Novel split type die head

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a novel split type die head which comprises an upper die head, a lower die head and a micrometer, the micrometer is installed on the upper die head, a gasket is installed on the lower die head, the upper die head comprises an upper die head fixing part and an upper die head rotating part, and the upper die head fixing part is connected with the upper die head rotating part. The two ends of the upper die head rotating part are hinged to the upper die head fixing part through a rotating mechanism, and the micrometer is installed on the upper die head rotating part. The upper die head is divided into the fixed part and the rotating part, and the rotating part can be rotationally opened relative to the fixed part, so that a gasket is convenient to replace, slurry consumption in the replacement process is greatly reduced, consumed time is short, efficiency is high, and meanwhile a micrometer is convenient to clean.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and particularly relates to a novel split die head. Background Art

[0002] During extrusion coating, due to different size requirements for different products, and during the coating process, due to the adjustment of coating speed and surface density, it is necessary to replace the gasket. Currently, in the industry, the whole gasket is mainly replaced to adapt to the product. When updating the gasket for different products, the main updated positions mainly focus on the chamfer at the gasket discharge port, the island size, and the thinning half-notch design. It is time-consuming and laborious to update the whole gasket. During the storage of the gasket, it is easy to bend and deform. For this reason, a Chinese patent discloses a novel split die head and a coating die head, application number: CN202210328276.7. The novel split die head includes a gasket body and a sub-gasket; the gasket body is provided with an installation opening; the sub-gasket is detachably installed in the installation opening, and the sub-gasket is provided with a colloid flow channel for communicating with the dispensing hole of the upper die head and a glue outlet communicating with the colloid flow channel. This patent uses a split structure to solve the technical problems of gasket waste and long processing cycle, but still has the following disadvantages: First, when replacing the gasket in the prior art, it is necessary to remove the upper die fixing bolts, and it is easy to damage the die head and scratch the die head interface during the process of opening and closing the upper die head; Second, when cleaning the slurry inside the die head cavity, it is necessary to remove, replace, and calibrate the entire gasket. After the replacement is completed, it is also necessary to perform a feeding cycle to exhaust air. A large amount of slurry is consumed during the cleaning process. When there is an error in the position after replacement, it is necessary to replace the gasket again. Bubbles and tape hanging are likely to occur during the start of coating, and it is necessary to repeatedly test the coating. The technical requirements for operators are relatively high, the manual input is large, and the efficiency is low; Third, in the flow channel of the traditional positive electrode ceramic glue in the die head, there is no buffer cavity, so the coating amount is unstable, the boundary is wavy, and mixing occurs during high-speed coating. Moreover, the glue is directly opened at the die head, and it is relatively difficult to clean during long-term use. It is inevitable to mix different ceramic glues when switching between different ceramic glues. After mixing different ceramic glues, it will have a greater impact on coating, rolling, and subsequent battery performance. At the same time, during continuous coating, the surface density needs to be adjusted online with a micrometer. The micrometer not only needs to be cleaned and replaced regularly, but also when there are scratches on the slurry along the position of the micrometer T-block during the coating process, if it is determined that the micrometer is stuck with material, it also needs to be cleaned. And for the micrometer being stuck with material, generally only among several micrometers, limited by the die head lip design, it is necessary to disassemble the die head, which will also cause the problem of repeatedly opening and closing the upper die head, resulting in damage to the die head and scratching of the die head cross-section. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a novel split die head to solve the problems existing in the prior art.

[0004] To achieve the above object, the present utility model provides the following technical solution: a novel split die head, including an upper die head, a lower die head and a micrometer. The micrometer is installed on the upper die head, and a gasket is installed on the lower die head. The upper die head includes an upper die head fixed part and an upper die head rotating part. Both ends of the upper die head rotating part are hinged to the upper die head fixed part through a rotating mechanism, and the micrometer is installed on the upper die head rotating part. The upper die head is divided into a fixed part and a rotating part, and the rotating part can rotate and open relative to the fixed part, so as to facilitate the replacement of the gasket, greatly reduce the slurry consumption during the replacement process, shorten the time-consuming, improve the efficiency, and at the same time facilitate the cleaning of the micrometer.

[0005] Preferably, both ends of the upper die head rotating part are provided with ceramic glue channels, and a replaceable ceramic glue buffer cavity is installed in the ceramic glue channels. This structure can not only be disassembled for thorough cleaning, but also the ceramic glue buffer cavity can be installed according to parameters such as the viscosity and solid content of different types of ceramic glue.

[0006] Preferably, the inside of the ceramic glue buffer cavity has a cavity, and the upper part of the ceramic glue buffer cavity is provided with a ceramic glue inlet communicating with the cavity. The shape of the cavity can be reasonably designed according to parameters such as the viscosity and solid content of different types of ceramic glue.

[0007] Preferably, connecting ears are fixed on both sides of the upper part of the ceramic glue buffer cavity, and the connecting ears are connected to the upper die head rotating part through bolts. The ceramic glue buffer cavity can be fixed to the upper die head rotating part through the connecting ears.

[0008] Preferably, the rotating mechanism includes a rotating shaft, a bearing seat and a connecting block. The two bearing seats are fixed on both sides of the upper part of the upper die head rotating part, the connecting block is fixed on the upper die head rotating part, and the connecting block is connected to the bearing seat through the rotating shaft. This rotating mechanism has a simple structure and can enable the upper die head rotating part to rotate smoothly.

[0009] Preferably, the upper die head fixed part is provided with an installation groove for installing the upper die head rotating part. When the upper die head rotating part works, it is received in the installation groove.

[0010] Preferably, the gasket is composed of a gasket body and a partial gasket, and the partial gasket is detachably installed on the gasket body. The design structure of the partial gasket is simple, the processing difficulty is low, and it is convenient to store later without bending.

[0011] Preferably, the gasket body is provided with a T-shaped groove, and the partial gasket is provided with a T-shaped block matching with the T-shaped groove. It is convenient to replace, has a low processing difficulty, and improves the development efficiency.

[0012] Preferably, the rotation range of the rotating part of the upper die head is 0-90°, and it can be 60°, 80° or 90°.

[0013] Preferably, there are multiple micrometers, which are arranged side by side on the rotating part of the upper die head.

[0014] The beneficial effects of the present utility model are as follows: 1. The upper die head is set as a rotatable and openable structure, which facilitates the replacement of the gasket, greatly reduces the slurry consumption during the replacement process, has a short time consumption and high efficiency, and at the same time facilitates the cleaning of the micrometer;

[0015] 2. A ceramic adhesive buffer cavity is provided inside the rotating part of the upper die head, which can not only be disassembled for thorough cleaning, but also the ceramic adhesive buffer cavity can be installed according to parameters such as the viscosity and solid content of different types of ceramic adhesives;

[0016] 3. The gasket is of a split structure. When continuous improvement and design are required, only the local gasket needs to be designed, which reduces the design workload and improves the design efficiency. When designing new products and improving the finalization, the development efficiency is greatly improved. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the utility model;

[0018] Figure 2 is a three-dimensional view of the fixed part of the upper die head in the present utility model;

[0019] Figure 3 is a partially enlarged view of the gasket in the utility model;

[0020] Figure 4 is a three-dimensional view of the gasket body in the present utility model;

[0021] Figure 5 is a three-dimensional view of one of the local gasket designs in the present utility model;

[0022] Figure 6 is a three-dimensional view of another local gasket design in the present utility model;

[0023] Figure 7 is a three-dimensional view of the ceramic adhesive buffer cavity in the present utility model;

[0024] Figure 8 is a structural schematic diagram of the internal cavity of one of the ceramic adhesive buffer cavities in the present utility model;

[0025] Figure 9 is a structural schematic diagram of the internal cavity of another ceramic adhesive buffer cavity in the present utility model;

[0026] Figure 10 is a three-dimensional view of the rotating mechanism in the present utility model;

[0027] Description of the reference numerals: 1, lower die head; 2, micrometer; 3, gasket; 31, gasket body; 311, T-shaped groove; 32, partial gasket; 321, T-shaped block; 322, glue outlet; 323, edge outlet of the material area; 4, fixed part of the upper die head; 41, installation groove; 5, rotating part of the upper die head; 51, ceramic glue channel; 52, ceramic glue buffer cavity; 521, cavity; 522, ceramic glue inlet; 523, connecting ear; 524, bolt; 6, rotating mechanism; 61, rotating shaft; 62, bearing seat; 63, connecting block. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixedly connected", "fixedly joined" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0031] The following will describe in detail the specific implementation manners of the present utility model in conjunction with the drawings and the preferred embodiments.

[0032] As Figure 1As shown, a new type of split die head includes an upper die head, a lower die head 1, and a micrometer 2. The micrometer is installed on the upper die head, and a gasket 3 is installed on the lower die head. The upper die head includes an upper die head fixed part 4 and an upper die head rotating part 5. Both ends of the upper die head rotating part are hinged to the upper die head fixed part through a rotating mechanism 6. Specifically, as Figure 2 shown, the upper die head fixed part 4 is provided with an installation groove 41 for installing the upper die head rotating part. The upper die head rotating part can be opened upwards by 0 - 90°, and this opening angle is determined according to the actual situation, which can be 45°, 60°, or 90°. In this embodiment, it is opened by 90°, and when closed, the whole rotates into the installation groove. Multiple micrometers 2 are arranged side by side on the upper die head rotating part 5. This structure divides the upper die head into a fixed part and a rotating part. The rotating part can be rotated and opened relative to the fixed part, thus facilitating the replacement of the gasket, greatly reducing the slurry consumption during the replacement process, having a short time-consuming and high efficiency, and at the same time facilitating the cleaning of the micrometer.

[0033] As Figure 3 shown, further, in this embodiment, the gasket 3 is composed of a gasket body 31 and a partial gasket 32. The partial gasket is detachably installed on the gasket body. The design structure of the partial gasket is simple, the processing difficulty is low, and it is convenient to store later without bending. The partial gasket can be designed into various structures according to requirements. For example, the glue liquid outlets 322 of the partial gasket are designed to be the same, and the edge outlet 323 of the material area is a semi-notch design to strengthen and thin. As Figures 4-6 shown, in order to facilitate the assembly of the partial gasket and the gasket body, the gasket body is provided with a T-shaped groove 311, and the partial gasket is provided with a T-shaped block 321 that cooperates with the T-shaped groove. The T-shaped block is clamped in the T-shaped groove, thus facilitating replacement, having a low processing difficulty, and improving the development efficiency.

[0034] As Figure 7 shown, for traditional positive electrode ceramic glue liquid, due to the absence of a buffer cavity in the flow channel of the die head, the coating amount is unstable during high-speed coating, and there are situations such as boundary waves and mixing of materials. Moreover, the ceramic glue liquid directly opens at the die head, and it is more difficult to clean during long-term use. Inevitably, there will be mixing of materials when switching between different ceramic glue liquids. Therefore, to solve the above problems, ceramic glue liquid channels 51 are provided at both ends of the upper die head rotating part 5 in this embodiment, and replaceable ceramic glue liquid buffer cavities 52 are installed in the ceramic glue liquid channels. The ceramic glue liquid buffer cavities can be installed according to parameters such as the viscosity and solid content of different types of ceramic glue liquids. As Figure 8 and Figure 9 shown, the inside of the ceramic glue liquid buffer cavity has a cavity 521, and the upper part of the ceramic glue liquid buffer cavity is provided with a ceramic glue liquid inlet 522 that communicates with the cavity. The shape of the cavity can be reasonably designed according to parameters such as the viscosity and solid content of different types of ceramic glue liquids. As Figure 7As shown in the figure, in order to connect the ceramic adhesive buffer cavity with the rotating part of the upper die head, connecting ears 523 are fixed on both sides of the upper part of the ceramic adhesive buffer cavity. The connecting ears are connected to the rotating part of the upper die head through bolts 524. The ceramic adhesive buffer cavity and the rotating part of the upper die head are fixed through the connecting ear shell. By setting different cavity mechanisms, not only can it be disassembled for thorough cleaning, but also the ceramic adhesive buffer cavity can be installed according to parameters such as the viscosity and solid content of different types of ceramic adhesives.

[0035] As Figure 10 shown in the figure, specifically, in this embodiment, the rotating mechanism 6 includes a rotating shaft 61, a bearing seat 62, and a connecting block 63. The two bearing seats are fixed on both sides of the upper part of the rotating part of the upper die head, the connecting block is fixed on the rotating part of the upper die head, and the connecting block and the bearing seat are connected through the rotating shaft. This rotating mechanism has a simple structure and can enable the rotating part of the upper die head to rotate smoothly.

[0036] The following is further illustrated with specific embodiments as follows:

[0037] The aluminum foil of a certain model coating incoming material is double-sided polished, with a thickness of 12 μm, a width of 433 ± 0.5 mm, a coating width of 385 ± 1.0 mm, and a blank space of 24.0 ± 1.0 mm. The required coating process parameters are a coating width of 156 ± 0.5 mm, a lateral alignment of 0.0 ± 0.5 mm, and a single-sided coating amount of 20.15 ± 0.15 mm. According to experience, three types of local gaskets, namely A, B, and C, are designed for thinning control. When using the A local gasket to return to double-sided, the pole piece winding bulges. By detecting the thickness of the pole piece, it is found that there are thick edges on both sides of the pole piece. After separately testing the single and double sides, it is found that the thinning of the return double-sided is less. Therefore, it is necessary to replace the local B gasket with a greater thinning degree. Open the rotating part of the upper die head, take out the A local gasket, then align and place the local B gasket, close the die head, then the die head sprays a small amount of material, and then conduct a trial coating. The result of the trial coating is qualified without thick edges, but the ceramic adhesive is mixed with the material area. Online adjust the pressure of the ceramic adhesive upper die head cavity, and the mixing problem is not completely improved. So, replace the C gasket in the same way. After adjustment after the trial coating, both the thinning and mixing problems are solved, but the pressure fluctuation of the ceramic adhesive during coating is relatively large, and there are wavy edges on the ceramic adhesive during the coating process. By replacing another cavity structure and conducting another trial coating, the pressure is stable and there are no wavy edges. After normal coating of 1500 m, it is found that there are longitudinal stripes in the material area, and the stripe position coincides with the position of the micrometer T block. Therefore, consider cleaning the material stuck by the micrometer. Open the rotating part of the upper die head, then thoroughly wipe the material between the corresponding T blocks of the micrometer, close the die head and spray a small amount of material, and then the coating is normal.

[0038] For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A new type of split die head, comprising an upper die head, a lower die head and a micrometer. The micrometer is installed on the upper die head, and a gasket is installed on the lower die head. It is characterized in that: The upper die head includes an upper die head fixed part and an upper die head rotating part. Both ends of the upper die head rotating part are hinged to the upper die head fixed part through a rotating mechanism, and the micrometer is installed on the upper die head rotating part.

2. The novel split die head according to claim 1, characterized in that: Both ends of the upper die head rotating part are provided with ceramic adhesive channels, and a replaceable ceramic adhesive buffer cavity is installed in the ceramic adhesive channels.

3. The novel split die according to claim 2, characterized in that: The interior of the ceramic adhesive buffer cavity has a cavity, and the upper part of the ceramic adhesive buffer cavity is provided with a ceramic adhesive inlet communicating with the cavity.

4. The novel split die according to claim 2, characterized in that: Both sides of the upper part of the ceramic adhesive buffer cavity are fixed with connecting ears, and the connecting ears are connected to the upper die head rotating part through bolts.

5. The novel split die according to claim 1, characterized in that: The rotating mechanism includes a rotating shaft, a bearing seat and a connecting block. The two bearing seats are fixed on both sides of the upper part of the upper die head rotating part, the connecting block is fixed on the upper die head rotating part, and the connecting block is connected to the bearing seat through the rotating shaft.

6. The novel split die according to claim 5, wherein: The upper die head fixed part is provided with an installation groove for installing the upper die head rotating part.

7. The novel split die head according to claim 1, wherein: The gasket is composed of a gasket body and a partial gasket, and the partial gasket is detachably installed on the gasket body.

8. The novel split die head according to claim 7, wherein: The gasket body is provided with a T-shaped groove, and the partial gasket is provided with a T-shaped block matching the T-shaped groove.

9. The novel split die according to claim 1, wherein: The rotation range of the upper die head rotating part is 0 - 90°.

10. The novel split die head according to claim 1, wherein: There are multiple micrometers, which are arranged side by side on the upper die head rotating part.

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