Welding fixture and battery production line

Abstract

The utility model relates to the technical field of battery manufacturing, and provides a welding clamp and a battery production line. The welding fixture comprises a fixed base, the supporting piece is connected with one side of the fixed base and extends in the direction away from the fixed base; the cover plate is connected with the end, away from the fixed base, of the supporting piece, extends in the horizontal direction and is spaced from the fixed base; the reference plate is arranged on the cover plate, and the reference plate is provided with an avoiding part through which the laser beam passes; and the lifting adjusting mechanism comprises a driving assembly arranged on the fixed base and a clamping assembly connected with the driving assembly, the clamping assembly is arranged below the datum plate and used for fixing the to-be-welded part, and the driving assembly is used for driving the clamping assembly to ascend or descend. According to the technical scheme, the adjustment time of the defocusing amount during welding can be saved, and the welding efficiency and the welding quality are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a welding fixture 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] At present, the sealing pins on the battery cells are usually welded to the end covers of the battery cells, and during the welding process, the stability of the defocus amount is an important control parameter to ensure the welding quality. If the defocus amount is unstable, it will easily lead to insufficient welding penetration, thereby affecting the welding quality of the sealing pins.

[0004] In the related art, the welding fixture used for sealing pin welding needs to adjust the defocus amount every time the battery cell is changed. The adjustment process is time-consuming and the welding efficiency is low. Utility Model Content

[0005] In view of the above problems, the purpose of this application is to provide a welding fixture and a battery production line to at least solve the problem that the defocus adjustment takes a long time when the battery cell is changed, resulting in low sealing pin welding efficiency. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the present application provides a welding fixture, comprising: a fixed base; a support member connected to one side of the fixed base and extending in a direction away from the fixed base; a cover plate connected to an end of the support member away from the fixed base, and the cover plate extends in a horizontal direction and is spaced apart from the fixed base; a reference plate provided on the cover plate, and the reference plate is provided with an avoidance portion for a laser beam to pass through; a lifting and adjusting mechanism, comprising a driving assembly provided on the fixed base and a clamping assembly connected to the driving assembly, the clamping assembly being provided below the reference plate and used to fix a workpiece to be welded, and the driving assembly being used to drive the clamping assembly to rise or fall.

[0007] In the above technical solution, the fixed base is used to be arranged on the welding platform, and a space for installing the driving assembly is defined between the fixed base and the support member and the cover plate, and the space can also be used as a space for the clamping assembly and the parts to be welded to rise or fall. Before welding, the driving assembly is used to drive the clamping assembly and the parts to be welded to rise or fall, so that the welding area of ​​the parts to be welded corresponds to the position of the avoidance portion set by the reference plate. The defocus amount during welding is determined by the height of the reference plate. Since the height position of the upper cover plate and the reference plate does not need to be adjusted, the height from the output head of the welding equipment to the reference plate will not change, so that the defocus amount will not change, which improves the stability of the defocus amount, thereby solving the welding quality problem caused by the change of the defocus amount during welding. At the same time, when the battery cell is waiting for the welding part to be changed, since the height position of the upper cover plate and the reference plate does not need to be adjusted, the distance from the output head of the welding equipment to the reference plate remains unchanged, and the defocus amount remains unchanged, thereby saving the time for debugging the defocus amount, so as to improve the welding efficiency, and improve the consistency of the welding effect when welding parts of different specifications and models.

[0008] In addition, the welding fixture provided by the present application may also have the following additional technical features:

[0009] In some embodiments of the present application, the driving assembly includes: a driving member, which is arranged on the fixed base; and a transmission member, which is connected to the power output shaft of the driving member; wherein the clamping assembly is connected to the transmission member, and the driving member is used to drive the transmission member to move, so as to drive the clamping assembly to rise or fall.

[0010] In the above technical solution, the driving assembly includes a driving member and a transmission member connected to the driving member. By connecting the transmission member to the clamping assembly, the driving member can drive the transmission member to move when it is running, and drive the clamping assembly and the workpiece to be welded clamped by the clamping assembly to rise or fall, so as to adjust the welding position of the workpiece to be welded, so as to facilitate the laser beam emitted by the output head of the welding equipment to pass through the avoidance portion on the reference plate to weld the workpiece to be welded.

[0011] The driving member may be a cylinder, the transmission member may be a piston rod with one end provided in the cylinder and the other end protruding in the height direction, the clamping assembly is connected to the other end of the piston rod, and the cylinder drives the piston rod to move up and down, thereby driving the clamping assembly to rise or fall. Alternatively, the driving member may be an oil cylinder, the transmission member may be a piston rod with one end provided in the oil cylinder and the other end protruding in the height direction, the clamping assembly is connected to the other end of the piston rod, and the oil cylinder drives the piston rod to move up and down, thereby driving the clamping assembly to rise or fall.

[0012] In some embodiments of the present application, the driving member includes a motor, the transmission member includes a ball screw pair, one end of the screw of the ball screw pair is connected to the power output shaft of the motor, and the other end is rotatably connected to the cover plate, and the nut of the ball screw pair is provided on the clamping assembly, and the nut is configured to drive the clamping assembly to reciprocate along the screw when the screw rotates.

[0013] In the above technical solution, the ball screw pair includes a screw rod, a nut and a steel ball. The ball screw pair is a spiral transmission element with a steel ball as a rolling body between the screw rod and the nut, which can convert the rotational motion of the screw rod into the linear motion of the nut. When the motor drives the screw rod to rotate, the nut can drive the clamping assembly to reciprocate along the length of the screw rod, thereby driving the clamping assembly and the welded parts to rise or fall. The structure and principle are relatively simple and easy to implement.

[0014] In some embodiments of the present application, the clamping assembly includes a transmission plate and a clamping member disposed on the transmission plate, the transmission plate is connected to the driving assembly, and the transmission plate extends in a horizontal direction, and the clamping member is disposed on the upper surface of the transmission plate.

[0015] In the above technical solution, a transmission plate connected to the driving assembly is arranged under the clamping plate. The transmission plate extends in the horizontal direction and supports the clamping plate, thereby improving the stability of the clamping plate when moving in the height direction, and further improving the stability of the welded parts clamped by the clamping member during welding.

[0016] In some embodiments of the present application, the clamping member is movably connected to the transmission plate.

[0017] In the above technical solution, the clamping member is connected to the transmission plate in a manner that it can move relative to the transmission plate, so that the relative position of the workpiece to be welded clamped by the angle and the avoidance portion can be adjusted, thereby facilitating the laser beam to pass through the avoidance portion to weld the welding area of ​​the workpiece to be welded, which helps to improve the welding quality and welding efficiency.

[0018] In some embodiments of the present application, the clamping member is provided with a slide rail, the transmission plate is provided with a slide groove, the slide groove extends along the length direction of the transmission plate, and the slide rail is slidably connected to the slide groove.

[0019] In the above technical solution, by setting a slide rail on the clamping member and setting a slide groove on the transmission plate, the slide rail is inserted into the slide groove, so that the clamping member can slide back and forth relative to the transmission plate along the length direction of the transmission plate to adjust the relative position of the workpiece to be welded and the avoidance portion.

[0020] In some embodiments of the present application, there are two reference plates, which are spaced apart along the length direction of the cover plate; there are two clamping assemblies, which are connected to at least one driving assembly and are respectively arranged corresponding to the two reference plates.

[0021] In the above technical solution, by setting the number of reference plates and clamping assemblies to two, and setting the two clamping assemblies corresponding to the two reference plates respectively, each reference plate is provided with an avoidance portion, and each clamping assembly can clamp a workpiece to be welded, then at least one driving assembly is used to simultaneously drive the two clamping assemblies to rise or fall, so that two workpieces to be welded can be welded at the same time, which helps to further improve the welding efficiency.

[0022] In some embodiments of the present application, the cover plate is provided with a mounting notch, the reference plate is provided in the mounting notch, and is detachably connected to the cover plate.

[0023] In the above technical solution, the avoidance portion on the reference plate can have different structures, and the shape of the welding area can also be different. By setting the reference plate and the cover plate as a detachable connection, it is easy to replace different reference plates to adapt to different parts to be welded.

[0024] In some embodiments of the present application, the avoidance portion includes an avoidance gap or an avoidance hole.

[0025] In the above technical solution, the avoidance notch or avoidance hole passes through the thickness direction of the reference plate, so that the laser beam can pass through the avoidance portion of the reference plate to weld the workpiece to be welded.

[0026] In some embodiments of the present application, a connecting block is provided at one end of the support member away from the fixed base, and the connecting block is located below the cover plate and fixedly connected to the cover plate.

[0027] In the above technical solution, the support member extends in the height direction, and a connecting block is provided on one side of the top of the support member. The connecting block is located below the cover plate and is fixedly connected to the cover plate. This not only facilitates fixing the cover plate, but also helps to improve the stability of the cover plate installation.

[0028] In a second aspect, the present application provides a battery production line, comprising: welding equipment; and a welding fixture as described in any one of the embodiments of the first aspect, wherein the clamping assembly of the welding fixture is used to clamp a battery cell, and the laser beam of the welding equipment is suitable for passing through the avoidance portion and welding the battery cell.

[0029] According to the battery production line provided in the present application, since it includes the welding fixture described in any one of the embodiments of the first aspect, it has the technical effects of any of the above embodiments, which will not be repeated here.

[0030] 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

[0031] 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:

[0032] Figure 1 A schematic diagram of the main structure of a welding fixture provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of a top view of a welding fixture provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of the main structure of another welding fixture provided in some embodiments of the present application.

[0035] The reference numerals are as follows:

[0036] 100. Welding fixture;

[0037] 10. Fixed base; 20. Support member; 30. Cover plate; 40. Reference plate; 41. Avoidance portion; 51. Motor; 52. Screw rod; 60. Clamping assembly; 61. Transmission plate; 62. Clamping member; 621. Clamping cavity; 70. Connecting block. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. 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.

[0043] 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).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] 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.

[0046] 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.

[0047] In the related art, the power battery includes a battery cell, and the battery cell has an end cap, and the end cap is provided with a liquid injection hole for liquid injection, and the liquid injection hole is sealed by welding a sealing nail. During the sealing nail welding process, the stability of the defocus amount is an important control parameter to ensure the welding quality. If the defocus amount is unstable, it is very easy to cause insufficient welding penetration, thereby affecting the welding quality of the sealing nail.

[0048] However, the conventional welding fixture 100 used for sealing nail welding usually has a clamping assembly 60 and a lower pressure cover plate 30. The clamping assembly 60 is used to clamp the battery cell. Before welding, the battery cell is fixed to the clamping assembly 60 and remains motionless. The lower pressure cover plate 30 is driven by the cylinder to press the battery cell before welding. The pressing process is mainly determined by the height of the cylinder buffer. The cylinder buffer is prone to loosening and wear under the vibration of the lower pressure cover plate 30, resulting in changes in the distance from the output head of the welding equipment to the lower pressure cover plate 30 and the degree of defocus compression, affecting the welding quality. In addition, due to the different heights of different types of battery cells, the defocus amount needs to be re-adjusted according to the height of the battery cell each time the type is changed. The debugging process is time-consuming and the welding efficiency is low.

[0049] In order to solve the problem that the adjustment of the defocus takes a long time when the battery cell is replaced, resulting in low efficiency in sealing nail welding, the present application designs a welding fixture, by setting the cover plate in a fixed form, the cover plate is spaced apart from the fixed base by a support, and a driving assembly is provided on the fixed base, and the driving assembly is used to drive the clamping assembly for clamping the workpiece to be welded (such as a battery cell) to rise or fall, so that the workpiece to be welded rises to abut against the cover plate above, so that the laser beam of the welding equipment can pass through the avoidance portion provided by the reference plate on the cover plate and emit to the welding area of ​​the workpiece to be welded, so as to weld the workpiece to be welded. Since the position of the upper cover plate and the reference plate provided on the cover plate does not need to be adjusted, the defocus amount remains unchanged, thereby saving the time for adjusting the defocus amount during the battery cell replacement and welding process, thereby improving the welding efficiency.

[0050] The welding fixture 100 disclosed in the embodiment of the present application is not only suitable for welding sealing pins on battery cells, but can also be used for welding parts of equipment such as automobiles and ships.

[0051] See also Figure 1 and Figure 2 , Figure 1 A structural schematic diagram of a welding fixture 100 provided in some embodiments of the present application from one perspective; Figure 2 A structural schematic diagram of another perspective of a welding fixture 100 provided for some embodiments of the present application. The embodiment of the present application provides a welding fixture 100, including a fixed base 10, a support member 20, a cover plate 30, a reference plate 40 and a lifting and adjusting mechanism. Among them, the support member 20 is connected to one side of the fixed base 10 and extends in a direction away from the fixed base 10; the cover plate 30 is connected to an end of the support member 20 away from the fixed base 10, and the cover plate 30 extends in a horizontal direction and is spaced from the fixed base 10; the reference plate 40 is provided on the cover plate 30, and the reference plate 40 is provided with an avoidance portion 41 for the laser beam to pass through; the lifting and adjusting mechanism includes a driving assembly provided on the fixed base 10 and a clamping assembly 60 connected to the driving assembly, the clamping assembly 60 is provided below the reference plate 40, and is used to fix the workpiece to be welded, and the driving assembly is used to drive the clamping assembly 60 to rise or fall.

[0052] The fixed base 10 is used to be arranged on the welding platform, and is used to fix and support the driving assembly, the support member 20 and the cover plate 30 .

[0053] Exemplarily, the support member 20 is a support plate, which is disposed on one side of the fixed base 10 in the length direction and is used to connect the cover plate 30 .

[0054] The cover plate 30 is used to install the reference plate 40 and can protect the driving assembly and the clamping assembly 60 located below the cover plate 30 .

[0055] The reference plate 40 can be used as a reference for the welding plane of the welding equipment and is used to provide an escape portion 41 through which the laser beam emitted by the output head of the welding equipment can pass, so that the laser beam can be directly emitted to the welding area of ​​the workpiece to be welded.

[0056] A movable space for installing a driving assembly and providing a lifting or lowering space for the clamping assembly 60 and the workpiece to be welded may be defined between the fixed base 10 and the supporting member 20 and the cover plate 30 .

[0057] Specifically, before welding, the driving assembly is used to drive the clamping assembly 60 and the workpiece to be welded to rise or fall, so that the workpiece to be welded is against the lower surface of the substrate, and the welding area of ​​the workpiece to be welded corresponds to the position of the avoidance portion 41 set on the reference plate 40. During the welding process, since the defocus amount is determined by the height of the reference plate 40, the height position of the upper cover plate 30 and the reference plate 40 does not need to be adjusted, and the height from the output head of the welding equipment to the reference plate 40 will not change, so that the defocus amount will not change, which improves the stability of the defocus amount, thereby solving the welding quality problem caused by the change of defocus amount during welding. At the same time, when the battery cell is waiting for the welding part to be changed, since the height position of the upper cover plate 30 and the reference plate 40 does not need to be adjusted, the distance from the output head of the welding equipment to the reference plate 40 remains unchanged, and the defocus amount remains unchanged, thereby saving the time for debugging the defocus amount, so as to improve the welding efficiency, and improve the consistency of the welding effect when welding the workpieces of different specifications and models.

[0058] According to some embodiments of the present application, the driving assembly includes a driving member and a transmission member, the driving member is arranged on a fixed base 10; the transmission member is connected to the power output shaft of the driving member; wherein, the clamping assembly 60 is connected to the transmission member, and the driving member is used to drive the transmission member to move, so as to drive the clamping assembly 60 to rise or fall.

[0059] Exemplarily, the driving member can be a cylinder, and the transmission member can be a piston rod with one end provided on the cylinder and the other end protruding in the height direction. The clamping assembly 60 is connected to the other end of the piston rod. The cylinder drives the piston rod to move up and down, thereby driving the clamping assembly 60 to rise or fall.

[0060] Alternatively, the driving member may be a cylinder, and the transmission member may be a piston rod with one end provided on the cylinder and the other end protruding in the height direction. The clamping assembly 60 is connected to the other end of the piston rod, and the cylinder drives the piston rod to move up and down, thereby driving the clamping assembly 60 to rise or fall.

[0061] By connecting the transmission member to the clamping assembly 60, the transmission member can be driven to move when the driving member is running, and the clamping assembly 60 and the workpiece to be welded clamped by the clamping assembly 60 can be driven to rise or fall, so as to adjust the welding position of the workpiece to be welded, so as to facilitate the laser beam emitted by the output head of the welding equipment to pass through the avoidance portion 41 on the reference plate 40 to weld the workpiece to be welded.

[0062] See also Figure 1 According to some embodiments of the present application, the driving member includes a motor 51, and the transmission member includes a ball screw pair. One end of the screw rod 52 of the ball screw pair is connected to the power output shaft of the motor 51, and the other end is rotatably connected to the cover plate 30. The nut of the ball screw pair is provided on the clamping assembly 60, and the nut is configured to drive the clamping assembly 60 to reciprocate along the screw rod 52 when the screw rod 52 rotates.

[0063] The ball screw pair includes a screw rod 52, a nut and steel balls. The ball screw pair is a spiral transmission element with steel balls as rolling bodies between the screw rod 52 and the nut, which can convert the rotational motion of the screw rod 52 into the linear motion of the nut.

[0064] When the motor 51 drives the screw rod 52 to rotate, the nut can drive the clamping assembly 60 to reciprocate along the length of the screw rod 52. The screw rod 52 extends in the height direction, so that the nut can drive the clamping assembly 60 and the welded parts to rise or fall. The structure and principle are relatively simple and easy to implement.

[0065] See also Figure 1 According to some embodiments of the present application, the clamping assembly 60 includes a transmission plate 61 and a clamping member 62 disposed on the transmission plate 61, the transmission plate 61 is connected to the driving assembly, and the transmission plate 61 extends in a horizontal direction, and the clamping member 62 is disposed on the upper surface of the transmission plate 61.

[0066] Exemplarily, the transmission plate 61 is a flat plate that can move up and down along with the nut.

[0067] The clamping member 62 has a clamping cavity 621, and the clamping cavity 621 is used to clamp the parts to be welded.

[0068] By setting a transmission plate 61 connected to the driving assembly under the clamping plate, the transmission plate 61 extends in the horizontal direction and supports the clamping plate, thereby improving the stability of the clamping plate when moving in the height direction, and further improving the stability of the welded parts clamped by the clamping member 62 during welding.

[0069] According to some embodiments of the present application, the clamping member 62 is movably connected to the transmission plate 61 .

[0070] Exemplarily, the clamping member 62 is provided with a slide rail, the transmission plate 61 is provided with a slide groove, the slide groove extends along the length direction of the transmission plate 61, and the slide rail is slidably connected to the slide groove.

[0071] In the above technical solution, by providing a slide rail on the clamping member 62 and providing a slide groove on the transmission plate 61, the slide rail is inserted into the slide groove, so that the clamping member 62 can slide back and forth relative to the transmission plate 61 along the length direction of the transmission plate 61 to adjust the relative position of the workpiece to be welded and the avoidance portion 41, thereby facilitating the laser beam to pass through the avoidance portion 41 to weld the welding area of ​​the workpiece to be welded, which helps to improve the welding quality and welding efficiency.

[0072] See also Figure 3 , Figure 3A schematic diagram of the main structure of another welding fixture provided for some embodiments of the present application. According to some embodiments of the present application, there are two reference plates 40, which are spaced apart along the length direction of the cover plate 30; there are two clamping assemblies 60, which are connected to at least one driving assembly and are respectively arranged corresponding to the two reference plates 40.

[0073] Exemplarily, the number of the driving assembly is one, and the two clamping members 62 of the clamping assembly 60 can be supported and connected to a transmission plate 61. The two clamping members 62 can be driven to move by connecting a transmission plate 61 to the driving assembly.

[0074] By setting the number of reference plates 40 and clamping assemblies 60 to two, and setting the two clamping assemblies 60 corresponding to the two reference plates 40 respectively, each reference plate 40 is provided with an avoidance portion 41, and each clamping assembly 60 can clamp a workpiece to be welded, then at least one driving assembly is used to simultaneously drive the two clamping assemblies 60 to rise or fall, so that two workpieces to be welded can be welded at the same time, which helps to further improve the welding efficiency.

[0075] According to some embodiments of the present application, the cover plate 30 is provided with a mounting notch, and the reference plate 40 is disposed in the mounting notch and is detachably connected to the cover plate 30 .

[0076] The installation notch is a notch provided at one end of the cover plate 30 in the length direction and adapted to the shape of the reference plate 40. The reference plate 40 and the cover plate 30 can be detachably connected by bolts or screws.

[0077] The avoidance portion 41 on the reference plate 40 can have different structures, and the shape of the welding area can also be different. By setting the reference plate 40 and the cover plate 30 to be detachably connected, it is convenient to replace different reference plates 40 to adapt to different parts to be welded.

[0078] According to some embodiments of the present application, the avoidance portion 41 includes an avoidance gap or an avoidance hole.

[0079] The avoidance notches or avoidance holes pass through the thickness direction of the reference plate 40 , so that the laser beam can pass through the avoidance portion 41 of the reference plate 40 to weld the workpiece to be welded.

[0080] See also Figure 1 According to some embodiments of the present application, a connecting block 70 is provided at one end of the support member 20 away from the fixed base 10 . The connecting block 70 is located below the cover plate 30 and is fixedly connected to the cover plate 30 .

[0081] Exemplarily, the connection block 70 has a first connection surface and a second connection surface, the first connection surface is fixedly connected to the support member, and the second connection surface is fixedly connected to the cover plate.

[0082] The support member 20 extends in the height direction, and a connecting block 70 is provided on one side of the top of the support member 20 . The connecting block 70 is located below the cover plate 30 and is fixedly connected to the cover plate 30 . This not only facilitates fixing the cover plate 30 , but also helps to improve the stability of the installation of the cover plate 30 .

[0083] According to some embodiments of the present application, see Figure 1 and Figure 2 The present application provides a welding fixture 100, including a fixed base 10, a support member 20, a cover plate 30, a reference plate 40 and a lifting and lowering adjustment mechanism. Among them, the support member 20 is connected to one side of the fixed base 10 and extends in the height direction; the cover plate 30 is connected to one end of the support member 20 away from the fixed base 10 and extends in the horizontal direction; the reference plate 40 is arranged on the cover plate 30, and the reference plate 40 is provided with a avoidance portion 41 for the laser beam to pass through; the lifting and adjusting mechanism includes a motor 51 arranged on the fixed base 10, a ball screw pair connected to the power output shaft of the motor 51, and a clamping assembly 60 connected to the nut of the ball screw pair, the clamping assembly 60 is arranged below the reference plate 40, and is used to fix the welded parts, one end of the screw 52 of the ball screw pair is connected to the power output shaft of the motor 51, and the other end is rotatably connected to the cover plate 30, and the nut of the ball screw pair is connected to the clamping assembly 60, and the nut is configured to drive the clamping assembly 60 to reciprocate along the length direction of the screw 52 when the screw 52 rotates. Through the technical solution of the present application, the adjustment time of the defocus amount during welding can be saved, and the welding efficiency and welding quality can be improved.

[0084] According to some embodiments of the present application, the present application also provides a battery production line, which includes welding equipment and a welding fixture 100 as in any of the above embodiments, wherein the clamping assembly 60 of the welding fixture 100 is used to clamp the battery cell, and the laser beam of the welding equipment is suitable for passing through the avoidance portion 41 and welding the battery cell.

[0085] The battery production line provided in the present application includes the welding fixture 100 of any one of the embodiments of the first aspect, and thus has the technical effects of any of the above embodiments, which will not be described in detail herein.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A welding fixture, characterized in that: include: Fixed base; A support member connected to one side of the fixed base and extending in a direction away from the fixed base; A cover plate connected to an end of the support member away from the fixed base, and the cover plate extends in a horizontal direction and is spaced apart from the fixed base; A reference plate, arranged on the cover plate, and the reference plate is provided with an avoidance portion for allowing the laser beam to pass through; The lifting and lowering adjustment mechanism includes a driving component arranged on the fixed base and a clamping component connected to the driving component. The clamping component is arranged below the reference plate and is used to fix the workpiece to be welded. The driving component is used to drive the clamping component to rise or fall.

2. The welding fixture according to claim 1, characterized in that: The drive assembly comprises: A driving member, disposed on the fixed base; A transmission member connected to a power output shaft of the driving member; Wherein, the clamping assembly is connected to the transmission member, and the driving member is used to drive the transmission member to move so as to drive the clamping assembly to rise or fall.

3. The welding fixture according to claim 2, characterized in that: The driving member includes a motor, and the transmission member includes a ball screw pair. One end of the screw of the ball screw pair is connected to the power output shaft of the motor, and the other end is rotatably connected to the cover plate. The nut of the ball screw pair is arranged on the clamping assembly, and the nut is configured to drive the clamping assembly to reciprocate along the screw when the screw rotates.

4. The welding fixture according to claim 1, characterized in that: The clamping assembly comprises a transmission plate and a clamping member arranged on the transmission plate. The transmission plate is connected to the driving assembly and extends in a horizontal direction. The clamping member is arranged on the upper surface of the transmission plate.

5. The welding fixture according to claim 4, characterized in that: The clamping member is movably connected to the transmission plate.

6. The welding fixture according to any one of claims 1 to 5, characterized in that: The number of the reference plates is two, and the two reference plates are spaced apart along the length direction of the cover plate; The number of the clamping assemblies is two, and the two clamping assemblies are connected to at least one of the driving assemblies and are respectively arranged corresponding to the two reference plates.

7. The welding fixture according to any one of claims 1 to 5, characterized in that: The cover plate is provided with a mounting notch, the reference plate is arranged in the mounting notch and is detachably connected to the cover plate.

8. The welding fixture according to any one of claims 1 to 5, characterized in that: The avoidance portion includes an avoidance notch or an avoidance hole.

9. The welding fixture according to any one of claims 1 to 5, characterized in that: A connecting block is fixed to one end of the support member away from the fixing base. The connecting block is located below the cover plate and is fixedly connected to the cover plate.

10. A battery production line, characterized in that: include: Welding equipment; and The welding fixture according to any one of claims 1 to 9, wherein the clamping assembly of the welding fixture is used to clamp a battery cell, and the laser beam of the welding equipment is suitable for passing through the avoidance portion and welding the battery cell.

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