CN218049705U

CN218049705U - Foil wrinkle removing roller after pole piece rolling

Info

Publication number: CN218049705U
Application number: CN202221369888.2U
Authority: CN
Inventors: 王小强
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-12-16
Anticipated expiration: 2032-06-01

Abstract

The utility model provides a pole piece rolls in back foil removes wrinkle roller, through will pass the roller and set up to middle supporting part, side supporting part and hypotenuse transition portion triplex, make it can carry out effectual support to the pole piece, reach the effect that the pole piece removed the wrinkle through the tension effect, and the setting of hypotenuse transition portion can cushion the pole piece, avoid causing the striking of thick liquids coating layer because of pole piece transport skew, prevent the pole piece from damaging; the whole coating of roller has ethylene-tetrafluoroethylene copolymer, need not artifical pasting teflon on the roller, can avoid leading to removing the big problem of wrinkle effect difference because of pasting the gimmick difference, has the advantage that the live time is long, has reduced the maintenance number of times.

Description

Foil wrinkle removing roller after pole piece rolling

Technical Field

The utility model relates to a battery pole piece production technical field especially relates to a pole piece rolls in back foil and removes wrinkle roller.

Background

The production process of the pole piece of the power battery mainly comprises the working procedures of coating, rolling, slitting and the like, after the pole piece is subjected to the coating working procedure, the pole piece can have an auxiliary material area and a foil area, the thickness of the auxiliary material area is 100-300 micrometers, and the thickness of the foil is only 4.5-16 micrometers, so that after the pole piece is rolled by a roller press, the auxiliary material area is relatively fluffy, when the pole piece is pressed to a specified thickness, the whole auxiliary material area of the pole piece can be greatly extended, the foil area is relatively thin, the pressure of a roller is basically not applied, and the foil is basically not extended. The auxiliary material area and the foil area have different extension rates, the foil area folding phenomenon is directly caused, the subsequent processing production quality is seriously influenced, the foil area folding can cause bad results of poor lug die cutting, lug welding fracture and the like, the consistency and the safety performance of the battery are finally influenced, and therefore the problem that pole piece folding is important for improving the safety of the battery and improving the production yield of the battery is solved.

At present, a method for solving wrinkles of a rolled pole piece foil mainly comprises the steps of sticking Teflon on a roller passing position where the rolled pole piece passes through, and supporting a foil area through the height difference of a roller surface, so that a foil position is supported by larger tension, the foil is effectively stretched, and the effects of flattening and wrinkle removal are achieved; the disadvantages of this method are: production technicians are required to enter the equipment to manually paste the Teflon, the pasting effect of the workers is poor, the pasting methods of different people are different, the consistency is poor, the wrinkle removing effect of the foil is large, the pasted Teflon is not durable, and the replacement frequency is high; and secondly, the pole pieces are slightly swung left and right due to deviation correction difference in pole piece transmission, and the pole pieces are easily damaged by the traditional roller passing.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a remove wrinkle effectual, durable's pole piece roll-in back foil removes wrinkle roller.

The technical scheme of the utility model is realized like this: the utility model provides a foil wrinkle-removing roller after pole piece rolling, which comprises an air expansion shaft, a fastening bolt and a roller, wherein the roller is sleeved on the air expansion shaft, and two ends of the roller are fixedly connected with the air expansion shaft through the fastening bolt;

the roller comprises a middle supporting part and side supporting parts, the connecting parts of the middle supporting part and the side supporting parts are in transitional connection through bevel edge transition parts, the diameter of each side supporting part is larger than that of the middle supporting part, and the whole roller is coated with a wear-resistant coating.

In addition to the above technical solution, preferably, the diameter of the intermediate support portion of the pass roll is 100 mm.

In addition to the above technical solutions, preferably, the diameter of the side supporting part of the roller is 100.05 mm to 100.1 mm.

On the basis of the technical scheme, preferably, the wear-resistant coating applied on the roller is ethylene-tetrafluoroethylene copolymer.

On the basis of the technical scheme, preferably, the coating thickness of the bevel edge transition wear-resistant coating of the roller is thicker than that of the middle supporting part and the side supporting part.

On the basis of the technical scheme, preferably, the wear-resistant coating of the middle supporting part and the side supporting part of the roller is coated to a thickness of 3 microns.

On the basis of the above technical scheme, preferably, the wear-resistant coating of the bevel edge transition part is coated to a thickness of 5 microns.

On the basis of the technical scheme, preferably, the side supporting part of the roller is made of aluminum alloy.

The utility model discloses a foil removes wrinkle roller after pole piece roll-in has following beneficial effect for prior art:

(1) The wear-resistant coating is coated on the roller and is made of the ethylene-tetrafluoroethylene copolymer, so that the roller has the advantages of good wear resistance and long service life, frequent Teflon pasting replacement is not required manually, and the problem of large difference of wrinkle removing effects of the foil due to poor Teflon pasting consistency caused by different manual methods can be solved; and the roller is provided with the bevel edge transition part, so that even if the pole piece deviates in the conveying process, the transition part can buffer, the foil cannot be damaged, and the yield can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of the foil wrinkle removing roller after rolling the pole piece of the utility model;

fig. 2 is a front view of the foil wrinkle removing roller after the pole piece is rolled;

fig. 3 is a structure diagram of the application product of the foil wrinkle-removing roller after the pole piece is rolled.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1-3, the foil wrinkle removing roller for rolled pole pieces of the present invention comprises an air expansion shaft 1, a fastening bolt 2 and a roller 3; the device is used for removing wrinkles of the pole piece, and the pole piece mainly comprises a foil 100, a ceramic coating layer 200 and a slurry coating layer 300.

The roller 3 is sleeved on the inflatable shaft 1, two ends of the roller 3 are fixedly connected with the inflatable shaft 1 through fastening bolts 2 respectively, and the inflatable shaft 1 is used for driving the roller 3 to rotate; the roller 3 comprises a middle supporting part 301 and side supporting parts 302, the connecting parts of the middle supporting part 301 and the side supporting parts 302 are in transitional connection through a bevel edge transitional part 303, the diameter of each side supporting part 302 is larger than that of the middle supporting part 301 so as to be used for guiding the pole piece conveying, and the whole roller 3 is coated with a wear-resistant coating; compared with the traditional pasting Teflon, the wear-resistant coating has the advantages of no need of manual operation and long service time, and can avoid the problem of large difference of wrinkle removing effect caused by difference of pasting methods; because cross and be provided with hypotenuse transition portion 303 on the roller 3, it makes this device carry and produces the skew when carrying out tension drawing to the pole piece, and hypotenuse transition portion 303 can cushion, prevents the pole piece striking, can avoid the pole piece to damage.

In the present embodiment, as a preferable mode, the diameter of the intermediate support portion 301 of the roller 3 is 100 mm.

In the present embodiment, as a preferable mode, the diameter of the side supporting portion 302 of the roller 3 is 100.05 mm to 100.1 mm.

In this embodiment, as a preferable mode, the wear-resistant coating applied on the roller 3 is an ethylene-tetrafluoroethylene copolymer, which has the advantages of good wear resistance and durability, and does not need frequent maintenance.

In this embodiment, as a preferable mode, the thickness of the wear-resistant coating of the bevel transition part 303 of the roller 3 is thicker than the thickness of the wear-resistant coating of the middle support part 301 and the side support part 302, and because the pole piece is conveyed by a certain offset, the bevel transition part 303 can buffer the pole piece, and the wear-resistant coating of the bevel transition part 303 is thicker to avoid too fast wear.

In this embodiment, the wear-resistant coating of the middle support part 301 and the side support part 302 of the roller 3 is preferably coated to a thickness of 3 μm.

In this embodiment, the wear-resistant coating of the bevel transition 303 is preferably applied to a thickness of 5 μm.

In this embodiment, the side supporting portion 302 of the roller 3 is preferably made of an aluminum alloy.

The method comprises the following specific implementation steps:

this device is at the during operation, pole piece after the roll-in supports through roller 3, there is certain tension effect to foil 100, it removes the wrinkle to reach the foil, because cross roller 3 and be provided with hypotenuse transition portion 303, consequently, hypotenuse transition portion 303 can play the cushioning effect when the pole piece produces the skew, avoid directly striking thick liquids coating layer 300, thereby avoid the pole piece to damage, it has ethylene-tetrafluoroethylene copolymer to cross 3 coatings of roller, need not the manual work and paste the teflon, it need not frequent maintenance to have, convenient to use's advantage, can avoid because of the manual work pastes the poor problem that leads to removing the wrinkle effect and have the difference of teflon uniformity.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A foil wrinkle removing roller after pole pieces are rolled comprises an air expansion shaft (1), fastening bolts (2) and a roller (3), wherein the roller (3) is sleeved on the air expansion shaft (1), and two ends of the roller (3) are fixedly connected with the air expansion shaft (1) through the fastening bolts (2);

the method is characterized in that: the roller (3) comprises a middle supporting part (301) and side supporting parts (302), the connecting part of the middle supporting part (301) and the side supporting parts (302) is in transitional connection through a bevel edge transition part (303), the diameter of each side supporting part (302) is larger than that of the middle supporting part (301), and the roller (3) is coated with a wear-resistant coating integrally.

2. The pole piece rolled foil wrinkle removing roller as claimed in claim 1, characterized in that: the diameter of the middle supporting part (301) of the roller (3) is 100 mm.

3. The pole piece rolled foil wrinkle removing roller as claimed in claim 2, characterized in that: the diameter of the side supporting part (302) of the roller (3) is 100.05 mm-100.1 mm.

4. The pole piece rolled foil wrinkle removing roller as claimed in claim 1, characterized in that: the coating thickness of the wear-resistant coating of the bevel edge transition part (303) of the roller (3) is thicker than that of the middle support part (301) and the side support part (302).

5. The pole piece rolled foil wrinkle removing roller as claimed in claim 4, characterized in that: the wear-resistant coating thickness of the middle supporting part (301) and the side supporting part (302) of the roller (3) is 3 microns.

6. The pole piece rolled foil wrinkle removing roller as claimed in claim 5, characterized in that: the wear resistant coating of the bevel transition (303) is applied to a thickness of 5 microns.

7. The pole piece rolled foil wrinkle removing roller as claimed in claim 1, characterized in that: the side supporting part (302) of the roller (3) is made of aluminum alloy.