A battery cell winding device with tail roll press wheels collinear with the battery cell

Abstract

The application discloses a winding device for battery cell, which makes the tail winding pressure roller and the battery cell collinear. The winding device comprises a tail winding left side rotating shaft assembly, a tail winding right side rotating shaft assembly, a pressure roller assembly, a pressure roller assembly fixing frame and a pressure roller assembly driving mechanism. The pressure roller assembly comprises a pressure roller main body, a pressure roller shaft, an air bag and a polyurethane pressure roller. The pressure roller main body is rotationally connected with the pressure roller shaft. The air bag is arranged between the polyurethane pressure roller and the pressure roller main body. The angle of the polyurethane pressure roller is automatically adjusted by inflating the air bag, so that the outer circular surface of the polyurethane pressure roller is collinear with the upper surface of the battery cell, thereby improving the winding quality of the battery cell. The winding device solves the problem of adjusting the angle of the pressure roller when the battery cell is wound, improves the winding quality of the battery cell, and saves a large amount of assembly and subsequent maintenance time and cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy battery production equipment, in particular to a winding device for winding a battery cell with a tail roll and the battery cell in a straight line. BACKGROUND

[0002] The tail roll structure in the prior art mainly uses an aluminum part as the main body of the pressure roller, and a layer of polyurethane is wrapped on the outer circle. The pressure roller moves synchronously with the rotating battery cell to complete the wrapping of the battery cell. Due to the machining and assembly errors between the parts of the mechanism, the angle of the pressure roller needs to be adjusted before work to ensure that the contact between the work chamber pressure roller and the battery cell is a straight line, so that the winding of the battery cell is uniform and straight, and the wrapping is firm.

[0003] The existing technology can basically achieve the winding of the battery cell separator of the pressure roller, but it is difficult to adjust the contact between the pressure roller and the battery cell to be a straight line during work. The existing pressure roller is difficult to ensure that the contact with the battery cell is a straight line during rotation. If the contact cannot be maintained, there will be gaps in the winding process of the battery cell, which will affect the complete pressing of the battery cell separator and thus affect the quality of the winding of the battery cell and the performance of the battery cell. SUMMARY

[0004] To overcome the defects of the prior art, the purpose of the present application is to provide a winding device for winding a battery cell with a tail roll and the battery cell in a straight line, to improve the contact between the pressure roller and the battery cell during winding of the tail roll, and to improve the quality of the winding of the battery cell.

[0005] To this end, the present application provides a winding device for winding a battery cell with a tail roll and the battery cell in a straight line, comprising a tail roll left side rotating shaft assembly, a tail roll right side rotating shaft assembly, a pressure roller assembly, a pressure roller assembly fixing frame, and a pressure roller assembly driving mechanism. The tail roll left side rotating shaft assembly and the tail roll right side rotating shaft assembly are used to drive the battery cell to rotate, and the pressure roller assembly driving mechanism is used to drive the pressure roller assembly fixing frame to move, so that the pressure roller assembly moves synchronously with the battery cell.

[0006] The pressure roller assembly comprises a pressure roller main body, a pressure roller shaft, an air bag, and a polyurethane pressure roller. The pressure roller main body is rotatably connected to the pressure roller shaft. The air bag is arranged between the polyurethane pressure roller and the pressure roller main body. The angle of the polyurethane pressure roller is automatically adjusted by inflating the air bag, so that the outer circular surface of the polyurethane pressure roller is in line with the upper surface of the battery cell, thereby improving the quality of the winding of the battery cell.

[0007] Further, the outer circular surface of the polyurethane pressure roller has a plurality of annular grooves, which subdivide the surface of the polyurethane pressure roller into a plurality of small annular surfaces.

[0008] Further, the compression wheel shaft is a hollow structure, and the compression wheel shaft is provided with an air bag feeding joint at both ends, and a through hole is formed in the middle of the compression wheel shaft, and the air bag can be inflated through the through hole.

[0009] Further, a sealing plate is further arranged between the polyurethane compression wheel and the compression wheel shaft.

[0010] Further, a bearing seat is arranged on the compression wheel shaft, and the compression wheel body is rotationally connected with the compression wheel shaft through the bearing seat.

[0011] Further, the compression wheel assembly driving mechanism has a vertically arranged compression wheel extension cylinder, the cylinder rod of the compression wheel extension cylinder is connected with the compression wheel assembly fixing frame, and the compression wheel assembly is mounted on the compression wheel assembly fixing frame.

[0012] Further, the compression wheel assembly driving mechanism further comprises a horizontal support and a guide rod, the guide rod is arranged on the upper end of the compression wheel assembly fixing frame, the guide rod is slidingly connected with the horizontal support, and the compression wheel extension cylinder is mounted on the horizontal support and used for driving the compression wheel assembly fixing frame to move up and down.

[0013] Further, the compression wheel assembly driving mechanism further comprises a transverse driving cylinder, the transverse driving cylinder is mounted on a rack, the horizontal support is slidingly connected with the rack through a guide rail, and the horizontal support is driven by the transverse driving cylinder, so that the compression wheel assembly can move transversely.

[0014] Further, the compression wheel assembly driving mechanism is a servo synchronous belt or a screw rod module servo.

[0015] The battery cell winding device provided by the application makes the tail roll compression wheel and the battery cell collinear, solves the problem of adjusting the angle of the compression wheel when the battery cell is wound, improves the quality of the battery cell winding, and saves a large amount of assembly and subsequent maintenance time and cost.

[0016] The device of the application improves the structure of the compression wheel, subdivides the surface of the compression wheel into small faces, reduces the hardness of the surface, and independently fills the air bag between the compression wheel and the compression wheel shaft to form a sealed cavity; the compression wheel is also driven by the cylinder, but the air bag in the cavity is inflated during work. It can ensure that each independent face on the compression wheel and the battery cell are in uniform contact, that is, the compression wheel and the battery cell maintain a straight line at all times during contact, and that the contact between the outermost face of the compression wheel and the battery cell is more sufficient after the outermost face of the compression wheel is changed into a small face, so that the compression is more compact.

[0017] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments thereof, and its description, and do not constitute an improper limitation of the present application. In the drawings:

[0019] Figure 1 Structure schematic diagram of the battery cell winding device of the present application with the tail roll pressure roller collinear with the battery cell;

[0020] Figure 2 Structure schematic diagram of the battery cell winding device of the present application with the tail roll pressure roller collinear with the battery cell;

[0021] Figure 3 Structure schematic diagram of the battery cell winding device of the present application with the tail roll pressure roller collinear with the battery cell;

[0022] Figure 4 Structure schematic diagram of the battery cell winding device of the present application with the tail roll pressure roller collinear with the battery cell;

[0023] Explanation of reference signs

[0024] 1, tail roll left side rotating shaft assembly; 2, tail roll right side rotating shaft assembly; 3, pressure roller assembly; 4, battery cell; 5, pressure roller assembly fixing frame; 6, pressure roller assembly driving mechanism; 61, pressure roller extension air cylinder; 62, transverse driving air cylinder; 63, horizontal support; 64, guide rod; 7, air bag gas supply joint; 8, sealing plate; 9, bearing seat; 10, pressure roller shaft; 11, air bag; 12, polyurethane pressure roller; 13, pressure roller main body. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] As shown in the drawings, Figures 1-4 The battery cell winding device of the present application with the tail roll pressure roller collinear with the battery cell comprises: a tail roll left side rotating shaft assembly 1, a tail roll right side rotating shaft assembly 2, a pressure roller assembly 3, a pressure roller assembly fixing frame 5, and a pressure roller assembly driving mechanism 6; the tail roll left side rotating shaft assembly 1 and the tail roll right side rotating shaft assembly 2 are used to clamp and rotate the battery cell 4, the pressure roller assembly 3 is installed on the pressure roller assembly fixing frame 5, and the pressure roller assembly 3 is controlled to move synchronously with the battery cell by the pressure roller assembly driving mechanism 6, so as to achieve the purpose that the contact between the battery cell and the pressure roller is always a straight line, thereby ensuring the quality of the battery cell winding.

[0027] Specifically, as shown in the drawings, Figure 3As shown, the compression wheel assembly 3 includes a compression wheel body 13, a sealing plate 8, a bearing seat 9, a compression wheel shaft 10, an air bag 11, and a polyurethane compression wheel 12, the compression wheel body 13 is rotationally connected with the compression wheel shaft 10 through the bearing seat 9, and the compression wheel shaft 10 is fixedly connected with the compression wheel assembly fixing frame 5 at both ends; the air bag 11 is arranged between the polyurethane compression wheel 12 and the compression wheel body 13.

[0028] The compression wheel shaft 10 is a hollow structure, and is provided with an air bag feeding joint 7 at both ends, and a through hole is formed in the middle of the compression wheel shaft 10; and the polyurethane compression wheel 12 and the compression wheel shaft 10 are further provided with the sealing plate 8 to form a closed cavity, and the air bag can be inflated through the through hole; when a certain air pressure is given to the air bag feeding joint 7, the air bag 11 is forced to extrude the polyurethane compression wheel 12, the angle of the polyurethane compression wheel 12 is automatically adjusted, the outer circular surface of the polyurethane compression wheel 12 is always a straight line with the upper surface of the battery cell 4 during work, and the quality of the battery cell winding is ensured.

[0029] As shown in the figure, Figure 4 The outer circular surface is further improved in structure, the polyurethane compression wheel 12 has a plurality of annular grooves on the outer circular surface, the surface is subdivided into a plurality of small annular surfaces, and the hardness of the surface is reduced, and the annular grooves are equivalent to cutting the compression wheel into a plurality of small wheels, so that the contact area is small and the required pressure is also small, and the effect of the wound battery cell is much better than that of the whole large wheel.

[0030] As shown in the figure, Figure 2 The compression wheel assembly driving mechanism 6 includes a vertically arranged compression wheel extension cylinder 61, the cylinder rod of the compression wheel extension cylinder 61 is connected with the compression wheel assembly fixing frame 5, is used for driving the compression wheel assembly fixing frame 5, the compression wheel assembly 3 and the battery cell 4 to move synchronously, and completes the battery cell winding process.

[0031] As shown in the figure, Figure 2 The compression wheel assembly driving mechanism 6 further includes a transverse driving cylinder 62, a horizontal support 63 and a guide rod 64; the guide rod 64 is arranged on the upper end of the compression wheel assembly fixing frame 5, the guide rod 64 is slidingly connected with the horizontal support 63, and the compression wheel extension cylinder 61 is installed on the horizontal support 63 and is used for driving the compression wheel assembly fixing frame 5 to move up and down.

[0032] The transverse driving cylinder 62 is installed on the rack, the horizontal support 63 is slidingly connected with the rack through a guide rail and is driven by the transverse driving cylinder 62, so that the compression wheel assembly 3 can move transversely, thereby not only can the middle part of the battery cell be pressed, but also the two ends of the battery cell can be pressed, and the quality of the battery cell winding is ensured.

[0033] It should be noted that, in order to enable the compression wheel assembly 3 to move synchronously with the battery cell 4, other structures can also be adopted, such as the compression wheel assembly driving mechanism 6 driven by the cylinder can be replaced by a servo synchronous belt or a screw module servo, which still belongs to the protection range of the present application.

[0034] The working principle and working process of the battery cell winding device of the application are described below in combination with the drawings.

[0035] The battery cell 4 is synchronously rotated by the tail roll left side rotating shaft assembly 1 and the tail roll right side rotating shaft assembly 2 on the left and right sides of the tail roll. At the same time of the rotation of the battery cell 4, the pressure roller assembly 3 is moved up and down by the pressure roller assembly driving mechanism 6 to move synchronously with the battery cell 4. In this process, the air bag 11 in the polyurethane pressure roller cavity is deformed by a certain air pressure of the polyurethane pressure roller 12, so as to make the contact between the battery cell and the pressure roller always be a straight line, so as to ensure the winding quality of the battery cell.

[0036] In the device of the application, the pressure roller is also driven by the air cylinder, but the air bag in the cavity is inflated during the work. The uniform contact between each independent surface of the pressure roller and the battery cell can be ensured, that is, the straight line is kept at the moment of the contact between the pressure roller and the battery cell during the work, and the contact between the battery cell and the pressure roller is more sufficient after the outermost surface of the pressure roller is changed into a small surface, so as to make the pressure more compact.

[0037] Working process: the tail roll left side rotating shaft assembly 1 and the tail roll right side rotating shaft assembly 2 synchronously rotate to drive the rotation of the battery cell 4; the pressure roller assembly 3 moves synchronously with the battery cell 4, when the battery cell 4 is parallel to the horizontal plane, the pressure roller assembly 3 is moved up and down by the pressure roller extension air cylinder 61 to realize the up and down movement of the pressure roller assembly 3, when the contact between the battery cell 4 and the pressure roller assembly 3 is not a straight line, the air bag gives a certain air pressure to the air joint 7, so as to make the air bag 11 press the polyurethane pressure roller 12, so as to make the battery cell 4 and the pressure roller assembly 3 always be a straight line during the work.

[0038] When the battery cell 4 is at a certain angle with the horizontal plane, the pressure roller assembly 3 also adjusts the contact straight line between the pressure roller assembly 3 and the battery cell 4 by the pressure roller extension air cylinder 61, so as to make the two parallel to each other. In this way, the consistency and uniformity of the battery cell winding are ensured, the battery cell is completely attached to the diaphragm, and the quality of the battery cell is improved.

[0039] The above only describes the preferred embodiments of the application and is not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A battery cell winding device that makes a tail winding roller collinear with a battery cell, characterized by, The tail roll left side rotating shaft assembly (1), the tail roll right side rotating shaft assembly (2), the compression wheel assembly (3), the compression wheel assembly fixing frame (5), and the compression wheel assembly driving mechanism (6) are included. The tail roll left side rotating shaft assembly (1) and the tail roll right side rotating shaft assembly (2) are used to drive the rotation of the battery cell (4), and the compression wheel assembly driving mechanism (6) is used to drive the movement of the compression wheel assembly fixing frame (5), so that the compression wheel assembly (3) moves synchronously with the battery cell (4). The compression wheel assembly (3) includes a compression wheel body (13), a compression wheel shaft (10), an air bag (11), and a polyurethane compression wheel (12), the compression wheel body (13) is rotatably connected with the compression wheel shaft (10), the air bag (11) is arranged between the polyurethane compression wheel (12) and the compression wheel body (13), and the angle of the polyurethane compression wheel (12) is automatically adjusted by inflating the air bag (11), so that the outer circular surface of the polyurethane compression wheel (12) is collinear with the upper surface of the battery cell (4), thereby improving the winding quality of the battery cell (4).

2. The jelly roll winding apparatus of claim 1, wherein, The outer circular surface of the polyurethane compression wheel (12) has a plurality of annular grooves, which subdivide the surface of the polyurethane compression wheel (12) into a plurality of small annular surfaces.

3. The jelly roll winding apparatus of claim 1, wherein, The compression wheel shaft (10) is a hollow structure, the compression wheel shaft (10) is provided with an air bag inflation connector (7) at both ends, and a through hole is formed in the middle of the compression wheel shaft (10), through which the air bag (11) can be inflated.

4. The jelly roll winding apparatus of claim 3, wherein the tail roll presser is arranged to be in line with the electrode assembly. A sealing plate (8) is further arranged between the polyurethane compression wheel (12) and the compression wheel shaft (10).

5. The jelly roll winding apparatus of claim 1, wherein, A bearing seat (9) is arranged on the compression wheel shaft (10), and the compression wheel body (13) is rotatably connected with the compression wheel shaft (10) through the bearing seat (9).

6. The jelly roll winding apparatus of claim 1, wherein, The compression wheel assembly driving mechanism (6) has a vertically arranged compression wheel extension air cylinder (61), the cylinder rod of the compression wheel extension air cylinder (61) is connected with the compression wheel assembly fixing frame (5), and the compression wheel assembly (3) is installed on the compression wheel assembly fixing frame (5).

7. The jelly roll winding apparatus of claim 6, wherein the tail wrap pressing wheel is aligned with the electrode assembly. The compression wheel assembly driving mechanism (6) further includes a horizontal support (63) and a guide rod (64), the guide rod (64) is arranged on the upper end of the compression wheel assembly fixing frame (5), the guide rod (64) is slidably connected with the horizontal support (63), and the compression wheel extension air cylinder (61) is installed on the horizontal support (63) to drive the compression wheel assembly fixing frame (5) to move up and down.

8. The jelly roll winding apparatus of claim 7, wherein, The compression wheel assembly driving mechanism (6) further includes a transverse driving air cylinder (62), the transverse driving air cylinder (62) is installed on a rack, the horizontal support (63) is slidably connected with the rack through a guide rail, and is driven by the transverse driving air cylinder (62), so that the compression wheel assembly (3) can move transversely.

9. The jelly roll winding apparatus of claim 1, wherein, The compression wheel assembly driving mechanism (6) is a servo synchronous belt or a screw module servo.

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