CN114802452B

CN114802452B - Frame structure and new energy vehicle thereof

Info

Publication number: CN114802452B
Application number: CN202210412004.5A
Authority: CN
Inventors: 丁为广; 刘志威; 陈智家; 郭大洲; ***; 张天成
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-10-13
Anticipated expiration: 2042-04-19
Also published as: CN114802452A

Abstract

The application relates to the field of new energy automobiles, in particular to a frame structure of the new energy automobile and the new energy automobile. A frame structure comprises a battery mounting frame and a cabin beam, wherein the battery mounting frame is connected with the cabin beam and is used for mounting a battery pack; the battery mounting frame comprises a first threshold, a second threshold and a front cross beam which are arranged at intervals, wherein two ends of the front cross beam are respectively connected with one end of the first threshold, which is close to the cabin beam, and one end of the second threshold, which is close to the cabin beam, one side of the front cross beam, which is far away from the first threshold and the second threshold, is connected with the cabin beam, one side of the front cross beam, which is far away from the cabin beam, is provided with a sealing surface, the sealing surface is attached to a battery pack, and the sealing surface is connected with the side of the first threshold, which faces the second threshold, and the side of the second threshold, which faces the first threshold. Its advantage lies in that sealed face does not have unnecessary overlap joint characteristic, and first threshold and second threshold are smooth to be connected towards each other's inside wall to adapt to the periphery side shape of battery tray, with improvement sealing performance, reduce the leakage risk.

Description

Frame structure and new energy vehicle thereof

Technical Field

The application relates to the field of new energy automobiles, in particular to a frame structure of the new energy automobile and the new energy automobile.

Background

With the continuous development of new energy automobiles, electric automobiles become more and more popular, and the cruising of the electric automobiles is always one of the most important factors of people concerned. Since the endurance of an electric vehicle is actually determined by the capacity of a battery, how to increase the capacity of a battery pack is a problem to be solved.

The capacity of the battery pack has a positive correlation with the volume, and the larger the volume of the battery pack is, the larger the capacity of the battery is. The existing battery pack is generally packaged independently, the battery pack is composed of a battery tray, a battery module and an upper cover, the battery module is sealed by the upper cover and the battery tray to form the independent battery pack, the occupied volume of the battery pack is large, and the development of the battery capacity of the new energy vehicle is severely limited. In order to integrate a battery pack with a vehicle frame into a whole to enlarge the volume of the battery pack, a battery tray is generally directly sealed with the vehicle body structure, but a cabin beam and left and right side thresholds of the vehicle frame are connected through a complex lap joint structure, and when the vehicle frame is connected with the battery tray, the sealing difficulty between the vehicle frame and the battery tray is high.

Disclosure of Invention

Based on the above, the present application provides a frame structure, which aims at the above technical problems, and the technical scheme is as follows:

a frame structure comprising a battery mounting frame and a cabin beam, wherein the battery mounting frame is connected with the cabin beam and is used for mounting a battery pack;

the battery mounting frame comprises a first threshold, a second threshold and a front beam which are arranged at intervals, wherein two ends of the front beam are respectively connected with one end of the first threshold, which is close to the cabin beam, and one end of the second threshold, which is close to the cabin beam, the front beam is far away from the first threshold and one side of the second threshold is connected with the cabin beam, one side of the front beam, which is far away from the cabin beam, is provided with a sealing surface, which is used for being attached to a battery pack, and the sealing surface is connected with the side surface of the first threshold, which faces the second threshold, and the side surface of the second threshold, which faces the first threshold.

So set up, battery tray can be integrated as an organic whole with the battery package, has increased the volume of battery package, has enlarged the electric capacity of battery package to sealed face does not have unnecessary overlap joint characteristic, is smooth to be connected with first threshold and second threshold towards each other's inside wall, thereby adapts to battery tray's periphery side shape, makes with battery tray's connection inseparable, in order to improve sealing performance, reduces the leakage risk.

In one embodiment, the sealing surface comprises curved surfaces which are connected in sequence, and the curvature of any two adjacent curved surfaces is continuous.

So set up, sealed face is more smooth, has reduced the leakage risk point that probably exists when being connected with the battery tray, has improved sealing performance.

In one embodiment, the sealing surface has a V-shaped cross section along the length direction, the V-shaped opening facing away from the nacelle beam.

So set up, sealed face and battery tray's area of contact is bigger to make sealing performance better, and the sealed face of V-arrangement can wrap up battery tray, plays bearing and spacing effect to battery tray.

In one embodiment, a bottom plate is arranged on one side of the front cross beam, which is far away from the cabin beam, the sealing surface is positioned on one side of the bottom plate, which is far away from the cabin beam, and a plurality of connecting holes are formed in the bottom plate and used for penetrating connecting pieces so as to fixedly connect the battery pack with the frame structure.

So set up, the connecting piece has further strengthened the joint strength of front cross beam and battery package.

In one embodiment, the front cross beam is provided with a bottom plate on one side far away from the cabin beam, the sealing surface is positioned on one side far away from the cabin beam, two ends of the bottom plate are provided with bending sections, the bending sections bend towards a direction far away from the cabin beam, the bending sections are respectively connected with the inner side walls of the first threshold and the second threshold, and the bending sections are continuous with the inner side walls of the first threshold and the second threshold in curvature.

So set up, the connection of bottom plate and first threshold and second threshold is smooth to improve the suitability with battery tray, make the combination between them inseparabler. Compared with a staggered lap joint structure, the connecting curvature of the frame and the frame is continuous, so that the force transmission is smoother, and the overall structural strength and rigidity of the frame are improved.

In one embodiment, a PVC glue layer is applied between the curved section and the first and second threshold, the PVC glue layer continuing the curvature of the connection between the curved section and the first and second threshold, respectively.

So set up, even if there is fall and step in the connection between crooked section and first threshold and the second threshold, still can rely on the PVC glue film to guarantee the continuous characteristic of camber, reduced manufacturing cost and the technology degree of difficulty.

In one embodiment, the width of the middle portion of the bottom plate is smaller than the width of the two ends, and the width of the bending section gradually increases along the direction away from the center of the bottom plate.

So set up, the bottom plate adaptation is in battery tray to when bottom plate middle part atress, impact force can be dispersed towards both ends, and the bigger terminal surface of width can disperse the power, reduces the atress degree of the regional unit area of being connected with first threshold and second threshold, improves the stability of device.

In one embodiment, the front beam comprises a body, two ends of the body are connected with the first threshold and the second threshold, a cavity is formed in the body, a reinforcing plate is arranged in the cavity, and two ends of the reinforcing plate are respectively abutted to the top wall and the bottom wall of the cavity.

So set up, the cavity is stronger to the bearing capacity of impact force, can offset and release more stress, and the reinforcing plate then can support cavity structure, prevents that the cavity from appearing warping and breaking, influences the stability of frame and with battery tray complex sealing performance.

In one embodiment, the frame structure further comprises a diagonal strut connected to the front cross member and the first or second door sill.

So set up, the bracing roof beam can be with the force conduction that receives on the front cross beam to first threshold and second threshold on to consolidate the joint strength between the two, improve the whole stability performance and the rigidity of device.

The application also provides a new energy vehicle, which comprises the frame structure.

Compared with the prior art, the front cross beam with the sealing surface is arranged between the first threshold and the second threshold, so that the battery tray can be integrated with the battery pack, the volume of the battery pack is increased, the storage capacity of the battery pack is increased, and the sealing surface is free from redundant lap joint characteristics and is smoothly connected with the inner side walls of the first threshold and the second threshold facing each other, so that the shape of the outer periphery side of the battery tray is adapted, the connection with the battery tray is tight, the sealing performance is improved, and the leakage risk is reduced.

Drawings

FIG. 1 is a perspective view of a frame structure provided by the present application;

FIG. 2 is a perspective view of a vehicle frame without a mounting floor provided by the application;

FIG. 3 is a top view of a frame structure provided by the present application;

FIG. 4 is a front view of a floor of the frame structure provided by the present application;

fig. 5 is a cross-sectional view of a floor of a frame structure provided by the present application.

The symbols in the drawings are as follows:

100. a frame structure; 101. a battery mounting frame; 10. a nacelle beam; 20. a front cross member; 21. a body; 22. a connection part; 23. an upper plate; 231. a reinforcing plate; 24. a bottom plate; 241. sealing surfaces; 242. a curved section; 25. a cavity; 30. a first threshold; 40. a second threshold; 50. and (5) a diagonal bracing beam.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present application for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in the description of the present application includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, the present application provides a frame structure 100 for use in the field of new energy automobiles. The frame structure 100 includes a battery mounting frame 101, and the battery mounting frame 101 is used to mount a battery pack.

The battery pack is arranged below the frame structure, and is generally composed of a battery module, a battery tray and an upper cover, wherein the battery module is sealed by the upper cover and the battery tray, so that an independent battery pack is formed. The cabin beam of the frame is connected with the first threshold and the second threshold through complex lap joint structures, and when the cabin beam of the frame is connected with the battery tray, the sealing difficulty of the frame and the battery tray is high.

The present application provides a frame structure 100, the frame structure 100 comprising a battery mounting frame 101 and a cabin beam 10, the battery mounting frame 101 being connected to the cabin beam 10, the battery mounting frame 101 being for mounting a battery pack. The battery mounting frame 101 includes a first threshold 30, a second threshold 40, and a front cross member 20 disposed at intervals, both ends of the front cross member 20 are respectively connected with one end of the first threshold 30 close to the cabin beam 10 and one end of the second threshold 40 close to the cabin beam 10, and one side of the front cross member 20 away from the first threshold 30 and the second threshold 40 is connected with the cabin beam 10.

It can be understood that, along with the continuous development of new energy automobiles, the continuous voyage mileage of the electric automobiles is higher and higher, the whole technical direction is also developing in the integrating direction, the battery pack and the frame structure are integrated into a whole structure, the arrangement space of the battery module can be effectively increased, but the battery box structure is also changed greatly, the traditional upper cover of the battery box is eliminated, the battery pack comprises a battery tray, and the sealing structure of the battery is changed into the sealing between the battery tray and the frame structure from the upper box to the lower box.

Referring to fig. 1 and 4-5, a side of the front cross member 20 away from the cabin beam 10 has a sealing surface 241, the sealing surface 241 is used for attaching to the battery pack, and the sealing surface 241 is connected to a side of the first door sill 30 facing the second door sill 40 and a side of the second door sill 40 facing the first door sill 30.

According to the application, the front cross beam 20 with the sealing surface 241 is arranged between the first threshold 30 and the second threshold 40, so that the battery tray can be integrated with a battery pack, the volume of the battery pack is increased, the storage capacity of the battery pack is increased, and the sealing surface 241 is not provided with redundant lap joint characteristics and is smoothly connected with the inner side walls of the first threshold 30 and the second threshold 40 facing each other, so that the shape of the outer periphery side of the battery tray is adapted, the connection with the battery tray is tight, the sealing performance is improved, and the leakage risk is reduced.

Specifically, the sealing surface 241 includes curved surfaces that connect in turn, and the curvature of any two adjacent curved surfaces is continuous, so that the sealing surface 241 is smoother, possible leakage risk points when being connected with the battery tray are reduced, and sealing performance is improved. The curved surface may be a plane with a curvature of 0.

In other embodiments, the sealing surface 241 may be formed by splicing multiple planes, and the curvature of the sealing surface 241 does not have to be continuous, but only needs to be adapted to the battery tray to achieve a sealing effect.

The sealing surface 241 has a V-shaped cross section along the length direction, and the V-shaped opening faces away from the nacelle beam 10. So set up, sealed face 241 is bigger with battery tray's area of contact to make sealing performance better, and the sealed face 241 of V-arrangement can wrap up battery tray, plays bearing and spacing effect to battery tray.

It should be understood that the cross section of the sealing surface 241 along the length direction may be U-shaped, C-shaped, -shaped, S-shaped, etc., and may be adapted to the outer shape of the mounted battery tray, and the connection area between the sealing surface 241 and the battery tray may be increased, without being limited to the V-shape described in the present embodiment.

The side of the front cross beam 20 away from the cabin beam 10 is provided with a bottom plate 24, the sealing surface 241 is positioned on the side of the bottom plate 24 away from the cabin beam 10, and a plurality of connecting holes are formed in the bottom plate 24 and used for penetrating connecting pieces so as to fixedly connect the battery pack with the frame structure 100, so that the connection strength of the front cross beam 20 and the battery pack is further enhanced.

In this embodiment, the connection member employs bolts that connect the bottom plate 24 and the battery tray, thereby improving the connection strength of the two. Meanwhile, in the assembly process of the vehicle body structure, the bottom plate 24 is assembled in the last process, so that the accumulated tolerance of the welding process is effectively reduced, and the precision of the fixed point of the tray is ensured.

Further, the bottom plate 24 has curved sections 242 at both ends, the curved sections 242 being curved in a direction away from the cabin beam 10, the curved sections 242 being connected to the inner side walls of the first and second side sills 30, 40, respectively, and the curvature between the curved sections 242 and the inner side walls of the first and second side sills 30, 40 being continuous. By this arrangement, the connection between the bottom plate 24 and the first and second thresholds 30 and 40 is smooth, so that the adaptability to the battery tray can be improved, and the combination of the two can be made tighter. Compared with a staggered lap joint structure, the connecting curvature of the frame and the frame is continuous, so that the force transmission is smoother, and the overall structural strength and rigidity of the frame are improved.

Further, for cost reasons, a PVC glue layer is coated between the curved section 242 and the first and second sills 30 and 40, which makes the curvature of the connection between the curved section 242 and the first and second sills 30 and 40 continuous. The connection between the curved section 242 and the first and second sills 30, 40, even if there are steps and steps, still relies on the feature that the PVC glue layer ensures continuous curvature, reducing manufacturing costs and process difficulties.

In addition, in the conventional frame structure 100, the bottom plate 24 or the cross member is generally connected between the first threshold 30 and the second threshold 40 by a lap joint structure, and the impact force applied to the cabin beam 10 cannot be smoothly transferred to the first threshold 30 and the second threshold 40 due to the complex force transfer path of the lap joint structure, so that the overall stress effect is poor and the rigidity is insufficient.

In view of the above, the front cross member 20 of the present application includes the connecting portion 22 and the body 21, the connecting portion 22 is connected to the body 21, one side of the connecting portion 22 away from the body 21 is connected to the cabin beam 10, the portion of the connecting portion 22 connected to the body 21 extends toward both ends of the body 21, one end of the body 21 is connected to one end of the first door sill 30 near the cabin beam 10, and the other end of the body 21 is connected to one end of the second door sill 40 near the cabin beam 10.

By connecting the front cross member 20, the cabin beam 10 and the first and second door sills 30, 40 and optimizing the connection structure therebetween, when the cabin beam 10 is impacted, the impact force on the cabin beam 10 can be transferred to the first and second door sills 30, 40 through the connection portion 22 and the body 21, optimizing the force transmission path, commonly stressing the entire frame structure 100, improving the rigidity, strength and impact bearing capacity of the frame structure 100.

Specifically, the lower surfaces of the first and second sills 30, 40 are connected to the lower surface of the front cross member 20, and the lower surface of the front cross member 20 is connected to the lower surface of the cabin beam 10, so as to optimize the force transmission path and improve the rigidity of the vehicle frame.

Further, the upper surface of the first rocker 30 and the upper surface of the second rocker 40 are connected to the upper surface of the front cross member 20, and the upper surface of the front cross member 20 is connected to the upper surface of the cabin girder 10. So that the impact force can be smoothly transferred to the entire frame along the connection paths of the cabin beam 10, the front cross beam 20, and the first and second sills 30 and 40, improving the rigidity of the frame.

It should be noted that, in the present application, the drawing is an inverted frame structure 100, and in the actual production and use process, the upper surface of the frame structure 100 in fig. 1-2 is actually the lower surface, and the upper surface and the lower surface of the frame structure 100 in the present application are both the upper surface and the lower surface of the frame structure 100 in the actual use process.

The body 21 has a cavity 25 therein, and a reinforcing plate 231 is disposed in the cavity 25, and the reinforcing plate 231 is used for supporting the cavity 25. So set up, cavity 25 is stronger to the bearing capacity of impact force, can offset and release more stress, and reinforcing plate 231 then can support cavity 25 structure, prevents that cavity 25 from appearing warping and breaking, influences the stability of frame and with battery tray complex sealing performance.

Specifically, the body 21 further includes an upper plate 23, a lower plate and the bottom plate 24, where the upper plate 23, the lower plate and the bottom plate 24 enclose a cavity 25, and one side of the cavity 25 away from the sealing surface 241 is an opening, and the reinforcing plate 231 is disposed on the upper plate 23 and connected to the upper plate 23. Both ends of the upper plate 23 extend toward the first and second sills 30 and 40 and are finally connected with the first and second sills 30 and 40. When the front cross member 20 receives the impact force transmitted from the cabin beam 10, the upper plate 23 can also help the front cross member 20 distribute the impact force to the first and second door sills 30 and 40, and the reinforcing plate 231 supports the upper plate 23 to distribute the stress applied to the upper plate 23, thereby preventing the upper plate 23 from being deformed.

Referring to fig. 3, the frame structure 100 further includes a diagonal strut 50, where the diagonal strut 50 is connected to the front cross member 20 and the first door sill 30 or the second door sill 40, so as to transfer the force applied on the front cross member 20 to the first door sill 30 and the second door sill 40, and strengthen the connection strength between the two, thereby improving the overall stability and rigidity of the device.

The application also provides a new energy vehicle, which comprises the frame structure 100.

Compared with the prior art, the frame structure 100 provided by the application has the advantages that the front cross beam 20 with the sealing surface 241 is arranged between the first threshold 30 and the second threshold 40, the sealing surface 241 is of a left-right penetrating integrated structure, no redundant lap joint characteristic exists, and the front cross beam is smoothly connected with the inner side walls of the first threshold 30 and the second threshold 40 facing each other, so that the shape of the outer periphery side of the battery tray is adapted, the connection with the battery tray is tight, the sealing performance is improved, and the leakage risk is reduced. By connecting the front cross member 20, the cabin beam 10 and the first and second door sills 30, 40 and optimizing the connection structure therebetween, when the cabin beam 10 is impacted, the impact force on the cabin beam 10 can be transferred to the first and second door sills 30, 40 through the connection portion 22 and the body 21, optimizing the force transmission path, commonly stressing the entire frame structure 100, improving the rigidity, strength and impact bearing capacity of the frame structure 100.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A vehicle frame structure comprising a battery mounting frame (101) and a cabin beam (10), the battery mounting frame (101) being connected to the cabin beam (10), the battery mounting frame (101) being for mounting a battery pack;

the battery mounting frame (101) comprises a first threshold (30), a second threshold (40) and a front beam (20) which are arranged at intervals, wherein two ends of the front beam (20) are respectively connected with one end of the first threshold (30) close to the cabin beam (10) and one end of the second threshold (40) close to the cabin beam (10), one side of the front beam (20) away from the first threshold (30) and the second threshold (40) is connected with the cabin beam (10), one side of the front beam (20) away from the cabin beam (10) is provided with a sealing surface (241), the sealing surface (241) is used for being attached to a battery pack, the sealing surface (241) is sequentially connected with the side face of the first threshold (30) towards the second threshold (40) and the side face of the second threshold (40) towards the first threshold (30), and the sealing surface (241) comprises a curved surface, and any two adjacent curved surfaces are sequentially connected;

the front cross beam (20) is far away from one side of the cabin beam (10) and is provided with a bottom plate (24), the sealing surface (241) is positioned on one side of the bottom plate (24) far away from the cabin beam (10), two ends of the bottom plate (24) are provided with bending sections (242), the bending sections (242) bend towards the direction far away from the cabin beam (10), the bending sections (242) are respectively connected with the inner side walls of the first threshold (30) and the second threshold (40), and the bending sections (242) are respectively continuous with the curvatures between the inner side walls of the first threshold (30) and the second threshold (40).

2. The frame structure according to claim 1, characterized in that the sealing surface (241) is V-shaped in cross section along the length direction, the opening of the V-shape being directed away from the cabin rail (10).

3. The frame structure according to claim 1, characterized in that a bottom plate (24) is provided on a side of the front cross member (20) away from the cabin beam (10), the sealing surface (241) is located on a side of the bottom plate (24) away from the cabin beam (10), and a plurality of connecting holes are provided on the bottom plate (24) for penetrating connecting members for fixedly connecting the battery pack with the frame structure.

4. The frame structure according to claim 1, characterized in that a PVC glue layer is applied between the curved section (242) and the first (30) and second (40) threshold, which PVC glue layer continues the curvature of the connection between the curved section (242) and the first (30) and second (40) threshold.

5. The frame structure according to claim 1, wherein the width of the middle portion of the bottom plate (24) is smaller than the width of both ends, and the width of the curved section (242) gradually increases in a direction away from the center of the bottom plate (24).

6. The frame structure according to claim 1, wherein the front cross member (20) comprises a body (21), two ends of the body (21) are connected with the first threshold (30) and the second threshold (40), a cavity (25) is formed in the body (21), a reinforcing plate (231) is arranged in the cavity (25), and two ends of the reinforcing plate (231) are respectively abutted to the top wall and the bottom wall of the cavity (25).

7. The frame structure according to claim 1, characterized in that the frame structure further comprises a diagonal strut (50), the diagonal strut (50) being connected to the front cross member (20) and the first (30) or second (40) rocker.

8. A new energy vehicle, characterized by comprising a battery pack and a frame structure according to any one of claims 1-7, said battery pack being attached to said sealing surface (241).