Welding device, battery production line and control method

Abstract

The invention provides a welding device, a battery production line and a control method, and the welding device comprises a pressing part which comprises at least two sub-pressing parts which are arranged along a first direction and are respectively provided with a pressing head; each sub-pressing piece is connected to the corresponding downward pressing mechanism and is driven by the corresponding downward pressing mechanism to press downwards, so that the pressing head abuts against a to-be-welded structure of the battery. Compared with the prior art, each sub-pressing piece is provided with an independent pressing mechanism, and the pressing mechanisms can drive the sub-pressing pieces to apply pressure to different to-be-welded structures of the battery, so that the to-be-welded structures can be effectively pressed, the situation that the to-be-welded structures cannot be pressed due to height deviation is effectively avoided, and the battery welding quality is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and particularly to a welding device for battery welding, a battery production line, and a control method. Background Art

[0002] In the existing battery manufacturing process, it is necessary to electrically connect the electrode terminals of battery monomers to the bus bar through a welding process. During the welding process, there is a technical problem that the structures to be welded are not tightly fitted together, with gaps, which affects the welding quality. Summary of the Invention

[0003] In view of the above problems, the present application provides a welding device for solving the technical problems that the structures to be welded are not tightly fitted together, affecting the welding quality.

[0004] To achieve the above object, the present application provides a welding device for battery welding, including:

[0005] A pressing member, including at least two sub-pressing members, the sub-pressing members are arranged in a first direction and each has a pressing head;

[0006] At least two downward pressing mechanisms;

[0007] Each sub-pressing member is respectively connected to a corresponding downward pressing mechanism and is driven downward by the corresponding downward pressing mechanism so that the pressing head abuts against the structure to be welded of the battery.

[0008] Further, the downward pressing mechanism includes:

[0009] A mounting plate;

[0010] A driving member, arranged on the mounting plate and movable relative to the mounting plate in a second direction perpendicular to the first direction, and the sub-pressing member is arranged on the driving member;

[0011] A downward pressing device, mounted on the mounting plate and having a movable end connected to the driving member, for driving the driving member to press downward in the second direction.

[0012] Further, it further includes:

[0013] A first guide rail, arranged in the first direction;

[0014] Each downward pressing mechanism is movably arranged on the first guide rail, and the mounting plate is provided with a sliding connection structure adapted to the first guide rail.

[0015] Further, the sliding connection structure includes a positioning mechanism and / or a locking mechanism, and the positioning mechanism is used to position the sliding connection structure on the first guide rail;

[0016] The locking mechanism is used to lock the position of the sliding connection structure on the first guide rail.

[0017] Furthermore, the driving member includes:

[0018] A first plate body, parallel to the mounting plate and slidably connected to the mounting plate via a second guide rail;

[0019] The second plate body is arranged at the bottom of the first plate body and forms an L-shaped structure or a T-shaped structure with the first plate body. The sub-pressing member is installed on the second plate body.

[0020] Furthermore, the pressing mechanism includes at least two pressing components, and the at least two pressing components are arranged at intervals along the first direction.

[0021] Furthermore, the sub-pressure member is detachably connected to the driving member, and the driving member is provided with a locking mechanism for locking the sub-pressure member, and the locking mechanism includes: any one of an inflatable locking mechanism, an electromagnetic locking mechanism, a motor-driven locking mechanism, and a manual locking mechanism.

[0022] Furthermore, the sub-pressing member is a plate-like structure, and is provided with a first through hole penetrating the upper and lower surfaces of the sub-pressing member. A second through hole aligned with the first through hole is provided in the middle of the pressing head, and the second through hole penetrates the upper and lower surfaces of the pressing head.

[0023] Furthermore, the pressing mechanism further comprises:

[0024] The protection plate is located at a side of the sub-pressing member away from the pressing head and is arranged around the area where the first through hole is located.

[0025] Further, a plurality of pressing heads are distributed along a straight line on the sub-pressing member;

[0026] The protection plate is a rectangular frame arranged around a plurality of first through holes.

[0027] Furthermore, the pressure head is provided with a dust suction channel, which is connected to the second through hole and is used to remove particulate matter formed by welding.

[0028] Furthermore, the sub-pressing member and the pressing head are movably connected, and an elastic member is provided between the sub-pressing member and the pressing head, and the elastic member is used to apply the elastic force of the back-ion pressing member to the pressing head.

[0029] In order to solve the above technical problems, this application also provides another technical solution:

[0030] A battery production line, comprising:

[0031] A wire body, used to carry the battery; and

[0032] As in any of the above technical solutions, the welding device is arranged on the side of the wire body.

[0033] This application also provides another technical solution:

[0034] A control method for a welding device, the control method comprising:

[0035] Controlling at least two pressing mechanisms to drive corresponding sub-pressing members to press down, so that the pressing heads on the sub-pressing members abut against the structure to be welded of the battery, wherein the sub-pressing members are arranged in a first direction and are respectively provided with the pressing heads;

[0036] Controlling a welding device to weld the structure to be welded.

[0037] Different from the prior art, in the welding device of the present application, the pressing member includes at least two sub-pressing members, each sub-pressing member is provided with a pressing head and is connected to an independent pressing mechanism, and can be driven by the pressing mechanism to apply pressure to different structures to be welded of the battery, so that each structure to be welded can be effectively pressed, effectively avoiding the situation of insecure welding caused by the height deviation of the structures to be welded, thereby greatly improving the welding quality of the battery.

[0038] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically gives the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0040] Figure 1 is the front view of the welding device provided by an embodiment of the present application;

[0041] Figure 2 is the top view of the welding device provided by an embodiment of the present application;

[0042] Figure 3 is the three-dimensional structure diagram of the sub-module of the welding device provided by an embodiment of the present application;

[0043] Figure 4 is the three-dimensional structure diagram of the sub-module of the welding device provided by an embodiment of the present application when a protection plate is installed;

[0044] Figure 5 is Figure 1 the partial enlarged view of part A in

[0045] Figure 6It is a flowchart of a control method for a welding device provided by an embodiment of the present application.

[0046] 100. Welding device; 1. Pressing mechanism; 11. Mounting plate; 111. Second guide rail; 12. Driving member; 121. Pressing device; 122. Locking mechanism; 1201. First plate body; 1202. Second plate body;

[0047] 2. First guide rail;

[0048] 3. Pressing member; 31. Sub-pressing member; 311. First through hole; 32. Pressing head; 321. Second through hole; 322. Dust suction channel; 323. Elastic member; Detailed implementation manners

[0049] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0050] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0052] In addition, the technical terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.

[0053] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. 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 specific situations.

[0054] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0055] In the related art, during battery welding, in order to ensure the welding quality, it is necessary to apply pressure to the welding structures such as electrode terminals and busbars through a pressing plate so that the busbar and the welding structures such as electrode terminals are fitted together, and then laser welding is performed. During operation, it is usually necessary to apply pressure to multiple structures to be welded through a single pressing plate. When the size of the pressing plate is large or the number of structures to be welded is large, the pressing plate cannot apply uniform pressure to each structure to be welded.

[0056] In view of the above problems, the present application provides a welding device, a battery production line and a control method, which are used to solve the technical problem that local structures to be welded cannot be effectively pressed and fitted during battery welding. The welding device can be applied to welding two or more structures in a battery to connect two or more structures together. Two or more structures in the battery can be any structures in the battery that need to be electrically connected or fixed by welding. For example, the above structures are busbars and electrode terminals, or a battery case and an upper cover, etc. The welding device is used in cooperation with a welding device during use. The welding device presses and fits two structures to be welded in the battery together, and then the two structures are welded and fixed by the welding device. The welding device is provided with a plurality of sub-pressing members, each sub-pressing member is provided with a pressing head and is provided with an independent downward pressing mechanism. Each sub-pressing member is driven to press down by the corresponding downward pressing mechanism. Therefore, through the sub-pressing members and the downward pressing mechanism, pressure can be applied to multiple structures to be welded in the battery respectively, thereby effectively avoiding the technical problem of inability to press and fit due to the height deviation of the structures to be welded and improving the battery welding quality.

[0057] The welding equipment can be laser welding equipment, ultrasonic welding equipment or other welding equipment, which is not limited in this application. The welding device can be used for welding various batteries, such as battery modules and battery packs, or primary batteries and secondary batteries. For example, secondary batteries include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead storage) batteries, lithium-ion batteries, sodium-ion batteries, polymer batteries, etc. Such batteries are applicable to various electrical equipment using batteries, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, electric vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.; the batteries are used to provide electrical energy for the above-mentioned electrical equipment.

[0058] It should be understood that the technical solutions described in the embodiments of this application are not limited to the batteries and welding equipment described above.

[0059] Please refer to Figure 1 and Figure 2 , Figure 1 which is the front view of the welding device provided by some embodiments of this application; Figure 2 which is the side view of the welding device provided by the embodiment of this application.

[0060] The welding device 100 in the embodiment of this application is used for battery welding. The welding device 100 includes:

[0061] A pressing member 3, including at least two sub-pressing members 31, the sub-pressing members 31 are arranged along a first direction and each has a pressing head 32;

[0062] At least two downward pressing mechanisms 1;

[0063] Wherein, each sub-pressing member 31 is respectively connected to a corresponding downward pressing mechanism 1 and is driven by the corresponding downward pressing mechanism 1 to press downward, so that the pressing head 23 abuts against the structure to be welded of the battery.

[0064] As Figure 1 shown, wherein the direction indicated by the arrow X is the first direction, the battery to be welded is placed below the sub-pressing member 31, and the structures to be welded on the battery are distributed along the first direction. The sub-pressing member 31 is driven by the downward pressing mechanism 1 to press downward in the direction indicated by the arrow Z towards the battery, so that the structures to be welded on the battery are fitted together.

[0065] A plurality of sub-pressing members 31 are arranged close to each other along the first direction indicated by the arrow X, so as to form a pressing member 3 with a larger size. Therefore, more structures to be welded on the battery can be pressed by the pressing member 3. After each sub-pressing member 31 presses down each structure to be welded tightly, the battery can be welded by laser welding equipment. Among them, the number of sub-pressing members 31 can be two, three, four or more, and the number of sub-pressing members 31 can be increased or decreased adaptively according to the number and distribution range of the structures to be welded in the battery.

[0066] Among them, the pressing mechanism 1 is used to provide the driving force for pressing down the sub-pressing member 31, and drive the sub-pressing member 31 to move to the initial position (i.e., the position when the sub-pressing member 31 is not pressed down) after pressing down.

[0067] When welding the battery, each sub-pressing member 31 can be driven by the corresponding pressing mechanism to move in the direction of the battery (usually downward), so that the pressing head 32 on the sub-pressing member 31 presses two parts or structures to be welded in the battery, making the two fit together, and finally laser welding these two structures or parts through a laser welding device.

[0068] Schematically, the battery includes a box body and a plurality of battery cells arranged in the box body. The positive electrode terminals of each battery cell need to be welded to the positive bus bar, and the negative electrode terminals of each battery cell need to be welded to the negative bus bar. When welding, first press the positive electrode terminal of the battery and the positive bus bar tightly through each sub-pressing member 31, and then laser weld the positive electrode terminal and the positive bus bar through a laser welding device.

[0069] It should be noted that in this embodiment, the pressing member 3 does not refer to a whole structural member (such as a whole plate-shaped structural member), but has the same function as the whole pressing plate in terms of function, and both include a plurality of pressing heads 32, and can be pressed down and applied to a plurality of structures to be welded through the pressing heads for welding. The difference between the pressing member 3 and the whole pressing plate is that in this embodiment, each sub-pressing member 31 in the pressing member 3 can be independently pressed down, rather than necessarily all sub-pressing members 31 being pressed down or all sub-pressing members 31 being pressed down simultaneously. That is, for the pressing plate of the integral structure, the pressing heads are installed on the same plate, so all the pressing heads can only be pressed down simultaneously; while in this embodiment, each sub-pressing member 31 is provided with a pressing head 32, and it can be selected that all sub-pressing members 31 are pressed down simultaneously, or a part of the sub-pressing members 31 are pressed down first and another part of the sub-pressing members 31 are pressed down later, or it can be selected that all sub-pressing members 31 are pressed down, or only a part of the sub-pressing members 31 are pressed down according to needs, and the other part of the sub-pressing members 31 are not pressed down.

[0070] Among them, the sub-pressing member 31 can be a plate-shaped structural member (i.e., a sub-pressing plate), or a block-shaped structural member, a strip-shaped structural member, or a frame-shaped structural member formed by connecting at least two connecting rods. Preferably, the sub-pressing member 31 is a plate-shaped structural member, and the pressing head 32 is arranged on the lower surface of the sub-pressing member.

[0071] The fact that the sub-pressing members 31 are respectively connected to the corresponding downward pressing mechanisms 1 means that the number of the sub-pressing members 31 corresponds one-to-one to the number of the downward pressing mechanisms 1, that is, each sub-pressing member 31 is connected to one downward pressing mechanism 1 and is driven by the downward pressing mechanism 1 to press downward. For example, the welding device 100 includes a first sub-pressing member to a fourth sub-pressing member and a first downward pressing mechanism to a fourth downward pressing mechanism. Among them, the first downward pressing mechanism corresponds to the first sub-pressing member, and the first downward pressing mechanism is used to drive the first sub-pressing member to press downward; and so on, the second downward pressing mechanism corresponds to the second sub-pressing member, and the third downward pressing mechanism corresponds to the third sub-pressing member.

[0072] In this embodiment, the pressing member 3 includes a plurality of sub-pressing members 31, and each sub-pressing member 31 is provided with an independent downward pressing mechanism 1, and can be driven by the downward pressing mechanism 1 to press on different structures to be welded of the battery, so that each structure to be welded can be effectively pressed, effectively avoiding the situation of being unable to be pressed due to the height deviation of the structures to be welded, thereby avoiding the situation that the battery structures to be welded are not firmly welded, and greatly improving the welding quality of the battery.

[0073] And in this embodiment, the pressing member 3 is composed of a plurality of sub-pressing members 31, so a pressing member with a larger size or length can be formed. Therefore, the welding efficiency can be improved by this welding device. For example, in some cases, through the pressing member 3, the electrode terminals and the bus bars on each battery cell in the entire battery box can be pressed at one time, and then the electrode terminals can be welded at one time. Therefore, compared with welding in batches, this embodiment can effectively improve the welding efficiency.

[0074] As Figure 1 and Figure 2 shown, the welding device further includes a first guide rail 2. The first guide rail 2 is arranged along the first direction; each downward pressing mechanism 1 is movably arranged on the upper guide rail of the first guide rail 2. The downward pressing mechanism 1 and the corresponding sub-pressing member 31 form an independently downward pressing sub-module, and each sub-module is movably arranged on the first guide rail 2.

[0075] Each downward pressing mechanism 1 is movably arranged on the first guide rail 2, and the distance between the downward pressing mechanisms 1 can be adjusted as needed during welding, so as to adjust the distance between the sub-pressing members 31. For example, in some embodiments, the distance between the electrode terminals to be welded is large, and at this time, the distance between the downward pressing mechanisms 1 on the first guide rail 2 can be appropriately increased. And the sub-pressing member 31 and the downward pressing mechanism 1 are detachably connected, and various sub-pressing members 31 can be set according to the welding needs. The number, distance, and size of the pressing heads 32 on various sub-pressing members 31 can be appropriately adjusted according to specific situations such as the downward pressure and the distance between the structures to be welded.

[0076] As Figure 3As shown in the figure, it is a three-dimensional structural schematic diagram of a sub-module that can be independently pressed down, which is composed of each pressing mechanism 1 and the corresponding sub-pressing member 31 in an embodiment. Among them, the pressing mechanism 1 includes: a mounting plate 11, a driving member 12, and a pressing device 121.

[0077] The driving member 12 is arranged on the mounting plate and can move relative to the mounting plate along a second direction, the second direction is perpendicular to the first direction, and the sub-pressing member 31 is arranged on the driving member 12. The pressing device 121 is mounted on the mounting plate and its movable end is connected to the driving member 12, and is used to drive the driving member 12 to press down along the second direction.

[0078] Among them, the driving member 12 and the pressing device 121 are arranged on the mounting plate 11, and the mounting plate 11 is provided with a sliding connection structure adapted to the first guide rail 2. The pressing device 121 includes any one of a cylinder, an oil cylinder, and a linear motor.

[0079] The mounting plate 11 can be a plate-shaped structural member with two parallel surfaces. The specific structure of the mounting plate 11 is not limited to the plate-shaped structure. The mounting plate 11 can also be other-shaped structural members that are functionally similar to the plate-shaped structural member and can be used to mount the driving member 12 and the pressing device 121, such as a mounting frame, a base, a mounting seat, etc. The mounting plate 11 is provided with a sliding connection structure adapted to the first guide rail 2. The sliding connection structure includes a slider, and the slider is slidably matched with the first guide rail 2. Therefore, by adjusting the position of the slider on the first guide rail 2, the position of the pressing mechanism 1 and the sub-pressing member 31 on the first guide rail 2 can be adjusted. Among them, the sliding connection structure can be connected to a driving motor through a transmission structure such as a gear transmission structure, a belt transmission structure, a screw rod transmission structure, a chain transmission structure, etc., and the driving motor drives the slider to move on the first guide rail 2. For example, the slider is connected to the driving motor by a screw rod transmission structure. The screw rod transmission structure includes a screw rod. The slider is provided with a threaded hole that cooperates with the screw rod. The screw rod is connected to the driving motor. By driving the screw rod to rotate by the driving motor and the threaded cooperation between the screw rod and the slider, the sub-pressing member 31 located on the slider moves on the first guide rail 2. The present application does not limit the driving structure of the slider on the first guide rail 2. In some embodiments, the position of the slider on the first guide rail 2 can also be adjusted manually.

[0080] The driving member 12 is used to transfer the downward pressure generated by the pressing device 121 to the sub-pressing member 31. The driving member 12 is slidably connected to the mounting plate 11 through the second guide rail 111. The fixed end of the pressing device 121 is mounted on the mounting plate 11, and the movable end of the pressing device 121 is connected to the driving member 12. Therefore, by the telescopic movement of the pressing device 121, the driving member 12 and the sub-pressing member 31 thereon can be driven to press down.

[0081] In some embodiments, in order to precisely adjust the position of the pressing mechanism 1 on the first guide rail 2 and prevent the position of the pressing mechanism 1 from shifting after adjustment, the sliding connection structure includes a positioning mechanism and / or a locking mechanism. Among them, the positioning mechanism is used to position the sliding connection structure on the first guide rail 2, that is, the sliding connection structure can be accurately moved to a predetermined position on the first guide rail 2 through the positioning mechanism. In one embodiment, the positioning mechanism may include positioning holes arranged at equal intervals along the first guide rail 2 and elastic columns adapted to the positioning holes. The elastic columns are installed on the mounting plate 11 and can move with the mounting plate 11. When the mounting plate 11 is moved along the first guide rail 2, when the elastic column aligns with the positioning hole, the end of the elastic column can extend into the positioning hole to achieve positioning. The positioning mechanism can also be an electronic positioning mechanism. The electronic positioning mechanism includes a grating positioning mechanism arranged along the first guide rail 2, or a coding wheel positioning mechanism that rotates as the mounting plate 11 moves, etc. The present application does not limit the positioning mechanism. The locking mechanism is used to lock the position of the sliding connection structure on the first guide rail. The locking mechanism can be any one of an air inflation type locking mechanism, an electromagnetic type locking mechanism, a motor-driven locking mechanism, and a manual locking mechanism. The present application does not limit this.

[0082] The air inflation type locking mechanism includes an airbag that can be inflated and expanded, and a locking block driven by the airbag. When the airbag expands, the locking block extends into the locking hole to lock, so that the mounting plate 11 cannot slide, and vice versa for unlocking. The electromagnetic type locking mechanism includes an electromagnetic coil. After the electromagnetic coil is energized, it generates a magnetic force to lock the mounting plate 11. The motor-driven locking mechanism includes a motor. The rotation of the motor drives the locking block into the locking hole to lock, and vice versa for unlocking.

[0083] The driving member 12 can be a plate-shaped member or formed by connecting two or more plate-shaped members, or the driving member 12 can also be a rod-shaped member or formed by connecting two or more rod-shaped members, or formed by combining a rod-shaped member and a plate-shaped member. As Figure 3 shown, in one embodiment, the driving member 12 includes: a first plate body 1201 and a second plate body 1202. The first plate body 1201 is parallel to the mounting plate 11 and is slidably connected to the mounting plate through a second guide rail 111; the second plate body 1202 is arranged at the bottom of the first plate body 1201 and forms an L-shaped structure with the first plate body 1201. The sub-pressing member 31 is installed on the second plate body.

[0084] The first plate body 1201 and the second plate body 1202 can be fixedly connected together by welding, bolt connection, etc. In some embodiments, the first plate body 1201 and the second plate body 1202 can also be an integrally formed structure obtained by an integral forming process such as die casting and casting.

[0085] In this embodiment, the L-shaped driving member 12 can ensure a stable sliding connection with the mounting plate 11. At the same time, the second plate body 1202 and the sub-pressing member 31 have a large-area overlapping connection surface, so that the downward pressure of the downward pressing member 121 can be effectively transmitted to the sub-pressing member 31.

[0086] The above-mentioned first plate body 1201 and second plate body 1202 are not limited to the L-shaped structure. In some embodiments, the first plate body 1201 and the second plate body 1202 can also form a T-shaped structure, that is, the middle parts of the first plate body 1201 and the second plate body 1202 are fixedly connected.

[0087] In some embodiments, a right-angled reinforcing plate is also provided at the connection between the first plate body 1201 and the second plate body 1202. One right-angled side of the reinforcing plate is connected to the first plate body 1201, and the other right-angled side of the reinforcing plate is connected to the second plate body 1202.

[0088] Such as Figure 3 As shown, in one embodiment, in order to enable the sub-pressing member 31 to obtain sufficient downward pressure and the downward pressure can be evenly applied to the sub-pressing member 31, the downward pressing mechanism 1 includes more than two downward pressing members 121, and the more than two downward pressing members 121 are arranged at intervals in the first direction.

[0089] Illustratively, the downward pressing mechanism 1 includes two downward pressing members 121, and the downward pressing members 121 are downward pressing cylinders, and the downward pressing cylinders are arranged at intervals along the length direction of the sub-pressing member 31 (i.e., the direction indicated by the arrow X).

[0090] Such as Figure 3 As shown, in one embodiment, the sub-pressing member 31 is detachably connected to the driving member 12, and the driving member 12 is provided with a locking mechanism 122 for locking the sub-pressing member 31. The locking mechanism 122 includes any one of an air-expansion type locking mechanism, an electromagnetic type locking mechanism, a motor-driven type locking mechanism, and a manual type locking mechanism, and the present application does not limit this. The specific structures of the air-expansion type locking mechanism, the electromagnetic type locking mechanism, and the motor-driven type locking mechanism have been specifically described in the above embodiments and will not be elaborated here. It should be noted that the locking mechanism and the locking mechanism provided on the slider in the above embodiments are named from the perspective of function or use, rather than referring to the difference in specific structure. The locking mechanism and the locking mechanism can both be of air-expansion type, electromagnetic type, etc. structures, that is, their structures can be the same. Among them, locking means fixing two separable structural members together. For example, screwing a nut onto a bolt to fix the nut to the bolt, that is, the nut is locked to the bolt; while locking means fixing a movable structural member so that it cannot move, for example, locking a slider to a guide rail or locking a turntable so that it cannot rotate.

[0091] Schematically, the pressing mechanism 1 is provided with two locking mechanisms 122, and the two locking mechanisms 122 can be arranged at intervals along the length direction of the sub-pressing member 31. Specifically, the locking mechanism 122 can be arranged on the outer side of the pressing device 121. One locking mechanism 122 locks one end of the sub-pressing member 31 in the length direction, and the other locking mechanism 122 locks the other end of the sub-pressing member 31 in the length direction. Of course, the number of the locking mechanisms 122 can also be one, three, four, etc., and the specific number of the locking mechanisms 122 can be increased or decreased according to the size of the sub-pressing member 31 and the requirement of the locking strength.

[0092] As Figure 4 shown, in an embodiment, the pressing mechanism 1 further includes: a protective plate 312. The protective plate 312 is located on the side of the sub-pressing member 31 away from the pressing head and is arranged around the area where the first through hole is located. The protective plate 312 is used to prevent the particulate matter formed during the welding process from spreading outward. Since the protective plate 312 has a certain height, it is difficult for the particulate matter to spread outward across the protective plate 312.

[0093] In an embodiment, a plurality of pressing heads 32 are linearly distributed on the sub-pressing member 31; the protective plate 312 is a rectangular frame arranged around a plurality of first through holes 311.

[0094] As Figure 4 shown, in an embodiment, the pressing head is provided with a dust suction channel 322, and the dust suction channel 322 is communicated with the second through hole 321 for sucking the particulate matter formed by welding.

[0095] The dust suction channel 322 is connected to a negative pressure pipeline, and the particulate matter is sucked by the suction force generated by the negative pressure pipeline. Schematically, the dust suction channels 322 on each sub-pressing member 31 are first connected to a dust suction main pipe, and then the dust suction main pipe is connected to the negative pressure pipeline. In this embodiment, by using the dust suction channel 322 and the protective plate 312 in combination, the particulate matter generated by welding can be effectively sucked and prevented from spreading outward.

[0096] As Figure 3 and Figure 4 shown, in an embodiment, to enable the welding device to be adapted to a laser welding device for welding operations, the sub-pressing member 31 is provided with a first through hole 311 penetrating the upper surface and the lower surface of the sub-pressing member 31, and a second through hole 321 aligned with the first through hole 311 is provided in the middle of the pressing head 32, and the second through hole 321 penetrates the upper surface and the lower surface of the pressing head.

[0097] Among them, the shape of the first through hole 311 can be a circular hole, a square hole, a triangular hole, etc. The indenter 32 is arranged below the first through hole 311. When the sub-pressing member 31 presses down, only the indenter 32 can contact the structure to be welded of the battery, while the sub-pressing member 31 does not contact the structure to be welded of the battery. When performing laser welding, the laser passes through the first through hole 311 and the second through hole 321 in the middle of the indenter 32 in sequence, and irradiates on the structure of the bus bar waiting to be welded, so as to perform laser welding on the structure to be welded.

[0098] As Figure 5 shown, the sub-pressing member 31 and the indenter 32 are movably connected, and an elastic member 323 is arranged between the sub-pressing member 31 and the indenter 32. The elastic member 323 is used to apply an elastic force away from the sub-pressing member to the indenter.

[0099] Among them, the sub-pressing member 31 and the indenter 32 are movably connected through a connecting rod. One indenter 32 can be movably connected to the sub-pressing member 31 through more than two connecting rods. Schematically, the four corners of each indenter 32 are respectively connected to the sub-pressing member 31 through a connecting rod, and the indenter 32 and the sub-pressing member 31 are relatively movable in the thickness direction of the sub-pressing member 31, and are not fixedly immovable. The indenter 32 is pressed down by the elastic force of the elastic member 323.

[0100] In this embodiment, during the process of the sub-pressing member 31 pressing on the battery, since the indenter 32 is movable and the elastic force for pressing down is provided by the elastic member 323, when there are height deviations in the structures to be welded on the battery, sufficient downward pressure can be applied to the corresponding structures to be welded by each indenter 32.

[0101] In another embodiment, a battery production line is provided. The battery production line includes a line body and the welding device 100 as described above, wherein the line body is used to carry the battery, and the welding device 100 is used to weld the structures in the battery module.

[0102] The line body refers to a device arranged along the battery production line for carrying the battery or accessories during the production process. Conveying mechanisms such as a conveyor belt, a driving roller, a transfer bracket, a hoisting device, etc. for carrying and transferring the battery or accessories can be arranged on the line body. The battery or accessories during the production process can move from one production station to the next production station on the line body, so as to realize efficient streamlined production operations.

[0103] In this battery production line, applying the welding device 100 provided by the embodiment of the present application to produce the battery module can simultaneously apply pressure to the structures to be welded of multiple batteries in the battery module, so that each structure to be welded can be effectively pressed, effectively avoiding the situation of being unable to be pressed due to the height deviation of the structures to be welded, thereby greatly improving the battery welding quality.

[0104] In another embodiment, a control method for a welding device is provided, which is applied to a control device for controlling

[0105] The specific type of the device is not limited, such as a PLC (Programmable Logic Controller) device, an industrial control computer, etc. As Figure 6 shown, the control method includes:

[0106] S01. Control at least two pressing mechanisms 1 to drive the corresponding sub-pressing members 31 to press down, so that the pressing heads 32 on the sub-pressing members 31 are abutted against the structure to be welded of the battery. Among them, the sub-pressing members 31 are arranged in a first direction and are respectively provided with pressing heads 32;

[0107] S02. Control the welding device to weld the structure to be welded.

[0108] The welding device can be a laser welding device, an ultrasonic welding device or other welding devices, and the present application does not limit this.

[0109] Each sub-pressing member 31 is provided with an independent pressing mechanism 1 and can be driven by the pressing mechanism 1 to press on different structures to be welded of the battery, so that each structure to be welded can be effectively pressed, effectively avoiding the situation of being unable to be pressed due to the height deviation of the structure to be welded, thus avoiding the situation that the structure to be welded of the battery is not firmly welded, and greatly improving the welding quality of the battery.

[0110] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; 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 covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A welding device for battery welding, characterized in that, include: A pressing member, comprising at least two sub-pressing members, wherein the sub-pressing members are arranged in a first direction and are respectively provided with a pressing head; At least two pressing mechanisms; Each of the sub-pressing members is respectively connected to a corresponding pressing mechanism, and is driven to press downward by the corresponding pressing mechanism, so that the pressing head abuts against the structure to be welded of the battery.

2. The welding device according to claim 1, wherein, The pressing mechanism comprises: Mounting plate; A driving member, disposed on the mounting plate and movable relative to the mounting plate along a second direction, wherein the second direction is perpendicular to the first direction, and the sub-pressing member is disposed on the driving member; A pressing device is installed on the mounting plate and has a movable end connected to the driving member, and is used to drive the driving member to press downward along the second direction.

3. The welding device according to claim 2, characterized in that, Also includes: A first guide rail, arranged along the first direction; Each of the pressing mechanisms is movably arranged on the first guide rail, and the mounting plate is provided with a sliding connection structure adapted to the first guide rail.

4. The welding device according to claim 3, characterized in that, The sliding connection structure includes a positioning mechanism and / or a locking mechanism, and the positioning mechanism is used to locate the position of the sliding connection structure on the first guide rail; The locking mechanism is used to lock the position of the sliding connection structure on the first guide rail.

5. The welding device according to claim 2, wherein The driving member comprises: A first plate body, parallel to the mounting plate and slidably connected to the mounting plate via a second guide rail; The second plate body is arranged at the bottom of the first plate body and forms an L-shaped structure or a T-shaped structure with the first plate body, and the sub-pressing member is installed on the second plate body.

6. The welding device according to claim 2, characterized in that, The pressing mechanism includes at least two pressing devices, and the at least two pressing devices are arranged at intervals along the first direction.

7. The welding device according to claim 2, characterized in that, The sub-pressing member is detachably connected to the driving member, and the driving member is provided with a locking mechanism for locking the sub-pressing member, wherein the locking mechanism comprises any one of an inflatable locking mechanism, an electromagnetic locking mechanism, a motor-driven locking mechanism, and a manual locking mechanism.

8. The welding device according to claim 1, characterized in that, The sub-pressing member is a plate-like structure, and is provided with a first through hole penetrating the upper and lower surfaces of the sub-pressing member. A second through hole aligned with the first through hole is provided in the middle of the pressing head, and the second through hole penetrates the upper and lower surfaces of the pressing head.

9. The welding device according to claim 8, wherein, The pressing mechanism further comprises: The protection plate is located on a side of the sub-pressing member away from the pressing head and is arranged around the area where the first through hole is located.

10. The welding device according to claim 9, characterized in that, The plurality of pressing heads are distributed along a straight line on the sub-pressing member; The protection plate is a rectangular frame arranged around the first through holes.

11. The welding device according to claim 8, characterized in that, The pressure head is provided with a dust suction channel, which is communicated with the second through hole and is used for sucking out particles formed by welding.

12. The welding device according to claim 1, characterized in that, The sub-pressing member and the pressing head are movably connected, and an elastic member is arranged between the sub-pressing member and the pressing head, and the elastic member is used to apply an elastic force away from the sub-pressing member to the pressing head.

13. A battery production line, characterized in that, include: Line body, used to carry the battery; And a welding device as described in any one of claims 1 to 12, wherein the welding device is arranged on the side of the wire body.

14. A control method for a welding device, characterized in that, The control method comprises: Control at least two pressing mechanisms to drive the corresponding sub-pressing members to press down, so that the pressing heads on the sub-pressing members abut against the structure to be welded of the battery, wherein the sub-pressing members are arranged along a first direction and are respectively provided with the pressing heads; Control the welding equipment to weld the structure to be welded.

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