Lithium battery shell laser welding machine

Abstract

The utility model relates to the technical field of lithium battery processing, in particular to a lithium battery shell laser welding machine which comprises a welding machine body, a round base is installed in a working bin of the welding machine body through a rotating shaft, and a plurality of round grooves are formed in the position, close to the peripheral edge, of the top face of the round base. The multiple circular grooves are installed in the peripheral direction of the circular base at equal angles, and the multiple clamping mechanisms are installed at the top of the circular base and fixedly connected to the exteriors of the multiple circular grooves correspondingly. Two positioning extrusion wheels and a sliding extrusion wheel of the clamping mechanism are matched to extrude the outer wall of the cylindrical shell to limit the position of the cylindrical shell on the horizontal plane, the cylindrical shell is in contact with a circular groove on the bottom surface of the cylindrical shell and is completely limited, and compared with a two-point clamping and fixing mode, the stability is higher; and the welding quality of the cylindrical shell in the subsequent welding process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery processing technology, specifically a lithium battery casing laser welding machine. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and a non-aqueous electrolyte solution. They are an important portable energy storage device. Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. The production of energy storage lithium batteries and the installation volume of power lithium batteries for new energy vehicles have both achieved significant growth. The production process of lithium battery casings requires laser welding.

[0003] For example, patent publication number CN219074696U discloses a laser welding machine for lithium battery processing, including a support frame. A processing table is fixed to the upper surface of the support frame, and a laser welding assembly is fixed to the upper surface of the processing table. The upper surface of the processing table is provided with a protective mechanism for facilitating the protection of the lithium battery. The upper surface of the support frame is provided with a positioning mechanism for facilitating the transport and positioning of the lithium battery. The protective mechanism includes two support plates fixed to the upper surface of the processing table, and a first electric push rod is fixed to one side of each of the two support plates. This laser welding machine for lithium battery processing, through the protective mechanism and the cooperation between the support plates, the first electric push rod, the protective plates, and the processing groove, can protect the lithium battery except for the positive and negative electrode welding points when the lithium battery is transported under the laser welding assembly. This prevents damage caused by laser welding deviation to the lithium battery casing, improving the protection effect and safety performance.

[0004] In the above structure, after the conveying platform transports the lithium battery to the designated position, the push plate positions and adjusts the lithium battery and fixes it. This fixing process is mainly achieved by squeezing and clamping the lithium battery between the two side positioning plates and protective pads. However, the lithium battery shell is mostly cylindrical, and this two-point clamping method may not be able to guarantee the stability of the process, affecting the subsequent laser welding quality.

[0005] Therefore, a laser welding machine for lithium battery casings is proposed to address the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies and the problem that the cylindrical shape of lithium battery casings makes the two-point clamping method potentially unstable during the process and affecting the quality of subsequent laser welding, a laser welding machine for lithium battery casings is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A lithium battery casing laser welding machine of this utility model includes a welding machine body. A circular base is mounted inside the working chamber of the welding machine body via a rotating shaft. Multiple circular grooves are formed on the top surface of the circular base near its outer periphery. These circular grooves are installed at equal angles along the outer periphery of the circular base. Multiple clamping mechanisms are mounted on the top of the circular base. Each clamping mechanism is fixedly connected to the outside of the multiple circular grooves. Each clamping mechanism includes a clamping frame and... The clamping slide has positioning extrusion wheels vertically mounted at both ends of the top of the clamping frame via a rotating shaft. L-shaped brackets are fixedly connected to both ends of the clamping frame on the side furthest from the center of the circular base. Fixed guide rods slide through the sleeves at both ends of the clamping slide. One end of each of the two fixed guide rods is perpendicularly fixed to the center of the side wall of the two L-shaped brackets. A sliding extrusion wheel is fixedly connected to the side wall of the clamping slide near the clamping frame via a bracket. A cylindrical housing is fitted between the sliding extrusion wheel and the two positioning extrusion wheels, and the cylindrical housing is located above the circular groove.

[0008] Preferably, a connecting plate is fixed between one end of the two fixed guide rods, and a compression spring is fitted on the outside of each of the two fixed guide rods. The compression spring is located between the connecting plate and the adjacent side wall of the clamping slide.

[0009] Preferably, a positioning groove is provided at the center of the bottom surface of the clamping slide.

[0010] Preferably, a lifting base is installed inside the working chamber of the welding machine body, and the lifting base is located outside one of the clamping mechanisms.

[0011] Preferably, a lifting plate is fixedly connected to the lifting output end of the lifting base, and one end of the inclined wall of the lifting plate can contact the inclined surface of the control groove.

[0012] Preferably, a pressing base is installed inside the working chamber of the welding machine body, and the pressing base is located outside another clamping mechanism.

[0013] Preferably, a pressing cylinder is vertically mounted at one end of the pressing base, and the pressing cylinder is located at the upper projection of one of the cylindrical housings.

[0014] Preferably, the output end of the pressure cylinder is fixedly connected to a pressure cylinder, which can contact the top of the cylindrical housing.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, the two positioning extrusion wheels and the sliding extrusion wheel of the clamping mechanism work together to squeeze the outer wall of the cylindrical shell to limit its position on the horizontal plane. Furthermore, the bottom surface of the cylindrical shell is in contact with the circular groove, which completely limits its position. This method is more stable than the two-point clamping and fixing method, and ensures the welding quality of the cylindrical shell in the subsequent welding process. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a perspective view of the internal structure of the main processing chamber of the welding machine in this utility model;

[0020] Figure 3 This is a perspective view of the clamping mechanism, lifting base, and pressing base working together in this utility model;

[0021] Figure 4 This is a perspective view of the clamping mechanism and the lifting plate in this utility model;

[0022] Figure 5 This is a perspective view of the clamping mechanism in this utility model, taken from below.

[0023] Legend:

[0024] 1. Welding machine body; 2. Circular base; 21. Circular groove; 3. Clamping mechanism; 31. Clamping frame; 32. Clamping slide; 311. Positioning extrusion wheel; 312. L-shaped bracket; 321. Fixed guide rod; 322. Sliding extrusion wheel; 4. Cylindrical housing; 323. Connecting plate; 324. Extrusion spring; 325. Control groove; 5. Lifting base; 51. Lifting plate; 6. Pressing base; 61. Pressing cylinder; 611. Pressing cylinder. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Specific implementation examples are given below.

[0027] Please see Figure 1 - Figure 5 This utility model provides a laser welding machine for lithium battery casings, including a welding machine body 1. A circular base 2 is mounted inside the working chamber of the welding machine body 1 via a rotating shaft. Multiple circular grooves 21 are formed on the top surface of the circular base 2 near its outer periphery. These grooves are equally spaced along the outer periphery of the circular base 2. Multiple clamping mechanisms 3 are mounted on the top of the circular base 2, each fixed to the outside of one of the circular grooves 21. Each clamping mechanism 3 includes a clamping frame 31 and a clamping slide 32. Positioning extrusion wheels 311 are vertically mounted at both ends of the top of the clamping frame 31 via rotating shafts. L-shaped brackets 312 are fixedly connected to both ends of the side away from the center of the circular base 2. Fixed guide rods 321 slide through the sleeves at both ends of the clamping slide 32. One end of each fixed guide rod 321 is perpendicularly fixed to the center of the side wall of the two L-shaped brackets 312. A sliding extrusion wheel 322 is fixedly connected to the side wall of the clamping slide 32 near the clamping frame 31 via a bracket. A cylindrical housing 4 is fitted between the sliding extrusion wheel 322 and the two positioning extrusion wheels 311. The cylindrical housing 4 is located above the circular groove 21. A connecting plate 323 is fixedly connected between one end of each of the two fixed guide rods 321. The exterior of each of the two fixed guide rods 321 is... The assembly includes a compression spring 324, located between the adjacent side walls of the connecting plate 323 and the clamping slide 32. Within the processing chamber of the welding machine body 1, multiple cylindrical shells 4 are clamped and fixed by the interaction between the circular groove 21 on the circular base 2 and the components of the clamping mechanism 3. The intermittent rotation of the circular base 2 allows for step-by-step displacement of the clamped cylindrical shells 4, moving them one by one to the welding station for welding. The clamping frame 31 is fixed to the fixed guide rod 321 via an L-shaped bracket 312, thereby allowing the clamping slide 32, which slides between the outer walls of the fixed guide rod 321, to... The mutual compression between the sliding extrusion roller 322 and the two positioning extrusion rollers 311 on its side wall achieves a three-point clamping fixation of the cylindrical shell 4, thus fixing the position of the cylindrical shell 4 on the horizontal plane by the clamping mechanism 3. The compression spring 324 located between the connecting plate 323 and the clamping slide 32 provides an elastic force for the clamping slide 32 to move towards the position of the positioning extrusion rollers 311, thereby providing an elastic force for the sliding extrusion rollers 322 to drive the cylindrical shell 4 to compress towards the two positioning extrusion rollers 311. The circular groove 21 located outside the projection below the cylindrical shell 4 provides a supporting force after contacting the bottom surface of the cylindrical shell 4.

[0028] like Figure 3 , Figure 4 and Figure 5As shown, a control groove 325 is provided at the center of the bottom surface of the clamping slide 32. A lifting base 5 is installed in the working chamber of the welding machine body 1. The lifting base 5 is located outside one of the clamping mechanisms 3. A lifting plate 51 is fixedly connected to the lifting output end of the lifting base 5. One end of the lifting plate 51 can contact the inclined surface of the control groove 325. Due to the elastic compression force of the compression spring 324, the sliding compression wheel 322 has an elastic force to move towards the positioning compression wheel 311. This makes it impossible for the cylindrical shell 4 to be filled into the fixed position when the clamping mechanism 3 needs to install it. Between the positioning extrusion roller 311 and the sliding extrusion roller 322, the lifting plate 51 installed on the lifting base 5, under the lifting force of the lifting cylinder, can provide the clamping slide block 32 with an output force that overcomes the elastic force of the extrusion spring 324 through the contact sliding between its top inclined surface and the control groove 325. At this time, the sliding extrusion roller 322 moves outward to the cylindrical housing 4 and can be inserted between the sliding extrusion roller 322 and the positioning extrusion roller 311. After that, the lifting plate 51 returns to its original position. At this time, the sliding extrusion roller 322 and the positioning extrusion roller 311 cooperate in the horizontal position to limit the position of the cylindrical housing 4.

[0029] like Figure 3 As shown, a pressing base 6 is installed inside the working chamber of the welding machine body 1. The pressing base 6 is located outside another clamping mechanism 3. A pressing cylinder 61 is vertically installed at one end of the pressing base 6. The pressing cylinder 61 is located at the upper projection of one of the cylindrical shells 4. A pressing cylinder 611 is fixed to the output end of the pressing cylinder 61. The pressing cylinder 611 can contact the top of the cylindrical shell 4. After being horizontally fixed, the cylindrical shell 4 is rotated step by step by the clamping mechanism 3 into the range of action of the pressing base 6. At this time, the pressing cylinder 61 can drive the pressing cylinder 611 to squeeze the top of the cylindrical shell 4 until the bottom of the cylindrical shell 4 contacts the circular groove 21. Then the pressing cylinder 611 returns to its original position. At this time, the cylindrical shell 4 is completely constrained. Then the stepping rotation of the clamping mechanism 3 can drive the cylindrical shell 4 to move to the welding station of the welding machine body 1 for welding work.

[0030] Working principle: Within the processing chamber of the welding machine body 1, multiple cylindrical shells 4 are clamped and fixed by the cooperation between the circular groove 21 on the circular base 2 and the components of the clamping mechanism 3. The intermittent rotation of the circular base 2 allows for step-by-step displacement of the clamped cylindrical shells 4, moving them one by one to the welding station for welding. The clamping frame 31 is fixed to the fixed guide rod 321 by the L-shaped bracket 312, thereby allowing the clamping slide 32, which slides between the outer walls of the fixed guide rod 321, to slide the extrusion roller 3 through its side wall. The mutual compression between the 22 and the two positioning compression rollers 311 achieves a three-point clamping fixation of the cylindrical shell 4, thus fixing the position of the clamping mechanism 3 on the cylindrical shell 4 on the horizontal plane. The compression spring 324 located between the connecting plate 323 and the clamping slide 32 provides an elastic force for the clamping slide 32 to move towards the position of the positioning compression rollers 311. Because the sliding compression roller 322 possesses an elastic force to move towards the positioning compression rollers 311 under the elastic compression force of the compression spring 324, this allows the clamping mechanism 3 to fix the cylindrical shell 4 at three points when needed. 4. During installation, it cannot be filled between the positioning extrusion wheel 311 and the sliding extrusion wheel 322. At this time, the lifting plate 51 installed on the lifting base 5, under the lifting force of the lifting cylinder, can provide the clamping slide block 32 with an output force that overcomes the elastic force of the extrusion spring 324 through the contact sliding between its top inclined surface and the control groove 325. At this time, the sliding extrusion wheel 322 moves outward to the cylindrical housing 4 and can be inserted between the sliding extrusion wheel 322 and the positioning extrusion wheel 311. After that, the lifting plate 51 returns to its original position. At this time, the sliding extrusion wheel 322 and the positioning extrusion wheel 311 are in a position to be filled between the positioning extrusion wheel 311 and the positioning extrusion wheel 322. 311 is used to position the cylindrical housing 4 in a horizontal position. After being fixed horizontally, the cylindrical housing 4 is rotated step by step by the clamping mechanism 3 into the range of action of the pressing base 6. At this time, the pressing cylinder 61 can drive the pressing cylinder 611 to squeeze the top of the cylindrical housing 4 until the bottom of the cylindrical housing 4 contacts the circular groove 21. Then the pressing cylinder 611 returns to its original position. At this time, the cylindrical housing 4 is completely constrained. Then the stepping rotation of the clamping mechanism 3 can drive the cylindrical housing 4 to move to the welding station of the welding machine body 1 for welding work.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A laser welding machine for lithium battery casings, comprising a welding machine body (1), characterized in that: A circular base (2) is mounted inside the working chamber of the welding machine body (1) via a rotating shaft. Multiple circular grooves (21) are formed on the top surface of the circular base (2) near its outer periphery. These grooves (21) are installed at equal angles along the outer periphery of the circular base (2). Multiple clamping mechanisms (3) are mounted on the top of the circular base (2). Each clamping mechanism (3) is fixed to the outside of one of the circular grooves (21). Each clamping mechanism (3) includes a clamping frame (31) and a clamping slide (32). Positioning extrusion wheels (311) are vertically mounted on both ends of the top of the clamping frame (31) via a rotating shaft. The clamping frame (31) has two L-shaped brackets (312) fixedly connected to both ends on the side away from the center of the circular base (2). Fixed guide rods (321) slide through the sleeves at both ends of the clamping slide (32). One end of the two fixed guide rods (321) is perpendicularly fixed to the center of the side wall of the two L-shaped brackets (312). The clamping slide (32) has a sliding extrusion wheel (322) fixedly connected to the side wall of the clamping frame (31) through a bracket. A cylindrical shell (4) is fitted between the sliding extrusion wheel (322) and the two positioning extrusion wheels (311). The cylindrical shell (4) is located above the circular groove (21).

2. The lithium battery casing laser welding machine according to claim 1, characterized in that: A connecting plate (323) is fixed between one end of the two fixed guide rods (321), and a compression spring (324) is fitted on the outside of each of the two fixed guide rods (321). The compression spring (324) is located between the connecting plate (323) and the adjacent side wall of the clamping slide (32).

3. A lithium battery casing laser welding machine according to claim 2, characterized in that: The clamping slide (32) has a control groove (325) at the center of its bottom surface.

4. A lithium battery casing laser welding machine according to claim 1, characterized in that: The welding machine body (1) has a lifting base (5) installed in its working chamber, and the lifting base (5) is located outside one of the clamping mechanisms (3).

5. A lithium battery casing laser welding machine according to claim 4, characterized in that: The lifting output end of the lifting base (5) is fixedly connected to a lifting plate (51), and one end of the inclined wall of the lifting plate (51) can contact the inclined surface of the control groove (325).

6. A lithium battery casing laser welding machine according to claim 1, characterized in that: The welding machine body (1) has a pressure base (6) installed in its working chamber, and the pressure base (6) is located outside another clamping mechanism (3).

7. A lithium battery casing laser welding machine according to claim 6, characterized in that: A downward pressure cylinder (61) is vertically mounted on one end of the downward pressure base (6), and the downward pressure cylinder (61) is located at the upper projection of one of the cylindrical housings (4).

8. A lithium battery casing laser welding machine according to claim 7, characterized in that: The output end of the pressure cylinder (61) is fixedly connected to a pressure cylinder (611), which can contact the top of the cylindrical housing (4).

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