New energy automobile battery box

Abstract

The utility model provides a new energy automobile battery box. The new energy automobile battery box comprises an upper cover and a lower box body, wherein the upper cover is made of a glass fiber composite material, and the lower box body is made of aluminum alloy; the upper cover is provided with a first wing plate; the lower box body comprises a bottom plate and a side wall arranged around the bottom plate; a second wing plate is arranged on the outer side of the side wall; the lower end face of the first wing plate is attached to the upper end face of the second wing plate, the tail end of the first wing plate is provided with a bent part, the bent part is tightly attached to the lower end face of the second wing plate, and after the battery module is installed, the upper cover and the lower box body are installed, and the area of the tail end of the first wing plate of the upper cover plate is heated; the upper cover and the lower box body are connected and sealed due to the fact that mechanical connection is not adopted, holes do not need to be formed in the first wing plate and the second wing plate, fibers of the upper cover plate are prevented from being damaged, the local strength is not weakened, and the overall structural strength is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicles, and specifically relates to a battery box for a new energy vehicle. Background Art

[0002] With the development of new energy vehicles, in order to enhance the endurance, all parts need to be designed to be lightweight. Among them, the battery box adopts an aluminum alloy structure, which has a significant lightweight effect. With the advancement of technology, it has gradually evolved into the upper cover of the battery box using new composite materials represented by glass fiber composite materials, which can reduce weight by 15%, and the lower box body uses high-strength aluminum profiles, which has the advantages of high strength grade and low corrosion. However, when the upper cover and the lower box body are connected, if a mechanical connection is used, such as opening a hole and using bolts to connect, the fibers in the new composite material will be destroyed, resulting in the problem of reduced local strength at the connection. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a new energy vehicle battery box, in which the main connection between the upper cover and the lower box body does not adopt mechanical connection, so as to avoid the local strength reduction of the glass fiber composite material at the connection.

[0004] The utility model provides a new energy vehicle battery box, comprising: an upper cover and a lower box body; wherein the upper cover is made of a glass fiber composite material, and the lower box body is made of an aluminum alloy; the upper cover has a first wing panel; the lower box body comprises a bottom plate and a side enclosure arranged around the bottom plate; a second wing panel is arranged on the outside of the side enclosure; the lower end surface of the first wing panel is fitted with the upper end surface of the second wing panel, and the end of the first wing panel has a bending portion, which is tightly fitted with the lower end surface of the second wing panel.

[0005] Furthermore, a sealing structural adhesive is applied between the first wing panel and the second wing panel in the above-mentioned new energy vehicle battery box.

[0006] Furthermore, in the above-mentioned new energy vehicle battery box, a plurality of first transverse beams are fixedly arranged on the bottom plate along the transverse direction; and a plurality of first longitudinal beams are fixedly arranged on the bottom plate along the longitudinal direction.

[0007] Furthermore, the first cross beam and the first longitudinal beam in the above-mentioned new energy vehicle battery box are composed of a third wing plate and two hexagonal tubes arranged vertically above the third wing plate.

[0008] Furthermore, in the above-mentioned new energy vehicle battery box, second longitudinal beams are fixedly arranged on both sides of the bottom plate along the longitudinal direction; the cross-section of the second longitudinal beam is "L"-shaped; and the second longitudinal beam is arranged in close contact with the side enclosure.

[0009] Furthermore, in the above-mentioned new energy vehicle battery box, a plurality of first reinforcing ribs are arranged in the transverse direction on the bottom plate; and a plurality of second reinforcing ribs are arranged in the transverse direction on the upper cover.

[0010] Furthermore, the lower box body of the above-mentioned new energy vehicle battery box also includes a plurality of mounting supports; the mounting supports are fixedly arranged on the first cross beam and the first longitudinal beam; the upper cover is provided with a plurality of mounting holes; the positions of the mounting holes correspond to the positions of the mounting supports.

[0011] Furthermore, the inner wall of the side enclosure in the above-mentioned new energy vehicle battery box is vertically provided with two hollow protrusions; the cross-section of the hollow protrusion is an isosceles trapezoid, and the lower base of the isosceles trapezoid is in contact with the side enclosure.

[0012] Furthermore, a plurality of groups of lifting ears are arranged on the outer side of the side wall of the above-mentioned new energy vehicle battery box.

[0013] Furthermore, in the above-mentioned new energy vehicle battery box, moisture-absorbing plates are bonded on both sides of the inner wall of the lower box body; and wiring space for high and low voltage wiring harnesses is reserved on both sides of the lower box body.

[0014] The beneficial effect of the utility model is that the upper cover is made of glass fiber composite material. After the battery module is installed, the upper cover and the lower box body are installed, and the area at the end of the first wing plate of the upper cover is heated to soften it and fit tightly with the lower end surface of the second wing plate to form a bending portion, thereby completing the connection and sealing of the upper cover and the lower box body. Since no mechanical connection is used, there is no need to open holes in the first wing plate and the second wing plate, so that the fibers of the upper cover are protected from damage, the local strength will not be weakened, and the overall structural strength is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the upper cover structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the lower box structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the side cross section of the utility model;

[0018] Figure 4 This is a schematic diagram of the first longitudinal beam structure of the utility model;

[0019] Figure 5 It is a schematic cross-sectional view of the first cross beam and the first longitudinal beam of the utility model;

[0020] Figure 6 This is a schematic diagram of the lower box of the utility model after the battery module is installed;

[0021] Figure 7 This is a schematic diagram of the first installation process of the upper cover and the lower box body of the utility model;

[0022] Figure 8 This is a schematic diagram of the second installation process of the upper cover and the lower box body of the utility model;

[0023] Fig. 9 This is a schematic diagram of the third installation process of the upper cover and the lower box body of the utility model.

[0024] Figure numerals: 1: upper cover; 11: first wing panel; 111: bending portion; 12: second reinforcing rib; 13: mounting hole; 2: lower box body; 21: side panel; 211: second wing panel; 212: lifting ear; 22: bottom plate; 23: first reinforcing rib; 24: first cross beam; 25: first longitudinal beam; 26: second longitudinal beam; 27: mounting support; 281: third wing panel; 282: hexagonal tube; 3: battery module. DETAILED DESCRIPTION

[0025] like Figure 1 and Figure 2 As shown, the utility model comprises: an upper cover 1 and a lower box body 2, wherein the upper cover 1 is made of glass fiber composite material and can be manufactured by a compression molding process, and the lower box body 2 is made of aluminum alloy. The upper cover 1 has a first wing plate 11; the lower box body 2 comprises a bottom plate 22 and a side enclosure 21 arranged around the bottom plate 22, and a second wing plate 211 is arranged on the outer side of the side enclosure 21. Figure 3 Two hollow protrusions are vertically arranged on one side of the inner wall of the side enclosure 21, and the cross section of the hollow protrusion is an isosceles trapezoid, and the lower bottom edge of the isosceles trapezoid fits with the side enclosure 21, which can increase the structural strength of the side enclosure 21. At the same time, in order to facilitate later installation and hoisting, a plurality of groups of lifting ears 212 are also arranged on the outer side of the side enclosure 21.

[0026] In this embodiment, a first cross beam 24 is disposed on the bottom plate 22 in the horizontal direction, and a first longitudinal beam 25 is disposed in the longitudinal direction. It should be noted that the number of the first cross beam 24 and the first longitudinal beam 25 can be adjusted according to the size of the battery box. Figure 4 Combined with Figure 5 The first cross beam 24 and the first longitudinal beam 25 are composed of a third wing plate 281 and two hexagonal tubes 282 arranged vertically above the third wing plate 281; while ensuring the mechanical strength, the weight of the lower box is reduced. The first cross beam 24 and the first longitudinal beam 25 form a frame structure with the side wall 21, which is a highly reliable load-bearing structure. Figure 2 Combined with Figure 6 , second longitudinal beams 26 are fixedly arranged along the longitudinal direction on both sides of the bottom plate 22, and can be fixed to the bottom plate 22 by welding or other methods. The cross section of the second longitudinal beam 26 is "L" shaped, and the second longitudinal beam 26 is arranged in close contact with the side wall 21. In addition, threaded holes can be opened on the third wing plate 281 and the second longitudinal beam 26 for fixing the battery module 3, thereby avoiding opening holes on the bottom plate 22 to reduce the overall strength of the bottom plate 22.

[0027] In order to enhance the local strength, a plurality of first reinforcing ribs 23 are arranged on the bottom plate 22 in the transverse direction. The intervals between the first reinforcing ribs 23 are just enough to place a battery module 3. Figure 6 Similarly, Figure 1 As shown, a second reinforcing rib 12 may also be provided on the upper cover 1 .

[0028] If the battery box is large in size, relying solely on the connection between the first wing panel 11 and the second wing panel 211 may cause the upper cover 1 to arch, so a mounting hole 13 is opened on the upper cover 1, and the lower box body 2 also includes a plurality of mounting supports 27, and the mounting supports 27 are fixedly arranged on the first cross beam 24 and the first longitudinal beam 25. The position of the mounting hole 13 corresponds to the position of the mounting supports 27, and the upper cover 1 is more firmly fixed to the lower box body 2 by bolt connection.

[0029] Moisture absorbing plates are bonded on both sides of the inner wall of the lower box 2, which can fully absorb the moisture entering the battery box in the first place, preventing the moisture from flowing in the battery box and causing the battery module 3 to be damp. At the same time, there is space reserved on both sides of the lower box 2 for routing high and low voltage harnesses.

[0030] refer to Figure 6 , and combined with Figure 7-Figure 9 After the battery module 3 is installed, the upper cover 1 is placed on the lower box body 2, the second wing plate 211 is first sandblasted, and then the surface of the first wing plate 11 is mechanically polished, and then the upper end surface of the second wing plate 211 is heated by a laser beam, and then the lower end surface of the first wing plate 11 is welded to the upper end surface of the second wing plate 211, and the reference Figure 8 Then, the portion of the first wing plate 11 that exceeds the second wing plate 211 is heated. After the composite material softens, the portion that exceeds the second wing plate 211 is pressurized and bent to form a bent portion 111, and the bent portion 111 is closely attached to the lower end surface of the first wing plate 11. Fig. 9 As shown. If you encounter corners, you can reserve the corresponding angle when processing the upper cover, apply pressure from both sides, and overlap the seams to ensure the sealing effect. After the curing is completed, the upper cover 1 and the lower box body 2 are connected and sealed, and the upper cover 1 is finally shaped. In order to better achieve bonding and sealing, a sealing adhesive can also be applied between the first wing plate 11 and the second wing plate 211.

[0031] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0032] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A new energy vehicle battery box, characterized in that: include: An upper cover (1) and a lower box body (2); Wherein, the upper cover (1) is made of a glass fiber composite material, and the lower box body (2) is made of an aluminum alloy; The upper cover (1) has a first wing plate (11); The lower box body (2) comprises a bottom plate (22) and a side enclosure (21) arranged around the bottom plate (22); A second wing plate (211) is provided on the outer side of the side enclosure (21); The lower end surface of the first wing plate (11) is fitted with the upper end surface of the second wing plate (211), and the end of the first wing plate (11) has a bent portion (111), and the bent portion (111) is tightly fitted with the lower end surface of the second wing plate (211).

2. The new energy vehicle battery box according to claim 1, characterized in that: A sealing structural adhesive is applied between the first wing panel (11) and the second wing panel (211).

3. The new energy vehicle battery box according to claim 1, characterized in that: The bottom plate (22) is fixedly provided with a plurality of first cross beams (24) in a transverse direction; The bottom plate (22) is fixedly provided with a plurality of first longitudinal beams (25) along the longitudinal direction.

4. The new energy vehicle battery box as claimed in claim 3, characterized in that: The first cross beam (24) and the first longitudinal beam (25) are composed of a third wing plate (281) and two hexagonal tubes (282) arranged vertically above the third wing plate (281).

5. The new energy vehicle battery box as claimed in claim 3, characterized in that: Second longitudinal beams (26) are fixedly arranged on both sides of the bottom plate (22) along the longitudinal direction; The cross section of the second longitudinal beam (26) is "L" shaped; The second longitudinal beam (26) is arranged in close contact with the side panel (21).

6. The new energy vehicle battery box as claimed in claim 3, characterized in that: The bottom plate (22) is provided with a plurality of first reinforcing ribs (23) in a transverse direction; The upper cover (1) is provided with a plurality of second reinforcing ribs (12) in a transverse direction.

7. The new energy vehicle battery box as claimed in claim 3, characterized in that: The lower box body (2) further comprises a plurality of mounting supports (27); The mounting support (27) is fixedly arranged on the first cross beam (24) and the first longitudinal beam (25); The upper cover (1) is provided with a plurality of mounting holes (13); The position of the mounting hole (13) corresponds to the position of the mounting support (27).

8. The new energy vehicle battery box according to claim 1, characterized in that: The inner wall of the side enclosure (21) is provided with two hollow protrusions in the vertical direction; The cross-section of the hollow protrusion is an isosceles trapezoid, and the lower base of the isosceles trapezoid fits with the side perimeter (21).

9. The new energy vehicle battery box according to claim 1, characterized in that: A plurality of groups of lifting ears (212) are arranged on the outer side of the side enclosure (21).

10. The new energy vehicle battery box according to claim 1, characterized in that: Moisture absorbing plates are bonded to both sides of the inner wall of the lower box body (2); Both sides of the lower box (2) are reserved with wiring spaces for high and low voltage wiring harnesses.

Images