Side plate welding equipment for soft package battery cell

Abstract

The invention relates to the technical field of soft package battery cell manufacturing equipment, and discloses soft package battery cell side plate welding equipment which comprises a welding rack and an automatic welding manipulator arranged on one side of the welding rack, a welding platform is arranged on the welding rack, and a positioning assembly for positioning a workpiece is arranged on the welding platform; the positioning assembly comprises fixing seats, clamping plates and a cover plate, the four sides of the preset positions of the workpiece are each provided with one fixing seat, one clamping plate is arranged between the two fixing seats opposite in the longitudinal direction in parallel, one clamping plate is also arranged between the two fixing seats opposite in the transverse direction in parallel, and the clamping plates slide towards the workpiece; a plurality of gas pipes are arranged on the fixing seat and the clamping plate close to one side of a welding seam of the workpiece, the gas pipes are connected with an external high-purity nitrogen source and are distributed along the track of the welding seam of the workpiece, and gas outlets of the gas pipes are aligned to the welding seam of the workpiece. The soft package battery cell welding device has the effect of improving the soft package battery cell welding quality.

Description

Technical Field

[0001] The present application relates to the technical field of soft-pack battery cell manufacturing equipment, and in particular to a side plate welding device for a soft-pack battery cell. Background Art

[0002] Soft-pack batteries have been widely used in consumer electronics, electric vehicles and other fields due to their high energy density, light weight and customizability. With the continuous improvement of battery performance requirements in these fields, the production process of soft-pack batteries has gradually become one of the research focuses. Especially in the production process of soft-pack batteries, the welding link between the side panel and the box body is particularly important because it directly affects the quality and safety of the product. At present, soft-pack batteries are increasingly widely used in the market, and the demand for high-quality and high-reliability welding is becoming more and more urgent.

[0003] In the prior art, in order to achieve the welding between the side plate of the soft-pack battery cell and the box body, the method usually adopted is to manually splice the side plate and the box body, clamp and fix them with a mechanical clamp, and then use automatic welding equipment to align the joints to be welded on the workpiece for welding. In addition, there are some improved methods, such as using laser welding to replace traditional resistance welding, or using a visual inspection system to assist positioning and improve welding accuracy. However, these methods still have some shortcomings.

[0004] Although existing welding equipment and technology can basically meet the welding requirements of soft-pack batteries, there are still many challenges in actual operation. For example, the traditional manual positioning method makes it difficult to ensure the precise docking of the soft-pack battery box body and the side panel during welding, especially when the size is small and the precision requirements are high. It is easy to have problems such as weld offset and loose weld joints. In addition, the high temperature generated during the welding process will cause the metal material to oxidize and form an oxide layer, thereby reducing the strength and conductivity of the weld joint, while increasing the risk of electrolyte leakage. These problems seriously affect the quality and reliability of soft-pack batteries. Summary of the invention

[0005] In order to improve the welding quality of soft-pack battery cells, the present application provides a side plate welding device for soft-pack battery cells.

[0006] The side plate welding equipment of a soft-pack battery cell provided in this application adopts the following technical solution: A side panel welding device for a soft-pack battery cell comprises a welding frame and an automatic welding manipulator arranged on one side of the welding frame, the welding frame is provided with a welding platform, the welding platform is provided with a positioning component for positioning the workpiece, the positioning component comprises a fixed seat, a clamping plate slidably arranged on the fixed seat, and a cover plate that covers the fixed seat and the clamping plate together, the fixed seat is provided with one on each of the four sides of the preset position of the workpiece, the clamping plate is arranged in parallel between two fixed seats opposite to each other in the longitudinal direction, and one is also arranged in parallel between two fixed seats opposite to each other in the transverse direction, the clamping plate slides toward the workpiece and abuts the workpiece against the relative fixed seats, a plurality of air pipes are arranged on the fixed seat and the clamping plate close to one side of the weld of the workpiece, the plurality of air pipes are connected to an external high-purity nitrogen source, and are distributed along the trajectory of the weld of the workpiece, and the air outlets of the plurality of air pipes are aligned with the weld of the workpiece.

[0007] By adopting the above technical solution, the positioning assembly composed of the fixing seat, the clamping plate and the cover plate can ensure the precise fixation of the workpiece during the welding process, avoiding the problems of weld deviation and loose weld joints. The gas pipes are distributed along the trajectory of the workpiece weld, so that the high-purity nitrogen source is aimed at the workpiece weld through the evenly distributed gas pipes, and a protective atmosphere evenly covering the weld can be formed during the welding process, thereby reducing the oxidation of the metal material of the workpiece, improving the welding quality of the workpiece, and reducing the risk of electrolyte leakage.

[0008] Optionally, a plurality of air guide strips are provided on the fixing seat and the clamping plate on one side close to the weld of the workpiece, the air guide strips are in contact with the weld and are distributed along the edge of the weld, the air guide strips are provided with inclined air guide nozzles along their length direction, and the air guide nozzles are connected to a plurality of air pipes along their length direction to guide nitrogen to the weld.

[0009] By adopting the above technical solutions, the inclined air guide nozzle design allows nitrogen to cover the weld area more accurately, thereby effectively isolating oxygen, preventing metal materials from oxidizing at high temperatures, maintaining the strength and conductivity of the weld joint, and reducing the risk of electrolyte leakage. In addition, the design of the air guide strip fitting the weld also helps to stabilize the gas flow field, reduce the diffusion loss of nitrogen during transmission, improve the nitrogen protection effect, and further improve the welding quality and reliability.

[0010] Optionally, the air guide strip is made of copper.

[0011] By adopting the above technical solution, the air guide strip is made of copper, which can effectively improve the heat conduction efficiency, reduce the heat accumulation generated during welding, avoid material damage and oxidation problems caused by excessive temperature, and further improve the quality and reliability of the welded joint. In addition, the good ductility and fatigue resistance of copper also help to extend the service life of the equipment.

[0012] Optionally, an adjustment plate for adjusting an air outlet gap of the air guide nozzle is provided on the air guide strip, and the adjustment plate is hinged on a side wall of the air guide nozzle facing away from the workpiece.

[0013] By adopting the above technical solution, the setting of the adjustment plate can flexibly adjust the opening size of the air guide nozzle, so as to more accurately control the nitrogen flow rate, ensure that a suitable nitrogen protection environment can be provided under different welding conditions, prevent oxidation in the weld area, and improve the quality and reliability of the welded joint. The hinged design allows the adjustment plate to quickly adjust its position according to actual needs, enhancing the flexibility and adaptability of the equipment, and is suitable for welding operations of soft-pack batteries of various specifications and sizes.

[0014] Optionally, the air guide strip is provided with an adjustment component for controlling the flipping angle of the adjustment plate, the adjustment component includes an auxiliary push rod and a main push rod which are slidably inserted into the air guide strip, the end of the auxiliary push rod is rotatably connected to the adjustment plate via a hinge joint, the bottom end of the main push rod is fitted with an inclined surface of the end of the auxiliary push rod facing away from the hinge joint, when the main push rod moves downward, the auxiliary push rod is guided by the inclined surface to push the adjustment plate to flip to the side close to the workpiece, and the air outlet gap of the air guide nozzle is reduced.

[0015] By adopting the above technical solution, the cooperation of the main push rod and the auxiliary push rod can accurately control the flip angle of the adjustment plate, thereby effectively adjusting the air outlet gap of the air guide nozzle. This not only ensures the stability and uniformity of the nitrogen flow, but also can flexibly adjust the gas flow under different welding conditions, further improve the welding quality, and reduce the problems of weld deviation and loose welding joints.

[0016] Optionally, an elastic reset member is sleeved on the auxiliary push rod, and the elastic reset member is slidably set in the air guide strip. When the elastic reset member is in a natural state, the adjustment plate is fitted between the side wall of the air guide nozzle facing away from the workpiece.

[0017] By adopting the above technical solution, the elastic reset part can automatically reset after the adjustment plate is flipped, ensuring that the adjustment plate can be close to the side wall of the air guide nozzle when there is no need to adjust the air outlet gap, thereby improving the accuracy of adjusting the air outlet gap of the air guide nozzle.

[0018] Optionally, the top ends of several main push rods located in the same horizontal direction are commonly connected to a driving plate, a lifting assembly is provided between the driving plate and an adjacent fixed seat or clamping plate, a support seat is provided on the fixed seat or clamping plate adjacent to the driving plate, the lifting assembly includes a fixed rack vertically arranged on the support seat, a driving gear rotatably arranged on the driving plate, and a servo motor that drives several driving gears to rotate synchronously, and the driving gear corresponds to the rack one by one and is rotatably engaged.

[0019] By adopting the above technical solution, it is ensured that the air outlet gaps of all air guide nozzles can be adjusted synchronously The meshing structure of the fixed rack and the driving gear is used to drive the driving plate to rise and fall smoothly and accurately, so that several main push rods can move up and down synchronously, which is convenient for synchronously adjusting the air outlet gaps of several air guide nozzles in the same horizontal direction, improving the convenience of operation, ensuring the uniformity and stability of nitrogen flow, and avoiding the instability of nitrogen flow caused by mechanical vibration or deviation. The introduction of the servo motor realizes automatic control, which can adjust the nitrogen supply in real time according to the actual welding needs, improve welding efficiency and quality, and reduce human operation errors.

[0020] Optionally, a driven gear ring is rotatably provided on the vertically arranged wind guide strip, the driven gear ring is coaxially arranged with the main push rod and rotatably cooperates with it through a thread, a driving gear is sleeved on the end of the driving plate on which the rotating shaft of the driving gear extends, the driving gear and the driven gear ring are meshed and transmitted through multiple transmission gears, and the multiple transmission gears are rotatably provided on a fixed seat or a side wall of a clamping plate adjacent to the driving plate.

[0021] By adopting the above technical solution, the driven gear ring is coaxially arranged with the main push rod, and through the threaded rotation, the main push rod can drive the auxiliary push rod, thereby driving the adjustment plate to flip and adjust the air outlet gap of the air guide nozzle. The driving gear and the driven gear ring are meshed and driven through multiple transmission gears to achieve multi-level linkage, ensuring that the air outlet gaps of all air guide strips on the same fixed seat or clamping plate can be adjusted synchronously, improving the uniformity and stability of gas protection during welding, and further improving welding quality.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The positioning assembly consisting of the fixing seat, the clamping plate and the cover plate can ensure the precise fixation of the workpiece during the welding process, avoiding the problems of weld deviation and loose welding joints. The gas pipes are distributed along the trajectory of the workpiece weld, so that the high-purity nitrogen source is aimed at the workpiece weld through the evenly distributed gas pipes, which can form a protective atmosphere evenly covering the weld during the welding process, thereby reducing the oxidation of the metal material of the workpiece, improving the welding quality of the workpiece, and reducing the risk of electrolyte leakage; 2. The inclined air guide nozzle design allows nitrogen to cover the weld area more accurately, thereby effectively isolating oxygen, preventing metal materials from oxidizing at high temperatures, maintaining the strength and conductivity of the weld joint, and reducing the risk of electrolyte leakage. In addition, the design of the air guide strip fitting the weld also helps to stabilize the gas flow field, reduce the diffusion loss of nitrogen during transmission, improve the nitrogen protection effect, and further improve the welding quality and reliability; 3. The air guide strip is made of copper, which can effectively improve the heat conduction efficiency, reduce the heat accumulation generated during welding, and avoid material damage and oxidation problems caused by excessive temperature, thereby further improving the quality and reliability of the welded joint. In addition, the good ductility and fatigue resistance of copper also help to extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view showing the positional relationship between the welding frame and the workbench in the embodiment of the present application.

[0025] Figure 3 It is a cross-sectional view showing the connection relationship between the air duct and the air guide strip in the embodiment of the present application.

[0026] Figure 4 It is a cross-sectional view showing the connection relationship between the air guide strip and the adjustment plate in the embodiment of the present application.

[0027] Figure 5 It is a cross-sectional view showing the connection relationship between the driven gear ring and the main push rod on the vertically arranged wind guide strip in the embodiment of the present application.

[0028] Description of reference numerals: 1. Welding frame; 11. Guide roller; 12. Push cylinder; 2. Automatic welding manipulator; 3. Welding industrial control car; 31. Ejector; 311. Ejector plate; 3111. Plug-in socket; 3112. Ball bearing; 312. Guide column; 313. Ejector cylinder; 32. Positioning column; 4. Workbench; 41. Rotating seat; 42. Guide rod; 43. Worm gear reducer; 5. Welding platform; 6. Positioning assembly; 61. Fixed seat; 611. Support seat; 612. Transmission gear; 6 2. Clamping plate; 621. Positioning pin; 622. Quick clamp; 63. Cover plate; 631. Fastening screw; 632. Handle; 7. Air pipe; 71. Air guide strip; 711. Air guide nozzle; 712. Adjustment plate; 713. Driven gear ring; 8. Adjustment assembly; 81. Auxiliary push rod; 811. Elastic reset member; 82. Main push rod; 821. Drive plate; 9. Lifting assembly; 91. Fixed rack; 92. Driving gear; 921. Active gear; 93. Servo motor. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The embodiment of the present application discloses a side plate welding device for a soft-pack battery cell.

[0031] Reference Figure 1 and Figure 2 A side plate welding device for a soft-pack battery cell includes a welding frame 1 and an automatic welding manipulator 2. A welding industrial control vehicle 3 is slidably arranged in the welding frame 1 in the direction toward the automatic welding manipulator 2. A workbench 4 is arranged on the top of the welding industrial control vehicle 3. The workbench 4 covers the welding frame 1, and an ejector 31 for lifting the workbench 4 is arranged on the top of the welding frame 1. Two rotating seats 41 are fixedly arranged on the workbench 4. The two rotating seats 41 are distributed along the sliding direction of the welding industrial control vehicle 3, and a welding platform 5 is rotatably arranged between the two rotating seats 41. A positioning component 6 for positioning the workpiece is arranged on the welding platform 5. A plurality of air pipes 7 are also installed on the positioning component 6. The plurality of air pipes 7 are connected to an external high-purity nitrogen source and are distributed along the trajectory of the workpiece weld. The gas outlets of the plurality of air pipes 7 are aligned with the weld of the workpiece.

[0032] Reference Figure 1 and Figure 2 In the process of welding the side plate of the soft-pack battery cell, the workpiece is first effectively fixed by the positioning component 6, and then the welding control vehicle 3, the ejector 31, the rotating seat 41 and the automatic welding manipulator 2 are used to accurately weld the weld of the workpiece. A stable nitrogen protective atmosphere is provided during welding to prevent the metal material of the side plate from oxidizing at high temperature, thereby improving the strength and conductivity of the welded joint and reducing the risk of electrolyte leakage.

[0033] Reference Figure 1 and Figure 2 A guide roller 11 is rotatably arranged on the side wall of the welding frame 1 facing the welding industrial control vehicle 3, and the welding industrial control vehicle 3 rolls and fits with the guide roller 11 during the sliding process. A push cylinder 12 is also fixedly arranged on the welding frame 1, and the extension direction of the piston rod of the push cylinder 12 is parallel to the sliding direction of the welding industrial control vehicle 3, and the end of the piston rod is fixedly connected to the welding industrial control vehicle 3.

[0034] Reference Figure 1 and Figure 2 A plurality of positioning posts 32 are fixedly distributed on the top of the welding industrial control vehicle 3. Four of them are used as an example in this embodiment. The workbench 4 is sleeved on the four positioning posts 32 and vertically slides with each positioning post 32. A plurality of guide rods 42 are also plugged into the workbench 4. Two of them are used as an example in this embodiment. The guide rods 42 are vertically plugged into the workbench 4 and slide through the welding industrial control vehicle 3.

[0035] Reference Figure 1 and Figure 2The ejector 31 in this embodiment includes an ejector plate 311, a guide column 312 and an ejector cylinder 313. The ejector cylinder 313 is vertically arranged, and its cylinder body is fixedly arranged on the welding industrial control vehicle 3, and the top of the piston rod passes through the top of the welding industrial control vehicle 3. A guide column 312 is arranged on both sides of the cylinder body, and slides through the top of the welding industrial control vehicle 3. The ejector plate 311 is fixedly connected to the two guide columns 312 and the top of the piston rod, and is supported on the bottom of the workbench 4.

[0036] Reference Figure 2 A socket 3111 is fixedly provided on the top of the ejection plate 311 , a ball 3112 is rotatably embedded at the top of the socket 3111 , and the workbench 4 is plugged into and matched with the socket 3111 .

[0037] Reference Figure 1 A worm gear reducer 43 is fixedly arranged on the side wall of one of the rotating seats 41 away from the welding platform 5, and its output shaft is coaxially fixedly connected with the rotating shaft on the rotating seat 41 that drives the welding platform 5 to rotate.

[0038] Reference Figure 1 and Figure 2 When the workpiece needs to be lifted and lowered in cooperation with the automatic welding manipulator 2 during welding, the ejection cylinder 313 extends the piston rod, and the ejection plate 311 supports the workbench 4 to rise, thereby driving the welding platform 5 to rise synchronously. On the contrary, when the piston rod is retracted, the workpiece is synchronously lowered with gravity; when the workpiece needs to be translated, the piston rod of the ejection cylinder 313 is retracted until the ejection plate 311 is no longer in contact with the workbench 4, at which time the push cylinder 12 extends the piston rod, and under the rolling support of several guide rollers 11 and several balls 3112, the welding industrial control vehicle 3 slides away from the automatic welding manipulator 2, thereby driving the welding platform 5 to slide synchronously. On the contrary, when the piston rod is retracted, the workpiece is synchronously slid toward the direction of the automatic welding manipulator 2; when the workpiece needs to be flipped, the worm gear reducer 43 drives the welding platform 5 to flip a certain angle as needed, so as to better weld the workpiece weld.

[0039] Reference Figure 1 and Figure 2 The positioning assembly 6 includes a fixed seat 61, a clamping plate 62 and a cover plate 63. One fixed seat 61 is fixedly provided on each of the four sides of the preset position of the workpiece. One clamping plate 62 is provided in parallel between two fixed seats 61 opposite to each other in the longitudinal direction, and one clamping plate 62 is provided in parallel between two fixed seats 61 opposite to each other in the transverse direction. Both clamping plates 62 slide toward the workpiece and abut the workpiece against the relative fixed seats 61. A plurality of positioning pins 621 are fixedly provided on the side wall of the clamping plate 62 away from the workpiece. The plurality of positioning pins 621 slide out of the fixed seat 61, and a quick clamp 622 for locking the relative position of the fixed seat 61 and the clamping plate 62 is installed between the plurality of positioning pins 621.

[0040] Reference Figure 1 and Figure 2 The cover plate 63 covers the top of the fixing seat 61 and the clamping plate 62, and is connected to the fixing seat 61 by a fastening screw 631 through a thread. A handle 632 is fixedly provided on the top of the cover plate 63 for easy carrying.

[0041] Reference Figure 2 and Figure 3 A plurality of copper air guide strips 71 are fixedly arranged on the fixing seat 61 and the clamping plate 62 on the side close to the weld of the workpiece. A plurality of air pipes 7 are distributed and installed on the side walls of the fixing seat 61 and the clamping plate 62 away from the air guide strip 71. The air guide strip 71 is provided with inclined air guide nozzles 711 along its length direction. The air guide nozzles 711 are connected to a plurality of air pipes 7 along its length direction to guide nitrogen to the weld.

[0042] Reference Figure 3 and Figure 4 , an adjustment plate 712 is provided on the air guide strip 71, and the adjustment plate 712 is hinged on the side wall of the air guide nozzle 711 away from the workpiece, and an adjustment assembly 8 is provided on the air guide strip 71. The adjustment assembly 8 includes an auxiliary push rod 81 and a main push rod 82, both of which are slidably arranged on the air guide strip 71, and the end of the auxiliary push rod 81 is rotatably connected to the adjustment plate 712 through a hinge joint, and an elastic reset member 811 is sleeved on the auxiliary push rod 81. The elastic reset member 811 in this embodiment is a compression spring as an example, and the compression spring slides and abuts between the inner side wall of the air guide strip 71 and the raised side wall of the auxiliary push rod 81. The bottom end of the main push rod 82 is in contact with the inclined surface of the end of the auxiliary push rod 81 away from the hinge joint.

[0043] Reference Figure 3 and Figure 4 The top ends of several main push rods 82 located in the same horizontal direction are fixedly connected to a driving plate 821. A lifting assembly 9 is arranged between the driving plate 821 and the adjacent fixing seat 61 or the clamping plate 62. A supporting seat 611 is also fixedly arranged on the adjacent fixing seat 61 or the clamping plate 62.

[0044] Reference Figure 3 The lifting assembly 9 includes a fixed rack 91, a driving gear 92 and a servo motor 93. The fixed rack 91 is vertically fixed on the side wall of the support seat 611. The driving gear 92 is rotatably arranged on the driving plate 821, corresponding to and rotatably meshing with the rack. In this embodiment, two driving gears 92 are taken as an example, and their rotating shafts are coaxially arranged. The servo motor 93 is located between the two driving gears 92 and is a double-axis arrangement. It is fixedly arranged on the driving plate 821 and is coaxially fixedly connected with the rotating shafts of the two driving gears 92.

[0045] Reference Figure 3 and Figure 5A driven gear ring 713 is rotatably provided on the side wall of the vertically arranged wind guide strip 71. The driven gear ring 713 is coaxially arranged with the main push rod 82, and the two are rotatably matched through threads. A driving gear 92 is fixedly sleeved on the end of the driving plate 821 extending from the rotating shaft of the driving gear 92. The driving gear 921 and the driven gear ring 713 are meshed and transmitted through a plurality of transmission gears 612. The plurality of transmission gears 612 are rotatably provided on the side wall of the fixed seat 61 or the clamping plate 62 adjacent to the driving plate 821.

[0046] The implementation principle of the side plate welding device of a soft-pack battery cell in the embodiment of the present application is as follows: in the process of welding the side plate of the soft-pack battery cell, the workpiece is first effectively fixed by the fixing seat 61, the sliding clamping plate 62 and the cover plate 63 to ensure its stability and accuracy during the welding process. During welding, a stable nitrogen protective atmosphere is provided to the weld of the workpiece through the air pipe 7 and the air guide strip 71.

[0047] The nitrogen flow requirements for different welding parameters and workpiece characteristics are different, and the servo motor 93 is controlled to work, so as to adjust the air outlet gap of the air guide nozzle 711 in real time. The servo motor 93 drives the driving gear 92 to rotate, so as to accurately control the up and down movement of the driving plate 821 under the meshing guidance of the fixed rack 91. When the driving plate 821 moves downward, the main push rod 82 moves downward synchronously, and the auxiliary push rod 81 follows the inclined surface to push the adjustment plate 712 to flip to the side close to the workpiece, and the air outlet gap of the air guide nozzle 711 is reduced. On the contrary, under the action of the compression spring, the adjustment plate 712 automatically returns to the initial position when it is not affected by external force, and maintains the best air outlet state of the air guide nozzle 711. It improves the flexibility and adaptability of welding, and can better control the nitrogen flow rate to ensure that the nitrogen concentration around the weld is always in the optimal state.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A side plate welding device for a soft-pack battery cell, comprising a welding frame (1) and an automatic welding manipulator (2) arranged on one side of the welding frame (1), characterized in that The welding frame (1) is provided with a welding platform (5), and the welding platform (5) is provided with a positioning component (6) for positioning the workpiece. The positioning component (6) includes a fixed seat (61), a clamping plate (62) slidably arranged on the fixed seat (61), and a cover plate (63) that covers the fixed seat (61) and the clamping plate (62) together. The fixed seat (61) is provided with one on each of the four sides of the preset position of the workpiece. One of the clamping plates (62) is arranged in parallel between two fixed seats (61) opposite to each other in the longitudinal direction, and one of the clamping plates (62) is arranged in parallel between two fixed seats (61) opposite to each other in the transverse direction. The clamping plate (62) slides toward the workpiece and abuts the workpiece against the opposite fixed seat (61). A plurality of air pipes (7) are arranged on the fixed seat (61) and the clamping plate (62) on one side of the workpiece weld. The plurality of air pipes (7) are connected to an external high-purity nitrogen source and are distributed along the trajectory of the workpiece weld. The gas outlets of the plurality of air pipes (7) are aligned with the weld of the workpiece.

2. The side plate welding equipment of the soft-pack battery cell according to claim 1 is characterized in that A plurality of air guide strips (71) are arranged on a fixing seat (61) and a clamping plate (62) on a side close to the weld of the workpiece. The air guide strips (71) are in contact with the weld and are distributed along the edge of the weld. The air guide strips (71) are provided with oblique air guide nozzles (711) along their length direction. The air guide nozzles (711) are connected to a plurality of air pipes (7) along their length direction to guide nitrogen to the weld.

3. The side plate welding equipment of the soft-pack battery cell according to claim 2 is characterized in that , the air guide strip (71) is made of copper.

4. The side plate welding equipment of the soft-pack battery cell according to claim 2 is characterized in that The air guide strip (71) is provided with an adjustment plate (712) for adjusting the air outlet gap of the air guide nozzle (711), and the adjustment plate (712) is hinged on the side wall of the air guide nozzle (711) facing away from the workpiece.

5. The side plate welding equipment of the soft-pack battery cell according to claim 4 is characterized in that The air guide strip (71) is provided with an adjustment component (8) for controlling the flipping angle of the adjustment plate (712). The adjustment component (8) comprises an auxiliary push rod (81) and a main push rod (82) which are slidably arranged on the air guide strip (71). The end of the auxiliary push rod (81) is rotatably connected to the adjustment plate (712) through a hinge joint. The bottom end of the main push rod (82) is in contact with the inclined surface of the end of the auxiliary push rod (81) away from the hinge joint. When the main push rod (82) moves downward, the auxiliary push rod (81) is guided by the inclined surface to push the adjustment plate (712) to flip to the side close to the workpiece, and the air outlet gap of the air guide nozzle (711) is reduced.

6. The side plate welding equipment of a soft-pack battery cell according to claim 5, characterized in that: The auxiliary push rod (81) is sleeved with an elastic reset member (811), and the elastic reset member (811) is slidably arranged in the air guide strip (71). When the elastic reset member (811) is in a natural state, the adjustment plate (712) is arranged to fit between the side wall of the air guide nozzle (711) facing away from the workpiece.

7. The side plate welding equipment of the soft-pack battery cell according to claim 5, characterized in that The top ends of a plurality of main push rods (82) located in the same horizontal direction are commonly connected to a driving plate (821); a lifting assembly (9) is provided between the driving plate (821) and an adjacent fixed seat (61) or a clamping plate (62); a support seat (611) is provided on the fixed seat (61) or the clamping plate (62) adjacent to the driving plate (821); the lifting assembly (9) comprises a fixed rack (91) vertically arranged on the support seat (611), a driving gear (92) rotatably arranged on the driving plate (821), and a servo motor (93) for driving a plurality of driving gears (92) to rotate synchronously; the driving gears (92) correspond to the racks one by one and are rotatably engaged with each other.

8. The side plate welding equipment of the soft-pack battery cell according to claim 7, characterized in that A driven gear ring (713) is rotatably arranged on a vertically arranged wind guide strip (71), the driven gear ring (713) is coaxially arranged with the main push rod (82) and is rotatably matched through a thread, a driving gear (921) is sleeved on the end of the rotating shaft of the driving gear (92) extending out of the driving plate (821), the driving gear (921) and the driven gear ring (713) are meshed and transmitted through a plurality of transmission gears (612), and the plurality of transmission gears (612) are rotatably arranged on a fixed seat (61) or a side wall of a clamping plate (62) adjacent to the driving plate (821).

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