Battery electrode side high-precision gluing device and method

Abstract

This invention discloses a high-precision adhesive coating device and method for the sides of battery electrodes, comprising: a rotating platform; at least two worktables circumferentially spaced on the rotating platform for supporting electrode sheets; a loading station located around the rotating platform, including a first conveying module and an adsorption claw plate, the adsorption claw plate adsorbing the electrode sheets from the loading tray and transporting them to the worktable at the loading station via the first conveying module; and a vision positioning station. This invention integrates multiple worktables on a rotating platform, with the loading, vision positioning, and electro-hydraulic inkjet printing stations arranged in a circular layout, resulting in a compact structure. Each worktable has an independent motor underneath, allowing for individual adjustment of the electrode sheet angle and completion of edge-changing actions. The vision system employs dual cameras working collaboratively, in conjunction with a control unit to precisely compensate the electro-hydraulic needle tip, achieving micron-level adhesive coating. The entire device boasts a high degree of automation and precise positioning, providing a reliable hardware foundation for high-precision adhesive coating of battery electrode sides.

Description

Technical Field

[0001] This invention relates to the field of battery electrode technology, and in particular to a high-precision adhesive coating device and method for the side of a battery electrode. Background Technology

[0002] During the die-cutting or laser-cutting process of lithium battery electrode sheets, metal burrs are easily generated on the edges. Large burrs may puncture the electrode sheet or separator during subsequent production or use, causing a short circuit and posing a safety hazard.

[0003] In current mass production technologies, the metal current collector typically protrudes 2-3 mm beyond the edges of the positive and negative electrode materials. This physical isolation prevents burrs from directly contacting the electrode materials, reducing the risk of short circuits. However, this approach reduces the effective contact area of ​​the electrodes, leading to a decrease in battery energy density.

[0004] To address the burr problem, there is also a solution of coating and wrapping the edges of the electrode using a dispensing method. However, the adhesive sprayed by traditional dispensing technology is relatively large, with a minimum thickness of about 150μm, which far exceeds the thickness of the electrode itself. This not only affects the subsequent winding or stacking process of the electrode, but also makes it difficult to promote its application in the field of battery electrodes.

[0005] Therefore, how to effectively wrap the burrs on the edge of the electrode and ensure safety without reducing the battery energy density, while meeting the efficiency requirements of mass production, is a technical problem that urgently needs to be solved in this field.

[0006] To address the above issues, we have developed a high-precision adhesive coating device and method for the sides of battery electrodes. Summary of the Invention

[0007] This invention discloses a high-precision adhesive coating device and method for the side of battery electrodes, aiming to solve the technical problems in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A high-precision adhesive coating device and method for the side of battery electrodes, comprising: Rotating platform; At least two worktables, circumferentially spaced, are arranged on the rotating platform to support the electrode sheets; The loading station is located on the periphery of the rotating platform and includes a first conveying module and an adsorption claw plate. The adsorption claw plate is used to adsorb the electrode sheet from the loading plate and transport the electrode sheet to the worktable located at the station through the first conveying module. A visual positioning station is set on the periphery of the rotating platform, including a positioning camera and an angle camera mounted on the camera alignment electrode. The positioning camera and the angle camera are used to acquire the position and angle information of the electrode. A printing station is set around the rotating platform and includes an electro-hydraulic component platform, an electro-hydraulic needle mounted on the electro-hydraulic component platform, and a second conveying module for driving the electro-hydraulic component platform to move. The electro-hydraulic needle is used to spray adhesive on the edge of the electrode sheet. A monitoring camera is installed at the printing station to monitor the printing process; The control unit is connected to the rotating platform, the first conveying module, the second conveying module, the positioning camera, the angle camera, the monitoring camera, and the electro-hydraulic needle, respectively. It is used to control the electro-hydraulic needle to precisely spray the edge of the electrode at the printing station based on the information obtained by the vision camera.

[0009] In a preferred embodiment, a motor is connected below the worktable, the motor is fixedly connected to the rotating platform, and a glass partition is provided between the motor and the worktable.

[0010] In a preferred embodiment, the positioning camera and the angle camera are mounted on the camera alignment electrode and can move along it to accommodate electrode sheets of different sizes.

[0011] In a preferred embodiment, the motor is used to drive the worktable to rotate based on the angle information acquired by the angle camera, so as to complete the angle compensation of the electrode.

[0012] In a preferred embodiment, the control unit controls the second transmission module to drive the electro-hydraulic assembly platform to move based on the position information acquired by the positioning camera, so that the electro-hydraulic needle performs position compensation at the printing station to accurately align with the edge of the electrode sheet.

[0013] In a preferred embodiment, the motor is configured as a DD motor.

[0014] A high-precision adhesive coating and printing method for the side of battery electrodes includes the following steps: Step S1: Loading. The electrode sheet is picked up from the loading tray and loaded onto the worktable located at the loading station by the first conveying module and the adsorption claw plate. Step S2: Rotation positioning. The worktable carrying the electrode is rotated to the vision positioning station by a rotating platform. The positioning camera and angle camera installed on the camera alignment electrode capture the two corners of the electrode to obtain the position deviation information and angle deviation information of the electrode. Step S3: Angle compensation. Based on the angle deviation information obtained by the angle camera, the angle of the electrode is adjusted by driving the worktable to rotate via the motor under the worktable. Step S4: Rotary printing. The electrode sheet with angle compensation is rotated to the printing station by the rotating platform. According to the position deviation information obtained by the positioning camera, the second transmission module drives the current fluid component platform to move, so that the current fluid needle moves above the edge of the electrode sheet and starts printing to form an adhesive coating on the edge of the electrode sheet. At the same time, the printing process is monitored in real time by the monitoring camera. Step S5: Side-changing cycle. The worktable is rotated by a motor to change the edge of the electrode. Then, steps S2 to S4 are repeated until the coating of all predetermined edges of the electrode is completed.

[0015] In a preferred embodiment, in step S, an angle camera is used to capture one corner of the electrode to obtain angle deviation information, and a positioning camera is used to capture another corner of the electrode to obtain position deviation information.

[0016] In a preferred embodiment, each time the rotating platform rotates, each workbench simultaneously moves to the next station, allowing different electrodes to undergo different processes simultaneously at the loading station, vision positioning station, and printing station, thus achieving parallel processing.

[0017] In a preferred embodiment, the thickness of the adhesive coating printed by the electrofluid needle is less than or equal to 30 micrometers.

[0018] The high-precision adhesive coating device and method for battery electrode sides provided by this invention have the following advantages: 1. This device integrates multiple worktables on a rotating platform, with the feeding, vision positioning, and printing stations arranged in a compact, circular layout. Each worktable has an independent motor underneath, allowing for individual adjustment of the electrode angle and completion of edge-changing operations. The vision system employs dual cameras working in conjunction with a control unit to precisely compensate for the current-voltage needle tip, achieving micron-level adhesive application. The entire device boasts a high degree of automation and precise positioning, providing a reliable hardware foundation for adhesive application on the sides of battery electrodes.

[0019] 2. This method utilizes the intermittent rotation of a rotating platform to allow the feeding, vision positioning, and printing processes to operate in parallel, significantly improving production efficiency. The vision positioning stage employs a dual-camera strategy, separately acquiring angle and positional deviations, which are then compensated for by different actuators to ensure printing accuracy. The edge-changing action is independently completed by a motor beneath the worktable, eliminating the need for the rotating platform and ensuring a highly efficient and smooth process. This method can reliably achieve continuous adhesive coating on all four sides of the electrode sheet, meeting the efficiency and consistency requirements of mass production. Attached Figure Description

[0020] Figure 1 This is a top view of a high-precision adhesive coating device for the side of a battery electrode proposed in this invention.

[0021] Figure 2This is a side view of a high-precision adhesive coating device for the side of a battery electrode proposed in this invention.

[0022] Figure 3 This is a schematic flowchart of a high-precision adhesive coating and inkjet printing method for the side of a battery electrode proposed in this invention.

[0023] In the attached diagram: 1. First conveying module; 2. Adsorption claw plate; 3. Worktable; 4. Rotary platform; 5. Camera alignment electrode; 6. Positioning camera; 7. Angle camera; 8. Monitoring camera; 9. Electromagnetic needle; 10. Second conveying module; 11. Electromagnetic assembly platform; 12. Electrode; 13. Glass; 14. Motor. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] This invention discloses a battery electrode side coating electrohydrodynamic inkjet printing device and method.

[0026] Reference Figure 1 , Figure 2 and Figure 3 As shown, a high-precision adhesive coating device and method for the side of a battery electrode includes: Rotating platform 4; At least two worktables 3 are circumferentially spaced on the rotating platform 4 to support the electrode 12; The loading station is located on the periphery of the rotating platform 4 and includes a first conveying module 1 and an adsorption claw plate 2. The adsorption claw plate 2 is used to adsorb the electrode 12 from the loading plate and transport the electrode 12 to the workbench 3 located at the station through the first conveying module 1. The visual positioning station is located on the periphery of the rotating platform 4, including a positioning camera 6 and an angle camera 7 mounted on the camera alignment electrode 5. The positioning camera 6 and the angle camera 7 are used to acquire the position and angle information of the electrode 12. The printing station is located on the periphery of the rotating platform 4 and includes an electro-hydraulic component platform 11, an electro-hydraulic needle 9 mounted on the electro-hydraulic component platform 11, and a second conveying module 10 for driving the electro-hydraulic component platform 11 to move. The electro-hydraulic needle 9 is used to spray adhesive on the edge of the electrode 12. Monitoring camera 8 is installed at the printing station to monitor the printing process; The control unit is connected to the rotating platform 4, the first conveying module 1, the second conveying module 10, the positioning camera 6, the angle camera 7, the monitoring camera 8, and the electro-hydraulic needle 9, respectively. It is used to control the electro-hydraulic needle 9 to perform precise spraying on the edge of the electrode 12 at the printing station based on the information obtained by the vision camera. In this embodiment: During operation, the rotating platform 4 rotates intermittently, sequentially delivering the worktable 3 loaded with electrode sheets 12 to each workstation. The loading station completes the electrode loading, the vision positioning station obtains the position and angle deviation of the electrode sheets through dual cameras, the printing station accurately sprays glue according to the compensation information, and the monitoring camera observes the printing status in real time. The entire process is uniformly coordinated by the control unit.

[0027] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, a motor 14 is connected to the bottom of the worktable 3, the motor 14 is fixedly connected to the rotating platform 4, and a glass 13 is provided between the motor 14 and the worktable 3. In this embodiment, glass 13 provides a flat and stable support surface for electrode 12, ensuring that the electrode remains flat during printing. Motor 14 can independently drive the stage 3 to rotate, used to adjust the electrode angle after visual positioning, and to switch to the next edge after printing one edge.

[0028] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, the positioning camera 6 and the angle camera 7 are mounted on the camera alignment electrode 5 and can move along it to adapt to electrode sheets 12 of different sizes. In this embodiment, when producing electrode sheets of different specifications, the camera alignment electrode 5 adjusts the distance between the two cameras according to the size of the electrode sheet, so that the positioning camera 6 and the angle camera 7 can always accurately capture the two opposite corners of the electrode sheet, ensuring the versatility and accuracy of the vision system.

[0029] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, the motor 14 is used to drive the worktable 3 to rotate according to the angle information obtained by the angle camera 7, so as to complete the angle compensation of the electrode 12. In this embodiment: After the angle camera 7 captures a corner of the electrode, it calculates the rotational deviation of the electrode relative to the reference position. The control unit sends the deviation value to the motor 14, and the motor 14 drives the worktable 3 to rotate by the corresponding angle so that the electrode is completely aligned before entering the printing station.

[0030] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, the control unit controls the second transmission module 10 to drive the electro-hydraulic assembly platform 11 to move according to the position information obtained by the positioning camera 6, so that the electro-hydraulic needle 9 can be positionally compensated at the printing station to accurately align with the edge of the electrode 12. In this embodiment: After the positioning camera 6 obtains the precise coordinates of the center or another corner of the electrode, the control unit calculates the X / Y offset that the electro-hydraulic needle 9 needs to move, and drives the electro-hydraulic assembly platform 11 to move the needle through the second transmission module 10, so as to ensure that the needle is always aligned with the ideal adhesive coating trajectory of the electrode edge.

[0031] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, motor 14 is configured as a DD motor; In this embodiment, the DD motor (direct drive motor) has no reduction gear and features high precision and high response characteristics. It can quickly and accurately perform angle compensation and edge switching actions, meeting the requirements of repeatability positioning accuracy for electrode edge coating.

[0032] A high-precision adhesive coating and printing method for the side of battery electrodes includes the following steps: Step S1: Loading. The electrode 12 is picked up from the loading tray and loaded onto the workbench 3 located at the loading station by the first conveying module 1 and the adsorption claw plate 2. Step S2: Rotation positioning. The worktable 3 carrying the electrode 12 is rotated to the vision positioning station by the rotating platform 4. The positioning camera 6 and the angle camera 7 installed on the camera alignment electrode 5 are used to capture the two corners of the electrode 12 respectively to obtain the position deviation information and angle deviation information of the electrode 12. Step S3: Angle compensation. Based on the angle deviation information obtained by the angle camera 7, the worktable 3 is rotated by the motor 14 under the worktable 3 to adjust the angle of the electrode 12. Step S4: Rotation printing. The electrode 12 with angle compensation completed is rotated to the printing station by the rotation platform 4. According to the position deviation information obtained by the positioning camera 6, the second conveying module 10 is controlled to drive the current fluid assembly platform 11 to move, so that the current fluid needle 9 moves above the edge of the electrode 12 and the printing is started to form an adhesive coating on the edge of the electrode 12. At the same time, the printing process is monitored in real time by the monitoring camera 8. Step S5: Side-changing cycle, drive the worktable 3 to rotate by the motor 14 to change the side of the electrode 12, and then repeat steps S2 to S4 until the adhesive is applied to all predetermined edges of the electrode 12. This embodiment: This method uses a rotating platform as its core, separating the three processes of feeding, vision positioning, and printing spatially while overlapping them temporally. Each workbench independently undergoes the above steps, and multiple workbenches work in parallel, significantly shortening the production cycle time per piece. Angle compensation and position compensation are respectively completed by motor 14 and the second conveyor module 10, ensuring the accuracy of each print.

[0033] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, in step S2, the angle camera 7 captures one corner of the electrode 12 to obtain angle deviation information, and the positioning camera 6 captures the other corner of the electrode 12 to obtain position deviation information. In this embodiment, the two cameras have clearly defined roles: the angle camera 7 focuses on the angular offset of the electrode 12, and its image is used to calculate the rotation amount; the positioning camera 6 focuses on the planar position of the electrode 12, and its coordinates are used to calculate the translation amount. This division of labor avoids the coupling error caused by a single camera simultaneously calculating angle and position, thus improving compensation accuracy.

[0034] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, each time the rotating platform 4 rotates, each workbench 3 simultaneously enters the next station, so that different electrodes 12 can simultaneously perform different processes at the loading station, vision positioning station and printing station, thus achieving parallel processing. In this embodiment, taking four worktables as an example, each time the rotating platform rotates 90°, all worktables move simultaneously to one station. For example, when worktable A is printing, worktable B is in vision positioning, worktable C is changing edges, and worktable D is loading material. In this way, the three peripheral stations always have electrode sheets 12 being processed, maximizing equipment utilization.

[0035] Reference Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, the thickness of the adhesive coating printed by the electro-hydraulic needle 9 is less than or equal to 30 micrometers; In this embodiment, electrohydraulic inkjet printing technology utilizes an electric field to pull liquid into a microjet, enabling the spraying of an extremely thin adhesive layer. By controlling the coating thickness to below 30 micrometers, it effectively covers the burrs on the edge of the electrode 12 without affecting subsequent winding or stacking processes due to excessive adhesive layer thickness. It also avoids the problem of traditional dispensing methods being unable to be applied to the battery electrode 12 due to excessive adhesive layer thickness.

[0036] The control unit in this application is prior art and is not shown in the drawings or drawing numbers.

[0037] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A high-precision gluing device for the side edges of battery electrodes, characterized in that, include: Rotating platform (4); At least two worktables (3) are circumferentially spaced on the rotating platform (4) for carrying electrode sheets (12). The loading station is located on the periphery of the rotating platform (4) and includes a first conveying module (1) and an adsorption claw plate (2). The adsorption claw plate (2) is used to adsorb the electrode (12) from the loading plate and transport the electrode (12) to the workbench (3) located at the station through the first conveying module (1). The visual positioning station is set on the periphery of the rotating platform (4) and includes a positioning camera (6) and an angle camera (7) mounted on the camera alignment electrode (5). The positioning camera (6) and the angle camera (7) are used to obtain the position and angle information of the electrode (12). The printing station is located on the periphery of the rotating platform (4) and includes a current-current component platform (11), a current-current needle (9) mounted on the current-current component platform (11), and a second transfer module (10) for driving the current-current component platform (11) to move. The current-current needle (9) is used to spray glue on the edge of the electrode (12). A monitoring camera (8) is installed at the printing station to monitor the printing process; The control unit is connected to the rotating platform (4), the first conveying module (1), the second conveying module (10), the positioning camera (6), the angle camera (7), the monitoring camera (8), and the electro-hydraulic needle (9), respectively, and is used to control the electro-hydraulic needle (9) to perform precise spraying on the edge of the electrode sheet (12) at the printing station according to the information obtained by the vision camera.

2. The high-precision adhesive coating device for the battery electrode side according to claim 1, characterized in that, A motor (14) is connected to the bottom of the workbench (3). The motor (14) is fixedly connected to the rotating platform (4). A glass (13) is provided between the motor (14) and the workbench (3).

3. The high-precision adhesive coating device for the battery electrode side according to claim 1, characterized in that, The positioning camera (6) and angle camera (7) are mounted on the camera alignment electrode (5) and can move along it to adapt to electrode sheets (12) of different sizes.

4. The high-precision adhesive coating device for the battery electrode side according to claim 2, characterized in that, The motor (14) is used to drive the worktable (3) to rotate according to the angle information obtained by the angle camera (7) in order to complete the angle compensation of the electrode (12).

5. The high-precision adhesive coating device for the side of the battery electrode according to claim 1, characterized in that, The control unit controls the second transmission module (10) to drive the electro-hydraulic assembly platform (11) to move based on the position information obtained by the positioning camera (6), so that the electro-hydraulic needle (9) can be positionally compensated at the printing station to accurately align with the edge of the electrode (12).

6. The high-precision adhesive coating device for the battery electrode side according to claim 4, characterized in that, The motor (14) is configured as a DD motor.

7. A high-precision adhesive coating method for the side of a battery electrode according to any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Loading, the electrode sheet (12) is picked up from the loading tray and loaded onto the workbench (3) located at the loading station by the first conveying module (1) and the adsorption claw plate (2); Step S2: Rotation positioning. The worktable (3) carrying the electrode (12) is rotated to the vision positioning station by the rotating platform (4). The positioning camera (6) and the angle camera (7) installed on the camera alignment electrode (5) are used to capture the two corners of the electrode (12) respectively to obtain the position deviation information and angle deviation information of the electrode (12). Step S3: Angle compensation. Based on the angle deviation information obtained by the angle camera (7), the worktable (3) is rotated by the motor (14) under the worktable (3) to adjust the angle of the electrode (12). Step S4: Rotation printing. The electrode (12) with completed angle compensation is rotated to the printing station by the rotation platform (4). According to the position deviation information obtained by the positioning camera (6), the second transfer module (10) is controlled to drive the electro-hydraulic assembly platform (11) to move, so that the electro-hydraulic needle (9) moves to above the edge of the electrode (12) and the printing is started to form an adhesive coating on the edge of the electrode (12). At the same time, the printing process is monitored in real time by the monitoring camera (8). Step S5: Side-changing cycle, drive the worktable (3) to rotate by the motor (14) to change the side of the electrode (12), and then repeat steps S2 to S4 until the coating of all predetermined edges of the electrode (12) is completed.

8. The high-precision adhesive coating method for the side of the battery electrode according to claim 7, characterized in that, In step S2, an angle camera (7) is used to capture one corner of the electrode (12) to obtain angle deviation information, and a positioning camera (6) is used to capture the other corner of the electrode (12) to obtain position deviation information.

9. The high-precision adhesive coating method for the side of the battery electrode according to claim 7, characterized in that, Each time the rotating platform (4) rotates, each workbench (3) simultaneously enters the next station, so that different electrodes (12) can simultaneously perform different processes at the loading station, vision positioning station and printing station, thus achieving parallel processing.

10. The high-precision adhesive coating method for the side of the battery electrode according to claim 7, characterized in that, The thickness of the adhesive coating printed by the electrofluid needle (9) is less than or equal to 30 micrometers.

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