Welding fixtures, electrode welding equipment and battery production systems

Abstract

This application provides a welding fixture, tab welding equipment, and battery production system. The welding fixture includes a limiting component and a positioning component. The limiting component includes a base and a limiting component. The limiting component is connected to the periphery of the base. Along a first direction, the limiting component protrudes from the base and surrounds the base to form a receiving groove. The positioning component is disposed on one side of the limiting component along a second direction and is movably connected to the limiting component along the second direction. Along the first direction, the positioning component protrudes from the base towards the limiting component. The positioning component has a welding channel. The first direction intersects with the second direction. This application facilitates flexible adjustment of the welding stamp position.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a welding fixture, tab welding equipment, and battery production system. Background Technology

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the production process of battery cells, tab welding equipment is often used to weld the tabs of multiple electrode components together. During the welding process, welding fixtures are used to position the electrode components. However, the welding fixtures in related technologies cannot flexibly adjust the welding position according to the tabs of different sizes. Utility Model Content

[0004] In view of the above problems, this application provides a welding fixture, tab welding equipment and battery production system, which is conducive to flexibly changing the position of the solder mark.

[0005] In a first aspect, this application provides a welding fixture, comprising: a limiting component, including a base and a limiting member, wherein the limiting member is connected to the periphery of the base, and the limiting member protrudes from the base and surrounds the base to form a receiving groove along a first direction; and a positioning member, disposed on one side of the limiting component along a second direction, wherein the positioning member is movably connected to the limiting component along the second direction, and the positioning member protrudes from the base toward the limiting member along the first direction, wherein the positioning member is provided with a welding channel, and the first direction intersects with the second direction.

[0006] In some embodiments of the first aspect, before welding the tabs of the electrode assembly, the electrode assembly can be placed on a welding fixture, wherein the main body of the electrode assembly is disposed in a receiving groove, a limiting member can circumferentially limit the main body, the tabs of the electrode assembly can be disposed on a positioning member and cover the welding channel, so that the welding device can weld the tabs through the welding channel. By setting the positioning member to be movably connected to the limiting member along the second direction, the positioning member can adjust its relative position with the limiting member according to the tabs of different sizes, thereby adjusting the position of the welding channel, which is beneficial to flexibly change the welding position to adapt to the tabs of different sizes, and thus improves the versatility of the welding fixture.

[0007] In some embodiments, the limiting member includes a first limiting portion, and the first limiting portion is provided on the side of the base facing the positioning member along the second direction, and the positioning member is movably connected to the base and / or the first limiting portion.

[0008] In the above technical solution, the electrode tab can be disposed on the positioning member and the first limiting part. When the positioning member moves relative to the first limiting part in the second direction, it can not only change the position of the solder mark to adapt to electrode tabs of different sizes, but also the positioning member and the first limiting part can provide support for the electrode tab, making the positioning of the electrode tab more reliable and improving the stability of the electrode tab in the welding process, thus ensuring the accuracy of subsequent welding operations.

[0009] In some embodiments, along a first direction, the first limiting portion has a first supporting surface on the side away from the base, and the positioning member has a second supporting surface on the side away from the base, with the first supporting surface and the second supporting surface being coplanar.

[0010] By setting it in the above manner, the support effect of the positioning component and the first limiting part on the electrode tab can be better improved, so that the electrode tab can fit against the coplanar first support surface and second support surface, reducing the possibility of the electrode tab bending or tilting due to the height difference between the first support surface and the second support surface, and enabling the electrode tab to maintain a flat posture during the welding process.

[0011] In some embodiments, the first limiting portion is movably connected to the base along the second direction.

[0012] By setting it in this way, the size of the receiving groove in the second direction can be changed to accommodate body parts with different sizes in the second direction, which is beneficial to further improve the versatility of the welding fixture.

[0013] In some embodiments, the positioning member includes a first wall, a second wall, and a third wall. The first wall and the second wall are disposed opposite each other along a third direction, and the third wall is connected between the first wall and the second wall. The first wall, the second wall, and the third wall enclose a welding channel. Along a second direction, the welding channel is located between the third wall and the first limiting part. At least one of the first wall and the second wall is movably connected to the base and / or the first limiting part. The first direction, the second direction, and the third direction intersect each other.

[0014] In the above technical solution, the first wall, the second wall and the third wall enclose and form a welding channel. When the positioning member moves relative to the first limiting part in the second direction, the position of the weld can be flexibly changed by adjusting the position of the welding channel.

[0015] In some embodiments, the positioning member further includes a fourth wall, which is connected between the first wall and the second wall and is disposed opposite to the third wall along a second direction. The first wall, the second wall, the third wall and the fourth wall enclose a welding channel. Along the second direction, the fourth wall is located between the welding channel and the first limiting part. At least one of the first wall, the second wall and the fourth wall is movably connected to the base and / or the first limiting part.

[0016] In the above technical solution, the first wall, the second wall, the third wall and the fourth wall enclose and form a welding channel. When the positioning member moves relative to the first limiting part in the second direction, the position of the weld can be flexibly changed by adjusting the position of the welding channel.

[0017] In some embodiments, two positioning elements are provided, which are spaced apart along a third direction, and the first direction, the second direction, and the third direction intersect each other.

[0018] In the above technical solution, one of the two positioning components can be used to support the positive electrode tab and the other to support the negative electrode tab. The two positioning components can move relative to the limiting component to adapt to positive and negative electrodes of different sizes, which is conducive to further improving the versatility of the welding fixture.

[0019] In some embodiments, the limiting member further includes a second limiting portion, which is provided on the side of the base away from the positioning member along the second direction, and the second limiting portion is movably connected to the base along the second direction.

[0020] By setting it in this way, the size of the receiving groove in the second direction can be changed to accommodate body parts with different sizes in the second direction, which is beneficial to further improve the versatility of the welding fixture.

[0021] In some embodiments, the second limiting portion includes a first sub-part and a second sub-part spaced apart along a third direction. The first sub-part and the second sub-part are both movably connected to the base along a second direction, and the first direction, the second direction, and the third direction intersect each other.

[0022] This configuration allows the first and second sub-parts to move relative to the base, accommodating main body parts of different sizes, which helps to further improve the versatility of the welding fixture.

[0023] In some embodiments, the limiting member further includes a third limiting part, and the base is provided with a third limiting part on both sides along the third direction. The third limiting part is movably connected to the base along the third direction, and the first direction, the second direction and the third direction intersect each other.

[0024] By setting it in this way, the size of the receiving groove in the third direction can be changed to accommodate body parts with different sizes in the third direction, which helps to further improve the versatility of the welding fixture.

[0025] In some embodiments, at least one third limiting portion includes a third sub-part and a fourth sub-part spaced apart along a second direction, both of which are movably connected to the base along a third direction; and / or, the welding fixture further includes a lifting member connected to the third limiting portion.

[0026] This configuration allows the third and fourth sub-parts to move relative to the base to accommodate main body parts of different sizes, which improves the versatility of the welding fixture. Furthermore, operators can move the welding fixture using the lifting mechanism, enhancing its ease of use.

[0027] In some embodiments, the welding fixture further includes a detection element, the base having a mounting hole communicating with the receiving groove, the detection element being disposed in the mounting hole and configured to detect whether the receiving groove contains a workpiece to be welded.

[0028] In the above technical solution, by setting up a detection component, the welding fixture can automatically identify whether it has a workpiece to be welded, which facilitates the linkage control between the welding fixture and the welding device and improves the automation level of the electrode welding process.

[0029] Secondly, this application also provides a tab welding apparatus, including a welding fixture provided according to any embodiment of the first aspect.

[0030] Thirdly, this application also provides a battery production system, including tab welding equipment according to any embodiment of the second aspect.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application 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 the drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a welding fixture in some embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the structure of a welding fixture in some other embodiments of this application;

[0035] Figure 3 This is a partial structural schematic diagram of a welding fixture according to other embodiments of this application;

[0036] Figure 4 This is a partial structural schematic diagram of a welding fixture in some other embodiments of this application.

[0037] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0038] 100. Welding fixtures;

[0039] 1. Limiting component; 101. Receiving groove; 11. Base; 111. Mounting hole; 12. Limiting element; 121. First limiting part; 102. First supporting surface; 122. Second limiting part; 1221. First sub-part; 1222. Second sub-part; 123. Third limiting part; 1231. Third sub-part; 1232. Fourth sub-part;

[0040] 2. Positioning component; 201. Welding channel; 202. Second support surface; 21. First wall; 22. Second wall; 23. Third wall; 24. Fourth wall; 3. Lifting component; 4. Inspection component;

[0041] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] 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 pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0044] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0048] In this application, "multiple" means two or more (including two).

[0049] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0050] In the production process of battery cells, tab welding equipment is often used to weld the tabs of multiple electrode components together. During the welding process, welding fixtures are used to position the electrode components. However, the welding fixtures in related technologies cannot flexibly adjust the welding position according to the tabs of different sizes.

[0051] Based on the above-mentioned technical problems, this application provides a welding fixture, including a limiting component and a positioning component. The limiting component includes a base and a limiting component. The limiting component is connected to the periphery of the base. Along a first direction, the limiting component protrudes from the base and surrounds the base to form a receiving groove. The positioning component is disposed on one side of the limiting component along a second direction. The positioning component is movably connected to the limiting component along the second direction. Along the first direction, the side of the positioning component facing the limiting component protrudes from the base. The positioning component is provided with a welding channel. The first direction and the second direction intersect.

[0052] Before welding the tabs of the electrode assembly, the electrode assembly can be placed on a welding fixture. The main body of the electrode assembly is located in a receiving groove, and a limiting member can circumferentially limit the main body. The tabs of the electrode assembly can be set on a positioning member and cover the welding channel, allowing the welding device to weld the tabs through the welding channel. By setting the positioning member to be movably connected to the limiting member in a second direction, the positioning member can adjust its relative position to the limiting member according to the tabs of different sizes, thereby adjusting the position of the welding channel. This facilitates flexible changes in the welding position to adapt to tabs of different sizes, thus improving the versatility of the welding fixture.

[0053] Please refer to the following: Figures 1 to 4 According to an embodiment of this application, a welding fixture 100 is provided, including a limiting component 1 and a positioning component 2. The limiting component 1 includes a base 11 and a limiting component 12. The limiting component 12 is connected to the periphery of the base 11. Along the first direction X, the limiting component 12 protrudes from the base 11 and surrounds the base 11 to form a receiving groove 101. The positioning component 2 is disposed on one side of the limiting component 1 along the second direction Y. The positioning component 2 is movably connected to the limiting component 1 along the second direction Y. Along the first direction X, the side of the positioning component 2 facing the limiting component 12 protrudes from the base 11. The positioning component 2 is provided with a welding channel 201. The first direction X intersects with the second direction Y.

[0054] Welding fixture 100 refers to a device used to support and position electrode assemblies during the welding process of tabs on at least two electrode assemblies. The electrode assembly includes a connected main body and tabs, with the tabs comprising a positive tab and a negative tab spaced apart.

[0055] In this embodiment, the first direction X can be the height direction of the base 11, the second direction Y can be the width direction of the base 11, and the third direction Z can be the length direction of the base 11. When the electrode assembly is disposed on the welding fixture 100, the first direction X can be the thickness direction of the electrode assembly, the second direction Y can be the width direction of the electrode assembly, or the second direction Y can be the arrangement direction of the main body and the tab of the electrode assembly, and the third direction Z can be the length direction of the electrode assembly.

[0056] The base 11 is the main load-bearing component of the welding fixture 100, used to support the limiting member 12 and the positioning member 2. Before welding the electrode tabs, the main body of the electrode assembly is placed in the receiving groove 101 of the welding fixture 100. The base 11 is used to support the main body, the limiting member 12 is used to restrict the displacement of the main body, and the electrode tabs of the electrode assembly are placed on the positioning member 2 so that the electrode tabs can be welded later.

[0057] Specifically, at least two electrode assemblies can be stacked on the welding fixture 100 along the first direction X for welding. The main bodies of the at least two electrode assemblies are stacked in the receiving groove 101, and the tabs of the at least two electrode assemblies are stacked on the positioning member 2 and cover the welding channel 201, so that the welding device can weld the at least two tabs together through one end of the welding channel 201.

[0058] The positioning member 2 is movably connected to the limiting component 1 along the second direction Y. Specifically, along the second direction Y, the positioning member 2 can be movably connected to the limiting component 1 on the side away from the receiving groove 101, and the positioning member 2 can also be movably connected to the limiting component 1 on the side closer to the receiving groove 101, so as to change the position of the welding channel 201 relative to the receiving groove 101, thereby flexibly adjusting the welding position of the electrode tab and realizing the adaptation to the welding requirements of electrode tabs of different sizes.

[0059] In related technologies, the welding fixtures used to position the electrode tabs are fixed, which means that the position of the weld marks on the electrode tabs during subsequent welding is fixed. When encountering electrode tabs of different sizes, it is impossible to flexibly adjust the position of the weld marks on the electrode tabs, resulting in low versatility of the welding fixtures and making them unsuitable for electrode tabs of various sizes.

[0060] The embodiments of this application differ from those of the previous one. In this embodiment, the positioning member 2 can be moved relative to the limiting component 1 along the second direction Y, so that the positioning member 2 can adjust its relative position with the limiting component 1 according to the different sizes of the electrode tabs. This allows for adjustment of the position of the welding channel 201, which is beneficial for flexibly changing the welding position of the electrode tabs and thus flexibly changing the position of the weld mark formed on the electrode tabs to adapt to electrode tabs of different sizes. This, in turn, helps to improve the versatility of the welding fixture 100.

[0061] Furthermore, since the welding fixture 100 provided in this application embodiment can flexibly change the position of the welding channel 201 to change the welding position of the electrode tab, it can also reduce the development cost of the welding fixture 100. It is not necessary to replace a welding fixture that matches a certain electrode assembly, which is beneficial to reduce costs and also reduces the debugging time caused by replacing the welding fixture. Therefore, it is also beneficial to improve the welding efficiency of the electrode tab welding equipment using the welding fixture 100 provided in this application embodiment.

[0062] The welding fixture 100 provided in this application embodiment can be applied to electrode assemblies with an I-type folded tab structure. Since the height of the I-type folded tab is relatively low, this height can be understood as the dimension along the second direction Y when it is placed in the welding fixture 100. The positioning member 2 of the welding fixture 100 provided in this application embodiment can move relative to the limiting member 1 along the second direction Y, so that the welding channel 201 can move relative to the limiting member 1 along the second direction Y, thereby flexibly adjusting the welding position of the tab and adapting to the welding requirements of tabs with different heights.

[0063] Optionally, the positioning element 2 is movably connected to the limiting component 1 along the first direction X.

[0064] By setting it in the above manner, the positioning member 2 can move relative to the limiting component 1 along the first direction X, so as to change the size of the positioning member 2 relative to the base 11 in the first direction X, thereby making it suitable for welding operations of electrode tabs and the main body with different distances in the first direction X.

[0065] In the embodiments of this application, the movable connection method can be achieved by setting a movable connection structure, which may include a guide rail, a slider structure, a slide groove structure, a telescopic trunk / sleeve structure, a pneumatic or hydraulic structure.

[0066] For example, taking the positioning member 2 movably connected to the limiting component 1 along the second direction Y as an example, the positioning member 2 may be provided with a boss, and the limiting component 1 may be provided with a groove extending along the second direction Y. The boss can move within the groove along the second direction Y to form a sliding connection structure with a sliding groove structure; or, the positioning member 2 may be provided with a slider, and the limiting component 1 may be provided with a guide rail extending along the second direction Y. The slider can move relative to the guide rail along the second direction Y to form a sliding connection structure with a guide rail and a slider structure.

[0067] Optionally, the positioning element 2 is movably connected to the base 11 along the second direction Y.

[0068] Optionally, the positioning member 2 is movably connected to the limiting member 12 along the second direction Y.

[0069] In some embodiments, the limiting member 12 includes a first limiting portion 121. Along the second direction Y, the base 11 is provided with the first limiting portion 121 on the side facing the positioning member 2. The positioning member 2 is movably connected to the base 11 and / or the first limiting portion 121.

[0070] The first limiting part 121 is disposed around the side of the receiving groove 101 facing the positioning member 2 along the second direction Y. The first limiting part 121 protrudes from the base 11 along the first direction X. The first limiting part 121 can provide a limiting effect along the second direction Y for the main body disposed in the receiving groove 101, thereby reducing the possibility of the main body moving towards the positioning member 2 along the second direction Y, thereby reducing the possibility of displacement of the electrode connected to the main body, and thus improving the reliability of the welding fixture 100, so as to improve the accuracy of its welding position for welding the electrode.

[0071] The positioning member 2 and the first limiting part 121 are arranged adjacent to each other along the second direction Y. It can also be understood that along the second direction Y, the first limiting part 121 is located between the positioning member 2 and the receiving groove 101. When welding the tabs of the electrode assembly, the main body of the electrode assembly is set in the receiving groove 101, and the tabs can be set on the positioning member 2 and the first limiting part 121, so that both the positioning member 2 and the first limiting part 121 can provide support for the tabs, thereby making the positioning of the tabs more stable. When the positioning member 2 moves relative to the first limiting part 121 along the second direction Y, the two ends of the tabs along the second direction Y are supported by the positioning member 2 and the first limiting part 121 respectively. That is to say, the welding fixture 100 provided in this application embodiment can adjust the welding position of the tabs by moving the positioning member 2 to adapt to tabs of different sizes. In addition, during this adjustment process, the support effect of the tabs can be improved, which is conducive to improving the stability of the tabs during the welding process and providing a guarantee for the accuracy of subsequent welding operations.

[0072] Optionally, the positioning member 2 is movably connected to the first limiting part 121 along the second direction Y.

[0073] Optionally, the positioning member 2 is movably connected to the base 11 along the second direction Y, and is also movably connected to the first limiting part 121.

[0074] Optionally, the base 11 and the first limiting part 121 can be integrally formed, or they can be provided separately and connected as a whole.

[0075] Optionally, the first limiting part 121 is fixedly connected to the base 11.

[0076] Optionally, the first limiting part 121 can be a plate-like structure.

[0077] Please see Figures 1 to 4 In some embodiments, along the first direction X, the first limiting part 121 has a first support surface 102 on the side away from the base 11, and the positioning member 2 has a second support surface 202 on the side away from the base 11, and the first support surface 102 and the second support surface 202 are coplanar.

[0078] "Coplanar" means that the first support surface 102 and the second support surface 202 are located in the same extending plane. It can also be understood as the first support surface 102 and the second support surface 202 having the same height difference relative to the base 11. By setting it in this way, when positioning the electrode tab, it can be supported by the flat, stepless, and level first support surface 102 and second support surface 202, reducing the possibility of the electrode tab bending, warping, or wrinkling due to the height difference between the first support surface 102 and the second support surface 202. This allows the electrode tab to maintain a flat posture during the welding process, thereby improving the reliability of the welding fixture 100, which in turn improves the accuracy of subsequent electrode tab welding and the quality of the welded electrode tab.

[0079] Optionally, the first support surface 102 is perpendicular to the first direction X, and the second support surface 202 is perpendicular to the first direction X.

[0080] In some embodiments, the first limiting part 121 is movably connected to the base 11 along the first direction X, and the positioning member 2 is fixedly connected to the first limiting part 121 along the first direction X.

[0081] By setting it in the above manner, the first limiting part 121 and the positioning member 2 can move relative to the base 11 along the first direction X, so as to change the size of the first support surface 102 and the second support surface 202 relative to the base 11 in the first direction X, thereby making it suitable for welding operations of electrode tabs and the main body with different distances in the first direction X.

[0082] When the distance between the electrode tab and the main body changes in the first direction X, the first limiting part 121 can be driven to move relative to the base 11 in the first direction X, so as to drive the positioning part 2 fixedly connected thereto to move synchronously, thereby adjusting the height of the support area formed by the first support surface 102 and the second support surface 202 in the first direction X, so that when facing electrode assemblies of different sizes, the base 11 can provide complete and flat support for the main body. At the same time, the support area formed by the first support surface 102 and the second support surface 202 can also provide complete and flat support for the electrode tab, which is conducive to further improving the adaptability of the welding fixture 100 to electrode assemblies of different specifications and sizes, and also conducive to improving the flexibility of the welding fixture 100.

[0083] In some embodiments, the first limiting part 121 is movably connected to the base 11 along a direction, and the positioning member 2 is movably connected to the base 11 along a first direction X.

[0084] By setting it in the above manner, the first limiting part 121 and the positioning member 2 can move relative to the base 11 along the first direction X, so as to change the size of the first support surface 102 and the second support surface 202 relative to the base 11 in the first direction X. This makes it suitable for welding operations of electrode tabs with different distances between the electrode tab and the main body in the first direction X. When the distance between the electrode tab and the main body in the first direction X changes, the first limiting part 121 and the positioning member 2 can be driven to move relative to the base 11 along the first direction X, and the first support surface 102 and the second support surface 202 are coplanar after the movement.

[0085] like Figure 3 As shown, in some embodiments, the positioning member 2 includes a first wall 21, a second wall 22, and a third wall 23. The first wall 21 and the second wall 22 are arranged opposite each other along the third direction Z. The third wall 23 is connected between the first wall 21 and the second wall 22. The first wall 21, the second wall 22, and the third wall 23 enclose a welding channel 201. Along the second direction Y, the welding channel 201 is located between the third wall 23 and the first limiting part 121. At least one of the first wall 21 and the second wall 22 is movably connected to the base 11 and / or the first limiting part 121. The first direction X, the second direction Y, and the third direction Z intersect each other.

[0086] Along the first direction X, the side surface of the first wall 21 away from the base 11, the side surface of the second wall 22 away from the base 11, and the side surface of the third wall 23 away from the base 11 together form the first support surface 102.

[0087] By configuring the positioning member 2 with the above-described structure, when the positioning member 2 moves relative to the first limiting part 121 along the second direction Y, the position of the welding channel 201 can be adjusted to flexibly change the welding position of the electrode tab. At the same time, when the positioning member 2 moves away from the first limiting part 121 along the second direction Y, a gap will be generated between the positioning member 2 and the first limiting part 121 due to the change in relative position. This gap communicates with the welding channel 201 and can form a new channel for welding the electrode tab, thereby increasing the welding area of ​​the electrode tab and realizing the adjustability of the welding area. In the subsequent welding process, the welding area can be selected more flexibly, which is beneficial to further improve the versatility of the welding fixture 100. In addition, configuring the positioning member 2 with the above-described structure is also beneficial to save the material used to manufacture the positioning member 2, thereby reducing the manufacturing cost of the welding fixture 100.

[0088] Optionally, the first wall 21 is movably connected to the base 11 along the second direction Y, or the first wall 21 is movably connected to the first limiting part 121 along the second direction Y.

[0089] Optionally, the second wall 22 is movably connected to the base 11 along the second direction Y, or the second wall 22 is movably connected to the first limiting part 121 along the second direction Y.

[0090] Optionally, the first wall 21 and the second wall 22 are movably connected to the base 11 along the second direction Y, or the first wall 21 and the second wall 22 are movably connected to the first limiting part 121 along the second direction Y.

[0091] like Figure 4 As shown, in some embodiments, the positioning member 2 further includes a fourth wall 24, which is connected between the first wall 21 and the second wall 22 and is disposed opposite to the third wall 23 along the second direction Y. The first wall 21, the second wall 22, the third wall 23 and the fourth wall 24 enclose a welding channel 201. Along the second direction Y, the fourth wall 24 is located between the welding channel 201 and the first limiting part 121. At least one of the first wall 21, the second wall 22 and the fourth wall 24 is movably connected to the base 11 and / or the first limiting part 121.

[0092] Along the first direction X, the side surface of the first wall 21 away from the base 11, the side surface of the second wall 22 away from the base 11, the side surface of the third wall 23 away from the base 11, and the side surface of the fourth wall 24 away from the base 11 together constitute the first support surface 102.

[0093] Along the second direction Y, the welding channel 201 is located between the third wall 23 and the first limiting part 121, and the fourth wall 24 is located between the welding channel 201 and the first limiting part 121. That is, in the second direction Y, the third wall 23, the welding channel 201, the fourth wall 24 and the first limiting part 121 are arranged in sequence, and the first limiting part 121 is closer to the base receiving groove 101 than the third wall 23.

[0094] By setting the positioning member 2 to the above structure, when the positioning member 2 moves relative to the first limiting part 121 along the second direction Y, the position of the welding channel 201 can be adjusted to flexibly change the welding mark position of the electrode tab. At the same time, the first wall 21, the second wall 22, the third wall 23 and the fourth wall 24 can all provide support for the electrode tab, which is beneficial to increasing the area and distribution area of ​​the welding fixture 100 for positioning the electrode tab, thereby improving the stability of the electrode tab in the subsequent welding process.

[0095] Optionally, the fourth wall 24 is movably connected to the base 11 along the second direction Y, or the fourth wall 24 is movably connected to the first limiting part 121 along the second direction Y.

[0096] Optionally, the first wall 21, the third wall 23, and the fourth wall 24 are movably connected to the base 11 along the second direction Y, or the first wall 21, the third wall 23, and the fourth wall 24 are movably connected to the first limiting part 121 along the second direction Y.

[0097] In some embodiments, the first limiting portion 121 is movably connected to the base 11 along the second direction Y.

[0098] The first limiting part 121 can move relative to the base 11 along the second direction Y to adjust the size of the receiving groove 101 in the second direction Y, thereby adapting to the main body with different sizes in the second direction Y. This is beneficial to further improve the versatility of the welding fixture 100. Furthermore, by setting it in the above manner, the first limiting part 121 can better fit the main body to reliably limit the main body with different sizes, reducing the possibility of the main body shaking or shifting during the welding process. This also reduces the possibility of the electrode tab connected to the main body shaking or shifting during the welding process, thereby improving the stability and accuracy of electrode tab welding.

[0099] like Figure 1 As shown, in some embodiments, the positioning element 2 can be configured as one, and the positive and negative tabs of at least two electrode assemblies are supported on the same positioning element 2, so that the welding device can weld at least two positive tabs and at least two negative tabs through the welding channel 201 opened in this positioning element 2.

[0100] In some embodiments, the positioning member 2 is movably connected to the limiting component 1 along the third direction Z.

[0101] When the position of the electrode tab changes relative to the main body in the third direction Z, the above-mentioned setting can adapt to various specifications of electrode tabs to meet the welding requirements of different specifications of electrode tabs.

[0102] like Figure 2 As shown, in some embodiments, two positioning elements 2 are provided, and the two positioning elements 2 are spaced apart along the third direction Z, with the first direction X, the second direction Y and the third direction Z intersecting each other.

[0103] Both positioning elements 2 are movably connected to the limiting component 1 along the second direction Y. One of the two positioning elements 2 can be used to support the positive electrode tab and the other can be used to support the negative electrode tab, so as to position the two electrodes of the electrode assembly respectively. By setting it in this way, the two positioning elements 2 can move relative to the limiting component respectively to adapt to positive and negative electrodes of different specifications and sizes, which is conducive to further improving the versatility of the welding fixture 100.

[0104] Optionally, the two positioning elements 2 have the same shape; in the first direction X, the two positioning elements 2 have the same dimensions; in the second direction Y, the two positioning elements 2 have the same dimensions; and in the third direction Z, the two positioning elements 2 have the same dimensions.

[0105] In some embodiments, when the positioning member 2 is set as one, the size of the positioning member 2 in the third direction X can be equal to or slightly smaller than the size of the base 11, so that no matter how the position of the electrode tab relative to the main body changes along the third direction X, the positioning member 2 can play the role of supporting and positioning the electrode tab.

[0106] Optionally, when the positioning element 2 is set to one, the ratio of the size of the positioning element 2 to the size of the base 11 in the third direction X satisfies a ratio between 2 / 3 and 1.

[0107] Optionally, when there are two positioning elements 2, the ratio of the sum of the dimensions of the two positioning elements 2 to the dimensions of the base 11 is between 2 / 3 and 1.

[0108] Optionally, in the third direction X, the ratio of the size of the welding channel 201 to the size of the positioning member 2 is between 7 / 10 and 9 / 10, so that no matter how the position of the electrode tab relative to the main body changes along the third direction X, when the electrode tab is set on the positioning member 2, there is a welding channel 201 corresponding to the electrode tab in the first direction X, so as to meet the welding requirements of electrode tabs of different specifications and further improve the versatility of the welding fixture 100.

[0109] In some embodiments, the first limiting portion 121 includes a fifth sub-portion and a sixth sub-portion spaced apart along a third direction Z.

[0110] The fifth and sixth sub-parts are spaced apart along the third direction Z, forming a clearance space in between. This effectively avoids protrusions, steps, poles, or other irregular structures on the main body, reducing the possibility of insufficient limiting of the main body due to interference. This improves the adaptability of the welding fixture 100 to electrode assemblies with different structures. Furthermore, it reduces the material used for the first limiting part 121, thereby reducing the overall weight of the welding fixture 100.

[0111] Optionally, one of the positioning members 2 is disposed opposite to the fifth sub-part along the second direction Y. This can also be understood as the orthographic projection of one of the positioning members 2 along the second direction Y partially or completely overlaps with the orthographic projection of the fifth sub-part along the second direction Y. Optionally, another positioning member 2 is disposed opposite to the sixth sub-part along the second direction Y. This can also be understood as the orthographic projection of the other positioning member 2 along the second direction Y partially or completely overlaps with the orthographic projection of the sixth sub-part along the second direction Y.

[0112] Please see Figure 1 and Figure 2 In some embodiments, the limiting member 12 further includes a second limiting part 122. Along the second direction Y, the second limiting part 122 is provided on the side of the base 11 away from the positioning member 2. The second limiting part 122 is movably connected to the base 11 along the second direction Y.

[0113] The second limiting part 122 can move relative to the base 11 along the second direction Y to adjust the size of the receiving groove 101 in the second direction Y, thereby adapting to the main body with different sizes in the second direction Y. This is beneficial to further improve the versatility of the welding fixture 100. Furthermore, by setting it in the above manner, the second limiting part 122 can better fit the main body to reliably limit the main body with different sizes, reducing the possibility of the main body shaking or shifting during the welding process. This also reduces the possibility of the electrode tab connected to the main body shaking or shifting during the welding process, thereby improving the stability and accuracy of electrode tab welding.

[0114] In some embodiments, the first limiting part 121 and the second limiting part 122 are disposed opposite to each other along the second direction Y. The first limiting part 121 surrounds one side of the receiving groove 101 along the second direction Y, and the second limiting part 122 surrounds the other side of the receiving groove 101 along the second direction Y. Along the second direction Y, the first limiting part 121 is located between the positioning member 2 and the second limiting part 122.

[0115] The first limiting part 121 and the second limiting part 122 cooperate to clamp and limit the main body of the electrode assembly from both sides of the second direction Y, so that the main body is placed more firmly in the receiving groove 101 and the welding accuracy is further improved.

[0116] Optionally, in order to reduce manufacturing costs, the second limiting part 122 is movably connected to the base 11 along the second direction Y, and the first limiting part 121 is fixedly connected to the base 11. When facing a main body with different sizes in the second direction Y, it is only necessary to adjust the second limiting part 122 along the second direction Y.

[0117] Optionally, the first limiting part 121 is movably connected to the base 11 along the second direction Y, and the second limiting part 122 is movably connected to the base 11 along the second direction Y. By setting it in this way, the welding fixture 100 can have a higher redundancy. When one of the first limiting part 121 and the second limiting part 122 fails to move relative to the base 11, the other one can still move relative to the base 11 to fix the main body, which is beneficial to improving production efficiency.

[0118] In some embodiments, the second limiting portion 122 is movably connected to the base 11 along the first direction X.

[0119] The second limiting part 122 can move relative to the base 11 along the first direction X to adjust the size of the receiving groove 101 in the first direction X, thereby adapting to the main body with different sizes in the first direction X. This allows the second limiting part 122 to better fit the main body, reliably limiting the main body with different sizes and reducing the possibility of the main body shaking or shifting during the welding process. This also reduces the possibility of the electrode tab connected to the main body shaking or shifting during the welding process, which is beneficial to further improve the versatility of the welding fixture 100 and the stability and accuracy of electrode tab welding.

[0120] In some embodiments, the first limiting portion 121 is movably connected to the base 11 along the first direction X.

[0121] The first limiting part 121 can move relative to the base 11 along the first direction X to adjust the size of the receiving groove 101 in the first direction X, so as to adapt to the main body with different sizes in the first direction X, so that the first limiting part 121 can better fit the main body, so as to reliably limit the main body with different sizes, reduce the possibility of the main body shaking or shifting during the welding process, thereby reducing the possibility of the electrode tab connected to the main body shaking or shifting during the welding process, which is conducive to further improving the versatility of the welding fixture 100 and the stability and accuracy of electrode tab welding.

[0122] Please see Figure 1 and Figure 2 In some embodiments, the second limiting part 122 includes a first sub-part 1221 and a second sub-part 1222 spaced apart along the third direction Z. The first sub-part 1221 and the second sub-part 1222 are both movably connected to the base 11 along the second direction Y. The first direction X, the second direction Y and the third direction Z intersect each other.

[0123] This configuration allows the first sub-part 1221 and the second sub-part 1222 to move relative to the base 11 respectively, adapting to main body parts of different sizes, which helps to further improve the versatility of the welding fixture 100.

[0124] The first sub-part 1221 and the second sub-part 1222 are spaced apart along the third direction Z, forming a clearance space in between. This effectively avoids protrusions, steps, poles, or other irregular structures on the main body, reducing the possibility of insufficient limiting of the main body due to interference. This improves the adaptability of the welding fixture 100 to electrode assemblies with different structures. Furthermore, it reduces the material used for the second limiting part 122, thereby reducing the overall weight of the welding fixture 100.

[0125] Please see Figure 1 and Figure 2In some embodiments, the limiting member 12 further includes a third limiting part 123. The base 11 is provided with the third limiting part 123 on both sides along the third direction Z. The third limiting part 123 is movably connected to the base 11 along the third direction Z. The first direction X, the second direction Y and the third direction Z intersect each other.

[0126] The third limiting parts 123 on both sides of the base 11 along the third direction Z can be moved and adjusted respectively, which can clamp and position the main body of the electrode assembly from both sides of the third direction Z, ensuring that the main body does not shake, deviate or rotate in the third direction Z, thereby further improving the welding positioning accuracy and welding stability.

[0127] The third limiting part 123 can move relative to the base 11 along the third direction Z to adjust the size of the receiving groove 101 in the third direction Z, thereby adapting to the main body parts with different sizes in the third direction Z. This is beneficial to further improve the versatility of the welding fixture 100. Furthermore, by setting it in the above manner, the third positioning part can better fit the main body part to reliably limit the main body parts of different sizes, reducing the possibility of the main body part shaking or shifting during the welding process. This also reduces the possibility of the electrode tabs connected to the main body part shaking or shifting during the welding process, thereby improving the stability and accuracy of electrode tab welding.

[0128] Based on the second limiting part 122 being adjustable along the second direction Y, a third limiting part 123 being adjustable along the third direction Z is added. This works in conjunction with the movement adjustment of the positioning part 2 to form an all-round positioning adjustment structure, which can meet the limiting and welding requirements of electrode assemblies of different sizes and models, with more precise adjustment and stronger adaptability.

[0129] In some embodiments, at least one third limiting portion 123 includes a third sub-part 1231 and a fourth sub-part 1232 spaced apart along a second direction Y, and both the third sub-part 1231 and the fourth sub-part 1232 are movably connected to the base 11 along a third direction Z.

[0130] This configuration allows the third sub-part 1231 and the fourth sub-part 1232 to move relative to the base 11 to accommodate main body parts of different sizes, which helps to further improve the versatility of the welding fixture 100.

[0131] The third sub-part 1231 and the fourth sub-part 1232 are spaced apart along the second direction Y, forming a clearance space in between. This effectively avoids protrusions, steps, poles, or other irregular structures on the main body, reducing the possibility of insufficient limiting of the main body due to interference. This improves the adaptability of the welding fixture 100 to electrode assemblies with different structures. Furthermore, it reduces the material used for the third limiting part 123, thereby reducing the overall weight of the welding fixture 100.

[0132] Please see Figure 1 and Figure 2 In some embodiments, the welding fixture 100 further includes a lifting member 3, which is connected to the third limiting part 123.

[0133] The lifting component 3 provides a reliable gripping point for the operator, allowing the operator to lift, move, and place the welding fixture 100 through the lifting component 3. This improves the ease of use of the welding fixture 100 and reduces the possibility of structural deformation, positioning displacement, or contamination caused by direct contact between the operator and the limiting component 1 or the positioning component 2. This further improves the reliability of the welding fixture 100.

[0134] Optionally, each third limiting part 123 includes a third sub-part 1231 and a fourth sub-part 1232 spaced apart along the second direction Y. The base 11 is provided with lifting members 3 on both sides along the third direction Z. One end of the lifting member 3 is connected to the third sub-part 1231 and the other end is connected to the fourth sub-part 1232.

[0135] In some embodiments, the welding fixture 100 further includes a detection element 4. The base 11 is provided with a mounting hole 111 communicating with the receiving groove 101. The detection element 4 is provided in the mounting hole 111 and is configured to detect whether the receiving groove 101 is provided with a workpiece to be welded.

[0136] The detection element 4 can detect in real time whether there is an electrode assembly to be welded placed in the receiving tank 101. Optionally, the detection element 4 is communicatively connected to the welding device. When the main body of the electrode assembly is placed in the receiving tank 101, the detection element 4 sends a welding signal to the welding device. After receiving the welding signal, the welding device welds the electrode tab. When no electrode assembly is placed in the receiving tank 101, the detection element 4 can feed back a signal to control the electrode tab welding equipment not to start, effectively avoiding equipment damage, safety hazards or waste of good products caused by dry welding or mis-welding, ensuring that the welding action is only performed after the workpiece is in place, and improving welding reliability.

[0137] By setting the detection component 4, the welding fixture 100 can automatically identify whether there is a workpiece to be welded, which facilitates the linkage control between the welding fixture 100 and the welding device and improves the automation level of the electrode welding process.

[0138] The test piece 4 is installed in the mounting hole 111 on the base 11, which is connected to the receiving groove 101. It does not occupy the placement space of the main body, nor does it interfere with the positioning of the electrode assembly and welding operation of the welding fixture 100. The installation position is reasonable.

[0139] The feedback signal from the detection component 4 can be connected to the production line control system to achieve interlocking of the processes of feeding, positioning, welding, and unloading, thereby reducing manual intervention and misoperation and improving production efficiency and process stability.

[0140] According to some embodiments of this application, this application also provides a tab welding device, including the welding fixture 100 provided in any of the above embodiments.

[0141] The electrode welding equipment also includes a welding device. After the electrode assembly is placed in the welding fixture 100, the welding device welds the electrode through the welding channel 201. Optionally, the welding device is an ultrasonic welding device.

[0142] Because the welding fixture 100 provided in this application embodiment can flexibly change the welding position of the electrode tab by adjusting its own structure to be suitable for electrode assemblies of various sizes, it is beneficial to improve the welding efficiency of the electrode tab welding equipment using this welding fixture 100.

[0143] According to some embodiments of this application, this application also provides a battery production system, including the tab welding equipment provided in any of the above embodiments.

[0144] Because the tab welding equipment provided in this application embodiment is beneficial to improving the welding efficiency of the tabs, it is beneficial to improve the production efficiency of the battery production system including this tab welding equipment.

[0145] Please refer to the following: Figures 1 to 4 According to some embodiments of this application, this application provides a welding fixture 100, including a limiting component 1, a positioning component 2, a lifting component 3, and a detection component 4, wherein the first direction X is the height direction of the base 11, the second direction Y is the width direction of the base 11, and the third direction Z is the length direction of the base 11.

[0146] The limiting component 1 includes a base 11 and a limiting member 12. The base 11 has a mounting hole 111 communicating with the receiving groove 101. The detection member 4 is disposed in the mounting hole 111 and configured to detect whether the receiving groove 101 is provided with a part to be welded. The limiting member 12 is connected to the periphery of the base 11. The limiting member 12 protrudes from the base 11 along the first direction X. The limiting member 12 includes a first limiting part 121, a second limiting part 122, and a third limiting part 123. The first limiting part 121, the second limiting part 122, and the third limiting part 123, together with the base 11, form the receiving groove 101. The first limiting part 121 is provided on one side of the base 11 along the second direction Y, and the second limiting part 122 is provided on the other side. The third limiting part 123 and the lifting member 3 are respectively provided on both sides of the base 11 along the third direction Z. The second limiting part 122 includes a first sub-part 1221 and a second sub-part 1222 spaced apart along the third direction Z. Both the first sub-part 1221 and the second sub-part 1222 are movably connected to the base 11 along the second direction Y. The third limiting part 123 includes a third sub-part 1231 and a fourth sub-part 1232 spaced apart along the second direction Y. Both the third sub-part 1231 and the fourth sub-part 1232 are movably connected to the base 11 along the third direction Z. One end of the lifting member 3 is connected to the third sub-part 1231, and the other end is connected to the fourth sub-part 1232.

[0147] Positioning member 2 is disposed on one side of limiting component 1 along the second direction Y. Positioning member 2 is disposed on the side of first limiting part 121 away from limiting member 12 along the second direction Y. There are two positioning members 2. Both positioning members 2 are movably connected to base 11 and / or first limiting part 121 along the second direction Y. Each positioning member 2 is provided with welding channel 201. Along the first direction X, the side of positioning member 2 away from base 11 has a second support surface 202, and the side of first limiting part 121 away from base 11 has a first support surface 102. The first support surface 102 and the second support surface 202 are coplanar.

[0148] The positioning member 2 includes a first wall 21, a second wall 22, and a third wall 23. The first wall 21 and the second wall 22 are arranged opposite each other along the third direction Z. The third wall 23 is connected between the first wall 21 and the second wall 22. The first wall 21, the second wall 22, and the third wall 23 enclose a welding channel 201. Along the second direction Y, the welding channel 201 is located between the third wall 23 and the first limiting part 121. At least one of the first wall 21 and the second wall 22 is movably connected to the base 11 and / or the first limiting part 121. Alternatively, the positioning element 2 may further include a fourth wall 24, which is connected between the first wall 21 and the second wall 22 and is disposed opposite to the third wall 23 along the second direction Y. The first wall 21, the second wall 22, the third wall 23 and the fourth wall 24 enclose a welding channel 201. Along the second direction Y, the fourth wall 24 is located between the welding channel 201 and the first limiting part 121. At least one of the first wall 21, the second wall 22 and the fourth wall 24 is movably connected to the base 11 and / or the first limiting part 121.

[0149] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A welding fixture, characterized by, include: A limiting component includes a base and a limiting member, wherein the limiting member is connected to the periphery of the base, and along a first direction, the limiting member protrudes from the base and surrounds the base to form a receiving groove. A positioning element is disposed on one side of the limiting component along the second direction. The positioning element is movably connected to the limiting component along the second direction. Along the first direction, the side of the positioning element facing the limiting component protrudes from the base. The positioning element is provided with a welding channel. The first direction intersects with the second direction.

2. The welding fixture of claim 1, wherein, The limiting member includes a first limiting portion. Along the second direction, the first limiting portion is provided on the side of the base facing the positioning member. The positioning member is movably connected to the base and / or the first limiting portion.

3. The welding fixture of claim 2, wherein, Along the first direction, the first limiting part has a first supporting surface on the side away from the base, and the positioning member has a second supporting surface on the side away from the base, wherein the first supporting surface and the second supporting surface are coplanar.

4. The welding fixture of claim 2, wherein, The first limiting part is movably connected to the base along the second direction.

5. The welding fixture of claim 2, wherein, The positioning element includes a first wall, a second wall, and a third wall. The first wall and the second wall are arranged opposite each other along a third direction, and the third wall is connected between the first wall and the second wall. The first wall, the second wall, and the third wall together form the welding channel. Along the second direction, the welding channel is located between the third wall and the first limiting part, at least one of the first wall and the second wall is movably connected to the base and / or the first limiting part, and the first direction, the second direction and the third direction intersect each other.

6. The welding fixture according to claim 5, characterized in that, The positioning element further includes a fourth wall, which is connected between the first wall and the second wall and is disposed opposite to the third wall along the second direction. The first wall, the second wall, the third wall and the fourth wall together form the welding channel. Along the second direction, the fourth wall is located between the welding channel and the first limiting part, and at least one of the first wall, the second wall and the fourth wall is movably connected to the base and / or the first limiting part.

7. The welding fixture of any one of claims 1 to 4, wherein, The positioning element is configured as two, and the two positioning elements are spaced apart along a third direction, with the first direction, the second direction, and the third direction intersecting each other.

8. The welding fixture of any one of claims 1 to 4, wherein, The limiting member further includes a second limiting part. Along the second direction, the second limiting part is provided on the side of the base away from the positioning member, and the second limiting part is movably connected to the base along the second direction.

9. The welding fixture of claim 8, wherein, The second limiting part includes a first sub-part and a second sub-part spaced apart along a third direction. The first sub-part and the second sub-part are both movably connected to the base along the second direction. The first direction, the second direction, and the third direction intersect each other.

10. The welding fixture of any one of claims 1 to 4, wherein, The limiting member further includes a third limiting part, which is provided on both sides of the base along the third direction. The third limiting part is movably connected to the base along the third direction, and the first direction, the second direction, and the third direction intersect each other.

11. The welding fixture of claim 10, wherein, At least one of the third limiting portions includes a third sub-portion and a fourth sub-portion spaced apart along the second direction, and both the third sub-portion and the fourth sub-portion are movably connected to the base along the third direction; And / or, the welding fixture further includes a lifting member connected to the third limiting portion.

12. The welding fixture of any one of claims 1 to 6, wherein, The welding fixture also includes a detection element. The base is provided with a mounting hole that communicates with the receiving groove. The detection element is located in the mounting hole and is configured to detect whether the receiving groove contains a workpiece to be welded.

13. A tab welding apparatus characterized by comprising: Includes the welding fixture according to any one of claims 1 to 12.

14. A battery production system characterized by comprising: Including the electrode welding equipment according to claim 13.

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