A welding clamp, welding system and welding method

Abstract

The application discloses a welding pressure plate, a welding system and a welding method. The welding pressure plate comprises a pressure plate body and a movable pressing arm. The pressure plate body is used for covering the end face of a welding piece. The movable pressing arm is connected to the pressure plate body. The movable pressing arm is used for pressing the welding piece through the pressure plate body. The movable pressing arm extends in a direction away from the pressure plate body and can drive the pressure plate body to move relative to the welding piece so as to change the position of the edge of the welding piece blocked by the movable pressing arm and / or the pressure plate body. Thus, the welding piece can be pressed by the movable pressing arm and the pressure plate body, the welding piece is facilitated to be welded, the stability of welding is improved, and the movable pressing arm can drive the pressure plate body to move relative to the welding piece so as to change the position of the edge of the welding piece blocked by the movable pressing arm and / or the pressure plate body. The welding piece is facilitated to be pressed while welding along the edge of the welding piece, the reliability of welding is improved, and the convenience of the welding process is improved.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a welding pressure plate, welding system and welding method. Background Technology

[0002] Welding is a process of joining two parts together. Common welding methods include gas welding, fusion welding, laser welding, ultrasonic welding, and so on.

[0003] When welding two components, the components need to be pressed together to make them fit together before welding them to fix them together. However, how to successfully weld the components while pressing them together is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] The main objective of this application is to provide a welding pressure plate, a welding system, and a welding method, which aim to solve the aforementioned technical problems existing in the prior art.

[0005] To address the technical problems existing in the prior art, this application provides a welding pressure plate, comprising a pressure plate body and a movable pressure arm. The pressure plate body is used to cover the end face of the weldment; the movable pressure arm is connected to the pressure plate body and is used to press the weldment through the pressure plate body. The movable pressure arm extends in a direction away from the pressure plate body and can drive the pressure plate body to move relative to the weldment, thereby changing the position of the edge of the weldment covered by the movable pressure arm and / or the pressure plate body. Thus, the pressure plate body covers the end face of the weldment, and the movable pressure arm is connected to the pressure plate body. The weldment can be pressed by the movable pressure arm and the pressure plate body, ensuring a tight fit between the weldment and other components, facilitating welding, improving welding stability, and allowing the pressure plate body to move relative to the weldment through the movable pressure arm, thereby changing the position of the edge of the weldment covered by the movable pressure arm and / or the pressure plate body. This facilitates welding along the edge of the weldment while pressing it, thereby improving welding reliability and the convenience of the welding process.

[0006] In some embodiments, the pressure plate body extends along a first direction, and in a second direction perpendicular to the first direction, the pressure plate body is used to cover the non-edge area of ​​the end face of the weldment. The movable pressure arm extends along the second direction. Thus, the pressure plate body extending along the first direction can shield the end face of the weldment, mitigating the risk of weld beads splattering onto the end face during welding. Furthermore, the movable pressure arm extending along the second direction ensures that the pressure plate body only covers the non-edge area of ​​the end face of the weldment in the second direction. Simply moving the pressure plate body in the first direction changes the position of the edge of the weldment shielded by the pressure plate body and the movable pressure arm, alleviating the pressure plate body's obstruction of welding along the edge of the weldment and improving welding efficiency.

[0007] In some embodiments, the movable pressure arm is centrally located at both ends relative to the pressure plate body in the first direction. Therefore, by centrally locating the movable pressure arm, the pressing effect on the weldment can be improved, and it also facilitates changing the position of the weldment edge obstructed by the movable pressure arm during movement along the first direction, alleviating the obstruction of the movable pressure arm from welding along the weldment edge and improving welding efficiency.

[0008] In some embodiments, the pressure plate body is provided with an air outlet, the opening of which is located on the end face of the pressure plate body used to press the weldment. At least one of the pressure plate body and the movable pressure arm is provided with an air inlet, which communicates with the air outlet. Thus, the pressure plate body is provided with both an air inlet and an air outlet, and the opening of the air outlet is located on the end face of the pressure plate body used to press the weldment. Gas can be output from the air inlet to the air outlet, which facilitates the airflow generated by the gas during the movement of the welding pressure plate to blow away the weld beads generated during welding away from the end face of the weldment, thereby mitigating the risk of weld beads splashing onto the end face of the weldment during welding.

[0009] In some embodiments, the pressure plate body is provided with a buffer air chamber, and the air outlet is connected to the air inlet through the buffer air chamber. Thus, the design of the buffer air chamber simplifies the connection between the air outlet and the air inlet, and also allows the airflow input from the air inlet to be divided into multiple airflow outputs, further mitigating the risk of solder balls splattering onto the end face of the welded part during welding.

[0010] In some embodiments, the welding pressure plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate being closed to form a pressure plate body; the first cover plate has a first buffer gas groove, and the second cover plate is disposed on the opening of the first buffer gas groove to form a buffer gas cavity; and / or, the second cover plate has a second buffer gas groove, and the first cover plate is disposed on the opening of the second buffer gas groove to form a buffer gas cavity. Thus, by disposing the second cover plate on the opening of the first buffer gas groove of the first cover plate, and / or disposing the first cover plate on the opening of the second buffer gas groove of the second cover plate to form a buffer gas cavity, the forming difficulty of the buffer gas cavity and the vent hole can be reduced, and production costs can be reduced.

[0011] In some embodiments, there are multiple vent holes, each connected to a buffer air chamber. Therefore, by providing multiple vent holes, each connected to a buffer air chamber, the airflow input from the inlet can be easily divided into multiple directional airflow outputs through the buffer air chamber, further mitigating the risk of solder balls splattering onto the end face of the weldment during welding.

[0012] In some embodiments, the air inlet is located on the movable pressure arm, which has a vent connecting the air inlet and the buffer gas chamber. Thus, the air outlet and the air inlet are connected through the vent and the buffer gas chamber, facilitating the guidance of airflow through the vent to the buffer gas chamber and out through the air outlet. This simplifies the connection between the air outlet and the air inlet. Furthermore, the location of the air inlet on the movable pressure arm also mitigates the risk of interference with welding when air is introduced through the air inlet.

[0013] In some embodiments, the welding pressure plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate being closed to form a movable pressure arm; the first cover plate has a first vent groove, and the second cover plate is disposed on the opening of the first vent groove to form a venting channel; and / or, the second cover plate has a second vent groove, and the first cover plate is disposed on the opening of the second vent groove to form a venting channel. Thus, by disposing the second cover plate on the opening of the first vent groove of the first cover plate, and / or disposing the first cover plate on the opening of the second buffer vent groove of the second cover plate to form a venting channel, the forming difficulty of the venting channel and the air inlet can be reduced, and production costs can be reduced.

[0014] In some embodiments, the welding pressure plate includes a first cover plate and a second cover plate. The first cover plate includes a first main body portion and a second main body portion connected to each other, and the second cover plate includes a third main body portion and a fourth main body portion connected to each other. The first main body portion covers the third main body portion to form a pressure plate body, and the second main body portion covers the fourth main body portion to form a movable pressure arm. Thus, the pressure plate body and the movable pressure arm are formed by the first and second cover plates, which simplifies the molding difficulty of the pressure plate body and the movable pressure arm, further reduces the molding difficulty of the vent and the air inlet, and lowers production costs.

[0015] In some embodiments, the first main body has a first buffer air groove, the second main body has a first vent groove communicating with the first buffer air groove, the third main body covers the opening of the first buffer air groove to form a buffer air cavity, and the fourth main body covers the opening of the first vent groove to form a venting channel; and / or, the third main body has a second buffer air groove, the fourth main body has a second vent groove communicating with the second buffer air groove, the third main body covers the opening of the second buffer air groove to form a buffer air cavity, and the second main body covers the opening of the second vent groove to form a venting channel. Therefore, by simultaneously forming the interconnected first buffer air groove and the first vent groove on the first cover plate, and / or simultaneously forming the interconnected second buffer air groove and the second vent groove on the second cover plate, the molding difficulty of the venting channel, air inlet, air outlet, and buffer air cavity can be reduced, and production costs can be reduced.

[0016] To address the technical problems existing in the prior art, this application also provides a welding system, which includes a welding device and the aforementioned welding pressure plate. The welding pressure plate is used to press the workpiece, and the welding device is used to weld the workpiece along its edge.

[0017] To address the technical problems existing in the prior art, this application also provides a welding method applied to the aforementioned welding system. The welding method includes: a movable pressure arm pressing the end face of the workpiece against a pressure plate body; a welding device welding the workpiece along its edge; and during the welding process, the movable pressure arm moves the pressure plate body relative to the workpiece to change the position of the edge of the workpiece obscured by the movable pressure arm and / or the pressure plate body. Thus, by moving the pressure arm and the pressure plate body to press the workpiece, the workpiece is made to fit tightly against other components, facilitating welding and improving welding stability. Furthermore, during the welding process, the position of the edge of the workpiece obscured by the movable pressure arm and / or the pressure plate body can be changed by moving the movable pressure arm, facilitating welding along the edge of the workpiece while pressing it, thereby improving welding reliability and the convenience of the welding process.

[0018] In some embodiments, the step of moving the pressure arm to move the pressure plate body relative to the weldment includes: moving the pressure arm to space the pressure plate body from the end face of the weldment; and moving the pressure arm to move the pressure plate body relative to the weldment while the pressure plate body is spaced from the end face of the weldment. Therefore, by moving the pressure arm to move the pressure plate body relative to the weldment while the pressure plate body and the end face of the weldment are spaced apart, the risk of damage to the weldment and the welding pressure plate due to friction with the weldment during movement can be mitigated, thereby improving welding efficiency and yield.

[0019] In some embodiments, after the step of moving the pressure arm to space the pressure plate body from the end face of the workpiece, the welding method further includes: inputting a positive pressure airflow into the air outlet of the pressure plate body through the air inlet of at least one of the pressure plate body and the moving pressure arm. Thus, outputting a positive pressure airflow from the air inlet to the air outlet facilitates the blowing of weld beads generated during welding away from the end face of the workpiece during the movement of the welding pressure plate, mitigating the risk of weld beads splattering onto the end face of the workpiece during welding.

[0020] In some embodiments, the pressure plate body extends along a first direction, and in a second direction perpendicular to the first direction, the pressure plate body is used to cover the non-edge area of ​​the end face of the weldment. The movable pressure arm extends along the second direction. The step of the movable pressure arm driving the pressure plate body to move relative to the weldment includes: if it is detected that the welding device is welding from a first point to a second point along the welding direction; wherein the first point is closer to the movable pressure arm in the welding direction than the second point; the movable pressure arm then drives the pressure plate body to move from a first position to a second position along the first direction; wherein the first position includes: a position in the welding direction where the movable pressure arm is located outside the first and second points, and the second position includes: a position in the welding direction where the movable pressure arm covers the first and second points. Thus, after the welding device welds from the first point to the second point, the movable pressure arm rotates from the first position to the second position to change the position covered by the movable pressure arm and the pressure plate body from the first position that has never been welded to the second position that has been welded, thereby continuously pressing the weldment through the pressure plate without affecting the welding, which can improve welding efficiency.

[0021] In some embodiments, the extension length of the pressure plate body in the first direction is greater than the extension length of the end face of the weldment in the first direction; at the first position, the pressure plate body does not obstruct the edge of the weldment between the first and second points in the first direction; at the second position, the pressure plate body does not obstruct the edge of the weldment between the first and second points in the opposite direction of the first direction. Thus, by obstructing the end face of the weldment with the pressure plate body, the risk of weld beads splattering onto the end face of the weldment during welding can be mitigated. Furthermore, simply moving the pressure plate body in the first direction changes the position of the edge of the weldment obstructed by the pressure plate body and the moving pressure arm, reducing the obstruction of the pressure plate body to welding along the edge of the weldment and improving welding efficiency.

[0022] In some embodiments, the step of welding the workpiece along its edge using a welding device includes: the welding device welding along the edge of the workpiece to form a closed welding trajectory; the welding device welding along the closed trajectory to a third point to form a finishing trajectory; wherein the third point is either on or outside the welding trajectory. Thus, after achieving a closed welding trajectory, welding continues to the third point, making the entire welding trajectory more complete and the welding stability higher. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the structure of a battery cell according to one or more embodiments;

[0025] Figure 2 This is a schematic diagram of a welding pressure plate pressed against an pole post cover plate according to one or more embodiments;

[0026] Figure 3 This is a schematic diagram of a welding pressure plate pressing on a welded part according to one or more embodiments;

[0027] Figure 4 This is a first structural schematic diagram of a welding pressure plate according to one or more embodiments;

[0028] Figure 5 yes Figure 4 A cross-sectional view of the welding pressure plate shown along the AA direction;

[0029] Figure 6 This is a schematic diagram of the second structure of a welding pressure plate according to one or more embodiments;

[0030] Figure 7 yes Figure 6 The diagram shows a structural schematic of the welding pressure plate with a portion of the second cover plate removed.

[0031] Figure 8 yes Figure 6 The diagram shows a structural schematic of the welding pressure plate with a portion of the first cover plate removed.

[0032] Figure 9 It is a schematic block diagram of a welding system according to one or more embodiments;

[0033] Figure 10 This is a schematic flowchart of a welding method according to one or more embodiments;

[0034] Figure 11 This is a schematic diagram of a welding plate pressing a weldment at a first position according to one or more embodiments;

[0035] Figure 12 This is a schematic diagram of a welding plate pressing a weldment at a second position according to one or more embodiments.

[0036] Reference numerals: 1. Battery cell; 2. Terminal cover plate; 3. Terminal body; 4. Casing; 5. Welded parts;

[0037] Welding pressure plate 10; pressure plate body 100; air outlet 110; buffer air chamber 120; movable pressure arm 200; air inlet 210; air passage 220; first cover plate 300; first main body 310; first buffer air groove 311; second main body 320; first air passage 321; second cover plate 400; third main body 410; second buffer air groove 411; fourth main body 420; second air passage 421; first direction X1; second direction X2;

[0038] Welding system 20; welding device 30; first point A1; second point A2; third point A3; welding direction Y. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0045] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0047] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0048] Batteries can be used in electrical devices to enable them to perform corresponding functions using electrical energy supplied by the battery. These devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0049] The electrical device can be a vehicle, which includes a battery. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The battery is installed inside the vehicle, and can be located at the bottom, front, or rear of the vehicle. The battery can be used to power the vehicle; for example, the battery can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery's power supply to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this application, the battery can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0050] The shape of the battery can be, but is not limited to, square, cylindrical, or any other arbitrary shape.

[0051] In some embodiments, the battery may include a housing and multiple battery cells, with the battery cells housed within the housing. The housing provides space for the battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that some battery cells are connected in series while others are connected in parallel. Alternatively, the battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the battery cells is housed within the housing. Of course, the battery can also be composed of multiple battery cells first connected in series, parallel, or a combination thereof to form a battery module, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is then housed within the housing.

[0052] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a battery cell according to one or more embodiments.

[0053] A battery cell 1 refers to the smallest unit that makes up a battery. Battery cell 1 may include a casing 4, electrode assemblies, and other functional components. The casing 4 forms an internal environment that accommodates the electrode assemblies, which are located within this internal environment. The electrode assemblies are the components in battery cell 1 where electrochemical reactions occur, and the casing may contain one or more electrode assemblies. The electrode assemblies are mainly formed by winding or stacking positive and negative electrode plates, and typically, a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode posts to form a current loop.

[0054] To improve the performance of the battery cell 1, this application provides a novel battery cell 1, which includes an electrode post that is hollow. Specifically, the electrode post may include an electrode post body 3 and an electrode post cover plate 2. The electrode post body 3 is annular and protrudes from the end wall of the outer casing 4. The portion of the outer casing 4 surrounding the electrode post body 3 is recessed inward to form a hollow groove. The bottom wall of the hollow groove has an opening for the tabs of the electrode assembly to pass through into the hollow groove. The portion of the electrode assembly located in the hollow groove contacts and conducts electricity with the electrode post body 3. The pole cover plate 2 can be placed over the opening of the hollow groove to seal the hollow groove. Specifically, an annular boss can be provided on the side wall of the hollow groove, and the pole cover plate 2 overlaps on the annular boss so that the pole cover plate 2 covers the opening of the hollow groove. Furthermore, the surface of the pole cover plate 2 away from the bottom wall of the hollow groove can be in the same plane as the surface of the pole body 3 away from the bottom wall of the hollow groove, so as to facilitate welding along the outer edge of the pole cover plate 2 and the inner edge of the pole body 3, so as to fix the pole cover plate 2 and the pole body 3 together.

[0055] See Figure 2 , Figure 2 This is a schematic diagram of a welding pressure plate pressed onto an electrode cover plate according to one or more embodiments.

[0056] When it is necessary to weld the pole cover plate 2 and the pole body 3, the welding pressure plate 10 can be pressed down on the pole cover plate 2 to make the pole cover plate 2 and the pole body 3 fit together, and then the pole cover plate 2 and the pole body 3 can be welded together to fix the pole cover plate 2 and the pole body 3 together.

[0057] For example, when it is necessary to weld the pole cover plate 2 and the pole body 3, the pole cover plate 2 is first placed over the opening of the hollow groove, and then the welding pressure plate 10 is placed on the end face of the pole cover plate 2. The welding pressure plate 10 can be applied downward by other tooling equipment or manually to make the pole cover plate 2 and the pole body 3 fit tightly together. Then, welding is performed along the upper edge where the pole cover plate 2 and the pole body 3 fit together to fix the pole cover plate 2 and the pole body 3 together.

[0058] Specifically, the welding process can be a one-time operation. For example, during the welding process, the position of the electrode cover plate 2, which is shielded by the welding component, can be changed to complete the welding operation between the electrode cover plate 2 and the electrode body 3 without interruption. There can be two electrode posts on the battery cell 1, and the electrode cover plates 2 and electrode bodies 3 of both electrode posts can be fixed by welding. In actual operation, one electrode cover plate 2 can be pressed down by a welding pressure plate 10 first, and after completing the welding operation between the electrode cover plate 2 and electrode body 3 of one electrode post, the welding operation between the electrode cover plate 2 and electrode body 3 of the other electrode post can be performed. Alternatively, two welding pressure plates 10 can be used to press down the electrode cover plates 2 of both electrode posts simultaneously, and then the welding operation between the electrode cover plates 2 and electrode bodies 3 of both electrode posts can be performed simultaneously.

[0059] In order to alleviate the obstruction of the welding position by the welding plate 10 while pressing the welding part 5, this application provides a welding plate, see [link to relevant documentation]. Figure 3 , Figure 3 This is a schematic diagram of a welding plate pressing against a welded component according to one or more embodiments.

[0060] The welding pressure plate 10 includes a pressure plate body 100 and a movable pressure arm 200. The pressure plate body 100 is used to cover the end face of the welding component 5. The welding component 5 can be the aforementioned pole cover plate 2. Of course, in other application scenarios, the welding component 5 can also be other components that need to be welded. The pressure plate body 100 can be plate-shaped, and the shape of the pressure plate body 100 can be arbitrary. For example, the end face of the pressure plate body 100 can be circular, elliptical, racetrack-shaped, polygonal, etc. Specifically, the shape of the end face of the pressure plate body 100 can be similar to the shape of the end face of the welding component 5 pressed by the pressure plate body 100. For example, when the end face of the welding component 5 is pressed is racetrack-shaped, the end face of the pressure plate body 100 used to press the welding component 5 can be racetrack-shaped. Similarly, when the end face of the welding component 5 is pressed is circular, the end face of the pressure plate body 100 used to press the welding component 5 can be circular.

[0061] The movable pressure arm 200 is connected to the pressure plate body 100. The movable pressure arm 200 is used to press the weldment 5 through the pressure plate body 100. The movable pressure arm 200 extends in a direction away from the pressure plate body 100 and can drive the pressure plate body 100 to move relative to the weldment 5, thereby changing the position of the edge of the weldment 5 obscured by the movable pressure arm 200 and / or the pressure plate body 100. The movement of the pressure plate body 100 relative to the weldment 5 by the movable pressure arm 200 can be understood as a translation of the movable pressure arm 200 relative to the end face of the weldment 5. External force can be applied to the movable pressure arm 200 by other tooling equipment or manually to cause the movable pressure arm 200 to drive the pressure plate body 100 to move relative to the weldment 5.

[0062] The movable pressure arm 200 can be fixedly connected to or detachably connected to the pressure plate body 100. For example, the movable pressure arm 200 can be integrally formed with the pressure plate body 100, allowing for a fixed connection and facilitating the movement of the pressure plate body 100 along with the movable pressure arm 200. Alternatively, the movable pressure arm 200 can be sleeved onto the pressure plate body 100, allowing for a detachable connection. Alternatively, the movable pressure arm 200 can also be detachably or fixedly connected to the pressure plate body 100 via other components. The movable pressure arm 200 extends in a direction away from the pressure plate body 100; for example, it can extend along the side wall of the pressure plate body 100, facilitating the application of downward pressure to the movable pressure arm 200, causing it to press the welded part 5 through the pressure plate body 100. For example, the movable pressure arm 200 is connected to the side of the pressure plate body 100 away from the welded part 5, and extends in a direction away from the welded part 5.

[0063] During the welding process, the pressure plate body 100 and / or the movable pressure arm 200 may obstruct the area to be welded. In this case, the pressure plate body 100 can be moved relative to the weldment 5 by the movable pressure arm 200, thereby changing the position of the edge of the weldment 5 obstructed by the movable pressure arm 200 and / or the pressure plate body 100. For example, the movable pressure arm 200 is connected to the side of the pressure plate body 100 away from the weldment 5 and extends in a direction away from the weldment 5. The area of ​​the end face of the pressure plate body 100 used to cover the weldment 5 is larger than the area of ​​the end face of the weldment 5. In this case, when the pressure plate body 100 covers the end face of the weldment 5, the pressure plate body 100 will obstruct the position of the edge of the weldment 5, while the movable pressure arm 200 will not obstruct the position of the edge of the weldment 5. The position of the edge of the weldment 5 obstructed by the pressure plate body 100 can be changed by moving the pressure plate body 100 relative to the weldment 5 by the movable pressure arm 200. For example, the movable pressure arm 200 can be extended along the side wall of the pressure plate body 100. The area of ​​the pressure plate body 100 used to cover the end face of the welded part 5 is smaller than the area of ​​the end face of the welded part 5. At this time, when the pressure plate body 100 covers the end face of the welded part 5, the pressure plate body 100 will not block the position of the edge of the welded part 5, while the movable pressure arm 200 will block the position of the edge of the welded part 5. The pressure plate body 100 can be moved relative to the welded part 5 by the movable pressure arm 200 to change the position of the edge of the welded part 5 blocked by the movable pressure arm 200. For example, the movable pressure arm 200 can be extended along the side wall of the pressure plate body 100. The area of ​​the pressure plate body 100 used to cover the end face of the welded part 5 is larger than the area of ​​the end face of the welded part 5. At this time, when the pressure plate body 100 covers the end face of the welded part 5, both the pressure plate body 100 and the movable pressure arm 200 will block the position of the edge of the welded part 5. The pressure plate body 100 can be moved relative to the welded part 5 by the movable pressure arm 200 to change the position of the edge of the welded part 5 blocked by the movable pressure arm 200 and the pressure plate body 100.

[0064] In the above embodiments, the pressure plate body 100 is used to cover the end face of the welded part 5, and the movable pressure arm 200 is connected to the pressure plate body 100. The movable pressure arm 200 and the pressure plate body 100 can press the welded part 5 so that the welded part 5 is closely attached to other components, which facilitates welding of the welded part 5 and improves the stability of welding. Furthermore, the movable pressure arm 200 can drive the pressure plate body 100 to move relative to the welded part 5, thereby changing the position of the edge of the welded part 5 covered by the movable pressure arm 200 and / or the pressure plate body 100. This facilitates welding along the edge of the welded part 5 while pressing the welded part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0065] Furthermore, the pressure plate body 100 extends along the first direction X1, and in the second direction X2 perpendicular to the first direction X1, the pressure plate body 100 is used to cover the non-edge area of ​​the end face of the welded part 5, and the movable pressure arm 200 extends along the second direction X2. The pressure plate body 100 extends along the first direction X1, meaning its size in the first direction X1 is larger than its size in the second direction X2. For example, the pressure plate body 100 used to cover the end face of the welded part 5 can be rectangular, racetrack-shaped, etc. The end face of the welded part 5 can also extend along the first direction X1, and the shape of the end face of the pressure plate body 100 can be similar to the shape of the end face of the welded part 5 pressed by the pressure plate body 100, for example, both end faces can be rectangular or racetrack-shaped, etc. In the second direction X2, the size of the end face of the welded part 5 can be slightly larger than the size of the end face of the pressure plate body 100, so that when the pressure plate body 100 covers the end face of the welded part 5, it can cover the non-edge area of ​​the end face of the welded part 5. The movable pressure arm 200 extends along the second direction X2, and the width of the movable pressure arm 200 in the first direction X1 is smaller. When the pressure plate body 100 presses on the end face of the welded part 5, the part of the edge of the welded part 5 that is blocked includes: the part of the edge blocked by the pressure plate body 100 in the first direction X1 and the part of the edge blocked by the movable pressure arm 200 in the second direction X2. At this time, it is only necessary to move the pressure plate body 100 in the first direction X1 by moving the movable pressure arm 200 to change the position of the edge blocked by the pressure plate body 100 and the movable pressure arm 200. Therefore, the pressure plate body 100 extends along the first direction X1, which can shield the end face of the weldment 5, reducing the risk of weld beads splashing onto the end face of the weldment 5 during welding. Furthermore, the movable pressure arm 200 extends along the second direction X2, and the pressure plate body 100 only covers the non-edge area of ​​the end face of the weldment 5 in the second direction X2. By simply moving the pressure plate body 100 in the first direction X1, the position of the edge of the weldment 5 shielded by the pressure plate body 100 and the movable pressure arm 200 can be changed, reducing the obstruction of the pressure plate body 100 from welding along the edge of the weldment 5 and improving the welding efficiency.

[0066] Furthermore, the movable pressure arm 200 is centrally positioned at both ends relative to the pressure plate body 100 in the first direction X1. The movable pressure arm 200 has a smaller width in the first direction X1, and the connection between the movable pressure arm 200 and the pressure plate body 100 is located in the middle position of the pressure plate body 100 in the first direction X1. Therefore, by centrally positioning the movable pressure arm 200, the pressing effect of pressing the weldment 5 can be improved, and it is also convenient to change the position of the edge of the weldment 5 obstructed by the movable pressure arm 200 during the movement along the first direction X1, thereby alleviating the obstruction of the movable pressure arm 200 from the welding operation along the edge of the weldment 5 and improving the welding efficiency.

[0067] Combination Figure 4 and Figure 5 , Figure 4This is a first structural schematic diagram of a welding pressure plate according to one or more embodiments. Figure 5 yes Figure 4 The diagram shows a cross-section of the welding pressure plate along the AA direction.

[0068] The pressure plate body 100 is provided with an air outlet 110, the opening of which is located on the end face of the pressure plate body 100 used to press the welded part 5. At least one of the pressure plate body 100 and the movable pressure arm 200 is provided with an air inlet 210, which communicates with the air outlet 110. The opening of the air inlet 210 can be located on the pressure plate body 100 and / or the movable pressure arm 200. For example, there is one air inlet 210, and its opening can be located on the pressure plate body 100 or the movable pressure arm 200. When there are multiple air inlets 210, their openings can be simultaneously distributed on the pressure plate body 100 and the movable pressure arm 200. To facilitate manufacturing and to allow airflow through the air inlet 210, the opening of the air inlet 210 can be located on the side of the pressure plate body 100 away from the end face of the welding part 5, and / or on the side of the movable pressure arm 200 away from the end face of the welding part 5. The air inlet 210 is connected to the air outlet 110, allowing airflow to enter through the air inlet 210 and exit through the air outlet 110. For example, positive pressure airflow can be input into the air inlet 210, and the positive pressure airflow flows in through the air outlet 110. Thus, the pressure plate body 100 is provided with both the air inlet 210 and the air outlet 110, and the opening of the air outlet 110 is located on the end face of the pressure plate body 100 used to press the welding part 5. Gas can be output from the air inlet 210 to the air outlet 110, so that during the movement of the welding pressure plate 10, the airflow generated by the gas can blow away the welding beads generated during welding away from the end face of the welding part 5, mitigating the risk of welding beads splashing onto the end face of the welding part 5 during welding.

[0069] Furthermore, the pressure plate body 100 is provided with a buffer air cavity 120, and the air outlet 110 is connected to the air inlet 210 through the buffer air cavity 120. The pressure plate body 100 may have an internal hollow structure, and the hollow cavity is used to form the buffer air cavity 120. Both the air outlet 110 and the air inlet 210 can be directly connected to the buffer air cavity 120. For example, the opening of the air outlet 110 is located on the side of the pressure plate body 100 used to press the end face of the welded part 5, and is directly connected to the buffer air cavity 120; the opening of the air inlet is located on the side of the pressure plate body 100 away from the end face of the welded part 5, and is directly connected to the buffer air cavity 120. The air inlet 210 can also be connected to the buffer air cavity 120 through other air passages, and thus the air inlet 210 and the air outlet 110 can be connected through the buffer air cavity 120. Therefore, by designing the buffer air chamber 120, the connection between the air outlet 110 and the air inlet 210 can be simplified. Furthermore, the air inlet 210 can be divided into multiple airflow outputs through the buffer air chamber 120, further mitigating the risk of weld beads splashing onto the end face of the welded part 5 during welding.

[0070] Furthermore, there are multiple vents 110, each of which is connected to a buffer air chamber 120. The number and arrangement of the vents 110 can be set according to actual conditions, such as 12, 14, 16, 18, etc. The multiple vents 110 can be divided into two rows, with the two rows of vents 110 arranged alternately, and the multiple vents 110 in each row arranged at equal intervals, etc. Multiple air outlets 110 are connected to the buffer air chamber 120. When positive pressure airflow is input from the air inlet 210, the airflow can first pass through the buffer air chamber 120, and then be diverted and discharged through the buffer air chamber 120 and the air outlets 110. Thus, by setting multiple air outlets 110, and each of the multiple air outlets 110 is connected to the buffer air chamber 120, it is convenient to divide the airflow input from the air inlet 210 into multiple directions of airflow output through the buffer air chamber 120, further mitigating the risk of weld beads splashing onto the end face of the welded part 5 during welding.

[0071] In some embodiments, an air inlet 210 is provided on a movable pressure arm 200, and the movable pressure arm 200 is provided with a vent 220 connecting the air inlet 210 and the buffer air chamber 120. The opening of the air inlet 210 may be located on the side of the movable pressure arm 200 away from the end face of the pressing and welding part 5. The movable pressure arm 200 may have an internal hollow structure, and the hollow cavity is used to form the vent 220. One end of the vent 220 is connected to the air inlet 210, and the other end is connected to the buffer air chamber 120. Airflow can flow sequentially through the air inlet 210, the vent 220, the buffer air chamber 120, and the air outlet 110. Therefore, the air outlet 110 and the air inlet 210 are connected through the ventilation channel 220 and the buffer air chamber 120, which facilitates the airflow to be guided to the buffer air chamber 120 through the ventilation channel 220 and flow out through the air outlet 110. It also simplifies the connection between the air outlet 110 and the air inlet 210. Furthermore, since the air inlet 210 is located on the moving pressure arm 200, it can also mitigate the risk of interference with welding when air is introduced through the air inlet 210.

[0072] See Figures 6 to 8 , Figure 6 This is a schematic diagram of the second structure of a welding pressure plate according to one or more embodiments. Figure 7 yes Figure 6 The diagram shows a welded pressure plate with a portion of the second cover plate removed. Figure 8 yes Figure 6 The diagram shows a structural schematic of the first cover plate with a portion of the welded pressure plate removed.

[0073] The welding pressure plate 10 includes a first cover plate 300 and a second cover plate 400, which can be closed to form a pressure plate body 100 and / or a movable pressure arm 200.

[0074] In some embodiments, the first cover plate 300 and the second cover plate 400 are closed to form the pressure plate body 100. In this embodiment, the first cover plate 300 and the second cover plate 400 are closed to form the pressure plate body 100, and the movable pressure arm 200 can be an integral structure. For example, the movable pressure arm 200 can be an integral structure. After the first cover plate 300 and the second cover plate 400 are closed to form the pressure plate body 100, the first cover plate 300 and the second cover plate 400 are respectively fixedly connected to the movable pressure arm 200. Alternatively, the movable pressure arm 200 can also be formed by closing two cover plates. For example, when the first cover plate 300 and the second cover plate 400 are closed, they simultaneously form the movable pressure arm 200 and the pressure plate body 100.

[0075] The first cover plate 300 has a first buffer air groove 311, and the second cover plate 400 covers the opening of the first buffer air groove 311 to form a buffer air cavity 120; and / or, the second cover plate 400 has a second buffer air groove 411, and the first cover plate 300 covers the opening of the second buffer air groove 411 to form a buffer air cavity 120. The first cover plate 300 can be recessed inward to form the first buffer air groove 311, and the second cover plate 400 can be recessed inward to form the second buffer air groove 411. In one embodiment, the first buffer air groove 311 can be provided only on the first cover plate 300. When the first cover plate 300 and the second cover plate 400 are covered to form the pressure plate body 100, the second cover plate 400 covers the opening of the first buffer air groove 311 to seal the opening of the first buffer air groove 311 to form the buffer air cavity 120. In another embodiment, the second buffer air groove 411 can be provided only on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 are covered to form the pressure plate body 100, the first cover plate 300 covers the opening of the second buffer air groove 411, sealing the opening of the second buffer air groove 411 to form the buffer air cavity 120. In yet another embodiment, the first buffer air groove 311 can be formed on the first cover plate 300, and the second buffer air groove 411 can be formed on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 are covered to form the pressure plate body 100, the first cover plate 300 covers the opening of the second buffer air groove 411, sealing the opening of the second buffer air groove 411, and the second cover plate 400 covers the opening of the first buffer air groove 311, sealing the opening of the second buffer air groove 411, so that the first buffer air groove 311 and the second buffer air groove 411 together form the buffer air cavity 120. Therefore, by covering the first buffer air groove 311 of the first cover plate 300 with the second cover plate 400, and / or covering the second buffer air groove 411 of the second cover plate 400 with the first cover plate 300 to form the buffer air cavity 120, the molding difficulty of the buffer air cavity 120 and the air outlet 110 can be reduced, and the production cost can be reduced.

[0076] In some embodiments, the first cover plate 300 and the second cover plate 400 are closed to form a movable pressure arm 200. In this embodiment, the first cover plate 300 and the second cover plate 400 are closed to form the movable pressure arm 200. The pressure plate body 100 can be an integral structure. For example, the pressure plate body 100 can be an integral structure. After the first cover plate 300 and the second cover plate 400 are closed to form the movable pressure arm 200, the first cover plate 300 and the second cover plate 400 are respectively fixedly connected to the pressure plate body 100. Alternatively, the pressure plate body 100 can also be formed by closing two cover plates. For example, the first cover plate 300 and the second cover plate 400 simultaneously form the movable pressure arm 200 and the pressure plate body 100 when closed.

[0077] The first cover plate 300 has a first vent groove 321, and the second cover plate 400 covers the opening of the first vent groove 321 to form a vent 220; and / or, the second cover plate 400 has a second vent groove 421, and the first cover plate 300 covers the opening of the second vent groove 421 to form a vent 220. The first cover plate 300 may be recessed inward to form the first vent groove 321, and the second cover plate 400 may be recessed inward to form the second vent groove 421. In one embodiment, the first vent groove 321 may be provided only on the first cover plate 300. When the first cover plate 300 and the second cover plate 400 are used to form the movable pressure arm 200, the second cover plate 400 covers the opening of the first vent groove 321, sealing the opening of the first vent groove 321 to form the vent 220. In another embodiment, a second vent groove 421 may be provided only on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 are used to form the movable pressure arm 200, the first cover plate 300 covers the opening of the second vent groove 421, sealing the opening of the second vent groove 421 to form a vent 220. In yet another embodiment, a first vent groove 321 may be formed on the first cover plate 300, and a second vent groove 421 may be formed on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 are used to form the movable pressure arm 200, the first cover plate 300 covers the opening of the second vent groove 421, sealing the opening of the second vent groove 421, and the second cover plate 400 covers the opening of the first vent groove 321, sealing the opening of the second vent groove 421, so that the first vent groove 321 and the second vent groove 421 together form a vent 220. Therefore, by covering the first venting groove 321 of the first cover plate 300 with the second cover plate 400, and / or covering the second buffer groove 411 of the second cover plate 400 with the first cover plate 300 to form the venting channel 220, the forming difficulty of the venting channel 220 and the air inlet 210 can be reduced, and the production cost can be reduced.

[0078] In some embodiments, the welding pressure plate 10 includes a first cover plate 300 and a second cover plate 400. The first cover plate 300 includes a first main body portion 310 and a second main body portion 320 connected to each other. The second cover plate 400 includes a third main body portion 410 and a fourth main body portion 420 connected to each other. The first main body portion 310 covers the third main body portion 410 to form a pressure plate body 100, and the second main body portion 320 covers the fourth main body portion 420 to form a movable pressure arm 200. The first cover plate 300 and the second cover plate 400 are separately disposed. The first cover plate 300 and the second cover plate 400 may have the same shape, such as both being T-shaped. The first main body portion 310 and the third main body portion 410 may have the same shape and size, and the second main body portion 320 and the fourth main body portion 420 may have the same shape and size. When the first cover plate 300 is placed on the second cover plate 400, the edges of the first cover plate 300 and the edges of the second cover plate 400 may be completely fitted together to form the pressure plate body 100 and the movable pressure arm 200. The first cover plate 300 and the second cover plate 400 can be detachably connected or fixedly connected. For example, screw holes can be made in the first cover plate 300 and the second cover plate 400, and studs can be inserted through the screw holes to make the first cover plate 300 and the second cover plate 400 detachably connected. Alternatively, after the first cover plate 300 and the second cover plate 400 are installed, they can be welded along their edges to make the first cover plate 300 and the second cover plate 400 fixedly connected. Thus, the pressure plate body 100 and the movable pressure arm 200 are formed by the first cover plate 300 and the second cover plate 400, which simplifies the molding difficulty of the pressure plate body 100 and the movable pressure arm 200, further reduces the molding difficulty of the air passage 220 and the air inlet 210, and reduces production costs.

[0079] Furthermore, the first main body 310 has a first buffer air groove 311, the second main body 320 has a first venting groove 321 communicating with the first buffer air groove 311, the third main body 410 covers the opening of the first buffer air groove 311 to form a buffer air cavity 120, and the fourth main body 420 covers the opening of the first venting groove 321 to form a venting channel 220. And / or, the third main body 410 has a second buffer air groove 411, the fourth main body 420 has a second venting groove 421 communicating with the second buffer air groove 411, the third main body 410 covers the opening of the second buffer air groove 411 to form a buffer air cavity 120, and the second main body 320 covers the opening of the second venting groove 421 to form a venting channel 220. An air outlet 110 can be provided on the bottom wall of the first buffer air groove 311, and an air inlet 210 can be provided on the fourth main body 420 and communicate with the second venting groove 421.

[0080] The first cover plate 300 can be recessed inward to form a first buffer air groove 311 and a first venting groove 321, which are interconnected. The second cover plate 400 can be recessed inward to form a second buffer air groove 411 and a second venting groove 421, which are interconnected. In one embodiment, the first buffer air groove 311 and the first venting groove 321 can be provided only on the first cover plate 300. When the first cover plate 300 and the second cover plate 400 cover and form the pressure plate body 100 and the movable pressure arm 200, the second cover plate 400 covers the opening of the first buffer air groove 311 and the opening of the first venting groove 321, sealing the opening of the first buffer air groove 311 and the opening of the first venting groove 321 to form a buffer air cavity 120 and a venting channel 220. In another embodiment, the second buffer air groove 411 and the second venting groove 421 may be provided only on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 cover the pressure plate body 100 and the movable pressure arm 200, the first cover plate 300 covers the opening of the second buffer air groove 411 and the opening of the second venting groove 421, sealing the opening of the second buffer air groove 411 and the opening of the second venting groove 421 to form the buffer air cavity 120 and the venting channel 220. In another embodiment, a first buffer air groove 311 and a first venting groove 321 can be formed on the first cover plate 300, and a second buffer air groove 411 and a second venting groove 421 can be formed on the second cover plate 400. When the first cover plate 300 and the second cover plate 400 cover the pressure plate body 100 and the movable pressure arm 200, the first cover plate 300 covers the opening of the second buffer air groove 411 and the opening of the second venting groove 421, sealing the opening of the second buffer air groove 411 and the opening of the second venting groove 421. The second cover plate 400 covers the opening of the first buffer air groove 311 and the opening of the first venting groove 321, sealing the opening of the first buffer air groove 311 and the opening of the first venting groove 321, so that the first buffer air groove 311 and the second buffer air groove 411 together form a buffer air cavity 120, and the first venting groove 321 and the second venting groove 421 together form a venting channel 220. Therefore, by simultaneously forming a first buffer air groove 311 and a first venting groove 321 that are interconnected on the first cover plate 300, and / or simultaneously forming a second buffer air groove 411 and a second venting groove 421 that are interconnected on the second cover plate, the molding difficulty of the venting channel 220, the air inlet 210, the air outlet 110 and the buffer air cavity 120 can be reduced, and the production cost can be reduced.

[0081] In summary, the pressure plate body 100 is used to cover the end face of the welded part 5, and the movable pressure arm 200 is connected to the pressure plate body 100. The movable pressure arm 200 and the pressure plate body 100 can press the welded part 5 to make the welded part 5 fit tightly with other components, which facilitates welding of the welded part 5 and improves the stability of welding. Furthermore, the movable pressure arm 200 can drive the pressure plate body 100 to move relative to the welded part 5 to change the position of the edge of the welded part 5 covered by the movable pressure arm 200 and / or the pressure plate body 100, which facilitates welding along the edge of the welded part 5 while pressing the welded part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0082] To address the technical problems existing in the relevant embodiments, this application also provides a welding system, see [link to relevant documentation]. Figure 9 , Figure 9 It is a schematic block diagram of a welding system according to one or more embodiments.

[0083] The welding system 20 includes a welding device 30 and a welding pressure plate 10 in any of the above embodiments. The welding pressure plate 10 is used to press the weldment 5, and the welding device 30 is used to weld the weldment 5 along the edge of the weldment 5.

[0084] The welding device 30 can be a laser welding device, which offers high welding efficiency and safety. Laser welding heats the surface to be processed through laser radiation. The surface heat diffuses inward through heat conduction. By controlling laser parameters such as the width, energy, peak power, and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool, thereby welding two parts together. Of course, in other embodiments, the welding device 30 may include, but is not limited to, gas welding devices, fusion welding devices, ultrasonic welding devices, etc. The welding system 20 may also include other devices, such as a pressing device, a conveying device, etc. The pressing device can be used to press the movable pressure arm 200 so that the movable pressure arm 200 presses the workpiece 5 through the pressure plate body 100, etc. The conveying device can transport the workpiece 5 to the welding station, etc.

[0085] To address the technical problems existing in the relevant embodiments, this application also provides a welding method, which can be applied to the welding system 20 described above. See [link to relevant documentation]. Figure 10 , Figure 10 This is a schematic flowchart of a welding method according to one or more embodiments, specifically including the following steps S101 to S103.

[0086] Step S101: Move the pressure arm to press the end face of the weldment through the pressure plate body.

[0087] The welding component 5 can be the aforementioned terminal cover plate 2. Of course, in other application scenarios, the welding component 5 can also be other components that need to be welded. For example, when the welding component 5 is the terminal cover plate 2, the terminal cover plate 2 can be installed in the hollow groove of the terminal body 3 first. Then, the battery cell 1 is transported to the welding station. At the welding station, the pressure plate body 100 is placed on the end face of the terminal cover plate 2, and a downward pressing force is applied to the moving pressure arm 200 so that the moving pressure arm 200 presses the end face of the welding component 5 through the pressure plate body 100, so that the terminal cover plate 2 and the terminal body 3 are tightly fitted together, which facilitates the subsequent welding of the terminal cover plate 2 and improves the stability of the welding.

[0088] Step S102: The welding device welds the weldment along the edge of the weldment.

[0089] The welding device 30 may include, but is not limited to, laser welding devices, gas welding devices, fusion welding devices, ultrasonic welding devices, etc. The edge of the welded part 5 can be understood as the edge of the end face of the welded part 5, or the side edge of the welded part 5 connected to the end face of the welded part 5. For example, taking the electrode cover plate 2 as an example, when the electrode cover plate 2 is installed in the hollow groove of the electrode body 3, the connection point between the outer edge of the electrode cover plate 2 and the inner edge of the groove opening of the electrode body 3 can be the edge position that needs to be welded by the welding device 30.

[0090] Step S103: During the welding process of the welding device, the moving pressure arm drives the pressure plate body to move relative to the welding part, so as to change the position of the edge of the welding part that is covered by the moving pressure arm and / or the pressure plate body.

[0091] The welding process of the welding device 30 to weld the weldment 5 can be understood as: the continuous welding of the weldment 5 by the welding device 30, or, without considering whether the welding is interrupted, the entire process from the start of welding by the welding device 30 to the completion of the final welding. During the welding process, the pressure plate body 100 and / or the movable pressure arm 200 may obstruct the position to be welded. In this case, the position of the edge of the weldment 5 obstructed by the pressure plate body 100 and / or the movable pressure arm 200 can be changed by moving the movable pressure arm 200 relative to the weldment 5. For example, the movable pressure arm 200 is connected to the side of the pressure plate body 100 away from the welded part 5 and extends in a direction away from the welded part 5. The area of ​​the pressure plate body 100 covering the end face of the welded part 5 is larger than the area of ​​the end face of the welded part 5. When the pressure plate body 100 covers the end face of the welded part 5, the pressure plate body 100 will block the position of the edge of the welded part 5, while the movable pressure arm 200 will not block the position of the edge of the welded part 5. The pressure plate body 100 can be moved relative to the welded part 5 by the movable pressure arm 200 to change the position of the edge of the welded part 5 blocked by the pressure plate body 100. For example, the movable pressure arm 200 can be extended along the side wall of the pressure plate body 100. The area of ​​the pressure plate body 100 used to cover the end face of the welded part 5 is smaller than the area of ​​the end face of the welded part 5. At this time, when the pressure plate body 100 covers the end face of the welded part 5, the pressure plate body 100 will not block the position of the edge of the welded part 5, while the movable pressure arm 200 will block the position of the edge of the welded part 5. The pressure plate body 100 can be moved relative to the welded part 5 by the movable pressure arm 200 to change the position of the edge of the welded part 5 blocked by the movable pressure arm 200. For example, the movable pressure arm 200 can be extended along the side wall of the pressure plate body 100. The area of ​​the pressure plate body 100 used to cover the end face of the welded part 5 is larger than the area of ​​the end face of the welded part 5. At this time, when the pressure plate body 100 covers the end face of the welded part 5, both the pressure plate body 100 and the movable pressure arm 200 will block the position of the edge of the welded part 5. The pressure plate body 100 can be moved relative to the welded part 5 by the movable pressure arm 200 to change the position of the edge of the welded part 5 blocked by the movable pressure arm 200 and the pressure plate body 100.

[0092] Through the above embodiments, the movable pressure arm 200 and the pressure plate body 100 press the welded part 5 so that the welded part 5 fits tightly with other components, which facilitates welding of the welded part 5 and improves the stability of welding. In addition, during the welding process, the position of the edge of the welded part 5 covered by the movable pressure arm 200 and / or the pressure plate body 100 can be changed by moving the movable pressure arm 200, which facilitates welding along the edge of the welded part 5 while pressing the welded part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0093] In some embodiments, the step of moving the pressure plate body 100 relative to the weldment 5 by the movable pressure arm 200 includes: moving the pressure plate body 100 to space from the end face of the weldment 5 by the movable pressure arm 200; and moving the pressure plate body 100 relative to the weldment 5 while the pressure plate body 100 is spaced from the end face of the weldment 5. For example, when it is necessary to move the pressure plate body 100 by the movable pressure arm 200, the movable pressure arm 200 can be raised by a predetermined distance by other means so that the movable pressure arm 200 moves the pressure plate body 100 to space from the end face of the weldment 5. The predetermined distance can be set according to the actual situation. For example, the predetermined distance can be less than 0.5 mm, etc., so as to minimize the entry of weld beads generated during welding into the end face of the weldment 5 due to a large predetermined distance during the movement. After the pressure plate body 100 is spaced from the end face of the welding part 5, the pressure plate body 100 can be moved relative to the welding part 5 by moving the pressure arm 200. This can alleviate the risk of damage to the welding part 5 and the welding pressure plate 10 due to friction with the welding part 5 during the movement, and improve welding efficiency and yield.

[0094] Furthermore, after the step of moving the pressure arm 200 to separate the pressure plate body 100 from the end face of the weldment 5, the welding method further includes: inputting a positive pressure airflow into the air outlet of the pressure plate body 100 through the air inlet 210 of at least one of the pressure plate body 100 and the moving pressure arm 200. The pressure plate body 100 may be provided with an air outlet 110, the opening of which is located on the end face of the pressure plate body 100 used to press the weldment 5. At least one of the pressure plate body 100 and the moving pressure arm 200 may be provided with an air inlet 210, which is connected to the air outlet 110. After the moving pressure arm 200 separates the pressure plate body 100 from the end face of the weldment 5, weld beads generated during welding by the welding device 30 may enter the end face of the weldment 5. At this time, by inputting a positive pressure airflow, the positive pressure airflow can hit the end face of the weldment 5 and diffuse outward along the end face of the weldment 5, thereby mitigating the risk of weld beads generated during welding entering the end face of the weldment 5. The input positive pressure airflow can include, but is not limited to, inert gases such as nitrogen, to facilitate effective weld formation and ensure a smooth and rounded weld. Thus, by outputting positive pressure airflow from the inlet 210 to the outlet 110, the welding plate 10 is moved, and the positive pressure airflow blows the weld beads generated during welding away from the end face of the weldment 5, mitigating the risk of weld beads splattering onto the end face of the weldment 5.

[0095] Combination Figure 11 and Figure 12 As shown, Figure 11 This is a schematic diagram of a welding plate pressing a weldment at a first position according to one or more embodiments. Figure 12This is a schematic diagram of a welding plate pressing a weldment at a second position according to one or more embodiments.

[0096] The pressure plate body 100 extends along a first direction X1. In a second direction X2 perpendicular to the first direction X1, the pressure plate body 100 covers the non-edge area of ​​the end face of the weldment 5. A movable pressure arm 200 extends along the second direction X2. The step of the movable pressure arm 200 moving the pressure plate body 100 relative to the weldment 5 includes: if it is detected that the welding device 30 is welding from a first point A1 to a second point A2 along the welding direction Y; wherein the first point A1 is closer to the movable pressure arm 200 in the welding direction Y than the second point A2; the movable pressure arm 200 then moves the pressure plate body 100 from a first position to a second position along the first direction X1; wherein the first position includes a position in the welding direction Y where the movable pressure arm 200 is located outside the first point A1 and the second point A2, and the second position includes a position in the welding direction Y where the movable pressure arm 200 covers the area between the first point A1 and the second point A2.

[0097] The welding direction Y can be understood as the direction of the welding trajectory formed by the welding device 30 during the welding process. For example, when the welding device 30 welds the edge of the workpiece 5 clockwise, the welding direction Y is clockwise; when the welding device 30 welds the edge of the workpiece 5 counterclockwise, the welding direction Y is counterclockwise. Figure 11 As shown, when the movable pressure arm 200 is in the first position, the welding device 30 can start welding from the first point A1 and proceed counterclockwise to the second point A2. The first point A1 can be a position close to the movable pressure arm 200, for example, the first point A1 can be a position with a predetermined distance from the movable pressure arm 200. For example, the predetermined distance can be a position greater than 2mm, which can alleviate the influence of the movable pressure arm 200 on the welding device 30 during welding. The second point A2 can be any position. For example, the second point A2 can be such that the path length between the first point A1 and the second point A2 along the welding direction Y is one-third, one-half, two-fifths, or three-fifths of the edge path length of the welded part 5, etc. Figure 12 As shown, when the welding device 30 detects that welding has reached the second point A2, a control signal is generated to control the movable pressure arm 200 to rotate from the first position to the second position. At the second position, the movable pressure arm 200 and the pressure plate body 100 can only block the edge of the welded part 5 between the first point A1 and the second point A2. Since the welding operation of the edge of the welded part 5 between the first point A1 and the second point A2 has been completed, the movement of the movable pressure arm 200 and the pressure plate body 100 to this position can alleviate the obstruction of the edges of other welded parts 5 that have not yet been welded.

[0098] In some embodiments, the extension length of the pressure plate body 100 in the first direction X1 is greater than the extension length of the end face of the weldment 5 in the first direction X1; at a first position, the pressure plate body 100 does not obstruct the edge between the first point A1 and the second point A2 of the weldment 5 in the first direction X1; at a second position, the pressure plate body 100 does not obstruct the edge between the first point A1 and the second point A2 of the weldment 5 in the opposite direction of the first direction X1. The pressure plate body 100 can obstruct the end face of the weldment 5, mitigating the risk of weld beads splattering onto the end face of the weldment 5 during welding. Furthermore, simply moving the pressure plate body 100 in the first direction X1 changes the position of the edge of the weldment 5 obstructed by the pressure plate body 100 and the movable pressure arm 200, thus alleviating the obstruction of the pressure plate body 100 from welding along the edge of the weldment 5 and improving welding efficiency.

[0099] In some embodiments, the step of welding the weldment 5 along the edge of the weldment 5 by the welding device 30 includes: the welding device 30 welding along the edge of the weldment 5 to form a closed welding trajectory; the welding device 30 welding along the closed trajectory to a third point A3 to form a finishing trajectory; wherein, the third point A3 is on the welding trajectory or outside the welding trajectory. A closed welding trajectory can be understood as: the welding device 30 starts welding from the starting point and welds along the welding direction Y along the edge of the weldment 5 until it welds back to the starting point, thus forming a circular closed welding trajectory. Figure 11 and Figure 12 For example, starting from point A1, welding proceeds along the welding direction Y, passing through point A2, and then back to point A1, forming a closed-loop welding trajectory. After forming this closed-loop trajectory, the welding device 30 can continue welding to point A3. Point A3 can be any position other than the end face of the welded part 5. For example, point A3 can be located along the welding direction Y between point A1 and point A2, or it can be located outside the edge of the welded part 5. For instance, when the welded part 5 is a pole cover plate 2, which is installed in the hollow groove of the pole body 3, point A3 can be located on the pole body 3. Thus, by continuing welding to point A3 after achieving a closed-loop welding trajectory, the entire welding trajectory becomes more complete, resulting in higher stability of the welded product.

[0100] In summary, by moving the pressure arm 200 and the pressure plate body 100 to press the welded part 5, the welded part 5 is made to fit tightly with other components, which facilitates welding of the welded part 5 and improves the stability of the welding. Furthermore, during the welding process, the position of the edge of the welded part 5 covered by the pressure arm 200 and / or the pressure plate body 100 can be changed by moving the pressure arm 200, which facilitates welding along the edge of the welded part 5 while pressing it, thereby improving the reliability of the welding and the convenience of the welding process.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A welding method, characterized in that, An application is made in a welding system, the welding system including a welding device and a welding pressure plate. The welding pressure plate includes a pressure plate body and a movable pressure arm. The pressure plate body is used to cover the end face of the weldment. The pressure plate body extends along a first direction. In a second direction perpendicular to the first direction, the pressure plate body is used to cover the non-edge area of ​​the end face of the weldment. The movable pressure arm extends along the second direction. The movable pressure arm is connected to the pressure plate body and is used to press the weldment through the pressure plate body. The movable pressure arm extends in a direction away from the pressure plate body and can drive the pressure plate body to move relative to the weldment in the first direction to change the position of the edge of the weldment covered by the movable pressure arm and / or the pressure plate body. The welding method includes: The movable pressure arm presses the end face of the welded part through the pressure plate body; The welding device welds the weldment along the edge of the weldment; During the welding process of the welding device, the moving pressure arm drives the pressure plate body to move relative to the welding workpiece, so as to change the position of the edge of the welding workpiece that is covered by the moving pressure arm and / or the pressure plate body; The step of moving the pressure arm to move the pressure plate body relative to the welded part includes: If it is detected that the welding device is welding from the first point to the second point along the welding direction; wherein the first point is closer to the moving pressure arm than the second point in the welding direction; The movable pressure arm drives the pressure plate body to move from a first position to a second position along the first direction; wherein, the first position includes: a position in the welding direction where the movable pressure arm is located outside the first point and the second point, and the second position includes: a position in the welding direction where the movable pressure arm covers the first point and the second point, the extension length of the pressure plate body in the first direction is greater than the extension length of the weldment end face in the first direction, at the first position, the pressure plate body does not cover the edge of the weldment between the first point and the second point in the first direction, and at the second position, the pressure plate body does not cover the edge of the weldment between the first point and the second point in the opposite direction of the first direction; The welding device welds along the edge of the workpiece to form a closed welding trajectory.

2. The welding method according to claim 1, characterized in that, The step of moving the pressure plate body relative to the welded part by the moving pressure arm includes: The moving pressure arm causes the pressure plate body to be spaced apart from the end face of the welded part; With the pressure plate body and the end face of the welded part spaced apart, the moving pressure arm drives the pressure plate body to move relative to the welded part.

3. The welding method according to claim 2, characterized in that, After the step of moving the pressure arm to distance the pressure plate body from the end face of the weldment, the welding method further includes: Positive pressure airflow is input to the outlet of the pressure plate body through the air inlet of at least one of the pressure plate body and the movable pressure arm.

4. The welding method according to claim 1, characterized in that, After the step of the welding device welding along the edge of the workpiece to form a closed welding trajectory, the welding method includes: The welding device welds along the beginning and end of the closed path to the third point to form a finishing trajectory; wherein the third point is either on the welding trajectory or outside the welding trajectory.

5. The welding method according to claim 1, characterized in that, The movable pressure arm is centered at both ends relative to the pressure plate body in the first direction.

6. The welding method according to claim 1, characterized in that, The pressure plate body is provided with an air outlet, the opening of which is located on the end face of the pressure plate body used to press the welded part. At least one of the pressure plate body and the movable pressure arm is provided with an air inlet, which is connected to the air outlet.

7. The welding method according to claim 6, characterized in that, The pressure plate body is provided with a buffer air chamber, and the air outlet is connected to the air inlet through the buffer air chamber.

8. The welding method according to claim 7, characterized in that, The welding pressure plate includes a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are closed to form the pressure plate body; The first cover plate has a first buffer air groove, and the second cover plate is placed over the opening of the first buffer air groove to form the buffer air cavity; And / or, the second cover plate has a second buffer air groove, and the first cover plate covers the opening of the second buffer air groove to form the buffer air cavity.

9. The welding method according to claim 7, characterized in that, The number of air outlets is multiple, and each of the multiple air outlets is connected to the buffer air chamber.

10. The welding method according to claim 7, characterized in that, The air inlet is located on the movable pressure arm, and the movable pressure arm is provided with an air passage connecting the air inlet and the buffer air chamber.

11. The welding method according to claim 10, characterized in that, The welding pressure plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate being closed to form the movable pressure arm; The first cover plate has a first vent groove, and the second cover plate is placed over the opening of the first vent groove to form the venting channel; And / or, the second cover plate has a second vent groove, and the first cover plate covers the opening of the second vent groove to form the venting channel.

12. The welding method according to claim 10, characterized in that, The welding pressure plate includes a first cover plate and a second cover plate. The first cover plate includes a first main body portion and a second main body portion connected to each other. The second cover plate includes a third main body portion and a fourth main body portion connected to each other. The first main body portion covers the third main body portion to form the pressure plate body, and the second main body portion covers the fourth main body portion to form the movable pressure arm.

13. The welding method according to claim 12, characterized in that, The first main body has a first buffer air groove, the second main body has a first venting groove communicating with the first buffer air groove, the third main body covers the opening of the first buffer air groove to form a buffer air cavity, and the fourth main body covers the opening of the first venting groove to form the venting channel. And / or, the third main body has a second buffer air groove, the fourth main body has a second venting groove communicating with the second buffer air groove, the third main body covers the opening of the second buffer air groove to form a buffer air cavity, and the second main body covers the opening of the second venting groove to form the venting channel.

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