CN218948497U

CN218948497U - Rolling device

Info

Publication number: CN218948497U
Application number: CN202223609467.5U
Authority: CN
Inventors: 王祖云; 彭建林
Original assignee: Shenzhen Tianxu Machinery Technology Co ltd
Current assignee: Shenzhen Tianxu Machinery Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-02
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to the technical field of battery pole piece production equipment, and aims to provide a rolling device. The heating mechanism of the rolling device has smaller volume and does not abrade the pole piece. The rolling device includes: the device comprises a frame, a transmission assembly, two groups of heating mechanisms and a rolling assembly; the transmission assembly comprises a first transmission roller which is rotationally connected with the frame, and the two ends of the first transmission roller are provided with heat insulation parts; the two groups of heating mechanisms are arranged at two ends of the first driving roller and symmetrically arranged along the perpendicular bisector of the connecting line of the two end faces of the first driving roller, each heating mechanism comprises a heating plate for heating the pole piece blank area wound on the first driving roller, and a gap is reserved between the heating plate at the same end and the heat insulation part; the rolling assembly is arranged on the frame and located on one side of the first driving roller. The utility model solves the problems of large occupied space of the heating mechanism of the rolling device, easy abrasion of the pole piece and low production efficiency when preheating the blank area in the prior art.

Description

Rolling device

Technical Field

The utility model relates to the technical field of battery pole piece production equipment, in particular to a rolling device.

Background

The pole piece of the lithium battery is usually formed by coating active slurry on a foil and drying the active slurry. After the drying is finished, the pole piece needs to be rolled to strengthen the bonding strength between the active substance in the active slurry and the foil, and prevent the active substance from peeling off from the foil in the processes of electrolyte soaking and lithium battery use.

Because the active slurry on the pole piece is only coated in the middle coating area, a blank area without the active slurry is formed on the left side and the right side of the pole piece. When the pole piece is rolled on the rolling device, a thickness difference exists between the coating area and the blank area of the pole piece, so that the coating area is rolled, and therefore, the coating area is stretched first, the blank area is stressed in a delayed manner, and cannot be rolled with the coating area and stretched simultaneously. This results in a difference in extensibility between the blank and coated areas, which can form wrinkles, affecting the quality of the pole piece.

The existing rolling device heats the blank areas on two sides of the polar plate in advance, improves the ductility of the blank areas, and then rolls the blank areas. Because the extensibility of the blank area is improved, the blank area has higher extensibility after being rolled, has smaller difference with the extensibility of the coating area, and does not form wrinkles. However, the space occupied by the heating component for heating the blank area in the existing rolling device is large, and the volume of the rolling device can be increased. And when the heating mechanism heats, the heating head can be contacted with the pole piece and generate relative friction, so that the pole piece is easy to wear, the quality of the pole piece is affected, in addition, the process steps are increased in a mode of preheating the pole piece in a blank area, and the production efficiency of the lithium battery is reduced.

Disclosure of Invention

Therefore, the utility model aims to overcome the defects that the heating mechanism of the rolling device in the prior art occupies larger space, the pole piece is easy to wear and the production efficiency is low when the blank area is preheated, and the rolling device with smaller heating mechanism volume, smaller installation space, no pole piece wear and high production efficiency is provided.

In order to solve the above problems, the present utility model provides a rolling apparatus comprising:

a frame;

the transmission assembly comprises a first transmission roller, the first transmission roller is rotationally connected with the frame, and heat insulation parts are arranged at two ends of the first transmission roller;

the two groups of heating mechanisms are respectively arranged at two ends of the first driving roller, and are symmetrically arranged along the perpendicular bisectors of the connecting lines of the two end surfaces of the first driving roller, each heating mechanism comprises a heating plate used for heating the pole piece blank area wound on the first driving roller, and a gap for setting the pole piece blank area is arranged between the heating plate at the same end and the heat insulation part;

the rolling assembly is arranged on the frame and is positioned on one side of the first driving roller.

Optionally, the heating mechanism further comprises a heating component for providing heat to the heating plate, and the heating component is arranged on the frame and connected with the heating plate.

Optionally, the heating assembly includes connecting pipe and electric cabinet, the connecting pipe with the axial parallel arrangement of first driving roller, the one end of connecting pipe with the electric cabinet is connected, the other end with the hot plate is connected, the electric cabinet set up in the frame.

Optionally, the heating mechanism further comprises a fixing assembly for connecting the frame and the connecting pipe.

Optionally, the fixed subassembly includes first fixed plate and second fixed plate, first fixed plate with second fixed plate detachable connection, first fixed plate is close to first semicircle orifice has been seted up to the one end of second fixed plate, the second fixed plate is close to the one end of first fixed plate has been seted up the second semicircle orifice, the connecting pipe sets up first semicircle orifice with in the round hole that the second semicircle orifice surrounds and forms.

Optionally, the second fixing plate is in a convex shape.

Optionally, the heating plate is an arc plate, and the radian of the heating plate is matched with the radian of two ends of the first driving roller.

Optionally, the heat insulation part is made of hard rubber materials.

Optionally, the roll-in subassembly includes two compression rollers and mount, two the compression roller set up in on the mount, and two have the roll-in clearance between the compression roller.

Optionally, the transmission assembly further includes a second transmission roller and a third transmission roller, the second transmission roller and the third transmission roller are both disposed on the frame, the second transmission roller is located above the first transmission roller, and the third transmission roller is located above the second transmission roller.

The utility model has the following advantages:

1. the utility model provides a rolling device, wherein a transmission assembly comprises a first transmission roller rotatably connected with a frame, and heat insulation parts are arranged at two ends of the first transmission roller. The heating assembly comprises two groups of heating mechanisms which are symmetrically arranged along the perpendicular bisector of the connecting line of the two end faces of the first driving roller. The heating plate of the heating mechanism can heat the pole piece blank area wound on the first driving roller. And a gap for setting a pole piece blank area is arranged between the heating plate and the heat insulation part at the same end. The gap is arranged, so that the pole piece abrasion caused by contact friction between the pole piece blank area and the heating plate can be prevented, and the production efficiency is higher. And heating mechanism symmetry sets up in the both ends of first driving roller, simple structure, overall arrangement are compact, the installation space that occupies is less.

2. The utility model provides a rolling device, a heating mechanism further comprises a fixing component used for connecting a rack and a connecting pipe, the fixing component comprises a first fixing plate and a second fixing plate which are connected in a dismounting mode, two first semicircular holes are formed in one end, close to the second fixing plate, of the first fixing plate, two second semicircular holes are formed in one end, close to the first fixing plate, of the second fixing plate, the connecting pipe is clamped through a circular hole formed by encircling the first semicircular holes and the second semicircular holes, and the shape of the circular hole is similar to that of the outer wall of the connecting pipe, so that the connecting pipe can be stably fixed. The fixing component is simple in structure and good in fixing effect.

3. According to the rolling device provided by the utility model, the heat insulation part is made of the hard rubber, and the heating mechanism only needs to heat the pole piece blank area, so that the heat insulation part made of the hard rubber can prevent heat from being transferred from two ends of the first driving roller to the middle part of the first driving roller, and the pole piece coating area can be prevented from being heated. The hard rubber has good heat insulation performance, is easy to obtain and has low production and manufacturing cost.

4. According to the rolling device provided by the utility model, the heating plate is an arc plate, the radian of the heating plate is matched with the radian of the two ends of the first driving roller, so that the pole piece blank area wound on the first driving roller can be uniformly heated, and the ductility of each part of the pole piece blank area can be improved. After the rolling assembly rolls, the difference of the extensibility of the pole piece blank area and the coating area is smaller, and wrinkles are not formed. The heating plate is arranged to be arc-shaped plates matched with the radians at the two ends of the first driving roller, so that the pole piece blank area can be guaranteed to be heated uniformly, the pole piece cannot be wrinkled after being rolled, and the quality of a product is high.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a rolling apparatus of the present utility model;

FIG. 2 is a schematic diagram showing the connection between the first driving roller and the heating mechanism in the rolling device of the present utility model;

fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Reference numerals illustrate:

1. a frame;

2. the device comprises a transmission assembly 201, a first transmission roller, 2011, a heat insulation part 202, a second transmission roller, 203 and a third transmission roller;

3. heating mechanism 301, heating plate 302, heating component 3021, connecting pipe 3022, electric cabinet 303, fixing component 3031, first fixing plate 3032, second fixing plate;

401. compression roller, 402, mount.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in FIG. 1, the rolling device is a preferred embodiment of the rolling device of the utility model, and the rolling device can be used for rolling the pole piece, and can heat the pole piece blank region before rolling the pole piece, so that the ductility of the pole piece blank region is improved, and the pole piece cannot be wrinkled between the pole piece blank region and the coating region after rolling. Moreover, the heating mechanism of the rolling device has smaller volume, smaller installation space, no abrasion of the pole piece and high production efficiency.

The rolling device includes: the device comprises a frame 1, a transmission assembly 2, two groups of heating mechanisms 3 and a rolling assembly. The frame 1 is arranged on the ground and is used for installing a transmission assembly 2 and two groups of heating mechanisms 3. The transmission assembly 2 is wound with a pole piece, and the pole piece can be conveyed to the rolling assembly for rolling.

Further, the transmission assembly 2 includes a first transmission roller 201, the first transmission roller 201 is rotatably connected with the frame 1, and two ends of the first transmission roller 201 are provided with heat insulation portions 2011. The first driving roller 201 is wound with a pole piece, and pole piece blank areas on two sides of the pole piece are positioned at the heat insulation part 2011, and a pole piece coating area is positioned between the heat insulation parts 2011 on two ends of the first driving roller 201. Specifically, the heat insulation part 2011 is made of hard rubber material, so that heat transfer can be isolated, and heat is prevented from being transferred from the heat insulation parts 2011 at two ends of the first driving roller 201 to the middle part when the heating mechanism 3 generates heat. Because the heating mechanism 3 is used for heating the pole piece blank area, the pole piece coating area is not required to be heated, and the pole piece coating area can be prevented from being heated by arranging the heat insulation part 2011.

The transmission assembly 2 further comprises a second transmission roller 202 and a third transmission roller 203, and the second transmission roller 202 and the third transmission roller 203 are arranged on the frame 1 and are in rotary connection with the frame 1. The second driving roller 202 is located obliquely above the first driving roller 201, and the third driving roller 203 is located obliquely above the second driving roller 202. The pole piece is sequentially wound on a third driving roller 203, a first driving roller 201 and a second driving roller 202, and is conveyed to a rolling assembly for rolling under the action of the third driving roller 203, the first driving roller 201 and the second driving roller 202.

The two groups of heating mechanisms 3 are respectively arranged at two ends of the first driving roller 201, and the two groups of heating mechanisms 3 are symmetrically arranged along the perpendicular bisector of the connecting line of the two end surfaces of the first driving roller 201. The heating mechanism 3 includes a heating plate 301 for heating the pole piece blank region wound around the first driving roller 201, and a gap for setting the pole piece blank region is provided between the heating plate 301 at the same end and the heat insulating portion 2011. By providing a gap, the heating plate 301 can be prevented from rubbing against the pole piece, and the pole piece can be prevented from being worn. Specifically, in this embodiment, the heating plate 301 is an arc plate, and the radian of the heating plate 301 is matched with the radian of two ends of the first driving roller 201, so that the pole piece blank area is heated uniformly, and the phenomenon that the local part of the pole piece blank area cannot be heated is avoided.

As shown in fig. 2, the heating mechanism 3 further includes a heating assembly 302 for supplying heat to the heating plate 301, and the heating assembly 302 is provided on the frame 1 and connected to the heating plate 301. Further, the heating assembly 302 includes a connection pipe 3021 and an electric cabinet 3022, the connection pipe 3021 is disposed parallel to the axial direction of the first driving roller 201, one end of the connection pipe 3021 is connected to the electric cabinet 3022, and the other end is connected to the heating plate 301. An electric cabinet 3022 is provided on the frame 1 to supply power to the heating plate 301. Specifically, in this embodiment, two connection pipes 3021 are provided in the present embodiment, the two connection pipes 3021 are arranged in parallel, one end of each connection pipe 3021 is connected to the electric cabinet 3022, the other end of each connection pipe 3021 is connected to the heating plate 301, the connection pipes 3021 are hollow pipes, wires are led into the interiors of the connection pipes, one ends of the wires are connected to the electric cabinet 3022, and the other ends of the wires are connected to the heating plate 301. The heating plate 301 is heated by supplying heat to the heating plate 301 through the electric cabinet 3022 and the wire inside the connection pipe 3021 to heat the pole piece blank area wound on the first driving roller 201, and the wire and the heating plate 301 are fixed through the connection pipe 3021.

As shown in fig. 3, the heating mechanism 3 further includes a fixing assembly 303 for connecting the housing 1 and the connection pipe 3021, the fixing assembly 303 including a first fixing plate 3031 and a second fixing plate 3032, and the first fixing plate 3031 and the second fixing plate 3032 being detachably connected. The first fixed plate 3031 has a rectangular shape, the second fixed plate 3032 has a convex shape, the first fixed plate 3031 and the second fixed plate 3032 can be connected by bolts, and the second fixed plate 3032 can be fixed to the frame 1 by bolts through protruding portions on both left and right sides.

The first semicircle hole has been seted up to the one end that first fixed plate 3031 is close to second fixed plate 3032, and the second semicircle hole has been seted up to the one end that second fixed plate 3032 is close to first fixed plate 3031, and connecting pipe 3021 sets up in the round hole that first semicircle hole and second semicircle hole encircled. Since the number of the connecting pipes 3021 is two in this embodiment, the number of the first semicircular holes and the second semicircular holes is two, and the diameters of the first semicircular holes and the second semicircular holes are equal to the outer diameter of the connecting pipe 3021.

The second fixing plate 3032 is fixedly disposed on the frame 1, and then the connection pipe 3021 is placed in the second semicircular hole, and then the first fixing plate 3031 is connected with the second fixing plate 3032, and the connection pipe 3021 is clamped by the first semicircular hole and the second semicircular hole, so that the connection pipe 3021 is prevented from shaking.

The rolling assembly is arranged on the frame 1 and on one side of the first driving roller 201. The rolling assembly comprises two pressing rollers 401 and a fixing frame 402, wherein the two pressing rollers 401 are arranged on the fixing frame 402, the two pressing rollers 401 are arranged up and down, and a rolling gap is reserved between the two pressing rollers 401. The pole piece is conveyed to the rolling assembly through the transmission assembly 2, and the pole piece can be rolled by the two pressing rollers 401 when passing through the rolling gap.

The following describes the operation of the rolling device as follows:

first, the pole piece is wound around the third driving roller 203, the first driving roller 201, and the second driving roller 202 in this order. While supplying heat to the heating plate 301 through the electric cabinet 3022 and the connection pipe 3021. The heating plate 301 heats the pole piece blank region located at the heat insulating portion 2011 of the first driving roller 201 to improve the ductility of the pole piece blank region. The pole piece is then transported to the roll assembly under the action of the drive assembly 2 and rolled under the action of the pressure roller 401. Because the ductility of the pole piece blank area is improved, the ductility of the pole piece blank area after rolling is similar to that of the pole piece coating area, and no fold occurs.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A roll-in apparatus, comprising:

a frame (1);

the transmission assembly (2) comprises a first transmission roller (201), the first transmission roller (201) is rotationally connected with the frame (1), and heat insulation parts (2011) are arranged at two ends of the first transmission roller (201);

the two groups of heating mechanisms (3) are respectively arranged at two ends of the first driving roller (201), the two groups of heating mechanisms (3) are symmetrically arranged along the perpendicular bisectors of the connecting lines of the two end faces of the first driving roller (201), the heating mechanisms (3) comprise heating plates (301) used for heating the pole piece blank area wound on the first driving roller (201), and gaps for setting the pole piece blank area are arranged between the heating plates (301) at the same end and the heat insulation part (2011);

the rolling assembly is arranged on the frame (1) and is positioned on one side of the first driving roller (201).

2. The rolling device according to claim 1, characterized in that the heating means (3) further comprise a heating assembly (302) for providing heat to the heating plate (301), which heating assembly (302) is arranged on the frame (1) and connected to the heating plate (301).

3. The rolling device according to claim 2, characterized in that the heating assembly (302) comprises a connecting pipe (3021) and an electric cabinet (3022), the connecting pipe (3021) is arranged in parallel with the axial direction of the first driving roller (201), one end of the connecting pipe (3021) is connected with the electric cabinet (3022), the other end is connected with the heating plate (301), and the electric cabinet (3022) is arranged on the frame (1).

4. A rolling device according to claim 3, characterized in that the heating means (3) further comprise a fixing assembly (303) for connecting the frame (1) and the connecting tube (3021).

5. The rolling device according to claim 4, wherein the fixing assembly (303) comprises a first fixing plate (3031) and a second fixing plate (3032), the first fixing plate (3031) is detachably connected with the second fixing plate (3032), a first semicircular hole is formed in one end, close to the second fixing plate (3032), of the first fixing plate (3031), a second semicircular hole is formed in one end, close to the first fixing plate (3031), of the second fixing plate (3032), and the connecting pipe (3021) is arranged in a circular hole formed by surrounding the first semicircular hole and the second semicircular hole.

6. The rolling device according to claim 5, characterized in that the second fixed plate (3032) is in the shape of a letter-cut.

7. The rolling device according to claim 1, characterized in that the heating plate (301) is an arc plate, the radian of the heating plate (301) being matched with the radian of both ends of the first driving roller (201).

8. The rolling device according to claim 1, characterized in that the heat insulation part (2011) is made of a hard rubber material.

9. The rolling device according to claim 1, characterized in that the rolling assembly comprises two press rolls (401) and a fixed frame (402), two press rolls (401) being arranged on the fixed frame (402) with a rolling gap between the two press rolls (401).

10. The rolling device according to any one of claims 1-9, characterized in that the drive assembly (2) further comprises a second drive roller (202) and a third drive roller (203), both the second drive roller (202) and the third drive roller (203) being arranged on the frame (1), the second drive roller (202) being located obliquely above the first drive roller (201), the third drive roller (203) being located obliquely above the second drive roller (202).