Pole piece conveying device and lithium battery production line

Abstract

The utility model provides a pole piece conveying device and a lithium battery production line. The pole piece conveying device comprises a rack, a guide roller, a belt and a driving mechanism, wherein the rack is fixedly arranged on the horizontal ground; the guide rollers are configured to be a plurality of guide rollers which are rotatably arranged on the rack around the axis direction of the guide rollers; the belt is arranged on the guide roller in a sleeving manner; the driving mechanism is arranged on the rack and used for driving the belt to rotate; a guide rib is arranged on the face, making contact with the guide roller, of the belt, and a limiting groove consistent with the guide rib in section shape is formed in the guide roller. The conveying belt has the advantages of being simple in structure, high in reliability and easy to maintain, the possibility of dislocation of the conveying belt can be reduced, and the production quality of lithium batteries can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack production, and in particular to a pole piece conveying device. The utility model also relates to a lithium battery production line including the pole piece conveying device. Background Art

[0002] Lithium batteries are widely used in various electronic devices and vehicles due to their high energy density, long cycle life, low self-discharge rate, and relative lightness. Lithium batteries charge and discharge through the movement of lithium ions between the positive and negative electrodes. To increase the battery's capacity, the manufacturing process requires stacking the cut electrodes in a specific order.

[0003] Currently, the industry generally uses high-speed cutting and stacking machines to cut and stack electrodes. The cut electrodes are transported from the cutting section of the high-speed cutting and stacking machine via a conveyor belt to the vicinity of the stacking table, where they are then grabbed by a robotic arm for stacking. During high-speed operation, the conveyor belt used to transport the electrodes is prone to misalignment due to its high speed and inconsistent tension on the inside and outside. This misalignment affects the consistency of the electrode's transport position, resulting in a decrease in electrode alignment. Furthermore, misalignment can cause the conveyor belt to deviate, leading to edge wear and powder loss. Powder that falls off the conveyor belt can contaminate the battery cells and affect battery quality.

[0004] From the above existing technologies, it can be seen that the conveyor belt used to transport the electrodes in the high-speed cutting and stacking machine is prone to misalignment and deviation, which in turn affects the quality of battery production. Utility Model Content

[0005] In view of this, the present invention aims to provide a pole piece conveying device with good stability, which can reduce the transmission misalignment phenomenon, thereby improving the production quality of lithium batteries.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] The utility model provides a pole piece conveying device, comprising:

[0008] It includes a frame, which is fixedly set on a horizontal ground;

[0009] A plurality of guide rollers are configured to rotate around their own axes and are arranged on the frame;

[0010] A belt is sleeved on the guide roller;

[0011] A driving mechanism, disposed on the frame, for driving the belt to rotate;

[0012] A guide rib is provided on the side of the belt that contacts the guide roller, and a limiting groove having the same cross-sectional shape as the guide rib is provided on the guide roller.

[0013] Furthermore, the cross section of the guide rib is trapezoidal, and the thickness of the guide rib gradually decreases in a direction away from the belt.

[0014] Furthermore, the number of the guide ribs is set to be multiple, and the multiple guide ribs are equidistantly distributed along the width direction of the belt.

[0015] Furthermore, the driving mechanism includes a driving motor, which is arranged on the frame;

[0016] The driving roller is connected to the driving motor and the belt, and can drive the belt to rotate under the action of the driving motor.

[0017] Furthermore, the driving mechanism further includes support plates symmetrically arranged on both sides of the frame;

[0018] The driving motor is detachably arranged between the support plates.

[0019] Furthermore, a negative pressure component is provided on the frame;

[0020] The negative pressure component is in contact with the lower surface of the belt.

[0021] Furthermore, the number of the negative pressure components is set to be multiple;

[0022] The plurality of negative pressure components are evenly distributed along the length direction of the frame.

[0023] Furthermore, a limiting groove having the same cross-sectional shape as the guide rib is provided on the upper surface of the negative pressure assembly.

[0024] Furthermore, the guide roller is rotatably arranged on the frame.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The pole piece conveying device described in the present invention has a frame that supports and limits the other parts of the structure of the present invention, and a guide roller that guides and limits the rotation of the belt. The belt is mounted on the guide roller and can rotate under the drive of the drive mechanism, thereby transporting the pole pieces on the belt surface to a specified position. By providing guide ribs on the contact surface between the belt and the guide roller, and providing a limiting groove on the roller surface of the guide roller that has the same cross-sectional shape as the guide rib, the guide roller can limit the belt in the width direction of the belt, thereby reducing the possibility of misalignment of the conveyor belt and improving the production quality of lithium batteries.

[0027] By setting the cross-sectional shape of the guide rib to an isosceles trapezoid whose thickness gradually decreases in the direction away from the belt, the guide rib can be more easily inserted into the limit groove on the guide roller surface without affecting the structural strength of the connection between the guide rib and the belt, thereby reducing the difficulty of assembly and subsequent maintenance work.

[0028] By setting the guide ribs to three equally spaced ones along the width of the belt, the fiber effect of the guide roller on the belt is further improved, the possibility of misalignment between the belt and the guide roller is reduced, and the purpose of further improving the stability of the belt is achieved.

[0029] Furthermore, by configuring the drive mechanism to consist of a drive motor and a drive roller, the drive roller can be driven by the drive motor to drive the belt, thereby achieving a driving function. By configuring the drive motor in the drive mechanism to be a bidirectional servo motor, the belt can be driven by the drive mechanism to rotate in either the forward or reverse direction and accurately stop at a specified position.

[0030] By arranging support plates symmetrically on both sides of the frame, a location for the drive motor can be provided, so that the drive motor and the frame can be kept fixed. By achieving a detachable connection between the drive motor and the support plates through bolts, the maintenance and replacement process of the drive motor is simplified.

[0031] Secondly, by setting a negative pressure component on the frame that can produce adsorption on the lower surface of the belt, the lower surface of the belt can be kept in contact with the surface of the negative pressure component, thereby ensuring the flatness of the belt transportation surface, reducing the possibility of belt misalignment, and improving the belt transportation accuracy, which is beneficial to improving the production quality of lithium batteries.

[0032] By arranging the negative pressure components into multiple groups evenly distributed along the length of the frame, each part of the belt can maintain adsorption and a smooth surface under the action of the negative pressure components, thereby improving the conveying accuracy of the belt and helping to improve the production quality of lithium batteries.

[0033] By opening a limiting groove on the surface of the negative pressure component with the same cross-sectional shape as the guide rib of the belt, the negative pressure component can limit the belt through the limiting groove, thereby increasing the effective contact area between the belt and the negative pressure component, thereby improving the stability of the negative pressure component's support effect on the belt, and achieving the purpose of further reducing the possibility of belt dislocation.

[0034] Furthermore, by connecting the roller frame used to support the guide roller with the frame to form a rotatable structure, the angle between the guide roller and the frame can be adjusted according to actual needs, ensuring the tension of the guide roller on the belt and reducing the occurrence of belt slippage and dislocation.

[0035] In addition, the utility model also proposes a lithium battery production line equipped with the above-mentioned electrode conveying device.

[0036] The lithium battery production line described in the present invention has the same beneficial effects as the electrode conveying device described above relative to the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 This is a structural diagram of the electrode conveying device in an embodiment of the present utility model;

[0039] Figure 2 This is a top view of the electrode conveying device in an embodiment of the present utility model;

[0040] Figure 3 This is a schematic cross-sectional view of the belt and guide roller in an embodiment of the present invention;

[0041] Figure 4 It is a schematic cross-sectional structure diagram of the belt and negative pressure assembly in an embodiment of the present utility model.

[0042] Description of reference numerals:

[0043] 1. Frame; 2. Guide roller; 3. Belt; 301. Guide rib; 4. Driving mechanism; 401. Driving motor; 402. Driving roller; 403. Support plate; 5. Negative pressure assembly. DETAILED DESCRIPTION

[0044] It should be noted that, unless there is a conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0045] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0046] Taking the electrode conveying device and lithium battery production line described in the present invention as an example, the directional words used in the embodiments, such as "up, down, left, right, front, and back", are defined based on the vehicle's up and down direction (also known as the height direction, or the vehicle's Z direction), left and right direction (also known as the width direction, or the vehicle's Y direction), and front and back direction (also known as the length direction, or the vehicle's X direction). "Inside" and "outside" are defined based on the contours of the corresponding components. For example, "inside" and "outside" are defined based on the vehicle contour, with the side of the vehicle contour closer to the middle being "inside", and the opposite being "outside".

[0047] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0048] The following will refer to the attached Figure 1 To the attached Figure 4 The present invention is described in detail with reference to the embodiments.

[0049] Example 1

[0050] The present embodiment relates to a pole piece conveying device, which adopts a belt structure with guide ribs, and provides a limiting groove compatible with the guide ribs on the roller surface for limiting the rotation of the belt, so that the roller and the belt form a limiting structure in the width direction of the belt itself. This structure has the advantages of simple structure, high reliability and easy maintenance, can reduce the possibility of misalignment of the conveyor belt, and is conducive to improving the production quality of lithium batteries.

[0051] In terms of overall structure, refer to Figure 1 、 Figure 2 and Figure 3The electrode conveying device of this embodiment includes a frame 1, a guide roller 2, a belt 3 and a driving mechanism 4. Among them, the frame 1 is fixedly set on the horizontal ground. The number of guide rollers 2 is set to multiple. Multiple guide rollers 2 are arranged on the frame 1 to rotate around their own axis directions. The belt 3 is sleeved on the guide roller 2, and the side of the belt 3 that contacts the roller surface of the guide roller 2 is provided with a guide rib 301 through an integral molding method. A limiting groove with the same cross-sectional shape as the guide rib 301 is provided on the roller surface of the guide roller 2. The guide rib 301 is clamped in the limiting groove, so that the guide roller 2 forms a position limit for the belt 3 along the width direction of the belt 3. The driving mechanism 4 is installed on the frame 1, and is used to drive the belt 3 to rotate.

[0052] As configured above, the frame 1 supports and limits the other parts of the present application, and the guide roller 2 guides and limits the rotation of the belt 3. The belt 3 is mounted on the guide roller 2 and can rotate under the drive of the drive mechanism 4, thereby transporting the pole piece on the surface of the belt 3 to a designated position. By providing a guide rib 301 on the contact surface between the belt 3 and the guide roller 2, and providing a limiting groove on the roller surface of the guide roller 2 with the same cross-sectional shape as the guide rib 301, the guide roller 2 can limit the belt 3 in the width direction of the belt 3, thereby reducing the possibility of misalignment of the conveyor belt and improving the production quality of lithium batteries.

[0053] Based on the above design ideas, specifically, in this embodiment, refer to Figure 3 The cross-section of the guide rib 301 is an isosceles trapezoid. The thickness of the guide rib 301 gradually decreases in the direction away from the belt 3.

[0054] By setting the cross-sectional shape of the guide rib 301 to an isosceles trapezoid whose thickness gradually decreases in the direction away from the belt 3, the guide rib 301 can be more easily inserted into the limiting groove on the roller surface of the guide roller 2 without affecting the structural strength of the connection with the belt 3, thereby reducing the difficulty of assembly and subsequent maintenance work.

[0055] Reference Figure 3 For the purpose of further improving the stability of the belt 3 , in this embodiment, the number of the guide ribs 301 is set to three that are evenly distributed along the width direction of the belt 3 .

[0056] By setting the guide ribs 301 to be three evenly spaced along the width direction of the belt 3, the fiber effect of the guide roller 2 on the belt 3 is further improved, reducing the possibility of misalignment between the belt 3 and the guide roller 2, thereby further improving the stability of the belt 3.

[0057] Reference Figure 1 and Figure 2In this embodiment, the drive mechanism 4 includes a drive motor 401 and a drive roller 402. The drive motor 401 and the drive roller 402 can form a transmission structure by means of gear meshing. When the drive motor 401 is energized, it can drive the drive roller 402 to rotate. The drive mechanism 4 also includes a support plate 403 mounted on the frame 1. There are two support plates 403, which are located at both ends of the frame 1. The drive motor 401 is detachably mounted between the two support plates 403 by means of bolt connection. The drive motor 401 can be a bidirectional servo motor.

[0058] By configuring the drive mechanism 4 to consist of a drive motor 401 and a drive roller 402, the drive roller 402 can drive the belt 3 to move under the drive action of the drive motor 401, thereby achieving the driving function. By configuring the drive motor 401 in the drive mechanism 4 as a bidirectional servo motor, the belt 3 can be driven by the drive mechanism 4 to rotate in the forward or reverse direction and accurately stop at a specified position.

[0059] For the purpose of improving the stability of the connection structure between the drive motor 401 and the frame 1, refer to Figure 1 and Figure 2 In this embodiment, the driving mechanism 4 further includes a support plate 403. There are two support plates 403, which are symmetrically arranged on both sides of the frame 1. The driving motor 401 is installed between the two support plates 403 by bolt connection.

[0060] By symmetrically arranging the support plates 403 on both sides of the frame 1, a position can be provided for the installation of the drive motor 401, so that the drive motor 401 can be fixed to the frame 1. By achieving a detachable connection between the drive motor 401 and the support plates 403 by bolting, the maintenance and replacement process of the drive motor 401 is simplified.

[0061] Reference Figure 1 、 Figure 2 and Figure 4 In order to keep the belt 3 flat and in close contact, in this embodiment, a negative pressure component 5 is provided on the frame 1, and the negative pressure component 5 is in close contact with the lower surface of the belt 3. The complex component can generate negative pressure to produce adsorption on the lower surface of the belt 3.

[0062] By arranging a negative pressure component 5 on the frame 1 that can produce adsorption on the lower surface of the belt 3, the lower surface of the belt 3 can be kept in contact with the surface of the negative pressure component 5, thereby ensuring the flatness of the transport surface of the belt 3, reducing the possibility of misalignment of the belt 3, and improving the transportation accuracy of the belt 3, which is beneficial to improving the production quality of lithium batteries.

[0063] Reference Figure 1 、 Figure 2 and Figure 4 For the purpose of improving the stability of the belt 3 , in this embodiment, the number of negative pressure components 5 is set to multiple, and the multiple negative pressure components 5 are evenly distributed at equal intervals along the length direction of the frame 1 .

[0064] By arranging the negative pressure components 5 into multiple groups evenly distributed along the length direction of the frame 1, each part of the belt 3 can maintain adsorption and a smooth surface under the action of the negative pressure components 5, thereby improving the conveying accuracy of the belt 3 and helping to improve the production quality of lithium batteries.

[0065] Reference Figure 1 、 Figure 2 and Figure 4 In order to further reduce the possibility of misalignment of the belt 3, in this embodiment, a limiting groove is provided on the upper surface of the negative pressure assembly 5. The shape of the limiting groove is consistent with the cross-sectional shape of the guide rib 301 of the belt 3.

[0066] By opening a limiting groove on the surface of the negative pressure component 5 with the same cross-sectional shape as the guide rib 301 of the belt 3, the negative pressure component 5 can limit the belt 3 through the limiting groove, thereby increasing the effective contact area between the belt 3 and the negative pressure component 5, thereby improving the stability of the supporting effect of the negative pressure component 5 on the belt 3, and achieving the purpose of further reducing the possibility of dislocation of the belt 3.

[0067] Reference Figure 1 and Figure 2 In order to facilitate adjustment of the angle between the guide roller 2 and the frame 1, in this embodiment, the guide roller 2 is rotatably arranged on the frame 1. One end of the roller frame for supporting the guide roller 2 is hinged to the frame 1.

[0068] By connecting the roller frame for supporting the guide roller 2 with the frame 1 to form a rotatable structure, the angle between the guide roller 2 and the frame 1 can be adjusted according to actual needs, ensuring the tensioning force of the guide roller 2 on the belt 3 and reducing the occurrence of slippage and dislocation of the belt 3.

[0069] Example 2

[0070] This embodiment relates to a lithium battery production line, including the electrode conveying device described in the first embodiment.

[0071] The role played by the electrode conveying device in the lithium battery production line is the same as its effect compared with the existing technology. By adopting the electrode conveying device described in Example 1 in the lithium battery production line, the problem of lithium battery production quality decline caused by belt misalignment can be effectively reduced, which is conducive to improving the quality of lithium batteries.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A pole piece conveying device, characterized in that: It includes a frame, which is fixedly set on a horizontal ground; A plurality of guide rollers are configured to rotate around their own axes and are arranged on the frame; A belt is sleeved on the guide roller; A driving mechanism, disposed on the frame, for driving the belt to rotate; A guide rib is provided on the side of the belt that contacts the guide roller, and a limiting groove having the same cross-sectional shape as the guide rib is provided on the guide roller.

2. The electrode conveying device according to claim 1, characterized in that: The cross section of the guide rib is trapezoidal, and the thickness of the guide rib gradually decreases in a direction away from the belt.

3. The electrode conveying device according to claim 1 or 2, characterized in that: The number of the guide ribs is set to be multiple, and the multiple guide ribs are evenly distributed along the width direction of the belt.

4. The electrode conveying device according to claim 1, characterized in that: The driving mechanism includes a driving motor, which is arranged on the frame; The driving roller is connected to the driving motor and the belt, and can drive the belt to rotate under the action of the driving motor.

5. The electrode conveying device according to claim 4, characterized in that: The driving mechanism further includes support plates symmetrically arranged on both sides of the frame; The driving motor is detachably arranged between the support plates.

6. The electrode conveying device according to claim 1, characterized in that: A negative pressure component is provided on the frame; The negative pressure component is in contact with the lower surface of the belt.

7. The electrode conveying device according to claim 6, characterized in that: The number of the negative pressure components is set to be multiple; The plurality of negative pressure components are evenly distributed along the length direction of the frame.

8. The electrode conveying device according to claim 6 or 7, characterized in that: A limiting groove having the same cross-sectional shape as the guide rib is formed on the upper surface of the negative pressure assembly.

9. The electrode conveying device according to claim 1, characterized in that: The guide roller is rotatably arranged on the frame.

10. A lithium battery production line, characterized by: It comprises a pole piece conveying device as described in any one of claims 1 to 9.

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