Quickly-positionable limiting tool

Abstract

The utility model belongs to the technical field of limit tooling, specifically relates to a limit tooling of quick positioning, including frock platform, the surface of frock platform is installed and is placed frame of positioning and is placed single -unit battery group, the utility model, when the stepping motor rotates will drive two gear strips to move to one side respectively, two gear strips will drive corresponding docking plate and connecting frame to move respectively. Further will extrude the battery to the center from the both sides of the placed battery, thereby makes the battery to be tightened together. At this moment again a steel band is from the top of battery and is put in the outside of the tightened battery, and the bottom steel band is lifted up and is put in the bottom of battery, the controller reverse drive stepping motor. In this way the fixture will loosen the extrusion to the battery, and the battery will be relieved, thereby is tensioned in two steel bands. The structure of two -way extrusion tightening is used in the above -mentioned mode, so the extrusion force when tightening can be evenly dispersed to the both sides of battery group, to overcome the security risk brought by one -sided stress.

Description

Technical Field

[0001] This utility model belongs to the field of limiting tooling technology, specifically relating to a limiting tooling that can be quickly positioned. Background Technology

[0002] In the lithium battery manufacturing process, assembling multiple individual cells using steel strips is a crucial step in ensuring the structural stability and electrochemical performance consistency of the battery pack. The core design logic of this process is that the steel strips must maintain a stable and durable clamping effect at all times to prevent the batteries from shifting or loosening during subsequent charge-discharge cycles, transportation bumps, or vibrations during use, thereby preventing localized overheating caused by poor contact.

[0003] Based on this requirement, the dimensions of the battery and the steel strip are precisely matched during the process design stage: the size of a single battery cell under normal conditions is slightly larger than the internal capacity of the steel strip. This "interference fit" design may seem to contradict the assembly logic, but it is actually a prerequisite for achieving stable clamping.

[0004] In current industry practice, most production scenarios still use a single-sided extrusion tightening method to complete this crucial step. This type of tooling typically has an extrusion mechanism on only one side of the battery pack, applying pressure from that side to push the battery pack into contraction. However, this single-sided extrusion results in extremely uneven pressure distribution within the battery pack, with the battery closer to the extrusion mechanism experiencing significantly greater extrusion force than other areas. Lithium-ion battery casings are generally quite sensitive to pressure; excessive extrusion force can cause scratches, dents, or even micro-cracks on the casing. This can compromise the battery's sealing performance, leading to electrolyte leakage or the entry of external moisture and impurities into the battery, posing a safety risk. Utility Model Content

[0005] The purpose of this invention is to provide a quick-positioning limiting fixture to address the current industry practice where most production scenarios still rely on single-sided extrusion tightening to complete this crucial step. Such fixtures typically have an extrusion mechanism on only one side of the battery pack, applying pressure from that side to push the battery pack to contract. However, this single-sided extrusion results in extremely uneven pressure distribution within the battery pack, with the battery closer to the extrusion mechanism experiencing significantly greater extrusion force than other areas. Lithium-ion battery casings are generally sensitive to pressure; excessive extrusion force can cause scratches, dents, or even micro-cracks, potentially compromising the battery's sealing performance and leading to electrolyte leakage or the entry of external moisture and impurities into the battery, posing a safety risk.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a limiting fixture that can be quickly positioned, including a fixture table, on the surface of the fixture table is a placement frame for positioning and placing a single battery pack, and a clamp is movably installed on each side of the fixture table of the placement frame.

[0007] A connecting frame is installed at the bottom of the fixture. A mating plate is welded to one side of the connecting frame. A gear rack is welded to one side of the mating plate. A stepper motor is installed in the center area of ​​the bottom of the tooling table. The output end of the stepper motor meshes with two gear racks. A controller for controlling the stepper motor is installed on one outer wall of the tooling table.

[0008] In order to enable the connecting frame to move left and right on the tooling table, thereby driving the clamp to move and achieve the function of clamping the battery pack, as a limiting tooling for quick positioning according to this utility model, preferably, two sets of through slots are symmetrically opened on the surface of the tooling table, and the two vertical plates at the top of the connecting frame pass through each set of through slots and are connected to the bottom of the clamp.

[0009] In order to ensure sufficient clearance between the two sets of mating plates and gear racks so that the top of the stepper motor can rotate between the two gear racks, as a limiting tooling for quick positioning according to this utility model, preferably, the mating plates and gear racks form an irregular Z-shaped structure, and one end of the mating plate is fixedly connected to the center end of one side of the connecting frame.

[0010] In order to enable the gear rack to move stably, as a limiting tooling for quick positioning according to this utility model, preferably, two slide bars are fixedly installed at the bottom of the tooling table, and the two slide bars are parallel to each other.

[0011] The top of the gear rack has a groove, which is movably connected to the arc-shaped outer wall at the bottom of the slide bar, and the length of the groove is three times the length of the slide bar.

[0012] A side bar is fixedly connected to one side of the gear rack. The arc-shaped outer wall of one side of the side bar is movably connected to a notch on the guide bar. The top of the guide bar is fixedly connected to the inner wall of the tooling table.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] First, insert a steel strip into the notch of the placement frame, and then place the batteries to be bundled into the frame one by one. Next, start the stepper motor via the controller, and the stepper motor will rotate. When the stepper motor rotates, it will drive two gear racks to move to one side, and the two gear racks will drive the corresponding docking plates and connecting frames to move, so that the two clamps will move towards the center. This will then squeeze the batteries from both sides towards the center, thus tightening the batteries together. At this point, insert a steel strip from the top of the batteries onto the outside of the tightened batteries, and lift the bottom steel strip upwards to fit over the bottom of the batteries.

[0015] Finally, the controller reverses the drive of the stepper motor. This causes the clamps to release their pressure on the battery, allowing it to relax and become tensioned between the two steel strips. This method employs a bidirectional compression and tightening structure, which evenly distributes the compressive force during tightening to both sides of the battery pack, overcoming the safety hazards caused by unilateral force. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the main view structure provided for an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the stepper motor connection structure from a bottom view, provided in an embodiment of this application.

[0019] Figure 3 This is a top view of the connection structure of the stepper motor provided in an embodiment of this application.

[0020] Figure 4 This is a bottom view of the tooling table surface provided in an embodiment of this application.

[0021] Figure 5 This is a schematic cross-sectional view of the tooling table surface provided in an embodiment of this application.

[0022] In the diagram: 1. Tooling table; 11. Through groove; 12. Guide bar; 13. Sliding bar; 2. Placement frame; 3. Fixture; 4. Connecting frame; 5. Connecting plate; 6. Gear rack; 61. Sliding groove; 62. Side bar; 7. Stepper motor; 8. Controller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 The present invention provides the following technical solution: a limiting fixture that can be quickly positioned, including a fixture table 1, a placement frame 2 for positioning and placing a single battery pack is installed on the surface of the fixture table 1, and a clamp 3 is movably installed on the fixture table 1 on both sides of the placement frame 2.

[0025] Placement frame 2 is a hollow rectangular frame. When in use, the battery blocks can be conveniently and accurately placed in one go through placement frame 2, thus saving the need for subsequent adjustment operations.

[0026] A rubber plate is bonded to the contact end of the clamp 3 and the battery. When the clamp 3 clamps and tightens the battery pack, the rubber plate can protect the battery at the contact end.

[0027] The placement frame 2 has a notch. When in use, a steel strip is pre-stuck into the notch of the placement frame 2. During assembly, the steel strip at the bottom will be tightened to the bottom of the battery pack by adjusting upwards after the battery is tightened.

[0028] A connecting frame 4 is installed at the bottom of the fixture 3. A mating plate 5 is welded to one side of the connecting frame 4. A gear rack 6 is welded to one side of the mating plate 5. A stepper motor 7 is installed in the center area of ​​the bottom of the tooling table 1. The output end of the stepper motor 7 meshes with the two gear racks 6. A controller 8 for controlling the stepper motor 7 is installed on the outer wall of one side of the tooling table 1.

[0029] The controller 8 uses a DKC-S100 fixed-length stepper motor controller. During use, the controller 8 controls the forward and reverse rotation of the stepper motor 7 and can also precisely control the driving distance of the stepper motor 7.

[0030] Preferably, two sets of through slots 11 are symmetrically opened on the surface of the tooling table 1, and the two vertical plates at the top of the connecting frame 4 pass through each set of through slots 11 and are connected to the bottom of the fixture 3.

[0031] In actual use, when the connecting frame 4 moves, it will follow the trajectory of the through groove 11, so that when the connecting frame 4 moves, it can drive the clamp 3 to move in a directional manner;

[0032] Preferably, the mating plate 5 and the gear rack 6 form an irregular Z-shaped structure, and one end of the mating plate 5 is fixedly connected to the center end of one side of the connecting frame 4.

[0033] In practical use, when the stepper motor 7 rotates, it drives the two gear racks 6 to move to the corresponding side. When the gear racks 6 move, they drive the docking plate 5 to move. When the docking plate 5 moves, it drives the connecting frame 4 to move. When the connecting frame 4 moves, it drives the clamp 3 to clamp and move.

[0034] When the rack 6 moves, it moves along the trajectory defined by the guide bar 12 and the slide bar 13 via the slide groove 61 and the side bar 62. In this way, the rack 6 moves more stably, thus maintaining a good meshing transmission structure between the rack 6 and the stepper motor 7.

[0035] Preferably, two slide bars 13 are fixedly installed at the bottom of the tooling table 1, and the two slide bars 13 are parallel to each other;

[0036] A groove 61 is provided at the top of the gear rack 6. The groove 61 is movably connected to the arc-shaped outer wall at the bottom of the slide bar 13, and the length of the groove 61 is three times the length of the slide bar 13.

[0037] A side bar 62 is fixedly connected to one side of the gear rack 6. The arc-shaped outer wall of one side of the side bar 62 is movably connected to the notch on the guide bar 12. The top of the guide bar 12 is fixedly connected to the inner wall of the tooling table 1.

[0038] Working principle: First, a steel strip is placed into the notch of the placement frame 2, and the bundled batteries are placed in the placement frame 2 one by one. Then, the stepper motor 7 is started by the controller 8, and the stepper motor 7 will rotate. When the stepper motor 7 rotates, it will drive the two gear racks 6 to move to one side respectively. The two gear racks 6 will drive the corresponding docking plates 5 and connecting brackets 4 to move respectively, so that the two clamps 3 will move towards the center. Then, the batteries will be squeezed towards the center from both sides, so that the batteries are tightened together. At this time, a steel strip is inserted from the top of the batteries and placed on the outside of the tightened batteries, and the bottom steel strip is lifted up and placed on the bottom of the batteries.

[0039] Finally, the controller 8 reverses the drive of the stepper motor 7. This causes the clamp 3 to release its pressure on the battery, allowing the battery to relax and become tensioned between the two steel straps, thus achieving the overall assembly of the battery.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick positioning limit tooling device comprising a tooling table (1), characterized in that, A placement frame (2) for positioning and placing a single battery pack is installed on the surface of the tooling table (1), and a clamp (3) is movably installed on the tooling table (1) on both sides of the placement frame (2); A connecting frame (4) is installed at the bottom of the fixture (3). A docking plate (5) is welded to one side of the connecting frame (4). A gear rack (6) is welded to one side of the docking plate (5). A stepper motor (7) is installed in the center area at the bottom of the tooling table (1). The output end of the stepper motor (7) meshes with the two gear racks (6). A controller (8) for controlling the stepper motor (7) is installed on the outer wall of one side of the tooling table (1).

2. The positioning tool according to claim 1, wherein: Two sets of through slots (11) are symmetrically opened on the surface of the tooling table (1), and the two vertical plates at the top of the connecting frame (4) pass through each set of through slots (11) and are connected to the bottom of the fixture (3).

3. The positioning tool according to claim 1, wherein: The docking plate (5) and the gear rack (6) form an irregular Z-shaped structure, and one end of the docking plate (5) is fixedly connected to the center end of one side of the connecting frame (4).

4. The positioning tool according to claim 1, wherein: Two slide bars (13) are fixedly installed at the bottom of the tooling table (1), and the two slide bars (13) are parallel to each other.

5. The positioning tool according to claim 1, wherein: The top of the gear rack (6) is provided with a groove (61), which is movably connected to the arc-shaped outer wall at the bottom of the slide bar (13), and the length of the groove (61) is three times the length of the slide bar (13).

6. The positioning tool of claim 1, wherein: A side strip (62) is fixedly connected to one side of the gear rack (6), and the arc-shaped outer wall of one side of the side strip (62) is movably connected to the notch on the guide strip (12).

7. The positioning tool according to claim 6, wherein: The top of the guide bar (12) is fixedly connected to the inner wall of the tooling table (1).

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