CN210554142U

CN210554142U - Battery pack tray

Info

Publication number: CN210554142U
Application number: CN201921019422.8U
Authority: CN
Inventors: 洪阳阳; 严胜利; 周必达; 占莉
Original assignee: Weirui Electric Automobile Technology Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Liankong Technologies Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-05-19
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a battery pack tray, which comprises a polygonal frame, wherein the polygonal frame is composed of a plurality of frames, and the frames are of hollow structures; a base plate disposed within the polygonal frame; the reinforcing piece is used for reinforcing the strength of the joint of the two frames, the reinforcing piece is arranged in the cavity of the joint of the two frames, and the shape of the reinforcing piece is matched with that of the cavity. The utility model discloses a battery package tray innovation put the reinforcement inside the frame cavity, can stabilize and the effectual joint strength that promotes connects, reduce because of the intensity influence of welding quality and frame lateral wall trompil in advance to the welding joint position to can reduce to occupy the battery package in and the outer limited space of arranging of package.

Description

Battery pack tray

Technical Field

The utility model relates to a battery technology field especially relates to a battery package tray.

Background

In recent years, with the growing awareness of environmental protection and the active subsidy policy of the country, new energy vehicles have been developed rapidly, and with the continuous improvement of the requirements for the safety performance of new energy vehicles, the safety design of a battery pack becomes a key point of attention.

At present, a tray of a power battery pack of a new energy automobile is divided into a bottom plate and a frame, the frame is connected in a welding mode through extruded aluminum alloy, but due to unequal weldability of aluminum alloy welding, performance loss can be caused to a joint by a welding process, the strength of the tray is only about 60% of that of base metal, and the tray becomes a performance weakening point of a frame structure of the battery pack. Once the frame joint fails, the structural strength and the sealing performance of the battery pack are irreparably influenced, so that the normal use of the battery pack is influenced.

At present, aiming at the condition that the strength of the welding joint is low, enough attention of a host factory is not paid yet, and the solutions of most host factories at the present stage are mainly two: firstly, the joint part is not reinforced, and the loss of performance is compensated by only increasing the thickness of the frame as a whole; the performance of the welding joint can meet the performance requirement, and other parts of the frame can cause performance over-design and material waste;

secondly, a reinforcing structure is additionally arranged outside the welding joint, and the reinforcing structure can be installed in a welding or mechanical connection mode; such a process is complicated and occupies a large space, and may affect the arrangement, process, and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package tray to solve the poor problem of prior art battery package tray frame welding point intensity.

The utility model provides a battery package tray, include: the polygonal frame is composed of a plurality of borders, and the borders are of hollow structures; a base plate disposed within the polygonal frame; the reinforcing piece is used for reinforcing the strength of the joint of the two frames, the reinforcing piece is arranged in the cavity of the joint of the two frames, and the shape of the reinforcing piece is matched with that of the cavity.

Preferably, the reinforcing member comprises a reinforcing frame, and the reinforcing frame is further provided with a plurality of cavities.

Preferably, the reinforcing frame is further provided with a plurality of first through holes, the frame is further provided with a plurality of second through holes corresponding to the first through holes, and the reinforcing piece is riveted with the frame through the first through holes and the second through holes.

Preferably, the reinforcing member and the frame are connected and fixed by gluing.

Preferably, the plurality of frames are connected in sequence by welding.

Preferably, the number of the reinforcing members is equal to the number of sides of the polygonal frame.

Preferably, the frame is made of an aluminum alloy material.

Preferably, the bottom plate is made of an aluminum alloy material.

Preferably, the reinforcement is made of an aluminum alloy material.

Preferably, the reinforcement is made of a glass fiber reinforced resin composite material and/or a carbon fiber reinforced resin composite material.

Compared with the prior art, the technical scheme of the utility model following beneficial effect has:

(1) the battery pack tray of the utility model innovatively places the reinforcing part inside the frame cavity, can stably and effectively improve the connection strength of the frame joint, and reduces the influence of the welding quality and the pre-opening of the side wall of the frame on the strength of the welding joint;

(2) the battery pack tray of the utility model has the advantages that the built-in design of the reinforcing part can reduce the influence on the later-stage gluing or other post-treatment process implementation of the external welding joint, and can reduce the occupation of the limited arrangement space inside and outside the battery pack, and simultaneously can effectively prevent the corrosion of the reinforcing part;

(3) the utility model discloses a reinforcement of battery package tray can adopt the aluminum alloy ex-trusions, also can be the combined material who has certain intensity, and can reduce the waste of performance overdesign and material through the whole thickness that reduces the frame, the whole car environmental protection of satisfying and lightweight demand that can be better.

Drawings

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

Fig. 1 is a schematic structural view of a battery pack tray according to an embodiment of the present invention;

fig. 2 is a schematic view of a weld joint according to an embodiment of the present invention;

3 FIG. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 2 3 with 3 reinforcement 3 members 3 disposed 3 within 3 the 3 bezel 3; 3

Fig. 4 is a schematic structural view of a reinforcing member according to an embodiment of the present invention;

the following is a supplementary description of the drawings:

1-a polygonal frame; 2-a bottom plate; 3-a reinforcement; 4-riveting; 101-a first border; 102-a second bezel; 301-first via.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with at least one implementation of the invention is included. In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

In the existing tray for the battery pack, two modes are generally adopted to reinforce a welding joint, firstly, the joint part is not reinforced, and the loss of performance is compensated by only increasing the thickness of a frame integrally; secondly, a reinforcing structure is additionally arranged outside the welding joint, and the reinforcing structure can be installed in a welding or mechanical connection mode; however, the first scheme can cause performance over-design on other parts of the frame, generate excessive waste on materials, and is not beneficial to the light weight and low cost scheme design of the battery pack; the strength of the second scheme is not obviously increased, the mode of welding reinforcing blocks is adopted for reinforcement, the welding quality is difficult to control, the reinforcing structure is installed in a mechanical mode, connecting holes need to be formed in the frame, the connecting holes weaken the strength of the whole frame, the interval between the reinforcing structure and the original welding joint is small, the operations such as coating and sealing glue at the welding joint are affected, the occupied space of the external installation reinforcing structure is large, and the arrangement space of a battery pack is affected.

The embodiment of the utility model provides an in, the utility model discloses a battery package tray innovation is put the reinforcement inside the frame cavity, can stabilize and the joint strength of effectual promotion joint, reduce because of the intensity influence of welding quality and frame lateral wall pre-trompil to the welding head position, can reduce the influence of rubber coating or other aftertreatment technology implementation to outside welding head department later stage, and can reduce and occupy the battery package and wrap outer limited arrangement space, can also effectively prevent the corruption of reinforcement, lightweight combined material can be selected to the material of reinforcement, and can reduce the waste of performance oversignment and material through the thickness that wholly reduces the frame, can be better satisfy whole car environmental protection and lightweight demand.

An embodiment of the utility model provides a battery package tray, as shown in fig. 1-4, include: the polygonal frame 1 is composed of a plurality of frames, and the frames are of hollow structures; a base plate 2, the base plate 2 being disposed within the polygonal frame 1; and the reinforcing part 3 is used for reinforcing the strength of the joint of the two frames, the reinforcing part 3 is arranged in the cavity of the joint of the two frames, and the shape of the reinforcing part 3 is matched with that of the cavity.

Referring to fig. 1 and 2, in an embodiment of the present invention, the polygonal frame 2 is formed by connecting six side frames in sequence, and the polygonal frame 2 is disposed on the bottom plate 1 to form a battery pack tray; the connection modes of the six frames are all welding, the six welding joints are respectively provided with a reinforcing part 3, taking one of the six welding joints as an example, the first frame 101 and the second frame 102 form a V-shaped structure through welding, a V-shaped cavity is formed inside the first frame 101 and the second frame 102, and the built-in reinforcing part 3 is prefabricated into a V-shaped structure matched with the V-shaped cavity. The design of placing the frame in 3 in the reinforcement can reduce the influence of gluing or other aftertreatment technology implementation to outside welded joint department later stage to can reduce and occupy the battery package in and wrap limited arrangement space outward, can also effectively prevent the corruption of 3 reinforcements.

With reference to fig. 3 and 4, the reinforcing member 3 includes a reinforcing frame, the reinforcing frame is attached to the cavity wall of the V-shaped cavity, the reinforcing frame is further provided with a plurality of cavities, and the reinforcing member 3 with a non-solid design is adopted, so that the material can be further reduced, and the light weight requirement can be met.

Strengthening frame still is equipped with four first through-holes 301, first frame 101 and second frame 102 still be equipped with respectively two with the second through-hole that first through-hole 301 corresponds, reinforcement 3 with first frame 101 with second frame 102 passes through first through-hole with the riveting of second through-hole, rivet 4 is for sealing self-plugging rivet, can further strengthen to the welded joint.

It should be noted that the number and the arrangement positions of the first through holes and the second through holes are not particularly limited, and may be four first through holes and four second through holes symmetrically distributed as shown in fig. 3, or may be other numbers or positions as long as the reinforcement can be connected and fixed with the two corresponding frames; in addition, the shape or structure of the reinforcing member 3 is not particularly limited as long as the shape or structure of the reinforcing member 3 can match with the cavity formed by connecting the two corresponding frames; the connection method of the reinforcement 3 to the first frame 101 and the second frame 102 is not particularly limited, and may be riveting by the rivet 4 as described above, or may be bolting or other mechanical connection method as long as the reinforcement 3 can be fixed in the polygonal frame 1.

In an embodiment of the present invention, the reinforcing member 3 and the frame can be further fixed by gluing.

As an alternative embodiment, the frame is made of an aluminum alloy material.

As an alternative embodiment, the base plate 1 is made of an aluminum alloy material.

As an alternative embodiment, the reinforcement 3 is made of an aluminium alloy material.

As an alternative embodiment, the reinforcement 3 is made of a glass fiber reinforced resin composite and/or a carbon fiber reinforced resin composite.

The reinforcing member 3 may be made of an aluminum alloy material, or may be a composite material having a certain strength, such as a glass fiber reinforced resin composite material (GFRP) or a carbon fiber reinforced resin composite material (CFRP), and the like, and the material selection range is wide.

In an embodiment of the present invention, the manufacturing method of the reinforced frame of the battery pack tray of the present invention is as follows:

firstly, the two ends of a prefabricated reinforcing part 3 are respectively plugged into the corresponding frames, through a certain limiting design, the first through holes in the reinforcing part 3 correspond to the second through holes in the frames, the frames are welded pairwise to form a polygonal frame, and finally the reinforcing part and the frames are fixedly connected through rivets.

As an optional implementation manner, the reinforced frame of the battery pack tray of the present invention may also be designed to be only glued with the composite material, and need not be connected by welding. The position that concrete scheme needs the welded for 3 both sides frames of reinforcement shortens, simultaneously, 3 cross-sections at here of reinforcement expand to frame cross sectional dimension, be about to prefabricated reinforcement 3 and enlarge at the size of both sides frame intersection, from this, when the both ends of reinforcement are filled in both sides frame respectively and are arrived the limited position, both sides frame is not mutual butt, but the protruding position that the both sides frame butt reinforcement 3 expands respectively, bond both sides frame respectively with reinforcement butt department.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A battery pack tray, comprising:

the polygonal frame (1), the polygonal frame (1) is composed of a plurality of borders, and the borders are of hollow structures;

a base plate (2), the base plate (2) being disposed within the polygonal frame (1);

the reinforcing piece (3) is used for reinforcing the strength of the joint of the two frames, the reinforcing piece (3) is arranged in the cavity of the joint of the two frames, and the shape of the reinforcing piece (3) is matched with that of the cavity.

2. A battery pack tray according to claim 1, wherein the reinforcement (3) comprises a reinforcing frame, which is further provided with a plurality of cavities.

3. The battery pack tray according to claim 2, wherein the reinforcing frame is further provided with a plurality of first through holes (301), the rim is further provided with a plurality of second through holes corresponding to the plurality of first through holes (301), and the reinforcing member is riveted with the rim through the first through holes (301) and the second through holes.

4. The battery pack tray according to claim 2, wherein the reinforcement (3) is fixed to the frame by gluing.

5. The battery pack tray of claim 1, wherein the plurality of side frames are connected in sequence by welding.

6. Battery pack tray according to claim 1, characterized in that the number of stiffeners (3) is equal to the number of sides of the polygonal frame.

7. The battery pack tray of claim 1, wherein the rim is made of an aluminum alloy material.

8. The battery pack tray according to claim 1, wherein the bottom plate (2) is made of an aluminum alloy material.

9. A battery pack tray according to claim 1, wherein the reinforcement (3) is made of an aluminium alloy material.

10. The battery pack tray according to claim 1, wherein the reinforcement (3) is made of a glass fiber reinforced resin composite material and/or a carbon fiber reinforced resin composite material.