Device for improving cracked edge of battery foil

Abstract

The utility model relates to the technical field of battery foil production, in particular to a device for improving a cracked edge of a battery foil, which comprises a mouthpiece fan, a shunting device for guiding is arranged on the upper surface of the mouthpiece fan, and edge lugs are arranged at two ends of the mouthpiece fan. The opening grooves used for reducing stress are formed in the side faces, abutting against the mouthpiece fan, of the edge lugs, the opening grooves comprise the transverse grooves and the vertical grooves, the vertical grooves are formed in the length direction of the mouthpiece fan, the number and density of cracked edges are obviously reduced, the production efficiency and the product quality are improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery foil production, and particularly relates to a device for improving the cracked edge of a battery foil. Background Art

[0002] The process cracked edge of the cast-rolled finished product coil has always been a technical bottleneck that plagues domestic cast-rolling enterprises. Especially in the cast-rolling production process of 1060 / 1070 alloy battery foil blanks, due to the characteristics of alloy components, the relatively fast speed of the cast-rolled strip, the relatively high static pressure at the edge of the casting nozzle, and the relatively long residence time of the molten aluminum in the chute and filter plate, the refinement timeliness of the titanium wire is affected, and the effective titanium intercepted and deposited by the filter plate increases. To a certain extent, it affects the grain size and edge quality control, resulting in dense transverse cracked edges and edge explosion defects at the edges of the cast-rolled plates. The depth of the cracked edge is 8-10 mm. The existence of such defects causes the edges of the cast-rolled strip to be continuously subjected to tensile and compressive stresses in the subsequent production processes, and the cracked edges continue to expand. Especially, the original larger cracked edges expand rapidly during cold rolling and will cause the strip to break when reaching a certain degree, resulting in the interruption of production. In addition, for too large cracked edges, they cannot be completely cut off in the trimming pass. This not only affects the subsequent processing and user use, but also increases the cost. Therefore, it is an urgent problem for production technicians to solve the problem of too large cracked edges and avoid the generation of cracked edges during the cast-rolling production process. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiency that the generation of long cracked edges in the production process of battery foils in the prior art affects the product quality, and to provide a device for improving the cracked edge of a battery foil.

[0004] In order to achieve the above purpose, the embodiment of the utility model specifically adopts the following technical scheme: A device for improving the cracked edge of a battery foil, including a nozzle fan. One end of the nozzle fan is provided with a baffle for controlling the feeding amount. A diversion device for guiding is arranged inside the nozzle fan. Edge ears are arranged at both ends of the nozzle fan. An opening groove for reducing stress is arranged on the side surface of the edge ear in contact with the nozzle fan. The opening groove includes a horizontal groove and a vertical groove. The horizontal groove is arranged along the length direction of the nozzle fan.

[0005] Further, the bottom of the horizontal groove is communicated with the middle position of the vertical groove, and the depth change of the bottom of the horizontal groove extending towards the vertical groove increases linearly.

[0006] Further, the bottom surface of the horizontal groove is flat and the side surface is arc-shaped.

[0007] Further, the cross-section of the vertical groove is oval. The vertical groove is arranged on the outside of the nozzle fan and is arranged along the vertical direction of the nozzle fan.

[0008] Further, the flow splitting device is a plurality of flow splitting blocks arranged inside the nozzle fan, and the top of the flow splitting block is triangular and the bottom is rectangular.

[0009] Further, a stop block is provided on the surface of the nozzle fan in contact with the side ear, the cross-section of the stop block is a right triangle, and the base angle of the stop block faces the flow splitting block.

[0010] The beneficial effects of the embodiments of the present utility model are as follows: On the side surface where the side ear is in contact with the nozzle fan, a unique opening groove is provided. The opening groove includes a horizontal groove and a vertical groove. The bottom of the horizontal groove is connected to the middle position of the vertical groove, and the end surface of the horizontal groove inclined towards the nozzle fan side to reduce the direct impact of the molten aluminum during the flow process, further reducing the risk of edge cracking. When using this structure, the molten aluminum will form a collecting effect at the vertical groove, and the molten aluminum at the edge of the nozzle fan will flow along the horizontal groove. When the molten aluminum reaches the end of the horizontal groove, due to the inclined bottom surface at the end, the edge static pressure and friction are reduced, effectively dispersing and buffering the impact force generated by the molten aluminum during the flow process, maintaining the smoothness of the flow, significantly improving the edge cracking problem during the casting and rolling process of the battery foil. The edge cracking depth is significantly reduced from the original 8 - 10 mm to within 3 mm, and the number and density of edge cracks are also significantly reduced, improving the production efficiency and product quality, and reducing the production cost. Description of the Drawings

[0011] Figure 1 is the overall structural schematic diagram of the present utility model;

[0012] Figure 2 is the internal structural schematic diagram of the present utility model;

[0013] Figure 3 is the enlarged structural schematic diagram at A of the present utility model;

[0014] In the figure: 1. Nozzle fan; 2. Side ear; 201. Horizontal groove; 202. Vertical groove; 3. Stop block; 4. Flow splitting block; 5. Baffle. Detailed Embodiments

[0015] The following describes the preferred embodiments of the present utility model with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0016] See Figures 1 to 3, an embodiment of the present utility model discloses a device for improving the cracked edge of battery foils, including a nozzle fan 1, the material of which is selected as alloy steel with high temperature resistance, corrosion resistance and certain strength to ensure stable operation in the high temperature environment of molten aluminum. A baffle 5 is arranged at one end of the nozzle fan 1, and a gap for feeding is left between the two baffles 5. During use, the molten aluminum enters from this gap. The nozzle fan 1 consists of two upper and lower plates, and the inner surface of the nozzle fan 1 is designed to be smooth and slightly inclined downward to facilitate the uniform flow of molten aluminum. A plurality of flow dividing blocks 4 are installed inside the nozzle fan 1. These flow dividing blocks 4 are shaped with a triangular top and a rectangular bottom to effectively disperse the flow of molten aluminum, reduce the flow rate, and reduce local pressure concentration. The gaps between the flow dividing blocks 4 are accurately arranged according to the production specifications to ensure that the molten aluminum can enter the casting and rolling area evenly and stably, thereby reducing the cracked edge phenomenon caused by uneven flow rate. To further enhance the flow dividing effect and prevent the overflow of molten aluminum, a stop block 3 is arranged on the surface where the nozzle fan 1 abuts against the side ear 2. The cross-section of the stop block 3 is a right triangle with the base angle facing the flow dividing block 4. In this way, it can effectively block the direct impact of molten aluminum on the side ear 2 and guide the molten aluminum to pass through the flow dividing block 4 more smoothly into the casting and rolling area.

[0017] At both ends of the nozzle fan 1, a side ear 2 structure is designed to enhance the overall strength and stability of the nozzle fan 1. At the outlet of the molten aluminum on the side where the side ear 2 abuts against the nozzle fan 1, a unique opening groove is opened. At the end of the opening groove near the molten aluminum outlet, the opening groove includes a horizontal groove 201 and a vertical groove 202. The bottom of the horizontal groove 201 is connected to the middle position of the vertical groove 202 to form a "T" - shaped structure, which helps to disperse and absorb the edge stress generated during the casting and rolling process. The cross - section of the vertical groove 202 is designed as an ellipse and is arranged along the length direction (i.e., the vertical direction) of the nozzle fan 1, and its depth is the same as the bottom depth of the horizontal groove 201 to ensure the maximization of the stress dispersion effect. The end face of the horizontal groove 201 is inclined towards the nozzle fan 1 side to reduce the direct impact of molten aluminum during the flow process and further reduce the risk of cracked edge. The end of the horizontal groove 201 is designed as a structure with a triangular bottom and a cylindrical shape. When using this structure, the molten aluminum at the edge of the nozzle fan 1 will flow along the horizontal groove 201. When the molten aluminum reaches the end of the horizontal groove 201, due to the inclined bottom surface at the end, the horizontal groove 201 will guide the molten aluminum inward, reducing the edge static pressure and friction force, effectively dispersing and buffering the impact force generated by the molten aluminum during the flow process, and maintaining the smoothness of the flow. The molten aluminum will form a collecting effect at the vertical groove 202 and form a liquid supplement effect on the molten aluminum at the vertical groove 202, improving the production effect.

[0018] After designing and implementing the device as described above, multiple casting and rolling tests were carried out. The results showed that the edge cracking problem during the casting and rolling process of battery foils was significantly improved. The depth of the edge crack was greatly reduced from the original 8 - 10 mm to within 3 mm, and the number and density of the edge cracks also decreased significantly. At the same time, due to the reduction of the edge cracks, the phenomenon of strip breakage in the subsequent cold rolling process was effectively controlled, improving the production efficiency and product quality. In addition, due to the reduction of unnecessary trimming losses, the production cost was also effectively controlled.

[0019] It should be noted that in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] The term "comprising" or any other similar term is intended to cover non - exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices.

[0022] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A device for improving the crack edge of battery foil, comprising a nozzle fan (1), one end of the nozzle fan (1) is provided with a baffle (5) for controlling the feed amount, characterized in that: A diversion device for guiding is arranged inside the spout fan (1), and side ears (2) are arranged at both ends of the spout fan (1). The side surfaces of the side ears (2) abutting against the spout fan (1) are provided with open grooves for reducing stress, and the open grooves include a transverse groove (201) and a vertical groove (202), and the transverse groove (201) is arranged along the length direction of the spout fan (1).

2. The device for improving cracked edges of battery foil according to claim 1, characterized in that: The bottom of the transverse groove (201) is connected to the middle position of the vertical groove (202), and the depth of the bottom of the transverse groove (201) extending in the direction of the vertical groove (202) increases linearly.

3. The device for improving cracked edges of battery foil according to claim 1, characterized in that: The bottom surface of the transverse groove (201) is flat and the side surface is arc-shaped.

4. The device for improving cracked edges of battery foil according to claim 1, characterized in that: The cross section of the vertical groove (202) is elliptical; the vertical groove (202) is arranged on the outside of the nozzle fan (1); and the vertical groove (202) is arranged along the vertical direction of the nozzle fan (1).

5. The device for improving cracked edges of battery foil according to claim 1, characterized in that: The diverter device is a plurality of diverter blocks (4) arranged inside the nozzle fan (1); the top of the diverter block (4) is triangular and the bottom is rectangular.

6. The device for improving cracked edges of battery foil according to claim 5, characterized in that: A stopper (3) is provided on the surface of the nozzle fan (1) abutting against the edge ear (2); the cross section of the stopper (3) is a right triangle, and the bottom angle of the stopper (3) faces the diverter block (4).

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