Sealing nail welding device

Abstract

The utility model discloses a sealing nail welding device which comprises a stand column assembly used for vertically positioning a battery to be assembled, the top of the stand column assembly is provided with a horizontally-arranged top plate, an assembling hole right opposite to the battery to be assembled is formed in the top plate in a penetrating mode, and the diameter of the assembling hole is larger than that of a sealing nail to be welded. A pressing head which can be coaxially and directly opposite to a sealing nail to be welded is arranged above the assembling hole, at least two welding holes which are uniformly distributed in the circumferential direction are formed in the pressing head in the axial direction in a penetrating mode, and the diameter of the excircle of each welding hole is smaller than the diameter of the sealing nail to be welded; a vertically-arranged first linear telescopic mechanism is arranged on the side of the top plate, and the upper end of the pressing head is connected to the telescopic end of the first linear telescopic mechanism through a transversely-arranged supporting rod, so that the lower end of the pressing head can tightly press or loosen a sealing nail to be welded in an up-down moving mode. The sealing nail has the advantages of being reasonable in structural design, capable of rapidly fixing the sealing nail, convenient to weld and position and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a sealing nail welding device. Background Art

[0002] At present, with the rapid development of the new energy industry, society's requirements for the energy density, safety performance, and fast charging performance of lithium-ion batteries have been further improved. As a highly recognized solution, large cylindrical batteries have ushered in a broad market space. After the cylindrical battery is filled with liquid, it is necessary to weld a sealing pin at the filling port to ensure the sealing of the battery. Since the sealing pin is relatively small, when welding, it is necessary to first weld multiple welding points around the sealing pin for preliminary fixation, and then perform circumferential welding. During the spot welding process, the edge of the sealing pin will warp up due to welding stress, affecting the subsequent circumferential welding quality and sealing performance. Therefore, there is an urgent need for a device that can quickly fix the sealing pin. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a sealing nail welding device which has a reasonable structural design, can quickly fix the sealing nail, and is convenient for welding and positioning.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A sealing nail welding device, characterized in that it includes a column assembly for vertically positioning a battery to be assembled, the top of the column assembly has a horizontally arranged top plate, the top plate is provided with an assembly hole arranged opposite to the battery to be assembled, the diameter of the assembly hole is larger than the diameter of the sealing nail to be welded; above the assembly hole is provided with a pressure head which can be coaxially arranged opposite to the sealing nail to be welded, the pressure head is provided with at least two welding holes evenly distributed along the circumferential direction axially through-arranged, the circumscribed circle diameter of the two welding holes is smaller than the diameter of the sealing nail to be welded; the side of the top plate is provided with a first linear telescopic mechanism arranged vertically, the upper end of the pressure head is connected to the telescopic end of the first linear telescopic mechanism by a laterally arranged support rod, so that the lower end of the pressure head can move up and down to tighten or loosen the sealing nail to be welded.

[0006] With the above structure, the battery to be assembled is vertically positioned on the column assembly, and the sealing nail to be welded is placed on the injection hole of the battery. The pressure head is driven downward by the first linear telescopic mechanism to allow the lower end of the pressure head to press the sealing nail tightly to prevent the sealing nail from tilting or shifting. The welding gun is inserted into the sealing nail through the welding hole on the pressure head to perform spot welding to preliminarily fix the sealing nail. After the pressure head is removed, the sealing nail that has been preliminarily fixed can be circumferentially welded by the welding gun. Since it is preliminarily fixed by electric welding, the sealing nail will not tilt or move during the entire circumferential welding process, thereby improving the welding quality.

[0007] Furthermore, the lower end of the pressure head has a pressure ring protruding along the edge, the diameter of the pressure ring is smaller than the diameter of the sealing nail to be welded, and the welding holes are all located in the pressure ring.

[0008] In this way, the sealing pin is compressed by the pressure ring at the lower end edge of the pressure head, and the middle part of the pressure ring is relatively recessed to form a welding space, so that the welding gun inserted into the welding hole can better complete the welding operation.

[0009] Furthermore, a second linear telescopic mechanism is horizontally arranged on the side of the top plate, and the first linear telescopic mechanism is installed at the telescopic end of the second linear telescopic mechanism.

[0010] In this way, the first linear telescopic mechanism can be driven by the second linear telescopic mechanism to move horizontally, so that the pressure head is moved away from above the assembly hole, which is convenient for assembly operation.

[0011] Furthermore, the first linear telescopic mechanism and the second linear telescopic mechanism are both cylinders.

[0012] Furthermore, the support rod has a mounting hole that is vertically through-going, the diameter of the mounting hole is consistent with the outer diameter of the pressure head, and the pressure head is detachably connected to the mounting hole.

[0013] Furthermore, the upper end of the pressure head has a flange protruding radially outward, the flange has a bolt hole set through it, the support rod has a threaded hole set corresponding to the bolt hole, and the pressure head is connected to the threaded hole of the support rod by a screw passing through the bolt hole.

[0014] Furthermore, the column assembly includes a column and a bracket, the bracket is movably mounted on the column through a vertically arranged third linear telescopic mechanism, and is arranged vertically opposite to the top plate; a rotatable tray is vertically arranged upward on the bracket, and the top of the tray has a coaxially arranged positioning groove, and the diameter of the positioning groove matches the outer diameter of the battery to be assembled; the tray is connected to a rotation drive mechanism for driving it to rotate.

[0015] In this way, the batteries to be assembled are placed on the tray, and during the subsequent circumferential welding, the batteries can be driven to rotate by the rotary drive mechanism for welding.

[0016] Furthermore, the column also has a support plate that can move up and down through a vertically arranged slide rail, the support plate is connected to the telescopic end of the third linear telescopic mechanism, and the bracket is arranged at the lower end of the support plate; the upper end of the support plate also has a transversely arranged guide mechanism, and two slidable positioning blocks are symmetrically arranged on the guide mechanism, and the opposite sides of the two positioning blocks have arc-shaped positioning surfaces; the positioning block has two groups of rolling members protruding relative to the positioning surface, and the center distance between the two groups of rolling members is smaller than the diameter of the battery to be assembled; the support plate is provided with a linear drive mechanism for driving the two positioning blocks to move synchronously toward or away from each other.

[0017] In this way, after the battery to be assembled is placed on the positioning groove of the tray, the two positioning blocks are synchronously moved toward each other through the linear drive mechanism. Since the rolling elements protrude relative to the positioning surface, the four rolling elements on the two positioning blocks contact the outer cylindrical surface of the cylindrical battery and position the cylindrical battery; when the cylindrical battery rotates along with the tray and the pressure head, the rolling elements rotate synchronously to ensure that the cylindrical battery is always in an upright state.

[0018] Furthermore, the linear drive mechanism includes two screw rods with opposite rotation directions and coaxially connected, and the screw rods are arranged parallel to the guide mechanism; the two positioning blocks are respectively connected to the screw nuts of the two screw rods; one end of the screw rod is connected to the first drive motor.

[0019] Furthermore, the rolling element is a bearing rotatably mounted on the positioning block via a vertically arranged rotating shaft; and the guiding mechanism is two guide rails arranged side by side on the supporting plate.

[0020] In summary, the utility model has the advantages of reasonable structural design, ability to quickly fix sealing nails, and convenience for welding positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0022] Figure 2 for Figure 1 Schematic diagram of the enlarged structure in the middle circle.

[0023] Figure 3 It is a schematic diagram of the structure of the pressure head. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the embodiments.

[0025] When implementing: Figure 1 to Figure 3 As shown, a sealing nail welding device comprises a column assembly 1 for vertically positioning a battery to be assembled, the top of the column assembly 1 is provided with a horizontally arranged top plate 2, the top plate 2 is provided with an assembly hole 21 arranged opposite to the battery to be assembled, the diameter of the assembly hole 21 is larger than the diameter of the sealing nail to be welded; above the assembly hole 21 is provided with a pressing head 3 which can be coaxially arranged opposite to the sealing nail to be welded, the pressing head 3 is provided with four welding holes 31 uniformly distributed along the circumferential direction axially through-arranged, the circumscribed circle diameters of the two welding holes 31 are smaller than the diameter of the sealing nail to be welded; the side of the top plate 2 is provided with a first linear telescopic mechanism 4 arranged vertically, the upper end of the pressing head 3 is connected to the telescopic end of the first linear telescopic mechanism 4 by a laterally arranged support rod 5, so that the lower end of the pressing head 3 can move up and down to press or loosen the sealing nail to be welded.

[0026] like Figure 1 As shown, the column assembly 1 includes a column 11 and a bracket 12. The bracket 12 is movably mounted on the column 11 through a third linear telescopic mechanism 13 arranged vertically, and is arranged vertically opposite to the top plate 2. A rotatable tray 14 is arranged vertically upward on the bracket 12. The top of the tray 14 has a coaxially arranged positioning groove, and the diameter of the positioning groove matches the outer diameter of the battery to be assembled. The tray 14 is connected to a rotation drive mechanism 15 for driving the rotation thereof. In this embodiment, the rotation drive mechanism 15 includes a second drive motor, and the output end of the second drive motor is connected to a reducer, and the output end of the reducer is coaxially connected to the tray 14.

[0027] The column 11 also has a support plate 16 that can move up and down through a vertically arranged slide rail. The support plate 16 is connected to the telescopic end of the third linear telescopic mechanism 13, and the bracket 12 is arranged at the lower end of the support plate 16; the upper end of the support plate 16 also has a transversely arranged guide mechanism, and two slidable positioning blocks 17 are symmetrically arranged on the guide mechanism, and the opposite sides of the two positioning blocks 17 have an arc-shaped positioning surface; the positioning block 17 has two groups of rolling members 18 protruding relative to the positioning surface, and the center distance of the two groups of rolling members 18 is less than the diameter of the battery to be assembled; the support plate 16 is provided with a linear drive mechanism for driving the two positioning blocks 17 to move synchronously toward or away from each other. In this embodiment, the linear drive mechanism includes two screw rods with opposite rotation directions and coaxially connected, and the screw rods are arranged in parallel with the guide mechanism; the two positioning blocks 17 are respectively connected to the screw nuts of the two screw rods; one end of the screw rod is connected to the first drive motor. The rolling element 18 is a bearing rotatably mounted on the positioning block 17 via a vertically arranged rotating shaft; the guiding mechanism is two guide rails arranged side by side on the supporting plate 16 .

[0028] With the above structure, after the battery to be assembled is placed on the positioning groove of the tray, the two positioning blocks are synchronously moved toward each other through the linear drive mechanism. Since the rolling elements protrude relative to the positioning surface, the four rolling elements on the two positioning blocks contact the outer cylindrical surface of the cylindrical battery and position the cylindrical battery. Then, the third linear telescopic mechanism 13 is used to push the support plate to drive the positioned cylindrical battery to move upward as a whole, and the sealing nail to be welded is placed on the liquid injection hole of the battery. The pressure head is driven downward by the first linear telescopic mechanism to allow the lower end of the pressure head to press the sealing nail to prevent the sealing nail from tilting or shifting. The welding gun is inserted into the sealing nail through the welding hole on the pressure head to perform spot welding and preliminarily fix the sealing nail. After the pressure head is removed, the sealing nail that has been preliminarily fixed is circumferentially welded by the welding gun. During welding, the welding gun remains stationary, and the tray and the battery are driven to rotate by the rotating drive mechanism for welding.

[0029] like Figure 3 As shown, the lower end of the pressure head 3 has a pressure ring 32 protruding along the edge, the diameter of the pressure ring 32 is smaller than the diameter of the sealing pin to be welded, and the welding holes 31 are all located in the pressure ring 32. In this way, the sealing pin is pressed by the pressure ring at the edge of the lower end of the pressure head, and the middle part of the pressure ring is relatively concave to form a welding space, so that the welding gun inserted into the welding hole can better complete the welding operation.

[0030] In order to allow the pressure head to move away from the assembly hole 21 for easy operation, a second linear telescopic mechanism 6 is horizontally arranged on the side of the top plate 2, and the first linear telescopic mechanism 4 is installed at the telescopic end of the second linear telescopic mechanism 6. In this way, the first linear telescopic mechanism can be driven by the second linear telescopic mechanism to move horizontally, so that the pressure head can be moved away from the top of the assembly hole, which is convenient for assembly operation.

[0031] In this embodiment, the first linear telescopic mechanism 4, the second linear telescopic mechanism 6 and the third linear telescopic mechanism 13 are all cylinders.

[0032] The support rod 5 has a mounting hole that is vertically through-set, and the diameter of the mounting hole is consistent with the outer diameter of the pressure head 3. The pressure head 3 is detachably connected to the mounting hole. In specific implementation, the upper end of the pressure head 3 has a flange that protrudes radially outward, and the flange has a bolt hole (not shown in the figure) that is through-set, and the support rod 5 has a threaded hole that is set corresponding to the bolt hole, and the pressure head 3 is connected to the threaded hole of the support rod 5 by a screw that passes through the bolt hole.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing nail welding device, characterized in that: The invention comprises a column assembly (1) for vertically positioning a battery to be assembled, wherein the top of the column assembly (1) comprises a horizontally arranged top plate (2), the top plate (2) is provided with an assembly hole (21) arranged opposite to the battery to be assembled, the diameter of the assembly hole (21) being larger than the diameter of a sealing nail to be welded; above the assembly hole (21) there is a pressing head (3) which can be arranged coaxially opposite to the sealing nail to be welded, the pressing head (3) is provided with at least two welding holes (31) uniformly distributed along the circumferential direction and axially extending therethrough, the diameter of the circumscribed circles of the two welding holes (31) being smaller than the diameter of the sealing nail to be welded; and a first linear telescopic mechanism (4) arranged vertically is provided on the side of the top plate (2), the upper end of the pressing head (3) is connected to the telescopic end of the first linear telescopic mechanism (4) via a laterally arranged support rod (5), so that the lower end of the pressing head (3) can move up and down to press or loosen the sealing nail to be welded.

2. The sealing nail welding device according to claim 1, characterized in that: The lower end of the pressure head (3) has a pressure ring (32) protruding along the edge, the diameter of the pressure ring (32) is smaller than the diameter of the sealing nail to be welded, and the welding holes (31) are all located in the pressure ring (32).

3. The sealing nail welding device according to claim 1, characterized in that: A second linear telescopic mechanism (6) is horizontally arranged on the side of the top plate (2), and the first linear telescopic mechanism (4) is mounted on the telescopic end of the second linear telescopic mechanism (6).

4. The sealing nail welding device according to claim 3, characterized in that: The first linear telescopic mechanism (4) and the second linear telescopic mechanism (6) are both cylinders.

5. The sealing nail welding device according to claim 1, characterized in that: The support rod (5) has a mounting hole which is vertically penetrated, the diameter of the mounting hole is consistent with the outer diameter of the pressure head (3), and the pressure head (3) is detachably connected to the mounting hole.

6. The sealing nail welding device according to claim 5, characterized in that: The upper end of the pressure head (3) has a flange protruding radially outward, the flange has a bolt hole extending therethrough, the support rod (5) has a threaded hole corresponding to the bolt hole, and the pressure head (3) is connected to the threaded hole of the support rod (5) by means of a screw passing through the bolt hole.

7. The sealing nail welding device according to claim 1, characterized in that: The column assembly (1) comprises a column (11) and a bracket (12); the bracket (12) is movably mounted on the column (11) via a third linear telescopic mechanism (13) arranged vertically, and is arranged vertically opposite to the top plate (2); a rotatable tray (14) is arranged vertically upward on the bracket (12); the top of the tray (14) has a coaxially arranged positioning groove, and the diameter of the positioning groove matches the outer diameter of a battery to be assembled; and the tray (14) is connected to a rotation drive mechanism (15) for driving the tray (14) to rotate.

8. The sealing nail welding device according to claim 7, characterized in that: The column (11) is also provided with a support plate (16) which can be moved up and down by means of a vertically arranged slide rail, the support plate (16) is connected to the telescopic end of the third linear telescopic mechanism (13), and the bracket (12) is arranged at the lower end of the support plate (16); the upper end of the support plate (16) is also provided with a transversely arranged guide mechanism, two slidable positioning blocks (17) are symmetrically arranged on the guide mechanism, and the two positioning blocks (17) have arc-shaped positioning surfaces on opposite sides; the positioning blocks (17) have two groups of rolling elements (18) protrudingly arranged relative to the positioning surfaces, and the center distance between the two groups of rolling elements (18) is smaller than the diameter of the battery to be assembled; and the support plate (16) is provided with a linear drive mechanism for driving the two positioning blocks (17) to move synchronously towards or away from each other.

9. The sealing nail welding device according to claim 8, characterized in that: The linear drive mechanism comprises two screw rods with opposite rotation directions and coaxially connected, the screw rods being arranged in parallel with the guide mechanism; the two positioning blocks (17) are respectively connected to the screw rod nuts of the two screw rods; and one end of the screw rod is connected to a first drive motor.

10. The sealing nail welding device according to claim 8, characterized in that: The rolling element (18) is a bearing rotatably mounted on the positioning block (17) via a vertically arranged rotating shaft; and the guide mechanism is two guide rails arranged side by side on the support plate (16).

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