A kind of cut and pull tin-plated copper mesh for battery plate

Abstract

The utility model relates to battery polar plate material technical field discloses a kind of cut and pull tin-plated copper mesh for battery polar plate, including hemming area, the hemming area one end is provided with mesh wire, the inside of mesh wire is provided with rhombic slot, the mesh wire includes pure copper layer and tin-plated layer, the outside of pure copper layer is arranged in the inside of tin-plated layer, the pure copper layer uses pure copper strip with thickness of 0.08mm~0.12mm as matrix, the hole long diagonal line length of rhombic slot is 0.5mm~2.0mm, short diagonal line length is 0.3mm~1.5mm.In the utility model, select the T2 pure copper strip coil material with thickness of 0.1mm, cut out regular rhombic slot by precision mould, immediately stretch, form integrated cut and pull copper mesh, so that punch and cut stretch continuous forming can be achieved, process is simple and efficient, compared with braiding process energy consumption is lower, more environmental protection effect.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode material technology, and in particular to a tin-plated copper mesh for battery electrodes. Background Technology

[0002] In the field of battery electrode material technology, the electrode grid or current collector materials for lead-acid batteries, supercapacitors and other chemical batteries have long relied on traditional solutions. In the early days, gravity-cast lead-antimony alloys or pure lead were mostly used as core materials. As the requirements for battery performance have increased, the industry has gradually shifted to using copper mesh as electrode skeleton or current collector. Among them, traditional woven copper mesh was widely used due to its ease of processing.

[0003] However, traditional copper mesh weaving requires the interlacing of warp and weft threads to form the mesh. The weaving process itself is lengthy and complex, resulting in low production efficiency and high energy consumption. In addition, the interlacing of warp and weft threads during the weaving process and subsequent processing easily generate a lot of waste and pollutants, which is not in line with the current trend of green manufacturing. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a tin-plated copper mesh for battery plates, which aims to improve the problem that traditional woven copper mesh requires warp and weft threads to be interwoven, and the weaving process itself is lengthy and complicated.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A tin-plated copper mesh for battery plates includes a folded edge area, one end of which is provided with a mesh wire, the mesh wire having a diamond-shaped groove inside, the mesh wire including a pure copper layer and a tin-plated layer, the outer part of the pure copper layer being disposed inside the tin-plated layer.

[0007] Through the above technical solution: the folded edge area is reinforced by folding the wire mesh to prevent deformation or damage to the copper mesh due to edge stress during assembly, transportation, and battery charge-discharge cycles. It is also a welding area. The pure copper layer serves as the substrate, and diamond-shaped grooves are formed through precision punching and stretching. The surface of the pure copper layer is covered with a dense and continuous tin-plated layer. The diamond-shaped grooves ensure rapid ion migration during charge and discharge, improving the battery rate performance and cycle stability. The tin-plated layer covering the surface of the pure copper layer can isolate the copper material from direct contact with corrosive media such as electrolyte and moisture, thereby achieving the effect of avoiding oxidation of the copper substrate and significantly extending the service life of the copper mesh and battery plates.

[0008] Preferably, the pure copper layer uses a pure copper strip with a thickness of 0.08 mm to 0.12 mm as the substrate.

[0009] Preferably, the length of the long diagonal of the diamond-shaped groove is 0.5mm to 2.0mm, and the length of the short diagonal is 0.3mm to 1.5mm.

[0010] Preferably, the width of the mesh wire is 0.05mm to 0.15mm.

[0011] Preferably, the thickness of the tin plating layer is 1μm to 5μm.

[0012] Preferably, a reinforcing rod is fixedly connected to one end of the folded edge area.

[0013] Preferably, the folded edge area has a movable groove inside, which is located inside the reinforcing rod.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, T2 pure copper strip coil with a thickness of 0.1mm is selected, and regular diamond-shaped grooves are cut out by a precision mold. Then, it is stretched to form an integrated cut and stretched copper mesh, thereby achieving continuous forming by punching and stretching. The process is simple and efficient, and has lower energy consumption and is more environmentally friendly compared to weaving.

[0016] 2. In this utility model, the movable groove is continuously folded, so that the copper mesh can be divided into several pieces, so that the copper mesh can be separated without tools and cut along the movable groove, thereby improving the cutting accuracy. Attached Figure Description

[0017] Figure 1 This is a front three-dimensional structural diagram of a tin-plated copper mesh for battery plates proposed in this utility model.

[0018] Figure 2 This is a partial structural diagram of the pure copper layer of a tin-plated copper mesh for battery plates proposed in this utility model.

[0019] Figure 3 This is a side perspective view of a Cie-drawn tin-plated copper mesh for battery plates proposed in this utility model.

[0020] Figure 4 for Figure 3 Schematic diagram at point A in the middle.

[0021] Legend:

[0022] 1. Folded edge area; 2. Mesh wire; 3. Movable groove; 4. Reinforcing rod; 5. Diamond groove; 6. Pure copper layer; 7. Tin plating layer. Detailed Implementation

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

[0024] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a tin-plated copper mesh for battery plates, comprising a folded edge area 1, a mesh wire 2 at one end of the folded edge area 1, a diamond-shaped groove 5 inside the mesh wire 2, and the mesh wire 2 comprising a pure copper layer 6 and a tin-plated layer 7, with the outside of the pure copper layer 6 disposed inside the tin-plated layer 7.

[0025] Specifically, the folded edge area 1 serves as a reinforcement and also as a welding area. The pure copper layer 6 acts as the substrate, and through a precision punching and stretching integrated process, it forms an integrated mesh structure composed of evenly distributed diamond-shaped grooves 5. The surface of the pure copper layer 6 is covered with a dense and continuous tin-plated layer 7. The diamond-shaped grooves 5 ensure extremely high specific surface area and good permeability, which is conducive to the firm adhesion of active materials and electrolyte wetting. The tin-plated layer 7 can effectively protect the copper substrate without significantly increasing resistance. The integrated structure has no nodes with high resistance, thus achieving a more robust and durable structure.

[0026] Reference Figure 1 , Figure 2 and Figure 4 The pure copper layer 6 uses a pure copper strip with a thickness of 0.08mm to 0.12mm as the substrate; the long diagonal length of the diamond groove 5 is 0.5mm to 2.0mm, and the short diagonal length is 0.3mm to 1.5mm; the width of the mesh wire 2 is 0.05mm to 0.15mm; and the thickness of the tin plating layer 7 is 1μm to 5μm.

[0027] Specifically, the wire mesh 2 is a knotless, integrated structure made from a single copper strip through precision die punching and simultaneous stretching, eliminating the loosening problem of woven mesh. The connection between the wire mesh 2 is a complete metal solid, which makes it more durable and provides a smooth surface when coating active materials. The tin plating layer 7 effectively isolates the pure copper layer 6 from direct contact with air and electrolyte, which not only improves the oxidation resistance and electrolyte corrosion resistance of the wire mesh 2, but also ensures the long-term reliability of the battery, thus achieving a strong weld and low resistance. The tin plating layer 7 not only provides long-term protection for the pure copper layer 6, but also extends the battery life. The diamond groove 5 has a small hole shape and a suitable wire width, which not only prevents the active material from falling off during charging and discharging, but also reduces the falling off and improves the battery cycle life. The corrosion-resistant and easily solderable tin plating layer 7 is responsible for protection and connection. Its comprehensive performance exceeds that of a single-material woven mesh. The surface of the tin plating layer 7 is easier and more reliable to weld, thus reducing the risk of poor soldering.

[0028] Reference Figure 3 and Figure 4 One end of the folded edge area 1 is fixedly connected to a reinforcing rod 4; the interior of the folded edge area 1 is provided with a movable groove 3, which is located inside the reinforcing rod 4;

[0029] Specifically, the reinforcing rod 4 is used to improve the edge's resistance to deformation, and the movable grooves 3 are respectively opened on the upper and lower sides of the reinforcing rod 4 and the upper and lower sides of the folded edge area 1, so that the copper mesh can be cut more conveniently.

[0030] Working principle: When the copper mesh needs to be manufactured, a 0.1mm thick T2 pure copper strip coil is selected and fed into a special punching and stretching machine. The copper strip is continuously punched through a precision die to cut out regular diamond-shaped grooves 5. Then, under the traction of the die, it is stretched to expand the cut and stretch into a uniform diamond-shaped mesh with a long diagonal of about 2mm, a short diagonal of about 1mm, and a wire width of about 0.08mm, forming an integrated cut and stretched copper mesh. This achieves continuous forming by punching and stretching, which is simple and efficient. Compared with the weaving process, it has lower energy consumption and is more environmentally friendly.

[0031] When it is necessary to divide the copper mesh into several pieces, the folded edge area 1 on both sides of the movable groove 3 can be held and folded repeatedly to divide the copper mesh into several pieces, so that the copper mesh can be separated without tools. When using tools, the cutting can be carried out along the movable groove 3, thereby improving the cutting accuracy.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tin-plated copper mesh for battery plates, comprising a folded edge region (1), characterized in that: One end of the folded edge area (1) is provided with a mesh (2), and the mesh (2) has a diamond-shaped groove (5) inside. The mesh (2) includes a pure copper layer (6) and a tin-plated layer (7), and the outside of the pure copper layer (6) is disposed inside the tin-plated layer (7).

2. The tin-plated copper mesh for battery plates according to claim 1, characterized in that: The pure copper layer (6) uses a pure copper strip with a thickness of 0.08 mm to 0.12 mm as the substrate.

3. The tin-plated copper mesh for battery plates according to claim 1, characterized in that: The length of the long diagonal of the diamond groove (5) is 0.5mm to 2.0mm, and the length of the short diagonal is 0.3mm to 1.5mm.

4. The tin-plated copper mesh for battery plates according to claim 1, characterized in that: The width of the mesh wire (2) is 0.05mm to 0.15mm.

5. A tin-plated copper mesh for battery plates according to claim 1, characterized in that: The thickness of the tin plating layer (7) is 1μm to 5μm.

6. The tin-plated copper mesh for battery plates according to claim 1, characterized in that: A reinforcing rod (4) is fixedly connected to one end of the folded edge area (1).

7. A tin-plated copper mesh for battery plates according to claim 6, characterized in that: The folded edge area (1) has an open groove (3) inside, which is located inside the reinforcing rod (4).

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