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 used for pressing a welding part, the pressing plate body is provided with a first welding track and a second welding track, the first welding track and the second welding track are spaced and penetrate through the two opposite side surfaces of the pressing plate body respectively, and the pressing plate body covers the end face of the welding part. The first welding track is used for exposing part of edges of the weldment, and the second welding track is used for exposing other edges of the weldment. Therefore, the first welding track and the second welding track can jointly expose the edge of the welding part, welding can be carried out along the edge of the welding part while the welding part is pressed, and therefore the welding reliability and the convenience of the welding process are improved, and the pressing plate body can also shield the non-edge position of the end face of the welding part. The risk that welding beads splash to the end face of a welding piece during welding can be relieved.

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, the welding platen includes a platen body for pressing a welding part, the platen body is provided with a first welding track and a second welding track, the first welding track and the second welding track are spaced apart, the first welding track and the second welding track respectively penetrate the opposite two side surfaces of the platen body, the platen body is covered on the end face of the welding part, the first welding track is used to expose part of the edge of the welding part, and the second welding track is used to expose the remaining part of the edge of the welding part. Thus, the platen body is used to press the welding part, and the welding part and other parts can be closely fitted by the platen body, which is convenient for welding the welding part and improving the stability of welding, and the platen body has the first welding track and the second welding track, the first welding track and the second welding track can jointly expose the edge of the welding part, which is convenient for welding along the edge of the welding part while pressing the welding part, thereby improving the reliability of welding and the convenience of the welding process, and the platen body can also cover the non-edge position of the end face of the welding part, which can alleviate the risk of welding beads splashing to the end face of the welding part during welding.

[0006] In some embodiments, the pressing plate body includes a first pressing plate and a second pressing plate which are separately arranged, the first pressing plate and the second pressing plate are respectively used to press the welding piece, the first welding track is located on the first pressing plate, and the second welding track is located on the second pressing plate. Thus, the first pressing plate and the second pressing plate are separately arranged, which can facilitate the formation of the first welding track on the first pressing plate, and facilitate the formation of the second welding track on the second pressing plate, reduce the difficulty of forming the first welding track and the second welding track, and improve production efficiency. In addition, the first welding track and the second welding track are respectively located on the first pressing plate and the second pressing plate, which can also more quickly switch the edge positions of the welding piece exposed by the first welding track and the second welding track, thereby improving welding efficiency.

[0007] In some embodiments, the number of the first welding tracks and the number of the second welding tracks are at least two, at least two of the first welding tracks and at least two of the second welding tracks are spaced apart, one first welding track corresponds to one second welding track, the welding pressure plate cover is provided on at least two end faces of the welding parts, one first welding track is used to expose a partial edge of the welding part, and one second welding track corresponding to the first welding track is used to expose the remaining edge of the welding part. Thus, by simultaneously providing two first welding tracks and two second welding tracks, the partial edges of the two welding parts can be exposed simultaneously through the two first welding tracks, and the remaining edges of the two welding parts can be exposed simultaneously through the two second welding tracks, and the edges of the two welding parts can be welded simultaneously, thereby improving welding efficiency.

[0008] In some embodiments, the opening area of ​​the first welding track on the side of the pressure plate body away from the welding part is larger than the opening area of ​​the first welding track on the side of the pressure plate body facing the welding part; and / or, the opening area of ​​the second welding track on the side of the pressure plate body away from the welding part is larger than the opening area of ​​the second welding track on the side of the pressure plate body facing the welding part. Thus, the opening area of ​​the welding track on the side of the pressure plate body away from the welding part is larger, which can facilitate the welding laser to be incident on the edge of the welding part obliquely compared to the end face of the welding part to complete the operation of welding the edge of the welding part, thereby alleviating the risk of the welding laser being reflected by the end face of the welding part and affecting the welding due to the vertical incidence of the welding laser on the edge of the welding part, and the opening area of ​​the welding track on the side of the pressure plate body facing the welding part is smaller, which can shield the end face of the welding part with a larger area of ​​the pressure plate body, further alleviating the risk of welding beads splashing to the end face of the welding part during welding.

[0009] In some embodiments, the opening area of ​​the first welding track gradually decreases from the side of the pressing plate body away from the welding part to the side of the pressing plate body facing the welding part; and / or, the opening area of ​​the second welding track gradually decreases from the side of the pressing plate body away from the welding part to the side of the pressing plate body facing the welding part. In this way, the risk of the pressing plate body interfering with the welding laser when the welding laser is obliquely incident on the edge of the welding part can be further alleviated, and the risk of the welding laser being reflected by the end face of the welding part and affecting the welding due to the welding laser being vertically incident on the edge of the welding part can be alleviated.

[0010] In some embodiments, the first welding track includes a first track segment, the second welding track includes a second track segment, and the first track segment and the second track segment are both arc-shaped. Thus, the first track segment and the second track segment are both arc-shaped, and when the weldment is exposed through the first track segment and the second track segment, the annular edge of the weldment can be exposed, which is convenient for welding the annular edge of the weldment.

[0011] In some embodiments, the first welding track also includes two third track segments, the two ends of the first track segment are respectively connected to one end of the third track segment and one end of the other third track segment, and the other ends of the two third track segments extend away from the first track segment in the same direction; and / or, the second welding track includes two fourth track segments, the two ends of the second track segment are respectively connected to one end of the fourth track segment and one end of the other fourth track segment, and the other ends of the two fourth track segments extend away from the second track segment in the same direction. Thus, the first welding track includes the first track segment and the two third track segments, the two third track segments extend away from the first track segment, and / or the second welding track includes the second track segment and the two fourth track segments, when the weldment is exposed through the first welding track and the second welding track, the edge of the weldment in a ring shape or a runway shape can be exposed, which is convenient for welding the edge of the weldment in a ring shape or a runway shape, thereby increasing the diversity of the shape of the exposed weldment edge to adapt to weldments of more shapes.

[0012] In some embodiments, the platen body is further provided with a first welding hole, which penetrates the opposite surfaces of the platen body; the first welding hole is arranged opposite to the first track segment and at intervals, and the first welding hole is used to expose part of the edge of the remaining part; and / or, the first welding hole is arranged opposite to the second track segment and at intervals, and the first welding hole is used to expose part of the edge of the part. Thus, the first welding hole is arranged at the relative position of the first track segment, and after the edge of the part of the weld is exposed and welded by the first welding track, before the edge of the remaining weld is exposed and welded by the second welding track, the edge of the remaining weld is partially welded through the first welding hole, so as to alleviate the risk of the weld being lifted after the first welding track is removed, which affects the subsequent welding. And / or, the first welding hole is arranged at the relative position of the second track segment, and after the edge of the part of the weld is exposed and welded by the second welding track, before the edge of the part of the weld is exposed and welded by the first welding track, the edge of the part of the weld is partially welded through the first welding hole, so as to alleviate the risk of the weld being lifted after the second welding track is removed, which affects the subsequent welding.

[0013] In some embodiments, the first welding track includes a fifth track segment and two sixth track segments, the two sixth track segments are arc-shaped, the inner arc sides of the two sixth track segments are arranged oppositely, and in the two sixth track segments, one opposite end is respectively connected to the two ends of the fifth track segment, and the other opposite end is arranged at intervals; and / or, the second welding track includes a seventh track segment and two eighth track segments, the two eighth track segments are arc-shaped, the inner arc sides of the two eighth track segments are arranged oppositely, and one opposite end of the two eighth track segments is respectively connected to the two ends of the seventh track segment, and the other opposite end is arranged at intervals. Thus, the first welding track includes a fifth track segment and two sixth track segments, the two sixth track segments are arc-shaped, and / or the second welding track includes a seventh track segment and two eighth track segments, the two eighth track segments are arc-shaped, and when the weldment is exposed through the first welding track and the second welding track, the runway-shaped weldment edge can be exposed, which is convenient for welding the runway-shaped weldment edge, thereby increasing the diversity of the shape of the exposed weldment edge to adapt to weldments of more shapes.

[0014] In some embodiments, the platen body is further provided with a second welding hole, which penetrates the opposite surfaces of the platen body; the second welding hole is located between the two ends of the two sixth track segments, and the second welding hole is used to expose part of the edge of the remaining part; and / or, the second welding hole is located between the two ends of the two eighth track segments, and the second welding hole is used to expose part of the edge of the part. Thus, a second welding hole is provided at the interval between the two sixth track segments, and after the edge of the part of the weld is exposed and welded by the first welding track, before the edge of the remaining weld is exposed and welded by the second welding track, the edge of the remaining weld is partially welded through the second welding hole, so as to alleviate the risk of the weld lifting after the first welding track is removed, which affects the subsequent welding. And / or, a second welding hole is provided at the interval between the two eighth track segments, and after the edge of the part of the weld is exposed and welded by the second welding track, before the edge of the part of the weld is exposed and welded by the first welding track, the edge of the part of the weld is partially welded through the second welding hole, so as to alleviate the risk of the weld lifting after the second welding track is removed, which affects the subsequent welding.

[0015] In some embodiments, the first welding track includes a first sub-segment and a second sub-segment, the first sub-segment and the second sub-segment are both arc-shaped, and the inner arc sides of the first sub-segment and the second sub-segment are opposite and spaced apart. Thus, the first welding track includes both the first sub-segment and the second sub-segment in an arc shape, which can facilitate the second welding track to reveal the edge of the welding piece in an annular or runway shape, and facilitate welding the edge of the welding piece in an annular or runway shape, thereby increasing the diversity of the shape of the exposed edge of the welding piece to adapt to welding pieces of more shapes.

[0016] In some embodiments, the first welding track further includes two third sub-segments and two fourth sub-segments, the two ends of the first sub-segment are respectively connected to one end of the third sub-segment and one end of another third sub-segment, the other ends of the two third sub-segments are extended toward the second sub-segment, the two ends of the second sub-segment are respectively connected to one end of the fourth sub-segment and one end of another fourth sub-segment, the other ends of the two fourth sub-segments are extended toward the first sub-segment, and the other end of the third sub-segment is opposite to the fourth sub-segment and spaced apart. Thus, the first welding track can facilitate the cooperation with the second welding track to reveal the edge of the welded part in a runway shape, facilitate the welding of the edge of the welded part in a runway shape, thereby increasing the diversity of the shape of the exposed welded part edge to adapt to welded parts of more shapes.

[0017] In some embodiments, the second welding track includes two fifth sub-segments, the two fifth sub-segments are extended in the same direction, and the two fifth sub-segments are spaced apart in a direction perpendicular to the extension. Thus, the second welding track includes two fifth sub-segments extending in the same direction, which can simplify the complexity of the second welding track and improve production efficiency. The second welding track can cooperate with the first welding track to reveal the edge of the welded part in a runway shape, which is convenient for welding the edge of the welded part in a runway shape, thereby increasing the diversity of the shape of the exposed welded part edge to adapt to welded parts of more shapes.

[0018] 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 welding part, and the welding device is used to weld the welding part along the edge of the welding part.

[0019] 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: pressing the end face of the welding part by the pressure plate body so that the first welding track exposes part of the edge of the welding part; welding the part of the edge of the welding part exposed by the first welding track by the welding device to form a partial welding track; exposing the remaining part of the edge of the welding part by the second welding track; welding the remaining part of the edge of the welding part exposed by the second welding track by the welding device to form a welding track closed at both ends. Thus, by pressing the end face of the welding part through the pressure plate body, the welding part and other components can be closely fitted together through the pressure plate body, which is convenient for welding the welding part and improves the stability of welding. After the welding device welds the partial edge exposed by the first welding track, the remaining edge of the welding part is exposed by the second welding track, and the welding device continues to weld the remaining edge exposed by the second welding track to form a welding track closed from beginning to end, which can facilitate welding along the edge of the welding part while pressing the welding part, thereby improving the reliability of welding and the convenience of the welding process. The pressure plate body can also cover the non-edge position of the end face of the welding part, which can reduce the risk of welding beads splashing to the end face of the welding part during welding.

[0020] In some embodiments, the step of revealing the remaining edge of the welded part through the second welding track includes: adjusting the position of the pressing plate body pressed on the end surface of the welded part so that the second welding track reveals the remaining edge of the welded part. Thus, the remaining edge of the welded part can be revealed through the second welding track only by adjusting the position of the pressing plate body, which can simplify the process of revealing the edge of the welded part during welding and improve welding efficiency.

[0021] In some embodiments, the pressing plate body includes a first pressing plate and a second pressing plate which are separately arranged, the first welding track is located on the first pressing plate, and the second welding track is located on the second pressing plate; the step of pressing the end face of the welding part through the pressing plate body includes: pressing the end face of the welding part through the first pressing plate; the step of revealing the edge of the remaining part of the welding part through the second welding track includes: separating the first pressing plate and the welding part; pressing the end face of the welding part through the second pressing plate to reveal the edge of the remaining part of the welding part through the second welding track. Thus, the first pressing plate and the second pressing plate are separately arranged, which can facilitate the formation of the first welding track on the first pressing plate and the formation of the second welding track on the second pressing plate, reduce the difficulty of forming the first welding track and the second welding track, and improve production efficiency, and the first welding track and the second welding track are respectively located on the first pressing plate and the second pressing plate, and the welding part is pressed by the first pressing plate and the second pressing plate respectively, so that the edge position of the welding part revealed by the first welding track and the second welding track can be switched more quickly, thereby improving welding efficiency.

[0022] In some embodiments, the step of pressing the end face of the weldment by the first pressing plate includes: placing the weldment at a first welding station; at the first welding station, pressing the end face of the weldment by the first pressing plate; the step of pressing the end face of the weldment by the second pressing plate includes: placing the weldment at a second welding station; at the second welding station, pressing the end face of the weldment by the second pressing plate. Thus, by pressing the end face of the weldment by the first pressing plate at the first welding station and by the second pressing plate at the second welding station, the risk of interference between the first pressing plate and the second pressing plate in pressing the weldment can be alleviated, and the corresponding welding operation is performed at a specific station, which can further improve the welding efficiency of the weldment. 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 1 is 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 3is a schematic diagram of the separate structure of a welding plate and 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 is a second structural schematic diagram of a welding plate according to one or more embodiments;

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

[0030] Figure 7 is a fourth structural schematic diagram of a welding plate according to one or more embodiments;

[0031] Figure 8 is a fifth structural schematic diagram of a welding plate according to one or more embodiments;

[0032] Fig. 9 is a sixth structural schematic diagram of a welding plate according to one or more embodiments;

[0033] Fig.10 is a seventh structural schematic diagram of a welding plate according to one or more embodiments;

[0034] Fig.11 is a schematic block diagram of a welding system according to one or more embodiments;

[0035] Fig.12 is a schematic flow chart of a welding method according to one or more embodiments.

[0036] Figure numbers: battery cell 1; pole cover 2; pole body 3; shell 4; welding part 5; welding pressure plate 10; welding system 20; welding device 30; pressure plate body 11; first pressure plate 12; second pressure plate 13; first welding track 100; second welding track 200; first track segment 310; second track segment 320; third track segment 330; fourth track segment 340; fifth track segment 350; sixth track segment 360; seventh track segment 370; eighth track segment 380; first welding hole 410; second welding hole 420; first sub-segment 510; second sub-segment 520; third sub-segment 530; fourth sub-segment 540; fifth sub-segment 550. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] 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).

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The shape of the battery may include but is not limited to a square, cylindrical or other arbitrary shapes.

[0049] 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.

[0050] See also Figure 1 , Figure 1 is a schematic structural diagram of a battery cell according to one or more embodiments.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Specifically, the welding process may be non-disposable. For example, during the welding process, the position of the edge of the pole cover plate 2 exposed by the welding pressure plate may be changed to complete the welding operation of the pole cover plate 2 and the pole body 3 in the case of multiple intermittent welding operations. There may be two electrode columns on the battery cell 1, and the pole cover plates 2 and pole bodies 3 of the two electrode columns may be fixed by welding. In the actual operation process, the pole cover plate 2 of one electrode column may be pressed by the welding pressure plate 10 first, and after the welding operation of the pole cover plate 2 and pole body 3 of one electrode column is completed, the welding operation of the pole cover plate 2 and pole body 3 of the other electrode column may be performed. Alternatively, the pole cover plates 2 of the two electrode columns may be pressed simultaneously by the welding pressure plate 10, and then the pole cover plates 2 and pole bodies 3 of the two electrode columns are welded simultaneously.

[0057] In order to relieve the welding pressure plate 10 from blocking the position where welding is required while pressing the welded part, the present application provides a welding pressure plate, see Figure 3 , Figure 3 It is a schematic diagram of the separate structure of a welding platen and a welding part according to one or more embodiments.

[0058] The welding platen 10 includes a platen body 11 for pressing the welding part 5. The welding part 5 may be the pole cover 2 mentioned above. Of course, in other application scenarios, the welding part 5 may also be other parts that need to be welded. The platen body 11 may be plate-shaped, and the shape of the platen body 11 may be arbitrary. For example, the end face of the platen body 11 may be circular, elliptical, runway-shaped, polygonal, and the like. The area of ​​the end face of the platen body 11 may be larger than the area of ​​the end face of the welding part 5. When the platen body 11 is pressed on the welding part 5, the platen body 11 may completely cover the end face of the welding part 5. Specifically, the area of ​​the end face of the platen body 11 may be larger than the sum of the areas of the end faces of multiple welding parts 5, so that the platen body 11 may be pressed on multiple welding parts 5 at the same time, and may cover multiple end faces of welding parts 5 at the same time.

[0059] The platen body 11 is provided with a first welding track 100 and a second welding track 200, the first welding track 100 and the second welding track 200 are spaced apart, the first welding track 100 and the second welding track 200 respectively penetrate the opposite surfaces of the platen body 11, the platen body 11 is covered on the end surface of the welding part 5, the first welding track 100 is used to expose part of the edge of the welding part 5, and the second welding track 200 is used to expose the remaining edge of the welding part 5. The first welding track 100 and the second welding track 200 can be in any shape, for example, the first welding track 100 and the second welding track 200 can be in a U-shaped track, an S-shaped track, a straight track, a wavy track, etc., and the two ends of the first welding track 100 and the corresponding two ends of the second welding track 200 can be connected to form a closed loop. The first welding track 100 and the second welding track 200 can both pass through the two opposite surfaces of the pressure plate body 11, so that the first welding track 100 and the second welding track 200 are both welding tracks in the form of through holes. When the pressure plate body 11 is pressed on the welding part 5, at least one of the first welding track 100 and the second welding track 200 can be used to expose at least part of the end face of the welding part 5. When welding is required along the edge of the welding part 5, the pressure plate body 11 can be pressed on the welding part 5, and the first welding track 100 can be made to correspond to the partial edge position of the welding part 5, so that the partial edge of the welding part 5 is exposed through the first welding track 100, so as to facilitate the welding operation on the partial edge exposed by the first welding track 100. After the welding operation is performed on the partial edge of the welding part 5, the pressure plate body 11 can be replaced and pressed on the position of the welding part 5, and the second welding track 200 can be made to correspond to the remaining edge position of the welding part 5, so that the remaining edge of the welding part 5 is exposed through the second welding track 200, so as to facilitate the welding operation on the remaining edge exposed by the second welding track 200, thereby completing the welding operation along the edge of the welding part 5.

[0060] Through the above-mentioned embodiment, the pressure plate body 11 is used to press the welding part 5, and the pressure plate body 11 can make the welding part 5 fit tightly with other parts, which is convenient for welding the welding part 5 and improving the stability of welding. The pressure plate body 11 has a first welding track 100 and a second welding track 200. The first welding track 100 and the second welding track 200 can jointly expose the edge of the welding part 5, which is convenient for 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. The pressure plate body 11 can also cover the non-edge position of the end face of the welding part 5, which can alleviate the risk of welding beads splashing to the end face of the welding part 5 during welding.

[0061] In some embodiments, the opening area of ​​the first welding track 100 on the side of the platen body 11 facing away from the weldment 5 is larger than the opening area of ​​the first welding track 100 on the side of the platen body 11 facing the weldment 5. When the welding along the edge of the weldment 5 is performed by laser welding, the opening area of ​​the first welding track 100 on the side of the platen body 11 facing away from the weldment 5 is larger, and the welding laser can be incident on the edge of the weldment 5 at an angle relative to the end face of the weldment 5, thereby performing laser welding along the edge of the weldment 5. Moreover, since the welding laser is incident at an angle, based on the principle of light reflection, when the laser is incident on the weldment 5, the reflected laser will be emitted at an angle to the incident laser, which can alleviate the risk of the welding laser being vertically incident on the edge of the weldment 5, causing the welding laser to be reflected by the end face of the weldment 5 along the direction of the welding laser incident, thereby affecting the welding. The opening area of ​​the first welding track 100 on the side of the pressure plate body 11 facing the welding part 5 is relatively small. That is, when the welding part 5 is pressed by the pressure plate body 11, the pressure plate body 11 covers other positions of the edge of the welding part 5 exposed by the first welding track 100 on the end face of the welding part 5. The pressure plate body 11 can cover the end face of the welding part 5 with a larger area, further alleviating the risk of welding beads splashing onto the end face of the welding part 5 during welding.

[0062] And / or, the opening area of ​​the second welding track 200 on the side of the platen body 11 facing away from the weldment 5 is larger than the opening area of ​​the second welding track 200 on the side of the platen body 11 facing the weldment 5. When the welding along the edge of the weldment 5 is performed by laser welding, the opening area of ​​the second welding track 200 on the side of the platen body 11 facing away from the weldment 5 is larger, and the welding laser can be incident on the edge of the weldment 5 at an angle relative to the end face of the weldment 5, thereby performing laser welding along the edge of the weldment 5. Moreover, since the welding laser is incident at an angle, based on the principle of light reflection, when the laser is incident on the weldment 5, the reflected laser will be emitted at an angle to the incident laser, which can alleviate the risk of the welding laser being vertically incident on the edge of the weldment 5, causing the welding laser to be reflected by the end face of the weldment 5 along the direction of the welding laser incident, thereby affecting the welding. The opening area of ​​the second welding track 200 on the side of the pressure plate body 11 facing the welding part 5 is smaller, that is, when the welding part 5 is pressed by the pressure plate body 11, the pressure plate body 11 covers other positions of the edge of the welding part 5 exposed by the second welding track 200 on the end face of the welding part 5. The end face of the welding part 5 can be shielded by a larger area of ​​the pressure plate body 11, further reducing the risk of welding beads splashing onto the end face of the welding part 5 during welding.

[0063] Furthermore, the opening area of ​​the first welding track 100 gradually decreases from the side of the platen body 11 away from the welding piece 5 to the side of the platen body 11 toward the welding piece 5. The inner ring wall surface and / or the outer ring wall surface of the first welding track 100 may be inclined so that the opening area of ​​the first welding track 100 gradually decreases. For example, Figure 3 Taking the pressing plate body 11 shown in the figure as an example, the inner ring wall surface and the outer ring wall surface of the first welding track 100 are both inclined. The wall surface of the entire first welding track 100 can be inclined, or the wall surface of part of the first welding track 100 can be inclined. For example, Figure 3 Taking the shown pressing plate body 11 as an example, the first welding track 100 may also be in a stepped form, and the opening area of ​​the first welding track 100 facing away from the welding piece 5 gradually decreases, while the opening area of ​​the first welding track 100 facing the welding piece 5 remains unchanged.

[0064] And / or, the opening area of ​​the second welding track 200 gradually decreases from the side of the pressing plate body 11 away from the welding piece 5 to the side of the pressing plate body 11 facing the welding piece 5. The inner ring wall surface and / or the outer ring wall surface of the second welding track 200 may be inclined so that the opening area of ​​the second welding track 200 gradually decreases. For example, Figure 3 Taking the pressing plate body 11 shown in the figure as an example, the inner ring wall surface and the outer ring wall surface of the second welding track 200 are both inclined. The wall surface of the entire second welding track 200 can be inclined, or the wall surface of part of the second welding track 200 can be inclined. For example, Figure 3Taking the shown pressing plate body 11 as an example, the second welding track 200 may also be in a stepped form, and the opening area of ​​the second welding track 200 away from the welding piece 5 gradually decreases, while the opening area of ​​the second welding track 200 facing the welding piece 5 remains unchanged.

[0065] In this way, the risk of the pressure plate body 11 interfering with the welding laser when the welding laser is obliquely incident on the edge of the weldment 5 can be further alleviated, and the risk of the welding laser being reflected by the end face of the weldment 5 and affecting the welding due to the welding laser being vertically incident on the edge of the weldment 5 can be alleviated.

[0066] See also Figure 4 , Figure 4 is a first structural schematic diagram of a welding plate 10 according to one or more embodiments.

[0067] The number of the first welding tracks 100 and the second welding tracks 200 is at least two, and there is a gap between the at least two first welding tracks 100 and the at least two second welding tracks 200. One first welding track 100 corresponds to one second welding track 200. The welding plate 10 covers the end faces of at least two welding parts 5. One first welding track 100 is used to expose a part of the edge of a welding part 5, and one second welding track 200 corresponding to the first welding track 100 is used to expose the remaining part of the edge of a welding part 5. Figure 4 For example, it includes two first welding tracks 100 and two second welding tracks 200. The first welding track 100 on the left and the second welding track 200 on the left can correspond to each other, and the first welding track 100 on the right and the second welding track 200 on the right can correspond to each other. When the welding pressure plate 10 covers at least two end faces of the welding parts 5, the two first welding tracks 100 can correspond to partial edges of the two welding parts 5 respectively, so that partial edges of the two welding parts 5 are exposed at the same time through the two first welding tracks 100, so as to facilitate the welding operation on the partial edges exposed by the first welding tracks 100. After the welding operation is performed on the partial edges of the two welding parts 5, the pressure plate body 11 can be replaced and pressed on the position of the welding part 5, and the two second welding tracks 200 can be respectively corresponded to the remaining edge positions of the two welding parts 5, so that the remaining edges of the two welding parts 5 are exposed through the second welding tracks 200, so as to facilitate the welding operation on the remaining edges exposed by the two second welding tracks 200, thereby completing the welding operation along the edges of the two welding parts 5. Therefore, by simultaneously setting two first welding tracks 100 and two second welding tracks 200, partial edges of the two welding parts 5 can be exposed simultaneously through the two first welding tracks 100, and the remaining edges of the two welding parts 5 can be exposed simultaneously through the two second welding tracks 200, so that the edges of the two welding parts 5 can be welded at the same time, thereby improving the welding efficiency.

[0068] See also Figure 5 , Figure 5 is a second schematic structural diagram of the welding plate 10 according to one or more embodiments.

[0069] The pressing plate body 11 includes a first pressing plate 12 and a second pressing plate 13 which are separately arranged. The first pressing plate 12 and the second pressing plate 13 are respectively used to press the welding piece 5 . The first welding track 100 is located on the first pressing plate 12 , and the second welding track 200 is located on the second pressing plate 13 . The first pressing plate 12 and the second pressing plate 13 are two independent pressing plates. When welding is required along the edge of the welding piece 5, the first pressing plate 12 can be pressed on the welding piece 5, and the first welding track 100 can be made to correspond to the partial edge position of the welding piece 5, so that the partial edge of the welding piece 5 is exposed through the first welding track 100, which is convenient for welding operation on the partial edge exposed by the first welding track 100. After the welding operation is performed on the partial edge of the welding piece 5, the first pressing plate 12 can be separated from the welding piece 5, and then the welding piece 5 can be pressed by the second pressing plate 13, and the second welding track 200 can be made to correspond to the remaining edge position of the welding piece 5, so that the remaining edge of the welding piece 5 is exposed through the second welding track 200, which is convenient for welding operation on the remaining edge exposed by the second welding track 200, thereby completing the welding operation along the edge of the welding piece 5. Therefore, the first pressing plate 12 and the second pressing plate 13 are separately arranged, which can facilitate the formation of the first welding track 100 on the first pressing plate 12 and the formation of the second welding track 200 on the second pressing plate 13, thereby reducing the difficulty of forming the first welding track 100 and the second welding track 200 and improving production efficiency. In addition, the first welding track 100 and the second welding track 200 are respectively located on the first pressing plate 12 and the second pressing plate 13, and the edge positions of the welding parts 5 exposed by the first welding track 100 and the second welding track 200 can be switched more quickly, thereby improving welding efficiency.

[0070] See also Figure 6 , Figure 6 is a third structural schematic diagram of the welding plate 10 according to one or more embodiments.

[0071] The first welding track 100 includes a first track segment 310, and the second welding track 200 includes a second track segment 320, and the first track segment 310 and the second track segment 320 are both arc-shaped. The first track segment 310 and the second track segment 320 are both arc-shaped. When the welding piece 5 is exposed through the first track segment 310 and the second track segment 320, the edge of the welding piece 5 in a ring shape can be exposed, which is convenient for welding the edge of the welding piece 5 in a ring shape. Exemplarily, when the first track segment 310 and the second track segment 320 are both semicircular arcs, the edge of the welding piece 5 in a circular ring shape can be exposed through the first track segment 310 and the second track segment 320. When the first track segment 310 and the second track segment 320 are both semi-elliptical arcs, the edge of the welding piece 5 in an elliptical shape can be exposed through the first track segment 310 and the second track segment 320.

[0072] Further, the first welding track 100 further includes two third track segments 330, the two ends of the first track segment 310 are respectively connected to one end of the third track segment 330 and one end of the other third track segment 330, and the other ends of the two third track segments 330 extend away from the first track segment 310 in the same direction. The two third track segments 330 may be in a straight line, the two third track segments 330 may be arranged parallel to each other, and the two ends of the first track segment 310 are respectively connected to one end of the two third track segments 330, so that the first welding track 100 may be arranged in a U-shape. When the second welding track 200 includes an arc-shaped second track segment 320, the first welding track 100 and the second welding track 200 may reveal arc-shaped welding edges or runway-shaped welding edges.

[0073] And / or, the second welding track 200 includes two fourth track segments 340, two ends of the second track segment 320 are respectively connected to one end of a fourth track segment 340 and one end of another fourth track segment 340, and the other ends of the two fourth track segments 340 extend away from the second track segment 320 in the same direction. The two fourth track segments 340 may be straight-line-shaped, the two fourth track segments 340 may be arranged parallel to each other, and the two ends of the second track segment 320 are respectively connected to one end of the two fourth track segments 340, so that the second welding track 200 may be arranged in a U-shape. When the first welding track 100 includes the arc-shaped second track segment 320, or the first welding track 100 includes the first track segment 310 and the two third track segments 330, the first welding track 100 and the second welding track 200 may show arc-shaped welding edges or runway-shaped welding edges.

[0074] Thus, the first welding track 100 includes a first track segment 310 and two third track segments 330, the two third track segments 330 extend away from the first track segment 310, and / or the second welding track 200 includes a second track segment 320 and two fourth track segments 340. When the welding part 5 is exposed through the first welding track 100 and the second welding track 200, the edge of the welding part 5 in a circular or runway shape can be exposed, which facilitates the welding of the edge of the welding part 5 in a circular or runway shape, thereby increasing the diversity of the shape of the exposed edge of the welding part 5 to adapt to welding parts 5 of more shapes.

[0075] See also Figure 7 , Figure 7 is a fourth structural schematic diagram of the welding plate 10 according to one or more embodiments.

[0076] The platen body 11 is also provided with a first welding hole 410, which penetrates the opposite surfaces of the platen body 11. The first welding hole 410 is a through hole, and the shape of the first welding hole 410 can be set according to actual conditions. For example, the first welding hole 410 can be a circular hole, an arc hole, a linear hole, etc.

[0077] The first welding hole 410 is opposite to the first track section 310 and is arranged at intervals. The first welding hole 410 is used to expose part of the remaining edge. When welding is required along the edge of the weldment 5, the pressing plate body 11 can be pressed on the weldment 5, and the first welding track 100 is made to correspond to the partial edge position of the weldment 5, so as to expose part of the edge of the weldment 5 through the first welding track 100, and expose part of the remaining edge through the first welding hole 410, so as to facilitate the welding operation on the partial edge exposed by the first welding track 100 and the first welding hole 410. After the welding operation on the partial edge of the weldment 5 is completed, the state of the pressing plate body 11 pressing the weldment 5 is removed. Since the partial edge welding of the weldment 5 and the partial remaining edge welding at the relative position of the partial edge have been completed, the weldment 5 is basically in a fixed state, which alleviates the risk of the weldment 5 being lifted up due to the removal of the pressing plate body 11, thereby affecting the subsequent welding.

[0078] And / or, the first welding hole 410 is opposite to the second track segment 320 and is arranged at intervals, and the first welding hole 410 is used to expose part of the edge. In this embodiment, when the first welding hole 410 is opposite to the second track segment 320 and is arranged at intervals, when welding is required along the edge of the weldment 5, the second welding track 200 can be used to expose the edge of the weldment 5 first, and then the first welding track 100 can be used to expose the edge of the weldment 5. When the first welding hole 410 is opposite to the first track segment 310 and is arranged at intervals, when welding is required along the edge of the weldment 5, the first welding track 100 can be used to expose the edge of the weldment 5 first, and then the second welding track 200 can be used to expose the edge of the weldment 5. When there are two first welding holes 410, one first welding hole 410 is opposite to the first track segment 310 and is spaced apart, and the other first welding hole 410 is opposite to the second track segment 320 and is spaced apart, one of the first welding track 100 and the second welding track 200 can be exposed to part of the edge of the welding part 5 first, and then the other can be exposed to the rest of the edge of the welding part 5.

[0079] Therefore, the first welding hole 410 is provided at the relative position of the first track segment 310, and after the edge of the partial welded part 5 is exposed and welded by the first welding track 100, before the edge of the remaining welded part 5 is exposed and welded by the second welding track 200, the edge of the remaining welded part 5 can be partially welded through the first welding hole 410, so as to alleviate the risk of the welded part 5 tilting after the first welding track 100 is removed, which affects the subsequent welding. And / or, the first welding hole 410 is provided at the relative position of the second track segment 320, and after the edge of the partial welded part 5 is exposed and welded by the second welding track 200, before the edge of the partial welded part 5 is exposed and welded by the first welding track 100, the edge of the partial welded part 5 can be partially welded through the first welding hole 410, so as to alleviate the risk of the welded part 5 tilting after the second welding track 200 is removed, which affects the subsequent welding.

[0080] The opening area of ​​the first welding hole 410 on the side of the platen body 11 away from the welding piece 5 can be larger than the opening area of ​​the first welding hole 410 on the side of the platen body 11 facing the welding piece 5. Further, the opening area of ​​the first welding track 100 can be gradually reduced from the side of the platen body 11 away from the welding piece 5 to the side of the platen body 11 facing the welding piece 5. When the welding along the edge of the welding piece 5 is performed by laser welding, the opening area of ​​the first welding hole 410 on the side of the platen body 11 away from the welding piece 5 is larger, and the welding laser can be incident on the edge of the welding piece 5 at an angle relative to the end face of the welding piece 5, thereby performing laser welding along the edge of the welding piece 5. Moreover, since the welding laser is incident at an angle, based on the principle of light reflection, when the laser is incident on the welding piece 5, the reflected laser will be emitted at an angle with the incident laser, which can alleviate the risk of the welding laser being vertically incident on the edge of the welding piece 5, causing the welding laser to be reflected by the end face of the welding piece 5 along the direction of the welding laser incident, thereby affecting the welding.

[0081] See also Figure 8 , Figure 8 is a fifth structural schematic diagram of the welding platen 10 according to one or more embodiments.

[0082] The first welding track 100 includes a fifth track segment 350 and two sixth track segments 360. The two sixth track segments 360 are arc-shaped. The inner arc sides of the two sixth track segments 360 are arranged opposite to each other. In the two sixth track segments 360, two opposite ends are respectively connected to the two ends of the fifth track segment 350, and the other two opposite ends are arranged at intervals. The two sixth track segments 360 can be semicircular arcs, elliptical arcs, etc. The fifth track segment 350 can be a straight track segment. The two sixth track segments 360 are respectively connected to the two ends of the fifth track segment 350, so that the first welding track 100 can be similar to a partial runway-shaped structure lacking a straight edge. At this time, if it is necessary to reveal the edge of the runway-shaped weldment 5 through the first welding track 100 and the second welding track 200, the second welding track 200 only needs to include a track segment structure with a straight edge.

[0083] And / or, the second welding track 200 includes the seventh track segment 370 and two eighth track segments 380, the two eighth track segments 380 are arc-shaped, the inner arc sides of the two eighth track segments 380 are arranged opposite to each other, and the two opposite ends of the two eighth track segments 380 are respectively connected to the two ends of the seventh track segment 370, and the other two opposite ends are arranged at intervals. The two eighth track segments 380 can be semicircular arc-shaped, elliptical arc-shaped, etc., the sixth track segment 360 can be a straight track segment, and the two eighth track segments 380 are respectively connected to the two ends of the sixth track segment 360, so that the second welding track 200 can be similar to a partial runway-shaped structure lacking a straight edge. If it is necessary to reveal the edge of the runway-shaped weldment 5 through the first welding track 100 and the second welding track 200, the first welding track 100 only needs to include a track segment structure with a straight edge. In this embodiment, the first welding track 100 may include a fifth track segment 350 and two eighth track segments 380, while the second welding track 200 includes a seventh track segment 370 and two eighth track segments 380, so that the first welding track 100 or the second welding track 200 may be arbitrarily selected to successively expose the edge of the welding part 5.

[0084] Thus, the first welding track 100 includes a fifth track segment 350 and two sixth track segments 360, and the two sixth track segments 360 are arc-shaped, and / or the second welding track 200 includes a seventh track segment 370 and two eighth track segments 380, and the two eighth track segments 380 are arc-shaped. When the weldment 5 is exposed through the first welding track 100 and the second welding track 200, the edge of the weldment 5 in a runway shape can be exposed, which facilitates welding of the edge of the weldment 5 in a runway shape, thereby increasing the diversity of the shape of the exposed edge of the weldment 5 to adapt to weldments 5 of more shapes.

[0085] See also Fig. 9 , Fig. 9 is a sixth structural schematic diagram of the welding platen 10 according to one or more embodiments.

[0086] The platen body 11 is also provided with a second welding hole 420, which penetrates the opposite surfaces of the platen body 11. The second welding hole 420 is a through hole, and the shape of the second welding hole 420 can be set according to actual conditions. For example, the second welding hole 420 can be a circular hole, an arc hole, a linear hole, etc.

[0087] The second welding hole 420 is located between the two ends of the six track segments 360 spaced apart, and the second welding hole 420 is used to expose part of the remaining edge. When welding is required along the edge of the weldment 5, the pressing plate body 11 can be pressed on the weldment 5, and the first welding track 100 is made to correspond to the partial edge position of the weldment 5, so as to expose part of the edge of the weldment 5 through the first welding track 100, and expose part of the remaining edge through the second welding hole 420, so as to facilitate the welding operation on the partial edge exposed by the first welding track 100 and the second welding hole 420. After the welding operation on the partial edge of the weldment 5 is completed, the state of the pressing plate body 11 pressing the weldment 5 is removed. Since the partial edge welding of the weldment 5 and the partial remaining edge welding at the relative position of the partial edge have been completed, the weldment 5 is basically in a fixed state, which alleviates the risk of the weldment 5 being lifted up due to the removal of the pressing plate body 11, thereby affecting the subsequent welding.

[0088] And / or, the second welding hole 420 is located between the two ends of the two eighth track segments 380 spaced apart, and the second welding hole 420 is used to expose part of the edge. In this embodiment, when the second welding hole 420 is opposite to the second track segment 320 and spaced apart, when welding is required along the edge of the weldment 5, the second welding track 200 can be used to expose the edge of the weldment 5 first, and then the first welding track 100 can be used to expose the edge of the weldment 5. When the second welding hole 420 is opposite to the first track segment 310 and spaced apart, when welding is required along the edge of the weldment 5, the first welding track 100 can be used to expose the edge of the weldment 5 first, and then the second welding track 200 can be used to expose the edge of the weldment 5. When there are two second welding holes 420, one second welding hole 420 is opposite to the first track segment 310 and is spaced apart, and the other second welding hole 420 is opposite to the second track segment 320 and is spaced apart, one of the first welding track 100 and the second welding track 200 can be first exposed to part of the edge of the welding component 5, and then the other can be exposed to the rest of the edge of the welding component 5.

[0089] Therefore, a second welding hole 420 is provided at the interval between the two sixth track segments 360, and after the edge of the partial welded part 5 is exposed and welded by the first welding track 100, before the edge of the remaining welded part 5 is exposed and welded by the second welding track 200, the edge of the remaining welded part 5 can be partially welded through the second welding hole 420, so as to alleviate the risk of the welded part 5 lifting and affecting the subsequent welding after the first welding track 100 is removed. And / or, a second welding hole 420 is provided at the interval between the two eighth and sixth track segments, and after the edge of the partial welded part 5 is exposed and welded by the second welding track 200, before the edge of the partial welded part 5 is exposed and welded by the first welding track 100, the edge of the partial welded part 5 can be partially welded through the second welding hole 420, so as to alleviate the risk of the welded part 5 lifting and affecting the subsequent welding after the second welding track 200 is removed.

[0090] The opening area of ​​the second welding hole 420 on the side of the pressing plate body 11 away from the welding piece 5 can be larger than the opening area of ​​the second welding hole 420 on the side of the pressing plate body 11 facing the welding piece 5. Further, the opening area of ​​the first welding track 100 can be gradually reduced from the side of the pressing plate body 11 away from the welding piece 5 to the side of the pressing plate body 11 facing the welding piece 5. When the welding along the edge of the welding piece 5 is performed by laser welding, the opening area of ​​the second welding hole 420 on the side of the pressing plate body 11 away from the welding piece 5 is larger, and the welding laser can be incident on the edge of the welding piece 5 at an angle compared to the end face of the welding piece 5, so as to perform laser welding along the edge of the welding piece 5, and because the welding laser is incident at an angle, based on the principle of light reflection, when the laser is incident on the welding piece 5, the reflected laser will be emitted at an angle with the incident laser, which can alleviate the risk of the welding laser being vertically incident on the edge of the welding piece 5, causing the welding laser to be reflected by the end face of the welding piece 5 along the direction of the welding laser incident, thereby affecting the welding.

[0091] See also Fig.10 , Fig.10 is a seventh structural schematic diagram of the welding plate 10 according to one or more embodiments.

[0092] The first welding track 100 includes a first sub-segment 510 and a second sub-segment 520, both of which are arc-shaped, and the inner arc sides of the first sub-segment 510 and the second sub-segment 520 are opposite and spaced apart. The first sub-segment 510 and the second sub-segment 520 are both arc-shaped, and the inner arc sides of the first sub-segment 510 and the second sub-segment 520 are opposite and spaced apart. When the weldment 5 is exposed through the first welding track 100 and the first welding track 100, the edge of the weldment 5 in a ring shape or a runway shape can be exposed. Exemplarily, the first sub-segment 510 and the second sub-segment 520 can both be quarter-circular arc-shaped, and the second welding track 200 can also include two quarter-circular arcs that are spaced apart from each other, so that the edge of the weldment 5 in a ring shape can be exposed through the first welding track 100 and the first welding track 100. Exemplarily, the first sub-segment 510 and the second sub-segment 520 may both be arc-shaped, and the second welding track 200 may include two linear sub-segments arranged at a relative interval, so that the edge of the weldment 5 in a runway shape may be exposed through the first welding track 100 and the first welding track 100. Thus, the first welding track 100 includes both the arc-shaped first sub-segment 510 and the second sub-segment 520, which can facilitate the second welding track 200 to expose the edge of the weldment 5 in a ring or runway shape, and facilitate welding the edge of the weldment 5 in a ring or runway shape, thereby increasing the diversity of the shape of the exposed edge of the weldment 5 to adapt to weldments 5 of more shapes.

[0093] Furthermore, the first welding track 100 also includes two third sub-segments 530 and two fourth sub-segments 540, the two ends of the first sub-segment 510 are respectively connected to one end of a third sub-segment 530 and one end of another third sub-segment 530, the other ends of the two third sub-segments 530 are extended toward the second sub-segment 520, the two ends of the second sub-segment 520 are respectively connected to one end of a fourth sub-segment 540 and one end of another fourth sub-segment 540, the other ends of the two fourth sub-segments 540 are extended toward the first sub-segment 510, and the other end of a third sub-segment 530 is opposite to a fourth sub-segment 540 and is spaced apart.

[0094] The two third sub-segments 530 may be in a straight line, the two third sub-segments 530 may be arranged parallel to each other, and the two ends of the first sub-segment 510 are respectively connected to one end of the two third sub-segments 530, so that the first sub-segment 510 and the two third sub-segments 530 may be arranged in a U-shape. The two fourth sub-segments 540 may be in a straight line, the two fourth sub-segments 540 may be arranged parallel to each other, and the two ends of the second sub-segment 520 are respectively connected to one end of the two fourth sub-segments 540, so that the second sub-segment 520 and the two fourth sub-segments 540 may be arranged in a U-shape, thereby making the first welding track 100 a double U-shaped structure that is opposite and spaced apart. Thus, the first welding track 100 can be conveniently matched with the second welding track 200 to expose the edge of the runway-shaped welding piece 5, and facilitate welding the edge of the runway-shaped welding piece 5, thereby increasing the diversity of the shape of the exposed edge of the welding piece 5, so as to adapt to welding pieces 5 of more shapes.

[0095] In some embodiments, the second welding track 200 includes two fifth sub-segments 550, the two fifth sub-segments 550 are extended in the same direction, and the two fifth sub-segments 550 are spaced apart in a direction perpendicular to the extension. The two fifth sub-segments 550 are in a straight line, and the two fifth sub-segments 550 are arranged side by side and spaced apart. Thus, the second welding track 200 includes two fifth sub-segments 550 extending in the same direction, which can simplify the complexity of the second welding track 200 and improve production efficiency. In addition, the second welding track 200 can cooperate with the first welding track 100 to expose the edge of the runway-shaped welding piece 5, which is convenient for welding the edge of the runway-shaped welding piece 5, thereby increasing the diversity of the shape of the exposed edge of the welding piece 5 to adapt to welding pieces 5 of more shapes.

[0096] To summarize, the pressure plate body 11 is used to press the welding part 5, and the pressure plate body 11 can make the welding part 5 fit tightly with other parts, which is convenient for welding the welding part 5 and improves the stability of welding. The pressure plate body 11 has a first welding track 100 and a second welding track 200. The first welding track 100 and the second welding track 200 can jointly expose the edge of the welding part 5, which is convenient for 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. The pressure plate body 11 can also cover the non-edge position of the end face of the welding part 5, which can reduce the risk of welding beads splashing to the end face of the welding part 5 during welding.

[0097] In order to solve the technical problems existing in the related embodiments, the present application also provides a welding system 20, see Fig.11 , Fig.11 is a schematic block diagram of a welding system 20 according to one or more embodiments.

[0098] 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 .

[0099] The welding device 30 can be a laser welding device 30, 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 welding platen 10, and the conveying device can convey the weldment 5 to the welding station, etc.

[0100] 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.12 , Fig.12 It is a schematic flow chart of a welding method according to one or more embodiments, specifically, it includes the following steps S1201 to S1204.

[0101] Step S1201: Press the end surface of the weldment by means of the pressing plate body, so that the first welding track exposes a portion of the edge of the weldment.

[0102] 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 11 is then covered on the end face at the corresponding position of the pole cover plate 2 at the welding station, so that the first welding track 100 reveals part of the edge of the welding part 5, and an external force pressing downward is applied to the pressure plate body 11, so that the pressure plate body 11 presses the end face of the welding part 5, and the pole cover plate 2 and the pole body 3 are tightly fitted, which is convenient for the subsequent welding of the pole cover plate 2.

[0103] Step S1202: welding a portion of the edge of the weldment exposed by the first welding track by a welding device to form a partial welding track.

[0104] 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, and the like. 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. Exemplarily, 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 pressure plate body 11 covers the end face at the corresponding position of the pole cover plate 2, so that the first welding track 100 exposes a portion of the edge of the weld 5, and the welding device 30 welds the portion of the edge of the weld 5 exposed by the first welding track 100, thereby forming a partial welding track.

[0105] Step S1203: Expose the remaining edge of the weldment through a second welding track.

[0106] After a partial welding track has been formed, since the remaining edges of the welding part 5 are blocked by the pressure plate body 11, the welding operation cannot be performed directly on the remaining edges of the welding part 5. At this time, the second welding track 200 can be made to expose the remaining edges of the welding part 5 by moving the pressure plate body 11, etc., to facilitate the subsequent welding of the remaining edges of the welding part 5.

[0107] Step S1204: welding the remaining edge of the weldment exposed by the second welding track by a welding device to form a closed welding track.

[0108] After the second welding track 200 reveals the remaining edge of the weld 5, the welding device 30 can continue to weld the exposed edge of the weld 5 and form the remaining welding track, wherein the remaining welding track can be connected end to end with the partial welding track formed above, thereby forming a welding track that is closed from beginning to end. Thus, the pressing plate body 11 presses the end face of the weld 5, and the pressing plate body 11 can make the weld 5 fit closely with other components, which is convenient for welding the weld 5 and improves the stability of welding. After the welding device 30 welds the exposed edge of the first welding track 100, the remaining edge of the weld 5 is exposed by the second welding track 200, and the welding device 30 continues to weld the remaining edge of the second welding track 200 to form a welding track that is closed from beginning to end, which can facilitate welding along the edge of the weld 5 while pressing the weld 5, thereby improving the reliability of welding and the convenience of the welding process. The pressing plate body 11 can also cover the non-edge position of the end face of the weld 5, which can alleviate the risk of welding beads splashing to the end face of the weld 5 during welding.

[0109] In some embodiments, the step of exposing the remaining edge of the weldment 5 through the second welding track 200 includes: adjusting the position of the pressure plate body 11 pressed on the end surface of the weldment 5 so that the second welding track 200 exposes the remaining edge of the weldment 5 . In this embodiment, the first welding track 100 and the second welding track 200 can be on a pressing plate body 11. When welding is required along the edge of the welding piece 5, the pressing plate body 11 can be pressed on the welding piece 5, and the first welding track 100 can be made to correspond to the partial edge position of the welding piece 5, so that the partial edge of the welding piece 5 is exposed through the first welding track 100, so as to facilitate the welding operation on the partial edge exposed by the first welding track 100. After the welding operation is performed on the partial edge of the welding piece 5, the pressing plate body 11 can be replaced and pressed on the position of the welding piece 5, and the second welding track 200 can be made to correspond to the remaining edge position of the welding piece 5, so that the remaining edge of the welding piece 5 is exposed through the second welding track 200, so as to facilitate the welding operation on the remaining edge exposed by the second welding track 200, thereby completing the operation of welding along the edge of the welding piece 5. Therefore, the remaining edge of the welding piece 5 can be exposed through the second welding track 200 only by adjusting the position of the pressing plate body 11, which can simplify the process of exposing the edge of the welding piece 5 during welding and improve welding efficiency.

[0110] In some embodiments, the pressure plate body 11 includes a first pressure plate 12 and a second pressure plate 13 which are separately arranged, the first welding track 100 is located on the first pressure plate 12, and the second welding track 200 is located on the second pressure plate 13; the step of pressing the end face of the welding part 5 through the pressure plate body 11 includes: pressing the end face of the welding part 5 through the first pressure plate 12; the step of exposing the remaining edge of the welding part 5 through the second welding track 200 includes: separating the first pressure plate 12 and the welding part 5; pressing the end face of the welding part 5 through the second pressure plate 13 to expose the remaining edge of the welding part 5 through the second welding track 200. The first pressing plate 12 and the second pressing plate 13 are two independent pressing plates. When welding is required along the edge of the welding piece 5, the first pressing plate 12 can be pressed on the welding piece 5, and the first welding track 100 can be made to correspond to the partial edge position of the welding piece 5, so that the partial edge of the welding piece 5 is exposed through the first welding track 100, which is convenient for the welding device 30 to perform welding operations on the partial edge exposed by the first welding track 100. After the welding operation is performed on the partial edge of the welding piece 5, the first pressing plate 12 can be separated from the welding piece 5, and then the end face of the welding piece 5 can be pressed by the second pressing plate 13, and the second welding track 200 can be made to correspond to the remaining edge position of the welding piece 5, so that the remaining edge of the welding piece 5 is exposed through the second welding track 200, which is convenient for the welding device 30 to perform welding operations on the remaining edge exposed by the second welding track 200, thereby completing the welding operation along the edge of the welding piece 5. Therefore, the first pressing plate 12 and the second pressing plate 13 are separately arranged, which can facilitate the formation of the first welding track 100 on the first pressing plate 12 and the formation of the second welding track 200 on the second pressing plate 13, thereby reducing the difficulty of forming the first welding track 100 and the second welding track 200 and improving production efficiency. The first welding track 100 and the second welding track 200 are respectively located on the first pressing plate 12 and the second pressing plate 13. By pressing the welding piece 5 with the first pressing plate 12 and the second pressing plate 13 respectively, the edge position of the welding piece 5 exposed by the first welding track 100 and the second welding track 200 can be switched more quickly, thereby improving welding efficiency.

[0111] Further, the step of pressing the end face of the weldment 5 by the first pressing plate 12 includes: placing the weldment 5 at the first welding station; at the first welding station, pressing the end face of the weldment 5 by the first pressing plate 12. The step of pressing the end face of the weldment 5 by the second pressing plate 13 includes: placing the weldment 5 at the second welding station; at the second welding station, pressing the end face of the weldment 5 by the second pressing plate 13. The first welding station is different from the second welding station. In some practical application scenarios, the first welding station may be located at the upstream station of the second welding station. For example, when the welding operation needs to be performed on the weldment 5, the weldment 5 may be first transported to the first welding station, and then the end face of the weldment 5 is pressed by the first pressing plate 12, and after a partial welding track is formed by the welding device 30, the first pressing plate 12 and the weldment 5 are separated, and the weldment 5 is continued to be transported to the second welding station, and then the end face of the weldment 5 is pressed by the second pressing plate 13, and the exposed edge of the second welding track 200 is welded by the welding device 30, so as to form a welding track closed from beginning to end. Therefore, by pressing the end face of the weldment 5 by the first pressing plate 12 at the first welding station and by pressing the end face of the weldment 5 by the second pressing plate 13 at the second welding station, the risk of interference between the first pressing plate 12 and the second pressing plate 13 in pressing the weldment 5 can be alleviated, and the corresponding welding operation is performed at a specific station, which can further improve the welding efficiency of welding the weldment 5.

[0112] 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 pressure plate includes a pressure plate body for pressing the welding part, the pressure plate body is provided with a first welding track and a second welding track, the first welding track and the second welding track are spaced apart, the first welding track and the second welding track respectively pass through the opposite side surfaces of the pressure plate body, the pressure plate body is covered on the end face of the welding part, the first welding track is used to expose part of the edge of the welding part, and the second welding track is used to expose the remaining edge of the welding part.

2. The welding plate according to claim 1, characterized in that: The pressing plate body includes a first pressing plate and a second pressing plate which are separately arranged. The first pressing plate and the second pressing plate are respectively used to press the welding piece. The first welding track is located on the first pressing plate, and the second welding track is located on the second pressing plate.

3. The welding plate according to claim 1 or 2, characterized in that: The number of the first welding tracks and the number of the second welding tracks are both at least two, and there is a gap between at least two of the first welding tracks and between at least two of the second welding tracks. One first welding track corresponds to one second welding track, and the welding pressure plate cover is provided on at least two end faces of the welding parts. One first welding track is used to expose a partial edge of the welding part, and one second welding track corresponding to the first welding track is used to expose the remaining edge of the welding part.

4. The welding plate according to any one of claims 1 to 3, characterized in that: The opening area of ​​the first welding track on the side of the pressing plate body away from the welding piece is larger than the opening area of ​​the first welding track on the side of the pressing plate body toward the welding piece; And / or, an opening area of ​​the second welding track on a side of the pressing plate body away from the welding piece is larger than an opening area of ​​the second welding track on a side of the pressing plate body toward the welding piece.

5. The welding plate according to claim 4, characterized in that: The opening area of ​​the first welding track gradually decreases from the side of the pressing plate body away from the welding part to the side of the pressing plate body toward the welding part; And / or, the opening area of ​​the second welding track gradually decreases from the side of the pressing plate body away from the welding part to the side of the pressing plate body facing the welding part.

6. The welding plate according to any one of claims 1 to 5, characterized in that: The first welding track includes a first track segment, and the second welding track includes a second track segment. Both the first track segment and the second track segment are arc-shaped.

7. The welding plate according to claim 6, characterized in that: The first welding track further includes two third track segments, two ends of the first track segment are respectively connected to one end of one of the third track segments and one end of another of the third track segments, and the other ends of the two third track segments extend away from the first track segment in the same direction; And / or, the second welding track includes two fourth track segments, both ends of the second track segment are respectively connected to one end of one fourth track segment and one end of another fourth track segment, and the other ends of the two fourth track segments extend away from the second track segment in the same direction.

8. The welding plate according to claim 6, characterized in that: The pressing plate body is further provided with a first welding hole, and the first welding hole penetrates the two opposite surfaces of the pressing plate body; The first welding hole is opposite to the first track segment and is arranged at an interval, and the first welding hole is used to expose a portion of the edge of the remaining portion; And / or, the first welding hole is opposite to the second track segment and is arranged at an interval, and the first welding hole is used to expose a portion of the edge of the portion.

9. The welding plate according to any one of claims 1 to 5, characterized in that: The first welding track includes a fifth track segment and two sixth track segments, the two sixth track segments are arc-shaped, the inner arc sides of the two sixth track segments are arranged opposite to each other, and in the two sixth track segments, two opposite ends of one are respectively connected to two ends of the fifth track segment, and the other two opposite ends are arranged at intervals; And / or, the second welding track includes a seventh track segment and two eighth track segments, the two eighth track segments are arc-shaped, the inner arc sides of the two eighth track segments are arranged opposite to each other, the two opposite ends of the two eighth track segments are respectively connected to the two ends of the seventh track segment, and the other two opposite ends are arranged at intervals.

10. The welding plate according to claim 9, characterized in that: The pressing plate body is further provided with a second welding hole, and the second welding hole penetrates the two opposite surfaces of the pressing plate body; The second welding hole is located between two ends of the sixth track segments that are spaced apart from each other, and the second welding hole is used to expose a portion of the edge of the remaining portion; And / or, the second welding hole is located between two ends of the eighth track segments that are spaced apart from each other, and the second welding hole is used to expose part of the edge of the portion.

11. The welding plate according to any one of claims 1 to 5, characterized in that: The first welding track includes a first sub-segment and a second sub-segment. The first sub-segment and the second sub-segment are both arc-shaped. The inner arc sides of the first sub-segment and the second sub-segment are opposite and spaced apart.

12. The welding plate according to claim 11, characterized in that: The first welding track also includes two third sub-segments and two fourth sub-segments, the two ends of the first sub-segment are respectively connected to one end of one of the third sub-segments and one end of another of the third sub-segments, the other ends of the two third sub-segments are extended toward the second sub-segment, the two ends of the second sub-segment are respectively connected to one end of one of the fourth sub-segments and one end of another of the fourth sub-segments, the other ends of the two fourth sub-segments are extended toward the first sub-segment, and the other end of one of the third sub-segments is opposite to and spaced from one of the fourth sub-segments.

13. The welding pressure plate according to claim 11 or 12, characterized in that: The second welding track includes two fifth sub-segments, the two fifth sub-segments are extended in the same direction, and the two fifth sub-segments are spaced apart in a direction perpendicular to the extension.

14. 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 13, 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.

15. A welding method, characterized in that: The welding method is applied to the welding system according to claim 14, and the welding method comprises: The end surface of the welding part is pressed by the pressing plate body so that the first welding track exposes a part of the edge of the welding part; Welding the portion of the edge of the welding piece exposed by the first welding track by the welding device to form a partial welding track; Exposing the remaining edge of the weldment through the second welding track; The remaining edge of the welded part exposed by the second welding track is welded by the welding device to form a welding track that is closed from beginning to end.

16. The welding method according to claim 15, characterized in that: The step of exposing the remaining edge of the welded part through the second welding track comprises: The position of the pressing plate body pressed on the end surface of the welding piece is adjusted so that the second welding track reveals the remaining edge of the welding piece.

17. The welding method according to claim 15 or 16, characterized in that: The pressing plate body comprises a first pressing plate and a second pressing plate which are separately arranged, the first welding track is located on the first pressing plate, and the second welding track is located on the second pressing plate; The step of pressing the end surface of the welding part by the pressing plate body comprises: Pressing the end surface of the welding piece by the first pressing plate; The step of exposing the remaining edge of the welded part through the second welding track comprises: separating the first pressing plate and the welding piece; The end surface of the welding piece is pressed by the second pressing plate to expose the remaining edge of the welding piece through the second welding track.

18. The welding method according to claim 17, characterized in that: The step of pressing the end surface of the welding part by the first pressing plate comprises: Placing the weldment at a first welding station; At the first welding station, pressing the end surface of the weldment by the first pressing plate; The step of pressing the end surface of the weldment by the second pressing plate comprises: Placing the welded part at a second welding station; At the second welding station, the end surface of the weldment is pressed by the second pressing plate.

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