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CN-224212769-U - Coating apparatus

CN224212769UCN 224212769 UCN224212769 UCN 224212769UCN-224212769-U

Abstract

The utility model provides coating equipment which comprises a back roller, a coating mechanism and a coating mechanism, wherein the back roller can rotate around an axis of the back roller to drive a substrate, the coating mechanism is arranged at intervals with the back roller and comprises a melting device, a feeding device and a coating die head, one end of the feeding device is communicated with the melting device, and the other end of the feeding device is communicated with the coating die head. According to the coating equipment, the solid lithium material can be melted into the liquid lithium material through the coating mechanism, and the liquid lithium material can be coated on the surface of the substrate to form a film directly, so that the lithium metal and the substrate can be tightly combined, the coating amount and the film forming thickness of the liquid lithium material can be accurately controlled, the lithium metal can be uniformly distributed on the surface of the substrate, the consistency of the thickness of the lithium metal can be effectively improved, and the stability and the service life of the battery are effectively improved.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 无锡先导智能装备股份有限公司

Dates

Publication Date
20260508
Application Date
20250513

Claims (12)

  1. 1. A coating apparatus, characterized by comprising: The back roller can rotate around the axis of the back roller; the coating mechanism is arranged at intervals with the back roller and comprises a melting device, a feeding device and a coating die head; One end of the feeding device is communicated with the melting device, and the other end of the feeding device is communicated with the coating die head.
  2. 2. The coating apparatus according to claim 1, wherein a coating lip of the coating die faces an outer peripheral surface of the back roller.
  3. 3. The coating apparatus of claim 1, wherein the melt device comprises: a material melting barrel, wherein a material outlet of the material melting barrel is communicated with the material feeding device, and the material melting barrel is provided with a first heating part; the filter screen is arranged in the melting barrel.
  4. 4. The coating apparatus of claim 3 wherein the screen is spaced from a discharge port of the melt bucket.
  5. 5. The coating apparatus according to claim 1, wherein the feeding device is provided with a second heating section; and/or the coating die head is provided with a third heating part.
  6. 6. The coating apparatus of claim 1 wherein the feed device communicates with the coating die through a connecting segment, the coating mechanism further comprising: and the control valve is arranged on the connecting section.
  7. 7. The coating apparatus of claim 1, wherein the feeding device is configured as a screw pump or an electromagnetic pump.
  8. 8. The coating apparatus of claim 1, wherein a width of a coating lip of the coating die is adjustable.
  9. 9. The coating apparatus of claim 1, further comprising: And the moving device is provided with a moving part which moves along the radial direction of the back roller, and the coating mechanism is arranged on the moving part.
  10. 10. Coating apparatus according to claim 9, wherein the moving means comprises: A moving plate formed to a moving part; The movable plate is movably arranged on the base; and the wedge block driving assembly is connected with the moving plate.
  11. 11. The coating apparatus of claim 1, further comprising: and the cooling system is internally provided with a runner which is communicated with the cooling system.
  12. 12. The coating apparatus of claim 1, further comprising: The back roller and the coating mechanism are arranged in the inert gas box.

Description

Coating apparatus Technical Field The utility model relates to the technical field of lithium battery production, in particular to coating equipment. Background In the production of lithium batteries, the preparation of lithium metal anode materials is one of the key links. The conventional process generally adopts a rolling mode to compound the solid lithium foil with a base material so as to prepare the lithium metal anode material. However, the binding force between the lithium metal and the substrate in this process is weak, which easily affects the stability and the service life of the battery. Disclosure of utility model The utility model provides a new technical scheme of coating equipment, which at least can solve the problem of weak binding force between lithium metal of a negative electrode material and a base material in the prior art. According to a first aspect of the utility model, a coating device is provided, comprising a back roller and a coating mechanism, wherein the back roller can rotate around an axis of the back roller, the coating mechanism is arranged at intervals with the back roller, the coating mechanism comprises a melting device, a feeding device and a coating die head, one end of the feeding device is communicated with the melting device, and the other end of the feeding device is communicated with the coating die head. Optionally, a coating lip of the coating die faces an outer circumferential surface of the back roller. Optionally, the melting device comprises a melting barrel, a discharging hole of the melting barrel is communicated with the feeding device, the melting barrel is provided with a first heating part, and a filter screen is arranged in the melting barrel. Optionally, the screen is spaced from a discharge port of the melt bucket. Optionally, the feeding device is provided with a second heating part, and/or the coating die head is provided with a third heating part. Optionally, the feeding device is communicated with the coating die head through a connecting section, and the coating mechanism further comprises a control valve which is arranged on the connecting section. Optionally, the feeding device is configured as a screw pump or an electromagnetic pump. Optionally, the width of the coating lip of the coating die is adjustable. Optionally, the coating equipment further comprises a moving device, wherein the moving device is provided with a moving part moving along the radial direction of the back roller, and the coating mechanism is arranged on the moving part. Optionally, the moving device comprises a moving plate, a base and a wedge driving assembly, wherein the moving plate is formed into a moving part, the moving plate is movably arranged on the base, and the wedge driving assembly is connected with the moving plate. Optionally, the coating equipment further comprises a cooling system, wherein a runner is arranged in the back roller and is communicated with the cooling system. Optionally, the coating equipment further comprises an inert gas box, and the back roller and the coating mechanism are arranged in the inert gas box. According to the coating equipment, the solid lithium material can be melted into the liquid lithium material through the coating mechanism, the liquid lithium material can be coated on the surface of the substrate to form a film directly, compared with the existing rolling compounding process, the coating equipment can enable the lithium metal to be tightly combined with the substrate, the coating amount and the film forming thickness of the liquid lithium material can be accurately controlled, the lithium metal can be uniformly distributed on the surface of the substrate, the consistency of the thickness of the lithium metal can be effectively improved, the stability and the service life of a battery are effectively improved, and the substrate and the lithium metal can be rapidly combined through continuous conveying of the back roller and efficient coating of the coating mechanism, so that the production efficiency can be remarkably improved. Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. Fig. 1 is a schematic structural view of a coating apparatus according to an embodiment provided by the present utility model; Fig. 2 is a schematic structural view of a coating mechanism of a coating apparatus according to an embodiment provided by the present utility model. Reference numerals 100. A coating device; 10. A back roller; 20. Coating mechanism, 21, melting device, 211, melting barrel, 212, filter screen, 22, feeding de