CN220796933U

CN220796933U - Bracket for improving extrusion resistance of battery pack

Info

Publication number: CN220796933U
Application number: CN202322180002.0U
Authority: CN
Inventors: 孙正阳
Original assignee: Shanghai Guoxuan New Energy Co Ltd
Current assignee: Shanghai Guoxuan New Energy Co Ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-04-16
Anticipated expiration: 2033-08-14

Abstract

The utility model provides a bracket for improving extrusion resistance of a battery pack, which relates to the technical field of vehicle-mounted battery packs and comprises the following components: the upper layer plate is arranged above the lower layer plate, and the thickness of the upper layer plate is smaller than that of the lower layer plate; the connecting plate is connected with the upper layer plate and the lower layer plate, and a space is reserved between the upper layer plate and the lower layer plate; wherein, the upper layer board possesses the atress crumple zone, and one side of lower layer board is equipped with crooked guide surface. The extrusion-resistant device has the beneficial effects that the bending direction of the bracket is changed through the collapse surface and the guide surface when the battery pack is extruded and stressed, and extrusion energy is absorbed through the bracket, so that the extrusion-resistant capability of the battery pack is provided; through adjusting the structural design of the bracket, the bracket has certain structural strength, and the energy absorption cavity between the upper layer plate and the lower layer plate can further absorb the energy during extrusion.

Description

Bracket for improving extrusion resistance of battery pack

Technical Field

The utility model relates to a vehicle battery package technical field especially relates to a promote support of battery package extrusion resistance ability.

Background

On a new energy passenger car (or passenger car), a power battery pack is usually installed. These battery packs must meet national relevant safety standards, such as electric vehicle power storage battery safety requirements. Wherein, the battery pack needs to pass the extrusion test, and extrusion is performed in the X and Y directions respectively. Therefore, the case strength design of the battery pack is critical.

Besides the frame of the box body and the internal reinforcing beams, a bracket with certain strength is designed at the front, back, left, right and the like of the battery pack. The brackets not only can fix the wire harness and the pipeline of the whole vehicle, but also can bear the extrusion test of the battery pack so as to protect components in the battery pack and enable the components to pass the extrusion test more easily.

The material of the bracket can be carbon steel, aluminum profile or other composite materials, and the structure can be diversified. As for the mounting and fixing manner of the bracket and the case, various methods such as screws, welding and the like can be adopted.

The design of the bracket on the current battery pack box body is mainly concentrated on the chassis exterior trim parts such as the installation and fixation wire harness, the bottom protection guard plate, the heat shield and the like. Thus, the stent design is too simple and single-acting.

However, when the extrusion test of the national security standard is performed, the extrusion (X or Y direction) of the battery pack is easily deviated, the tilting, etc. problems are easily caused due to the presence of the bracket, thereby increasing the intrusion amount inside the battery pack. This may cause a collision with the charged module or component in the battery pack, thereby causing a fire or explosion accident. Therefore, the battery pack has insufficient extrusion resistance and cannot pass the extrusion test link.

Disclosure of Invention

To the problem that exists among the prior art, this provides a promote support of battery package extrusion resistance ability, include:

the upper layer plate is arranged above the lower layer plate, and the thickness of the upper layer plate is smaller than that of the lower layer plate;

the connecting plate is connected with the upper layer plate and the lower layer plate, and a space is reserved between the upper layer plate and the lower layer plate;

the upper layer plate is provided with a stress crumple zone, and one side of the lower layer plate is provided with a bending guide surface.

Preferably, the stress crumple zone is of a wave-shaped structure.

Preferably, the connection plates all extend in a first direction;

the wavy structure comprises concave surfaces and convex surfaces which are alternately arranged in sequence along the second direction.

Preferably, the concave surface is a concave arc surface, and the convex surface is a convex arc surface.

Preferably, a hollow energy absorption cavity is formed between the upper layer plate and the lower layer plate.

Preferably, a plurality of said webs are included, wherein one of said webs divides said energy absorbing cavity into a first region and a second region.

Preferably, the force-receiving crush zone is located in the first region.

Preferably, a riveting nut machining hole is formed in the upper layer plate, and the riveting nut machining hole is located in the second area.

Preferably, the curved guide surface is a chamfer structure located at an end of the lower plate.

Preferably, the curved guide surface is an inclined plate connecting the lower plate and the connecting plate, and the inclined plate is obliquely arranged relative to the lower plate and the connecting plate.

The technical scheme has the following advantages or beneficial effects:

1) The bending direction of the bracket is changed through the collapsing surface and the guide surface when the battery pack is extruded and stressed, and extrusion energy is absorbed through the bracket, so that the extrusion resistance of the battery pack is provided;

2) Through adjusting the structural design of the bracket, the bracket has certain structural strength, and the energy absorption cavity between the upper layer plate and the lower layer plate can further absorb the energy during extrusion.

Drawings

FIG. 1 is a schematic view of a bracket for improving the extrusion resistance of a battery pack according to the preferred embodiment;

FIG. 2 is a schematic view showing the installation of a bracket for improving the extrusion resistance of a battery pack according to the preferred embodiment;

FIG. 3 is a schematic side view of a bracket for improving the crush resistance of a battery pack according to the preferred embodiment;

fig. 4 is a partial enlarged view of the area a in fig. 3.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings and specific embodiments. The present utility model is not limited to this embodiment, and other embodiments may fall within the scope of the present utility model as long as they meet the gist of the present utility model.

In a preferred embodiment of the present utility model, based on the above-mentioned problems existing in the prior art, a bracket for improving the extrusion resistance of a battery pack is provided, which comprises:

an upper layer plate 1 and a lower layer plate 2, wherein the upper layer plate 1 is arranged above the lower layer plate 2, and the thickness of the upper layer plate 1 is smaller than that of the lower layer plate 2;

the connecting plate 3 is used for connecting the upper layer plate 1 and the lower layer plate 2, and a space is reserved between the upper layer plate 1 and the lower layer plate 2;

wherein, the upper layer plate 1 is provided with a stress crumple zone 11, and one side of the lower layer plate 2 is provided with a bending guide surface 21.

Specifically, in this embodiment, a bracket is provided for the battery pack, so as to improve the extrusion resistance of the battery pack, and the bracket design on the existing battery pack box is mainly based on mounting and fixing the chassis exterior trim parts such as the wire harness, the bottom protection guard plate, the heat shield and the like on the whole vehicle, so that the bracket design is too simple and has a single effect, and can not provide good extrusion resistance when the battery pack is extruded under the conditions of collision and the like of the vehicle; fig. 2 is a schematic view showing the mounting of the bracket on the battery pack according to the present utility model, in order to simulate the extrusion of the battery pack when a vehicle collides, the battery pack is mounted between the extrusion rod and the extrusion stopper for a simulated extrusion test, fig. 3 is a schematic side view showing the mounting of the extrusion test, and fig. 4 is a partial enlarged view of a region a in fig. 3.

In the preferred embodiment of the present utility model, the stress crumple zones 11 are of a wave-like structure.

In this embodiment, the stress crumple zone 11 has a wave-shaped structure; in this embodiment, the bracket is fixed on the side of the battery pack, as can be seen from fig. 1, when the bracket receives extrusion in the transverse direction, the wavy structure of the stress crumple zone 11 starts to shrink and bend relative to other unbent parts by absorbing energy, and the right end of the bracket can be easily expected to bend upwards after touching the vehicle shell by combining with the setting position of the bending guide surface 21, so that a large amount of extrusion energy can be absorbed, the extrusion resistance of the bracket is improved, the bracket can be arranged at a position with smaller distance between the battery pack and other devices on the vehicle, and the extrusion resistance of the battery pack in all directions is enhanced to the greatest extent.

In the preferred embodiment of the present utility model, the connection plates 3 all extend along the first direction;

the wavy structure includes concave surfaces 111 and convex surfaces 112, and the concave surfaces 111 and the convex surfaces 112 are alternately arranged in order along the second direction.

In a preferred embodiment of the present utility model, the concave surface 111 is a concave arc surface, and the convex surface 112 is a convex arc surface.

Specifically, in this embodiment, as shown in fig. 1, the length direction of the upper layer board 1 and the lower layer board 2 is the second direction, the first direction is perpendicular to the second direction, in this embodiment, the concave surface 111 and the convex surface 112 alternately form a stress collapse surface in turn in the second direction, and collapse when receiving the force of extrusion in the second direction, so that one end of the bracket is bent towards the upper layer board direction, and in this embodiment, the concave surface 111 and the convex surface 112 are both cambered surfaces, and other forms such as a folding surface, an irregular surface, and the like can be used as long as the collapse of the alternating concave surface 111 and the alternating convex surface 112 is ensured.

In the preferred embodiment of the present utility model, a hollow energy absorption cavity 4 is formed between the upper plate 1 and the lower plate 2.

In a preferred embodiment of the utility model, a plurality of said webs 3 are included, wherein one of said webs 3 divides said energy absorbing cavity 4 into a first region 41 and a second region 42.

In the preferred embodiment of the utility model, the force-receiving crush zone 11 is located in the first region 41.

Specifically, in this embodiment, as shown in fig. 1, the upper and lower laminate plates are connected by a plurality of connection plates 3, and an energy absorption cavity 4 is formed, so that more energy can be absorbed by the energy absorption cavity 4, and the extrusion resistance of the battery pack is further improved;

one of them connecting plate 3 divides energy-absorbing chamber 4 into two regions, regard visual angle in fig. 1 as the benchmark, can see that atress collapse face 11 is in the upper left side department of energy-absorbing chamber 4, crooked guide surface 21 is in the lower right side department of energy-absorbing chamber 4, the support right-hand member butt vehicle shell or other parts when receiving horizontal force, atress collapse face 11 is buckled, the right-hand member of support is upwards buckled under crooked guide surface 21's effect, form "L" type, at this moment energy-absorbing chamber 4's second region 42 presss from both sides between battery package and car shell along first direction, provide protection and support, absorb a portion extrusion energy, further improve anti extrusion ability.

In the preferred embodiment of the present utility model, the upper plate 1 is provided with a rivet nut processing hole 5, and the rivet nut processing hole 5 is located in the second area 42.

Specifically, in this embodiment, the second region is provided with the rivet nut processing hole 5, the rivet nut may be disposed in the rivet nut processing hole 5, and the rivet nut may be mounted in a battery box of a vehicle when mounted in the vehicle, and a bolt may be disposed on the battery box, so that the rivet nut and the bolt may be directly made to correspond to each other to fix the battery pack in the battery box.

In the preferred embodiment of the present utility model, the curved guide surface 21 is a chamfer structure at the end of the lower plate 2.

In the preferred embodiment of the present utility model, the curved guide surface 21 is an inclined plate connecting the lower plate 2 and the connecting plate 3, and the inclined plate is disposed obliquely with respect to both the lower plate 2 and the connecting plate 3.

Specifically, in this embodiment, the curved guiding surface 21 preferably adopts a chamfer structure that is obliquely arranged, and as shown in fig. 1, the oblique direction of the inclined plate faces the upper plate 1, so that one end of the bracket can be guided to bend upwards when the battery pack is pressed rightward, and the anti-pressing capability is improved.

The foregoing is merely a preferred embodiment and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and drawings, and are intended to be included in the scope of the present utility model.

Claims

1. A bracket for improving the extrusion resistance of a battery pack, comprising:

2. The stent of claim 1, wherein the crush zone is a wave-like structure.

3. The bracket of claim 2, wherein the connection plates each extend in a first direction;

4. A stent as in claim 3 wherein the concave surface is a concave arcuate surface and the convex surface is a convex arcuate surface.

5. The bracket of claim 1 wherein a hollow energy absorbing cavity is formed between the upper and lower plates.

6. The bracket of claim 5, comprising a plurality of webs, wherein one of the webs divides the energy absorbing cavity into a first region and a second region.

7. The stent of claim 6, wherein the crush zone is located in the first region.

8. The bracket of claim 7, wherein the upper plate is provided with a rivet nut machining hole, and the rivet nut machining hole is located in the second area.

9. The bracket of claim 1, wherein the curved guide surface is a chamfer structure at an end of the lower plate.

10. The bracket of claim 1, wherein the curved guide surface is a sloped plate connecting the lower plate and the connecting plate, the sloped plate being sloped with respect to both the lower plate and the connecting plate.