Positioning fixture and tab welding apparatus

Abstract

A positioning fixture (100) and a tab welding apparatus, wherein the positioning fixture (100) is configured to weld tabs (200) and an electrode sheet (300). The positioning fixture (100) comprises a base (1) and a pressing plate structure (2), wherein the base (1) has a positioning surface located on one side in a first direction (X), and tab positioning grooves (12) and an electrode sheet positioning groove (13), which are in communication with each other, are formed on the positioning surface, such that the tabs (200) and the electrode sheet (300) positioned therein partially overlap to form points to be welded; and the pressing plate structure (2) is detachably mounted on the base (1), tab pressing portions (2112) and an electrode sheet pressing portion (2122) are formed on the pressing plate structure (2), and the tab pressing portions (2112) and the electrode sheet pressing portion (2122) are respectively arranged corresponding to the tab positioning grooves (12) and the electrode sheet positioning groove (13).

Description

Positioning fixtures and electrode welding equipment

[0001] This application claims priority to Chinese Patent Application No. 202520108983.4, filed on January 17, 2025, entitled “Positioning Fixture and Electrode Welding Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery processing technology, and in particular to a positioning fixture and electrode welding equipment. Background Technology

[0003] In the production of solid-state batteries, ultrasonic welding of electrode tabs is an important process. The manual ultrasonic welding process requires operators to perform the operation inside a glove box. During the welding process, the operator needs to manually place the electrode and the tab and keep pressing to ensure that the electrode and the tab overlap and are positioned in the welding area. However, it is difficult to achieve precise positioning of the electrode and the tab manually, which can easily lead to misalignment and displacement during welding, affecting the welding quality. Technical solutions

[0004] The main purpose of this application is to propose a positioning fixture and electrode tab welding equipment, which aims to improve the problem of poor positioning accuracy when manually pressing the electrode tab and electrode sheet during ultrasonic electrode tab welding.

[0005] Firstly, the positioning fixture proposed in this application is used for welding electrode tabs and electrode sheets, and the positioning fixture includes:

[0006] The base has a positioning surface on one side in a first direction, the positioning surface forming interconnected tab positioning grooves and electrode plate positioning grooves, so that the tabs and electrode plates positioned therein partially overlap to form a welding point; and,

[0007] The pressure plate structure is detachably installed on the base. The pressure plate structure has an electrode tab holding part and an electrode sheet holding part. The electrode tab holding part and the electrode sheet holding part are respectively provided corresponding to the electrode tab positioning groove and the electrode sheet positioning groove to hold the electrode tab and the electrode sheet therein.

[0008] The technical solution provided in this application includes an electrode positioning groove and an electrode plate positioning groove formed on the positioning surface of the base, which can respectively position and place the electrode and the electrode plate. The electrode positioning groove and the electrode plate positioning groove are interconnected, allowing the electrode and the electrode plate to partially overlap at the connected position, thus forming a welding point. An external welding component can then weld this point to connect the electrode and the electrode plate. Furthermore, the positioning fixture also includes a pressure plate structure that can be detachably installed on the base. The pressure plate structure has electrode holding parts and electrode plate holding parts corresponding to the electrode positioning groove and the electrode plate positioning groove, respectively. These parts can hold and position the electrode and the electrode plate, thus completely restricting their position. During the welding process by the external welding component, the electrode and the electrode plate are less likely to deviate. The positioning fixture proposed in this application replaces manual pressing, improving the positioning accuracy of the electrode and the electrode plate during welding, ensuring welding quality, reducing the labor intensity of operators, and improving work efficiency.

[0009] In some embodiments, at the connection position between the tab positioning groove and the electrode positioning groove, the base forms a clearance channel extending through the first direction.

[0010] The presence of the clearance channel allows external welding components (such as ultrasonic welding heads) to approach the welding points of the tabs and plates from both sides of the base along the first direction, reducing the impact of the welding process on the base and increasing the range of materials that can be selected for the base. For example, the base can be made of plastic and formed by 3D printing.

[0011] In some embodiments, the electrode positioning groove and the electrode holding part are grouped together, and two groups are arranged along the second direction on the same side of the electrode positioning groove;

[0012] The second direction intersects with the first direction.

[0013] By setting two sets of electrode positioning grooves and electrode holding parts, the positive electrode and the negative electrode can be held and fixed respectively. In this way, the welding and fixing of the positive electrode and the negative electrode can be completed in one welding process, ensuring the welding efficiency of the electrode.

[0014] In some embodiments, the pressure plate structure is magnetically connected to the base.

[0015] By setting the pressure plate structure and the base to magnetic connection, the pressure plate structure can be quickly installed and disassembled, and the electrode tabs and electrode sheets can be quickly positioned. Moreover, the magnetic connection structure is usually relatively simple, which reduces the processing difficulty of the base and pressure plate structure. At the same time, the magnetic connection method has high reliability and low probability of abnormal connection, provided that the electrode tabs and electrode sheets are pressed and fixed.

[0016] In some embodiments, the pressure plate structure and the base are respectively provided with magnetic attraction parts, and the two magnetic attraction parts are attracted to each other.

[0017] The pressure plate structure and / or the base are provided with a receiving groove, in which the corresponding magnetic suction part is received.

[0018] The design incorporates receiving slots on both the pressure plate structure and the base, allowing the magnetic suction parts to be completely concealed within these slots. This ensures sufficient contact area between the pressure plate structure and the base at the magnetic suction point, guaranteeing connection stability. Furthermore, the two magnetic suction parts also feature automatic attraction and alignment. When the two magnetic suction parts on the pressure plate structure and the base attract each other, it means that the electrode tab holding part and the electrode plate holding part on the pressure plate structure are precisely aligned with the electrode tab positioning slot and the electrode plate positioning slot on the base, respectively. This magnetic combination method improves the installation efficiency of the pressure plate structure.

[0019] In some embodiments, the tab positioning groove and the electrode positioning groove are arranged along a third direction;

[0020] The pressure plate structure includes two separate pressure plates that are opposite each other in the third direction, and the electrode tab holding part and the electrode sheet holding part are respectively formed on the two separate pressure plates.

[0021] By forming the tab holding part and the electrode holding part on two separate pressure plates, the tab and the electrode can be positioned sequentially. For example, the electrode can be positioned and stabilized first, and then the tab can be positioned to overlap with the electrode. During the positioning process of the tab, the tab can be finely adjusted, which helps to improve the positioning accuracy of the tab and the electrode.

[0022] In some embodiments, in a second direction intersecting the third direction, the tab holding portion and the electrode holding portion are respectively located at the middle of the corresponding split pressure plate;

[0023] The two ends of the split pressure plate along the second direction are magnetically connected to the base.

[0024] Since the tab holding part and the electrode holding part are located in the middle of the corresponding split pressure plate, and the two ends of each split pressure plate are magnetically connected to the base along the second direction, the split pressure plate can generate an attractive force from both ends and transfer it to the tab holding part or electrode holding part in the middle, thus ensuring the stable clamping of the tab and electrode by the split pressure plate.

[0025] In some embodiments, one of the split pressure plates is configured as an electrode pressure plate, the electrode pressure plate having a lifting end and a connecting end in a second direction intersecting the third direction, the connecting end being movably connected to the base, and the lifting end being movable and liftable along the first direction;

[0026] The electrode clamping portion is formed on the electrode clamping plate.

[0027] Specifically, for tabs that are typically small in area and thickness, by movably connecting the tab pressure plate to the base, the lifting end of the tab pressure plate can be lifted slightly in the first direction, which facilitates the replacement of the tab and ensures the efficiency of tab replacement.

[0028] In some embodiments, the positioning surface of the base forms a limiting hole, and the limiting hole is elongated along the second direction;

[0029] The connecting end forms a limiting protrusion, which extends into the limiting hole and is movable in the limiting hole along the second direction.

[0030] Among them, under the premise that the connecting end of the electrode pressure plate can be restricted by the limiting hole and kept within a certain range, and the lifting end can be lifted to a certain height in the first direction, the production cost of the positioning fixture is reduced by the simple movable connection between the limiting protrusion and the elongated limiting hole.

[0031] In some embodiments, the limiting protrusion is elongated along the second direction.

[0032] In this design, by setting the limiting protrusion in an elongated shape along the second direction, and combining the fitting relationship between the limiting protrusion and the limiting hole, the limiting protrusion can only accommodate the movement of the lifting end and swing along the third axis in the limiting hole. Under the limiting and stopping action of the hole wall of the limiting hole, the limiting protrusion is difficult to rotate along the axis in the first direction, which restricts the rotational freedom of the connecting end and is conducive to the rapid return of the electrode tab pressure plate to the installation and positioning position.

[0033] In some embodiments, one of the split pressure plates is configured as an electrode pressure plate, wherein the electrode pressure plate and one of the positioning surfaces have a positioning protrusion and the other has a mating recess, and the positioning protrusion is inserted into the mating recess;

[0034] The electrode holding portion is formed on the electrode pressing plate.

[0035] The correct installation position of the electrode plate can be quickly found by the insertion and engagement of the positioning protrusion and the mating recess, which helps to improve the positioning and installation efficiency of the electrode.

[0036] Secondly, this application also proposes a tab welding device, which includes the aforementioned positioning fixture. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 structures shown in these drawings without creative effort.

[0038] Figure 1 is a structural schematic diagram of an embodiment of the positioning fixture provided in this application;

[0039] Figure 2 is a structural schematic diagram of the base in Figure 1 from one perspective;

[0040] Figure 3 is a structural schematic diagram of the split pressure plate (pole tab pressure plate) in Figure 1 from one perspective;

[0041] Figure 4 is a structural schematic diagram of the split pressure plate (electrode pressure plate) in Figure 1 from one perspective.

[0042] Explanation of reference numerals: 100, Positioning clamp; 200, Electrode tab; 300, Electrode sheet; 1, Base; 11, Clearance channel; 12, Electrode tab positioning groove; 13, Electrode sheet positioning groove; 14, Limiting hole; 15, Mating recess; 2, Pressure plate structure; 21, Split pressure plate; 211, Electrode tab pressure plate; 211a, Lifting end; 211b, Connecting end; 2111, Limiting protrusion; 2112, Electrode tab holding part; 212, Electrode sheet pressure plate; 2121, Positioning protrusion; 2122, Electrode sheet holding part; 3a, Receiving groove; X, First direction; Y, Second direction; Z, Third direction.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0044] Implementation methods of this application

[0045] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0048] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0050] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0052] In the production of solid-state batteries, ultrasonic welding of electrode tabs is an important process. The manual ultrasonic welding process requires operators to perform the operation inside a glove box. During the welding process, operators need to manually place the electrode and the tab and keep pressing to ensure that the electrode and the tab overlap and are positioned in the welding area. This increases the difficulty of manual operation in the welding process, as it is difficult to achieve precise positioning of the electrode and the tab manually. This can easily lead to misalignment and displacement during welding, affecting the welding quality. In addition, manual pressing and positioning requires manpower and has low work efficiency.

[0053] Analysis of the above problems shows that the manual ultrasonic welding process requires manual holding of the electrode and the tab. The uncertainty of manual operation is the main reason for the poor positioning accuracy of the tab and the electrode. To address this problem, there are some technical solutions, such as setting up a fixture to position and load the tab and the electrode. However, these technical solutions generally have a problem: the fixture can only restrict the movement of the tab and the electrode in the horizontal direction. During the ultrasonic welding process, the tab and the electrode often move due to the lack of holding and limiting, which will also cause misalignment and displacement of the electrode and the tab.

[0054] In response to the above situation, this application proposes a positioning fixture with a pressure plate structure, which aims to improve the problem of poor positioning accuracy when manually pressing the electrode tab and electrode sheet during the ultrasonic welding process.

[0055] To facilitate understanding of the positioning fixture provided in this application, the following description is provided in conjunction with the accompanying drawings. Figure 1 is a structural schematic diagram of an embodiment of the positioning fixture provided in this application; Figure 2 is a structural schematic diagram of the base in Figure 1 from one perspective; Figure 3 is a structural schematic diagram of the split pressure plate (electrode pressure plate) in Figure 1 from one perspective; and Figure 4 is a structural schematic diagram of the split pressure plate (electrode pressure plate) in Figure 1 from one perspective.

[0056] Please refer to Figure 1. In one embodiment of this application, the positioning fixture 100 is used for welding the tab 200 and the electrode 300. The positioning fixture 100 includes a base 1 and a pressure plate structure 2. The base 1 has a positioning surface on one side of the first direction X. The positioning surface forms a tab positioning groove 12 and an electrode positioning groove 13 that are interconnected, so that the tab 200 and the electrode 300 positioned therein partially overlap to form a welding point. The pressure plate structure 2 is detachably installed on the base 1. The pressure plate structure 2 has a tab holding part 2112 and an electrode holding part 2122 formed on it. The tab holding part 2112 and the electrode holding part 2122 are respectively provided corresponding to the tab positioning groove 12 and the electrode positioning groove 13 to hold the tab 200 and the electrode 300 therein.

[0057] It should be noted that "base 1" is a major loading component of the positioning fixture 100. Its function is not only to position the electrode tabs 200 and electrode plates 300, but also to connect to the working platform of the electrode tab welding equipment. "Base 1 has a positioning surface on one side of a first direction X," where the first direction X usually refers to the thickness direction of base 1, but may also refer to other directions of base 1. The "positioning surface" can generally be understood as a plane, but it could also be a stepped surface. In any case, interconnected electrode tab positioning grooves 12 and electrode plate positioning grooves 13 are formed on the positioning surface. The connecting direction (or relative direction) of the positioning groove 13 can be any direction within the positioning surface; the tab positioning groove 12 can position the tab 200 to be welded, and the electrode positioning groove 13 can position the electrode 300 to be welded. Since the tab positioning groove 12 and the electrode positioning groove 13 are interconnected, it is worth mentioning that the connecting position of the tab positioning groove 12 on the electrode positioning groove 13 corresponds to the position where the electrode positioning groove 13 can expose the part to be welded (foil tab 200) on the electrode 300, so that the tab 200 and the part to be welded on the electrode 300 can overlap each other to form a welding point.

[0058] The "pressure plate structure 2" is detachably installed on the base 1, and includes at least two installation methods. One method involves the entire pressure plate structure 2 being detachable from the base 1, and the other method involves one end of the pressure plate structure 2 being hinged to the base 1 and the other end being fastened to the base 1. This embodiment does not limit the specific method. The pressure plate structure 2 can be integrally formed or separately formed corresponding to the tab positioning groove 12 and the electrode positioning groove 13. This embodiment does not limit the specific method. The "pressure plate structure 2 has a tab holding part 2112 and an electrode holding part 2122 formed on it." After the pressure plate structure 2 is installed on the base 1, the tab holding part 2112 can be aligned with the tab positioning groove 12. The tab 200 is pressed and fixed, and the electrode holding part 2122 can be aligned with the electrode positioning groove 13 to press and fix the electrode 300. It is worth mentioning that the tab holding part 2112 and the electrode holding part 2122 can be set as protruding structures (as shown in Figures 3 and 4) so ​​as to extend into the corresponding positioning groove to perform the pressing action. The tab holding part 2112 and the electrode holding part 2122 can also be set as planar structures to perform the pressing action from the outside of the corresponding positioning groove (for example, when the thickness of the tab 200 and the electrode 300 is greater than the depth of the corresponding positioning groove, they can be pressed and fixed from the outside).

[0059] The technical solution provided in this application includes a tab positioning groove 12 and an electrode positioning groove 13 formed on the positioning surface of the base 1, which can respectively position and place the tab 200 and the electrode 300. The tab positioning groove 12 and the electrode positioning groove 13 are interconnected, allowing the tab 200 and the electrode 300 to partially overlap at the connected position, thus forming a welding point. An external welding component can then weld this welding point to connect the tab 200 and the electrode 300. Furthermore, the positioning fixture 100 also includes a pressure plate structure 2 that can be detachably installed on the base 1, and the pressure plate structure 2 has tab holding portions 2 formed on it corresponding to the tab positioning groove 12 and the electrode positioning groove 13. The electrode holder 2112 and the electrode plate holding part 2122 can respectively hold and position the electrode 200 and the electrode plate 300, thereby completely restricting the position of the electrode 200 and the electrode plate 300. During the welding process of the welding point by the external welding parts, the electrode 200 and the electrode plate 300 are not easy to deviate. The positioning fixture 100 proposed in this application replaces the manual pressing method. After it is applied to the ultrasonic electrode welding equipment, it can improve the positioning accuracy of the electrode 200 and the electrode plate 300 during the ultrasonic welding process, ensure the welding quality, reduce the labor intensity of the operators, and improve the work efficiency.

[0060] Referring to Figure 2, in some embodiments, at the connection position between the tab positioning groove 12 and the electrode positioning groove 13, the base 1 forms a clearance channel 11 through the first direction X.

[0061] It should be noted that the "yield channel 11" is formed at the connection position between the tab positioning groove 12 and the electrode positioning groove 13. Its main purpose is to expose the welding point formed by the partial overlap of the tab 200 and the electrode 300 along the first direction X. The projection shape of the yield channel 11 along the first direction X can be square or circular. The specific setting position of the yield channel 11 can be in the tab positioning groove 12 or in the electrode positioning groove 13 (as shown in Figures 1 and 2), or it can be in both the tab positioning groove 12 and the electrode positioning groove 13 at the same time. This embodiment does not limit this.

[0062] According to the above technical solution, due to the existence of the clearance channel 11, the external welding components (such as ultrasonic welding heads) can approach the welding points of the tab 200 and the electrode 300 from both sides of the base 1 along the first direction X, which reduces the impact of the welding process on the base 1 and increases the range of selectable materials for processing the base 1. For example, the base 1 can be made of plastic material and formed by 3D printing.

[0063] In other embodiments, the base 1 can also be made of a high-strength material to replace the clearance channel 11. External welding components (such as ultrasonic welding heads) can directly act on the welding points of the tab 200 and the electrode 300, and the welding points are stopped by the base 1.

[0064] Please refer to Figures 1 and 2. In some embodiments, the tab positioning groove 12 and the tab holding part 2112 are grouped together, and two groups are arranged along the second direction Y on the same side of the electrode positioning groove 13; the second direction Y intersects the first direction X.

[0065] It should be noted that two tabs 200, namely a positive tab and a negative tab, are usually welded onto the electrode 300. Of course, the welding of the positive tab and the negative tab can be carried out in steps, but this will undoubtedly reduce the welding efficiency. "Second direction Y" usually refers to the direction within the positioning surface, that is, the direction intersecting with the first direction X. In this embodiment, two tab positioning grooves 12 are provided, and their functions are to position the positive tab and the negative tab, respectively. It can be understood that both tab positioning grooves 12 are connected to the electrode positioning groove 13, and the positive tab and the negative tab can respectively overlap with the part to be welded (foil tab) on the electrode 300 at the corresponding connected position. Since the two tab positioning grooves 12 are arranged along the second direction Y on the same side of the electrode positioning groove 13, it can be understood that the positive tab and the negative tab are on the same side of the electrode 300 to be welded by the positioning fixture 100.

[0066] According to the above technical solution, by setting two sets of electrode positioning grooves 12 and electrode holding parts 2112 respectively, the positive electrode and the negative electrode can be held and fixed respectively. In this way, the welding and fixing of the positive electrode and the negative electrode can be completed in one welding process, ensuring the welding efficiency of the electrode 200.

[0067] In some embodiments, the pressure plate structure 2 and the base 1 are magnetically connected.

[0068] It should be noted that there are multiple combinations of magnetic connection methods. For example, two magnets of opposite polarity can be magnetically connected, or a magnet and a metal that can be attracted by the magnet can also be magnetically connected. This embodiment only requires that the pressure plate structure 2 and the base 1 be connected by magnetic attraction, and does not limit the specific implementation method.

[0069] According to the above technical solution, by setting the pressure plate structure 2 and the base 1 to a magnetic connection, the pressure plate structure 2 can be quickly installed and disassembled, and the electrode tab 200 and the electrode plate 300 can be quickly positioned. Moreover, the magnetic connection structure is usually relatively simple, which reduces the processing difficulty of the base 1 and the pressure plate structure 2. At the same time, the magnetic connection method has high reliability and low probability of abnormal connection, provided that it can hold and fix the electrode tab 200 and the electrode plate 300.

[0070] In some embodiments, one of the pressure plate structure 2 and the base 1 is made of a metal (e.g., iron) that can be attracted by a magnet, while the other is provided with a magnet.

[0071] Referring to Figures 2 to 4, in some embodiments, magnetic suction parts are respectively provided on the pressure plate structure 2 and the base 1, and the two magnetic suction parts are attracted to each other; the pressure plate structure 2 and / or the base 1 are provided with receiving grooves 3a, and the corresponding magnetic suction parts are accommodated in the receiving grooves 3a.

[0072] It should be noted that the two parallel technical features mentioned above, "the pressure plate structure 2 is provided with a receiving groove 3a" and "the base 1 is provided with a receiving groove 3a", can be set individually or simultaneously. Obviously, setting them simultaneously is better. In this embodiment, the two magnetic suction parts can both be magnets, or one can be a magnet and the other can be a metal that can be attracted by the magnet. Based on this, the materials of the pressure plate structure 2 and the base 1 can be understood as antimagnetic materials, such as plastic materials.

[0073] According to the above technical solution, receiving grooves 3a are respectively provided on the pressure plate structure 2 and the base 1, so that the magnetic attraction part can be completely hidden in the corresponding receiving groove 3a, ensuring that the pressure plate structure 2 and the base 1 have sufficient contact area at the magnetic attraction point, thus ensuring the stability of the connection. Moreover, the two magnetic attraction parts also have the function of automatic attraction and alignment. When the two magnetic attraction parts on the pressure plate structure 2 and the base 1 attract each other, it means that the electrode tab holding part 2112 and the electrode plate holding part 2122 on the pressure plate structure 2 are exactly aligned with the electrode tab positioning groove 12 and the electrode plate positioning groove 13 on the base 1, respectively. This magnetic attraction combination method improves the installation efficiency of the pressure plate structure 2.

[0074] Please refer to Figure 1. In some embodiments, the tab positioning groove 12 and the electrode positioning groove 13 are arranged along the third direction Z. The pressure plate structure 2 includes two separate pressure plates 21 opposite each other in the third direction Z. The tab holding part 2112 and the electrode holding part 2122 are respectively formed on the two separate pressure plates 21.

[0075] It should be noted that "third direction Z" refers to the direction within the positioning surface, that is, the direction intersecting with the first direction X; "the electrode positioning groove 12 and the electrode positioning groove 13 are arranged along the third direction Z" means that the electrode positioning groove 12 and the electrode positioning groove 13 are connected in the third direction Z; this embodiment defines the pressure plate structure 2 as including two separate pressure plates 21 opposite to each other in the third direction Z, and the electrode holding part 2112 and the electrode holding part 2122 are respectively formed on the two separate pressure plates 21. Therefore, the positioning of the electrode 200 and the electrode 300 can be performed sequentially. At the same time, the two separate pressure plates 21 are opposite to each other in the third direction Z, so that the welding points of the electrode 200 and the electrode 300 can be exposed in the first direction X.

[0076] According to the above technical solution, by forming the tab holding part 2112 and the electrode holding part 2122 on the two separate pressure plates 21 respectively, the tab 200 and the electrode 300 can be positioned sequentially. For example, the electrode 300 can be positioned and stabilized first, and then the tab 200 can be positioned to partially overlap with the electrode 300. During the positioning process of the tab 200, the tab 200 can be finely adjusted, which is beneficial to improving the positioning accuracy of the tab 200 and the electrode 300.

[0077] Referring to Figures 3 and 4, in some embodiments, on the second direction Y intersecting the third direction Z, the tab holding part 2112 and the electrode holding part 2122 are respectively located in the middle of the corresponding split pressure plate 21; the split pressure plate 21 is magnetically connected to the base 1 at both ends along the second direction Y.

[0078] It should be noted that "third direction Z" and "second direction Y" are two intersecting directions within the positioning plane, and intersect with the first direction X in pairs. For example, third direction Z is the front-back direction, second direction Y is the left-right direction, and first direction X is the up-down direction.

[0079] According to the above technical solution, since the tab holding part 2112 and the electrode holding part 2122 are respectively located in the middle of the corresponding split pressure plate 21, and each split pressure plate 21 is magnetically connected to the base 1 at both ends along the second direction Y, the split pressure plate 21 can generate attractive force from both ends and transfer it to the tab holding part 2112 or the electrode holding part 2122 corresponding in the middle, thus ensuring the stable clamping of the tab 200 and the electrode 300 by the split pressure plate 21.

[0080] Referring to Figure 3, in some embodiments, one of the split pressure plates 21 is configured as an electrode pressure plate 211. The electrode pressure plate 211 has a lifting end 211a and a connecting end 211b located in a second direction Y intersecting the third direction Z. The connecting end 211b is movably connected to the base 1, and the lifting end 211a can be lifted and moved along the first direction X. The electrode holding part 2112 is formed on the electrode pressure plate 211.

[0081] It should be noted that the intersection relationship of the third direction Z, the second direction Y, and the first direction X has been explained in the above embodiments, and will not be repeated in this embodiment. One of the two split pressure plates 21 is set as the electrode tab pressure plate 211, which means that the electrode tab holding part 2112 is formed on the electrode tab pressure plate 211. The two ends of the electrode tab pressure plate 211 along the second direction Y are respectively set as the lifting end 211a and the connecting end 211b. There are various possibilities for the movable connection between the connecting end 211b and the base 1. For example, in some embodiments, the connecting end 211b is hinged to the base 1 along the axis of the third direction Z, which allows the lifting end 211a to be lifted and moved along the first direction X as the connecting end 211b rotates. This embodiment only limits the connecting end 211b to be movably connected to the base 1 and the lifting end 211a to be lifted and moved along the first direction X, and does not limit the specific movable connection method between the connecting end 211b and the base 1.

[0082] According to the above technical solution, for the tab 200 which is usually small in area and thickness, by movably connecting the connecting end 211b of the tab pressure plate 211 to the base 1, the lifting end 211a of the tab pressure plate 211 can be lifted by a small amount in the first direction X, so that the tab 200 can be replaced conveniently and the replacement efficiency of the tab 200 can be guaranteed.

[0083] Regarding the specific movable connection method between the connecting end 211b and the base 1, please refer to Figure 2. In some embodiments, the positioning surface of the base 1 forms a limiting hole 14, which is elongated along the second direction Y; the connecting end 211b forms a limiting protrusion 2111, which extends into the limiting hole 14 and is movable along the second direction Y within the limiting hole 14.

[0084] It should be noted that the limiting hole 14 is elongated in the second direction Y, and the limiting protrusion 2111 formed by the connecting end 211b can move in the limiting hole 14 along the second direction Y, so that the connecting end 211b has a certain amount of movement along the second direction Y, so that the lifting end 211a can be lifted along the first direction X (if there is a certain precision fitting connection between the limiting hole 14 and the limiting protrusion 2111, then the tab plate 211 can only move as a whole along the first direction X, and it is impossible to lift the lifting end 211a along the first direction X when the connecting end 211b is moved to the base 1).

[0085] According to the above technical solution, under the premise that the connecting end 211b of the electrode clamping plate 211 can be limited by the limiting hole 14 and kept within a certain range, and the lifting end 211a can be lifted to a certain height along the first direction X, the production cost of the positioning fixture 100 is reduced by the simple movable connection between the limiting protrusion 2111 and the elongated limiting hole 14; the limiting protrusion 2111 can move in the limiting hole 14 along the second direction Y, which means that the movement of the limiting protrusion 2111 in the third direction Z is restricted, which is beneficial to maintaining the position of the connecting end 211b in the third direction Z.

[0086] Referring to Figure 3, in some embodiments, the limiting protrusion 2111 is elongated along the second direction Y.

[0087] It should be noted that the limiting hole 14 is elongated along the second direction Y, and the limiting protrusion 2111 is also elongated along the second direction Y. Furthermore, the limiting protrusion 2111 is movable in the limiting hole 14 along the second direction Y. This means that the size of the limiting protrusion 2111 along the second direction Y is smaller than the size of the limiting hole 14 along the second direction Y, but the size of the limiting protrusion 2111 along the third direction Z is comparable to the size of the limiting hole 14 along the third direction Z.

[0088] According to the above technical solution, by setting the limiting protrusion 2111 in an elongated shape along the second direction Y, and combining the cooperation relationship between the limiting protrusion 2111 and the limiting hole 14, the limiting protrusion 2111 can only accommodate the movement of the lifting end 211a in the limiting hole 14 to swing along the third direction Z axis. Under the limiting and stopping action of the hole wall of the limiting hole 14, the limiting protrusion 2111 is difficult to rotate along the first direction X axis, so that the rotational freedom of the connecting end 211b is restricted, which is conducive to the rapid return of the electrode tab pressure plate 211 to the installation positioning position.

[0089] Referring to Figure 4, in some embodiments, one of the split pressure plates 21 is configured as an electrode pressure plate 212. The electrode pressure plate 212 and one of the positioning surfaces have a positioning protrusion 2121 and the other has a mating recess 15. The positioning protrusion 2121 is inserted into the mating recess 15. The electrode holding part 2122 is formed on the electrode pressure plate 212.

[0090] It should be noted that "one of the electrode pressure plate 212 and the positioning surface has a positioning protrusion 2121 and the other has a mating recess 15" includes two cases: one is that the electrode pressure plate 212 has a positioning protrusion 2121 and the positioning surface has a mating recess 15; the other is that the electrode pressure plate 212 has a mating recess 15 and the positioning surface has a positioning protrusion 2121. The positioning protrusion 2121 usually includes a positioning pin, while the mating recess 15 usually includes a mating groove.

[0091] According to the above technical solution, by inserting and engaging the positioning protrusion 2121 with the mating recess 15, the correct installation position of the electrode pressure plate 212 can be quickly found, which is beneficial to improving the positioning and installation efficiency of the electrode 300.

[0092] Furthermore, in some embodiments, referring to Figures 2 and 4, the positioning protrusions 2121 and the mating recesses 15 are grouped in a one-to-one correspondence, and two groups are provided at both ends of the electrode pressure plate 212 along the second direction Y.

[0093] This application also proposes a tab welding device, which includes a positioning fixture 100. The specific structure of the positioning fixture 100 is as described in the above embodiments. Since this tab welding device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the tab welding device includes, but is not limited to, ultrasonic welding equipment and laser welding equipment.

[0094] This application proposes a positioning fixture 100 for welding tabs 200 and electrode plates 300. The positioning fixture 100 includes a base 1 and a pressure plate structure 2. A positioning surface is formed on one side of the base 1 in the first direction X. The positioning surface forms a clearance channel 11 that runs through the first direction X, two tab positioning grooves 12 arranged in the second direction Y, and electrode plate positioning grooves 13 arranged in the third direction Z opposite to the two tab positioning grooves 12. The electrode plate positioning grooves 13 and the two tab positioning grooves 12 are respectively connected to the clearance channel 11. The pressure plate structure 2 includes two split pressure plates 21. The two split pressure plates 21 are magnetically connected to the base 1 at both ends in the second direction Y. The two split pressure plates 21 include a tab pressure plate 211 and an electrode plate pressure plate 212. The middle of the tab pressure plate 211 and the electrode plate pressure plate 212 respectively form a tab holding part 2112 and an electrode holding part 2122 corresponding to the tab positioning groove 12 and the electrode plate positioning groove 13.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not 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 modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A positioning fixture for welding electrode tabs and electrode sheets, characterized in that, The positioning fixture includes: The base has a positioning surface on one side in a first direction, the positioning surface forming interconnected tab positioning grooves and electrode plate positioning grooves, so that the tabs and electrode plates positioned therein partially overlap to form a welding point; and, The pressure plate structure is detachably installed on the base. The pressure plate structure has an electrode tab holding part and an electrode sheet holding part. The electrode tab holding part and the electrode sheet holding part are respectively provided corresponding to the electrode tab positioning groove and the electrode sheet positioning groove to hold the electrode tab and the electrode sheet therein.

2. The positioning fixture as described in claim 1, characterized in that, At the position where the tab positioning groove and the electrode positioning groove are connected, the base has a clearance channel extending through the first direction.

3. The positioning fixture as described in claim 1, characterized in that, The electrode positioning groove and the electrode holding part are grouped together, and two groups are arranged along the second direction on the same side of the electrode positioning groove. The second direction intersects with the first direction.

4. The positioning fixture as described in claim 3, characterized in that, At the position where the tab positioning groove and the electrode positioning groove are connected, the base has a clearance channel extending through the first direction.

5. The positioning fixture as described in claim 1, characterized in that, The pressure plate structure is magnetically connected to the base.

6. The positioning fixture as described in claim 5, characterized in that, The pressure plate structure and the base are respectively provided with magnetic attraction parts, and the two magnetic attraction parts are attracted to each other. The pressure plate structure and / or the base are provided with a receiving groove, in which the corresponding magnetic suction part is received.

7. The positioning fixture as described in claim 5, characterized in that, The electrode positioning groove and the electrode holding part are grouped together, and two groups are arranged along the second direction on the same side of the electrode positioning groove. The second direction intersects with the first direction.

8. The positioning fixture as described in claim 5, characterized in that, At the position where the tab positioning groove and the electrode positioning groove are connected, the base has a clearance channel extending through the first direction.

9. The positioning fixture as described in claim 8, characterized in that, The electrode positioning groove and the electrode holding part are grouped together, and two groups are arranged along the second direction on the same side of the electrode positioning groove. The second direction intersects with the first direction.

10. The positioning fixture according to any one of claims 1 to 9, characterized in that, The electrode positioning groove and the electrode plate positioning groove are arranged along the third direction; The pressure plate structure includes two separate pressure plates that are opposite each other in the third direction, and the electrode tab holding part and the electrode sheet holding part are respectively formed on the two separate pressure plates.

11. The positioning fixture as described in claim 10, characterized in that, In a second direction intersecting the third direction, the tab holding portion and the electrode holding portion are respectively located in the middle of the corresponding split pressure plate; The two ends of the split pressure plate along the second direction are magnetically connected to the base.

12. The positioning fixture as described in claim 10, characterized in that, One of the split pressure plates is configured as an electrode pressure plate, the electrode pressure plate having a lifting end and a connecting end in a second direction intersecting the third direction, the connecting end being movably connected to the base, and the lifting end being movable and lifting along the first direction; The electrode clamping portion is formed on the electrode clamping plate.

13. The positioning fixture as described in claim 12, characterized in that, The positioning surface of the base forms a limiting hole, and the limiting hole is elongated along the second direction; The connecting end forms a limiting protrusion, which extends into the limiting hole and is movable in the limiting hole along the second direction.

14. The positioning fixture as described in claim 13, characterized in that, The limiting protrusion is elongated along the second direction.

15. The positioning fixture as described in claim 12, characterized in that, In a second direction intersecting the third direction, the tab holding portion and the electrode holding portion are respectively located in the middle of the corresponding split pressure plate; The two ends of the split pressure plate along the second direction are magnetically connected to the base.

16. The positioning fixture as described in claim 10, characterized in that, One of the split pressure plates is configured as an electrode pressure plate. The electrode pressure plate and one of the positioning surfaces have a positioning protrusion and the other has a mating recess. The positioning protrusion is inserted into the mating recess. The electrode holding portion is formed on the electrode pressing plate.

17. The positioning fixture as described in claim 16, characterized in that, One of the split pressure plates is configured as an electrode pressure plate, the electrode pressure plate having a lifting end and a connecting end in a second direction intersecting the third direction, the connecting end being movably connected to the base, and the lifting end being movable and lifting along the first direction; The electrode clamping portion is formed on the electrode clamping plate.

18. The positioning fixture as described in claim 16, characterized in that, In a second direction intersecting the third direction, the tab holding portion and the electrode holding portion are respectively located in the middle of the corresponding split pressure plate; The two ends of the split pressure plate along the second direction are magnetically connected to the base.

19. The positioning fixture as described in claim 18, characterized in that, One of the split pressure plates is configured as an electrode pressure plate, the electrode pressure plate having a lifting end and a connecting end in a second direction intersecting the third direction, the connecting end being movably connected to the base, and the lifting end being movable and lifting along the first direction; The electrode clamping portion is formed on the electrode clamping plate.

20. A tab welding device, characterized in that, Including the positioning fixture as described in any one of claims 1 to 19.

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