Welding pressing plate, welding system and welding method

Abstract

The invention discloses a welding pressing plate, a welding system and a welding method. The welding pressing plate comprises a pressing plate body and a movable pressing arm. The pressing plate body is used for covering the end face of a welding part. The movable pressing arm is connected with the pressing plate body and used for pressing the welding part through the pressing plate body, and the movable pressing arm extends in the direction away from the pressing plate body and can drive the pressing plate body to move relative to the welding part so as to change the position of the edge, shielded by the movable pressing arm and / or the pressing plate body, of the welding part. Therefore, the welding part can be pressed through the movable pressing arm and the pressing plate body, welding of the welding part is facilitated, the welding stability is improved, the pressing plate body can be driven by the movable pressing arm to move relative to the welding part, and the position of the edge, shielded by the movable pressing arm and / or the pressing plate body, of the welding part is changed. And welding can be carried out along the edge of the welding part while the welding part is pressed, so that the welding reliability and the convenience of the welding process are improved.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a welding platen, a welding system and a welding method. Background Art

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

[0003] When two parts need to be welded, the parts need to be pressed to fit the two parts, and then the parts need to be welded to fix the two parts together. However, how to smoothly weld the parts while pressing becomes a technical problem that needs to be solved urgently. Summary of the invention

[0004] The main purpose of this application is to provide a welding plate, a welding system and a welding method, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] In order to solve the technical problems existing in the prior art, the present application provides a welding platen, which includes a platen body and a movable pressure arm, wherein the platen body is used to cover the end face of the weldment; the movable pressure arm is connected to the platen body, and the movable pressure arm is used to press the weldment through the platen body, and the movable pressure arm extends in a direction away from the platen body, and can drive the platen body to move relative to the weldment to change the position of the edge of the weldment blocked by the movable pressure arm and / or the platen body. Thus, the platen body is used to cover the end face of the weldment, and the movable pressure arm is connected to the platen body, and the weldment can be pressed by the movable pressure arm and the platen body, so that the weldment and other components are closely fitted, which is convenient for welding the weldment and improving the stability of welding, and the platen body can also be driven by the movable pressure arm to move relative to the weldment to change the position of the edge of the weldment blocked by the movable pressure arm and / or the platen body, which is convenient for welding along the edge of the weldment while pressing the weldment, thereby improving the reliability of welding and the convenience of the welding process.

[0006] In some embodiments, the platen body is extended along a first direction, and in a second direction perpendicular to the first direction, the platen body is used to cover the non-edge area of ​​the end face of the weldment, and the movable pressure arm is extended along the second direction. Thus, the platen body extends along the first direction, and the end face of the weldment can be shielded by the platen body, thereby alleviating the risk of welding beads splashing to the end face of the weldment during welding, and the movable pressure arm extends along the second direction, and the platen body only covers the non-edge area of ​​the end face of the weldment in the second direction, and the position of the edge of the weldment shielded by the platen body and the movable pressure arm can be changed by moving the platen body in the first direction, thereby alleviating the platen body from interfering with the operation of welding along the edge of the weldment, thereby improving the welding efficiency.

[0007] In some embodiments, the movable pressing arm is centrally arranged relative to both ends of the pressing plate body in the first direction. Thus, by centrally arranging the movable pressing arm, the pressing effect of pressing the weldment can be improved, and it is also convenient to change the position of the edge of the weldment blocked by the movable pressing arm during the movement along the first direction, thereby alleviating the operation of the movable pressing arm obstructing the welding along the edge of the weldment and improving the welding efficiency.

[0008] In some embodiments, the platen body is provided with an air outlet, the opening of the air outlet is located at the end face of the platen body for pressing the weldment, and at least one of the platen body and the movable pressing arm is provided with an air inlet, which is connected to the air outlet. Thus, the platen body is provided with both an air inlet and an air outlet, and the opening of the air outlet is located at the end face of the platen body for pressing the weldment, and gas can be output to the air outlet through the air inlet, so that in the process of moving the welding platen, the weld beads generated during welding can be blown away in a direction away from the end face of the weldment through the airflow generated by the gas, thereby alleviating 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 cavity, and the air outlet is connected to the air inlet through the buffer air cavity. Thus, the design of the buffer air cavity can simplify the communication mode between the air outlet and the air inlet, and the airflow input from the air inlet can be divided into airflow outputs in multiple directions through the buffer air cavity, further alleviating the risk of welding beads splashing onto the end surface of the welded part during welding.

[0010] In some embodiments, the welding platen includes a first cover plate and a second cover plate, the first cover plate and the second cover plate are covered to form a platen body; the first cover plate has a first buffer gas groove, the second cover plate is covered at the notch of the first buffer gas groove to form a buffer gas cavity; and / or the second cover plate has a second buffer gas groove, the first cover plate is covered at the notch of the second buffer gas groove to form a buffer gas cavity. Thus, by covering the second cover plate at the notch of the first buffer gas groove of the first cover plate, and / or covering the first cover plate at the notch of the second buffer gas groove of the second cover plate to form a buffer gas cavity, the difficulty of forming the buffer gas cavity and the gas outlet hole can be reduced, and the production cost can be reduced.

[0011] In some embodiments, there are multiple air outlets, and the multiple air outlets are connected to the buffer air cavity respectively. Therefore, by providing multiple air outlets, and the multiple air outlets are connected to the buffer air cavity respectively, the airflow input from the air inlet can be divided into multiple directions of airflow output through the buffer air cavity, further reducing the risk of welding beads splashing onto the end surface of the weld during welding.

[0012] In some embodiments, the air inlet is provided on the movable pressure arm, and the movable pressure arm is provided with an air passage connecting the air inlet and the buffer air cavity. Thus, the air outlet and the air inlet are connected through the air passage and the buffer air cavity, which facilitates the air flow to be guided to the buffer air cavity through the air passage and flows out through the air outlet, and can simplify the communication mode between the air outlet and the air inlet. Moreover, the air inlet is located on the movable pressure arm, and the risk of interference with welding can be alleviated when air is taken in 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 are covered to form a movable pressure arm; the first cover plate has a first ventilation groove, the second cover plate is covered on the notch of the first ventilation groove to form an air passage; and / or the second cover plate has a second ventilation groove, the first cover plate is covered on the notch of the second ventilation groove to form an air passage. Thus, by covering the second cover plate on the notch of the first ventilation groove of the first cover plate, and / or covering the first cover plate on the notch of the second buffer air groove of the second cover plate to form an air passage, the difficulty of forming the air passage and the air inlet can be reduced, and the production cost 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, 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 is covered on the third main body portion to form a pressure plate body, and the second main body portion is covered on the fourth main body portion to form a movable pressure arm. Thus, the pressure plate body and the movable pressure arm are formed by covering the first cover plate and the second cover plate, which can simplify the molding difficulty of the pressure plate body and the movable pressure arm, further reduce the molding difficulty of the air duct and the air inlet, and reduce the production cost.

[0015] In some embodiments, the first main body has a first buffer air groove, the second main body has a first ventilation groove connected to the first buffer air groove, the third main body covers the notch of the first buffer air groove to form a buffer air cavity, and the fourth main body covers the notch of the first ventilation groove to form an air duct; and / or, the third main body has a second buffer air groove, the fourth main body has a second ventilation groove connected to the second buffer air groove, the third main body covers the notch of the second buffer air groove to form a buffer air cavity, and the second main body covers the notch of the second ventilation groove to form an air duct. Thus, by simultaneously forming the first buffer air groove and the first ventilation groove that are interconnected on the first cover plate, and / or simultaneously forming the second buffer air groove and the second ventilation groove that are interconnected on the second cover plate, the difficulty of forming the air duct, the air inlet, the air outlet, and the buffer air cavity can be reduced, and the production cost can be reduced.

[0016] In order to solve the technical problems existing in the prior art, the present application also provides a welding system, which includes a welding device and the above-mentioned welding pressure plate, the welding pressure plate is used to press the weldment, and the welding device is used to weld the weldment along the edge of the weldment.

[0017] In order to solve the technical problems existing in the prior art, the present application also provides a welding method, which is applied to the above-mentioned welding system, and the welding method includes: a moving pressure arm presses the end face of the weldment through the pressure plate body; a welding device welds the weldment along the edge of the weldment; during the process of the welding device welding the weldment, the moving pressure arm drives the pressure plate body to move relative to the weldment to change the position of the edge of the weldment blocked by the moving pressure arm and / or the pressure plate body. Thus, by pressing the weldment with the moving pressure arm and the pressure plate body, the weldment is closely fitted with other components, which facilitates welding of the weldment and improves the stability of welding. In addition, during the welding process, the position of the edge of the weldment blocked by the moving pressure arm and / or the pressure plate body can be changed by moving the moving pressure arm, which facilitates welding along the edge of the weldment while pressing the weldment, thereby improving the reliability of welding and the convenience of the welding process.

[0018] In some embodiments, the step of moving the pressure arm to drive the pressure plate body to move relative to the weldment includes: moving the pressure arm to drive the pressure plate body to be spaced apart from the end face of the weldment; and moving the pressure arm to drive the pressure plate body to move relative to the weldment when the pressure plate body and the end face of the weldment are spaced apart. Thus, when the pressure plate body and the end face of the weldment are spaced apart, the risk of damaging the weldment and the welding pressure plate due to friction with the weldment during movement can be alleviated, thereby improving welding efficiency and yield rate.

[0019] In some embodiments, after the step of moving the pressure arm to drive the pressure plate body to be spaced apart from the end face of the weldment, the welding method further comprises: inputting a positive pressure airflow to 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, the positive pressure airflow is output to the air outlet through the air inlet, so that in the process of moving the welding pressure plate, the welding beads generated during welding are blown away in a direction away from the end face of the weldment through the positive pressure airflow, thereby alleviating the risk of welding beads splashing onto the end face of the weldment during welding.

[0020] In some embodiments, the pressing plate body is extended along a first direction, and in a second direction perpendicular to the first direction, the pressing plate body is used to cover the non-edge area of ​​the end surface of the welding part, and the movable pressing arm is extended along the second direction; the step of the movable pressing arm driving the pressing plate body to move relative to the welding part includes: if it is detected that the welding device is welded from a first point to a second point along the welding direction; wherein the first point is closer to the movable pressing arm than the second point in the welding direction; the movable pressing arm drives the pressing plate body to move from the first position to the second position along the first direction; wherein the first position includes: a position where the movable pressing arm is between the first point and the second point in the welding direction, and the second position includes: a position where the movable pressing arm blocks the first point and the second point in the welding direction. Thus, after the welding device is welded from the first point to the second point, the movable pressing arm rotates from the first position to the second position again, so as to change the position blocked by the movable pressing arm and the pressing plate body from the first position that has not been welded to the second position that has been welded, so as to continuously press the welding part through the pressing plate without affecting the welding, so as to improve the 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 block the edge of the weldment between the first point and the second point in the first direction; at the second position, the pressure plate body does not block the edge of the weldment between the first point and the second point in the opposite direction of the first direction. Thus, the end face of the weldment can be shielded by the pressure plate body, reducing the risk of welding beads splashing onto the end face of the weldment during welding. At the same time, the position of the edge of the weldment shielded by the pressure plate body and the movable pressure arm can be changed by simply moving the pressure plate body in the first direction, reducing the pressure plate body from interfering with the operation of welding along the edge of the weldment, thereby improving the welding efficiency.

[0022] In some embodiments, the step of welding the welded part along the edge of the welded part by the welding device includes: the welding device welds along the edge of the welded part to form a welded track with a closed end; the welding device welds along the closed end to a third point to form a closing track; wherein the third point is on the welded track or outside the welded track. Thus, after the welded track with a closed end is achieved, welding will continue to the third point, so that the entire welded track is more complete and the welding stability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0025] Figure 2 is a schematic diagram of a structure in which a welding pressing plate is pressed on a pole cover plate according to one or more embodiments;

[0026] Figure 3 is a schematic diagram of a structure in which a welding pressing plate is pressed on a welding part according to one or more embodiments;

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

[0028] Figure 5 yes Figure 4 A schematic cross-sectional view of the welding plate along the AA direction shown in FIG.

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

[0030] Figure 7 yes Figure 6 The structural schematic diagram of the welding pressing plate shown in the figure with part of the second cover plate cut off;

[0031] Figure 8 yes Figure 6 The structural schematic diagram of the welding pressing plate shown in the figure with part of the first cover plate cut off;

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

[0033] Fig.10 is a schematic flow chart of a welding method according to one or more embodiments;

[0034] Fig.11 is a structural schematic diagram of a welding pressing plate pressing a welding piece at a first position according to one or more embodiments;

[0035] Fig.12 It is a schematic structural diagram of a welding pressing plate pressing a welding part at a second position according to one or more embodiments.

[0036] Reference numerals: battery cell 1; pole cover 2; pole body 3; housing 4; welding part 5;

[0037] Welding plate 10; plate body 100; air outlet 110; buffer air cavity 120; movable press 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 ventilation groove 321; second cover plate 400; third main body 410; second buffer air groove 411; fourth main body 420; second ventilation groove 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 DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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).

[0045] 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.

[0046] 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.

[0047] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. 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 battery application areas, its market demand is also constantly expanding.

[0048] The battery can be used in an electrical device, so that the electrical device can realize the corresponding function through the electric energy provided by the battery. For example, the electrical device may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecrafts, etc.

[0049] The electrical device may be a vehicle, and the vehicle includes a battery. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery is provided inside the vehicle, and the battery may be provided at the bottom, head or tail of the vehicle. The battery can be used to power the vehicle, for example, the battery can be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller is used to control the battery to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0050] The shape of the battery may include but is not limited to a square, cylindrical or other arbitrary shapes.

[0051] In some embodiments, the battery may include a housing and a plurality of battery cells, and the battery cells are contained in the housing. The housing is used to provide a storage space for the battery cells, and the plurality of battery cells may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the plurality of battery cells are both connected in series and in parallel. The plurality of battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells is contained in the housing; of course, the battery may also be a battery module formed by first connecting a plurality of battery cells in series, in parallel, or in a mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then contained in the housing.

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

[0053] The battery cell 1 refers to the smallest unit that constitutes the battery, and the battery cell 1 may include a shell 4, an electrode assembly, and other functional components. The shell 4 may form an internal environment for accommodating the electrode assembly, and the electrode assembly is located in the internal environment of the shell 4. The electrode assembly is a component in the battery cell 1 where an electrochemical reaction occurs, and one or more electrode assemblies may be contained in the shell. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear connects the electrode column to form a current loop.

[0054] In order to improve the product performance of the battery cell 1, the present application provides a new battery cell 1, which includes an electrode column, and the electrode column is hollow. Specifically, the electrode column may include a pole column body 3 and a pole column cover plate 2, and the pole column body 3 is annular and protrudes from the end wall of the shell 4. The portion of the shell 4 surrounding the pole column body 3 may be recessed inward to form a hollow groove, and the bottom wall of the hollow groove has an opening for the pole ear of the electrode assembly to pass through the hollow groove, and the portion of the pole ear of the electrode assembly located in the hollow groove is in contact with and conductive with the pole column body 3. The pole cover 2 can be covered on the notch 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 2 is overlapped on the annular boss so that the pole cover 2 covers the notch of the hollow groove. Furthermore, the surface of the pole cover 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 between the outer edge of the pole cover 2 and the inner edge of the pole body 3, so that the pole cover 2 and the pole body 3 are fixedly connected.

[0055] See also Figure 2 , Figure 2 It is a schematic diagram of the structure in which a welding pressure plate is pressed on a pole cover according to one or more embodiments.

[0056] When the pole cover 2 and the pole body 3 need to be welded, the welding pressing plate 10 can be pressed against the pole cover 2 to make the pole cover 2 and the pole body 3 fit together, and then the pole cover 2 and the pole body 3 are welded to fix the pole cover 2 and the pole body 3 together.

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

[0058] Specifically, the welding process can be one-time. For example, during the welding process, the position of the pole cover plate 2 shielded by the welding assembly can be changed to complete the welding operation of the pole cover plate 2 and the pole body 3 without interrupting the welding operation. There can be two electrode columns on the battery cell 1, and the pole cover plates 2 and the pole body 3 of the two electrode columns can be fixed by welding. In the actual operation process, the pole cover plate 2 of one electrode column can be pressed by a welding plate 10 first, and after the welding operation of the pole cover plate 2 and the pole body 3 of one electrode column is completed, the welding operation of the pole cover plate 2 and the pole body 3 of the other electrode column can be welded. Alternatively, the pole cover plates 2 of the two electrode columns can be pressed simultaneously by two welding platens 10, and then the pole cover plates 2 and the pole body 3 of the two electrode columns are welded at the same time.

[0059] In order to relieve the welding pressure plate 10 from blocking the position to be welded while pressing the welded part 5, the present application provides a welding pressure plate, see Figure 3 , Figure 3 It is a schematic diagram of the structure in which a welding pressure plate is pressed on a welding part according to one or more embodiments.

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

[0061] The movable pressing arm 200 is connected to the pressing plate body 100. The movable pressing arm 200 is used to press the weldment 5 through the pressing plate body 100. The movable pressing arm 200 extends in a direction away from the pressing plate body 100, and can drive the pressing plate body 100 to move relative to the weldment 5, so as to change the position of the edge of the weldment 5 blocked by the movable pressing arm 200 and / or the pressing plate body 100. The movable pressing arm 200 drives the pressing plate body 100 to move relative to the weldment 5, which can be understood as the movable pressing arm 200 translating relative to the end surface of the weldment 5. External force can be applied to the movable pressing arm 200 by other tooling equipment or manually, so that the movable pressing arm 200 drives the pressing plate body 100 to move relative to the weldment 5.

[0062] The movable pressure arm 200 can be fixedly connected or detachably connected to the platen body 100. For example, the movable pressure arm 200 can be integrated with the platen body 100 so that the movable pressure arm 200 is fixedly connected to the platen body 100, which is convenient for the movable pressure arm 200 to drive the platen body 100 to move together. Alternatively, the movable pressure arm 200 can be sleeved on the platen body 100 so that the movable pressure arm 200 is detachably connected to the platen body 100. Alternatively, the movable pressure arm 200 can also be detachably connected or fixedly connected to the platen body 100 through other components. The movable pressure arm 200 extends in a direction away from the platen body 100. For example, the movable pressure arm 200 can be extended in the direction of the side wall of the platen body 100, which is convenient for applying downward pressure to the movable pressure arm 200 so that the movable pressure arm 200 presses the weldment 5 through the platen body 100. For another example, the movable pressing arm 200 is connected to a side of the pressing plate body 100 facing away from the welding piece 5 , and is extended in a direction away from the welding piece 5 .

[0063] During the welding process, the platen body 100 and / or the movable pressure arm 200 may block the position to be welded. At this time, the platen body 100 can be driven to move relative to the weldment 5 by the movable pressure arm 200 to change the position of the edge of the weldment 5 blocked by the movable pressure arm 200 and / or the platen body 100. Exemplarily, the movable pressure arm 200 is connected to the side of the platen body 100 away from the weldment 5 and is extended in a direction away from the weldment 5. The area of ​​the end face of the platen body 100 used to cover the weldment 5 is larger than the area of ​​the end face of the weldment 5. At this time, when the platen body 100 covers the end face of the weldment 5, the platen body 100 will block the position of the edge of the weldment 5, while the movable pressure arm 200 will not block the position of the edge of the weldment 5. The platen body 100 can be driven to move relative to the weldment 5 by the movable pressure arm 200 to change the position of the edge of the weldment 5 blocked by the platen body 100. Exemplarily, the movable pressure arm 200 can be extended along the direction of the side wall of the pressure plate body 100. The area of ​​the end face of the pressure plate body 100 used to cover the welding part 5 is smaller than the area of ​​the end face of the welding part 5. At this time, when the pressure plate body 100 covers the end face of the welding part 5, the pressure plate body 100 will not block the position of the edge of the welding part 5, while the movable pressure arm 200 will block the position of the edge of the welding part 5. The movable pressure arm 200 can be used to drive the pressure plate body 100 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200. Exemplarily, the movable pressure arm 200 can be extended along the direction of the side wall of the pressure plate body 100, and the area of ​​the end face of the pressure plate body 100 used to cover the welding part 5 is larger than the area of ​​the end face of the welding part 5. At this time, when the pressure plate body 100 covers the end face of the welding part 5, the pressure plate body 100 and the movable pressure arm 200 will both block the position of the edge of the welding part 5. The movable pressure arm 200 can be used to drive the pressure plate body 100 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200 and the pressure plate body 100.

[0064] Through the above-mentioned embodiment, the pressure plate body 100 is used to cover the end face of the welding part 5, and the movable pressure arm 200 is connected to the pressure plate body 100. The welding part 5 can be pressed by the movable pressure arm 200 and the pressure plate body 100 to make the welding part 5 fit tightly with other components, which is convenient for welding the welding part 5 and improves the stability of welding. The pressure plate body 100 can also be driven by the movable pressure arm 200 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200 and / or the pressure plate body 100, so as to facilitate welding along the edge of the welding part 5 while pressing the welding part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0065] Further, the platen body 100 is extended along the first direction X1. In the second direction X2 perpendicular to the first direction X1, the platen body 100 is used to cover the non-edge area of ​​the end face of the welding member 5, and the movable pressing arm 200 is extended along the second direction X2. The platen body 100 is extended along the first direction X1, that is, the size in the first direction X1 is larger than the size in the second direction X2. For example, the platen body 100 used to cover the end face of the welding member 5 can be rectangular, runway-shaped, etc. The end face of the welding member 5 can also be extended in the first direction X1, and the shape of the end face of the platen body 100 can be similar to the shape of the end face of the welding member 5 pressed by the platen body 100, for example, the end faces of both are rectangular or runway-shaped, etc. In the second direction X2, the size of the end face of the welding member 5 can be slightly larger than the size of the end face of the platen body 100, so that when the platen body 100 covers the end face of the welding member 5, it can cover the non-edge area of ​​the end face of the welding member 5. The movable pressure arm 200 is extended 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 is pressed on the end face of the welding part 5, the portion of the edge of the welding part 5 that is blocked includes: the portion of the edge blocked by the pressure plate body 100 in the first direction X1 and the portion of the edge blocked by the movable pressure arm 200 in the second direction X2. At this time, it is only necessary to drive the pressure plate body 100 to move in the first direction X1 by the movable pressure arm 200 to change the edge position 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, and can cover the end face of the welding part 5 by the pressure plate body 100, thereby reducing the risk of welding beads splashing to the end face of the welding part 5 during welding, and 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 welding part 5 in the second direction X2. It is only necessary to move the pressure plate body 100 in the first direction X1 to change the position of the edge of the welding part 5 covered by the pressure plate body 100 and the movable pressure arm 200, thereby reducing the pressure plate body 100 from interfering with the welding operation along the edge of the welding part 5 and improving the welding efficiency.

[0066] Furthermore, the movable pressing arm 200 is centrally arranged relative to both ends of the pressing plate body 100 in the first direction X1. The width of the movable pressing arm 200 in the first direction X1 is small, and the connection between the movable pressing arm 200 and the pressing plate body 100 is located in the middle position of the pressing plate body 100 in the first direction X1. Therefore, by centrally arranging the movable pressing arm 200, the pressing effect of pressing the welding piece 5 can be improved, and it is also convenient to change the position of the edge of the welding piece 5 blocked by the movable pressing arm 200 during the movement along the first direction X1, so as to alleviate the operation of the movable pressing arm 200 hindering the welding along the edge of the welding piece 5, and improve the welding efficiency.

[0067] Combination Figure 4 and Figure 5 , Figure 4is a first structural schematic diagram of a welding plate according to one or more embodiments. Figure 5 yes Figure 4 The schematic cross-sectional view of the welding plate shown in FIG. 1 is along the AA direction.

[0068] The platen body 100 is provided with an air outlet 110, the opening of the air outlet 110 is located at the end surface of the platen body 100 for pressing the weldment 5, and at least one of the platen body 100 and the movable pressing arm 200 is provided with an air inlet 210, and the air inlet 210 is connected to the air outlet 110. The opening position of the air inlet 210 can be on the platen body 100 and / or on the movable pressing arm 200. For example, the number of the air inlet 210 is one, and the opening of the air inlet 210 can be located on the platen body 100 or the movable pressing arm 200. When the number of the air inlet 210 is multiple, the openings of the multiple air inlet holes 210 can be distributed on the platen body 100 and the movable pressing arm 200 at the same time. In order to facilitate processing and manufacturing, and to input airflow through the air inlet 210, the opening of the air inlet 210 can be located on the side of the pressing plate body 100 away from the end face of the pressed welded part 5, and / or on the side of the moving pressing arm 200 away from the end face of the pressed welded part 5. The air inlet 210 is connected to the air outlet 110, so that the airflow enters from the air inlet 210 and is discharged from the air outlet 110. For example, a positive pressure airflow can be input into the air inlet 210, and the positive pressure airflow flows in through the air outlet 110. Therefore, the pressing 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 at the end face of the pressing plate body 100 for pressing the welded part 5. The gas can be output to the air outlet 110 through the air inlet 210, so that in the process of moving the welding pressing plate 10, the weld beads generated during welding are blown away in the direction away from the end face of the welded part 5 by the airflow generated by the gas, so as to alleviate the risk of weld beads splashing to the end face of the welded part 5 during welding.

[0069] Further, the platen 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 platen body 100 may be 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 platen body 100 used to press the end face of the welding piece 5, and is directly connected to the buffer air cavity 120, and the opening of the air inlet is located on the side of the platen body 100 away from the end face of the welding piece 5 pressed, 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 then the air inlet 210 and the air outlet 110 can be connected through the buffer air cavity 120. Therefore, through the design of the buffer air cavity 120, the connection method between the outlet hole 110 and the inlet hole 210 can be simplified, and the airflow input from the inlet hole 210 can also be divided into airflow outputs in multiple directions through the buffer air cavity 120, further alleviating the risk of welding beads splashing onto the end face of the weldment 5 during welding.

[0070] Furthermore, there are multiple air outlet holes 110, and the multiple air outlet holes 110 are respectively connected to the buffer air cavity 120. The number and arrangement of the air outlet holes 110 can be set according to actual conditions, for example, the number of the air outlet holes 110 is 12, 14, 16, 18, etc., and the multiple air outlet holes 110 can be divided into two rows, the two rows of air outlet holes 110 are arranged at intervals, and the multiple air outlet holes 110 in each row are arranged at equal intervals, etc. Multiple air outlet holes 110 are all connected to the buffer air cavity 120. When positive pressure airflow is input from the air inlet hole 210, the airflow can first pass through the buffer air cavity 120, and then be diverted and discharged through the buffer air cavity 120 and the air outlet holes 110. Therefore, by setting multiple air outlet holes 110, and the multiple air outlet holes 110 are respectively connected to the buffer air cavity 120, the airflow input from the air inlet hole 210 can be conveniently divided into airflow outputs in multiple directions through the buffer air cavity 120, thereby further alleviating the risk of welding beads splashing onto the end face of the weldment 5 during welding.

[0071] In some embodiments, the air inlet 210 is provided on the movable pressing arm 200, and the movable pressing arm 200 is provided with an air passage 220 connecting the air inlet 210 and the buffer air cavity 120. The opening of the air inlet 210 may be located on the side of the movable pressing arm 200 away from the end surface of the pressed weldment 5. The movable pressing arm 200 may be an internal hollow structure, and the hollow cavity is used to form the air passage 220, one end of the air passage 220 is connected to the air inlet 210, and the other end is connected to the buffer air cavity 120, and the air flow may flow through the air inlet 210, the air passage 220, the buffer air cavity 120 and the air outlet 110 in sequence. Therefore, the air outlet 110 and the air inlet 210 are connected to each other through the air duct 220 and the buffer air cavity 120, which facilitates guiding the airflow to the buffer air cavity 120 through the air duct 220 and flowing out through the air outlet 110, and can simplify the connection between the air outlet 110 and the air inlet 210. The air inlet 210 is located at the movable pressing arm 200, and the risk of interference with welding can be alleviated when air is taken in through the air inlet 210.

[0072] See also Figures 6 to 8 , Figure 6 is a second structural schematic diagram of a welding plate according to one or more embodiments, Figure 7 yes Figure 6 The structural schematic diagram of the welding pressure plate shown in the figure with part of the second cover plate cut off, Figure 8 yes Figure 6 The structure schematic diagram of the welding pressure plate shown is a schematic diagram of the structure of a part of the first cover plate cut off.

[0073] The welding platen 10 includes a first cover plate 300 and a second cover plate 400 , and the platen body 100 and / or the movable press arm 200 can be formed by covering the first cover plate 300 and the second cover plate 400 .

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

[0075] The first cover plate 300 has a first buffer gas groove 311, and the second cover plate 400 is covered at the notch of the first buffer gas groove 311 to form the buffer gas cavity 120; and / or, the second cover plate 400 has a second buffer gas groove 411, and the first cover plate 300 is covered at the notch of the second buffer gas groove 411 to form the buffer gas cavity 120. The first cover plate 300 may be recessed inward to form the first buffer gas groove 311, and the second cover plate 400 may be recessed inward to form the second buffer gas groove 411. In one embodiment, the first buffer gas groove 311 may be provided only on the first cover plate 300, and 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 is covered at the notch of the first buffer gas groove 311 to seal the notch of the first buffer gas groove 311 to form the buffer gas cavity 120. In another embodiment, the second buffer gas groove 411 may 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 platen body 100, the first cover plate 300 covers the notch of the second buffer gas groove 411 and seals the notch of the second buffer gas groove 411 to form the buffer gas cavity 120. In yet another embodiment, the first buffer gas groove 311 may be formed on the first cover plate 300, and the second buffer gas groove 411 may 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 platen body 100, the first cover plate 300 covers the notch of the second buffer gas groove 411 and seals the notch of the second buffer gas groove 411. The second cover plate 400 covers the notch of the first buffer gas groove 311 and seals the notch of the second buffer gas groove 411 to form the buffer gas cavity 120 through the first buffer gas groove 311 and the second buffer gas groove 411. Therefore, by covering the second cover plate 400 on the notch of the first cache air groove 311 of the first cover plate 300, and / or covering the first cover plate 300 on the notch of the second cache air groove 411 of the second cover plate 400 to form a cache air cavity 120, the difficulty of forming the cache air cavity 120 and the air outlet hole 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 overlapped to form the movable pressing arm 200. In this embodiment, the first cover plate 300 and the second cover plate 400 are overlapped to form the movable pressing arm 200, and the pressing plate body 100 can be an integral structure. For example, the pressing plate body 100 can be an integral structure. After the first cover plate 300 and the second cover plate 400 are overlapped to form the movable pressing arm 200, the first cover plate 300 and the second cover plate 400 are respectively fixedly connected to the pressing plate body 100. Alternatively, the pressing plate body 100 is also formed by overlapping two cover plates. For example, the first cover plate 300 and the second cover plate 400 simultaneously form the movable pressing arm 200 and the pressing plate body 100 when overlapping.

[0077] The first cover plate 300 has a first vent groove 321, and the second cover plate 400 is covered on the notch of the first vent groove 321 to form the vent 220; and / or, the second cover plate 400 has a second vent groove 421, and the first cover plate 300 is covered on the notch of the second vent groove 421 to form the 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, and when the first cover plate 300 and the second cover plate 400 are covered to form the movable pressing arm 200, the second cover plate 400 is covered on the notch of the first vent groove 321 to seal the notch of the first vent groove 321 to form the vent 220. In another embodiment, the second vent groove 421 may be provided only on the second cover plate 400, and when the first cover plate 300 and the second cover plate 400 are covered to form the movable pressing arm 200, the first cover plate 300 is covered on the notch of the second vent groove 421, and the notch of the second vent groove 421 is sealed to form the vent 220. In yet another embodiment, the first vent groove 321 may be formed on the first cover plate 300, and the second vent groove 421 may be formed on the second cover plate 400, and when the first cover plate 300 and the second cover plate 400 are covered to form the movable pressing arm 200, the first cover plate 300 is covered on the notch of the second vent groove 421, and the notch of the second vent groove 421 is sealed, and the second cover plate 400 is covered on the notch of the first vent groove 321, and the notch of the second vent groove 421 is sealed, so that the vent 220 is formed together by the first vent groove 321 and the second vent groove 421. Therefore, by covering the second cover plate 400 on the notch of the first ventilation groove 321 of the first cover plate 300, and / or covering the first cover plate 300 on the notch of the second cache air groove 411 of the second cover plate 400 to form the air duct 220, the difficulty of forming the air duct 220 and the air inlet 210 can be reduced, and the production cost can be reduced.

[0078] In some embodiments, the welding platen 10 includes a first cover plate 300 and a second cover plate 400, the first cover plate 300 includes a first main body 310 and a second main body 320 connected to each other, the second cover plate 400 includes a third main body 410 and a fourth main body 420 connected to each other, the first main body 310 is covered on the third main body 410 to form the platen body 100, and the second main body 320 is covered on the fourth main body 420 to form the movable pressing arm 200. The first cover plate 300 and the second cover plate 400 are separately arranged, and the shapes of the first cover plate 300 and the second cover plate 400 can be the same, such as both are T-shaped. The shape and size of the first main body 310 and the third main body 410 can be the same, and the shape and size of the second main body 320 and the fourth main body 420 can be the same. When the first cover plate 300 is covered on the second cover plate 400, the edge of the first cover plate 300 and the edge of the second cover plate 400 can be completely fitted to form the platen body 100 and the movable pressing arm 200. Among them, the first cover plate 300 and the second cover plate 400 can be detachably connected or fixedly connected. For example, screw holes can be opened in the first cover plate 300 and the second cover plate 400, and the screw holes on the first cover plate 300 and the second cover plate 400 are penetrated by studs, so that the first cover plate 300 and the second cover plate 400 can be detachably connected. For example, after the first cover plate 300 and the second cover plate 400 are covered, welding can be performed along the edges of the first cover plate 300 and the second cover plate 400 to fix the first cover plate 300 and the second cover plate 400, etc. Thus, the pressure plate body 100 and the movable pressure arm 200 are formed by covering the first cover plate 300 and the second cover plate 400, which can simplify the molding difficulty of the pressure plate body 100 and the movable pressure arm 200, further reduce the molding difficulty of the air duct 220 and the air inlet 210, and reduce the production cost.

[0079] Further, the first main body 310 has a first buffer gas groove 311, the second main body 320 has a first ventilation groove 321 connected to the first buffer gas groove 311, the third main body 410 is covered on the notch of the first buffer gas groove 311 to form a buffer gas cavity 120, and the fourth main body 420 is covered on the notch of the first ventilation groove 321 to form an air passage 220. And / or, the third main body 410 has a second buffer gas groove 411, the fourth main body 420 has a second ventilation groove 421 connected to the second buffer gas groove 411, the third main body 410 is covered on the notch of the second buffer gas groove 411 to form a buffer gas cavity 120, and the second main body 320 is covered on the notch of the second ventilation groove 421 to form an air passage 220. The air outlet 110 can be provided on the bottom wall of the first buffer gas groove 311, and the air inlet 210 can be provided on the fourth main body 420 and connected to the second ventilation groove 421.

[0080] The first cover plate 300 may be recessed inward to form a first buffer gas groove 311 and a first ventilation groove 321, and the first buffer gas groove 311 and the first ventilation groove 321 are interconnected. The second cover plate 400 may be recessed inward to form a second buffer gas groove 411 and a second ventilation groove 421, and the second buffer gas groove 411 and the second ventilation groove 421 are interconnected. In one embodiment, the first buffer gas groove 311 and the first ventilation 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 covered to form the pressure plate body 100 and the movable pressure arm 200, the second cover plate 400 is covered on the notch of the first buffer gas groove 311 and the notch of the first ventilation groove 321, and the notch of the first buffer gas groove 311 and the notch of the first ventilation groove 321 are sealed to form the buffer gas cavity 120 and the air passage 220. In another embodiment, the second cache air groove 411 and the second ventilation 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 covered to form the pressure plate body 100 and the movable pressure arm 200, the first cover plate 300 is covered with the notch of the second cache air groove 411 and the notch of the second ventilation groove 421 to seal the notch of the second cache air groove 411 and the notch of the second ventilation groove 421 to form the cache air cavity 120 and the air duct 220. In another embodiment, a first buffer air groove 311 and a first ventilation groove 321 can be formed on the first cover plate 300, and a second buffer air groove 411 and a second ventilation groove 421 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 and the movable pressure arm 200, the first cover plate 300 is covered on the notch of the second buffer air groove 411 and the notch of the second ventilation groove 421 to seal the notch of the second buffer air groove 411 and the notch of the second ventilation groove 421, and the second cover plate 400 is covered on the notch of the first buffer air groove 311 and the notch of the first ventilation groove 321 to seal the notch of the first buffer air groove 311 and the notch of the first ventilation groove 321, so as to form a buffer air cavity 120 through the first buffer air groove 311 and the second buffer air groove 411, and form an air duct 220 through the first ventilation groove 321 and the second ventilation groove 421. Therefore, by simultaneously forming the first cache air groove 311 and the first ventilation groove 321 which are interconnected on the first cover plate 300, and / or simultaneously forming the second cache air groove 411 and the second ventilation groove 421 which are interconnected on the second cover plate, the difficulty of forming the air duct 220, the air inlet 210, the air outlet 110 and the cache air cavity 120 can be reduced, and the production cost can be reduced.

[0081] To summarize, the pressure plate body 100 is used to cover the end face of the welding part 5, and the movable pressure arm 200 is connected to the pressure plate body 100. The welding part 5 can be pressed by the movable pressure arm 200 and the pressure plate body 100 to make the welding part 5 fit tightly with other components, which is convenient for welding the welding part 5 and improves the stability of welding. The pressure plate body 100 can also be driven by the movable pressure arm 200 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200 and / or the pressure plate body 100, so as to facilitate welding along the edge of the welding part 5 while pressing the welding part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0082] In order to solve the technical problems existing in the related embodiments, the present application also provides a welding system, see Fig. 9 , Fig. 9 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 platen 10 of any of the above-mentioned embodiments. The welding platen 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, and laser welding has high welding efficiency and safety performance. Laser welding is to heat the surface to be processed by laser radiation, and the surface heat diffuses to the inside through heat conduction. By controlling the 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 the two parts together. Of course, in other embodiments, the welding device 30 may include but is not limited to a gas welding device, a fusion welding device, an ultrasonic welding device, etc. Among them, 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 pressing arm 200 so that the movable pressing arm 200 presses the weldment 5 through the pressure plate body 100, and the conveying device can convey the weldment 5 to the welding station, etc.

[0085] In order to solve the technical problems existing in the relevant embodiments, the present application also provides a welding method, which can be applied to the above-mentioned welding system 20, see Fig.10 , Fig.10 It is a schematic flow chart of a welding method according to one or more embodiments, specifically, it includes the following steps S101 to S103.

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

[0087] The welding part 5 can be the pole cover plate 2 mentioned above. Of course, in other application scenarios, the welding part 5 can also be other parts that need to be welded. For example, when the welding part 5 is the pole cover plate 2, the pole cover plate 2 can be first installed in the hollow groove of the pole body 3, and then the battery cell 1 is transported to the welding station, and the pressure plate body 100 is then covered on the end face of the pole cover plate 2 at the welding station, and a downward pressing force is applied to the movable pressure arm 200, so that the movable pressure arm 200 presses the end face of the welding part 5 through the pressure plate body 100, so that the pole cover plate 2 and the pole body 3 are tightly fitted, which is convenient for subsequent welding of the pole cover plate 2 and improves the stability of welding.

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

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

[0090] Step S103: During the welding process of the weldment by the welding device, the movable pressing arm drives the pressing plate body to move relative to the weldment to change the position of the weldment edge blocked by the movable pressing arm and / or the pressing plate body.

[0091] The process of welding the weldment 5 by the welding device 30 can be understood as: the process of the welding device 30 welding the weldment 5 uninterruptedly, or, without considering whether the welding is interrupted, the entire process from the welding device 30 starting welding to the completion of the final welding can be the process of the welding device 30 welding the weldment 5. During the welding process, the pressing plate body 100 and / or the movable pressing arm 200 may block the position to be welded, and at this time, the movable pressing arm 200 can be moved relative to the weldment 5 to change the position of the edge of the weldment 5 blocked by the pressing plate body 100 and / or the movable pressing arm 200. Exemplarily, the movable pressing arm 200 is connected to the side of the pressing plate body 100 facing away from the welding part 5, and is extended in the direction away from the welding part 5. The area of ​​the end face of the pressing plate body 100 used to cover the welding part 5 is larger than the area of ​​the end face of the welding part 5. At this time, when the pressing plate body 100 covers the end face of the welding part 5, the pressing plate body 100 will block the position of the edge of the welding part 5, while the movable pressing arm 200 will not block the position of the edge of the welding part 5. The pressing plate body 100 can be driven to move relative to the welding part 5 by the movable pressing arm 200 to change the position of the edge of the welding part 5 blocked by the pressing plate body 100. Exemplarily, the movable pressure arm 200 can be extended along the direction of the side wall of the pressure plate body 100. The area of ​​the end face of the pressure plate body 100 used to cover the welding part 5 is smaller than the area of ​​the end face of the welding part 5. At this time, when the pressure plate body 100 covers the end face of the welding part 5, the pressure plate body 100 will not block the position of the edge of the welding part 5, while the movable pressure arm 200 will block the position of the edge of the welding part 5. The movable pressure arm 200 can be used to drive the pressure plate body 100 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200. Exemplarily, the movable pressure arm 200 can be extended along the direction of the side wall of the pressure plate body 100, and the area of ​​the end face of the pressure plate body 100 used to cover the welding part 5 is larger than the area of ​​the end face of the welding part 5. At this time, when the pressure plate body 100 covers the end face of the welding part 5, the pressure plate body 100 and the movable pressure arm 200 will both block the position of the edge of the welding part 5. The movable pressure arm 200 can be used to drive the pressure plate body 100 to move relative to the welding part 5 to change the position of the edge of the welding part 5 blocked by the movable pressure arm 200 and the pressure plate body 100.

[0092] Through the above-mentioned embodiment, the welding part 5 is pressed by moving the pressing arm 200 and the pressing plate body 100 so that the welding part 5 and other components are tightly fitted together, which facilitates welding of the welding part 5 and improves the stability of welding. In addition, during the welding process, the position of the edge of the welding part 5 blocked by the moving pressing arm 200 and / or the pressing plate body 100 can be changed by moving the moving pressing arm 200, which facilitates welding along the edge of the welding part 5 while pressing the welding part 5, thereby improving the reliability of welding and the convenience of the welding process.

[0093] In some embodiments, the step of moving the pressing arm 200 to drive the pressing plate body 100 to move relative to the weldment 5 includes: moving the pressing arm 200 to drive the pressing plate body 100 to be spaced apart from the end face of the weldment 5; in a state where the pressing plate body 100 is spaced apart from the end face of the weldment 5, the moving pressing arm 200 drives the pressing plate body 100 to move relative to the weldment 5. For example, when it is necessary to move the pressing arm 200 to drive the pressing plate body 100 to move, the moving pressing arm 200 can be first raised by a predetermined interval through other devices, so that the moving pressing arm 200 drives the pressing plate body 100 to be spaced apart from the end face of the weldment 5, wherein the predetermined interval can be set according to actual conditions, and illustratively, the predetermined interval can be less than 0.5 mm, etc., so as to minimize the welding beads generated during welding due to the large predetermined interval during the movement process and enter the end face of the weldment 5. After the pressure plate body 100 is spaced apart from the end face of the welding part 5, the pressure arm 200 can be moved to drive the pressure plate body 100 to move relative to the welding part 5, thereby alleviating the risk of damaging the welding part 5 and the welding pressure plate 10 due to friction with the welding part 5 during the movement, thereby improving the welding efficiency and yield rate.

[0094] Further, after the step of moving the pressing arm 200 to drive the pressing plate body 100 to be spaced from the end face of the weld 5, the welding method further includes: inputting a positive pressure airflow to the air outlet of the pressing plate body 100 through the air inlet 210 of at least one of the pressing plate body 100 and the moving pressing arm 200. The pressing plate body 100 may be provided with an air outlet 110, the opening of the air outlet 110 is located at the pressing plate body 100 for pressing the end face of the weld 5, and at least one of the pressing plate body 100 and the moving pressing arm 200 may be provided with an air inlet 210, and the air inlet 210 is connected to the air outlet 110. After the moving pressing arm 200 drives the pressing plate body 100 to be spaced from the end face of the weld 5, the welding beads generated by the welding device 30 during welding may enter the position of the end face of the weld 5. At this time, by inputting the positive pressure airflow, the positive pressure airflow can hit the end face of the weld 5 and can diffuse outward along the end face of the weld 5 to alleviate the risk of the welding beads generated during welding entering the end face of the weld 5. The input positive pressure airflow may include but is not limited to inert gases such as nitrogen, so as to help the effective forming of the weld and the roundness and smoothness of the weld after forming. Thus, the positive pressure airflow is output to the air outlet 110 through the air inlet 210, so that during the movement of the welding plate 10, the welding beads generated during welding are blown away from the end face of the weld 5 by the positive pressure airflow, thereby alleviating the risk of the welding beads splashing to the end face of the weld 5 during welding.

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

[0096] The pressing plate body 100 is extended along the first direction X1. In the second direction X2 perpendicular to the first direction X1, the pressing plate body 100 covers the non-edge area of ​​the end surface of the welding member 5. The movable pressing arm 200 is extended along the second direction X2. The step of moving the pressing arm 200 to drive the pressing plate body 100 to move relative to the welding member 5 includes: if it is detected that the welding device 30 is welded from the first point A1 to the second point A2 along the welding direction Y; wherein the first point A1 is closer to the movable pressing arm 200 than the second point A2 in the welding direction Y; the movable pressing arm 200 drives the pressing plate body 100 to move from the first position along the first direction X1 to the second position; wherein the first position includes: a position where the movable pressing arm 200 is between the first point A1 and the second point A2 in the welding direction Y, and the second position includes: a position where the movable pressing arm 200 covers the first point A1 and the second point A2 in the welding direction Y.

[0097] The welding direction Y can be understood as the direction of the welding track formed by the welding device 30 during the welding process. For example, when the welding device 30 welds the edge of the weldment 5 in a clockwise direction, the welding direction Y is in a clockwise direction. When the welding device 30 welds the edge of the weldment 5 in a counterclockwise direction, the welding direction Y is in a counterclockwise direction. Fig.11 As shown, when the movable pressure arm 200 is in the first position, the welding device 30 can start from the first point A1 and weld to the second point A2 in the counterclockwise direction. The first point A1 can be a position close to the movable pressure arm 200. For example, the first point A1 is a position with a predetermined spacing from the movable pressure arm 200. For example, the predetermined spacing can be a position greater than 2 mm, etc., 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: the path length between the first point A1 and the second point A2 along the welding direction Y accounts for one-third, one-half, two-fifths or three-fifths of the path length of the edge of the weldment 5, etc. Fig.12 As shown, when it is detected that the welding device 30 is welded to the second point A2, a control signal can be generated to control the movable pressing arm 200 to rotate from the first position to the second position through the control signal. At the second position, the movable pressing arm 200 and the pressing 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 edge of the welded part 5 between the first point A1 and the second point A2 has completed the welding operation, the movable pressing arm 200 and the pressing plate body 100 move to this position, which can alleviate the movable pressing arm 200 and the pressing plate body 100 from blocking the edges of other welded parts 5 that have not been welded.

[0098] In some embodiments, the extension length of the pressing plate body 100 in the first direction X1 is greater than the extension length of the end face of the welding piece 5 in the first direction X1; at the first position, the pressing plate body 100 does not block the edge of the welding piece 5 between the first point A1 and the second point A2 in the first direction X1; at the second position, the pressing plate body 100 does not block the edge of the welding piece 5 between the first point A1 and the second point A2 in the opposite direction of the first direction X1. The end face of the welding piece 5 can be blocked by the pressing plate body 100, thereby alleviating the risk of welding beads splashing onto the end face of the welding piece 5 during welding. At the same time, the position of the edge of the welding piece 5 blocked by the pressing plate body 100 and the movable pressing arm 200 can be changed by simply moving the pressing plate body 100 in the first direction X1, thereby alleviating the operation of the pressing plate body 100 interfering with the welding along the edge of the welding piece 5, thereby improving the welding efficiency.

[0099] In some embodiments, the step of welding the weldment 5 by the welding device 30 along the edge of the weldment 5 includes: the welding device 30 welds along the edge of the weldment 5 to form a welding track that is closed from beginning to end; the welding device 30 welds along the closed position to a third point A3 to form a closing track; wherein the third point A3 is on the welding track or outside the welding track. The welding track that is closed from beginning to end can be understood as: the welding device 30 starts welding from the starting point and welds the edge of the weldment 5 along the welding direction Y until it is welded to the starting point again to form a circular welding track that is closed from beginning to end. Fig.11 and Fig.12 For example, the first point A1 is used as the starting point, and welding is performed along the welding direction Y, passing through the second point A2, and then welding to the first point A1 to form a circular welding track that is closed from beginning to end. After forming the welding track that is closed from beginning to end, the welding device 30 can continue to weld to the third point A3, and the third point A3 can be any other position except the end face of the welding part 5. For example, the third point A3 can be a position along the welding direction Y to the first point A1 and the second point A2, or the third point A3 can also be located outside the edge of the welding part 5. For example, when the welding part 5 is a pole cover plate 2, the pole cover plate 2 is installed in the hollow groove of the pole body 3, and the third point A3 can be located on the pole body 3. Therefore, after achieving the welding track that is closed from beginning to end, welding is continued to the third point A3, so that the entire welding track is more complete and the stability of the welded product is higher.

[0100] To summarize, the welding part 5 is pressed by moving the pressing arm 200 and the pressing plate body 100 so that the welding part 5 fits tightly with other components, which facilitates welding of the welding part 5 and improves the stability of welding. In addition, during the welding process, the position of the edge of the welding part 5 blocked by the moving pressing arm 200 and / or the pressing plate body 100 can be changed by moving the moving pressing arm 200, which facilitates welding along the edge of the welding part 5 while pressing the welding part 5, thereby improving the reliability of 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 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 plate, characterized in that: The welding platen comprises: The pressing plate body is used to cover the end surface of the welding part; A 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 to change the position of the edge of the weldment blocked by the movable pressure arm and / or the pressure plate body.

2. The welding plate according to claim 1, characterized in that: The pressing plate body is extended along a first direction. In a second direction perpendicular to the first direction, the pressing plate body is used to cover a non-edge area of ​​an end surface of a welding part. The movable pressing arm is extended along the second direction.

3. The welding plate according to claim 2, characterized in that: The movable pressing arm is centrally arranged relative to both ends of the pressing plate body in the first direction.

4. The welding plate according to any one of claims 1 to 3, characterized in that: The pressing plate body is provided with an air outlet hole, the opening of which is located at the end surface of the pressing plate body for pressing the weldment, and at least one of the pressing plate body and the movable pressing arm is provided with an air inlet hole, which is connected to the air outlet hole.

5. The welding plate according to claim 4, characterized in that: The pressure plate body is provided with a buffer air cavity, and the air outlet is connected to the air inlet through the buffer air cavity.

6. The welding plate according to claim 5, characterized in that: The welding plate comprises a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are covered to form the plate body; The first cover plate has a first buffer air groove, and the second cover plate is arranged to cover the notch 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 is covered on the notch of the second buffer air groove to form the buffer air cavity.

7. The welding plate according to claim 5 or 6, characterized in that: There are multiple air outlet holes, and the multiple air outlet holes are connected to the buffer air cavity respectively.

8. The welding pressure plate according to any one of claims 5 to 7, characterized in that: The air inlet hole is arranged on the movable pressing arm, and the movable pressing arm is provided with an air passage connecting the air inlet hole and the buffer air cavity.

9. The welding plate according to claim 8, characterized in that: The welding pressing plate comprises a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are covered to form the movable pressing arm; The first cover plate has a first ventilation groove, and the second cover plate is covered on the notch of the first ventilation groove to form the ventilation channel; And / or, the second cover plate has a second ventilation groove, and the first cover plate is covered on the notch of the second ventilation groove to form the ventilation channel.

10. The welding plate according to claim 8, 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 is covered on the third main body portion to form the pressure plate body, and the second main body portion is covered on the fourth main body portion to form the movable pressure arm.

11. The welding plate according to claim 10, characterized in that: The first main body has a first buffer gas groove, the second main body has a first ventilation groove connected to the first buffer gas groove, the third main body is covered on the notch of the first buffer gas groove to form a buffer gas cavity, and the fourth main body is covered on the notch of the first ventilation groove to form the ventilation channel; And / or, the third main body has a second cache air groove, the fourth main body has a second ventilation groove connected to the second cache air groove, the third main body covers the groove of the second cache air groove to form a cache air cavity, and the second main body covers the groove of the second ventilation groove to form the air duct.

12. A welding system, characterized in that: The welding system comprises a welding device and a welding platen as claimed in any one of claims 1 to 11, wherein the welding platen is used to press the weldment, and the welding device is used to weld the weldment along an edge of the weldment.

13. A welding method, characterized in that: The welding method is applied to the welding system according to claim 12, and the welding method comprises: The movable pressing arm presses the end surface of the welding part through the pressing plate body; The welding device welds the welded part along the edge of the welded part; During the process of welding the weldment by the welding device, the movable pressing arm drives the pressing plate body to move relative to the weldment to change the position of the weldment edge blocked by the movable pressing arm and / or the pressing plate body.

14. The welding method according to claim 13, characterized in that: The step of moving the pressing arm to drive the pressing plate body to move relative to the welding part comprises: The movable pressing arm drives the pressing plate body to be spaced apart from the end surface of the welding part; When the pressing plate body is spaced apart from the end surface of the welding piece, the movable pressing arm drives the pressing plate body to move relative to the welding piece.

15. The welding method according to claim 14, characterized in that: After the step of moving the pressing arm to drive the pressing plate body to be spaced apart from the end surface of the welding part, the welding method further comprises: A positive pressure airflow is input to the air outlet of the pressing plate body through the air inlet hole of at least one of the pressing plate body and the movable pressing arm.

16. The welding method according to any one of claims 13 to 15, characterized in that: The pressing plate body is extended along a first direction, and in a second direction perpendicular to the first direction, the pressing plate body is used to cover the non-edge area of ​​the end surface of the welding part, and the movable pressing arm is extended along the second direction; The step of moving the pressing arm to drive the pressing plate body to move relative to the welding part comprises: If it is detected that the welding device is welding from a first point to a second point along a welding direction; wherein the first point is closer to the movable pressing arm than the second point in the welding direction; The movable pressure arm drives the pressure plate body to move from the first position to the second position along the first direction; wherein, the first position includes: the position where the movable pressure arm is between the first point and the second point in the welding direction, and the second position includes: the position where the movable pressure arm blocks the first point and the second point in the welding direction.

17. The welding method according to claim 16, characterized in that: The extension length of the pressing plate body in the first direction is greater than the extension length of the end surface of the welding piece in the first direction; At the first position, the pressing plate body does not cover the edge of the welding piece between the first point and the second point in the first direction; At the second position, the pressure plate body does not cover the edge of the welding part between the first point and the second point in the direction opposite to the first direction.

18. The welding method according to any one of claims 13 to 17, characterized in that: The step of welding the welded part by the welding device along the edge of the welded part comprises: The welding device welds along the edge of the welded part to form a closed welding track; The welding device welds along the closed part of the head and tail to a third point to form a finishing track; wherein the third point is on the welding track or outside the welding track.

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