Pressing mechanism and tab welding device

Abstract

The utility model discloses a pressing mechanism and a tab welding device. The pressing mechanism comprises a support, a first driving assembly arranged on the support and a pressing assembly connected to the driving end of the first driving assembly. The first driving assembly is configured to drive the pressing assembly to move relative to the support. The pressing assembly comprises a pressing head and a supporting plate which are oppositely arranged, a containing space used for containing a to-be-welded electrode lug is formed between the pressing head and the supporting plate, and the pressing head is configured to move in the direction close to the supporting plate so that the electrode lug located in the containing space can be pressed on the supporting plate tightly before the electrode lug is welded. By means of the electrode lug pressing device, the technical problem that when the electrode lug is pressed, due to the fact that the back of the to-be-welded area of the electrode lug is hollow, the electrode lug is likely to be extruded and deformed, and the welding effect is affected is solved, it is guaranteed that the electrode lug is pressed in place during welding, the electrode lug is prevented from being extruded and deformed, and therefore the welding quality is improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery production equipment technology, and in particular to a clamping mechanism and a tab welding device. Background Technology

[0002] As an important branch of lithium batteries, pouch batteries are widely used in new energy vehicles, 3C products, energy storage and other fields due to their advantages such as good safety performance, light weight, large battery capacity and good cycle performance.

[0003] In the production process of pouch lithium battery modules, after stacking the pouch cells, the tabs of adjacent cells need to be welded together to connect them in series. Before welding, the tabs to be welded need to be bent into an L-shape, creating a partial overlap between adjacent tabs, which becomes the area to be welded later. Before welding the overlapping area, a pressure head is used to press the tabs in the overlapping area. Because the back of the L-shaped tab to be welded area is hollow, existing pressing mechanisms, such as those mentioned in Chinese Utility Model Patent No. CN21209483U, which use a pressing component on the side of the pressure head to press the tabs to be welded, may deform the tabs or fail to press them in place, thus affecting the welding effect. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a clamping mechanism and a tab welding device to solve the technical problem that, when clamping the tab, the back of the area to be welded is hollow, which may squeeze and deform the tab, thereby affecting the welding effect.

[0005] In a first aspect, this application provides a clamping mechanism for clamping the electrode tab when welding a bent electrode tab. The clamping mechanism includes a bracket, a first drive assembly disposed on the bracket, and a clamping assembly connected to the drive end of the first drive assembly.

[0006] The first drive component is configured to drive the clamping component to move relative to the bracket;

[0007] The clamping assembly includes a clamping head and a support plate disposed opposite to each other, with a receiving space formed between the clamping head and the support plate for accommodating the tab to be welded. The clamping head is configured to move in a direction close to the support plate to clamp the tab located in the receiving space onto the support plate before welding the tab.

[0008] By using the pressure head and support plate together, the electrode tabs are pressed and supported from both opposite sides of the tabs to be welded. This ensures that the electrode tabs are pressed in place during welding and prevents them from being squeezed and deformed, thereby improving the welding quality.

[0009] Optionally, when the pressure head and the support plate are not pressed together, a first opening is formed between the pressure head and the support plate, and the first driving component drives the pressing component to move in a preset direction so that the electrode tab enters the receiving space through the first opening.

[0010] A first opening is formed between the pressure head and the support plate so that the electrode tab to be welded can enter the receiving space between the pressure head and the support plate through the first opening.

[0011] Optionally, the clamping assembly also includes:

[0012] The first mounting base, the support plate is rotatably mounted on the first mounting base;

[0013] The first elastic element has two ends connected to the support plate and the first mounting base, respectively. The first elastic element is configured to provide elastic force in the direction of the pressure head when the support plate rotates relative to the first mounting base, so that the support plate presses the electrode tab to be welded in the direction of the pressure head. The number of the first elastic elements includes at least two, and the at least two first elastic elements are respectively disposed on both sides of the support plate.

[0014] On the one hand, by setting the support plate to be rotatably mounted on the first mounting base, the support plate can rotate when the pressure head and the support plate are pressed together, so as to improve the pressing effect. On the other hand, by setting the first elastic element between the support plate and the first mounting base, the first elastic element provides elastic force in the direction of the pressure head when the support plate rotates, ensuring a more reliable pressing and providing a restoring force to the support plate.

[0015] Optionally, the clamping assembly also includes:

[0016] The second mounting base has a pressure head that is elastically mounted on it and is configured to move relative to the second mounting base in a direction that is closer to or farther from it.

[0017] The second elastic element has at least one end abutting against the pressure head. The second elastic element is configured to provide elastic force toward the support plate when the pressure head moves in a direction away from the second mounting base, so that the pressure head presses the electrode tab to be welded toward the support plate. The number of the second elastic elements includes at least two, and the at least two second elastic elements are respectively disposed on both sides of the pressure head.

[0018] By setting a second elastic element to abut against the pressure head, the second elastic element provides elastic force toward the support plate when the pressure head moves away from the second mounting base, so that the pressure head presses the electrode tab to be welded toward the support plate, ensuring a more secure press.

[0019] Optionally, the clamping assembly may also include a second drive assembly, which includes a slide rail, a first slider disposed on the slide rail, a second slider, and a first drive member;

[0020] The support plate is mounted on the first slider, and the pressure head is mounted on the second slider;

[0021] The driving end of the first driving member is connected to the support plate and is configured to drive the first slider and the second slider to move the support plate and the pressure head in a direction that moves closer to or further away from each other.

[0022] By adding a second driving assembly including a first slider, a second slider, and a first driving component, the pressure head and the support plate can move in directions that are closer to or further away from each other, so that the pressure head and the support plate can smoothly press or release the electrode tabs to be welded.

[0023] Optionally, the clamping assembly also includes a third drive assembly, which includes a second drive member, a guide rod, and a third elastic member. The pressure head and the support plate are both slidably mounted on the guide rod. The drive end of the second drive member is connected to the support plate and is configured to drive the support plate and the pressure head to move closer and further apart along the guide rod.

[0024] The third elastic element is mounted on the guide rod and is drivenly connected to the support plate or the pressure head. The third elastic element is configured to provide clamping force when the support plate is close to the pressure head.

[0025] By adding a third drive assembly including a second drive member and a guide rod, the pressure head and support plate can move smoothly in directions that are close to or far from each other, thereby allowing the pressure head and support plate to press or release the electrode tabs to be welded. Furthermore, by adding a third elastic member, a more secure pressing is ensured, while providing elasticity when the pressure head resets.

[0026] Optionally, a slit is formed inside the pressure head to allow the laser to pass through, and the laser emitted by the laser welder shines through the slit onto the clamped electrode tab to weld the electrode tab.

[0027] By creating a slit in the pressure head to allow the laser to pass through, the tabs are pressed tightly around the perimeter, and the laser is used to weld the pressed tabs.

[0028] Optionally, a cavity is formed inside the pressure head, and a second opening is provided on the side of the pressure head facing the support plate. The cavity communicates with the outside of the pressure head through the second opening.

[0029] The clamping mechanism also includes a dust suction component, the dust suction port of which faces the pressure head and is connected to the cavity.

[0030] By adding a dust extraction component, the fumes generated during the welding process can be removed, as well as metal particles and impurities in the welding area can be sucked away, ensuring welding quality and preventing impurities from affecting the welding effect.

[0031] Optionally, the first driving component includes:

[0032] The third driving element is configured to drive the clamping assembly to move along a first direction; and / or,

[0033] The fourth driving element is configured to drive the clamping assembly to move along the second direction; and / or,

[0034] The fifth driving component is configured to drive the clamping assembly to move in a third direction.

[0035] By setting the first drive component, the clamping component can move in multiple directions, ensuring that the clamping component can move to a predetermined position (such as the working position), thereby improving the clamping effect.

[0036] In a second aspect, this application provides an electrode welding apparatus, the electrode welding apparatus comprising a frame, a laser welder disposed on one side of the frame, a conveying mechanism disposed on the frame, a position adjustment mechanism, and a plurality of clamping mechanisms as described in any of the first aspects;

[0037] The conveying mechanism is configured to transport the battery cell modules to be welded to each welding station;

[0038] Multiple clamping mechanisms are installed on the sides of each welding station and are configured to clamp the tabs of the battery cell modules to be welded at each welding station.

[0039] The laser welder is configured to weld the tabs of the battery cell modules to be welded at each welding station;

[0040] At least one welding station is provided with a position adjustment mechanism below it, which is configured to adjust the orientation of the corresponding battery cell module to be welded.

[0041] In this embodiment, by setting a clamping mechanism in the electrode welding device, the electrode is ensured to be clamped in place during welding and the electrode is prevented from being squeezed and deformed, thereby improving the welding quality; the orientation of the corresponding battery cell module to be welded is adjusted by the position adjustment mechanism so that the electrode on different sides of the battery cell module to be welded can be welded.

[0042] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0043] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0044] Figure 1This is a schematic diagram of the clamping mechanism in one embodiment of this application from one view.

[0045] Figure 2 This is a schematic diagram of the clamping mechanism in one embodiment of this application from another view.

[0046] Figure 3 This is a schematic diagram of the clamping mechanism in one embodiment of this application from another view.

[0047] Figure 4 This is a schematic diagram of the clamping assembly in one embodiment of this application;

[0048] Figure 5 This is a schematic diagram of the clamping assembly in another embodiment of this application;

[0049] Figure 6 This is a schematic diagram of a partial burst of the clamping component in one embodiment of this application;

[0050] Figure 7 This is a schematic diagram of the clamping assembly from another viewpoint in one embodiment of this application;

[0051] Figure 8 This is a schematic diagram of the electrode welding device in one embodiment of this application.

[0052] Explanation of reference numerals in the attached figures:

[0053] 100, bracket; 200, first drive assembly; 210, third drive component; 220, fourth drive component; 221, first guide rail; 222, third slider; 231, second guide rail; 232, fourth slider; 300, clamping assembly; 310, pressure head; 311, connecting part; 312, gap; 313, cavity; 314, second opening; 320, support plate; 321, bottom; 330, receiving space; 331, first opening; 340, first mounting base; 341, protruding structure; 342, connecting hole; 350, first elastic element; 360, second... Mounting base; 361, mounting slot; 370, second elastic element; 380, second drive assembly; 381, slide rail; 382, ​​first slider; 383, second slider; 384, first drive element; 390, third drive assembly; 391, second drive element; 392, guide rod; 393, third elastic element; 400, dust collection assembly; 410, housing; 411, dust collection port; 420, fitting; 1000, frame; 2000, laser welder; 3000, conveying mechanism; 4000, position adjustment mechanism; 5000, clamping mechanism; 6000, welding station. Detailed Implementation

[0054] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0055] As described in the background art, when the clamping mechanism in the prior art clamps the electrode tab to be welded, the back of the L-shaped electrode tab to be welded area is hollow. Therefore, when clamping the electrode tab, the electrode tab may be squeezed and deformed or not squeezed in place, which will affect the welding effect.

[0056] To address the aforementioned issues, this application proposes a novel clamping mechanism and a tab welding device for clamping the tabs during welding after bending. In practice, the clamping head and support plate work together to clamp and support the tabs from opposite sides of the tabs to be welded. This ensures that the tabs are clamped in place during welding and prevents them from being squeezed and deformed, thereby improving the welding quality.

[0057] The present application will be described in detail below through specific embodiments.

[0058] Reference Figures 1 to 3 As shown, the clamping mechanism provided in this embodiment includes at least a bracket 100, a first drive assembly 200, and a clamping assembly 300. The first drive assembly 200 is disposed on the bracket 100, and the clamping assembly 300 is connected to the drive end of the first drive assembly 200. The first drive assembly 200 is configured to drive the clamping assembly 300 to move relative to the bracket 100, so that the clamping assembly can move to a predetermined position (such as a working position). Further reference... Figures 1 to 3 As shown, the clamping assembly 300 includes a clamping head 310 and a support plate 320, which are disposed opposite to each other, and a receiving space 330 is formed between the clamping head 310 and the support plate 320 for accommodating the electrode tab to be welded. Further, the clamping head 310 and the support plate 320 are configured to move in directions that are close to or far from each other, so that when welding the electrode tab to be welded, the clamping head 310 moves in a direction close to the support plate 320 to clamp the electrode tab located in the receiving space 330 onto the support plate 320 before welding, and after welding, the clamping head 310 moves in a direction away from the support plate 320 to release the electrode tab.

[0059] Reference Figure 4 As shown, when the pressure head 310 and the support plate 320 are not pressed together, a first opening 331 is formed between the pressure head 310 and the support plate 320, and the receiving space 330 communicates with the external space through the first opening 331. The first driving component 200 can drive the pressing component 300 to move in a preset direction so that the electrode tab enters the receiving space 330 through the first opening 331.

[0060] In some embodiments, a first opening 331 is provided at the top of the pressure head 310 and the support plate 320, such as... Figure 4 As shown, the first driving component 200 drives the pressing component 300 to move upward, so that the electrode tab enters the receiving space 330 between the pressing head 310 and the support plate 320.

[0061] In other embodiments, the first opening 331 is provided at the bottom of the pressure head 310 and the support plate 320, and the first driving component 200 drives the pressing component 300 to move downward, so that the tab enters the receiving space 330 between the pressure head 310 and the support plate 320.

[0062] In other embodiments, the first opening 331 is located on one side of the pressure head 310 and the support plate 320, such as... Figure 5 As shown, the first drive assembly 200 drives the pressing assembly 300 to move laterally (such as translation), so that the tab enters the receiving space 330 between the pressing head 310 and the support plate 320.

[0063] It should be noted that the above-mentioned location of the first opening 331 is only an example and not a limiting description. Without departing from the inventive concept of this application, the first opening 331 can also be located at other positions relative to the pressure head 310 and the support plate 320, which will not be listed here.

[0064] Further reference Figure 4 As shown, in some embodiments, the clamping assembly 300 further includes a first mounting base 340 and a first elastic member 350. A support plate 320 is rotatably mounted on the first mounting base 340, and both ends of the first elastic member 350 are connected to the support plate 320 and the first mounting base 340, respectively. Specifically, the edge of the first mounting base 340 near the pressure head 310 extends upward to form a protrusion 341, and both ends of the first elastic member 350 are connected to the bottom of the support plate 320 and the protrusion 341, respectively. The first elastic member 350 is configured to provide a spring force toward the pressure head 310 when the support plate 320 rotates relative to the first mounting base 340, so that the support plate 320 presses the electrode to be welded toward the pressure head 310 to ensure a more secure clamping and to provide a restoring force to the support plate 320.

[0065] Reference Figure 6As shown, in some embodiments, the bottom 321 of the support plate 320 is cylindrical, and the first mounting base 340 is provided with a connecting hole 342. The bottom 321 of the support plate 320 is installed in the connecting hole 342, so that the support plate 320 can rotate relative to the first mounting base 340 under the action of external force. In other embodiments, the bottom of the support plate 320 is provided with a connector (not shown). The connector is cylindrical, and the first mounting base 340 is provided with a connecting hole. The support plate 320 is installed in the connecting hole through the connector, so that the support plate 320 can rotate relative to the first mounting base 340 under the action of external force.

[0066] Understandably, the support plate 320 can rotate clockwise or counterclockwise relative to the first mounting base 340 under the action of external force. In order to ensure that the support plate 320 receives elastic force towards the pressure head 310 regardless of whether it rotates clockwise or counterclockwise relative to the first mounting base 340, in this embodiment of the application, the number of first elastic elements 350 includes at least two. The at least two first elastic elements 350 are respectively disposed on both sides of the support plate 320, so that the support plate 320 receives elastic force towards the pressure head 310 when it rotates clockwise or counterclockwise relative to the first mounting base 340, so that the support plate 320 presses the electrode tab to be welded towards the pressure head 310.

[0067] In some embodiments, the first elastic element 350 may be a tension spring. It should be noted that, in addition to a tension spring, the first elastic element 350 may also be other components capable of providing elastic force, such as a spring or a cylinder. It is understood that when the first elastic element 350 is a spring or a cylinder, the relative positions of the first elastic element 350 with the pressure head 310 and the support plate 320 can be adaptively adjusted, which will not be elaborated further here.

[0068] Further reference Figure 4 As shown, in some embodiments, the clamping assembly 300 further includes a second mounting base 360 ​​and a second elastic member 370. The clamping head 310 is elastically mounted on the second mounting base 360 ​​and configured to move relative to the second mounting base 360 ​​in a direction approaching or away from the second mounting base 360. At least one end of the second elastic member 370 abuts against the clamping head 310 and is configured to provide a spring force toward the support plate 320 when the clamping head 310 moves in a direction away from the second mounting base 360, thereby pressing the electrode tab to be welded toward the support plate 320 to ensure a more secure clamping.

[0069] Further reference Figure 4As shown, in some embodiments, the number of second elastic members 370 includes at least two, and at least two second elastic members 370 are respectively disposed on both sides of the pressure head 310. Connecting portions 311 extend outward from both sides of the pressure head 310. A mounting groove 361 is provided on the second mounting base 360, and the main body of the pressure head 310 is disposed in the mounting groove 361. The connecting portions 311 on both sides of the pressure head 310 are connected to the second mounting base 360. As an exemplary and not limiting description, the connecting portions 311 on both sides of the pressure head 310 are respectively connected to the second mounting base 360 ​​by a bolt. One end of the second elastic member 370 abuts against the bolt head, and the other end abuts against the connecting portion 311 of the pressure head 310. This allows the second elastic member 370 to provide elastic force toward the support plate 320 when the pressure head 310 moves away from the second mounting base 360, so that the pressure head 310 presses the electrode tab to be welded toward the support plate 320, ensuring a more secure press.

[0070] In some embodiments, the second elastic element 370 may be a spring. It should be noted that, in addition to a spring, the second elastic element 370 may also be other components capable of providing elastic force, such as a tension spring. It is understood that when the second elastic element 370 is a tension spring, the relative positions of the second elastic element 370 with the pressure head 310 and the second mounting base 360 ​​can be adaptively adjusted, which will not be elaborated further here.

[0071] Further reference Figure 4 As shown, a slit 312 is formed inside the pressure head 310 to allow the laser to pass through. The laser emitted by the laser welder (not shown) can irradiate the pressed electrode tab through the slit 312 to weld the electrode tab. It should be noted that in the embodiments of this application, the size and shape of the slit 312 are not specifically limited. They can be set according to actual production needs without departing from the inventive concept of this application.

[0072] Reference Figure 4 and Figure 7 As shown, a cavity 313 is formed inside the pressure head 310. A second opening 314 is provided on the side of the pressure head 310 facing the support plate 320, and the cavity 313 communicates with the outside of the pressure head 310 through the second opening 314. The pressing mechanism also includes a dust collection assembly 400, which includes a housing 410 and a pipe 420. The pipe 420 connects the housing 410 to an external dust collection device. The housing 410 has a dust collection chamber with a dust collection port 411 facing the pressure head 310 and communicating with the cavity 313. By adding the dust collection assembly, the fumes generated during welding and the metal particles and impurities in the welding area can be removed, ensuring welding quality and preventing impurities from affecting the welding effect.

[0073] In some embodiments, the second opening 314 is integral with the slit 312.

[0074] In some embodiments, the clamping assembly further includes a second drive assembly 380, as shown in the figure. Figure 4 and Figure 7 As shown, the second drive assembly 380 includes a slide rail 381, a first slider 382, ​​a second slider 383, and a first drive member 384. Both the first slider 382 and the second slider 383 are mounted on the slide rail 381, and the drive end of the first drive member 384 is connected to the support plate 320. Further, the support plate 320 is mounted on the first slider 382, ​​and the pressure head 310 is mounted on the second slider 383. The first drive member 384 can drive the first slider 382 and the second slider 383 to move the support plate 320 and the pressure head 310 in directions that bring them closer together or further apart, thereby allowing the pressure head 310 and the support plate 320 to smoothly press or release the electrode tabs to be welded. As an illustrative and not limiting description, the first drive member 384 can be a cylinder.

[0075] In other embodiments, the clamping assembly further includes a third drive assembly 390, see reference to Figure 5 As shown, the third drive assembly 390 includes a second drive member 391, a guide rod 392, and a third elastic member 393. The pressure head 310 and the support plate 320 are both slidably mounted on the guide rod 392. The drive end of the second drive member 391 is driveably connected to the support plate 320. The second drive member 391 can drive the support plate 320 and the pressure head 310 to move closer and further apart along the guide rod 392, thereby allowing the pressure head 310 and the support plate 320 to smoothly press or release the electrode tabs to be welded. The third elastic member 393 is mounted on the guide rod 392 and driveably connected to the support plate 320 or the pressure head 310. The third elastic member 393 is configured to provide clamping force when the support plate 320 and the pressure head 310 approach each other, ensuring a more secure clamping. As an exemplary and not limiting illustration, the second drive member 391 may be a cylinder.

[0076] Further reference Figure 1 As shown, the first drive assembly 200 includes a third drive member 210, a fourth drive member 220, and a fifth drive member (not shown in the figure). The third drive member 210 is configured to drive the clamping assembly 300 to move along a first direction, the fourth drive member 220 is configured to drive the clamping assembly 300 to move along a second direction, and the fifth drive member (not shown in the figure) is configured to drive the clamping assembly 300 to move along a third direction. By setting the first drive assembly, the clamping assembly can be driven to move in multiple directions, ensuring that the clamping assembly can move to a predetermined position (such as the working position), thereby improving the clamping effect.

[0077] In some embodiments, a third driving member 210 is disposed above a fourth driving member 220. The third driving member 210 includes, but is not limited to, a lifting cylinder. A pressing assembly 300 is fixedly connected to the driving end of the lifting cylinder, and the pressing assembly 300 can move along a first direction under the drive of the lifting cylinder. The fourth driving member 220 is connected below the third driving member 210. A first guide rail 221 and a third slider 222 are disposed on the fourth driving member 220. The first guide rail 221 extends along a second direction. The third driving member 210 is slidably connected to the first guide rail 221 via the third slider 222, and the third driving member 210 can move along the second direction on the fourth driving member 220. A fifth driving member is disposed below the fourth driving member 220. A second guide rail 231 and a fourth slider 232 are disposed on the fifth driving member. The second guide rail 231 extends along a third direction. The fourth driving member 220 is slidably connected to the second guide rail 231 via the fourth slider 232, and the fourth driving member 220 can move along the third direction on the fifth driving member.

[0078] Corresponding to the above-mentioned clamping mechanism, this application also provides a tab welding device, see reference. Figure 8 As shown, the electrode welding device includes a frame 1000, a laser welder 2000, a conveying mechanism 3000, a position adjustment mechanism 4000, and multiple clamping mechanisms 5000 as described above. The laser welder 2000 is disposed on one side of the frame 1000, and the conveying mechanism 3000, the position adjustment mechanism 4000, and the clamping mechanisms 5000 are all disposed on the frame 1000.

[0079] In some embodiments, the conveying mechanism 3000 is configured to convey the battery cell modules (not shown) to be welded to each welding station 6000. Multiple clamping mechanisms 5000 are respectively mounted on the sides of each welding station 6000 and configured to clamp the tabs of the battery cell modules to be welded at each welding station 6000. A laser welder 2000 is configured to weld the tabs of the battery cell modules located at each welding station 6000. A position adjustment mechanism 4000 is provided below at least one welding station 6000, and the position adjustment mechanism 4000 is configured to adjust the orientation of the corresponding battery cell module to be welded.

[0080] In some embodiments, the position adjustment mechanism 4000 includes a rotation mechanism and a lifting mechanism. The rotation mechanism can drive the battery cell module to rotate, and the lifting mechanism can drive the battery cell module to rise and fall.

[0081] Understandably, the number of 6000 welding stations can be set according to the actual electrode distribution of the battery cell module, and no specific limit is made here.

[0082] Taking a battery cell module with tabs on all three sides as an example, the tab welding device provided in this application embodiment, when in operation, the battery cell module to be welded is fixed on a fixture, the conveying mechanism 3000 conveys the battery cell module to the first welding station 6000, the lifting mechanism in the position adjustment mechanism 4000 located below the first welding station 6000 lifts the fixture, raising the battery cell module to an operable height, and the robot drives the laser welder 2000 to the first welding station 6000 to perform laser welding on the tabs on the first side of the battery cell module. After the first electrode tab is welded, the rotation mechanism in the position adjustment mechanism 4000 drives the lifting mechanism to rotate 90°. Then the lifting mechanism descends, and the conveying mechanism 3000 transports the battery cell module to the second welding station 6000. The lifting mechanism in the position adjustment mechanism 4000 located below the second welding station 6000 lifts the fixture and raises the battery cell module to a working height. The robot drives the laser welder 2000 to the second welding station 6000 to perform laser welding on the second electrode tab of the battery cell module. After the second electrode tab is welded, the rotating mechanism in the position adjustment mechanism 4000 drives the lifting mechanism to rotate 90°. Then, the lifting mechanism descends, and the conveying mechanism 3000 transports the battery cell module to the third welding station 6000. The lifting mechanism in the position adjustment mechanism 4000, located below the third welding station 6000, lifts the fixture, raising the battery cell module to a workable height. The robot drives the laser welder 2000 to the third welding station 6000 to perform laser welding on the second electrode tab of the battery cell module. After the third electrode tab is welded, the lifting mechanism descends, and the conveying mechanism 3000 transports the welded battery cell module to the next process.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A press mechanism for pressing a tab after a welding and bending of the tab, characterized by, The clamping mechanism includes a bracket, a first drive assembly disposed on the bracket, and a clamping assembly connected to the drive end of the first drive assembly. The first drive component is configured to drive the clamping component to move relative to the bracket; The clamping assembly includes a clamping head and a support plate disposed opposite to each other, wherein a receiving space is formed between the clamping head and the support plate for accommodating a tab to be welded, and the clamping head is configured to move in a direction close to the support plate to clamp the tab located in the receiving space onto the support plate before welding the tab.

2. The holdback mechanism of claim 1, wherein, When the pressure head and the support plate are not pressed together, a first opening is formed between the pressure head and the support plate. The first driving component drives the pressing component to move in a preset direction so that the electrode tab enters the receiving space through the first opening.

3. The holdback mechanism of claim 1, wherein, The clamping assembly also includes: A first mounting base, wherein the support plate is rotatably mounted on the first mounting base; A first elastic element has two ends connected to the support plate and the first mounting base, respectively. The first elastic element is configured to provide a spring force toward the pressure head when the support plate rotates relative to the first mounting base, so that the support plate presses the electrode tab to be welded toward the pressure head. The number of the first elastic elements includes at least two, and the at least two first elastic elements are respectively disposed on both sides of the support plate.

4. The clamping mechanism according to claim 1, characterized in that, The clamping assembly also includes: A second mounting base, wherein the pressure head is resiliently mounted on the second mounting base, and the pressure head is configured to be movable relative to the second mounting base in a direction toward or away from the second mounting base; The second elastic element, at least one end of which abuts against the pressure head, is configured to provide a spring force toward the support plate when the pressure head moves in a direction away from the second mounting base, so that the pressure head presses the electrode tab to be welded toward the support plate. The number of the second elastic elements includes at least two, and the at least two second elastic elements are respectively disposed on both sides of the pressure head.

5. A compression mechanism according to any one of claims 1 to 4, wherein The clamping assembly further includes a second driving assembly, which includes a slide rail, a first slider, a second slider, and a first driving member disposed on the slide rail. The support plate is disposed on the first slider, and the pressure head is disposed on the second slider; The driving end of the first driving member is connected to the support plate and is configured to drive the first slider and the second slider to move the support plate and the pressure head in a direction that moves closer to or further away from each other.

6. A compression mechanism according to any one of claims 1 to 4, wherein The clamping assembly further includes a third driving assembly, which includes a second driving member, a guide rod, and a third elastic member. The pressure head and the support plate are both slidably mounted on the guide rod. The driving end of the second driving member is connected to the support plate and is configured to drive the support plate and the pressure head to move closer and further apart along the guide rod. The third elastic element is mounted on the guide rod and is drivenly connected to the support plate or the pressure head. The third elastic element is configured to provide clamping force when the support plate approaches the pressure head.

7. The clamping mechanism according to any one of claims 1 to 4, characterized in that, A gap is formed inside the pressure head to allow the laser to pass through. The laser emitted by the laser welder shines through the gap onto the clamped electrode to weld the electrode.

8. A compression mechanism according to any one of claims 1 to 4, wherein The pressure head has a cavity inside, and a second opening is provided on the side of the pressure head facing the support plate. The cavity communicates with the outside of the pressure head through the second opening. The pressing mechanism also includes a dust suction component, the dust suction port of which faces the pressing head and communicates with the cavity.

9. The holdback mechanism of claim 2, wherein, The first driving component includes: A third driving element is configured to drive the clamping assembly to move along a first direction; and / or, A fourth driving element is configured to drive the clamping assembly to move along a second direction; and / or, The fifth drive element is configured to drive the clamping assembly to move in a third direction.

10. A tab welding apparatus characterized by comprising: The electrode welding device includes a frame, a laser welder disposed on one side of the frame, a conveying mechanism disposed on the frame, a position adjustment mechanism, and a plurality of clamping mechanisms as described in any one of claims 1 to 9; The conveying mechanism is configured to convey the battery cell modules to be welded to each welding station; Multiple clamping mechanisms are respectively installed on the side of each of the welding stations and are configured to clamp the tabs of the battery cell modules to be welded at each of the welding stations. The laser welder is configured to weld the tabs of the battery cell modules to be welded at each of the welding stations. At least one of the welding stations is provided with a position adjustment mechanism below it, the position adjustment mechanism being configured to adjust the orientation of the corresponding battery cell module to be welded.

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