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CN-224232646-U - Pole piece extension device and battery production system

CN224232646UCN 224232646 UCN224232646 UCN 224232646UCN-224232646-U

Abstract

The application discloses a pole piece extending device and a battery production system. The pole piece extending device comprises a calendaring mechanism and a drawing mechanism. The calendaring mechanism has opposite input and output sides, the input side is used for receiving the pole piece of input, support component, backing roll and compression roller subassembly, and backing roll and compression roller subassembly all set up in support component, and compression roller subassembly includes the compression roller, and backing roll and compression roller are configured to the part of co-calendaring pole piece and stay white district. The drawing mechanism is positioned on the output side, the drawing mechanism comprises a drawing roller, the peripheral surface of the drawing roller is provided with a drawing area, the drawing area is configured to draw the blank area remained after calendaring, the peripheral surface of the drawing roller is provided with at least one bulge which surrounds the axis of the drawing roller, the peripheral surface of each bulge is provided with a drawing area, and each bulge corresponds to one compression roller.

Inventors

  • WANG BIN
  • WANG HAN

Assignees

  • 宁德时代新能源科技股份有限公司
  • 宁德时代润智软件科技有限公司

Dates

Publication Date
20260512
Application Date
20260224

Claims (12)

  1. 1. A pole piece extension device, comprising: the rolling mechanism is provided with an input side and an output side which are opposite, the input side is used for receiving an input pole piece, the rolling mechanism comprises a bracket component, a supporting roller and a pressing roller component, the supporting roller and the pressing roller component are arranged on the bracket component, the pressing roller component comprises a pressing roller, and the supporting roller and the pressing roller are configured to jointly roll a part of a blank zone of the pole piece; A drawing mechanism located on the output side, the drawing mechanism including a drawing roller having a drawing region on an outer peripheral surface thereof, the drawing region being configured to draw the blank space remaining after rolling, the drawing roller having at least one projection formed on an outer peripheral surface thereof around an axis of the drawing roller, the drawing region being formed on an outer peripheral surface of each of the projections, each of the projections corresponding to one of the press rollers.
  2. 2. The pole piece stretching device according to claim 1, wherein the number of the press roller assemblies is at least one, each press roller assembly corresponds to one drawing area, the dimension of each blank space for the press roller for the press portion is W1 along the axial direction of the press roller assembly, the dimension of each drawing area is W2, and the ratio of W2/W1 is 1/4~2/3.
  3. 3. The pole piece extending device according to claim 2, wherein the dimension of the blank space of the pole piece is W3 and W1 is configured to be equal to (0.6-0.8) ×w3 along the axial direction of the press roll assembly.
  4. 4. The pole piece stretching device according to claim 2, wherein the number of the drawing areas and the number of the press roll assemblies are plural, the plural drawing areas are arranged at intervals along the axial direction of the press roll assemblies, the plural press roll assemblies are arranged at intervals along the axial direction of the press roll assemblies, the pole piece has plural blank areas arranged at intervals along the axial direction of the press roll assemblies, different press roll assemblies are configured to co-calender a part of the different blank areas with the support rolls, and each drawing area is configured to draw the remaining part of each of the blank areas after calendering.
  5. 5. A pole piece extension device as claimed in any one of claims 1 to 4, wherein the support member is rotatably connected to the support roller, the press roller assembly being slidably connected to the support member in a first direction, the press roller assembly being arranged to be driven for co-calendaring a portion of the blank space with the support roller, the first direction intersecting an axial direction of the press roller assembly.
  6. 6. The pole piece extension device of claim 5, wherein the calendaring mechanism further comprises: The hydraulic driving assembly comprises a hydraulic actuating mechanism and a gas-liquid pressurizing mechanism, a pressurizing oil port of the gas-liquid pressurizing mechanism is communicated with an oil inlet of the hydraulic actuating mechanism, the hydraulic actuating mechanism is in driving connection with the press roller assembly, and the hydraulic actuating mechanism is used for driving the press roller assembly to move along the first direction relative to the support roller.
  7. 7. The pole piece extension device according to claim 6, wherein the number of the press roller assemblies is multiple, the multiple press roller assemblies are arranged at intervals along the axial direction of the supporting roller, the number of the hydraulic actuating mechanisms is multiple, the multiple hydraulic actuating mechanisms are arranged at intervals along the axial direction of the supporting roller, each hydraulic actuating mechanism is in driving connection with one press roller assembly, each hydraulic actuating mechanism corresponds to one gas-liquid pressurizing mechanism, and the hydraulic actuating mechanisms are communicated with the pressurizing oil ports of each gas-liquid pressurizing mechanism.
  8. 8. The pole piece stretching device according to claim 7, wherein the calendaring mechanism further comprises regulating valves, the air inlet ports of each air-liquid pressurizing mechanism are connected with the regulating valves, air inlets of the regulating valves are communicated with each other, and the regulating valves are used for regulating air flow and/or flow rate of the air inlet ports.
  9. 9. The pole piece extension device of claim 5, wherein the calendaring mechanism further comprises: A guide member through which the platen assembly is slidably connected to the frame member in the first direction; and one end of the elastic piece is abutted with the guide piece, the other end of the elastic piece is abutted with the bracket component, and the elastic force of the elastic piece has the tendency of enabling the compression roller assembly to move away from the supporting roller.
  10. 10. A pole piece extension device according to any of claims 1-4, wherein the calendaring mechanism further comprises: And the tension roller assembly is arranged on the bracket component, is positioned at the downstream of the compression roller assembly and the upstream of the drawing mechanism, and is used for providing tension for the pole piece.
  11. 11. The pole piece extension device of claim 10, wherein the tension roller assembly comprises: The swinging member is rotationally connected with the bracket member around a first axis; a tension roller connected to the swing member, the tension roller having an axis parallel to the first axis; a force applying part connected with the swing component, The force application component is used for driving the swinging component to rotate relative to the bracket component.
  12. 12. A battery production system comprising a pole piece extension device as claimed in any one of claims 1 to 11.

Description

Pole piece extension device and battery production system Technical Field The application relates to the technical field of battery manufacturing, in particular to a pole piece extending device and a battery production system. Background The pole piece is a carrier for chemical reaction of the battery, the pole piece is required to be completed in the charging and discharging process of the battery, and the surface of a foil (current collector) is usually required to be coated with an active material layer in the preparation process of the pole piece, and the active material layer is subjected to drying and extension treatment. At present, the existing technical problems are that the pole piece is easy to break in the extending process, so that the direct loss of pole piece raw materials is easy to be caused, and the subsequent production efficiency is also influenced. Disclosure of utility model In view of the above problems, the present application provides a pole piece extending device and a battery production system, which are capable of reducing the occurrence of breakage in the pole piece extending process by rolling a part of the blank area of the pole piece and then drawing the remaining part. In a first aspect, the present application provides a pole piece extension device comprising: The rolling mechanism is provided with an input side and an output side which are opposite, the input side is used for receiving an input pole piece, the rolling mechanism comprises a bracket component, a supporting roller and a pressing roller component, the supporting roller and the pressing roller component are both arranged on the bracket component, the pressing roller component comprises a pressing roller, and the supporting roller and the pressing roller are configured to jointly roll part of a blank area of the pole piece; the drawing mechanism is positioned on the output side and comprises a drawing roller, the outer peripheral surface of the drawing roller is provided with a drawing area, the drawing area is used for drawing the blank area remained after calendaring, the outer peripheral surface of the drawing roller is provided with at least one bulge which surrounds the axis of the drawing roller, the outer peripheral surface of each bulge is provided with a drawing area, and each bulge corresponds to one compression roller. In addition, the protrusion can enable the pole piece to extend outwards so as to realize drawing, so that the pole piece can be fully extended to release stress after being rolled, and the situation that the blank zone of the pole piece is wrinkled is reduced. In some embodiments, the number of the press roll assemblies is at least one, each press roll assembly corresponds to one drawing area, the dimension of the blank space for the press roll portion is W1 along the axial direction of the press roll assemblies, the dimension of each drawing area is W2, and the ratio of W2/W1 is 1/4~2/3. Therefore, the area of the blank area of the rolled pole piece is larger than that of the blank area of the drawn pole piece, on one hand, the stress of the pole piece after coating can be more fully released, the conditions of wrinkling, cracking and the like caused by stress concentration after the pole piece is coated are reduced, and meanwhile, the condition of broken belt caused by overlarge extrusion stress can be also reduced. In some embodiments, the dimension of the blank space of the pole piece along the axial direction of the press roll assembly is W3, and W1 is configured to be equal to (0.6-0.8) x W3. Therefore, the situation of broken belt of the pole piece caused by overlarge extrusion stress can be reduced in the calendaring process, and meanwhile, the coated pole piece can release stress more fully. In some embodiments, the number of draw zones and the number of press roll assemblies are each a plurality, the plurality of draw zones being spaced apart along the axial direction of the press roll assemblies, the plurality of press roll assemblies being spaced apart along the axial direction of the press roll assemblies, the pole piece having a plurality of blank zones spaced apart along the axial direction of the press roll assemblies, different press roll assemblies being configured to co-calender a portion of the different blank zones with the support rolls, each draw zone being configured to draw a remaining portion of each of the blank zones after calendering. The multiple press roll assemblies and the multiple blank areas are subjected to one-to-one partition rolling, so that the condition of uneven local extrusion stress caused by centralized rolling of all the blank areas by a single set of press rolls can be reduced, the extrusion expansion force of each blank area can be adapted to the partial area of each blank area, and the internal stress of the area after coating is fully released. In some embodiments, the support member is rotatably coupled to the support roller, and the p