Battery cell welding and fixing device

Abstract

The utility model discloses a battery cell welding and fixing device which comprises a bottom plate, a positioning frame used for containing a battery cell is arranged on the bottom plate, first supporting frames are arranged on the two sides of the positioning frame, second supporting frames are arranged at the two ends of the back of the positioning frame, and a first platform and a second platform are installed at the top ends of the first supporting frames and the top ends of the second supporting frames respectively. A first clamping groove for placing a wide tab is formed in the top of the first platform. The battery cell is mounted through the adjustable positioning frame, the narrow tab and the wide tab are positioned and mounted on the outer side of the battery cell, and after the centers of the tabs coincide with the center of the battery cell pole column, welding work is performed, so that accurate positioning and pre-mounting of the battery cell, the narrow tab and the wide tab are realized, and high-precision welding processing is realized after fixation; according to the device, the positions of the first platform, the second platform and the L-shaped baffle can be adjusted, the positions of the first positioning pin and the second positioning pin are finely adjusted, and the device can be suitable for welding machining of battery cells with different thicknesses and sizes and positioning of tabs with different shapes.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a battery cell welding and fixing device. Background Technology

[0002] In the development and application of battery cells, batteries have become an indispensable part of daily life, powering an increasing number of portable devices, such as electronic devices, wireless power tools, energy storage, hybrid and electric vehicles. Internal welding processes within battery cells include: tab welding, tab-terminal welding, terminal-top cover welding, top cover perimeter welding, and sealing stud welding.

[0003] This application applies to the welding fixture for external tabs and terminals. Laser welding technology is employed in the welding process; laser welding is a highly efficient and precise welding method that utilizes a high-energy-density laser beam as a heat source. In existing technologies, a single-piece fixed mold is typically used to butt-fit and weld the tabs and battery terminals. This method suffers from poor equipment applicability, resulting in high processing costs and low welding efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a battery cell welding and fixing device to address the shortcomings of the prior art, so as to facilitate and accurately fix the electrode tab, ensure that the center of the electrode tab coincides with the center of the electrode post, and at the same time provide a certain support for the electrode tab.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A battery cell welding and fixing device includes a base plate with a positioning frame for placing the battery cell. First support frames are provided on both sides of the positioning frame, and second support frames are provided at both ends of the back of the positioning frame. A first platform and a second platform are respectively mounted on the top of the first and second support frames. The top of the first platform has a first slot for placing a wide tab, and the top of the second platform has a second slot for placing a narrow tab, with the first and second slots perpendicularly distributed. A first positioning pin and a second positioning pin are detachably installed in the first and second slots, respectively. The first positioning pin is movably connected to the first platform via an adjustment mechanism, and the second positioning pin is detachably installed on the second platform. The battery cell to be welded is placed in the positioning frame formed by a set of L-shaped baffles. The inner diameter of the positioning frame formed by the L-shaped baffles is adjustable, improving the applicability of the device. Wide and narrow tabs are positioned and installed in the first and second slots, and welding is performed. The positions of the first and second positioning pins corresponding to the tab holes are adjustable, ensuring that the center of the tab coincides with the center of the battery cell electrode post after installation, improving welding accuracy and processing efficiency. Compared with existing technologies, it reduces the labor intensity of welding operations.

[0007] Preferably, the first support frame and the second support frame are both vertically fixed to the top of the base plate, the first platform is detachably connected to the first support frame by bolts, and the second platform is detachably connected to the second support frame by bolts.

[0008] Preferably, a gasket is provided between the first platform and the first support frame, and a gasket is also provided between the second platform and the second support frame, and the gasket is made of rubber material.

[0009] Preferably, the positioning frame is formed by two L-shaped baffles, and the two L-shaped baffles are centrally symmetrically distributed. The L-shaped baffles are detachably connected to the base plate by bolts.

[0010] Preferably, the first platform, the second platform, and the L-shaped baffle are each provided with at least two strip grooves, the outer edge of the strip grooves is set to be flared, and multiple bolts correspond one-to-one with multiple strip grooves and slide in fit.

[0011] Preferably, the bottom inner side of the second support frame is provided with a notch, and one of the L-shaped baffles extends into the notch.

[0012] Preferably, the adjustment mechanism includes a lead screw and an adjustment block. A slot is provided on the upper surface of the first platform. The bottom surface of the adjustment block is attached to and movably connected to the slot. The lead screw passes through the slot and is rotatably connected to the side wall of the first platform. The lead screw also passes through the adjustment block and is threadedly engaged with the through hole. The first positioning pin is detachably installed on the top of the adjustment block.

[0013] Preferably, the upper surface of the adjusting block is provided with a T-shaped groove, and a sliding piece is integrally provided at the bottom end of the first positioning pin. The sliding piece slides in conjunction with the T-shaped groove, and a clamping screw is threaded onto the sliding piece.

[0014] Preferably, the lead screw extends from a first platform, and a torsion disc is coaxially mounted on the outer end of the lead screw on the first platform.

[0015] Preferably, the first support frame and the second support frame are configured as telescopic mechanisms.

[0016] Preferably, the upper surface of the second platform has at least two evenly distributed positioning holes, the second positioning pin is embedded in the positioning holes, and is combined with the second platform by positioning screws.

[0017] This utility model has the following beneficial effects:

[0018] The battery cell is installed using an adjustable positioning frame, and narrow and wide tabs are positioned and installed on its outer side. After the center of the tabs coincides with the center of the battery cell's electrode post, welding is performed. This allows for precise positioning and pre-installation of the battery cell and the narrow and wide tabs. After fixing, high-precision welding is achieved. This device can adjust the positions of the first platform, the second platform, and the L-shaped baffle. Furthermore, by fine-tuning the positions of the first and second positioning pins, it is suitable for welding battery cells of different thicknesses and for positioning tabs of different shapes.

[0019] By partially replacing the first platform, the second platform, and the L-shaped baffle, welding of cells and tabs of different specifications can be achieved, which facilitates later maintenance, reduces equipment processing and maintenance costs, and reduces the labor intensity of welding operations compared with existing technologies. Attached Figure Description

[0020] Figure 1 This is a first-view perspective perspective view of the overall structure of the battery cell welding and fixing device provided by this utility model.

[0021] Figure 2 This is a second-view perspective perspective view of the overall structure of the battery cell welding and fixing device provided by this utility model.

[0022] Figure 3 This is a top view of the battery cell welding and fixing device provided by this utility model.

[0023] Figure 4 This is an exploded view of the battery cell welding and fixing device provided by this utility model.

[0024] Figure 5 This is an exploded structural diagram of the adjustment mechanism in this utility model.

[0025] Among them are:

[0026] Base plate-1; Positioning frame-2; First support frame-3; Second support frame-4; First platform-5; Second platform-6; First slot-7; Second slot-8; First positioning pin-9; Second positioning pin-10; Shim-11; L-shaped baffle-12; Bolt-13; Strip groove-14; Lead screw-15; Adjusting block-16; Groove-17; T-groove-18; Sliding piece-19; Clamping screw-20; Twist disc-21; Positioning hole-22; Positioning screw-23. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0028] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," 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 utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0029] like Figure 1-5 As shown, a battery cell welding and fixing device includes a base plate 1, a positioning frame 2 for placing the battery cell on the base plate 1, first support frames 3 on both sides of the positioning frame 2, and second support frames 4 at both ends of the back of the positioning frame 2. A first platform 5 and a second platform 6 are respectively installed on the top of the first support frames 3 and the second support frames 4. The top of the first platform 5 has a first slot 7 for placing a wide tab, and the top of the second platform 6 has a second slot 8 for placing a narrow tab. The first slot 7 and the second slot 8 are perpendicularly distributed. The wide tab and the narrow tab are respectively embedded in the first slot 7 and the second slot 8, and are welded after mating with the battery cell in the positioning frame 2. A first positioning pin 9 and a second positioning pin 10 are detachably installed in the first slot 7 and the second slot 8, and the first positioning pin 9 and the second positioning pin 10 are respectively used to position the wide tab and the narrow tab. The first positioning pin 9 is movably connected to the first platform 5 through an adjustment mechanism, and the second positioning pin 10 is detachably installed on the second platform 6.

[0030] Specifically, in the above technical solution, the first support frame 3 and the second support frame 4 are both vertically fixed to the top of the base plate 1. The first platform 5 is detachably connected to the first support frame 3 by bolts 13, and the second platform 6 is detachably connected to the second support frame 4 by bolts 13, which facilitates the replacement of different first platforms 5 and second platforms 6 and is suitable for positioning and installing tabs of different sizes.

[0031] Specifically, in the above technical solution, a gasket 11 is provided between the first platform 5 and the first support frame 3, and a gasket 11 is also provided between the second platform 6 and the second support frame 4. The gasket 11 is made of rubber material, which provides a certain elastic protection and facilitates later maintenance.

[0032] Specifically, in the above technical solution, the positioning frame 2 is surrounded by two L-shaped baffles 12, and the two L-shaped baffles 12 are centrally symmetrically distributed. The L-shaped baffles 12 are detachably connected to the base plate 1 by bolts 13, so as to be suitable for the installation and use of battery cells of different sizes.

[0033] Specifically, in the above technical solution, at least two strip grooves 14 are provided on the first platform 5, the second platform 6 and the L-shaped baffle 12. The outer edge of the strip groove 14 is set to be flared, and multiple bolts 13 correspond to and slide with the multiple strip grooves 14 respectively. The thickness of the flared area matches the thickness of the top thread of the bolt 13. When the bolt 13 is pressed, the first platform 5, the second platform 6 and the L-shaped baffle 12 can be fixed. After being loosened to a certain extent, their positions can be adjusted.

[0034] Specifically, in the above technical solution, a notch is provided at the bottom inner side of the second support frame 4, and one of the L-shaped baffles 12 extends into the notch to facilitate the installation of the L-shaped baffle 12.

[0035] Specifically, in the above technical solution, the adjustment mechanism includes a lead screw 15 and an adjustment block 16. A slot 17 is provided on the upper surface of the first platform 5. The bottom surface of the adjustment block 16 is attached to and movably connected in the slot 17. The lead screw 15 passes through the slot 17 and is rotatably connected to the side wall of the first platform 5. The lead screw 15 also passes through the adjustment block 16 and is threadedly engaged with the through hole. The first positioning pin 9 is detachably installed on the top of the adjustment block 16. Rotating the lead screw 15 causes the adjustment block 16 to move in the slot 17, thereby adjusting the position of the first positioning pin 9 and realizing the positioning and installation of different tab structures.

[0036] Specifically, in the above technical solution, a T-shaped groove 18 is provided on the upper surface of the adjusting block 16, and a sliding piece 19 is integrally provided at the bottom end of the first positioning pin 9. The sliding piece 19 slides in cooperation with the T-shaped groove 18, and a clamping screw 20 is threaded on the sliding piece 19. The clamping screw 20 can clamp the sliding piece 19, thereby limiting the position of the first positioning pin 9.

[0037] Specifically, in the above technical solution, the end of the lead screw 15 extends into a first platform 5, and a torsion disc 21 is coaxially mounted on the outer end of the lead screw 15 on the first platform 5, so as to facilitate driving the lead screw 15 through the torsion disc 21.

[0038] Specifically, in the above technical solution, the first support frame 3 and the second support frame 4 are configured as telescopic mechanisms, including but not limited to electric push rods, hydraulic cylinders, telescopic sleeves and other structures; they can adapt to the welding of battery cells at different heights.

[0039] Specifically, in the above technical solution, at least two evenly distributed positioning holes 22 are provided on the upper surface of the second platform 6. The second positioning pin 10 is embedded in the positioning hole 22 and combined with the second platform 6 by the positioning screw 23. The positioning screw 23 has a central hole through its axis, and the positioning hole 22 and the positioning screw 23 are coaxially distributed.

[0040] The working principle of this device is as follows: The battery cell to be welded is placed within the positioning frame 2 formed by a set of L-shaped baffles 12. After the battery cell position is fixed, for narrow tab welding, the entire tab is placed in the second slot 8, and the corresponding tab hole is fitted onto the second positioning pin 10, so that the long side of the tab is perpendicular to the large surface of the battery cell, and the center of the tab coincides with the center of the battery cell terminal post, then welding can be performed; for wide tab welding, the entire tab is placed on the first slot 7, and the corresponding tab hole is fitted onto the first positioning pin 9, so that the entire long side of the tab is parallel to the large surface of the battery cell, and the center of the tab coincides with the center of the battery cell terminal post, then welding can be performed. Welding battery cells of different thicknesses can be achieved by adjusting the position of the L-shaped baffles 12 to suit the thickness of the battery cell to be processed.

[0041] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A battery cell welding and fixing device, comprising a base plate (1), characterized in that: The base plate (1) is provided with a positioning frame (2) for placing the battery cell. The positioning frame (2) is provided with a first support frame (3) on both sides and a second support frame (4) at both ends of the back of the positioning frame (2). The top of the first support frame (3) and the second support frame (4) are respectively equipped with a first platform (5) and a second platform (6). The top of the first platform (5) is provided with a first slot (7) for placing wide tabs and the top of the second platform (6) is provided with a second slot (8) for placing narrow tabs. The first positioning pin (9) and the second positioning pin (10) are respectively detachably installed in the first slot (7) and the second slot (8). An adjustment mechanism is provided between the first positioning pin (9) and the first platform (5).

2. The battery cell welding and fixing device according to claim 1, characterized in that: The first support frame (3) and the second support frame (4) are both vertically fixed to the top of the base plate (1). The first platform (5) is detachably connected to the first support frame (3) by bolts (13), and the second platform (6) is detachably connected to the second support frame (4) by bolts (13).

3. The battery cell welding and fixing device according to claim 2, characterized in that: A gasket (11) is provided between the first platform (5) and the first support frame (3), and a gasket (11) is also provided between the second platform (6) and the second support frame (4), and the gasket (11) is made of rubber material.

4. The battery cell welding and fixing device according to claim 3, characterized in that: The positioning frame (2) is formed by two L-shaped baffles (12), and the two L-shaped baffles (12) are centrally symmetrically distributed. The L-shaped baffles (12) are detachably connected to the base plate (1) by bolts (13).

5. The battery cell welding and fixing device according to claim 4, characterized in that: At least two strip grooves (14) are provided on the first platform (5), the second platform (6) and the L-shaped baffle (12). The outer edge of the strip groove (14) is set to be flared, and multiple bolts (13) correspond to and slide with the multiple strip grooves (14) respectively.

6. The battery cell welding and fixing device according to claim 4, characterized in that: The second support frame (4) has a notch at the bottom of its inner side, and one of the L-shaped baffles (12) extends into the notch.

7. The battery cell welding and fixing device according to claim 1, characterized in that: The adjustment mechanism includes a lead screw (15) and an adjustment block (16). A slot (17) is provided on the upper surface of the first platform (5). The bottom surface of the adjustment block (16) is attached to and movably connected in the slot (17). The lead screw (15) passes through the slot (17) and is rotatably connected to the side wall of the first platform (5). The lead screw (15) passes through the adjustment block (16) and is threadedly engaged with the through hole. The first positioning pin (9) is detachably installed on the top of the adjustment block (16).

8. The battery cell welding and fixing device according to claim 7, characterized in that: The upper surface of the adjusting block (16) is provided with a T-shaped groove (18), and the bottom end of the first positioning pin (9) is integrally provided with a sliding piece (19). The sliding piece (19) slides in conjunction with the T-shaped groove (18), and a clamping screw (20) is threaded on the sliding piece (19). The lead screw (15) extends out of the first platform (5), and a torsion plate (21) is coaxially mounted on the outer end of the lead screw (15) of the first platform (5).

9. The battery cell welding and fixing device according to claim 2, characterized in that: The first support frame (3) and the second support frame (4) are configured as telescopic mechanisms, and the first slot (7) and the second slot (8) are distributed perpendicularly.

10. The battery cell welding and fixing device according to claim 1, characterized in that: The second positioning pin (10) is detachably installed on the second platform (6). At least two evenly distributed positioning holes (22) are provided on the upper surface of the second platform (6). The second positioning pin (10) is embedded in the positioning hole (22) and combined with the second platform (6) by positioning screw (23).

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