CN107891911B

CN107891911B - Battery package automobile body integral structure and car

Info

Publication number: CN107891911B
Application number: CN201711101332.9A
Authority: CN
Inventors: 曾厚立; 曾蔚; 唐春柳; 黎海; 曾庆伟
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2017-11-09
Filing date: 2017-11-09
Publication date: 2020-09-25
Anticipated expiration: 2037-11-09
Also published as: CN107891911A

Abstract

The invention discloses a battery pack and vehicle body integrated structure and an automobile, wherein the battery pack and vehicle body integrated structure comprises a frame front crossbeam, a frame cross beam and a battery pack; the front frame girder comprises an inner side girder with a U-shaped section and an outer side girder arranged at the U-shaped opening, a cavity is formed between the inner side girder and the outer side girder, and one side of the inner side girder, which is far away from the U-shaped opening, is connected with the bottom plate; the frame cross beam comprises a first flanging welded with the outer side crossbeam and a second flanging welded with the bottom plate. In the technical scheme provided by the invention, the bottom plate of the battery pack is welded on the frame front girder and the frame cross beam, so that a battery pack mounting bracket is omitted, the integration of the battery pack body is realized, the problems of size incompatibility, difficult assembly and the like of the battery pack mounting bracket are solved, in addition, a cavity is formed in the frame front girder, the rigidity of the frame front girder can be improved, the side impact force is relieved, and the impact deformation is absorbed, thereby protecting the battery pack.

Description

Battery package automobile body integral structure and car

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a battery pack and automobile body integrated structure and an automobile.

Background

At present, a battery pack 3 of a traditional new energy electric automobile is often installed and fixed on a frame front beam 1 through a battery pack installation support 4, and the specific structure refers to fig. 1, and the installation mode has the following defects: the battery pack mounting bracket 4 has insufficient strength, so that failure risk exists and the safety performance is influenced; the number of the battery pack mounting brackets 4 is too large, the matching size is difficult to ensure, and the assembly is difficult.

Disclosure of Invention

The invention mainly aims to provide a battery pack and automobile body integrated structure and an automobile, and aims to solve the technical problems of insufficient strength and excessive use quantity of battery pack mounting brackets used in the conventional electric automobile.

In order to achieve the purpose, the battery pack and vehicle body integrated structure provided by the invention comprises a frame front girder, a frame cross beam and a battery pack, wherein the frame cross beam is arranged between the two frame front girders which are arranged in parallel, and the battery pack is arranged between the two frame cross beams which are arranged in parallel; the battery pack comprises a bottom plate and a battery pack arranged on the bottom plate; the front frame girder comprises an inner side girder with a U-shaped cross section and an outer side girder arranged at the U-shaped opening, a cavity is formed between the inner side girder and the outer side girder, and one side of the inner side girder, which is far away from the U-shaped opening, is connected with the bottom plate; the frame cross beam comprises a first flanging welded with the outer side crossbeam and a second flanging welded with the bottom plate.

Preferably, the frame front girder further comprises a reinforcement member arranged in the cavity in a shape like a Chinese character 'ji', and the open end of the reinforcement member and the end opposite to the open end are respectively connected with the inner side girder and the outer side girder.

Preferably, the frame cross beam comprises a connecting part and two side parts respectively connected with two opposite edges of the connecting part, and the two side parts are both arranged perpendicular to the connecting part; the first flanging comprises a third flanging formed by outwards extending the connecting part along the extending direction of the connecting part and a fourth flanging which is vertical to the side part and the connecting part; the second flanging is arranged at one end, far away from the connecting part, of the side part, and is perpendicular to the side part.

Preferably, a space is left between the two side portions to form a cavity.

Preferably, the two folded edges and the third folded edge of the opening end of the reinforcing piece are arranged on two sides, away from the outer side girder, of the reinforcing piece and are arranged oppositely, and the inner space of the reinforcing piece and the cavity are located on two sides, away from the outer side girder, of the reinforcing piece and are arranged oppositely.

Preferably, the reinforcement inner space is enclosed by the frame front side member to form a closed chamber.

Preferably, the cross section of the outer side girder is also U-shaped, and the openings of the outer side girder and the inner side girder are arranged in parallel and level.

Preferably, the battery pack further comprises a battery pack general controller arranged on the bottom plate and used for controlling the battery pack.

Preferably, the battery pack is arranged around the battery pack general controller.

In order to achieve the above object, the present invention also provides an automobile including the battery pack body integrated structure according to any one of the above aspects.

According to the technical scheme, the bottom plate of the battery pack is welded on the front frame beam and the frame cross beam, specifically, the frame cross beam is welded with the front frame beam through the first flanging and is welded with the bottom plate through the second flanging, so that the sealing performance of the battery pack is guaranteed, the rigidity of the whole vehicle is improved, a battery pack mounting support is omitted, the integration of a vehicle body of the battery pack is realized, the problems of size mismatch, difficult assembly and the like of the battery pack mounting support are solved, the chassis arrangement structure is optimized, the occupied space of the battery pack is reduced, and the arrangement difficulty and the interference risk of peripheral systems are reduced. In addition, a cavity is formed in the frame front girder, so that the rigidity of the frame front girder can be improved, the side impact force is relieved, and the collision deformation is absorbed, thereby protecting the battery pack.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a conventional electric vehicle battery pack mounting structure;

fig. 2 is a schematic structural view of a battery pack and vehicle body integrated structure according to an embodiment of the invention;

FIG. 3 is a schematic structural view of a front frame rail of the vehicle frame of FIG. 2;

FIG. 4 is an exploded view of the front frame rail of FIG. 3;

fig. 5 is a schematic structural view of the frame rail of fig. 2.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Front frame beam	22	Second turned-over edge
11	Inner side girder	23	Connecting part
				12	Outside girder	24	Side part
13	Cavity body	25	Hollow cavity
				14	Reinforcing element	3	Battery pack
141	Edge folding	31	Base plate
				2	Vehicle frame cross beam	32	Battery pack
21	First turned-over edge	33	General controller of battery pack
				211	Third flanging	4	Battery pack mounting bracket
212	Fourth turned-over edge

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a battery pack and vehicle body integrated structure.

Referring to fig. 2 to 5, in the present embodiment, the battery pack and body integrated structure includes a frame front frame member 1, a frame cross member 2 and a battery pack 3, wherein the frame cross member 2 is disposed between two frame front frame members 1 disposed in parallel, and the battery pack 3 is disposed between two frame cross members 2 disposed in parallel; the battery pack 3 includes a bottom plate 31 and a battery pack 32 provided on the bottom plate 31; the frame front girder 1 comprises an inner side girder 11 with a U-shaped section and an outer side girder 12 arranged at a U-shaped opening, a cavity 13 is formed between the inner side girder 11 and the outer side girder 12, and one side of the inner side girder 11, which is far away from the U-shaped opening, is connected with a bottom plate 31; the frame cross member 2 includes a first flange 21 for welding with the outer side member 12 and a second flange 22 for welding with the floor 31.

In the technical scheme provided by the invention, the bottom plate 31 of the battery pack 3 is welded on the frame front girder 1 and the frame cross beam 2, specifically, the frame cross beam 2 is welded with the frame front girder 1 through the first flanging 21 and is welded with the bottom plate 31 through the second flanging 22, the sealing property of the battery pack 3 is ensured, the rigidity of the whole vehicle is improved, the battery pack mounting bracket 4 is omitted, the integration of the battery pack 3 and the vehicle body is realized, the problems of improper size, difficult assembly and the like of the battery pack mounting bracket 4 are also eliminated, the chassis arrangement structure is optimized, the occupied space of the battery pack 3 is reduced, and the arrangement difficulty and the interference risk of peripheral systems are reduced. In addition, a cavity 13 is formed in the frame front girder 1, so that the rigidity of the frame front girder 1 can be improved, side impact force is relieved, and collision deformation is absorbed, so that the battery pack 3 is protected, the whole vehicle mass is reduced, and the lightweight design can be realized.

It can be found that the bending area of the frame front girder 1 in fig. 1 is too much, the structure of parts is complex, the formability is poor, and the structure smoothness is poor. The front frame girder 1 is of a U-shaped structure, is smooth, and can improve the part formability and the part qualification rate. In order to prevent the frame front side member 1 from damaging other parts, two corners of the inner side member 11 are rounded.

Referring to fig. 4 again, in order to improve the strength of the frame front side member 1, a reinforcing member 14 having a shape of a Chinese character 'ji' is provided in the cavity 13 of the frame front side member 1, and an open end of the reinforcing member 14 and an end opposite to the open end are connected to the inner side member 11 and the outer side member 12, respectively. Specifically, since the outer side member 12 receives an impact earlier than the inner side member 11 at the time of a vehicle collision, the open end of the reinforcement 14 is welded to the inner side member 11, and the other end, which is not open, is welded to the outer side member 12.

Referring to fig. 5 again, the frame cross member 2 includes a connecting portion 23 and two side portions 24 respectively connected to two opposite edges of the connecting portion 23, and both the two side portions 24 are perpendicular to the connecting portion 23; the first flange 21 includes a third flange 211 formed by extending the connecting portion 23 outward in the extending direction thereof and a fourth flange 212 perpendicular to both the side portion 24 and the connecting portion 23; the second flange 22 is disposed at an end of the side portion 24 away from the connecting portion 23, and is perpendicular to the side portion 24. Specifically, the U-shaped inside girder 11 includes the top and the both sides end that is connected with the top, and the third turn-ups 211 welds with one side end of inside girder 11 mutually, and the fourth turn-ups 212 welds with the top of inside girder 11 mutually to realize the fixed of frame cross member 2 and frame front girder 1, can understand, can set up two parallel connecting portion 23 on frame cross member 2, all set up third turn-ups 211 on two connecting portion 23, thereby weld with the both sides end of inside girder 11 mutually respectively. Also, the frame cross member 2 is good in smoothness, and the part formability and the part yield can be improved.

Preferably, a space is left between the two side portions 24 to form a cavity 25. On one hand, the risk that the battery pack 3 is corroded and compressed during direct collision can be reduced, and the safety performance of the electric automobile is improved; on the other hand, the whole vehicle mass can be further reduced.

Further, two hems 141 and a third hem 211 at the opening end of the reinforcement 14 are arranged on two sides of the outer side girder 12 which are deviated from each other and are arranged oppositely, and the inner space of the reinforcement 14 and the cavity 25 are arranged on two sides of the outer side girder 12 which are deviated from each other and are arranged oppositely. The folded edge 141 of the reinforcing part 14 in the frame front girder 1 is arranged opposite to the third folded edge 211 of the frame cross beam 2, and the inner space of the reinforcing part 14 is arranged opposite to the cavity 25, so that the impact force born by the frame front girder 1 and the frame cross beam 2 during side collision can be improved.

Preferably, the space inside the reinforcement 14 is enclosed by the frame front side member 1 to form a closed chamber, which can optimize stress transmission and provide a smooth structural arrangement.

Referring to fig. 4 again, the cross section of the outside girder 12 is also U-shaped, and the openings of the outside girder 12 and the inside girder 11 are flush. The outer side member 12 is also formed in a U shape, so that the outer side member 12 can be easily welded in the inner side member 11.

Referring to fig. 2 again, the battery pack 3 further includes a battery pack controller 33 disposed on the bottom plate 31 for controlling the battery pack 32. Preferably, the battery pack 32 is disposed around the battery pack controller 33. Because the battery packs 32 are arranged on the bottom plate 31, and the bottom plate 31 is fixed in the space enclosed by the frame front beam 1 and the frame cross beam 2, the problems that the battery pack 3 occupies too much chassis space, interferes with peripheral systems, is difficult to arrange and the like are solved. It can be understood that when the number of the battery packs 32 is too large, the battery packs 32 can be distributed on the two bottom plates 31, the three frame cross beams 2 arranged in parallel and the frame front girder 1 can form two areas for arranging the battery packs 32, and the bottom plates 31 are also welded on the turned edges of the frame cross beams 2.

The invention also provides an automobile which comprises the battery pack and automobile body integrated structure in any one of the embodiments. The specific structure of the battery pack and vehicle body integrated structure refers to the above embodiments, and since the vehicle adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A battery pack and vehicle body integrated structure is characterized by comprising a frame front girder, a frame cross beam and a battery pack, wherein the frame cross beam is arranged between the two frame front girders which are arranged in parallel, and the battery pack is arranged between the two frame cross beams which are arranged in parallel; the battery pack comprises a bottom plate and a battery pack arranged on the bottom plate; the front frame girder comprises an inner side girder with a U-shaped cross section and an outer side girder arranged at the U-shaped opening, a cavity is formed between the inner side girder and the outer side girder, and one side of the inner side girder, which is far away from the U-shaped opening, is connected with the bottom plate; the frame cross beam comprises a first flanging welded with the inner side girder and a second flanging welded with the bottom plate; the front frame girder further comprises a reinforcing part which is shaped like a Chinese character 'ji' and arranged in the cavity, and the open end of the reinforcing part and one end opposite to the open end are respectively connected with the inner side girder and the outer side girder.

2. The battery pack-body integrated structure according to claim 1, wherein the frame cross member includes a connecting portion and two side portions connected to opposite edges of the connecting portion, respectively, both of the side portions being disposed perpendicular to the connecting portion; the first flanging comprises a third flanging formed by outwards extending the connecting part along the extending direction of the connecting part and a fourth flanging which is vertical to the side part and the connecting part; the second flanging is arranged at one end, far away from the connecting part, of the side part, and is perpendicular to the side part.

3. The battery pack body integration structure of claim 2, wherein a space is left between the two side portions to form a cavity.

4. The battery pack and body integrated structure according to claim 3, wherein the two flanges and the third flange of the opening end of the reinforcement are disposed on opposite sides of the outside member, and the inner space of the reinforcement and the cavity are disposed on opposite sides of the outside member.

5. The battery pack body integration structure according to any one of claims 1 to 4, wherein the reinforcement inner space is enclosed by the frame front side member to form a closed chamber.

6. The battery pack vehicle body integrated structure according to any one of claims 1 to 4, wherein the cross section of the outer side member is also U-shaped, and the openings of the outer side member and the inner side member are arranged flush.

7. The battery pack-body integrated structure according to any one of claims 1 to 4, wherein the battery pack further comprises a battery pack overall controller provided on the base plate for controlling the battery pack.

8. The battery pack body integrated structure of claim 7, wherein said battery pack is disposed around said battery pack general controller.

9. An automobile, characterized by comprising the battery pack body integrated structure according to any one of claims 1 to 8.