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CN-121988827-A - Pole piece processing device and battery production system

CN121988827ACN 121988827 ACN121988827 ACN 121988827ACN-121988827-A

Abstract

The application relates to a pole piece processing device and a battery production system. The pole piece processing device comprises a pole piece transfer mechanism, a discharge mechanism, an arc constraint cover and a negative pressure mechanism, wherein the pole piece transfer mechanism is used for conveying a pole piece to be processed along a first direction. The discharge mechanism comprises a high-voltage generator and a discharge body, wherein the high-voltage generator is electrically connected with the discharge body, the discharge body is arranged on one side of the pole piece along the second direction and is provided with a discharge tip, and the discharge tip is arranged towards the edge of the pole piece. The arc restraining cover is at least provided with a discharge tip, and is provided with an avoidance port for the passage of an arc of the discharge tip. The negative pressure mechanism is configured to generate a negative pressure within the arc-restricting cover. The arc generated by the discharge tip is restrained by the arc restraining cover, the problem of arc deflection caused by movement of the pole piece is relieved, and suction is applied to the arc by the negative pressure mechanism, so that forward deflection of the arc is further reduced, the stability of the arc is improved, and the arc can stably burn burrs.

Inventors

  • LUO WEIJIE

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (17)

  1. 1. A pole piece handling device, characterized in that the pole piece handling device comprises: A pole piece transfer mechanism (6) for conveying a pole piece (100) to be processed in a first direction; The discharging mechanism (1) comprises a high-voltage generator (11) and a discharging body (12), wherein the high-voltage generator (11) is electrically connected with the discharging body (12), the discharging body (12) is arranged on one side of the pole piece (100) along a second direction, the discharging body (12) is provided with a discharging tip (121), and the discharging tip (121) is arranged towards the edge of the pole piece (100), and the second direction is perpendicular to the first direction; An arc restraint cover (2) at least covering the discharge tip (121), wherein the arc restraint cover (2) is provided with an avoidance port (211) for the passage of an arc of the discharge tip (121); and a negative pressure mechanism configured to generate a negative pressure in the arc-restricting cover (2).
  2. 2. The pole piece treatment device according to claim 1, wherein a plurality of discharge bodies (12) are arranged at intervals along the first direction, the discharge tip (121) of each discharge body (12) is arranged to extend along the second direction, and the avoiding opening (211) is arranged on the surface of the arc constraint cover (2) facing the pole piece (100).
  3. 3. Pole piece treatment device according to claim 2, characterized in that the discharge body (12) is in intermittent electrical communication with the high voltage generator (11).
  4. 4. A pole piece treatment device according to claim 3, characterized in that the discharge mechanism (1) further comprises a switching regulator for regulating the electrical circuit connection of the discharge body (12) to the high voltage generator (11).
  5. 5. Pole piece handling device according to claim 4, characterized in that each of the discharge bodies (12) is provided with the switching regulator individually for individually regulating the electrical circuit switching of each discharge body (12) with the high voltage generator (11).
  6. 6. The pole piece treatment device according to any one of claims 1 to 5, wherein the arc-restricting cover (2) is provided with a negative pressure interface (212), and the negative pressure mechanism is communicated with the inside of the arc-restricting cover (2) through the negative pressure interface (212).
  7. 7. The pole piece treatment device according to claim 6, characterized in that the negative pressure interface (212) is arranged at an end of the arc-restricting cover (2) remote from the avoidance opening (211).
  8. 8. The pole piece treatment device according to any one of claims 1 to 5, further comprising: The monitoring module (3) is arranged on one side of the discharge body (12) and is configured to capture the position of the object to be cleaned on the pole piece (100) to be processed, and when the monitoring module (3) detects that the object to be cleaned arrives, the discharge body (12) starts discharge.
  9. 9. Pole piece handling device according to claim 8, characterized in that, when a plurality of discharge bodies (12) are provided, the monitoring module (3) is provided at the rear end of each discharge body (12) in the first direction.
  10. 10. The pole piece treatment device according to any one of claims 1 to 5, wherein the inner diameter of the avoiding opening (211) gradually increases from one side close to the inner space of the arc-restricting cover (2) to the outside.
  11. 11. The pole piece treatment device according to any one of claims 1 to 5, characterized in that the arc-restricting cover (2) protrudes from the discharge tip (121) along the extension direction of the discharge tip (121).
  12. 12. The pole piece processing device according to claim 11, characterized in that the arc restraining cover (2) is provided with a distance L between the outer surface of the avoidance opening (211) and the discharge tip (121), and the value range of the distance L is set to 0.5 mm-10 mm.
  13. 13. The pole piece treatment device according to any one of claims 1 to 5, wherein the arc-restricting cover (2) comprises a restricting cover body (21) and a heat dissipating member (22), the restricting cover body (21) is covered on the discharge body (12), the restricting cover body (21) is provided with the avoiding opening (211), and the heat dissipating member (22) is arranged on the outer side surface of the restricting cover body (21).
  14. 14. The pole piece processing device according to claim 13, wherein the heat dissipation member (22) includes a plurality of heat dissipation rings (221), the heat dissipation rings (221) are sleeved on the constraint cover main body (21), and the plurality of heat dissipation rings (221) are arranged at intervals along the extending direction of the constraint cover main body (21).
  15. 15. The pole piece treatment device according to any one of claims 1 to 5, wherein the discharge tip (121) is configured as a conical structure, and the taper angle θ is set to 3 ° to 85 °.
  16. 16. The pole piece treatment device according to any one of claims 1 to 5, characterized in that the discharge voltage U of the discharge body (12) is set to a value range of 200 to 2000v.
  17. 17. A battery production system comprising a pole piece handling device according to any one of claims 1 to 16.

Description

Pole piece processing device and battery production system Technical Field The application relates to the technical field of batteries, in particular to a pole piece processing device and a battery production system. Background The pole piece is usually die-cut in the forming process, and sharp burrs are inevitably formed at the edge of the die-cut pole piece. The burrs easily pierce the diaphragm and overlap the other pole piece, so that the battery cell is self-discharged or short-circuited, the performance of the battery cell is reduced, and even thermal runaway is caused. The traditional method for deburring the edge of the pole piece adopts an alkaline atomization mode to melt burrs, and firstly, the mode has the problem of environmental pollution, and atomized matters can pollute workshops or equipment. Secondly, the dissolution time of burrs of different sizes is inconsistent, and the possibility of wasting alkaline materials or incomplete dissolution of burrs exists. Disclosure of Invention In view of the above problems, the application provides a pole piece processing device and a battery production system, which can relieve the problems of environmental pollution and incomplete burr removal when pole piece burrs are removed. In a first aspect, the present application provides a pole piece handling device comprising: The pole piece transfer mechanism is used for conveying the pole piece to be processed along the first direction; The discharge mechanism comprises a high-voltage generator and a discharge body, wherein the high-voltage generator is electrically connected with the discharge body, the discharge body is arranged at one side of the pole piece along the second direction and is provided with a discharge tip, and the discharge tip is arranged towards the edge of the pole piece; the arc constraint cover is at least provided with a discharge tip, and is provided with an avoidance port for the passage of an arc of the discharge tip; And a negative pressure mechanism configured to generate a negative pressure in the arc-restricting cover. According to the pole piece treatment device provided by the embodiment of the application, the pole piece to be treated is conveyed in the front-rear direction by arranging the pole piece conveying mechanism, and the edge of the pole piece in conveying is subjected to arc burning by arranging the discharging mechanism, so that burrs are melted under high-temperature burning, and the purpose of removing the burrs is achieved. By arranging the discharge mechanism to comprise a high voltage generator and a discharge body, a high voltage is supplied to the discharge body by the high voltage generator. The discharge body is provided with a discharge tip, the discharge tip is arranged towards the edge of the pole piece, and the discharge tip is easier to trigger air ionization under the action of high pressure to form a plasma channel, so that the plasma channel reacts with metal burrs at high temperature. Further cover the discharge body through setting up the electric arc constraint cover and establish, make the electric arc constraint cover at least and establish the point portion of discharging, retrain the electric arc that discharges the point portion and send through the electric arc constraint cover, alleviate the electric arc skew problem that arouses because of the pole piece removes to improve electric arc stability, thereby make electric arc can stabilize the burning to the burr. Through setting up negative pressure mechanism, form the negative pressure environment in the electric arc restraint cover to apply the suction to the electric arc, this suction direction is opposite to the forward gravitation that the pole piece moved forward to the electric arc produced, thereby can reduce the skew forward of electric arc, further makes electric arc can burn the burr more steadily continuously, and then reduces the emergence of missing the burr condition. In addition, the application replaces the traditional alkaline atomization mode by adopting a high-voltage arc burning mode, thereby being beneficial to reducing environmental pollution and saving alkaline materials. In other embodiments, a plurality of discharge bodies are arranged at intervals along the first direction, the discharge tips of the discharge bodies extend along the second direction, and the avoiding openings are arranged on the surface of the arc constraint cover facing the pole pieces. According to the pole piece processing device provided by the embodiment of the application, due to the arrangement of the plurality of discharge bodies, when burrs are missed by the rear discharge bodies, the front discharge bodies can compensate and the missed burrs are removed. In other embodiments, the discharge is in intermittent electrical communication with the high voltage generator. By the arrangement, each discharge body can be alternately discharged, and the discharge bodies can be cooled when the po