Battery box assembly tool and forming process thereof
By introducing automated control and backfill friction stir spot welding RFSSW technology into battery tray welding tooling, traditional welding efficiency, unstable quality and deformation are solved, and efficient and stable welding and forming processes are achieved.
Patent Information
- Application Number
- CN202510128196.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-04-01
AI Technical Summary
Traditional battery trays are inefficient and unstable in welding liquid-cooled plates, and high welding heat causes deformation, affecting flatness, and producing smoke and arc light to the body.
It adopts a battery box assembly tool, including base, workbench, compression assembly, push assembly and heating body, and is automatically controlled by the electronic control system, combined with backfill friction stir spot welding RFSSW technology to achieve automated welding and molding.
It improves welding efficiency and quality stability, reduces welding deformation and manual labor intensity, avoids the harm of arc and dust to the body, and ensures the flatness quality after forming.
Smart Images
Figure CN119733938A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of battery case manufacturing, and in particular to a battery case assembly tool and a molding process thereof. Background Art
[0002] When welding the liquid cooling plate, the traditional battery tray needs to be fixed by TIG spot welding, the frame and the liquid cooling plate need to be pressed and the gap needs to be controlled, and finally the weld seam is manually polished and the excess height of the TIG welding is formed. However, in the actual TIG spot welding operation, there are many disadvantages: TIG welding is manual welding, and the efficiency is low and the quality is unstable when spot welding the frame and the liquid cooling plate. The welding heat is high, which makes the welding deformation large, affecting the overall flatness of the liquid cooling plate, and also produces welding smoke and arc light that can easily damage the body; when manually pressing the frame and the liquid cooling plate, the appearance quality of the liquid cooling plate is easily damaged, and the gap control is uneven; in addition, when manually polishing the excess height of the TIG weld, the grinding quality is uncontrollable and the liquid cooling plate is easy to scratch. Summary of the invention
[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a battery case assembly tool and a molding process thereof to solve one or more problems in the prior art.
[0004] To achieve the above object, the technical solution of the present invention is as follows: A battery box assembly tool comprises a base and a workbench, wherein the workbench is arranged on the surface of the base; clamping components and pushing components are evenly arranged along the edge of the workbench, and a heating body is also arranged on the surface of the workbench.
[0005] Furthermore, the clamping assembly includes a first support and a first adjusting member, the first support is connected to the workbench, and the first adjusting member is rotatably matched with the first support.
[0006] Furthermore, the pushing assembly includes a second support, a push rod and a push plate, the second support is connected to the workbench, the push rod is telescopically fitted to the second support, and one end of the push rod is also connected to the push plate.
[0007] Furthermore, the tooling also includes an electric control system, which is electrically coordinated with the clamping assembly, the pushing assembly and the heating body; the tooling also includes a positioning member, which is arranged on the surface of the workbench.
[0008] A molding process, which is applied to the above-mentioned battery box assembly tool, comprises the following steps: Place the box frame on the workbench and align it with the positioning piece; Place the liquid cooling plate on the frame of the box; The electric control system is turned on to control the pressing assembly and the pushing assembly to fix the box frame and the liquid cooling plate, and at the same time, the box frame and the liquid cooling plate are preheated by the heating body; Based on backfill friction stir spot welding RFSSW and combined with spot welding sequence welding to fix the box frame and liquid cooling plate; The pressing assembly and the pushing assembly are opened by the electric control system to complete the molding.
[0009] Furthermore, the preheating temperature of the heating body is controlled to be 45-55°C.
[0010] Furthermore, the box frame and the liquid cooling plate are fixedly positioned by firstly pushing the box frame by the pushing assembly, and then pressing the box frame and the liquid cooling plate by the pressing assembly.
[0011] Furthermore, during the backfill friction stir spot welding RFSSW, the moving speed of the stirring sleeve is 1-1.2 mm / s, the moving speed of the stirring needle is 2-2.4 mm / s, the rotation speed is 2200-2400 r / min, and the plunge depth is 3.2-3.5 mm.
[0012] Further, the spot welding sequence includes the following steps: Spot weld the corners of the liquid cooling plate; Spot weld the midpoints of each side of the liquid cooling plate; Evenly spot weld other points on each side of the liquid cold plate.
[0013] Furthermore, during the spot welding process, the interval time of spot welding is 3 to 5 seconds, and the distance between adjacent spot welding points is 180 to 200 mm.
[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: The present invention uses backfill friction stir spot welding RFSSW, which eliminates the need for post-weld grinding, effectively reduces the labor intensity of personnel, and reduces the harm of arc light and dust from traditional arc welding to the body; through the use of assembly tooling, while ensuring the precise size of the frame and the liquid cooling plate, the damage caused by traditional manual pressing is avoided; in addition, through the spot welding sequence of the present invention and the use of the heating body of the assembly tooling, the stability of the product welding quality is further improved, and the quality of the flatness of the product after molding is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of the tooling structure of a battery box assembly tooling and its forming process according to an embodiment of the present invention is shown.
[0016] Figure 2 An enlarged structural diagram of a clamping component and a pushing component of a battery box assembly tool and a molding process thereof according to an embodiment of the present invention is shown.
[0017] Markings in the accompanying drawings: 1. base; 2. workbench; 3. clamping assembly; 301. first support; 302. first adjusting member; 4. pushing assembly; 401. second support; 402. push rod; 403. push plate; 5. electronic control system; 6. heating body; 7. positioning member. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following is a further detailed description of a battery box assembly tool and its molding process proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed in the present invention.
[0019] See also Figure 1 to Figure 2 , the battery box assembly tooling of this embodiment, the tooling includes a base 1 and a workbench 2, and the workbench 2 is arranged on the surface of the base 1. The clamping components 3 and the pushing components 4 are evenly arranged along the edge of the workbench 2, and the surface of the workbench 2 is also provided with a heating body 6. In this embodiment, the workbench 2 is rectangular in shape, and in other embodiments, it can also be other shapes, preferably. Seven clamping components 3 and two pushing components 4 are symmetrically arranged on both sides of the long side of the workbench 2, and five clamping components 3 and two pushing components 4 are symmetrically arranged on both sides of the short side of the workbench 2. In addition, four heating bodies 6 are distributed in the area enclosed by the clamping components 3 and the pushing components 4.
[0020] Furthermore, the clamping assembly 3 includes a first support 301 and a first adjusting member 302, the first support 301 is connected to the workbench 2, and the first adjusting member 302 can be rotatably matched with the first support 301, and the box frame and the liquid cooling plate can be clamped or loosened by rotating the first adjusting member 302.
[0021] Furthermore, the pushing assembly 4 includes a second support 401, a push rod 402 and a push plate 403. The second support 401 is connected to the workbench 2, and the push rod 402 is telescopically matched with the second support 401. One end of the push rod 402 is also connected to the push plate 403. Through the telescopic adjustment of the push rod 402, the push plate 403 is driven to be pushed against the box frame for fixation.
[0022] Furthermore, the tooling also includes an electric control system 5, which is electrically coordinated with the clamping assembly 3, the pushing assembly 4 and the heating body 6, thereby realizing automatic control to improve the production efficiency of assembly and welding. The tooling also includes a positioning member 7, which is arranged on the surface of the workbench 2 to preliminarily position the box frame.
[0023] The molding process of this embodiment is applied to the above-mentioned battery box assembly tooling, and the process includes the following steps: The first step: when the clamping assembly 3 and the pushing assembly 4 are in an unrestricted state, a box frame is installed in the workbench 2 and calibrated on the positioning member 7 for preliminary fixation.
[0024] Step 2: Place the liquid cooling plate on the cabinet frame to achieve preliminary positioning and assembly of the liquid cooling plate and the cabinet frame.
[0025] Step 3: Control the clamping assembly 3 and the pushing assembly 4 to fix the box frame and the liquid cooling plate through the electronic control system 5. The fixed positioning is to first push the box frame through the pushing assembly 4, and then press the box frame and the liquid cooling plate through the clamping assembly 3. This sequence can ensure the size of the battery box after molding. At the same time, the box frame and the liquid cooling plate are preheated by the heating body 6, and the preheating temperature of the heating body 6 is controlled to be 45-55°C. If preheating is not performed and backfill friction stir spot welding RFSSW is performed directly, the flatness of the liquid cooling plate will be poor compared to the flatness of RFSSW spot welding after preheating. Specifically, the test results are shown in Table 1 below: Table 1 Step 4: Based on the backfill friction stir spot welding RFSSW and combined with the spot welding sequence welding, the fixed box frame and liquid cooling plate are welded. During the backfill friction stir spot welding RFSSW, the moving speed of the stirring sleeve is controlled to be 1-1.2 mm / s. As an important component of the RFSSW process, the moving speed of the stirring sleeve directly affects the material flow and heat distribution during the welding process. The slower moving speed helps the stirring sleeve to contact the workpiece more fully, thereby promoting heat transfer and uniform flow of materials. At this speed, the stirring sleeve can more effectively backfill the weld and ensure the quality of the weld. The moving speed of the stirring needle is controlled to be 2-2.4 mm / s. Compared with the stirring sleeve, the faster moving speed may help the stirring needle to more effectively stir the material in the weld area and promote the mixing and plastic flow of the material. At this speed, the stirring needle can more effectively shape and backfill the weld, while reducing the heat input during welding and reducing the risk of workpiece deformation. The speed is controlled at 2200-2400r / min, which directly affects the friction heat generation between the stirring head and the workpiece and the plastic flow of the material. A higher speed can generate more friction heat, allowing the material to reach a plastic state faster. At this speed, it can ensure that the material in the weld area is fully softened and plastic flow occurs, thereby forming a good weld. At the same time, a higher speed also helps to improve welding efficiency. The plunge depth is controlled at 3.2-3.5mm. The plunge depth refers to the depth at which the stirring head and the workpiece contact and press down into the inside of the workpiece. This parameter directly affects the shape, size and mechanical properties of the weld. At this depth, it can ensure that the weld has sufficient depth and width, thereby improving the load-bearing capacity and strength of the weld. At the same time, an appropriate plunge depth also helps to reduce heat input and workpiece deformation during welding.
[0026] Furthermore, the spot welding sequence of backfill friction stir spot welding RFSSW includes the following steps: first spot weld the corner points of the liquid cooling plate, then spot weld the midpoints of each side of the liquid cooling plate, and finally evenly spot weld the other points on each side of the liquid cooling plate. During the spot welding process, the interval time of spot welding is 3 to 5s, and the distance between adjacent spot welding points is 180 to 200mm. When spot welding is performed in this sequence, the overall flatness of the liquid cooling plate can be effectively controlled, and the gap between the liquid cooling plate and the box frame can be ensured, as shown in Table 2 below: Table 2 Step 5: The electric control system 5 controls the opening of the clamping assembly 3 and the pushing assembly 4 to complete the molding.
[0027] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0028] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. A battery box assembly tool, characterized in that: The tooling comprises a base and a workbench, wherein the workbench is arranged on the surface of the base; pressing components and pushing components are evenly arranged along the edge of the workbench, and a heating body is also arranged on the surface of the workbench.
2. A battery box assembly tool as claimed in claim 1, characterized in that: The clamping assembly includes a first support and a first adjusting member, the first support is connected to the workbench, and the first adjusting member is rotatably matched with the first support.
3. A battery box assembly tool as claimed in claim 2, characterized in that: The pushing assembly comprises a second support, a push rod and a push plate. The second support is connected to the workbench. The push rod is telescopically matched with the second support. One end of the push rod is also connected to the push plate.
4. A battery box assembly tool as claimed in claim 3, characterized in that: The tooling also includes an electric control system, which is electrically coordinated with the clamping assembly, the pushing assembly and the heating body; the tooling also includes a positioning member, which is arranged on the surface of the workbench.
5. A molding process, the process being applied to a battery box assembly tool as claimed in any one of claims 1 to 4, characterized in that: The process comprises the following steps: Place the box frame on the workbench and align it with the positioning piece; Place the liquid cooling plate on the frame of the box; The electric control system is turned on to control the pressing assembly and the pushing assembly to fix the box frame and the liquid cooling plate, and at the same time, the box frame and the liquid cooling plate are preheated by the heating body; Based on backfill friction stir spot welding RFSSW and combined with spot welding sequence welding to fix the box frame and liquid cooling plate; The pressing assembly and the pushing assembly are opened by the electric control system to complete the molding.
6. A molding process according to claim 5, characterized in that: The preheating temperature of the heating body is controlled to be 45-55°C.
7. A molding process according to claim 6, characterized in that: The fixing and positioning of the box frame and the liquid cooling plate is performed by firstly pushing the box frame tightly by the pushing assembly, and then pressing the box frame and the liquid cooling plate tightly by the pressing assembly.
8. A molding process according to claim 7, characterized in that: During the backfill friction stir spot welding RFSSW, the moving speed of the stirring sleeve is 1-1.2 mm / s, the moving speed of the stirring needle is 2-2.4 mm / s, the rotating speed is 2200-2400 r / min, and the plunge depth is 3.2-3.5 mm.
9. A molding process according to claim 8, characterized in that: The spot welding sequence includes the following steps: Spot weld the corners of the liquid cooling plate; Spot weld the midpoints of each side of the liquid cooling plate; Evenly spot weld other points on each side of the liquid cold plate.
10. A molding process according to claim 9, characterized in that: During the spot welding process, the interval time of spot welding is 3 to 5 seconds, and the distance between adjacent spot welding points is 180 to 200 mm.