Aluminum shell machining system and aluminum shell

Abstract

The utility model discloses an aluminum shell processing system, including shell processing unit, base plate processing unit and assembling unit, shell processing unit includes first unreeling device, high frequency pipe device and rotary cutting device, base plate processing unit includes second unreeling device and punch forming device, assembling unit includes spin welding device. The shell machining unit, the bottom plate machining unit and the assembling unit each comprise a surface treatment device, and each surface treatment device comprises a visual inspection station and a polishing station. The aluminum shell is formed by carrying out rotary laser welding on a square shell and a stamping bottom plate, wherein the square shell and the stamping bottom plate are welded through rolling, bending and welding of a universal high-frequency pipe making machine. And the wall thickness and the bottom thickness of the aluminum shell are designed only according to the strength required by the aluminum shell, so that the material utilization rate is improved. The problems that in the existing aluminum shell production process, the raw material utilization rate is low, and cost is high are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery casing processing technology, specifically to an aluminum casing processing system and an aluminum casing. Background Technology

[0002] Most existing square aluminum-cased battery casings are manufactured using a stretching process, which involves complex mold structures, high mold costs, low efficiency, and a high rate of appearance defects. For example, CN202352735U discloses a lithium battery aluminum alloy casing, which is a stretch-formed casing structure. The raw material is first stamped into an elliptical shape and then stretched. This results in low raw material utilization, and each mold can only produce one product. It also has poor versatility for different square aluminum casing heights, and the stretched aluminum casing has a thicker bottom, which increases material costs accordingly. Utility Model Content

[0003] The purpose of this utility model is to provide an aluminum shell structure to solve the problems of low raw material utilization and high cost in the existing aluminum shell production process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an aluminum shell, comprising a square outer shell and a base plate, wherein the square outer shell and the base plate are welded by a rotary welding device. The square outer shell is processed by a first unwinding device, a high-frequency tube forming device, and a rotary cutting device, and the base plate is processed by a second unwinding device and a stamping forming device. The aluminum shell is assembled by welding using a rotary welding device.

[0005] Preferably, the base plate is provided with a positioning step on its periphery. The positioning step is stamped by a stamping forming device. The width of the positioning step is 0.3mm-0.8mm. The positioning step is welded to the square shell.

[0006] Preferably, the thickness of the square outer shell is 0.3mm-0.8mm.

[0007] Preferably, the thickness of the base plate is 1.0-1.5 mm.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] The aluminum shell of this invention is formed by rotary laser welding of a square outer shell, which is formed by roll bending and welding using a general high-frequency tube forming machine, and a stamping base plate. The wall and base thickness of the aluminum shell are designed only based on the required strength, eliminating the need to thicken the raw material due to stretching and thinning, thus improving material utilization. The length and width of the square outer shell only require changing the blanking dimensions and adjusting the roller position of the high-frequency tube forming machine, while the height of the aluminum shell can be achieved by adjusting the position of the rotary cutting device at the tail of the high-frequency tube forming machine, saving on stretching die costs and greatly improving the versatility of aluminum shell dimensions for producing different battery cell sizes. The square outer shell process utilizes almost all raw materials, while the stretching die requires first cutting an elliptical piece and then trimming the edges after stretching, further improving material utilization. The rounded corners at the bottom of the stretched aluminum shell reduce the internal space for battery cell winding, while the right angle at the bottom of the square outer shell frees up space for battery cell winding and assembly, which can improve the volumetric energy density of the battery cell. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the aluminum shell processing system of this utility model;

[0011] Figure 2 This is a schematic diagram of the processing flow of the finished aluminum shell of this utility model;

[0012] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0013] Figure 4 This utility model Figure 2 Schematic diagram of the cross-sectional structure at the CC section;

[0014] Figure 5 This utility model Figure 4 Enlarged diagram of point D in the middle.

[0015] Reference numerals: 1. First unwinding device; 100. Square outer shell; 2. High-frequency tube forming device; 200. Base plate; 210. Positioning step; 3. Rotary cutting device; 4. Second unwinding device; 5. Stamping forming device; 6. Rotary welding device; 7. Surface treatment device. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] 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.

[0020] like Figures 2 to 5 As shown, the aluminum shell of this embodiment includes a square outer shell 100 and a base plate 200, which are welded together by a rotary welding device 6. For ease of installation, a positioning step 210 is provided around the base plate 200. The positioning step 210 is stamped by a stamping machine, and its width T2 is 0.3mm-0.8mm. The positioning step 210 is welded to the square outer shell 100. The thickness T1 of the square outer shell 100 is 0.3mm-0.8mm. The thickness B of the base plate 200 is 1.0-1.5mm.

[0021] like Figure 1As shown, this is a processing system for processing aluminum shells, including a shell processing unit, a base plate processing unit, and an assembly unit. The shell processing unit includes a first unwinding device 1, a high-frequency tube forming device 2, and a rotary cutting device 3. The base plate processing unit includes a second unwinding device 4 and a stamping forming device 5. The assembly unit includes a rotary welding device 6. The first unwinding device 1 holds a first aluminum-zinc alloy coil 1000, and the second unwinding device 4 holds a second aluminum-zinc alloy coil 2000. Both devices are conventional unwinding equipment (e.g., CR-100 stamping feeder). The high-frequency tube forming device 2 (e.g., HG16 high-frequency straight seam welded pipe unit) rolls the first aluminum-zinc alloy coil 1000 through several pressure rollers to form it, then welds the unclosed ends using high-frequency welding to obtain a long strip square tube. The rotary cutting device 3 cuts the formed long strip square tube to obtain a square outer shell 100 of length H. A surface treatment device 7 can be installed here to perform surface treatments such as grinding on the weld seams and cut parts of the square outer shell 100. The stamping forming device 5 punches the second aluminum-zinc alloy coil 2000 to obtain a base plate 200 with a positioning step 210. Next, the base plate 200 and the square outer shell 100 are assembled. The positioning step 210 and the directional outer shell 100 facilitate positioning. The rotary welding device 6 includes a fixture; the base plate 200 and the square outer shell 100 are placed within the fixture, and welding of the base plate 200 and the square outer shell 100 is completed using a rotary laser welder or the rotary fixture. After welding, the outer shell is surface-treated by a surface treatment device 7. The surface treatment device 7 includes a vision inspection station and a grinding station. The surface treatment device 7 can be installed in the outer shell processing unit, the base plate processing unit, and the assembly unit, ensuring at least one surface treatment device 7 is present in the assembly unit. This completes the outer shell processing.

[0022] This utility model's square outer shell is manufactured using high-frequency tube making and rotary cutting, achieving a material utilization rate of nearly 100%. This avoids the low material utilization rate encountered during stretching processes. The base plate is stamped and positioned using steps, facilitating processing. This solves the problems of low raw material utilization and high costs in existing aluminum shell production processes.

[0023] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model 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 utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An aluminum shell processing system, characterized in that: It includes an outer shell processing unit, a base plate processing unit and an assembly unit. The outer shell processing unit includes a first unwinding device (1), a high-frequency tube forming device (2) and a rotary cutting device (3). The base plate processing unit includes a second unwinding device (4) and a stamping forming device (5). The assembly unit includes a rotary welding device (6).

2. The aluminum shell processing system according to claim 1, characterized in that: The outer shell processing unit, the base plate processing unit and the assembly unit all include a surface treatment device (7), which includes a visual inspection station and a polishing station.

3. An aluminum shell, processed by the aluminum shell processing system according to claim 1 or 2, characterized in that: It includes a square outer shell (100) and a base plate (200), which are welded by a rotary welding device (6).

4. The aluminum shell according to claim 3, characterized in that: The base plate (200) is provided with a positioning step (210) on its periphery. The positioning step (210) is stamped by a stamping forming device (5). The width of the positioning step (210) is 0.3mm-0.8mm. The positioning step (210) is welded to the square shell (100).

5. The aluminum shell according to claim 3, characterized in that: The thickness of the square outer shell (100) is 0.3mm-0.8mm.

6. The aluminum shell according to claim 3, characterized in that: The thickness of the base plate (200) is 1.0-1.5mm.

Images