Positioning device, welding equipment and battery production line

Abstract

The utility model relates to the technical field of welding equipment, in particular to a positioning device, welding equipment and a battery production line. The positioning device comprises a bottom plate, a first vertical plate, a second vertical plate, a first positioning piece and a second positioning piece, the first vertical plate is arranged at one end of the bottom plate in the first direction, the second vertical plate is arranged at the other end of the bottom plate in the first direction, and the first positioning piece is arranged on the plate face, away from the bottom plate, of the first vertical plate in the first direction; the second positioning piece is arranged on the plate face, away from the bottom plate, of the second vertical plate in the first direction. Wherein the first vertical plate and the second vertical plate are configured to be used for positioning the clamping assembly in the first direction, and the first positioning piece and the second positioning piece are configured to be used for positioning the positioning device in the second direction. According to the positioning device for the welding equipment, the welding precision between the end plates and the side plates of the battery module can be improved, the occurrence of poor welding phenomena is reduced, and the complexity of the welding process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of welding equipment, and in particular to a positioning device, welding equipment and a battery production line. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The connection between the end plate and the side plate of the battery module of new energy vehicles is usually achieved by laser welding. The battery, end plate and side plate need to be assembled before welding. In order to ensure the welding quality, an assembly gap is set at the welding position of the end plate and the side plate.

[0004] In the actual production process, poor welding caused by the assembly gap between the end plate and the side plate requires repeated corrections after observing the welding effect, which makes the welding process complicated. Utility Model Content

[0005] In view of the defects of the prior art, the purpose of the present application is to provide a positioning device for welding equipment, welding equipment and a battery production line, which can effectively solve the problem of poor welding between the end plate and the side plate in the battery module.

[0006] In a first aspect, the present application provides a positioning device for positioning a clamping assembly of a welding device, the clamping assembly being used to clamp a workpiece to be welded, wherein the positioning device comprises:

[0007] Base plate;

[0008] A first vertical plate, the first vertical plate is arranged at one end of the bottom plate along a first direction;

[0009] A second vertical plate, the second vertical plate is arranged at the other end of the bottom plate along the first direction;

[0010] A first positioning member, the first positioning member is arranged along a first direction on a plate surface of the first vertical plate facing away from the bottom plate;

[0011] A second positioning member, the second positioning member is arranged along the first direction on a plate surface of the second vertical plate facing away from the bottom plate;

[0012] Among them, the first vertical plate and the second vertical plate are configured to position the clamping assembly along a first direction, and the first positioning member and the second positioning member are configured to position the positioning device along a second direction. The first direction is one of the length direction or the width direction of the base plate, and the second direction is the other of the length direction or the width direction of the base plate.

[0013] According to the positioning device of the present application, the clamping component of the welding equipment is positioned along the first direction by the first vertical plate and the second vertical plate, the positioning device is positioned along the second direction by the first positioning member and the second positioning member, and then the clamping component is positioned along the second direction by the positioned positioning device, so that the clamping component of the welding equipment is positioned along the first direction and the second direction respectively by the positioning device of the present application, and then after the positioning device is removed, the workpiece to be welded placed on the welding equipment can be positioned and clamped. When the workpiece to be welded is a battery module, the end plates at both ends of the battery module can be positioned and clamped along the first direction by the positioned clamping component, and at the same time, the side plates on both sides of the battery module can be clamped along the second direction by the positioned clamping component, so as to complete the positioning and clamping between the end plates and the side plates of the battery module, improve the assembly accuracy between the end plates and the side plates of the battery module, and then improve the welding accuracy between the end plates and the side plates of the battery module, reduce the occurrence of poor welding, and reduce the complexity of the welding process.

[0014] In some embodiments of the present application, along the first direction, the spacing between the plate surface of the first vertical plate facing away from the second vertical plate and the plate surface of the second vertical plate facing away from the first vertical plate is configured to be smaller than the length dimension of the to-be-welded part.

[0015] By setting the spacing between the surface of the first vertical plate facing away from the second vertical plate and the surface of the second vertical plate facing away from the first vertical plate to be smaller than the length of the workpiece to be welded, the clamping dimension of the clamping assembly along the first direction can be made smaller than the length of the workpiece to be welded. Therefore, when the positioning device is removed and the workpiece to be welded is placed on the welding equipment, the clamping assembly can clamp the workpiece to be welded along the first direction, thereby reducing the position deviation of the workpiece to be welded during the welding process.

[0016] In some embodiments of the present application, along the first direction, the spacing between the surface of the first vertical plate facing away from the second vertical plate and the surface of the second vertical plate facing away from the first vertical plate is configured to have a difference range of 0.1mm-1.0mm from the length dimension of the to-be-welded part.

[0017] The above-mentioned difference range enables the clamping assembly to clamp the workpiece to be welded along the first direction without causing excessive squeezing of the workpiece to be welded, thereby reducing damage to the workpiece to be welded.

[0018] In some embodiments of the present application, along the first direction, the first vertical plate and the second vertical plate are symmetrically arranged at both ends of the bottom plate, along the second direction, the size of the first vertical plate and the size of the second vertical plate are respectively greater than or equal to the size of the bottom plate, and the size of the first vertical plate and the size of the second vertical plate are respectively equal to the width size of the part to be welded.

[0019] By setting the size of the first vertical plate and the size of the second vertical plate to be equal to the width size of the workpiece to be welded, the positioning of the clamping assembly along the second direction is completed with the first vertical plate and the second vertical plate as a reference, that is, the positioning of the workpiece to be welded along the second direction by the clamping assembly is achieved, thereby positioning and clamping the workpiece to be welded along the second direction.

[0020] In some embodiments of the present application, a first marking structure and a second marking structure are provided on a plate surface of the first vertical plate facing away from the base plate along a first direction, and along a second direction, the first marking structure and the second marking structure are respectively provided on both sides of the first positioning member, and the positions of the first marking structure and the second marking structure on the first vertical plate are configured to be consistent with the position of the weld on one end face of the part to be welded.

[0021] By setting the positions of the first marking structure and the second marking structure on the first vertical plate to be consistent with the position of the weld on one end face of the workpiece to be welded, the positioning of the welding position along the second direction and the third direction is completed based on the first marking structure and the second marking structure, that is, the positioning of the weld on one end face of the workpiece to be welded along the second direction and the third direction is achieved, thereby improving the welding accuracy.

[0022] In some embodiments of the present application, a third marking structure and a fourth marking structure are provided on the plate surface of the second vertical plate facing away from the base plate along the first direction, and along the second direction, the third marking structure and the fourth marking structure are respectively provided on both sides of the second positioning member, and the positions of the third marking structure and the fourth marking structure on the second vertical plate are configured to be consistent with the position of the weld on the other end face of the part to be welded.

[0023] By setting the position of the third marking structure and the fourth marking structure on the second vertical plate to be consistent with the position of the weld on the other end face of the workpiece to be welded, the positioning of the welding position along the second direction and the third direction is completed with the third marking structure and the fourth marking structure as a reference, that is, the positioning of the weld on the other end face of the workpiece to be welded along the second direction and the third direction is achieved, thereby improving the welding accuracy.

[0024] In some embodiments of the present application, the first vertical plate is detachably connected to the bottom plate, and / or the second vertical plate is detachably connected to the bottom plate.

[0025] By connecting the first vertical plate and / or the second vertical plate to the base plate in a detachable manner, the first vertical plate, the second vertical plate and the base plate of different sizes can be replaced according to the size of the welded parts to be positioned and clamped, thereby improving the applicability of the positioning device.

[0026] In some embodiments of the present application, a first connecting member is further included, the first connecting member includes a first plate portion and a second plate portion arranged at an angle, the first plate portion is detachably connected to the base plate, and the second plate portion is detachably connected to the first vertical plate.

[0027] By providing the first connecting member, it is convenient to connect the bottom plate and the first vertical plate, and the connecting member with a plate-like structure can improve the connection strength between the bottom plate and the first vertical plate.

[0028] In some embodiments of the present application, a second connecting member is further included, the second connecting member includes a third plate portion and a fourth plate portion arranged at an angle, the third plate portion is detachably connected to the base plate, and the fourth plate portion is detachably connected to the second vertical plate.

[0029] The second connecting piece is provided to facilitate the connection between the bottom plate and the second vertical plate, and the connecting piece with a plate-like structure can improve the connection strength between the bottom plate and the second vertical plate.

[0030] In some embodiments of the present application, the first positioning member has a first positioning surface for positioning, the second positioning member has a second positioning surface for positioning, and the first positioning surface and the second positioning surface are in the same plane.

[0031] By arranging the first positioning surface and the second positioning surface in the same plane, the position of the positioning device along the second direction can be positioned by the first positioning surface and the second positioning surface, so that the position of the clamping assembly can be positioned along the second direction by the positioned positioning device.

[0032] In some embodiments of the present application, a third positioning member and a fourth positioning member are further included. The third positioning member is arranged on the board surface of the first vertical plate away from the bottom plate along the first direction, and is spaced apart from the first positioning member along the second direction. The fourth positioning member is arranged on the board surface of the second vertical plate away from the bottom plate along the first direction, and is spaced apart from the second positioning member along the second direction.

[0033] By arranging the first positioning member and the third positioning member together on the first vertical plate, when the positioning device is positioned along the second direction, any one of the first positioning member and the third positioning member can be selected for positioning, thereby facilitating positioning adjustment; by arranging the second positioning member and the fourth positioning member together on the second vertical plate, when the positioning device is positioned along the second direction, any one of the second positioning member and the fourth positioning member can be selected for positioning, thereby facilitating positioning adjustment.

[0034] In some embodiments of the present application, the third positioning member has a third positioning surface for positioning, the fourth positioning member has a fourth positioning surface for positioning, and the third positioning surface and the fourth positioning surface are in the same plane.

[0035] By arranging the third positioning surface and the fourth positioning surface in the same plane, the position of the positioning device along the second direction can be positioned by the third positioning surface and the fourth positioning surface, so that the position of the clamping assembly can be positioned along the second direction by the positioned positioning device.

[0036] In some embodiments of the present application,

[0037] The first positioning member is connected to the first vertical plate in a detachable manner;

[0038] And / or, the second positioning member is connected to the second vertical plate in a detachable manner;

[0039] And / or, the third positioning member is connected to the first vertical plate in a detachable manner;

[0040] And / or, the fourth positioning member is connected to the second vertical plate in a detachable manner.

[0041] By arranging the first positioning member, and / or the second positioning member, and / or the third positioning member, and / or the fourth positioning member in a detachable manner, it is convenient to adjust the size and position of the first positioning member, and / or the second positioning member, and / or the third positioning member, and / or the fourth positioning member so as to match the clamping assembly.

[0042] A second aspect of the present application discloses a welding device, which includes any of the positioning devices described above. The welding device also includes a clamping assembly, and the positioning device is configured to position the clamping assembly.

[0043] The third aspect of the present application discloses a battery production line, which includes the above-mentioned welding equipment, and the welding equipment is used to weld the end plates and side plates of the battery module.

[0044] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0046] Figure 1 A schematic diagram of the structure of a positioning device provided in some embodiments of the present application;

[0047] Figure 2It is a schematic diagram of the structure of the battery module to be welded;

[0048] Figure 3 To include Figure 1 A schematic diagram of the front structure of a welding device for a positioning device;

[0049] Figure 4 It is an isometric view of a part of the structure of the welding equipment in 3;

[0050] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0051] Figure 6 for Figure 4 A schematic diagram of the enlarged structure of part B in FIG.

[0052] Figure 7 for Figure 3 A top view of the matching state of the positioning device and the end pressure piece;

[0053] Figure 8 for Figure 3 A schematic cross-sectional structure diagram of the cooperation state of the positioning device and the side pressure piece;

[0054] Fig. 9 for Figure 3 A top view of the matching state of the positioning device and the extrusion part.

[0055] The symbols in the accompanying drawings represent the following:

[0056] 1000. Welding equipment;

[0057] 100. Positioning device;

[0058] 10. Bottom plate;

[0059] 20. First vertical board;

[0060] 30. Second vertical board;

[0061] 41. first positioning member; 42. second positioning member; 43. third positioning member; 44. fourth positioning member;

[0062] 51. First marking structure; 52. Second marking structure; 53. Third marking structure; 54. Fourth marking structure;

[0063] 60. first connecting member; 61. first plate portion; 62. second plate portion;

[0064] 70. second connecting member; 71. third plate portion; 72. fourth plate portion;

[0065] 201, base; 202, support member; 203, gantry extrusion assembly; 204, first end pressure assembly; 2041, first end pressure member; 205, second end pressure assembly; 2051, second end pressure member; 206, first side pressure assembly; 2061, first side pressure member; 207, second side pressure assembly; 2071, second side pressure member; 208, welding nozzle; 2081, opening; 209, extrusion member;

[0066] 300, battery module; 301, end plate; 302, side plate; 303, battery cell; 304, weld. DETAILED DESCRIPTION

[0067] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0068] 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 implementation methods 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.

[0069] In the description of the implementation methods of this 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 implementation methods of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0070] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment 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.

[0071] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0072] 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).

[0073] 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, and 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.

[0074] 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.

[0075] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0076] The connection between the vertical plate and the side plate of the battery module of new energy vehicles is usually made by laser welding. The battery, end plate and side plate need to be assembled before welding. In order to ensure the welding quality, an assembly gap is set at the welding position of the end plate and the side plate.

[0077] In the actual production process, poor welding caused by the assembly gap between the end plate and the side plate requires repeated corrections after observing the welding effect, which makes the welding process complicated.

[0078] In order to solve the problem of poor welding between the end plate and the side plate in the battery module, the present application proposes a positioning device, a welding device including the positioning device, and a battery production line having the welding device. According to the positioning device of the present application, it is possible to complete the positioning and clamping between the end plate and the side plate of the battery module, improve the assembly accuracy between the end plate and the side plate of the battery module, and then improve the welding accuracy between the end plate and the side plate of the battery module, reduce the occurrence of poor welding, and reduce the complexity of the welding process.

[0079] For the convenience of description, this application only takes the end plates and side plates of the battery module as an example for explanation.

[0080] Combination Figures 1 to 8 As shown, in some embodiments of the present application, the positioning device 100 is used to position the clamping assembly of the welding device 1000, and the clamping assembly is used to clamp the battery module 300, wherein the positioning device 100 includes a bottom plate 10, a first vertical plate 20, a second vertical plate 30, a first positioning member 41 and a second positioning member 42, wherein the first vertical plate 20 is arranged at one end of the bottom plate 10 along the first direction, the second vertical plate 30 is arranged at the other end of the bottom plate 10 along the first direction, the first positioning member 41 is arranged at the plate surface of the first vertical plate 20 away from the bottom plate 10 along the first direction, and the second positioning member 42 is arranged at the plate surface of the second vertical plate 30 away from the bottom plate 10 along the first direction. The first vertical plate 20 and the second vertical plate 30 are configured to position the clamping assembly along the first direction, and the first positioning member 41 and the second positioning member 42 are configured to position the positioning device 100 along the second direction, wherein the first direction is one of the length direction or the width direction of the bottom plate 10, and the second direction is the other of the length direction or the width direction of the bottom plate 10.

[0081] Specifically, Figure 2 As shown, the battery module 300 includes two end plates 301 disposed opposite to each other along the length direction of the battery module 300, and two side plates 302 disposed opposite to each other along the width direction of the battery module 300. The end plates 301 and the side plates 302 need to be welded to form a frame structure for accommodating the battery cells 303.

[0082] Combination Figure 1 and Figure 2As shown, the positioning device 100 includes a first vertical plate 20 and a second vertical plate 30 arranged relatively along a first direction. The first direction can be the length direction of the bottom plate 10, and when the positioning device 100 is used to position the clamping assembly, the length direction of the positioning device 100 is consistent with the length direction of the battery module 300 when it is clamped on the welding device 1000. The first positioning member 41 and the second positioning member 42 can be respectively protruding structures provided on the surface of the vertical plate where they are located, and optionally, they can be plate-like structures, so as to facilitate fitting and positioning with the clamping assembly. The first positioning member 41 and the second positioning member 42 are configured to position the positioning device 100 along a second direction. The second direction can be the width direction of the bottom plate 10, and when the positioning device 100 is used to position the clamping assembly, the width direction of the positioning device 100 is consistent with the width direction of the battery module 300 when it is clamped on the welding device 1000.

[0083] Combination Figures 3 to 7 As shown, the welding equipment 1000 includes a base 201 and a support member 202 and a clamping assembly arranged on the base 201. Among them, the support member 202 is used to fix and support the battery module 300 or the positioning device 100. The positioning device 100 can be placed on the support member 202, and the clamping position of the clamping assembly relative to the positioning device 100 is adjusted to complete the positioning of the clamping assembly. After the adjustment is completed, the positioning device 100 is removed, and the battery module 300 is placed on the support member 202, and the battery module 300 is clamped by the positioned clamping assembly, so as to complete the positioning welding of the end plate 301 and the side plate 302, improve the welding accuracy between the end plate 301 and the side plate 302 of the battery module 300, reduce the occurrence of poor welding, and reduce the complexity of the welding process.

[0084] Among them, the clamping assembly of the welding device 1000 includes a gantry extrusion assembly 203, which is arranged above the support member 202 in the vertical direction, so that the battery module 300 and the positioning device 100 can be positioned in the vertical direction. When the positioning device 100 of the present application is used to position the clamping assembly, the gantry extrusion assembly 203 can be moved in the vertical direction toward the direction close to the positioning device 100, thereby extruding the positioning device 100 in the vertical direction, and making the bottom surface of the positioning device 100 fit the support member 202, and then positioning the positioning device 100 in the vertical direction.

[0085] The clamping assembly of the welding device 1000 further includes a first end pressing assembly 204 and a second end pressing assembly 205 arranged relatively along a first direction, and at least one of the first end pressing assembly 204 and the second end pressing assembly 205 can move along the first direction, so as to clamp the battery module 300 along the first direction. In some embodiments of the present application, the first end pressing assembly 204 is a fixed end, and its position remains stationary, and the second end pressing assembly 205 is a movable end, and can move along the first direction toward or away from the first end pressing assembly 204. When the positioning device 100 of the present application is used to position the clamping assembly along the first direction, the first vertical plate 20 is brought into contact with the first end pressing piece 2041 on the first end pressing assembly 204, and the second end pressing piece 2051 on the second end pressing assembly 205 is moved toward the direction close to the positioning device 100, and the spacing between the second end pressing piece 2051 and the second vertical plate 30 along the first direction is adjusted by a feeler gauge, and then the relative clamping position between the first end pressing piece 2041 and the second end pressing piece 2051 is positioned and adjusted along the first direction by the positioning device 100. When the positioning device 100 is removed, the first end pressing piece 2041 and the second end pressing piece 2051 after positioning can be used together to clamp the two end plates of the battery module 300 along the first direction, thereby completing the positioning and clamping between the two end plates 301 of the battery module 300.

[0086] The clamping assembly of the welding device 1000 further includes a first side pressure assembly 206 and a second side pressure assembly 207 which are arranged opposite to each other along the second direction. The first side pressure assembly 206 and the second side pressure assembly 207 can move along the second direction respectively, so as to clamp the battery module 300 along the second direction. When the positioning device 100 of the present application is used to position the clamping assembly along the second direction, the first positioning member 41 is fitted with the first end pressure member 2041, and the second positioning member 42 is fitted with the second end pressure member 2051, so as to position the positioning device 100 along the second direction. Then, the first side pressure piece 2061 on the first side pressure assembly 206 and the second side pressure piece 2071 on the second side pressure assembly 207 are respectively moved toward the direction close to the positioning device 100, and the spacing between the first side pressure piece 2061 and the second side pressure piece 2071 and the positioning device 100 along the second direction is adjusted by a feeler gauge, and then the relative clamping position between the first side pressure piece 2061 and the second side pressure piece 2071 is positioned and adjusted along the second direction by the positioning device 100. When the positioning device 100 is removed, the side plates 302 on both sides of the battery module 300 can be clamped along the second direction by the positioned first side pressure piece 2061 and the second side pressure piece 2071, thereby completing the positioning and clamping between the end plate 301 and the side plate 302 of the battery module 300, improving the assembly accuracy between the end plate 301 and the side plate 302 of the battery module 300, and further improving the welding accuracy between the end plate 301 and the side plate 302 of the battery module 300, thereby reducing the occurrence of poor welding.

[0087] Combination Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, along the first direction, the spacing dimension between the plate surface of the first vertical plate 20 facing away from the second vertical plate 30 and the plate surface of the second vertical plate 30 facing away from the first vertical plate 20 is configured to be smaller than the length dimension of the battery module 300.

[0088] Specifically, the length dimension of the battery module 300 is the length dimension of the side plate 302. By setting the spacing dimension between the plate surface of the first vertical plate 20 facing away from the second vertical plate 30 and the plate surface of the second vertical plate 30 facing away from the first vertical plate 20 to be smaller than the length dimension of the battery module 300, the clamping dimension between the first end pressing member 2041 and the second end pressing member 2051 along the first direction can be smaller than the length dimension of the battery module 300, so that when the positioning device 100 is removed and the battery module 300 is placed on the welding device 1000, the first end pressing member 2041 and the second end pressing member 2051 can clamp the battery module 300 along the first direction, thereby reducing the position deviation of the battery module 300 during the welding process.

[0089] Combination Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, along the first direction, the spacing dimension between the plate surface of the first vertical plate 20 facing away from the second vertical plate 30 and the plate surface of the second vertical plate 30 facing away from the first vertical plate 20 is configured to have a difference range of 0.1mm-1mm from the length dimension of the battery module 300.

[0090] Specifically, the difference between the two ranges from 0.1 mm to 1.0 mm, and can be any value from 0.1 mm to 0.2 mm to 0.5 mm to 0.9 mm to 1.0 mm.

[0091] The above difference range enables the first end pressing member 2041 and the second end pressing member 2051 to clamp the battery module 300 along the first direction without causing excessive squeezing of the battery module 300 , thereby reducing damage to the battery module 300 .

[0092] Combination Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, in some embodiments of the present application, along the first direction, the first vertical plate 20 and the second vertical plate 30 are symmetrically arranged at both ends of the bottom plate 10, and along the second direction, the size of the first vertical plate 20 and the size of the second vertical plate 30 are respectively greater than or equal to the size of the bottom plate 10, and the size of the first vertical plate 20 and the size of the second vertical plate 30 are respectively equal to the width size of the battery module 300.

[0093] Specifically, the width dimension of the battery module 300 is the sum of the width dimension of the end plate 301 and the thickness dimension of the side plates 302 on both sides. By setting the dimensions of the first vertical plate 20 and the second vertical plate 30 to be equal to the width dimension of the battery module 300, the first side pressure member 2061 and the second side pressure member 2071 are positioned along the second direction with the first vertical plate 20 and the second vertical plate 30 as references, that is, the first side pressure member 2061 and the second side pressure member 2071 are positioned along the second direction for the battery module 300, thereby positioning and clamping the battery module 300 along the second direction.

[0094] Combination Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments of the present application, a first marking structure 51 and a second marking structure 52 are provided on the plate surface of the first vertical plate 20 away from the bottom plate 10 along the first direction. Along the second direction, the first marking structure 51 and the second marking structure 52 are respectively provided on both sides of the first positioning member 41. The positions of the first marking structure 51 and the second marking structure 52 on the first vertical plate 20 are configured to be consistent with the position of the weld 304 on one end face of the battery module 300.

[0095] Specifically, after the end plate 301 and the side plate 302 of the battery module 300 are welded, a weld 304 is formed at the connection between the two. The end surface of one end of the battery module 300 along the length direction is provided with two welds 304 spaced along the second direction, and the weld 304 is extended along the third direction, and the third direction is perpendicular to the first direction and the second direction respectively, and can be a vertical direction. The first marking structure 51 and the second marking structure 52 can be a strip structure protruding from the surface of the first vertical plate 20, or the first marking structure 51 and the second marking structure 52 can be other display structures with a distinguishing function with the surface of the first vertical plate 20. Among them, the positions of the first marking structure 51 and the second marking structure 52 on the first vertical plate 20 are configured to be consistent with the position of the weld 304 on one end surface of the battery module 300, that is, the positions of the first marking structure 51 and the second marking structure 52 relative to the first vertical plate 20 along the second direction and the third direction are consistent with the positions of the two welds 304 on one end surface of the battery module 300 relative to the end plate 301.

[0096] By setting the positions of the first marking structure 51 and the second marking structure 52 on the first vertical plate 20 to be consistent with the position of the weld 304 on one end face of the battery module 300, the first marking structure 51 and the second marking structure 52 are used as a reference to complete the positioning of the welding position along the second direction and the third direction, that is, the positioning of the weld 304 on one end face of the battery module 300 along the second direction and the third direction is achieved, thereby improving the welding accuracy.

[0097] Combination Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments of the present application, a third marking structure 53 and a fourth marking structure 54 are provided on the plate surface of the second vertical plate 30 away from the bottom plate 10 along the first direction, and along the second direction, the third marking structure 53 and the fourth marking structure 54 are respectively provided on both sides of the second positioning member 42, and the positions of the third marking structure 53 and the fourth marking structure 54 on the second vertical plate 30 are configured to be consistent with the position of the weld 304 on the other end face of the battery module 300.

[0098] Specifically, the other end face of the battery module 300 along the length direction is provided with two welds 304 spaced apart along the second direction, and the welds 304 are extended along the third direction, which is perpendicular to the first direction and the second direction respectively, and can be a vertical direction. The third marking structure 53 and the fourth marking structure 54 can be a strip structure protruding from the surface of the second vertical plate 30, or the third marking structure 53 and the fourth marking structure 54 can be other display structures with a distinguishing function with the surface of the second vertical plate 30. Among them, the positions of the third marking structure 53 and the fourth marking structure 54 on the second vertical plate 30 are configured to be consistent with the positions of the welds 304 on the other end face of the battery module 300, that is, the positions of the third marking structure 53 and the fourth marking structure 54 relative to the second vertical plate 30 along the second direction and the third direction are consistent with the positions of the two welds 304 on the other end face of the battery module 300 relative to the end plate 301.

[0099] By setting the positions of the third marking structure 53 and the fourth marking structure 54 on the second vertical plate 30 to be consistent with the position of the weld 304 on the other end face of the battery module 300, the positioning of the welding position along the second direction and the third direction is completed with the third marking structure 53 and the fourth marking structure 54 as a reference, that is, the positioning of the weld 304 on the other end face of the battery module 300 along the second direction and the third direction is achieved, thereby improving the welding accuracy.

[0100] Combination Figure 1 and Figure 7 As shown, in some embodiments of the present application, the first vertical plate 20 is connected to the bottom plate 10 in a detachable manner, and / or the second vertical plate 30 is connected to the bottom plate 10 in a detachable manner.

[0101] Specifically, the first vertical plate 20 and / or the second vertical plate 30 may be detachably connected to the bottom plate 10 via a connecting piece, or the first vertical plate 20 and / or the second vertical plate 30 may be detachably connected to the bottom plate 10 via their own structure.

[0102] By connecting the first vertical plate 20 and / or the second vertical plate 30 to the base plate 10 in a detachable manner, the first vertical plate 20, the second vertical plate 30 and the base plate 10 of different sizes can be replaced according to the size of the battery module 300 to be positioned and clamped, thereby improving the applicability of the positioning device 100.

[0103] Combination Figure 1 and Figure 7 As shown, in some embodiments of the present application, a first connecting member 60 is further included, and the first connecting member 60 includes a first plate portion 61 and a second plate portion 62 arranged at an angle, the first plate portion 61 is connected to the base plate 10 in a detachable manner, and the second plate portion 62 is connected to the first vertical plate 20 in a detachable manner.

[0104] Specifically, the first plate portion 61 and the second plate portion 62 may be an integral L-shaped structure. The first plate portion 61 fits with the bottom plate 10 and can be detachably connected to the bottom plate 10 via a connecting pin, and the second plate portion 62 fits with the first vertical plate 20 and can be connected to the first vertical plate 20 via a connecting pin.

[0105] The first connecting member 60 is provided to facilitate the connection between the bottom plate 10 and the first vertical plate 20 . Meanwhile, the connecting member with a plate-like structure can improve the connection strength between the bottom plate 10 and the first vertical plate 20 .

[0106] Combination Figure 1 and Figure 7 As shown, in some embodiments of the present application, a second connecting member 70 is further included, and the second connecting member 70 includes a third plate portion 71 and a fourth plate portion 72 arranged at an angle, the third plate portion 71 is connected to the base plate 10 in a detachable manner, and the fourth plate portion 72 is connected to the second vertical plate 30 in a detachable manner.

[0107] Specifically, the third plate portion 71 and the fourth plate portion 72 may be an integral L-shaped structure. The third plate portion 71 fits with the bottom plate 10 and can be detachably connected to the bottom plate 10 via a connecting pin, and the fourth plate portion 72 fits with the second vertical plate 30 and can be connected to the second vertical plate 30 via a connecting pin.

[0108] The second connecting member 70 is provided to facilitate the connection between the bottom plate 10 and the second vertical plate 30 . Meanwhile, the connecting member with a plate-like structure can improve the connection strength between the bottom plate 10 and the second vertical plate 30 .

[0109] Combination Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the first positioning member 41 has a first positioning surface for positioning (not shown in the figure), and the second positioning member 42 has a second positioning surface for positioning (not shown in the figure), and the first positioning surface and the second positioning surface are in the same plane.

[0110] Specifically, a first positioning surface that fits with the first end pressure piece 2041 is provided on one side surface of the first positioning piece 41 along the second direction, and a second positioning surface that fits with the second end pressure piece 2051 is provided on one side surface of the second positioning piece 42 along the second direction. After the first end pressure piece 2041 and the second end pressure piece 2051 are positioned along the first direction by the positioning device 100, the position of the positioning device 100 is adjusted along the second direction so that the side surface of the first end pressure piece 2041 along the second direction fits with the first positioning surface of the first positioning piece 41, and the side surface of the second end pressure piece 2051 along the second direction fits with the second positioning surface of the second positioning piece 42, thereby positioning the positioning device 100 along the second direction. Then, the first side pressure piece 2061 and the second side pressure piece 2071 are positioned along the second direction by the positioned positioning device 100. The first side pressure piece 2061 is moved in a direction toward the positioning device 100, and the spacing between the first side pressure piece 2061 and the side surface of the first vertical plate 20 and the second vertical plate 30 is adjusted by a feeler gauge so that the spacing is within the normal assembly gap size. At the same time, the second side pressure piece 2071 is moved in a direction toward the positioning device 100, and the spacing between the second side pressure piece 2071 and the other side surface of the first vertical plate 20 and the second vertical plate 30 is adjusted by a feeler gauge so that the spacing is within the normal assembly gap size, thereby achieving the positioning of the first side pressure piece 2061 and the second side pressure piece 2071 in the second direction. Since the dimensions of the first vertical plate 20 and the second vertical plate 30 in the second direction are consistent with the width dimension of the battery module 300, the first side pressure piece 2061 and the second side pressure piece 2071 after positioning can position and clamp the battery module 300 in the width direction, and have sufficient assembly gap.

[0111] By arranging the first positioning surface and the second positioning surface in the same plane, the position of the positioning device 100 along the second direction can be positioned by the first positioning surface and the second positioning surface, so that the position of the first side pressure member 2061 and the second side pressure member 2071 can be positioned along the second direction by the positioned positioning device 100.

[0112] Combination Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, a third positioning member 43 and a fourth positioning member 44 are further included. The third positioning member 43 is arranged on the board surface of the first vertical plate 20 away from the bottom plate 10 along the first direction, and is spaced apart from the first positioning member 41 along the second direction. The fourth positioning member 44 is arranged on the board surface of the second vertical plate 30 away from the bottom plate 10 along the first direction, and is spaced apart from the second positioning member 42 along the second direction.

[0113] Specifically, the third positioning member 43 and the fourth positioning member 44 can be respectively raised structures protruding from the surface of the vertical plate where they are located. Optionally, the third positioning member 43 and the fourth positioning member 44 can be plate-like structures, so as to facilitate fitting and positioning with the first end pressure member 2041 and the second end pressure member 2051.

[0114] By arranging the first positioning member 41 and the third positioning member 43 together on the first vertical plate 20, when the positioning device is positioned along the second direction, any one of the first positioning member 41 and the third positioning member 43 can be selected to fit and position with the first end pressing member 2041, thereby facilitating positioning and adjustment. By arranging the second positioning member 42 and the fourth positioning member 44 together on the second vertical plate 30, when the positioning device 100 is positioned along the second direction, any one of the second positioning member 42 and the fourth positioning member 44 can be selected to fit and position with the second end pressing member 2051, thereby facilitating positioning and adjustment.

[0115] Combination Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the third positioning member 43 has a third positioning surface for positioning (not shown in the figure), and the fourth positioning member 44 has a fourth positioning surface for positioning (not shown in the figure), and the third positioning surface and the fourth positioning surface are in the same plane.

[0116] Specifically, a third positioning surface that fits with the first end pressing member 2041 is provided on one side surface of the third positioning member 43 along the second direction, and a fourth positioning surface that fits with the second end pressing member 2051 is provided on one side surface of the fourth positioning member 44 along the second direction. After the first end pressing member 2041 and the second end pressing member 2051 are positioned along the first direction by the positioning device 100, the position of the positioning device 100 is adjusted along the second direction so that the side surface of the first end pressing member 2041 along the second direction fits with the third positioning surface of the third positioning member 43, and the side surface of the second end pressing member 2051 along the second direction fits with the fourth positioning surface of the fourth positioning member 44, thereby positioning the positioning device 100 along the second direction.

[0117] By arranging the third positioning surface and the fourth positioning surface in the same plane, the position of the positioning device 100 along the second direction can be positioned by the third positioning surface and the fourth positioning surface, so that the position of the first side pressure member 2061 and the second side pressure member 2071 can be positioned along the second direction by the positioned positioning device 100.

[0118] Combination Figure 1 , Figure 7 and Figure 8 As shown, in some embodiments of the present application,

[0119] The first positioning member 41 is connected to the first vertical plate 20 in a detachable manner;

[0120] And / or, the second positioning member 42 is connected to the second vertical plate 30 in a detachable manner;

[0121] And / or, the third positioning member 43 is connected to the first vertical plate 20 in a detachable manner;

[0122] And / or, the fourth positioning member 44 is connected to the second vertical plate 30 in a detachable manner.

[0123] Specifically, the first positioning member 41 may be detachably connected to the first vertical plate 20 via a connecting pin. And / or, the second positioning member 42 may be detachably connected to the second vertical plate 30 via a connecting pin. And / or, the third positioning member 43 may be detachably connected to the first vertical plate 20 via a connecting pin. And / or, the fourth positioning member 44 may be detachably connected to the second vertical plate 30 via a connecting pin.

[0124] By arranging the first positioning member 41, and / or the second positioning member 42, and / or the third positioning member 43, and / or the fourth positioning member 44 in a detachable manner, it is convenient to adjust the size and position of the first positioning member 41, and / or the second positioning member 42, and / or the third positioning member 43, and / or the fourth positioning member 44 so as to match the first end pressure member 2041 and the second end pressure member 2051.

[0125] A second aspect of the present application discloses a welding device 1000, which includes a positioning device 100 according to any one of the above embodiments. The welding device 1000 also includes a clamping assembly, and the positioning device 100 is configured to position the clamping assembly.

[0126] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the welding device 1000 includes a base 201 and a support member 202 and a clamping assembly arranged on the base 201. Among them, the support member 202 is used to fix and support the battery module 300 or the positioning device 100. The positioning device 100 can be placed on the support member 202, and the clamping position of the clamping assembly relative to the positioning device 100 is adjusted to complete the positioning of the clamping assembly. After the clamping assembly completes the positioning, the positioning device 100 is removed, and the battery module 300 is placed on the support member 202, and the battery module 300 is clamped by the positioned clamping assembly, thereby completing the positioning welding of the end plate 301 and the side plate 302, improving the welding accuracy between the end plate 301 and the side plate 302 of the battery module 300, reducing the occurrence of poor welding, and reducing the complexity of the welding process.

[0127] The clamping assembly of the welding device 1000 includes a gantry pressing assembly 203, which is arranged above the support member 202 in the vertical direction, so that the battery module 300 can be positioned in the vertical direction. The clamping assembly of the welding device 1000 also includes a first end pressing assembly 204 and a second end pressing assembly 205 arranged relatively in a first direction, and at least one of the first end pressing assembly 204 and the second end pressing assembly 205 can move in the first direction, so as to clamp the battery module 300 in the first direction. The clamping assembly of the welding device 1000 also includes a first side pressing assembly 206 and a second side pressing assembly 207 arranged relatively in a second direction, and the first side pressing assembly 206 and the second side pressing assembly 207 can move in the second direction respectively, so as to clamp the battery module 300 in the second direction.

[0128] Since the welding equipment 1000 in the present application has the positioning device 100 in any of the above embodiments, it can achieve the same technical effect as the positioning device 100 in any of the above embodiments, and will not be described in detail here.

[0129] Combination Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the welding device 1000 further includes a welding nozzle 208, a welding nozzle 208 is respectively provided on both sides of the first end pressing assembly 204 along the second direction, a welding nozzle 208 is respectively provided on both sides of the second end pressing assembly 205 along the second direction, and the welding nozzle 208 is penetrated with an opening 2081 along the first direction. A welding tool such as a welding gun can pass through the opening 2081 and be used to weld the battery module 300 on the support member 202. Specifically, the opening is used to be arranged opposite to the connection between the end plate 301 and the side plate 302 of the battery module 300, and is used to weld the end plate 301 and the side plate 302.

[0130] The position of the welding nozzle 208 along the second direction and the third direction can also be positioned by the positioning device 100 in the present application. After the positioning device 100 is positioned along the first direction and the second direction, the position of the welding nozzle 208 along the second direction and the third direction can be adjusted, and the openings 2081 on the plurality of welding nozzles 208 are respectively arranged relative to the first marking structure 51, the second marking structure 52, the third marking structure 53 and the fourth marking structure 54, so that the position of the welding nozzle 208 along the second direction and the third direction can be positioned by the positioning device 100.

[0131] Combination Figure 4 , Figure 6 and Figure 7As shown, in some embodiments of the present application, the welding device 1000 further includes a plurality of extrusion members 209. Specifically, the plurality of extrusion members 209 include two groups of extrusion members 209 arranged along the first direction, and any group of extrusion members 209 includes at least two extrusion members 209 arranged oppositely and spaced apart along the second direction, and the two extrusion members 209 can move along the second direction respectively, and are used to extrude the side plate 302 of the battery module 300 onto the end plate 301, thereby facilitating welding between the end plate 301 and the side plate 302.

[0132] The position of the extrusion piece 209 along the first direction can also be positioned by the positioning device 100 in the present application. After the positioning device 100 is positioned along the first direction and the second direction, the position of the extrusion piece 209 along the first direction can be adjusted, and one group of the extrusion pieces 209 is respectively arranged opposite to the two side surfaces of the first vertical plate 20 along the second direction, and another group of the extrusion pieces 209 is respectively arranged opposite to the two side surfaces of the second vertical plate 30 along the second direction, thereby completing the positioning of the extrusion piece 209.

[0133] The third aspect of the present application discloses a battery production line, which includes the welding device 1000 of the above-mentioned embodiment, and the welding device 1000 is used to weld the end plate 301 and the side plate 302 of the battery module 300.

[0134] Since the battery production line in the present application has the welding device 1000 in any of the above embodiments, it can achieve the same technical effect as the welding device 1000 in any of the above embodiments, and will not be described in detail here.

[0135] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0136] Combination Figures 1 to 8 As shown, a welding device 1000 is used to weld the end plate 301 and the side plate 302 of the battery module 300. The welding device 1000 includes a clamping assembly and a positioning device 100. The positioning device 100 is configured to position the clamping assembly.

[0137] Wherein, the positioning device 100 includes a base plate 10, a first vertical plate 20, a second vertical plate 30, a first positioning member 41 and a second positioning member 42, the first vertical plate 20 is arranged at one end of the base plate 10 along the first direction, the second vertical plate 30 is arranged at the other end of the base plate 10 along the first direction, the first positioning member 41 is arranged on the board surface of the first vertical plate 20 away from the base plate 10 along the first direction, and the second positioning member 42 is arranged on the board surface of the second vertical plate 30 away from the base plate 10 along the first direction; wherein, the first vertical plate 20 and the second vertical plate 30 are configured to position the clamping assembly along the first direction, the first positioning member 41 and the second positioning member 42 are configured to position the positioning device 100 along the second direction, the first direction is the length direction of the base plate 10, and the second direction is the width direction of the base plate 10.

[0138] Along the first direction, the spacing between the surface of the first vertical plate 20 facing away from the second vertical plate 30 and the surface of the second vertical plate 30 facing away from the first vertical plate 20 is configured to be smaller than the length dimension of the battery module 300, and the difference between the two ranges from 0.1mm to 1.0mm.

[0139] Along the first direction, the first vertical plate 20 and the second vertical plate 30 are symmetrically arranged at both ends of the bottom plate. Along the second direction, the size of the first vertical plate 20 and the size of the second vertical plate 30 are respectively larger than the size of the bottom plate 10, and the size of the first vertical plate 20 and the size of the second vertical plate 30 are respectively equal to the width size of the battery module 300.

[0140] The first vertical plate 20 is provided with a first marking structure 51 and a second marking structure 52 on the plate surface facing away from the bottom plate 10 along the first direction. Along the second direction, the first marking structure 51 and the second marking structure 52 are respectively provided on both sides of the first positioning member 41. The positions of the first marking structure 51 and the second marking structure 52 on the first vertical plate 20 are configured to be consistent with the position of the weld 304 on one end face of the battery module 300.

[0141] A third marking structure 53 and a fourth marking structure 54 are provided on the plate surface of the second vertical plate 30 away from the bottom plate 10 along the first direction. Along the second direction, the third marking structure 53 and the fourth marking structure 54 are respectively provided on both sides of the second positioning member 42. The positions of the third marking structure 53 and the fourth marking structure 54 on the second vertical plate 30 are configured to be consistent with the position of the weld 304 on the other end face of the battery module 300.

[0142] The positioning device 100 further includes a first connecting member 60, which includes a first plate portion 61 and a second plate portion 62 arranged at an angle, the first plate portion 61 is detachably connected to the bottom plate 10, and the second plate portion 62 is detachably connected to the first vertical plate 20. The positioning device 100 further includes a second connecting member 70, which includes a third plate portion 71 and a fourth plate portion 72 arranged at an angle, the third plate portion 71 is detachably connected to the bottom plate 10, and the fourth plate portion 72 is detachably connected to the second vertical plate 30.

[0143] The first positioning member 41 has a first positioning surface for positioning, and the second positioning member 42 has a second positioning surface for positioning. The first positioning surface and the second positioning surface are in the same plane.

[0144] The positioning device 100 also includes a third positioning member 43 and a fourth positioning member 44. The third positioning member 43 is arranged on the surface of the first vertical plate 20 away from the bottom plate 10 along the first direction, and is spaced apart from the first positioning member 41 along the second direction. The fourth positioning member 44 is arranged on the surface of the second vertical plate 30 away from the bottom plate 10 along the first direction, and is spaced apart from the second positioning member 42 along the second direction. The third positioning member 43 has a third positioning surface for positioning, and the fourth positioning member 44 has a fourth positioning surface for positioning. The third positioning surface and the fourth positioning surface are in the same plane. The first positioning member 41 and the third positioning member 43 are respectively connected to the first vertical plate 20 in a detachable manner, and the second positioning member 42 and the fourth positioning member 44 are respectively connected to the second vertical plate 30 in a detachable manner.

[0145] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A positioning device for positioning a clamping assembly of a welding device, wherein the clamping assembly is used to clamp a workpiece to be welded, characterized in that: The positioning device comprises: Base plate; A first vertical plate, the first vertical plate is arranged at one end of the bottom plate along a first direction; a second vertical plate, the second vertical plate being arranged at the other end of the bottom plate along the first direction; A first positioning member, the first positioning member is disposed along the first direction on a surface of the first vertical plate facing away from the bottom plate; a second positioning member, the second positioning member being arranged along the first direction on a surface of the second vertical plate facing away from the bottom plate; Wherein, the first vertical plate and the second vertical plate are configured to position the clamping assembly along the first direction, and the first positioning member and the second positioning member are configured to position the positioning device along the second direction, the first direction is one of the length direction or the width direction of the base plate, and the second direction is the other of the length direction or the width direction of the base plate.

2. The positioning device according to claim 1, characterized in that: Along the first direction, a spacing dimension between a plate surface of the first vertical plate facing away from the second vertical plate and a plate surface of the second vertical plate facing away from the first vertical plate is configured to be smaller than a length dimension of the to-be-welded member.

3. The positioning device according to claim 2, characterized in that: Along the first direction, the spacing between the surface of the first vertical plate facing away from the second vertical plate and the surface of the second vertical plate facing away from the first vertical plate is configured to have a difference range of 0.1 mm-1.0 mm from the length dimension of the to-be-welded part.

4. The positioning device according to claim 1, characterized in that: Along the first direction, the first vertical plate and the second vertical plate are symmetrically arranged at both ends of the base plate. Along the second direction, the size of the first vertical plate and the size of the second vertical plate are respectively greater than or equal to the size of the base plate, and the size of the first vertical plate and the size of the second vertical plate are respectively equal to the width size of the part to be welded.

5. The positioning device according to claim 4, characterized in that: The first vertical plate is provided with a first marking structure and a second marking structure on the plate surface facing away from the base plate along the first direction. Along the second direction, the first marking structure and the second marking structure are respectively provided on both sides of the first positioning member. The positions of the first marking structure and the second marking structure on the first vertical plate are configured to be consistent with the position of the weld on one end face of the part to be welded.

6. The positioning device according to claim 5, characterized in that: The second vertical plate is provided with a third marking structure and a fourth marking structure on the plate surface facing away from the base plate along the first direction. Along the second direction, the third marking structure and the fourth marking structure are respectively provided on both sides of the second positioning member. The positions of the third marking structure and the fourth marking structure on the second vertical plate are configured to be consistent with the position of the weld on the other end face of the part to be welded.

7. The positioning device according to any one of claims 1 to 6, characterized in that: The first vertical plate is detachably connected to the bottom plate, and / or the second vertical plate is detachably connected to the bottom plate.

8. The positioning device according to claim 7, characterized in that: It also includes a first connecting member, which includes a first plate portion and a second plate portion arranged at an angle, the first plate portion is detachably connected to the bottom plate, and the second plate portion is detachably connected to the first vertical plate.

9. The positioning device according to claim 7, characterized in that: It also includes a second connecting member, which includes a third plate portion and a fourth plate portion arranged at an angle, the third plate portion is detachably connected to the bottom plate, and the fourth plate portion is detachably connected to the second vertical plate.

10. The positioning device according to any one of claims 1 to 6, characterized in that: The first positioning member has a first positioning surface for positioning, and the second positioning member has a second positioning surface for positioning, and the first positioning surface and the second positioning surface are in the same plane.

11. The positioning device according to claim 10, characterized in that: It also includes a third positioning member and a fourth positioning member. The third positioning member is arranged on the surface of the first vertical plate away from the bottom plate along the first direction, and is spaced apart from the first positioning member along the second direction. The fourth positioning member is arranged on the surface of the second vertical plate away from the bottom plate along the first direction, and is spaced apart from the second positioning member along the second direction.

12. The positioning device according to claim 11, characterized in that: The third positioning member has a third positioning surface for positioning, the fourth positioning member has a fourth positioning surface for positioning, and the third positioning surface and the fourth positioning surface are in the same plane.

13. The positioning device according to claim 11, characterized in that: The first positioning member is connected to the first vertical plate in a detachable manner; And / or, the second positioning member is detachably connected to the second vertical plate; And / or, the third positioning member is detachably connected to the first vertical plate; And / or, the fourth positioning member is detachably connected to the second vertical plate.

14. A welding device, characterized in that: The welding device comprises the positioning device according to any one of claims 1 to 13, and further comprises a clamping assembly, wherein the positioning device is configured to position the clamping assembly.

15. A battery production line, characterized in that: The welding device according to claim 14 is used for welding the vertical plate and the side plate of the battery module.

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