Welding jig

Abstract

The embodiment of the utility model provides a welding jig which comprises a base and two side plates, and the base is used for fixing a battery pack; the two side plates are arranged on the two sides, in the second direction, of the base and detachably connected with the base, the battery pack comprises an electric connecting piece, at least part of the electric connecting piece protrudes out of the surface of the battery pack in the first direction, and protruding blocks are arranged on the sides, close to the base, of the side plates and used for abutting against the electric connecting piece; when the side plate moves in the second direction and is connected to the base, the protruding block abuts against and applies pressure to the electric connecting piece so that the electric connecting piece can be bent. According to the welding jig, the protruding blocks are arranged and can abut against the electric connecting pieces and apply pressure to the electric connecting pieces, so that the electric connecting pieces are bent, in other words, shaping of the electric connecting pieces can be achieved through the welding jig, an independent electric connecting piece shaping process does not need to be added, the production process of the battery pack can be simplified, and the production efficiency of the battery pack is improved. And the production efficiency of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a welding jig. BACKGROUND

[0002] Lithium ion batteries are widely used in portable electronic devices, electric vehicles, electric tools, energy storage devices and other fields due to their advantages of high energy density and good cycle performance. A battery pack usually includes a plurality of lithium ion batteries (i.e. battery cells), and the production process of the battery pack is roughly as follows: first, a plurality of battery cells are welded into a battery pack through an electric connecting sheet (such as a nickel sheet); and then, a protection plate is welded with the electric connecting sheet to form a battery pack.

[0003] In the prior art, in order to facilitate the welding of the protection plate and the electric connecting sheet, a special shaping device is usually used to shape the electric connecting sheet before welding, so that the electric connecting sheet is bent towards the direction of the protection plate. However, the addition of a separate electric connecting sheet shaping process will complicate the production process of the battery pack and affect the production efficiency of the battery pack. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a welding jig to solve the problem that the prior art needs to add a separate electric connecting sheet shaping process before welding the protection plate and the electric connecting sheet, which complicates the production process of the battery pack and affects the production efficiency of the battery pack.

[0005] To solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the application discloses a welding jig, which comprises a base and two side plates, the base has a first direction and a second direction intersecting each other;

[0007] The base is used to fix a battery pack;

[0008] The two side plates are arranged on both sides of the base along the second direction and are detachably connected to the base, the battery pack includes an electric connecting sheet, at least part of the electric connecting sheet protrudes on the surface of the battery pack along the first direction, and the side plate is provided with a protrusion on the side close to the base, the protrusion is used to abut against the electric connecting sheet;

[0009] When the side plate is moved along the second direction and connected to the base, the protrusion abuts against and applies pressure to the electric connecting sheet, so that the electric connecting sheet is bent.

[0010] Optionally, the side plate comprises a connecting plate and a supporting plate connected to each other;

[0011] The connecting plate is detachably connected to the base;

[0012] The support plate is provided with an opening on the side facing away from the connecting plate, and the protruding block is arranged in the opening.

[0013] Optionally, the opening has a bottom wall perpendicular to the second direction, and the protruding block is connected to the bottom wall.

[0014] The size of the opening along the second direction is greater than the size of the protruding block along the second direction.

[0015] Optionally, the side plate is provided with a first suction member on the side close to the base.

[0016] The base is provided with a second suction member at the corresponding position of the first suction member, and the second suction member is attracted to the first suction member.

[0017] Optionally, the welding jig further comprises a cover plate arranged along the first direction and connected to the base.

[0018] The cover plate is provided with a first window, so that at least part of the electric connecting piece extends into the first window.

[0019] Optionally, the cover plate is further provided with a limiting part on both sides along the second direction, and the limiting part abuts against the side of the side plate facing away from the base to limit the movement of the side plate along the second direction.

[0020] Optionally, the welding jig further comprises a pressing structure arranged above the cover plate.

[0021] The pressing structure comprises a pressing jaw for extending into the first window to press the electric connecting piece.

[0022] Optionally, the pressing structure further comprises a frame and a telescopic assembly.

[0023] The pressing jaw is fixedly connected to the telescopic assembly.

[0024] The telescopic assembly is movably connected to the frame along the first direction, so that the pressing jaw telescopes relative to the frame along the first direction.

[0025] Optionally, the frame comprises a fixed plate and a guide rail connected to the fixed plate and extending along the first direction.

[0026] The telescopic assembly comprises a sliding block, a guide rod and a spring, the sliding block and the guide rod are arranged along the first direction and connected to each other, the guide rod is movably connected to the fixed plate along the first direction, the sliding block is slidingly connected to the guide rail along the first direction, and the sliding block is fixedly connected to the pressing jaw.

[0027] The spring sleeve is arranged on the guide rod, and two ends of the spring are respectively in abutment with the sliding block and the fixed plate.

[0028] Optionally, the telescopic assembly further comprises a pressing jaw fixing block and a position adjusting member.

[0029] The pressing jaw fixing block is arranged between the sliding block and the pressing jaw, and the position adjusting member is used for connecting and adjusting the relative positions of the pressing jaw fixing block, the sliding block and the pressing jaw.

[0030] In the embodiment of the present application, the side plate is provided, and the side plate is provided with a protrusion on the side close to the base. In this way, when the protection plate is arranged above the battery pack, during the assembly process of the welding jig, i.e. during the process that the side plate is moved along the second direction and connected to the base, the protrusion on the side plate can abut against and apply pressure to the electrical connection piece of the battery pack, so that the electrical connection piece is bent in the direction of the protection plate, thereby realizing the shaping of the electrical connection piece, so as to facilitate the subsequent welding of the electrical connection piece and the protection plate. Compared with the prior art, the welding jig of the embodiment of the present application can realize the shaping of the electrical connection piece, without the need to increase a separate electrical connection piece shaping process, thereby simplifying the production process of the battery pack and facilitating the improvement of the production efficiency of the battery pack.

[0031] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is a structural schematic diagram of a welding jig provided by the embodiment of the present application;

[0034] Figure 2 is an assembly schematic diagram of a base, a battery pack, a profiling support and a protection plate provided by the embodiment of the present application;

[0035] Figure 3 is one of structural schematic diagrams of a base of a welding jig provided by the embodiment of the present application;

[0036] Figure 4 is another structural schematic diagram of a base of a welding jig provided by the embodiment of the present application;

[0037] Figure 5 is one of structural schematic diagrams of a side plate of a welding jig provided by the embodiment of the present application;

[0038] Figure 6 is a structure schematic view of a side plate of a welding jig provided by an embodiment of the present application;

[0039] Figure 7 is a structure schematic view of a cover plate of a welding jig provided by an embodiment of the present application;

[0040] Figure 8 is a structure schematic view of a cover plate of a welding jig provided by an embodiment of the present application;

[0041] Figure 9 is a structure schematic view of a pressing structure of a welding jig provided by an embodiment of the present application;

[0042] Figure 10 is a structure schematic view of a telescopic assembly of a pressing structure provided by an embodiment of the present application;

[0043] Figure 11 is a structure schematic view of a telescopic assembly of a pressing structure provided by an embodiment of the present application.

[0044] Fig. 1 is a perspective view of a welding jig provided by an embodiment of the present application; Fig. 2 is a structure schematic view of a side plate of a welding jig provided by an embodiment of the present application; Fig. 3 is a structure schematic view of a cover plate of a welding jig provided by an embodiment of the present application; Fig. 4 is a structure schematic view of a pressing structure of a welding jig provided by an embodiment of the present application; Fig. 5 is a structure schematic view of a telescopic assembly of a pressing structure provided by an embodiment of the present application; Fig. 6 is a structure schematic view of a telescopic assembly of a pressing structure provided by an embodiment of the present application; 1. base, 11. body, 12. profiling groove, 13. avoiding area, 14. first mounting hole, 15. first positioning hole, 16. second mounting hole, 17. second positioning hole, 18. fool-proof groove, 2. side plate, 21. connecting plate, 22. support plate, 221. protruding block, 222. opening, 23. handle, 24. third mounting hole, 25. third positioning hole, 3. cover plate, 31. first window, 32. limiting part, 33. fourth mounting hole, 34. fourth positioning hole, 4. pressing structure, 41. pressing claw, 411. through hole, 42. frame, 421. fixing plate, 4211. second window, 422. guide rail, 43. telescopic assembly, 431. sliding block, 432. guide rod, 433. pressing claw fixing block, 434. position adjusting piece, 5. battery pack, 51. electric connecting sheet, 6. protection plate, 61. bumping sheet, 7. profiling support, X. first direction, Y. second direction, Z. third direction. DETAILED DESCRIPTION

[0045] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0047] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The present application provides a kind of welding fixture, the welding fixture of the present application is described in detail below with reference to the drawings.

[0050] Referring to Figure 1 , a structure schematic view of a welding fixture provided by an embodiment of the present application is shown, referring to Figure 2 , an assembly schematic view of a base, a battery pack, a profiling support and a protective plate provided by an embodiment of the present application is shown, referring to Figures 3-4 , a structure schematic view of the base of a welding fixture provided by an embodiment of the present application is shown, referring to Figures 5-6 , a structure schematic view of the side plate of a welding fixture provided by an embodiment of the present application is shown, referring to Figures 7-8 , a structure schematic view of the cover plate of a welding fixture provided by an embodiment of the present application is shown, referring to Figure 9 , a structure schematic view of the compression structure of a welding fixture provided by an embodiment of the present application is shown, referring to Figures 10-11 , a structure schematic view of the telescopic assembly of the compression structure provided by an embodiment of the present application is shown.

[0051] As shown in Figures 1-2 The present application provides a welding jig, comprising: a base 1 and two side plates 2, the base 1 has a first direction X and a second direction Y intersecting; the base 1 is used for fixing a battery pack 5; the two side plates 2 are arranged on both sides of the base 1 along the second direction Y and are detachably connected with the base 1, the battery pack 5 comprises an electric connecting piece 51, at least part of the electric connecting piece 51 protrudes on the surface of the battery pack 5 along the first direction X, the side plate 2 is provided with a protrusion 221 on the side close to the base 1, the protrusion 221 is used for abutting against the electric connecting piece 51; in the case that the side plate 2 is moved along the second direction Y and connected to the base 1, the protrusion 221 abuts against and applies pressure to the electric connecting piece 51, so that the electric connecting piece 51 is bent.

[0052] In the embodiment of the present application, the side plate 2 is arranged, and the protrusion 221 is arranged on the side of the side plate 2 close to the base 1. In this way, when the protection plate 6 is arranged above the battery pack 5, during the assembly process of the welding jig, i.e. during the process that the side plate 2 is moved along the second direction Y and connected to the base 1, the protrusion 221 on the side plate 2 can abut against and apply pressure to the electric connecting piece 51 of the battery pack 5, so that the electric connecting piece 51 is bent towards the direction of the protection plate 6, thereby realizing the shaping of the electric connecting piece 51, so as to facilitate the subsequent welding of the electric connecting piece 51 and the protection plate 6. Compared with the prior art, the welding jig of the embodiment of the present application can realize the shaping of the electric connecting piece 51, without the need to increase a separate electric connecting piece 51 shaping process, thereby simplifying the production process of the battery pack and facilitating the improvement of the production efficiency of the battery pack.

[0053] It should be noted that the first direction X, the second direction Y and the third direction Z of the embodiment of the present application can be perpendicular to each other. Specifically, the first direction X (i.e. the X-axis direction) refers to the height direction of the base 1, the second direction Y (i.e. the Y-axis direction) refers to one of the width direction or the length direction of the base 1, and the third direction Z (i.e. the Z-axis direction) refers to the other one of the width direction or the length direction of the base 1, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0054] In specific applications, taking a battery pack with a half-bracket structure as an example, as shown in Figure 2As shown, the battery pack usually comprises: the battery pack 5, the protection plate 6, and the bracket, the battery pack 5 and the protection plate 6 are sequentially arranged from bottom to top along the first direction X, and the bracket is arranged between the battery pack 5 and the protection plate 6. Among them, the bracket can support the battery pack 5 and the protection plate 6, which is conducive to improving the overall structural strength of the battery pack. In one of the embodiments, the bracket is a profiled bracket 7, the side of the profiled bracket 7 close to the battery pack 5 is provided with a mounting groove similar to the shape of the battery pack 5, and at least part of the battery pack 5 is embedded in the mounting groove. In this way, the battery cells of the battery pack 5 can be limited, thereby avoiding the problem of the battery pack 5 being scattered during long-term use.

[0055] In actual application, the side of the protection plate 6 away from the bracket is provided with a bump piece 61. The battery pack 5 comprises battery cells and an electric connecting piece 51 which are welded with each other, and at least part of the electric connecting piece 51 protrudes from the surface of the battery pack 5 along the first direction X, so that the electric connecting piece 51 is welded with the bump piece 61 of the protection plate 6 located above the battery pack 5, thereby realizing reliable connection between the battery pack 5 and the protection plate 6. Among them, the battery cells are provided with electrode terminals at both ends along the second direction Y, and the electric connecting piece 51 is specifically welded with the electrode terminals.

[0056] In some optional embodiments of the present application, as shown in Figure 3 The base 1 comprises a body 11, a profiled groove 12 and a avoiding area 13, the profiled groove 12 is arranged on the side of the body 11 close to the battery pack 5, and the avoiding area 13 is arranged at both ends of the profiled groove 12 along the second direction Y. In this way, since the profiled groove 12 is arranged, at least part of the battery pack 5 is embedded in the profiled groove 12, so that the battery cells of the battery pack 5 can be limited. Since the avoiding area 13 is arranged, the electrode terminals of the battery cells can be avoided, so that the electrode terminals are welded with the electric connecting piece 51. In addition, in actual application, the welding jig usually needs to be placed at a specific position (such as a welding platform) of the existing welding equipment, so as to facilitate subsequent welding work. As shown in Figure 4 In order to accurately install the welding jig on the welding platform, the side of the base 1 away from the battery pack 5 is provided with a fool-proof groove 18 extending along the third direction Z, and the fool-proof groove 18 is matched with the fool-proof block of the welding platform, so as to realize accurate positioning of the welding jig.

[0057] In some optional embodiments of the present application, as shown in Figures 5-6 The side plate 2 comprises: a connecting plate 21 and a supporting plate 22 connected with each other; the connecting plate 21 is detachably connected with the base 1; the side of the supporting plate 22 away from the connecting plate 21 is provided with an opening 222, and a protruding block 221 is arranged in the opening 222.

[0058] In the welding jig assembly process, the worker will first assemble the side plate 2 and the base 1 (including the battery pack 5 and the support); Then place the protection plate 6 above the battery pack 5, so that the contact piece 61 of the protection plate 6 corresponds to the protruding electrical connecting piece 51. Based on this, because the connecting plate 21 is arranged, through the detachable connection of the connecting plate 21 and the base 1, the convenient disassembly of the side plate 2 and the base 1 can be realized. Because the support plate 22 is arranged, the support plate 22 can assist in supporting the protection plate 6, avoiding the problem of deformation or even fracture of the protection plate 6 in the subsequent welding process. Because the support plate 22 is provided with an opening 222, and the protruding block 221 is arranged in the opening 222. In this way, in the process of assembling the side plate 2 to the base 1 along the second direction Y, when the electrical connecting piece 51 corresponds to the position of the opening 222, that is, the support plate 22 can avoid the electrical connecting piece 51, so that the electrical connecting piece 51 passes through the support plate 22 to connect with the protection plate 6 above the support plate 22. At the same time, the protruding block 221 located in the opening 222 can exert pressure on the electrical connecting piece 51, so that the electrical connecting piece 51 is bent towards the direction of the protection plate 6, thereby realizing the shaping of the electrical connecting piece 51.

[0059] It should be noted that the number of the electrical connecting piece 51 of the battery pack 5 and the contact piece 61 of the protection plate 6 in the embodiment of the application is consistent and the positions are opposite. By welding one electrical connecting piece 51 and one contact piece 61, the reliable connection of the battery pack 5 and the protection plate 6 can be realized. The number and position of the electrical connecting piece 51 and the contact piece 61 are not limited in the embodiment of the application, and those skilled in the art can adjust them according to actual needs. It can be understood that the total number of the openings 222 on all the support plates 22 is consistent with the number of the electrical connecting pieces 51 of the battery pack 5 and the positions are opposite, and one protruding block 221 is arranged in one opening 222. By abutting one protruding block 221 and one electrical connecting piece 51, the corresponding electrical connecting piece 51 is bent towards the direction of the protection plate 6.

[0060] In some optional embodiments of the application, the opening 222 has a bottom wall perpendicular to the second direction Y, and the protruding block 221 is connected to the bottom wall; the size of the opening 222 along the second direction Y is greater than the size of the protruding block 221 along the second direction Y. In this way, the side of the protruding block 221 close to the electrical connecting piece 51 can form an avoiding space, so as to avoid the electrical connecting piece 51, so that the electrical connecting piece 51 passes through the support plate 22 to connect with the protection plate 6 above the support plate 22.

[0061] It should be noted that the protrusion 221 has an abutting surface facing away from the connecting plate 21, and the abutting surface is used to abut against the electric connecting sheet 51. The abutting surface includes a first edge and a second edge arranged away from each other along the first direction X, and the second edge is close to the base 1. The abutting surface of the embodiment of the present application can be a plane perpendicular to the second direction Y, or can be an inclined surface arranged at an angle with the second direction Y. Specifically, if the distance between the abutting surface and the bottom wall of the opening 222 along the second direction Y is a first distance, when the abutting surface is a plane, that is, the first distance along the direction from the first edge to the second edge is the same, the structure of the side plate 2 can be simplified, and the processing is facilitated. When the abutting surface is an inclined surface, that is, the first distance along the direction from the first edge to the second edge decreases, in this way, the contact area of the abutting surface and the electric connecting sheet 51 can be increased, so that the pressure can be better dispersed, and the shaping effect of the electric connecting sheet 51 can be improved.

[0062] In some optional embodiments of the present application, the side plate 2 is provided with a first suction member on the side close to the base 1; the base 1 is provided with a second suction member at the corresponding position of the first suction member, and the second suction member is attracted to the first suction member. In addition, the side plate 2 is provided with a handle 23 on the side away from the base.

[0063] In the embodiment of the present application, the first suction member and the second suction member are arranged at the corresponding positions of the side plate 2 and the base 1 respectively, and the reliable connection of the side plate 2 and the base 1 can be achieved through the attraction of the first suction member and the second suction member. Since the handle 23 is provided, a force point is provided for the worker, and by applying an action force to the handle 23 in the direction opposite to the attraction force of the first suction member and the second suction member, the side plate 2 can be quickly disassembled from the base 1.

[0064] It should be noted that one of the first suction member and the second suction member is a magnetic member, and the other is a magnetic member or a metal member, and the reliable connection of the welding plate and the frame 42 can be achieved through the mutual attraction of the magnetic member and the magnetic member, or the magnetic member and the metal member. In addition, the number of the first suction member and the second suction member is not limited in the embodiment of the present application, and the person skilled in the art can adjust according to the actual needs.

[0065] In one of the embodiments, the first suction member and the second suction member are both magnets. For example, Figure 3 and Figure 5As shown, the side plate 2 is provided with a third mounting hole 24 on the side close to the base 1, the base 1 is provided with a first mounting hole 14 on the body 11 corresponding to the third mounting hole 24, and two groups of magnets with magnetic attraction are arranged in the first mounting hole 14 and the third mounting hole 24 respectively, so that the side plate 2 and the base 1 can be reliably connected through the attraction of the two groups of magnets. In addition, the side plate 21 is also provided with a third positioning hole 25 on the side close to the base 1, and the base 1 is provided with a first positioning hole 15 on the body 11 corresponding to the third positioning hole 25. The welding jig further comprises a positioning member, such as a positioning pin. The positioning pin can be inserted into the third positioning hole 25 and the first positioning hole 15 to achieve precise assembly of the side plate 2 and the base 1. It should be noted that the number and arrangement of the first mounting hole 14, the third mounting hole 24, the first positioning hole 15 and the third positioning hole 25 are not limited in the present application, and can be adjusted by those skilled in the art according to actual needs. It can be understood that the first mounting hole 14 and the third mounting hole 24 should satisfy the same number and opposite positions, and the first positioning hole 15 and the third positioning hole 25 should satisfy the same number and opposite positions.

[0066] In some optional embodiments of the present application, as shown in Figures 7-8 The welding jig further comprises a cover plate 3, and the cover plate 3 and the base 1 are arranged along the first direction X and connected with each other. The cover plate 3 is provided with a first window 31, so that at least part of the electric connecting piece 51 extends into the first window 31.

[0067] During the assembly of the welding jig, the worker first assembles the side plate 2 and the base 1 (including the battery pack 5 and the bracket) together; then places the protection plate 6 above the battery pack 5, so that the contact piece 61 of the protection plate 6 corresponds to the protruding electric connecting piece 51; and finally arranges the cover plate 3 above the protection plate 6 and connects it with the base 1. Based on this, since the cover plate 3 is arranged, the cover plate 3 can play a protective role for the protection plate 6. In addition, since the first window 31 is arranged, at least part of the electric connecting piece 51 can extend into the first window 31, so as to facilitate the subsequent welding of the electric connecting piece 51 and the contact piece 61.

[0068] It should be noted that the number and position of the first window 31 are not limited in the present application, and can be adjusted by those skilled in the art according to actual needs. It can be understood that the first window 31 and the opening 222 should satisfy the same number and corresponding positions, so that the electric connecting piece 51 and the contact piece 61 to be welded can be exposed for subsequent welding.

[0069] In specific applications, as shown in Figure 3 and Figure 7As shown, the side of the cover plate 3 close to the base 1 is provided with a fourth mounting hole 33, the body 11 of the base 1 is provided with a second mounting hole 16 at a position corresponding to the fourth mounting hole 33, and two groups of magnets with magnetic attraction are arranged in the second mounting hole 16 and the fourth mounting hole 33, respectively. The reliable connection of the cover plate 3 and the base 1 can be achieved through the attraction of the two groups of magnets. In addition, the side of the cover plate 3 close to the base 1 is also provided with a fourth positioning hole 34, and the body 11 of the base 1 is provided with a second positioning hole 17 at a position corresponding to the fourth positioning hole 34. The welding jig further includes a positioning member, such as a positioning pin. The accurate assembly of the cover plate 3 and the base 1 can be achieved by inserting the positioning pin into the fourth positioning hole 34 and the second positioning hole 17. It should be noted that the number and arrangement of the second mounting hole 16, the fourth mounting hole 33, the second positioning hole 17 and the fourth positioning hole 34 are not limited in the embodiments of the present application, and can be adjusted according to actual needs by those skilled in the art. It can be understood that the second mounting hole 16 and the fourth mounting hole 33 should satisfy the same number and opposite positions, and the second positioning hole 17 and the fourth positioning hole 34 should satisfy the same number and opposite positions.

[0070] In some optional embodiments of the present application, the cover plate 3 is also provided with a limiting portion 32 on both sides along the second direction Y, and the limiting portion 32 abuts against the side of the side plate 2 away from the base 1 to limit the movement of the side plate 2 along the second direction Y. In this way, by arranging the limiting portion 32, the movement of the side plate 2 along the second direction Y can be limited, that is, the side plate 2 can be relatively fixed with the base 1, and the shift of the electric connecting sheet 51 and the bumping sheet 61 can be avoided, which is beneficial to improve the welding reliability of the electric connecting sheet 51 and the bumping sheet 61.

[0071] It should be noted that the number and arrangement of the limiting portion 32 are not limited in the embodiments of the present application, and can be adjusted according to actual needs by those skilled in the art. In one of the embodiments, two limiting portions 32 are arranged on both sides of the cover plate 3 along the second direction Y, and the two limiting portions 32 are arranged at intervals along the third direction Z.

[0072] In some optional embodiments of the present application, as shown in Figure 1 and Figure 9 The welding jig further includes a pressing structure 4 arranged above the cover plate 3. The pressing structure 4 includes a pressing jaw 41 arranged to extend into the first window 31 to press the electric connecting sheet 51. In this way, since the pressing structure 4 is arranged, the pressing jaw 41 of the pressing structure 4 can extend into the first window 31 to press the electric connecting sheet 51, so that the electric connecting sheet 51 and the bumping sheet 61 are tightly attached, which can effectively avoid the problem of virtual welding, and is beneficial to improve the welding reliability of the electric connecting sheet 51 and the bumping sheet 61.

[0073] It should be noted that the existing welding device also includes a cylinder, the cylinder is connected with the pressing structure 4, the cylinder is used to drive the pressing structure 4 to move up and down along the first direction X, and in the welding process, the cylinder drives the pressing structure 4 to press down, the pressing claw 41 extends into the first window 31 and contacts the electric connecting piece 51, and the electric connecting piece 51 is pressed on the upper side of the contact piece 61, so that the electric connecting piece 51 and the contact piece 61 can be tightly attached. In addition, the number and position of the pressing claw 41 are not limited in the embodiment of the application, and those skilled in the art can adjust them according to actual needs. It can be understood that the pressing claw 41 and the first window 31 should satisfy the same number and corresponding position, so as to realize multi-point welding, which is beneficial to improve the welding efficiency.

[0074] In some optional embodiments of the application, the pressing structure 4 further includes a frame 42 and a telescopic assembly 43; the pressing claw 41 is fixedly connected with the telescopic assembly 43; and the telescopic assembly 43 is movably connected with the frame 42 along the first direction X, so that the pressing claw 41 can be telescoped relative to the frame 42 along the first direction X.

[0075] In actual application, the cylinder is usually connected with the frame 42 of the pressing structure 4. Based on this, since the telescopic assembly 43 is arranged, the telescopic assembly 43 and the frame 42 are movably connected, and the pressing claw 41 is fixedly connected with the telescopic assembly 43, the telescopic assembly 43 can be telescoped relative to the frame 42. In this way, when the cylinder drives the frame 42 to press down, the telescoping of the pressing claw 41 relative to the frame 42 can realize buffering, so as to avoid damage to the protection plate 6.

[0076] In some optional embodiments of the application, as shown in Figure 10 The frame 42 includes a fixed plate 421 and a guide rail 422 connected with the fixed plate 421 and extending along the first direction X; the telescopic assembly 43 includes a sliding block 431, a guide rod 432 and a spring (not shown), the sliding block 431 and the guide rod 432 are arranged along the first direction X and are connected with each other, the guide rod 432 is movably connected with the fixed plate 421 along the first direction X, the sliding block 431 is slidingly connected with the guide rail 422 along the first direction X, and the sliding block 431 is fixedly connected with the pressing claw 41; the spring is sleeved on the guide rod 432, and two ends of the spring are respectively abutted with the sliding block 431 and the fixed plate 421, and under the elastic action of the spring, the sliding block 431 moves along the first direction X.

[0077] In the embodiment of the present application, the frame 42 and the telescopic assembly 43 are respectively provided with the guide rail 422 and the sliding block 431, and the sliding block 431 and the guide rail 422 are connected through sliding connection, so that the telescopic assembly 43 can move relative to the frame 42 along the first direction X. The guide rod 432 is arranged, and the guide rod 432 can guide the movement of the sliding block 431 along the first direction X, so that the stability of the telescopic assembly 43 moving along the first direction X can be improved. The spring is arranged, and the telescopic assembly 43 can move relative to the frame 42 along the first direction X through the extension and contraction of the spring, so that the telescopic movement of the pressing jaw 41 relative to the frame 42 can be realized. Specifically, when the frame 42 is driven by the air cylinder to be pressed downward, the pressing jaw 41 gradually extends into the first window 31 and presses the electric connecting sheet 51 downward in the direction of the bumping sheet 61, and when the electric connecting sheet 51 is attached to the bumping sheet 61 so that the pressing jaw 41 cannot continue to be pressed downward, the spring is contracted to provide a force opposite to the movement direction of the frame 42, so that the buffer is realized, the electric connecting sheet 51 and the bumping sheet 61 can be tightly attached without damaging the protective plate 6, and the welding reliability of the electric connecting sheet 51 and the bumping sheet 61 can be improved.

[0078] In a specific application, two fixed plates 421 are arranged, and the two fixed plates 421 are arranged at intervals along the first direction X, and the guide rail 422 is arranged between the two fixed plates 421. Among them, the fixed plate 421 close to the guide rod 432, that is, the upper fixed plate 421 is provided with a guide hole at the corresponding position of the guide rod 432, and the guide rod is arranged in the guide hole. When the spring is contracted, the guide rod moves relative to the guide hole along the first direction X to guide the sliding of the sliding block 431 relative to the guide rail 422 along the first direction X. In addition, when the electric connecting sheet 51 and the protective plate 6 are welded by laser welding, the fixed plate 421 is also provided with a second window 4211, and the second window 4211 is used to pass through the laser beam. The pressing jaw 41 is located in the range of the orthographic projection of the second window 4211 along the first direction X, so that the laser beam can reach the position of the pressing jaw 41 to realize the welding of the electric connecting sheet 51 and the bumping sheet 61. Among them, the pressing jaw 41 includes a pressing portion for pressing the electric connecting sheet 51, and the pressing portion is provided with a through hole 411, so that the laser beam can pass through and reach the electric connecting sheet 51, and then the reliable connection of the electric connecting sheet 51 and the bumping sheet 61 is realized.

[0079] It should be noted that the number and position of the telescopic assembly 43 are not limited in the embodiment of the present application, and those skilled in the art can adjust them according to actual needs. It can be understood that the telescopic assembly 43 and the pressing jaw 41 should satisfy the same number and relative position, and through the one-to-one corresponding connection of the telescopic assembly 43 and the pressing jaw 41, the pressing of all electric connecting sheets 51 can be realized at one time, which is beneficial to improve the welding efficiency.

[0080] In some optional embodiments of the present application, the telescopic assembly 43 further comprises a presser jaw fixing block 433 and a position adjusting member 434. The presser jaw fixing block 433 is arranged between the sliding block 431 and the presser jaw 41, and the position adjusting member 434 is used to connect and adjust the relative positions of the presser jaw fixing block 433, the sliding block 431 and the presser jaw 41. In this way, by arranging the position adjusting member 434, the fine adjustment of the position of the presser jaw 41 can be realized, and the accurate positioning of the presser jaw 41 can be realized, which is beneficial to improve the crimping reliability of the presser jaw 41 on the electrical connecting piece 51.

[0081] As Figures 10-11 For example, the position adjusting member 434 comprises a first limiting screw, a second limiting screw, a first waist-shaped hole and a second waist-shaped hole. Specifically, the first waist-shaped hole is arranged on the presser jaw fixing block 433, and the first limiting screw is arranged in the first waist-shaped hole and fixedly connected with the sliding block 431. The first waist-shaped hole is provided with two first waist-shaped holes, the two first waist-shaped holes are arranged in the third direction Z, and each first waist-shaped hole extends in the third direction Z. The second waist-shaped hole is arranged on the presser jaw 41, and the second limiting screw is arranged in the second waist-shaped hole and fixedly connected with the presser jaw fixing block 433. The second waist-shaped hole is provided with two second waist-shaped holes, the two second waist-shaped holes are arranged in the second direction Y, and each second waist-shaped hole extends in the second direction Y. In this way, the worker can loosen the first limiting screw, so that the presser jaw fixing block 433 can move relative to the sliding block 431 in the third direction Z. When the presser jaw fixing block 433 is adjusted to a preset position, the presser jaw fixing block 433 can be fixed relative to the sliding block 431 by tightening the first limiting screw. Similarly, the worker can loosen the first limiting screw, so that the presser jaw 41 can move relative to the presser jaw fixing block 433 in the second direction Y. When the presser jaw 41 is adjusted to a preset position, the presser jaw 41 can be fixed relative to the presser jaw fixing block 433 by tightening the first limiting screw. That is, by arranging the position adjusting member 434, the fine adjustment of the position of the presser jaw 41 in the second direction Y and the third direction Z can be realized, so that the accurate positioning of the presser jaw 41 can be realized.

[0082] In summary, the welding jig provided by the embodiments of the present application has at least the following advantages:

[0083] In the embodiment of the present application, the side plate is arranged, and the side plate is provided with the protrusion on the side close to the base. In this way, when the protection plate is arranged above the battery pack, during the assembly process of the welding jig, i.e. during the process that the side plate is moved along the second direction and connected to the base, the protrusion on the side plate can abut against and apply pressure to the electric connecting piece of the battery pack, so that the electric connecting piece is bent in the direction of the protection plate, thereby realizing the shaping of the electric connecting piece, so as to facilitate the subsequent welding of the electric connecting piece and the protection plate. Compared with the prior art, the welding jig of the embodiment of the present application can realize the shaping of the electric connecting piece, without the need to increase a separate electric connecting piece shaping process, so that the production process of the battery pack can be simplified, and the production efficiency of the battery pack can be improved.

[0084] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A soldering fixture, characterized by, The welding jig comprises a base (1) and two side plates (2), the base (1) has a first direction (X) and a second direction (Y) intersecting with each other; The base (1) is used for fixing a battery pack (5); Two side plates (2) are arranged on both sides of the base (1) along the second direction (Y) and are detachably connected with the base (1), the battery pack (5) comprises an electric connecting sheet (51), at least part of the electric connecting sheet (51) is arranged to protrude from the surface of the battery pack (5) along the first direction (X), and the side plate (2) is provided with a protruding block (221) on the side close to the base (1), the protruding block (221) is used for abutting against the electric connecting sheet (51); When the side plate (2) is moved along the second direction (Y) and connected to the base (1), the protruding block (221) abuts against and applies pressure to the electric connecting sheet (51), so that the electric connecting sheet (51) is bent.

2. The soldering fixture of claim 1, wherein, The side plate (2) comprises a connecting plate (21) and a supporting plate (22) connected with each other; The connecting plate (21) is detachably connected with the base (1); The supporting plate (22) is provided with an opening (222) on the side away from the connecting plate (21), and the protruding block (221) is arranged in the opening (222).

3. The soldering fixture of claim 2, wherein, The opening (222) has a bottom wall perpendicular to the second direction (Y), and the protruding block (221) is connected to the bottom wall; The size of the opening (222) along the second direction (Y) is greater than the size of the protruding block (221) along the second direction (Y).

4. The soldering fixture of claim 1, wherein, The side plate (2) is provided with a first suction member on the side close to the base (1); The base (1) is provided with a second suction member at the corresponding position of the first suction member, and the second suction member is attracted to the first suction member.

5. The soldering fixture of claim 1, wherein, The welding jig further comprises a cover plate (3), the cover plate (3) is arranged along the first direction (X) and connected with the base (1); The cover plate (3) is provided with a first window (31), so that at least part of the electric connecting sheet (51) extends into the first window (31).

6. The soldering fixture of claim 5, wherein, The cover plate (3) is further provided with a limiting part (32) on both sides along the second direction (Y), the limiting part (32) abuts against the side of the side plate (2) away from the base (1), so as to limit the movement of the side plate (2) along the second direction (Y).

7. The soldering fixture of claim 5, wherein, The welding jig further comprises a pressing structure (4), the pressing structure (4) is arranged above the cover plate (3); The pressing structure (4) comprises a pressing jaw (41), the pressing jaw (41) is used for extending into the first window (31) to press the electric connecting sheet (51).

8. The soldering fixture of claim 7, wherein, The pressing structure (4) further comprises a frame (42) and a telescopic assembly (43); The pressing jaw (41) is fixedly connected with the telescopic assembly (43); The telescopic assembly (43) is movably connected with the frame (42) along the first direction (X), so that the pressing jaw (41) is telescoped relative to the frame (42) along the first direction (X).

9. The soldering fixture of claim 8, wherein, The frame (42) comprises a fixed plate (421) and a guide rail (422) connected with the fixed plate (421) and extending along the first direction (X); The telescopic assembly (43) comprises a sliding block (431), a guide rod (432) and a spring, the sliding block (431) and the guide rod (432) are arranged along the first direction (X) and are connected with each other, the guide rod (432) is movably connected with the fixed plate (421) along the first direction (X), the sliding block (431) is slidably connected with the guide rail (422) along the first direction (X), and the sliding block (431) is fixedly connected with the pressing jaw (41); The spring is sleeved on the guide rod (432), and two ends of the spring abut against the sliding block (431) and the fixed plate (421) respectively, and under the elastic action of the spring, the sliding block (431) moves along the first direction (X).

10. The soldering fixture of claim 9, wherein, The telescopic assembly (43) further comprises a pressing jaw fixing block (433) and a position adjusting piece (434); The pressing jaw fixing block (433) is arranged between the sliding block (431) and the pressing jaw (41), and the position adjusting piece (434) is used for connecting and adjusting the relative positions of the pressing jaw fixing block (433), the sliding block (431) and the pressing jaw (41).

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