CN212558741U

CN212558741U - Wrinkle removing roller and pole piece wrinkle removing roller assembly thereof

Info

Publication number: CN212558741U
Application number: CN202020695708.4U
Authority: CN
Inventors: 马毅; 孙新乐
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-02-19
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to a lithium cell process equipment makes the field, discloses a remove wrinkle roller and pole piece remove wrinkle roller subassembly thereof, wherein remove the wrinkle roller include the pivot and can dismantle first roller and the second roller of fixing in the pivot, first roller and second roller separate each other the segmentation set up in the pivot. The utility model discloses set up to the exhibition that sectional type, can make up and remove the wrinkle roller, pass through hollow structure of respective inside with one or more second roller and first roller, arrange the combination according to certain mode and fix in the pivot, make its cloth district that sets up position and pole piece and leave the blank district and correspond each other, effectively reduce the production of roll-in-process pole piece fold, improve pole piece yields, promote production efficiency, application scope is wider, safer.

Description

Wrinkle removing roller and pole piece wrinkle removing roller assembly thereof

Technical Field

The utility model relates to a lithium cell process equipment makes the field, specifically relates to remove wrinkle roller and pole piece removes wrinkle roller subassembly thereof.

Background

The lithium battery is used as the fastest-developing product in the new energy industry, is widely applied to the digital products and the automobile industry, and is the subject of research one by one when various problems occur in the production and processing processes of the lithium battery. Rolling is an important process in the production process of lithium batteries, and in popular terms, the process is to roll the coated pole piece according to a specific thickness, and the rolled pole piece is provided for the next process, and the main application range is a roll press with a continuous coating mode. Specifically, in the production process of the lithium ion battery, the pole piece structure is fluffy after coating, the pole piece needs to be rolled to obtain a pole piece with a tighter texture, the requirement on the compaction density of the pole piece is higher and higher along with the requirement on the high capacity of the lithium ion battery, and the extension degree of the pole piece is different in the rolling process due to the fact that the material area and the foil area with white space in the middle of the pole piece are pressed, so that the foil area is wrinkled. The wrinkles generated in the pole piece foil area can bring serious influence to the subsequent manufacturing of the lithium ion battery, and the wrinkles generated in the foil area can cause adverse consequences such as pole piece welding fracture and the like, so that the safety of the battery is seriously influenced, and therefore the problem of pole piece wrinkles is solved, the safety of the battery is improved, and the improvement of the production yield of the battery is particularly important.

The method for solving the problem of pole piece wrinkles in the rolling process is more and mainly comprises the following steps:

(1) stretching and extending the pole piece by one or more integral flattening (wrinkle removing) rollers or bending rollers to flatten the pole piece in the advancing process; the disadvantages of this approach are: the flattening roller and the bending roller only have an effect on the pole piece with one blank in the middle, have no obvious effect on a plurality of blank pole pieces, and have narrow application range and poor flexibility;

(2) the pole piece is integrally stretched by large tension before and after entering a main roller of a roller press; the disadvantages of this approach are: the large tension is easy to cause the pole piece to break, and the production efficiency and the yield are influenced;

(3) teflon is artificially adhered to the position of the roller passing through the advancing process of the pole piece, and flattening and wrinkle removal are carried out on the pole piece foil area through flattening of the height difference of the roller surface; the disadvantages of this method are: production personnel need to enter the equipment for operation, potential safety hazards exist, pasting methods are different for each person, and the flattening and wrinkle removing effects are different greatly.

In summary, based on the disadvantages and drawbacks of the prior art that the electrode sheet is flattened and wrinkles are removed in different ways such as integral flattening, tension stretching, and manual pasting of teflon, a technical scheme with wider applicability and higher safety is developed to prevent the electrode sheet from wrinkling in the foil area during the rolling process, which is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the pole piece that prior art exists and removing the wrinkle effect poor, battery production yield low problem, provide and remove wrinkle roller and pole piece and remove wrinkle roller subassembly, the utility model discloses set up to the sectional type, can make up the exhibition flat wrinkle roller that removes, with one or more second roller and first roller through hollow structure inside separately, arrange the combination according to certain mode and fix in the pivot, make its cloth district that sets up position and pole piece correspond each other with the area of leaving a blank, effectively reduce the production of roll-in-process pole piece fold, improve the pole piece yields, promote production efficiency, application scope is wider, safer.

In order to achieve the above object, an aspect of the present invention provides a wrinkle removing roller, including a rotating shaft and a first roller and a second roller detachably fixed on the rotating shaft, the first roller and the second roller are arranged on the rotating shaft at intervals and in a segmented manner.

Preferably, the rotating shaft is a rotary air expansion shaft, the rotary air expansion shaft comprises a shaft body and an inflatable expansion portion arranged on the outer surface of the shaft body, the expansion portion is inflated and expanded and is fixedly expanded with the first roller column and the second roller column, the expansion portion is deflated and contracted, and the first roller column and the second roller column are released and detached.

Preferably, the first roller is a first cylinder, a first through hole is formed in the first cylinder, and the rotary air expansion shaft penetrates through the first through hole, so that the first cylinder and the rotary air expansion shaft rotate synchronously.

Preferably, the second roller is a second cylinder, a second through hole is formed in the second cylinder, the rotary air expansion shaft penetrates through the second through hole, so that the second cylinder and the rotary air expansion shaft rotate synchronously, and the side edge of the shaft section of the second cylinder is arc-shaped.

Preferably, the second rollers comprise a plurality of series of rollers that can be used in alternate combination with the first rollers, and if the maximum distance between the two side edges of the shaft section is set to H and the length of the bottom edge of the shaft section is set to a, then: h ═ a +0.2mm × n, where n is any one positive integer from 1 to 10.

Preferably, the length a of the bottom side of the axial section of the second roller is the same as the diameter B of the bottom side of the first roller.

Preferably, the end faces of the first roller and the second roller are provided with surface oxidation treatment layers.

Preferably, the number of the first rollers is plural, and the number of the second rollers is one or more.

The utility model discloses the second aspect provides a pole piece removes wrinkle roller subassembly, including servo motor and through servo motor driven as above remove the wrinkle roller, first roller with the second roller is in it sets up the position respectively with the cloth district of the pole piece of treating processing and the position of leaving the white district corresponding to change epaxial interval segmentation.

Preferably, the relationship between the height L of the second roller and the width L1 of the whitespace is: l-1 + (2.5-5) mm.

Through the technical scheme, the utility model discloses set up to the flattening that sectional type, can make up and remove the wrinkle roller, with one or more second rollers and first roller through respective inside hollow structure, arrange the combination according to certain mode and fix in the pivot, make its cloth district that sets up position and pole piece and leave white district and correspond each other, effectively reduce the production of roll-in-process pole piece wrinkle, improve the pole piece yields, promote production efficiency, application scope is wider, safer.

Drawings

Fig. 1 is a schematic view of an overall structure of a wrinkle removing roller according to an embodiment of the present invention;

fig. 2 and 3 are a perspective view and an end face structure schematic view of the first roller in fig. 1, respectively;

FIGS. 4 to 6 are schematic perspective views, axial cross sections and end face structures of the second roller in FIG. 1, respectively;

FIG. 7 is a schematic view of the overall structure of a wrinkle removing roller assembly according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a pole piece structure to be wrinkle-removed.

Description of the reference numerals

100 remove wrinkle roller 110 spindle 120 first through-hole 130 second through-hole 131 first through-hole 200 servo motor 300 pole piece 310 cloth area 320 left white area L height L1 left white area width A second roller axis section bottom edge length B first roller axis section bottom surface diameter H second roller axis section side edge between both sides maximum distance

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" generally refer to the inner and outer relative to the profile of the components themselves; "distal and proximal" generally refer to distance relative to the contour of the components themselves.

As shown in fig. 1, the present invention provides a wrinkle removing roller 100, which comprises a rotating shaft 110 and a first roller 120 and a second roller 130 detachably fixed on the rotating shaft 110, wherein the first roller 120 and the second roller 130 are arranged on the rotating shaft 110 at intervals and in a segmented manner. That is, the utility model belongs to a sectional and combinable flattening wrinkle-removing roller, one or more second rollers and a first roller are arranged and combined and fixed on a rotating shaft according to a certain mode through respective internal hollow structures; the utility model discloses a to set up with the corresponding roller segmentation combination of different positions of pole piece, effectively reduce the production of roll-in-process pole piece fold, improve the pole piece yields, promote production efficiency, application scope is wider, safer.

In order to facilitate the detachment and assembly of the first roller 120 and the second roller 130, the rotating shaft 110 is a rotating air expansion shaft, and the first roller 120 and the second roller 130 are detachably fixed by the rotating air expansion shaft. The rotating shaft 110 is a rotary air expansion shaft, the rotary air expansion shaft includes a shaft body and an inflatable expansion portion (not shown in the figure) disposed on an outer surface of the shaft body, and the expansion portion is inflated and expanded and is fixed with the first roller 120 and the second roller 130; the tensioning part is deflated and contracted, and the first roller 120 and the second roller 130 are released and detached. That is, the rotary air-expansion shaft used in the embodiment shown in fig. 1 is based on the principle of air compression, when air is injected into the interior to expand, a portion of the shaft is expanded by the expansion part, and then the expansion part is tightly combined with the inner holes of the first roller 120 and the second roller 130, so as to be precisely fixed on the shaft; when the internal air is released, the expanded portion contracts and the shaft can be easily removed from the inner bores of the first and

second rollers

120 and 130. By adopting the structure, the first roller column 120 and the second roller column 130 are convenient to assemble and adjust in different combinations according to different structures of pole pieces to be processed in the using process to a great extent.

As shown in fig. 2 and fig. 3, specifically, the first roller 120 is a first cylinder, a first through hole 121 is formed in the first cylinder, and the rotary air-expanding shaft penetrates through the first through hole 121, so that the first cylinder and the rotary air-expanding shaft rotate synchronously.

As shown in fig. 4 to 6, the second roller 130 is a second cylinder, a second through hole 131 is formed in the second cylinder, and the rotary air expansion shaft passes through the second through hole 131, so that the second cylinder and the rotary air expansion shaft rotate synchronously; as shown in fig. 5, the side of the axial section of the second cylinder is arc-shaped.

More specifically, in order to be able to adapt to pole pieces of different sizes and for wrinkle removal, said second rollers 130 comprise a plurality of series of rollers that can be used in alternate combination with each other with said first rollers 120. As shown in fig. 5, if the maximum distance between the two side edges of the axial section of the second roller 130 is set to H and the length of the bottom edge of the axial section is set to a, then: h ═ a +0.2mm × n, where n is any one positive integer from 1 to 10. In practical applications, the second rollers 130 are the series of rollers formed by a plurality of sizes, and can be suitable for wrinkle removing processing of pole pieces with different sizes.

As shown in fig. 1, for convenience of processing and structural arrangement, the length of the bottom side of the axial section of the first roller 120 is the same as the diameter of the bottom surface of the second roller 130. In addition, the surfaces of the end surfaces of the first and

second rollers

120 and 130 adjacent to each other are each provided with a surface oxidation treatment layer. The number of the first rollers 120 is multiple, and the number of the second rollers 130 can be one or more, according to the requirement of the pole piece structure to be processed. In the embodiment shown in fig. 1, the first rollers 120 are provided in five number, three equal widths in the middle, two equal widths on both sides, and the first rollers 120 provided at different positions in the middle and both sides are slightly different in size; the second rollers 130 are arranged in four, have the same size, and are equidistantly spaced between the five first rollers 120.

As shown in fig. 7 in combination with fig. 8, a second aspect of the present invention provides a pole piece wrinkle removing roller assembly, which includes a servo motor 200 and a wrinkle removing roller 100 driven by the servo motor 200, as described above, the positions of the first roller 120 and the second roller 130 on the rotating shaft 110, which are set in different segments, correspond to the positions of the cloth area 310 and the blank area 320 of the pole piece 300 to be processed, respectively. For better wrinkle removing effect, the relationship between the height L of the second roller 130 and the width L1 of the whitening area 320 is: l ═ L1+ (2.5-5) mm, preferably: L-L1 +4 mm. The length a of the bottom side of the axial section of the second roller 130 is the same as the diameter B of the bottom side of the first roller 120, i.e.: a ═ B. Since the maximum distance between both side edges of the axial section of the second roller 130 is H, and the maximum distance H between both side edges of the axial section of the second roller 130 is set to 10 steps every 0.2mm, expressed as: h is a +0.2mm × n, (where n is any positive integer from 1 to 10, that is, n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10), so that the first roller 120 and the second roller 130 in different stages can be combined according to the position where wrinkles are most likely to occur, and the arrangement can be made according to different structures of different pole pieces. In actual installation, for the convenience of installation and reach good wrinkle effect, need guarantee certain installation requirement: the roughness Ra of the end surfaces of the cylinders of the second roller column 130 and the first roller column 120 is less than 0.2, the end surfaces of the second roller column 130 and the first roller column 120 are required to be subjected to surface oxidation treatment by a metal aluminum roller, the cylindricity of the first roller column 120 is 0.02mm, and the mounting run-out of the first roller column 120 and the second roller column 130 is less than or equal to 0.05 mm. During the installation process, the first roller 120 and the second roller 130 are arranged according to the characteristics of the pole piece 300, the first roller 120 is arranged below the cloth area 310, the second roller 130 is arranged below the blank area 320, and the first roller 120 and the second roller 130 are arranged on the rotating shaft 110 in the above manner. Because the rotating shaft 110 is a rotary air expansion shaft, and includes a shaft body and an inflatable expansion portion (not shown in the figure) disposed on an outer surface of the shaft body, the expansion portion is inflated and expanded and is fixed with the first roller 120 and the second roller 130; the tensioning part is deflated and contracted, and the first roller 120 and the second roller 130 are released and detached. The rotating shaft 110 is driven by the servo motor 200, and the first roller 120 and the second roller 130 concentrically rotate with the rotating air expansion shaft, so that the wrinkle removing treatment process of the pole piece is realized.

Particularly, the utility model provides a pole piece removes wrinkle roller subassembly's working process is like:

the servo motor 200 is started, the pole piece 300 passes through the rotating wrinkle removing roller 100, and the second roller column 130 in the wrinkle removing roller 100 is that: the second cylinder is used for flattening and removing wrinkles in a wrinkle area of the pole piece 300 through a specific radian, and the second rollers 130 and the first rollers 120 at different levels can be selected to be combined to flatten and remove wrinkles according to the sizes and degrees of different wrinkles, so that the wrinkle removing effect is achieved. After the wrinkle removing process is completed, the servo motor 200 is turned off.

It should be noted that, the utility model provides an above-mentioned pole piece removes wrinkle roller subassembly can set up in multiple large-scale equipment and production line system as a process program subassembly, for example: on a roller press or a pole piece production line, the starting and closing control of the servo motor is realized through the output signal of the control center, and the wrinkle removing treatment of the pole piece is realized.

To sum up, the utility model discloses through the roller segmentation combination setting that corresponds with the different positions of pole piece, solve to the exhibition of the continuous coating pole piece fold of different ranks, first roller and second roller pass through quantity, length, the high independent assortment, and application scope is wider, safer; effectively reducing the generation of pole piece wrinkles in the rolling process, and greatly improving the yield and the production efficiency of the pole piece.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The utility model discloses an in the technical conception scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, for example, can carry out different ground combinations to the quantity and the position of first roller and second roller according to the concrete structure of pole piece. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The wrinkle removing roller is characterized by comprising a rotating shaft (110) and a first roller (120) and a second roller (130) which are detachably fixed on the rotating shaft (110), wherein the first roller (120) and the second roller (130) are arranged on the rotating shaft (110) at intervals in a segmented mode.

2. The wrinkle removing roller as claimed in claim 1, wherein the rotating shaft (110) is a rotary inflatable shaft, the rotary inflatable shaft comprises a shaft body and an inflatable tensioning portion arranged on an outer surface of the shaft body, the tensioning portion is inflated and fixed with the first roller (120) and the second roller (130), the tensioning portion is deflated, and the first roller (120) and the second roller (130) are released and detached.

3. The wrinkle removing roller as claimed in claim 2, wherein the first roller (120) is a first cylinder, a first through hole (121) is opened in the first cylinder, and the rotary air-expanding shaft passes through the first through hole (121), so that the first cylinder and the rotary air-expanding shaft rotate synchronously.

4. The wrinkle removing roller as claimed in claim 3, characterized in that the second roller (130) is a second cylinder, the side of the axial cross-section of which is arc-shaped;

and a second through hole (131) is formed in the second cylinder, and the rotary air expansion shaft penetrates through the second through hole (131), so that the second cylinder and the rotary air expansion shaft rotate synchronously.

5. Wrinkle-removing roller as in claim 4, characterized in that the second rollers (130) comprise a number of series of rollers that can be used in alternative combination with the first rollers (120) to each other, the maximum distance (H) between the two side edges of the shaft section being set, the length (A) of the bottom edge of the shaft section being such that: h ═ a +0.2mm × n, where n is any one positive integer from 1 to 10.

6. Wrinkle-removing roller according to claim 4, characterized in that the length (A) of the bottom side of the shaft profile of the second roller (130) is the same as the diameter (B) of the bottom side of the first roller.

7. The wrinkle removing roller as claimed in claim 1, characterized in that the end surfaces of the first roller (120) and the second roller (130) are provided with a surface oxidation treatment layer.

8. The wrinkle-removing roller as claimed in claim 1, characterized in that the first rollers (120) are provided in plural and the second rollers (130) are provided in one or more number.

9. A pole-piece de-wrinkling roller assembly, characterized by comprising a servo motor (200) and the de-wrinkling roller (100) of any one of claims 1-8 driven by said servo motor (200), wherein the positions of the spaced segments of said first roller (120) and said second roller (130) on said rotating shaft (110) correspond to the positions of the material distribution area (310) and the blank area (320) of the pole piece (300) to be processed, respectively.

10. A pole piece de-creasing roller assembly, according to claim 9, characterised in that the relationship between the height (L) of the second roller stud (130) and the width (L1) of the whitening zone (320) is: l-1 + (2.5-5) mm.