Tab welding clamp

Abstract

The utility model discloses a tab welding fixture, which belongs to the technical field of battery manufacturing and comprises a positioning component and a limiting part. The positioning assembly is used for fixing a pole group and a pole lug, and a first positioning part and a second positioning part are arranged on the positioning assembly; and the limiting piece is arranged between the first positioning part and the second positioning part, and selectively acts on the first positioning part and the second positioning part, so that the tab moves to a first preset welding position or a second preset welding position along with the positioning assembly. The electrode lug welding clamp can be used for two times of ultrasonic welding of a soft package battery, the first preset welding position and the second preset welding position can be rapidly positioned in the two times of ultrasonic welding process, the electrode lug welding efficiency is improved, the consistency of the welding positions is guaranteed, operation is easy, and positioning precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a tab welding fixture. Background Art

[0002] In the process of manufacturing battery cells, a key step is to weld the tabs of the already stacked core packs, a process mainly achieved through ultrasonic welding technology. As the new energy vehicle market continues to expand, the performance requirements for power batteries are getting higher and higher. In order to meet the requirements of fast charging and discharging, existing batteries have to improve the overcurrent requirements of the internal structure of the battery, and increasing the welding area of ​​the tab ultrasonic welding is an important way to improve the overcurrent capacity. However, the welding range of the existing welding head is fixed. For this situation, most of them adopt the method of increasing the number of welding times, that is, increasing the tab welding area through two weldings.

[0003] At present, in the two welding processes, the welding of the pole group and the pole lug is mostly manually positioned. The process is as follows: after manually measuring the position of the pole lug with a ruler, the pole lug positioning block is fixed with screws to position the pole lug; after manually measuring the position of the pole group with a ruler, the pole group positioning block is fixed with screws to position the pole group; then the positive pole lug is placed in the pole lug positioning block, and the pole group is placed in the positive electrode welding tooling for the first ultrasonic welding. After the first welding is completed, the position is measured manually with a ruler and then the second ultrasonic welding is performed. After completion, the pole group is manually moved to the negative electrode ultrasonic welding waiting area, and then the negative pole lug is placed in the pole lug positioning block, and then the positive electrode welded pole group is placed in the negative electrode welding tooling for the same two ultrasonic weldings.

[0004] The existing methods have the following problems: 1. The two welding operations are difficult and the welding position accuracy cannot be guaranteed; 2. Manual measurement of the pole ear positioning and pole group positioning takes a long time, and the position accuracy cannot be guaranteed, resulting in poor consistency in the welding area and affecting the welding effect; 3. The technical requirements for operators are high and errors are very easy to occur. If new employees are replaced, they need to be trained for a long time before qualified products can be produced. At the same time, the demand for enterprises to develop various battery cells with different material systems is also increasing. Therefore, it is particularly important to design and develop a tooling that can simultaneously meet the requirements of high positioning accuracy, easy replacement, and reduced personnel factors. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a tab welding fixture, which is intended to solve the problems of long welding positioning time, low positioning accuracy and poor welding consistency in the two ultrasonic welding processes of the existing tabs. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A pole lug welding fixture comprises a positioning assembly and a limiting member; the positioning assembly is used to fix a pole group and a pole lug, and the positioning assembly is provided with a first positioning portion and a second positioning portion; the limiting member is arranged between the first positioning portion and the second positioning portion, and the limiting member selectively acts on the first positioning portion and the second positioning portion to enable the pole lug to move with the positioning assembly to a first preset welding position or a second preset welding position.

[0007] Furthermore, a limiting groove is provided on the positioning assembly, and the limiting groove has a first side surface and a second side surface that are relatively arranged; the first side surface is the first positioning portion, and the second side surface is the second positioning portion; the limiting member is located in the limiting groove and can abut against the first positioning portion or the second positioning portion.

[0008] Furthermore, the positioning assembly includes a pole lug positioning device and a pole group positioning device; the pole group positioning device is used to fix the pole group, and the pole lug positioning device is used to fix the pole lug.

[0009] Furthermore, the pole group positioning device includes a pole group positioning substrate; a first positioning member, a second positioning member and a third positioning member are provided on the pole group positioning substrate, the first positioning member and the second positioning member are used to abut and position the pole group in a first direction, and the third positioning member is used to abut and position the pole group in a second direction, and the first direction is perpendicular to the second direction; the second positioning member is adjustably connected to the pole group positioning substrate; the first positioning portion and the second positioning portion are arranged on the pole group positioning substrate.

[0010] Furthermore, the tab positioning device comprises a tab positioning substrate; the tab positioning substrate is provided with a tab positioning groove, and the tab positioning groove is used to position the tab in the first direction and the second direction; the tab positioning substrate and the pole group positioning substrate are detachably connected.

[0011] Furthermore, one of the tab positioning substrate and the pole group positioning substrate is provided with a threaded positioning hole, and the other is provided with a countersunk hole extending along the first direction, a bolt connects the countersunk hole and the threaded positioning hole, and the bolt and the countersunk hole can move relative to each other along the first direction.

[0012] Furthermore, it also includes a base plate; the positioning component is slidably arranged on the base plate, and the limiting member is installed on the base plate.

[0013] Furthermore, one of the positioning assembly and the base plate is provided with a guide groove, and the other is provided with a guide piece, and the guide groove is used to engage the guide piece to achieve sliding of the positioning assembly on the base plate.

[0014] Furthermore, the limiting groove is communicated with the guiding groove, and the guiding groove passes through the limiting groove; the limiting members include at least two, and the at least two limiting members are respectively arranged on both sides of the guiding member in the second direction.

[0015] Furthermore, an operating handle is provided on the positioning assembly, and the operating handle is used to push and pull the positioning assembly.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model provides a tab welding fixture, which can be used for two ultrasonic welding of soft-pack batteries. By setting a positioning component and a limiter, it is convenient to quickly locate the first preset welding position and the second preset welding position during the two ultrasonic welding processes, which not only increases the welding area of ​​the tab, but also improves the tab welding efficiency, ensures the consistency of the welding position, is simple to operate, and has high positioning accuracy.

[0018] 2. The utility model provides a tab welding fixture, which fixes the pole group and the tab during the welding process by arranging a pole group positioning device and a tab positioning device, thereby improving the welding tension and avoiding defects in the battery caused by vibration.

[0019] 3. The pole group positioning device provided by the utility model has an adjustable positioning position, which can be applied to pole groups of different specifications. At the same time, the pole tab positioning device is detachably connected to the pole group positioning device, which is convenient for replacing the pole tab positioning device to adapt to pole tabs of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a tab welding fixture provided by an embodiment of the utility model;

[0021] Figure 2 It is an exploded view of a tab welding fixture provided by an embodiment of the utility model;

[0022] Figure 3 It is a front view of a substrate in a pole group positioning device provided by an embodiment of the utility model;

[0023] Figure 4 It is a back view of the substrate in the pole group positioning device provided by the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the assembly of the pole group and the pole tab in the pole tab welding fixture;

[0025] In the accompanying drawings: 10-bottom plate, 11-limiting member, 12-guide member, 13-limiting member positioning hole, 14-guide member positioning hole, 15-welding machine fixing hole;

[0026] 20-pole group positioning substrate, 21-first positioning member, 22-second positioning member, 23-third positioning member, 24-limiting groove, 241-first side surface, 242-second side surface, 25-guide groove, 26-operating handle;

[0027] 30-ear positioning substrate, 31-ear positioning groove, 311-suction cup hole, 40-electrode group, 50-ear. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0029] Embodiment 1:

[0030] See attached Figures 1 to 5 . The utility model discloses a tab welding fixture, which can be used for two ultrasonic welding of soft-pack batteries, so as to facilitate the rapid positioning of the first preset welding position and the second preset welding position during the two ultrasonic welding processes, thereby improving the consistency of the welding positions. The tab welding fixture of this embodiment includes a positioning assembly and a stopper 11, and the positioning assembly is used to fix the pole group and the tab. The positioning assembly is provided with a first positioning portion and a second positioning portion, and the stopper 11 is arranged between the first positioning portion and the second positioning portion. The stopper 11 selectively acts on the first positioning portion and the second positioning portion so that the tab moves with the positioning assembly to the first preset welding position or the second preset welding position. Among them, when the stopper 11 abuts against the first positioning portion, the tab moves with the positioning assembly to the first preset welding position, that is, the ultrasonic welding head is aligned with the first preset welding position of the tab; when the stopper 11 abuts against the second positioning portion, the tab moves with the positioning assembly to the second preset welding position, that is, the ultrasonic welding head is aligned with the second preset welding position of the tab. The size of the gap between the stopper 11 and the first positioning portion and the second positioning portion can be specifically set according to actual conditions. The limiting member 11 can be a limiting bar, which can be fixedly arranged on the mounting platform. The first positioning portion and the second positioning portion can be realized in a variety of ways. For example, the first positioning portion and the second positioning portion are two blocks fixedly connected to the side wall of the positioning assembly, the two blocks are relatively parallel, the limiting member 11 is fitted between the two blocks, and the limiting member 11 can selectively act on one of the two blocks.

[0031] When performing ultrasonic welding twice, after the pole group and the pole ear are fixed by the positioning assembly, the positioning assembly is moved so that the first positioning part of the positioning assembly abuts against the limiting member 11, and the first welding is performed at this time; after the first welding is completed, the positioning assembly is moved again so that the second positioning part of the positioning assembly abuts against the limiting member 11, and the second welding is performed. The first positioning part, the second positioning part and the limiting member 11 cooperate to quickly locate the two welding positions.

[0032] Embodiment 2:

[0033] See attached Figures 1 to 5 . On the basis of the first embodiment, in the present embodiment, a limiting groove 24 is provided on the positioning assembly, and the limiting groove 24 has a first side surface 241 and a second side surface 242 which are arranged opposite to each other, wherein the first side surface 241 is a first positioning portion, the second side surface 242 is a second positioning portion, and the limiting member 11 is located in the limiting groove 24 and can abut against the first positioning portion or the second positioning portion. Preferably, the limiting groove 24 is a square groove, and the limiting member 11 is a square bar. When the limiting member 11 abuts against the first side surface 241 of the limiting groove 24, the ultrasonic welding head is aligned with the first preset welding position on the pole lug; when the limiting member 11 abuts against the second side surface 242 of the limiting groove 24, the ultrasonic welding head is aligned with the second preset welding position on the pole lug. By setting the limiting groove 24 and the limiting member 11, the welding area of ​​the pole lug is increased, and it is easy to realize the rapid switching of multiple welding, which is convenient for processing.

[0034] Embodiment three:

[0035] See attached Figures 1 to 5 On the basis of the second embodiment, the positioning assembly is used to fix the pole group and the pole lug. In this embodiment, specifically, the positioning assembly includes a pole lug positioning device and a pole group positioning device, wherein the pole group positioning device is used to fix the pole group, and the pole lug positioning device is used to fix the pole lug.

[0036] In this embodiment, the pole group positioning device includes a pole group positioning substrate 20, on which a first positioning member 21, a second positioning member 22 and a third positioning member 23 are respectively provided. The first positioning member 21 and the second positioning member 22 are used to abut and position the pole group in a first direction, and the third positioning member 23 is used to abut and position the pole group in a second direction. The first direction is perpendicular to the second direction. Figure 1 As shown, in this embodiment, the y direction is represented as the first direction, and the x direction is represented as the second direction. The pole group can be fixed by the first positioning member 21, the second positioning member 22 and the third positioning member 23. Among them, the third positioning member 23 can abut the pole group from one side or both sides of the pole group in the second direction. Preferably, the third positioning member 23 abuts the pole group from one side of the pole group in the second direction. In a possible implementation, the first positioning member 21 is a front baffle, the second positioning member 22 is a rear positioning block, and the third positioning member 23 is a side block, such as Figure 3 and Figure 4 As shown, the side block can be integrally formed with the pole group positioning substrate 20, and the front block and the rear positioning block can be fixedly connected to the pole group positioning substrate 20 by bolts. When the pole group is fixed to the pole group positioning device, the portion of the pole group welded to the pole ear extends out of the front block. In this embodiment, the limiting groove 24 is provided on the pole group positioning substrate 20. Specifically, the limiting groove 24 can be provided on the lower bottom surface of the pole group positioning substrate 20, and the limiting groove 24 can be a U-shaped groove.

[0037] In this embodiment, the second positioning member 22 is adjustably connected to the pole group positioning substrate 20, that is, the position of the second positioning member 22 relative to the pole group positioning substrate 20 is adjustable to accommodate pole groups of different specifications. In a possible implementation, a threaded hole is provided on the pole group positioning substrate 20, and a countersunk hole is provided on the second positioning member 22, and the countersunk hole and the threaded hole are connected by bolts. At the same time, the countersunk hole extends along the first direction and has a long length, so that the second positioning member 22 is fixedly connected to the pole group positioning substrate 20, but the two can also be fine-tuned along the first direction.

[0038] It can be understood that the present embodiment does not limit the setting positions of the threaded holes and the countersunk holes. The setting positions of the threaded holes and the countersunk holes are interchangeable. That is, a threaded hole can be set on the second positioning member 22, and a countersunk hole can be set on the pole group positioning substrate 20. Similarly, the second positioning member 22 can be fixedly connected to the pole group positioning substrate 20, and the two can also be fine-tuned along the first direction.

[0039] Embodiment 4:

[0040] See attached Figures 1 to 5 On the basis of the third embodiment, the tab positioning device is used to fix the tab. Figure 2 As shown, in this embodiment, the tab positioning device includes a tab positioning substrate 30, and the tab positioning substrate 30 is provided with a tab positioning groove 31, and the tab positioning groove 31 is used to position the tab in the first direction and the second direction. After the tab is placed in the tab positioning groove 31, the end of the tab extends out of the tab positioning groove 31 and is stacked with the pole group welding position. The size and position of the tab positioning groove 31 can be specifically set according to actual conditions. At the same time, in order to facilitate adapting to pole groups and tabs of different specifications, the tab positioning substrate 30 and the pole group positioning substrate 20 are detachably connected, which is convenient for replacing the tab positioning device.

[0041] Specifically, one of the tab positioning substrate 30 and the pole group positioning substrate 20 is provided with a threaded positioning hole, and the other is provided with a countersunk hole extending along the first direction, and a bolt is connected to the countersunk hole and the threaded positioning hole to achieve a fixed connection between the tab positioning substrate 30 and the pole group positioning substrate 20. Moreover, the bolt and the countersunk hole can move relative to each other along the first direction, so that the tab positioning substrate 30 and the pole group positioning substrate 20 are fixedly connected, but the two can also be fine-tuned along the first direction. Among them, a possible implementation method, such as Figure 2 As shown, the tab positioning substrate 30 has a transverse portion and a longitudinal portion, the transverse portion and the longitudinal portion are connected in an L shape, the tab positioning groove 31 is arranged on the transverse portion, and the longitudinal portion is provided with a countersunk hole extending along the first direction; the pole group positioning substrate 20 is provided with a threaded positioning hole, and the countersunk hole and the threaded positioning hole are connected by bolts to realize the fixed connection between the tab positioning substrate 30 and the pole group positioning substrate 20.

[0042] It can be understood that the present embodiment does not limit the setting positions of the threaded holes and the countersunk holes. The setting positions of the threaded holes and the countersunk holes are interchangeable. That is, a threaded positioning hole can be set on the longitudinal portion of the pole lug positioning substrate 30, and a countersunk hole extending along the first direction can be set on the pole group positioning substrate 20. Similarly, the pole lug positioning substrate 30 and the pole group positioning substrate 20 can be fixedly connected, and the two can also be fine-tuned along the first direction.

[0043] In this embodiment, the number of the tab positioning grooves 31 may be two, and the two tab positioning grooves 31 are symmetrically arranged in the second direction, such as Figure 1 and Figure 2 When welding the tabs of the soft-pack battery, the tabs include a positive tab and a negative tab, and the two tab positioning grooves 31 can be used to install the positive tab and the negative tab respectively, as shown in FIG. Figure 5 As shown, Figure 5 The schematic diagram is a diagram of assembling the electrode group 40 and two electrode tabs 50 in the electrode tab welding fixture. When welding the electrode tabs, a double welding head can also be used to achieve simultaneous welding of the positive and negative electrodes.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, a suction cup hole 311 may be provided in the tab positioning groove 31 to fix the tab, thereby increasing the welding tension and avoiding defects in the battery caused by vibration.

[0045] Embodiment five:

[0046] See attached Figures 1 to 5 On the basis of the fourth embodiment, in this embodiment, the tab welding fixture further includes a bottom plate 10, which can be used to install the stopper 11, and the entire tab welding fixture can be connected to the ultrasonic welding device through the bottom plate 10. The positioning assembly is slidably arranged on the bottom plate 10. Specifically, in this embodiment, one of the positioning assembly and the bottom plate 10 is provided with a guide groove 25, and the other is provided with a guide member 12. The guide groove 25 is used to engage the guide member 12 to realize the sliding of the positioning assembly on the bottom plate 10.

[0047] In this embodiment, if Figure 3 and Figure 4 As shown, the limiting groove 24 and the guide groove 25 are both arranged on the pole group positioning substrate 20, the limiting groove 24 is connected with the guide groove 25, and the guide groove 25 passes through the limiting groove 24; the limiting member 11 and the guide member 12 are both arranged on the bottom plate 10, and the limiting member 11 includes at least two, and the at least two limiting members 11 are respectively arranged on both sides of the guide member 12 in the second direction. Figure 2As shown, the bottom plate 10 may also be provided with a stopper locating hole 13, a guide locating hole 14 and a welding machine fixing hole 15, and the stopper locating hole 13, the guide locating hole 14 and the welding machine fixing hole 15 may all be countersunk holes. The stopper 11 and the guide 12 are both provided with threaded holes, and the bottom plate 10, the stopper 11 and the guide 12 may be connected by bolts.

[0048] It can be understood that the present embodiment does not limit the setting positions of the threaded holes and the countersunk holes. The setting positions of the threaded holes and the countersunk holes are interchangeable. That is, threaded holes can be set on the base plate 10, and countersunk holes can be set on the limit member 11 and the guide member 12. Similarly, the limit member 11 or the guide member 12 can be fixedly connected to the base plate 10. At the same time, the limit member 11 and the base plate 10 can also be fine-tuned along the first direction, or the guide member 12 and the base plate 10 can also be fine-tuned along the first direction.

[0049] In this embodiment, the electrode tab welding fixture further includes an operating handle 26, which facilitates personnel to push and pull the secondary welding. Preferably, the operating handle 26 is connected to the electrode group positioning device. For example, the operating handle 26 is a threaded rod, and the threaded rod is threadedly connected to the electrode group positioning substrate 20.

[0050] The two welding processes are:

[0051] a. Place the positive electrode ear into the positive electrode ear positioning groove 31;

[0052] b. Place the pole group into the pole group positioning device;

[0053] c. Pull the operating handle 26 to push the pole group positioning device to abut against the first positioning portion for the first welding;

[0054] d. Pull the operating handle 26 again to pull the pole group positioning device to abut against the second positioning portion for a second welding;

[0055] e. After welding is completed, place the electrode group into the negative electrode welding area;

[0056] f. Repeat steps ad to complete the welding of the negative electrode ear and proceed to the next step.

[0057] The positive electrode ear can also be placed in the positive electrode ear positioning groove, and the negative electrode ear can be placed in the negative electrode ear positioning groove, and a double welding head can be used to achieve simultaneous welding of the positive and negative electrodes.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0060] In the description of the present invention, "plurality" means two or more.

[0061] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0062] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tab welding fixture, characterized in that: The invention comprises a positioning assembly and a limiting member (11); the positioning assembly is used to fix the pole group and the pole lug, and the positioning assembly is provided with a first positioning portion and a second positioning portion; the limiting member (11) is arranged between the first positioning portion and the second positioning portion, and the limiting member (11) selectively acts on the first positioning portion and the second positioning portion so that the pole lug moves with the positioning assembly to a first preset welding position or a second preset welding position.

2. The tab welding fixture according to claim 1, characterized in that: The positioning assembly is provided with a limiting groove (24), and the limiting groove (24) has a first side surface (241) and a second side surface (242) which are arranged opposite to each other; the first side surface (241) is the first positioning portion, and the second side surface (242) is the second positioning portion; the limiting member (11) is located in the limiting groove (24) and can abut against the first positioning portion or the second positioning portion.

3. A tab welding fixture according to claim 1 or 2, characterized in that: The positioning assembly includes a pole lug positioning device and a pole group positioning device; the pole group positioning device is used to fix the pole group, and the pole lug positioning device is used to fix the pole lug.

4. The tab welding fixture according to claim 3, characterized in that: The pole group positioning device comprises a pole group positioning substrate (20); a first positioning member (21), a second positioning member (22) and a third positioning member (23) are provided on the pole group positioning substrate (20); the first positioning member (21) and the second positioning member (22) are used to abut and position the pole group in a first direction, and the third positioning member (23) is used to abut and position the pole group in a second direction, the first direction being perpendicular to the second direction; the second positioning member (22) is adjustably connected to the pole group positioning substrate (20); and the first positioning portion and the second positioning portion are arranged on the pole group positioning substrate (20).

5. The tab welding fixture according to claim 4, characterized in that: The tab positioning device comprises a tab positioning substrate (30); a tab positioning groove (31) is provided on the tab positioning substrate (30), and the tab positioning groove (31) is used to position the tab in the first direction and the second direction; the tab positioning substrate (30) and the pole group positioning substrate (20) are detachably connected.

6. The tab welding fixture according to claim 5, characterized in that: One of the tab positioning substrate (30) and the pole group positioning substrate (20) is provided with a threaded positioning hole, and the other is provided with a countersunk hole extending along the first direction; a bolt connects the countersunk hole and the threaded positioning hole, and the bolt and the countersunk hole can move relative to each other along the first direction.

7. The tab welding fixture according to claim 2, characterized in that: It also comprises a base plate (10); the positioning assembly is slidably arranged on the base plate (10), and the limiting member (11) is installed on the base plate.

8. The tab welding fixture according to claim 7, characterized in that: One of the positioning assembly and the base plate (10) is provided with a guide groove (25), and the other is provided with a guide member (12); the guide groove (25) is used to engage with the guide member (12) to achieve sliding of the positioning assembly on the base plate (10).

9. The tab welding fixture according to claim 8, characterized in that: The limiting groove (24) is communicated with the guiding groove (25), and the guiding groove (25) passes through the limiting groove (24); the limiting members (11) include at least two, and the at least two limiting members (11) are respectively arranged on both sides of the guiding member (12) in the second direction.

10. The tab welding fixture according to claim 1, characterized in that: The positioning assembly is also provided with an operating handle, and the operating handle is used to push and pull the positioning assembly.

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