Automatic bending device for copper foil flexible busbar

Abstract

The utility model relates to an automatic bending device for a copper foil soft bar, and belongs to the technical field of copper foil soft bar production and manufacturing. The automatic bending device comprises a workbench, a limiting block, a welding machine and a feeding assembly, the limiting block is connected to the workbench and used for limiting the length of the copper foil placed on the workbench. The welding machine is connected to the side face of the workbench, and a welding head of the welding machine abuts against the end, facing the limiting block, of the copper foil. The feeding assembly is used for guiding out and overlapping a plurality of coils of copper foils and then conveying the coils of copper foils to the workbench; the technical problem that the yield is low due to the fact that a copper foil flexible busbar production process in the prior art is firstly cut, welded and then bent can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of copper foil flexible busbar production and manufacturing, in particular to an automatic bending device for a copper foil flexible busbar. Background Art

[0002] Copper foil busbars have a variety of uses. They can efficiently transmit electricity and reduce energy loss in scenarios such as between battery packs and motors of new energy vehicles, inside charging piles, and in distribution cabinets. Due to their soft and bendable properties, they can be flexibly wired in limited spaces to optimize the internal structural layout of the equipment.

[0003] The existing patent application number is 202321376916.8, which discloses a copper-nickel composite soft copper busbar and battery pack. The manufacturing process includes the following steps: S1, a copper-nickel composite sheet with the size of the area to be welded is placed on the top and bottom layers; S2, 10-50 layers of copper foil with the same size are selected, and any two of them are spot welded together with the copper surface of the copper-nickel composite sheet; S3, 10-50 layers of copper foil with the same size are selected and stacked together, and the nickel surfaces of the spot welded copper-nickel composite sheets are placed on the top and bottom layers respectively; S4, through the polymer expansion S5. Punch and trim the two ends of the copper conductor to make bolt mounting holes, and trim the two ends of the copper conductor into the required shape. S6. Select an insulating layer with a diameter larger than the width of the copper conductor and the same length as the middle section of the copper conductor, put it on the middle section of the copper conductor and heat shrink or wrap it. S7. Place the soft copper busbar into the bending device and bend it into the required shape. S8. Check whether the soft copper busbar meets the requirements. If so, pack it and put it into storage.

[0004] The existing technology has the following problems:

[0005] First, cut multiple layers of copper foil and stack them, then weld the two end points and bend them. When the bending angle is too large, the length of the inner and outer layers of copper foil will need to be increased. Simply calculating the increase in length theoretically will lead to a high scrap rate in the trial stage. Moreover, when the ductility of the copper foil changes due to changes in raw materials and ambient temperature, the yield rate of the copper foil soft array will decrease. Utility Model Content

[0006] The utility model provides an automatic bending device for a copper foil flexible busbar, which can solve the technical problem in the prior art that the copper foil flexible busbar production process is first cut and welded before bending, resulting in a low yield.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0008] The present application provides an automatic bending device for a copper foil flexible busbar, which includes a workbench, a limit block, a welder and a feeding assembly. The workbench is used to place copper foil for bending; the limit block is connected to the workbench to limit the length of the copper foil placed on the workbench; the welder is connected to the side of the workbench, and the welding head of the welder abuts against one end of the copper foil facing the limit block; the feeding assembly guides out multiple rolls of copper foil, overlaps them, and then transports them to the workbench.

[0009] Through the above technical solution, a feeding assembly is used to stack multiple pieces of copper foil and feed them into the workbench. The insertion length of the copper foil is limited by the limit block, and a welding machine is used to weld one end point. Then, the copper foil is bent. This ensures that the feeding assembly will automatically release the amount according to the different bending amounts of the inner and outer copper foils during bending, avoiding the high scrap rate in the trial stage caused by simply theoretically calculating the release value. At the same time, it avoids the change in ductility of the copper foil due to changes in raw materials and ambient temperature, thereby improving the yield rate of the copper foil soft row.

[0010] In the present invention, the above-mentioned automatic bending device for copper foil flexible strips also includes a lower die, a gantry and a bending knife. The lower die is detachably connected to the workbench and abuts against the bottom of the copper foil; the gantry is connected to the side of the workbench facing the feeding assembly; the bending knife is connected to the gantry for lifting and lowering, and the bending knife and the lower die are pressed together to bend the copper foil.

[0011] Through the above technical solution, a detachable lower die and a lifting-connected bending knife are adopted, and different bending requirements can be met by replacing different lower dies, thereby improving the adaptability of the device.

[0012] In the present invention, the above-mentioned copper foil flexible strip automatic bending device also includes a buffer roller, which is connected to the side of the bending knife facing the feeding assembly, and the lowest point of the buffer roller is lower than the lowest point of the bending knife.

[0013] Through the above technical solution, a buffer roller is used. When the bending knife presses down, the buffer roller contacts the copper foil first, which can increase the bending angle of the non-bending area of the copper foil, avoid indentations, and improve the surface quality of the product.

[0014] In the present invention, the feeding assembly further comprises a material rack, the material rack is connected to a plurality of material rolls, the material rolls are wound with copper foil, and the copper foils released from the plurality of material rolls are overlapped with each other.

[0015] Through the above technical solution, multiple material rolls are overlapped during the feeding stage, which avoids the problem of unadjustable copper foil release caused by pre-cutting and further improves the product yield.

[0016] In the present invention, the feeding assembly further comprises an extrusion roller group connected between the material rack and the workbench. The extrusion roller group comprises a plurality of damping rollers, which respectively abut against the upper and lower sides of the stacked copper foil.

[0017] Through the above technical solution, the use of extrusion rollers and damping rollers can avoid excessive release of copper foil during bending, further improving the product yield.

[0018] In the present invention, the welding machine has an ultrasonic welding head.

[0019] Through the above technical solution, an ultrasonic welding head is adopted, and deformation caused by metal thermal stress can be avoided through a non-contact processing method, thereby improving the dimensional accuracy of products in the welding-before-bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 An axonometric diagram of an automatic bending device for a copper foil flexible busbar provided in an embodiment of the present utility model;

[0022] Figure 2 A front view of an automatic bending device for a copper foil flexible busbar provided in an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 A partial schematic diagram of the cross-sectional view at AA in the middle;

[0024] Figure 4 An exploded view of an automatic bending device for a copper foil flexible bus without a material roll provided in an embodiment of the present invention.

[0025] Icons: 1-workbench; 101-base; 102-lower die; 103-limit block; 2-welding machine; 3-gantry; 301-telescopic hydraulic cylinder; 302-bending knife; 303-buffer roller; 4-feeding assembly; 401-material rack; 402-squeezing roller group; 5-material roll. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installation," "connection," and "connection" should be understood in a broad sense. For example, they can refer to welding, bolting, or riveting; fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] Example:

[0031] Please refer to Figures 1 to 4 , Figures 1 to 4 An embodiment of the present application is shown.

[0032] This embodiment provides a copper foil flexible bus automatic bending device, such as Figure 1 As shown, it includes a workbench 1, a limit block 103, a welder 2 and a feeding assembly 4. The workbench 1 is used to place copper foil for bending; the limit block 103 is detachably connected to the workbench 1 through a T-slot and screws, and is used to limit the length of the copper foil placed on the workbench 1; the welder 2 is connected to the side of the workbench 1, and the welding head of the welder 2 abuts against one end of the copper foil facing the limit block 103; the feeding assembly 4 guides out multiple rolls of copper foil, overlaps them, and then transports them to the workbench 1.

[0033] When using, such as Figure 3 As shown, copper foil is first drawn out from multiple rolls 5, overlapped with each other, and the ends are abutted against the limit block 103. Then the welding head of the welding machine 2 welds the ends of the copper foil and keeps crimping. After welding is completed, the bending operation is performed. At this time, the inner and outer layers of copper foil will have different degrees of bending, and the required bending amount will be compensated by the roll 5.

[0034] Through the above technical solution, the feeding component 4 is used to stack multiple pieces of copper foil and then feed them into the workbench 1, the insertion length of the copper foil is limited according to the limit block 103, and the welding machine 2 is used to weld one end point, and then the bending is performed. This ensures that during the bending, the feeding component 4 will automatically release the amount according to the different bending amounts of the inner and outer copper foils, avoiding the high scrap rate in the trial stage caused by the simple theoretical calculation of the release value, and at the same time avoiding the change in ductility of the copper foil due to changes in raw materials and ambient temperature, thereby improving the yield rate of the copper foil soft row.

[0035] As a preferred embodiment, the above-mentioned copper foil soft row automatic bending device also includes a lower mold 102, a gantry 3 and a bending knife 302. The lower mold 102 is detachably connected to the workbench 1 by screws and abuts against the bottom of the copper foil; the gantry 3 is connected to the side of the workbench 1 facing the feeding assembly 4; the bending knife 302 is connected to the gantry 3 by a telescopic hydraulic cylinder 301 for lifting and lowering, and the bending knife 302 is pressed together with the lower mold 102 to bend the copper foil.

[0036] During use, the corresponding lower die 102 and bending knife 302 are replaced according to different product bending requirements.

[0037] Through the above technical solution, using a detachable lower die 102 and a lifting-connected bending knife 302, different bending requirements can be met by replacing different lower dies 102, thereby improving the adaptability of the device.

[0038] As a better implementation method, Figures 2 to 4 As shown, the above-mentioned copper foil flexible strip automatic bending device also includes a buffer roller 303, which is connected to the side of the bending knife 302 facing the feeding assembly 4, and the lowest point of the buffer roller 303 is lower than the lowest point of the bending knife 302.

[0039] When in use, the buffer roller 303 is adjusted to be lower than the bending knife 302. When the bending knife 302 is pressed down, the buffer roller 303 contacts the copper foil first, so that the copper foil is located below the bending knife 302 and the bending angle is always greater than 90 degrees.

[0040] Through the above technical solution, the buffer roller 303 is used. When the bending knife 302 is pressed down, the buffer roller 303 first contacts the copper foil, which can increase the bending angle of the non-bending area of the copper foil, avoid indentations, and improve the surface quality of the product.

[0041] As a better implementation method, Figure 3 As shown, the feeding assembly 4 further includes a material rack 401 , and the material rack 401 is connected to a plurality of material rolls 5 , the material rolls 5 are wound with copper foil, and the copper foils released from the plurality of material rolls 5 overlap each other.

[0042] Through the above technical solution, multiple material rolls 5 are stacked during the feeding stage, which avoids the problem of unadjustable copper foil release caused by pre-cutting, and further improves the product yield.

[0043] As a better implementation method, Figure 3 As shown, the feeding assembly 4 further includes an extrusion roller set 402, which is connected between the material rack 401 and the workbench 1. The extrusion roller set 402 has a plurality of damping rollers, which respectively abut against the upper and lower sides of the laminated copper foil.

[0044] Through the above technical solution, the squeezing roller group 402 and the damping roller are used to avoid excessive release of copper foil during bending, thereby further improving the product yield.

[0045] As a preferred embodiment, the welding machine 2 has an ultrasonic welding head.

[0046] Through the above technical solution, an ultrasonic welding head is adopted, and deformation caused by metal thermal stress can be avoided through a non-contact processing method, thereby improving the dimensional accuracy of products in the welding-before-bending process.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A copper foil flexible bus automatic bending device, characterized in that: include: A workbench (1) for placing copper foil for bending; A limit block (103), connected to the workbench (1), for limiting the length of the copper foil placed on the workbench (1); A welding machine (2) is connected to a side surface of the workbench (1), and a welding head of the welding machine (2) abuts against an end of the copper foil facing the limit block (103); The feeding assembly (4) guides out and stacks the multiple rolls of copper foil and then feeds them onto the workbench (1).

2. The automatic bending device for copper foil flexible busbar according to claim 1, characterized in that: Also includes: A lower mold (102) is detachably connected to the workbench (1) and abuts against the bottom of the copper foil; A gantry (3) connected to a side of the workbench (1) facing the feeding assembly (4); A bending knife (302) is connected to the gantry (3) in a lifting manner, and the bending knife (302) is pressed together with the lower die (102) to bend the copper foil.

3. The automatic bending device for copper foil flexible busbar according to claim 2, characterized in that: Also includes: A buffer roller (303) is connected to the side of the bending knife (302) facing the feeding assembly (4), and the lowest point of the buffer roller (303) is lower than the lowest point of the bending knife (302).

4. The automatic bending device for copper foil flexible busbar according to claim 3, characterized in that: The feeding assembly (4) further comprises: A material rack (401) is connected to a plurality of material rolls (5), wherein the material rolls (5) are wound with copper foil, and the copper foils released from the plurality of material rolls (5) are overlapped with each other.

5. The automatic bending device for copper foil flexible busbar according to claim 4, characterized in that: The feeding assembly (4) further comprises: The squeezing roller group (402) is connected between the material rack (401) and the workbench (1). The squeezing roller group (402) has a plurality of damping rollers, and the plurality of damping rollers are respectively in contact with the upper and lower parts of the laminated copper foil.

6. The automatic bending device for copper foil flexible busbar according to any one of claims 1 to 5, characterized in that: The welding machine (2) has an ultrasonic welding head.

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