Lithium battery welding and packaging equipment

Abstract

The utility model belongs to the technical field of battery packaging, and particularly relates to lithium battery welding and packaging equipment which comprises a base, a three-axis moving platform connected to the base and a laser welding part fixedly connected to the Z-axis moving end of the three-axis moving platform. A cover body is further fixedly connected to the upper end of the base, and an opening is formed in one side of the cover body; the inner wall of the opening is connected with two door bodies, the inner wall of the opening is further connected with an oxygen reducing and surging preventing assembly, the oxygen reducing and surging preventing assembly comprises a top base fixedly connected to the inner wall of the opening, an air inlet groove formed in the top base and two air curtain machines fixedly connected to the lower end of the top base, and the input ends of the air curtain machines communicate with the air inlet groove; a closed working environment can be formed in the cover body, external air (oxygen) is prevented from entering the cover body, a low-oxygen environment in the cover body can be kept during welding, oxidation of a welding area caused by high oxygen content in the welding environment is avoided in the welding process, and the welding quality is guaranteed.

Description

Technical Field

[0001] This application relates to the field of battery packaging technology, specifically to a lithium battery welding and packaging equipment. Background Technology

[0002] Lithium battery packaging refers to the physical sealing of various components of a lithium battery (such as battery cells, protection circuits, separators, etc.) through a certain process to ensure the safety, stability and long life of the battery. Welding the lithium battery cover plate to the lithium battery casing is also a type of packaging.

[0003] Existing welding and packaging equipment generally uses laser welding to package lithium battery components. For example, existing technology (Chinese invention patent application with publication number CN118321718A) discloses a precision welding and packaging equipment for lithium battery production, which uses laser welding to achieve precise welding of lithium battery electrodes. Although the welding and packaging equipment in the existing technology can achieve welding and packaging of lithium battery components, it does not have the function of anti-oxidation. If the oxygen content in the welding environment is high, it may cause oxidation of the welding area, resulting in welding defects (such as porosity, cracks, etc.), thereby affecting the welding quality. Utility Model Content

[0004] The purpose of this application is to provide a lithium battery welding and packaging device to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a lithium battery welding and packaging device, comprising a base, a three-axis moving platform connected to the base, and a laser welding unit fixed to the Z-axis moving end of the three-axis moving platform.

[0006] The upper end of the base is also fixedly connected to a cover, and an opening is provided on one side of the cover. Two doors are connected to the inner wall of the opening, and an oxygen reduction and anti-surge component is also connected to the inner wall of the opening. The oxygen reduction and anti-surge component includes a top seat fixedly connected to the inner wall of the opening, an air inlet slot opened inside the top seat, and two air curtain machines fixedly connected to the lower end of the top seat. The input end of the air curtain machine is connected to the air inlet slot.

[0007] In one embodiment, the base has two exhaust ducts inside, and the two exhaust ducts are located directly below the output ends of the two air curtain machines, and the inner walls of the two exhaust ducts are fixed with exhaust units.

[0008] In one embodiment, baffles are rotatably connected to the inner walls of both exhaust duct outlets.

[0009] In one embodiment, a circular hollow frame is fixed to one side of the Z-axis moving end of the three-axis moving platform, and the laser welding part is located inside the circular hollow frame. Two nozzles are symmetrically connected to the outer surface of the circular hollow frame. A pump body is fixed to the upper end of the cover, and the output end of the pump body is connected to the input end of the two nozzles through a pipe.

[0010] In one embodiment, the upper end of the base is connected to a positioning component, and the positioning component includes two cylinders symmetrically fixed to the upper end of the base, two sets of sliding grooves symmetrically opened on the upper end of the base, and two clamping plates that are slidably connected in the two sets of sliding grooves respectively, and the telescopic ends of the two cylinders are respectively fixed to one side of the two clamping plates.

[0011] In one embodiment, an infrared sensor is fixed to the inner wall of the opening.

[0012] Compared with the prior art, the beneficial effects of this application are:

[0013] 1) This application features a cover, with the three-axis moving platform and laser welding unit all located inside the cover. The cover creates a closed working environment, restricting the entry of external air (oxygen). This maintains a low-oxygen environment inside the cover during welding, preventing oxidation of the welding area caused by high oxygen content in the welding environment and ensuring welding quality.

[0014] 2) This application incorporates oxygen reduction and anti-surge components and designs an air curtain machine at the opening of the enclosure. When the door is opened for material handling or feeding, the air curtain machine can effectively reduce the possibility of oxygen entering the enclosure and reduce the impact of oxygen rushing into the enclosure on welding quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a schematic diagram of the positioning components, three-axis moving platform, annular hollow frame, and nozzle structure of this application;

[0017] Figure 3 This is a schematic diagram of the opening, infrared sensing part, and top seat structure of this application;

[0018] Figure 4 This is a sectional view of the base and cover of this application.

[0019] In the diagram: 1. Base; 2. Cover; 21. Opening; 22. Infrared sensor; 3. Door; 4. Oxygen reduction and anti-surge assembly; 41. Top seat; 42. Air curtain machine; 43. Baffle; 44. Exhaust unit; 45. Exhaust duct; 46. Inlet duct; 5. Three-axis moving platform; 6. Laser welding unit; 7. Annular hollow frame; 8. Nozzle; 9. Pipe; 10. Pump body; 11. Positioning assembly; 111. Cylinder; 112. Clamping plate; 113. Slide. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Example:

[0023] Please see Figure 1-4 This application provides a technical solution: a lithium battery welding and packaging device, including a base 1, a three-axis moving platform 5 (XYZ high-precision moving platform, also known as a three-coordinate high-precision moving platform, which is a platform that achieves precise movement in the X, Y, and Z directions, and belongs to mature prior art) connected to the base 1, and a laser welding part 6 (composed of a laser that generates a laser beam, a focal lens that focuses the laser beam onto the welding area, etc., laser welding is a mature prior art, and will not be described in detail here) fixed to the Z-axis moving end of the three-axis moving platform 5.

[0024] The upper end of the base 1 is also fixed to a cover 2, and an opening 21 is opened on one side of the cover 2. Two doors 3 are connected to the inner wall of the opening 21. A sealing gasket is necessarily provided on the outer surface of the door 3 to seal the gap between the door 3 and the opening 21, so as to prevent external air from entering the interior of the cover 2 through the gap between the door 3 and the opening 21. The three-axis moving platform 5 and the laser welding part 6 are both located inside the cover 2. The cover 2 can form a closed working environment, restricting the entry of external air (oxygen). It can maintain a low oxygen environment inside the cover 2 during welding, and avoid oxidation of the welding area caused by high oxygen content in the welding environment during the welding process, thus ensuring the quality of welding.

[0025] like Figure 3 and Figure 4 As shown, an infrared sensor 22 is fixedly connected to the inner wall of the opening 21 (a transmitter is installed on one side of the inner wall of the opening 21 and a receiver is installed on the other side. The transmitter and receiver are located on both sides of the opening. When an object passes through, it blocks the light beam, and the sensor can detect the object entering or leaving. By emitting an infrared light beam and monitoring the reflected light, it can detect whether the object passes through the light beam). An oxygen reduction and anti-surge component 4 is also connected to the inner wall of the opening 21. The oxygen reduction and anti-surge component 4 includes a top seat 41 fixedly connected to the inner wall of the opening 21, an air inlet slot 46 opened inside the top seat 41, and two air curtain machines 42 fixedly connected to the lower end of the top seat 41. The input end of the air curtain machine 42 is connected to the air inlet slot 46. Two exhaust slots 45 are opened inside the base 1, and the two exhaust slots 45 are located directly below the output ends of the two air curtain machines 42. An exhaust fan 44 (an exhaust fan can be selected in this embodiment) is fixedly connected to the inner wall of each of the two exhaust slots 45. Each of the two exhaust ducts 45 has a baffle 43 rotatably connected to its inner wall via a torsion spring.

[0026] By setting up the above scheme, when the door 3 is opened, the lithium battery parts that need to be welded and packaged enter the inside of the cover 2 through the opening 21 or the lithium battery parts that have been welded and packaged inside the cover 2 are taken out of the cover 2 through the opening 21. The infrared sensor 22 can sense the entry and exit of the object. At this time, the infrared sensor 22 sends a signal to the air curtain machine 42 and the exhaust unit 44. The air curtain machine 42 draws the air inside the cover 2 into the air curtain machine 42 through the air inlet slot 46 and then discharges it to form an air curtain. The air discharged from the air curtain machine 42 can be drawn out by the exhaust unit 44 and discharged into the exhaust slot 45. When the air enters the exhaust slot 45, it can blow the baffle 43 to rotate, thereby opening the opening at the bottom of the exhaust slot 45 and discharging the gas. In this way, when picking up or feeding materials, the possibility of oxygen entering the inside of the cover 2 can be effectively reduced, and the impact of oxygen rushing into the inside of the cover 2 during picking up or feeding materials on the welding quality can be reduced.

[0027] like Figure 1 and Figure 2As shown, a circular hollow frame 7 is fixedly connected to one side of the Z-axis moving end of the three-axis moving platform 5, and the laser welding part 6 is located inside the circular hollow frame 7. Two nozzles 8 are symmetrically connected to the outer surface of the circular hollow frame 7. A pump body 10 is fixedly connected to the upper end of the cover 2, and the output end of the pump body 10 is connected to the input end of the two nozzles 8 through a pipe 9. The input end of the pump body 10 is connected to the gas supply unit through a gas pipe. The pump body 10 can pump the inert gas (nitrogen can be used, which is low cost) discharged from the gas supply unit. The gas is fed into pipe 9, enters nozzle 8 through pipe 9, and is discharged from nozzle 8. The inert gas can be blown near the welding area, thereby protecting the welding area with protective gas (such as nitrogen or argon) during the welding process to prevent oxidation. At the same time, the gas discharged from nozzle 8 can also remain inside the enclosure 2. Even if the gas inside the enclosure 2 is discharged outward by the air curtain 42 and the exhaust unit 44, the oxygen content inside the enclosure 2 can still be reduced by continuing to supply inert gas to the enclosure 2 through pump 10.

[0028] The upper end of the base 1 is connected to a positioning component 11, which includes two cylinders 111 symmetrically fixed to the upper end of the base 1, two sets of sliding grooves 113 symmetrically opened on the upper end of the base 1, and two clamping plates 112 respectively slidably connected in the two sets of sliding grooves 113. The telescopic ends of the two cylinders 111 are respectively fixed to one side of the two clamping plates 112. The operation of the cylinders 111 can drive the clamping plates 112 to move. The two clamping plates 112 are used to clamp and position the lithium battery parts to be welded.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this application. It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or basic characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this application is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all variations falling within the meaning and scope of equivalents of the claims within this application, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery welding packaging device, comprising a base (1), a three-axis moving platform (5) connected to the base (1), and a laser welding part (6) fixed to the Z-axis moving end of the three-axis moving platform (5), characterized in that: the upper end of the base (1) is further fixed with a cover (2), one side of the cover (2) is provided with an opening (21), two door bodies (3) are connected to the inner wall of the opening (21), and an oxygen reduction and surge prevention assembly (4) is further connected to the inner wall of the opening (21), the oxygen reduction and surge prevention assembly (4) comprises a top seat (41) fixed to the inner wall of the opening (21), an air inlet groove (46) formed in the top seat (41), and two air curtain machines (42) fixed to the lower end of the top seat (41), and the input end of the air curtain machine (42) is in communication with the air inlet groove (46).

2. A lithium battery welding and packaging apparatus according to claim 1, characterized in that: Two exhaust grooves (45) are formed in the base (1), and the two exhaust grooves (45) are respectively located directly below the output ends of the two air curtain machines (42), and the inner walls of the two exhaust grooves (45) are both fixed with an air extraction part (44).

3. A lithium battery welding and packaging apparatus according to claim 2, wherein: The inner walls of the air outlet openings of the two exhaust grooves (45) are both rotatably connected with a baffle (43) through a torsion spring.

4. The lithium battery welding and packaging apparatus of claim 3, wherein: The Z-axis moving end of the three-axis moving platform (5) is fixed with a ring-shaped hollow frame (7), and the laser welding part (6) is located in the interior of the ring-shaped hollow frame (7), the outer surface of the ring-shaped hollow frame (7) is symmetrically connected with two spray heads (8), the upper end of the cover (2) is fixed with a pump body (10), and the output end of the pump body (10) is connected with the input ends of the two spray heads (8) through a pipeline (9).

5. A lithium battery welding encapsulation apparatus as claimed in claim 4, wherein: The upper end of the base (1) is connected with a positioning assembly (11), and the positioning assembly (11) comprises two air cylinders (111) symmetrically fixed to the upper end of the base (1), two groups of sliding grooves (113) symmetrically formed in the upper end of the base (1), and two clamping plates (112) respectively slidably connected in the two groups of sliding grooves (113), and the extension ends of the two air cylinders (111) are respectively fixed to one side of the two clamping plates (112).

6. A lithium battery welding encapsulation apparatus as claimed in claim 5, wherein: The inner wall of the opening (21) is fixed with an infrared induction part (22).

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