An electrode plate rolling device

Abstract

A kind of electric core rubbing device, comprising: fixed frame;Rotary spindle is arranged on fixed frame, dust collecting box is arranged between the spindle upper section and the spindle lower section of rotary spindle, the inner chamber of the lower section of spindle and the inside of dust collecting box are communicated;Straight-through connector is arranged on the peripheral wall of dust collecting box;Rotating disc is arranged on rotary spindle;Electric core rubbing assembly is arranged on rotating disc, electric core rubbing assembly includes: support shaft seat is arranged on rotating disc, rubbing rotation seat is rotatably arranged on support shaft seat about its axis, center hole needle is arranged in the center of rubbing rotation seat, rubbing needle is arranged on the periphery of center hole needle, spline shaft is arranged on support shaft seat, dust removal box is arranged in rubbing rotation seat, dust collecting pipe cavity is arranged in rubbing rotation seat and communicated with the inner chamber of center hole needle, dust collecting pipe is communicated with dust collecting pipe cavity, the other end of dust collecting pipe is communicated with the inside of dust collecting box through straight-through connector.The utility model optimizes dust removal path, improves dust collection efficiency by integrated design of blowing and sucking.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery manufacturing equipment, specifically relating to a cell flattening device used in an automated production line for cylindrical lithium batteries. Background Technology

[0002] Currently, some cylindrical lithium-ion battery manufacturing processes include a tab flattening process, where the tabs at the end of the cell are flattened using a cell flattening device. Flattening brings all the tabs to a single plane, facilitating subsequent current collector welding and ensuring good current conduction. Furthermore, the inward pressing during flattening allows for controllable tab bending, ensuring welding stability in the subsequent current collector welding process. However, the tab flattening process generates copper and aluminum debris (0.1-50μm) and active material dust. If these residues remain on the electrode surface, they can cause micro-short circuits (increasing internal resistance by 10%-15%) and reducing cycle life by more than 20%. Therefore, effectively collecting the debris and dust generated during the flattening process is crucial for ensuring battery quality. Utility Model Content

[0003] The purpose of this invention is to provide a battery cell leveling device that optimizes the dust removal path and improves dust collection efficiency through an integrated blowing and suction design.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A battery cell smoothing device includes: a fixed frame; a rotating main shaft rotatably mounted on the fixed frame about its own axis, the rotating main shaft including an upper section and a lower section, a dust collection box disposed between the upper section and the lower section, the lower section being a hollow tube, the inner cavity of the lower section communicating with the interior of the dust collection box; a straight connector communicating with the interior of the dust collection box disposed on the peripheral wall of the dust collection box; a turntable mounted on the rotating main shaft and rotating with the rotating main shaft; and a battery cell smoothing assembly mounted on the turntable, the battery cell smoothing assembly including: A support shaft seat is mounted on the turntable; a kneading rotary seat is rotatably mounted on the support shaft seat around its own axis; a central hole needle is located at the center of the kneading rotary seat; kneading needles are located around the central hole needle; a splined shaft is mounted on the support shaft seat; and a dust collection box covers the kneading rotary seat. The splined shaft drives the kneading rotary seat to rotate through a rotating structure. The kneading rotary seat has a dust collection pipe cavity that communicates with the inner cavity of the central hole needle. The dust collection pipe and the dust collection tube are connected. The other end of the dust collection tube is connected to the inside of the dust collection box through the straight connector.

[0006] In some embodiments, the top cover of the dust collector has a through hole through which the power supply core passes, and a radially extending air blowing channel is provided inside the top cover. The air blowing channel extends inward from the edge of the top cover to the wall of the through hole, and the outlet of the air blowing channel extends downward at an angle. Several air blowing channels are arranged at circumferential intervals. An air blowing connector is provided circumferentially on the top cover. The air blowing connector is connected to an external air source and communicates with the air blowing channel.

[0007] In some embodiments, the air-blowing connector is an L-shaped connector.

[0008] In some embodiments, the spline shaft and the kneading rotary table are respectively provided with synchronous pulleys, and the spline shaft drives the kneading rotary table to rotate by a synchronous belt passing around the synchronous pulleys.

[0009] In some embodiments, the spline shaft is provided with two synchronous pulleys, which can simultaneously drive the flattening rotary seats of two adjacent sets of the battery cell flattening assemblies to rotate.

[0010] As can be seen from the above technical solution, this utility model sets a dust collection box on the rotating main shaft. The dust collection box rotates with the rotating main shaft, integrating dust collection and suction functions into the rotating main shaft. By using an integrated blowing and suction method with direct shaft connection, not only is the dust collection efficiency improved, but also, through deep integration with the kneading and suction shaft core, the functional coupling of "rotational transmission + centralized dust processing" is achieved, reducing airflow loss and the risk of blockage in the blowing and suction pipes, thereby reducing equipment maintenance costs. Moreover, the dust collection box integrated on the rotating main shaft overcomes the problems of complicated dust removal pipes, long channels, easy spatial conflicts with surrounding components, and high airflow resistance along the way in traditional kneading devices.

[0011] In a preferred embodiment, an air blowing passage and an air blowing connector are provided on the top cover of the dust collection box. Positive pressure air blowing is performed by connecting a pipe to the top of the dust collection box, forming a directional airflow in the dust-generating area, which peels off the dust adsorbed on the surface of the electrode and the flattening wheel. At the same time, it works in conjunction with the negative pressure channel between the dust collection boxes on the rotating main shaft to capture dust and debris. The dust hopper and debris directly enter the dust collection box integrated on the rotating main shaft, shortening the blowing and suction pipe path and improving the dust collection efficiency. Attached Figure Description

[0012] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the battery cell flattening device according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the battery cell flattening assembly according to an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional view of the cell flattening assembly according to an embodiment of the present invention;

[0016] Figure 4 This is a partially exploded structural diagram of the battery cell flattening assembly according to an embodiment of the present invention.

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present invention, for ease of explanation, the drawings illustrating the device structure will be partially enlarged without adhering to the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. It should be noted that the drawings are in a simplified form and use non-precise scales, solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention. Additionally, in the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Terms such as "positive," "negative," "bottom," "upper," "lower," "front," "rear," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] A turret-type cell flattening device is a type of equipment used in cylindrical lithium battery production lines to flatten cells in batches. For example... Figure 1 and Figure 2As shown, the cell leveling device includes a fixed frame 1, a turntable 2, a rotating spindle 3, a cell leveling assembly 4, and a cell clamping assembly 5. The fixed frame 1 is fixed to the frame (not shown) of the lithium battery production line. The rotating spindle 3 is connected to the top plate of the fixed frame 1 via bearings. The turntable 2 is mounted on the rotating spindle 3 and is driven to rotate by the rotating spindle 3. The rotating spindle 3 receives the rotational force from an external drive motor (not shown), which drives the turntable 2 to rotate around the axis of the rotating spindle 3.

[0021] like Figure 2 and Figure 3 As shown, the rotating spindle 3 in this embodiment is divided into an upper spindle section 3-1 and a lower spindle section 3-2. A dust collection box 6 is provided between the upper spindle section 3-1 and the lower spindle section 3-2, and the interior of the dust collection box 6 is a main dust collection chamber. A straight connector 7 communicating with the main dust collection chamber is provided on the peripheral wall of the dust collection box 6. The dust collection box 6 is fixedly connected to both the upper spindle section 3-1 and the lower spindle section 3-2. When the rotating spindle 3 rotates, the dust collection box 6 and the rotating spindle 3 rotate synchronously. The lower spindle section 3-2 is a hollow tube with openings at both ends. The dust collection box 6 and the inner cavity of the lower spindle section 3-2 are connected. The debris and dust collected in the dust collection box 6 are discharged outward through the outlet at the bottom of the inner cavity of the lower spindle section 3-2. In this embodiment, the rotating spindle 3 consists of an upper spindle section 3-1, a dust collection box 6, and a lower spindle section 3-2 connected in sequence. By setting a dust collection box 6 at the lower part of the rotating spindle 3 and rotating synchronously with the rotating spindle 3, and the lower spindle section 3-2 adopting a hollow tube structure and communicating with the inside of the dust collection box 6, the rotating spindle 3 can also have the function of dust collection. It can blow and suck the dust generated by kneading into the shaft core and discharge it, realizing the integrated blowing and sucking function of "rotational transmission + centralized dust treatment".

[0022] Multiple sets of cell flattening assemblies 4 are arranged at intervals along the circumference on the turntable 2. A cell clamping assembly 5 is located above the cell flattening assembly 4 and is used to clamp the cell 100. The cell clamping assembly 5 and the cell flattening assembly 4 are arranged in a one-to-one correspondence. Both the cell clamping assembly 5 and the cell flattening assembly 4 rotate synchronously with the rotating spindle 3.

[0023] Reference Figure 2 , Figure 3 and Figure 4The battery cell leveling assembly 4 in this embodiment includes a support shaft seat 4-1, leveling needles 4-2, a leveling rotary seat 4-3, a center hole needle 4-4, a dust collection box 4-5, a splined shaft 4-6, and a dust collection pipe 4-7. The support shaft seat 4-1 is mounted on the turntable 2. The leveling rotary seat 4-3 is rotatably mounted on the support shaft seat 4-1. The center hole needle 4-4 is located at the center of the leveling rotary seat 4-3, and the leveling needles 4-2 are spaced circumferentially on the leveling rotary seat 4-3, located around the center hole needle 4-4. The kneading rotary table 4-3 has a dust collection chamber 4-3a that communicates with the inner cavity of the central hole needle 4-4. A dust collection pipe 4-7 passes through the support shaft seat 4-1 and is located at the bottom of the kneading rotary table 4-3. One end of the dust collection pipe 4-7 is connected to the dust collection chamber 4-3a, and the other end is connected to the dust collection box 6 via a straight connector 7. This is used to collect debris and dust generated during the kneading process. The dust collection box 4-5 encloses the kneading rotary table 4-3, preventing debris and dust from scattering during kneading and facilitating better dust extraction.

[0024] Splined shaft 4-6 is mounted on support shaft seat 4-1 via bearings. Splined shaft 4-6 receives the rotational driving force from the kneading drive motor and transmits this force to the kneading rotary seat 4-3, which in turn drives the kneading needles 4-2 mounted on the kneading rotary seat 4-3 to rotate, thus kneading the battery cells. In this embodiment, a synchronous pulley 4-8 is provided on splined shaft 4-6, and another synchronous pulley 4-8 is provided at the lower part of the kneading rotary seat 4-3. A synchronous belt 4-9 bypasses the synchronous pulleys 4-8 on both splined shaft 4-6 and kneading rotary seat 4-3, thereby driving the kneading needles 4-2 to advance. This embodiment uses two synchronous pulleys 4-8 on splined shaft 4-6, which can simultaneously drive the kneading action of two adjacent battery cell kneading assemblies 4, improving transmission efficiency and simplifying the transmission structure.

[0025] In this embodiment, the bottom of the dust collection box 4-5 is open, and the flattening needle 4-2 is placed inside it, thus preventing dust and debris from scattering during the flattening process of the battery cell. The top cover of the dust collection box 4-5 has a through hole 4-5a at its center, through which the end of the battery cell 100 passes. The end of the battery cell 100 can extend into the dust collection box 4-5 through the through hole 4-5a, allowing the flattening needle 4-2 to flatten the end of the battery cell. The top cover of the dust collection box 4-5 has radially extending air blowing channels 4-5b, several of which are spaced circumferentially. The air blowing channels 4-5b extend inward from the edge of the top cover to the wall of the through hole 4-5a. The outlet of the air blowing channels 4-5b extends downward at an angle, allowing air to be blown downward at an angle, concentrating the debris and dust generated during the flattening process at the bottom of the dust collection box 4-5, preventing debris and powder from scattering upward and overflowing, making collection difficult.

[0026] An air blowing connector 8 is disposed around the circumference of the top cover of the dust collector 4-5, and the air blowing connector 8 is connected to the air blowing channel 4-5b inside the top cover of the dust collector 4-5. In this embodiment, the air blowing connector 8 is an L-shaped connector, and several air blowing connectors 8 are arranged at intervals along the circumference of the dust collector 4-5. The air blowing connectors 8 are connected to an external air blowing source (not shown), so that air can be blown into the dust collector 4-5 through the air blowing channel 4-5b.

[0027] The dust collection box 6 on the rotating main shaft 3 is the main discharge end and is connected to the external negative pressure dust collection source to provide dust collection power; the straight connector 7 is connected to the dust collection pipe 4-7. When the negative pressure dust collection source is started, the dust and debris generated during the kneading process pass through the dust collection pipe 4-7, the straight connector 7, the dust collection box 6, and the lower section 3-2 of the main shaft in sequence before being discharged outward; at the same time, the airflow generated by the external air blowing source passes through the air blowing connector 8 and the air blowing channel 4-5b in sequence from top to bottom into the dust collection box 4-5. The downward airflow is more conducive to concentrating the debris and dust generated during the kneading process to the bottom of the dust collection box 4-5, and then sucking them into the dust collection box 6.

[0028] In this embodiment, a dust collection box is set at the lower part of the rotating spindle, integrating the dust collection function into the rotating spindle, and the air blowing connector is set at the top of the dust collection box, which shortens the airflow path for blowing and suction, reduces the risk of dust blockage, and can also reduce the wear of the blowing and suction pipes.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell flattening device, characterized in that, include: Fixed frame; A rotating spindle is rotatably mounted on the fixed frame around its own axis. The rotating spindle includes an upper spindle section and a lower spindle section. A dust collection box is disposed between the upper spindle section and the lower spindle section. The lower spindle section is a hollow tube, and its inner cavity communicates with the interior of the dust collection box. A straight connector communicating with the interior of the dust collection box is disposed on the peripheral wall of the dust collection box. A turntable mounted on the main rotating shaft and rotating with the main rotating shaft; The battery cell smoothing assembly is mounted on the turntable. The battery cell smoothing assembly includes: a support shaft seat mounted on the turntable; a smoothing rotary seat rotatably mounted on the support shaft seat around its own axis; a central hole pin located at the center of the smoothing rotary seat; smoothing needles located around the central hole pin; a spline shaft mounted on the support shaft seat; and a dust collection box enclosing the smoothing rotary seat. The spline shaft drives the smoothing rotary seat to rotate via a rotating structure. The smoothing rotary seat has a dust collection pipe cavity communicating with the inner cavity of the central hole pin. The dust collection pipe and the dust collection tube are connected. The other end of the dust collection tube is connected to the inside of the dust collection box via the straight connector.

2. The cell flattening device as described in claim 1, characterized in that: The dust collector has a through hole in the center of its top cover for the power supply core to pass through. The top cover has a radially extending air blowing channel that extends inward from the edge of the top cover to the wall of the through hole. The outlet of the air blowing channel extends downward at an angle. Several air blowing channels are spaced apart circumferentially. The top cover has an air blowing connector that is connected to an external air source and communicates with the air blowing channels.

3. The cell flattening device as described in claim 2, characterized in that: The air blowing connector is an L-shaped connector.

4. The cell flattening device as described in claim 1, characterized in that: Synchronous pulleys are respectively provided on the spline shaft and the kneading rotary table. The spline shaft drives the kneading rotary table to rotate by a synchronous belt that passes around the synchronous pulley.

5. The cell flattening device as described in claim 4, characterized in that: The splined shaft is equipped with two synchronous pulleys, which can simultaneously drive the flattening rotary seats of two adjacent sets of the battery cell flattening assemblies to rotate.

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