A new energy vehicle battery pack bracket

Abstract

The present invention discloses a new energy vehicle battery pack bracket. The bracket includes a first horizontal plane, a vertical plane, a second horizontal plane, an inclined plane, and a symmetrical first side surface and a second side surface that are adjacent to each other in sequence. The first horizontal plane is attached to and fixed to the upper surface of the protruding part of the battery pack, and the vertical plane is attached to and fixed to a vertical side surface of the protruding part of the battery pack; the second horizontal plane is located in the transition area between the protruding part of the battery pack and the floor beam, a part of it is attached to and fixed to the bottom flange of the protruding part of the battery pack, and the other part is suspended, and the inclined plane is attached to and fixed to the floor beam. The present invention connects the floor beam and the protruding part of the battery pack into an integral beam from left to right by installing two of the brackets respectively between the protruding part of the battery pack and the disconnected floor beam, thereby improving the continuity of the beam stiffness, strengthening the natural modes of the floor and the battery pack, and reducing the structural noise caused by the mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile manufacturing, and in particular relates to a battery pack bracket for a new energy automobile. Background Art

[0002] At present, the research on NVH (Noise, Vibration, Harshness) performance of domestic automobiles is mainly aimed at traditional automobiles, while the research on NVH performance of new energy vehicles is still in its infancy. With the rapid increase in the number of new energy vehicles in China, the customer groups have higher and higher requirements for the NVH performance of new energy vehicles. Most new energy vehicle models on the market generally meet customers' demand for driving range by increasing the number of battery packs. The increase in the number of battery packs leads to an increase in the volume of the battery pack, which reduces the NVH optimization space of the car and causes its unreasonable structure, which is specifically manifested in:

[0003] (1) The protruding part in the middle of the battery pack lacks support;

[0004] (2) At the protruding part of the battery pack, the crossbeam under the vehicle floor is disconnected in the middle, resulting in discontinuous stiffness;

[0005] (3) The existing battery pack bracket structure tends to be flat and lacks cavity support. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention proposes a new energy vehicle battery pack bracket, which can connect the floor beam and the protruding part of the battery pack into an integral beam from left to right, thereby improving the continuity of the beam stiffness.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A new energy vehicle battery pack bracket is installed between one side of the battery pack protrusion and the floor beam. The bracket is in the shape of a dustpan as a whole, including a first horizontal plane, a vertical plane, a second horizontal plane, an inclined plane, and a first side surface and a second side surface that are symmetrical relative to the center line of the bracket and are perpendicular to and adjacent to the first horizontal plane, the vertical plane, the second horizontal plane, and the inclined plane. The first horizontal plane is attached to and fixed to the upper surface of the battery pack protrusion; the vertical plane is attached to and fixed to a vertical side surface of the battery pack protrusion; the second horizontal plane is located in the transition area between the battery pack protrusion and the floor beam, a part of which is attached to and fixed to the bottom flange of the battery pack protrusion, and the other part is suspended; the inclined plane is attached to and fixed to the floor beam.

[0009] Furthermore, the connection method between the first horizontal plane, the vertical plane and the second horizontal plane and the protruding part of the battery pack, as well as the connection method between the inclined plane and the floor beam, are all carbon dioxide shielded welding methods.

[0010] Furthermore, ribs are provided at the transition between the vertical surface and the second horizontal surface.

[0011] Furthermore, the height of the rib is 5 mm.

[0012] Furthermore, a first bolt mounting hole is provided on the second horizontal surface, and a second bolt mounting hole is provided on the inclined surface.

[0013] Furthermore, the first side surface and the second side surface are both provided with flanges.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention proposes a new energy vehicle battery pack bracket, comprising a first horizontal plane, a vertical plane, a second horizontal plane, an inclined plane, and a symmetrical first side surface and a second side surface that are adjacent to each other in sequence. The first horizontal plane is bonded to and fixed to the upper surface of the protruding part of the battery pack, and the vertical plane is bonded to and fixed to a vertical side surface of the protruding part of the battery pack; the second horizontal plane is located in the transition area between the protruding part of the battery pack and the floor beam, a part of which is bonded to and fixed to the bottom flange of the protruding part of the battery pack, and the other part is suspended, and the inclined plane is bonded to and fixed to the floor beam. The present invention improves the continuity of the beam stiffness, strengthens the inherent modes of the floor and the battery pack, and reduces the structural noise caused by the mode by installing the two brackets on the left and right sides of the protruding part of the battery pack and between the disconnected floor beam, so that the disconnected floor beam and the protruding part of the battery pack are connected to form an integral beam from left to right. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a new energy vehicle battery pack bracket according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the bracket assembly.

[0018] In the figure: 1-first horizontal plane, 2-vertical plane, 3-second horizontal plane, 4-inclined plane, 5-first side surface, 6-second side surface, 7-rib, 8-first bolt mounting hole, 9-second bolt mounting hole, 10-protruding part of the battery pack, 11-bottom flange, 12-floor crossbeam. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] A schematic diagram of a new energy vehicle battery pack bracket according to an embodiment of the present invention is shown in FIG. Figure 1 , 2 As shown, the bracket is installed between one side of the battery pack protruding part 10 and the floor beam 12. The bracket is in the shape of a dustpan as a whole, including a first horizontal plane 1, a vertical plane 2, a second horizontal plane 3, an inclined plane 4, which are adjacent to each other in sequence, and a first side surface 5 and a second side surface 6 which are symmetrical relative to the center line of the bracket and are perpendicular to and adjacent to the first horizontal plane 1, the vertical plane 2, the second horizontal plane 3 and the inclined plane 4. The first horizontal plane 1 is attached to and fixed to the upper surface of the battery pack protruding part 10; the vertical plane 2 is attached to and fixed to a vertical side surface of the battery pack protruding part 10; the second horizontal plane 3 is located in the transition area between the battery pack protruding part 10 and the floor beam 12, a part of which is attached to and fixed to the bottom flange 11 of the battery pack protruding part 10, and the other part is suspended; the inclined plane 4 is attached to and fixed to the floor beam 12.

[0021] In this embodiment, the bracket is used to connect the floor crossbeam 12, which has to be disconnected because the battery pack protrusion 10 occupies space, with the battery pack protrusion 10 to form an integral crossbeam. The battery pack protrusion 10 is approximately in the shape of a rectangular parallelepiped, with three vertical side surfaces and one upper surface exposed to the outside, and a bottom flange 11 is provided at the bottom. Therefore, in actual application, the two brackets need to be installed respectively between the two opposite sides of the battery pack protrusion 10 and the disconnected floor crossbeam 12.

[0022] In this embodiment, the overall shape of the bracket is similar to a dustpan, and is mainly composed of a first horizontal surface 1, a vertical surface 2, a second horizontal surface 3, an inclined surface 4, and opposite first side surfaces 5 and second side surfaces 6. The first horizontal surface 1 is located at the tail of the dustpan, and is attached to and fixed to the upper surface of the protruding portion 10 of the battery pack during installation; the vertical surface 2 is adjacent to the first horizontal surface 1, and is attached to and fixed to a vertical side surface of the protruding portion 10 of the battery pack during installation. In this embodiment, the horizontal and vertical are approximate terms, not the exact horizontal and vertical directions. When designing, the inclination angle should be designed to fit the protruding part 10 of the battery pack to the maximum extent. The second horizontal plane 3 is adjacent to the vertical plane 2. During installation, a part of it fits and is fixed to the bottom flange 11 of the protruding part 10 of the battery pack, and the part close to the floor beam 12 is suspended. This is because the second horizontal plane 3 is located in the transition area between the protruding part 10 of the battery pack and the floor beam 12. The floor beam 12 in this area is an inclined surface. The inclined surface 4 is adjacent to the second horizontal plane 3 and is located at the front end of the dustpan. During installation, the inclined surface 4 fits and is fixed to the inclined surface of the floor beam 12. The inclination of the inclined surface 4 is consistent with the inclined surface of the floor beam 12.

[0023] In this embodiment, two brackets are installed on the left and right sides of the battery pack protrusion 10 and between the disconnected floor beam 12, so that the disconnected floor beam 12 and the battery pack protrusion 10 are connected to form an integral beam from left to right, thereby improving the continuity of the beam stiffness, strengthening the natural modes of the floor and the battery pack, and reducing the structural noise caused by the mode. Experiments show that the mode of the battery pack protrusion structure is increased from 71Hz to 80Hz; the road noise response of the whole vehicle is reduced by 3.1dB at 71Hz, and other frequency points are also significantly reduced.

[0024] As an optional embodiment, the connection method of the first horizontal plane 1, the vertical plane 2 and the second horizontal plane 3 with the protruding part 10 of the battery pack, as well as the connection method of the inclined plane 4 with the floor beam 12 are all carbon dioxide shielded welding methods.

[0025] This embodiment provides a fixed connection method between the bracket and the protruding part 10 of the battery pack and the floor beam 12, that is, all adopt carbon dioxide shielded welding. Carbon dioxide shielded welding is a method of welding using carbon dioxide gas as a shielding gas. It is suitable for automatic welding and all-round welding. There should be no wind during welding, which is suitable for indoor operations. Carbon dioxide shielded welding has the advantages of low cost, simple operation, and small deformation after welding.

[0026] As an optional embodiment, a rib 7 is provided at a transition point between the vertical surface 2 and the second horizontal surface 3 .

[0027] In this embodiment, in order to strengthen the rigidity of the junction between the vertical plane 2 and the second horizontal plane 3, a rib 7 is provided at the transition between the vertical plane 2 and the second horizontal plane 3. The rib 7 is made by stamping and is integrally formed with the adjacent parts.

[0028] Preferably, the height of the rib 7 is 5 mm.

[0029] As an optional embodiment, a first bolt mounting hole 8 is provided on the second horizontal surface 3 , and a second bolt mounting hole 9 is provided on the inclined surface 4 .

[0030] In this embodiment, in order to strengthen the connection between the bracket and the battery pack protruding part 10 and the floor cross beam 12, bolt mounting holes are respectively provided on the second horizontal surface 3 and the inclined surface 4 of the bracket, namely, the first bolt mounting hole 8 and the second bolt mounting hole 9. The second horizontal surface 3 of the bracket is fastened to the bottom flange 11 of the battery pack protruding part 10, and the inclined surface 4 of the bracket is fastened to the floor cross beam 12 by the cooperation of bolts and nuts.

[0031] As an optional embodiment, both the first side surface 5 and the second side surface 6 are provided with flanges.

[0032] In this embodiment, in order to improve the rigidity of the first side surface 5 and the second side surface 6 of the bracket, flanges are provided on both sides.

[0033] The above only illustrates several specific embodiments of the present invention, but it cannot be regarded as the protection scope of the present invention. Any equivalent changes or modifications or proportional enlargement or reduction made according to the design spirit of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. A new energy vehicle battery pack bracket, characterized in that: The bracket is installed between one side of the protruding part of the battery pack and the floor beam, the protruding part of the battery pack divides the middle of the floor beam, and the bracket is provided on both sides of the protruding part of the battery pack; the bracket is overall dustpan-shaped, including a first horizontal plane, a vertical plane, a second horizontal plane, an inclined plane adjacent to each other in sequence, and a first side surface and a second side surface that are symmetrical relative to the center line of the bracket and are perpendicular to and adjacent to the first horizontal plane, the vertical plane, the second horizontal plane and the inclined plane; the first horizontal plane is adhered to and fixed to the upper surface of the protruding part of the battery pack; the vertical plane is adhered to and fixed to a vertical side surface of the protruding part of the battery pack; the second horizontal plane is located in the transition area between the protruding part of the battery pack and the floor beam, a part of it is adhered to and fixed to the bottom flange of the protruding part of the battery pack, and the other part is suspended; the inclined plane is adhered to and fixed to the floor beam.

2. The new energy vehicle battery pack bracket according to claim 1, characterized in that: The connection method between the first horizontal plane, the vertical plane and the second horizontal plane and the protruding part of the battery pack, as well as the connection method between the inclined plane and the floor beam, are all carbon dioxide shielded welding methods.

3. The new energy vehicle battery pack bracket according to claim 1, characterized in that: A rib is provided at a transition point between the vertical surface and the second horizontal surface.

4. The new energy vehicle battery pack bracket according to claim 3, characterized in that: The height of the ribs is 5 mm.

5. The new energy vehicle battery pack bracket according to claim 1, characterized in that: The second horizontal surface is provided with a first bolt mounting hole, and the inclined surface is provided with a second bolt mounting hole.

6. The new energy vehicle battery pack bracket according to any one of claims 1 to 5, characterized in that: The first side surface and the second side surface are both provided with flanges.

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