A lithium-ion battery spot welding positioning fixture

Abstract

The utility model discloses a lithium ion battery spot welding positioning fixture, comprising a base plate, a spot welding machine is fixedly installed on the top side of the base plate, four supporting columns are fixedly installed on the top side of the base plate, a same placing box is fixedly installed on the top sides of the four supporting columns, a first clamping plate and a second clamping plate are respectively arranged on two sides of the placing box, a protective pad is fixedly installed on the side where the first clamping plate and the second clamping plate are close to each other, a fixing column is fixedly installed on the top side of the base plate, a gear is movably sleeved on the outer side of the fixing column, when the gear rotates counterclockwise, the first tooth plate moves in the opposite direction, so that the first clamping plate and the second clamping plate are separated from each other, and when the first connecting plate is pushed forward, the gear rotates clockwise, so that the first clamping plate and the second clamping plate are close to each other, so that lithium ion batteries of different sizes can be clamped, and stable clamping can avoid the occurrence of undesirable phenomena such as fried welding, false welding or spot welding deviation during welding.

Description

Technical Field

[0001] The utility model relates to the technical field of battery welding positioning, in particular to a lithium ion battery spot welding positioning fixture. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes: when charging, Li+ is de-embedded from the positive electrode and embedded into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the opposite is true. In order to meet the needs of various electronic products, lithium-ion batteries need to be connected into battery packs to obtain the required voltage.

[0003] When lithium-ion batteries are connected to the positive and negative electrodes on the protection board, spot welding is required. However, most existing welding methods use manual spot welding. Since the welding process is performed manually, the lithium-ion battery is easily separated from the protection board during manual welding. If the lithium-ion battery is not fixed before welding, it will cause undesirable phenomena such as blown welds, cold welds or spot welding deviation. Therefore, a lithium-ion battery spot welding positioning fixture is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a lithium-ion battery spot welding positioning fixture for solving the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A lithium-ion battery spot welding positioning fixture comprises a base plate, a spot welding machine is fixedly installed on the top side of the base plate, four support columns are fixedly installed on the top side of the base plate, a same placement box is fixedly installed on the top sides of the four support columns, a first clamping plate and a second clamping plate are respectively provided on both sides of the placement box, a protective pad is fixedly installed on the side of the first clamping plate and the second clamping plate close to each other, a fixing column is fixedly installed on the top side of the base plate, a gear is movably sleeved on the outer side of the fixing column, a limiting ring is fixedly sleeved on the outer side of the fixing column, the bottom side of the limiting ring contacts the top side of the gear, a fixing rod is fixedly sleeved on the top side of the fixing column, a guide assembly is provided between the fixing rod and the first clamping plate and the second clamping plate, and a linkage assembly is provided on the top side of the base plate.

[0007] Preferably, the guide assembly includes sliding grooves on both sides of the fixing rod, and the first connecting plate and the second connecting plate are fixedly mounted on the bottom sides of the first clamping plate and the second clamping plate respectively.

[0008] Preferably, a group of sliding blocks are fixedly mounted on the bottom sides of the first connecting plate and the second connecting plate, each group of sliding blocks has two sliding blocks, and the two groups of sliding blocks are symmetrically arranged and are slidably arranged in the sliding grooves defined by the fixing rods.

[0009] Preferably, the linkage assembly includes a first connecting plate and a second connecting plate, the bottom sides of which are respectively fixedly mounted with a second tooth plate and a first tooth plate, and the sides of the first tooth plate and the second tooth plate close to each other are both engaged with the gear.

[0010] Preferably, two limiting rods are fixedly mounted on the top side of the bottom plate, and the sides of the two limiting rods that are close to each other are respectively fitted with the sides of the first tooth plate and the second tooth plate that are far away from each other.

[0011] Preferably, a fixing plate is fixedly mounted on the top side of the base plate, an electric push rod is fixedly mounted on one side of the fixing plate, and an output end of the electric push rod passes through the fixing plate and is fixedly connected to one side of the first connecting plate.

[0012] Preferably, a partition plate and a placement block are fixedly mounted on the bottom inner wall of the placement box, respectively. The placement block is located between the partition plate and one side inner wall of the placement box, and the output end of the spot welding machine is located above the placement block.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the lithium-ion battery spot welding positioning fixture, by starting the electric push rod to pull the first connecting plate backward, the first connecting plate moving backward can drive the second tooth plate to move horizontally, and when the second tooth plate moves backward, it will drive the gear to rotate counterclockwise, and when the gear rotates counterclockwise, the first tooth plate moves in the opposite direction, so that the first clamping plate and the second clamping plate are separated from each other, and when the first connecting plate is pushed forward, the gear will rotate clockwise, so that the first clamping plate and the second clamping plate are close to each other, so that lithium-ion batteries of different sizes can be clamped, and the stable clamping can avoid the occurrence of undesirable phenomena such as fried welds, false welds or spot welding offset during the welding process.

[0014] By setting the two sets of sliding blocks and the sliding grooves opened by the fixed rod, when the first connecting plate and the second connecting plate move back and forth, it can always ensure that the first connecting plate and the second connecting plate move along the top side of the fixed rod, and can play a guiding and limiting role during movement to avoid deviation. Moreover, by setting the limiting rods, the two limiting rods can limit the first tooth plate and the second tooth plate when they move, and can also play a guiding role during movement, so that they can move more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0016] Figure 2 The utility model structure Figure 1 Partial schematic diagram of part A in the middle;

[0017] Figure 3 This is a schematic diagram of some parts of the fixing rod structure of the utility model;

[0018] Figure 4 This is a schematic diagram of some parts of the gear structure of the utility model.

[0019] In the figure: 1. bottom plate; 2. spot welding machine; 3. support column; 4. placement box; 5. partition; 6. placement block; 7. fixed column; 8. gear; 9. limit ring; 10. fixed rod; 11. slide groove; 12. first clamping plate; 13. second clamping plate; 14. protection pad; 15. first connecting plate; 16. second connecting plate; 17. slider; 18. first tooth plate; 19. second tooth plate; 20. limit rod; 21. fixed plate; 22. electric push rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-4A lithium-ion battery spot welding positioning fixture comprises a bottom plate 1, a spot welding machine 2 is fixedly installed on the top side of the bottom plate 1, four support columns 3 are fixedly installed on the top side of the bottom plate 1, a same placement box 4 is fixedly installed on the top side of the four support columns 3, a first clamping plate 12 and a second clamping plate 13 are respectively arranged on both sides of the placement box 4, a protective pad 14 is fixedly installed on the side where the first clamping plate 12 and the second clamping plate 13 are close to each other, a fixing column 7 is fixedly installed on the top side of the bottom plate 1, a gear 8 is movably sleeved on the outer side of the fixing column 7, a limiting ring 9 is fixedly sleeved on the outer side of the fixing column 7, the bottom side of the limiting ring 9 contacts the top side of the gear 8, a fixing rod 10 is fixedly sleeved on the top side of the fixing column 7, and a guide component is arranged between the fixing rod 10 and the first clamping plate 12 and the second clamping plate 13 A linkage assembly is provided on the top side of the bottom plate 1, and the linkage assembly includes a first connecting plate 15 and a second connecting plate 16, on which a second tooth plate 19 and a first tooth plate 18 are fixedly installed on the bottom sides respectively, and the sides of the first tooth plate 18 and the second tooth plate 19 close to each other are meshed with the gear 8, and two limit rods 20 are fixedly installed on the top side of the bottom plate 1, and the sides of the two limit rods 20 close to each other are respectively fitted with the sides of the first tooth plate 18 and the second tooth plate 19 far away from each other, and a fixing plate 21 is fixedly installed on the top side of the bottom plate 1, and an electric push rod 22 is fixedly installed on one side of the fixing plate 21, and the output end of the electric push rod 22 passes through the fixing plate 21 and is fixedly connected to one side of the first connecting plate 15. When lithium-ion batteries of different sizes need to be welded, by starting the electric push rod 2 2 pulls the first connecting plate 15 backward, and then the first connecting plate 15 moves backward to drive the second tooth plate 19 to move horizontally, and because the first tooth plate 18 and the second tooth plate 19 are both engaged with the gear 8, when the second tooth plate 19 moves backward, it will drive the gear 8 to rotate counterclockwise, and while the gear 8 rotates, the first tooth plate 18 moves in the opposite direction, so that the first clamping plate 12 and the second clamping plate 13 are separated from each other, and then the distance between the first clamping plate 12 and the second clamping plate 13 can be adjusted according to the size of the lithium-ion battery. After placing a lithium-ion battery with a larger size, the electric push rod 22 is started to drive the first connecting plate 15 to move forward, and then the first connecting plate 15 drives the second tooth plate 19 to move horizontally, and then the gear 8 is synchronously driven clockwise. When the gear 8 rotates clockwise, the first tooth plate 18 is driven to move toward the fixed plate 21, and then the first clamping plate 12 and the second clamping plate 13 are close to each other, so the lithium-ion battery can be clamped. A protective pad 14 is provided on the side where the first clamping plate 12 and the second clamping plate 13 are close to each other, which can protect the two sides of the lithium-ion battery from being clamped. The distance between the first clamping plate 12 and the second clamping plate 13 can be adjusted to clamp lithium-ion batteries of different sizes. The stable clamping can avoid the occurrence of undesirable phenomena such as fried welding, cold welding or spot welding deviation during the welding process. The limiting rods 20 are provided, and the two limiting rods 20 can limit the first tooth plate 18 and the second tooth plate 19 when they move.It can also play a guiding role when moving, allowing it to move more stably.

[0022] Specifically, the guide assembly includes a sliding groove 11 on both sides of the fixed rod 10, and the first connecting plate 15 and the second connecting plate 16 are fixedly installed on the bottom sides of the first clamping plate 12 and the second clamping plate 13 respectively, and a group of sliders 17 are fixedly installed on the bottom sides of the first connecting plate 15 and the second connecting plate 16. The number of sliders in each group is two, and the two groups of sliders 17 are symmetrically arranged and are slidably arranged in the sliding groove 11 opened on the fixed rod 10. Through the two groups of sliders 17 and the sliding groove 11 opened on the fixed rod 10, when the first connecting plate 15 and the second connecting plate 16 move back and forth, it can always ensure that the first connecting plate 15 and the second connecting plate 16 move along the top side of the fixed rod 10, and can play a guiding and limiting role during movement to avoid displacement.

[0023] Specifically, a partition 5 and a placement block 6 are fixedly installed on the bottom inner wall of the placement box 4, and the placement block 6 is located between the partition 5 and the inner wall of one side of the placement box 4. The output end of the spot welder 2 is located above the placement block 6. The placement box 4 is divided into two areas by providing a partition 5, and the lithium-ion battery and the protection board can be placed in each area separately. When placing the protection board, you only need to place the positive and negative poles of the protection board facing upwards. When placing the lithium-ion battery, you only need to place the positive and negative poles of the lithium-ion battery on the positive and negative poles of the protection board, and then you can start the spot welder 2 for welding.

[0024] The lithium-ion battery spot welding positioning fixture is connected to a 220V mains power supply, and the main controller can be a conventional known device for control such as a computer.

[0025] When in use: by placing the protective plate on the placement block 6, and placing the positive and negative poles of the protective plate upwards, then placing the lithium-ion battery in the placement box 4, and making the positive and negative poles of the lithium-ion battery contact with the positive and negative poles on the protective plate, the spot welding machine 2 can be started, and the spot welding machine 2 can perform welding processing when it is running. When it is necessary to weld lithium-ion batteries of different sizes, the first connecting plate 15 is pulled backward by starting the electric push rod 22, and then the first connecting plate 15 can drive the second tooth plate 19 to move horizontally when it moves backward. Because the first tooth plate 18 and the second tooth plate 19 are both engaged with the gear 8, when the second tooth plate 19 moves backward, it will drive the gear 8 to rotate counterclockwise. When the gear 8 rotates, the first tooth plate 18 moves in the opposite direction, so that the first clamping plate 12 and the second clamping plate 13 are moved away from each other, and then the lithium-ion battery can be welded according to the size of the lithium-ion battery. The distance between the first clamping plate 12 and the second clamping plate 13 can be adjusted according to the size. After placing a lithium-ion battery of a larger size, the electric push rod 22 is started to drive the first connecting plate 15 to move forward. Subsequently, the first connecting plate 15 drives the second toothed plate 19 to translate and synchronously drives the gear 8 to rotate clockwise. When the gear 8 rotates clockwise, it drives the first toothed plate 18 to move toward the fixed plate 21, and then the first clamping plate 12 and the second clamping plate 13 will be close to each other, and the lithium-ion battery can be clamped. A protective pad 14 is provided on the side where the first clamping plate 12 and the second clamping plate 13 are close to each other, which can protect the two sides of the lithium-ion battery from being clamped. The distance between the first clamping plate 12 and the second clamping plate 13 can be adjusted, so that lithium-ion batteries of different sizes can be clamped. Stable clamping can avoid the occurrence of undesirable phenomena such as fried welding, cold welding or spot welding deviation during welding.

[0026] 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.

[0027] 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-ion battery spot welding positioning fixture, comprising a base plate (1), characterized in that: The top side of the base plate (1) is fixedly mounted with a spot welder (2); four support columns (3) are fixedly mounted on the top side of the base plate (1); the top sides of the four support columns (3) are fixedly mounted with a same placement box (4); the two sides of the placement box (4) are respectively provided with a first clamping plate (12) and a second clamping plate (13); the sides of the first clamping plate (12) and the second clamping plate (13) close to each other are fixedly mounted with a protection pad (14); the top side of the base plate (1) is fixedly mounted with a fixed column (7); the outer side of the fixed column (7) is movably sleeved with a gear (8); the outer side of the fixed column (7) is fixedly sleeved with a limiting ring (9); the bottom side of the limiting ring (9) is in contact with the top side of the gear (8); the top side of the fixed column (7) is fixedly sleeved with a fixed rod (10); a guide assembly is provided between the fixed rod (10) and the first clamping plate (12) and the second clamping plate (13); and the top side of the base plate (1) is provided with a linkage assembly.

2. A lithium-ion battery spot welding positioning fixture according to claim 1, characterized in that: The guide assembly comprises a fixed rod (10) with sliding grooves (11) on both sides, and a first connecting plate (15) and a second connecting plate (16) are fixedly mounted on the bottom sides of the first clamping plate (12) and the second clamping plate (13) respectively.

3. A lithium-ion battery spot welding positioning fixture according to claim 2, characterized in that: A group of sliders (17) are fixedly mounted on the bottom sides of the first connecting plate (15) and the second connecting plate (16), each group of sliders (17) has two sliders, and the two groups of sliders (17) are symmetrically arranged and are slidably arranged in the sliding groove (11) provided on the fixed rod (10).

4. A lithium-ion battery spot welding positioning fixture according to claim 1, characterized in that: The linkage assembly comprises a first connecting plate (15) and a second connecting plate (16), the bottom sides of which are respectively fixedly mounted a second tooth plate (19) and a first tooth plate (18); the sides of the first tooth plate (18) and the second tooth plate (19) that are close to each other are both engaged with the gear (8).

5. A lithium-ion battery spot welding positioning fixture according to claim 4, characterized in that: Two limiting rods (20) are fixedly mounted on the top side of the bottom plate (1), and the sides of the two limiting rods (20) that are close to each other are respectively in contact with the sides of the first tooth plate (18) and the second tooth plate (19) that are far away from each other.

6. A lithium-ion battery spot welding positioning fixture according to claim 1, characterized in that: A fixing plate (21) is fixedly mounted on the top side of the bottom plate (1), an electric push rod (22) is fixedly mounted on one side of the fixing plate (21), and an output end of the electric push rod (22) passes through the fixing plate (21) and is fixedly connected to one side of the first connecting plate (15).

7. A lithium-ion battery spot welding positioning fixture according to claim 1, characterized in that: A partition plate (5) and a placement block (6) are fixedly mounted on the bottom inner wall of the placement box (4), the placement block (6) is located between the partition plate (5) and the inner wall of one side of the placement box (4), and the output end of the spot welding machine (2) is located above the placement block (6).

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