Tool clamp for laser welding of square battery module

Abstract

The utility model relates to a work fixture for laser welding of a square battery module, which is applied to the field of work fixtures and comprises an electric conveying belt, fixing back plates are symmetrically arranged on the left side and the right side of the upper end of the electric conveying belt, and one ends, close to each other, of the two fixing back plates are fixedly connected with lead limiting perforated back plates. According to the tool clamp for laser welding of the square battery module, when the transverse moving base plate moves horizontally, the middle shaft blocks are installed in the center of the side face of the transverse moving base plate in advance, and the transverse moving base plate moves horizontally, so that the transverse moving base plate moves horizontally, and the middle shaft blocks are installed in the center of the side face of the transverse moving base plate; and the middle shaft block is matched with the spherical flexible block additionally arranged in the center of the transverse strip, and when the middle shaft block and the spherical flexible block are attached, the spherical flexible block extends to the butt joint groove to make contact with the contact sensor, it is guaranteed that the transverse moving base plate is accurately stopped at the welding point position, operation accuracy is guaranteed, and cost and time are saved.

Description

Technical Field

[0001] This utility model relates to a tooling fixture for laser welding of square battery modules, and more particularly to a tooling fixture for laser welding of square battery modules applied in the field of tooling fixtures. Background Technology

[0002] Laser welding of prismatic battery modules is an advanced battery module manufacturing process, primarily used to assemble and connect prismatic battery cells into battery modules. Laser welding utilizes a high-energy-density laser beam as a heat source, rapidly melting the surface of the materials being welded (such as connecting pieces and battery electrodes in a prismatic battery module), followed by cooling and solidification to form a strong connection. When the laser beam is focused on the welding area, the light energy is absorbed by the material and converted into heat energy, causing the material to reach its melting point in a very short time. This welding method features concentrated energy and a small heat-affected zone. For example, when welding the electrodes and connecting pieces of a prismatic battery, the laser beam can precisely act on the contact point, causing localized melting of the electrode and connecting piece materials, avoiding excessive heat impact on other parts of the battery.

[0003] Chinese patent CN221715968U discloses a welding fixture, including a main board, a fixing plate, a sliding pull plate, a fastening end plate, and a spring. The energy storage battery welding fixture is fitted onto the battery module through appropriate holes. During busbar welding, it can protect the surface of the lithium-ion square cell, preventing damage and safety hazards caused by direct laser action on the cell surface in case of laser welding errors. The energy storage battery welding fixture in this application is convenient to use, has good positioning effect, and greatly reduces production costs and improves production efficiency.

[0004] In the positioning stage before welding, due to the lack of a precise and efficient positioning device, it is difficult to accurately place the battery module directly below the output end of the laser welding equipment. This results in deviations in the welding position, which seriously affects the welding quality, thereby reducing the product qualification rate and increasing production costs. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that in the positioning stage before welding, due to the lack of a precise and efficient positioning device, the battery module is difficult to be accurately placed directly below the output end of the laser welding equipment. This leads to deviation in the welding position, which seriously affects the welding quality, thereby reducing the product qualification rate and increasing the production cost.

[0006] To address the aforementioned problems, this utility model provides a tooling fixture for laser welding of square battery modules, comprising an electric conveyor belt, with fixed back plates symmetrically arranged on the left and right sides of the upper end of the electric conveyor belt. A wire limiting opening back plate is fixedly connected to one end of the two fixed back plates that are close to each other, and an electric push rod is fixedly connected to one end of the two fixed back plates that are close to each other. A transverse sliding base is provided at the upper end of the electric conveyor belt, and a central shaft block is provided on both the left and right sides of the transverse sliding base. An additional horizontal bar is fixedly connected to the lower side of one end of the two wire limiting opening back plates that are close to each other. An extension rod is fixedly connected to one end of the extension rod near the central shaft block. An arc-shaped groove is provided at one end of the extension rod near the central shaft block, and a spring is fixedly connected to the inner wall of the arc-shaped groove. A spherical flexible block is fixedly connected to the end of the spring away from the extension rod. A docking groove is provided at one end of the central shaft block near the extension rod, and a contact sensor is fixedly connected to the inner wall of the docking groove.

[0007] In the aforementioned fixture for laser welding of square battery modules, a central axis block is pre-installed at the center of the side of the transverse chassis during its translation. A robotic arm then places the battery module in the center of the transverse chassis. The central axis block engages with a spherical movable block with a horizontal bar at its center. When the two are in contact, the spherical movable block extends into the mating groove and contacts the contact sensor, ensuring the transverse chassis stops precisely at the welding point. This guarantees operational accuracy, reduces subsequent processes, and saves cost and time.

[0008] As a further improvement of this application, the spherical flexible block extends into the docking groove and contacts the contact sensor, and elastic telescopic rods are symmetrically fixedly connected to the front and rear sides of the central block.

[0009] As a further improvement of this application, a clamping top block is fixedly connected to the end of the elastic telescopic rod away from the central axis block, and the two clamping top blocks are respectively clamped on the front and rear sides of the transverse chassis.

[0010] As a further improvement of this application, a square battery module body is placed on the upper end of the transverse chassis, and the square battery module is located between two clamping blocks.

[0011] As another improvement of this application, the electric push rod passes through the inside and outside of the wire limiting opening back plate, and the two clamping blocks are fixedly connected to a flexible contact layer at their close ends.

[0012] As a further improvement to this application, a plurality of pressure-resistant rubber discs are fixedly connected to the upper end of the transverse chassis, and the plurality of pressure-resistant rubber discs are evenly distributed among them.

[0013] As a further improvement to this application, the transverse chassis contacts the bottom of the square battery module body through multiple pressure-resistant rubber discs.

[0014] In summary, in this solution, the square battery module body is placed on a transverse chassis and driven by an electric conveyor belt to move to a predetermined position between fixed back plates. An electric push rod pushes a clamping block to firmly clamp it, ensuring its precise positioning directly below the laser welding equipment. During the transverse chassis movement, a central axis block is pre-installed on its side center, and a robotic arm places the battery module in the center of the transverse chassis. The central axis block cooperates with a spherical flexible block with a horizontal bar at its center. When the two are in contact, the spherical flexible block extends to the docking groove and contacts the contact sensor, ensuring that the transverse chassis stops precisely at the welding point, guaranteeing operational accuracy, reducing subsequent processes, and saving costs and time. In addition, the central axis block can be flexibly engaged on both sides of the transverse chassis by adding a horizontal bar and a clamping top block, adapting to transverse chassis of different sizes, improving the versatility and applicability of the tooling fixtures, and reducing equipment procurement and management costs. Attached Figure Description

[0015] Figure 1 A state diagram showing the placement of a square battery module body on an electric conveyor belt according to the first embodiment of this application;

[0016] Figure 2 This is a side view of the electric conveyor belt according to the first embodiment of this application;

[0017] Figure 3 This is a diagram of the wire limiting opening back plate according to the first and second embodiments of this application;

[0018] Figure 4 This is a lateral chassis diagram of the first and second embodiments of this application;

[0019] Figure 5 This is a magnified view of a partial cut-off section in the first embodiment of this application, showing the addition of a horizontal bar.

[0020] Figure 6 This is a side view showing the addition of a horizontal bar in the first embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Electric conveyor belt; 2. Fixed back plate; 3. Wire limiting opening back plate; 4. Electric push rod; 5. Clamping block; 6. Flexible contact layer; 7. Lateral sliding chassis; 9. Central shaft block; 10. Extension rod crossbar; 11. Spring; 12. Spherical flexible block; 14. Clamping top block; 15. Pressure-resistant rubber disc; 16. Arc-shaped groove; 17. Butt joint groove; 18. Added crossbar; 19. Contact sensor; 20. Elastic telescopic rod. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figure 1-6 This invention illustrates a fixture for laser welding of a square battery module, comprising an electric conveyor belt 1, with symmetrically arranged fixed back plates 2 on the left and right sides of the upper end of the electric conveyor belt 1. A wire limiting hole back plate 3 is fixedly connected to one end of the two fixed back plates 2 that is close to each other, and an electric push rod 4 is fixedly connected to one end of the two fixed back plates 2 that is close to each other. A transverse sliding base 7 is provided at the upper end of the electric conveyor belt 1, and a central shaft block 9 is provided on both the left and right sides of the transverse sliding base 7. The lower end of the two wire limiting hole back plates 3 that is close to each other... A horizontal bar 18 is fixedly connected to the side. An extension rod crossbar 10 is fixedly connected to one end of the horizontal bar 18 near the central axis block 9. An arc-shaped groove 16 is opened at one end of the extension rod crossbar 10 near the central axis block 9. A spring 11 is fixedly connected to the inner wall of the arc-shaped groove 16. A spherical flexible block 12 is fixedly connected to the end of the spring 11 away from the extension rod crossbar 10. A docking groove 17 is opened at one end of the central axis block 9 near the extension rod crossbar 10. A contact sensor 19 is fixedly connected to the inner wall of the docking groove 17.

[0026] Figure 1-6 The spherical flexible block 12 extends into the docking groove 17 and contacts the contact sensor 19. The front and rear sides of the central axis block 9 are symmetrically fixedly connected with elastic telescopic rods 20. The end of the elastic telescopic rod 20 away from the central axis block 9 is fixedly connected with a clamping top block 14. The two clamping top blocks 14 are respectively clamped on the front and rear sides of the transverse sliding chassis 7. The square battery module body is placed on the upper end of the transverse sliding chassis 7. The square battery module is located between the two clamping blocks 5. The electric push rod 4 passes through the inside and outside of the wire limiting opening back plate 3.

[0027] Figure 1-6In this technical solution, the square battery module body is placed on the transverse chassis 7. Driven by the electric conveyor belt 1, it is smoothly moved laterally to a predetermined position between the two fixed back plates 2. During this process, the thrust generated by the electric push rod 4 pushes the clamping block 5 towards the square battery module body, thereby firmly clamping the square battery module body and accurately positioning it directly below the output end of the laser welding equipment, preparing it for subsequent laser welding operations. During the translation process of the transverse chassis 7, the central axis block 9 can be pre-installed at the center of the side of the transverse chassis 7. At the same time, the robot arm accurately places the square battery module body in the center of the transverse chassis 7. When the transverse chassis 7 translates the square battery module body, the central axis block 9 can cooperate with the spherical flexible block 12 at the center of the added crossbar 18. The spherical flexible block 12 is... Positioned at the central axis of the clamping block 5, the spherical flexible block 12 extends further into the docking groove 17 after it is in contact with the outer wall of the central axis block 9, and effectively contacts the contact sensor 19. In this way, it can ensure that the transverse chassis 7 stops precisely at the position of the square battery module body and the target point of laser welding, which greatly helps to ensure the accuracy of the entire operation process, improves the consistency and stability of production, reduces the later inspection and adjustment process, and saves production costs and time. In addition, the central axis block 9 can be flexibly engaged with the sides of the transverse chassis 7 by means of the additional crossbars 18 set at its front and rear and the clamping top block 14, so that the tooling fixture can be adapted to transverse chassis 7 of different sizes and specifications, significantly improving its versatility and applicability, facilitating disassembly and adjustment, and having strong functionality. It reduces the types of tooling fixtures and lowers the equipment procurement and management costs of enterprises.

[0028] Second implementation method:

[0029] Figure 3-4 This invention discloses a tooling fixture for laser welding of a square battery module. Two clamping blocks 5 are fixedly connected to one end of each other with flexible contact layers 6. A plurality of pressure-resistant rubber discs 15 are fixedly connected to the upper end of a transverse base 7. The pressure-resistant rubber discs 15 are evenly distributed among each other. The transverse base 7 contacts the bottom of the square battery module body through the plurality of pressure-resistant rubber discs 15. The presence of the plurality of pressure-resistant rubber discs 15 on the transverse base 7 can effectively reduce the compressive force generated by the heavy square battery module body. At the same time, in conjunction with the two flexible contact layers 6 in the clamping blocks 5 contacting the outer wall of the square battery module body, it can not only enhance the clamping stability of the square battery module body, but also improve the wear resistance of the transverse base 7, extend its service life, and thus improve the overall performance of the tooling fixture, reducing the maintenance and replacement frequency of the equipment.

[0030] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A tooling jig for laser welding of a square battery module, characterized by: The utility model relates to a kind of electric transmission belt, the upper end of the electric transmission belt (1) is symmetrically provided with fixed backplate (2) left and right, two the fixed backplate (2) is fixedly connected with wire limiting aperture backplate (3) in one end of each other, two the fixed backplate (2) is fixedly connected with electric push rod (4) in one end of each other, the output end of the electric push rod (4) is fixedly connected with clamping resistance block (5), the upper end of the electric transmission belt (1) is provided with horizontal shift chassis (7), the left and right sides of the horizontal shift chassis (7) are both provided with middle shaft block (9), two the wire limiting aperture backplate (3) is fixedly connected with additional horizontal bar (18) in one end of each other downside, the additional horizontal bar (18) is fixedly connected with extension rod horizontal column (10) in one end close to middle shaft block (9), the extension rod horizontal column (10) is provided with arc-shaped groove (16) in one end close to middle shaft block (9), the inner side wall of the arc-shaped groove (16) is fixedly connected with spring (11), the one end of the spring (11) away from extension rod horizontal column (10) is fixedly connected with spherical nimble block (12), the one end of the middle shaft block (9) close to extension rod horizontal column (10) is provided with butt joint groove (17), the inner side wall of the butt joint groove (17) is fixedly connected with contact sensor (19).

2. The tooling fixture for laser welding of a square battery module according to claim 1, characterized in that: The spherical nimble block (12) extends into butt joint groove (17) and is in contact with contact sensor (19), the front and rear sides of the middle shaft block (9) are fixedly connected with elastic telescopic rod (20) symmetrically.

3. The tooling fixture for laser welding of square battery modules according to claim 2, characterized in that: The one end of the elastic telescopic rod (20) away from middle shaft block (9) is fixedly connected with clamping top block (14), two the clamping top block (14) is respectively clamped in the front and rear sides of horizontal shift chassis (7).

4. The tooling fixture for laser welding of square battery modules of claim 1, wherein: The upper end of the horizontal shift chassis (7) is placed with square battery module body, the square battery module is located between two clamping resistance blocks (5).

5. The tooling fixture for laser welding of square battery modules of claim 1, wherein: The electric push rod (4) penetrates wire limiting aperture backplate (3) inside and outside, two the clamping resistance blocks (5) are fixedly connected with flexible contact layer (6) in one end of each other.

6. The tooling fixture for laser welding of square battery modules of claim 4, wherein: The upper end of the horizontal shift chassis (7) is fixedly connected with multiple pressure-resistant rubber round pieces (15), multiple pressure-resistant rubber round pieces (15) are evenly distributed.

7. The tooling fixture for laser welding of square battery modules according to claim 6, characterized in that: The horizontal shift chassis (7) is in contact with the bottom of square battery module body by multiple pressure-resistant rubber round pieces (15).

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