Battery cell welding and collecting equipment

Abstract

The utility model relates to battery cell welding and collecting equipment which comprises a welding device used for being arranged above a battery cell, the welding device comprises a first driving mechanism and a welding assembly used for welding a to-be-welded first position of the battery cell, and the welding assembly comprises a welding pressing nozzle; the welding pressing nozzle is driven by the first driving mechanism to move close to or away from the first position in the vertical direction. And the welding slag receiving mechanism comprises a slag receiving box used for receiving welding slag falling from the welding pressing nozzle, the slag receiving box can be located above the battery cell, and when the welding pressing nozzle moves upwards to be away from the first position, the slag receiving box is in a first state located between the first position and the welding pressing nozzle. The welding slag falling from the welding pressure nozzle reliably falls into the slag receiving box, so that the welding slag is prevented from falling into the first position, the problem of short circuit failure of a battery cell caused by the fact that the welding slag falls into the first position is further avoided, and the battery cell can be effectively protected.

Description

Technical Field

[0001] This application relates to the field of battery cell welding technology, and in particular to a battery cell welding collection device. Background Technology

[0002] Dust control is crucial for the safety performance of lithium batteries during manufacturing, especially for stacked lithium batteries. For example, welding slag can form during the tab welding process. This is because the molten pool becomes unstable due to fluctuations in laser energy absorbed by the material and the laser itself, causing liquid splashing and forming welding slag. ， If welding slag is not cleaned properly, it can easily enter the inside of the battery cell, causing a short circuit and failure.

[0003] To address this, existing technologies typically utilize negative pressure dust removal devices to remove foreign objects such as welding slag. However, there are still instances where welding slag is not removed and falls into the battery cell, leading to a short circuit and failure inside the cell. Utility Model Content

[0004] Therefore, it is necessary to provide a reliable battery cell welding collection device that can collect welding slag and prevent it from falling into the battery cell.

[0005] This application provides a battery cell welding and collection device, including a welding apparatus positioned above the battery cell. The welding apparatus includes a first driving mechanism and a welding assembly for welding a first position on the battery cell to be welded. The welding assembly includes a welding nozzle, which moves vertically towards or away from the first position under the drive of the first driving mechanism. A slag receiving mechanism includes a slag receiving box for receiving slag falling from the welding nozzle. The slag receiving box can be positioned above the battery cell. When the welding nozzle is in an upward movement away from the first position, the slag receiving box is in a first state located between the first position and the welding nozzle.

[0006] In one embodiment, the slag receiving box also has a second state located next to the welding nozzle. The slag receiving mechanism further includes a second drive mechanism for switching the slag receiving box back and forth between the first state and the second state. The power output end of the second drive mechanism is connected to the slag receiving box. When the welding nozzle moves downward to a position close to the first position, the slag receiving box is in the second state.

[0007] In one embodiment, the slag receiving box moves along a first direction, which is a lateral direction perpendicular to the vertical direction.

[0008] In one embodiment, the second driving mechanism is a cylinder, the output end of which moves along the first direction, and the slag receiving box is connected to the output end of the cylinder.

[0009] In one embodiment, the slag receiving box includes a slag receiving plate for receiving welding slag, and the welding nozzle is positioned on the slag receiving plate along its vertical projection.

[0010] In one embodiment, the slag receiving box further includes a side plate extending upward from the periphery of the slag receiving plate, at least a portion of the side plate extending upward to form an extension plate, the extension plate being connected to the power output end of the second drive mechanism.

[0011] In one embodiment, the welding assembly further includes a mounting base and a laser located above the welding nozzle. The welding nozzle is provided with a laser welding aperture. Both the laser and the welding nozzle are located on the mounting base. The power output end of the first driving mechanism is drivenly connected to the mounting base.

[0012] In one embodiment, a platform is provided above the battery cell, and the slag receiving mechanism and at least part of the welding device are located above the platform and are connected to the platform.

[0013] In one embodiment, the welding apparatus further includes a slag suction channel for removing welding slag from the welding nozzle, the slag suction channel being connected to the welding nozzle.

[0014] In one embodiment, the battery cell includes a tab and a cover plate post, wherein the first position is the connection between the tab and the cover plate post.

[0015] Compared with existing technologies, the battery cell welding collection device provided in this application allows the welding nozzle to move upwards to a position away from the battery cell after welding at the first position is completed. The slag collection box is located between the first position and the welding nozzle. This means there is no need to move the welding nozzle laterally, thus avoiding the cleaning difficulties caused by falling welding slag. Therefore, after welding, the welding slag falling from the welding nozzle 121 can reliably and directly fall into the slag collection box, preventing it from falling at the first position and isolating the battery cell. This avoids short-circuit failure caused by welding slag falling at the first position, effectively protecting the battery cell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a battery cell welding and collection device according to an embodiment of this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure without the platform;

[0019] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0020] Reference numerals: 1. Welding device; 11. First drive mechanism; 12. Welding assembly; 121. Welding nozzle; 122. Mounting base; 123. Laser; 13. Slag suction channel; 2. Slag receiving mechanism; 21. Slag receiving box; 211. Slag receiving plate; 212. Side plate; 213. Extension plate; 22. Cylinder; 3. Platform; 4. Battery cell. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0027] See Figures 1-3 As shown, this application discloses a battery cell welding and collection device. The device includes a welding unit 1 and a slag collection mechanism 2. The welding unit 1 is positioned above the battery cell 4. The welding unit 1 includes a first driving mechanism 11 and a welding assembly 12. The welding assembly 12 is used to weld a first pre-welded position on the battery cell 4. The welding assembly 12 includes a welding nozzle 121, which, driven by the first driving mechanism 11, can move in the vertical direction towards or away from the first position.

[0028] The aforementioned slag receiving mechanism 2 includes a slag receiving box 21 for receiving slag falling from the welding nozzle 121. The slag receiving box 21 can be located above the battery cell 4. When the welding nozzle 121 is in a first position that moves upward away from the battery cell 4, the slag receiving box 21 is in a first state that is located between the first position and the welding nozzle 121.

[0029] Understandably, after welding at the first position is completed, the welding nozzle 121 can move upwards to a position away from the battery cell 4. The slag collection box 21 is located between the first position and the welding nozzle 121. In other words, it is only necessary to keep the slag collection box 21 in the first state; there is no need to move the welding nozzle laterally, thus avoiding the cleaning difficulties caused by falling welding slag. Therefore, after welding is completed, the welding slag falling from the welding nozzle 121 can fall directly and reliably into the slag collection box 21, preventing the welding slag from falling at the first position and isolating the battery cell 4. This avoids the problem of short circuit failure of the battery cell 4 caused by welding slag falling at the first position, and the battery cell 4 can be effectively protected.

[0030] like Figure 1 and Figure 2 As shown, the power output end of the first drive mechanism 11 is connected to the welding nozzle 121. Thus, the first drive mechanism 11 can drive the welding nozzle 121 to move up and down. When welding is required at the first position, the first drive mechanism 11 drives the welding nozzle 121 downwards to the first position to perform welding. After welding at the first position is completed, the first drive mechanism 11 drives the welding nozzle 121 upwards to a position away from the first position, avoiding interference with the handling of the battery cell 4.

[0031] The first drive mechanism 11 described above can be in the form of a cylinder 22, a push rod motor, or other methods, which will not be described in detail in this embodiment.

[0032] In this embodiment, such as Figures 1-3 As shown, the welding apparatus 1 also includes a slag suction channel 13 for removing welding slag from the welding nozzle 121, and the slag suction channel 13 is connected to the welding nozzle 121. It can be understood that the slag suction channel 13 can remove the welding slag from the welding nozzle 121, and the welding slag that is not removed will fall off and be received by the slag receiving box 21, which better prevents the welding slag from entering the battery cell.

[0033] The aforementioned slag suction channel 13 is connected to the dust collection device, and under the suction action of the dust collection device, the welding slag on the aforementioned welding nozzle 121 is sucked away.

[0034] In this embodiment, the welding device 1 is a laser welding mechanism. For example... Figures 1-3As shown, the welding assembly 12 also includes a mounting base 122 and a laser 123. Specifically, the laser 123 is located above the welding nozzle 121, which has a laser welding aperture. Both the laser 123 and the welding nozzle 121 are mounted on the mounting base 122. The power output end of the first drive mechanism 11 is connected to the mounting base 122, thereby driving the welding nozzle 121 and the laser 123 to move up and down synchronously. This facilitates welding at the first position. The principle and specific structure of laser welding can adopt any existing structure, which will not be described in detail in this embodiment. In other embodiments, welding methods other than laser welding can also be used. The slag suction channel 13 is connected to the laser aperture.

[0035] like Figure 1 As shown, the welding device 1 also includes a mounting base 122, on which the laser 123 and the welding nozzle 121 are both mounted. The power output end of the first drive mechanism 11 is connected to the mounting base 122, thereby driving the welding nozzle 121 and the laser 123 to move up and down synchronously.

[0036] In this embodiment, the slag receiving mechanism 2 is located above the battery cell 4. The slag receiving box 21 of the slag receiving mechanism 2 has a second state located next to the welding nozzle 121. The slag receiving mechanism 2 also includes a second driving mechanism for driving the slag receiving box 21 to switch back and forth between the first state and the second state. The power output end of the second driving mechanism is drivenly connected to the slag receiving box 21. When the welding nozzle 121 moves downward to a position close to the first position, the slag receiving box 21 is in the second state.

[0037] Understandably, when the welding device 1 performs welding work (i.e., starts welding), the welding nozzle 121 moves downward to the first position. At this time, the slag receiving box 21 can reliably move to the side of the welding nozzle 121 under the drive of the second drive mechanism, thereby avoiding interference with the normal welding work of the welding nozzle 121. Furthermore, by integrating the slag receiving mechanism 2 onto the welding device 1, the entire welding and slag receiving process becomes convenient and efficient.

[0038] In this embodiment, the battery cell 4 includes a tab and a cover plate terminal, with the first position being the connection point between the tab and the cover plate terminal. In other embodiments, the first position may also be any second position on the battery cell 4 that requires soldering.

[0039] In other embodiments, the slag receiving box 21 can rotate under the drive of the second drive mechanism to a position between the first position and the welding nozzle 121. In this embodiment, the slag receiving box 21 moves along a first direction, which is a transverse direction perpendicular to the vertical direction. The aforementioned vertical direction is the Z-axis direction. Schematic, the first direction is either the Y-axis direction or the X-axis direction. In this embodiment, the first direction is the Y-axis direction.

[0040] In other embodiments, the second drive mechanism is a push rod motor, or a combination of a motor, a lead screw, and a nut. Specifically, the output shaft of the motor is connected to the lead screw, the lead screw is threadedly connected to the nut, and the nut is connected to the slag receiving box 21. In this embodiment, the second drive mechanism is a cylinder 22, the output end of which moves along a first direction, and the slag receiving box 21 is connected to the output end of the cylinder 22.

[0041] In this embodiment, the slag receiving box 21 includes a slag receiving plate 211 for receiving welding slag, and the welding nozzle 121 is projected onto the slag receiving plate 211 along the vertical direction. In this way, the welding slag falling through the welding nozzle 121 can reliably fall onto the slag receiving plate 211, avoiding the situation where the welding slag falls outside the slag receiving plate 211.

[0042] Furthermore, the aforementioned slag receiving box 21 also includes a side plate 212 extending upward from the periphery of the slag receiving plate 211. At least a portion of the side plate 212 extends upward to form an extension plate 213, which is connected to the power output end of the second drive mechanism. In this way, the welding slag falling through the welding nozzle 121 can reliably fall into the cavity formed by the slag receiving plate 211 and the side plate 212, further preventing the welding slag from falling outside the slag receiving box 21. In this embodiment, the extension plate 213 is disposed on the side plate 212 near the second drive mechanism.

[0043] In this embodiment, a platform 3 is provided above the battery cell 4. The slag receiving mechanism 2 and at least part of the welding device 1 are both located above the platform 3 and are connected to the platform 3. It can be understood that the presence of the platform 3 facilitates the installation of the slag receiving mechanism 2 and isolates the battery cell 4 from the slag receiving mechanism 2.

[0044] The working process of the above-mentioned battery cell welding and collection equipment is as follows:

[0045] Welding begins. The welding nozzle 121 moves downwards along the Z-axis (vertical direction) under the drive of the first drive mechanism 11, while the slag collection box retracts along the Y-axis under the drive of the cylinder 22, without affecting normal welding. Subsequently, the welding nozzle 121 continues to move downwards along the Z-axis under the drive of the first drive mechanism 11, engaging with the tab of the battery cell 4 for laser welding. After laser welding is completed, the welding nozzle 121 moves upwards along the Z-axis under the drive of the first drive mechanism 11. Then, the slag collection box extends along the Y-axis under the drive of the cylinder 22 to a position directly below the welding nozzle 121, isolating the battery cell 4 and collecting the slag that falls from the welding nozzle 121. The welding nozzle 121 stops after continuing to move upwards along the Z-axis to its stop position under the drive of the first drive mechanism 11.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A battery cell welding and collection device, characterized in that, include: A welding device (1) is used to be positioned above a battery cell (4). The welding device (1) includes a first driving mechanism (11) and a welding assembly (12) for welding a first position of the battery cell (4) to be welded. The welding assembly (12) includes a welding nozzle (121), which moves in the vertical direction toward or away from the first position under the drive of the first driving mechanism (11). The slag receiving mechanism (2) includes a slag receiving box (21) for receiving the slag falling from the welding nozzle (121). The slag receiving box (21) can be located above the battery cell (4). When the welding nozzle (121) is in a state where it is moving upward away from the first position, the slag receiving box (21) is in a first state between the first position and the welding nozzle (121).

2. The battery cell welding and collection device according to claim 1, characterized in that, The slag receiving box (21) also has a second state located next to the welding nozzle (121). The slag receiving mechanism (2) further includes a second drive mechanism for switching the slag receiving box (21) back and forth between the first state and the second state. The power output end of the second drive mechanism is connected to the slag receiving box (21). When the welding nozzle (121) moves downward to a position close to the first position, the slag receiving box (21) is in the second state.

3. The battery cell welding and collection device according to claim 2, characterized in that, The slag receiving box (21) moves along a first direction, which is a transverse direction perpendicular to the vertical direction.

4. The battery cell welding and collection device according to claim 3, characterized in that, The second driving mechanism is a cylinder (22), the output end of the cylinder (22) moves along the first direction, and the slag receiving box (21) is connected to the output end of the cylinder (22).

5. The battery cell welding and collection device according to claim 2, characterized in that, The slag receiving box (21) includes a slag receiving plate (211) for receiving welding slag, and the welding nozzle (121) is located on the slag receiving plate (211) along the vertical direction.

6. The cell welding and collection device according to claim 5, characterized in that, The slag receiving box (21) also includes a side plate (212) extending upward from the periphery of the slag receiving plate (211), at least a portion of the side plate (212) extending upward to form an extension plate (213), the extension plate (213) being connected to the power output end of the second drive mechanism.

7. The battery cell welding and collection device according to claim 1, characterized in that, The welding assembly (12) also includes a mounting base (122) and a laser (123) located above the welding nozzle (121). The welding nozzle (121) is provided with a laser welding aperture. The laser (123) and the welding nozzle (121) are both located on the mounting base (122). The power output end of the first driving mechanism (11) is drivenly connected to the mounting base (122).

8. The battery cell welding and collection device according to claim 1, characterized in that, A platform (3) is provided above the battery cell (4). The welding slag receiving mechanism (2) and at least part of the welding device (1) are located above the platform (3) and are connected to the platform (3).

9. The battery cell welding and collection device according to claim 1, characterized in that, The welding device (1) further includes a slag suction channel (13) for sucking away the welding slag on the welding nozzle (121), and the slag suction channel (13) is connected to the welding nozzle (121).

10. The battery cell welding and collection device according to any one of claims 1 to 9, characterized in that, The battery cell (4) includes a tab and a cover plate post, and the first position is the connection between the tab and the cover plate post.

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