Welding fixture for zinc-based battery leading-out terminal butt-welding process

Abstract

The utility model belongs to the technical field of batteries, particularly relates to a welding fixture for a zinc-based battery leading-out terminal butt-welding process, and provides the following scheme aiming at the problems that screws in a screwing mode are loosened, argon arc welding spots are uneven, and the leading-out terminal is inclined after being assembled: the welding fixture comprises a bottom plate, four corners of the bottom of the bottom plate are respectively provided with a supporting leg, and the supporting legs are arranged on the bottom of the bottom plate; the bottom plate is used for supporting the whole, and a machine body is mounted at the top of the bottom plate; the control box is installed on the side face of the machine body and used for conducting electric appliance control on the whole. And the protective cover is of a rectangular cover structure, is mounted on the front side of the machine body through screws, is assembled by a transparent acrylic plate and is used for protecting the welding position of the butt-welding machine. The shapes of the upper leading-out terminal welding lower die and the leading-out terminal upper pressing die are manufactured according to the styles of the leading-out terminal and the connecting piece, the shapes of the leading-out terminal and the connecting piece are not changed after welding, and the problems that argon arc welding spots are not flat, and the leading-out terminal is inclined after assembly are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a welding fixture for a zinc-based battery lead-out terminal butt welding process. Background Art

[0002] In the production process of zinc-based batteries, the total positive and negative terminals of the battery cell tabs need to be led out of the battery casing. The current technology mainly has the following two methods:

[0003] Use screw connection method: punch round holes where the total positive and negative lugs are connected to the lead-out terminals, pass screws through the round holes, and use screws and nuts to press and lock the total positive and negative lugs to the corresponding lead-out terminals.

[0004] Use argon arc welding: overlap the total positive and negative tabs with the bottom plane of the lead-out terminal respectively, and use argon arc welding to melt the edges of the tabs and terminals to connect them together.

[0005] Defects of existing technology:

[0006] 1. Screw connection: Use screws to fix the positive and negative tabs. After the battery is assembled, the screws may loosen when the battery is subjected to external forces such as transportation and operation, resulting in poor connection between the tabs.

[0007] 2. Argon arc welding method: The connecting piece connecting the positive and negative tabs to the lead-out terminals is a multi-layer metal sheet, and the lead-out terminal is an integrated copper block. The welding temperature requirements on the two sides during argon arc welding are different. When welding, the high temperature melts the connecting piece metal sheet and the lead-out terminal copper block. One side of the connecting piece will melt first, causing all the molten copper liquid to flow to one side of the connecting piece. After solidification, the solder joint is uneven, and the lead-out terminal will appear skewed after assembly. Utility Model Content

[0008] The utility model aims to solve the shortcomings of loose screws in the screw connection mode, uneven argon arc welding spots and skewed lead terminals after assembly, and proposes a welding fixture for the butt welding process of zinc-based battery lead terminals.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A welding fixture for a zinc-based battery terminal butt welding process, comprising:

[0011] A bottom plate, wherein the four corners of the bottom plate are provided with legs for supporting the whole, and the top of the bottom plate is provided with an organism;

[0012] The control box is installed on the side of the machine body and is used to control the overall electrical system;

[0013] The protective cover is a rectangular cover structure, which is installed on the front side of the machine body by screws. It is assembled from transparent acrylic plates to protect the welding position of the welding machine and prevent the operator from being injured by the current and high temperature during welding.

[0014] The die cylinder is installed on the top of the protective cover. The output shaft of the die cylinder is equipped with a lead terminal upper die. It is used for pressing when welding the connecting piece and the lead terminal. It is made of graphite. When the upper and lower dies of the welding machine are energized, the internal resistance of the lead terminal upper die is too large, resulting in high temperature.

[0015] The positioning support is welded to the front of the machine body, and an electric cylinder is installed at the bottom. The output shaft of the electric cylinder extends to the top of the positioning support and is installed with a lead terminal welding lower mold. The lead terminal welding lower mold cooperates with the lead terminal upper pressure mold for welding the battery lead terminal. The lead terminal welding lower mold is used for positioning during welding. It is made of graphite. When the upper and lower molds of the butt welding machine are energized, the high temperature generated by the excessive internal resistance of the lead terminal welding lower mold can weld the connecting piece and the lead terminal together under the pressure of the upper and lower molds.

[0016] Preferably, an upper die bracket is welded to the front of the machine body, and the output end of the die cylinder is slidably connected to the upper die bracket.

[0017] Preferably, a connecting piece fixing clamp is installed on the lead terminal welding lower mold. The connecting piece is composed of multiple layers of thin copper sheets, which are flatly clamped by the connecting piece fixing clamp. The surface of the connecting piece fixing clamp is wrapped with cloth strips, and the cloth strips are moisturized by adding water. Except for the welding end, the connecting piece is tightly wrapped by the cloth strips on the surface of the clip, which can prevent the connecting piece from being oxidized due to high temperature during welding.

[0018] Preferably, upper and lower welding positioning blocks are installed on the outer side of the lead-out terminal welding lower mold by screws. The upper and lower welding positioning blocks are used to adjust the welding position of the connecting piece up and down. The connecting piece fixing clamp is placed in the positioning groove of the upper and lower welding positioning blocks. The upper and lower heights of the upper and lower welding positioning blocks are adjusted to adjust the position of the connecting piece to the lead-out terminal position so that the bottom surface of the connecting piece contacts the top surface of the lead-out terminal.

[0019] Preferably, a positioning groove is provided on the top of the upper and lower welding positioning blocks, and the positioning groove is installed with welding front and rear positioning blocks. The positions of the welding front and rear positioning blocks are adjusted. The welding front and rear positioning blocks are used to position the front and rear positions of the connecting piece fixing clamp, and the welding front and rear positions of the connecting piece and the lead-out terminal are adjusted.

[0020] Preferably, an upper pressing groove is provided at the bottom of the upper pressing die of the lead terminal.

[0021] Preferably, a rectangular box is installed on the top of the bottom plate, a plurality of pull-out holes are opened on the front of the rectangular box, and a collection box is movably installed in each of the plurality of pull-out holes, and a drawer plate is provided on the front of the collection box.

[0022] Preferably, a through hole is opened on the front side of the protective cover, and the upper and lower welding positioning blocks are movably installed in the through hole.

[0023] In the present invention, the beneficial effects of the welding fixture for the butt welding process of the zinc-based battery lead-out terminal are as follows:

[0024] The connecting piece on the fixing clamp of this solution is composed of multiple layers of thin copper sheets, and the lead terminal is a threaded copper block. During butt welding, a high current is passed to heat the lead terminal welding seat, and the connecting piece and the lead terminal are heated by high temperature. The die cylinder drives the die on the lead terminal to apply pressure to it, so that the heated lead terminal and the connecting piece are welded together. During the heating process of the connecting piece, it is easy to cause problems. The cloth strip on the connecting piece fixing clamp is wet and wraps the connecting piece, which can effectively prevent the oxidation of the connecting piece.

[0025] The shapes of the upper lead terminal welding lower die and the lead terminal upper pressing die of the utility model are made according to the styles of the lead terminal and the connecting piece. The shapes of the lead terminal and the connecting piece remain unchanged after welding, which effectively solves the problem of uneven argon arc welding points and skewed lead terminals after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a welding fixture for the butt welding process of zinc-based battery lead-out terminals proposed in the utility model;

[0027] Figure 2 The utility model proposed Figure 1 Schematic diagram of the structure of the protective cover removed;

[0028] Figure 3 The utility model proposed Figure 2 Schematic diagram of the structure viewed from above;

[0029] Figure 4 The utility model proposed Figure 2 Schematic diagram of the structure of part A;

[0030] Figure 5 This is a bottom-up structural diagram of the rectangular box, drawer board, electric push rod and related parts proposed by the utility model;

[0031] Figure 6 This is a structural schematic diagram of the collection box and drawer board proposed in the utility model.

[0032] In the figure: 1. Lower die for welding lead-out terminals; 2. Upper and lower positioning blocks for welding; 21. Positioning groove; 22. Positioning support; 23. Electric cylinder; 3. Front and rear positioning blocks for welding; 4. Connecting piece fixing clamp; 5. Upper die for lead-out terminals; 51. Upper die groove; 52. Upper die bracket; 6. Die cylinder; 7. Protective cover; 8. Bottom plate; 9. Support legs; 10. Control box; 11. Machine body; 12. Rectangular box; 13. Drawer board; 14. Collection box; 15. Lifting plate; 16. Roller; 17. Electric push rod. DETAILED DESCRIPTION

[0033] The technical solution of this embodiment will be clearly and completely described below in conjunction with the drawings in this embodiment. Obviously, the described embodiment is only a part of this embodiment, rather than all the embodiments.

[0034] Example 1

[0035] The following combination Figures 1-6 This application is described in further detail.

[0036] A welding fixture for a zinc-based battery terminal butt welding process, comprising:

[0037] A bottom plate 8, wherein the bottom four corners of the bottom plate 8 are provided with legs 9 for supporting the whole, and an organic body 11 is installed on the top of the bottom plate 8;

[0038] The control box 10 is installed on the side of the body 11 and is used to control the entire electrical system;

[0039] The protective cover 7 is a rectangular cover structure, which is installed on the front side of the body 11 by screws. It is assembled from a transparent acrylic plate and protects the welding position of the welding machine to prevent the current and high temperature during welding from injuring the operator;

[0040] The die cylinder 6 is installed on the top of the protective cover 7. The output shaft of the die cylinder 6 is equipped with the lead terminal upper die 5, which is used for pressing the connecting piece and the lead terminal when welding. It is made of graphite. When the upper and lower dies of the welding machine are energized, the lead terminal upper die 5 has a high internal resistance and generates high temperature.

[0041] The positioning support 22 is welded to the front of the body 11, and an electric cylinder 23 is installed at the bottom. The output shaft of the electric cylinder 23 extends to the top of the positioning support 22 and is installed with a lead terminal welding lower mold 1. The lead terminal welding lower mold 1 is matched with the lead terminal upper pressure mold 5 for welding the battery lead terminal. The lead terminal welding lower mold 1 is used for positioning during welding. It is made of graphite. When the upper and lower molds of the butt welding machine are energized, the high temperature generated by the excessive internal resistance of the lead terminal welding lower mold can weld the connecting piece and the lead terminal together under the pressure of the upper and lower molds.

[0042] In this embodiment, an upper die bracket 52 is welded to the front of the machine body 11 , and the output end of the die cylinder 6 is slidably connected to the upper die bracket 52 .

[0043] In this embodiment, a connecting piece fixing clamp 4 is installed on the lead terminal welding lower mold 1. The connecting piece is composed of multiple layers of thin copper sheets, which are flatly clamped by the connecting piece fixing clamp 4. The surface of the connecting piece fixing clamp 4 is wrapped with a cloth strip, and the cloth strip is moisturized by water. Except for the welding end, the connecting piece is tightly wrapped by the cloth strip on the surface of the clamp to prevent the connecting piece from being oxidized due to high temperature during welding.

[0044] In this embodiment, the outer side of the lead-out terminal welding lower mold 1 is installed with welding upper and lower positioning blocks 2 by screws. The welding upper and lower positioning blocks 2 are used to adjust the welding position of the connecting piece up and down. The connecting piece fixing clamp 4 is placed in the positioning groove of the welding upper and lower positioning blocks. The upper and lower heights of the welding upper and lower positioning blocks are adjusted to adjust the position of the connecting piece to the lead-out terminal position so that the bottom surface of the connecting piece contacts the top surface of the lead-out terminal.

[0045] In this embodiment, a positioning groove 21 is provided on the top of the upper and lower welding positioning blocks 2, and the positioning groove 21 is installed with a welding front and rear positioning block 3. The position of the welding front and rear positioning blocks 3 is adjusted. The welding front and rear positioning blocks 3 are used to position the front and rear positions of the connecting piece fixing clamp 4, and the welding front and rear positions of the connecting piece and the lead-out terminal are adjusted.

[0046] In this embodiment, an upper pressing groove 51 is formed at the bottom of the lead terminal upper pressing mold 5 .

[0047] In this embodiment, a rectangular box 12 is installed on the top of the bottom plate 8. A plurality of pull-out holes are opened on the front of the rectangular box 12. Collection boxes 14 are movably installed in the plurality of pull-out holes. A drawer board 13 is provided on the front of the collection box 14.

[0048] In this embodiment, a through hole 71 is opened on the front of the protective cover 7 , and the upper and lower welding positioning blocks 2 are movably installed in the through hole 71 .

[0049] Working principle: When the present invention is butt-welded, the lead terminal welding lower die 1 is made according to the lead terminal style and size required for welding, the threaded rod of the lead terminal is in the lead terminal welding lower die, and one side welded with the connecting piece is on the lower die, the welding lower die is centered in the upper and lower welding positioning blocks 2 and is installed on the protective cover outside the welding lower die, the front and rear positioning blocks are fixed on the upper and lower welding positioning blocks, and the front and rear distance of the connecting piece welding can be adjusted in the guide groove of the upper and lower welding positioning blocks so that the connecting piece is welded at the required position of the lead terminal; put the connecting piece into the connecting piece fixing clamp, adjust the position of the front and rear positioning blocks to ensure that the front of the clamped connecting piece is The end is flush with the lead-out terminal, and the rear end positioning of the connecting piece fixing clip is aligned with the positioning blocks before and after welding; after the lead-out terminal and the connecting piece are placed, press the start switch, and the die cylinder 6 pushes the upper die 5 of the lead-out terminal to move downward, pressing the connecting piece and the lead-out terminal. The heat of the upper and lower dies of the lead-out terminal brings the metal atoms of the connecting piece and the lead-out terminal close to the lattice distance to form a metal bond, and produces a sufficient amount of common grains on the bonding surface to be welded, so that the connecting piece and the lead-out terminal are integrated. After the terminal welding is completed, the upper die of the lead-out terminal returns to its original position, and the lead-out terminal with the connecting piece welded is taken out and placed in ice water for cooling.

[0050] Example 2

[0051] The rest of the embodiment 2 is the same as the embodiment 1, except that: four electric push rods 17 are provided at the bottom of the rectangular box 12, and the same lifting plate 15 is installed on the output shafts of the four electric push rods 17. A plurality of rollers 16 are provided at the bottom of the lifting plate 15. The four electric push rods 17 push the lifting plate 15 to move downward, and the lifting plate 15 drives the four rollers 16 to contact the ground. The four rollers 16 can be used to facilitate the movement of the whole. The four electric push rods 17 are controlled in reverse so that the four rollers 16 are all retracted upward and leave the ground, and supported by four legs 9 to improve the overall stability. This application includes all structural shapes, sizes and materials of embodiment 1. In order to meet specific usage conditions, they can all be selected and adjusted. The accompanying drawings are all schematic structural diagrams, and the specific actual sizes can be appropriately adjusted.

[0052] The above is only a preferred specific implementation method of this embodiment, but the protection scope of this embodiment is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solution and utility model concept of this embodiment within the technical scope disclosed in this embodiment, and they should be covered by the protection scope of this embodiment.

Claims

1. A welding fixture for the butt welding process of zinc-based battery lead-out terminals, characterized in that: include: A bottom plate (8), wherein the bottom four corners of the bottom plate (8) are provided with legs (9) for supporting the whole, and an organic body (11) is installed on the top of the bottom plate (8); A control box (10) is mounted on the side of the machine body (11) and is used to control the entire machine. The protective cover (7) is a rectangular cover structure, which is installed on the front side of the machine body (11) by screws and is assembled from a transparent acrylic plate to protect the welding position of the welding machine; The die cylinder (6) is installed on the top of the protective cover (7). The output shaft of the die cylinder (6) is equipped with a lead terminal upper die (5). The die is used for pressing when the connecting piece and the lead terminal are welded. The die is made of graphite. When the upper and lower dies of the welding machine are energized, the lead terminal upper die (5) generates high temperature due to excessive internal resistance. A positioning support (22) is welded to the front of the body (11), and an electric cylinder (23) is installed at the bottom. The output shaft of the electric cylinder (23) extends to the top of the positioning support (22) and is installed with a lead terminal welding lower die (1). The lead terminal welding lower die (1) cooperates with the lead terminal upper die (5) to weld the battery lead terminal.

2. A welding fixture for the butt welding process of zinc-based battery lead-out terminals according to claim 1, characterized in that: An upper die support (52) is welded to the front of the machine body (11), and the output end of the die cylinder (6) is slidably connected to the upper die support (52).

3. A welding fixture for the butt welding process of zinc-based battery lead-out terminals according to claim 1, characterized in that: The lead terminal welding lower die (1) is provided with a connecting piece fixing clamp (4), the connecting piece is composed of multiple layers of thin copper sheets and is clamped flatly by the connecting piece fixing clamp (4), the surface of the connecting piece fixing clamp (4) is wrapped with a cloth strip, the cloth strip is moisturized by water, and the connecting piece is tightly wrapped by the cloth strip on the surface of the clamp except for the welding end.

4. A welding fixture for the butt welding process of zinc-based battery lead-out terminals according to claim 1, characterized in that: The outer side of the lead-out terminal welding lower die (1) is provided with welding upper and lower positioning blocks (2) via screws.

5. The welding fixture for the butt welding process of the zinc-based battery lead-out terminal according to claim 1, characterized in that: A positioning groove (21) is provided on the top of the upper and lower welding positioning blocks (2), and a welding front and rear positioning block (3) is installed in the positioning groove (21). The position of the welding front and rear positioning blocks (3) is adjusted. The welding front and rear positioning blocks (3) are used to position the front and rear positions of the connecting piece fixing clamp (4), and to adjust the welding front and rear positions of the connecting piece and the lead-out terminal.

6. A welding fixture for the butt welding process of zinc-based battery lead-out terminals according to claim 1, characterized in that: An upper pressing groove (51) is provided at the bottom of the lead terminal upper pressing die (5).

7. A welding fixture for the butt welding process of zinc-based battery lead-out terminals according to claim 1, characterized in that: A rectangular box (12) is installed on the top of the bottom plate (8), and a plurality of pull-out holes are opened on the front of the rectangular box (12). Collection boxes (14) are movably installed in the plurality of pull-out holes, and a drawer board (13) is provided on the front of the collection box (14).

8. The welding fixture for the butt welding process of the zinc-based battery lead-out terminal according to claim 1, characterized in that: A through hole (71) is provided on the front of the protective cover (7), and the upper and lower welding positioning blocks (2) are movably mounted in the through hole (71).

Images