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CN-224230587-U - Pole piece drying device

CN224230587UCN 224230587 UCN224230587 UCN 224230587UCN-224230587-U

Abstract

The utility model belongs to the technical field of pole piece production, and particularly relates to a pole piece drying device which comprises two power supply units, wherein the power supply units comprise a power supply module and guide rollers, the two ends of each guide roller are respectively provided with a conductive part which is contacted with the two ends of each pole piece along a first direction, the power supply module, the conductive parts and the pole pieces are communicated to form a first power supply loop, the two power supply units are respectively arranged on the two sides of each pole piece along a second direction and are respectively used for alternately supplying power to the two sides of each pole piece.

Inventors

  • WU YUXUAN
  • WANG GANGQING
  • YU ZHAOYU

Assignees

  • 瑞浦兰钧能源股份有限公司

Dates

Publication Date
20260512
Application Date
20250610

Claims (10)

  1. 1. A pole piece drying device, the pole piece comprising an empty foil area (5) and a coating area (6), characterized in that the drying device comprises: The two power supply units comprise a power supply module (1) and guide rollers (2) electrically connected with the power supply module (1), wherein conductive parts (3) which are in contact with empty foil areas (5) at two ends of the pole piece along a first direction (Y) are arranged at two ends of each guide roller (2), and the conductive parts (3) are intermittently and electrically connected with the empty foil areas (5); The two power supply units are respectively arranged at two sides of the pole piece along the second direction (Z), and when one power supply unit is electrically connected with the empty foil area (5) of the pole piece, the other power supply unit is not electrically conductive with the empty foil area (5) of the pole piece; the current flowing through the pole pieces by the two power supply units is opposite in direction.
  2. 2. The pole piece drying device according to claim 1, characterized in that the guide roller (2) further comprises: And an insulating part (4), wherein the two conductive parts (3) are arranged at two ends of the insulating part (4) along the first direction (Y).
  3. 3. The pole piece drying device according to claim 2, characterized in that the conductive part (3) comprises: a conductive shaft (31), the conductive shaft (31) being provided on both ends of the insulating portion (4) in the first direction (Y); And a conductive terminal (32), wherein the conductive terminal (32) is arranged on the circumference side of the conductive shaft (31).
  4. 4. A pole piece drying device according to claim 3, characterized in that the radial radius of the conductive shaft (31) is smaller than the radial radius of the insulating part (4).
  5. 5. Pole piece drying device according to claim 4, characterized in that the end of the conductive terminal (32) in the radial direction of the conductive shaft (31) is flush with the peripheral side of the insulating part (4).
  6. 6. A pole piece drying device according to claim 3, characterized in that the number of conductive terminals (32) is several.
  7. 7. The pole piece drying device according to claim 6, wherein a plurality of the conductive terminals (32) are arranged in an annular array along the circumferential side of the conductive shaft (31).
  8. 8. The pole piece drying device according to claim 6, wherein the conductive part (3) further comprises: The insulating cover (33) is sleeved on the conductive shaft (31), and a plurality of conductive openings (34) are formed in the insulating cover (33); Wherein, a plurality of conductive terminals (32) extend out of the insulating cover (33) through the conductive openings (34).
  9. 9. Pole piece drying device according to claim 1, further comprising an electrical slip ring module, through which the power supply module (1) is rotatably connected with the conductive shaft (31).
  10. 10. Pole piece drying device according to claim 1, characterized in that the power supply module (1) is a direct current power supply.

Description

Pole piece drying device Technical Field The utility model belongs to the technical field of pole piece production, and particularly relates to a pole piece drying device. Background In the manufacturing process of the battery, it is necessary to bake the electrode sheet to remove the moisture in the electrode sheet as much as possible. At present, the baking of the pole piece is mainly completed in two links, one link is that the pole piece is baked after coating is completed, the other link is that the pole piece is baked after the battery cell is formed and is put into a shell, and the two baking links are used for discharging the moisture in the pole piece to the greatest extent. At present, as the performance requirement on the battery is continuously improved, the compaction density of the pole piece is also continuously improved, and the improvement of the compaction density influences the discharge of moisture in the pole piece during baking, thereby influencing the production quality of the battery. Disclosure of utility model The utility model aims at solving the technical problems and provides a pole piece drying device which is used for solving the technical problems. In view of this, the present utility model provides a pole piece drying device, the pole piece including an empty foil region and a coating region, the drying device comprising: The two power supply units comprise a power supply module and guide rollers electrically connected with the power supply module, wherein conductive parts which are in contact with the empty foil areas at the two ends of the pole piece along the first direction are arranged at the two ends of the guide rollers, and the conductive parts are intermittently electrically connected with the empty foil areas; The two power supply units are respectively arranged at two sides of the pole piece along the second direction, and when one power supply unit is electrically connected with the empty foil area of the pole piece, the other power supply unit is not electrically conductive with the empty foil area of the pole piece; the current flowing through the pole pieces by the two power supply units is opposite in direction. Further, the guide roller further comprises: And the insulating parts are arranged at two ends of the insulating part along the first direction. Further, the conductive portion includes: conductive shafts disposed on both ends of the insulating portion in the first direction; And the conductive terminal is arranged on the periphery side of the conductive shaft. Further, the radial radius of the conductive shaft is smaller than the radial radius of the insulating portion. Further, the end of the conductive terminal in the radial direction of the conductive shaft is flush with the peripheral side of the insulating portion. Further, the number of the conductive terminals is a plurality of. Further, the plurality of conductive terminals are arranged in an annular array along the peripheral side of the conductive shaft. Further, the conductive part further includes: the insulating cover is sleeved on the conductive shaft and provided with a plurality of conductive openings; wherein, a plurality of conductive terminals extend out of the insulating cover through the conductive openings. Further, the electric slip ring type electric motor further comprises an electric slip ring module, and the power supply module is rotatably connected with the conductive shaft through the electric slip ring module. Further, the power supply module is a direct current power supply. One of the above technical solutions has the following beneficial effects: the conductive part is arranged in the empty foil area of the pole piece, so that the pole piece is electrified to generate Joule heat, and the heat is transferred from the current collector side of the pole piece to the side direction of the active material coated on the current collector, so that the drying mode from inside to outside is realized, and the water discharge of the pole piece under high compaction density can be met. And the two power supply units alternately output currents with opposite currents to the surface of the pole piece, so that the conductive environment of alternating current is simulated, the resistance of the current collector is improved by the pole piece due to the skin effect, the heat generation amount of Joule heat is further increased in unit time, and the drying effect of the pole piece is further improved. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a schematic view of the structure of the guide roller of the present utility model; FIG. 3 is a schematic view of the structure of the present utility model at a certain view angle; FIG. 4 is a schematic view of the structure of the guide roller of the present utility model when used as a pull-through roller; the label in the figure is: 1. A power supply module; 2, a guide roller, 3, a conduc