Welding equipment and battery production line

Abstract

Disclosed in the present application are welding equipment and a battery production line. The welding equipment comprises: a fixing assembly (11) used for fixing a battery (20); a welding assembly (12), comprising a mechanical arm (121) and a welding head (122), the welding head (122) being used for fixing a welding wire (123), and the mechanical arm (121) being used for controlling the welding head (122) to perform laser filler wire welding on the battery (20). The welding equipment of the present application can improve welding efficiency during processing of batteries (20).

Description

Welding equipment and battery production lines

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410261588.X, filed on March 7, 2024, entitled “Welding Equipment and Battery Production Line,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of welding technology, and more specifically, to a welding device and a battery production line. Background Art

[0004] With the continuous advancement of battery technology, various new energy industries using batteries as energy storage devices have experienced rapid development. The development of battery technology requires simultaneous consideration of multiple design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters. Furthermore, battery processing efficiency must be considered. During battery processing and assembly, laser welding is often used for components that require welding. Therefore, the efficiency of laser welding directly affects the efficiency of battery processing.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a welding device and a battery production line, which can improve the welding efficiency during the battery processing process.

[0007] In a first aspect, a welding device is provided, which includes: a fixing component for fixing a battery; a welding component including a robotic arm and a welding head, the welding head is used to fix a welding wire, and the robotic arm is used to control the welding head to perform laser wire welding on the battery.

[0008] Therefore, compared with self-fluxing laser welding, the welding equipment of the embodiment of the present application can weld butt joint plates and thick plates with larger gaps, and can also adjust the chemical composition of the weld when connecting dissimilar metals, which has a significant effect on suppressing post-weld cracks. In addition, considering that aluminum alloy is a very common metal used in various battery components, but aluminum alloy has a high reflectivity to lasers, thermal cracks are easily generated during the welding process. These problems limit the application of high-power laser welding technology in the aluminum alloy processing industry. The use of welding wire as a filler material during the welding process can increase the absorption rate of the aluminum alloy and stabilize the welding process. For certain aluminum alloys that are prone to solidification cracks, the use of filler materials prevents the conditions for crack formation and improves the mechanical properties of the weld. In addition, by controlling the welding head to operate the welding wire for welding through a robotic arm, the position of the welding wire can be more flexibly adjusted according to actual welding requirements, thereby improving welding efficiency.

[0009] In some embodiments, the fixing assembly includes a first fixing component and a second fixing component disposed relative to each other along the height direction of the battery. The first fixing component and the second fixing component are configured to move relative to each other to clamp the battery along the height direction. The relative movement of the first fixing component and the second fixing component allows the battery to be clamped and fixed along the height direction of the battery, resulting in a simple structure, easy implementation, and good stability.

[0010] In some embodiments, the first fixing component is used to place the battery, and the second fixing component is used to move toward the first fixing component on which the battery is placed, so as to clamp the battery with the first fixing component along the height direction of the battery. The structure is simple, stable, and easy to implement.

[0011] In some embodiments, the second fixing component includes a roller structure, which is used to press the battery toward the first fixing component along the height direction of the battery via the roller structure. On the one hand, the roller structure can press the battery along the height direction, that is, limit the movement of the battery along its height direction; on the other hand, because the roller structure can roll on the contact surface with the battery, that is, it can have a small relative movement with the battery, the roller structure can allow the battery to move partially perpendicular to the height direction.

[0012] In some embodiments, the battery includes a plurality of battery cells, each of which is provided with an electrode terminal, and the roller structure is attached to the electrode terminal to facilitate positioning.

[0013] In some embodiments, the second fixing member is further configured to move along the height direction of the battery, away from the first fixing member, to release the battery. Thus, after the welding device completes welding the battery, the second fixing member can release the battery to facilitate replacement with a new battery to be welded.

[0014] In some embodiments, the fixing assembly includes two third fixing members disposed opposite each other along the length of the battery. The two third fixing members are configured to move relative to each other to clamp the battery along its length. The relative movement of the two third fixing members allows the battery to be clamped and fixed along its length, resulting in a simple structure, ease of implementation, and good stability.

[0015] In some embodiments, the battery includes two end plates and a plurality of battery cells arranged along the length direction of the battery; along the length direction of the battery, the two end plates are respectively located at both ends of the plurality of battery cells; the two third fixing components are respectively in contact with the end plates to clamp the battery, thereby improving the processing efficiency of the battery.

[0016] In some embodiments, the two third fixing members are further configured to move away from each other along the length of the battery to release the battery. In this way, after the welding device completes welding the battery, the two third fixing members can also release the battery to facilitate replacement of a new battery to be welded.

[0017] In some embodiments, the two third fixing components move synchronously, which can simplify the structure and facilitate control.

[0018] In some embodiments, the fixing assembly includes two fourth fixing members disposed opposite each other along the width of the battery. The two fourth fixing members are configured to move relative to each other to clamp the battery along the width of the battery. The relative movement of the two fourth fixing members allows the battery to be clamped and fixed along the width of the battery, resulting in a simple structure, ease of implementation, and good stability.

[0019] In some embodiments, the battery includes a side plate and a plurality of battery cells, and the two fourth fixing members are further configured to move relative to each other along the width of the battery to secure the side plate and the plurality of battery cells to each other. The side plate can be used to limit misalignment and movement of the battery along the width of the battery, thereby improving the structural stability of the battery.

[0020] In some embodiments, the two fourth fixing members are further configured to move away from each other along the width of the battery to loosen the battery. After the welding device completes welding the battery, the two fourth fixing members may also move away from each other along the width of the battery to loosen the battery, thereby facilitating replacement of a new battery to be welded.

[0021] In some embodiments, the two fourth fixing components move synchronously, which can simplify the structure and facilitate control.

[0022] In some embodiments, the battery includes end plates perpendicular to the length of the battery and side plates perpendicular to the width of the battery. The welding head is used to laser-weld the end plates to the side plates with a filler wire. During the processing and assembly of the battery, the two end plates can first be used to clamp multiple battery cells to secure them along their lengths; the side plates can then be used to clamp the multiple battery cells along their widths. For example, the end plates and side plates can be laser-welded with a filler wire using the welding head to secure the multiple battery cells together.

[0023] In a second aspect, a battery production line is provided, which includes: assembly equipment for assembling batteries, wherein the assembled battery includes two end plates and a plurality of battery cells arranged along the length direction of the battery, and along the length direction of the battery, the two end plates are respectively located at both ends of the plurality of battery cells; welding equipment, which is the welding equipment described in the first aspect or any one embodiment of the first aspect, and is used to perform laser wire welding on the assembled battery; the assembly equipment is also used to accommodate the welded battery in a box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic block diagram of a welding device according to an embodiment of the present application;

[0025] FIG2 is a schematic diagram of a partial structure of a battery according to an embodiment of the present application;

[0026] FIG3 is an exploded schematic diagram of a partial structure of a battery according to an embodiment of the present application;

[0027] FIG4 is a schematic structural diagram of a welding device according to an embodiment of the present application;

[0028] FIG5 is a schematic structural diagram of a welding assembly according to an embodiment of the present application;

[0029] FIG6 is another schematic structural diagram of a welding assembly according to an embodiment of the present application;

[0030] FIG7 is a schematic diagram of the position of the welding wire according to an embodiment of the present application;

[0031] FIG8 is another schematic diagram of the position of the welding wire according to an embodiment of the present application;

[0032] FIG9 is a schematic diagram of the welding effect of the end plate and the side plate according to an embodiment of the present application;

[0033] FIG10 is a schematic structural diagram of a fixing assembly according to an embodiment of the present application;

[0034] FIG11 is another schematic structural diagram of a fixing assembly according to an embodiment of the present application;

[0035] FIG12 is a schematic structural diagram of a second fixing component according to an embodiment of the present application;

[0036] FIG13 is another schematic structural diagram of a second fixing component according to an embodiment of the present application;

[0037] FIG14 is a schematic structural diagram of a third fixing component according to an embodiment of the present application;

[0038] FIG15 is a schematic structural diagram of a fourth fixing component according to an embodiment of the present application;

[0039] FIG16 is another schematic structural diagram of the fourth fixing component according to an embodiment of the present application.

[0040] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0044] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0047] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0048] The term "multiple" in this application 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).

[0049] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0050] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0051] In some implementations, the battery cell in the embodiment of the present application may be a metal battery. Specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery, etc., which is not limited in the embodiment of the present application.

[0052] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0053] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0054] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0055] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film. The housing includes a shell and a cover.

[0056] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0057] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid through a busbar.

[0058] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0059] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0060] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0061] The development of battery technology requires simultaneous consideration of multiple design factors, including performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, the efficiency of battery production and processing must be considered. During battery processing and assembly, laser welding is often used for components that require welding. Existing laser welding typically utilizes autogenous welding. However, laser welding places high demands on weld groove processing and assembly accuracy, which limits its application in battery processing.

[0062] Therefore, the embodiments of the present application provide a welding device and a battery production line that can solve the above problems. The welding device of the embodiments of the present application includes a fixing component and a welding component, wherein the fixing component can fix the battery so that the battery can be welded through the welding component. Furthermore, the welding component includes a robotic arm and a welding head, the welding head fixes the welding wire, and the robotic arm controls the welding head to perform laser wire welding on the battery through the welding wire. Laser wire welding can weld butt joint plates and thick plates with large gaps, and can also adjust the chemical composition of the weld when connecting dissimilar metals. It has a significant effect on suppressing post-weld cracks and can effectively improve welding efficiency.

[0063] The welding device described in the embodiment of the present application can be used for welding batteries, wherein the battery can be used in various electrical devices using batteries.

[0064] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0065] Figure 1 shows a schematic block diagram of a welding device 10 according to an embodiment of the present application. As shown in Figure 1, the welding device 10 according to an embodiment of the present application comprises a fixing assembly 11 and a welding assembly 12. Specifically, the fixing assembly 11 is used to fix the battery 20; the welding assembly 12 comprises a robotic arm 121 and a welding head 122. The welding head 122 is used to fix the welding wire 123, and the robotic arm 121 is used to control the welding head 122 to perform laser wire welding on the battery 20.

[0066] Compared to autogenous laser welding, the laser wire welding employed by the welding apparatus 10 of the present embodiment can weld butt joints with larger gaps and thicker plates. It can also adjust the chemical composition of the weld when joining dissimilar metals, significantly reducing post-weld cracking. Furthermore, by controlling the welding head 122 with the welding wire 123 through the robotic arm 121, the position of the welding wire 123 can be more flexibly adjusted based on actual welding requirements, thereby improving welding efficiency.

[0067] It should be understood that the welding device 10 of the embodiment of the present application can be used to weld the battery 20, for example, it can be used to weld any multiple components included in the battery 20. Figure 2 shows a schematic diagram of the partial structure of the battery 20 of the embodiment of the present application, and Figure 3 shows a schematic diagram of the partial structure of the battery 20 of the embodiment of the present application. For example, Figure 3 can be a schematic diagram of the exploded structure of the battery 20 shown in Figure 2. As shown in Figures 2 and 3, the battery 20 of the embodiment of the present application can include multiple battery cells 21. For example, Figures 2 and 3 take the example of the battery 20 including multiple battery cells 21 arranged along the longitudinal direction X of the battery 20.

[0068] It should be understood that the battery cells 21 of the embodiment of the present application can be used for processing and assembly into a battery 20. Specifically, in order to meet different power usage requirements, the battery 20 may include a plurality of battery cells 21, wherein the plurality of battery cells 21 can be connected in series or in parallel or in mixed connection, and mixed connection refers to a mixture of series and parallel connection. The battery 20 may also be referred to as a battery pack. Optionally, a plurality of battery cells 21 may first be connected in series or in parallel or in mixed connection to form a battery module, and a plurality of battery modules may then be connected in series or in parallel or in mixed connection to form a battery. In other words, a plurality of battery cells 21 may directly form a battery 20, or may first form a battery module, and the battery module may then form a battery 20. The embodiment of the present application is not limited to this.

[0069] In some embodiments, the battery cells 21 of the present application can have any shape. For example, the battery cells 21 can be cylindrical, prismatic, soft-pack, or other shapes. Prismatic cells include square-shell, blade-shaped, and polygonal prismatic cells. Polygonal prismatic cells, for example, hexagonal, are not particularly limited in this application. For ease of explanation, the present application mainly uses rectangular battery cells as an example.

[0070] In some embodiments, the battery cell 21 includes an electrode terminal 211. Specifically, the electrode terminal 211 of the embodiment of the present application is used to electrically connect to the electrode assembly inside the battery cell 21 to output the electrical energy of the battery cell 21. The battery cell 21 may include at least two electrode terminals 211, and the at least two electrode terminals 211 may include at least one positive electrode terminal and at least one negative electrode terminal. The positive electrode terminal is used to electrically connect to the positive electrode tab of the electrode assembly, and the negative electrode terminal is used to electrically connect to the negative electrode tab of the electrode assembly. The positive electrode terminal can be directly or indirectly connected to the positive electrode tab, and the negative electrode terminal can be directly or indirectly connected to the negative electrode tab. Exemplarily, the positive electrode terminal can be electrically connected to the positive electrode tab through a connecting member, and the negative electrode terminal can be electrically connected to the negative electrode tab through a connecting member.

[0071] It should be understood that the multiple electrode terminals 211 included in the battery cell 21 of the embodiment of the present application can be located on the same wall or on different walls. For example, as shown in Figures 2 and 3, the embodiment of the present application mainly uses the example of a battery cell 21 including two electrode terminals 211, and the two electrode terminals 211 are located on the same wall, but the embodiment of the present application is not limited to this.

[0072] In some embodiments, the battery cell 21 may further include other components, which are not described in detail here for the sake of brevity. For example, the battery cell 21 may further include a pressure relief mechanism, which is an element or component that is activated to relieve the internal pressure or temperature of the battery cell 21 when the internal pressure or temperature reaches a predetermined threshold.

[0073] In some embodiments, the battery 20 may further include an end plate 22 , which is perpendicular to the length direction X of the battery 20 . Specifically, the battery 20 may include at least two end plates 22 . For example, as shown in FIG2 and FIG3 , the battery 20 includes two end plates 22 ; along the length direction X of the battery 20 , the two end plates 22 are respectively located at both ends of the plurality of battery cells 21 , that is, the two end plates 22 clamp the plurality of battery cells 21 along the length direction X of the battery 20 to secure the plurality of battery cells 21 .

[0074] In some embodiments, the battery 20 may further include a buffer 24, which is perpendicular to the length direction X of the battery 20. For example, as shown in Figures 2 and 3, the buffer 24 can be provided between any two adjacent battery cells 21, and the buffer 24 can also be provided between the battery cell 21 and the end plate 22. The buffer 24 can be used to absorb the deformation of the battery cell 21, as well as to absorb the interaction force between the battery cells 21. For example, during the use of the battery 20, if the battery cell 21 expands, the squeezing force exerted on the battery cell 21 by the adjacent battery cells 21 can be reduced. If the battery cell 21 expands, the buffer 24 can also fill the gaps between the battery cells 21 to improve the stability between the multiple battery cells 21.

[0075] In some embodiments, the battery 20 may further include a side plate 23, which is perpendicular to the width direction Y of the battery 20. Specifically, the battery 20 may include at least two side plates 23. For example, as shown in Figures 2 and 3, the battery 20 includes two side plates 23. Along the width direction Y of the battery 20, the two side plates 23 are respectively located on both sides of the multiple battery cells 21. That is, the two side plates 23 can be used to clamp the multiple battery cells 21 along the width direction Y of the battery 20 to fix the multiple battery cells 21.

[0076] It should be understood that the length direction X of the battery 20 in the embodiment of the present application is perpendicular to the width direction Y, and the length direction X of the battery 20 is greater than the width direction Y. Furthermore, the height direction Z of the battery 20 is perpendicular to the length direction X and the width direction Y of the battery 20. As shown in Figures 2 and 3, the embodiment of the present application takes the height direction Z of the battery 20 as an example, in which the height direction Z is perpendicular to the wall where the electrode terminal 211 of the battery cell 21 is located, but the embodiment of the present application is not limited to this.

[0077] In some embodiments, the battery 20 includes an end plate 22 perpendicular to the length direction X of the battery 20 and a side plate 23 perpendicular to the width direction Y of the battery 20. The welding head 122 is used to laser-weld the end plate 22 and the side plate 23 with a filler wire. During the processing and assembly of the battery 20, the two end plates 22 can first be used to clamp the multiple battery cells 21 to fix the multiple battery cells 21 along the length direction X of the battery cells 21; then, the side plates 23 can be used to clamp the multiple battery cells 21 along the width direction Y of the battery cells 21. For example, the end plates 22 and the side plates 23 can be laser-welded with a filler wire using the welding head 122 to jointly fix the multiple battery cells 21.

[0078] Aluminum alloy is a very common metal used in various components of battery 20. For example, the material of end plate 22 and / or side plate 23 may include aluminum alloy. However, aluminum alloy has a high reflectivity to laser light, which can easily cause thermal cracking during welding. These problems limit the application of high-power laser welding technology in the aluminum alloy processing industry. However, using welding wire 123 as a filler material during welding can improve the absorptivity of the aluminum alloy and stabilize the welding process. For certain aluminum alloys prone to solidification cracking, the use of filler material prevents the conditions for crack formation and improves the mechanical properties of the weld.

[0079] In some embodiments, the battery 20 may further include other components. For example, the battery 20 may further include a busbar component, which is used to electrically connect to the electrode terminals 211 of the plurality of battery cells 21 to achieve electrical connection between the plurality of battery cells 21. Accordingly, the welding device 10 of the embodiment of the present application may also be used to weld other components of the battery 20. For the sake of brevity, these will not be described in detail here.

[0080] FIG4 is a schematic structural diagram of a welding device 10 according to an embodiment of the present application. For example, FIG4 may be a possible implementation of the welding device 10 shown in FIG1 . It should be understood that the welding device 10 according to an embodiment of the present application may include at least one fixing assembly 11. For example, to improve welding efficiency, the welding device 10 may include multiple fixing assemblies 11, each of which may be used to fix at least one battery 20, thereby improving the welding efficiency of multiple batteries 20. For example, as shown in FIG4 , the embodiment of the present application takes the example of a welding device 10 including two fixing assemblies 11, and each fixing assembly 11 is used to fix one battery 20. In this way, the welding assembly 12 included in the welding device 10 can be used to weld the batteries 20 fixed by the two fixing assemblies 11, respectively, thereby saving time in replacing the batteries 20 to be welded. For example, after the welding component 12 completes welding the battery 20 fixed by the left fixing component 11, it can turn to welding the battery 20 fixed by the right fixing component 11; and, when the welding component 12 welds the battery 20 fixed by the right fixing component 11, the left fixing component 11 can be replaced with a new battery 20 to be welded, so that after the welding component 12 completes welding the battery 20 fixed by the right fixing component 11, it can directly weld the new battery 20 to be welded fixed by the left fixing component 11, and cycle in sequence, thereby saving the replacement time of the battery 20 and improving processing efficiency.

[0081] The welding assembly 12 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0082] Figures 5 and 6 are schematic structural diagrams of the welding assembly 12 according to an embodiment of the present application from different angles. For example, the welding assembly 12 shown in Figures 5 and 6 may be the welding assembly 12 included in the welding device 10 shown in Figure 4. As shown in Figures 4 to 6, the welding assembly 12 according to the embodiment of the present application may include a robotic arm 121 and a welding head 122, wherein the welding head 122 is used to fix the welding wire 123, and the robotic arm 121 is used to control the welding head 122 to perform laser wire welding on the battery 20.

[0083] Furthermore, the welding head 122 further includes a laser component 1221, which is used to emit laser to facilitate laser wire welding.

[0084] In some embodiments, the welding device 10 further includes a bracket 13, which is used to secure the welding assembly 12. Furthermore, the bracket 13 can also be used to secure at least one fixed assembly 11. For example, as shown in Figures 4 to 6, a robotic arm 121 is mounted on the bracket 13. The robotic arm 121 can rotate relative to the bracket 13, so that the robotic arm 121 can drive the connected welding head 122 to rotate, and then use the welding head 122 to weld the batteries 20 secured to the fixed assemblies 11 on both sides of the bracket 13.

[0085] It should be understood that, depending on the welding process and actual needs, the welding wire 123 used in laser wire welding can be fed from the front or rear of the laser and at a certain angle to the laser's optical axis. For example, in laser wire welding, the welding wire 123 is generally required to be coplanar with the weld seam in the vertical plane. This ensures stable transfer of the molten droplet even when minor fluctuations occur during wire feeding. The straightness of the welding wire 123 is very important for welding stability and can affect the welding wire 123's absorption of the beam energy and the stability of the welding process.

[0086] Therefore, the effect of filler wire welding is strongly correlated with the welding angle. By using the robotic arm 121 to control the welding head 122, the robotic arm 121 can drive the welding wire 123 to move in multiple directions, thereby improving the multi-angle adjustability of the welding wire 123 and making the welding wire 123 suitable for adjustment of multiple welding angles.

[0087] In some embodiments, the robotic arm 121 is a six-axis robotic arm, so that the robotic arm 121 can control the all-round movement of the welding head 122, and then control the welding wire 123 to be located at any position, meet the arbitrary angle requirements of the welding wire 123, thereby improving the flexibility of the welding equipment 10, and improving the welding efficiency and welding effect.

[0088] Figures 7 and 8 are schematic diagrams illustrating the position of welding wire 123 in an embodiment of the present application. As shown in Figures 7 and 8 , the example of welding end plate 22 and side plate 23 is shown, where welding wire 123 is controlled by welding head 122 to perform laser filler welding of end plate 22 and side plate 23. Furthermore, welding wire 123 needs to move along weld seam 221 to perform laser filler welding of end plate 22 and side plate 23.

[0089] It should be understood that the angle of the welding wire 123 during welding in the embodiment of the present application can be adjusted according to actual application. For example, as shown in Figures 7 and 8, the welding wire 123 and the weld seam 221 are coplanar, and the planes on which the welding wire 123 and the weld seam 221 lie are perpendicular to each other. In this way, even when slight fluctuations occur during wire feeding, stable transfer of the molten droplet can be ensured.

[0090] In some embodiments, as shown in FIG7 , the angle α between the welding wire 123 and the plane perpendicular to the weld seam 221 can be flexibly set according to the actual application. For example, the value range of α can be set to [30°, 75°] to improve the welding effect. For another example, α can be set to 45°.

[0091] In some embodiments, as shown in FIG8 , the angle β between the welding wire 123 and the straight line of the weld 221 can also be flexibly set according to the actual application. For example, the value range of β can be set to [30°, 75°] to improve the welding effect. For another example, β can be set to 30°.

[0092] In the embodiments of this application, welding speed is also a key process parameter for wire-filled laser welding. Properly selecting the welding speed can fully utilize laser energy and improve production and processing efficiency. Because welding wire 123 is almost 100% absorbed into the weld pool during laser welding, the wire feed speed of welding wire 123 can be calculated based on the material balance of the welding process.

[0093] FIG9 shows a schematic diagram of the welding effect of the end plate 22 and the side plate 23 of the embodiment of the present application. For example, FIG9 can be a schematic diagram of the welding effect of FIG7 and FIG8. As shown in FIG9, here we still use the laser wire welding to weld the end plate 22 and the side plate 23 as an example. The cross-sectional height h and the joint gap W of the weld 221 are gap All rely on welding wire 123 for filling, according to the thickness of the weldment δ and the gap W gap Size, wire feeding speed v f and welding speed υ w The following relationship exists:

[0094] Among them, W in the above formula gap is the gap between the joints (mm), δ is the thickness of the workpiece (mm), υ w is the welding speed (m / min), D is the diameter of the welding wire 123 (mm), v f is the wire feeding speed (m / min), K is the forming coefficient, and the value of K can be determined according to the requirement of the welding reinforcement h. For example, the value of K is usually about 1.1-1.2.

[0095] When determining process parameters, estimate the welding speed and then determine the wire feed speed based on the above relationship. Then, perform process verification and adjust the welding speed based on weld quality. If the workpiece is not fully welded, reduce the welding speed and wire feed speed accordingly.

[0096] Therefore, the filler wire welding effect is strongly correlated with the welding speed. Controlling the position and speed of the welding wire 123 of the welding head 122 by the robotic arm 121 can be more flexible and suitable for different welding speed requirements in multiple scenarios.

[0097] The fixing assembly 11 of the embodiment of the present application will be described below with reference to the accompanying drawings.

[0098] Figures 10 and 11 respectively show structural schematic diagrams of the fixing component 11 of an embodiment of the present application at different angles. For example, Figures 10 and 11 may be any one of the fixing components 11 included in the welding equipment 10 shown in Figure 4. For example, Figures 10 and 11 may be the fixing component 11 on the left side of the welding equipment 10 shown in Figure 4, and the fixing component 11 on the right side of the welding equipment 10 may also adopt the same fixing component 11 as Figures 10 and 11, but the embodiments of the present application are not limited to this.

[0099] In some embodiments, the fixing assembly 11 includes a first fixing component 111 and a second fixing component 112 disposed relative to each other along the height direction Z of the battery 20. The first fixing component 111 and the second fixing component 112 are configured to move relative to each other to clamp the battery 20 along the height direction Z of the battery 20. The relative movement of the first fixing component 111 and the second fixing component 112 allows the battery 20 to be clamped and fixed along the height direction Z of the battery 20. This has a simple structure, is easy to implement, and has good stability.

[0100] The first fixing component 111 and the second fixing component 112 of the embodiment of the present application can be implemented in a variety of ways. For example, the first fixing component 111 is used to place the battery 20, and the second fixing component 112 is used to move toward the first fixing component 111 on which the battery 20 is placed, so as to clamp the battery 20 with the first fixing component 111 along the height direction Z of the battery 20. Specifically, the first fixing component 111 may include a placement area. The battery 20 is transported to the placement area using a clamping tool or manual lifting. The battery 20 can then be placed on the first fixing component 111 under its own gravity. The first fixing component 111 can carry the battery 20 to a preset position so as to be arranged opposite the second fixing component 112 along the height direction Z of the battery 20. The second fixing component 112 then moves toward the opposite first fixing component 111 and can clamp the battery 20 with the first fixing component 111 along the height direction Z of the battery 20.

[0101] The second fixing component 112 of the embodiment of the present application can be implemented in a variety of ways. For example, the second fixing component 112 includes a roller structure 1121. The second fixing component 112 is used to press the battery 20 toward the first fixing component 111 along the height direction Z of the battery 20 via the roller structure 1121. On the one hand, the roller structure 1121 can press the battery 20 along the height direction Z of the battery 20, thereby limiting the movement of the battery 20 along its height direction Z. On the other hand, because the roller structure 1121 can roll on the contact surface with the battery 20, thereby allowing for small relative movement between the roller structure 1121 and the battery 20, the roller structure 1121 can allow for partial movement of the battery 20 perpendicular to the height direction Z.

[0102] Figure 12 shows a partial structural diagram of the second fixing component 112 according to an embodiment of the present application, and Figure 13 shows another partial structural diagram of the second fixing component 112 according to an embodiment of the present application. For example, Figures 12 and 13 may be the second fixing component 112 included in the fixing assembly 11 shown in Figures 10 and 11, but at different angles. As shown in Figures 12 and 13, the second fixing component 112 may include multiple roller structures 1121, with different roller structures 1121 corresponding to different battery cells 21, so that the roller structures 1121 can compress the multiple battery cells 21 accordingly.

[0103] In some embodiments, the battery 20 includes a plurality of battery cells 21, each of which is provided with an electrode terminal 211. The roller structure 1121 is attached to the electrode terminal 211 to facilitate positioning. Considering that the electrode terminal 211 is generally protruding from the outer shell of the battery cell 21, the roller structure 1121 is attached to the electrode terminal 211 to facilitate positioning. Furthermore, the roller structure 1121 can be provided in a one-to-one correspondence with the plurality of electrode terminals 211 of the plurality of battery cells 21, that is, each roller structure 1121 is attached to a corresponding electrode terminal 211, so as to limit the movement of each battery cell 21 along the height direction Z of the battery 20.

[0104] In some embodiments, the second fixing member 112 is further configured to move along the height direction Z of the battery 20, away from the first fixing member 111, to release the battery 20. Thus, after the welding device 10 completes welding the battery 20, the second fixing member 112 can release the battery 20 to facilitate replacement with a new battery 20 to be welded.

[0105] In some embodiments, the second fixing component 112 also includes a lifting structure 1122. As shown in Figure 12, the lifting structure 1122 can be used to control the roller structure 1121 to descend, so that the roller structure 1121 gradually approaches the first fixing component 111, and then clamps the battery 20 with the first fixing component 111; the lifting structure 1122 can also be used to control the roller structure 1121 to rise, so as to control the roller structure 1121 to move in a direction away from the first fixing component 111, and then release the battery 20, so that the first fixing component 111 can carry the battery 20 away from the preset position, and then leave the fixing component 11.

[0106] It should be understood that the movement mode of the first fixing component 111 and the second fixing component 112 in the embodiment of the present application can be set according to the actual application. For example, the first fixing component 111 and the second fixing component 112 can move synchronously relative to each other so that the first fixing component 111 and the second fixing component 112 gradually approach each other and clamp the battery 20, or the first fixing component 111 and the second fixing component 112 gradually move away from each other to release the battery 20. For another example, the first fixing component 111 can be fixed at a preset position and not move, and the second fixing component 112 moves toward the first fixing component 111 to gradually approach the first fixing component 111 and thereby clamp the battery 20, or the second fixing component 112 moves in a direction away from the first fixing component 111 to gradually move away from the first fixing component 111 and thereby release the battery 20. The embodiments of the present application are not limited to this.

[0107] In the embodiment of the present application, the fixing assembly 11 includes two third fixing components 113 disposed opposite each other along the longitudinal direction X of the battery 20. The two third fixing components 113 are configured to move relative to each other to clamp the battery 20 along the longitudinal direction X of the battery 20. The relative movement of the two third fixing components 113 allows the battery 20 to be clamped and fixed along the longitudinal direction X of the battery 20. This structure is simple, easy to implement, and has good stability.

[0108] In some embodiments, a battery 20 includes two end plates 22 and a plurality of battery cells 21 arranged along a longitudinal direction X of the battery 20. Along the longitudinal direction X of the battery 20, the two end plates 22 are located at either end of the plurality of battery cells 21. Two third fixing members 113 respectively contact the end plates 22 to clamp the battery 20. To facilitate the movement and processing of the plurality of battery cells 21 arranged along the longitudinal direction X of the battery 20, the end plates 22 are typically used to clamp and secure the plurality of battery cells 21, allowing the plurality of battery cells 21 clamped and secured by the two end plates 22 to be moved and further processed as a whole. Therefore, two opposing third fixing members 113 can be arranged to contact their respective end plates 22, thereby clamping the end plates 22 and the plurality of battery cells 21 located between the two end plates 22 to secure the battery 20 along the longitudinal direction X of the battery 20.

[0109] Furthermore, the two third fixing members 113 can also be used to adjust the length of the battery 20. For example, the two third fixing members 113 can be used to compress the length of the battery 20 to make the multiple battery cells 21 more compact and improve the structural stability of the battery 20.

[0110] FIG14 is a schematic structural diagram of a third fixing member 113 according to an embodiment of the present application. For example, the third fixing member 113 shown in FIG14 may be one of the third fixing members 113 of the fixing assembly 11 shown in FIG10 and FIG11 . Another third fixing member 113 included in the fixing assembly 11 may have the same structure as FIG14 and be disposed opposite the third fixing member 113 shown in FIG14 . As shown in FIG14 , the third fixing member 113 may include a contact portion 1131 configured to contact the end plate 22 to clamp the end plate 22 .

[0111] In some embodiments, the battery 20 may be clamped and fixed along the height direction Z of the battery 20 by the first fixing component 111 and the second fixing component 112, and then the battery 20 may be clamped and fixed along the length direction X of the battery 20 by two oppositely arranged third fixing components 113. For example, as shown in FIG14 , the third fixing component 113 may further include a connecting portion 1132, which is used to connect to the second fixing component 112, so that when the second fixing component 112 moves along the height direction Z of the battery 20, the connecting portion 1132 can drive the third fixing component 113 to move along the height direction Z of the battery 20, so that the third fixing component 113 approaches the battery 20 along the height direction Z of the battery 20, and then moves along the length direction X of the battery 20 to clamp the battery 20.

[0112] In some embodiments, since the second fixing component 112 includes a roller structure 1121, when the roller structure 1121 presses the battery 20 along the height direction Z of the battery 20, if the third fixing component 113 clamps and compresses the length of the battery 20 through the contact portion 1131, the roller structure 1121 can roll at the contact area with the battery 20 to allow the battery 20 to move along its length direction X to adjust the length of the battery 20.

[0113] In some embodiments, the two third fixing members 113 are further configured to move away from each other along the length direction X of the battery 20 to release the battery 20. Thus, after the welding device 10 completes welding the battery 20, the two third fixing members 113 can release the battery 20 to facilitate replacement with a new battery 20 to be welded.

[0114] It should be understood that the movement of the two third fixing components 113 in the embodiment of the present application can be configured according to actual application. For example, the two third fixing components 113 can move synchronously so that the two third fixing components 113 gradually approach each other and clamp the battery 20 in the middle area of ​​the two third fixing components 113 to facilitate positioning; or the two third fixing components 113 can move synchronously and gradually move away from each other to release the battery 20. For another example, the two third fixing components 113 can also move asynchronously. The movement of the two third fixing components 113 can be controlled separately according to the actual position of the battery 20. The movement distance of the two third fixing components 113 is more flexible to accommodate batteries 20 of different positions and sizes.

[0115] In the embodiment of the present application, the fixing assembly 11 includes two fourth fixing members 114 disposed opposite each other along the width direction Y of the battery 20. The two fourth fixing members 114 are configured to move relative to each other to clamp the battery 20 along the width direction Y of the battery 20. The relative movement of the two fourth fixing members 114 allows the battery 20 to be clamped and fixed along the width direction Y of the battery 20. This provides a simple structure, is easy to implement, and has good stability.

[0116] In some embodiments, the battery 20 includes a side plate 23 and a plurality of battery cells 21, and the two fourth fixing components 114 are further used to move relative to each other along the width direction Y of the battery 20 to fix the side plate 23 and the plurality of battery cells 21 to each other. The side plate 23 can be used to limit the misalignment and movement of the battery 20 along the width direction Y of the battery 20 to improve the structural stability of the battery 20. The fixing assembly 11 of the embodiment of the present application can also be used to install the side plate 23. Specifically, the two fourth fixing components 114 can be used to transport the side plate 23, move the side plate 23 to both sides of the battery 20, and drive the side plate 23 close to the battery 20, clamp the plurality of battery cells 21 through the side plate 23, so as to position the side plate 23 and the plurality of battery cells 21, thereby enabling the welding assembly 12 to weld the side plate 23 to the end plate 22, thereby achieving fixation between the side plate 23 and the plurality of battery cells 21.

[0117] Furthermore, the two fourth fixing members 114 can also be used to adjust the position of the multiple battery cells 21 along the width direction Y of the battery 20. Considering that the end plates 22 are primarily used to restrict the position of the multiple battery cells 21 along the length direction X of the battery 20, there may be misalignment between the multiple battery cells 21 along the width direction Y of the battery 20, that is, the multiple battery cells 21 are misaligned along the width direction Y of the battery 20. Therefore, when the two fourth fixing members 114 clamp the multiple battery cells 21 via the side plates 23, the multiple battery cells 21 can be moved and aligned relative to each other along the width direction Y of the battery 20 under the action of the side plates 23, so as to be neatly positioned between the two side plates 23.

[0118] It should be understood that the fourth fixing component 114 of the embodiment of the present application can be implemented in a variety of ways. Figures 15 and 16 respectively show structural schematic diagrams of the fourth fixing component 114 of the embodiment of the present application at different angles. For example, the fourth fixing component 114 shown in Figures 15 and 16 can be one of the fourth fixing components 114 of the fixing assembly 11 shown in Figures 10 and 11. The other fourth fixing component 114 included in the fixing assembly 11 can adopt the same structure as Figures 15 and 16 and be arranged relative to the fourth fixing component 114 shown in Figures 15 and 16. As shown in Figures 15 and 16, the fourth fixing component 114 may include an adsorption surface 1141, which is used to adsorb the side plate 23 to drive the side plate 23 to move, so that the side plate 23 can clamp multiple battery cells 21.

[0119] In some embodiments, the adsorption surface 1141 of the fourth fixing component 114 may be provided with a suction cup 1142 . For example, the adsorption surface 1141 may be provided with a plurality of suction cups 1142 , and the suction cups 1142 provide suction force to adsorb the side panel 23 .

[0120] The number and position of the suction cups 1142 in the embodiment of the present application can be flexibly configured based on actual application. For example, the number of suction cups 1142 can be appropriately configured based on the weight and size of the side panel 23, as well as the maximum suction force of each suction cup 1142. For another example, if the suction surface 1141 is provided with multiple suction cups 1142, these multiple suction cups 1142 are typically evenly and symmetrically distributed to ensure uniform force on the side panel 23, thereby improving the stability of the side panel 23 during transportation.

[0121] It should be understood that the fixing order of the fixing assembly 11 in the embodiment of the present application can be flexibly set according to actual application. For example, the battery 20 can generally be clamped and fixed along the height direction Z of the battery 20 by the first fixing component 111 and the second fixing component 112, and then the battery 20 can be clamped and fixed along the length direction X of the battery 20 by the two third fixing components 113, and the battery 20 can be clamped and fixed along the width direction Y of the battery 20 by the two fourth fixing components 114, but the embodiment of the present application is not limited to this.

[0122] As an embodiment, when the battery 20 is clamped and fixed along the height direction Z of the battery 20 by the first fixing member 111 and the second fixing member 112, the battery 20 can first be clamped and fixed along the length direction X of the battery 20 by two oppositely disposed third fixing members 113, and then the battery 20 can be clamped and fixed along the width direction Y of the battery 20 by two fourth fixing members 114. Specifically, when the battery 20 is clamped and fixed along the height direction Z of the battery 20 by the first fixing member 111 and the second fixing member 112, the two end plates 22 and the battery cells 21 located between the two end plates 22 can first be clamped by the two oppositely disposed third fixing members 113 to adjust the length of the battery 20; then, the side plates 23 can be attracted and fixed to the multiple battery cells 21 by the two fourth fixing members 114. This can adjust the width of the battery 20 to align the multiple battery cells 21 and the end plates 22, and can also install the side plates 23 to facilitate welding the end plates 22 and side plates 23 using the welding assembly 12.

[0123] As another embodiment, in the case where the battery 20 is clamped and fixed along the height direction Z of the battery 20 by the first fixing component 111 and the second fixing component 112, the battery 20 can also be first clamped and fixed along the width direction Y of the battery 20 by two fourth fixing components 114, and then the battery 20 can be clamped and fixed along the length direction X of the battery 20 by two oppositely arranged third fixing components 113. For example, when the battery 20 is clamped and fixed along the height direction Z of the battery 20 by the first fixing component 111 and the second fixing component 112, the two fourth fixing components 114 can be controlled to move relative to each other along the width direction Y of the battery 20 to adjust the width of the battery 20 so that the multiple battery cells 21 and the end plate 22 are aligned in the width direction Y of the battery 20; then, the two end plates 22 and the battery cells 21 located between the two end plates 22 are clamped by two relatively arranged third fixing components 113 to adjust the length of the battery 20; and then the side plates 23 are adsorbed by the two fourth fixing components 114, and the side plates 23 are fixed and installed with the multiple battery cells 21, so as to facilitate welding of the end plates 22 and the side plates 23 by the welding assembly 12.

[0124] Considering that adjusting the length of the battery 20 using two opposing third fixing members 113 will make the multiple battery cells 21 more compact, increasing the stability of the battery 20, it also increases the difficulty of moving the battery cells 21 relative to each other. Therefore, adjusting the length of the battery 20 first and then aligning the multiple battery cells 21 in the width direction Y of the battery 20 using the two fourth fixing members 114 would be more difficult. However, first aligning the multiple battery cells 21 in the width direction Y of the battery 20 using the two fourth fixing members 114 and then adjusting the length of the battery 20 using the two third fixing members 113 can reduce the processing difficulty and facilitate implementation.

[0125] In some embodiments, the two fourth fixing members 114 are further configured to move away from each other along the width direction Y of the battery 20 to release the battery 20. For example, when the two fourth fixing members 114 are not attached to the side panel 23, the two fourth fixing members 114 can first be used to clamp and adjust the multiple battery cells 21 through relative movement. Then, the two fourth fixing members 114 can be controlled to move away from each other along the width direction Y of the battery 20, gradually moving away from the battery 20. Furthermore, after the two fourth fixing members 114 are released and away from the battery 20, they can be moved to the location of the side panel 23, attach to the side panel 23, and then move relative to each other along the width direction Y of the battery 20 to clamp the multiple battery cells 21 to install and position the side panel 23. For another example, after the welding device 10 completes welding of the battery 20, the two fourth fixing members 114 can also be moved away from each other along the width direction Y of the battery 20 to release the battery 20, facilitating replacement of a new battery 20 to be welded.

[0126] In some embodiments, after the welding device 10 completes welding the battery 20, the order in which the fixing assembly 11 releases the battery 20 can be flexibly set based on actual application. For example, the two third fixing components 113 and the two fourth fixing components 114 of the fixing assembly 11 can be first set to release and move away from the battery 20, and then the second fixing component 112 can be moved away from the battery 20, and then the battery 20 can be moved away by the first fixing component 111. For another example, the two fourth fixing components 114 and the two third fixing components 113 can be set to release and move away from the battery 20 at the same time, or the two fourth fixing components 114 can be set to release and move away from the battery 20 first, and then the two third fixing components 113 can be released and move away from the battery 20. The embodiments of the present application are not limited to this.

[0127] In some embodiments, the fourth fixing component 114 also includes a telescopic structure 1143, as shown in Figure 16. The telescopic structure 1143 can be used to control the adsorption surface 1141 to extend so that the adsorption surface 1141 gradually approaches the battery 20, and then clamps the battery 20 with another fourth fixing component 114 arranged oppositely; the telescopic structure 1143 can also be used to control the adsorption surface 1141 to retract, so as to control the adsorption surface 1141 to move in a direction away from the battery 20, and then release the battery 20, so that the first fixing component 111 can carry the battery 20 away from the preset position, and then leave the fixing component 11.

[0128] It should be understood that the fixing assembly 11 of the embodiment of the present application can also fix the battery 20 in other sequences, and can also loosen and move away from the battery 20 in other sequences, which are not listed here one by one.

[0129] The movement of the two fourth fixing members 114 in the embodiment of the present application can be configured based on actual application. For example, the two fourth fixing members 114 can move synchronously, gradually approaching each other, and clamping the battery 20 in the middle area of ​​the two fourth fixing members 114 to facilitate positioning; alternatively, the two fourth fixing members 114 can move synchronously and gradually move away from each other to release the battery 20. For another example, the two fourth fixing members 114 can also move asynchronously, and the movement of the two fourth fixing members 114 can be controlled separately based on the actual position of the battery 20, providing more flexible movement distances to accommodate batteries 20 of different positions and sizes.

[0130] According to some embodiments of the present application, referring to Figures 4 to 16 , a welding device 10 is provided. The welding device 10 includes a fixing assembly 11 and a welding assembly 12. The fixing assembly 11 is used to fix a battery 20. The welding assembly 12 includes a robotic arm 121 and a welding head 122. The welding head 122 is used to fix a welding wire 123. The robotic arm 121 is used to control the welding head 122 to perform laser filler welding on the battery 20. The fixing assembly 11 includes a first fixing component 111 and a second fixing component 112 disposed opposite each other along the height direction Z of the battery 20. The first fixing component 111 and the second fixing component 112 are configured to move relative to each other to clamp the battery 20 along the height direction Z of the battery 20. The second fixing component 112 includes a roller structure 1121. The second fixing component 112 is configured to press the battery 20 toward the first fixing component 111 along the height direction Z of the battery 20 via the roller structure 1121. The fixing assembly 11 includes two third fixing components 113 disposed opposite each other along the length direction X of the battery 20. The two third fixing components 113 are configured to move relative to each other to clamp the battery 20 along the length direction X of the battery 20. The fixing assembly 11 includes two fourth fixing components 114 disposed opposite each other along the width direction Y of the battery 20. The two fourth fixing components 114 are configured to move relative to each other to clamp the battery 20 along the width direction Y of the battery 20. The robotic arm 121 is a six-axis robotic arm. The battery 20 includes an end plate 22 perpendicular to the length direction X of the battery 20 and a side plate 23 perpendicular to the width direction Y of the battery 20. The welding head 122 is configured to laser weld the end plate 22 to the side plate 23 with filler wire.

[0131] In some embodiments, the present application further provides a battery production line, comprising an assembly device and a welding device 10. Specifically, the assembly device is used to assemble a battery 20, wherein the assembled battery 20 comprises two end plates 22 and a plurality of battery cells 21 arranged along a length direction X of the battery 20, wherein the two end plates 22 are respectively located at both ends of the plurality of battery cells 21 along the length direction X of the battery 20; the welding device 10 may be the welding device 10 of the aforementioned embodiments of the present application, and is used to perform laser wire welding on the assembled battery 20.

[0132] For example, the fixing assembly 11 of the welding device 10 can be used to fix the battery 20 assembled by the assembly device to the side plate, and the end plate 22 and the side plate 23 are laser-welded by the welding assembly 12 .

[0133] In some embodiments, the assembly apparatus is further configured to house the welded battery 20 in a box. For example, after the welding apparatus 10 completes welding, the fixing assembly 11 releases the battery 20, allowing the battery 20 to separate from the welding apparatus 10. The assembly apparatus can then house the welded battery 20 in a box having an opening and then close the opening, completing the assembly of the battery 20.

[0134] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 device, characterized in that: include: A fixing assembly (11) for fixing a battery (20); A welding assembly (12) comprises a robotic arm (121) and a welding head (122), wherein the welding head (122) is used to fix a welding wire (123), and the robotic arm (121) is used to control the welding head (122) to perform laser wire welding on the battery (20).

2. The welding equipment according to claim 1, characterized in that The fixing assembly (11) comprises a first fixing component (111) and a second fixing component (112) arranged relatively along a height direction (Z) of the battery (20); the first fixing component (111) and the second fixing component (112) are used for relative movement to clamp the battery (20) along the height direction (Z) of the battery (20).

3. The welding equipment according to claim 2, characterized in that The first fixing component (111) is used to place the battery (20), and the second fixing component (112) is used to move toward the first fixing component (111) on which the battery (20) is placed, so as to clamp the battery (20) along the height direction (Z) of the battery (20) with the first fixing component (111).

4. The welding equipment according to claim 3, characterized in that The second fixing component (112) includes a roller structure (1121), and the second fixing component (112) is used to press the battery (20) toward the first fixing component (111) via the roller structure (1121) along the height direction (Z) of the battery (20).

5. The welding device according to claim 4, characterized in that The battery (20) includes a plurality of battery cells (21), each of the battery cells (21) is provided with an electrode terminal (211), and the roller structure (1121) is attached to the electrode terminal (211).

6. The welding device according to any one of claims 3 to 5, characterized in that The second fixing component (112) is further used to move along the height direction (Z) of the battery (20) in a direction away from the first fixing component (111) to release the battery (20).

7. The welding device according to any one of claims 1 to 6, characterized in that The fixing assembly (11) comprises two third fixing parts (113) arranged opposite to each other along the length direction (X) of the battery (20), and the two third fixing parts (113) are used for relative movement to clamp the battery (20) along the length direction (X) of the battery (20).

8. The welding device according to claim 7, characterized in that The battery (20) comprises two end plates (22) and a plurality of battery cells (21) arranged along the length direction (X) of the battery (20); along the length direction (X) of the battery (20), the two end plates (22) are respectively located at two ends of the plurality of battery cells (21); and the two third fixing components (113) are respectively in contact with the end plates (22) to clamp the battery (20).

9. The welding device according to claim 7 or 8, characterized in that: The two third fixing components (113) are further used to move away from each other along the length direction (X) of the battery (20) to loosen the battery (20).

10. The welding device according to any one of claims 7 to 9, characterized in that The two third fixing components (113) move synchronously.

11. The welding device according to any one of claims 1 to 10, characterized in that The fixing assembly (11) comprises two fourth fixing components (114) arranged opposite to each other along the width direction (Y) of the battery (20), and the two fourth fixing components (114) are used for relative movement to clamp the battery (20) along the width direction (Y) of the battery (20).

12. The welding device according to claim 11, characterized in that The battery (20) comprises a side plate (23) and a plurality of battery cells (21), and the two fourth fixing components (114) are further used to move relatively along the width direction (Y) of the battery (20) to fix the side plate (23) and the plurality of battery cells (21) to each other.

13. The welding device according to claim 12, characterized in that The two fourth fixing components (114) are further used to move away from each other along the width direction (Y) of the battery (20) to loosen the battery (20).

14. The welding device according to any one of claims 11 to 13, characterized in that The two fourth fixing components (114) move synchronously.

15. The welding device according to any one of claims 1 to 14, characterized in that The battery (20) comprises an end plate (22) perpendicular to the length direction (X) of the battery (20) and a side plate (23) perpendicular to the width direction (Y) of the battery (20), and the welding head (122) is used to perform laser wire welding on the end plate (22) and the side plate (23).

16. A battery production line, characterized in that: include: An assembly device for assembling a battery (20), wherein the assembled battery (20) comprises two end plates (22) and a plurality of battery cells (21) arranged along a length direction (X) of the battery (20), wherein the two end plates (22) are respectively located at two ends of the plurality of battery cells (21) along the length direction (X) of the battery (20); Welding equipment, the welding equipment being the welding equipment according to any one of claims 1 to 15, the welding equipment being used for performing laser wire welding on the assembled battery (20); The assembly equipment is also used to accommodate the welded battery (20) in a box.

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