Edge coating extrusion die

Abstract

An edge glue coating extrusion die, the present application relates to battery processing production technology field, especially relates to functional slurry coating and insulating slurry coating for lithium battery extrusion die. By main film coating mechanism, edge glue coating mechanism and feed adjusting mechanism, main film coating mechanism and edge glue coating mechanism are independently arranged, and are embedded with each other, the glue amount of main film coating mechanism is adjusted in real time dynamically through feed adjusting mechanism, and the edge glue coating mechanism can switch the edge glue coating type at any time, which can greatly improve the efficiency in production, and can meet higher production speed, higher product requirement. The present application has the following advantages: 1) two functional slurries and insulating slurries can be coated simultaneously; 2) the different discharge opening ends arranged at equal intervals are alternately arranged, which can meet the material coating of all products with different coating widths; 3) the glue amount of main film coating is controllable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing and production, in particular to an extrusion die for functional slurry coating and insulating slurry coating of lithium batteries. BACKGROUND

[0002] Since the advent of lithium ion batteries, lithium ion batteries have been favored by many electrochemical industry practitioners due to their good electrochemical performance. The advantages of lithium batteries over ordinary batteries are long cycle life, high working voltage, good safety, etc. In the production process of lithium ion power batteries, coating is an important and essential process, which requires high precision and good consistency. The extrusion die is the key. Currently, in the production process of lithium ion power batteries, in order to improve the service life or safety, some products use edge glue coating. The existing glue coating methods mainly have two types, generally being split type and integral type. However, due to different production processes, direct switching of multiple products is often performed in the coating process, and the different process parameters of the two types affect the product and edge glue coating effect and production efficiency, which is prone to cause mixing and leakage of materials. In addition, in the integral film coating method, the gasket processing difficulty occurs, which seriously affects the film coating product quality, affects the adjustment precision and reaction time. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art and provide an edge glue coating extrusion die that can simultaneously coat functional materials and multiple insulating materials.

[0004] The present application is achieved by the following technical scheme: an edge glue coating extrusion die, which is composed of a main film coating mechanism, an edge glue coating mechanism, and a feed adjusting mechanism. The main film coating mechanism and the edge glue coating mechanism are independently arranged and embedded with each other. The feed adjusting mechanism can dynamically adjust the glue feeding amount of the main film coating mechanism in real time, and the edge glue coating mechanism can switch the edge glue coating type at any time, which can greatly improve the production efficiency and meet higher production speed and product requirements.

[0005] The main coating film mechanism comprises an upper die, a lower die and a large gasket. The long strip-shaped upper die with a convex corner and a trapezoidal cross section is connected to the lower die as a whole through fasteners. The large gasket is clamped between the upper die and the lower die and separates the contact surfaces of the two. The upper die is provided with a groove at the top. A plurality of through holes are arranged on one side of the groove. The through holes are in communication with the through slot at the bottom of the upper die. The long strip-shaped lower die has an inverted trapezoidal cross section. A large distribution cavity and a small distribution cavity are respectively arranged on the upper surface of the lower die along the longitudinal direction. The two cavities are separated by a cavity separation strip. The cavity separation strip is located below the through slot at the bottom of the upper die. A main coating film flow channel is fixed on the large distribution cavity and leads to the outside.

[0006] The edge coating mechanism comprises a pressing strip, a small gasket and an insulation layer feeding pipe. The pressing strip is fixed on the convex corner of the upper die. The end of the pressing strip in transverse contact with the convex corner is flush with the end of the upper die in transverse contact with the lower die. The small gasket is clamped between the pressing strip and the convex corner of the upper die and separates the contact surfaces of the two. A plurality of small hollow areas are sequentially arranged on the small gasket. The discharge opening end of the small hollow area is located at the end of the transverse contact between the pressing strip and the convex corner and is flush with the opening end of the large gasket. A plurality of insulation layer feeding pipes are fixed on the upper part of the pressing strip and are connected to the small hollow areas on the small gasket through the through holes on the pressing strip, forming a one-to-one communication relationship.

[0007] The feeding adjusting mechanism comprises a plurality of feeding adjusters, a fixed support, an adjusting rod and an adjusting block. The feeding adjusters are fixed on the groove at the top of the upper die through the fixed support. One end of the adjusting rod is arranged at the bottom of the feeding adjuster. The other end of the adjusting rod passes through the through hole arranged on one side of the groove, is inserted into the through slot at the bottom of the upper die and is fixedly connected with the adjusting block.

[0008] The groove at the top of the upper die is inclined to the horizontal plane, so that the through hole and the through slot on the upper die are at the same inclination angle, and the bottom surface of the adjusting block fixed to the other end of the adjusting rod is parallel to the horizontal plane.

[0009] The lengths of the plurality of adjusting blocks constitute the length of the through slot at the bottom of the upper die.

[0010] The discharge opening ends of the large gasket and the small gasket are arranged in intervals.

[0011] The discharge opening ends of the large gasket and the small gasket are arranged at equal distances.

[0012] The feeding adjuster is composed of a micrometer.

[0013] The fixed bracket consists of a support and a fixed frame. The feed regulator is fixed on the support, the fixed frame is fixedly connected to the support, and the fixed frame is fixed on the upper mold.

[0014] Compared with the prior art, this invention has the following advantages because it sets the main coating mechanism and the edge coating mechanism independently: 1) It can simultaneously coat two functional slurries and insulating slurries; 2) Several different discharge openings arranged at equal intervals are alternately arranged to meet the material coating of products with different coating widths; 3) The amount of adhesive fed into the main coating is controllable. Attached Figure Description

[0015] Appendix Figure 1 This is a perspective view of the present invention;

[0016] Appendix Figure 2 This is one of the exploded perspective views of the present invention;

[0017] Appendix Figure 3 This is the second exploded perspective view of the present invention;

[0018] Appendix Figure 4 This is the third exploded perspective view of the present invention;

[0019] Appendix Figure 5 This is a 3D model of the upper mold;

[0020] Appendix Figure 6 This is a 3D view of the upper mold with the bottom facing upwards;

[0021] Appendix Figure 7 This is a 3D view of the lower mold;

[0022] Appendix Figure 8 This is a side view of the present invention;

[0023] Appendix Figure 9 This is a top view of the present invention;

[0024] Appendix Figure 10 For the appendix Figure 9 Sectional view A-A;

[0025] Appendix Figure 11 For the appendix Figure 9 Sectional view B-B. Detailed Implementation

[0026] See attached Figures 1-11The utility model provides an edge glue coating extrusion die, which is composed of a main film coating mechanism 1, an edge glue coating mechanism 2 and a feed adjusting mechanism 3. The main film coating mechanism 1 and the edge glue coating mechanism 2 are independently arranged and embedded in each other. The feed adjusting mechanism 3 can dynamically adjust the glue feeding amount of the main film coating mechanism 1 in real time, and the edge glue coating mechanism 2 can switch the edge glue coating type at any time. Therefore, the efficiency of production can be greatly improved, and higher production speed and product requirements can be met.

[0027] The main film coating mechanism 1 comprises an upper die 11, a lower die 12 and a large gasket 13. The upper die 11 is in the shape of a long strip, has a convex corner 111 and a trapezoidal cross section, and is connected to the lower die 12 as a whole through fasteners. The large gasket 13 is clamped between the upper die 11 and the lower die 12 and separates the contact surfaces of the two. The upper die 11 is provided with a groove 112 at the top. A plurality of through holes 113 are arranged on one side of the groove 112 and are in communication with a through groove 114 at the bottom of the upper die 11. The lower die 12 is in the shape of a long strip and has an inverted trapezoidal cross section. A large distribution cavity 122 and a small distribution cavity 123 are respectively arranged on the upper surface of the lower die 12 in the longitudinal direction and are separated by a cavity separation strip 124. The cavity separation strip 124 is located below the through groove 114 at the bottom of the upper die 11. A main film coating flow channel 121 is fixedly arranged on the large distribution cavity 122 and leads to the outside.

[0028] The edge glue coating mechanism comprises a pressing strip 21, a small gasket 22 and an insulation layer feed pipe 23. The pressing strip 21 is fixed on the convex corner 111 of the upper die 11. The end of the pressing strip 21 at the transverse contact position with the convex corner 111 is flush with the end of the upper die 11 and the lower die 12 at the transverse contact position. The small gasket 22 is clamped between the pressing strip 21 and the convex corner 111 of the upper die 11 and separates the contact surfaces of the two. A plurality of small hollow areas 221 are sequentially arranged on the small gasket 22. The discharge opening end of the small hollow area 221 is located at the end of the transverse contact position of the pressing strip 21 and the convex corner 111 and is flush with the opening end of the large gasket 13. A plurality of insulation layer feed pipes 23 are fixedly arranged on the upper part of the pressing strip 21 and are connected to the small hollow areas 221 on the small gasket 22 through the through holes in the pressing strip 21, thereby forming a one-to-one corresponding communication relationship.

[0029] The feed adjusting mechanism 3 comprises several feed adjusters 31, fixing supports 32, adjusting rods 33 and adjusting blocks 34, the feed adjusters 31 are fixed on the grooves 112 on the top of the upper die 11 through the fixing supports 32, one end of the adjusting rod 33 is arranged at the bottom of the feed adjuster 31, the other end of the adjusting rod 33 passes through the through hole 113 arranged on one side of the groove 112, is inserted into the through slot 114 at the bottom of the upper die 11 and is fixedly connected with the adjusting block 34.

[0030] The groove 112 on the top of the upper die 11 is arranged obliquely to the horizontal plane, so that the through hole 113 and the through slot 114 on the upper die 11 are at the same oblique angle, and the bottom surface of the adjusting block 34 fixed on the other end of the adjusting rod 33 is parallel to the horizontal plane.

[0031] The length of the several adjusting blocks 34 constitutes the length of the through slot 114 at the bottom of the upper die 11.

[0032] The discharge opening ends of the large gaskets 13 and the discharge opening ends of the small gaskets 22 are arranged at intervals.

[0033] The discharge opening ends of the large gaskets 13 and the discharge opening ends of the small gaskets 22 are arranged at equal distances.

[0034] The feed adjuster 31 is composed of a micrometer.

[0035] The fixing support 32 is composed of a support 321 and a fixing frame 322, the feed adjuster 31 is fixed on the support 321, the fixing frame 322 is fixedly connected with the support 321, and the fixing frame 322 is fixed on the upper die 11.

[0036] When the present application is applied, the main slurry is introduced into the large distribution cavity 122 of the lower mold 12 through the main film coating flow channel 121 on the lower mold 12 by the external pipeline, passes through the cavity partition strip 124, and then enters the small distribution cavity 123. Due to the distribution of the main slurry into the two cavities, the flow is stabilized, and finally the main slurry is coated on the substrate through the flow channel formed by the discharge opening section of the large hollow area 131 of the large gasket 13 of the lower mold 12. In the above operation, when it is necessary to control the flow of the main slurry, the feed regulator 31 is rotated, the feed regulator 31 causes the adjusting rod 33 to move up and down along the through hole 113 of the groove 112, and drives the adjusting block 34 fixed at the bottom to move synchronously. Since the through hole 113 and the through slot 114 on the upper mold 11 are at the same inclination angle, and the bottom surface of the adjusting block 34 fixed at the other end of the adjusting rod 33 is parallel to the horizontal plane, the rotation of the feed regulator 31 causes the adjusting block 34 to move downward in the inclined direction, which refines the movement distance, and as the length of the adjusting block 34 protruding out of the through slot 114 at the bottom of the upper mold 11, the cavity partition strip 124 is located below the through slot 114 at the bottom of the upper mold 11, the main slurry entering the small distribution cavity 123 from the large distribution cavity 122 through the cavity partition strip 124 can be controlled, thereby achieving the purpose of accurately controlling the main slurry.

[0037] When the insulating slurry flows into the small hollow area 221 on the small gasket 22 through the insulating layer feed pipe 23 and the through hole on the pressing strip 21, and flows out at the end of the horizontal contact between the end pressing strip 21 and the convex angle 111 through the discharge opening of the small hollow area 221. If different insulating slurries or multiple slurries need to be input, the insulating layer feed pipe 23 only needs to be connected to the corresponding insulating slurry barrel.

[0038] The above is only the preferred embodiment of the present application, and does not limit the technical scope of the present application. Any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still falls within the scope of the technical solution of the present application.

Claims

1. An edge gluing extrusion die characterized by: The utility model discloses a main film coating mechanism, edge rubber coating mechanism and feed adjusting mechanism, the main film coating mechanism includes upper mould, lower mould and big gasket, and the upper mould with convex angle is connected with lower mould as a whole through fastener, and big gasket is clamped between upper mould and lower mould, and the contact surface of two is separated, the upper mould top is equipped with recess, and the recess one side is equipped with a plurality of through -hole, and the through -hole is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through -groove of upper mould bottom, and the upper mould bottom is communicated with the through - ​ ​ ​ 2. The edge gluing extrusion die according to claim 1, characterized in that: ​ 3. The edge gluing extrusion die of claim 1, wherein: ​ 4. The edge gluing extrusion die according to claim 1 or 3, characterized in that: ​ 5. The edge gluing extrusion die of claim 1, wherein: ​ 6. The edge gluing extrusion die of claim 1, wherein: ​

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