Briquetting assembly and welding device

Abstract

The utility model discloses a briquetting assembly and welding device relates to welding technical field, aims at solving how to reduce the problem of welding oxidation and welding slag splashing. The briquetting assembly includes briquetting body and air inlet pipeline. The briquetting body is used for pressing the pole ear on the cover plate when welding the pole ear and the cover plate of the power battery. The welding channel along the first direction and the air inlet channel along the second direction are equipped in the briquetting body, and the first direction and the second direction intersect. The welding channel is communicated with the air inlet channel, and the welding channel is used for setting welding equipment, so that the welding equipment welds the pole ear and the cover plate. Part of the air inlet pipeline is located in the air inlet channel, and can move in the air inlet channel, and is used for passing into the air inlet channel and passing into the protective gas.

Description

Technical Field

[0001] This application relates to the field of welding technology, and more particularly to briquetting assemblies and welding apparatus. Background Technology

[0002] Welding equipment is used to weld workpieces, such as the tabs and cover plates of a power battery. The welding equipment includes a clamping assembly and welding equipment. The clamping assembly is used to press the battery tabs and cover plates together, and the welding equipment is used to weld the pressed battery tabs and cover plates. When welding the tabs and cover plates, a protective gas is usually introduced into the welding area to prevent oxidation and improve the welding effect.

[0003] In the prior art, because the welding equipment is moving during the welding of the electrode tab and the cover plate, the welding position is changing. As the welding position changes, the flow and distribution of the shielding gas at the corresponding welding position are uneven, which can easily cause welding oxidation and slag spatter. Utility Model Content

[0004] The purpose of this application is to provide a briquetting assembly and a welding device, which aims to solve the problems of reducing welding oxidation and weld spatter.

[0005] In a first aspect, a pressing assembly is provided, comprising a pressing body and an air intake pipe. The pressing body is used to press the tabs onto the cover plate during welding of the electrode tabs and the cover plate of a power battery. The pressing body has a welding channel extending in a first direction and an air intake channel extending in a second direction, the first and second directions intersecting. The welding channel communicates with the air intake channel and is used for passing welding equipment to weld the electrode tabs and the cover plate. A portion of the air intake pipe is located within the air intake channel and is movable within the air intake channel for introducing protective gas into the air intake channel.

[0006] In this way, the clamping block can firmly press the battery's tabs and cover plate, ensuring the welding effect at the connection between the tabs and cover plate. The welding channel can guide the welding equipment, preventing welding position deviation and improving welding consistency. By connecting the welding channel with the air intake channel, part of the air intake pipe is located within the air intake channel and can move within it. During the welding of the battery's tabs and cover plate, the air intake pipe can move with the welding equipment, ensuring that the protective gas discharged from the air intake pipe is always sprayed at the welding position of the tabs and cover plate. This avoids high concentrations of protective gas at the welding position, resulting in relatively uniform flow and distribution, reducing oxidation and weld spatter during welding, and improving the welding effect at the connection between the tabs and cover plate. In addition, by arranging the welding channel and the air intake channel in a cross pattern, this layout is reasonable, making the structure of the clamping block assembly more compact and suitable for the limited internal space of the battery. At the same time, the protective gas can be directly delivered to the welding area through the air intake channel, synchronized with the welding action, making the protective gas coverage more concentrated and reducing waste.

[0007] In some embodiments, the pressure block assembly further includes a power assembly, which is drivenly connected to the intake pipe and is used to drive the intake pipe to move within the intake passage.

[0008] In some embodiments, the power assembly includes a drive member and a transmission structure, the transmission structure being connected between the drive member and the intake pipe, the drive member driving the intake pipe to move within the intake passage via the transmission structure.

[0009] In some embodiments, the transmission structure includes a rotating component and a translating component, a driving component connected to the rotating component for driving the rotating component to rotate, the rotating component and the translating component engaging in a transmission relationship to drive the translating component to move axially along the intake pipe, and the intake pipe being connected to the translating component.

[0010] In some embodiments, the transmission structure includes a lead screw and a slider, the slider having a threaded hole, the lead screw passing through the threaded hole, and the threaded hole being threadedly connected. One of the lead screw and the slider is a rotating component, and the other of the lead screw and the slider is a translating component.

[0011] In some embodiments, the pressure block assembly further includes a connecting structure that connects the translation member and the air intake pipe.

[0012] In some embodiments, the connection structure includes a limiting member and a connecting member. The limiting member has a connecting hole, through which an air intake pipe passes and is connected to the limiting member. The connecting member connects the limiting member and the translational member.

[0013] In some embodiments, the limiting member is provided with a first limiting groove, which is recessed from the outer surface and inner surface of the limiting member. A portion of the connecting member is disposed within the first limiting groove.

[0014] In some embodiments, the first limiting groove extends circumferentially along the intake pipe. The connector includes an arcuate portion and a rod-shaped portion connected to the arcuate portion, the rod-shaped portion being connected to the translation member, the arcuate portion extending circumferentially along the intake pipe and disposed within the first limiting groove.

[0015] In some embodiments, the limiting member further includes a second limiting groove, which is recessed from the inner surface of the limiting member toward the outer surface. The outer circumferential surface of the intake pipe has a protrusion located within the second limiting groove.

[0016] In some embodiments, both the second limiting groove and the protrusion extend circumferentially along the intake duct.

[0017] In some embodiments, the maximum radial dimension of the limiting member in the connecting hole is greater than the radial dimension of the air intake channel.

[0018] In some embodiments, the air intake pipe includes an air intake end and an air outlet end. The air intake end is adapted to be connected to an external air source, and the air outlet end is located inside the air intake channel. The end face of the air outlet end is a slope, which is adapted to face the electrode tab.

[0019] In some embodiments, the angle between the inclined plane and the axis of the intake duct is greater than or equal to 30° and less than or equal to 60°.

[0020] In some embodiments, the pressure block assembly further includes a seal disposed between the inner wall surface of the air intake passage and the air intake pipe.

[0021] In some embodiments, the seal is a flexible sealing ring.

[0022] Secondly, a welding apparatus is also provided, including a pressing assembly as described in any of the above technical solutions.

[0023] In some embodiments, along the extending direction of the welding channel of the pressing body in the pressing assembly, the pressing body includes a first end and a second end, and an air inlet channel of the pressing body is disposed at the first end. The welding apparatus further includes a dust removal assembly connected to the second end and communicating with the welding channel.

[0024] Since the welding apparatus provided in this application includes the pressing block assembly as described in any of the above technical solutions, it can solve the same technical problem and achieve the same effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This application provides a schematic diagram of the structure of a welding apparatus according to some embodiments;

[0027] Figure 2 This application provides a schematic diagram of the structure of a briquetting assembly according to some embodiments;

[0028] Figure 3 for Figure 2 A partial cross-sectional view of the pressing block assembly shown;

[0029] Figure 4 for Figure 2 The diagram shows the structure of the limiting component in the pressure block assembly.

[0030] Figure 5 for Figure 2 The diagram shows the structure of the connector in the pressing block assembly.

[0031] Figure 6 for Figure 2 The diagram shows the structure of the air intake pipe in the briquetting assembly.

[0032] Figure 7 This is a schematic diagram of the structure when the angle θ1 between the inclined plane and the axis of the intake pipe is 30°.

[0033] Figure 8 This is a schematic diagram of the structure when the angle θ2 between the inclined plane and the axis of the intake pipe is 45°.

[0034] Figure 9 This is a schematic diagram of the structure when the angle θ3 between the inclined plane and the axis of the intake pipe is 60°.

[0035] Figure 10 Control flowchart for the movement of the intake duct;

[0036] Figure 11 A schematic diagram of the intake pipe in the first position A1;

[0037] Figure 12 This is a schematic diagram of the intake pipe in the second position, A2.

[0038] Figure label:

[0039] 100. Welding equipment; 10. Briquetting assembly; 20. Dust removal assembly;

[0040] 1. Compression block body; 11. Welding channel; 12. Air intake channel; 13. First end; 14. Second end;

[0041] 2. Intake pipe; 21. Protrusion; 22. Intake end; 23. Exit end;

[0042] 3. Power assembly; 31. Drive component; 32. Transmission structure; 321. Rotating component; 3211. Lead screw; 322. Translation component; 3221. Slider;

[0043] 4. Connecting structure; 41. Limiting component; 411. Connecting hole; 412. First limiting groove; 413. Second limiting groove; 42. Connecting component; 421. Arc-shaped part; 422. Rod-shaped part;

[0044] 5. Sealing components; 51. Flexible sealing rings;

[0045] 6. Polar ears;

[0046] 7. Cover plate. Detailed Implementation

[0047] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0048] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0049] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0050] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0051] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a welding apparatus 100 provided in some embodiments of this application. Figure 2 This is a schematic diagram of the structure of a pressing assembly 10 provided in some embodiments of this application. The welding device 100 is used to weld workpieces, such as welding the tabs 6 and cover plate 7 of a power battery. Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials (such as plastics) by heating, high temperature, or high pressure. Welding methods can include laser welding, ultrasonic welding, argon arc welding, friction welding, submerged arc welding, gas welding, resistance welding, MIG welding, etc.

[0052] The welding apparatus 100 may include a pressing assembly 10 and welding equipment. The pressing assembly 10 is used to press the tabs 6 and cover plate 7 of the power battery, and the welding equipment is used to weld the pressed tabs 6 and cover plate 7 of the power battery. For example, the welding equipment may be a laser welder, an ultrasonic welder, a friction welder, etc.

[0053] This application uses a laser welder as an example to illustrate the process.

[0054] The briquetting assembly 10 may include a briquetting body 1 and an air inlet pipe 2. The briquetting body 1 is provided with an air inlet channel 12, which is connected to the welding positions of the tab 6 and the cover plate 7. The air inlet pipe 2 is used to provide protective gas to the air inlet channel 12, so that the protective gas flows to the welding positions of the tab 6 and the cover plate 7 to reduce welding oxidation and improve the welding effect.

[0055] In the prior art, the fixed position of the air inlet pipe 2 may not be adaptable to all types of workpieces and welding positions, resulting in poor flexibility and affecting the flow and distribution of shielding gas within the air inlet channel 12, causing welding oxidation. Furthermore, if the size or shape of the workpiece changes, it may be necessary to replace or adjust the pressure block assembly 10, thereby increasing the cost and complexity of the welding apparatus 100. Simultaneously, in complex welding positions or at special angles, sufficient shielding gas coverage may not be provided, affecting welding quality.

[0056] Based on this, this application provides a briquetting assembly 10, please refer to the following: Figure 1 and Figure 2 The pressing assembly 10 includes a pressing body 1 and an air inlet pipe 2. The pressing body 1 is used to press the tabs 6 onto the cover plate 7 when welding the power battery tabs 6 and the cover plate 7. The pressing body 1 has a section along a first direction (e.g., Figure 2 The welding channel 11 extends in direction A and along the second direction (e.g.) Figure 2 The intake channel 12 extends in direction B, and the first direction intersects with the second direction. The welding channel 11 communicates with the intake channel 12 and is used to pass through the welding equipment so that the welding equipment can weld the electrode lug 6 and the cover plate 7. A portion of the intake pipe 2 is located within the intake channel 12 and is movable within the intake channel 12 for introducing protective gas into the intake channel 12.

[0057] In this way, the clamping block 1 can press the battery tabs 6 and cover plate 7 tightly to ensure the welding effect at the connection between the tabs 6 and cover plate 7. For example, if there is a gap between the battery tabs 6 and cover plate 7, it will affect the welding effect between the tabs 6 and cover plate 7, which may lead to overcurrent resistance. During the charging and discharging process, the connection between the tabs 6 and cover plate 7 will heat up, which may damage the battery. In addition, a gap between the tabs 6 and cover plate 7 will affect the mechanical strength of the connection between the tabs 6 and cover plate 7, preventing the battery from losing power due to vibration.

[0058] The welding channel 11 guides the welding equipment, preventing welding position deviation and improving welding consistency. By connecting the welding channel 11 to the air intake channel 12, a portion of the air intake pipe 2 is located within the air intake channel 12 and can move within it. During the welding of the battery's tabs 6 and cover plate 7, the air intake pipe 2 moves with the welding equipment, ensuring that the protective gas discharged from the air intake pipe 2 is always sprayed onto the welding position of the tabs 6 and cover plate 7. This avoids high concentrations of protective gas at the welding position, ensuring relatively uniform flow and distribution, reducing oxidation and slag spatter during welding, and improving the welding effect at the connection between the tabs 6 and cover plate 7. Furthermore, the cross arrangement of the welding channel 11 and air intake channel 12 is reasonable, making the structure of the pressure assembly 10 more compact and suitable for the limited internal space of the battery. Simultaneously, the protective gas can be directly delivered to the welding area through the air intake channel 12, synchronized with the welding action, resulting in more concentrated protective gas coverage and reduced waste.

[0059] In some examples, the protective gas can be nitrogen. In other examples, the protective gas can also be argon, carbon dioxide, helium, hydrogen, etc.

[0060] In some examples, the first direction A and the second direction B may intersect perpendicularly. In other examples, the first direction A and the second direction B may intersect at an angle.

[0061] This application uses the example of a first direction A and a second direction B intersecting perpendicularly as an example for illustrative purposes.

[0062] In some embodiments, the pressure block assembly 10 further includes a power assembly 3, which is connected to the intake pipe 2 for driving the intake pipe 2 to move within the intake channel 12.

[0063] In this way, by driving the air intake pipe 2 to move within the air intake channel 12 through the power component 3, the air intake pipe 2 can flexibly adjust the input position of the protective gas within the air intake channel 12 according to the change in the position of the welding channel 11, thereby optimizing the flow and distribution of the protective gas within the air intake channel 12, reducing oxidation and spatter during the welding process, and improving the welding effect at the connection between the electrode tab 6 and the cover plate 7.

[0064] In some examples, the power component 3 can be a linear guide, a pneumatic slide, an electric actuator, etc.

[0065] In some examples, the power assembly 3 may be located on one side of the intake duct 2 along a second direction. In other examples, the power assembly 3 may also be located on one side of the intake duct 2 along a first direction.

[0066] In some embodiments, the power assembly 3 includes a drive member 31 and a transmission structure 32. The transmission structure 32 is connected between the drive member 31 and the intake pipe 2. The drive member 31 drives the intake pipe 2 to move within the intake channel 12 through the transmission structure 32.

[0067] In this way, compared to the drive component 31 being directly connected to the intake pipe 2, the drive component 31 is connected to the intake pipe 2 through the transmission structure 32, so that the power of the drive component 31 is transmitted to the intake pipe 2 more reasonably, and the movement of the intake pipe 2 within the intake channel 12 is more stable.

[0068] In some examples, the drive unit 31 can be a linear motor, a linear cylinder, etc.

[0069] In some examples, the transmission structure 32 can be a lead screw and slider structure, a synchronous belt and synchronous pulley structure, a sprocket and chain structure, a gear and rack structure, a pulley structure, etc.

[0070] In some embodiments, the transmission structure 32 includes a rotating member 321 and a translating member 322. A driving member 31 is connected to the rotating member 321 and is used to drive the rotating member 321 to rotate. The rotating member 321 and the translating member 322 are in a transmission cooperation to drive the translating member 322 to move along the axial direction of the air intake pipe 2. The air intake pipe 2 is connected to the translating member 322.

[0071] In this way, by connecting the driving component 31 to the rotating component 321, and the rotating component 321 to the translating component 322 through a transmission engagement, and connecting the intake pipe 2 to the translating component 322, the power output by the driving component 31 is transmitted to the translating component 322 through the rotating component 321, thereby driving the translating component 322 to move axially along the intake pipe 2. The transmission structure 32 facilitates the spatial arrangement of the driving component 31 and the intake pipe 2, making their arrangement more rational.

[0072] In some examples, the rotating component 321 can be a lead screw 3211, and the translating component 322 can be a slider 3221. Alternatively, the rotating component 321 can be a gear, and the translating component 322 can be a rack, etc.

[0073] In some examples, the drive unit 31 can be a servo motor.

[0074] In some embodiments, the transmission structure 32 includes a lead screw 3211 and a slider 3221. The slider 3221 has a threaded hole, and the lead screw 3211 passes through the threaded hole and is threadedly connected to it. One of the lead screw 3211 and the slider 3221 is a rotating member 321, and the other of the lead screw 3211 and the slider 3221 is a translating member 322.

[0075] In this way, the power of the drive component 31 is transmitted to the intake pipe 2 through the cooperation of the lead screw 3211 and the slider 3221, thereby improving the power transmission efficiency and ensuring the stability of power transmission.

[0076] In some examples, the lead screw can be a ball screw.

[0077] In some examples, the lead screw 3211 can be a rotating component 321, and the slider 3221 can be a translating component 322. In other examples, the slider 3221 can be a rotating component 321, and the lead screw 3211 can be a translating component 322.

[0078] This application uses the example of a lead screw 3211 being a rotating component 321 and a slider 3221 being a translating component 322 for illustrative purposes.

[0079] In some embodiments, the pressure block assembly 10 further includes a connecting structure 4, which is connected between the translation member 322 and the air intake pipe 2.

[0080] In this way, by setting the connecting structure 4, the translation component 322 and the air intake pipe 2 can be easily connected, thereby facilitating the movement of the air intake pipe 2 within the air intake channel 12.

[0081] In some examples, the translation component 322, the connecting structure 4, and the intake pipe 2 can be connected by fasteners such as bolts, welding, snap-fitting, riveting, etc.

[0082] In some other embodiments, a screw can be welded onto the intake pipe 2, and a through hole is provided on the translation member 322. The intake pipe 2 is directly connected to the intake pipe 2 by the screw passing through the through hole on the translation member 322.

[0083] In some embodiments, please refer to Figures 3 to 5 , Figure 3 for Figure 2 A partial cross-sectional view of the pressing block assembly 10 shown. Figure 4 for Figure 2 The diagram shows the structure of the limiting member 41 in the pressing block assembly 10. Figure 5 for Figure 2 The diagram shows the structure of the connector 42 in the pressure block assembly 10. The connecting structure 4 includes a limiting member 41 and a connector 42. The limiting member 41 has a connecting hole 411, through which the air intake pipe 2 passes and is connected to the limiting member 41. The connector 42 connects the limiting member 41 and the translation member 322.

[0084] In this way, by providing a connecting hole 411 on the limiting member 41, and connecting member 42 connecting between the limiting member 41 and the translation member 322, the limiting member 41 and the air intake pipe 2 can be easily connected.

[0085] In some examples, the connection hole 411 and the intake pipe 2 can be fitted by interference fit, welding, screw connection, etc.

[0086] In some examples, the limiting member 41 and the connecting member 42 can be cylindrical, plate, rod, block, strip, etc., and this application does not make specific limitations on them.

[0087] In some embodiments, the limiting member 41 is provided with a first limiting groove 412, which is recessed from the outer surface and inner surface of the limiting member 41. A portion of the connecting member 42 is disposed within the first limiting groove 412.

[0088] In this way, when assembling the limiting member 41 and the connecting member 42, the first limiting groove 412 can limit and guide the connecting member 42, thereby facilitating the assembly of the limiting member 41 and the connecting member 42 and improving assembly efficiency. By placing a portion of the connecting member 42 within the first limiting groove 412, the connecting member 42 can be easily disassembled from the limiting member 41.

[0089] In some embodiments, the first limiting groove 412 extends circumferentially along the intake pipe 2. For example, the first limiting groove 412 may extend circumferentially around the intake pipe 2, that is, the first limiting groove 412 is an annular groove.

[0090] The connector 42 includes an arc-shaped portion 421 and a rod-shaped portion 422 connected to the arc-shaped portion 421. The rod-shaped portion 422 is connected to the translation member 322. The arc-shaped portion 421 extends circumferentially along the intake pipe 2 and is disposed within the first limiting groove 412. For example, the shape of the arc-shaped portion 421 matches the shape of the first limiting groove 412.

[0091] In this way, through the cooperation of the arc-shaped portion 421 and the first limiting groove 412, the rod-shaped portion 422 is connected to the translation member 322 to avoid radial or axial displacement of the connecting member 42, so as to make the movement of the air intake pipe 2 within the air intake channel 12 more stable. Furthermore, the connecting member 42 can provide better clamping force for the movement of the air intake pipe 2, thereby facilitating the flexible adjustment of the input position of the protective gas within the air intake channel 12 according to the changes in the position of the welding channel 11.

[0092] In some examples, the arc-shaped portion 421 may be partially disposed within the first limiting groove 412. In other examples, the arc-shaped portion 421 may be entirely disposed within the first limiting groove 412.

[0093] In some other embodiments, the first limiting groove 412 can be multiple grooves, such as 2, 3, 4, etc., and the multiple grooves can be arranged at intervals along the circumference of the air intake pipe 2. In this case, the connector 42 can include multiple connecting rods, with one connecting rod engaging in one groove.

[0094] In some embodiments, please refer to Figure 3 and Figure 6 , Figure 6 for Figure 2 The diagram shows a portion of the intake pipe 2 in the pressure block assembly 10. The limiting member 41 also has a second limiting groove 413, which is recessed from the inner surface of the limiting member 41 towards the outer surface. A protrusion 21 is provided on the outer circumferential surface of the intake pipe 2, and the protrusion 21 is located within the second limiting groove 413.

[0095] In this way, when assembling the limiting member 41 with the air intake pipe 2, the second limiting groove 413 and the protrusion 21 can be used to facilitate the connection between the limiting member 41 and the air intake pipe 2, thereby improving the assembly efficiency.

[0096] In some other embodiments, the second limiting groove 413 can be multiple grooves, such as 2, 3, 4, etc., and the multiple grooves can be arranged at intervals along the circumference of the air intake pipe 2. In this case, the protrusion 21 can include multiple snap-fit ​​protrusions, with one snap-fit ​​protrusion snapping into one groove.

[0097] In some examples, the number of the second limiting groove 413 and the protrusion 21 can both be one. Alternatively, the number of the second limiting groove 413 and the protrusion 21 can both be multiple, such as two, three, four, etc. This application does not make a specific limitation on this.

[0098] In some embodiments, the second limiting groove 413 and the protrusion 21 both extend circumferentially along the intake pipe 2.

[0099] This improves the connection stability between the limiting member 41 and the intake pipe 2, making the movement of the intake pipe 2 within the intake channel 12 smoother.

[0100] In some other embodiments, the limiting member 41 and the air intake pipe 2 can be connected by welding, screwing, riveting or other methods.

[0101] In some embodiments, the maximum radial dimension L1 of the limiting member 41 in the connecting hole 411 is greater than the radial dimension L2 of the air intake channel 12.

[0102] In this way, after the intake pipe 2 has entered the intake channel 12 to a certain extent, the limiting member 41 can contact the pressure block body 1, so that the limiting member 41 prevents the intake pipe 2 from entering the intake channel 12 too much, which would cause the intake pipe 2 to collide with the inner wall of the intake channel 12.

[0103] In some other embodiments, the maximum radial dimension L1 of the limiting member 41 in the connecting hole 411 may be less than or equal to the radial dimension L2 of the air intake passage 12.

[0104] In some embodiments, the air intake pipe 2 includes an air intake end 22 and an air outlet end 23. The air intake end 22 is adapted to be connected to an external air source, and the air outlet end 23 is located inside the air intake channel 12. The end face of the air outlet end 23 is a slope, which is adapted to face the tab 6.

[0105] In this way, the air intake pipe 2 can provide a stable and uniform protective gas to the electrode tab 6, preventing oxidation and spatter generated during the welding process and improving the welding quality.

[0106] In some examples, the air inlet 22 can be connected to an external air source via a hose.

[0107] In some other embodiments, the end face of the air outlet 23 can be a plane.

[0108] Please see Figure 2 , Figures 7 to 9 , Figure 7 This is a schematic diagram of the structure when the angle θ1 between the inclined plane and the axis of the intake pipe 2 is 30°. Figure 8 This is a schematic diagram of the structure when the angle θ2 between the inclined plane and the axis of the intake pipe 2 is 45°. Figure 9 This is a schematic diagram showing the structure when the angle θ3 between the inclined plane and the axis of the intake pipe 2 is 60°. It can be seen that the angle between the inclined plane and the axis of the intake pipe 2 is directly proportional to the amount of shielding gas entering; that is, the smaller the angle, the less shielding gas enters, and the larger the angle, the more shielding gas enters. If the angle between the inclined plane and the axis of the intake pipe 2 is small, the shielding gas entering the intake channel 12 from the outlet end 23 of the intake pipe 2 diffuses excessively, which may not provide sufficient shielding gas coverage when welding complex positions or special angles, affecting the welding effect. If the angle between the inclined plane and the axis of the intake pipe 2 is large, the shielding gas entering the intake channel 12 from the outlet end 23 of the intake pipe 2 is overly concentrated.

[0109] In some embodiments, the angle between the inclined plane and the axis of the air intake pipe 2 can be greater than or equal to 30° and less than or equal to 60°. For example, the angle between the inclined plane and the axis of the air intake pipe 2 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. When the angle between the inclined plane and the axis of the air intake pipe 2 is within this range, the angle is moderate, and the protective gas input from the outlet end 23 of the air intake pipe 2 into the air intake channel 12 can evenly cover the welding channel 11 to ensure welding effectiveness.

[0110] In some embodiments, the pressure block assembly 10 may further include a seal 5, which is disposed between the inner wall surface of the air intake channel 12 and the air intake pipe 2.

[0111] In this way, by placing the sealing element 5 between the inner wall of the air intake channel 12 and the air intake pipe 2, the inner wall of the air intake channel 12 and the air intake pipe 2 can be sealed to prevent outside air from entering the air intake channel 12 during the movement of the air intake pipe 2, which could cause welding oxidation during the welding process and affect the welding effect. At the same time, it also prevents the leakage of protective gas.

[0112] In some embodiments, the seal 5 is a flexible sealing ring 51.

[0113] This reduces friction between the intake pipe 2 and the inner wall of the intake channel 12 during movement, preventing scratches on the intake pipe 2 and further damage to it, thereby extending the service life of the intake pipe 2.

[0114] In some examples, the flexible sealing ring 51 can be a high-temperature resistant rubber sealing ring.

[0115] In some embodiments, please continue reading Figure 1 and Figure 2 Along the extending direction of the welding channel 11 of the pressing body 1 in the pressing assembly 10, the pressing body 1 includes a first end 13 and a second end 14, and the air inlet channel 12 of the pressing body 1 is provided at the first end 13. The welding device 100 also includes a dust removal assembly 20, which is connected to the second end 14 and communicates with the welding channel 11.

[0116] In this way, during the welding of the tab 6 and the cover plate 7, the air intake channel 12 of the pressure block body 1 can continuously input protective gas to reduce welding oxidation, and the dust removal component can extract the welding slag generated during the welding process in real time to improve the welding effect.

[0117] In some examples, the dust collection component 20 can be a bag filter, a filter cartridge, etc., but this application does not specifically limit it.

[0118] The welding process of the electrode tab 6 and cover plate 7 of the power battery is described below.

[0119] For details, please refer to Figure 1 Before welding the tabs 6 and cover plate 7 of the power battery, it is necessary to ensure that the tabs 6 and cover plate 7 are in a pressed state. First, the tabs 6 and cover plate 7 are positioned using a fixture. After positioning, under the action of the power component, the pressing block body 1 applies a downward force to the tabs 6 and cover plate 7 in the second direction, so that the tabs 6 are pressed tightly onto the cover plate 7. At this time, the tabs 6 and cover plate 7 are in a pressed state.

[0120] Please see Figure 1 , Figure 2 , Figures 10 to 12 , Figure 10 The control flowchart for the movement of intake pipe 2. Figure 11 This is a schematic diagram of the intake pipe 2 in the first position A1. Figure 12 This is a schematic diagram of the intake pipe 2 in the second position A2. Then, based on the required overcurrent resistance and mechanical strength at the connection between the electrode 6 and the cover plate 7, the preset welding trajectory of the laser welder when moving from the first position A1 to the second position A2 can be determined. This allows for the calculation of the welding speed of the laser welder along the first direction when welding the electrode 6 and the cover plate 7. Here, the first position A1 is the initial position of the intake pipe 2, and the second position A2 is the final position of the intake pipe 2.

[0121] The welding speed of the laser welder is consistent with the moving speed of the air intake pipe 2 in the air intake channel 12. Thus, the moving speed of the air intake pipe 2 in the air intake channel 12 can be obtained, and this speed is input into the control program of the servo motor to realize the synchronous movement of the laser welder and the air intake pipe 2 along the first direction.

[0122] Next, the laser welder passes through the welding channel 11 and emits a laser to weld the tab 6 and the cover plate 7 in the welding area. The number of welding areas can be 2, or the number of welding areas can be other than 2, such as 1, 3, 5, etc. This application does not make a specific limitation, as long as the required overcurrent resistance and mechanical strength at the connection between the tab 6 and the cover plate 7 are guaranteed.

[0123] Finally, the intake pipe 2 adjusts the input position of the protective gas in the intake channel 12 synchronously according to the position change of the welding channel 11, so that the intake pipe 2 can provide a stable and uniform protective gas to the intake channel 12, covering the welding area and preventing oxidation and spatter generated during the welding process. At the same time, the dust removal component sucks up the welding slag generated during the welding process in real time to improve the welding effect at the connection between the electrode tab 6 and the cover plate 7.

[0124] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0125] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A briquetting assembly, characterized in that, include: A pressing block body (1) is used to press the tab (6) onto the cover plate (7) when welding the tab (6) and the cover plate (7) of the power battery; the pressing block body (1) is provided with a welding channel (11) extending in a first direction and an air intake channel (12) extending in a second direction, the first direction intersecting the second direction; the welding channel (11) is connected to the air intake channel (12), and the welding channel (11) is used to pass through welding equipment so that the welding equipment welds the tab (6) and the cover plate (7); An intake pipe (2) is located within the intake channel (12) and is movable within the intake channel (12) for introducing protective gas into the intake channel (12).

2. The briquetting assembly according to claim 1, characterized in that, It also includes a power assembly (3), which is connected to the intake pipe (2) for driving the intake pipe (2) to move within the intake channel (12).

3. The briquetting assembly according to claim 2, characterized in that, The power assembly (3) includes a drive element (31) and a transmission structure (32). The transmission structure (32) is connected between the drive element (31) and the air intake pipe (2). The drive element (31) drives the air intake pipe (2) to move within the air intake channel (12) through the transmission structure (32).

4. The briquetting assembly according to claim 3, characterized in that, The transmission structure (32) includes a rotating component (321) and a translating component (322). The driving component (31) is connected to the rotating component (321) and is used to drive the rotating component (321) to rotate. The rotating component (321) and the translating component (322) are in transmission cooperation to drive the translating component (322) to move along the axial direction of the air intake pipe (2). The air intake pipe (2) is connected to the translating component (322).

5. The briquetting assembly according to claim 4, characterized in that, The transmission structure (32) includes a lead screw (3211) and a slider (3221). The slider (3221) is provided with a threaded hole. The lead screw (3211) passes through the threaded hole and is threadedly connected to the threaded hole. One of the lead screw (3211) and the slider (3221) is the rotating component (321), and the other of the lead screw (3211) and the slider (3221) is the translating component (322).

6. The briquetting assembly according to claim 4, characterized in that, It also includes a connecting structure (4) that connects the translation member (322) and the air intake pipe (2).

7. The briquetting assembly according to claim 6, characterized in that, The connection structure (4) includes: A limiting member (41) is provided with a connecting hole (411), and the air intake pipe (2) passes through the connecting hole (411) and is connected to the limiting member (41). A connector (42) is connected between the limiting member (41) and the translation member (322).

8. The briquetting assembly according to claim 7, characterized in that, The limiting member (41) is provided with a first limiting groove (412), the first limiting groove (412) is recessed from the outer surface of the limiting member (41) toward the inner surface; part of the connecting member (42) is disposed in the first limiting groove (412).

9. The briquetting assembly according to claim 8, characterized in that, The first limiting groove (412) extends circumferentially along the air intake pipe (2); The connector (42) includes an arc-shaped portion (421) and a rod-shaped portion (422) connected to the arc-shaped portion (421). The rod-shaped portion is connected to the translation member (322). The arc-shaped portion (421) extends circumferentially along the air intake pipe (2) and is disposed in the first limiting groove (412).

10. The briquetting assembly according to claim 8, characterized in that, The limiting member (41) is further provided with a second limiting groove (413), the second limiting groove (413) being recessed from the inner surface of the limiting member (41) toward the outer surface; The outer circumferential surface of the air intake pipe (2) is provided with a protrusion (21), which is located in the second limiting groove (413).

11. The briquetting assembly according to claim 10, characterized in that, The second limiting groove (413) and the protrusion (21) both extend circumferentially along the air intake pipe (2).

12. The briquetting assembly according to claim 7, characterized in that, The maximum radial dimension of the limiting member (41) in the connecting hole (411) is greater than the radial dimension of the air intake channel (12).

13. The briquetting assembly according to any one of claims 1-12, characterized in that, The air intake pipe (2) includes an air intake end (22) and an air outlet end (23). The air intake end (22) is adapted to connect to an external air source. The air outlet end (23) is located inside the air intake channel (12). The end face of the air outlet end (23) is a slope, which is adapted to face the tab (6).

14. The briquetting assembly according to claim 13, characterized in that, The angle between the inclined plane and the axis of the air intake pipe (2) is greater than or equal to 30° and less than or equal to 60°.

15. The briquetting assembly according to any one of claims 1-12, characterized in that, It also includes a sealing element (5), which is disposed between the inner wall of the air intake channel (12) and the air intake pipe (2).

16. The briquetting assembly according to claim 15, characterized in that, The sealing element (5) is a flexible sealing ring (51).

17. A welding apparatus, characterized in that, The briquetting assembly includes any one of claims 1-16.

18. The welding apparatus according to claim 17, characterized in that, Along the extension direction of the welding channel (11) of the pressing body (1) in the pressing assembly, the pressing body (1) includes a first end (13) and a second end (14), and the air inlet channel (12) of the pressing body (1) is provided at the first end (13). The welding device further includes a dust removal component (20), which is connected to the second end (14) and communicates with the welding channel (11).

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