A cylindrical battery assembly pre-welding full-welding automatic welding integrated device

Abstract

This utility model belongs to the field of laser welding technology for battery cells, specifically relating to an integrated automatic pre-welding and full-welding welding device for assembling cylindrical batteries. It includes a base plate and a laser head. A slider is mounted on the base plate, and a welding head mounting plate is mounted on the top of the slider. A linear guide rail is mounted on the welding head mounting plate, and a pre-welding head bearing seat is connected to the linear guide rail. Pre-welding grippers are connected to the pre-welding head bearing seat via a first bearing mounted on the guide rail. A roller seat and a bearing upright plate are mounted on the base plate. A clamping roller is mounted on the roller seat, and a follower shaft is connected to the bearing upright plate via a second bearing. A final welding head bearing seat is mounted on the welding head mounting plate, and a full-welding positioning block is connected to the final welding head bearing seat. A linear bearing is mounted at the end of the full-welding positioning block and extends into the pre-welding grippers. This utility model has a reasonable structure, is easy to operate, effectively reduces equipment costs, eliminates pre-spot welding, and improves product efficiency and yield.

Description

Technical Field

[0001] This utility model belongs to the field of cell laser welding technology, specifically relating to an integrated automatic welding device for pre-welding and full welding of cylindrical battery assembly. Background Technology

[0002] Cylindrical batteries are high-capacity, long-cycle-life, and wide-range operating temperature range batteries. They come in different systems, including lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, cobalt-manganese hybrid, and ternary materials. The casings are available in steel and polymer types. Different material systems offer different advantages, with steel-cased cylindrical lithium iron phosphate batteries being the dominant type. The production process of cylindrical batteries includes multiple steps such as slurry preparation, coating, rolling, winding, assembly, electrolyte injection, and formation. Assembly involves inserting the wound cells into the battery casing and performing steps such as negative electrode tab welding, grooving, and cap welding. During this process, it is crucial to ensure the sealing of the battery casing and the welding quality of the tabs. After the battery case is covered, the cover plate and aluminum casing are first assembled and positioned using a laser. Then, the battery is stepped to the full welding station for full welding. Pre-welding and full welding are performed using two separate lasers. During the stepping and conveying process after pre-welding, there is a risk of the pre-welded points breaking open, causing sealing weld explosions and affecting production efficiency and yield. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an integrated automatic welding device for pre-welding and full welding of cylindrical battery assembly, which integrates pre-welding and full welding of the cell cover aluminum shell, thereby effectively reducing equipment costs, eliminating pre-spot welding and improving product efficiency and yield.

[0004] The purpose of this utility model is achieved as follows: A pre-welding and full-welding automatic integrated device for assembling cylindrical batteries includes a base plate and a laser head. A slider is provided on the base plate, and a welding head mounting plate is provided on the top of the slider. A linear guide rail is provided on the welding head mounting plate, and a pre-welding head bearing seat is connected to the linear guide rail. A pre-welding gripper is connected to the pre-welding head bearing seat through a first bearing provided thereon. A roller seat and a bearing upright plate are provided on the base plate. A clamping roller is provided on the roller seat, and a follower shaft is connected to the bearing upright plate through a second bearing. A final welding head bearing seat is provided on the welding head mounting plate, and a full-welding positioning block is connected to the final welding head bearing seat. A linear bearing is provided at the end of the full-welding positioning block and extends into the pre-welding gripper.

[0005] Furthermore, a buffer mounting base is provided on the base plate, and a buffer is provided on the buffer mounting base.

[0006] Furthermore, limit blocks are provided on both sides of the welding head mounting plate.

[0007] Furthermore, a large air cylinder base plate is provided on the base plate, a large air cylinder is provided on the large air cylinder base plate, and a cylinder connector is connected to the large air cylinder.

[0008] Furthermore, the welding head mounting plate is provided with a small cylinder base, the small cylinder base is provided with a small cylinder, and the small cylinder is connected to a floating joint.

[0009] Furthermore, a bearing seat reinforcing rib is provided on the side of the final welding head bearing seat, and the bearing seat reinforcing rib is connected to the welding head mounting plate; an origin sensor is provided on the final welding head bearing seat.

[0010] Furthermore, a coupling is connected to the final welding head bearing housing, a motor support plate is connected to the end of the coupling, a reducer is connected to the motor support plate, and a servo motor is connected to the reducer.

[0011] Furthermore, the fully welded positioning block is provided with a clamping ring and a follower, and the clamping ring is provided with a sensing plate.

[0012] The beneficial effects of this utility model are as follows: This utility model provides an integrated automatic pre-welding and full-welding device for cylindrical battery assembly, which consists of a servo motor, a reducer, pre-welding grippers, a full-welding positioning block, a cylinder, and bearings for various components. The battery is conveyed to the welding station via a stepper line. The extension and retraction of the large cylinder causes the cylinder base plate to extend, positioning and fixing the battery with the pre-welding grippers. After the battery is positioned, the small cylinder retracts, retracting the pre-welding bearing seat. The full-welding positioning block and the follower shaft in the bearing plate at the rear of the battery then position and fix the battery. After the battery is positioned, the servo motor and reducer rotate, driving the coupling and the full-welding positioning block to rotate the battery together with the clamping rollers under the battery. The full-welding is completed by laser light emission. After welding, the large cylinder retracts, retracting the cylinder base plate and the full-welding positioning block, and the battery is conveyed to the next station via the stepper line. This utility model provides an integrated automatic pre-welding and full-welding device for cylindrical battery assembly, which has a reasonable structure, is easy to operate, effectively reduces equipment costs, eliminates pre-spot welding, and improves product efficiency and yield. Attached Figure Description

[0013] Figure 1 This is an exploded structural diagram of an integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to the present invention.

[0014] Figure 2 This is a schematic diagram of the overall structure of an integrated automatic welding device for pre-welding and full welding of cylindrical battery assembly according to the present invention.

[0015] Figure 3 This is a schematic diagram of the pre-welding gripper of an integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to the present invention.

[0016] Figure 4 This is a schematic diagram of the full welding positioning block of an integrated automatic welding device for pre-welding and full welding of cylindrical battery assembly according to the present invention. Detailed Implementation

[0017] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that all directional indications (such as up-down-left-right-forward-backward...) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0020] like Figure 1-4 As shown, an integrated automatic pre-welding and full-welding welding device for assembling cylindrical batteries includes a base plate 16 and a laser head 8. A slider 21 is mounted on the base plate 16, and a welding head mounting plate 25 is mounted on the top of the slider 21. A linear guide rail 19 is mounted on the welding head mounting plate 25, and a pre-welding head bearing seat 6 is connected to the linear guide rail 19. A pre-welding gripper 9 is connected to the pre-welding head bearing seat 6 via a first bearing 7 mounted on it. A roller seat 14 and a bearing upright plate 13 are mounted on the base plate 16. A clamping roller 12 is mounted on the roller seat 14, and a follower shaft 10 is connected to the bearing upright plate 13 via a second bearing 11. A final welding head bearing seat 28 is mounted on the welding head mounting plate 25, and a full-welding positioning block 1 is connected to the final welding head bearing seat 28. A linear bearing 5 is mounted at the end of the full-welding positioning block 1 and extends into the pre-welding gripper 9.

[0021] This invention integrates the pre-welding and full-welding of the cylindrical battery aluminum casing and cover plate into a single unit, effectively reducing equipment costs and improving product efficiency and yield. The battery cell, after being bent and covered, is transported to the welding station via a stepper line or conveyor belt. It is then clamped by positioning jaws to determine its position. After positioning, the pre-welding jaws retract, and the final welding head clamps it again for full-welding rotation. Once full-welding is complete, the jaws retract, and the battery cell proceeds to the next process.

[0022] The pre-welding gripper must be made of stainless steel. The battery is transferred to the welding station via a stepper line. The extension and retraction of the large air cylinder 15 drives the bottom plate 17 of the large air cylinder to extend, so that the full welding positioning block 1 and the pre-welding gripper 9 position and fix the battery. After the battery is positioned, the small air cylinder 4 retracts and the pre-welding bearing seat 6 is retracted. The full welding positioning block 1 and the follower shaft 10 in the bearing plate 13 at the tail of the battery position and fix the battery.

[0023] After the battery is positioned, the servo motor 32 and the reducer 31 rotate to drive the coupling 35 and the full-welding positioning block 1 to rotate the battery together with the clamping roller 12 under the battery. The full-welding is completed by the laser 8. After the welding is completed, the large air cylinder 15 retracts and the large air cylinder base plate 17 and the full-welding positioning block 1 are retracted. The battery is then transferred to the next station by the stepper line.

[0024] Furthermore, in one embodiment, a buffer mounting base 24 is provided on the base plate 16, and a buffer 23 is provided on the buffer mounting base 24.

[0025] Furthermore, in one embodiment, limit blocks 20 are provided on both sides of the welding head mounting plate 25.

[0026] Furthermore, in one embodiment, a large air cylinder base plate 17 is provided on the base plate 16, a large air cylinder 15 is provided on the large air cylinder base plate 17, and the large air cylinder 15 is connected to a cylinder connector 18.

[0027] Furthermore, in one embodiment, a small cylinder base 26 is provided on the welding head mounting plate 25, a small cylinder 4 is provided on the small cylinder base 26, and the small cylinder 4 is connected to a floating joint 22.

[0028] Furthermore, in one embodiment, a bearing seat reinforcing rib 29 is provided on the side of the final welding head bearing seat 28, and the bearing seat reinforcing rib 29 is connected to the welding head mounting plate 25; an origin sensor 30 is provided on the final welding head bearing seat 28.

[0029] Furthermore, in one embodiment, a coupling 35 is connected to the final welding head bearing housing 28, a motor support plate 34 is connected to the end of the coupling 35, a reducer 31 is connected to the motor support plate 34, and a servo motor 32 is connected to the reducer 31.

[0030] Furthermore, in one embodiment, the fully welded positioning block 1 is provided with a clamping ring 2 and a follower 3, and the clamping ring 2 is provided with a sensing plate 27.

[0031] In summary, this utility model discloses an integrated automatic pre-welding and full-welding device for assembling cylindrical batteries, comprising a servo motor, a reducer, pre-welding grippers, a full-welding positioning block, a cylinder, and bearings for various components. The battery is conveyed to the welding station via a stepper motor. The extension and retraction of the large cylinder 15 causes the cylinder base plate 17 to extend, positioning and fixing the battery with the full-welding positioning block 1 and the pre-welding grippers 9. After the battery is positioned, the small cylinder 4 retracts, retracting the pre-welding bearing seat 6. The full-welding positioning block 1 and the follower shaft 10 within the bearing plate 13 at the rear of the battery then position and fix the battery. After the battery is positioned, the servo motor 32 reduces the speed of the pre-welding and full-welding process. The rotation of the high-speed machine 31 drives the coupling 35 and the full-welding positioning block 1 to rotate the battery together with the clamping roller 12 under the battery. The laser 8 emits light to complete the full-welding process. After welding, the large air cylinder 15 retracts, pulling back the large air cylinder base plate 17 and the full-welding positioning block 1. The battery is then transferred to the next workstation via the stepper line. Compared with existing technologies, this invention reduces the number of welding machines from two to one, effectively lowering equipment costs and minimizing the need for repeated handling of the battery cells after pre-welding, thus improving production efficiency. It also reduces the risk of weld point breakage after pre-welding, leading to poor full-welding and improving production yield. The integrated pre-welding and full-welding process offers better stability and reduces damage to the battery cells during handling. The pre-welding and full-welding positioning grippers facilitate the integration of pre-welding and full-welding, thereby saving costs and improving efficiency.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly, characterized in that, The system includes a base plate (16) and a laser head (8). A slider (21) is provided on the base plate (16). A welding head mounting plate (25) is provided on the top of the slider (21). A linear guide rail (19) is provided on the welding head mounting plate (25). A pre-welding head bearing seat (6) is connected to the linear guide rail (19). A pre-welding gripper (9) is connected to the pre-welding head bearing seat (6) through a first bearing (7) provided thereon. A roller is provided on the base plate (16). The roller seat (14) and bearing plate (13) are provided. The roller seat (14) is provided with a clamping roller (12). The bearing plate (13) is connected to a follower shaft (10) via a second bearing (11). The welding head mounting plate (25) is provided with a final welding head bearing seat (28). The final welding head bearing seat (28) is connected to a full welding positioning block (1). The end of the full welding positioning block (1) is provided with a linear bearing (5) and extends into the pre-welding clamp (9).

2. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: The base plate (16) is provided with a buffer mounting base (24), and the buffer mounting base (24) is provided with a buffer (23).

3. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 2, characterized in that: Limiting blocks (20) are provided on both sides of the welding head mounting plate (25).

4. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: A large air cylinder base plate (17) is provided on the base plate (16), and a large air cylinder (15) is provided on the base plate (17). The large air cylinder (15) is connected to a cylinder connector (18).

5. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: The welding head mounting plate (25) is provided with a small cylinder base (26), the small cylinder base (26) is provided with a small cylinder (4), and the small cylinder (4) is connected to a floating joint (22).

6. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: The side of the final welding head bearing seat (28) is provided with a bearing seat reinforcing rib (29), which is connected to the welding head mounting plate (25); the final welding head bearing seat (28) is provided with an origin sensor (30).

7. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: A coupling (35) is connected to the final welding head bearing seat (28), a motor support plate (34) is connected to the end of the coupling (35), a reducer (31) is connected to the motor support plate (34), and a servo motor (32) is connected to the reducer (31).

8. The integrated automatic welding device for pre-welding and full-welding of cylindrical battery assembly according to claim 1, characterized in that: The fully welded positioning block (1) is provided with a clamping ring (2) and a follower (3), and the clamping ring (2) is provided with a sensing plate (27).

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