Splicing lithium battery coating gasket

Abstract

The utility model discloses a lithium battery coating gasket capable of being spliced, which comprises a first gasket main body, a second gasket main body, a third gasket main body and a fourth gasket main body which are connected through a mortise and tenon joint structure, the second gasket body and the third gasket body are arranged between the first gasket body and the fourth gasket body according to needs, and the first gasket body and the fourth gasket body are of a symmetrical structure. A flow guide structure is arranged on the second gasket body, and the third gasket body is of a rectangular structure. According to the lithium battery coating gasket capable of being spliced, provided by the utility model, the whole gasket is divided into the gasket main bodies with different shapes, and the adjacent gasket main bodies are spliced by adopting the mortise and tenon joint structures, so that the problem that the whole gasket needs to be redesigned due to different coating widths and different coating scroll numbers of different products is solved.

Description

Technical Field

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

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The coating process is one of the key processes in lithium battery production, in which the gasket plays an important role in the coating process. With the update and iteration of lithium battery product models, the requirements for the corresponding coating width and the number of coating strips are also different. Most of the existing gaskets are integral structures, and different products need to replace different gaskets during coating to meet the process design requirements. When it is necessary to produce a pole piece of another coating size, a new die gasket needs to be remade to meet the use requirements; this will cause the following problems: (1) The structure of the die gasket is relatively complex, so the processing accuracy of the die gasket is high, which results in high cost; (2) When the coating size needs to be adjusted, the entire die gasket must be scrapped, and then a new die gasket must be reprocessed, which is relatively costly; (3) The overall size of the die gasket is large, and the shape and structure are complex and easy to deform.

[0004] In addition, from development to mass production of the same product, differences in equipment and slurry require timely processing of new gaskets to achieve the expected coating width. Therefore, it is necessary to prepare a variety of gaskets with different opening widths and different numbers of stripes to meet the requirements of different coating processes, which significantly increases the production cost of the gasket. Utility Model Content

[0005] The purpose of the utility model is to provide a splicable lithium battery coating gasket, which divides the overall gasket into gasket bodies of different shapes, and adopts a mortise and tenon structure to splice adjacent gasket bodies, thereby solving the problem of needing to redesign the entire gasket due to different coating widths and different numbers of coating strips for different products.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a splicable lithium battery coated gasket, comprising a first gasket body, a second gasket body, a third gasket body and a fourth gasket body connected by a mortise and tenon structure, the first gasket body and the fourth gasket body are respectively located at two ends, the second gasket body and the third gasket body are arranged between the first gasket body and the fourth gasket body as needed, the first gasket body and the fourth gasket body are symmetrical structures; a guide structure is arranged on the second gasket body, and the third gasket body is a rectangular structure.

[0008] As a further technical solution, the first gasket body includes a bottom gasket and an inverted L-shaped gasket, and the bottom gasket and the inverted L-shaped gasket are an integrated structure.

[0009] As a further technical solution, a protrusion extends from the connection position between the bottom gasket and the inverted L-shaped gasket in the direction of the bottom gasket.

[0010] As a further technical solution, the second gasket body includes a bottom gasket and a guide gasket, and the bottom gasket and the guide gasket are an integrated structure.

[0011] As a further technical solution, the guide gasket is rectangular at the top and trapezoidal at the bottom, and the trapezoidal part of the guide gasket is connected to the bottom gasket.

[0012] As a further technical solution, the mortise and tenon structure adopts a dovetail protrusion and a dovetail groove to cooperate with each other.

[0013] As a further technical solution, a dovetail protrusion and a dovetail groove are provided at the connection position of two adjacent pad block bodies.

[0014] As a further technical solution, the dovetail protrusion and the dovetail groove of the same pad body are separated by a certain distance.

[0015] As a further technical solution, the splicing position of the cushion block body is L-shaped, and the gap between two adjacent cushion block bodies after splicing is Z-shaped.

[0016] As a further technical solution, the first gasket body and the fourth gasket body are fixedly matched with two sides of the die head.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The splicable lithium battery coating gasket provided by the utility model divides the whole gasket into gasket main bodies of different shapes, and adopts mortise and tenon structure to splice adjacent gasket main bodies, thereby solving the problem of needing to redesign the whole gasket due to different coating widths and different numbers of coating strips of different products; in addition, the coating gasket can recycle the whole scrapped gasket and cut it into pieces, which can be subsequently spliced ​​as gasket main bodies, thereby improving the recovery rate and utilization rate of waste gaskets.

[0019] The utility model provides a splicable lithium battery coating gasket, and a guide structure is arranged on the second gasket body. After the second gasket body is spliced ​​with other gaskets, the outlet cross-section first increases and then decreases without changing. The set guide gasket has a guide effect on the coating slurry, which alleviates the flow rate in the middle section, balances the flow at the opening, eliminates the uneven coating film caused by the high flow rate and pressure at the discharge position closest to the feed inlet, ensures the consistency of flow in the middle and on both sides of the coating film, effectively ensures that the thickness of the electrode and the parallel direction of the opening of the sheet body are consistent during the coating process of the lithium battery electrode, and improves the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the composition structure of the splicable lithium battery coating gasket of the utility model;

[0022] Figure 2 It is a schematic diagram of a splicing method of the splicable lithium battery coating gasket of the utility model;

[0023] Figure 3 It is a schematic diagram of the mortise and tenon structure in the utility model;

[0024] Figure 4 It is a schematic diagram of adjacent gaskets in the utility model after splicing.

[0025] The schematic diagram is for illustrative purposes only;

[0026] Among them, 1. the first gasket body; 101. the inverted L-shaped gasket; 102. the first bottom gasket; 103. the protrusion; 2. the second gasket body; 201. the second bottom gasket; 202. the guide gasket; 3. the third gasket body; 4. the fourth gasket body; 5. the mortise and tenon structure; 501. the dovetail protrusion; 502. the dovetail groove. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] Example 1

[0029] In a typical implementation of the present invention, Figure 1 and Figure 2As shown, a splicable lithium battery coating gasket is provided, comprising a first gasket body 1, a second gasket body 2, a third gasket body 3 and a fourth gasket body 4 connected by a mortise and tenon structure 5, wherein the first gasket body 1 and the fourth gasket body 4 are respectively located at two ends, and the second gasket body 2 and the third gasket body 3 are arranged between the first gasket body 1 and the fourth gasket body 4 as needed, and the first gasket body 1 and the fourth gasket body 4 are symmetrical structures; a guide structure is arranged on the second gasket body 2, and the third gasket body 3 is a rectangular structure, and different numbers of third gasket bodies 3 and fourth gasket bodies 4 are arranged to meet the requirements of different coating widths and multi-strip coating.

[0030] In this embodiment, the first gasket body 1 includes a first bottom gasket 102 and an inverted L-shaped gasket 101, the first bottom gasket 102 and the inverted L-shaped gasket 101 are an integrated structure, and a protrusion 103 extends from the connecting position of the first bottom gasket 102 and the inverted L-shaped gasket 101 along the direction of the first bottom gasket 102. When installing the gasket, the position of the protrusion 103 is adjusted horizontally to adjust and correct the flatness of the gasket; when disassembling and assembling the gasket, the protrusion 103 can also be used as a handle to ensure that the gasket is not easily deformed.

[0031] In this embodiment, the second gasket body 2 includes a second bottom gasket 201 and a guide gasket 202. The second bottom gasket 201 and the guide gasket 202 are an integrated structure. The guide gasket 202 is rectangular at the top and trapezoidal at the bottom. The trapezoidal part of the guide plate 202 is connected to the second bottom gasket 201, so that the second gasket body 2 after connection is in a T-shaped structure. After the second gasket body 2 is spliced ​​with other gaskets, the outlet cross-section first increases and then decreases without changing. The guide gasket is provided to form a guide effect on the coating slurry, relieve the flow velocity in the middle section, balance the flow at the opening, eliminate the uneven coating film caused by the high flow velocity and pressure at the discharge position closest to the feed port, ensure the flow consistency between the middle and both sides of the coating film, and effectively ensure the consistency of thickness of the electrode and the parallel direction of the opening of the sheet during the coating process of the lithium battery electrode.

[0032] like Figure 3 and Figure 4 As shown, the mortise and tenon structure 5 adopts a dovetail protrusion 501 and a dovetail groove 502 to cooperate with each other, and the connection positions of two adjacent pad block bodies are each provided with a dovetail protrusion 501 and a dovetail groove 502. For example, a dovetail groove is provided on the upper part of a pad block body and a dovetail protrusion is provided on the lower part, and a dovetail protrusion is provided at the corresponding position on the upper part of the other pad block body spliced ​​therewith, and a dovetail groove is provided at the corresponding position on the lower part. The dovetail protrusion and dovetail groove on one pad block body are separated by a certain distance, thereby improving the stability of the splicing of adjacent pad block bodies.

[0033] Furthermore, the splicing position of the pad block body is L-shaped, and the gap between two adjacent pad block bodies after splicing is Z-shaped. During the splicing process, docking is convenient and the positioning accuracy is high, thereby improving the strength of the entire lithium battery coated gasket.

[0034] When in use, different numbers of second gasket bodies and third gasket bodies are spliced ​​between the first gasket body and the fourth gasket body according to the coating width and the number of coating strips. If the coating width is small, the third gasket body may not be spliced. Figure 2 As shown, the first gasket body and the fourth gasket body are then fixedly matched with both sides of the die head to realize the coating process of the pole piece.

[0035] This embodiment adopts a split gasket structure, which solves the problem of needing to redesign the entire gasket due to different coating widths and different numbers of coating strips for different products. In addition, during the application process, the scrapped entire gasket can be recycled and cut into pieces, and then used as the gasket body for subsequent splicing, thereby improving the gasket recycling efficiency and utilization rate.

[0036] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A splicable lithium battery coating gasket, characterized in that: It includes a first gasket body, a second gasket body, a third gasket body and a fourth gasket body which are connected by a mortise and tenon structure, the first gasket body and the fourth gasket body are respectively located at two ends, the second gasket body and the third gasket body are arranged between the first gasket body and the fourth gasket body as needed, and the first gasket body and the fourth gasket body are symmetrical structures; a guide structure is arranged on the second gasket body, and the third gasket body is a rectangular structure.

2. The splicable lithium battery coating gasket according to claim 1, characterized in that: The first gasket body includes a bottom gasket and an inverted L-shaped gasket, and the bottom gasket and the inverted L-shaped gasket are an integrated structure.

3. The splicable lithium battery coating gasket as claimed in claim 2, characterized in that: A protrusion extends from the connection position between the bottom gasket and the inverted L-shaped gasket in the direction of the bottom gasket.

4. The splicable lithium battery coating gasket according to claim 1, characterized in that: The second gasket body includes a bottom gasket and a flow guide gasket, and the bottom gasket and the flow guide gasket are an integrated structure.

5. The splicable lithium battery coating gasket as claimed in claim 4, characterized in that: The guide gasket is rectangular at the top and trapezoidal at the bottom, and the trapezoidal part of the guide gasket is connected to the bottom gasket.

6. The splicable lithium battery coating gasket according to claim 1, characterized in that: The mortise and tenon structure adopts a dovetail protrusion and a dovetail groove to cooperate with each other.

7. The splicable lithium battery coating gasket as claimed in claim 6, characterized in that: A dovetail protrusion and a dovetail groove are provided at the connection position of two adjacent pad block bodies.

8. The splicable lithium battery coating gasket as claimed in claim 7, characterized in that: The dovetail protrusion and the dovetail groove of the same pad body are separated by a certain distance.

9. The splicable lithium battery coating gasket as claimed in claim 7, characterized in that: The splicing position of the cushion block body is L-shaped, and the gap between two adjacent cushion block bodies after splicing is Z-shaped.

10. The splicable lithium battery coating gasket according to claim 1, characterized in that: The first gasket body and the fourth gasket body are fixedly matched with two sides of the die head.

Images