CN217617210U

CN217617210U - Rolling device

Info

Publication number: CN217617210U
Application number: CN202221329954.3U
Authority: CN
Inventors: 江德顺; 肖礼军; 吴记彪
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-10-21
Anticipated expiration: 2032-05-19

Abstract

The utility model relates to a rolling device, its characterized in that, rolling device includes: the differential calendering mechanism comprises a first pressing roller, a second pressing roller and a first rotary driving device, the first pressing roller comprises a first working roller, the first working roller comprises a roller shaft and a first buffer piece, the roller shaft is provided with a first rolling portion, and the first buffer piece is sleeved on the first rolling portion; the second pressing roller is in driving connection with the first rotating driving device, the second pressing roller has a first rotating speed, and a first rolling gap is formed between the second pressing roller and the first working roller; the roll pressing mechanism comprises a third pressing roll, a fourth pressing roll and a fifth pressing roll, a second pressing gap is formed between the third pressing roll and the fourth pressing roll, the fifth pressing roll comprises a second working roll, the second working roll comprises a second pressing part, and a third pressing gap is formed between the second working roll and the fourth pressing roll. The rolling device improves the consistency of the elongation rate of each part of the pole piece, and is easy to roll, reliable and safe to use.

Description

Rolling device

Technical Field

The utility model relates to a battery pole piece production technical field especially relates to roll-in device.

Background

The lithium cell is used extensively, in order to improve the energy density of battery, will carry out the roll-in to the battery pole piece usually, and the pole piece of lithium cell is that positive negative pole thick liquids form at the coating of foil both sides, has certain ductility, for improving production efficiency, need produce two or more pole pieces with same foil simultaneously, in the coating process of preorder, in order to save active material's quantity, the regional active material that does not coat usually between the pole piece. During rolling, the compression roller presses the coating area of the pole piece to perform rolling extension, and the active substance in the coating area can extrude the residual area of the platinum sheet to cause foil extension, so that irregular winding of the pole piece can be easily caused, and the strip can be broken when the pole piece is serious, thereby wasting production materials.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a rolling device for solving the problem of different elongations of the coating area and the residual area when the pole piece is rolled.

A rolling apparatus, comprising:

the differential calendering mechanism comprises a first press roller, a second press roller and a first rotary driving device, wherein the first press roller comprises a first working roller, the first working roller comprises a roller shaft and a first buffer piece, the roller shaft is provided with a first rolling part, and the first buffer piece is sleeved on the first roller part; the second pressing roller is in driving connection with the first rotating driving device, the second pressing roller has a first rotating speed, and a first rolling gap is formed between the second pressing roller and the first working roller;

the rolling mechanism comprises a third pressing roller, a fourth pressing roller and a fifth pressing roller, a second pressing gap is formed between the third pressing roller and the fourth pressing roller, the fifth pressing roller comprises a second working roller, the second working roller comprises a second pressing part, and a third pressing gap is formed between the second working roller and the fourth pressing roller.

In one embodiment, the roller shaft is an integrated roller shaft, the first roller part includes a first protrusion, a second protrusion and a third protrusion, the first protrusion, the second protrusion and the third protrusion are uniformly arranged at intervals on the integrated roller shaft, the first buffer member includes a first portion, a second portion and a third portion, and the first portion, the second portion and the third portion are respectively sleeved on the first protrusion, the second protrusion and the third protrusion.

In one embodiment, the roller shaft is a split roller shaft, the split roller shaft includes a first sub roller, a second sub roller and a third sub roller, the first roller portion includes a first protrusion, a second protrusion and a third protrusion, the first protrusion, the second protrusion and the third protrusion are respectively disposed on the first sub roller, the second sub roller and the third sub roller, the first buffer includes a first portion, a second portion and a third portion, and the first portion, the second portion and the third portion are respectively sleeved on the first protrusion, the second protrusion and the third protrusion.

In one embodiment, the second working roll further comprises a working roll shaft and four second buffer members, the second rolling portion comprises a first non-coating region protrusion, a second non-coating region protrusion and a third non-coating region protrusion, the first non-coating region protrusion, the second non-coating region protrusion and the third non-coating region protrusion are uniformly arranged on the working roll shaft at intervals, and the four second buffer members are respectively sleeved on one side or two sides of the first non-coating region protrusion, the second non-coating region protrusion and the third non-coating region protrusion.

In one embodiment, the fifth pressing roller further comprises two supporting rollers and a supporting frame, the two supporting rollers are connected with the supporting frame, and the working roller shaft is arranged between the two supporting rollers and the fourth pressing roller and connected with the supporting frame.

In one embodiment, the first press roll further comprises a first driving device connected with the first working roll; and/or the presence of a gas in the gas,

the fifth press roll further comprises a second driving device, and the second driving device is connected with the second working roll.

In one embodiment, the rolling device further comprises a deviation rectifying mechanism, the deviation rectifying mechanism comprises a limiting member, and the deviation rectifying mechanism is arranged on one side close to the differential calendering mechanism, and/or the deviation rectifying mechanism is arranged on one side close to the rolling mechanism.

In one embodiment, the rolling device further comprises a tension adjusting mechanism, wherein the tension adjusting mechanism comprises a tension wheel, the tension adjusting mechanism is arranged on one side close to the differential rolling mechanism, and/or the tension adjusting mechanism is arranged on one side close to the rolling mechanism.

In one embodiment, the rolling device further comprises an unwinding mechanism, the unwinding mechanism comprises an unwinding roller and a second rotary driving motor, the second rotary driving motor is in driving connection with the unwinding roller, the unwinding roller has a second rotating speed, and the unwinding roller is arranged on one side close to the differential calendering mechanism.

In one embodiment, the rolling device further comprises a take-up roll, and the take-up roll is arranged on one side close to the rolling mechanism.

The rolling device is characterized in that a first rolling gap is formed between the second press roller and the first working roller, the pole pieces can be clamped and rolled, the first pressing portion is sleeved with the first buffer piece, the first pressing portion corresponds to the area of the pole pieces except for the coating area, during rolling, the first buffer piece is in contact with the thinning area and the ceramic layer area of the pole pieces, the thinning area and the ceramic layer area are rolled, the second press roller is in driving connection with the first rotary driving device and has a first rotating speed different from the advancing speed of the pole pieces, the thinning area and the ceramic layer area of the pole pieces can be further extended, a second rolling gap is formed between the third press roller and the fourth press roller, the coating area of the pole pieces can be rolled, a third rolling gap is formed between the second working roller and the fourth press roller, the blank area of the pole pieces can be extended, the consistency of the extension rate of each part of the pole pieces is improved, the quality and the reliability of the pole pieces are improved, and the pole pieces can be easily rolled, and can be used safely.

Drawings

FIG. 1 is a schematic view of an overall structure of a rolling device according to an embodiment;

FIG. 2 is a schematic diagram of a pole piece structure in an embodiment;

FIG. 3 is a schematic view of a differential calendering mechanism of the rolling device in one embodiment;

fig. 4 is a schematic cross-sectional view of a first work roll of the rolling device in one embodiment;

FIG. 5 is a schematic view of another differential calendering mechanism of the rolling device in one embodiment;

FIG. 6 is a sectional view showing a partial structure of a differential rolling mechanism of a rolling device in one embodiment;

FIG. 7 is a schematic view of a fifth roll structure of a rolling device according to an embodiment;

fig. 8 is a schematic sectional view of a second work roll of the rolling device in one embodiment.

Description of reference numerals:

1. a differential calendering mechanism; 2. a rolling mechanism; 3. a deviation rectifying mechanism; 4. a tension adjustment mechanism; 5. an unwinding mechanism; 6. a wind-up roll;

11. a first press roll; 12. a second press roll; 21. a third press roll; 22. a fourth press roll; 23. a fifth press roll;

s, pole pieces; s1, a blank area is reserved; s2, a coating area; s3, thinning the area; s4, forming a ceramic layer;

111. a first driving device; 112. a first work roll; 1121. an integrated roll shaft; 1122. a first buffer member; 113. a first sub-roller; 114. a second sub-roller; 115. a third sub-roller;

231. a second driving device; 232. a support roll; 233. a second work roll; 2331. a work roll shaft; 23311. a first non-cladding region protrusion; 23312. a second non-cladding region protrusion; 23313. a third non-cladding region embossment; 2332. a second buffer.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, fig. 1 shows the whole structure schematic diagram of the rolling device in an embodiment of the present invention, fig. 2 shows the structure schematic diagram of a pole piece S in an embodiment of the present invention, fig. 3 shows the differential calendering mechanism 1 schematic diagram of the rolling device in an embodiment of the present invention, fig. 4 shows the profile schematic diagram of the first work roll 112 of the rolling device in an embodiment of the present invention, an embodiment of the present invention provides a rolling device, including: the differential calendering mechanism 1, the differential calendering mechanism 1 includes the first press roll 11, the second press roll 12 and the first rotary driving device, the first press roll 11 includes the first work roll 112, the first work roll 112 includes the roll shaft and the first cushion 1122, the roll shaft has the first roll pressing part, the first cushion 1122 is set up in the first roll pressing part cover; the second press roll 12 is in driving connection with the first rotation driving device, the second press roll 12 has a first rotation speed, and a first roll gap is formed between the second press roll 12 and the first working roll 112; the rolling mechanism 2, the rolling mechanism 2 includes third compression roller 21, fourth compression roller 22 and fifth compression roller 23, form the second between third compression roller 21 and the fourth compression roller 22 and roll the clearance, the fifth compression roller 23 includes second work roller 233, second work roller 233 includes the second roll splenium, form the third between second work roller 233 and the fourth compression roller 22 and roll the clearance. In the rolling device, a first rolling gap is formed between the second press roll 12 and the first work roll 112, the pole piece S can be clamped and rolled, the first rolling portion is sleeved with the first buffer 1122, the first rolling portion corresponds to the area of the pole piece S except for the coating area S2, during rolling, the first buffer 1122 is in contact with the skiving area S3 and the ceramic layer area S4 of the pole piece S, the skiving area S3 and the ceramic layer area S4 are rolled, the second press roll 12 is in driving connection with the first rotary driving device, the second press roll 12 has a first rotating speed, the first rotating speed is different from the advancing speed of the pole piece S, the skiving area S3 and the ceramic layer area S4 of the pole piece S can be further extended, a second rolling gap is formed between the third press roll 21 and the fourth press roll 22, the coating area S2 of the pole piece S can be rolled, a third rolling gap is formed between the second work roll 233 and the fourth roll 22, the white area S1 of the pole piece S can be rolled, the coating area S and the coating area S2 of the pole piece S can be rolled, the rolling gap can be rolled, the reliability of the pole piece S and the rolling gap can be improved, and the rolling gap can be increased, and the reliability of the rolling area of the rolling region of the rolling area S and the rolling area of the rolling area S, and the rolling area S can be improved.

Optionally, the first and second bumpers are rubber sleeves.

Optionally, as shown in fig. 3, in one embodiment, the roller shaft is an integrated roller shaft 1121, the first roller portion includes a first protrusion, a second protrusion and a third protrusion, the first protrusion, the second protrusion and the third protrusion are uniformly disposed on the integrated roller shaft 1121 at intervals, the first cushion 1122 includes a first portion, a second portion and a third portion, and the first portion, the second portion and the third portion are respectively sleeved on the first protrusion, the second protrusion and the third protrusion. During rolling, the first protrusion, the second protrusion and the third protrusion correspond to regions of the pole piece S except for the coating region S2, and contact with the pole piece S through the first buffer 1122, so that rolling stress is uniform, the extension effect of the pole piece S is improved, and the integrated roller shaft 1121 is easy to install.

Optionally, referring to fig. 5 and fig. 6, fig. 5 is a schematic view of another differential calendering mechanism 1 of the rolling device in an embodiment, fig. 6 is a sectional view of a part of the structure of the differential calendering mechanism 1 of the rolling device in an embodiment, in one embodiment, the roll shaft is a split roll shaft, the split roll shaft includes a first sub-roll 113, a second sub-roll 114 and a third sub-roll 115, the first rolling portion includes a first protrusion, a second protrusion and a third protrusion, the first protrusion, the second protrusion and the third protrusion are respectively disposed on the first sub-roll 113, the second sub-roll 114 and the third sub-roll 115, the first cushion 1122 includes a first portion, a second portion and a third portion, the first portion, the second portion and the third portion are respectively sleeved on the first protrusion, the second protrusion and the third protrusion, when the first sub-roll 113, the second sub-roll 114 and the third sub-roll 115 correspond to regions of the rolling device S except for the coating region S2, the first cushion 1122 is in contact with the pole piece S, the split roll shaft is easy to produce, the first sub-roll 113, the first sub-roll 114 and the third sub-roll 115 and the adjustable moments can be flexibly applied to pole pieces S.

In order to further improve the consistency of the spreading rate of the pole piece S, referring to fig. 7 and 8, in one embodiment, the second work roll 233 further includes a work roll shaft 2331 and second cushion members 2332, the second work roll includes first non-coating region protrusions 23311, second non-coating region protrusions 23312 and third non-coating region protrusions 23313, the first non-coating region protrusions 23311, the second non-coating region protrusions 23312 and the third non-coating region protrusions 23313 are uniformly spaced on the work roll shaft 2331, the number of the second cushion members 2332 is four, and the four second cushion members 2332 are respectively sleeved on one side or two sides of the first non-coating region protrusions 23311, the second non-coating region protrusions 23312 and the third non-coating region protrusions 23313. During rolling, the first non-coating region protrusion 23311, the second non-coating region protrusion 23312 and the third non-coating region protrusion 23313 correspond to and contact with the blank area S1 of the pole piece S, so that the four second cushion members 2332 can contact with the thinning region S3 and the ceramic layer region S4, and the blank area S1, the thinning region S3 and the ceramic layer region S4 are simultaneously rolled and extended, thereby further improving the consistency of the extension rate of each part of the pole piece S and improving the quality of the pole piece S.

Optionally, in order to improve the stability of the work roll shaft 2331, as shown in fig. 7, in one embodiment, the fifth pressing roll 23 further includes two supporting rolls 232 and a supporting frame, the two supporting rolls 232 are connected with the supporting frame, and the work roll shaft 2331 is disposed between the two supporting rolls 232 and the fourth pressing roll 22 and connected with the supporting frame.

Optionally, as shown in fig. 3 and 5, in one embodiment, the first press roller 11 further includes a first driving device 111, and the first driving device 111 is connected to the first work roller 112 and can drive the first work roller 112 to move, so as to adjust the first roller nip.

Optionally, as shown in fig. 7, in one embodiment, the fifth pressing roller 23 further includes a second driving device 231, and the second driving device 231 is connected to the second working roller 233 and can drive the second working roller 233 to move, so as to adjust the second pressing gap.

As shown in fig. 1, in one embodiment, the rolling device further includes a deviation rectifying mechanism 3, the deviation rectifying mechanism 3 includes a limiting member, and the deviation rectifying mechanism 3 is disposed at a side close to the differential rolling mechanism 1. The limiting parts are arranged on two sides of the pole piece S, so that the advancing direction of the pole piece S is restrained, and the pole piece S is prevented from deviating.

Alternatively, in one of the embodiments, the deviation correcting mechanism 3 is disposed on a side close to the rolling mechanism 2.

In one embodiment, the rolling device further comprises a tension adjusting mechanism 4, the tension adjusting mechanism 4 comprises a tension wheel, and the tension adjusting mechanism 4 is arranged on one side close to the differential rolling mechanism 1. The tension of the pole piece S is adjusted by adjusting the position of the tension wheel, so that the pole piece S is prevented from being separated.

Alternatively, in one of the embodiments, the tension adjusting mechanism 4 is provided on the side close to the rolling mechanism 2.

In one embodiment, the rolling device further includes an unwinding mechanism 5, the unwinding mechanism 5 includes an unwinding roller and a second rotary driving motor, the second rotary driving motor is in driving connection with the unwinding roller, the unwinding roller has a second rotation speed, and the unwinding roller is disposed at a side close to the differential calendering mechanism 1. The second press roller 12 has a first rotation speed, which is different from the second rotation speed, so that the pole piece S can be further extended during rolling.

Optionally, in one of the embodiments, the rolling device further includes a wind-up roller 6, and the wind-up roller 6 is disposed at a side close to the rolling mechanism 2.

In the rolling device, a first rolling gap is formed between the second press roll 12 and the first work roll 112, the pole piece S can be clamped and rolled, the first rolling portion is sleeved with the first buffer 1122, the first rolling portion corresponds to the area of the pole piece S except for the coating area S2, during rolling, the first buffer 1122 is in contact with the skiving area S3 and the ceramic layer area S4 of the pole piece S, the skiving area S3 and the ceramic layer area S4 are rolled, the second press roll 12 is in driving connection with the first rotary driving device, the second press roll 12 has a first rotating speed, the first rotating speed is different from the advancing speed of the pole piece S, the skiving area S3 and the ceramic layer area S4 of the pole piece S can be further extended, a second rolling gap is formed between the third press roll 21 and the fourth press roll 22, the coating area S2 of the pole piece S can be rolled, a third rolling gap is formed between the second work roll 233 and the fourth roll 22, the white area S1 of the pole piece S can be rolled, the coating area S and the coating area S2 of the pole piece S can be rolled, the rolling gap can be rolled, the reliability of the pole piece S and the rolling gap can be improved, and the rolling gap can be increased, and the reliability of the rolling area of the rolling region of the rolling area S and the rolling area of the rolling area S, and the rolling area S can be improved.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A rolling device, characterized in that it comprises:

the differential calendering mechanism comprises a first press roller, a second press roller and a first rotary driving device, wherein the first press roller comprises a first working roller, the first working roller comprises a roller shaft and a first buffer piece, the roller shaft is provided with a first rolling part, and the first buffer piece is sleeved on the first roller part; the second press roller is in driving connection with the first rotary driving device, the second press roller has a first rotating speed, and a first rolling gap is formed between the second press roller and the first working roller;

2. The rolling device according to claim 1, wherein the roller is an integrated roller, the first rolling portion includes a first protrusion, a second protrusion and a third protrusion, the first protrusion, the second protrusion and the third protrusion are uniformly spaced from each other on the integrated roller, the first buffer includes a first portion, a second portion and a third portion, and the first portion, the second portion and the third portion are respectively sleeved on the first protrusion, the second protrusion and the third protrusion.

3. The roller pressing device according to claim 1, wherein the roller shaft is a split roller shaft, the split roller shaft includes a first split roller, a second split roller, and a third split roller, the first roller pressing portion includes a first protrusion, a second protrusion, and a third protrusion, the first protrusion, the second protrusion, and the third protrusion are respectively disposed on the first split roller, the second split roller, and the third split roller, the first buffer includes a first portion, a second portion, and a third portion, and the first portion, the second portion, and the third portion are respectively sleeved on the first protrusion, the second protrusion, and the third protrusion.

4. The rolling device according to claim 1, wherein the second work roll further includes a work roll shaft and four second buffer members, the second roll pressing portion includes a first non-coating region protrusion, a second non-coating region protrusion, and a third non-coating region protrusion, the first non-coating region protrusion, the second non-coating region protrusion, and the third non-coating region protrusion are disposed on the work roll shaft at uniform intervals, and the four second buffer members are respectively fitted to one side or both sides of the first non-coating region protrusion, the second non-coating region protrusion, and the third non-coating region protrusion.

5. The rolling device according to claim 4, wherein the fifth roller further comprises two supporting rollers and a supporting frame, the two supporting rollers are connected with the supporting frame, and the work roller shaft is arranged between the two supporting rollers and the fourth roller and connected with the supporting frame.

6. A roller device according to any one of claims 1 to 5, characterized in that the first roller further comprises a first driving device connected to the first work roller; and/or the presence of a gas in the atmosphere,

the fifth compression roller further comprises a second driving device, and the second driving device is connected with the second working roller.

7. The rolling device according to any one of claims 1 to 5, further comprising a deviation correcting mechanism, wherein the deviation correcting mechanism comprises a limiting member, and the deviation correcting mechanism is arranged at one side close to the differential rolling mechanism, and/or the deviation correcting mechanism is arranged at one side close to the rolling mechanism.

8. The rolling device according to any one of claims 1 to 5, further comprising a tension adjusting mechanism including a tension wheel, the tension adjusting mechanism being disposed on a side close to the differential rolling mechanism, and/or the tension adjusting mechanism being disposed on a side close to the rolling mechanism.

9. The rolling device according to any one of claims 1 to 5, further comprising an unwinding mechanism, wherein the unwinding mechanism comprises an unwinding roller and a second rotary driving motor, the second rotary driving motor is in driving connection with the unwinding roller, the unwinding roller has a second rotation speed, and the unwinding roller is disposed at a side close to the differential calendering mechanism.

10. The rolling device according to claim 9, further comprising a take-up roll disposed at a side adjacent to the rolling mechanism.