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CN-224217464-U - Auxiliary device for uniformly coating composite anode powder

CN224217464UCN 224217464 UCN224217464 UCN 224217464UCN-224217464-U

Abstract

The utility model discloses an auxiliary device for uniformly coating composite anode powder, and relates to the technical field of solid-state battery assembly assistance. Including supporting the base, be provided with the complementary unit who is used for evenly coating compound positive pole powder on the support base, complementary unit includes: the operation assembly comprises an inner cavity arranged in the support base, a battery mould inner core is slidably arranged in the inner cavity, a first penetrating cavity is arranged in the battery mould inner core, the support base, the battery mould inner core, the composite anode mould, the long ejector rod and the short ejector rod are coaxial, thereby ensuring the smooth transfer of the positive electrode powder coating layer from the composite positive electrode die to the inner core direction of the battery die, realizing the uniform coating of the positive electrode powder, avoiding the problems that the coverage and uniformity of the positive electrode powder coating layer are difficult to ensure, the solid electrolyte ceramic layer is damaged and the like, and avoiding uneven stress caused by different axial compression.

Inventors

  • WANG SHUO
  • JIN TINGWU
  • ZHOU RUIHUA
  • HUANG XUEHUI

Assignees

  • 桐乡市前沿新材料研究院
  • 武汉理工大学

Dates

Publication Date
20260508
Application Date
20250417

Claims (6)

  1. 1. The auxiliary device for uniformly coating the composite anode powder comprises a supporting base (1) and is characterized in that an auxiliary mechanism for uniformly coating the composite anode powder is arranged on the supporting base (1), and the auxiliary mechanism comprises: The operation assembly comprises an inner cavity (5) formed in the support base (1), a battery mold inner core (3) is arranged in the inner cavity (5) in a sliding mode, a first penetrating cavity (301) is formed in the battery mold inner core (3), a composite positive electrode mold (2) is arranged on the lower end face of the support base (1), a second penetrating cavity (4) is formed in the composite positive electrode mold (2), and a long ejector rod (403) is arranged in the second penetrating cavity (4); The locking assembly comprises second connecting blocks (203) fixed on two sides of the composite positive electrode die (2), and locking brackets (204) connected through rotation of a rotation shaft are arranged on the side walls of the second connecting blocks (203).
  2. 2. The auxiliary device for uniformly coating the composite anode powder according to claim 1, wherein the diameter of the inner core (3) of the battery die is consistent with the diameter of the inner cavity (5) of the supporting base (1), and the matching tolerance is met.
  3. 3. The auxiliary device for uniformly coating the composite anode powder according to claim 1, wherein a groove step (7) is arranged at the edge of the lower part of the supporting base (1), a boss (8) is arranged at the upper half part of the composite anode die (2), and the depth of the groove step (7) is consistent with the height of the boss (8) at the upper half part of the composite anode die (2).
  4. 4. The auxiliary device for uniformly coating the composite anode powder according to claim 1, wherein the height of the battery die inner core (3) is equal to the depth of the inner cavity (5), a first thread groove (401) is formed below the inner wall of the second penetrating cavity (4), a thread ring (404) in threaded connection with the first thread groove (401) is arranged on the outer wall of the long ejector rod (403), a second thread groove (402) is formed in the inner wall of the upper end of the second penetrating cavity (4), and the second thread groove (402) is in threaded connection with the short ejector rod (6).
  5. 5. The auxiliary device for uniformly coating the composite anode powder according to claim 1, wherein the locking support (204) is of an L-shaped structure, bolts (205) are arranged on the locking support (204), locking blocks (101) are fixed on two sides of the supporting base (1), and the bolts (205) are in threaded connection with the locking blocks (101).
  6. 6. The auxiliary device for uniformly coating the composite anode powder according to claim 1, wherein the front wall and the rear wall of the supporting base (1) are fixedly provided with positioning blocks (102), positioning holes (103) are formed in the positioning blocks (102), the front wall and the rear wall of the composite anode die (2) are fixedly provided with first connecting blocks (201), the upper ends of the first connecting blocks (201) are fixedly provided with positioning rods (202), and the positioning rods (202) are in size fit with the positioning holes (103).

Description

Auxiliary device for uniformly coating composite anode powder Technical Field The utility model relates to the technical field of solid-state battery assembly assistance, in particular to an auxiliary device for uniformly coating composite anode powder. Background In the assembly process of the solid-state battery, a solid-state electrolyte ceramic sheet is generally pressed in advance in a battery die inner core, and then anode powder and a lithium indium metal negative plate are sequentially coated on two sides of the ceramic sheet. In general, the current positive electrode powder coating operation is to spread the composite positive electrode powder on a solid electrolyte ceramic sheet, then manually spin-coat the solid electrolyte ceramic sheet by using a pressing structure, and then cold-press the solid electrolyte ceramic sheet to obtain a composite positive electrode layer. Based on the above, the existing positive electrode powder coating operation has the following problems: 1. The strength is not easy to control when the pressure structure is directly used for spin coating, and the positive electrode powder coating layer is difficult to ensure to completely cover the surface of the solid electrolyte ceramic, and the uniformity of thickness and quality is difficult to ensure; 2. If the force is too large in the spin coating process, the pressed solid electrolyte ceramic layer can be damaged, and the performance of the solid battery is further influenced. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a composite anode powder uniform coating auxiliary device, which solves the problems that the strength is difficult to control when a pressing structure is directly used for spin coating, the anode powder coating layer is difficult to ensure to completely cover the surface of solid electrolyte ceramic, the uniformity of thickness and quality and the force used in the spin coating process are overlarge, the pressed solid electrolyte ceramic layer is possibly damaged, and the performance of a solid battery is further influenced. In order to achieve the purpose, the auxiliary device for uniformly coating the composite anode powder comprises a support base, wherein an auxiliary mechanism for uniformly coating the composite anode powder is arranged on the support base, and comprises: The operation assembly comprises an inner cavity formed in the support base, a battery mold inner core is arranged in the inner cavity in a sliding mode, a first penetrating cavity is formed in the battery mold inner core, a composite positive electrode mold is arranged on the lower end face of the support base, a second penetrating cavity is formed in the composite positive electrode mold, and a long ejector rod is arranged in the second penetrating cavity; the locking assembly comprises second connecting blocks fixed on two sides of the composite positive electrode die, and locking brackets rotationally connected through rotating shafts are arranged on the side walls of the second connecting blocks. Preferably, the diameter of the inner core of the battery mould is consistent with the diameter of the inner cavity of the supporting base, and the matching tolerance is met. Preferably, a groove step is arranged at the edge of the lower part of the supporting base, a boss is arranged at the upper half part of the composite positive electrode die, and the depth of the groove step is consistent with the height of the boss at the upper half part of the composite positive electrode die. Preferably, the height of the battery die inner core is equal to the depth of the inner cavity, a first thread groove is formed below the inner wall of the second penetrating cavity, a thread ring in threaded connection with the first thread groove is arranged on the outer wall of the long ejector rod, a second thread groove is formed in the inner wall of the upper end of the second penetrating cavity, and the second thread groove is in threaded connection with the short ejector rod. Preferably, the locking support is of an L-shaped structure, bolts are arranged on the locking support, locking blocks are fixed on two sides of the supporting base, and the bolts are in threaded connection with the locking blocks. Preferably, the front wall and the rear wall of the support base are fixed with positioning blocks, positioning holes are formed in the positioning blocks, the front wall and the rear wall of the composite positive electrode die are fixed with first connecting blocks, the upper ends of the first connecting blocks are fixed with positioning rods, and the positioning rods are in size fit with the positioning holes. Advantageous effects The utility model provides an auxiliary device for uniformly coating composite anode powder. Compared with the prior art, the method has the following beneficial effects: Firstly, the utility model realizes the coating of the composite anode powder by a mechanized sc