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CN-224222322-U - Integrated roll forming device for lithium cobalt oxide positive plate

CN224222322UCN 224222322 UCN224222322 UCN 224222322UCN-224222322-U

Abstract

The utility model relates to the technical field of battery processing, in particular to an integrated rolling forming device for a lithium cobalt oxide positive plate, which comprises an unreeling mechanism, a rolling mechanism and a reeling mechanism which are sequentially arranged, wherein a pole piece released by the unreeling mechanism is rolled by the reeling mechanism after being rolled by the rolling mechanism, the rolling mechanism is provided with two groups and is sequentially arranged along the conveying direction of the pole piece, each rolling mechanism comprises a supporting roller and an extrusion roller which are mutually matched, the diameter of each supporting roller is unequal to that of each extrusion roller, and the extrusion rollers in the two groups of rolling mechanisms respectively extrude two sides of the pole piece. The integrated rolling forming device for the lithium cobalt oxide positive plate can ensure that the pole piece is rolled compactly and reduce the internal rolling stress of the pole piece.

Inventors

  • Lv Gaizhi
  • HE MINHUA

Assignees

  • 合山市华美新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250711

Claims (9)

  1. 1. The utility model provides an integration roll-in forming device of lithium cobaltate positive plate, includes unreeling mechanism, roll-in mechanism and the roll-in mechanism that sets gradually, the pole piece that unreels the mechanism and roll up by the roll-in mechanism after the roll-in mechanism roll-in, its characterized in that, roll-in mechanism is provided with two sets of and sets gradually along the direction of delivery of pole piece, every roll-in mechanism all includes mutually supporting backing roll and squeeze roll, the diameter of backing roll is unequal with the diameter of squeeze roll, two sets of squeeze roll in the roll-in mechanism extrudees the both sides of pole piece respectively.
  2. 2. The integrated roll forming device of the lithium cobalt oxide positive plate according to claim 1, wherein the ratio of the diameter of the supporting roll to the diameter of the extruding roll is 1:3-5.
  3. 3. The integrated roll forming device of the lithium cobalt oxide positive plate according to claim 1, wherein the roll gap between the supporting roll and the extruding roll in the rolling mechanism of the former group is larger than the roll gap between the supporting roll and the extruding roll in the rolling mechanism of the latter group, and the roll gap between the supporting roll and the extruding roll in the rolling mechanism of the former group and the roll gap between the supporting roll and the extruding roll in the rolling mechanism of the latter group are arranged in a non-coplanar manner.
  4. 4. The integrated roll forming device of lithium cobaltate positive plate according to claim 1, wherein the interval between two sets of roll forming mechanisms is less than 1m.
  5. 5. The integrated roll forming device of the lithium cobalt oxide positive plate according to claim 1, wherein a stable clamping mechanism is arranged between two sets of roll forming mechanisms.
  6. 6. The integrated roll forming device of lithium cobaltate positive plate of claim 5, wherein the stable clamping mechanism comprises a frame body and a pair of stable clamping rollers, both ends of the pair of stable clamping rollers are slidably mounted on the frame body through sliding blocks, a pole piece penetrates through a gap between the pair of stable clamping rollers, and an adjusting bolt for adjusting the sliding position of each sliding block is arranged on the frame body.
  7. 7. The integrated roll-in forming device for lithium cobalt oxide positive electrode sheet according to any one of claims 1 to 6, wherein the unreeling mechanism comprises a frame and a plurality of unreeling shafts rotatably mounted on the frame, a converging roll is arranged on one side of the frame, which is close to the roll-in mechanism, and sheets discharged from all the unreeling shafts bypass the converging roll in the same direction and enter the roll-in mechanism.
  8. 8. The integrated roll forming device of the lithium cobalt oxide positive plate according to claim 7, wherein a plurality of tensioning rolls which are matched with all the unreeling shafts one by one are arranged on the frame.
  9. 9. The integrated roll forming device of lithium cobalt oxide positive plate according to claim 1, wherein a pair of traction pinch rolls matched with each other are arranged between the rolling mechanism and the rolling mechanism of the later group.

Description

Integrated roll forming device for lithium cobalt oxide positive plate Technical Field The utility model relates to the technical field of battery processing, in particular to an integrated roll forming device for a lithium cobalt oxide positive plate. Background The battery pole piece is rolled in the forming process, and the battery material and the base material are combined and compacted after the rolling, wherein the compacted density of the positive electrode material or the negative electrode material directly determines the energy density of the battery. In the rolling process of the battery pole piece, the compaction density can be ensured by increasing the contact area between the battery pole piece and the roller shaft and prolonging the compaction time. Currently, two main ways are adopted in the industry to solve the above-mentioned problems, namely, one way is to increase the diameter of the roll shaft, which is most direct, but due to the limitation of production cost and the manufacturing volume of equipment. The other mode is to realize step by step through a mode of multiple rolling, so that the rolling time is increased, the compacting time is increased, meanwhile, the stress directions of the pole pieces are different through multiple rolling, and the problem of uneven stress distribution caused in the previous rolling process of the pole pieces is relieved to a certain extent. However, this method also has a certain problem, because the conventional roll shafts are mostly parallel to each other and have structures with equal diameters, the two sides of the pole piece are the same in size and direction of each stress due to the same contact area in the rolling process, and the internal stress generated in the process of the next rolling of the pole piece still exists. Therefore, a roll forming device capable of ensuring the rolling compaction of the pole piece and reducing the internal rolling stress of the pole piece is needed to solve the problems. Disclosure of utility model In order to overcome one of the defects in the prior art, the utility model aims to provide the integrated rolling forming device for the lithium cobalt oxide positive plate, which not only can ensure the rolling compaction of the pole piece, but also can reduce the internal rolling stress of the pole piece. In order to solve the problems, the technical scheme adopted by the utility model is as follows: The utility model provides an integration roll-in forming device of lithium cobaltate positive plate, includes unreeling mechanism, roll-in mechanism and the roll-in mechanism that sets gradually, the pole piece that unreels the mechanism and emit is rolled up by the roll-in mechanism after the roll-in mechanism roll-in, roll-in mechanism is provided with two sets of and sets gradually along the direction of delivery of pole piece, every roll-in mechanism all includes backup roll and squeeze roll that mutually support roll's diameter and squeeze roll's diameter inequality, two sets of squeeze roll in the roll-in mechanism extrudees the both sides of pole piece respectively. Further, the ratio of the diameter of the supporting roller to the diameter of the extruding roller is 1:3-5. Further, the roll gap between the supporting roll and the squeeze roll in the rolling mechanism is larger than the roll gap between the supporting roll and the squeeze roll in the rolling mechanism in the former group, and the roll gap between the supporting roll and the squeeze roll in the rolling mechanism in the former group and the roll gap between the supporting roll and the squeeze roll in the rolling mechanism in the latter group are arranged in a non-coplanar manner. Further, the interval between the two sets of rolling mechanisms is less than 1m. Further, a stable clamping mechanism is arranged between the two groups of rolling mechanisms. Further, the stable clamping mechanism comprises a frame body and a pair of stable clamping rollers, two ends of each pair of stable clamping rollers are slidably mounted on the frame body through sliding blocks, pole pieces penetrate through a gap between the pair of stable clamping rollers, and adjusting bolts for adjusting the sliding positions of the sliding blocks are arranged on the frame body. Further, unreeling mechanism includes frame and a plurality of unreeling axle that can install rotatably in the frame, the frame is close to one side of roll-in mechanism is provided with and merges the roller, all unreel the sheet that the epaxial pay out of unreel all along same direction around merge the roller and get into in the roll-in mechanism. Further, a plurality of tensioning rollers which are in one-to-one fit with all the unreeling shafts are arranged on the frame. Further, a pair of traction pinch rollers matched with each other are arranged between the rolling mechanism and the rolling mechanism. Compared with the prior art, the utility model has the beneficial effects that: The int