Seal welding device and method

Abstract

The embodiment of the invention provides a seal welding device and method, and relates to the technical field of seal welding, and the seal welding device comprises a box body which is provided with a seal cavity and is provided with a light-transmitting area; the clamp is arranged in the sealing cavity, and the clamp is used for fixing a workpiece to be welded; the laser welding module comprises a laser welding mechanism and a first driving mechanism, the laser welding mechanism is arranged on one side of the light-transmitting area, and light beams emitted by the laser welding mechanism can penetrate through the light-transmitting area and irradiate the workpiece; the first driving mechanism is used for driving the laser welding mechanism to move in the normal direction of the light-transmitting area. And the vacuumizing device is communicated with the sealing cavity. According to the embodiment of the invention, the gas in the sealing cavity of the sealed and welded workpiece can be reduced as much as possible, so that the quality of the workpiece is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of sealing welding devices, and in particular to a sealing welding device and method. Background Art

[0002] In the related art, the battery cell is designed with a liquid injection hole, which is used to inject electrolyte into the battery cell. After the electrolyte is injected, a sealing nail is usually used to seal the liquid injection hole to achieve the purpose of sealing the battery cell. In the process of injecting electrolyte into the battery cell, some gas in the electrolyte will enter the battery cell. The presence of gas will cause the battery cell to be defective or of poor quality. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a sealing welding device and method to reduce the gas inside the battery cell and improve the quality of the battery cell.

[0004] In one aspect, an embodiment of the present application provides a sealing welding device, comprising:

[0005] A box body having a sealed cavity, wherein the box body is provided with a light-transmitting area;

[0006] A clamp, disposed in the sealed cavity, and used to fix the workpiece to be welded;

[0007] A laser welding module, comprising a laser welding mechanism and a first driving mechanism, wherein the laser welding mechanism is arranged at one side of the light-transmitting area, a light beam emitted by the laser welding mechanism can pass through the light-transmitting area and irradiate the workpiece, and the first driving mechanism is used to drive the laser welding mechanism to move along the normal direction of the light-transmitting area;

[0008] A vacuum pump is communicated with the sealing cavity.

[0009] Furthermore, the fixture includes a fixture plate, a pressure plate and a driving module, the pressure plate is arranged on one side of the fixture plate, the pressure plate and the fixture plate enclose a fixed space, and the driving module is used to drive the pressure plate to move closer to or away from the fixture plate.

[0010] Furthermore, the driving module includes a first slide rail, a first slider, an elastic member and a clamping driving member, the pressure plate is slidably connected to the first slide rail, the first slider is slidably connected to the first slide rail, the elastic member connects the pressure plate and the first slider, and the clamping driving member is used to drive the first slider to slide along the first slide rail.

[0011] Furthermore, the fixture also includes an adjustment component, which includes a push plate, a push block and an adjustment drive mechanism. The push plate is slidably connected to the fixture plate, the push block is installed on the push plate, the push block is used to abut against the workpiece, and the adjustment drive mechanism is used to drive the push plate to move in the second direction.

[0012] Further, the push plate includes a base, a first support portion and a second support portion, wherein the first support portion and the second support portion are spaced apart on the base along the second direction, wherein the push block is installed on both the first support portion and the second support portion.

[0013] Furthermore, the workpiece includes a battery cell and a sealing pin, the battery cell is fixed on the fixture, and the sealing welding device also includes a sealing pin feeding mechanism, which is arranged on one side of the fixture and is used to transport the sealing pin to the liquid injection hole of the battery cell.

[0014] Furthermore, the sealing nail feeding mechanism includes a picking assembly, which includes a first picking member, a second picking member, a first driving member and a second driving member, the first driving member is used to drive the first picking member to move along a third direction, and the second driving member is used to drive the second picking member to move along the third direction.

[0015] Furthermore, the loading mechanism includes a first moving component, a second moving component and a third moving component, the second moving component is installed on the first moving component, the third moving component is installed on the second moving component, and the picking component is installed on the third moving component, the first moving component is used to drive the second moving component to move along the second direction, the second moving component is used to drive the third moving component to move along the first direction, and the third moving component is used to drive the picking component to move along the third direction.

[0016] Furthermore, the sealing welding device includes a sealing nail transfer mechanism and a detection mechanism, the sealing nail transfer mechanism is used to pick up the sealing nail and drive the sealing nail to rotate, the detection mechanism is used to detect the presence of the sealing nail, and the detection device is also used to detect the position of the sealing nail.

[0017] Furthermore, the sealing nail transfer mechanism includes a picking-up portion and a rotation driving mechanism, the picking-up portion is arranged on one side of the sealing nail feeding mechanism, and the rotation driving mechanism is used to drive the picking-up portion to rotate.

[0018] Furthermore, the box body includes a box body, a cover plate, a sealing structure and a second driving structure, the box body has an opening, the sealing structure is installed on the cover plate, and the sealing structure is used to cooperate with the opening to achieve sealing, and the second driving mechanism is used to first drive the cover plate to move in a direction away from the opening, and then drive the cover plate to be misaligned with the opening.

[0019] Furthermore, the second driving structure includes a first driving component and a second driving component, the second driving component is installed on the first driving component, the cover plate is connected to the second driving component, the second driving component is used to drive the cover plate to move in a direction away from the box body, and the first driving component drives the cover plate to move laterally through the second driving component so that the cover plate is staggered with the opening.

[0020] Furthermore, it also includes a dust removal mechanism, which has a dust removal port, and the dust removal port is located in the sealed cavity.

[0021] Another aspect of the present application provides a sealing welding method, comprising the following steps:

[0022] Placing the workpiece to be welded in the sealed cavity and fixing it by a clamp;

[0023] The sealed cavity is sealed and vacuumed;

[0024] The laser welding module is used to perform laser welding on the workpiece in the sealed cavity.

[0025] Furthermore, the sealing welding method further includes: adjusting the distance between the laser welding module and the workpiece to be welded, controlling the focus of the laser welding module, and performing laser welding on the workpiece after focusing.

[0026] Applicable to the sealing welding device as described above, the sealing welding device includes a sealing nail feeding mechanism, and the sealing nail feeding mechanism includes a plurality of picking members and a picking drive assembly that drives the plurality of picking members to move individually. When loading, the following steps are included: only one of the picking members is controlled to move along a third direction to place the workpiece in a welding position.

[0027] It can be seen from the above technical solutions that the embodiments of the present application have at least the following beneficial effects:

[0028] In the sealing welding device provided in the embodiment of the present application, the box body has a sealed cavity, and a clamp is arranged in the sealed cavity. When welding the workpiece, the workpiece to be welded is placed in the accommodating cavity and fixed with a clamp, and then the sealed cavity is sealed, the sealed cavity is evacuated, and then the workpiece is laser welded using a laser welding module. In the embodiment of the present application, the vacuum pumping device can evacuate the sealed cavity, and the workpiece is located in the vacuum sealed cavity during welding. Due to the effect of air pressure, the gas in the workpiece cavity can escape to the outside of the workpiece, so that the presence of gas in the workpiece cavity after sealing welding can be reduced as much as possible. At the same time, the laser welding mechanism can be moved along the normal direction of the light-transmitting area by the first driving mechanism, so as to adjust the focal length of the laser welding mechanism, so that the laser welding mechanism is suitable for welding workpieces of different models and sizes, which helps to improve the welding quality and practicality of the sealing welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A partial structural schematic diagram of a sealing welding device provided in one embodiment of the present application;

[0031] Figure 2 A schematic diagram of a portion of the structure of a sealing welding device provided in one embodiment of the present application from another perspective;

[0032] Figure 3 A schematic diagram of the coordination of a clamp and a sealing nail feeding mechanism in a sealing welding device provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a clamp in a sealing welding device provided in one embodiment of the present application;

[0034] Figure 5 A schematic diagram of another perspective of a clamp in a sealing welding device provided by an embodiment of the present application;

[0035] Figure 6 A schematic top view of a clamp in a sealing welding device provided in one embodiment of the present application;

[0036] Figure 7 This is a schematic diagram of the structure of an adjustment component in a sealing nail welding device according to an embodiment of the present application;

[0037] Figure 8 for Figure 7A structural diagram from another perspective;

[0038] Fig. 9 A schematic diagram of a portion of the structure of a sealing welding device provided in one embodiment of the present application from another perspective;

[0039] Fig.10 A schematic diagram of the structure of a sealing pin feeding mechanism in a sealing welding device provided in an embodiment of the present application;

[0040] Fig.11 A structural schematic diagram of a sealing nail feeding mechanism in a sealing welding device provided in an embodiment of the present application from another perspective;

[0041] Fig.12 A schematic structural diagram of a sealing pin transfer mechanism in a sealing welding device provided in one embodiment of the present application.

[0042] Reference numerals:

[0043] 1. Sealing nails;

[0044] 100, box body; 110, sealed cavity; 120, box body; 121, light-transmitting area; 122, detection channel; 130, cover plate; 141, first drive assembly; 142, second drive assembly;

[0045] 200, fixture; 210, fixture plate; 211, liquid guide groove; 212, liquid receiving groove; 220, pressing plate; 230, driving module; 231, first slide rail; 232, first slider; 233, elastic member; 234, clamping driving member; 240, separation driving mechanism; 250, adjustment assembly; 251, push plate; 2511, base; 2512, first support part; 2513, second support part; 252, adjustment driving mechanism; 253, push block; 254, abutment block; 256, push plate spring; 257, push plate slider; 258, push plate slide rail;

[0046] 300, laser welding module; 310, laser welding mechanism; 320, first driving mechanism;

[0047] 400, sealing nail feeding mechanism; 410, picking assembly; 411, first picking member; 412, second picking member; 413, first driving member; 414, second driving member; 420, first moving assembly; 430, second moving assembly; 440, third moving assembly;

[0048] 500, sealing nail transfer mechanism; 510, picking part; 520, rotation drive mechanism; 530, sensor; 540, induction sheet; 550, limit block; 561, first stop block; 562, second stop block;

[0049] 600. Testing agency;

[0050] 700, dust removal mechanism; 710, dust removal port;

[0051] 800. Material box. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Before the battery cell is sealed and welded with the sealing pin 1, an electrolyte is injected into the battery cell, and there is gas in the electrolyte, and the gas enters the battery cell along with the electrolyte. The presence of gas inside the battery cell will cause the battery cell to be defective or of poor quality.

[0054] In view of this, one embodiment of the present application provides a sealing welding device to effectively solve the aforementioned problem.

[0055] See also Figures 1 to 3 As shown, one embodiment of the present application discloses a sealing welding device, including a box body 100, a clamp 200, a laser welding module 300 and a vacuum device.

[0056] Specifically, the box body 100 has a sealed cavity 110, and the box body 100 is provided with a light-transmitting area 121; the clamp 200 is arranged in the sealed cavity 110, and the clamp 200 is used to fix the workpiece to be welded; the laser welding module 300 includes a laser welding mechanism 310 and a first driving mechanism 320, the laser welding mechanism 310 is arranged on one side of the light-transmitting area 121, and the light beam emitted by the laser welding mechanism 310 can pass through the light-transmitting area 121 and irradiate the workpiece, and the first driving mechanism 320 is used to drive the laser welding mechanism 310 to move along the normal direction of the light-transmitting area 121; the vacuum pumping device is connected to the sealed cavity 110.

[0057] The normal direction of the light-transmitting area 121 refers to Figure 1 The X direction is shown.

[0058] In the sealing welding device provided in the embodiment of the present application, the box 100 has a sealing cavity 110, and a fixture 200 is arranged in the sealing cavity 110. In order to exhaust the gas in the workpiece as much as possible, when the workpiece is sealed and welded, the workpiece to be welded is placed in the fixture 200, and then the sealing cavity 110 is sealed, and the sealing cavity 110 is vacuumed, and then the workpiece is laser welded by the laser welding module 300.

[0059] In the embodiment of the present application, the workpiece is located in the vacuum sealed chamber 110 during welding. Due to the pressure, the gas in the workpiece cavity can escape to the outside of the workpiece, so that the presence of gas can be reduced as much as possible in the welded workpiece. At the same time, the laser welding mechanism 310 can be moved along the first direction by the first driving mechanism 320, so that the focal length of the laser welding mechanism 310 can be adjusted, so that the laser welding mechanism 310 is suitable for welding workpieces of different models and the welding effect of the workpiece is guaranteed, which helps to improve the practicality of the sealing welding device.

[0060] In some embodiments of the present application, see Figure 1 The box body 100 includes a box body 120, a cover plate 130, a sealing structure and a second driving mechanism. The box body 120 has an opening. The cover plate 130 is used to connect with the opening. The sealing structure is installed on the cover plate 130, and the sealing structure is used to cooperate with the opening to achieve sealing. The second driving mechanism is used to first drive the cover plate 130 to move in a direction away from the opening, and then drive the cover plate 130 to be misaligned with the opening. When clamping the workpiece, the cover plate 130 is misaligned with the opening, that is, the cover plate 130 is located at a non-opening position to facilitate the workpiece to be placed in the sealed cavity and clamped in the fixture. During welding, the cover plate 130 is sealed and connected to the opening, so that a closed sealed cavity 110 is defined in the box body 120, and then the vacuum device is turned on, and the air in the sealed cavity 110 is discharged from the sealed cavity 110 by the vacuum device.

[0061] In one possible implementation, see Figure 1 The second driving mechanism includes a first driving assembly 141 and a second driving assembly 142. The second driving assembly 142 is installed on the first driving assembly 141. The cover plate 130 is connected to the second driving assembly 142. The second driving assembly 142 is used to drive the cover plate 130 to move away from the box body 100. The first driving assembly 141 moves through the second driving assembly 142 to drive the cover plate 130 to move horizontally, so that the cover plate 130 is staggered from the opening position. In this embodiment, the first driving assembly

[0062] 141 can drive the second driving assembly 142 to move along the X direction, and the second driving assembly 142 can drive the cover plate 130 to move along the X direction, so that the cover plate 130 can be separated from the box body 120 along the X direction and then move along the X direction, which can effectively avoid the situation where the sealing structure of the sealing connection between the cover plate 130 and the box body 120 is damaged, resulting in a weakening or even failure of the sealing effect.

[0063] Exemplarily, the sealing structure may specifically be a sealing ring.

[0064] A large amount of smoke will be generated during laser welding. After the smoke adheres to the surface of the workpiece, it will seriously affect the welding quality of the workpiece.

[0065] Therefore, in some embodiments of the present application, see Figure 2 The sealing welding device includes a dust removal mechanism 700, which has a dust removal port 710. The dust removal port 710 is located in the sealing cavity 110 and is connected to the outside through a pipeline. When welding the workpiece, the dust removal mechanism 700 is started to discharge the smoke generated by laser welding.

[0066] In some embodiments of the present application, see Figures 2 to 4 As shown, the fixture 200 includes a fixture plate 210, a pressing plate 220 and a driving module 230. The pressing plate 220 is arranged on one side of the fixture plate 210. The pressing plate 220 and the fixture plate 210 enclose a fixed space. The driving module 230 is used to drive the pressing plate 220 to move closer to or away from the fixture plate 210. Specifically, the pressing plate 220 and the fixture plate 210 are arranged in parallel, and the fixture plate 210 is relatively fixed. By using the driving module 230 to drive the pressing plate 220 to move, the spacing of the fixed space can be changed, so that the workpiece located in the fixed space can be clamped and fixed, or the workpiece can be released.

[0067] In some embodiments of the present application, see Figures 4 to 6 As shown, the driving module 230 includes a first slide rail 231, a first slider 232, an elastic member 233 and a clamping driving member 234. The pressing plate 220 is slidably connected to the first slide rail 231, the first slide rail 231 is slidably connected to the first slider 232, the elastic member 233 connects the pressing plate 220 and the first slider 232, and the clamping driving member 234 is used to drive the first slider 232 to slide along the first slide rail 231. Among them, the elastic member 233 connects the pressing plate 220 and the first slider 232, that is, the pressing plate 220 and the first slider 232 are elastically connected. The clamping driving member 234 can change the relative position of the first slider 232 and the first slide rail 231 by driving the first slider 232 to move, thereby driving the elastic member 233 and the pressing plate 220 to slide along the first slide rail 231. When the pressing plate 220 contacts the workpiece, the elastic member 233 is compressed after receiving the force, thereby preventing the workpiece from being pressed hard by the pressing plate 220 , helping to reduce damage to the workpiece due to excessive load, and protecting the workpiece.

[0068] In a possible implementation manner, the clamping driving member 234 is specifically a cylinder, and an output end of the cylinder is connected to the first sliding block 232 .

[0069] In this embodiment, see Figures 3 to 6, the two fixtures 200 are arranged in parallel along the Y direction. Specifically, the first slide rails 231 corresponding to the two fixtures 200 are arranged at intervals in the Y direction, and the cylinder is arranged between the first slide rails 231 corresponding to the two fixtures 200. The cylinder is connected to the first sliders 232 corresponding to the two fixtures 200 at the same time. In this way, the pressing plates 220 of the two fixtures 200 can be driven to move synchronously by one cylinder.

[0070] In one possible implementation, see Figure 4 and Figure 6 As shown, the elastic member 233 is specifically a spring, one end of the spring is connected to the pressing plate 220, and the other end is connected to the first sliding block 232. The expansion and contraction direction of the spring is consistent with the extension direction of the first sliding rail 231.

[0071] It should be noted that the extension direction of the first slide rail 231 is the X direction in the figure. Figure 6 shown.

[0072] In one embodiment, see Figure 4 The sealing welding device includes a base plate and a separation drive mechanism 240. The base plate is mounted on the separation drive mechanism 200. The separation drive mechanism 240 is used to drive the base plate to move along the Y direction. Specifically, two clamps 200 are arranged on the base plate at intervals along the Y direction. The separation drive mechanism 240 drives the base plate to move along the Y direction to drive the two clamps 200 to move along the Y direction as a whole. In actual applications, when multiple battery cells need to be welded, one of the battery cells is welded first, and then the separation drive mechanism 240 is used to drive the clamp 200 to move along the Y direction, so that the other clamp 200 is located in the welding area of ​​the laser welding module 300, and then the second battery cell is sealed and welded.

[0073] In a possible implementation, the separation drive mechanism 240 includes an electric cylinder, which is used to drive the bottom plate to move back and forth along the Y direction. Figure 4 Of course, the separation drive mechanism 240 may also be other mechanisms capable of realizing linear drive, such as a lead screw nut mechanism, which is not limited here.

[0074] In some embodiments of the present application, see Figure 2 , Figure 5 , Figure 7 and Figure 8 The fixture 200 further includes an adjustment assembly 250 , which is used to adjust the relative position of the workpiece between the fixture plate 210 and the pressure plate 220 .

[0075] In this embodiment, see Figure 3 , Figures 6 to 8The adjustment assembly 250 includes a push plate 251, a push block 253 and an adjustment drive mechanism 252. The push plate 251 is slidably connected to the fixture plate 210. The push block 253 is installed on the push plate 251. The push block 253 is used to abut against the workpiece. The adjustment drive mechanism 252 is used to drive the push plate 251 to move along the second direction. The push block 253 is located between the fixture plate 210 and the pressure plate 220, so that the push block 253 can extend into the enclosed space enclosed by the fixture plate 210 and the pressure plate 220, and then push the workpiece placed in the enclosed space to move along the second direction, so as to adjust the relative position of the workpiece in the second direction, so that the position of the workpiece to be welded can be located within the welding area of ​​the laser welding module 300.

[0076] The second direction refers to Figure 3 in the Y direction.

[0077] In this embodiment, see 7 and Figure 8 The adjustment assembly 250 includes an abutment block 254 and a push plate spring 256. The abutment block 254 is fixedly connected to the fixture plate 210, and the push plate spring 256 connects the push plate 251 and the push plate spring 256. The setting of the push plate spring 256 can effectively prevent the push plate 251 from hard pressing the battery cell and causing damage to the battery cell.

[0078] Furthermore, the adjustment assembly 250 also includes a push plate slider 257 and a push plate slide rail 258 , the push plate slider 257 is slidably connected to the push plate slide rail 258 , and the push plate 251 is slidably connected to the fixture plate 210 through the push plate slider 257 and the push plate slide rail 258 .

[0079] In this embodiment, see Figure 3 and Figure 4 , two fixed spaces are formed on one side of the push plate, each of which is used to fix a workpiece. Figure 3 , Figure 7 and Figure 8 The push plate 251 includes a base 2511, a first support portion 2512 and a second support portion 2513, wherein the first support portion 2512 and the second support portion 2513 are spaced apart on the base 2511 along the second direction, wherein the first support portion 2512 and the second support portion 2513 are both installed with a push block 253. In this way, the positions of the workpieces in the two fixed spaces can be adjusted simultaneously by one push plate 251, thereby simplifying the structural design of the fixture. Figure 7 in the Y direction.

[0080] It is worth to understand that when there are multiple fixed spaces, the push plate 251 can realize the position adjustment of the workpieces in multiple fixed spaces by adding support parts and push blocks 253.

[0081] In some embodiments of the present application, see Figure 2The workpiece includes a battery cell and a sealing nail 1, the battery cell is fixed on the fixture 200, and the sealing welding device also includes a sealing nail feeding mechanism 400, which is arranged on one side of the fixture 200, and the sealing nail feeding mechanism 400 is used to transport the sealing nail to the injection hole of the battery cell. When the sealing nail 1 is transported to the injection hole, the sealing nail 1 cooperates with the injection hole of the battery cell, and then the laser welding module 300 performs laser welding on the sealing nail 1, so that the sealing nail 1 and the injection hole of the battery cell are sealed and connected.

[0082] When the sealing nail 1 is matched with the liquid injection hole of the battery cell, the electrolyte of the battery cell may overflow. In this embodiment, the liquid guide groove 211 is located on one side of the liquid injection hole of the battery cell, and the fixture plate 210 is provided with the liquid guide groove 211 and a liquid receiving channel connected to the liquid guide groove 211, and a liquid receiving groove 212 is provided at the end of the liquid receiving channel. Figure 3 When the electrolyte of the battery cell overflows, the overflowed electrolyte can flow along the liquid guiding groove 211 and the liquid receiving channel to the liquid receiving groove 212 .

[0083] See also Figures 8 to 11 The sealing nail feeding mechanism 400 includes a picking-up assembly 410, which is used to pick up the sealing nail 1 to transport the sealing nail 1 to the liquid injection hole of the battery cell.

[0084] In this embodiment, please continue to refer to Figures 9 to 11 The picking assembly 410 includes a first picking member 411, a second picking member 430, a first driving member 413 and a second driving member 414. The first driving member 413 is used to drive the first picking member 411 to move along the third direction, and the second driving member 414 is used to drive the second picking member 430 to move along the third direction. The first driving member 413 and the second driving member 414 can act independently, so that the first picking member 411 and the second picking member 430 can act independently of each other.

[0085] In one possible implementation, please continue to see Figures 9 to 11 Taking two battery cells arranged in parallel as an example, the pick-up assembly 410 includes a first pick-up member 411 and a second pick-up member 430, and the first pick-up member 411 and the second pick-up member 430 are respectively used to pick up a sealing nail 1. When welding the first battery cell, one of the first pick-up member 411 and the second pick-up member 430 moves along the Z direction to place the sealing nail 1 at the liquid injection port of the battery cell, and the other sealing nail 1 remains stationary. In this way, the two sealing nails 1 are staggered, which can prevent the two sealing nails 1 from moving down along the Z direction at the same time and pressing on the battery cell to damage the shape of the battery cell or the sealing nail 1, thereby reducing the situation of poor welding or poor battery cell, which is conducive to ensuring the quality of the battery cell.

[0086] In the above embodiment, the shape of the sealing nail 1 refers to the position and placement angle of the sealing nail 1. The correct matching of the sealing nail 1 and the injection hole of the battery cell is an important prerequisite for the quality of the battery cell sealing welding, and the shape of the sealing nail is usually adjusted during the loading process. After the adjustment, the sealing nail 1 is placed at the injection hole of the battery cell by the pickup assembly 410. Therefore, during the transportation of the sealing nail 1, the shape of the sealing nail 1 needs to be guaranteed to ensure that the sealing nail 1 and the injection hole of the battery cell are accurately matched, thereby ensuring the quality of the battery cell.

[0087] In some embodiments of this application, please continue to refer to Figures 9 to 11 The loading mechanism includes a first moving component 420, a second moving component 430 and a third moving component 440. The second moving component 430 is installed on the first moving component 420, the third moving component 440 is installed on the second moving component 430, and the picking component 410 is installed on the third moving component 440. The first moving component 420 is used to drive the second moving component 430 to move along the second direction, the second moving component 430 is used to drive the third moving component 440 to move along the first direction, and the third moving component 440 is used to drive the picking component 410 to move along the third direction.

[0088] The first direction refers to Fig. 9 The X direction is shown in the figure, and the second direction refers to Fig. 9 The Y direction shown in the figure, the third direction refers to Fig. 9 The Z direction is shown.

[0089] In some embodiments of the present application, see Figure 1 , Figure 2 and Fig.12 The sealing welding device includes a sealing nail transfer mechanism 500 and a detection mechanism 600. The sealing nail transfer mechanism 500 is used to pick up the sealing nail 1 and drive the sealing nail 1 to rotate. The detection mechanism 600 is used to detect the presence of the sealing nail 1. The detection device is also used to detect the position of the sealing nail 1. By detecting the presence of the sealing nail 1 by the detection mechanism 600, the situation of missing the sealing nail 1 during the welding of the battery core can be reduced. At the same time, the detection device is also used to detect the position of the sealing nail 1, and the shape of the sealing nail 1 can be determined.

[0090] In this embodiment, see Figure 1 The detection mechanism 600 is arranged outside the box body 100, and the box body 100 is provided with a detection channel 122, and a lens is arranged at the detection channel 122. The detection mechanism 600 can collect information about the sealing nail 1 in the sealing nail transfer mechanism through the detection channel 122.

[0091] In a possible implementation, the detection mechanism 600 includes a camera, which is used to collect information about the sealing nails and transmit the information to a control center to determine the presence or absence of the sealing nails 1 and the shape of the sealing nails 1 .

[0092] In some embodiments of the present application, see Fig.12 The sealing nail transfer mechanism 500 includes a picking portion 510 and a rotation driving mechanism 520 . The picking portion 510 is disposed on one side of the sealing nail feeding mechanism 400 , and the rotation driving mechanism 520 is used to drive the picking portion 510 to rotate.

[0093] In the above embodiment, the rotation driving mechanism 520 is specifically a motor, and the output end of the motor is connected to the picking portion 510 to drive the picking portion 510 to rotate.

[0094] In a possible implementation manner, the pickup portion 510 has a suction port, and the suction port forms a negative pressure, so that the sealing pin 1 is sucked and fixed by vacuum suction.

[0095] Of course, the picking portion 510 may also adopt other grabbing mechanisms that can be used to grab the sealing nail 1 to perform the picking work, which is not limited here.

[0096] See also Fig.12 The sealing nail transfer mechanism 500 also includes a sensor 530 and a sensing sheet 540. The sensing sheet 540 is fixedly connected to the pick-up portion 510. When the rotation drive mechanism 520 drives the pick-up portion 510 to rotate, the sensing sheet 540 rotates synchronously with the pick-up portion 510. When the sensing sheet 540 rotates, the sensing sheet 540 can move to the detection area of ​​the sensor 530 or move from the detection area of ​​the sensor 530 to the non-detection area. When the sensor 530 detects the sensing sheet 540, the camera starts and detects whether a sealing nail 1 is picked up in the pick-up portion 510, and detects the shape of the sealing nail 1 in the pick-up portion 510.

[0097] In this embodiment, after the sealing nail 1 is conveyed to the suction position of the pickup portion 510 and adsorbed by the pickup portion 510 , the motor drives the pickup portion 510 to rotate 90° so that the sealing nail 1 rotates to the detection area of ​​the camera.

[0098] Further, see Fig.12 The sealing nail transfer mechanism 500 also includes a limit block 550, a first stop block 561 and a second stop block 562. The limit block 550 is fixedly connected to the picking portion 510. The first stop block 561 and the second stop block 562 are respectively arranged on both sides of the limit block 550, which facilitates the first stop block 561 and the second stop block 562 to stop the limit block 550 to limit the rotation angle of the picking portion 510.

[0099] See also Figure 2A material box 800 is provided on one side of the sealing nail transfer mechanism 500 , and the material box 800 is used to store the sealing nails 1 .

[0100] In a possible implementation, the material box 800 is disposed on one side of the sealing nail transfer mechanism 500 , and when the sealing nails 1 fall due to vacuum breaking or other reasons, the fallen sealing nails 1 can be collected in the material box 800 .

[0101] Another aspect of the present application discloses a sealing welding method, comprising the following steps:

[0102] The workpiece to be welded is placed in the sealed chamber 110 and fixed by the clamp 200;

[0103] The sealing chamber 110 is sealed and vacuumed;

[0104] The laser welding module 300 is used to perform laser welding on the workpieces in the sealed cavity 110 .

[0105] In the sealing welding method of the embodiment of the present application, the air in the sealing cavity 110 can be discharged by vacuuming the sealing cavity 110. Due to the pressure effect, the gas existing in the cavity of the workpiece can be discharged as much as possible from the cavity to be sealed of the workpiece. In other words, the workpiece is sealed and welded in the sealing cavity 110, thereby reducing the gas in the cavity to be sealed and welded.

[0106] In the above embodiment, when the sealed cavity 110 is evacuated, a corresponding vacuum degree may be selected according to specific process requirements to ensure that the gas in the workpiece can be discharged from the cavity of the workpiece to be sealed and welded as much as possible.

[0107] It is worth understanding that the sealing welding method of the embodiment of the present application can be applied to the sealing welding device as described above.

[0108] In one embodiment of the present application, the sealing welding method further includes: adjusting the distance between the laser welding module 300 and the workpiece to be welded, controlling the focus of the laser welding module 300, and performing laser welding on the workpiece after focusing. In this way, the laser welding effect can be guaranteed.

[0109] In some embodiments of the present application, the sealing welding method is applied to the sealing welding device as described above, and the sealing welding device includes a sealing nail feeding mechanism 400, and the sealing nail feeding mechanism 400 includes multiple picking members and a picking drive assembly that drives the multiple picking members to move separately. When loading, the following steps are included: only one of the picking members is controlled to move along the third direction to place the workpiece in the welding position. In this way, it can be avoided that multiple picking members are close to the workpiece clamped in the fixture at the same time, causing damage to the workpiece, which helps to protect the workpiece and thus ensure the quality of the workpiece. Among them, the third direction is Fig.11The Z direction in .

[0110] In one embodiment of the present application, the workpiece to be welded is specifically a battery cell and a sealing nail 1, the battery cell has a liquid injection hole, and the sealing nail 1 is connected with the liquid injection hole. After the electrolyte is injected into the battery cell, the sealing welding of the battery cell and the sealing nail 1 is completed in a vacuum sealed chamber 110. In this way, the gas in the electrolyte can be discharged from the battery cell as much as possible, which is conducive to ensuring the quality of the battery cell.

[0111] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0112] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0113] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0114] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0115] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

Claims

1. A sealing welding device, characterized in that: include: A box body having a sealed cavity, wherein the box body is provided with a light-transmitting area; A clamp is arranged in the sealed cavity, and is used to fix the workpiece to be welded; A laser welding module, comprising a laser welding mechanism and a first driving mechanism, wherein the laser welding mechanism is arranged at one side of the light-transmitting area, a light beam emitted by the laser welding mechanism can pass through the light-transmitting area and irradiate the workpiece, and the first driving mechanism is used to drive the laser welding mechanism to move along the normal direction of the light-transmitting area; A vacuum pump is communicated with the sealing cavity.

2. The sealing welding device according to claim 1, characterized in that: The fixture includes a fixture plate, a pressure plate and a driving module. The pressure plate is arranged on one side of the fixture plate. The pressure plate and the fixture plate enclose a fixed space. The driving module is used to drive the pressure plate to move closer to or away from the fixture plate.

3. The sealing welding device according to claim 2, characterized in that: The driving module includes a first slide rail, a first slider, an elastic member and a clamping driving member. The pressure plate is slidably connected to the first slide rail, the first slider is slidably connected to the first slide rail, the elastic member connects the pressure plate and the first slider, and the clamping driving member is used to drive the first slider to slide along the first slide rail.

4. The sealing nail welding device according to claim 3, characterized in that: The fixture also includes an adjustment component, which includes a push plate, a push block and an adjustment drive mechanism. The push plate is slidably connected to the fixture plate, the push block is installed on the push plate, the push block is used to abut against the workpiece, and the adjustment drive mechanism is used to drive the push plate to move along the second direction.

5. The sealing nail welding device according to claim 4, characterized in that: The push plate includes a base, a first support portion, and a second support portion, wherein the first support portion and the second support portion are spaced apart on the base along the second direction, wherein the push block is mounted on both the first support portion and the second support portion.

6. The sealing welding device according to claim 1, characterized in that: The workpiece includes a battery cell and a sealing nail, the battery cell is fixed on the fixture, and the sealing welding device also includes a sealing nail feeding mechanism, which is arranged on one side of the fixture and is used to transport the sealing nail to the injection hole of the battery cell.

7. The sealing welding device according to claim 6, characterized in that: The sealing nail feeding mechanism includes a picking component, which includes a first picking member, a second picking member, a first driving member and a second driving member. The first driving member is used to drive the first picking member to move along a third direction, and the second driving member is used to drive the second picking member to move along the third direction.

8. The sealing welding device according to claim 6, characterized in that: The loading mechanism includes a first moving component, a second moving component and a third moving component, the second moving component is installed on the first moving component, the third moving component is installed on the second moving component, and the picking component is installed on the third moving component. The first moving component is used to drive the second moving component to move in the second direction, the second moving component is used to drive the third moving component to move in the first direction, and the third moving component is used to drive the picking component to move in the third direction.

9. The sealing welding device according to claim 6, characterized in that: The sealing welding device includes a sealing nail transfer mechanism and a detection mechanism. The sealing nail transfer mechanism is used to pick up the sealing nail and drive the sealing nail to rotate. The detection mechanism is used to detect the presence of the sealing nail. The detection device is also used to detect the position of the sealing nail.

10. The sealing nail welding device according to claim 9, characterized in that: The sealing nail transfer mechanism includes a picking-up portion and a rotation driving mechanism. The picking-up portion is arranged on one side of the sealing nail feeding mechanism, and the rotation driving mechanism is used to drive the picking-up portion to rotate.

11. The sealing nail welding device according to claim 1, characterized in that: The box body includes a box body, a cover plate, a sealing structure and a second driving structure. The box body has an opening. The sealing structure is installed on the cover plate, and the sealing structure is used to cooperate with the opening to achieve sealing. The second driving mechanism is used to first drive the cover plate to move in a direction away from the opening, and then drive the cover plate to be misaligned with the opening.

12. The sealing nail welding device according to claim 11, characterized in that: The second driving structure includes a first driving component and a second driving component, the second driving component is installed on the first driving component, the cover plate is connected to the second driving component, the second driving component is used to drive the cover plate to move away from the box body, and the first driving component drives the cover plate to move laterally through the second driving component so that the cover plate is staggered with the opening.

13. A sealing welding method, characterized in that: The steps include: Placing the workpiece to be welded in the sealed cavity and fixing it by a clamp; The sealed cavity is sealed and vacuumed; The laser welding module is used to perform laser welding on the workpiece in the sealed cavity.

14. The sealing pin welding method according to claim 13, characterized in that: Also includes: The distance between the laser welding module and the workpiece to be welded is adjusted, and the laser welding module is controlled to focus, and the workpiece is laser welded after focusing.

15. The sealing pin welding method according to claim 13, characterized in that: Applicable to the sealing welding device as described in any one of claims 1 to 12, the sealing welding device includes a sealing nail feeding mechanism, the sealing nail feeding mechanism includes a plurality of picking members and a picking drive assembly that drives the plurality of picking members to move individually, and when loading, includes the following steps: only controlling one of the picking members to move along a third direction to place the workpiece in a welding position.

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