different requirements for the thinning effect, that is, the thinning amount, it is necessary to replace the coating gasket that matches the above electrode sheet as a whole to ensure that the thinning effect meets the requirements, thus resulting in poor versatility of the coating gasket. Summary of the Utility Model

[0006] In view of this, the utility model aims to propose a coating gasket that can adjust the thinning effect, thereby improving the versatility of the coating gasket.

[0007] To achieve the above object, the technical solution of the utility model is realized as follows:

[0008] A coating gasket, comprising: a sheet body in a "concave" shape, including a long side arranged horizontally, and two side edges extending upward from the left and right ends of the long side, the long side and the side edges enclosing a receiving cavity with an open top; two adjusting sheets, the adjusting sheets are strip-shaped and are respectively slidably arranged on the tops of the side edges; the adjusting sheets have thinned ends close to the receiving cavity, the thinned ends have a first state coinciding with the edges of the side edges, and a second state extending into the receiving cavity; when each adjusting sheet is driven to slide horizontally, the thinned ends switch between the first state and the second state.

[0009] Further, a receiving groove is formed by the top end of the side edge recessing downward; the receiving groove penetrates the horizontal two sides of the side edge, and the adjusting sheet is slidably arranged in the receiving groove.

[0010] Further, the adjusting sheet has an adjusting end away from the receiving cavity; a clamping portion is arranged on the adjusting end, and the clamping portion is used for clamping into a clamping block; when the clamping block is clamped into the clamping portion, the distance that the thinned end of the adjusting sheet extends into the receiving cavity is fixed.

[0011] Further, the clamping portion includes a clamping groove formed by the length side of the adjusting sheet recessing; the clamping block includes a vertical plate for clamping into the clamping groove, and a horizontal plate connecting the vertical plate; the horizontal plate can be lapped on the adjusting sheet.

[0012] Further, the clamping grooves are configured to be multiple and arranged at intervals along the length direction of the adjusting sheet.

[0013] Further, the width of the clamping groove and the sum L1 of the distances between adjacent two clamping grooves satisfy: 0.75mm ≤ L1 ≤ 1.25mm.

[0014] Further, chamfers are arranged on the tops of the side edges and the thinned ends; in the first state, the chamfers on the thinned ends coincide with the chamfers on the side edges.

[0015] Further, the coating gasket is made of a stainless steel sheet, and the thickness L2 of the coating gasket satisfies: 0.3mm ≤ L2 ≤ 1.1mm.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] For the coating gasket described in the present utility model, by providing an adjusting piece at the top of the side of the piece body and through the movable setting of the adjusting piece, the thinning end of the adjusting piece can extend into the accommodating cavity, which can generate turbulent flow to the slurry through the thinning end, and at the same time reduce the discharging gaps on both sides of the accommodating cavity, improve the thinning effect at the coating edge, and at the same time realize the adjustment of the thinning effect, thereby improving the versatility of the coating gasket.

[0018] A receiving groove is provided at the top of the side, so that the adjusting piece can be stably held at the top of the side and realize lateral sliding, so that the thinning end can extend into the receiving groove, which is beneficial to realizing the sliding setting of the adjusting piece and improving the reliability of the adjusting piece.

[0019] The adjusting piece has an adjusting end, which is beneficial to driving the sliding of the adjusting end. At the same time, a clamping portion is provided on the adjusting end. Through the clamping cooperation between the clamping portion and the clamping block, the adjusting piece can be fixed to ensure the thinning effect at the slurry edge.

[0020] A groove is formed on the adjusting piece, and the vertical plate of the clamping block can be clamped into the groove to limit the sliding of the adjusting piece, thereby realizing the fixing of the thinning end.

[0021] The clamping grooves are configured to be multiple and arranged at intervals along the length direction of the adjusting piece. When the distances that the thinning ends extend into the accommodating cavity are different, the clamping blocks can be clamped into the corresponding clamping grooves, thereby fixing the thinning ends and keeping the distances that the thinning ends extend into the accommodating cavity fixed.

[0022] The width of the clamping groove and the sum L1 of the distances between two adjacent clamping grooves satisfy: 0.75 mm ≤ L1 ≤ 1.25 mm. It can ensure that the fixed distance of each movement of the thinning end is constant, so as to quantitatively adjust the extending distance of the thinning end through the clamping of the clamping groove and the clamping block.

[0023] Chamfers are provided at the top of each side and on each thinning end, so that the slurry on both sides diffuses when the slurry changes from narrow to wide, and the bulging edges on the sides of the slurry coating are effectively reduced, further improving the thinning effect.

[0024] The coating gasket is made of a stainless steel plate, and the thickness L2 of the coating gasket satisfies: 0.3 mm ≤ L2 ≤ 1.1 mm. While ensuring the structural strength of the coating gasket, it can reduce the weight of the piece body and is convenient for processing and design.

[0025] Another object of the present utility model is to provide a coating die head, including an upper die head and a lower die head. The coating die head further includes the coating gasket as described above clamped between the upper die head and the lower die head.

[0026] The coating die head and / or the coating gasket described in the present utility model have the same technical means as the prior art and will not be elaborated herein. Description of the Drawings

[0027] The attached drawings that form a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the attached drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the coating gasket according to the first embodiment of the present utility model;

[0029] Figure 2 It is a partial structural schematic diagram of the adjusting piece loaded on the side according to the first embodiment of the present utility model;

[0030] Figure 3 It is an exploded view of the adjusting piece loaded on the side according to the first embodiment of the present utility model;

[0031] Figure 4 It is a schematic diagram of the thinned end in the first state according to the first embodiment of the present utility model;

[0032] Figure 5 It is a schematic diagram of the thinned end in the second state according to the first embodiment of the present utility model;

[0033] Explanation of reference numerals:

[0034] 1. Long side;

[0035] 2. Side; 201. Receiving groove;

[0036] 3. Receiving cavity;

[0037] 4. Adjusting piece; 401. Thinned end; 402. Adjusting end; 403. Card slot;

[0038] 5. Clamping block; 501. Vertical plate; 502. Horizontal plate; 503. Connecting portion;

[0039] 6. Chamfer. Detailed implementation manners

[0040] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0041] In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0042] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0044] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0045] Embodiment 1

[0046] This embodiment relates to a coating gasket for coating the foil material that makes up the electrode sheet. In terms of the overall structure, as Figure 1 , Figure 2 , Figure 3 shown, the coating gasket of this embodiment includes a sheet body in a "concave" shape and two adjusting sheets 4.

[0047] Among them, the sheet body includes a long side 1 arranged horizontally and two side edges 2 extending upward from the left and right ends of the long side 1. The long side 1 and the side edges 2 enclose a receiving cavity 3 with an open top. When the coating gasket of this embodiment is installed on the coating die head, the receiving cavity 3 can hold the slurry, so that the slurry flows out from the opening and is coated on the foil material.

[0048] At the same time, the adjusting sheet 4 is in a long strip shape and is respectively slidably arranged on the top of each side edge 2. The adjusting sheet 4 has a thinned end 401 close to the receiving cavity 3. The thinned end 401 has a first state that coincides with the edge of the side edge 2 and a second state that extends into the receiving cavity 3. When each adjusting sheet 4 is driven to slide horizontally, the thinned end 401 switches between the first state and the second state.

[0049] It can be understood that after the slurry is coated on the foil, due to the large exposed area and fast volatilization of the slurry on the side edge 2, the side edge 2 of the slurry is prone to form a bulging edge phenomenon under the action of its surface tension during the drying process of the slurry edge. When the thinning end 401 is in the second state, the thinning end 401 of the adjusting piece 4 extends into the accommodating cavity 3, so that the discharging gaps on both sides of the accommodating cavity 3 are reduced. At the same time, the thinning end 401 can generate a turbulent flow for the slurry flowing through both sides of the accommodating cavity 3, thereby reducing the slurry flowing to both sides of the accommodating cavity 3. As a result, during the coating process, the slurry at both side edges 2 of the foil becomes thinner, thus improving the thinning effect of the coating edge. At the same time, by changing the distance that the thinning end 401 of the adjusting piece 4 extends into the accommodating cavity 3, the adjustment of the thinning thickness and the thinning width of the slurry coating edge is realized. Therefore, the coating gasket of this embodiment can adjust the thinning effect according to the slurry with different characteristic parameters.

[0050] As described above, by providing the adjusting piece 4 at the top of the side edge 2 of the piece body and through the movable setting of the adjusting piece 4, the thinning end 401 of the adjusting piece 4 can extend into the accommodating cavity 3. The thinning end 401 can generate a turbulent flow for the slurry, and at the same time, the discharging gaps on both sides of the accommodating cavity 3 are reduced, improving the thinning effect of the coating edge. At the same time, the adjustment of the thinning effect is realized, thereby improving the versatility of the coating gasket.

[0051] Based on the above overall introduction, specifically, in the second state, the greater the distance that the thinning end 401 of the adjusting edge of this embodiment extends into the accommodating cavity 3, the smaller the discharging gaps on both sides of the accommodating cavity 3, so that the greater the thinning thickness and the thinning width of the slurry coating edge. And the smaller the distance that the thinning end 401 of the adjusting edge extends into the accommodating cavity 3, the smaller the discharging gaps on both sides of the accommodating cavity 3, so that the smaller the thinning thickness and the thinning width of the slurry coating edge. In the first state, the thinning end 401 coincides with the edge of the side edge 2, and the thinning end 401 does not extend into the accommodating cavity 3. At this time, the thinning end 401 does not have a thinning effect on the slurry.

[0052] To facilitate the sliding setting of the adjusting piece 4 on the top of the side edge 2, as Figure 2 、 Figure 3 shown, the top end of the side edge 2 of this embodiment is recessed downward to form an accommodating groove 201. The accommodating groove 201 penetrates the lateral sides of the side edge 2, and the adjusting piece 4 is slidably arranged in the accommodating groove 201. Through the setting of the accommodating groove 201, the adjusting piece 4 can be stably held on the top of the side edge 2 and realize lateral sliding, so that the thinning end 401 can extend into the accommodating groove 201, thus facilitating the sliding setting of the adjusting piece 4 and improving the reliability of the adjusting piece 4.

[0053] To facilitate driving the sliding of the adjusting piece 4, as Figure 2 、 Figure 3As shown in the figure, to ensure the thinning effect on the edge of the slurry, the adjusting piece 4 of this embodiment has an adjusting end 402 away from the accommodating cavity 3. A clamping portion is provided on the adjusting end 402, and this clamping portion is used to clamp into a clamping block 5. When the clamping block 5 is clamped into the clamping portion, the distance that the thinning end 401 of the follower adjusting piece 4 extends into the accommodating cavity 3 is fixed. Specifically, in the first state, the adjusting end 402 extends out of the outside of the piece body. By driving the adjusting end 402, the lateral sliding of the adjusting piece 4 is realized. In specific implementation, since in the actual production process, a fixed thinning effect on the edge of the slurry is adopted during one coating process, the distance that the thinning end 401 of the adjusting piece 4 extends into the accommodating cavity 3 does not need to be adjusted in real time. Therefore, in order to simplify the structural design and facilitate operation, the adjusting end 402 can be driven by manual operation to ensure that the adjusting piece 4 can be driven to slide laterally. Of course, a conventional driving mechanism can also be used, as long as it can be connected to the adjusting end 402 and drive the adjusting piece 4 to slide laterally.

[0054] In addition, through the clamping cooperation setting of the clamping portion and the clamping block 5, the adjusting piece 4 can be fixed to prevent the slurry from pushing against the thinning end 401 during the coating process and causing the adjusting piece 4 to move, resulting in the change of the thinning effect, thereby ensuring the thinning effect on the edge of the slurry.

[0055] To facilitate the clamping cooperation between the clamping block 5 and the clamping portion, as Figure 3 shown, the clamping portion of this embodiment includes a card slot 403 formed by the depression of the length side of the adjusting piece 4. The clamping block 5 includes a vertical plate 501 for clamping into the card slot 403 and a horizontal plate 502 connected to the vertical plate 501, and the horizontal plate 502 can overlap on the adjusting piece 4. Through the setting of the card slot 403, the vertical plate 501 of the clamping block 5 can be inserted into the card slot 403 to limit the sliding of the adjusting piece 4, thereby realizing the fixation of the thinning end 401.

[0056] In specific implementation, the clamping block 5 is arranged on the coating die head or other fixed structures and does not move with the adjusting piece 4. And it can slide along the extending direction of the card slot 403 or move along the thickness direction of the adjusting piece 4. When the clamping block 5 moves, the vertical plate 501 can be smoothly inserted into the card slot 403, and through the abutment of the horizontal plate 502 and the adjusting piece 4, the clamping block 5 is kept on the adjusting piece 4. At the same time, a connecting portion 503 is provided on the horizontal plate 502 of the clamping block 5, which can be manually operated to be clamped into the card slot 403. Of course, a conventional driving mechanism can also be connected to the connecting portion 503 to drive the clamping block 5 to be clamped into the card slot 403 to realize the fixation of the thinning end 401.

[0057] To further improve the fixing effect on the adjusting piece 4, as Figure 3As shown, the card slots 403 of this embodiment are configured as multiple ones arranged at intervals along the length direction of the adjusting piece 4. By providing multiple card slots 403, when the distances that the thinned end 401 extends into the accommodating cavity 3 are different, the clamping block 5 can be clamped into the corresponding card slot 403, thereby fixing the thinned end 401 and keeping the distance that the thinned end 401 extends into the accommodating cavity 3 fixed. It can be understood that when the thinned end 401 extends into the accommodating cavity 3 by a certain distance, in order to fix the thinned end 401 and the adjusting piece 4, the clamping block 5 can be clamped into the card slot 403 adjacent to the piece body, thereby fixing the extending distance of the thinned end 401. In specific implementation, the card slots 403 in this embodiment are provided as three. The card slot 403 closest to the edge of the piece body is used to fix the adjusting piece 4 in the first state, while the other two card slots 403 are used to adjust the distance that the thinned end 401 extends into the accommodating cavity 3 in the second state. Of course, the number of card slots 403 can be set differently according to the required extending distance range of the thinned end 401, as long as the fixing of the adjusting piece 4 can be ensured.

[0058] To facilitate the adjustment of the coating thinning effect on the edge of the slurry, as Figure 4 , Figure 5 shown, the width of the card slot 403 in this embodiment and the sum L1 of the distances between two adjacent card slots 403 satisfy: 0.75 mm ≤ L1 ≤ 1.25 mm. It can be understood that, as Figure 5 shown, in the second state, when the adjusting piece 4 further extends into the accommodating cavity 3 and the clamping block 5 is clamped from one card slot 403 into another card slot 403, the thinned end 401 moves a distance equal to the width of one card slot 403 and the distances between two adjacent card slots 403. Therefore, by setting L1 to satisfy 0.75 mm ≤ L1 ≤ 1.25 mm, it can be ensured that the thinned end 401 moves a fixed distance each time, so that the extending distance of the thinned end 401 can be quantitatively adjusted by the clamping connection between the card slot 403 and the clamping block 5. In specific implementation, L1 in this embodiment is 1 mm, that is, the thinned end 401 moves 1 mm each time. Other values can also be adopted, such as 0.75 mm, 0.85 mm, 0.95 mm, 1.05 mm, 1.25 mm, etc., as long as the requirements are met, and no limitation is made here.

[0059] To further improve the thinning effect, as Figure 1 , Figure 2 , Figure 3 shown, chamfers 6 are provided at the tops of the respective side edges 2 and on the respective thinned ends 401 of this embodiment. In the first state, the chamfers 6 on the thinned ends 401 coincide with the chamfers 6 on the side edges 2. By providing the chamfers 6, the slurry will experience a process of changing from narrow to wide at the chamfers 6, so that the slurry on both sides diffuses when changing from narrow to wide, and the bulging of the side edges 2 where the slurry is coated is effectively reduced, realizing the thinning of the bulging edge, thereby further improving the thinning effect.

[0060] To ensure the structural strength of the coating gasket in this embodiment, as Figure 2 shown, the coating gasket in this embodiment is made of stainless steel sheet, and the thickness L2 of the coating gasket satisfies: 0.3 mm ≤ L2 ≤ 1.1 mm. While ensuring the structural strength of the coating gasket, it can reduce the weight of the gasket body and facilitate processing and design. In specific implementation, the thickness L2 of the coating gasket in this embodiment can be selected as 0.6 mm. Of course, other values within this range can also be selected for the thickness of the coating gasket, and no specific limitation is made here.

[0061] In summary, for the coating gasket in this embodiment, by arranging the adjusting piece 4 at the top of the side 2 of the gasket body and through the movable arrangement of the adjusting piece 4, the thinning end 401 of the adjusting piece 4 can extend into the accommodating cavity 3, and the thinning end 401 can generate turbulent flow for the slurry, while reducing the discharge gaps on both sides of the accommodating cavity 3, improving the thinning effect at the coating edge, and at the same time realizing the adjustment of the thinning effect, thereby improving the versatility of the coating gasket and having good usability.

[0062] Embodiment 2

[0063] This embodiment relates to a coating die head for coating slurry on the foil material forming the electrode sheet. In terms of the overall structure, the coating die head in this embodiment includes an upper die head and a lower die head, and also includes the coating gasket as described in Embodiment 1 clamped between the upper die head and the lower die head.

[0064] Through the arrangement of the above-mentioned coating gasket, the coating die head in this embodiment improves the thinning effect at the coating edge and enhances the versatility of the coating die head.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coating gasket, characterized in that, Comprising: A sheet body in a "concave" shape, including a long side arranged horizontally, and two side edges extending upward from the left and right ends of the long side, the long side and the side edges enclosing a receiving cavity with an open top; Two adjusting sheets, the adjusting sheets are strip-shaped and are respectively slidably arranged on the tops of the respective side edges; The adjusting sheet has a thinned end close to the receiving cavity, the thinned end has a first state coinciding with the edge of the side edge, and a second state extending into the receiving cavity; When each of the adjusting sheets is driven to slide horizontally, the thinned end switches between the first state and the second state.

2. The coating gasket according to claim 1, wherein: The top end of the side edge is recessed downward to form a receiving groove; The receiving groove penetrates the transverse two sides of the side edge, and the adjusting sheet is slidably arranged in the receiving groove.

3. The coating gasket according to claim 1, wherein: The adjusting sheet has an adjusting end away from the receiving cavity; A clamping portion is provided on the adjusting end, and the clamping portion is used for clamping into a clamping block; When the clamping block is clamped into the clamping portion, the distance that the thinned end of the adjusting sheet extends into the receiving cavity is fixed.

4. The coating gasket according to claim 3, wherein: The clamping portion includes a clamping groove formed by recessing the length side of the adjusting sheet; The clamping block includes a vertical plate for clamping into the clamping groove and a horizontal plate connecting the vertical plate; The horizontal plate can be lapped on the adjusting sheet.

5. The coating gasket according to claim 4, wherein: The clamping grooves are configured to be multiple and arranged at intervals along the length direction of the adjusting sheet.

6. The coating gasket according to claim 5, wherein: The width of the clamping groove and the sum L1 between the adjacent two clamping grooves satisfy: 0.75mm ≤ L1 ≤ 1.25mm.

7. The coating gasket according to any one of claims 1 to 6, wherein: Chamfers are provided on the tops of the respective side edges and on the respective thinned ends; In the first state, the chamfers on the thinned end coincide with the chamfers on the side edge.

8. The coating gasket according to any one of claims 1 to 6, wherein: The coating gasket is made of a stainless steel plate, and the thickness L2 of the coating gasket satisfies: 0.3mm ≤ L2 ≤ 1.1mm.

9. A coating die head, including an upper die head and a lower die head, wherein: It further includes the coating gasket according to any one of claims 1 to 8 clamped between the upper die head and the lower die head.

Images