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CN-224221745-U - Coating die head capable of detecting and adjusting pressure of coating cavity in partitioned mode

CN224221745UCN 224221745 UCN224221745 UCN 224221745UCN-224221745-U

Abstract

The utility model discloses a coating die head capable of detecting and adjusting the pressure of a coating cavity in a partitioning mode, which comprises an upper die head, a lower die head, a coating gasket and a plurality of cavity pressure sensors, wherein the lower die head is arranged below the upper die head, the lower die head is internally provided with a coating cavity and a slurry feed pipe communicated with the coating cavity, the coating gasket is provided with a plurality of slurry discharge holes, the coating gasket is arranged between the upper die head and the lower die head, the upper die head, the coating gasket and the lower die head enclose a coating runner for forming slurry, the coating cavity is communicated with the discharge holes, the discharge holes are communicated with the coating runner, the end parts of the coating runner form the coating holes, the pressure regulating blocks are formed by splicing a plurality of sub-pressure regulating blocks with the same or different sizes, the pressure regulating blocks are arranged below the coating gasket and correspond to the positions of the upper discharge holes of the coating gasket, and are positioned in the coating cavity, and the cavity pressure sensors are arranged on the upper die head and/or the lower die head and are used for respectively detecting the pressure corresponding to the positions of the discharge holes in the coating cavity.

Inventors

  • WANG CHAOCHEN

Assignees

  • 江苏睿恩新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250328

Claims (10)

  1. 1. A coating die capable of detecting and adjusting the pressure of a coating cavity in a partitioning manner, which is characterized by comprising: An upper die head (1); A lower die head (2) arranged below the upper die head (1), wherein a coating cavity (21) and a slurry supply pipe (6) communicated with the coating cavity (21) are arranged in the lower die head (2); The coating gasket (3) is provided with a plurality of slurry discharge holes (32), the coating gasket (3) is arranged between the upper die head (1) and the lower die head (2), the upper die head (1), the coating gasket (3) and the lower die head (2) are enclosed to form a coating runner (7) of slurry, the coating cavity (21) is communicated with the discharge holes (32), the discharge holes (32) are communicated with the coating runner (7), and the end part of the coating runner (7) forms a coating port (8); the pressure regulating block (4) is formed by splicing a plurality of sub-pressure regulating blocks (41) with the same or different sizes, the pressure regulating block (4) is arranged below the coating gasket (3) and corresponds to the position of each discharge hole (32) on the coating gasket (3), and the pressure regulating block (4) is also positioned in the coating cavity (21); And a plurality of cavity pressure sensors (5) which are arranged on the upper die head (1) and/or the lower die head (2), wherein the cavity pressure sensors (5) are respectively used for detecting the pressure corresponding to each discharge hole (32) in the coating cavity (21).
  2. 2. A coating die capable of zonal detection and adjustment of coating cavity pressure according to claim 1, wherein the coating cavity (21) is arranged in a hemispherical structure.
  3. 3. The coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning manner according to claim 1, wherein a plurality of connecting holes are further formed in the coating gasket (3), and the upper die head (1) and the lower die head (2) clamp the coating gasket (3) through fixing bolts and the connecting holes.
  4. 4. A coating die capable of zoned detection and adjustment of coating cavity pressure according to claim 1 or 3, characterized in that the coating gasket (3) comprises a gasket body (31), the gasket body (31) having a first direction and a second direction perpendicular to each other; The gasket comprises a gasket body (31), wherein a plurality of sequentially arranged discharge holes (32) are formed in the gasket body (31) along a first direction, and the opening direction of each discharge hole (32) is in a second direction.
  5. 5. The coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning manner according to claim 4, wherein the thickness of the gasket body (31) is 0.1-2.0 mm.
  6. 6. A coating die capable of zonally detecting and adjusting the pressure of a coating cavity according to claim 4, wherein a plurality of said sub-pressure adjusting blocks (41) have the same or different widths in the second direction and the same or different lengths in the first direction.
  7. 7. A coating die capable of detecting and adjusting the pressure of a coating cavity in a partitioning manner according to claim 1, wherein the plurality of sub-pressure adjusting blocks (41) are made of the same or different materials.
  8. 8. The coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning manner according to claim 1 or 7, wherein the material of the sub-pressure adjusting block (41) is one or more of nickel, copper nickel plating and stainless steel.
  9. 9. The coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning manner according to claim 1, wherein the coating speed of the coating die head is 10-80 m/min.
  10. 10. The coating die capable of detecting and adjusting the pressure of a coating cavity in a partitioning manner according to claim 1, wherein the coating die is suitable for coating slurry with a solid content of 50-75% and a viscosity of 3000-20000 mpa.s.

Description

Coating die head capable of detecting and adjusting pressure of coating cavity in partitioned mode Technical Field The utility model relates to the technical field of slurry coating equipment, in particular to a coating die head capable of detecting and adjusting the pressure of a coating cavity in a partitioning manner. Background Along with the higher and higher requirements on the performance of lithium batteries, when the extrusion type continuous coating die head used in the lithium battery industry at present is coated, the flow rate of each part of slurry in a coating cavity is influenced by the feeding position of the main slurry, so that the coating pressure in the die head cavity is uneven, the pressure distribution is large in the middle and small on two sides, the uneven coating pressure can cause unstable trend of the coating surface density of the lithium battery pole piece, and the transverse surface density of the pole piece gradually shows trend of low in the middle, high on two sides or high in the middle and low on two sides and is gradually increased. In the process of deterioration of the surface density trend, the current coating die head cannot effectively monitor the pressure change of each region in the die head cavity, and the transverse consistency of the pressure in the coating cavity cannot be ensured through corresponding measures according to the pressure change, so that the problem of uneven coating pressure can seriously influence the surface density consistency of the coated pole piece, and further influence the capacity and performance consistency of the battery cell. Disclosure of utility model The utility model aims to solve the problem that the coating surface density of a lithium battery pole piece is inconsistent due to uneven coating pressure (namely inconsistent transverse pressure in a coating cavity) when a current coating die head is coated, so that the consistency of the capacity and performance of a battery core is affected. In order to achieve the above purpose, the utility model is realized by the following technical scheme: The utility model designs a coating die head capable of detecting and adjusting the pressure of a coating cavity in a partitioning way, which comprises: An upper die head; the lower die head is arranged below the upper die head, a coating cavity and a slurry feeding pipe communicated with the coating cavity are arranged in the lower die head; The coating gasket is provided with a plurality of slurry discharge holes, the coating gasket is arranged between the upper die head and the lower die head, the upper die head, the coating gasket and the lower die head are enclosed to form a slurry coating runner, the coating cavity is communicated with the discharge holes, the discharge holes are communicated with the coating runner, and the end part of the coating runner forms a slurry coating hole; The pressure regulating blocks are formed by splicing a plurality of sub-pressure regulating blocks with the same or different sizes, are arranged below the coating gasket and correspond to the positions of the discharge holes on the coating gasket, and are also positioned in the coating cavity; And the cavity pressure sensors are arranged on the upper die head and/or the lower die head, and the cavity pressure sensors are respectively used for detecting the pressure corresponding to each discharge hole in the coating cavity. Furthermore, the coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioned mode is characterized in that the coating cavity is of a hemispherical structure. Furthermore, the coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning way is characterized in that a plurality of connecting holes are further formed in the coating gasket, and the upper die head and the lower die head clamp the coating gasket through fixing bolts and the connecting holes. Further, the coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning mode comprises a gasket body, wherein the gasket body is provided with a first direction and a second direction which are perpendicular to each other, a plurality of sequentially arranged discharge holes are arranged on the gasket body along the first direction, and the opening direction of the discharge holes is the second direction. Furthermore, the thickness of the gasket body is 0.1-2.0 mm. Further, the coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning mode is characterized in that the plurality of sub-pressure adjusting blocks have the same or different widths in the second direction and have the same or different lengths in the first direction. Furthermore, the coating die head capable of detecting and adjusting the pressure of the coating cavity in a partitioning way is characterized in that the materials of the plurali