Welding fixture and welding equipment

Abstract

The invention relates to the technical field of battery tool welding, in particular to a welding clamp which comprises a clamping mechanism capable of moving in the vertical direction relative to a base, an overall fixing mechanism is arranged in the bottom side area of the clamping mechanism, and an accurate positioning mechanism is arranged in the top side area of the clamping mechanism. The accurate positioning mechanism is used for positioning and pressing the whole battery tool after the whole fixing mechanism completes fixing, accurate positioning of a to-be-welded point is ensured, and the to-be-welded point is accurately positioned through the height difference and stroke priority design of the whole fixing mechanism and the accurate positioning mechanism. Sequential linkage of macroscopic pre-positioning of the whole battery tool and microcosmic correction of the electrode band is achieved, the deviation of the electrode band is effectively corrected through inclined plane guiding fit of the concave inclined plane block and the penetrating rod and the synergistic effect of the correction wheel and the positioning concave surface, pseudo soldering and welding spot dislocation are avoided, and the welding positioning precision and the quality stability are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of battery tooling welding technology, and in particular to a welding fixture and welding equipment. Background Technology

[0002] The safe connection of hundreds of components in a battery module is closely related to the performance and safety of the entire battery system. Various connection technologies have been used in battery manufacturing, and laser welding is considered the most promising connection method because it is easy to automate, has high precision, a small heat-affected zone, is a non-contact process, has high processing speed, and is easy to weld different metals. Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Due to its concentrated heat, fast welding speed, small heat-affected zone, small welding deformation, and ease of achieving high efficiency automation and integration, it is increasingly widely used in power battery manufacturing.

[0003] Laser welding has a relatively mature theoretical research foundation both domestically and internationally. With the rapid development of new energy vehicles, laser welding has also been gradually applied to industrial scenarios such as busbar electrode welding. However, the stability of equipment and welding quality for busbar laser welding are still inconsistent.

[0004] Existing laser welding methods typically employ a pressing mechanism on the laser generator side when welding electrode strips to busbars. During welding, the laser welding head moves downward, and the pressing mechanism presses the electrode strip onto the busbar surface for welding. However, this pressing welding method has the following technical drawbacks: if the electrode strip on the battery is misaligned, the pressing mechanism can only achieve vertical clamping and fixation, but cannot correct the horizontal orientation of the electrode strip. This results in the misaligned electrode strip being forcibly pressed into the wrong position, causing quality problems such as misaligned welds, incomplete welds, or insufficient weld strength. Furthermore, this method lacks a pre-positioning mechanism for the entire battery fixture, making the battery module prone to macroscopic displacement on the support base. This causes subsequent precise alignment of the electrode strips to lose its reference, affecting the consistency and stability of batch welding. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the aforementioned problem of inaccurate welding positioning, this invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a welding fixture and welding equipment.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a welding fixture, comprising: a base for supporting a battery fixture assembly; a clamping mechanism movable vertically relative to the base, wherein an integral fixing mechanism is provided on the bottom side of the clamping mechanism and a precision positioning mechanism is provided on the top side of the clamping mechanism; the integral fixing mechanism is used to first contact, fix and position the battery fixture assembly during the downward movement of the clamping mechanism; the precision positioning mechanism is used to perform positioning and clamping within the battery fixture assembly after the integral fixing mechanism has completed fixing, that is, to perform fine positioning and clamping of the component electrode strip and the top of the component busbar inside the battery fixture assembly to ensure precise positioning of the welding point; and a driving device for driving the clamping mechanism to move vertically; the integral fixing mechanism and the precision positioning mechanism have a height difference in the vertical direction, and the integral fixing mechanism has a greater stroke priority than the precision positioning mechanism to ensure sequential fixing during clamping.

[0009] As a preferred embodiment of the welding fixture of the present invention, the clamping mechanism includes a support plate installed on the side wall of the base, a movable slide plate slidably connected to the support plate, a spring component installed at the bottom of the movable slide plate, a pressure plate installed at the bottom of the spring component, a spring column installed at the top of the movable slide plate, and a custom-designed perforated plate installed at the top of the spring column.

[0010] As a preferred embodiment of the welding fixture described in this invention, when the customized perforated plate moves downward, it first drives the movable sliding plate to move vertically downward on the support plate. At this time, the lower half of the spring column drives the overall fixing mechanism to move, so that the overall fixing mechanism corrects the position of the battery fixture on the base.

[0011] As a preferred embodiment of the welding fixture of the present invention, the overall fixing mechanism includes an extension rod installed on the outer wall of the spring column, one end of the extension rod is connected to a movable connecting rod via a pin, a through rod is installed through the support plate, the through rod is located on the horizontal side of the base plate and is perpendicular to the side wall of the base plate, the other end of the movable connecting rod is movably connected to one end of the through rod, and a concave inclined block is installed on the outer wall of the base plate, the concave inclined block is located on one side of the end of the through rod.

[0012] As a preferred embodiment of the welding fixture of the present invention, the deepest part of the concave inclined block can perfectly fit with the through rod. When the through rod moves and presses against the inclined area of ​​the concave inclined block, it can trigger the concave inclined block to move and gradually fit into the through rod. Then, the position of the base plate can be corrected and locked by the through rod.

[0013] As a preferred embodiment of the welding fixture of the present invention, the precise positioning mechanism includes multiple sets of positioning pressure plates installed at the bottom of the customized perforated plate. The axis of the central hole of the positioning pressure plate is consistent with the axis of the hole in the customized perforated plate, and a spring is provided between the positioning pressure plate and the customized perforated plate.

[0014] In a preferred embodiment of the welding fixture of the present invention, the bottom of the positioning plate is provided with a positioning concave surface, the width of the positioning concave surface is consistent with the width of the electrode strip, and the positioning concave surface and the bottom of the positioning plate are transitioned by a guide slope.

[0015] As a preferred embodiment of the welding fixture of the present invention, the bottom of the positioning plate is equipped with a correction wheel, the end of the correction wheel is equipped with a shaft, a conveyor belt is wound on the shaft, the top of the positioning plate is equipped with a support rod, the outer wall of the support rod is movably connected to a slider, the top of the slider is equipped with an upper pressure rod, and one end of the conveyor belt is connected to the top of the slider after being turned by a steering wheel on the top side of the support rod.

[0016] In a preferred embodiment of the welding fixture of the present invention, the driving device includes a driving motor mounted on the outer wall of the base, a screw mounted on the output end of the driving motor, a connecting plate mounted on the output end of the screw, and the connecting plate being fixedly connected to the side wall of the customized perforated plate.

[0017] A welding device includes: a machine tool base; a laser welding mechanism; a dual-stroke mechanism for separately driving two sets of bases, so that while the battery fixture on one set of bases is being laser welded, the other set of bases can be prepared for loading, adopting a dual-station alternating loading form to save loading and unloading time; and a welding fixture, as described in any one of the claims, for fixing the battery fixture as a whole.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0019] I. By designing the height difference and stroke priority between the overall fixing mechanism and the precision positioning mechanism, the sequential linkage between the overall macroscopic pre-positioning of the battery tooling and the microscopic correction of the electrode strip is realized. By utilizing the inclined guide fit of the concave inclined block and the through rod, as well as the synergistic effect of the correction wheel and the positioning concave surface, the electrode strip offset is effectively corrected, avoiding false welding and weld point misalignment, and significantly improving the welding positioning accuracy and quality stability.

[0020] Second, the dual-stroke mechanism drives two sets of bases to work alternately, so that laser welding and loading / unloading preparation can be performed in parallel, eliminating the waiting time of traditional single-station welding. At the same time, the spring buffer system adaptively adjusts the clamping force, which greatly improves equipment utilization and batch production efficiency while ensuring positioning accuracy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a welding fixture.

[0023] Figure 2 This is a schematic diagram of the clamping mechanism of a welding fixture.

[0024] Figure 3 This is a schematic diagram of the overall fixing mechanism of a welding fixture.

[0025] Figure 4 This is a schematic diagram of a battery tooling for a welding fixture.

[0026] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0027] Figure 6 This is a schematic diagram of the electrode strip of a welding fixture.

[0028] Figure 7 This is a schematic diagram of a positioning pressure plate for a welding fixture.

[0029] Figure 8 This is a schematic diagram of a correction wheel for a welding fixture.

[0030] Figure 9 This is a schematic diagram of a conveyor belt for a welding fixture.

[0031] Figure 10 This is a schematic diagram of a welding equipment.

[0032] Reference numerals: 1. Battery fixture assembly; 11. Battery; 12. Electrode strip; 13. Busbar; 14. Base plate; 15. Battery placement hole; 2. Clamping mechanism; 21. Base; 22. Support plate; 23. Moving slide plate;

[0033] 24. Spring components; 25. Lower pressure plate; 26. Spring column; 27. Custom-made perforated plate; 3. Overall fixing mechanism;

[0034] 31. Extension rod; 32. Movable connecting rod; 33. Through rod; 34. Concave inclined block; 4. Precision positioning mechanism; 41. Positioning pressure plate; 411. Positioning concave surface; 412. Guide inclined surface; 42. Correction wheel; 43. Shaft; 44. Conveyor belt; 45. Support rod; 46. Slider; 47. Upper pressure rod; 5. Drive device; 51. Drive motor; 52. Screw; 53. Connecting plate; 6. Welding equipment; 61. Machine tool base; 62. Laser welding mechanism; 63. Double stroke mechanism. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0039] Reference Figures 1-9This is one embodiment of the present invention, which provides a welding fixture, including: a base 21 for supporting a battery tooling assembly 1; a clamping mechanism 2, which can move vertically relative to the base 21; an overall fixing mechanism 3 provided on the bottom side of the clamping mechanism 2; and a precision positioning mechanism 4 provided on the top side of the clamping mechanism 2. The overall fixing mechanism 3 is used to first contact, fix, and position the battery tooling assembly 1 during the downward movement of the clamping mechanism 2. The precision positioning mechanism 4 is used to position and press the battery tooling assembly 1 after the overall fixing mechanism 3 has completed fixing, that is, to perform fine positioning and pressing on the top of the component electrode strip 12 and the component busbar 13 inside the battery tooling assembly 1, to ensure... The welding point is precisely positioned; the driving device 5 is used to drive the clamping mechanism 2 to move vertically; the overall fixing mechanism 3 and the precise positioning mechanism 4 have a height difference in the vertical direction, and the overall fixing mechanism 3 has a greater stroke priority than the precise positioning mechanism 4 to ensure sequential fixing during clamping. The driving device 5 drives the clamping mechanism 2 to move vertically. When the clamping mechanism 2 moves vertically, it drives the overall fixing mechanism 3 to move, so that the overall fixing mechanism 3 can position the battery fixture 1 on the base 21. At this time, the continuous movement of the clamping mechanism 2 drives the precise positioning mechanism 4 to move, so that the electrode strip 12 of the battery fixture 1 is positioned on the busbar 13.

[0040] Specifically, the clamping mechanism 2 includes a support plate 22 installed on the side wall of the base 21. The support plate 22 is slidably connected to a movable slide plate 23. A spring member 24 is installed at the bottom of the movable slide plate 23. A pressure plate 25 is installed at the bottom of the spring member 24. A spring column 26 is installed at the top of the movable slide plate 23. A custom-made perforated plate 27 is installed at the top of the spring column 26. When the custom-made perforated plate 27 moves downward, it can drive the spring column 26, the movable slide plate 23 and the pressure plate 25 to move downward, so that the pressure plate 25 can apply pressure to the base plate 14 and prevent the base plate 14 from accidentally detaching due to external force.

[0041] Furthermore, when the customized perforated plate 27 moves downward, it first drives the movable sliding plate 23 to move vertically downward on the support plate 22. At this time, the lower half of the spring column 26 drives the overall fixing mechanism 3 to move, so that the overall fixing mechanism 3 corrects the position of the battery fixture 1 on the base 21. When the battery fixture 1 is positioned, the external force on its spring column 26 gradually increases (because the lower pressure plate 25 is also in contact with the base plate 14). At this time, the movement of the spring column 26 provides more movement clearance for the customized perforated plate 27. This movement clearance can drive the precision positioning mechanism 4 to work.

[0042] Furthermore, the overall fixing mechanism 3 includes an extension rod 31 installed on the outer wall of the spring column 26. One end of the extension rod 31 is connected to a movable connecting rod 32 via a pin. A through rod 33 is installed through the support plate 22. The through rod 33 is located on the horizontal side of the base plate 14 and is perpendicular to the side wall of the base plate 14. The other end of the movable connecting rod 32 is movably connected to one end of the through rod 33. A concave inclined block 34 is installed on the outer wall of the base plate 14. The concave inclined block 34 is located on one side of the end of the through rod 33. The extension rod 31 moves, which drives the through rod 33 to move through the movable connecting rod 32. At this time, the through rod 33 touches the concave inclined block 34 of the base plate 14. Guided by the inclined surface and groove of the extension rod 31 and the concave inclined block 34, the extension rod 31 is finally embedded in the concave inclined block 34 and fits into it.

[0043] Furthermore, the deepest part of the concave inclined block 34 can perfectly fit with the through rod 33. When the through rod 33 moves and presses the inclined area of ​​the concave inclined block 34, it can trigger the concave inclined block 34 to move and gradually fit into the through rod 33. Then, the position of the base plate 14 can be corrected and locked by the through rod 33. At this time, the battery fixture 1 on the top of the base plate 14 can be positioned, making the subsequent positioning of the electrode strip 12 more accurate.

[0044] Furthermore, the precision positioning mechanism 4 includes multiple sets of positioning pressure plates 41 installed at the bottom of the custom-made perforated plate 27. The axis of the central hole of the positioning pressure plate 41 is consistent with the axis of the hole in the custom-made perforated plate 27. A spring is provided between the positioning pressure plate 41 and the custom-made perforated plate 27. During laser welding, the laser beam passes through the holes of the positioning pressure plate 41 and the custom-made perforated plate 27 and contacts the electrode strip 12 and the busbar 13. During welding, the laser welding process no longer needs to be corrected because the welding positioning point will not change after the positioning work is completed.

[0045] Furthermore, a positioning concave surface 411 is provided at the bottom of the positioning plate 41. The width of the positioning concave surface 411 is consistent with the width of the electrode strip 12. The positioning concave surface 411 and the bottom of the positioning plate 41 are connected by a guide slope 412. The correction wheel 42 is laid on the guide slope 412 and the bottom horizontal surface of the positioning plate 41, so that the rotation of the correction wheel 42 can finally transport the electrode strip 12 into the positioning concave surface 411.

[0046] Furthermore, a correction wheel 42 is installed at the bottom of the positioning plate 41, and a shaft 43 is installed at the end of the correction wheel 42. A conveyor belt 44 is wound on the shaft 43. A support rod 45 is installed at the top of the positioning plate 41, and a slider 46 is movably connected through the outer wall of the support rod 45. An upper pressure rod 47 is installed at the top of the slider 46. One end of the conveyor belt 44 is turned by a steering wheel on the top side of the support rod 45 and connected to the top of the slider 46. When the electrode strip 12 is finally embedded in the positioning concave surface 411, and after the electrode strip is embedded in the positioning concave surface 411, its correction wheel 42... The bottom of 2 still does not contact the top of the busbar 13, that is, the height of the correction wheel 42 protruding from the bottom of the positioning plate 41 is less than the minimum distance between the positioning plate 41 and the busbar 13. A torsion spring is provided on the shaft 43. The torsion spring is used to rewind the conveyor belt 44, so that the shaft 43 can drive the correction wheel 42 to rotate during each positioning operation. The rotation direction of the correction wheel 42 is: the direction that can move the electrode belt 12 that is in contact with the bottom of the correction wheel 42 toward the positioning concave surface 411, thereby completing the positioning operation of multiple sets of electrode belts 12 simultaneously.

[0047] Furthermore, the drive device 5 includes a drive motor 51 mounted on the outer wall of the base 21. A screw 52 is mounted on the output end of the drive motor 51, and a connecting plate 53 is mounted on the output end of the screw 52. The connecting plate 53 is fixedly connected to the side wall of the custom-made perforated plate 27. The screw 52 and the connecting plate 53 are connected by a threaded transmission. The rotation limit function of the connecting plate 53 is completed by four sets of integral fixing mechanisms 3, so that the screw 52 can stably drive the custom-made perforated plate 27 to move vertically.

[0048] Operation process: During loading, first place the battery fixture 1 on top of the base 21, and place the welded battery 11 and electrode strip 12 into the battery placement hole 15 of the battery fixture 1, with the electrode strip 12 facing upwards towards the busbar 13. At this time, turn on the drive motor 51. The drive motor 51 drives the screw 52 to rotate, and the rotation of the screw 52 drives the connecting plate 53 to move. The movement of the connecting plate 53 drives the customized perforated plate 27 located on the top side of the battery fixture 1 to move downwards. During the movement of the customized perforated plate 27, the pressure plate 25 and the spring 24 are pressed down. When not in contact with the base plate 14, the custom-designed perforated plate 27 moves the extension rod 31 on one side of the spring column 26 downward. The movement of the extension rod 31 drives the through rod 33 to move via the movable connecting rod 32. At this time, the through rod 33 presses against the concave inclined block 34 of the base plate 14. Guided by the inclined surface and groove of the concave inclined block 34, the extension rod 31 is finally embedded into the concave inclined block 34 and fits. At this time, the battery fixture 1, which is placed on the top side of the base 21 and may be offset, can be positioned and locked by the contact of the extension rod 31. At this time, the lower pressure plate 25 gradually contacts the top of the top plate. The contact causes the lower pressure plate 25 to gradually apply downward pressure to the top plate, and as the downward pressure is applied, the force on the spring column 26 also gradually increases, causing the spring column 26 to begin to extend and retract. When the spring column 26 extends and retracts, the lower pressure plate 25 on the bottom side of its customized perforated plate 27 contacts the electrode strip 12. If the electrode strip 12 is offset during placement, the correction wheels 42 on both sides of the lower pressure plate 25 will inevitably contact the electrode strip 12. At this time, there is a relative displacement between the customized perforated plate 27 and the lower pressure plate 25, causing the upper pressure rod 47 fixedly connected to the bottom of the customized perforated plate 27 to drive the slider on the support rod 45. 46 moves downward, and the slider 46 moves, driving the conveyor belt 44 to move, so that the conveyor belt 44 wound on the shaft 43 is pulled upward. At this time, the conveyor belt 44 drives the shaft 43 and the correction wheel 42 to rotate, so that the correction wheels on both sides drive the electrode strip 12, so that the electrode strip 12 is finally embedded in the positioning concave surface 411. After the electrode strip 12 is embedded in the positioning concave surface 411, the bottom of its correction wheel 42 still does not contact the top of the busbar 13, thereby positioning the welding points of multiple sets of electrode strips 12 and busbar 13, effectively improving the welding quality of the battery tooling as a whole 1.

[0049] Example 2

[0050] Reference Figure 10This is the second embodiment of the present invention, which differs from the first embodiment in that it includes a welding device 6, comprising: a machine tool base 61; a laser welding mechanism 62; a double-stroke mechanism 63 for separately driving two sets of bases 21, so that while the battery fixture 1 on one set of bases 21 is being laser welded, the other set of bases 21 can also be prepared for loading, adopting a dual-station alternating loading form to save loading and unloading time; a welding fixture for fixing the battery fixture 1; the double-stroke mechanism 63 drives the two sets of bases 21 to move, and welding fixtures are provided on both sets of bases 21. When one set of bases 21 is being laser welded, the other set of bases 21 is located on the outside and can be used for loading and unloading, thereby utilizing the laser welding time difference to complete the loading and unloading work and improve the subsequent welding efficiency.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding fixture, characterized in that: include, The base (21) is used to support the battery tooling assembly (1); The clamping mechanism (2) can move vertically relative to the base (21). The bottom area of ​​the clamping mechanism (2) is provided with an integral fixing mechanism (3), and the top area of ​​the clamping mechanism (2) is provided with a precision positioning mechanism (4). The integral fixing mechanism (3) is used to first contact, fix and position the battery tooling assembly (1) during the downward movement of the clamping mechanism (2). The precision positioning mechanism (4) is used to position and press the battery tooling assembly (1) after the integral fixing mechanism (3) has been fixed. That is, to finely position and press the top of the component electrode strip (12) and the component busbar (13) inside the battery tooling assembly (1) to ensure precise positioning of the welding point. A driving device (5) is used to drive the clamping mechanism (2) to move vertically; The overall fixing mechanism (3) and the precise positioning mechanism (4) have a height difference in the vertical direction, and the overall fixing mechanism (3) has a greater stroke priority than the precise positioning mechanism (4) to ensure sequential fixing during clamping.

2. The welding fixture as described in claim 1, characterized in that: The clamping mechanism (2) includes a support plate (22) installed on the side wall of the base (21). The support plate (22) is slidably connected to a movable slide plate (23). A spring element (24) is installed at the bottom of the movable slide plate (23). A pressure plate (25) is installed at the bottom of the spring element (24). A spring column (26) is installed at the top of the movable slide plate (23). A custom perforated plate (27) is installed at the top of the spring column (26).

3. The welding fixture as described in claim 2, characterized in that: When the customized perforated plate (27) moves down, it first drives the movable sliding plate (23) to move vertically down on the support plate (22). At this time, the lower half of the spring column (26) drives the overall fixing mechanism (3) to move, so that the overall fixing mechanism (3) corrects the position of the battery tooling assembly (1) on the base (21).

4. The welding fixture as described in claim 3, characterized in that: The overall fixing mechanism (3) includes an extension rod (31) installed on the outer wall of the spring column (26). One end of the extension rod (31) is connected to a movable connecting rod (32) via a pin. A through rod (33) is installed through the support plate (22). The through rod (33) is located on the horizontal side of the base plate (14) and is perpendicular to the side wall of the base plate (14). The other end of the movable connecting rod (32) is movably connected to one end of the through rod (33). A concave inclined block (34) is installed on the outer wall of the base plate (14). The concave inclined block (34) is located on one side of the end of the through rod (33).

5. The welding fixture as described in claim 4, characterized in that: The deepest part of the concave inclined block (34) can perfectly fit with the through rod (33). When the through rod (33) moves and presses the inclined area of ​​the concave inclined block (34), it can trigger the concave inclined block (34) to move and gradually fit into the through rod (33). Then, the position of the base plate (14) can be corrected and locked by the through rod (33).

6. The welding fixture as described in claim 5, characterized in that: The precise positioning mechanism (4) includes multiple sets of positioning pressure plates (41) installed at the bottom of the custom hole plate (27). The axis of the central hole of the positioning pressure plate (41) is consistent with the axis of the hole of the custom hole plate (27), and a spring is provided between the positioning pressure plate (41) and the custom hole plate (27).

7. The welding fixture as described in claim 6, characterized in that: The bottom of the positioning plate (41) is provided with a positioning concave surface (411), the width of the positioning concave surface (411) is consistent with the width of the electrode strip (12), and the positioning concave surface (411) and the bottom of the positioning plate (41) are connected by a guide slope (412).

8. The welding fixture as described in claim 7, characterized in that: The bottom of the positioning plate (41) is equipped with a correction wheel (42), the end of the correction wheel (42) is equipped with a shaft (43), a conveyor belt (44) is wound on the shaft (43), a support rod (45) is installed on the top of the positioning plate (41), a slider (46) is movably connected through the outer wall of the support rod (45), an upper pressure rod (47) is installed on the top of the slider (46), and one end of the conveyor belt (44) is connected to the top of the slider (46) after being turned by the steering wheel on the top side of the support rod (45).

9. The welding fixture as described in claim 8, characterized in that: The drive device (5) includes a drive motor (51) installed on the outer wall of the base (21), a screw (52) is installed at the output end of the drive motor (51), a connecting plate (53) is installed at the output end of the screw (52), and the connecting plate (53) is fixedly connected to the side wall of the custom perforated plate (27).

10. A welding device, characterized in that, The welding equipment (6) includes: Machine tool base (61); Laser welding mechanism (62); The dual-stroke mechanism (63) is used to drive the two sets of bases (21) separately, so that while the battery tooling assembly (1) above one set of bases (21) is laser welded, the other set of bases (21) can be prepared for loading. The dual-station alternating loading form saves loading and unloading time. The welding fixture is the welding fixture described in any one of claims 1-9, used to fix the battery tooling assembly (1).

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