Aluminum alloy battery box body of commercial vehicle

Abstract

The utility model discloses an aluminum alloy battery box body for a commercial vehicle, and relates to the technical field of automobile parts. Comprising a battery frame and a lower shell, and the lower shell is welded to the bottom of the battery frame to seal the bottom of the battery frame; the battery frame comprises two groups of U-shaped frames, and the two groups of U-shaped frames are in butt joint to define a closed frame structure; the lower shell comprises a bottom plate piece and an upper sealing plate piece, and the upper sealing plate piece is welded to the bottom plate piece in a brazing mode. The U-shaped frame of the battery frame is formed at a time through extrusion and bending, the process cost is reduced, only two welding seams at the butt joint position exist in the machining process of assembling a frame body, the welding seams are reduced, the welding cost is reduced, and the leakage risk is reduced by more than 50% on the basis of the original scheme; the new structure only needs to process local mounting point positions, so that the machining cost is reduced; the bottom shell is integrally punched and formed and connected with the frame through friction stir welding, and the risk of sealing leakage does not exist. According to the structural design of the battery box body, the overall weight is reduced, and the material cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an aluminum alloy battery box for commercial vehicles. Background Art

[0002] Battery case structures for new energy commercial vehicles are primarily constructed using aluminum alloy one-piece die-casting and aluminum profile welding. Disadvantages of one-piece aluminum profile die-casting include the tendency to produce air holes, high scrap rates, and the need for large, expensive die-casting machines. Welded aluminum profiles also require numerous weld areas, resulting in a high risk of weld seal leakage, extensive machining, and a relatively high overall cost.

[0003] In existing battery cases, the rectangular frame is formed by four aluminum profile edges. This original aluminum profile frame requires four welds, all of which are 90-degree lap welds, making weld quality difficult to control. Furthermore, the original battery compartment bottom shell uses a welded aluminum profile structure, which also has sealing and leakage issues. To address these issues, a commercial vehicle aluminum alloy battery case was designed. Utility Model Content

[0004] The purpose of the utility model is to provide an aluminum alloy battery box for commercial vehicles in order to solve the above problems.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] The utility model discloses an aluminum alloy battery box for commercial vehicles, comprising a battery frame and a lower shell, wherein the lower shell is welded to the bottom of the battery frame to seal the bottom of the battery frame;

[0007] The battery frame includes two sets of U-shaped frames, and the two sets of U-shaped frames are relatively joined to form a closed frame structure;

[0008] The lower shell includes a bottom plate and an upper sealing plate, and the upper sealing plate is brazed and welded to the bottom plate.

[0009] Furthermore, the U-shaped frame is a frame formed in one piece by extruding and bending an aluminum profile.

[0010] Furthermore, the two sets of U-shaped frames are welded together at their relative positions to form a closed frame structure.

[0011] Furthermore, the battery frame and the lower shell are connected by a stir friction welding process.

[0012] Furthermore, the bottom plate is a stamped plate, a cooling water channel is stamped on the bottom of the bottom plate, and the upper sealing plate is used to cover and seal the cooling water channel.

[0013] Furthermore, a connecting piece is connected between the two groups of U-shaped frames near the lower shell.

[0014] In the above technical solution, the utility model provides a commercial vehicle aluminum alloy battery box, which has the following beneficial effects:

[0015] The U-shaped frame of this battery case is formed in a single step through extrusion and bending, reducing process costs. During assembly, only two welds are required at the joints, reducing welding costs and lowering the risk of leakage by over 50% compared to the original design. The new structure only requires machining at the local mounting points, reducing machining costs. The integrally stamped bottom shell and frame are joined using a friction stir welding process, eliminating the risk of seal leakage. This structural design of the battery case reduces overall weight and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic structural diagram of an aluminum alloy battery box for commercial vehicles provided by an embodiment of the utility model;

[0018] Figure 2 A schematic structural diagram of the lower shell of an aluminum alloy battery box for a commercial vehicle provided by an embodiment of the utility model;

[0019] Figure 3 A schematic structural diagram of a U-shaped frame of an aluminum alloy battery box for a commercial vehicle provided in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Battery frame; 2. Lower shell; 101. U-shaped frame; 102. Connector; 201. Bottom plate; 202. Upper sealing plate; 203. Cooling water channel. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1-3 , a commercial vehicle aluminum alloy battery box, comprising a battery frame 1 and a lower shell 2, wherein the lower shell 2 is welded to the bottom of the battery frame 1 to seal the bottom of the battery frame 1, thereby forming a battery box;

[0024] The battery frame 1 includes two sets of U-shaped frames 101. The two sets of U-shaped frames 101 are relatively joined to form a closed frame structure, which is equivalent to the U-shaped frame 101 having two legs. The two sets of U-shaped frames 101 are symmetrical to each other, so that the two legs are connected to form a rectangular frame structure, which is also the frame structure of the battery box. There are only two leg positions at the connection point, which means that there are two positions that need to be welded. Compared with the four weld seams in the prior art, they are all 90-degree lap welds, and the welding quality is also difficult to control. After the improvement, the frame of this device has two weld seams, and they are located in the middle plane position, which reduces the risk of welding seal leakage, reduces process costs, reduces welds, reduces welding costs, and reduces the leakage risk by more than 50% compared with the original solution.

[0025] The lower shell 2 includes a bottom plate 201 and an upper sealing plate 202 . The upper sealing plate 202 is brazed onto the bottom plate 201 to form the lower shell 2 , and the bottom plate 201 of the lower shell 2 is welded to the battery frame 1 .

[0026] Furthermore, the U-shaped frame 101 is a frame formed in one piece by extruding and bending an aluminum profile.

[0027] Furthermore, the two sets of U-shaped frames 101 are welded at their relative positions to form a closed frame structure. There are two weld seams on the frame, and they are located in the middle plane to reduce the risk of welding seal leakage.

[0028] Furthermore, the battery frame 1 and the lower shell 2 are connected by a stir friction welding process. The original battery box lower shell 2 adopts an aluminum profile welding structure, while the new structure adopts an integrated stamping forming process and the battery frame 1 is connected by a stir friction welding process to avoid the sealing leakage problem.

[0029] Furthermore, the bottom plate 201 is a stamped plate, and a cooling water channel 203 is stamped on the bottom of the bottom plate 201. The upper sealing plate 202 is used to cover and seal the cooling water channel 203 so that coolant flows through the cooling water channel 203 to achieve battery heat dissipation.

[0030] Furthermore, a connector 102 is connected between the two sets of U-shaped frames 101 near the lower shell 2 to reinforce and support the battery frame 1 formed by the two sets of U-shaped frames 101 to ensure the stability of the overall structure.

[0031] In summary, the U-shaped frame of this battery case is formed in a single step through extrusion and bending, reducing process costs. During assembly into the frame, only two welds are required at the joints, reducing welding costs and lowering the risk of leakage by over 50% compared to the original design. The new structure only requires machining at the local mounting points, reducing machining costs. The integral stamping of the bottom shell and the frame are joined using a friction stir welding process, eliminating the risk of seal leakage. This structural design of the battery case reduces overall weight and material costs.

[0032] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A commercial vehicle aluminum alloy battery box, characterized in that: It comprises a battery frame (1) and a lower shell (2), wherein the lower shell (2) is welded to the bottom of the battery frame (1) to seal the bottom of the battery frame (1); The battery frame (1) comprises two groups of U-shaped frames (101), and the two groups of U-shaped frames (101) are relatively joined to form a closed frame structure; The lower shell (2) comprises a bottom plate (201) and an upper sealing plate (202), and the upper sealing plate (202) is brazed and welded to the bottom plate (201).

2. The commercial vehicle aluminum alloy battery box according to claim 1, characterized in that: The U-shaped frame (101) is a frame formed in one piece by extruding and bending an aluminum profile.

3. The commercial vehicle aluminum alloy battery box according to claim 1, characterized in that: The two sets of U-shaped frames (101) are welded together at their relative positions to form a closed frame structure.

4. The commercial vehicle aluminum alloy battery box according to claim 1, characterized in that: The battery frame (1) and the lower shell (2) are connected using a stir friction welding process.

5. The commercial vehicle aluminum alloy battery box according to claim 1, characterized in that: The bottom plate (201) is a stamped plate, a cooling water channel (203) is stamped on the bottom of the bottom plate (201), and the upper sealing plate (202) is used to cover and seal the cooling water channel (203).

6. The commercial vehicle aluminum alloy battery box according to claim 1, characterized in that: A connecting piece (102) is connected between the two sets of U-shaped frames (101) at a position close to the lower shell (2).

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