Multi-layer copper current collector welding equipment

Abstract

The utility model discloses a multilayer copper current collector welding device, which relates to the technical field of current collector welding and comprises a device body, a platform is mounted above the device body, four track grooves are circumferentially distributed on the upper portion of the platform in an array manner, and the inner walls of two sides of each track groove are fixedly connected with wire rods. And a sliding block is slidably connected into the rail groove. The multi-layer copper current collector welding equipment comprises a platform, a plurality of sliding blocks are arranged on the bottom of the platform, wire grooves are formed in the two sides of each sliding block, the wire grooves are slidably connected with wire rods, a first screw rod is rotationally connected to the axis of the bottom of the platform, the outer side of the first screw rod is sleeved with a first threaded ring in a threaded mode, and a connecting rod is rotationally connected between the outer side of the first threaded ring and each sliding block. According to the multi-layer copper current collector welding device, the rotatable first threaded rod is arranged, so that the four clamping plates can be adjusted to be matched together to clamp and position welding materials, the device is easy to operate and convenient to use, and therefore the use convenience of the multi-layer copper current collector welding device can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of current collector welding, specifically a multilayer copper current collector welding equipment. BACKGROUND

[0002] The current collector, as its name implies, refers to a structure or part that collects current. In lithium-ion batteries, it mainly refers to metal foils such as copper foil and aluminum foil. It also refers to the tab. With the sharp rise in copper prices, lithium battery companies have been greatly impacted. Major companies are looking for alternatives to traditional copper foil, so composite copper foil has entered the public eye. Composite copper foil is lighter and thinner than traditional copper foil because it has only 1µm of metal copper layer on both sides. Therefore, the cost is lower than that of traditional copper foil, and the dependence on copper resources is reduced. Because the polymer layer is not conductive, composite copper foil needs to be converted and welded before use, which means that a layer of traditional copper foil is connected to the metal copper layer on both sides of the composite copper foil, allowing the current to pass through the copper foil.

[0003] After extensive searching, we found that Chinese utility model patent column: CN219746764U discloses an electrode and current collector welding positioning alignment device, which includes a fixed platform, a welding groove is arranged in the middle of one end of the fixed platform, an electrode clamp for clamping and positioning the electrode in the first direction is arranged on one side of the welding groove, and a current collector clamp for clamping and positioning the current collector is arranged on the other side of the welding groove opposite to the first side. The current collector clamp includes a first positioning member arranged parallel to the first direction, and the first positioning member is slidingly arranged on the fixed platform in the second direction perpendicular to the first direction. One side of the first positioning member is provided with a second positioning member parallel to the second direction, and the second positioning member is slidingly arranged in the first direction.

[0004] In the above scheme, although there are many benefits, there are also the following disadvantages: the device clamps and positions the material by setting the first, second, and third positioning members. However, this structure is simple to operate and troublesome to use, which reduces the convenience of using the multilayer copper current collector welding equipment. SUMMARY

[0005] The utility model aims at providing a multilayer copper current collector welding equipment to solve the problem of troublesome use of the current multilayer copper current collector welding equipment in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of multilayer copper current collector welding equipment, including device ontology, platform is installed above the device ontology, four track grooves of circumferential array distribution are provided in the platform upper portion, wire rod is fixedly connected on the both sides inner wall of track groove, slidingly connected with slider in track groove. The both sides of the slider are provided with wire slot, and the wire slot is slidably connected with the wire rod, a first screw rod is rotatably connected at the shaft center of the platform bottom, a first threaded ring is threadedly connected to the outside of the first screw rod, a connecting rod is rotatably connected between the outside of the first threaded ring and each slider, and two first clamps and two second clamps are respectively arranged on the upper portion of the four sliders.

[0007] Preferably, the first clamp is slidably connected to the upper portion of the corresponding slider, a convex cavity is formed in one side of the slider, a convex rod is slidably connected in the convex cavity, the convex rod is fixedly connected to the bottom of the first clamp, a second screw rod is fixedly connected to the opposite side of the two first clamps, a second threaded ring is threadedly connected to the outside of the second screw rod, an installation plate is slidably connected to the outside of the second screw rod, the installation plate is fixedly connected to the upper portion of the slider, and the second threaded ring is rotatably connected to one side of the installation plate.

[0008] Preferably, a linkage rod is rotatably connected to the inner wall of the track groove, the vertical cross-section of the linkage rod is a hexagonal structure, a through hole is formed in one side of the slider, the linkage rod is located in the through hole cavity, and the outer wall of the linkage rod and the inner wall of the through hole do not contact each other, the linkage rod is parallel to the second screw rod, a sliding sleeve ring is slidably connected to the outside of the linkage rod, a through hexagonal cavity is formed in one side of the sliding sleeve ring, the sliding sleeve ring is rotatably connected to one side of the slider, a belt wheel is fixedly connected to the outside of the second threaded ring and the sliding sleeve ring, and a conveyor belt is drivingly connected between the two belt wheels.

[0009] Preferably, a controller is installed on the upper portion of the device ontology, a servo motor is installed on one side of the upper portion of the device ontology and the platform, the movable end of the two servo motors is fixedly connected to one end of the second screw rod and the linkage rod respectively, the servo motor is electrically connected to the controller, and the controller is electrically connected to the power supply.

[0010] Preferably, a composite copper current collector is arranged on the upper portion of the platform, the first clamp and the second clamp are respectively located on the outer wall of the composite copper current collector, and the composite copper current collector is a PET composite copper.

[0011] Preferably, a metal copper layer with a thickness of 1 µm is deposited on the front and back surfaces of the composite copper current collector, and the thickness of the composite copper current collector is 6.5 µm.

[0012] Preferably, the metal layer on both sides of the composite copper current collector is welded with a layer of traditional copper foil, which can be 5 / 6µm.

[0013] Preferably, the outer surface of the overlapping welding position of the traditional copper foil and the composite copper current collector is pasted with a layer of tab insulation tape.

[0014] Preferably, the tab insulation tape is a yellow tab tape.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1、The first threaded rod can be rotated to adjust the four clamping plates to clamp and position the welding material together, so that the device is simple to operate and convenient to use, thereby effectively improving the convenience of the multilayer copper current collector welding equipment.

[0017] 2、The linkage rod and the second screw rod are provided to adjust the position of each clamping plate when the width and length of the welding material are different, so that each clamping plate can clamp the welding material, thereby improving the stability of the clamping and positioning of the welding material, and the device is simple to operate and convenient to use, thereby effectively improving the applicability of the multilayer copper current collector welding equipment.

[0018] 3、The tab insulation tape is used to protect the traditional copper foil and the composite copper foil during welding to avoid welding through and reduce the risk of metal layer falling off due to corrosion, and can also reduce the spatter of metal chips during welding, and can prevent electrolyte from entering the welding hole in the battery, thereby further protecting the composite copper current collector. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic view of the whole multilayer copper current collector welding equipment of the utility model;

[0020] Figure 2 It is a three-dimensional schematic view of the platform of the multilayer copper current collector welding equipment of the utility model;

[0021] Figure 3 It is a three-dimensional schematic view of the cooperation of the first clamping plate, the first screw rod and the linkage rod of the multilayer copper current collector welding equipment of the utility model;

[0022] Figure 4 It is a three-dimensional schematic view of the cooperation of the first clamping plate, the first screw rod and the linkage rod of the multilayer copper current collector welding equipment of the utility model; Figure 3

[0023] Figure 5 It is a three-dimensional schematic view of the cooperation of the first clamping plate, the first screw rod and the linkage rod of the multilayer copper current collector welding equipment of the utility model; ​

[0024] The following are the labels in the diagram: 1. Device body; 2. Composite copper current collector; 3. Electrode insulating tape; 4. Traditional copper foil; 5. First screw; 6. First threaded ring; 7. Connecting rod; 8. First clamping plate; 9. Second clamping plate; 10. Second threaded ring; 11. Mounting plate; 12. Linkage rod; 13. Sliding collar; 14. Conveyor belt; 15. Controller; 16. Servo motor; 17. Second screw; 18. Platform; 19. Track groove; 20. Slider. Detailed Implementation

[0025] 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.

[0026] Example: Figure 1 - Figure 5 As shown, this utility model provides a technical solution for a multi-layer copper current collector welding device, including a device body 1, a platform 18 mounted on the top of the device body 1, four circularly arranged track grooves 19 on the upper part of the platform 18, wire rods fixedly connected to the inner walls on both sides of the track grooves 19, and sliders 20 slidably connected inside the track grooves 19. Wire grooves are provided on both sides of the sliders 20, and the wire grooves are slidably connected to the wire rods. A first screw 5 is rotatably connected to the axis at the bottom of the platform 18, and a first threaded ring 6 is threaded onto the outer side of the first screw 5. A connecting rod 7 is rotatably connected between the outer side of the first threaded ring 6 and each slider 20. Two first clamping plates 8 and two second clamping plates 9 are symmetrically arranged on the upper part of the four sliders 20.

[0027] The material is placed on the platform 18. By rotating the first screw 5, the first threaded ring 6 is used to drive each slider 20 to slide in the corresponding track groove 19, and the first clamping plate 8 and the second clamping plate 9 are in contact to clamp the material, which facilitates the positioning and welding of the material.

[0028] like Figure 3 and Figure 4 As shown, the first clamping plate 8 is slidably connected to the upper part of the corresponding slider 20. A convex cavity is opened on one side of the slider 20. A convex rod is slidably connected in the convex cavity. The convex rod is fixedly connected to the bottom of the first clamping plate 8. A second screw 17 is fixedly connected to the opposite side of the two first clamping plates 8. A second threaded ring 10 is threaded on the outer side of the second screw 17. A mounting plate 11 is slidably fitted on the outer side of the second screw 17. The mounting plate 11 is fixedly connected to the upper part of the slider 20. The second threaded ring 10 is rotatably connected to one side of the mounting plate 11.

[0029] When the width and length of the material are different, the second threaded ring 10 is rotated, and the first clamping plate 8 is driven by the second threaded ring 10 to slide on the sliding block 20 through the second screw 17, so that the first clamping plate 8 and the second clamping plate 9 can contact the material and position and clamp the material.

[0030] As shown in Figure 3 and Figure 4 , the linkage rod 12 is rotatably connected to the inner wall of the track groove 19, the vertical section of the linkage rod 12 is a hexagonal structure, one side of the sliding block 20 is provided with a through hole, the above-mentioned linkage rod 12 is located in the through hole cavity, and the outer wall of the linkage rod 12 and the inner wall of the through hole are not in contact with each other, the linkage rod 12 is parallel to the second screw 17, the outer side of the linkage rod 12 is slidably sleeved with a sliding sleeve ring 13, one side of the sliding sleeve ring 13 is provided with a through hexagonal cavity, the sliding sleeve ring 13 is rotatably connected to one side of the sliding block 20, the outer sides of the second threaded ring 10 and the sliding sleeve ring 13 are fixedly sleeved with a belt wheel, and the two belt wheels are transmissionally connected with a conveyor belt 14;

[0031] By rotating the linkage rod 12, the linkage rod 12 drives the two sliding sleeve rings 13 to rotate together, and the two sliding sleeve rings 13 drive the respective second threaded rings 10 to rotate by using the corresponding conveyor belt 14, so that the two first clamping plates 8 are close to or away from each other.

[0032] As shown in Figure 1 and Figure 2 , the controller 15 is installed on the upper part of the device body 1, and the upper part of the device body 1 and one side of the platform 18 are both provided with a servo motor 16, the movable ends of the two servo motors 16 are fixedly connected with the second screw 17 and one end of the linkage rod 12 respectively, the servo motor 16 is electrically connected with the controller 15, and the controller 15 is electrically connected with a power supply;

[0033] The controller 15 is electrically connected with the power supply, and the controller 15 is used to control the start-stop and forward-reverse rotation of the servo motor 16.

[0034] As shown in Figure 1 , the platform 18 is provided with a composite copper current collector 2, the first clamping plate 8 and the second clamping plate 9 are both located on the outer wall of the composite copper current collector 2, and the composite copper current collector 2 is a PET composite copper.

[0035] The high-molecular base film used by the composite copper current collector 2 is PP / PET, the thickness of the base film is 3-6µm, and a metal copper layer with a thickness of 1µm is deposited on each of the front and back surfaces of the base film.

[0036] As shown in Figure 5 , a metal copper layer with a thickness of 1µm is deposited on each of the front and back surfaces of the composite copper current collector 2, and the thickness of the composite copper current collector 2 is 6.5µm.

[0037] AsFigure 1 - Figure 5 As shown, a layer of conventional copper foil 4 is welded to both sides of the metal layer of the composite copper current collector 2. The conventional copper foil 4 can be 5 / 6µm.

[0038] like Figure 5 As shown, a layer of electrode insulating tape 3 is applied to the outer surface of the overlap welding point between the conventional copper foil 4 and the composite copper current collector 2. This operation is performed on both the upper and lower layers of conventional copper foil 4.

[0039] The insulating tape 3 on the tabs can further prevent electrolyte from wetting the weld joints in the battery, and strengthen the protection of the composite copper current collector 2.

[0040] After the electrode insulating tape 3 is applied to the surface of the traditional copper foil 4, it is then covered on the metal layer surfaces on both sides of the composite copper current collector 2 and welded.

[0041] The electrode insulating tape 3 can act as a buffer when the welding head is pressed down, so that the welding head / base does not directly impact the traditional copper foil 4 and the composite copper current collector 2, avoiding the generation of perforation. At the same time, it can also prevent metal chips generated during the welding process from splashing and contaminating the electrode.

[0042] like Figure 5 As shown, the electrode insulating tape 3 is a yellow electrode tape;

[0043] After welding, the light transmittance of the welded area is reduced by 50% compared to when no adhesive is applied.

[0044] To prevent the composite copper foil from being soldered through to the traditional copper foil 4 during the transition soldering process, while ensuring good welding quality of the composite copper foil, it is necessary to avoid solder perforation, so that it has lower resistance and can further prevent the metal layer from falling off due to prolonged immersion in electrolyte.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multilayer copper current collector welding apparatus comprising a device body (1), characterized in that: The device body (1) is provided with a platform (18) above it, and four track grooves (19) are arranged in a circumferential array on the upper part of the platform (18). The track grooves (19) are slidably connected with sliders (20), and the first screw rod (5) is rotatably connected with the shaft center of the bottom of the platform (18). The outer side of the first screw rod (5) is threadedly sleeved with a first threaded ring (6), and the outer side of the first threaded ring (6) is rotatably connected with each slider (20) through a connecting rod (7). The upper part of each slider (20) is provided with two symmetrically arranged first clamping plates (8) and two symmetrically arranged second clamping plates (9).

2. A multi-layered copper current collector welding apparatus according to claim 1, characterized by: The first clamping plate (8) is slidably connected to the upper part of the corresponding slider (20), and the second screw rod (17) is fixedly connected to the opposite side of each first clamping plate (8). The outer side of the second screw rod (17) is threadedly sleeved with a second threaded ring (10), and the outer side of the second screw rod (17) is slidably sleeved with a mounting plate (11). The mounting plate (11) is fixedly connected to the upper part of the slider (20), and the second threaded ring (10) is rotatably connected to one side of the mounting plate (11).

3. A multi-layer copper current collector welding apparatus according to claim 2, characterized by: The inner wall of the track groove (19) is rotatably connected with a linkage rod (12), and the linkage rod (12) is parallel to the second screw rod (17). The outer side of the linkage rod (12) is slidably sleeved with a sliding sleeve ring (13), and the sliding sleeve ring (13) is rotatably connected to one side of the slider (20). The outer sides of the second threaded ring (10) and the sliding sleeve ring (13) are fixedly sleeved with a belt wheel, and the belt wheel is drivingly connected with a conveyor belt (14) between the two belt wheels.

4. A multi-layer copper current collector welding apparatus according to claim 3, characterized by: The controller (15) is installed on the upper part of the device body (1), and the servo motor (16) is installed on one side of the upper part of the device body (1) and the platform (18). The movable ends of the two servo motors (16) are fixedly connected with one end of the second screw rod (17) and the linkage rod (12), respectively.

5. A multi-layer copper current collector welding apparatus according to claim 4, characterized by: The composite copper current collector (2) is arranged on the upper part of the platform (18). The composite copper current collector (2), the first clamping plate (8), and the second clamping plate (9) are respectively arranged on the outer walls of the composite copper current collector (2). The composite copper current collector (2) is a PET composite copper.

6. A multi-layer copper current collector welding apparatus according to claim 5, wherein: The composite copper current collector (2) is provided with a metal copper layer with a thickness of 1µm on each of the front and back surfaces, and the thickness of the composite copper current collector (2) is 6.5µm.

7. A multi-layer copper current collector welding apparatus according to claim 6, characterized by: The metal layer on both sides of the composite copper current collector (2) is welded with a layer of traditional copper foil (4), and the traditional copper foil (4) can be 5 / 6µm.

8. A multi-layer copper current collector welding apparatus according to claim 7, characterized by: The outer surface of the overlapping welding position of the traditional copper foil (4) and the composite copper current collector (2) is pasted with a layer of tab insulating tape (3).

9. A multi-layer copper current collector welding apparatus according to claim 8, characterized by: The tab insulating tape (3) is a yellow tab tape.

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