Battery cell packaging and welding device for lithium battery

Abstract

The invention relates to the technical field of welding, and discloses a lithium battery cell package welding device which comprises a workbench, welding frames are fixed to the two sides of the top of the workbench, welding heads used for welding are movably arranged on the tops of the welding frames, and the bottoms of the welding frames move back and forth on the two sides of the workbench through rotation of threaded rods. A welding plate is slidably connected to the top of the workbench, a plurality of welding openings for placing battery cell strips are formed in the surface of the welding plate, and an attaching mechanism is arranged at the top of the welding plate and located around the welding openings; by arranging a rotating wheel I, when the clamping block vertically descends along the inclined surface of the moving block, the rotating wheel I makes contact with the inclined surface of the moving block, friction force can be reduced, and abrasion is avoided; and through the arrangement of balls, the smoothness of the sliding block I moving in the sliding groove II can be improved, blocking is avoided, the battery cell strip and the battery can be placed on one welding plate, covering of two welding plates is not needed, the operation process is reduced, and the welding accuracy is improved.

Description

Technical Field

[0001] The invention relates to the field of welding, in particular to a cell packaging welding device for lithium batteries. Background Art

[0002] Cell welding is a key step in the battery manufacturing process, which involves firmly connecting the various parts of the battery together to ensure the normal operation and performance of the battery. In the cell soft connection welding, the welding materials commonly used are metal materials with good conductivity and high temperature resistance, such as tin wire, etc. These materials are melted by heating during the welding process, and chemically react with the polar materials of the cell to form a strong connection.

[0003] During the conventional battery cell welding operation, the battery cells are first neatly placed on the surface of the welding plate, and then the battery is placed on another welding plate to be fixed, and then the welding plate with the battery is placed on the welding plate with the battery cells and aligned with the ends of the battery cells, and finally the battery cells and the battery are welded through the welding port.

[0004] During operation, the battery and the battery cell strip need to be placed separately, and the battery welding plate must be placed in a uniform size so that it can be aligned with the welding position of the battery cell strip. However, when using batteries of different sizes, it is difficult for the battery end and the battery cell strip end to align by themselves; therefore, during welding, inaccurate welding position will affect later use.

[0005] In view of this, the present invention solves the above technical problems by proposing a lithium battery cell packaging welding device. Summary of the invention

[0006] In view of the shortcomings of the above-mentioned background technology, the present invention provides a technical solution for a lithium battery cell packaging welding device, which can be used to place the cell strips and batteries on one welding plate without the need for two welding plates to cover each other, thereby reducing the operating procedures and improving the accuracy of welding, thereby solving the problems raised in the above-mentioned background technology.

[0007] The present invention provides the following technical solution: a lithium battery cell packaging welding device, comprising a workbench, welding frames are fixed on both sides of the top of the workbench, a welding head for welding is movably provided on the top of the welding frame, the bottom of the welding frame is rotated by a threaded rod to move back and forth on both sides of the workbench, and a welding plate is slidably connected to the top of the workbench.

[0008] The surface of the welding plate is provided with a plurality of welding ports for placing battery core strips, and a fitting mechanism is provided on the top of the welding plate and around the welding ports, and the fitting mechanism comprises a lifting plate and a lifting block, and the lifting plate is slidably connected to the surface of the welding plate between the two welding ports through a connecting rod I, and the end of the connecting rod I is fixedly connected to the lifting plate, and the lifting block is slidably installed inside the welding plate, and a connecting rod II is fixed on the surface of the lifting block, and a clamping block is fixed at the bottom of the connecting rod II, and a rotating wheel I is rotatably connected to the lower surface of the clamping block, and a slide groove I is provided on the surface of the welding plate, and a moving block is movably arranged inside the slide groove I, and when the rotating wheel I descends and contacts the oblique side surface of the moving block, the top position of the slide groove I is partially closed.

[0009] A spring I is fixed to the top of the other end of the connecting rod I, and the top of the spring I is fixed in a partially closed position with the top of the slide groove I. The fitting mechanism also includes a clamping assembly.

[0010] As a preferred technical solution of the present invention, the clamping assembly includes a rotating ring, the inner wall of the rotating ring is fixed with circumferentially distributed push blocks, the push blocks are provided with a fixed block III and a slider II on the top of the welding plate, the fixed block III is fixed to the top of the welding plate, the slider II is slidably connected to the top of the welding plate, and a spring II is fixed between the fixed block III and the slider II.

[0011] As a preferred technical solution of the present invention, a clamping block is fixed on the top of the slider II, a connecting block is fixed on the top of the clamping block, the rotating ring is rotatably connected to the top of the fixed block III, and the pushing block contacts the connecting block with the rotating surface of the rotating ring to push the clamping block and the slider II located on the top of the welding plate to move.

[0012] As a preferred technical solution of the present invention, there is a notch on the surface of the rotating ring and an oblique groove is opened near the notch. A connecting rod III is fixed on the top of the connecting rod I. The outer wall of the connecting rod III is rotatably connected to a rotating wheel II. The connecting rod III rises and falls with the connecting rod I, and the rotating wheel II is located in the oblique groove and slides to push the rotating ring to rotate.

[0013] As a preferred technical solution of the present invention, a slide groove II is provided at both ends of the welding plate, a clamping groove is provided in the middle of the slide groove II, the clamping groove and the slide groove II are in a cross shape, a slider I is slidably connected inside the slide groove II, a support frame is rotatably connected to the surface of the slider I, and clamping blocks are elastically connected to the upper and lower ends of the slider I.

[0014] As a preferred technical solution of the present invention, a ball is rotatably connected inside the card block, a gear is connected between the two card blocks, a fixed block I is fixed to the front surface of the card block, a fixed block II is fixed to the lower surface of the fixed block I, and two fixed rods are fixed on both sides of the slider I.

[0015] As a preferred technical solution of the present invention, the surface of the fixed rod is slidingly connected to a limiting block, the limiting block is a right-angled trapezoidal structure, the inner wall of the slider I is rotatably connected to a gear, the middle position of the gear passes through the outside of the slider I and is connected to the end of the support frame, and the gear is meshed with the limiting block.

[0016] As a preferred technical solution of the present invention, the slider I is located in the slide groove II and slides to the slot position, and the card block is ejected by the gear and engages with the slot.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The inclined surface of the push block contacts the rotating wheel I to push the clamping block forward in the direction of the battery to stably clamp the battery, so that the battery and the battery core are stably in contact to avoid deviation during welding. When welding, for batteries with thinner diameters, the push block pushes the clamping block to move closer to the battery to clamp and fix the battery with thinner diameter, so as to avoid the spring II from being unable to clamp the battery with thinner diameter due to insufficient length of natural pop-up.

[0019] 2. Through the setting of the rotating wheel I, when the clamping block vertically descends along the inclined surface of the moving block, the rotating wheel I contacts the inclined surface of the moving block, which can reduce friction and avoid wear.

[0020] 3. The setting of the ball bearing can increase the smoothness of the movement of the slider I in the slide groove II to avoid jamming. In addition, the placement of the battery cells and batteries can be completed on one welding plate without the need for two welding plates to cover each other, thereby reducing the operation process and improving the accuracy of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of some structures in ;

[0023] Figure 3 For the present invention Figure 2 Structural diagram of the middle welding plate;

[0024] Figure 4 For the present invention Figure 2 Structural diagram of the middle welding joint;

[0025] Figure 5 For the present invention Figure 4 The structural diagram of the rotating ring in the middle;

[0026] Figure 6 For the present invention Figure 5 Isometric view in ;

[0027] Figure 7 For the present invention Figure 6 A magnified view of the structure of A1 in the middle;

[0028] Figure 8 For the present invention Figure 6 A2 is an enlarged view of the structure;

[0029] Fig. 9 For the present invention Figure 3 Structural diagram of the middle slider I;

[0030] Fig.10 For the present invention Fig. 9 Schematic diagram of the internal structure of the middle slider I.

[0031] In the figure: 1, welding frame; 101, threaded rod; 102, welding head; 2, workbench; 3, welding plate; 301, support frame; 302, slider Ⅰ; 3021, clamping block; 30211, ball bearing; 3022, fixed block Ⅰ; 3023, fixed rod; 3024, gear; 3025, limit block; 3026, fixed block Ⅱ; 303, welding port; 304, rotating ring; 3041, oblique Slot; 3042, lifting plate; 3043, lifting block; 3044, clamping block; 3045, rotating wheel I; 3046, connecting rod I; 3047, moving block; 3049, spring I; 3050, connecting rod II; 3051, fixed block III; 3052, spring II; 3053, slider II; 3054, connecting rod III; 3055, rotating wheel II; 3056, pushing block; 306, slot. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-8 As shown, a lithium battery cell packaging welding device comprises a workbench, welding frames are fixed on both sides of the top of the workbench, a welding head for welding is movably provided on the top of the welding frame, the bottom of the welding frame is rotated by a threaded rod to move back and forth on both sides of the workbench, and a welding plate is slidably connected to the top of the workbench.

[0034] The surface of the welding plate is provided with a plurality of welding ports for placing battery core strips, and a fitting mechanism is provided on the top of the welding plate and around the welding ports, and the fitting mechanism comprises a lifting plate and a lifting block, and the lifting plate is slidably connected to the surface of the welding plate between the two welding ports through a connecting rod I, and the end of the connecting rod I is fixedly connected to the lifting plate, and the lifting block is slidably installed inside the welding plate, and a connecting rod II is fixed on the surface of the lifting block, and a clamping block is fixed at the bottom of the connecting rod II, and a rotating wheel I is rotatably connected to the lower surface of the clamping block, and a slide groove I is provided on the surface of the welding plate, and a moving block is movably arranged inside the slide groove I, and when the rotating wheel I descends and contacts the oblique side surface of the moving block, the top position of the slide groove I is partially closed.

[0035] A spring I is fixed to the top of the other end of the connecting rod I, and the top of the spring I is fixed in a partially closed position with the top of the slide groove I. The fitting mechanism also includes a clamping assembly.

[0036] The clamping assembly includes a rotating ring, the inner wall of which is fixed with a circumferentially distributed push block, the top of the welding plate of the push block is provided with a fixed block III and a slider II, the fixed block III is fixed to the top of the welding plate, the slider II is slidably connected to the top of the welding plate, and a spring II is fixed between the fixed block III and the slider II; a clamping block is fixed to the top of the slider II, a connecting block is fixed to the top of the clamping block, the rotating ring is rotatably connected to the top of the fixed block III, the push block contacts the connecting block as the rotating surface of the rotating ring pushes the clamping block and the slider II located at the top of the welding plate to move; the surface of the rotating ring has a notch, and an oblique groove is opened near the notch, the top of the connecting rod I is fixed with a connecting rod III, the outer wall of the connecting rod III is rotatably connected to a rotating wheel II, the connecting rod III rises and falls with the connecting rod I, and the rotating wheel II is located in the oblique groove and slides inside to push the rotating ring to rotate.

[0037] During operation, the battery strip is placed through the lifting plate, and then the battery is placed on the surfaces on both sides of the welding port, and the bottom of the battery is pressed on the top of the lifting block, so that the lifting block, connecting rod II and rotating wheel I are lowered, and the rotating wheel I descends along the inclined surface of the moving block to push the moving block to a position away from the clamping block to raise its connecting rod I and the lifting plate, so that the battery strip placed on the surface of the lifting plate is in seamless contact with the bottom of the battery, and through the setting of the connecting rod III, when the connecting rod I and the lifting plate rise, the connecting rod III rises at the same time, and the rotating wheel II is located inside the oblique groove and slides upward, and the rotating wheel II contacts the edge inclined surface of the oblique groove to push the rotating wheel The swivel rotates counterclockwise, and at the same time, the inclined surface of the oblique groove contacts the connecting block to push the clamping block forward in the direction of the battery to stably clamp the battery, so that the battery is stably in contact with the battery core strip to avoid deviation during welding. When welding a battery with a smaller diameter, the oblique groove pushes the clamping block to move toward the battery to clamp and fix the battery with a smaller diameter, avoiding the spring II from being unable to clamp the battery with a smaller diameter due to insufficient length when it naturally pops out. Moreover, through the setting of the rotating wheel I, when the clamping block vertically descends along the inclined surface of the moving block, the rotating wheel I contacts the inclined surface of the moving block to reduce friction and avoid wear.

[0038] Embodiment 2, based on embodiment 1,

[0039] See also Figures 1 to 10 As shown, as a specific embodiment of the present invention, a slide groove II is provided at both ends of the welding plate, a clamping groove is provided in the middle position of the slide groove II, the clamping groove and the slide groove II are in a cross shape, a slider I is slidably connected inside the slide groove II, a support frame is rotatably connected to the surface of the slider I, and clamping blocks are elastically connected to the upper and lower ends of the slider I; a ball bearing is rotatably connected inside the clamping block, and two clamping blocks are connected between them, a fixed block I is fixed to the front surface of the clamping block, a fixed block II is fixed to the lower surface of the fixed block I, and two fixed rods are fixed on both sides of the slider I.

[0040] The surface of the fixed rod is slidably connected to a limiting block, and the limiting block is a right-angled trapezoidal structure. The inner wall of the slider I is rotatably connected with a gear, and the middle position of the gear passes through the outside of the slider I and is connected to the end of the support frame, and the gear is meshed with the limiting block; the slider I is located in the slide groove II and slides to the slot position, and the block is ejected by the gear and engaged with the slot.

[0041] When placing the battery strips and batteries, it is necessary to flip the welding plate so that the groove faces upward, and then place the battery strips and batteries. When flipping the welding plate, first move the slider I and the support frame to the position of the card slot at the same time, and then rotate the support frame to make it stand vertically with the table top of the workbench. When the support frame rotates, it also drives the gear inside the slider I to rotate, and the gear engages with the limit block, pushing the limit block to move away from the fixed block II, so that the fixed block II is located at the highest point of the inclined surface of the limit block, and the two limit blocks move in opposite directions, and then the card block moves outward through the generated deformation expansion and is inserted into the card slot to engage with the slider Ⅰ and the distance moved by the support frame are fixed, and then the slider Ⅰ on the other side is moved to the edge to flip its support frame upward to be flush with the welding plate, and then the welding plate is flipped and the slider Ⅰ is also flipped, so that the surface of the battery strips placed on the welding plate faces up, and the battery strips and batteries are placed. Then, the welding plate is flipped in the opposite direction so that its bottom faces up to facilitate welding of the welding head through the welding port. The setting of the ball can increase the smoothness of the slider Ⅰ when moving in the slide groove Ⅱ to avoid jamming, and the placement of the battery strips and batteries can be completed on one welding plate without the need to cover two welding plates, so as to reduce the operation process and improve the accuracy of welding.

[0042] It should be noted that: a sliding pin is provided at the end of the support frame, and a socket is provided at the position where the gear passes through the support frame. When the welding plate needs to be flipped, the pin can be pulled out of the socket and then flipped. When the support frame needs to be rotated and stood still, the pin is slid into the socket and then flipped and stood still.

[0043] It should be noted that, in this article, relational terms such as first and, second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present invention, the fill pattern is only for distinguishing layers, without any other limitation.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cell packaging welding device, comprising: A workbench (2), with welding frames (1) fixed on both sides of the top of the workbench (2), a welding head (102) for welding being movably provided on the top of the welding frame (1), the bottom of the welding frame (1) being rotated by a threaded rod (101) to move back and forth on both sides of the workbench (2), and a welding plate (3) being slidably connected to the top of the workbench (2); The invention is characterized in that: the surface of the welding plate (3) is provided with a plurality of welding ports (303) for placing the battery core strips, and a fitting mechanism is provided at the top of the welding plate (3) and around the welding ports (303), and the fitting mechanism comprises a lifting plate (3042) and a lifting block (3043), and the lifting plate (3042) is slidably connected to the surface of the welding plate (3) between the two welding ports (303) through a connecting rod I (3046), and the end of the connecting rod I (3046) is fixedly connected to the lifting plate (3042), and the lifting block (304 3) Slidingly mounted inside the welding plate (3), the lifting block (3043) is fixed with a connecting rod II (3050) on the surface, the connecting rod II (3050) is fixed with a clamping block (3044) at the bottom, the clamping block (3044) is rotatably connected with a rotating wheel I (3045) on the lower surface, a sliding groove I is provided on the surface of the welding plate (3), a moving block (3047) is movably arranged inside the sliding groove I, and when the rotating wheel I (3045) is lowered and contacts the oblique side surface of the moving block (3047), the top position of the sliding groove I is partially closed; A spring I (3049) is fixed to the top of the other end of the connecting rod I (3046), and the top of the spring I (3049) is fixed in a partially closed position with the top of the slide groove I. The fitting mechanism also includes a clamping assembly.

2. A lithium battery cell packaging welding device according to claim 1, characterized in that: The clamping assembly comprises a rotating ring (304), the inner wall of which is fixed with circumferentially distributed push blocks (3056), the push blocks (3056) being provided with a fixed block III (3051) and a sliding block II (3053) at the top of the welding plate (3), the fixed block III (3051) being fixed to the top of the welding plate (3), the sliding block II (3053) being slidably connected to the top of the welding plate (3), and a spring II (3052) being fixed between the fixed block III (3051) and the sliding block II (3053).

3. A lithium battery cell packaging welding device according to claim 2, characterized in that: A clamping block (3044) is fixed on the top of the slider II (3053), a connecting block is fixed on the top of the clamping block (3044), the rotating ring (304) is rotatably connected to the top of the fixed block III (3051), and the pushing block (3056) contacts the connecting block with the rotating surface of the rotating ring (304) to push the clamping block (3044) and the slider II (3053) to move at the top of the welding plate (3).

4. A lithium battery cell packaging welding device according to claim 3, characterized in that: The surface of the rotating ring (304) is provided with a notch, and an oblique groove (3041) is provided near the notch. A connecting rod III (3054) is fixed to the top of the connecting rod I (3046), and a rotating wheel II (3055) is rotatably connected to the outer wall of the connecting rod III (3054). The connecting rod III (3054) rises and falls with the connecting rod I (3046), and the rotating wheel II (3055) is located inside the oblique groove (3041) and slides to push the rotating ring (304) to rotate.

5. A lithium battery cell packaging welding device according to claim 4, characterized in that: A slide groove II is provided at both ends of the welding plate (3), a clamping groove (306) is provided in the middle of the slide groove II, the clamping groove (306) and the slide groove II are in a cross shape, a slider I (302) is slidably connected inside the slide groove II, a support frame (301) is rotatably connected to the surface of the slider I (302), and clamping blocks (3021) are elastically connected to the upper and lower ends of the slider I (302).

6. A lithium battery cell packaging welding device according to claim 5, characterized in that: A ball bearing (30211) is rotatably connected inside the clamping block (3021), a gear (3024) is connected between the two clamping blocks (3021), a fixing block I (3022) is fixed on the front surface of the clamping block (3021), a fixing block II (3026) is fixed on the lower surface of the fixing block I (3022), and two fixing rods (3023) are fixed on both sides of the slider I (302).

7. A lithium battery cell packaging welding device according to claim 6, characterized in that: The surface of the fixed rod (3023) is slidably connected to a limit block (3025), and the limit block (3025) is a right-angled trapezoidal structure. The inner wall of the slider I (302) is rotatably connected to a gear (3024), and the middle position of the gear (3024) passes through the outside of the slider I (302) and is connected to the end of the support frame (301), and the gear (3024) is meshed with the limit block (3025).

8. A lithium battery cell packaging welding device according to claim 7, characterized in that: The slider I (302) is located in the slide groove II and slides to the position of the clamping groove (306), and the clamping block (3021) pops out through the gear (3024) to engage with the clamping groove (306).

Images