CN218300066U

CN218300066U - Battery bearing structure, battery package and consumer

Info

Publication number: CN218300066U
Application number: CN202222239547.XU
Authority: CN
Inventors: 温世标; 夏明博
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-01-13
Anticipated expiration: 2032-08-24

Abstract

The application discloses battery bearing structure, battery package and consumer. The battery bearing structure comprises an edge beam, a connecting assembly and a bottom plate, wherein the bottom plate and the edge beam together form a cavity for placing a battery module; the connecting assembly is respectively fixedly connected with the bottom plate and the boundary beam to connect the bottom plate and the boundary beam. Connecting bottom plate and boundary beam through coupling assembling, utilizing coupling assembling to increase the joint strength of box bearing part to when satisfying the lightweight requirement, guarantee the reliability of box, avoid the box because of joint strength not enough takes place the fracture.

Description

Battery bearing structure, battery package and consumer

Technical Field

The application relates to the technical field of power batteries, in particular to a battery bearing structure, a battery pack and electric equipment.

Background

The development of new energy automobiles is an important component of low-carbon economy, and the new energy automobiles have important promotion effects on relieving energy supply and demand contradictions, improving the environment and promoting economic sustainable development by opening sources and throttling. The power battery of high-efficient energy storage is the core spare part of new energy automobile, also is the power supply of electric automobile.

The normal work of the power battery is not only related to the performance of the battery, but also closely related to a box body for bearing the power battery, and the box body can avoid damage to the power battery caused by external collision and extrusion. Along with new energy automobile trade development, power battery energy and module weight are constantly increasing, also are higher and higher to the lightweight requirement of structures such as box, so current box that bears power battery adopts aluminium alloy welding, or panel beating shaping welding more, comes weight reduction. However, the welding strength of aluminum profiles and metal plates is weak, after the battery module is assembled, the connection strength of the local bearing part of the box body cannot meet the requirement, the welding part of the box body is cracked, and therefore potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a battery bearing structure, battery package and consumer to effectively solve the problem that the joint strength of the local bearing part of the current box that bears the weight of power battery can not satisfy the requirement.

According to one aspect of the present application, the present application provides a battery carrying structure, which includes an edge beam, a connecting assembly, and a bottom plate, wherein the bottom plate and the edge beam together form a cavity for placing a battery module; the connecting assembly is respectively fixedly connected with the bottom plate and the boundary beam to connect the bottom plate and the boundary beam.

Further, the bottom plate comprises a plurality of bearing structures which are arranged at intervals, and each bearing structure comprises at least one bearing beam; the connecting assembly comprises at least one adapter, the adapter comprises a first connecting part and a second connecting part, the first connecting part is fixedly connected with the load-bearing structure through at least one first fastener, and the second connecting part is welded with the boundary beam or is fixedly connected through at least one second fastener.

Furthermore, a through hole matched with the at least one first fastener is formed in the first connecting part;

the first fastening piece is a threaded fastening piece, and a corresponding threaded hole is formed in the bearing structure.

Furthermore, each spandrel girder includes the main part section and is located respectively the boss section at main part section both ends, the boss section with the adaptor the surface butt of first connecting portion.

Further, in the case where the second connecting portion is welded to the side beam, a surface of the second connecting portion of the adapter facing the side beam is welded to the side beam, and a ratio of an area of the surface of the second connecting portion to an area of a cross section of the main body section of the load beam is greater than 1.

Furthermore, an inclined transition portion is arranged between one side, facing the bearing beam, of the first connecting portion of the adapter and one side, facing the boundary beam, of the second connecting portion of the adapter.

Further, the bottom plate comprises a plurality of load-bearing structures arranged at intervals, and each load-bearing structure comprises at least one load-bearing beam; the connecting assembly comprises a plurality of third fasteners, the third fasteners are positioned on corresponding areas of the edge beam and the load-bearing structure, and the third fasteners penetrate through the edge beam and the bottom plate to fixedly connect the edge beam and the bottom plate;

the third fastener is a threaded fastener, threaded holes matched with the third fastener are formed in the side beam and the bottom plate, and the threaded holes are parallel to the depth direction of the cavity.

Further, at least a partial section of the edge of the floor is welded to the edge beam, said at least partial section being located at both ends of the load-bearing structure;

the bottom plate is also provided with at least one middle beam parallel to the bearing beam, and two ends of the at least one middle beam are fixedly connected with the edge beam through transition pieces;

the cross section of the transition piece is T-shaped, one end of the transition piece is welded with the edge beam, and the other end of the transition piece extends into the middle beam and is fixedly connected with the middle beam through a fastener;

the bottom plate is further provided with at least one partition beam parallel to the bearing beam, and two ends of the at least one partition beam are welded with the edge beam.

According to another aspect of the present application, a battery pack is provided, which includes the battery carrying structure according to any one of the embodiments of the present application, and a battery module mounted on the battery carrying structure.

According to another aspect of the present application, there is provided an electrical device, including the battery pack according to any embodiment of the present application, the battery pack being configured to serve as a power supply source of the electrical device.

The utility model provides an advantage lies in, through coupling assembling connection bottom plate and boundary beam, utilizes coupling assembling to increase the joint strength of box bearing part to when satisfying the lightweight requirement, guarantee the reliability of box, avoid the box because of the not enough emergence fracture of joint strength.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1A is a schematic structural diagram of a battery carrying structure according to an embodiment of the present invention;

FIG. 1B is an enlarged view of portion A of FIG. 1A;

fig. 1C is a partial cross-sectional view of the battery carrying structure provided in the embodiment of fig. 1A;

FIG. 1D is an enlarged view of portion B of FIG. 1C;

fig. 2A is a schematic structural diagram of a battery supporting structure according to another embodiment of the present invention;

fig. 2B isbase:Sub>A cross-sectional view of fig. 2A taken alongbase:Sub>A-base:Sub>A.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

At least one embodiment of the present application provides a battery carrying structure, which includes an edge beam, a connecting assembly, and a bottom plate, wherein the bottom plate and the edge beam together form a cavity for placing a battery module; the connecting assembly is respectively fixedly connected with the bottom plate and the boundary beam so as to connect the bottom plate and the boundary beam.

It is from top to bottom visible, connect bottom plate and boundary beam through coupling assembling, utilize coupling assembling to increase the joint strength of box bearing part to when satisfying the lightweight requirement, guarantee the reliability of box, avoid the box because of joint strength is not enough to take place the fracture.

Fig. 1A is a schematic structural diagram of a battery supporting structure according to an embodiment of the present disclosure, fig. 1B is an enlarged view of a portion a in fig. 1A, fig. 1C is a partial cross-sectional view of the battery supporting structure according to the embodiment in fig. 1A, and fig. 1D is an enlarged view of a portion B in fig. 1C.

As shown in fig. 1A, the battery carrying structure includes an edge beam 10, a bottom plate 20, and a connecting assembly, where the bottom plate 20 and the edge beam 10 together form a cavity 30 for placing a battery module; the connecting assembly is fixedly connected with the bottom plate 20 and the edge beam 10 respectively so as to connect the bottom plate 20 and the edge beam 10.

In the present embodiment, the floor 20 includes a plurality of load-bearing structures 40 arranged at intervals, and each load-bearing structure 40 includes at least one load-bearing beam 410. The load-bearing structure 40 plays a role of supporting and fixing the battery module, and the load-bearing structure 40 is a load-bearing part of the case.

As shown in fig. 1B, in the present embodiment, the connecting assembly includes a plurality of adapters 50, each adapter 50 includes a first connecting portion 510 and a second connecting portion 520, the first connecting portion 510 is fixedly connected to the load-bearing structure 40 by at least one first fastener, and the second connecting portion 520 is welded to the edge beam 10 or fixedly connected by at least one second fastener. It is noted that the second fastener is a threaded fastener, for example, the second fastener is a bolt. By using the adapter 50 as a connecting component, the stress of the load-bearing structure 40 is released by the first fastener, and the stress is transmitted to the adapter 50 and the edge beam 10, so that the reliable connection between the base plate 20 and the edge beam 10 is realized.

In this embodiment, the first connecting portion 510 is provided with a via hole adapted to at least one first fastener. Illustratively, in the present embodiment, the first fastener is a threaded fastener and the load bearing structure 40 is provided with a corresponding threaded bore. It should be noted that the first fastening member may be a bolt.

For example, the first connecting portion 510 is fixedly connected with the load-bearing structure 40 through bolts, so that the welding amount is reduced, the stress residue after welding is reduced, and the risk of structural damage of the box body caused by stress cracking is reduced; when the second connecting portion 520 is welded to the edge beam 10 or fixedly connected to the edge beam by the second fastening member, the stress on the base plate 20 and the load-bearing structure 40 is transmitted to the adapter 50 by the bolts, and the adapter 50 distributes the stress to the edge beam 10 by the welding portion of the second connecting portion 520 and the edge beam 10 or the second fastening member, thereby enhancing the load-bearing capacity of the base plate 20.

As shown in fig. 1C, in the present embodiment, each load-bearing beam 410 includes a main body section 420 and boss sections 430 respectively located at two ends of the main body section 420, and the boss sections 430 are abutted with the first connection portion 510 of the adapter 50 toward the surface of the load-bearing beam 410. Increase the height through setting up boss section 430 to increase load-carrying members 40 and the area of contact of first fastener, increase the screw hole on the load-carrying members 40 and the first fastener complex total number of turns, thereby improve the reliability that first fastener and load-carrying members 40 are connected.

In the present embodiment, in the case where the second connection portion 520 is welded to the edge beam 10, the surface of the second connection portion 520 of the adapter 50 facing the edge beam 10 is welded to the edge beam 10, and the ratio of the area of the surface of the second connection portion 520 facing the edge beam 10 to the area of the cross section of the main body section 420 of the load-bearing beam 410 is greater than 1. Illustratively, in the present embodiment, the ratio of the area of the surface of the second connecting portion 520 facing the side sill 10 to the area of the cross section of the main body section 420 of the load beam 410 is greater than 3. Through the welding of second connecting portion 520 and boundary beam 10, compare in the main part section and the boundary beam welding that adopt the spandrel girder among the prior art, welding area greatly increased to reach release stress, reduce the remaining effect of stress.

As shown in fig. 1B, in the present embodiment, an inclined transition portion is provided between a side of the first connection portion 510 of the adapter 50 facing the load-bearing beam 410 and a side of the second connection portion 520 of the adapter 50 facing the side beam 10. The welding spots at the welding position of the bottom plate 20 and the boundary beam 10 are avoided by arranging the inclined transition part, so that the problem that the adapter 50 cannot be connected with the boundary beam 10 and the bearing structure 40 due to the welding spots is solved.

In this embodiment, at least a portion of the edge of the floor 20 is welded to the edge beam 10, at least a portion of the edge being located at either end of the load bearing structure 40. It should be noted that the bottom plate 20 and the edge beam 10 are friction stir welded, and it should be further noted that, as shown in fig. 1D, a plurality of grooves are disposed on the edge of the bottom plate 20, and auxiliary strips 210 for welding are embedded in the grooves, and in the friction stir welding process, the auxiliary strips 210 are melted at high temperature to connect the bottom plate 20 and the edge beam 10.

As shown in fig. 1A, in this embodiment, at least one middle beam 70 parallel to the bearing beam 410 is further disposed on the bottom plate 20, and both ends of the at least one middle beam 70 are fixedly connected to the edge beam 10 through the transition piece 80. Illustratively, in the present embodiment, the transition piece 80 has a T-shaped cross section, one end of the transition piece 80 is welded to the edge beam 10, and the other end of the transition piece 80 extends into the middle beam 70 and is fixedly connected to the middle beam 70 by a fastener.

In this embodiment, at least one partition beam 90 parallel to the bearing beam 410 is further disposed on the bottom plate 20, and both ends of the at least one partition beam 90 are welded to the edge beam 10.

The cavity 30 is divided into a plurality of independent spaces by the partition beam 90 and the middle beam 70, so that the battery modules and other electric devices in the cavity 30 are independent of each other and do not interfere with each other, and the use is convenient.

From top to bottom, through coupling assembling connection bottom plate and boundary beam, utilize coupling assembling to increase the joint strength of box bearing part to when satisfying the lightweight requirement, guarantee the reliability of box, avoid the box because of joint strength not enough takes place the fracture. Exemplarily, the adapter serves as a connecting assembly, the adapter is fixedly connected with the bearing structure through the first fastener, welding amount is reduced, stress residue after welding is reduced, and the risk of structural damage of the box body caused by stress cracking is reduced.

Fig. 2A isbase:Sub>A schematic structural diagram ofbase:Sub>A battery carrying structure according to another embodiment of the present application, and fig. 2B isbase:Sub>A cross-sectional view taken alongbase:Sub>A directionbase:Sub>A-base:Sub>A in fig. 2A.

As shown in fig. 2A and 2B, fig. 2A differs from fig. 1A in that: the attachment assembly includes a plurality of third fasteners 60, the third fasteners 60 being located on corresponding areas of the side sill 10 and the load bearing structure 40, and the third fasteners 60 extending through the side sill 10 and the floor 20 to fixedly attach the side sill 10 to the floor 20. It should be noted that the X direction is parallel to the length direction of the load-bearing structure, and on a plane perpendicular to the depth direction of the cavity 30, an area surrounded by an intersection of an extension line of the load-bearing structure 40 along the length direction and a projection area of the edge beam 10 is a corresponding area of the edge beam 10 and the load-bearing structure 40. It should also be noted that each load-bearing structure 40 corresponds to at least one third fastener 60.

In this embodiment, the third fastening member 60 is a threaded fastening member, and the edge beam 10 and the bottom plate 20 are both provided with threaded holes adapted to the third fastening member 60, and the threaded holes are parallel to the depth direction of the cavity 30. It should be noted that the third fastening member 60 may be a bolt.

It is from top to bottom visible, connect bottom plate and boundary beam through coupling assembling, utilize coupling assembling to increase the joint strength of box bearing part to when satisfying the lightweight requirement, guarantee the reliability of box, avoid the box because of joint strength is not enough to take place the fracture. Exemplarily, the third fastener penetrates through the boundary beam and the bottom plate to fixedly connect the boundary beam and the bottom plate by serving as a connecting component, so that the connecting strength of the bearing structure is increased, and the reliable connection between the bottom plate and the boundary beam is ensured.

At least one embodiment of this application still provides a battery package, battery package include any embodiment of this application the battery load-bearing structure and install battery module on the battery load-bearing structure.

At least one embodiment of this application still provides a consumer, the consumer include this application any embodiment the battery package, the battery package is used for as the power supply of consumer.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, terms or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship. In the present application, "at least one" means one or more, "a plurality" means two or more.

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic. The above detailed description is made on the battery carrying structure and the battery pack provided in the embodiments of the present application, and specific examples are applied herein to explain the principles and embodiments of the present application, and the above description of the embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A battery bearing structure is characterized by comprising an edge beam (10), a connecting assembly and a bottom plate (20), wherein the bottom plate (20) and the edge beam (10) jointly form a cavity (30) for placing a battery module; the connecting assembly is respectively fixedly connected with the bottom plate (20) and the edge beam (10) so as to connect the bottom plate (20) and the edge beam (10).

2. The battery load bearing structure of claim 1, wherein said floor (20) comprises a plurality of load bearing structures (40) arranged at intervals, each of said load bearing structures (40) comprising at least one load bearing beam (410); the connecting assembly comprises at least one adapter (50), the adapter (50) comprises a first connecting portion (510) and a second connecting portion (520), the first connecting portion (510) is fixedly connected with the load-bearing structure (40) through at least one first fastener, and the second connecting portion (520) is welded with the edge beam (10) or is fixedly connected through at least one second fastener.

3. The battery carrying structure according to claim 2, wherein the first connecting portion (510) is provided with a via hole adapted to the at least one first fastener;

the first fastening member is a threaded fastening member, and a corresponding threaded hole is formed in the load-bearing structure (40).

4. The battery carrier structure according to claim 3, wherein each of the load-bearing beams (410) comprises a main body section (420) and boss sections (430) respectively located at both ends of the main body section (420), the boss sections (430) abutting against a surface of the first connecting portion (510) of the adaptor (50).

5. The battery carrier structure according to claim 4, wherein in the case where the second connecting portion (520) is welded to the edge beam (10), a surface of the second connecting portion (520) of the adaptor (50) is welded to the edge beam (10), and a ratio of an area of the surface of the second connecting portion (520) to an area of a cross section of the main body section (420) of the load beam (410) is greater than 1.

6. The battery carrying structure according to claim 5, characterized in that an inclined transition (530) is provided between the side of the first connection portion (510) of the adapter (50) facing the load-bearing beam (410) and the side of the second connection portion (520) of the adapter (50) facing the edge beam (10).

7. The battery load bearing structure of claim 1, wherein said floor (20) comprises a plurality of load bearing structures (40) arranged at intervals, each of said load bearing structures (40) comprising at least one load bearing beam (410); the connecting assembly comprises a plurality of third fasteners (60), wherein the third fasteners (60) are positioned on corresponding areas of the boundary beam (10) and the bearing structure (40), and the third fasteners (60) penetrate through the boundary beam (10) and the bottom plate (20) to fixedly connect the boundary beam (10) and the bottom plate (20);

the third fastening piece (60) is a threaded fastening piece, threaded holes matched with the third fastening piece (60) are formed in the edge beam (10) and the bottom plate (20), and the threaded holes are parallel to the depth direction of the cavity (30).

8. The battery-carrying structure according to claim 1, wherein at least a partial section of the edge of the floor (20) is welded to the edge beam (10), said at least partial section being located at both ends of the load-bearing structure (40);

the bottom plate (20) is also provided with at least one middle beam (70) parallel to the bearing beam (410), and two ends of the at least one middle beam (70) are fixedly connected with the edge beam (10) through transition pieces (80);

the cross section of the transition piece (80) is T-shaped, one end of the transition piece (80) is welded with the edge beam (10), and the other end of the transition piece (80) extends into the middle beam (70) and is fixedly connected with the middle beam (70) through a fastener;

the bottom plate (20) is further provided with at least one partition beam (90) parallel to the bearing beam (410), and two ends of the at least one partition beam (90) are welded with the edge beam (10).

9. A battery pack comprising the battery carrier structure of any one of claims 1-8 and a battery module mounted on the battery carrier structure.

10. An electrical device, comprising the battery pack of claim 9, the battery pack being configured to serve as a power supply source for the electrical device.