Welding mechanism

Abstract

The utility model belongs to the technical field of battery production, and discloses a welding mechanism which comprises a welding device and a first feeding device used for feeding roll cores. The welding device comprises a welding machine, a first driving part and a welding pressing plate, a first adsorption opening, a second adsorption opening and a plurality of welding holes are formed in the welding pressing plate at intervals, the first adsorption opening and the second adsorption opening are both connected with an external negative pressure device, and the first driving part is in transmission connection with the welding pressing plate; and the cover plate is adsorbed and driven to move, the confluence disc abuts against the roll core, and the welding machine can weld the confluence disc to the roll core. According to the welding mechanism, the first adsorption opening is formed in the welding pressing plate to adsorb the confluence disc of the cover plate, the second adsorption opening is formed to adsorb the top cover of the cover plate, the influence of the self weight of the top cover on adsorption of the confluence disc is reduced, and the stability of the adsorbed and transferred position of the confluence disc is effectively guaranteed; therefore, the position precision of butt joint of the confluence disc and the roll core is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a welding mechanism. Background Art

[0002] The production and manufacturing process of batteries involves multiple steps. At present, the widely used cylindrical batteries are usually processed by a winding manufacturing process. A positive current collector is formed at the positive end of the cylindrical battery core. In order to stably guide the current at the positive end of the core out of the battery cell, a busbar is welded on the end face of the positive current collector. At present, the existing welding equipment is a driving mechanism that drives the welding pressure head to absorb the busbar and the positive current collector for welding. However, in order to increase the production capacity of the battery, the busbar and the top cover are first assembled into a cover plate, and then the cover plate with the busbar is welded to the positive current collector, and then the core with the cover plate welded can be shelled. The prior art has the following defects: when the traditional welding pressure plate is adsorbed on the existing cover plate loaded with the busbar, the top cover is affected by its own gravity and drags the busbar to move, thereby affecting the connection position accuracy between the busbar and the core, and it is difficult to ensure the welding quality of the core and the cover plate. Utility Model Content

[0003] The utility model aims to provide a welding mechanism, which has a simple structure, and the welding pressing plate can absorb the top cover, and the cover plate transfer effect is good.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A welding mechanism is provided for welding a busbar of a cover plate to a winding core, comprising a first feeding device and a welding device, wherein the first feeding device is used to feed the winding core, and the central axis of the winding core extends along a first direction; the welding device and the first feeding device are spaced apart along the first direction, and the welding device comprises a docking assembly and a welding machine, and the docking assembly comprises a first driving member and a welding pressure plate, and the welding pressure plate has a first side surface for adsorbing the busbar, and a first adsorption port for adsorbing the busbar and a second adsorption port for adsorbing the top cover of the cover plate are spaced apart on the first side surface, the first adsorption port and the second adsorption port are both connected to an external negative pressure device, and a plurality of welding holes are also penetrated on the first side surface, the first driving member is transmission-connected to the welding pressure plate to adsorb and drive the cover plate to move and press the busbar against the winding core, and the welding machine can weld the busbar to the winding core through the welding holes.

[0006] As a preferred scheme of the welding mechanism, the first side is provided with a first adsorption groove relative to the busbar and a second adsorption groove relative to the top cover, the first adsorption port and the welding hole are both arranged at the bottom of the first adsorption groove, and all the welding holes are evenly distributed around the periphery of the first adsorption port, and the second adsorption port is arranged at the bottom of the second adsorption groove.

[0007] As a preferred scheme of the welding mechanism, the welding pressure plate also has a second side surface set at an angle with the first side surface, the second side surface is provided with a plurality of first connecting ports, and each welding hole is provided with a second connecting port on the hole wall away from the first adsorption port, each of the second connecting ports is connected to a corresponding first connecting port through an inflation channel, and the first connecting port is used to connect to an external inert gas inflation device, and part of the inflation channel includes a first channel and a second channel set at an angle and an arc-shaped connecting channel, the first channel is connected to the first connecting port, the second channel is connected to the second connecting port, and the first channel is connected to the second channel through the connecting channel.

[0008] As a preferred solution of the welding mechanism, the first loading device includes a second driving member and two clamping blocks arranged at intervals along a second direction, at least one of the clamping blocks is connected to the second driving member to clamp or release the winding core, wherein the first direction is arranged at an angle to the second direction.

[0009] As a preferred scheme of the welding mechanism, the welding mechanism also includes a second loading device, the second loading device includes a conveyor line and a jig, the transmission direction of the conveyor line extends along a third direction, a plurality of jigs are arranged at intervals along the third direction on the conveyor line, the jig is used to carry the core, the first loading device can load the core to the welding position for welding, the conveyor line has loading positions arranged at intervals along the second direction below the welding position, the second driving member can push the clamping block to lift the core at the loading position to the welding position and clamp it, wherein the first direction, the second direction and the third direction are arranged at angles to each other.

[0010] As a preferred solution of the welding mechanism, the welding mechanism also includes a sensing member, which is arranged at intervals along the first direction on the side of the welding position away from the welding device, and the first driving member pushes the welding pressure plate to drive the busbar to press against the winding core, and the sensing member senses the pressing force of the winding core, and the sensing member is signal-connected to the first driving member.

[0011] As a preferred solution of the welding mechanism, the welding mechanism also includes a third loading device, which includes a third driving member and a suction cup. The third driving member is transmission-connected to the suction cup, so that the suction cup adsorbs the external cover plate and moves it along the third direction to the welding position adjacent to the welding device side, and the first driving member drives the welding plate to move along the first direction to adsorb the cover plate on the suction cup.

[0012] As a preferred solution of the welding mechanism, at least one of the sides where the two clamping blocks are adjacent to each other is provided with a plurality of clamping grooves spaced apart along a third direction, and the clamping grooves are used to clamp the winding core. The welding device also includes a fourth driving member, which is transmission-connected to the welding machine, and the fourth driving member can move the welding machine along the third direction to weld each of the winding cores.

[0013] As a preferred solution of the welding mechanism, the docking assembly also includes a mounting plate, which is arranged at the driving end of the first driving member, the welding pressure plate is arranged on the mounting plate, and a avoidance hole and a dust removal channel are opened on the mounting plate, the welding hole is located in the avoidance hole, the dust removal channel is connected with the avoidance hole, and the dust removal channel is connected to an external dust removal device through a dust removal pipe.

[0014] As a preferred solution of the welding mechanism, the docking assembly also includes a material receiving box, which is arranged at the driving end of the first driving member and located below the welding pressure plate along the second direction. The material receiving box is recessed with a receiving groove, and the receiving groove is used to receive welding debris.

[0015] The beneficial effects of the utility model are as follows: the winding core is automatically fed by the first feeding device, and the first driving member is used to drive the welding pressure plate to adsorb the busbar of the cover plate to correspond to the winding core, and welding is performed by the welding machine, with a high degree of automation, which effectively ensures the production efficiency of the battery; a first adsorption port is set on the welding pressure plate to adsorb the busbar of the cover plate, and a second adsorption port is set to adsorb the top cover of the cover plate, thereby reducing the influence of the top cover's own weight on the adsorption of the busbar, and effectively ensuring the position stability of the busbar being adsorbed and transferred, thereby ensuring the position accuracy of the busbar and the winding core, improving the welding quality between the busbar of the winding core and the cover plate, and ensuring the quality of battery production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below based on the drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of a welding mechanism of an embodiment of the utility model;

[0018] Figure 2It is a structural schematic diagram of a welding device according to an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a welding pressure plate of an embodiment of the utility model;

[0020] Figure 4 It is a cross-sectional view of a welding pressure plate according to an embodiment of the utility model.

[0021] In the figure:

[0022] 100, cover plate; 101, busbar; 102, top cover; 200, winding core;

[0023] 1. First feeding device; 11. Second driving member; 12. Clamping block; 2. Welding device; 21. Docking assembly; 211. First driving member; 212. Welding plate; 2121. First side; 2122. First adsorption port; 2123. Second adsorption port; 2124. Welding hole; 2125. First adsorption slot; 2126. Second adsorption slot; 2127. Second side; 2128. First connecting port; 2129. Second connecting port; 213. Mounting plate; 214. Dust removal pipe; 215. Receiving box; 2151. Receiving slot; 216. Inflating channel; 2161. First channel; 2162. Connecting channel; 2163. Second channel; 22. Welding machine; 23. Fourth driving member; 3. Induction member; 4. Third feeding device; 41. Third driving member; 42. Suction cup. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the welding mechanism of the embodiment of the utility model is used to weld the busbar 101 of the cover plate 100 to the winding core 200, and includes a first feeding device 1 and a welding device 2. The first feeding device 1 is used to feed the winding core 200, and the central axis of the winding core 200 extends along a first direction (the first direction is the X direction shown in the figure); the welding device 2 is spaced apart from the first feeding device 1 along the first direction, and the welding device 2 includes a docking assembly 21 and a welding machine 22. The docking assembly 21 includes a first driving member 211 and a welding pressing plate 212. The welding pressing plate 212 has a first side surface 212 for adsorbing the busbar 101. 1. A first suction port 2122 for adsorbing the busbar 101 and a second suction port 2123 for adsorbing the top cover 102 of the cover plate 100 are arranged at intervals on the first side surface 2121. The first suction port 2122 and the second suction port 2123 are both connected to the external negative pressure device. A plurality of welding holes 2124 are also penetrated on the first side surface 2121. The first driving member 211 is transmission-connected with the welding pressing plate 212 to adsorb and drive the cover plate 100 to move and press the busbar 101 against the winding core 200. The welding machine 22 can weld the busbar 101 to the winding core 200 through the welding holes 2124.

[0029] It can be understood that the winding core 200 is automatically fed by the first feeding device 1, and the first driving member 211 drives the welding plate 212 to adsorb the busbar 101 of the cover plate 100 to correspond to the winding core 200, and the welding is performed by the welding machine 22, which has a high degree of automation and effectively ensures the production efficiency of the battery; by setting a first adsorption port 2122 on the welding plate 212 to adsorb the busbar 101 of the cover plate 100, and setting a second adsorption port 2123 to adsorb the top cover 102 of the cover plate 100, the influence of the weight of the top cover 102 itself on the adsorption of the busbar 101 is reduced, and the position stability of the busbar 101 being adsorbed and transferred is effectively ensured, thereby ensuring the position accuracy of the busbar 101 docking with the winding core 200, improving the welding quality between the winding core 200 and the busbar 101 of the cover plate 100, and ensuring the quality of battery production.

[0030] Furthermore, if Figure 3 As shown, the first side surface 2121 is provided with a first adsorption groove 2125 relative to the busbar 101 and a second adsorption groove 2126 relative to the top cover 102, the first adsorption port 2122 and the welding hole 2124 are both arranged at the bottom of the first adsorption groove 2125, and all the welding holes 2124 are evenly arranged around the periphery of the first adsorption port 2122, and the second adsorption port 2123 is arranged at the bottom of the second adsorption groove 2126. By setting the first adsorption groove 2125, the busbar 101 can be inserted into the first adsorption groove 2125, and the adsorption stability and position accuracy of the welding pressure plate 212 on the busbar 101 are improved. Similarly, the setting of the second adsorption groove 2126 can improve the adsorption stability and position accuracy of the welding pressure plate 212 on the top cover 102, and prevent the top cover 102 from slipping and driving the overall cover plate 100 to move.

[0031] Furthermore, if Figure 3 and Figure 4 As shown, the welding pressure plate 212 also has a second side surface 2127 set at an angle to the first side surface 2121, and the second side surface 2127 is provided with a plurality of first connecting ports 2128. A second connecting port 2129 is respectively opened on the hole wall of each welding hole 2124 away from the first adsorption port 2122, and each second connecting port 2129 is respectively connected to a corresponding first connecting port 2128 through an inflation channel 216, and the first connecting port 2128 is used to connect to an external inert gas inflation device. Part of the inflation channel 216 includes a first channel 2161 and a second channel 2163 set at an angle and an arc-shaped connecting channel 2162, the first channel 2161 is connected to the first connecting port 2128, the second channel 2163 is connected to the second connecting port 2129, and the first channel 2161 is connected to the second channel 2163 through the connecting channel 2162.

[0032] It is understandable that by setting the first connecting port 2128 on the second side 2127, it is convenient for the first connecting port 2128 to be connected to the external inert gas charging device through the connecting pipe, reducing the confusion of the connecting pipe. Compared with the traditional method of connecting all welding holes 2124 with one connecting pipe, it is easy to cause insufficient gas filling or even gas cut-off of each welding hole 2124 due to the different lengths of the charging channel 216. The design of each welding hole 2124 being individually controlled through a second connecting port 2129 can ensure that the amount of inert gas in each welding hole 2124 is sufficient, thereby ensuring the welding quality of the busbar 101 and the winding core 200. The connection transition between the first channel 2161 and the second channel 2163 using the arc-shaped connecting channel 2162 can effectively improve the smoothness of the connection between the first channel 2161 and the second channel 2163, making the input of the inert gas smoother and more stable.

[0033] In some embodiments, Figure 1 As shown, the first feeding device 1 includes a second driving member 11 and two clamping blocks 12 spaced apart along a second direction (the second direction is the Y direction shown in the figure, i.e., the vertical direction), at least one clamping block 12 is connected to the second driving member 11 to clamp or release the winding core 200, wherein the first direction and the second direction are arranged at an angle. In this embodiment, the second direction is the vertical direction, and the second driving member 11 drives the clamping block 12 to clamp the winding core 200 to ensure the welding position stability of the winding core 200.

[0034] Furthermore, the welding mechanism also includes a second feeding device, which includes a conveyor line and a fixture. The conveying direction of the conveyor line extends along a third direction (the third direction is the Z direction shown in the figure). A plurality of fixtures are arranged at intervals along the third direction on the conveyor line. The fixture is used to carry the core 200. The first feeding device 1 can feed the core 200 to the welding position for welding. The conveyor line has a feeding position arranged at intervals below the welding position along the second direction. The second driving member 11 can push the clamping block 12 to lift the core 200 at the feeding position to the welding position and clamp it, wherein the first direction, the second direction and the third direction are arranged at an angle to each other. In this embodiment, the first direction, the second direction and the third direction are arranged perpendicular to each other. By using the transmission of the conveyor line, the automatic feeding of the core 200 and the flow of the combined structure of the core 200 and the cover plate 100 after welding can be realized, thereby improving the continuous production capacity of the welding mechanism. In this embodiment, the conveyor line adopts chain transmission, that is, two chains arranged at intervals along the first direction are used to support the two ends of the core 200 through a fixture. The second driving member 11 is arranged under the chain, and the second driving member 11 is used to lift the upper material position core 200 to avoid the welding process being affected by the chain, thereby ensuring the stability of the welding of the core 200.

[0035] It should be noted that in the present solution, the two clamping blocks 12 are respectively provided with a second driving member 11, that is, the lower second driving member 11 pushes a clamping block 12 to lift the battery at the loading position to the welding position, and the upper second driving member 11 drives the clamping block 12 to clamp the core 200. The core 200 has a low strength, so in order to avoid the second driving member 11 pushing the clamping block 12 to clamp the core 200 excessively and cause damage. The welding mechanism also includes a sensor 3, which is arranged at intervals along the first direction on the side of the welding position away from the welding device 2. The first driving member 211 pushes the welding pressure plate 212 to drive the busbar 101 to press against the core 200. The sensor 3 senses the pressing force of the core 200, and the sensor 3 is connected to the first driving member 211 by signal. That is, the winding core 200 can be pushed against the sensing member 3 under the push of the welding pressure plate 212, and the sensing member 3 feeds back to the first driving member 211 when sensing the set numerical pressure, and the first driving member 211 stops driving, ensuring that the winding core 200 is pressed against the busbar 101, and at the same time, ensuring the structural stability of the winding core 200, and avoiding damage to the winding core 200 and affecting the battery production quality. The sensing member 3 can directly use a pressure sensor.

[0036] Furthermore, the welding mechanism further includes a third feeding device 4, which includes a third driving member 41 and a suction cup 42. The third driving member 41 is in transmission connection with the suction cup 42, so that the suction cup 42 absorbs the external cover plate 100 and then moves it to the side of the welding device 2 adjacent to the welding position along the third direction, and the first driving member 211 drives the welding pressing plate 212 to move along the first direction to absorb the cover plate 100 on the suction cup 42. Through the provision of the third feeding device 4, the automatic feeding of the busbar 101 can be realized, and the convenience of the docking assembly 21 in feeding the cover plate 100 is improved. That is, after the third driving member 41 drives the suction cup 42 to adsorb the cover plate 100 to the side of the welding device 2 adjacent to the welding position, the first driving member 211 drives the welding pressure plate 212 to move along the first direction to adsorb the cover plate 100 on the suction cup 42, the suction cup 42 releases the adsorption of the cover plate 100, and the third driving member 41 drives the suction cup 42 to adsorb the next external cover plate 100. During this process, the first driving member 211 drives the welding pressure plate 212 to move along the first direction close to the winding core 200, so that the busbar 101 of the cover plate 100 is abutted against the winding core 200, thereby improving the mobility of the cover plate 100 with the busbar 101. When the first driving member 211 pushes the busbar 101 of the cover plate 100 to press against the winding core 200, the third driving member 41 can push the suction cup 42 to load the next cover plate 100, thereby reducing the beat stagnation time.

[0037] In this embodiment, at least one of the sides of the two clamping blocks 12 adjacent to each other is provided with a plurality of clamping grooves at intervals along the third direction, and the core 200 is clamped in the clamping grooves. The welding device 2 further includes a fourth driving member 23, which is in transmission connection with the welding machine 22, so that the welding machine 22 moves along the third direction to weld each core 200. By providing the clamping grooves, the rolling of the core 200 can be avoided, and the stability of the movement of the clamping block 12 to the core 200 can be improved. By providing a plurality of clamping grooves, a plurality of welding pressing plates 212 are provided at the driving end of the first driving member 211 and a plurality of suction cups 42 are provided at the driving end of the third driving member 41, so that the welding of a plurality of cores 200 can be realized, and the fourth driving member 23 is used to drive the welding machine 22 to move, and the plurality of cores 200 are welded one by one, so as to improve the utilization rate of the welding machine 22 and the production efficiency of the battery.

[0038] Furthermore, if Figure 2 As shown, the docking assembly 21 also includes a mounting plate 213, which is arranged at the driving end of the first driving member 211, and the welding plate 212 is arranged on the mounting plate 213, and a avoidance hole and a dust removal channel are opened on the mounting plate 213, and the welding hole 2124 is located in the avoidance hole, and the dust removal channel is connected to the avoidance hole, and the dust removal channel is connected to the external dust removal device through the dust removal pipe 214. The avoidance hole is connected to the external dust removal device through the dust removal pipe 214 to make the avoidance hole negative pressure, and impurities such as dust generated by welding can be extracted during laser welding, so as to avoid the dust from affecting the welding quality, and to avoid the dust from escaping and causing equipment failure, thereby improving the safety of the welding mechanism. And taking the welding of four cores 200 at a time as an example, four welding platens 212 are arranged on the mounting plate 213 along the third direction at intervals, and four avoidance holes are arranged on the mounting plate 213, and each avoidance hole is connected to the dust removal pipe 214 through a dust removal channel.

[0039] Furthermore, the docking assembly 21 also includes a material receiving box 215, which is arranged at the driving end of the first driving member 211 and is located below the welding plate 212 along the second direction. The material receiving box 215 is recessed with a receiving groove 2151, which is used to receive welding debris and improve the welding environment of the welding mechanism. It should be noted that in order to ensure the transfer accuracy, the first driving member 211, the second driving member 11, the third driving member 41 and the fourth driving member 23 can all be in the form of electric cylinders, or in the form of linear motors combined with screw transmission, which is not limited too much here.

[0040] The overall welding principle of this welding mechanism is as follows: the conveyor line conveys the winding core 200 to the loading position, the second driving member 11 drives the clamping block 12 to lift the winding core 200 at the loading position to the welding position along the second direction, and at the same time the third driving member 41 drives the suction cup 42 to absorb the external cover plate 100 and move it along the third direction to the side of the welding position adjacent to the welding device 2, the first driving member 211 drives the welding pressing plate 212 to move along the first direction and absorb the cover plate 100 on the suction cup 42, the suction cup 42 stops absorption and is driven by the third driving member 41 to return along the third direction, and the first The driving member 211 drives the welding pressing plate 212 to continuously move along the first direction so that the busbar 101 of the cover plate 100 abuts against the winding core 200, and the winding core 200 abuts against the induction member 3. The induction member 3 feedback controls the first driving member 211 to stop, and the fourth driving member 23 drives the welding machine 22 to weld one by one. After the welding is completed, the fourth driving member 23 and the first driving member 211 return to their original positions, and the second driving member 11 drives the clamping block 12 to move down along the second direction so that the winding core 200 of the welded cover plate 100 is put back on the conveyor line, and so on. Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not limitations on the implementation methods of the utility model. For ordinary technicians in the relevant field, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the utility model. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A welding mechanism for welding a busbar of a cover plate to a winding core, characterized in that: include: A first loading device, the first loading device is used to load the winding core, and the central axis of the winding core extends along a first direction; A welding device, wherein the welding device and the first feeding device are spaced apart along the first direction, the welding device comprises a docking assembly and a welding machine, the docking assembly comprises a first driving member and a welding pressure plate, the welding pressure plate has a first side surface for adsorbing the busbar, a first adsorption port for adsorbing the busbar and a second adsorption port for adsorbing the top cover of the cover plate are spaced apart on the first side surface, the first adsorption port and the second adsorption port are both connected to an external negative pressure device, a plurality of welding holes are also penetrated on the first side surface, the first driving member is transmission-connected to the welding pressure plate to adsorb and drive the cover plate to move and press the busbar against the winding core, and the welding machine can weld the busbar to the winding core through the welding holes.

2. The welding mechanism according to claim 1, characterized in that: The first side surface is provided with a first adsorption groove relative to the bus plate and a second adsorption groove relative to the top cover, the first adsorption port and the welding hole are both arranged at the bottom of the first adsorption groove, and all the welding holes are evenly distributed around the periphery of the first adsorption port, and the second adsorption port is arranged at the bottom of the second adsorption groove.

3. The welding mechanism according to claim 1, characterized in that: The welding platen also has a second side surface set at an angle to the first side surface, and a plurality of first connecting ports are opened on the second side surface. A second connecting port is opened on the hole wall of each welding hole away from the first adsorption port, and each of the second connecting ports is connected to a corresponding first connecting port through an inflation channel. The first connecting port is used to connect to an external inert gas inflation device. Part of the inflation channel includes a first channel and a second channel set at an angle and an arc-shaped connecting channel. The first channel is connected to the first connecting port, the second channel is connected to the second connecting port, and the first channel is connected to the second channel through the connecting channel.

4. The welding mechanism according to claim 1, characterized in that: The first loading device includes a second driving member and two clamping blocks spaced apart along a second direction, at least one of the clamping blocks is connected to the second driving member to clamp or release the winding core, wherein the first direction is arranged at an angle to the second direction.

5. The welding mechanism according to claim 4, characterized in that: It also includes a second loading device, which includes a conveyor line and a jig. The transmission direction of the conveyor line extends along a third direction. A plurality of jigs are arranged at intervals along the third direction on the conveyor line, and the jig is used to carry the core. The first loading device can load the core to the welding position for welding. The conveyor line has loading positions arranged at intervals along the second direction below the welding position. The second driving member can push the clamping block to lift the core at the loading position to the welding position and clamp it, wherein the first direction, the second direction and the third direction are arranged at angles to each other.

6. The welding mechanism according to claim 5, characterized in that: It also includes a sensing member, which is spaced apart along the first direction at a side of the welding position away from the welding device. The first driving member pushes the welding pressure plate to drive the busbar to press against the winding core. The sensing member senses the pressing force of the winding core, and the sensing member is connected to the first driving member by signal.

7. The welding mechanism according to claim 5, characterized in that: It also includes a third loading device, which includes a third driving member and a suction cup. The third driving member is connected to the suction cup in a transmission manner so that the suction cup adsorbs the external cover plate and moves it along the third direction to the welding position adjacent to the welding device side. The first driving member drives the welding plate to move along the first direction to adsorb the cover plate on the suction cup.

8. The welding mechanism according to claim 4, characterized in that: At least one of the sides where the two clamping blocks are adjacent to each other is provided with a plurality of clamping grooves spaced apart along a third direction, and the clamping grooves are used to clamp the winding core. The welding device also includes a fourth driving member, which is transmission-connected to the welding machine, and the fourth driving member can move the welding machine along the third direction to weld each winding core.

9. The welding mechanism according to any one of claims 1 to 8, characterized in that: The docking assembly also includes a mounting plate, which is arranged at the driving end of the first driving member, and the welding pressure plate is arranged on the mounting plate. A avoidance hole and a dust removal channel are opened on the mounting plate, the welding hole is located in the avoidance hole, and the dust removal channel is connected to the avoidance hole. The dust removal channel is connected to an external dust removal device through a dust removal pipe.

10. The welding mechanism according to any one of claims 1 to 8, characterized in that: The docking assembly also includes a material receiving box, which is arranged at the driving end of the first driving member and below the welding pressure plate along the second direction. A receiving groove is recessed on the material receiving box, and the receiving groove is used to receive welding debris.

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