Positioning fixture and tab welding equipment

Abstract

The utility model discloses a positioning clamp and tab welding equipment, and relates to the technical field of battery machining, the positioning clamp is used for welding a tab and a pole piece, the positioning clamp comprises a base and a pressing plate structure, the base is provided with a positioning face located on one side of the first direction, and the pressing plate structure is arranged on the base; a tab positioning groove and a pole piece positioning groove which are communicated with each other are formed in the tab welding equipment positioning surface, so that the tab and the pole piece positioned in the tab welding equipment positioning surface are partially overlapped to form a to-be-welded point; the pressing plate structure is detachably mounted on the tab welding equipment base, a tab pressing part and a pole piece pressing part are formed on the tab welding equipment pressing plate structure, and the tab pressing part of the tab welding equipment and the pole piece pressing part of the tab welding equipment are arranged corresponding to the tab positioning groove of the tab welding equipment and the pole piece positioning groove of the tab welding equipment respectively. According to the technical scheme provided by the invention, the tabs and the pole pieces are positioned through the base, and then the tabs and the pole pieces are pressed and held through the pressing plate structure, so that the positioning accuracy of the tabs and the pole pieces is improved.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to a positioning fixture and a tab welding device. Background Art

[0002] In the production process of solid-state batteries, ultrasonic welding of pole tabs is an important process. The manual ultrasonic welding process requires operators to complete the operation in a glove box. During the welding process, operators need to manually place the pole piece and the pole tab and keep pressing so that the pole piece and the pole tab overlap and are positioned in the welding area. However, it is difficult to achieve precise positioning of the pole piece and the pole tab manually, which leads to misalignment and offset when welding the pole piece and the pole tab, affecting the welding quality. Utility Model Content

[0003] The main purpose of this application is to propose a positioning fixture and a pole piece welding device, which aims to improve the problem of poor positioning accuracy caused by manual pressing of the pole piece and the pole piece during ultrasonic welding of the pole piece.

[0004] In the first aspect, the positioning fixture proposed in the present application is used for welding the pole ear and the pole piece, and the positioning fixture comprises:

[0005] A base having a positioning surface on one side of the first direction, wherein the positioning surface is formed with a pole ear positioning groove and a pole piece positioning groove that are interconnected, so that the pole ear and the pole piece positioned therein partially overlap to form a point to be welded; and,

[0006] The pressing plate structure is detachably mounted on the base, and is formed with a pole ear pressing portion and a pole piece pressing portion, and the pole ear pressing portion and the pole piece pressing portion are respectively arranged corresponding to the pole ear positioning groove and the pole piece positioning groove to press the pole ear and the pole piece therein.

[0007] The technical solution provided by the present application is that a pole ear positioning groove and a pole piece positioning groove are formed on the positioning surface of the base, which can respectively position and place the pole ear and the pole piece, and at the same time, the pole ear positioning groove and the pole piece positioning groove are interconnected, so that the pole ear and the pole piece can partially overlap at the connected position, thereby forming a welding point, and the external welding component can weld the welding point to connect the pole ear and the pole piece; not only that, the positioning fixture also includes a pressure plate structure that can be detachably installed on the base, and the pressure plate structure has a pole ear pressing portion and a pole piece pressing portion formed corresponding to the pole ear positioning groove and the pole piece positioning groove, respectively, the pole ear pressing portion and the pole piece pressing portion can respectively press and position the pole ear and the pole piece, thereby completely limiting the position of the pole ear and the pole piece, and in the process of welding the welding point by the external welding component, the pole ear and the pole piece are not easy to deviate. The positioning fixture proposed in the present application replaces the manual pressing method, improves the positioning accuracy of the pole ear and the pole piece during welding, ensures the welding quality, and at the same time reduces the labor intensity of the operators and improves the working efficiency.

[0008] In some embodiments, corresponding to the connecting position between the pole ear positioning groove and the pole piece positioning groove, the base is provided with a clearance channel penetrating along the first direction.

[0009] Among them, due to the existence of the give way channel, the external welding components (such as ultrasonic welding heads) can approach the welding points of the pole ears and pole pieces 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 choices for the base processing material. For example, the base can be selected to be made of plastic material and formed by 3D printing.

[0010] In some embodiments, the tab positioning grooves and the tab pressing portions are grouped correspondingly, and two groups are arranged along the second direction on the same side of the pole piece positioning grooves;

[0011] The second direction intersects the first direction.

[0012] Among them, by arranging two groups of tab positioning grooves and tab pressing portions correspondingly, the positive tab and the negative tab can be pressed and fixed respectively. In this way, the positive tab and the negative tab can be welded and fixed in one welding process, thereby ensuring the welding efficiency of the tabs.

[0013] In some embodiments, the pressure plate structure is magnetically connected to the base.

[0014] Among them, by setting the pressure plate structure and the base as a magnetic connection, the pressure plate structure can be quickly installed and disassembled to achieve rapid positioning of the pole ear and the pole piece; not only that, the magnetic connection structure is usually simpler, which reduces the processing difficulty of the base and the pressure plate structure. At the same time, the magnetic connection method has a higher reliability and a lower probability of abnormal connection while satisfying the premise of pressing and fixing the pole ear and the pole piece.

[0015] In some embodiments, the pressure plate structure and the base are respectively provided with magnetic attraction parts, and the two magnetic attraction parts are arranged to attract each other;

[0016] The pressing plate structure and / or the base are provided with a receiving groove, and the corresponding magnetic attraction part is received in the receiving groove.

[0017] Among them, accommodating grooves are respectively arranged on the pressure plate structure and the base, and the magnetic attraction part can be completely hidden in the corresponding accommodating grooves, ensuring that the pressure plate structure and the base have sufficient contact area at the magnetic attraction point, thereby ensuring the stability of the connection; not only that, the two magnetic attraction parts are also provided with the function of automatic attraction and alignment. When the two magnetic attraction parts on the pressure plate structure and the base attract each other, it means that the pole ear pressing part and the pole piece pressing part on the pressure plate structure are just aligned with the pole ear positioning groove and the pole piece positioning groove on the base respectively. This magnetic attraction combination method improves the installation efficiency of the pressure plate structure.

[0018] In some embodiments, the pole lug positioning groove and the pole piece positioning groove are arranged along a third direction;

[0019] The pressure plate structure includes two split pressure plates that are opposite to each other in the third direction, and the pole tab pressing portion and the pole piece pressing portion are respectively formed on the two split pressure plates.

[0020] Among them, by forming the pole ear pressing part and the pole piece pressing part on two separate pressure plates respectively, the pole ear and the pole piece can be positioned successively. For example, the pole piece can be positioned and stabilized first, and then the pole ear can be positioned to overlap with the pole piece part. During the positioning process of the pole ear, the pole ear can be fine-tuned, which is beneficial to improve the positioning accuracy of the pole ear and the pole piece.

[0021] In some embodiments, in a second direction intersecting with the third direction, the pole tab pressing portion and the pole piece pressing portion are respectively located in the middle of the corresponding split pressing plate;

[0022] Two ends of the split pressing plate along the second direction are respectively magnetically connected to the base.

[0023] Among them, since the pole ear pressing part and the pole piece pressing part are respectively located in the middle part of the corresponding split pressure plate, and the two ends of each split pressure plate along the second direction are respectively magnetically connected to the base, the split pressure plate can generate attractive force from both ends, and transmit it to the corresponding pole ear pressing part or pole piece pressing part in the middle, ensuring the stable clamping of the pole ear and pole piece by the split pressure plate.

[0024] In some embodiments, one of the split pressure plates is configured as a tab pressure plate, the tab 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 liftable and movable along the first direction;

[0025] The tab pressing portion is formed on the tab pressing plate.

[0026] Among them, for the pole lugs that are usually small in area and thickness, the connecting end of the pole lug pressure plate is movably connected to the base so that the lifting end of the pole lug pressure plate can be lifted a small amount along the first direction, so that the pole lug can be replaced conveniently, ensuring the replacement efficiency of the pole lug.

[0027] In some embodiments, a limiting hole is formed on the positioning surface of the base, and the limiting hole is arranged in an elongated shape along the second direction;

[0028] The connection end forms a limiting protrusion, the limiting protrusion extends into the limiting hole and is movable in the limiting hole along the second direction.

[0029] Among them, under the premise that the connecting end of the tab pressure plate can be restricted by the limiting hole and maintained within a certain range, and the lifting end can be lifted to a certain height along the first direction, the production cost of the positioning fixture is reduced by a simple movable connection between the limiting protrusion and the elongated limiting hole.

[0030] In some embodiments, the limiting protrusion is arranged to be elongated along the second direction.

[0031] Among them, by setting the limiting protrusion in an elongated shape along the second direction, combined with the matching relationship between the limiting protrusion and the limiting hole, the limiting protrusion can only adapt to the movement of the lifting end to swing along the axis of the third direction in the limiting hole. Under the limiting stop action of the hole wall of the limiting hole, the limiting protrusion is difficult to rotate along the axis of the first direction, so that the rotational freedom of the connecting end is restricted, which is conducive to the rapid return of the pole ear pressure plate to the installation positioning position.

[0032] In some embodiments, one of the split pressure plates is configured as a pole piece pressure plate, one of the pole piece pressure plate and the positioning surface is formed with a positioning protrusion, and the other is formed with a matching recess, and the positioning protrusion is plugged into the matching recess;

[0033] The pole piece pressing portion is formed on the pole piece pressing plate.

[0034] Among them, through the plug-in cooperation between the positioning protrusion and the matching recess, the correct installation position of the pole piece pressure plate can be quickly found, which is beneficial to improving the positioning and installation efficiency of the pole piece.

[0035] In a second aspect, the present application also proposes a tab welding device, which includes the above-mentioned positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0037] Figure 1 A schematic structural diagram of an embodiment of a positioning fixture provided in the present application;

[0038] Figure 2 for Figure 1 A structural diagram of the middle base from one perspective;

[0039] Figure 3 for Figure 1 A schematic diagram of the structure of the middle split pressure plate (ear pressure plate) from one perspective;

[0040] Figure 4 for Figure 1 Schematic diagram of the structure of the middle split pressure plate (pole pressure plate) from one perspective.

[0041] Description of Figure Numbers:

[0042] 100, positioning fixture; 200, pole ear; 300, pole piece;

[0043] 1. Base; 11. Make way channel; 12. Tab positioning groove; 13. Pole piece positioning groove; 14. Limiting hole; 15. Matching recess; 2. Press plate structure; 21. Split pressing plate; 211. Tab pressing plate; 211a. Lifting end; 211b. Connecting end; 2111. Limiting convex part; 2112. Tab pressing part; 212. Pole piece pressing plate; 2121. Positioning convex part; 2122. Pole piece pressing part; 3a. Accommodating groove;

[0044] X, first direction; Y, second direction; Z, third direction.

[0045] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] In the production process of solid-state batteries, ultrasonic welding of pole tabs is an important process. The manual ultrasonic welding process requires operators to complete the operation in a glove box. During the welding process, operators need to manually place the pole piece and the pole tab and keep pressing so that the pole piece and the pole tab overlap and are positioned in the welding area. This increases the difficulty of manual operation in the welding process. It is difficult to achieve accurate positioning of the pole piece and the pole tab manually, which leads to misalignment and offset when welding the pole piece and the pole tab, affecting the welding quality. In addition, manual pressing and positioning requires manpower and has low operating efficiency.

[0054] Analysis of the above problems shows that the manual ultrasonic welding process requires manual pressure to hold the pole piece and the pole piece. The uncertainty of manual operation is the main reason for the poor positioning accuracy of the pole piece and the pole piece. There are currently some technical solutions to this problem. For example, a jig is set to position and load the pole piece and the pole piece. However, these technical solutions generally have a problem, that is, the jig can only limit the movement of the pole piece and the pole piece in the horizontal direction. In the process of welding the pole piece and the pole piece by the ultrasonic welding head, the pole piece and the pole piece often move due to the lack of pressure and limit, which will also cause misalignment and offset of the pole piece and the pole piece.

[0055] In view of the above situation, the present application proposes a positioning fixture with a pressure plate structure, which aims to improve the problem of poor positioning accuracy caused by manual pressing of the pole ear and the pole piece during the above ultrasonic welding of the pole ear.

[0056] To facilitate understanding of the positioning fixture provided by the present application, the following is a description with reference to the accompanying drawings, wherein: Figure 1 A schematic structural diagram of an embodiment of a positioning fixture provided in the present application; Figure 2 for Figure 1 A structural diagram of the middle base from one perspective; Figure 3 for Figure 1 A schematic diagram of the structure of the middle split pressure plate (ear pressure plate) from one perspective; Figure 4 for Figure 1 Schematic diagram of the structure of the middle split pressure plate (pole pressure plate) from one perspective.

[0057] See also Figure 1In one embodiment of the present application, the positioning fixture 100 is used for welding the pole ear 200 and the pole piece 300, and 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, and the positioning surface is formed with a pole ear positioning groove 12 and a pole piece positioning groove 13 that are interconnected, so that the pole ear 200 and the pole piece 300 positioned therein partially overlap to form a welding point; the pressure plate structure 2 can be detachably installed on the base 1, and a pole ear pressing portion 2112 and a pole piece pressing portion 2122 are formed on the pressure plate structure 2, and the pole ear pressing portion 2112 and the pole piece pressing portion 2122 are respectively arranged corresponding to the pole ear positioning groove 12 and the pole piece positioning groove 13 to press the pole ear 200 and the pole piece 300 therein.

[0058] It should be noted that the "base 1" is the main loading component of the positioning fixture 100, and its function is not only to position the pole ear 200 and the pole piece 300, but also to connect to the working platform of the pole ear welding equipment; "the base 1 has a positioning surface on one side of the first direction X", and the first direction X usually refers to the thickness direction of the base 1, and may also refer to other directions of the base 1; wherein, the "positioning surface" can usually be understood as a plane, but it may also be a step surface. In short, the positioning surface is formed with interconnected pole ear positioning grooves 12 and pole piece positioning grooves 13, and the pole ear positioning grooves 12 and the pole piece positioning grooves 13 are connected to each other. The connection direction (or relative direction) of the positioning groove 13 can be any direction within the positioning surface; the pole lug positioning groove 12 can position the pole lug 200 to be welded, and the pole piece positioning groove 13 can position the pole piece 300 to be welded. Since the pole lug positioning groove 12 and the pole piece positioning groove 13 are connected to each other, it is worth mentioning that the connection position of the pole lug positioning groove 12 on the pole piece positioning groove 13 corresponds to the position of the pole piece positioning groove 13 where the part to be welded on the pole piece 300 (the foil pole lug 200) can be revealed, so that the parts to be welded of the pole lug 200 and the pole piece 300 can overlap with each other, thereby forming a point to be welded.

[0059] The "pressing plate structure 2" can be detachably installed on the base 1, and it includes at least two installation methods, one method includes that the pressing plate structure 2 can be removed from the base 1 as a whole, and the other method includes that one end of the pressing plate structure 2 is hinged to the base 1, and the other end is snap-connected to the base 1, and this embodiment does not limit this; the pressing plate structure 2 can be arranged in an integral manner, or it can be arranged separately corresponding to the pole ear positioning groove 12 and the pole piece positioning groove 13, and this embodiment does not limit this; "a pole ear pressing portion 2112 and a pole piece pressing portion 2122 are formed on the pressing plate structure 2", after the pressing plate structure 2 is installed on the base 1, the pole ear pressing portion 2112 can be aligned to the pole ear positioning groove 12, so as to press and fix the pole ear 200 therein, and the pole piece pressing portion 2122 can be aligned to the pole piece positioning groove 13, so as to press and fix the pole piece 300 therein, and it is worth mentioning that the pole ear pressing portion 2112 and the pole piece pressing portion 2122 can be set as a convex structure (for example Figure 3 and Figure 4 As shown in ), the pole ear pressing portion 2112 and the pole piece pressing portion 2122 may also be provided as a planar structure to perform a pressing action from the outside of the corresponding positioning groove (for example, when the thickness of the pole ear 200 and the pole piece 300 is greater than the depth of the corresponding positioning groove, they may be pressed and fixed from the outside).

[0060] The technical solution provided by the present application is that a tab positioning groove 12 and a pole piece positioning groove 13 are formed on the positioning surface of the base 1, which can respectively position and place the tab 200 and the pole piece 300, and at the same time, the tab positioning groove 12 and the pole piece positioning groove 13 are interconnected, so that the tab 200 and the pole piece 300 can partially overlap at the connected position, thereby forming a welding point to be welded, and the external welding component welds the welding point to connect the tab 200 and the pole piece 300; not only that, 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 a tab pressing portion 2 formed on it corresponding to the tab positioning groove 12 and the pole piece positioning groove 13. 112 and the pole piece pressing portion 2122, the pole ear pressing portion 2112 and the pole piece pressing portion 2122 can respectively press and position the pole ear 200 and the pole piece 300, thereby completely limiting the positions of the pole ear 200 and the pole piece 300. During the welding of the welding points by external welding components, the pole ear 200 and the pole piece 300 are not easy to deviate. The positioning fixture 100 proposed in the present application replaces the manual pressing method. After applying it to the ultrasonic pole ear welding equipment, it can improve the positioning accuracy of the pole ear 200 and the pole piece 300 during the ultrasonic welding process, ensure the welding quality, and at the same time reduce the labor intensity of the operators and improve the working efficiency.

[0061] Please refer to Figure 2 In some embodiments, a clearance channel 11 is formed through the base 1 along the first direction X at a position corresponding to the connection between the pole ear positioning groove 12 and the pole piece positioning groove 13 .

[0062] It should be noted that the "giving way channel 11" is formed at the connecting position of the pole ear positioning groove 12 and the pole piece positioning groove 13, and its main purpose is to expose the welding point formed by the partial overlap of the pole ear 200 and the pole piece 300 along the first direction X. The projection shape of the giving way channel 11 along the first direction X can be square or circular; the specific setting position of the giving way channel 11 can be in the pole ear positioning groove 12, or in the pole piece positioning groove 13 (for example Figure 1 and Figure 2 As shown), of course, it can also be in the pole ear positioning groove 12 and the pole piece positioning groove 13 at the same time, and this embodiment is not limited to this.

[0063] According to the above technical solution, due to the existence of the give way channel 11, the external welding components (such as ultrasonic welding heads) can approach the welding points of the pole ear 200 and the pole piece 300 from both sides of the base 1 along the first direction X, thereby reducing the impact of the welding process on the base 1 and increasing the range of selectable materials for processing the base 1. For example, the base 1 can be selected to be made of plastic material and formed by 3D printing.

[0064] In other embodiments, the base 1 may be formed of a high-strength material to replace the setting of the make way channel 11, and an external welding component (such as an ultrasonic welding head) may directly act on the welding point between the pole ear 200 and the pole piece 300, and use the base 1 to stop the welding point.

[0065] See also Figure 1 and Figure 2 In some embodiments, the tab positioning grooves 12 and the tab pressing portions 2112 are grouped correspondingly, and two groups are arranged along the second direction Y on the same side of the pole piece positioning grooves 13; the second direction Y intersects with the first direction X.

[0066] It should be noted that two pole ears 200, namely the positive pole ear and the negative pole ear, are usually required to be welded on the pole piece 300. Of course, the welding of the positive pole ear and the negative pole ear can be carried out in steps, but this will undoubtedly reduce the welding efficiency; the "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 pole ear positioning grooves 12 are provided, and their functions are to position the positive pole ear and the negative pole ear respectively; it can be understood that the two pole ear positioning grooves 12 are connected with the pole piece positioning groove 13, and the positive pole ear and the negative pole ear can respectively overlap with the part to be welded (foil pole ear) on the pole piece 300 at the corresponding connecting position; since the two pole ear positioning grooves 12 are arranged along the second direction Y on the same side of the pole piece positioning groove 13, it can be understood that on the pole piece 300 corresponding to the welding of the positioning fixture 100, the positive pole ear and the negative pole ear are on the same side.

[0067] According to the above technical solution, by setting two groups of tab positioning grooves 12 and tab pressing portions 2112 correspondingly, the positive tab and the negative tab can be pressed and fixed respectively. In this way, the positive tab and the negative tab can be welded and fixed in one welding process, thereby ensuring the welding efficiency of the tab 200.

[0068] In some embodiments, the pressure plate structure 2 and the base 1 are magnetically connected.

[0069] It should be noted that there are many combinations of magnetic connection methods. For example, two oppositely charged magnets can achieve magnetic connection, and a magnet and a metal that can be adsorbed by the magnet can also achieve magnetic connection. This embodiment only requires that the pressure plate structure 2 and the base 1 be connected by magnetic attraction, and does not limit its specific implementation method.

[0070] According to the above technical solution, by setting the pressure plate structure 2 and the base 1 as a magnetic connection, the pressure plate structure 2 can be quickly installed and disassembled to achieve rapid positioning of the pole ear 200 and the pole piece 300; not only that, the magnetic connection structure is usually simpler, which reduces the processing difficulty of the base 1 and the pressure plate structure 2. At the same time, the magnetic connection method has a higher reliability and a lower probability of abnormal connection while satisfying the premise of pressing and fixing the pole ear 200 and the pole piece 300.

[0071] In some of the embodiments, one of the pressure plate structure 2 and the base 1 is made of a metal that can be adsorbed by a magnet (such as iron), and the other one is provided with a magnet.

[0072] Please refer to Figures 2 to 4 In some embodiments, magnetic attraction parts are respectively provided on the pressure plate structure 2 and the base 1, and the two magnetic attraction parts are arranged to attract each other; a receiving groove 3a is provided on the pressure plate structure 2 and / or the base 1, and the corresponding magnetic attraction part is accommodated in the receiving groove 3a.

[0073] It should be noted that the above two parallel technical features "a receiving groove 3a is provided on the pressure plate structure 2" and "a receiving groove 3a is provided on the base 1" can be set either one or both. Obviously, the effect of setting them both is better. In this embodiment, the two magnetic suction parts can be magnets at the same time, or one can be a magnet and the other can be a metal that can be adsorbed by the magnet. Based on this, the material of the pressure plate structure 2 and the base 1 can be understood as anti-magnetic material, such as plastic material.

[0074] According to the above technical scheme, accommodating grooves 3a are respectively provided on the pressure plate structure 2 and the base 1, and the magnetic attraction part can be completely hidden in the corresponding accommodating grooves 3a, ensuring that the pressure plate structure 2 and the base 1 have sufficient contact area at the magnetic attraction point, thereby ensuring the stability of the connection; not only that, the two magnetic attraction parts are also provided with 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 pole ear pressing part 2112 and the pole piece pressing part 2122 on the pressure plate structure 2 are just aligned with the pole ear positioning groove 12 and the pole piece positioning groove 13 on the base 1 respectively. This magnetic attraction combination method improves the installation efficiency of the pressure plate structure 2.

[0075] See also Figure 1 In some embodiments, the pole ear positioning groove 12 and the pole piece positioning groove 13 are arranged along the third direction Z; the pressure plate structure 2 includes two split pressure plates 21 opposite to each other in the third direction Z, and the pole ear pressing portion 2112 and the pole piece pressing portion 2122 are respectively formed on the two split pressure plates 21.

[0076] It should be noted that "the third direction Z" refers to the direction within the positioning surface, that is, the direction intersecting with the first direction X; "the pole ear positioning groove 12 and the pole piece positioning groove 13 are arranged along the third direction Z" means that the pole ear positioning groove 12 and the pole piece positioning groove 13 are connected in the third direction Z; this embodiment defines that the pressure plate structure 2 includes two split pressure plates 21 opposite to each other in the third direction Z, and the pole ear pressing portion 2112 and the pole piece pressing portion 2122 are respectively formed on the two split pressure plates 21, therefore, the positioning of the pole ear 200 and the pole piece 300 can be carried out successively, and at the same time, the two split pressure plates 21 are opposite to each other in the third direction Z, so that the welding points of the pole ear 200 and the pole piece 300 can be exposed in the first direction X.

[0077] According to the above technical solution, by forming the pole ear pressing portion 2112 and the pole piece pressing portion 2122 on two split pressure plates 21 respectively, the pole ear 200 and the pole piece 300 can be positioned successively. For example, the pole piece 300 can be positioned stably first, and then the pole ear 200 can be positioned to partially overlap with the pole piece 300. During the positioning process of the pole ear 200, the pole ear 200 can be fine-tuned, which is beneficial to improving the positioning accuracy of the pole ear 200 and the pole piece 300.

[0078] Please refer to Figure 3 and Figure 4 In some embodiments, in the second direction Y intersecting with the third direction Z, the pole ear pressing portion 2112 and the pole piece pressing portion 2122 are respectively located in the middle of the corresponding split pressure plate 21; the two ends of the split pressure plate 21 along the second direction Y are respectively magnetically connected to the base 1.

[0079] It should be noted that the "third direction Z" and the "second direction Y" are two directions intersecting in the positioning surface, and intersect with the first direction X in pairs. For example, the third direction Z is the front-to-back direction, the second direction Y is the left-to-right direction, and the first direction X is the up-down direction.

[0080] According to the above technical solution, since the pole ear pressing portion 2112 and the pole piece pressing portion 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 transmit it to the corresponding pole ear pressing portion 2112 or the pole piece pressing portion 2122 in the middle thereof, thereby ensuring the stable clamping of the pole ear 200 and the pole piece 300 by the split pressure plate 21.

[0081] Please refer to Figure 3In some embodiments, one of the split pressure plates 21 is configured as a tab pressure plate 211, which has a lifting end 211a and a connecting end 211b in a second direction Y intersecting with a third direction Z, wherein 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; a tab pressing portion 2112 is formed on the tab pressure plate 211.

[0082] It should be noted that the above embodiment has explained the intersection relationship of the third direction Z, the second direction Y, and the first direction X, and this embodiment will not elaborate on this. One of the two split pressure plates 21 is set as the pole ear pressure plate 211, which means that the pole ear pressing portion 2112 is formed on the pole ear pressure plate 211, and the two ends of the pole ear pressure plate 211 along the second direction Y are respectively set as the lifting end 211a and the connecting end 211b, wherein there are many possible ways of 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, so that the lifting end 211a can 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 can 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.

[0083] According to the above technical solution, for the pole lug 200 which is usually small in area and thickness, by movably connecting the connecting end 211b of the pole lug pressure plate 211 to the base 1, the lifting end 211a of the pole lug pressure plate 211 can be lifted by a small amplitude along the first direction X, so that the pole lug 200 can be replaced conveniently, thereby ensuring the replacement efficiency of the pole lug 200.

[0084] For details on the specific movable connection between the connecting end 211b and the base 1, please refer to Figure 2 In some embodiments, a limiting hole 14 is formed on the positioning surface of the base 1, and the limiting hole 14 is elongated along the second direction Y; a limiting protrusion 2111 is formed on the connecting end 211b, and the limiting protrusion 2111 extends into the limiting hole 14 and is movable along the second direction Y in the limiting hole 14.

[0085] It should be noted that the limiting hole 14 is arranged in an elongated shape 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 adaptation connection between the limiting hole 14 and the limiting protrusion 2111, then the tab pressure 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 movably connected to the base 1).

[0086] According to the above technical scheme, under the premise that the connecting end 211b of the tab pressure plate 211 can be restricted by the limiting hole 14 and maintained 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 simply connecting the limiting protrusion 2111 with 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 conducive to maintaining the position of the connecting end 211b in the third direction Z.

[0087] Please refer to Figure 3 In some embodiments, the limiting protrusion 2111 is arranged in an elongated shape along the second direction Y.

[0088] It should be noted that the limiting hole 14 is elongated along the second direction Y, the limiting protrusion 2111 is also elongated along the second direction Y, and the limiting protrusion 2111 is movable along the second direction Y in the limiting hole 14, which 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 equivalent to the size of the limiting hole 14 along the third direction Z.

[0089] According to the above technical solution, by setting the limiting protrusion 2111 in an elongated shape along the second direction Y, combined with the matching relationship between the limiting protrusion 2111 and the limiting hole 14, the limiting protrusion 2111 can only adapt to the movement of the lifting end 211a in the limiting hole 14 along the axis of the third direction Z. Under the limiting stop action of the hole wall of the limiting hole 14, the limiting protrusion 2111 is difficult to rotate along the axis of the first direction X, so that the rotational freedom of the connecting end 211b is limited, which is conducive to the rapid return of the pole ear pressure plate 211 to the installation positioning position.

[0090] Please refer to Figure 4 In some embodiments, one of the split pressure plates 21 is configured as a pole piece pressure plate 212, and the pole piece pressure plate 212 and one of the positioning surfaces form a positioning protrusion 2121, and the other forms a matching recess 15, and the positioning protrusion 2121 is inserted into the matching recess 15; the pole piece holding portion 2122 is formed on the pole piece pressure plate 212.

[0091] It should be noted that "a positioning protrusion 2121 is formed on one of the pole piece pressure plate 212 and the positioning surface, and a matching recess 15 is formed on the other" includes two situations. One is that the pole piece pressure plate 212 is formed with the positioning protrusion 2121, and the positioning surface is formed with the matching recess 15. The other is that the pole piece pressure plate 212 is formed with the matching recess 15, and the positioning surface is formed with the positioning protrusion 2121. The positioning protrusion 2121 usually includes a positioning pin, and the matching recess 15 usually includes a matching groove.

[0092] According to the above technical solution, the correct installation position of the pole piece pressure plate 212 can be quickly found through the plug-in fit between the positioning protrusion 2121 and the matching recess 15, which is beneficial to improving the positioning and installation efficiency of the pole piece 300.

[0093] Further, in some embodiments, see 2 and Figure 4 The positioning protrusions 2121 and the matching recesses 15 are grouped in a one-to-one correspondence, and two groups are arranged at both ends of the pole piece pressure plate 212 along the second direction Y.

[0094] The present application also proposes a tab welding device, which includes a positioning fixture 100. The specific structure of the positioning fixture 100 refers to the above embodiment. Since the tab welding device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the tab welding device includes but is not limited to ultrasonic welding equipment and laser welding equipment.

[0095] The present application proposes a positioning fixture 100 for welding a pole ear 200 and a pole piece 300, the positioning fixture 100 comprising a base 1 and a pressure plate structure 2, a positioning surface being formed on the base 1 on one side of a first direction X, the positioning surface being formed with a clearance channel 11 penetrating along the first direction X, two pole ear positioning grooves 12 arranged along a second direction Y, and a pole piece positioning groove 13 arranged along a third direction Z relative to the two pole ear positioning grooves 12, the pole piece positioning groove 13 and the two pole ear positioning grooves 12 being respectively connected to the clearance channel 11, the pressure plate structure 2 comprising two split pressure plates 21, the two ends of the two split pressure plates 21 along the second direction Y being respectively magnetically connected to the base 1, the two split pressure plates 21 comprising a pole ear pressure plate 211 and a pole piece pressure plate 212, and pole ear pressing portions 2112 and pole piece pressing portions 2122 are respectively formed in the middle of the pole ear pressure plate 211 and the pole piece pressure plate 212 corresponding to the pole ear positioning groove 12 and the pole piece positioning groove 13.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A positioning fixture for welding a pole ear and a pole piece, characterized in that: The positioning fixture comprises: A base having a positioning surface on one side of the first direction, wherein the positioning surface is formed with a pole ear positioning groove and a pole piece positioning groove that are interconnected, so that the pole ear and the pole piece positioned therein partially overlap to form a point to be welded; and, The pressing plate structure is detachably mounted on the base, and is formed with a pole ear pressing portion and a pole piece pressing portion, and the pole ear pressing portion and the pole piece pressing portion are respectively arranged corresponding to the pole ear positioning groove and the pole piece positioning groove to press the pole ear and the pole piece therein.

2. The positioning fixture according to claim 1, characterized in that: Corresponding to the communicating position between the pole ear positioning groove and the pole piece positioning groove, the base is penetrated along the first direction to form a clearance channel.

3. The positioning fixture according to claim 1, characterized in that: The tab positioning grooves and the tab pressing portions are grouped correspondingly, and two groups are arranged along the second direction on the same side of the pole piece positioning grooves; The second direction intersects the first direction.

4. The positioning fixture according to claim 1, characterized in that: The pressure plate structure is magnetically connected to the base.

5. The positioning fixture according to claim 4, characterized in that: The pressure plate structure and the base are respectively provided with magnetic attraction parts, and the two magnetic attraction parts are arranged to attract each other; The pressing plate structure and / or the base are provided with a receiving groove, and the corresponding magnetic attraction part is received in the receiving groove.

6. The positioning fixture according to any one of claims 1 to 5, characterized in that: The pole ear positioning groove and the pole piece positioning groove are arranged along a third direction; The pressure plate structure includes two split pressure plates that are opposite to each other in the third direction, and the pole tab pressing portion and the pole piece pressing portion are respectively formed on the two split pressure plates.

7. The positioning fixture according to claim 6, characterized in that: In a second direction intersecting with the third direction, the pole ear pressing portion and the pole piece pressing portion are respectively located in the middle of the corresponding split pressing plate; Two ends of the split pressing plate along the second direction are respectively magnetically connected to the base.

8. The positioning fixture according to claim 6, characterized in that: One of the split pressure plates is configured as a tab pressure plate, the tab 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 liftable and movable along the first direction; The tab pressing portion is formed on the tab pressing plate.

9. The positioning fixture according to claim 8, characterized in that: A limiting hole is formed on the positioning surface of the base, and the limiting hole is arranged in an elongated shape along the second direction; The connection end forms a limiting protrusion, the limiting protrusion extends into the limiting hole and is movable in the limiting hole along the second direction.

10. The positioning fixture according to claim 9, characterized in that: The limiting protrusion is arranged in an elongated shape along the second direction.

11. The positioning fixture according to claim 6, characterized in that: One of the split pressure plates is set as a pole piece pressure plate, one of the pole piece pressure plate and the positioning surface is formed with a positioning protrusion, and the other is formed with a matching recess, and the positioning protrusion is plugged into the matching recess; The pole piece pressing portion is formed on the pole piece pressing plate.

12. A tab welding device, characterized in that: Comprising a positioning fixture as described in any one of claims 1 to 11.

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