A sealing nail auxiliary welding device for a battery filling hole

Abstract

The utility model discloses a sealing nail auxiliary welding device for a battery filling hole, comprising a base plate and an operating hole through-through arranged on the base plate; the operating hole is provided with two radially slidably symmetrically arranged support plates, and an elastic member is provided between the support plates and the base plate to move the support plates toward the middle of the operating hole; the two support plates have a semicircular groove on one side opposite to the other, and the grooves on the two support plates are spliced ​​to form a positioning hole; the base plate has a pressure head that can be coaxially arranged opposite to the sealing nail to be welded, and the pressure head is provided with at least two circumferentially evenly distributed welding holes through-through axially, and the circumscribed circle diameters of the two welding holes are smaller than the diameter of the sealing nail to be welded; the two sides of the base plate have vertically arranged lifting mechanisms, and the lifting ends of the two lifting mechanisms are provided with horizontally arranged support rods, and the pressure head is installed on the support rods. The utility model has the advantages of convenient operation, convenient welding positioning, and conducive to ensuring the welding sealing and reliability of the sealing nail.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a sealing nail auxiliary welding device for a battery liquid injection hole. 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, the filling port needs to be sealed. The existing sealing nails are fixed in two ways: welding and riveting. In order to facilitate circumferential welding, it is necessary to first fix the sealing nails at the filling hole with the help of spot welding. However, the sealing nails are prone to warping during spot welding, which not only affects the sealing effect and poses a risk of leakage, but also easily causes bubbles and leakage in the welding pool due to the high-temperature evaporation of the electrolyte during subsequent circumferential welding. Riveted sealing nails are prone to cracks and pose a risk of leakage. At the same time, the production efficiency of the pull riveting form is low and cannot effectively increase the product production speed. 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 auxiliary welding device which is easy to operate, convenient for welding positioning, and beneficial to ensuring the welding sealing and reliability of the sealing nail.

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

[0005] A sealing nail auxiliary welding device for a battery injection hole, characterized in that it comprises a horizontally arranged substrate, on which an operation hole corresponding to the injection hole is provided; the operation hole is provided with two support plates symmetrically arranged in a radially slidable manner, and an elastic member is provided between the support plate and the substrate to enable the support plate to move toward the middle of the operation hole; the two support plates have a semicircular groove on one side opposite to the other, and the grooves on the two support plates are spliced ​​to form a positioning hole, and the positioning hole comprises a supporting hole section and a positioning hole section, and the inner diameter of the supporting hole section is consistent with the diameter of the sealing nail, so The positioning hole section is located below the supporting hole section and has a smaller diameter than the supporting hole section; a conical guide hole section is connected between the supporting hole section and the positioning hole section; a pressure head is provided above the substrate, which can be coaxially arranged opposite to the sealing pin to be welded, and at least two welding holes uniformly distributed along the circumferential direction are axially through-arranged on the pressure head, and the circumscribed circle diameter of the two welding holes is smaller than the diameter of the sealing pin to be welded; vertically arranged lifting mechanisms are provided on both sides of the substrate, and horizontally arranged support rods are mounted at the lifting ends of the two lifting mechanisms, and the pressure head is installed on the support rods.

[0006] With the above structure, since the inner diameter of the supporting hole section is consistent with the diameter of the sealing pin, the sealing pin can be placed in the supporting hole section before welding, and then the support rod is driven downward by two lifting mechanisms, and the sealing pin is squeezed downward by the pressure head. The sealing pin is guided by the conical guide hole section, and the two support plates are squeezed to both sides, and smoothly moved down to the battery's injection hole. After the pressure head completely presses the sealing pin, spot welding can be performed on the sealing pin through the welding hole on the pressure head, so that the sealing pin can be accurately positioned on the injection hole, which is convenient for subsequent circumferential welding for sealing. The above structure can easily place the sealing pin through the structure of the support plate and the positioning hole, so that it can be assembled and pressed by the pressure head, and the operation is more convenient.

[0007] Furthermore, the bottom of the base plate has a radially arranged slide groove, one end of the slide groove is connected to the operating hole, and the other end is closed; the support plate can be slidably engaged in the slide groove, and the elastic member is a spring abutting against the support plate and the closed end of the slide groove.

[0008] 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.

[0009] Furthermore, the pressure ring has an annular groove extending in the circumferential direction, a rubber ring is installed in the annular groove, and the thickness of the rubber ring is greater than the depth of the annular groove.

[0010] In this way, the rubber ring can be protruded on the pressure ring, thereby forming insulation between the pressure head and the sealing pin to avoid short circuit.

[0011] Furthermore, both sides of the substrate are provided with horizontally arranged linear telescopic mechanisms, and the lifting mechanism is installed at the telescopic ends of the linear telescopic mechanisms.

[0012] Furthermore, the lifting mechanism and the linear telescopic mechanism are both cylinders.

[0013] 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.

[0014] 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.

[0015] Furthermore, four welding holes are evenly distributed along the circumference of the pressure head.

[0016] In summary, the utility model has the advantages of easy operation, convenient welding positioning, and beneficial to ensuring the welding sealing and reliability of the sealing nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the base plate and the support plate.

[0019] Figure 3 It is a schematic diagram of the structure of the pressure head. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the embodiments.

[0021] When implementing: Figure 1 and Figure 2 As shown, a sealing nail auxiliary welding device for a battery injection hole comprises a horizontally arranged substrate 1, on which an operation hole 11 corresponding to the injection hole is provided; the operation hole 11 has two radially slidably symmetrically arranged support plates 2, and an elastic member is provided between the support plates 2 and the substrate 1 to move the support plates 2 toward the middle of the operation hole 11; the two support plates 2 have semicircular grooves on opposite sides, and the grooves on the two support plates 2 are combined to form a positioning hole 21, and the positioning hole 21 comprises a supporting hole section 211 and a positioning hole section 212, the inner diameter of the supporting hole section 211 is consistent with the diameter of the sealing nail, and the positioning hole 212 is provided in the inner diameter of the supporting hole section 211. The hole section 212 is located below the supporting hole section 211 and has a smaller diameter than the supporting hole section 211; a conical guide hole section 213 is connected between the supporting hole section 211 and the positioning hole section 212; a pressure head 3 is provided above the substrate 1 and can be coaxially arranged opposite to the sealing nail to be welded, and at least two welding holes 31 are axially through-through and evenly distributed along the circumferential direction on the pressure head 3, and the circumscribed circle diameter of the two welding holes 31 is smaller than the diameter of the sealing nail to be welded; vertically arranged lifting mechanisms 4 are provided on both sides of the substrate 1, and horizontally arranged support rods 5 are mounted at the lifting ends of the two lifting mechanisms 4, and the pressure head 3 is installed on the support rods 5. Figure 2 As shown, the bottom of the base plate 1 has a radially arranged slide groove, one end of which is connected to the operating hole 11 and the other end is closed; the support plate 2 can be slidably engaged in the slide groove, and the elastic member is a spring abutting against the support plate 2 and the closed end of the slide groove.

[0022] like Figure 1As shown, both sides of the substrate 1 are provided with horizontally arranged linear telescopic mechanisms 6, and the lifting mechanism 4 is installed at the telescopic end of the linear telescopic mechanism 6. In this embodiment, the lifting mechanism 4 and the linear telescopic mechanism 6 are both cylinders.

[0023] 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. Figure 3 As shown, the pressure ring 32 has an annular groove 33 extending in the circumferential direction, and a rubber ring (not shown in the figure) is installed in the annular groove 33, and the thickness of the rubber ring is greater than the depth of the annular groove 33. In this way, the rubber ring can be protruded on the pressure ring, so that insulation is formed between the pressure head and the sealing nail to avoid short circuit. 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. The upper end of the pressure head 3 has a flange 34 that protrudes radially outward, and the flange 34 has a through-set bolt hole. 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 a screw passing through the bolt hole. The welding holes 31 are evenly distributed in four along the circumference of the pressure head 3.

[0024] With the sealing nail auxiliary welding device of this embodiment, since the inner diameter of the supporting hole section is consistent with the diameter of the sealing nail, the sealing nail can be placed in the supporting hole section before welding, and then the support rod is driven downward by two lifting mechanisms, and the sealing nail is squeezed downward by the pressure head. The sealing nail is guided by the conical guide hole section, and the two support plates are squeezed to both sides, and smoothly moved down to the injection hole of the battery. After the pressure head completely presses the sealing nail, spot welding can be performed on the sealing nail through the welding hole on the pressure head, so that the sealing nail can be accurately positioned on the injection hole, which is convenient for subsequent circumferential welding for sealing. The above structure can easily place the sealing nail through the structure of the support plate and the positioning hole, so that it can be assembled and pressed by the pressure head, and the operation is more convenient.

[0025] During implementation, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A sealing nail auxiliary welding device for a battery filling hole, characterized in that: The invention comprises a horizontally arranged substrate (1), wherein an operating hole (11) corresponding to the injection hole is provided through the substrate (1); the operating hole (11) has two radially slidably symmetrically arranged support plates (2), and an elastic member is provided between the support plates (2) and the substrate (1) to enable the support plates (2) to move toward the middle of the operating hole (11); the two support plates (2) have semicircular grooves on opposite sides, and the grooves on the two support plates (2) are combined to form a positioning hole (21), and the positioning hole (21) comprises a supporting hole section and a positioning hole section, the inner diameter of the supporting hole section is consistent with the diameter of the sealing nail, and the positioning hole section is located at The support hole section is located below the support hole section and has a smaller diameter than the support hole section; a conical guide hole section is connected between the support hole section and the positioning hole section; a pressure head (3) is provided above the substrate (1) and can be coaxially arranged opposite to the sealing pin to be welded, and at least two welding holes (31) are axially through-arranged and evenly distributed along the circumferential direction on the pressure head (3), and the circumscribed circle diameter of the two welding holes (31) is smaller than the diameter of the sealing pin to be welded; vertically arranged lifting mechanisms (4) are provided on both sides of the substrate (1), and horizontally arranged support rods (5) are mounted at the lifting ends of the two lifting mechanisms (4), and the pressure head (3) is installed on the support rods (5).

2. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 1, characterized in that: The bottom of the base plate (1) has a radially arranged slide groove, one end of which is connected to the operating hole (11) and the other end is closed; the support plate (2) is slidably engaged in the slide groove, and the elastic member is a spring abutting against the support plate (2) and the closed end of the slide groove.

3. The sealing nail auxiliary welding device for the battery liquid injection hole 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).

4. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 3, characterized in that: The pressure ring (32) is provided with an annular groove extending in the circumferential direction, a rubber ring is installed in the annular groove, and the thickness of the rubber ring is greater than the depth of the annular groove.

5. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 1, characterized in that: Both sides of the base plate (1) are provided with horizontally arranged linear telescopic mechanisms (6), and the lifting mechanism (4) is installed at the telescopic ends of the linear telescopic mechanisms (6).

6. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 5, characterized in that: The lifting mechanism (4) and the linear telescopic mechanism (6) are both cylinders.

7. The sealing nail auxiliary welding device for the battery liquid injection hole 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.

8. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 7, 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.

9. The sealing nail auxiliary welding device for the battery liquid injection hole according to claim 1, characterized in that: Four welding holes (31) are evenly distributed along the circumference of the pressure head (3).

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